STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 19.6 19.1 20.1 24.2 29.7 31.4 33.1 33.9 32.5 30.6 27.2 22.9 27.0 MINIMUN AIR TEMPERATURE (C) 12.8 15.4 17.2 20.8 26.3 28.1 29.6 31.3 28.9 26.4 23.2 19.6 23.3 DAYS WITH MINIMUM TEMP. >=21 0 0 2 14 31 30 31 31 30 31 28 10 238 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 9.4 1.3 13.6 17.6 23.0 25.4 26.8 29.4 26.6 24.0 20.0 16.0 1.3 DAY 23 2 4 3 4 1 4 8 26 9 22 23 MAXIMUM AIR TEMPERATURE (C) 21.6 21.5 22.1 26.5 32.6 33.9 35.5 35.9 35.2 33.6 29.6 25.6 29.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 5 25 30 30 30 30 31 11 2 194 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.4 24.2 24.6 33.5 37.2 37.8 38.4 39.0 38.0 38.6 31.2 30.6 39.0 DAY 1 21 17 25 11 29 21 18 19 3 2 7 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 6.1 4.9 5.7 6.3 5.8 5.9 4.6 6.3 7.2 6.4 6.0 6.2 MEAN DAILY TEMP. (MDT) (C) 17.2 18.5 19.7 23.7 29.5 31.0 32.6 33.6 32.0 30.0 26.4 22.6 26.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.8 2.9 82.7 262.7 300.3 346.1 378.2 330.9 278.4 162.2 56.0 2201.3 HEATING DEG. DAYS(BASE 18 0C) 27.5 12.1 2.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 41.8 DEWPOINT (MEAN C) 11.7 13.0 14.2 17.7 22.4 26.8 28.5 29.0 26.6 22.7 21.4 17.4 20.9 MIXING RATIO (G/KG) 8.85 9.50 10.40 12.90 17.50 22.81 25.52 26.21 22.59 17.72 16.13 12.60 16.90 VAPOUR PRESSURE (HPA) 14.28 15.28 16.67 20.54 27.49 35.37 39.27 40.32 35.14 27.97 25.70 20.20 26.52 SATURATION DEF. (HPA) 8.73 6.92 6.94 9.96 14.54 10.91 11.70 12.75 14.03 16.24 10.59 7.98 10.94 RELATIVE HUMIDITY (MEAN %) 62 69 71 69 67 77 78 76 72 64 72 72 71 RELATIVE HUMIDITY (MAX. %) 72 79 81 82 79 89 94 87 84 82 85 81 83 RELATIVE HUMIDITY (MIN. %) 54 61 62 57 54 66 64 68 64 53 62 64 61 RELATIVE HUMIDITY (MEAN% 03UTC) 71 76 78 81 76 89 93 86 83 80 84 80 81 RELATIVE HUMIDITY (MEAN% 09UTC) 56 65 66 65 61 75 76 75 68 57 67 68 67 RELATIVE HUMIDITY (MEAN% 15UTC) 62 70 72 68 68 73 71 71 73 65 72 71 70 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.0 46.0 40.3 32.0 0.0 0.0 0.0 15.4 0.0 0.0 0.0 0.1 143.8 DAYS WITH PRECIPITATION >=10 1 3 1 2 0 0 0 1 0 0 0 0 8 DAYS WITH PRECIPITATION >= 5 1 3 3 2 0 0 0 1 0 0 0 0 10 DAYS WITH PRECIPITATION >= 1 1 4 6 3 0 0 0 1 0 0 0 0 15 DAYS WITH PRECIPITATION 1 6 7 4 0 0 0 2 0 0 1 3 24 GREATEST DAILY PRECIPITATION 10.0 17.0 16.0 17.0 0.0 0.0 0.0 15.0 0.0 0.0 0.0 0.1 17.0 DAY 20 12 12 10 ** ** ** 8 ** ** ** 28 DAY WITH THUNDER STORM 0 0 1 1 0 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 9 4 1 0 0 2 0 4 0 0 1 0 21 WIND DIRECTION (PREVAILING) 315 315 315 270 270 270 270 90 270 315 90 315 270 PREVAILING WIND SPEED(KNOTS) 14.6 12.7 15.4 9.5 12.2 10.2 8.6 10.0 7.8 8.4 9.1 11.5 9.9 PREVAILING WIND PERCENT 39.4 24.5 24.5 30.7 49.4 29.3 31.2 28.4 28.0 37.4 14.7 28.4 23.4 CALMS PERCENT OF WIND 12.9 19.4 9.0 6.7 5.2 18.7 31.8 23.2 33.3 22.6 31.3 17.4 19.3 NO. OF WIND OBSERVATION 155 139 155 150 154 150 154 155 150 155 150 155 1822 VECTOR WIND DIRECTION (MEAN) 309 324 311 283 278 255 257 106 261 318 1 314 291 VECTOR WIND MAGNITUDE(KNOTS) 6.2 2.0 3.7 4.9 8.2 4.8 2.9 2.1 2.7 3.9 0.6 3.5 3.1 WIND STEADINESES (MEAN %) 58.5 23.3 35.6 49.0 75.2 64.0 50.0 27.6 62.8 69.6 12.2 46.7 39.7 WIND SPEED (MEAN KNOTS) 10.6 8.6 10.4 10.0 10.9 7.5 5.8 7.6 4.3 5.6 4.9 7.5 7.8 FASTEST WIND DIRECTION 330 310 310 300 300 280 90 90 300 300 340 300 330 FASTEST WIND SPEED (KNOTS) 31 31 29 25 23 19 17 27 16 16 19 29 31 DAY 20 28 18 29 20 5 14 8 19 5 17 13 DAYS WITH SKY CLEAR (0-2)/8 16 16 16 14 20 30 26 22 28 31 24 13 256 DAYS WITH P.CLOUDY (3-6)/8 12 7 7 12 11 0 5 7 2 0 4 18 85 DAYS WITH CLOUDY (7-8)/8 3 5 8 4 0 0 0 2 0 0 2 0 24 DAYS WITH VISIBILITY =< 2 KM 0 2 1 1 0 2 2 0 1 0 0 0 9 DURATION OF SUNSHINE HOURS 219.4 190.7 226.9 248.8 325.8 331.2 304.7 246.0 293.2 307.1 266.5 ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.9 1016.4 1015.1 1011.2 1005.2 1000.2 997.1 998.1 1003.4 1011.0 1016.9 1017.8 1009.3 MAX. QFE PRESSURE IN HPA 1024.5 1023.3 1020.0 1018.3 1012.0 1008.2 1004.0 1003.9 1010.0 1019.6 1022.2 1024.1 1024.5 DAY-HOUR 11- 6 3- 6 27- 6 19- 6 5- 6 1- 6 7- 9 31- 6 30- 9 28- 6 28- 6 25- 6 MIN. QFE PRESSURE IN HPA 1013.9 1008.6 1006.4 1006.0 1000.5 992.9 992.0 994.0 998.1 1005.1 1012.1 1011.2 992.0 DAY-HOUR 20- 3 17-15 23-15 10-15 29-15 29- 3 20-15 10-15 9-15 6-12 11-12 13-12 MEAN QNH PRESSURE IN HPA 1019.1 1016.6 1015.3 1011.4 1005.4 1000.4 997.4 998.3 1003.7 1011.3 1017.2 1018.0 1009.5 MAX. QNH PRESSURE IN HPA 1024.7 1023.5 1020.2 1018.5 1012.2 1008.4 1004.2 1004.1 1010.2 1019.8 1022.4 1024.3 1024.7 DAY-HOUR 11- 6 3- 6 27- 6 19- 6 5- 6 1- 6 7- 9 31- 6 30- 9 28- 6 28- 6 25- 6 MIN. QNH PRESSURE IN HPA 1014.1 1008.8 1006.6 1006.2 1000.7 993.1 992.2 994.2 998.3 1005.3 1012.3 1011.4 992.2 DAY-HOUR 20- 3 17-15 23-15 10-15 29-15 29- 3 20-15 10-15 9-15 6-12 11-12 13-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.6 1016.2 1015.2 1011.0 1004.8 1000.0 997.1 998.3 1003.3 1010.6 1016.8 1017.8 1009.1 MAX. QFE PRESSURE IN HPA 1023.7 1021.9 1018.8 1016.2 1011.0 1006.4 1002.4 1002.3 1007.7 1018.0 1020.4 1021.9 1023.7 DAY 12 3 1 19 6 1 7 31 30 28 28 25 MIN. QFE PRESSURE IN HPA 1013.9 1010.7 1008.1 1007.4 1001.4 992.9 993.5 995.6 1000.0 1005.8 1012.8 1012.6 992.9 DAY 20 18 23 12 11 29 20 17 7 7 11 13 MEAN QNH PRESSURE IN HPA 1018.8 1016.4 1015.4 1011.2 1005.1 1000.3 997.3 998.5 1003.5 1010.9 1017.0 1018.0 1009.4 MAX. QNH PRESSURE IN HPA 1023.9 1022.1 1019.0 1016.4 1011.2 1006.6 1002.6 1002.5 1007.9 1018.2 1020.6 1022.1 1023.9 DAY 12 3 1 19 6 1 7 31 30 28 28 25 MIN. QNH PRESSURE IN HPA 1014.1 1010.9 1008.3 1007.6 1001.6 993.1 993.7 995.8 1000.2 1006.0 1013.0 1012.8 993.1 DAY 20 18 23 12 11 29 20 17 7 7 11 13 MEAN QFF PRESSURE IN HPA 1019.1 1016.7 1015.7 1011.5 1005.3 1000.3 997.6 998.7 1003.8 1011.1 1017.3 1018.3 1009.6 MAX. QFF PRESSURE IN HPA 1024.2 1022.4 1019.3 1016.7 1011.5 1005.1 1002.9 1002.8 1008.2 1018.5 1020.9 1022.4 1024.2 DAY 12 3 1 19 6 4 7 31 30 28 28 25 MIN. QFF PRESSURE IN HPA 1014.4 1011.2 1008.6 1007.9 1001.9 993.4 994.0 996.1 1000.5 1006.3 1013.3 1013.1 993.4 DAY 20 18 23 12 11 29 20 17 7 7 11 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1020.4 1017.9 1016.4 1012.4 1006.3 1001.2 998.2 999.4 1004.7 1012.5 1018.5 1019.4 1010.6 MAX. QFE PRESSURE IN HPA 1024.5 1023.3 1020.0 1018.3 1012.0 1008.2 1003.8 1003.9 1009.7 1019.6 1022.2 1024.1 1024.5 DAY 11 3 27 19 5 1 7 31 30 28 28 25 MIN. QFE PRESSURE IN HPA 1016.6 1012.6 1009.8 1009.0 1002.8 994.2 994.8 997.0 1000.9 1007.4 1014.5 1014.2 994.2 DAY 24 18 23 30 11 29 20 5 7 6 11 13 MEAN QNH PRESSURE IN HPA 1020.6 1018.1 1016.7 1012.6 1006.6 1001.4 998.4 999.6 1004.9 1012.7 1018.7 1019.6 1010.8 MAX. QNH PRESSURE IN HPA 1024.7 1023.5 1020.2 1018.5 1012.2 1008.4 1004.0 1004.1 1009.9 1019.8 1022.4 1024.3 1024.7 DAY 11 3 27 19 5 1 7 31 30 28 28 25 MIN. QNH PRESSURE IN HPA 1016.8 1012.8 1010.0 1009.2 1003.0 994.4 995.0 997.2 1001.1 1007.6 1014.7 1014.4 994.4 DAY 24 18 23 30 11 29 20 5 7 6 11 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.6 1017.2 1015.9 1012.2 1006.1 1001.1 998.0 998.8 1004.3 1011.8 1017.7 1018.5 1010.1 MAX. QFE PRESSURE IN HPA 1023.9 1022.9 1019.8 1018.3 1011.8 1007.5 1004.0 1003.4 1010.0 1018.3 1021.3 1023.4 1023.9 DAY 11 3 26 19 6 1 7 31 30 31 28 25 MIN. QFE PRESSURE IN HPA 1016.9 1012.2 1008.2 1009.0 1002.8 994.5 994.7 996.2 1000.5 1006.9 1013.5 1013.0 994.5 DAY 24 27 23 14 11 29 21 17 7 6 11 13 MEAN QNH PRESSURE IN HPA 1019.9 1017.5 1016.1 1012.4 1006.3 1001.3 998.2 999.1 1004.6 1012.1 1017.9 1018.7 1010.3 MAX. QNH PRESSURE IN HPA 1024.1 1023.1 1020.0 1018.5 1012.0 1007.7 1004.2 1003.6 1010.2 1018.5 1021.5 1023.6 1024.1 DAY 11 3 26 19 6 1 7 31 30 31 28 25 MIN. QNH PRESSURE IN HPA 1017.1 1012.4 1008.4 1009.2 1003.0 994.7 994.9 996.4 1000.7 1007.1 1013.7 1013.2 994.7 DAY 24 27 23 14 11 29 21 17 7 6 11 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.8 1015.3 1013.9 1010.3 1004.6 999.7 996.5 997.2 1002.7 1010.1 1015.7 1016.6 1008.4 MAX. QFE PRESSURE IN HPA 1022.5 1020.9 1017.6 1016.8 1009.5 1005.5 1003.3 1001.8 1007.7 1017.0 1019.4 1020.7 1022.5 DAY 11 3 1 19 5 4 7 31 30 27 28 5 MIN. QFE PRESSURE IN HPA 1014.3 1009.3 1007.0 1006.4 1001.0 993.6 992.5 994.6 998.4 1005.1 1012.1 1011.2 992.5 DAY 15 17 23 10 11 29 20 17 9 6 11 13 MEAN QNH PRESSURE IN HPA 1018.0 1015.5 1014.1 1010.6 1004.8 999.9 996.7 997.4 1002.9 1010.4 1016.0 1016.9 1008.6 MAX. QNH PRESSURE IN HPA 1022.7 1021.1 1017.8 1017.0 1009.7 1005.7 1003.5 1002.0 1007.9 1017.2 1019.6 1020.9 1022.7 DAY 11 3 1 19 5 4 7 31 30 27 28 5 MIN. QNH PRESSURE IN HPA 1014.5 1009.5 1007.2 1006.6 1001.2 993.8 992.7 994.8 998.6 1005.3 1012.3 1011.4 992.7 DAY 15 17 23 10 11 29 20 17 9 6 11 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1018.2 1015.5 1013.9 1010.1 1004.1 999.1 996.0 996.8 1002.3 1010.2 1016.0 1016.8 1008.3 MAX. QFE PRESSURE IN HPA 1023.1 1021.1 1017.9 1016.3 1009.5 1004.9 1002.2 1001.9 1007.9 1017.3 1020.1 1020.9 1023.1 DAY 11 3 1 19 5 4 7 31 30 31 28 25 MIN. QFE PRESSURE IN HPA 1014.1 1008.6 1006.4 1006.0 1000.5 993.4 992.0 994.0 998.1 1005.1 1012.1 1012.7 992.0 DAY 15 17 23 10 29 28 20 10 9 6 11 12 MEAN QNH PRESSURE IN HPA 1018.5 1015.7 1014.1 1010.4 1004.3 999.3 996.2 997.0 1002.6 1010.4 1016.3 1017.1 1008.5 MAX. QNH PRESSURE IN HPA 1023.3 1021.3 1018.1 1016.5 1009.7 1005.1 1002.4 1002.1 1008.1 1017.5 1020.3 1021.1 1023.3 DAY 11 3 1 19 5 4 7 31 30 31 28 25 MIN. QNH PRESSURE IN HPA 1014.3 1008.8 1006.6 1006.2 1000.7 993.6 992.2 994.2 998.3 1005.3 1012.3 1012.9 992.2 DAY 15 17 23 10 29 28 20 10 9 6 11 12 MEAN QFF PRESSURE IN HPA 1018.7 1016.0 1014.4 1010.6 1004.6 999.4 996.3 997.3 1002.8 1010.7 1016.5 1017.3 1008.7 MAX. QFF PRESSURE IN HPA 1023.6 1021.6 1018.4 1016.8 1010.0 1005.4 1002.7 1002.4 1008.4 1017.8 1020.6 1021.4 1023.6 DAY 11 3 1 19 5 4 7 31 30 31 28 25 MIN. QFF PRESSURE IN HPA 1014.6 1009.1 1006.9 1006.5 1001.0 993.9 992.5 994.5 998.6 1005.6 1012.6 1013.2 992.5 DAY 15 17 23 30 29 28 20 10 9 6 11 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 21.0 21.0 23.3 27.5 29.2 30.4 33.2 32.7 32.2 29.7 26.9 22.6 27.5 MINIMUN AIR TEMPERATURE (C) 17.2 17.9 20.1 23.6 25.9 27.2 30.2 29.7 28.5 25.7 23.1 20.3 24.1 DAYS WITH MINIMUM TEMP. >=21 0 1 14 30 31 30 31 31 30 31 28 12 269 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 14.0 14.0 16.0 21.2 21.4 25.4 28.2 28.4 25.8 22.6 20.6 17.6 14.0 DAY 31 3 3 3 4 5 3 25 25 30 27 30 MAXIMUM AIR TEMPERATURE (C) 23.6 23.4 26.1 31.1 32.5 32.8 35.8 34.8 34.3 31.9 29.4 24.4 30.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 19 26 30 31 31 30 24 11 0 203 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.5 25.6 31.6 37.6 36.6 35.8 38.4 36.6 35.8 34.8 31.6 29.6 38.4 DAY 2 13 29 29 27 10 3 1 6 6 12 7 DIF. BETWEEN (MAX.-MIN.) (C) 6.4 5.5 6.0 7.5 6.6 5.6 5.6 5.1 5.8 6.2 6.3 4.1 5.9 MEAN DAILY TEMP. (MDT) (C) 20.4 20.7 23.1 27.3 29.2 30.0 33.0 32.3 31.4 28.8 26.3 22.3 27.1 COOLING DEG. DAYS(BASE 21 0C) 6.0 9.9 68.8 189.6 254.3 270.0 372.1 349.2 313.3 241.3 157.6 44.6 2276.7 HEATING DEG. DAYS(BASE 18 0C) 0.7 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.1 DEWPOINT (MEAN C) 12.1 14.0 18.8 20.0 22.6 25.0 28.7 27.3 25.4 20.9 18.8 15.6 20.8 MIXING RATIO (G/KG) 8.94 10.18 13.78 15.15 17.70 20.52 25.83 23.64 20.96 15.92 13.69 11.30 16.47 VAPOUR PRESSURE (HPA) 14.41 16.37 21.92 23.95 27.77 31.83 39.70 36.52 32.73 25.24 21.86 18.12 25.87 SATURATION DEF. (HPA) 10.56 8.54 6.81 13.15 13.11 11.76 11.27 12.98 15.64 16.72 13.81 9.43 11.98 RELATIVE HUMIDITY (MEAN %) 58 66 77 67 69 74 79 74 68 60 62 66 68 RELATIVE HUMIDITY (MAX. %) 69 74 90 86 83 85 94 88 83 73 74 75 81 RELATIVE HUMIDITY (MIN. %) 49 59 66 52 56 64 64 65 58 52 54 60 58 RELATIVE HUMIDITY (MEAN% 03UTC) 67 72 89 85 80 85 93 87 83 72 73 72 80 RELATIVE HUMIDITY (MEAN% 09UTC) 52 63 72 62 65 70 78 70 64 55 57 63 64 RELATIVE HUMIDITY (MEAN% 15UTC) 58 65 74 62 68 73 70 70 65 59 63 66 66 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.4 0.1 4.4 0.0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 34.6 43.5 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH PRECIPITATION >= 5 0 0 0 0 0 0 0 0 0 0 0 4 4 DAYS WITH PRECIPITATION >= 1 0 0 1 0 1 0 0 0 0 0 0 4 6 DAYS WITH PRECIPITATION 2 1 4 0 1 0 0 0 0 0 0 4 12 GREATEST DAILY PRECIPITATION 0.4 0.1 4.2 0.0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 14.0 14.0 DAY 31 28 19 ** 10 ** ** ** ** ** ** 29 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 5 12 6 9 10 8 4 10 6 5 5 11 91 WIND DIRECTION (PREVAILING) 315 90 270 270 270 270 270 270 270 90 315 90 270 PREVAILING WIND SPEED(KNOTS) 13.7 13.9 8.8 11.9 12.4 9.9 9.2 9.4 9.6 11.4 9.7 12.6 10.0 PREVAILING WIND PERCENT 27.1 34.5 22.6 38.0 45.8 36.7 21.9 38.7 29.3 22.6 26.0 32.3 25.0 CALMS PERCENT OF WIND 36.1 17.9 14.8 14.0 6.5 19.3 11.0 12.9 18.0 23.9 18.7 18.1 17.6 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 304 31 324 285 281 268 231 262 246 353 274 27 287 VECTOR WIND MAGNITUDE(KNOTS) 3.4 2.6 1.3 6.8 8.1 5.9 1.1 4.5 2.7 0.5 3.0 3.5 2.8 WIND STEADINESES (MEAN %) 52.3 24.5 15.5 70.8 77.1 74.7 14.1 65.2 40.9 7.5 42.9 38.5 34.6 WIND SPEED (MEAN KNOTS) 6.5 10.6 8.4 9.6 10.5 7.9 7.8 6.9 6.6 6.7 7.0 9.1 8.1 FASTEST WIND DIRECTION 310 310 70 310 280 300 10 280 200 100 300 340 340 FASTEST WIND SPEED (KNOTS) 29 29 35 25 29 31 23 17 23 27 27 39 39 DAY 20 16 18 28 2 1 24 26 13 9 21 28 DAYS WITH SKY CLEAR (0-2)/8 14 21 10 17 18 29 25 28 30 30 15 12 249 DAYS WITH P.CLOUDY (3-6)/8 17 6 12 12 7 1 6 2 0 1 6 9 79 DAYS WITH CLOUDY (7-8)/8 0 2 9 1 6 0 0 1 0 0 9 10 38 DAYS WITH VISIBILITY =< 2 KM 1 1 2 1 2 6 11 3 0 0 0 0 27 DURATION OF SUNSHINE HOURS ****** ****** 224.0 294.1 294.3 281.6 309.1 289.6 288.1 284.5 264.7 200.3 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1017.0 1016.7 1012.0 1008.3 1004.7 997.4 996.4 997.7 1004.8 1012.5 1015.8 1016.7 1008.4 MAX. QFE PRESSURE IN HPA 1024.1 1023.0 1021.0 1012.3 1009.4 1004.5 1001.0 1002.2 1011.3 1017.4 1022.8 1021.3 1024.1 DAY-HOUR 5- 6 21- 6 1- 6 2- 9 4- 9 4- 9 26- 6 24- 6 22- 6 20- 6 26- 6 17- 6 MIN. QFE PRESSURE IN HPA 1011.3 1011.6 1004.0 1003.4 997.6 993.0 991.1 994.0 995.8 1007.7 1011.8 1012.7 991.1 DAY-HOUR 19-15 16-12 15-15 25-15 28-15 16-15 20-15 7-15 1-12 1-15 15-12 7-12 MEAN QNH PRESSURE IN HPA 1017.2 1016.9 1012.3 1008.5 1004.9 997.6 996.6 997.9 1005.1 1012.8 1016.1 1017.0 1008.6 MAX. QNH PRESSURE IN HPA 1024.3 1023.2 1021.2 1012.5 1009.6 1004.7 1001.2 1002.4 1011.5 1017.6 1023.0 1021.5 1024.3 DAY-HOUR 5- 6 21- 6 1- 6 2- 9 4- 9 4- 9 26- 6 24- 6 22- 6 20- 6 26- 6 17- 6 MIN. QNH PRESSURE IN HPA 1011.5 1011.8 1004.2 1003.6 997.8 993.2 991.3 994.2 996.0 1007.9 1012.0 1012.9 991.3 DAY-HOUR 19-15 16-12 15-15 25-15 28-15 16-15 20-15 7-15 1-12 1-15 15-12 7-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1016.1 1011.8 1007.7 1004.2 997.3 996.3 997.8 1004.5 1012.2 1015.5 1016.4 1008.0 MAX. QFE PRESSURE IN HPA 1022.9 1020.9 1019.5 1010.4 1008.0 1002.9 999.8 1000.9 1009.0 1015.0 1020.9 1019.5 1022.9 DAY 5 21 2 2 1 1 26 24 26 22 26 24 MIN. QFE PRESSURE IN HPA 1012.2 1011.8 1004.6 1004.7 998.0 993.6 992.9 994.7 996.5 1007.9 1012.3 1013.1 992.9 DAY 19 18 15 8 29 16 20 6 1 1 16 10 MEAN QNH PRESSURE IN HPA 1016.9 1016.3 1012.0 1008.0 1004.5 997.6 996.5 998.0 1004.8 1012.5 1015.8 1016.6 1008.3 MAX. QNH PRESSURE IN HPA 1023.1 1021.1 1019.7 1010.6 1008.2 1003.1 1000.0 1001.1 1009.2 1015.2 1021.1 1019.7 1023.1 DAY 5 21 2 2 1 1 26 24 26 22 26 24 MIN. QNH PRESSURE IN HPA 1012.4 1012.0 1004.8 1004.9 998.2 993.8 993.1 994.9 996.7 1008.1 1012.5 1013.3 993.1 DAY 19 18 15 8 29 16 20 6 1 1 16 10 MEAN QFF PRESSURE IN HPA 1017.2 1016.6 1012.3 1008.2 1004.7 997.8 996.8 998.2 1005.0 1012.7 1016.0 1016.9 1008.5 MAX. QFF PRESSURE IN HPA 1023.4 1021.4 1020.0 1010.9 1008.5 1003.4 1000.3 1001.4 1009.5 1015.5 1021.4 1020.0 1023.4 DAY 5 21 2 2 1 1 26 24 26 22 26 24 MIN. QFF PRESSURE IN HPA 1012.7 1012.3 1005.1 1005.2 998.5 994.1 993.4 995.2 997.0 1008.4 1012.8 1013.6 993.4 DAY 19 18 15 26 29 16 20 6 1 1 16 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1018.1 1013.4 1009.6 1005.8 998.5 997.6 998.9 1006.1 1014.1 1017.4 1018.3 1009.7 MAX. QFE PRESSURE IN HPA 1024.1 1023.0 1021.0 1012.3 1009.0 1004.1 1001.0 1002.2 1011.3 1017.4 1022.8 1021.3 1024.1 DAY 5 21 1 13 4 1 26 24 22 20 26 17 MIN. QFE PRESSURE IN HPA 1012.7 1013.8 1006.7 1006.3 999.6 994.8 993.5 996.2 997.9 1009.9 1014.7 1015.6 993.5 DAY 29 16 15 25 29 16 20 6 1 1 15 7 MEAN QNH PRESSURE IN HPA 1018.6 1018.4 1013.7 1009.8 1006.0 998.7 997.8 999.1 1006.4 1014.3 1017.6 1018.5 1009.9 MAX. QNH PRESSURE IN HPA 1024.3 1023.2 1021.2 1012.5 1009.2 1004.3 1001.2 1002.4 1011.5 1017.6 1023.0 1021.5 1024.3 DAY 5 21 1 13 4 1 26 24 22 20 26 17 MIN. QNH PRESSURE IN HPA 1012.9 1014.0 1006.9 1006.5 999.8 995.0 993.7 996.4 998.1 1010.1 1014.9 1015.8 993.7 DAY 29 16 15 25 29 16 20 6 1 1 15 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1017.9 1013.2 1009.5 1005.8 998.3 997.3 998.6 1005.8 1013.3 1016.5 1017.2 1009.3 MAX. QFE PRESSURE IN HPA 1023.0 1022.7 1020.6 1012.3 1009.4 1004.5 1000.6 1002.2 1011.0 1016.4 1022.0 1020.6 1023.0 DAY 4 21 1 2 4 4 26 24 22 20 26 17 MIN. QFE PRESSURE IN HPA 1013.2 1013.8 1006.9 1005.6 999.6 994.3 993.3 996.0 997.4 1009.7 1013.6 1014.1 993.3 DAY 19 16 15 25 29 16 20 6 1 1 15 28 MEAN QNH PRESSURE IN HPA 1018.2 1018.1 1013.4 1009.7 1006.1 998.5 997.5 998.8 1006.0 1013.5 1016.7 1017.4 1009.5 MAX. QNH PRESSURE IN HPA 1023.2 1022.9 1020.8 1012.5 1009.6 1004.7 1000.8 1002.4 1011.2 1016.6 1022.2 1020.8 1023.2 DAY 4 21 1 2 4 4 26 24 22 20 26 17 MIN. QNH PRESSURE IN HPA 1013.4 1014.0 1007.1 1005.8 999.8 994.5 993.5 996.2 997.6 1009.9 1013.8 1014.3 993.5 DAY 19 16 15 25 29 16 20 6 1 1 15 28 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.8 1015.7 1011.0 1007.7 1004.1 996.8 995.8 996.9 1004.0 1011.6 1014.8 1015.7 1007.5 MAX. QFE PRESSURE IN HPA 1021.7 1020.8 1018.4 1010.2 1007.8 1003.1 998.7 999.7 1008.8 1014.6 1019.6 1019.6 1021.7 DAY 4 20 1 2 1 4 26 24 22 20 25 17 MIN. QFE PRESSURE IN HPA 1011.4 1011.6 1004.2 1003.9 998.1 993.2 991.8 994.5 995.8 1007.9 1011.8 1012.7 991.8 DAY 29 16 15 25 29 16 20 6 1 1 15 7 MEAN QNH PRESSURE IN HPA 1016.1 1015.9 1011.2 1007.9 1004.3 997.1 996.0 997.2 1004.2 1011.8 1015.0 1015.9 1007.7 MAX. QNH PRESSURE IN HPA 1021.9 1021.0 1018.6 1010.4 1008.0 1003.3 998.9 999.9 1009.0 1014.8 1019.8 1019.8 1021.9 DAY 4 20 1 2 1 4 26 24 22 20 25 17 MIN. QNH PRESSURE IN HPA 1011.6 1011.8 1004.4 1004.1 998.3 993.4 992.0 994.7 996.0 1008.1 1012.0 1012.9 992.0 DAY 29 16 15 25 29 16 20 6 1 1 15 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1016.0 1015.7 1010.9 1007.2 1003.6 996.3 995.2 996.5 1003.8 1011.6 1015.0 1016.3 1007.3 MAX. QFE PRESSURE IN HPA 1021.7 1020.5 1018.4 1010.2 1007.4 1002.5 998.0 999.3 1008.3 1015.2 1019.8 1020.1 1021.7 DAY 4 20 1 2 2 4 26 24 22 20 26 17 MIN. QFE PRESSURE IN HPA 1011.3 1011.6 1004.0 1003.4 997.6 993.0 991.1 994.0 995.8 1007.7 1012.2 1013.1 991.1 DAY 19 16 15 25 28 16 20 7 1 1 15 9 MEAN QNH PRESSURE IN HPA 1016.3 1016.0 1011.1 1007.4 1003.8 996.5 995.4 996.7 1004.0 1011.8 1015.3 1016.5 1007.6 MAX. QNH PRESSURE IN HPA 1021.9 1020.7 1018.6 1010.4 1007.6 1002.7 998.2 999.5 1008.5 1015.4 1020.0 1020.3 1021.9 DAY 4 20 1 2 2 4 26 24 22 20 26 17 MIN. QNH PRESSURE IN HPA 1011.5 1011.8 1004.2 1003.6 997.8 993.2 991.3 994.2 996.0 1007.9 1012.4 1013.3 991.3 DAY 19 16 15 25 28 16 20 7 1 1 15 9 MEAN QFF PRESSURE IN HPA 1016.5 1016.2 1011.4 1007.7 1004.1 996.7 995.6 997.0 1004.3 1012.1 1015.5 1016.8 1007.8 MAX. QFF PRESSURE IN HPA 1022.2 1021.0 1018.9 1010.7 1007.9 1003.0 998.5 999.8 1008.8 1015.7 1020.3 1020.6 1022.2 DAY 4 20 1 2 2 4 26 24 22 20 26 17 MIN. QFF PRESSURE IN HPA 1011.8 1012.1 1004.5 1003.9 998.1 993.5 991.6 994.5 996.3 1008.2 1012.7 1013.6 991.6 DAY 19 16 15 25 28 16 20 7 1 1 15 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 21.9 21.1 23.5 26.1 29.7 31.5 32.9 34.2 32.8 30.5 27.4 22.9 27.9 MINIMUN AIR TEMPERATURE (C) 19.0 17.7 20.1 22.6 26.1 27.9 30.3 30.8 29.2 26.6 23.7 19.9 24.5 DAYS WITH MINIMUM TEMP. >=21 4 2 11 27 31 30 31 31 30 31 29 11 268 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 16.4 14.0 17.0 18.0 22.5 26.0 27.5 29.0 27.5 24.2 20.6 16.0 14.0 DAY 1 16 1 15 2 5 2 16 29 19 25 31 MAXIMUM AIR TEMPERATURE (C) 24.2 23.4 26.1 29.0 32.9 34.3 35.0 36.3 35.2 33.0 29.7 25.1 30.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 3 11 29 30 31 31 30 31 10 0 206 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.8 26.4 31.6 33.8 39.5 40.2 37.5 38.2 37.0 35.8 31.7 28.5 40.2 DAY 31 2 23 23 28 8 10 15 30 6 12 3 DIF. BETWEEN (MAX.-MIN.) (C) 5.2 5.7 6.0 6.4 6.8 6.4 4.7 5.5 6.0 6.4 6.0 5.2 5.9 MEAN DAILY TEMP. (MDT) (C) 21.6 20.5 23.1 25.8 29.5 31.1 32.6 33.5 32.2 29.8 26.7 22.5 27.4 COOLING DEG. DAYS(BASE 21 0C) 26.5 10.9 68.6 144.2 264.3 303.9 360.6 389.0 336.3 273.2 171.5 51.9 2401.2 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DEWPOINT (MEAN C) 15.9 11.9 16.5 18.9 23.2 25.5 27.1 28.0 26.3 22.3 18.4 13.5 20.6 MIXING RATIO (G/KG) 11.45 8.96 12.04 13.90 18.39 21.14 23.45 24.64 22.10 17.38 13.32 9.89 16.39 VAPOUR PRESSURE (HPA) 18.35 14.39 19.20 22.05 28.81 32.80 36.20 38.04 34.45 27.44 21.27 15.89 25.74 SATURATION DEF. (HPA) 8.10 10.78 10.03 12.07 13.35 13.59 14.08 15.88 15.54 16.44 15.34 12.16 13.11 RELATIVE HUMIDITY (MEAN %) 70 58 66 66 70 72 73 71 70 63 59 57 66 RELATIVE HUMIDITY (MAX. %) 80 71 78 80 85 85 85 84 83 76 71 64 79 RELATIVE HUMIDITY (MIN. %) 61 49 56 54 57 61 63 60 61 55 51 50 57 RELATIVE HUMIDITY (MEAN% 03UTC) 78 70 77 80 85 85 85 84 83 76 71 62 78 RELATIVE HUMIDITY (MEAN% 09UTC) 66 53 61 60 66 68 70 70 65 59 55 54 62 RELATIVE HUMIDITY (MEAN% 15UTC) 68 56 65 64 67 68 68 65 67 61 58 57 64 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.3 0.0 2.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10.5 23.4 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 0 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH PRECIPITATION >= 1 1 0 1 0 0 0 0 0 0 0 0 2 4 DAYS WITH PRECIPITATION 1 0 3 0 0 0 0 0 0 0 0 2 6 GREATEST DAILY PRECIPITATION 10.3 0.0 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9.5 10.3 DAY 6 ** 30 ** ** ** ** ** ** ** ** 5 DAY WITH THUNDER STORM 1 0 1 0 0 0 0 0 0 0 0 1 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 6 15 9 14 12 8 11 5 3 3 6 12 104 WIND DIRECTION (PREVAILING) 270 315 315 270 270 270 270 90 270 270 315 315 270 PREVAILING WIND SPEED(KNOTS) 9.9 15.9 10.8 11.5 9.1 9.5 8.5 9.8 7.7 8.5 10.4 12.6 9.3 PREVAILING WIND PERCENT 19.4 40.0 31.0 38.7 44.5 45.3 22.6 41.3 24.2 24.5 32.7 29.7 24.6 CALMS PERCENT OF WIND 33.5 13.6 18.7 7.3 15.5 11.3 21.9 21.3 25.5 25.2 22.7 20.6 19.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 149 155 150 155 1824 VECTOR WIND DIRECTION (MEAN) 280 292 293 283 278 274 235 84 269 283 305 317 287 VECTOR WIND MAGNITUDE(KNOTS) 1.9 8.5 5.0 6.8 6.4 6.2 0.9 3.4 1.8 2.2 3.4 2.0 3.4 WIND STEADINESES (MEAN %) 29.2 81.0 68.5 74.7 81.0 77.5 15.0 53.1 34.0 43.1 52.3 24.4 47.2 WIND SPEED (MEAN KNOTS) 6.5 10.5 7.3 9.1 7.9 8.0 6.0 6.4 5.3 5.1 6.5 8.2 7.2 FASTEST WIND DIRECTION 200 320 310 300 310 300 300 110 90 300 300 300 320 FASTEST WIND SPEED (KNOTS) 25 39 25 31 25 27 21 19 19 17 21 35 39 DAY 3 17 25 8 11 10 4 4 16 22 7 5 DAYS WITH SKY CLEAR (0-2)/8 7 27 10 20 24 29 25 29 28 31 25 18 273 DAYS WITH P.CLOUDY (3-6)/8 20 0 20 9 4 1 6 2 2 0 4 9 77 DAYS WITH CLOUDY (7-8)/8 4 1 1 1 3 0 0 0 0 0 1 4 15 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 4 2 9 0 0 2 0 1 18 DURATION OF SUNSHINE HOURS 229.6 267.1 151.2 279.4 308.7 339.0 210.3 297.1 288.3 311.6 272.2 225.0 3179.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1016.2 1013.9 1013.0 1009.1 1004.1 998.6 996.9 998.6 1004.4 1010.7 1015.0 1017.2 1008.1 MAX. QFE PRESSURE IN HPA 1021.9 1019.1 1022.0 1014.2 1010.8 1002.8 1001.3 1005.1 1010.9 1017.3 1019.6 1022.8 1022.8 DAY-HOUR 13- 6 28- 9 5- 6 21- 6 9- 6 5- 6 24- 6 30- 6 22- 6 26- 6 27- 6 31- 6 MIN. QFE PRESSURE IN HPA 1012.3 1009.0 1004.7 1004.1 996.9 994.9 992.6 993.5 998.7 1005.7 1009.6 1011.8 992.6 DAY-HOUR 31-12 16-12 24-12 24-15 28-15 27-15 18-15 7-15 6-15 8-15 6-12 27-12 MEAN QNH PRESSURE IN HPA 1016.4 1014.1 1013.2 1009.3 1004.3 998.8 997.1 998.8 1004.6 1010.9 1015.2 1017.5 1008.4 MAX. QNH PRESSURE IN HPA 1022.1 1019.3 1022.2 1014.4 1011.0 1003.0 1001.5 1005.3 1011.1 1017.5 1019.8 1023.0 1023.0 DAY-HOUR 13- 6 28- 9 5- 6 21- 6 9- 6 5- 6 24- 6 30- 6 22- 6 26- 6 27- 6 31- 6 MIN. QNH PRESSURE IN HPA 1012.5 1009.2 1004.9 1004.3 997.1 995.1 992.8 993.7 998.9 1005.9 1009.8 1012.0 992.8 DAY-HOUR 31-12 16-12 24-12 24-15 28-15 27-15 18-15 7-15 6-15 8-15 6-12 27-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.0 1013.3 1012.7 1008.6 1003.6 998.4 997.0 998.5 1004.1 1010.5 1014.8 1017.0 1007.9 MAX. QFE PRESSURE IN HPA 1020.6 1017.1 1019.0 1012.0 1009.1 1001.3 1000.2 1003.2 1008.4 1015.9 1018.0 1020.9 1020.9 DAY 13 20 5 21 9 6 23 30 22 27 27 8 MIN. QFE PRESSURE IN HPA 1012.6 1009.8 1006.4 1005.4 997.6 996.3 994.3 995.5 999.5 1006.6 1010.8 1012.6 994.3 DAY 31 2 25 24 29 24 14 7 6 8 7 20 MEAN QNH PRESSURE IN HPA 1016.2 1013.5 1012.9 1008.8 1003.9 998.6 997.2 998.7 1004.4 1010.7 1015.0 1017.2 1008.1 MAX. QNH PRESSURE IN HPA 1020.8 1017.3 1019.2 1012.2 1009.3 1001.5 1000.4 1003.4 1008.6 1016.1 1018.2 1021.1 1021.1 DAY 13 20 5 21 9 6 23 30 22 27 27 8 MIN. QNH PRESSURE IN HPA 1012.8 1010.0 1006.6 1005.6 997.8 996.5 994.5 995.7 999.7 1006.8 1011.0 1012.8 994.5 DAY 31 2 25 24 29 24 14 7 6 8 7 20 MEAN QFF PRESSURE IN HPA 1016.5 1013.8 1013.2 1009.1 1004.1 998.9 997.4 998.9 1004.6 1010.9 1015.3 1017.5 1008.4 MAX. QFF PRESSURE IN HPA 1021.1 1017.6 1019.5 1012.5 1009.6 1001.8 1000.7 1003.7 1008.9 1016.4 1018.5 1021.4 1021.4 DAY 13 20 5 21 9 6 23 30 22 27 27 8 MIN. QFF PRESSURE IN HPA 1013.1 1010.3 1006.9 1005.9 998.1 996.8 994.8 996.0 1000.0 1007.1 1011.3 1013.1 994.8 DAY 31 2 25 24 29 24 14 7 6 8 7 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1015.1 1014.5 1010.3 1005.3 999.6 998.1 999.8 1005.8 1012.1 1016.5 1018.8 1009.5 MAX. QFE PRESSURE IN HPA 1021.9 1019.0 1022.0 1014.2 1010.8 1002.8 1001.3 1005.1 1010.9 1017.3 1019.6 1022.8 1022.8 DAY 13 28 5 21 9 5 24 30 22 26 27 31 MIN. QFE PRESSURE IN HPA 1014.1 1011.4 1007.5 1006.6 999.5 997.3 994.9 996.3 1000.9 1008.1 1012.6 1013.8 994.9 DAY 31 16 24 24 29 24 14 7 6 8 7 5 MEAN QNH PRESSURE IN HPA 1017.9 1015.4 1014.7 1010.5 1005.5 999.8 998.3 1000.1 1006.0 1012.4 1016.8 1019.0 1009.7 MAX. QNH PRESSURE IN HPA 1022.1 1019.2 1022.2 1014.4 1011.0 1003.0 1001.5 1005.3 1011.1 1017.5 1019.8 1023.0 1023.0 DAY 13 28 5 21 9 5 24 30 22 26 27 31 MIN. QNH PRESSURE IN HPA 1014.3 1011.6 1007.7 1006.8 999.7 997.5 995.1 996.5 1001.1 1008.3 1012.8 1014.0 995.1 DAY 31 16 24 24 29 24 14 7 6 8 7 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1014.8 1014.1 1010.1 1005.1 999.5 997.8 999.6 1005.5 1011.5 1015.7 1017.8 1009.0 MAX. QFE PRESSURE IN HPA 1021.0 1019.1 1021.1 1014.1 1010.3 1002.7 1001.0 1004.8 1010.3 1016.7 1018.8 1021.8 1021.8 DAY 13 28 5 21 9 5 24 30 22 26 27 31 MIN. QFE PRESSURE IN HPA 1014.5 1011.2 1006.5 1006.0 999.5 997.1 994.7 996.1 1000.7 1007.5 1011.6 1013.2 994.7 DAY 31 16 24 24 29 24 14 8 6 8 6 5 MEAN QNH PRESSURE IN HPA 1017.0 1015.0 1014.3 1010.3 1005.3 999.7 998.0 999.9 1005.7 1011.8 1015.9 1018.1 1009.2 MAX. QNH PRESSURE IN HPA 1021.2 1019.3 1021.3 1014.3 1010.5 1002.9 1001.2 1005.0 1010.5 1016.9 1019.0 1022.0 1022.0 DAY 13 28 5 21 9 5 24 30 22 26 27 31 MIN. QNH PRESSURE IN HPA 1014.7 1011.4 1006.7 1006.2 999.7 997.3 994.9 996.3 1000.9 1007.7 1011.8 1013.4 994.9 DAY 31 16 24 24 29 24 14 8 6 8 6 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.1 1013.0 1012.0 1008.4 1003.5 998.2 996.2 998.0 1003.5 1009.6 1013.8 1016.1 1007.3 MAX. QFE PRESSURE IN HPA 1019.3 1016.9 1019.1 1012.5 1009.0 1001.7 999.2 1002.9 1008.1 1014.7 1016.7 1020.1 1020.1 DAY 13 28 5 21 9 5 23 30 22 26 26 31 MIN. QFE PRESSURE IN HPA 1012.3 1009.0 1004.7 1004.7 997.6 995.5 993.1 994.3 999.2 1006.0 1009.6 1011.8 993.1 DAY 31 16 24 24 28 27 14 8 5 8 6 27 MEAN QNH PRESSURE IN HPA 1015.4 1013.2 1012.2 1008.6 1003.7 998.4 996.5 998.2 1003.8 1009.9 1014.0 1016.4 1007.5 MAX. QNH PRESSURE IN HPA 1019.5 1017.1 1019.3 1012.7 1009.2 1001.9 999.4 1003.1 1008.3 1014.9 1016.9 1020.3 1020.3 DAY 13 28 5 21 9 5 23 30 22 26 26 31 MIN. QNH PRESSURE IN HPA 1012.5 1009.2 1004.9 1004.9 997.8 995.7 993.3 994.5 999.4 1006.2 1009.8 1012.0 993.3 DAY 31 16 24 24 28 27 14 8 5 8 6 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1015.6 1013.2 1011.8 1008.0 1003.0 997.5 995.6 997.3 1003.3 1009.8 1014.0 1016.5 1007.1 MAX. QFE PRESSURE IN HPA 1019.3 1016.9 1019.1 1011.7 1008.3 1001.0 998.0 1002.1 1008.1 1014.7 1016.8 1020.6 1020.6 DAY 13 28 5 21 8 5 2 30 22 26 17 31 MIN. QFE PRESSURE IN HPA 1012.3 1009.0 1004.8 1004.1 996.9 994.9 992.6 993.5 998.7 1005.7 1009.9 1011.9 992.6 DAY 31 16 23 24 28 27 18 7 6 8 10 19 MEAN QNH PRESSURE IN HPA 1015.8 1013.4 1012.1 1008.3 1003.3 997.7 995.8 997.5 1003.5 1010.0 1014.3 1016.8 1007.4 MAX. QNH PRESSURE IN HPA 1019.5 1017.1 1019.3 1011.9 1008.5 1001.2 998.2 1002.3 1008.3 1014.9 1017.0 1020.8 1020.8 DAY 13 28 5 21 8 5 2 30 22 26 17 31 MIN. QNH PRESSURE IN HPA 1012.5 1009.2 1005.0 1004.3 997.1 995.1 992.8 993.7 998.9 1005.9 1010.1 1012.1 992.8 DAY 31 16 23 24 28 27 18 7 6 8 10 19 MEAN QFF PRESSURE IN HPA 1016.1 1013.7 1012.4 1008.5 1003.5 998.0 996.0 997.7 1003.8 1010.3 1014.6 1017.1 1007.6 MAX. QFF PRESSURE IN HPA 1019.8 1017.4 1019.6 1012.2 1008.8 1001.5 998.5 1002.6 1008.6 1015.2 1017.3 1021.1 1021.1 DAY 13 28 5 21 8 5 2 30 22 26 17 31 MIN. QFF PRESSURE IN HPA 1012.8 1009.5 1005.3 1004.6 997.4 995.4 993.1 994.0 999.2 1006.2 1010.4 1012.4 993.1 DAY 31 16 23 24 28 27 18 7 6 8 10 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.9 20.6 22.4 26.6 31.1 31.9 33.8 34.2 33.1 31.6 27.0 21.4 27.9 MINIMUN AIR TEMPERATURE (C) 17.2 17.2 18.9 22.9 27.3 28.6 30.5 31.2 29.1 27.5 23.2 18.7 24.4 DAYS WITH MINIMUM TEMP. >=21 0 0 3 28 31 30 31 31 30 30 25 5 244 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 10.4 13.0 17.0 19.6 23.8 26.5 28.0 30.0 27.4 25.0 16.0 15.4 10.4 DAY 22 4 10 16 2 23 1 30 11 13 24 23 MAXIMUM AIR TEMPERATURE (C) 23.4 22.8 24.5 29.6 34.8 34.4 36.1 36.1 35.5 34.4 29.4 23.7 30.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 14 31 30 31 31 30 31 14 0 212 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.5 24.6 27.4 33.8 38.8 37.2 40.2 39.6 38.8 42.6 33.5 27.6 42.6 DAY 6 7 26 7 29 1 24 10 23 9 8 1 DIF. BETWEEN (MAX.-MIN.) (C) 6.2 5.6 5.6 6.7 7.5 5.8 5.6 4.9 6.4 6.9 6.2 5.0 6.0 MEAN DAILY TEMP. (MDT) (C) 20.3 20.0 21.7 26.2 31.0 31.5 33.3 33.7 32.3 30.9 26.3 21.2 27.4 COOLING DEG. DAYS(BASE 21 0C) 3.1 5.0 24.3 156.8 311.0 314.7 381.7 393.6 339.1 298.0 158.9 23.3 2409.9 HEATING DEG. DAYS(BASE 18 0C) 3.0 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 4.5 DEWPOINT (MEAN C) 12.0 12.6 15.4 19.9 23.1 26.5 28.5 27.4 26.3 22.8 17.7 13.6 20.5 MIXING RATIO (G/KG) 8.89 9.36 11.20 14.79 18.44 22.45 25.42 23.74 22.04 17.81 12.90 9.84 16.41 VAPOUR PRESSURE (HPA) 14.33 15.04 17.89 23.43 28.90 34.75 39.16 36.74 34.42 28.14 20.60 15.85 25.77 SATURATION DEF. (HPA) 10.60 9.39 9.32 11.65 16.58 12.69 13.64 17.06 16.40 18.78 15.32 9.88 13.44 RELATIVE HUMIDITY (MEAN %) 58 62 66 68 65 74 75 69 69 61 58 62 66 RELATIVE HUMIDITY (MAX. %) 68 75 77 83 83 85 90 84 84 75 68 71 79 RELATIVE HUMIDITY (MIN. %) 51 54 57 55 49 63 62 59 59 51 51 55 56 RELATIVE HUMIDITY (MEAN% 03UTC) 67 71 74 82 80 85 90 83 83 75 65 67 77 RELATIVE HUMIDITY (MEAN% 09UTC) 54 61 62 63 59 71 72 63 65 55 53 59 61 RELATIVE HUMIDITY (MEAN% 15UTC) 56 60 66 66 61 71 67 67 66 62 60 64 64 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.0 13.0 3.7 1.4 0.0 0.0 0.0 0.0 0.0 0.0 27.9 53.5 109.5 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 1 2 4 DAYS WITH PRECIPITATION >= 5 1 1 0 0 0 0 0 0 0 0 1 2 5 DAYS WITH PRECIPITATION >= 1 1 2 2 1 0 0 0 0 0 0 1 5 12 DAYS WITH PRECIPITATION 1 6 3 5 0 0 0 0 0 0 1 8 24 GREATEST DAILY PRECIPITATION 10.0 8.0 2.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 27.9 37.0 37.0 DAY 31 1 16 10 ** ** ** ** ** ** 24 6 DAY WITH THUNDER STORM 0 1 2 4 0 0 0 0 0 0 1 0 8 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 4 12 14 12 11 5 2 5 1 1 7 7 81 WIND DIRECTION (PREVAILING) 315 315 270 270 270 270 90 90 270 270 315 90 270 PREVAILING WIND SPEED(KNOTS) 8.5 15.2 10.5 10.6 10.4 8.4 7.8 10.0 8.1 8.3 11.3 9.6 9.1 PREVAILING WIND PERCENT 17.4 28.6 29.0 38.7 32.9 26.7 21.9 19.4 22.7 31.0 24.5 19.9 22.2 CALMS PERCENT OF WIND 29.7 14.3 11.0 8.0 8.4 11.3 20.6 10.3 18.7 16.8 11.3 23.7 15.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 151 156 1827 VECTOR WIND DIRECTION (MEAN) 313 297 305 292 277 276 163 145 249 277 329 102 285 VECTOR WIND MAGNITUDE(KNOTS) 1.6 3.8 4.7 6.2 4.9 2.7 0.8 2.5 2.0 3.6 1.7 0.6 2.2 WIND STEADINESES (MEAN %) 28.1 40.9 50.0 67.4 61.2 38.6 13.8 35.7 35.1 61.0 23.3 9.4 30.6 WIND SPEED (MEAN KNOTS) 5.7 9.3 9.4 9.2 8.0 7.0 5.8 7.0 5.7 5.9 7.3 6.4 7.2 FASTEST WIND DIRECTION 310 300 290 20 310 300 120 150 90 330 290 180 290 FASTEST WIND SPEED (KNOTS) 29 29 35 31 31 21 21 23 14 16 25 29 35 DAY 21 10 21 10 10 20 29 12 1 10 6 1 DAYS WITH SKY CLEAR (0-2)/8 22 17 17 12 29 28 28 29 28 27 22 15 274 DAYS WITH P.CLOUDY (3-6)/8 8 11 9 13 2 2 3 2 2 4 7 13 76 DAYS WITH CLOUDY (7-8)/8 1 0 5 5 0 0 0 0 0 0 1 3 15 DAYS WITH VISIBILITY =< 2 KM 0 1 2 0 6 10 3 2 1 2 0 1 28 DURATION OF SUNSHINE HOURS 246.6 225.3 260.1 245.6 332.1 346.0 307.0 329.7 305.1 300.9 236.6 210.1 3345.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.1 1015.3 1012.5 1009.1 1005.5 997.8 997.9 1000.2 1006.4 1011.6 1014.9 1018.4 1009.0 MAX. QFE PRESSURE IN HPA 1024.3 1022.5 1017.9 1016.1 1010.1 1006.7 1002.8 1006.1 1011.8 1017.8 1021.4 1023.8 1024.3 DAY-HOUR 1- 6 22- 6 3- 6 15- 6 7- 6 2- 6 31- 6 30- 6 22- 6 20- 6 28- 6 22- 6 MIN. QFE PRESSURE IN HPA 1011.7 1010.2 1007.2 1004.1 1000.5 992.1 992.6 994.6 1001.2 1006.5 1009.5 1013.2 992.1 DAY-HOUR 19-12 1-12 19-12 18-12 31-15 20-12 18-15 4-15 9-12 9-12 7-12 5-12 MEAN QNH PRESSURE IN HPA 1018.3 1015.5 1012.7 1009.3 1005.8 998.0 998.1 1000.4 1006.6 1011.9 1015.1 1018.6 1009.2 MAX. QNH PRESSURE IN HPA 1024.5 1022.7 1018.1 1016.3 1010.3 1006.9 1003.0 1006.3 1012.0 1018.0 1021.6 1024.0 1024.5 DAY-HOUR 1- 6 22- 6 3- 6 15- 6 7- 6 2- 6 31- 6 30- 6 22- 6 20- 6 28- 6 22- 6 MIN. QNH PRESSURE IN HPA 1011.9 1010.4 1007.4 1004.3 1000.7 992.3 992.8 994.8 1001.4 1006.7 1009.7 1013.4 992.3 DAY-HOUR 19-12 1-12 19-12 18-12 31-15 20-12 18-15 4-15 9-12 9-12 7-12 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.1 1015.1 1012.2 1008.7 1005.1 997.8 997.9 1000.1 1006.1 1011.5 1014.8 1018.0 1008.8 MAX. QFE PRESSURE IN HPA 1022.8 1020.5 1016.2 1014.0 1008.7 1005.4 1001.1 1005.0 1010.1 1016.2 1019.6 1021.5 1022.8 DAY 1 22 4 15 7 2 31 30 22 21 28 22 MIN. QFE PRESSURE IN HPA 1012.1 1011.0 1007.4 1004.7 1001.0 992.7 993.3 994.7 1001.6 1006.6 1010.9 1014.0 992.7 DAY 20 16 26 25 31 21 19 5 6 1 8 6 MEAN QNH PRESSURE IN HPA 1018.3 1015.3 1012.4 1008.9 1005.4 998.1 998.1 1000.4 1006.3 1011.7 1015.0 1018.2 1009.0 MAX. QNH PRESSURE IN HPA 1023.0 1020.7 1016.4 1014.2 1008.9 1005.6 1001.3 1005.2 1010.3 1016.4 1019.8 1021.7 1023.0 DAY 1 22 4 15 7 2 31 30 22 21 28 22 MIN. QNH PRESSURE IN HPA 1012.3 1011.2 1007.6 1004.9 1001.2 992.9 993.5 994.9 1001.8 1006.8 1011.1 1014.2 992.9 DAY 20 16 26 25 31 21 19 5 6 1 8 6 MEAN QFF PRESSURE IN HPA 1018.6 1015.6 1012.7 1009.2 1005.6 998.3 998.2 1000.6 1006.6 1012.0 1015.3 1018.5 1009.3 MAX. QFF PRESSURE IN HPA 1023.3 1021.0 1016.7 1014.5 1009.2 1005.9 1001.4 1005.5 1010.6 1016.7 1020.1 1022.0 1023.3 DAY 1 22 4 15 7 2 4 30 22 21 28 22 MIN. QFF PRESSURE IN HPA 1012.6 1011.5 1007.9 1005.2 1001.5 993.2 993.8 995.2 1002.1 1007.1 1011.4 1014.5 993.2 DAY 20 16 26 25 31 21 19 5 6 1 8 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.8 1016.8 1013.9 1010.3 1006.8 998.9 999.0 1001.5 1007.9 1013.2 1016.5 1020.0 1010.4 MAX. QFE PRESSURE IN HPA 1024.3 1022.5 1017.9 1016.1 1010.1 1006.7 1002.8 1006.1 1011.8 1017.8 1021.4 1023.8 1024.3 DAY 1 22 3 15 7 2 31 30 22 20 28 22 MIN. QFE PRESSURE IN HPA 1014.3 1013.3 1010.0 1006.1 1002.7 994.0 994.6 997.0 1003.4 1008.6 1012.2 1016.7 994.0 DAY 20 16 11 18 31 20 19 5 6 1 7 1 MEAN QNH PRESSURE IN HPA 1020.0 1017.0 1014.2 1010.6 1007.0 999.1 999.2 1001.7 1008.2 1013.5 1016.7 1020.3 1010.6 MAX. QNH PRESSURE IN HPA 1024.5 1022.7 1018.1 1016.3 1010.3 1006.9 1003.0 1006.3 1012.0 1018.0 1021.6 1024.0 1024.5 DAY 1 22 3 15 7 2 31 30 22 20 28 22 MIN. QNH PRESSURE IN HPA 1014.5 1013.5 1010.2 1006.3 1002.9 994.2 994.8 997.2 1003.6 1008.8 1012.4 1016.9 994.2 DAY 20 16 11 18 31 20 19 5 6 1 7 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.7 1015.9 1013.4 1010.1 1006.5 998.7 998.8 1001.2 1007.2 1012.2 1015.2 1018.8 1009.7 MAX. QFE PRESSURE IN HPA 1023.2 1021.8 1017.5 1015.3 1009.4 1006.7 1002.2 1005.9 1011.2 1017.2 1019.7 1022.5 1023.2 DAY 1 22 3 15 1 2 31 30 22 20 28 22 MIN. QFE PRESSURE IN HPA 1013.4 1012.6 1009.8 1005.6 1002.4 993.6 993.9 996.6 1002.9 1007.9 1010.7 1014.5 993.6 DAY 20 1 16 25 31 27 19 5 6 8 7 5 MEAN QNH PRESSURE IN HPA 1018.9 1016.2 1013.6 1010.3 1006.7 998.9 999.0 1001.5 1007.5 1012.5 1015.5 1019.0 1010.0 MAX. QNH PRESSURE IN HPA 1023.4 1022.0 1017.7 1015.5 1009.6 1006.9 1002.4 1006.1 1011.4 1017.4 1019.9 1022.7 1023.4 DAY 1 22 3 15 1 2 31 30 22 20 28 22 MIN. QNH PRESSURE IN HPA 1013.6 1012.8 1010.0 1005.8 1002.6 993.8 994.1 996.8 1003.1 1008.1 1010.9 1014.7 993.8 DAY 20 1 16 25 31 27 19 5 6 8 7 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1014.2 1011.5 1008.2 1004.8 997.1 997.1 999.3 1005.3 1010.6 1013.7 1017.4 1008.0 MAX. QFE PRESSURE IN HPA 1020.7 1019.6 1015.9 1013.4 1007.9 1004.7 1000.6 1004.0 1009.4 1015.4 1018.2 1020.8 1020.8 DAY 1 22 3 15 6 2 31 29 22 20 28 22 MIN. QFE PRESSURE IN HPA 1011.7 1010.2 1007.2 1004.1 1000.7 992.1 992.7 995.0 1001.2 1006.5 1009.5 1013.2 992.1 DAY 19 1 19 18 31 20 19 9 9 9 7 5 MEAN QNH PRESSURE IN HPA 1017.0 1014.4 1011.7 1008.4 1005.1 997.3 997.4 999.5 1005.6 1010.8 1014.0 1017.6 1008.2 MAX. QNH PRESSURE IN HPA 1020.9 1019.8 1016.1 1013.6 1008.1 1004.9 1000.8 1004.2 1009.6 1015.6 1018.4 1021.0 1021.0 DAY 1 22 3 15 6 2 31 29 22 20 28 22 MIN. QNH PRESSURE IN HPA 1011.9 1010.4 1007.4 1004.3 1000.9 992.3 992.9 995.2 1001.4 1006.7 1009.7 1013.4 992.3 DAY 19 1 19 18 31 20 19 9 9 9 7 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1014.4 1011.6 1008.2 1004.5 996.7 996.7 998.9 1005.4 1010.8 1014.3 1018.0 1008.1 MAX. QFE PRESSURE IN HPA 1021.2 1019.4 1016.6 1014.0 1007.7 1004.0 1000.2 1003.9 1009.7 1015.2 1018.8 1021.5 1021.5 DAY 1 21 3 15 6 2 31 29 22 21 28 23 MIN. QFE PRESSURE IN HPA 1012.2 1011.0 1007.2 1004.1 1000.5 992.5 992.6 994.6 1001.7 1006.7 1010.2 1014.0 992.5 DAY 19 1 19 18 31 20 18 4 9 8 7 5 MEAN QNH PRESSURE IN HPA 1017.3 1014.6 1011.9 1008.5 1004.7 996.9 996.9 999.1 1005.6 1011.0 1014.5 1018.2 1008.3 MAX. QNH PRESSURE IN HPA 1021.4 1019.6 1016.8 1014.2 1007.9 1004.2 1000.4 1004.1 1009.9 1015.4 1019.0 1021.7 1021.7 DAY 1 21 3 15 6 2 31 29 22 21 28 23 MIN. QNH PRESSURE IN HPA 1012.4 1011.2 1007.4 1004.3 1000.7 992.7 992.8 994.8 1001.9 1006.9 1010.4 1014.2 992.7 DAY 19 1 19 18 31 20 18 4 9 8 7 5 MEAN QFF PRESSURE IN HPA 1017.6 1014.9 1012.2 1008.6 1005.0 997.2 997.1 999.4 1005.9 1011.3 1014.8 1018.5 1008.5 MAX. QFF PRESSURE IN HPA 1021.7 1019.9 1017.1 1014.5 1008.2 1004.5 1000.7 1004.4 1010.2 1015.7 1019.3 1022.0 1022.0 DAY 1 21 3 15 6 2 31 29 22 21 28 23 MIN. QFF PRESSURE IN HPA 1012.7 1011.5 1007.7 1004.6 1001.0 993.0 993.1 995.1 1002.2 1007.2 1010.7 1014.5 993.0 DAY 19 1 19 18 31 20 18 4 9 8 7 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 21.3 22.0 23.3 26.3 30.5 31.9 33.7 34.5 33.1 30.6 27.3 22.8 28.1 MINIMUN AIR TEMPERATURE (C) 17.7 18.5 20.1 22.7 27.1 28.6 30.8 31.8 29.8 27.4 23.2 19.7 24.8 DAYS WITH MINIMUM TEMP. >=21 0 4 9 25 31 30 31 31 30 31 26 6 254 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 16.0 15.4 16.4 18.2 24.6 27.0 29.0 30.4 27.4 24.4 20.0 16.6 15.4 DAY 6 8 29 1 13 16 2 28 30 25 25 31 MAXIMUM AIR TEMPERATURE (C) 23.9 24.2 25.6 29.2 33.0 34.9 35.9 36.7 35.2 32.8 29.8 25.1 30.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 12 30 30 31 31 30 31 17 0 212 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.6 26.2 29.6 36.0 36.0 40.5 39.6 40.2 40.0 36.0 32.6 27.5 40.5 DAY 31 5 12 30 4 26 17 4 6 5 4 28 DIF. BETWEEN (MAX.-MIN.) (C) 6.2 5.7 5.5 6.5 5.9 6.3 5.1 4.9 5.4 5.4 6.6 5.4 5.7 MEAN DAILY TEMP. (MDT) (C) 20.8 21.3 22.9 26.0 30.1 31.8 33.4 34.3 32.5 30.1 26.5 22.4 27.7 COOLING DEG. DAYS(BASE 21 0C) 6.7 14.0 61.3 149.0 280.8 323.3 383.4 411.0 345.5 280.7 164.7 44.7 2465.4 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.2 DEWPOINT (MEAN C) 13.7 15.4 17.4 19.2 24.4 26.1 27.8 27.7 26.3 22.3 18.5 14.2 21.1 MIXING RATIO (G/KG) 9.82 11.11 12.66 14.29 19.60 21.89 24.27 24.19 22.12 17.22 13.67 10.20 16.75 VAPOUR PRESSURE (HPA) 15.85 17.82 20.16 22.67 30.73 33.99 37.50 37.38 34.49 27.23 21.80 16.42 26.34 SATURATION DEF. (HPA) 9.58 8.66 8.67 11.96 13.12 13.65 15.10 17.54 16.18 16.96 14.75 11.55 13.14 RELATIVE HUMIDITY (MEAN %) 63 68 71 67 71 72 72 69 69 62 60 59 67 RELATIVE HUMIDITY (MAX. %) 74 79 83 83 84 85 84 81 81 73 71 68 79 RELATIVE HUMIDITY (MIN. %) 54 58 60 53 58 61 62 59 59 53 52 51 57 RELATIVE HUMIDITY (MEAN% 03UTC) 73 78 81 83 84 82 83 80 80 72 69 66 78 RELATIVE HUMIDITY (MEAN% 09UTC) 58 63 65 61 69 67 69 63 64 58 55 55 62 RELATIVE HUMIDITY (MEAN% 15UTC) 65 68 72 65 70 72 71 68 71 63 64 63 68 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.2 0.0 50.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.0 7.0 60.2 DAYS WITH PRECIPITATION >=10 0 0 2 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 0 0 2 0 0 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 1 0 0 4 0 0 0 0 0 0 0 1 1 6 DAYS WITH PRECIPITATION 2 1 7 0 0 0 0 0 0 0 1 1 12 GREATEST DAILY PRECIPITATION 0.1 0.0 30.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.0 7.0 30.0 DAY 28 ** 30 ** ** ** ** ** ** ** 28 31 DAY WITH THUNDER STORM 0 0 3 0 0 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 4 3 4 3 5 2 5 0 2 0 1 30 WIND DIRECTION (PREVAILING) 270 225 270 225 225 225 180 45 225 45 270 270 225 PREVAILING WIND SPEED(KNOTS) 8.0 7.2 11.3 8.4 8.6 9.4 6.4 10.2 7.1 12.5 8.5 10.5 7.9 PREVAILING WIND PERCENT 34.8 23.6 32.3 34.5 26.6 36.0 21.4 18.1 25.3 25.8 15.3 27.7 21.4 CALMS PERCENT OF WIND 17.4 19.3 11.6 12.2 11.7 12.7 20.8 14.2 20.0 20.0 44.7 25.8 19.2 NO. OF WIND OBSERVATION 155 140 155 148 154 150 154 155 150 155 150 155 1821 VECTOR WIND DIRECTION (MEAN) 274 326 241 241 222 228 193 123 194 34 300 342 239 VECTOR WIND MAGNITUDE(KNOTS) 2.7 0.7 4.3 5.3 2.8 5.1 2.3 1.3 1.8 1.6 1.1 1.9 1.7 WIND STEADINESES (MEAN %) 49.1 10.1 52.4 72.6 44.4 72.9 40.4 20.6 30.0 23.5 28.9 25.0 26.2 WIND SPEED (MEAN KNOTS) 5.5 6.9 8.2 7.3 6.3 7.0 5.7 6.3 6.0 6.8 3.8 7.6 6.5 FASTEST WIND DIRECTION 270 260 260 260 250 270 90 270 270 40 40 30 260 FASTEST WIND SPEED (KNOTS) 27 23 27 33 21 23 17 25 19 21 29 29 33 DAY 30 22 21 22 7 19 28 24 6 16 30 1 DAYS WITH SKY CLEAR (0-2)/8 27 23 17 20 20 28 29 30 29 27 29 20 299 DAYS WITH P.CLOUDY (3-6)/8 3 4 9 7 7 1 2 1 1 4 1 8 48 DAYS WITH CLOUDY (7-8)/8 1 1 5 3 4 1 0 0 0 0 0 3 18 DAYS WITH VISIBILITY =< 2 KM 0 2 0 2 1 3 4 2 0 0 0 0 14 DURATION OF SUNSHINE HOURS 270.7 246.4 212.1 287.1 314.3 317.1 310.3 294.4 287.2 303.4 292.2 243.2 3378.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1019.5 1016.5 1012.0 1011.1 1006.6 1000.5 999.0 999.2 1005.1 1011.8 1014.8 1018.6 1009.6 MAX. QFE PRESSURE IN HPA 1025.0 1022.0 1017.7 1016.1 1011.6 1008.1 1005.6 1005.2 1011.7 1017.3 1021.2 1025.0 1025.0 DAY-HOUR 17- 6 24- 6 2- 6 1- 6 11- 6 1- 6 29- 9 7- 6 30- 6 24- 6 30- 6 2- 6 MIN. QFE PRESSURE IN HPA 1013.4 1010.0 1004.7 1004.4 1001.7 994.0 994.9 994.2 1000.0 1006.0 1009.9 1013.0 994.0 DAY-HOUR 2-12 10-15 14- 3 30-12 29-15 8-15 26-15 13-15 6-15 4-12 10-12 30-12 MEAN QNH PRESSURE IN HPA 1019.7 1016.8 1012.2 1011.3 1006.8 1000.7 999.2 999.4 1005.4 1012.1 1015.0 1018.9 1009.8 MAX. QNH PRESSURE IN HPA 1025.2 1022.2 1017.9 1016.3 1011.8 1008.3 1005.8 1005.4 1011.9 1017.5 1021.4 1025.2 1025.2 DAY-HOUR 17- 6 24- 6 2- 6 1- 6 11- 6 1- 6 29- 9 7- 6 30- 6 24- 6 30- 6 2- 6 MIN. QNH PRESSURE IN HPA 1013.6 1010.2 1004.9 1004.6 1001.9 994.2 995.1 994.4 1000.2 1006.2 1010.1 1013.2 994.2 DAY-HOUR 2-12 10-15 14- 3 30-12 29-15 8-15 26-15 13-15 6-15 4-12 10-12 30-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.1 1016.3 1011.5 1010.6 1006.1 1000.3 999.0 999.3 1005.0 1011.9 1014.7 1018.6 1009.4 MAX. QFE PRESSURE IN HPA 1023.2 1020.4 1016.0 1014.5 1009.8 1006.1 1004.0 1003.7 1009.5 1015.4 1018.7 1023.1 1023.2 DAY 17 1 2 1 12 1 29 7 30 25 30 2 MIN. QFE PRESSURE IN HPA 1014.7 1010.6 1004.7 1005.7 1002.0 996.1 996.6 996.1 1001.0 1007.0 1010.9 1014.8 996.1 DAY 3 18 14 30 29 9 27 25 11 4 11 31 MEAN QNH PRESSURE IN HPA 1019.4 1016.5 1011.8 1010.8 1006.3 1000.5 999.2 999.5 1005.2 1012.1 1014.9 1018.9 1009.6 MAX. QNH PRESSURE IN HPA 1023.4 1020.6 1016.2 1014.7 1010.0 1006.3 1004.2 1003.9 1009.7 1015.6 1018.9 1023.3 1023.4 DAY 17 1 2 1 12 1 29 7 30 25 30 2 MIN. QNH PRESSURE IN HPA 1014.9 1010.8 1004.9 1005.9 1002.2 996.3 996.8 996.3 1001.2 1007.2 1011.1 1015.0 996.3 DAY 3 18 14 30 29 9 27 25 11 4 11 31 MEAN QFF PRESSURE IN HPA 1019.6 1016.8 1012.0 1011.1 1006.6 1000.8 999.5 999.8 1005.5 1012.4 1015.2 1019.1 1009.9 MAX. QFF PRESSURE IN HPA 1023.7 1020.9 1016.5 1015.0 1010.3 1006.6 1004.5 1004.2 1010.0 1015.9 1019.2 1023.6 1023.7 DAY 17 1 25 1 12 1 29 7 30 25 30 2 MIN. QFF PRESSURE IN HPA 1015.2 1011.1 1005.2 1006.2 1002.5 996.6 997.1 996.6 1001.5 1007.5 1011.4 1015.3 996.6 DAY 3 18 14 30 29 9 27 25 11 4 11 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1021.1 1018.1 1013.3 1012.5 1007.7 1001.6 1000.0 1000.5 1006.7 1013.5 1016.4 1020.4 1011.0 MAX. QFE PRESSURE IN HPA 1025.0 1022.0 1017.7 1016.1 1011.6 1008.1 1004.5 1005.2 1011.7 1017.3 1021.2 1025.0 1025.0 DAY 17 24 2 1 11 1 30 7 30 24 30 2 MIN. QFE PRESSURE IN HPA 1017.0 1013.0 1006.9 1007.0 1003.3 997.2 997.6 997.3 1002.3 1008.7 1012.3 1016.7 997.2 DAY 2 18 14 30 29 9 26 13 6 4 10 31 MEAN QNH PRESSURE IN HPA 1021.4 1018.3 1013.6 1012.7 1008.0 1001.8 1000.2 1000.8 1006.9 1013.7 1016.7 1020.7 1011.2 MAX. QNH PRESSURE IN HPA 1025.2 1022.2 1017.9 1016.3 1011.8 1008.3 1004.7 1005.4 1011.9 1017.5 1021.4 1025.2 1025.2 DAY 17 24 2 1 11 1 30 7 30 24 30 2 MIN. QNH PRESSURE IN HPA 1017.2 1013.2 1007.1 1007.2 1003.5 997.4 997.8 997.5 1002.5 1008.9 1012.5 1016.9 997.4 DAY 2 18 14 30 29 9 26 13 6 4 10 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1020.0 1017.4 1013.0 1012.0 1007.6 1001.3 999.8 999.9 1005.9 1012.2 1015.0 1018.8 1010.2 MAX. QFE PRESSURE IN HPA 1024.0 1020.8 1017.0 1015.7 1011.6 1007.7 1005.6 1005.2 1010.6 1015.7 1020.1 1023.8 1024.0 DAY 17 24 16 1 11 1 29 7 30 24 30 2 MIN. QFE PRESSURE IN HPA 1015.2 1012.9 1006.7 1007.0 1003.4 996.7 997.2 996.6 1001.8 1007.6 1011.0 1014.8 996.6 DAY 2 10 13 30 7 9 26 13 6 4 11 30 MEAN QNH PRESSURE IN HPA 1020.3 1017.7 1013.2 1012.2 1007.8 1001.5 1000.0 1000.2 1006.2 1012.4 1015.2 1019.0 1010.5 MAX. QNH PRESSURE IN HPA 1024.2 1021.0 1017.2 1015.9 1011.8 1007.9 1005.8 1005.4 1010.8 1015.9 1020.3 1024.0 1024.2 DAY 17 24 16 1 11 1 29 7 30 24 30 2 MIN. QNH PRESSURE IN HPA 1015.4 1013.1 1006.9 1007.2 1003.6 996.9 997.4 996.8 1002.0 1007.8 1011.2 1015.0 996.8 DAY 2 10 13 30 7 9 26 13 6 4 11 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1015.5 1011.1 1010.2 1006.0 999.9 998.3 998.3 1004.2 1010.7 1013.7 1017.4 1008.6 MAX. QFE PRESSURE IN HPA 1022.0 1019.0 1015.6 1014.0 1010.0 1006.5 1003.2 1002.8 1009.0 1014.4 1018.6 1021.7 1022.0 DAY 17 1 2 1 11 1 29 7 30 24 30 2 MIN. QFE PRESSURE IN HPA 1013.4 1010.6 1005.0 1004.4 1002.0 994.7 995.7 994.7 1000.2 1006.0 1009.9 1013.0 994.7 DAY 2 10 13 30 7 8 26 13 6 4 10 30 MEAN QNH PRESSURE IN HPA 1018.6 1015.7 1011.3 1010.4 1006.2 1000.2 998.5 998.5 1004.4 1010.9 1013.9 1017.6 1008.9 MAX. QNH PRESSURE IN HPA 1022.2 1019.2 1015.8 1014.2 1010.2 1006.7 1003.4 1003.0 1009.2 1014.6 1018.8 1021.9 1022.2 DAY 17 1 2 1 11 1 29 7 30 24 30 2 MIN. QNH PRESSURE IN HPA 1013.6 1010.8 1005.2 1004.6 1002.2 994.9 995.9 994.9 1000.4 1006.2 1010.1 1013.2 994.9 DAY 2 10 13 30 7 8 26 13 6 4 10 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1015.6 1011.1 1010.1 1005.4 999.2 997.8 997.9 1003.9 1011.0 1014.2 1018.0 1008.6 MAX. QFE PRESSURE IN HPA 1022.5 1019.7 1016.0 1014.3 1009.7 1004.7 1002.8 1003.7 1009.5 1014.6 1019.3 1022.2 1022.5 DAY 17 1 2 1 11 1 29 7 30 24 30 1 MIN. QFE PRESSURE IN HPA 1014.1 1010.0 1005.0 1004.4 1001.7 994.0 994.9 994.2 1000.0 1006.0 1010.1 1013.3 994.0 DAY 2 10 13 30 29 8 26 13 6 9 11 30 MEAN QNH PRESSURE IN HPA 1019.1 1015.8 1011.3 1010.3 1005.7 999.5 998.0 998.1 1004.1 1011.2 1014.5 1018.2 1008.8 MAX. QNH PRESSURE IN HPA 1022.7 1019.9 1016.2 1014.5 1009.9 1004.9 1003.0 1003.9 1009.7 1014.8 1019.5 1022.4 1022.7 DAY 17 1 2 1 11 1 29 7 30 24 30 1 MIN. QNH PRESSURE IN HPA 1014.3 1010.2 1005.2 1004.6 1001.9 994.2 995.1 994.4 1000.2 1006.2 1010.3 1013.5 994.2 DAY 2 10 13 30 29 8 26 13 6 9 11 30 MEAN QFF PRESSURE IN HPA 1019.4 1016.1 1011.6 1010.6 1005.9 999.7 998.3 998.4 1004.4 1011.5 1014.7 1018.5 1009.1 MAX. QFF PRESSURE IN HPA 1023.0 1020.2 1016.5 1014.8 1010.2 1005.2 1003.3 1004.2 1010.0 1015.1 1019.8 1022.7 1023.0 DAY 17 1 2 1 11 1 29 7 30 24 30 1 MIN. QFF PRESSURE IN HPA 1014.6 1010.5 1005.5 1004.9 1002.2 994.5 995.4 994.7 1000.5 1006.5 1010.6 1013.8 994.5 DAY 2 10 13 30 29 8 26 13 6 9 11 30 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MINIMUN AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH FREEZING MIN.<= 0 **** **** **** **** **** **** **** **** **** **** **** **** **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** DAY ** ** ** ** ** ** ** ** ** ** ** ** MAXIMUM AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** **** **** **** **** **** **** **** **** **** **** **** TEMPERATURE RECORDS HIGHEST(C)***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** DAY ** ** ** ** ** ** ** ** ** ** ** ** DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAYS WITH PRECIPITATION >=10 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH PRECIPITATION >= 5 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH PRECIPITATION >= 1 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH PRECIPITATION **** **** **** **** **** **** **** **** **** **** **** **** **** GREATEST DAILY PRECIPITATION ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** DAY WITH THUNDER STORM **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH SNOW OR SLEET **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH DUST **** **** **** **** **** **** **** **** **** **** **** **** **** WIND DIRECTION (PREVAILING) *** *** *** *** *** *** *** *** *** *** *** *** *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** **** **** **** **** **** **** **** **** **** PREVAILING WIND PERCENT ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** CALMS PERCENT OF WIND ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** NO. OF WIND OBSERVATION **** **** **** **** **** **** **** **** **** **** **** **** 0 VECTOR WIND DIRECTION (MEAN) *** *** *** *** *** *** *** *** *** *** *** *** *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** **** **** **** **** **** **** **** **** **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** WIND SPEED (MEAN KNOTS) **** **** **** **** **** **** **** **** **** **** **** **** **** FASTEST WIND DIRECTION *** *** *** *** *** *** *** *** *** *** *** *** *** FASTEST WIND SPEED (KNOTS) *** *** *** *** *** *** *** *** *** *** *** *** *** DAY ** ** ** ** ** ** ** ** ** ** ** ** DAYS WITH SKY CLEAR (0-2)/8 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH CLOUDY (7-8)/8 **** **** **** **** **** **** **** **** **** **** **** **** **** DAYS WITH VISIBILITY =< 2 KM **** **** **** **** **** **** **** **** **** **** **** **** **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.2 20.4 22.5 25.0 29.5 32.0 34.1 34.5 32.8 31.4 28.3 22.7 27.8 MINIMUN AIR TEMPERATURE (C) 16.9 17.4 19.4 21.6 25.8 28.4 31.0 31.0 29.4 27.4 24.8 19.5 24.4 DAYS WITH MINIMUM TEMP. >=21 0 2 9 20 30 30 31 31 30 31 30 6 250 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 14.8 14.6 16.4 17.0 22.6 26.8 29.0 30.0 26.2 25.5 21.0 17.4 14.6 DAY 10 6 31 1 4 18 2 13 29 31 30 16 MAXIMUM AIR TEMPERATURE (C) 22.7 22.9 24.9 27.4 32.1 34.7 36.3 36.5 34.8 33.9 31.2 25.3 30.2 DAYS WITH MAXIMUM TEMP. >=30 0 2 0 8 27 30 31 31 30 31 25 0 215 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.6 30.6 28.0 32.2 35.8 41.2 39.0 38.0 36.0 36.2 33.6 29.8 41.2 DAY 23 21 11 22 12 12 27 9 4 15 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 5.8 5.5 5.5 5.8 6.3 6.3 5.3 5.5 5.4 6.5 6.4 5.8 5.8 MEAN DAILY TEMP. (MDT) (C) 19.8 20.1 22.1 24.5 29.0 31.6 33.6 33.7 32.1 30.7 28.0 22.4 27.3 COOLING DEG. DAYS(BASE 21 0C) 6.4 17.2 39.3 106.9 238.5 316.9 391.8 394.8 332.8 299.4 209.2 46.7 2400.1 HEATING DEG. DAYS(BASE 18 0C) 0.5 3.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.1 DEWPOINT (MEAN C) 9.2 11.4 16.2 18.7 22.9 25.4 28.1 28.2 25.8 22.3 18.9 14.6 20.1 MIXING RATIO (G/KG) 7.37 8.64 11.81 13.85 18.05 21.10 24.79 24.88 21.52 17.32 13.86 10.63 16.15 VAPOUR PRESSURE (HPA) 11.90 13.92 18.84 22.00 28.33 32.79 38.21 38.41 33.56 27.35 22.11 17.08 25.37 SATURATION DEF. (HPA) 11.90 10.36 8.60 10.08 13.06 15.14 15.49 16.44 16.34 18.81 16.62 10.75 13.63 RELATIVE HUMIDITY (MEAN %) 50 57 69 70 69 70 72 71 68 60 57 62 65 RELATIVE HUMIDITY (MAX. %) 61 67 80 84 84 83 84 82 81 72 68 71 76 RELATIVE HUMIDITY (MIN. %) 42 48 60 57 59 60 62 61 60 52 51 54 56 RELATIVE HUMIDITY (MEAN% 03UTC) 57 64 79 82 81 83 84 82 81 72 67 68 75 RELATIVE HUMIDITY (MEAN% 09UTC) 44 53 64 63 65 66 70 68 63 55 53 57 60 RELATIVE HUMIDITY (MEAN% 15UTC) 56 59 69 71 68 67 67 67 66 59 58 63 64 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.0 3.0 24.7 2.5 0.0 0.0 0.0 0.0 0.0 0.0 0.3 94.8 125.3 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 3 4 DAYS WITH PRECIPITATION >= 5 0 0 2 0 0 0 0 0 0 0 0 5 7 DAYS WITH PRECIPITATION >= 1 0 2 4 1 0 0 0 0 0 0 0 6 13 DAYS WITH PRECIPITATION 1 4 6 4 0 0 0 0 0 0 1 7 23 GREATEST DAILY PRECIPITATION 0.0 1.0 13.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 46.0 46.0 DAY ** 2 30 29 ** ** ** ** ** ** 10 15 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 1 2 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 4 5 2 5 10 11 3 2 2 5 2 54 WIND DIRECTION (PREVAILING) 270 270 225 225 225 270 90 90 90 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 14.2 12.7 9.8 10.0 8.4 9.6 10.6 11.6 7.6 9.0 11.7 10.7 10.9 PREVAILING WIND PERCENT 39.4 35.0 29.7 35.8 30.3 26.0 25.2 32.3 22.7 27.7 29.3 27.7 24.5 CALMS PERCENT OF WIND 21.9 9.3 14.2 15.9 14.2 26.7 17.4 16.1 16.0 21.9 20.0 18.1 17.7 NO. OF WIND OBSERVATION 155 140 155 151 155 150 155 155 150 155 150 155 1826 VECTOR WIND DIRECTION (MEAN) 260 306 241 231 247 255 123 89 152 277 295 310 260 VECTOR WIND MAGNITUDE(KNOTS) 6.4 3.5 3.8 5.5 3.9 2.5 2.0 2.8 1.0 3.2 3.9 2.9 2.3 WIND STEADINESES (MEAN %) 73.6 37.2 48.7 78.6 55.7 43.1 28.6 31.1 15.6 53.3 46.4 32.2 30.3 WIND SPEED (MEAN KNOTS) 8.7 9.4 7.8 7.0 7.0 5.8 7.0 9.0 6.4 6.0 8.4 9.0 7.6 FASTEST WIND DIRECTION 270 270 240 270 40 300 90 70 60 330 30 20 70 FASTEST WIND SPEED (KNOTS) 33 33 19 21 25 23 19 39 17 17 25 31 39 DAY 25 23 6 29 1 24 8 7 10 28 8 15 DAYS WITH SKY CLEAR (0-2)/8 21 18 19 14 30 29 29 27 30 31 23 14 285 DAYS WITH P.CLOUDY (3-6)/8 10 7 9 7 1 1 2 4 0 0 7 13 61 DAYS WITH CLOUDY (7-8)/8 0 3 3 9 0 0 0 0 0 0 0 4 19 DAYS WITH VISIBILITY =< 2 KM 1 0 6 1 1 6 2 1 4 0 1 2 25 DURATION OF SUNSHINE HOURS 238.5 226.6 238.5 226.0 334.2 307.4 268.1 267.7 290.0 304.3 260.9 203.9 3166.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1017.3 1017.8 1012.4 1011.3 1005.7 999.8 997.4 999.0 1004.5 1011.0 1015.5 1017.2 1009.1 MAX. QFE PRESSURE IN HPA 1022.5 1024.1 1020.3 1020.3 1012.9 1006.0 1002.0 1003.0 1011.8 1018.0 1021.2 1022.0 1024.1 DAY-HOUR 19- 6 8- 6 31- 9 1- 6 3- 6 2- 6 11- 6 31- 6 24- 6 27- 6 27- 6 2- 6 MIN. QFE PRESSURE IN HPA 1014.0 1011.0 1006.6 1003.8 999.4 994.4 993.5 994.1 1000.1 1005.1 1011.4 1013.5 993.5 DAY-HOUR 6-12 22-12 15-12 23-12 27-15 29-15 25-15 1-15 8-12 10-12 4-12 23-12 MEAN QNH PRESSURE IN HPA 1017.6 1018.0 1012.6 1011.5 1005.9 1000.0 997.6 999.2 1004.7 1011.2 1015.7 1017.4 1009.3 MAX. QNH PRESSURE IN HPA 1022.7 1024.3 1020.5 1020.5 1013.1 1006.2 1002.2 1003.2 1012.0 1018.2 1021.4 1022.2 1024.3 DAY-HOUR 19- 6 8- 6 31- 9 1- 6 3- 6 2- 6 11- 6 31- 6 24- 6 27- 6 27- 6 2- 6 MIN. QNH PRESSURE IN HPA 1014.2 1011.2 1006.8 1004.0 999.6 994.6 993.7 994.3 1000.3 1005.3 1011.6 1013.7 993.7 DAY-HOUR 6-12 22-12 15-12 23-12 27-15 29-15 25-15 1-15 8-12 10-12 4-12 23-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.9 1017.4 1012.0 1011.1 1005.5 999.7 997.6 999.2 1004.5 1010.9 1015.4 1017.1 1008.9 MAX. QFE PRESSURE IN HPA 1019.8 1022.6 1017.8 1020.1 1011.2 1004.4 1001.2 1001.2 1010.0 1015.9 1019.6 1020.2 1022.6 DAY 19 8 31 1 5 2 11 26 24 27 30 1 MIN. QFE PRESSURE IN HPA 1014.0 1013.0 1008.8 1004.4 999.9 996.5 994.8 995.2 1001.1 1006.2 1011.6 1014.3 994.8 DAY 25 22 18 23 28 7 26 1 6 11 4 15 MEAN QNH PRESSURE IN HPA 1017.1 1017.6 1012.2 1011.3 1005.7 1000.0 997.8 999.4 1004.7 1011.1 1015.6 1017.3 1009.2 MAX. QNH PRESSURE IN HPA 1020.0 1022.8 1018.0 1020.3 1011.4 1004.6 1001.4 1001.4 1010.2 1016.1 1019.8 1020.4 1022.8 DAY 19 8 31 1 5 2 11 26 24 27 30 1 MIN. QNH PRESSURE IN HPA 1014.2 1013.2 1009.0 1004.6 1000.1 996.7 995.0 995.4 1001.3 1006.4 1011.8 1014.5 995.0 DAY 25 22 18 23 28 7 26 1 6 11 4 15 MEAN QFF PRESSURE IN HPA 1017.4 1017.9 1012.5 1011.6 1006.0 1000.2 998.1 999.7 1005.0 1011.4 1015.9 1017.6 1009.4 MAX. QFF PRESSURE IN HPA 1020.3 1023.1 1018.3 1020.6 1011.7 1004.9 1001.7 1001.7 1010.5 1016.4 1020.1 1020.7 1023.1 DAY 19 8 31 1 5 2 11 26 24 27 30 1 MIN. QFF PRESSURE IN HPA 1014.5 1013.5 1009.3 1004.9 1000.4 997.0 995.3 995.7 1001.6 1006.7 1012.1 1014.8 995.3 DAY 25 22 18 23 28 30 26 1 6 11 4 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.1 1019.4 1013.8 1012.7 1007.0 1001.0 998.6 1000.4 1006.1 1012.6 1017.2 1018.8 1010.6 MAX. QFE PRESSURE IN HPA 1022.5 1024.1 1019.9 1020.3 1012.9 1006.0 1002.0 1003.0 1011.8 1018.0 1021.2 1022.0 1024.1 DAY 19 8 1 1 3 2 11 31 24 27 27 2 MIN. QFE PRESSURE IN HPA 1016.0 1014.7 1010.6 1006.2 1001.7 997.7 995.7 995.9 1002.7 1007.2 1014.0 1015.9 995.7 DAY 25 22 18 23 29 7 24 1 8 11 4 5 MEAN QNH PRESSURE IN HPA 1019.4 1019.6 1014.0 1012.9 1007.2 1001.2 998.8 1000.6 1006.4 1012.8 1017.4 1019.0 1010.8 MAX. QNH PRESSURE IN HPA 1022.7 1024.3 1020.1 1020.5 1013.1 1006.2 1002.2 1003.2 1012.0 1018.2 1021.4 1022.2 1024.3 DAY 19 8 1 1 3 2 11 31 24 27 27 2 MIN. QNH PRESSURE IN HPA 1016.2 1014.9 1010.8 1006.4 1001.9 997.9 995.9 996.1 1002.9 1007.4 1014.2 1016.1 995.9 DAY 25 22 18 23 29 7 24 1 8 11 4 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.8 1018.3 1013.0 1012.1 1006.4 1000.6 998.3 999.7 1005.2 1011.5 1015.6 1017.3 1009.7 MAX. QFE PRESSURE IN HPA 1020.9 1022.9 1020.3 1019.7 1012.2 1005.8 1001.8 1002.5 1010.2 1016.4 1019.3 1020.4 1022.9 DAY 19 8 31 1 4 2 11 31 24 27 30 10 MIN. QFE PRESSURE IN HPA 1015.2 1013.7 1008.9 1005.6 1001.6 997.0 995.4 995.9 1002.0 1006.6 1012.8 1014.0 995.4 DAY 6 22 15 23 27 30 26 1 8 11 4 5 MEAN QNH PRESSURE IN HPA 1018.0 1018.6 1013.2 1012.4 1006.7 1000.9 998.5 999.9 1005.5 1011.7 1015.8 1017.5 1009.9 MAX. QNH PRESSURE IN HPA 1021.1 1023.1 1020.5 1019.9 1012.4 1006.0 1002.0 1002.7 1010.4 1016.6 1019.5 1020.6 1023.1 DAY 19 8 31 1 4 2 11 31 24 27 30 10 MIN. QNH PRESSURE IN HPA 1015.4 1013.9 1009.1 1005.8 1001.8 997.2 995.6 996.1 1002.2 1006.8 1013.0 1014.2 995.6 DAY 6 22 15 23 27 30 26 1 8 11 4 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.2 1016.7 1011.6 1010.4 1004.9 999.0 996.6 998.1 1003.5 1010.0 1014.5 1016.2 1008.2 MAX. QFE PRESSURE IN HPA 1019.0 1021.8 1019.0 1017.3 1010.7 1003.5 1000.1 1000.6 1008.4 1015.1 1018.7 1018.9 1021.8 DAY 19 8 31 1 4 2 10 31 29 27 30 2 MIN. QFE PRESSURE IN HPA 1014.0 1011.0 1006.6 1003.8 999.9 995.4 994.1 994.3 1000.1 1005.1 1011.4 1013.5 994.1 DAY 6 22 15 23 27 7 26 1 8 10 4 23 MEAN QNH PRESSURE IN HPA 1016.5 1017.0 1011.8 1010.6 1005.2 999.3 996.8 998.3 1003.7 1010.3 1014.7 1016.4 1008.4 MAX. QNH PRESSURE IN HPA 1019.2 1022.0 1019.2 1017.5 1010.9 1003.7 1000.3 1000.8 1008.6 1015.3 1018.9 1019.1 1022.0 DAY 19 8 31 1 4 2 10 31 29 27 30 2 MIN. QNH PRESSURE IN HPA 1014.2 1011.2 1006.8 1004.0 1000.1 995.6 994.3 994.5 1000.3 1005.3 1011.6 1013.7 994.3 DAY 6 22 15 23 27 7 26 1 8 10 4 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1017.0 1011.8 1010.3 1004.5 998.4 996.0 997.7 1003.3 1010.1 1014.8 1016.5 1008.1 MAX. QFE PRESSURE IN HPA 1019.2 1021.8 1019.2 1017.0 1010.3 1003.0 999.1 1000.6 1008.4 1015.1 1019.3 1019.4 1021.8 DAY 19 8 31 1 4 2 10 31 29 27 30 18 MIN. QFE PRESSURE IN HPA 1014.9 1011.0 1007.3 1004.2 999.4 994.4 993.5 994.1 1000.1 1005.1 1011.4 1013.9 993.5 DAY 11 22 15 22 27 29 25 1 8 10 4 23 MEAN QNH PRESSURE IN HPA 1016.9 1017.2 1012.0 1010.6 1004.8 998.7 996.2 998.0 1003.6 1010.4 1015.0 1016.8 1008.3 MAX. QNH PRESSURE IN HPA 1019.4 1022.0 1019.4 1017.2 1010.5 1003.2 999.3 1000.8 1008.6 1015.3 1019.5 1019.6 1022.0 DAY 19 8 31 1 4 2 10 31 29 27 30 18 MIN. QNH PRESSURE IN HPA 1015.1 1011.2 1007.5 1004.4 999.6 994.6 993.7 994.3 1000.3 1005.3 1011.6 1014.1 993.7 DAY 11 22 15 22 27 29 25 1 8 10 4 23 MEAN QFF PRESSURE IN HPA 1017.2 1017.5 1012.3 1010.8 1005.0 998.9 996.4 998.2 1003.8 1010.6 1015.3 1017.1 1008.6 MAX. QFF PRESSURE IN HPA 1019.7 1022.3 1019.7 1017.5 1010.8 1003.5 999.6 1001.1 1008.9 1015.6 1019.8 1019.9 1022.3 DAY 19 8 31 1 4 2 10 31 29 27 30 18 MIN. QFF PRESSURE IN HPA 1015.4 1011.5 1007.8 1004.7 999.9 994.9 994.0 994.6 1000.6 1005.6 1011.9 1014.4 994.0 DAY 11 22 15 22 27 29 25 1 8 10 4 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.7 21.3 23.2 26.3 30.4 32.0 34.0 34.2 33.3 31.6 28.3 24.8 28.3 MINIMUN AIR TEMPERATURE (C) 17.9 18.8 19.7 23.0 26.8 28.7 30.7 31.5 30.4 27.6 24.2 21.5 25.1 DAYS WITH MINIMUM TEMP. >=21 2 5 12 24 31 30 31 31 30 31 29 22 278 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 15.2 15.2 16.2 17.8 25.0 26.4 28.4 30.2 28.5 25.6 19.6 15.5 15.2 DAY 23 1 6 1 7 3 7 19 30 29 26 30 MAXIMUM AIR TEMPERATURE (C) 23.2 23.7 25.5 29.2 33.3 34.6 36.5 36.0 35.3 34.5 31.6 27.8 30.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 14 30 30 31 31 29 31 24 2 222 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.0 26.5 29.6 34.6 35.8 37.0 39.6 37.6 36.6 37.8 34.8 30.8 39.6 DAY 10 22 10 29 25 12 11 4 1 5 3 6 DIF. BETWEEN (MAX.-MIN.) (C) 5.3 4.9 5.8 6.2 6.5 5.9 5.8 4.5 4.9 6.9 7.4 6.3 5.8 MEAN DAILY TEMP. (MDT) (C) 20.6 21.2 22.6 26.1 30.1 31.6 33.6 33.8 32.9 31.0 27.9 24.7 28.0 COOLING DEG. DAYS(BASE 21 0C) 12.0 20.4 54.6 153.8 271.0 319.1 389.8 395.8 343.7 311.4 206.2 117.2 2595.3 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DEWPOINT (MEAN C) 12.2 14.6 16.4 19.0 23.6 26.5 27.7 28.7 27.2 22.1 18.9 15.5 21.0 MIXING RATIO (G/KG) 8.99 10.67 11.91 14.11 18.96 22.49 24.37 25.65 23.31 17.04 13.85 11.19 16.88 VAPOUR PRESSURE (HPA) 14.49 17.08 19.04 22.36 29.62 34.84 37.53 39.54 36.23 26.94 22.10 17.96 26.48 SATURATION DEF. (HPA) 10.05 8.42 9.61 12.31 13.94 12.85 15.86 14.33 15.03 19.88 16.59 13.72 13.55 RELATIVE HUMIDITY (MEAN %) 59 67 67 66 69 74 71 74 71 58 58 57 66 RELATIVE HUMIDITY (MAX. %) 69 79 81 81 82 88 85 84 81 71 70 66 78 RELATIVE HUMIDITY (MIN. %) 52 57 57 53 57 63 62 66 65 49 50 49 57 RELATIVE HUMIDITY (MEAN% 03UTC) 67 77 78 78 82 88 84 84 81 70 69 65 77 RELATIVE HUMIDITY (MEAN% 09UTC) 55 63 61 61 65 68 67 70 67 52 53 51 61 RELATIVE HUMIDITY (MEAN% 15UTC) 60 67 69 66 67 72 69 72 71 62 59 60 66 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.4 41.7 0.0 14.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 66.1 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 1 0 1 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 1 1 3 0 3 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION 5 5 0 3 0 0 0 0 0 0 0 0 13 GREATEST DAILY PRECIPITATION 9.0 36.0 0.0 8.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 36.0 DAY 15 10 ** 1 ** ** ** ** ** ** ** ** DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 8 8 3 8 10 3 6 8 0 2 0 11 67 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 90 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 10.9 13.8 13.1 13.6 12.5 10.7 10.4 10.8 7.4 9.4 9.6 10.8 11.4 PREVAILING WIND PERCENT 34.2 27.1 36.8 42.0 29.0 29.3 21.3 25.8 16.0 21.9 17.3 25.8 26.2 CALMS PERCENT OF WIND 14.2 5.7 15.5 6.0 18.7 24.7 32.9 24.5 33.3 34.8 42.0 20.0 22.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 297 322 290 275 279 249 261 90 175 288 312 292 283 VECTOR WIND MAGNITUDE(KNOTS) 5.0 2.9 4.4 6.8 5.7 4.5 2.6 2.3 0.8 2.4 1.7 4.1 3.0 WIND STEADINESES (MEAN %) 52.1 25.4 42.3 58.1 62.0 67.2 46.4 33.8 17.0 37.5 33.3 48.2 37.5 WIND SPEED (MEAN KNOTS) 9.6 11.4 10.4 11.7 9.2 6.7 5.6 6.8 4.7 6.4 5.1 8.5 8.0 FASTEST WIND DIRECTION 320 280 310 300 300 260 310 80 270 80 300 300 300 FASTEST WIND SPEED (KNOTS) 25 27 27 23 29 19 29 23 16 25 17 27 29 DAY 30 16 3 18 13 10 3 16 2 19 1 28 DAYS WITH SKY CLEAR (0-2)/8 13 20 22 19 27 30 29 30 30 31 28 25 304 DAYS WITH P.CLOUDY (3-6)/8 15 6 7 8 4 0 1 1 0 0 2 5 49 DAYS WITH CLOUDY (7-8)/8 3 2 2 3 0 0 1 0 0 0 0 1 12 DAYS WITH VISIBILITY =< 2 KM 1 2 3 3 6 10 10 1 0 0 0 0 36 DURATION OF SUNSHINE HOURS 213.0 214.3 260.9 245.8 192.4 ****** ****** ****** 181.7 293.0 ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.1 1014.0 1014.0 1009.1 1002.6 999.1 996.1 998.8 1003.1 1011.3 1015.4 1016.5 1008.2 MAX. QFE PRESSURE IN HPA 1024.7 1021.4 1019.5 1014.6 1007.3 1004.6 1001.0 1003.3 1008.8 1016.8 1021.0 1022.6 1024.7 DAY-HOUR 20- 6 1- 6 8- 6 8- 6 7- 6 2- 6 15- 6 29- 6 27- 6 30- 6 14- 6 29- 6 MIN. QFE PRESSURE IN HPA 1013.5 1008.9 1008.5 1003.4 997.8 993.4 992.0 994.0 996.7 1005.0 1005.5 1011.3 992.0 DAY-HOUR 17-12 23-12 26-12 30-15 30-15 30-15 1-15 14-12 3-15 1-12 1-12 9-12 MEAN QNH PRESSURE IN HPA 1018.3 1014.2 1014.2 1009.3 1002.8 999.3 996.3 999.0 1003.3 1011.5 1015.6 1016.7 1008.4 MAX. QNH PRESSURE IN HPA 1024.9 1021.6 1019.7 1014.8 1007.5 1004.8 1001.2 1003.5 1009.0 1017.0 1021.2 1022.8 1024.9 DAY-HOUR 20- 6 1- 6 8- 6 8- 6 7- 6 2- 6 15- 6 29- 6 27- 6 30- 6 14- 6 29- 6 MIN. QNH PRESSURE IN HPA 1013.7 1009.1 1008.7 1003.6 998.0 993.6 992.2 994.2 996.9 1005.2 1005.7 1011.5 992.2 DAY-HOUR 17-12 23-12 26-12 30-15 30-15 30-15 1-15 14-12 3-15 1-12 1-12 9-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.0 1013.8 1013.6 1008.6 1002.4 999.0 996.0 998.8 1003.2 1011.2 1015.3 1016.5 1008.0 MAX. QFE PRESSURE IN HPA 1022.7 1019.9 1018.1 1014.5 1005.0 1003.3 1000.0 1002.0 1007.0 1015.0 1019.5 1020.5 1022.7 DAY 20 1 8 1 8 2 15 29 26 20 24 5 MIN. QFE PRESSURE IN HPA 1014.4 1010.0 1009.5 1004.0 998.3 995.0 992.0 995.2 998.5 1006.5 1006.8 1012.2 992.0 DAY 18 23 26 16 30 20 2 14 5 1 1 15 MEAN QNH PRESSURE IN HPA 1018.2 1014.0 1013.8 1008.9 1002.6 999.2 996.2 999.0 1003.5 1011.4 1015.6 1016.7 1008.3 MAX. QNH PRESSURE IN HPA 1022.9 1020.1 1018.3 1014.7 1005.2 1003.5 1000.2 1002.2 1007.2 1015.2 1019.7 1020.7 1022.9 DAY 20 1 8 1 8 2 15 29 26 20 24 5 MIN. QNH PRESSURE IN HPA 1014.6 1010.2 1009.7 1004.2 998.5 995.2 992.2 995.4 998.7 1006.7 1007.0 1012.4 992.2 DAY 18 23 26 16 30 20 2 14 5 1 1 15 MEAN QFF PRESSURE IN HPA 1018.5 1014.3 1014.1 1009.1 1002.9 999.5 996.4 999.3 1003.7 1011.7 1015.8 1017.0 1008.5 MAX. QFF PRESSURE IN HPA 1023.2 1020.4 1018.6 1015.0 1005.5 1003.8 1000.5 1002.5 1007.5 1015.5 1020.0 1021.0 1023.2 DAY 20 1 8 1 8 2 15 29 27 20 24 5 MIN. QFF PRESSURE IN HPA 1014.9 1010.5 1010.0 1004.5 998.8 995.5 992.5 995.7 999.0 1007.0 1007.3 1012.7 992.5 DAY 18 23 26 16 30 27 2 14 5 1 1 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.9 1015.7 1015.5 1010.5 1004.1 1000.3 997.1 1000.2 1004.7 1013.0 1017.1 1018.3 1009.7 MAX. QFE PRESSURE IN HPA 1024.7 1021.4 1019.5 1014.6 1007.3 1004.6 1001.0 1003.3 1008.8 1016.8 1021.0 1022.6 1024.7 DAY 20 1 8 8 7 2 15 29 27 30 14 29 MIN. QFE PRESSURE IN HPA 1016.4 1011.7 1011.2 1005.3 1000.0 995.7 992.9 996.8 1000.0 1008.0 1008.4 1014.2 992.9 DAY 17 23 26 16 30 20 2 14 5 1 1 9 MEAN QNH PRESSURE IN HPA 1020.1 1015.9 1015.7 1010.7 1004.3 1000.5 997.3 1000.4 1004.9 1013.2 1017.3 1018.5 1009.9 MAX. QNH PRESSURE IN HPA 1024.9 1021.6 1019.7 1014.8 1007.5 1004.8 1001.2 1003.5 1009.0 1017.0 1021.2 1022.8 1024.9 DAY 20 1 8 8 7 2 15 29 27 30 14 29 MIN. QNH PRESSURE IN HPA 1016.6 1011.9 1011.4 1005.5 1000.2 995.9 993.1 997.0 1000.2 1008.2 1008.6 1014.4 993.1 DAY 17 23 26 16 30 20 2 14 5 1 1 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1014.6 1014.7 1010.0 1003.6 999.9 996.8 999.5 1003.8 1011.8 1015.6 1016.8 1008.8 MAX. QFE PRESSURE IN HPA 1023.0 1019.6 1019.2 1014.6 1006.4 1004.0 1000.2 1002.4 1007.7 1015.2 1020.0 1020.8 1023.0 DAY 20 1 1 8 7 3 15 29 27 21 14 5 MIN. QFE PRESSURE IN HPA 1015.3 1011.0 1010.5 1004.6 999.7 995.0 992.9 995.7 999.2 1006.7 1006.8 1012.7 992.9 DAY 28 23 26 16 30 30 2 14 3 1 1 9 MEAN QNH PRESSURE IN HPA 1018.7 1014.9 1014.9 1010.2 1003.8 1000.1 997.0 999.7 1004.0 1012.0 1015.9 1017.0 1009.0 MAX. QNH PRESSURE IN HPA 1023.2 1019.8 1019.4 1014.8 1006.6 1004.2 1000.4 1002.6 1007.9 1015.4 1020.2 1021.0 1023.2 DAY 20 1 1 8 7 3 15 29 27 21 14 5 MIN. QNH PRESSURE IN HPA 1015.5 1011.2 1010.7 1004.8 999.9 995.2 993.1 995.9 999.4 1006.9 1007.0 1012.9 993.1 DAY 28 23 26 16 30 30 2 14 3 1 1 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.9 1012.8 1012.9 1008.4 1001.8 998.4 995.5 997.8 1002.0 1010.2 1014.2 1015.3 1007.2 MAX. QFE PRESSURE IN HPA 1020.8 1017.5 1017.7 1011.9 1004.5 1002.5 999.0 1000.2 1006.3 1014.0 1018.2 1019.0 1020.8 DAY 20 1 1 1 7 3 8 28 27 21 14 5 MIN. QFE PRESSURE IN HPA 1013.5 1008.9 1008.5 1004.0 998.0 993.7 992.0 994.0 997.3 1005.0 1005.5 1011.3 992.0 DAY 17 23 26 16 30 30 2 14 3 1 1 9 MEAN QNH PRESSURE IN HPA 1017.1 1013.1 1013.1 1008.6 1002.0 998.6 995.7 998.0 1002.2 1010.5 1014.4 1015.5 1007.4 MAX. QNH PRESSURE IN HPA 1021.0 1017.7 1017.9 1012.1 1004.7 1002.7 999.2 1000.4 1006.5 1014.2 1018.4 1019.2 1021.0 DAY 20 1 1 1 7 3 8 28 27 21 14 5 MIN. QNH PRESSURE IN HPA 1013.7 1009.1 1008.7 1004.2 998.2 993.9 992.2 994.2 997.5 1005.2 1005.7 1011.5 992.2 DAY 17 23 26 16 30 30 2 14 3 1 1 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1017.3 1013.1 1013.1 1008.1 1001.3 998.0 995.0 997.5 1001.8 1010.4 1014.7 1015.6 1007.2 MAX. QFE PRESSURE IN HPA 1021.2 1017.9 1018.8 1011.9 1003.9 1002.4 998.6 999.7 1006.2 1014.0 1019.0 1019.5 1021.2 DAY 19 1 8 8 7 3 14 28 27 21 14 5 MIN. QFE PRESSURE IN HPA 1014.4 1008.9 1008.5 1003.4 997.8 993.4 992.0 994.0 996.7 1005.4 1006.2 1012.0 992.0 DAY 2 23 26 30 30 30 1 14 3 1 1 9 MEAN QNH PRESSURE IN HPA 1017.6 1013.4 1013.4 1008.3 1001.5 998.2 995.3 997.7 1002.0 1010.7 1015.0 1015.8 1007.4 MAX. QNH PRESSURE IN HPA 1021.4 1018.1 1019.0 1012.1 1004.1 1002.6 998.8 999.9 1006.4 1014.2 1019.2 1019.7 1021.4 DAY 19 1 8 8 7 3 14 28 27 21 14 5 MIN. QNH PRESSURE IN HPA 1014.6 1009.1 1008.7 1003.6 998.0 993.6 992.2 994.2 996.9 1005.6 1006.4 1012.2 992.2 DAY 2 23 26 30 30 30 1 14 3 1 1 9 MEAN QFF PRESSURE IN HPA 1017.8 1013.7 1013.6 1008.6 1001.8 998.5 995.5 998.0 1002.3 1010.9 1015.2 1016.1 1007.7 MAX. QFF PRESSURE IN HPA 1021.7 1018.4 1019.3 1012.4 1004.4 1002.9 999.1 1000.2 1006.7 1014.5 1019.5 1020.0 1021.7 DAY 19 1 8 8 7 3 14 28 27 21 14 5 MIN. QFF PRESSURE IN HPA 1014.9 1009.4 1009.0 1003.9 998.3 993.9 992.5 994.5 997.2 1005.9 1006.7 1012.5 992.5 DAY 2 23 26 30 30 30 2 14 3 1 1 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 21.9 21.3 22.5 26.2 28.0 30.2 32.5 32.9 32.0 29.9 26.8 23.2 27.3 MINIMUN AIR TEMPERATURE (C) 19.2 18.9 19.9 23.1 24.7 27.1 29.7 30.7 29.4 26.5 22.9 20.3 24.4 DAYS WITH MINIMUM TEMP. >=21 7 7 11 30 30 30 31 31 30 31 28 13 279 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 15.6 15.2 16.6 21.0 20.0 25.0 26.6 28.8 25.6 23.5 18.0 16.5 15.2 DAY 17 12 8 15 8 1 1 23 30 26 24 19 MAXIMUM AIR TEMPERATURE (C) 24.3 24.0 24.4 28.6 30.5 32.4 34.4 34.5 33.9 32.0 29.6 25.8 29.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 20 29 30 31 30 31 16 0 191 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.8 27.6 28.0 32.0 33.6 37.6 37.6 36.2 37.6 34.6 32.6 29.0 37.6 DAY 21 1 27 26 18 25 7 8 21 6 3 11 DIF. BETWEEN (MAX.-MIN.) (C) 5.1 5.1 4.5 5.5 5.8 5.3 4.7 3.8 4.5 5.5 6.7 5.5 5.1 MEAN DAILY TEMP. (MDT) (C) 21.8 21.4 22.2 25.9 27.6 29.7 32.1 32.6 31.6 29.3 26.2 23.0 26.9 COOLING DEG. DAYS(BASE 21 0C) 32.7 24.3 40.9 146.2 198.2 261.8 332.5 359.5 318.9 255.8 156.5 67.0 2194.5 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DEWPOINT (MEAN C) 14.5 13.0 16.9 20.8 21.1 25.5 28.1 28.9 26.7 24.2 17.1 16.3 21.1 MIXING RATIO (G/KG) 10.59 9.76 12.29 15.74 16.04 21.11 24.75 25.96 22.50 19.37 12.32 11.89 16.86 VAPOUR PRESSURE (HPA) 17.00 15.68 19.60 24.89 25.26 32.79 38.11 39.98 35.08 30.51 19.72 19.04 26.47 SATURATION DEF. (HPA) 9.32 9.86 7.82 9.34 12.71 10.37 10.82 10.17 12.62 11.92 15.70 9.62 10.86 RELATIVE HUMIDITY (MEAN %) 64 61 72 73 67 77 78 80 74 73 56 66 70 RELATIVE HUMIDITY (MAX. %) 73 69 83 84 79 88 90 90 84 84 68 77 81 RELATIVE HUMIDITY (MIN. %) 57 54 63 64 58 67 70 73 65 64 47 58 62 RELATIVE HUMIDITY (MEAN% 03UTC) 70 68 82 83 77 88 89 89 83 84 65 71 79 RELATIVE HUMIDITY (MEAN% 09UTC) 60 56 66 69 61 72 74 77 69 68 50 62 65 RELATIVE HUMIDITY (MEAN% 15UTC) 66 62 72 72 70 76 77 79 75 73 62 71 71 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 19.7 7.7 33.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17.5 101.6 180.0 DAYS WITH PRECIPITATION >=10 1 0 1 0 0 0 0 0 0 0 1 4 7 DAYS WITH PRECIPITATION >= 5 1 1 1 0 0 0 0 0 0 0 2 5 10 DAYS WITH PRECIPITATION >= 1 4 1 4 0 0 0 0 0 0 0 2 5 16 DAYS WITH PRECIPITATION 10 6 7 0 0 0 0 0 0 0 4 6 33 GREATEST DAILY PRECIPITATION 14.0 7.0 28.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 39.0 39.0 DAY 15 22 6 ** ** ** ** ** ** ** 24 4 DAY WITH THUNDER STORM 2 0 3 0 0 0 0 0 0 0 0 4 9 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 5 6 10 14 8 3 7 6 4 4 4 74 WIND DIRECTION (PREVAILING) 90 315 270 270 270 45 270 90 90 90 270 90 270 PREVAILING WIND SPEED(KNOTS) 14.0 12.7 12.7 11.5 13.0 7.7 9.5 10.4 9.4 11.7 8.5 11.4 11.1 PREVAILING WIND PERCENT 20.1 22.9 26.0 21.3 44.5 16.0 16.1 34.2 21.3 14.8 20.0 24.5 17.5 CALMS PERCENT OF WIND 16.2 16.4 20.7 17.3 14.8 30.7 42.6 23.9 26.7 40.0 42.7 28.4 26.8 NO. OF WIND OBSERVATION 154 140 150 150 155 150 155 155 150 155 150 155 1819 VECTOR WIND DIRECTION (MEAN) 13 15 330 281 273 253 232 74 155 113 282 72 309 VECTOR WIND MAGNITUDE(KNOTS) 1.4 2.6 2.0 4.0 8.1 1.1 1.7 5.3 1.0 0.7 2.7 2.2 0.9 WIND STEADINESES (MEAN %) 14.4 23.9 20.6 53.3 80.2 19.3 39.5 72.6 14.9 14.9 56.3 26.8 12.0 WIND SPEED (MEAN KNOTS) 9.7 10.9 9.7 7.5 10.1 5.7 4.3 7.3 6.7 4.7 4.8 8.2 7.5 FASTEST WIND DIRECTION 300 300 290 300 300 280 270 70 290 100 300 60 100 FASTEST WIND SPEED (KNOTS) 27 29 37 31 29 19 19 23 19 43 19 27 43 DAY 6 9 7 13 25 4 4 15 26 15 7 3 DAYS WITH SKY CLEAR (0-2)/8 14 13 13 18 29 30 31 31 30 31 25 16 281 DAYS WITH P.CLOUDY (3-6)/8 11 9 12 9 2 0 0 0 0 0 4 13 60 DAYS WITH CLOUDY (7-8)/8 6 6 5 3 0 0 0 0 0 0 1 2 23 DAYS WITH VISIBILITY =< 2 KM 0 0 0 2 7 8 6 2 9 3 0 0 37 DURATION OF SUNSHINE HOURS ****** 191.6 185.1 248.5 279.0 296.6 291.5 280.3 236.6 263.9 262.1 191.0 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1016.8 1016.6 1012.6 1009.2 1005.1 999.3 996.3 998.1 1005.3 1011.1 1015.9 1016.4 1008.6 MAX. QFE PRESSURE IN HPA 1023.5 1027.1 1019.7 1015.1 1010.1 1005.6 1002.4 1003.0 1012.5 1017.0 1021.2 1022.2 1027.1 DAY-HOUR 13- 6 16- 6 18- 6 18- 6 8- 6 22- 6 1- 6 31- 6 29- 6 17- 6 14- 6 6- 6 MIN. QFE PRESSURE IN HPA 1006.9 1007.0 1005.9 1004.0 999.8 993.8 991.8 993.5 999.2 1006.0 1010.0 1011.9 991.8 DAY-HOUR 25-12 28-15 24- 3 27-12 28-12 19-15 14-15 1-15 3-15 8-15 5-15 19-12 MEAN QNH PRESSURE IN HPA 1017.1 1016.8 1012.8 1009.4 1005.3 999.6 996.5 998.3 1005.5 1011.3 1016.1 1016.7 1008.8 MAX. QNH PRESSURE IN HPA 1023.7 1027.3 1019.9 1015.3 1010.3 1005.8 1002.6 1003.2 1012.7 1017.2 1021.4 1022.4 1027.3 DAY-HOUR 13- 6 16- 6 18- 6 18- 6 8- 6 22- 6 1- 6 31- 6 29- 6 17- 6 14- 6 6- 6 MIN. QNH PRESSURE IN HPA 1007.1 1007.2 1006.1 1004.2 1000.0 994.0 992.0 993.7 999.4 1006.2 1010.2 1012.1 992.0 DAY-HOUR 25-12 28-15 24- 3 27-12 28-12 19-15 14-15 1-15 3-15 8-15 5-15 19-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1016.5 1012.2 1009.0 1005.2 999.7 997.0 998.5 1005.5 1011.3 1016.1 1016.3 1008.7 MAX. QFE PRESSURE IN HPA 1021.6 1024.3 1018.3 1013.4 1008.9 1005.0 1002.0 1001.9 1011.2 1015.3 1019.9 1019.1 1024.3 DAY 28 16 18 18 8 1 2 31 30 17 27 11 MIN. QFE PRESSURE IN HPA 1008.8 1009.0 1005.9 1005.0 1000.0 995.7 993.6 994.8 1001.2 1008.1 1011.2 1013.3 993.6 DAY 25 8 24 28 28 20 31 1 3 5 6 19 MEAN QNH PRESSURE IN HPA 1017.1 1016.7 1012.4 1009.3 1005.4 1000.0 997.2 998.7 1005.8 1011.5 1016.3 1016.5 1008.9 MAX. QNH PRESSURE IN HPA 1021.8 1024.5 1018.5 1013.6 1009.1 1005.2 1002.2 1002.1 1011.4 1015.5 1020.1 1019.3 1024.5 DAY 28 16 18 18 8 1 2 31 30 17 27 11 MIN. QNH PRESSURE IN HPA 1009.0 1009.2 1006.1 1005.2 1000.2 995.9 993.8 995.0 1001.4 1008.3 1011.4 1013.5 993.8 DAY 25 8 24 28 28 20 31 1 3 5 6 19 MEAN QFF PRESSURE IN HPA 1017.3 1017.0 1012.6 1009.5 1005.7 1000.2 997.5 999.0 1006.0 1011.7 1016.6 1016.8 1009.2 MAX. QFF PRESSURE IN HPA 1022.1 1024.8 1018.8 1013.9 1009.4 1005.5 1002.5 1002.4 1011.7 1015.8 1020.4 1019.6 1024.8 DAY 28 16 18 18 8 1 2 31 30 17 27 11 MIN. QFF PRESSURE IN HPA 1009.3 1009.5 1006.4 1005.5 1000.5 996.2 994.1 995.3 1001.7 1008.6 1011.7 1013.8 994.1 DAY 25 8 24 28 28 20 31 1 3 5 6 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1018.6 1018.4 1014.1 1010.8 1006.4 1000.5 997.7 999.6 1007.0 1012.8 1017.7 1018.3 1010.2 MAX. QFE PRESSURE IN HPA 1023.5 1027.1 1019.7 1015.1 1010.1 1005.6 1002.4 1003.0 1012.5 1017.0 1021.2 1022.2 1027.1 DAY 13 16 18 18 8 22 1 31 29 17 14 6 MIN. QFE PRESSURE IN HPA 1010.4 1011.2 1008.0 1006.3 1001.3 996.3 994.5 996.0 1002.0 1009.7 1013.1 1015.1 994.5 DAY 25 8 24 28 28 12 14 1 3 5 6 19 MEAN QNH PRESSURE IN HPA 1018.8 1018.7 1014.3 1011.0 1006.7 1000.7 998.0 999.8 1007.2 1013.1 1018.0 1018.5 1010.4 MAX. QNH PRESSURE IN HPA 1023.7 1027.3 1019.9 1015.3 1010.3 1005.8 1002.6 1003.2 1012.7 1017.2 1021.4 1022.4 1027.3 DAY 13 16 18 18 8 22 1 31 29 17 14 6 MIN. QNH PRESSURE IN HPA 1010.6 1011.4 1008.2 1006.5 1001.5 996.5 994.7 996.2 1002.2 1009.9 1013.3 1015.3 994.7 DAY 25 8 24 28 28 12 14 1 3 5 6 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.0 1017.3 1013.4 1010.0 1005.9 1000.0 997.0 998.9 1005.9 1011.5 1016.2 1016.7 1009.2 MAX. QFE PRESSURE IN HPA 1021.4 1025.6 1018.9 1014.4 1009.5 1005.0 1002.0 1002.3 1011.7 1015.6 1019.7 1021.5 1025.6 DAY 12 16 18 18 8 22 1 31 30 17 14 6 MIN. QFE PRESSURE IN HPA 1009.3 1009.8 1008.4 1006.0 1001.0 995.6 994.0 995.7 1001.0 1008.5 1011.6 1013.1 994.0 DAY 25 8 23 27 28 19 14 1 3 13 6 2 MEAN QNH PRESSURE IN HPA 1017.2 1017.5 1013.6 1010.2 1006.1 1000.2 997.2 999.1 1006.2 1011.8 1016.5 1017.0 1009.4 MAX. QNH PRESSURE IN HPA 1021.6 1025.8 1019.1 1014.6 1009.7 1005.2 1002.2 1002.5 1011.9 1015.8 1019.9 1021.7 1025.8 DAY 12 16 18 18 8 22 1 31 30 17 14 6 MIN. QNH PRESSURE IN HPA 1009.5 1010.0 1008.6 1006.2 1001.2 995.8 994.2 995.9 1001.2 1008.7 1011.8 1013.3 994.2 DAY 25 8 23 27 28 19 14 1 3 13 6 2 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.7 1015.4 1011.6 1008.1 1004.2 998.5 995.2 997.0 1004.2 1010.0 1014.8 1015.4 1007.5 MAX. QFE PRESSURE IN HPA 1020.7 1023.7 1016.9 1012.0 1007.5 1003.6 1000.3 1000.9 1010.0 1014.3 1018.0 1018.7 1023.7 DAY 28 15 18 18 8 22 1 31 29 18 13 6 MIN. QFE PRESSURE IN HPA 1006.9 1008.0 1006.8 1004.0 999.8 994.3 992.2 994.0 999.5 1006.6 1010.5 1011.9 992.2 DAY 25 8 24 27 28 19 14 1 3 14 6 19 MEAN QNH PRESSURE IN HPA 1015.9 1015.7 1011.8 1008.3 1004.4 998.7 995.4 997.3 1004.4 1010.3 1015.0 1015.6 1007.7 MAX. QNH PRESSURE IN HPA 1020.9 1023.9 1017.1 1012.2 1007.7 1003.8 1000.5 1001.1 1010.2 1014.5 1018.2 1018.9 1023.9 DAY 28 15 18 18 8 22 1 31 29 18 13 6 MIN. QNH PRESSURE IN HPA 1007.1 1008.2 1007.0 1004.2 1000.0 994.5 992.4 994.2 999.7 1006.8 1010.7 1012.1 992.4 DAY 25 8 24 27 28 19 14 1 3 14 6 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1016.2 1015.5 1011.8 1008.0 1003.7 998.0 994.7 996.5 1003.8 1009.9 1014.7 1015.5 1007.4 MAX. QFE PRESSURE IN HPA 1021.4 1023.7 1016.5 1012.4 1007.0 1003.0 1000.0 1000.9 1009.6 1014.2 1018.1 1019.3 1023.7 DAY 28 15 18 17 8 22 1 31 29 17 18 7 MIN. QFE PRESSURE IN HPA 1007.5 1007.0 1006.8 1004.0 999.8 993.8 991.8 993.5 999.2 1006.0 1010.0 1012.0 991.8 DAY 25 28 24 27 28 19 14 1 3 8 5 19 MEAN QNH PRESSURE IN HPA 1016.4 1015.7 1012.0 1008.3 1003.9 998.2 995.0 996.8 1004.0 1010.1 1015.0 1015.7 1007.6 MAX. QNH PRESSURE IN HPA 1021.6 1023.9 1016.7 1012.6 1007.2 1003.2 1000.2 1001.1 1009.8 1014.4 1018.3 1019.5 1023.9 DAY 28 15 18 17 8 22 1 31 29 17 18 7 MIN. QNH PRESSURE IN HPA 1007.7 1007.2 1007.0 1004.2 1000.0 994.0 992.0 993.7 999.4 1006.2 1010.2 1012.2 992.0 DAY 25 28 24 27 28 19 14 1 3 8 5 19 MEAN QFF PRESSURE IN HPA 1016.7 1016.0 1012.3 1008.5 1004.2 998.5 995.2 997.0 1004.3 1010.3 1015.3 1016.0 1007.9 MAX. QFF PRESSURE IN HPA 1021.9 1024.2 1017.0 1012.9 1007.5 1003.5 1000.5 1001.4 1010.1 1014.7 1018.6 1019.8 1024.2 DAY 28 15 18 17 8 22 1 31 29 17 18 7 MIN. QFF PRESSURE IN HPA 1008.0 1007.5 1007.3 1004.5 1000.3 994.3 992.3 994.0 999.7 1006.5 1010.5 1012.5 992.3 DAY 25 28 25 27 28 19 14 1 3 8 5 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 18.9 19.3 20.3 24.0 30.0 31.7 32.3 33.5 ***** ***** 27.9 23.0 ***** MINIMUN AIR TEMPERATURE (C) 16.7 16.6 17.5 21.0 26.4 28.1 29.1 30.2 ***** ***** 22.6 19.8 ***** DAYS WITH MINIMUM TEMP. >=21 1 0 1 15 31 30 31 31 **** **** 26 9 **** DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 **** **** 0 0 **** DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 **** **** 0 0 **** TEMPERATURE RECORDS LOWEST(C) 13.6 13.0 14.0 17.4 23.4 26.4 27.4 28.5 ***** ***** 20.4 16.4 ***** DAY 6 14 1 6 1 15 15 19 ** ** 23 24 MAXIMUM AIR TEMPERATURE (C) 21.2 21.7 22.5 26.4 33.2 34.9 34.6 35.8 ***** ***** 31.7 25.3 ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 28 30 31 31 **** **** 25 0 **** DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 **** **** 0 0 **** TEMPERATURE RECORDS HIGHEST(C) 26.0 24.0 27.0 31.6 40.0 39.4 38.0 38.0 ***** ***** 34.6 29.8 ***** DAY 2 5 18 27 20 10 21 14 ** ** 7 1 DIF. BETWEEN (MAX.-MIN.) (C) 4.5 5.1 5.0 5.4 6.8 6.8 5.5 5.6 ***** ***** 9.1 5.5 ***** MEAN DAILY TEMP. (MDT) (C) 19.0 19.2 20.0 23.7 29.8 31.5 31.8 33.0 ***** ***** 27.2 22.6 ***** COOLING DEG. DAYS(BASE 21 0C) 8.1 2.1 8.0 80.0 272.1 314.4 336.1 371.0 ****** ****** 185.1 52.3 ****** HEATING DEG. DAYS(BASE 18 0C) 11.6 6.8 1.0 0.0 0.0 0.0 0.0 0.0 ****** ****** 0.0 0.0 ****** DEWPOINT (MEAN C) 10.5 11.5 13.1 18.5 21.6 26.0 27.3 27.6 ***** ***** 17.6 15.3 ***** MIXING RATIO (G/KG) 8.23 8.89 9.71 13.59 16.78 21.80 23.58 23.86 ****** ****** 12.74 10.99 ****** VAPOUR PRESSURE (HPA) 13.29 14.30 15.58 21.60 26.40 33.84 36.43 36.93 ****** ****** 20.38 17.64 ****** SATURATION DEF. (HPA) 8.69 8.18 8.35 8.52 16.55 13.19 11.92 14.86 ****** ****** 17.52 10.57 ****** RELATIVE HUMIDITY (MEAN %) 60 63 65 72 64 73 76 72 *** *** 55 63 *** RELATIVE HUMIDITY (MAX. %) 69 74 75 84 77 87 88 85 *** *** 67 72 *** RELATIVE HUMIDITY (MIN. %) 52 53 56 63 51 62 66 62 *** *** 44 56 *** RELATIVE HUMIDITY (MEAN% 03UTC) 63 71 74 82 71 87 88 85 *** *** 65 68 *** RELATIVE HUMIDITY (MEAN% 09UTC) 56 59 60 68 60 68 73 68 *** *** 47 59 *** RELATIVE HUMIDITY (MEAN% 15UTC) 64 64 65 73 66 72 75 70 *** *** 60 66 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.1 50.6 0.6 1.1 0.0 0.0 0.0 0.0 ****** ****** 0.0 86.6 ****** DAYS WITH PRECIPITATION >=10 1 2 0 0 0 0 0 0 **** **** 0 3 **** DAYS WITH PRECIPITATION >= 5 2 2 0 0 0 0 0 0 **** **** 0 4 **** DAYS WITH PRECIPITATION >= 1 8 4 0 1 0 0 0 0 **** **** 0 6 **** DAYS WITH PRECIPITATION 11 5 1 2 0 0 0 0 **** **** 0 9 **** GREATEST DAILY PRECIPITATION 12.0 24.0 0.6 1.0 0.0 0.0 0.0 0.0 ****** ****** 0.0 30.4 ****** DAY 13 4 20 4 ** ** ** ** ** ** ** 23 DAY WITH THUNDER STORM 2 1 0 0 1 0 0 0 **** **** 0 4 **** DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 **** **** 0 0 **** DAYS WITH DUST 9 13 4 8 9 9 6 4 **** **** 4 2 **** WIND DIRECTION (PREVAILING) 315 315 270 270 270 270 270 270 *** *** 315 315 *** PREVAILING WIND SPEED(KNOTS) 12.7 16.9 13.2 13.5 11.7 11.9 11.1 8.4 **** **** 10.2 10.5 **** PREVAILING WIND PERCENT 33.5 31.7 38.7 28.0 21.9 36.7 24.5 17.4 ***** ***** 22.0 23.2 ***** CALMS PERCENT OF WIND 9.7 11.0 7.7 18.0 14.2 11.3 21.3 25.2 ***** ***** 30.7 16.8 ***** NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 **** **** 150 155 1525 VECTOR WIND DIRECTION (MEAN) 314 308 291 277 278 250 253 194 *** *** 321 301 *** VECTOR WIND MAGNITUDE(KNOTS) 3.7 5.6 6.3 5.4 4.8 6.9 4.2 0.5 **** **** 2.1 1.8 **** WIND STEADINESES (MEAN %) 32.2 44.8 57.3 57.4 50.5 75.8 60.9 9.1 ***** ***** 35.0 19.1 ***** WIND SPEED (MEAN KNOTS) 11.5 12.5 11.0 9.4 9.5 9.1 6.9 5.5 **** **** 6.0 9.4 **** FASTEST WIND DIRECTION 180 300 300 300 280 290 270 120 *** *** 70 300 *** FASTEST WIND SPEED (KNOTS) 29 31 29 29 29 27 27 17 *** *** 23 39 *** DAY 3 11 10 19 26 27 25 6 ** ** 18 18 DAYS WITH SKY CLEAR (0-2)/8 10 20 13 19 20 29 31 29 **** **** 21 8 **** DAYS WITH P.CLOUDY (3-6)/8 14 6 12 10 10 1 0 2 **** **** 8 20 **** DAYS WITH CLOUDY (7-8)/8 7 3 6 1 1 0 0 0 **** **** 1 3 **** DAYS WITH VISIBILITY =< 2 KM 1 3 2 2 5 6 18 9 **** **** 1 0 **** DURATION OF SUNSHINE HOURS 161.2 198.0 146.0 249.3 284.8 317.3 241.4 284.5 ****** ****** 254.3 178.3 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.9 1016.6 1015.1 1010.8 1006.2 1000.0 997.6 999.6 ****** ****** 1015.8 1017.1 ****** MAX. QFE PRESSURE IN HPA 1026.0 1023.4 1022.6 1015.7 1012.1 1007.1 1004.6 1003.4 ****** ****** 1021.5 1022.5 ****** DAY-HOUR 5- 6 13- 6 13- 6 12- 6 14- 6 2- 6 6- 6 7- 6 **-** **-** 29- 6 12- 6 MIN. QFE PRESSURE IN HPA 1013.0 1011.0 1008.3 1004.3 1001.2 993.2 992.3 994.7 ****** ****** 1011.0 1012.1 ****** DAY-HOUR 2-15 10-15 30-12 18-12 20-15 28-15 19-15 18-15 **-** **-** 15-12 19-15 MEAN QNH PRESSURE IN HPA 1019.2 1016.8 1015.4 1011.0 1006.4 1000.2 997.8 999.8 ****** ****** 1016.1 1017.3 ****** MAX. QNH PRESSURE IN HPA 1026.2 1023.6 1022.8 1015.9 1012.3 1007.3 1004.8 1003.6 ****** ****** 1021.7 1022.7 ****** DAY-HOUR 5- 6 13- 6 13- 6 12- 6 14- 6 2- 6 6- 6 7- 6 **-** **-** 29- 6 12- 6 MIN. QNH PRESSURE IN HPA 1013.2 1011.2 1008.5 1004.5 1001.4 993.4 992.5 994.9 ****** ****** 1011.2 1012.3 ****** DAY-HOUR 2-15 10-15 30-12 18-12 20-15 28-15 19-15 18-15 **-** **-** 15-12 19-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1016.5 1014.9 1010.5 1006.0 999.9 997.7 999.9 ****** ****** 1016.0 1017.1 ****** MAX. QFE PRESSURE IN HPA 1024.0 1021.9 1020.2 1014.3 1010.6 1005.8 1003.7 1002.6 ****** ****** 1020.0 1020.9 ****** DAY 5 13 13 21 14 2 6 7 ** ** 24 12 MIN. QFE PRESSURE IN HPA 1014.6 1012.8 1009.2 1005.1 1002.2 993.5 993.6 996.7 ****** ****** 1012.0 1012.7 ****** DAY 3 11 31 18 27 28 19 2 ** ** 17 3 MEAN QNH PRESSURE IN HPA 1019.1 1016.8 1015.1 1010.7 1006.2 1000.1 998.0 1000.1 ****** ****** 1016.2 1017.3 ****** MAX. QNH PRESSURE IN HPA 1024.2 1022.1 1020.4 1014.5 1010.8 1006.0 1003.9 1002.8 ****** ****** 1020.2 1021.1 ****** DAY 5 13 13 21 14 2 6 7 ** ** 24 12 MIN. QNH PRESSURE IN HPA 1014.8 1013.0 1009.4 1005.3 1002.4 993.7 993.8 996.9 ****** ****** 1012.2 1012.9 ****** DAY 3 11 31 18 27 28 19 2 ** ** 17 3 MEAN QFF PRESSURE IN HPA 1019.4 1017.1 1015.4 1011.0 1006.5 1000.4 998.3 1000.4 ****** ****** 1016.5 1017.6 ****** MAX. QFF PRESSURE IN HPA 1024.5 1022.4 1020.7 1014.8 1011.1 1006.3 1004.2 1003.1 ****** ****** 1020.5 1021.4 ****** DAY 5 13 13 21 14 2 6 7 ** ** 24 12 MIN. QFF PRESSURE IN HPA 1015.1 1013.3 1009.7 1005.6 1002.7 994.0 994.1 997.2 ****** ****** 1012.5 1013.2 ****** DAY 3 11 31 18 27 28 19 18 ** ** 17 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1020.7 1018.3 1016.6 1012.3 1007.5 1001.0 998.8 1001.1 ****** ****** 1017.6 1019.0 ****** MAX. QFE PRESSURE IN HPA 1026.0 1023.4 1022.6 1015.7 1012.1 1007.1 1004.6 1003.4 ****** ****** 1021.5 1022.5 ****** DAY 5 13 13 12 14 2 6 7 ** ** 29 12 MIN. QFE PRESSURE IN HPA 1016.0 1014.8 1009.7 1006.8 1003.0 994.6 995.0 997.5 ****** ****** 1013.5 1014.9 ****** DAY 21 18 31 18 27 28 19 1 ** ** 17 3 MEAN QNH PRESSURE IN HPA 1021.0 1018.5 1016.8 1012.5 1007.7 1001.2 999.1 1001.3 ****** ****** 1017.9 1019.2 ****** MAX. QNH PRESSURE IN HPA 1026.2 1023.6 1022.8 1015.9 1012.3 1007.3 1004.8 1003.6 ****** ****** 1021.7 1022.7 ****** DAY 5 13 13 12 14 2 6 7 ** ** 29 12 MIN. QNH PRESSURE IN HPA 1016.2 1015.0 1009.9 1007.0 1003.2 994.8 995.2 997.7 ****** ****** 1013.7 1015.1 ****** DAY 21 18 31 18 27 28 19 1 ** ** 17 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.3 1017.3 1015.9 1011.7 1007.0 1000.8 998.3 1000.5 ****** ****** 1016.2 1017.3 ****** MAX. QFE PRESSURE IN HPA 1025.1 1022.3 1021.6 1015.5 1011.7 1006.7 1003.9 1002.6 ****** ****** 1020.8 1020.8 ****** DAY 5 13 13 12 14 2 6 7 ** ** 29 11 MIN. QFE PRESSURE IN HPA 1014.9 1013.6 1010.7 1007.1 1002.5 995.0 994.5 997.0 ****** ****** 1012.2 1013.4 ****** DAY 21 4 31 18 27 27 19 18 ** ** 17 22 MEAN QNH PRESSURE IN HPA 1019.6 1017.5 1016.2 1011.9 1007.2 1001.0 998.5 1000.7 ****** ****** 1016.4 1017.6 ****** MAX. QNH PRESSURE IN HPA 1025.3 1022.5 1021.8 1015.7 1011.9 1006.9 1004.1 1002.8 ****** ****** 1021.0 1021.0 ****** DAY 5 13 13 12 14 2 6 7 ** ** 29 11 MIN. QNH PRESSURE IN HPA 1015.1 1013.8 1010.9 1007.3 1002.7 995.2 994.7 997.2 ****** ****** 1012.4 1013.6 ****** DAY 21 4 31 18 27 27 19 18 ** ** 17 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1015.5 1014.1 1009.9 1005.5 999.5 996.9 998.7 ****** ****** 1014.8 1016.0 ****** MAX. QFE PRESSURE IN HPA 1023.7 1020.5 1019.8 1014.0 1009.9 1005.5 1001.9 1000.9 ****** ****** 1019.2 1019.7 ****** DAY 5 13 13 12 14 2 6 7 ** ** 29 11 MIN. QFE PRESSURE IN HPA 1013.2 1011.7 1008.3 1004.3 1001.7 993.7 993.1 995.0 ****** ****** 1011.0 1012.3 ****** DAY 21 10 30 18 27 27 19 18 ** ** 15 19 MEAN QNH PRESSURE IN HPA 1018.2 1015.8 1014.4 1010.1 1005.8 999.7 997.1 999.0 ****** ****** 1015.0 1016.3 ****** MAX. QNH PRESSURE IN HPA 1023.9 1020.7 1020.0 1014.2 1010.1 1005.7 1002.1 1001.1 ****** ****** 1019.4 1019.9 ****** DAY 5 13 13 12 14 2 6 7 ** ** 29 11 MIN. QNH PRESSURE IN HPA 1013.4 1011.9 1008.5 1004.5 1001.9 993.9 993.3 995.2 ****** ****** 1011.2 1012.5 ****** DAY 21 10 30 18 27 27 19 18 ** ** 15 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1018.0 1015.4 1014.2 1009.8 1005.1 998.9 996.2 998.1 ****** ****** 1014.7 1016.1 ****** MAX. QFE PRESSURE IN HPA 1023.2 1020.5 1019.2 1013.3 1009.9 1005.3 1001.2 1000.7 ****** ****** 1019.2 1020.0 ****** DAY 6 13 13 12 14 2 6 7 ** ** 29 28 MIN. QFE PRESSURE IN HPA 1013.0 1011.0 1008.3 1005.6 1001.2 993.2 992.3 994.7 ****** ****** 1011.0 1012.1 ****** DAY 2 10 30 23 20 28 19 18 ** ** 15 19 MEAN QNH PRESSURE IN HPA 1018.2 1015.6 1014.4 1010.0 1005.3 999.2 996.4 998.3 ****** ****** 1015.0 1016.3 ****** MAX. QNH PRESSURE IN HPA 1023.4 1020.7 1019.4 1013.5 1010.1 1005.5 1001.4 1000.9 ****** ****** 1019.4 1020.2 ****** DAY 6 13 13 12 14 2 6 7 ** ** 29 28 MIN. QNH PRESSURE IN HPA 1013.2 1011.2 1008.5 1005.8 1001.4 993.4 992.5 994.9 ****** ****** 1011.2 1012.3 ****** DAY 2 10 30 23 20 28 19 18 ** ** 15 19 MEAN QFF PRESSURE IN HPA 1018.5 1015.9 1014.7 1010.3 1005.6 999.4 996.7 998.5 ****** ****** 1015.2 1016.6 ****** MAX. QFF PRESSURE IN HPA 1023.7 1021.0 1019.7 1013.8 1010.4 1005.8 1001.7 1001.2 ****** ****** 1019.7 1020.5 ****** DAY 6 13 13 12 14 2 6 7 ** ** 29 28 MIN. QFF PRESSURE IN HPA 1013.5 1011.5 1008.8 1006.1 1001.7 993.7 992.8 995.2 ****** ****** 1011.5 1012.6 ****** DAY 2 10 30 23 20 28 19 18 ** ** 15 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.2 20.9 22.8 26.2 29.8 31.4 33.5 34.5 33.4 30.9 28.2 24.2 28.0 MINIMUN AIR TEMPERATURE (C) 17.2 17.3 19.5 22.1 26.4 28.1 30.8 31.5 30.4 27.9 24.5 20.8 24.7 DAYS WITH MINIMUM TEMP. >=21 1 0 12 22 31 30 31 31 30 31 30 14 263 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 13.0 13.4 16.4 19.0 23.6 26.4 27.0 28.6 28.6 25.0 22.4 17.2 13.0 DAY 16 9 25 6 2 17 2 26 14 24 26 25 MAXIMUM AIR TEMPERATURE (C) 22.8 23.2 24.7 29.1 32.6 34.0 35.7 36.5 35.2 32.7 31.6 26.7 30.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 8 25 30 31 31 30 31 28 0 214 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.6 27.6 29.0 36.0 38.5 38.0 40.0 40.0 36.6 35.6 34.6 28.6 40.0 DAY 9 22 20 24 25 30 30 12 11 2 5 2 DIF. BETWEEN (MAX.-MIN.) (C) 5.6 5.9 5.2 7.0 6.2 5.9 4.9 5.0 4.8 4.8 7.1 5.9 5.7 MEAN DAILY TEMP. (MDT) (C) 20.0 20.2 22.1 25.6 29.5 31.0 33.3 34.0 32.8 30.3 28.0 23.8 27.6 COOLING DEG. DAYS(BASE 21 0C) 14.3 11.9 43.5 137.9 262.5 301.4 381.0 402.8 355.2 288.8 211.4 86.4 2497.4 HEATING DEG. DAYS(BASE 18 0C) 5.4 6.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.8 DEWPOINT (MEAN C) 12.9 15.0 16.1 18.3 22.7 26.3 28.7 28.1 27.6 22.9 18.9 16.0 21.1 MIXING RATIO (G/KG) 9.55 10.91 11.78 13.50 17.92 22.12 25.71 24.77 23.88 17.78 14.06 11.38 16.95 VAPOUR PRESSURE (HPA) 15.37 17.49 18.82 21.46 28.12 34.34 39.55 38.29 37.10 28.11 22.39 18.27 26.61 SATURATION DEF. (HPA) 8.54 7.47 9.07 13.05 14.30 11.91 12.43 16.41 14.39 16.69 16.04 12.14 12.70 RELATIVE HUMIDITY (MEAN %) 64 70 68 64 68 75 77 71 73 63 58 61 68 RELATIVE HUMIDITY (MAX. %) 72 81 79 80 82 86 88 82 85 74 70 72 79 RELATIVE HUMIDITY (MIN. %) 56 61 58 51 55 65 68 61 64 55 50 53 58 RELATIVE HUMIDITY (MEAN% 03UTC) 69 80 77 79 80 85 87 80 84 71 69 70 78 RELATIVE HUMIDITY (MEAN% 09UTC) 60 65 62 57 64 74 74 66 68 59 53 57 63 RELATIVE HUMIDITY (MEAN% 15UTC) 66 70 69 65 67 73 75 70 71 63 59 62 68 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 1.1 87.8 1.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 101.5 DAYS WITH PRECIPITATION >=10 0 4 0 0 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 5 0 4 0 0 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 1 0 5 1 0 0 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION 5 9 3 1 0 0 0 0 0 0 0 1 19 GREATEST DAILY PRECIPITATION 0.7 42.5 1.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 42.5 DAY 5 5 26 ** ** ** ** ** ** ** ** 25 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 3 7 6 14 5 2 3 0 0 3 2 48 WIND DIRECTION (PREVAILING) 270 315 270 270 270 270 270 225 225 90 270 270 270 PREVAILING WIND SPEED(KNOTS) 12.3 9.7 12.8 12.1 10.9 9.5 9.0 6.5 5.7 9.7 9.7 8.5 10.5 PREVAILING WIND PERCENT 37.3 23.6 34.8 34.0 34.2 30.7 16.8 21.3 19.3 27.7 18.7 23.2 24.2 CALMS PERCENT OF WIND 4.6 24.3 11.0 16.0 13.5 18.0 31.6 23.9 35.3 32.9 40.0 40.0 24.2 NO. OF WIND OBSERVATION 153 140 155 150 155 150 155 155 150 155 150 155 1823 VECTOR WIND DIRECTION (MEAN) 309 293 282 276 268 246 229 213 198 74 297 305 274 VECTOR WIND MAGNITUDE(KNOTS) 4.2 2.9 3.2 6.1 5.9 4.9 0.9 1.2 1.7 2.1 1.6 1.6 2.3 WIND STEADINESES (MEAN %) 37.5 41.4 34.8 75.3 73.7 71.0 17.6 21.1 38.6 38.9 33.3 33.3 34.3 WIND SPEED (MEAN KNOTS) 11.2 7.0 9.2 8.1 8.0 6.9 5.1 5.7 4.4 5.4 4.8 4.8 6.7 FASTEST WIND DIRECTION 290 300 270 280 300 280 250 20 100 60 300 60 280 FASTEST WIND SPEED (KNOTS) 31 29 29 33 29 19 19 21 14 23 19 19 33 DAY 14 17 11 14 24 3 10 13 3 9 7 8 DAYS WITH SKY CLEAR (0-2)/8 10 13 21 16 27 30 28 29 30 26 28 24 282 DAYS WITH P.CLOUDY (3-6)/8 19 10 8 11 3 0 3 2 0 5 2 7 70 DAYS WITH CLOUDY (7-8)/8 2 5 2 3 1 0 0 0 0 0 0 0 13 DAYS WITH VISIBILITY =< 2 KM 0 1 1 3 5 4 11 1 1 0 2 0 29 DURATION OF SUNSHINE HOURS 168.4 187.4 248.5 252.0 320.9 353.5 301.8 324.7 289.5 285.1 272.0 245.4 3249.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.1 1016.4 1013.8 1011.0 1005.6 1000.3 996.8 1000.1 1004.1 1012.3 1014.4 1017.3 1009.2 MAX. QFE PRESSURE IN HPA 1025.9 1025.8 1017.8 1016.8 1011.6 1004.4 1002.1 1005.7 1010.1 1017.3 1020.5 1024.1 1025.9 DAY-HOUR 27- 6 7- 6 24- 6 1- 6 10- 6 1- 6 26- 6 8- 6 30- 6 17- 6 24- 6 26- 6 MIN. QFE PRESSURE IN HPA 1011.0 1007.8 1007.1 1006.0 996.2 995.5 992.7 993.5 999.0 1005.9 1009.0 1011.4 992.7 DAY-HOUR 8-12 4-15 12-15 23-15 30- 3 12-15 14-12 12-15 1-15 3-15 5-12 4-15 MEAN QNH PRESSURE IN HPA 1018.3 1016.6 1014.0 1011.2 1005.8 1000.5 997.0 1000.3 1004.3 1012.6 1014.6 1017.5 1009.4 MAX. QNH PRESSURE IN HPA 1026.1 1026.0 1018.0 1017.0 1011.8 1004.6 1002.3 1005.9 1010.3 1017.5 1020.7 1024.3 1026.1 DAY-HOUR 27- 6 7- 6 24- 6 1- 6 10- 6 1- 6 26- 6 8- 6 30- 6 17- 6 24- 6 26- 6 MIN. QNH PRESSURE IN HPA 1011.2 1008.0 1007.3 1006.2 996.4 995.7 992.9 993.7 999.2 1006.1 1009.2 1011.6 992.9 DAY-HOUR 8-12 4-15 12-15 23-15 30- 3 12-15 14-12 12-15 1-15 3-15 5-12 4-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1016.4 1013.5 1010.8 1005.2 1000.2 997.0 1000.1 1004.1 1012.3 1014.3 1017.4 1009.1 MAX. QFE PRESSURE IN HPA 1024.4 1023.4 1015.9 1014.5 1010.1 1002.9 1000.9 1004.5 1008.0 1016.0 1018.5 1022.4 1024.4 DAY 27 7 19 1 9 2 26 8 30 17 24 26 MIN. QFE PRESSURE IN HPA 1011.1 1010.6 1007.4 1007.0 996.2 996.9 993.2 995.5 1001.3 1007.1 1009.8 1012.7 993.2 DAY 9 23 10 12 30 26 14 12 1 3 6 4 MEAN QNH PRESSURE IN HPA 1018.1 1016.6 1013.7 1011.0 1005.5 1000.4 997.2 1000.4 1004.3 1012.6 1014.6 1017.6 1009.3 MAX. QNH PRESSURE IN HPA 1024.6 1023.6 1016.1 1014.7 1010.3 1003.1 1001.1 1004.7 1008.2 1016.2 1018.7 1022.6 1024.6 DAY 27 7 19 1 9 2 26 8 30 17 24 26 MIN. QNH PRESSURE IN HPA 1011.3 1010.8 1007.6 1007.2 996.4 997.1 993.4 995.7 1001.5 1007.3 1010.0 1012.9 993.4 DAY 9 23 10 12 30 26 14 12 1 3 6 4 MEAN QFF PRESSURE IN HPA 1018.4 1016.9 1014.0 1011.3 1005.7 1000.7 997.4 1000.6 1004.6 1012.8 1014.8 1017.9 1009.6 MAX. QFF PRESSURE IN HPA 1024.9 1023.9 1016.4 1015.0 1010.6 1003.4 1001.4 1005.0 1008.5 1016.5 1019.0 1022.9 1024.9 DAY 27 7 19 2 9 2 28 8 30 17 24 26 MIN. QFF PRESSURE IN HPA 1011.6 1011.1 1007.9 1007.5 996.7 997.4 993.7 996.0 1001.8 1007.6 1010.3 1013.2 993.7 DAY 9 23 10 25 30 26 14 12 1 3 6 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.8 1018.2 1015.5 1012.4 1006.8 1001.5 997.9 1001.5 1005.7 1014.1 1016.2 1019.1 1010.7 MAX. QFE PRESSURE IN HPA 1025.9 1025.8 1017.8 1016.8 1011.6 1004.4 1002.1 1005.7 1010.1 1017.3 1020.5 1024.1 1025.9 DAY 27 7 24 1 10 1 26 8 30 17 24 26 MIN. QFE PRESSURE IN HPA 1014.0 1011.6 1009.8 1008.8 997.9 998.0 994.2 996.7 1002.9 1008.5 1012.2 1014.7 994.2 DAY 9 23 10 12 30 12 14 12 1 3 5 4 MEAN QNH PRESSURE IN HPA 1020.0 1018.4 1015.8 1012.7 1007.0 1001.7 998.2 1001.7 1005.9 1014.3 1016.4 1019.3 1010.9 MAX. QNH PRESSURE IN HPA 1026.1 1026.0 1018.0 1017.0 1011.8 1004.6 1002.3 1005.9 1010.3 1017.5 1020.7 1024.3 1026.1 DAY 27 7 24 1 10 1 26 8 30 17 24 26 MIN. QNH PRESSURE IN HPA 1014.2 1011.8 1010.0 1009.0 998.1 998.2 994.4 996.9 1003.1 1008.7 1012.4 1014.9 994.4 DAY 9 23 10 12 30 12 14 12 1 3 5 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1016.9 1014.6 1011.9 1006.3 1001.2 997.5 1000.8 1004.9 1012.8 1014.7 1017.5 1009.8 MAX. QFE PRESSURE IN HPA 1024.5 1024.6 1017.0 1016.0 1011.0 1003.9 1001.4 1005.1 1009.4 1015.9 1019.3 1022.9 1024.6 DAY 26 7 29 1 10 1 27 8 30 29 25 26 MIN. QFE PRESSURE IN HPA 1012.8 1011.3 1009.3 1007.3 997.9 997.3 993.6 996.3 1001.8 1007.5 1010.5 1012.4 993.6 DAY 9 3 10 26 30 13 14 12 1 3 5 4 MEAN QNH PRESSURE IN HPA 1018.8 1017.2 1014.8 1012.1 1006.6 1001.4 997.7 1001.0 1005.1 1013.0 1014.9 1017.7 1010.0 MAX. QNH PRESSURE IN HPA 1024.7 1024.8 1017.2 1016.2 1011.2 1004.1 1001.6 1005.3 1009.6 1016.1 1019.5 1023.1 1024.8 DAY 26 7 29 1 10 1 27 8 30 29 25 26 MIN. QNH PRESSURE IN HPA 1013.0 1011.5 1009.5 1007.5 998.1 997.5 993.8 996.5 1002.0 1007.7 1010.7 1012.6 993.8 DAY 9 3 10 26 30 13 14 12 1 3 5 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1015.3 1012.7 1010.2 1005.0 999.6 996.1 999.2 1003.2 1011.3 1013.4 1016.2 1008.3 MAX. QFE PRESSURE IN HPA 1023.0 1023.0 1015.0 1014.3 1010.3 1002.4 1000.0 1003.2 1008.4 1014.6 1017.8 1021.2 1023.0 DAY 26 7 29 1 13 1 27 7 30 29 24 26 MIN. QFE PRESSURE IN HPA 1011.0 1009.7 1007.4 1006.5 997.3 996.1 992.7 994.3 1000.0 1006.1 1009.0 1011.6 992.7 DAY 8 4 12 24 30 12 14 12 1 3 5 4 MEAN QNH PRESSURE IN HPA 1017.4 1015.5 1013.0 1010.4 1005.3 999.9 996.3 999.4 1003.4 1011.5 1013.6 1016.5 1008.5 MAX. QNH PRESSURE IN HPA 1023.2 1023.2 1015.2 1014.5 1010.5 1002.6 1000.2 1003.4 1008.6 1014.8 1018.0 1021.4 1023.2 DAY 26 7 29 1 13 1 27 7 30 29 24 26 MIN. QNH PRESSURE IN HPA 1011.2 1009.9 1007.6 1006.7 997.5 996.3 992.9 994.5 1000.2 1006.3 1009.2 1011.8 992.9 DAY 8 4 12 24 30 12 14 12 1 3 5 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1017.2 1015.1 1012.6 1009.7 1004.5 999.1 995.4 998.7 1002.8 1011.2 1013.3 1016.1 1008.0 MAX. QFE PRESSURE IN HPA 1023.0 1023.0 1015.0 1013.3 1009.0 1002.1 999.2 1002.5 1008.2 1014.8 1017.8 1020.9 1023.0 DAY 26 7 30 16 9 1 26 7 30 29 24 26 MIN. QFE PRESSURE IN HPA 1011.0 1007.8 1007.1 1006.0 997.1 995.5 992.7 993.5 999.0 1005.9 1009.0 1011.4 992.7 DAY 8 4 12 23 30 12 14 12 1 3 5 4 MEAN QNH PRESSURE IN HPA 1017.4 1015.3 1012.8 1009.9 1004.7 999.3 995.6 998.9 1003.0 1011.5 1013.6 1016.4 1008.2 MAX. QNH PRESSURE IN HPA 1023.2 1023.2 1015.2 1013.5 1009.2 1002.3 999.4 1002.7 1008.4 1015.0 1018.0 1021.1 1023.2 DAY 26 7 30 16 9 1 26 7 30 29 24 26 MIN. QNH PRESSURE IN HPA 1011.2 1008.0 1007.3 1006.2 997.3 995.7 992.9 993.7 999.2 1006.1 1009.2 1011.6 992.9 DAY 8 4 12 23 30 12 14 12 1 3 5 4 MEAN QFF PRESSURE IN HPA 1017.7 1015.6 1013.2 1010.2 1005.0 999.5 995.9 999.2 1003.3 1011.7 1013.8 1016.6 1008.5 MAX. QFF PRESSURE IN HPA 1023.5 1023.5 1015.5 1013.8 1009.5 1002.6 999.7 1003.0 1008.7 1015.3 1018.3 1021.4 1023.5 DAY 26 7 30 16 9 1 26 18 30 29 24 26 MIN. QFF PRESSURE IN HPA 1011.5 1008.3 1007.6 1006.5 997.6 996.0 993.2 994.0 999.5 1006.4 1009.5 1011.9 993.2 DAY 8 4 12 23 30 12 14 12 1 3 5 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 22.6 21.4 23.2 26.5 30.3 32.1 32.8 33.9 33.3 30.3 28.1 22.6 28.1 MINIMUN AIR TEMPERATURE (C) 19.6 18.1 20.4 22.8 26.9 29.0 30.5 31.6 30.3 27.5 25.3 19.7 25.1 DAYS WITH MINIMUM TEMP. >=21 7 1 11 25 31 30 31 31 30 31 30 9 267 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 16.5 14.8 17.5 20.0 24.5 27.0 28.0 29.4 28.0 24.0 22.5 14.0 14.0 DAY 28 19 5 9 15 8 2 19 20 30 21 8 MAXIMUM AIR TEMPERATURE (C) 25.0 23.8 25.3 29.4 33.5 34.6 34.6 35.5 35.0 31.9 30.0 24.7 30.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 12 31 30 31 31 30 31 15 0 211 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 28.0 26.6 28.0 34.0 38.5 38.4 37.0 36.6 37.0 34.6 31.5 29.0 38.5 DAY 5 24 22 30 16 28 4 8 12 4 8 1 DIF. BETWEEN (MAX.-MIN.) (C) 5.4 5.7 4.9 6.6 6.6 5.6 4.1 3.9 4.7 4.4 4.7 5.0 5.2 MEAN DAILY TEMP. (MDT) (C) 22.3 20.9 22.8 26.1 30.2 31.8 32.6 33.5 32.7 29.7 27.6 22.2 27.7 COOLING DEG. DAYS(BASE 21 0C) 41.8 11.6 57.0 154.1 284.9 324.4 358.3 388.6 349.6 270.2 198.4 50.6 2489.8 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 0.5 DEWPOINT (MEAN C) 13.7 12.4 17.4 19.7 23.0 25.8 27.9 28.5 26.3 22.9 19.8 12.8 20.9 MIXING RATIO (G/KG) 9.97 9.23 12.60 14.70 18.14 21.77 24.60 25.37 22.10 17.82 14.56 9.61 16.71 VAPOUR PRESSURE (HPA) 16.03 14.82 20.10 23.29 28.47 33.70 37.83 39.08 34.47 28.17 23.22 15.47 26.22 SATURATION DEF. (HPA) 11.51 10.80 8.39 11.64 14.98 14.27 12.06 13.89 16.87 15.07 14.83 12.18 13.04 RELATIVE HUMIDITY (MEAN %) 58 58 71 68 67 71 76 74 68 66 61 55 66 RELATIVE HUMIDITY (MAX. %) 69 67 83 85 80 85 87 84 78 75 70 65 77 RELATIVE HUMIDITY (MIN. %) 51 50 61 56 54 61 68 67 59 58 54 48 57 RELATIVE HUMIDITY (MEAN% 03UTC) 66 67 82 83 78 83 86 83 77 74 69 63 76 RELATIVE HUMIDITY (MEAN% 09UTC) 54 55 65 67 62 66 72 70 64 62 57 50 62 RELATIVE HUMIDITY (MEAN% 15UTC) 61 60 73 66 67 70 75 73 65 66 65 59 67 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.0 0.0 5.5 0.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.5 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH PRECIPITATION >= 5 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH PRECIPITATION >= 1 0 0 1 0 1 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION 2 0 7 0 1 0 0 0 0 0 0 0 10 GREATEST DAILY PRECIPITATION 0.0 0.0 4.2 0.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.2 DAY ** ** 26 ** 11 ** ** ** ** ** ** ** DAY WITH THUNDER STORM 1 0 1 0 0 0 0 0 0 0 1 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 5 11 2 8 9 8 1 2 3 4 5 7 65 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 225 90 90 90 90 270 270 PREVAILING WIND SPEED(KNOTS) 9.4 14.0 8.8 12.3 12.1 13.0 6.9 10.3 11.1 8.4 8.7 14.5 11.6 PREVAILING WIND PERCENT 23.2 34.3 26.5 35.3 32.9 29.3 29.0 22.6 20.7 23.9 17.3 29.0 22.5 CALMS PERCENT OF WIND 29.7 25.7 21.9 20.0 17.4 14.0 20.0 27.1 29.3 35.5 25.3 31.6 24.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 311 280 316 267 274 257 232 94 104 71 279 289 275 VECTOR WIND MAGNITUDE(KNOTS) 1.0 7.3 1.7 5.0 6.1 5.8 1.9 1.8 1.2 0.7 0.7 4.9 2.4 WIND STEADINESES (MEAN %) 16.4 80.2 23.3 61.7 69.3 69.9 35.2 28.1 18.5 12.5 9.5 53.8 32.4 WIND SPEED (MEAN KNOTS) 6.1 9.1 7.3 8.1 8.8 8.3 5.4 6.4 6.5 5.6 7.4 9.1 7.4 FASTEST WIND DIRECTION 70 270 70 300 300 300 270 290 70 60 300 300 300 FASTEST WIND SPEED (KNOTS) 31 29 27 27 27 29 17 17 17 29 21 35 35 DAY 10 15 26 12 10 5 1 3 22 10 11 7 DAYS WITH SKY CLEAR (0-2)/8 18 26 15 20 23 30 16 28 28 31 26 22 283 DAYS WITH P.CLOUDY (3-6)/8 11 2 9 9 7 0 10 3 2 0 4 9 66 DAYS WITH CLOUDY (7-8)/8 2 0 7 1 1 0 5 0 0 0 0 0 16 DAYS WITH VISIBILITY =< 2 KM 1 2 4 3 5 5 3 4 0 0 1 0 28 DURATION OF SUNSHINE HOURS 247.7 252.0 193.4 263.0 307.5 340.7 272.9 283.2 298.4 310.1 268.7 263.3 3300.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1016.6 1014.4 1013.5 1009.6 1005.6 997.0 994.8 997.6 1005.8 1012.3 1015.2 1018.8 1008.4 MAX. QFE PRESSURE IN HPA 1024.6 1019.9 1019.7 1017.4 1012.1 1001.4 998.7 1003.5 1014.0 1018.0 1019.8 1024.5 1024.6 DAY-HOUR 28- 6 21- 6 18- 6 16- 6 8- 6 1- 6 3- 6 15- 6 23- 6 20- 6 24- 6 28- 6 MIN. QFE PRESSURE IN HPA 1011.7 1009.6 1006.0 1002.9 999.5 990.8 991.2 992.6 996.7 1006.1 1010.1 1008.5 990.8 DAY-HOUR 31-12 12-15 12- 3 30-15 28-15 27-15 30-15 3-15 2-15 3-15 13-15 4-12 MEAN QNH PRESSURE IN HPA 1016.8 1014.6 1013.7 1009.8 1005.9 997.2 995.0 997.8 1006.0 1012.5 1015.4 1019.0 1008.6 MAX. QNH PRESSURE IN HPA 1024.8 1020.1 1019.9 1017.6 1012.3 1001.6 998.9 1003.7 1014.2 1018.2 1020.0 1024.7 1024.8 DAY-HOUR 28- 6 21- 6 18- 6 16- 6 8- 6 1- 6 3- 6 15- 6 23- 6 20- 6 24- 6 28- 6 MIN. QNH PRESSURE IN HPA 1011.9 1009.8 1006.2 1003.1 999.7 991.0 991.4 992.8 996.9 1006.3 1010.3 1008.7 991.0 DAY-HOUR 31-12 12-15 12- 3 30-15 28-15 27-15 30-15 3-15 2-15 3-15 13-15 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.4 1014.3 1013.2 1009.2 1005.5 997.1 995.1 997.8 1005.6 1012.4 1015.3 1018.7 1008.4 MAX. QFE PRESSURE IN HPA 1021.7 1018.6 1018.0 1014.6 1010.4 1000.8 998.0 1002.2 1012.4 1017.3 1017.9 1022.1 1022.1 DAY 28 21 18 15 8 1 3 15 23 20 24 10 MIN. QFE PRESSURE IN HPA 1012.6 1010.6 1006.0 1004.8 1001.2 991.7 992.4 994.0 997.5 1006.7 1011.5 1009.9 991.7 DAY 24 12 12 30 27 28 21 1 1 4 13 4 MEAN QNH PRESSURE IN HPA 1016.6 1014.6 1013.4 1009.5 1005.7 997.3 995.3 998.0 1005.8 1012.6 1015.5 1019.0 1008.6 MAX. QNH PRESSURE IN HPA 1021.9 1018.8 1018.2 1014.8 1010.6 1001.0 998.2 1002.4 1012.6 1017.5 1018.1 1022.3 1022.3 DAY 28 21 18 15 8 1 3 15 23 20 24 10 MIN. QNH PRESSURE IN HPA 1012.8 1010.8 1006.2 1005.0 1001.4 991.9 992.6 994.2 997.7 1006.9 1011.7 1010.1 991.9 DAY 24 12 12 30 27 28 21 1 1 4 13 4 MEAN QFF PRESSURE IN HPA 1016.9 1014.9 1013.7 1009.7 1006.0 997.6 995.6 998.3 1006.1 1012.8 1015.8 1019.3 1008.9 MAX. QFF PRESSURE IN HPA 1022.2 1019.1 1018.5 1015.1 1010.9 1001.3 998.5 1002.7 1012.9 1017.8 1018.4 1022.6 1022.6 DAY 28 21 18 15 8 1 3 15 23 20 24 10 MIN. QFF PRESSURE IN HPA 1013.1 1011.1 1006.5 1005.3 1001.7 992.2 992.9 994.5 998.0 1007.2 1012.0 1010.4 992.2 DAY 24 12 12 30 27 28 21 1 1 4 13 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1016.0 1015.0 1011.1 1006.9 998.2 995.9 999.0 1007.1 1014.0 1016.9 1020.6 1009.9 MAX. QFE PRESSURE IN HPA 1024.6 1019.9 1019.7 1017.4 1012.1 1001.4 998.7 1003.5 1014.0 1018.0 1019.8 1024.5 1024.6 DAY 28 21 18 16 8 1 3 15 23 20 24 28 MIN. QFE PRESSURE IN HPA 1014.6 1011.4 1007.6 1006.5 1002.7 992.9 993.0 994.9 998.9 1008.8 1013.1 1011.1 992.9 DAY 16 12 12 30 27 28 21 1 1 4 13 4 MEAN QNH PRESSURE IN HPA 1018.7 1016.2 1015.2 1011.3 1007.1 998.4 996.2 999.2 1007.4 1014.2 1017.2 1020.8 1010.2 MAX. QNH PRESSURE IN HPA 1024.8 1020.1 1019.9 1017.6 1012.3 1001.6 998.9 1003.7 1014.2 1018.2 1020.0 1024.7 1024.8 DAY 28 21 18 16 8 1 3 15 23 20 24 28 MIN. QNH PRESSURE IN HPA 1014.8 1011.6 1007.8 1006.7 1002.9 993.1 993.2 995.1 999.1 1009.0 1013.3 1011.3 993.1 DAY 16 12 12 30 27 28 21 1 1 4 13 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.0 1015.1 1014.2 1010.5 1006.5 997.8 995.4 998.5 1006.5 1012.8 1015.4 1019.2 1009.1 MAX. QFE PRESSURE IN HPA 1023.7 1018.3 1019.0 1016.9 1011.3 1000.7 997.8 1002.9 1013.3 1016.0 1018.3 1023.3 1023.7 DAY 28 21 18 15 14 14 3 15 23 31 23 28 MIN. QFE PRESSURE IN HPA 1013.4 1011.9 1007.7 1006.1 1002.1 993.2 993.1 994.4 998.2 1007.8 1011.7 1010.2 993.1 DAY 16 12 12 30 31 27 21 1 1 5 13 4 MEAN QNH PRESSURE IN HPA 1017.2 1015.3 1014.5 1010.7 1006.7 998.1 995.7 998.7 1006.7 1013.0 1015.7 1019.5 1009.3 MAX. QNH PRESSURE IN HPA 1023.9 1018.5 1019.2 1017.1 1011.5 1000.9 998.0 1003.1 1013.5 1016.2 1018.5 1023.5 1023.9 DAY 28 21 18 15 14 14 3 15 23 31 23 28 MIN. QNH PRESSURE IN HPA 1013.6 1012.1 1007.9 1006.3 1002.3 993.4 993.3 994.6 998.4 1008.0 1011.9 1010.4 993.3 DAY 16 12 12 30 31 27 21 1 1 5 13 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.5 1013.5 1012.5 1008.7 1004.9 996.4 994.0 996.7 1004.8 1011.2 1014.1 1017.7 1007.5 MAX. QFE PRESSURE IN HPA 1021.1 1016.5 1017.0 1014.0 1009.6 999.1 996.3 1000.7 1012.2 1014.4 1016.5 1021.6 1021.6 DAY 28 8 18 15 14 14 3 15 23 31 23 28 MIN. QFE PRESSURE IN HPA 1011.7 1009.7 1006.5 1003.6 1000.4 991.9 991.7 993.4 996.8 1006.3 1010.3 1008.5 991.7 DAY 31 12 12 30 28 28 30 3 1 3 13 4 MEAN QNH PRESSURE IN HPA 1015.7 1013.7 1012.7 1008.9 1005.1 996.6 994.2 996.9 1005.1 1011.5 1014.3 1018.0 1007.7 MAX. QNH PRESSURE IN HPA 1021.3 1016.7 1017.2 1014.2 1009.8 999.3 996.5 1000.9 1012.4 1014.6 1016.7 1021.8 1021.8 DAY 28 8 18 15 14 14 3 15 23 31 23 28 MIN. QNH PRESSURE IN HPA 1011.9 1009.9 1006.7 1003.8 1000.6 992.1 991.9 993.6 997.0 1006.5 1010.5 1008.7 991.9 DAY 31 12 12 30 28 28 30 3 1 3 13 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1015.5 1013.3 1012.5 1008.4 1004.4 995.7 993.4 996.1 1004.9 1011.3 1014.2 1017.8 1007.3 MAX. QFE PRESSURE IN HPA 1020.0 1016.5 1017.0 1014.0 1009.5 998.6 995.4 1000.3 1012.5 1014.9 1016.6 1021.9 1021.9 DAY 28 21 18 15 7 14 3 14 23 31 22 28 MIN. QFE PRESSURE IN HPA 1011.7 1009.6 1006.5 1002.9 999.5 990.8 991.2 992.6 996.7 1006.1 1010.1 1008.6 990.8 DAY 31 12 11 30 28 27 30 3 2 3 13 4 MEAN QNH PRESSURE IN HPA 1015.7 1013.5 1012.7 1008.7 1004.7 996.0 993.6 996.4 1005.1 1011.5 1014.4 1018.1 1007.5 MAX. QNH PRESSURE IN HPA 1020.2 1016.7 1017.2 1014.2 1009.7 998.8 995.6 1000.5 1012.7 1015.1 1016.8 1022.1 1022.1 DAY 28 21 18 15 7 14 3 14 23 31 22 28 MIN. QNH PRESSURE IN HPA 1011.9 1009.8 1006.7 1003.1 999.7 991.0 991.4 992.8 996.9 1006.3 1010.3 1008.8 991.0 DAY 31 12 11 30 28 27 30 3 2 3 13 4 MEAN QFF PRESSURE IN HPA 1016.0 1013.8 1013.0 1008.9 1004.9 996.2 993.9 996.6 1005.4 1011.8 1014.7 1018.4 1007.8 MAX. QFF PRESSURE IN HPA 1020.5 1017.0 1017.5 1014.5 1010.0 999.1 995.9 1000.8 1013.0 1015.4 1017.1 1022.4 1022.4 DAY 28 21 18 15 7 14 3 14 23 31 22 28 MIN. QFF PRESSURE IN HPA 1012.2 1010.1 1007.0 1003.4 1000.0 991.3 991.7 993.1 997.2 1006.6 1010.6 1009.1 991.3 DAY 31 12 11 30 28 27 30 3 2 3 13 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 22.0 21.8 22.3 25.4 29.4 32.2 32.8 34.3 33.1 30.9 27.2 22.0 27.8 MINIMUN AIR TEMPERATURE (C) 18.6 18.9 19.4 22.4 26.3 28.8 30.2 31.9 29.7 27.7 24.2 19.7 24.8 DAYS WITH MINIMUM TEMP. >=21 0 5 4 25 31 30 31 31 30 31 30 8 256 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 15.4 16.0 17.6 19.0 22.6 26.0 27.0 30.4 25.0 25.4 21.0 16.0 15.4 DAY 30 13 2 2 5 27 25 28 30 31 26 16 MAXIMUM AIR TEMPERATURE (C) 24.1 24.0 24.4 27.9 32.3 34.8 34.9 36.2 35.2 33.3 29.5 24.5 30.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 27 30 31 31 30 31 13 0 197 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.6 26.6 26.8 32.4 36.0 39.0 38.0 37.6 38.0 36.6 33.5 28.0 39.0 DAY 7 19 26 16 8 22 5 13 4 11 5 3 DIF. BETWEEN (MAX.-MIN.) (C) 5.5 5.1 5.0 5.5 6.0 6.0 4.7 4.3 5.5 5.6 5.3 4.8 5.3 MEAN DAILY TEMP. (MDT) (C) 21.4 21.4 21.9 25.2 29.3 31.8 32.5 34.0 32.4 30.5 26.8 22.1 27.4 COOLING DEG. DAYS(BASE 21 0C) 18.4 22.7 30.9 124.6 257.3 323.5 357.3 403.3 342.4 293.5 175.4 42.2 2391.8 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DEWPOINT (MEAN C) 14.5 14.8 16.6 19.1 23.0 25.5 27.4 28.3 25.2 22.3 17.0 15.8 20.8 MIXING RATIO (G/KG) 10.33 10.70 11.93 14.14 18.11 21.33 23.81 25.02 20.76 17.15 12.49 11.26 16.42 VAPOUR PRESSURE (HPA) 16.64 17.15 19.07 22.44 28.44 33.11 36.67 38.60 32.43 27.10 19.94 18.09 25.81 SATURATION DEF. (HPA) 9.89 9.05 7.88 10.10 12.91 15.24 13.26 15.49 18.25 17.78 16.47 8.53 12.90 RELATIVE HUMIDITY (MEAN %) 63 66 71 70 70 70 74 72 64 61 55 69 67 RELATIVE HUMIDITY (MAX. %) 73 76 81 81 83 83 84 83 77 74 65 77 78 RELATIVE HUMIDITY (MIN. %) 55 57 64 59 58 57 66 63 57 52 47 62 58 RELATIVE HUMIDITY (MEAN% 03UTC) 71 74 78 80 82 83 83 82 77 73 61 75 77 RELATIVE HUMIDITY (MEAN% 09UTC) 58 61 68 66 65 65 71 67 59 56 51 64 63 RELATIVE HUMIDITY (MEAN% 15UTC) 65 67 73 70 70 69 74 70 64 62 57 71 68 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.0 12.2 112.0 4.0 0.0 0.0 10.0 0.0 0.0 0.0 0.0 134.8 273.0 DAYS WITH PRECIPITATION >=10 0 0 5 0 0 0 1 0 0 0 0 5 11 DAYS WITH PRECIPITATION >= 5 0 1 5 0 0 0 1 0 0 0 0 7 14 DAYS WITH PRECIPITATION >= 1 0 3 7 1 0 0 1 0 0 0 0 10 22 DAYS WITH PRECIPITATION 0 5 7 1 0 0 1 0 0 0 0 13 27 GREATEST DAILY PRECIPITATION 0.0 6.0 32.0 4.0 0.0 0.0 10.0 0.0 0.0 0.0 0.0 41.0 41.0 DAY ** 20 13 24 ** ** 23 ** ** ** ** 16 DAY WITH THUNDER STORM 0 0 2 0 0 0 0 1 0 0 0 3 6 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 8 4 3 4 6 8 2 5 2 3 4 2 51 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 90 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 12.3 12.1 12.5 11.7 12.5 10.5 8.6 9.0 9.3 9.0 9.9 9.3 11.0 PREVAILING WIND PERCENT 34.2 40.0 28.4 39.3 38.7 36.0 18.7 23.2 21.3 16.1 24.0 20.6 27.0 CALMS PERCENT OF WIND 30.3 23.6 20.0 18.7 17.4 19.3 32.3 22.6 28.0 29.0 30.0 23.2 24.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 275 284 282 280 271 260 229 117 225 306 329 322 273 VECTOR WIND MAGNITUDE(KNOTS) 4.4 4.4 1.6 5.0 5.8 5.3 2.4 1.6 2.8 1.2 2.7 1.7 2.7 WIND STEADINESES (MEAN %) 58.7 50.6 17.6 61.0 70.7 77.9 50.0 25.4 47.5 19.0 39.1 21.5 37.5 WIND SPEED (MEAN KNOTS) 7.5 8.7 9.1 8.2 8.2 6.8 4.8 6.3 5.9 6.3 6.9 7.9 7.2 FASTEST WIND DIRECTION 290 270 320 310 290 290 280 70 150 280 280 80 80 FASTEST WIND SPEED (KNOTS) 29 23 25 29 31 23 19 17 17 21 23 39 39 DAY 1 10 20 6 15 23 19 10 13 15 5 11 DAYS WITH SKY CLEAR (0-2)/8 28 15 15 16 30 30 23 29 30 31 29 6 282 DAYS WITH P.CLOUDY (3-6)/8 3 8 10 13 1 0 7 2 0 0 1 13 58 DAYS WITH CLOUDY (7-8)/8 0 5 6 1 0 0 1 0 0 0 0 12 25 DAYS WITH VISIBILITY =< 2 KM 0 1 5 0 2 6 1 7 2 0 2 1 27 DURATION OF SUNSHINE HOURS 270.0 208.5 245.0 242.9 ****** 363.2 309.2 303.8 313.0 313.9 284.6 134.0 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.3 1015.1 1013.9 1010.4 1006.2 999.8 995.0 998.3 1004.9 1010.7 1014.3 1018.3 1008.8 MAX. QFE PRESSURE IN HPA 1023.8 1020.8 1020.1 1016.7 1011.3 1007.1 1000.0 1004.7 1011.4 1017.5 1021.6 1024.0 1024.0 DAY-HOUR 18- 6 1- 6 3- 6 4- 6 26- 6 1- 9 28- 6 19- 6 13- 6 30- 6 30- 6 19- 6 MIN. QFE PRESSURE IN HPA 1013.2 1009.8 1007.6 1004.8 1000.6 995.3 989.5 991.9 997.2 1004.8 1006.8 1012.7 989.5 DAY-HOUR 13-12 23-15 14- 3 23-15 15-15 12-15 20-15 3-15 1-15 15-12 6-12 11-12 MEAN QNH PRESSURE IN HPA 1018.6 1015.3 1014.1 1010.7 1006.4 1000.0 995.2 998.5 1005.1 1010.9 1014.5 1018.5 1009.0 MAX. QNH PRESSURE IN HPA 1024.0 1021.0 1020.3 1016.9 1011.5 1007.3 1000.2 1004.9 1011.6 1017.7 1021.8 1024.2 1024.2 DAY-HOUR 18- 6 1- 6 3- 6 4- 6 26- 6 1- 9 28- 6 19- 6 13- 6 30- 6 30- 6 19- 6 MIN. QNH PRESSURE IN HPA 1013.4 1010.0 1007.8 1005.0 1000.8 995.5 989.7 992.1 997.4 1005.0 1007.0 1012.9 989.7 DAY-HOUR 13-12 23-15 14- 3 23-15 15-15 12-15 20-15 3-15 1-15 15-12 6-12 11-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.3 1015.0 1013.5 1010.0 1005.9 999.7 995.2 998.6 1005.0 1010.4 1014.3 1018.1 1008.7 MAX. QFE PRESSURE IN HPA 1021.5 1019.1 1018.1 1015.0 1010.0 1005.7 998.7 1003.0 1010.1 1016.1 1019.6 1021.9 1021.9 DAY 18 1 3 4 26 1 24 12 13 30 30 19 MIN. QFE PRESSURE IN HPA 1014.5 1011.6 1007.6 1005.2 1001.6 995.4 990.9 993.9 998.6 1006.1 1007.7 1013.3 990.9 DAY 14 28 14 17 16 14 20 3 1 15 6 6 MEAN QNH PRESSURE IN HPA 1018.5 1015.3 1013.8 1010.3 1006.1 999.9 995.4 998.8 1005.2 1010.7 1014.5 1018.3 1008.9 MAX. QNH PRESSURE IN HPA 1021.7 1019.3 1018.3 1015.2 1010.2 1005.9 998.9 1003.2 1010.3 1016.3 1019.8 1022.1 1022.1 DAY 18 1 3 4 26 1 24 12 13 30 30 19 MIN. QNH PRESSURE IN HPA 1014.7 1011.8 1007.8 1005.4 1001.8 995.6 991.1 994.1 998.8 1006.3 1007.9 1013.5 991.1 DAY 14 28 14 17 16 14 20 3 1 15 6 6 MEAN QFF PRESSURE IN HPA 1018.8 1015.5 1014.0 1010.5 1006.4 1000.2 995.6 999.0 1005.4 1010.9 1014.8 1018.6 1009.2 MAX. QFF PRESSURE IN HPA 1022.0 1019.6 1018.6 1015.5 1010.5 1006.2 999.2 1003.5 1010.6 1016.6 1020.1 1022.4 1022.4 DAY 18 1 3 4 26 1 24 12 13 30 30 19 MIN. QFF PRESSURE IN HPA 1015.0 1012.1 1008.1 1005.7 1002.1 995.9 991.4 994.4 999.1 1006.6 1008.2 1013.8 991.4 DAY 14 28 14 17 16 14 20 3 1 15 6 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1016.7 1015.4 1011.8 1007.4 1000.8 996.1 999.8 1006.4 1012.2 1016.0 1019.8 1010.2 MAX. QFE PRESSURE IN HPA 1023.8 1020.8 1020.1 1016.7 1011.3 1006.9 1000.0 1004.7 1011.4 1017.5 1021.6 1024.0 1024.0 DAY 18 1 3 4 26 2 28 19 13 30 30 19 MIN. QFE PRESSURE IN HPA 1016.3 1013.7 1009.8 1006.2 1002.7 996.5 992.1 994.6 999.7 1007.8 1009.3 1015.5 992.1 DAY 14 23 14 16 15 13 20 3 1 15 6 12 MEAN QNH PRESSURE IN HPA 1020.3 1017.0 1015.6 1012.1 1007.6 1001.0 996.3 1000.0 1006.6 1012.4 1016.2 1020.0 1010.4 MAX. QNH PRESSURE IN HPA 1024.0 1021.0 1020.3 1016.9 1011.5 1007.1 1000.2 1004.9 1011.6 1017.7 1021.8 1024.2 1024.2 DAY 18 1 3 4 26 2 28 19 13 30 30 19 MIN. QNH PRESSURE IN HPA 1016.5 1013.9 1010.0 1006.4 1002.9 996.7 992.3 994.8 999.9 1008.0 1009.5 1015.7 992.3 DAY 14 23 14 16 15 13 20 3 1 15 6 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.7 1015.8 1014.8 1011.3 1007.0 1000.6 995.7 999.1 1005.5 1011.2 1014.6 1018.5 1009.4 MAX. QFE PRESSURE IN HPA 1021.9 1019.4 1019.0 1015.8 1011.3 1007.1 999.7 1003.8 1010.6 1016.1 1020.4 1022.8 1022.8 DAY 18 1 3 3 26 1 4 19 13 24 30 19 MIN. QFE PRESSURE IN HPA 1015.2 1012.8 1008.8 1006.5 1002.1 997.1 991.5 993.7 998.4 1006.0 1007.9 1013.8 991.5 DAY 13 23 26 15 15 18 20 8 1 15 6 25 MEAN QNH PRESSURE IN HPA 1018.9 1016.0 1015.0 1011.6 1007.3 1000.9 995.9 999.3 1005.8 1011.4 1014.8 1018.7 1009.6 MAX. QNH PRESSURE IN HPA 1022.1 1019.6 1019.2 1016.0 1011.5 1007.3 999.9 1004.0 1010.8 1016.3 1020.6 1023.0 1023.0 DAY 18 1 3 3 26 1 4 19 13 24 30 19 MIN. QNH PRESSURE IN HPA 1015.4 1013.0 1009.0 1006.7 1002.3 997.3 991.7 993.9 998.6 1006.2 1008.1 1014.0 991.7 DAY 13 23 26 15 15 18 20 8 1 15 6 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.2 1013.9 1012.8 1009.7 1005.6 999.3 994.3 997.4 1003.9 1009.7 1013.3 1017.2 1007.9 MAX. QFE PRESSURE IN HPA 1019.9 1017.9 1017.3 1013.9 1009.6 1005.9 997.9 1001.8 1008.6 1014.8 1019.5 1021.0 1021.0 DAY 18 1 3 3 26 1 28 19 13 24 30 19 MIN. QFE PRESSURE IN HPA 1013.2 1010.5 1007.6 1005.0 1000.8 995.5 989.9 992.3 997.5 1004.8 1006.8 1012.7 989.9 DAY 13 23 26 15 15 13 20 3 1 15 6 11 MEAN QNH PRESSURE IN HPA 1017.4 1014.1 1013.1 1009.9 1005.8 999.5 994.6 997.6 1004.2 1009.9 1013.5 1017.5 1008.1 MAX. QNH PRESSURE IN HPA 1020.1 1018.1 1017.5 1014.1 1009.8 1006.1 998.1 1002.0 1008.8 1015.0 1019.7 1021.2 1021.2 DAY 18 1 3 3 26 1 28 19 13 24 30 19 MIN. QNH PRESSURE IN HPA 1013.4 1010.7 1007.8 1005.2 1001.0 995.7 990.1 992.5 997.7 1005.0 1007.0 1012.9 990.1 DAY 13 23 26 15 15 13 20 3 1 15 6 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1014.2 1013.0 1009.4 1005.0 998.7 993.9 996.8 1003.7 1010.0 1013.5 1017.8 1007.8 MAX. QFE PRESSURE IN HPA 1020.3 1018.1 1017.1 1013.9 1008.5 1005.9 997.5 1001.4 1008.3 1015.0 1019.7 1021.7 1021.7 DAY 18 1 3 3 3 2 3 19 13 30 30 19 MIN. QFE PRESSURE IN HPA 1013.7 1009.8 1008.2 1004.8 1000.6 995.3 989.5 991.9 997.2 1005.2 1007.2 1013.3 989.5 DAY 13 23 26 23 15 12 20 3 1 15 5 11 MEAN QNH PRESSURE IN HPA 1017.7 1014.4 1013.2 1009.6 1005.2 999.0 994.2 997.0 1004.0 1010.2 1013.8 1018.0 1008.0 MAX. QNH PRESSURE IN HPA 1020.5 1018.3 1017.3 1014.1 1008.7 1006.1 997.7 1001.6 1008.5 1015.2 1019.9 1021.9 1021.9 DAY 18 1 3 3 3 2 3 19 13 30 30 19 MIN. QNH PRESSURE IN HPA 1013.9 1010.0 1008.4 1005.0 1000.8 995.5 989.7 992.1 997.4 1005.4 1007.4 1013.5 989.7 DAY 13 23 26 23 15 12 20 3 1 15 5 11 MEAN QFF PRESSURE IN HPA 1018.0 1014.7 1013.5 1009.9 1005.5 999.2 994.4 997.2 1004.2 1010.4 1014.0 1018.3 1008.3 MAX. QFF PRESSURE IN HPA 1020.8 1018.6 1017.6 1014.4 1009.0 1006.4 998.0 1001.9 1008.8 1015.5 1020.2 1022.2 1022.2 DAY 18 1 3 3 3 2 3 19 13 30 30 19 MIN. QFF PRESSURE IN HPA 1014.2 1010.3 1008.7 1005.3 1001.1 995.8 990.0 992.4 997.7 1005.7 1007.7 1013.8 990.0 DAY 13 23 26 23 15 12 20 3 1 15 5 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.7 21.4 22.4 26.4 30.6 33.4 35.0 35.0 33.6 30.7 26.6 23.0 28.2 MINIMUN AIR TEMPERATURE (C) 18.3 18.7 20.2 23.3 27.1 30.4 31.7 32.4 30.8 27.2 23.5 19.7 25.3 DAYS WITH MINIMUM TEMP. >=21 4 4 14 28 31 30 31 31 30 31 28 10 272 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 15.0 15.5 16.8 19.5 24.4 28.5 29.5 31.0 28.4 24.4 20.0 18.0 15.0 DAY 15 7 16 1 2 29 6 28 30 24 7 10 MAXIMUM AIR TEMPERATURE (C) 22.8 23.6 24.1 28.8 33.7 35.4 37.3 36.7 35.3 32.8 28.5 24.9 30.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 10 29 30 31 31 30 31 10 0 202 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.6 25.6 26.5 35.0 37.4 38.4 40.0 37.8 37.4 34.6 31.4 27.0 40.0 DAY 7 4 5 25 9 27 1 20 17 1 9 11 DIF. BETWEEN (MAX.-MIN.) (C) 4.5 4.9 3.9 5.5 6.6 5.0 5.6 4.3 4.5 5.6 5.0 5.2 5.0 MEAN DAILY TEMP. (MDT) (C) 20.6 21.2 22.2 26.0 30.4 32.9 34.5 34.5 33.1 30.0 26.0 22.3 27.8 COOLING DEG. DAYS(BASE 21 0C) 15.5 17.2 40.6 151.3 290.7 356.3 417.8 419.0 362.9 277.9 150.6 40.3 2540.4 HEATING DEG. DAYS(BASE 18 0C) 1.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 DEWPOINT (MEAN C) 14.4 16.3 18.4 20.6 24.0 27.1 28.4 28.2 26.6 21.6 16.2 14.3 21.3 MIXING RATIO (G/KG) 10.42 11.72 13.51 15.49 19.35 23.23 25.41 24.96 22.63 16.63 11.65 10.21 17.10 VAPOUR PRESSURE (HPA) 16.75 18.75 21.49 24.51 30.31 35.97 39.09 38.52 35.19 26.28 18.65 16.43 26.83 SATURATION DEF. (HPA) 7.83 6.80 5.72 10.24 13.91 15.73 17.20 17.64 16.92 18.11 16.44 11.85 13.20 RELATIVE HUMIDITY (MEAN %) 68 74 79 72 70 70 70 69 68 60 54 59 68 RELATIVE HUMIDITY (MAX. %) 78 84 88 84 86 82 82 82 77 71 62 68 79 RELATIVE HUMIDITY (MIN. %) 60 66 72 62 53 61 60 60 61 51 47 50 59 RELATIVE HUMIDITY (MEAN% 03UTC) 72 81 85 84 84 82 81 81 77 70 61 64 77 RELATIVE HUMIDITY (MEAN% 09UTC) 66 70 76 67 64 66 66 64 64 55 50 56 64 RELATIVE HUMIDITY (MEAN% 15UTC) 70 75 81 71 66 67 68 68 70 60 55 60 68 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 185.0 27.0 152.2 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 366.8 DAYS WITH PRECIPITATION >=10 4 1 5 0 0 0 0 0 0 0 0 0 10 DAYS WITH PRECIPITATION >= 5 5 2 6 0 0 0 0 0 0 0 0 0 13 DAYS WITH PRECIPITATION >= 1 7 4 11 0 0 0 0 0 0 0 0 1 23 DAYS WITH PRECIPITATION 7 4 16 2 0 0 0 0 0 0 0 1 30 GREATEST DAILY PRECIPITATION 87.0 15.0 62.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 87.0 DAY 12 28 13 5 ** ** ** ** ** ** ** 24 DAY WITH THUNDER STORM 0 1 4 1 0 0 0 0 0 0 0 1 7 DAYS WITH SNOW OR SLEET 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 5 4 5 1 1 3 0 1 2 3 0 25 WIND DIRECTION (PREVAILING) 90 90 90 270 225 270 45 90 270 270 45 90 270 PREVAILING WIND SPEED(KNOTS) 12.1 11.4 11.1 12.9 7.5 7.9 8.3 8.6 8.1 8.0 14.9 8.9 9.6 PREVAILING WIND PERCENT 29.0 27.6 23.2 36.0 23.2 23.3 14.8 20.6 28.0 20.0 24.7 16.8 19.5 CALMS PERCENT OF WIND 14.8 22.8 12.3 16.0 40.6 21.3 32.3 35.5 28.0 38.7 30.7 47.1 28.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 63 63 16 285 247 234 119 128 244 218 40 25 348 VECTOR WIND MAGNITUDE(KNOTS) 4.7 2.2 3.0 5.0 3.4 2.2 0.8 1.4 3.0 0.5 3.8 0.8 0.5 WIND STEADINESES (MEAN %) 49.5 24.4 30.0 58.1 79.1 37.3 16.0 30.4 58.8 10.4 47.5 17.8 7.6 WIND SPEED (MEAN KNOTS) 9.5 9.0 10.0 8.6 4.3 5.9 5.0 4.6 5.1 4.8 8.0 4.5 6.6 FASTEST WIND DIRECTION 60 60 270 280 230 80 270 80 280 70 60 290 60 FASTEST WIND SPEED (KNOTS) 31 23 23 23 14 16 17 17 17 27 31 27 31 DAY 11 18 28 26 22 9 4 21 20 20 19 24 DAYS WITH SKY CLEAR (0-2)/8 17 17 9 20 22 30 27 29 30 31 22 25 279 DAYS WITH P.CLOUDY (3-6)/8 10 9 12 8 7 0 4 1 0 0 7 6 64 DAYS WITH CLOUDY (7-8)/8 4 3 10 2 2 0 0 1 0 0 1 0 23 DAYS WITH VISIBILITY =< 2 KM 1 1 9 1 5 2 1 2 1 1 0 2 26 DURATION OF SUNSHINE HOURS 218.2 240.4 170.7 309.4 333.6 349.6 319.7 303.6 298.3 312.7 258.1 270.8 3385.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1017.0 1014.6 1011.9 1009.2 1005.8 999.3 996.6 999.1 1003.0 1011.0 1015.2 1018.3 1008.4 MAX. QFE PRESSURE IN HPA 1023.6 1019.1 1016.8 1016.1 1011.1 1005.4 1003.8 1005.1 1011.8 1016.2 1022.9 1023.4 1023.6 DAY-HOUR 28- 6 7- 6 1- 6 8- 6 4- 6 1- 6 3- 6 27- 6 25- 6 13- 6 15- 6 28- 6 MIN. QFE PRESSURE IN HPA 1007.4 1009.3 1006.2 1004.9 998.4 994.3 992.7 992.8 998.7 1004.3 1010.0 1013.8 992.7 DAY-HOUR 12- 3 5- 3 19-12 28-15 29-15 20-12 25-15 3-15 18-15 5-12 2-12 15-12 MEAN QNH PRESSURE IN HPA 1017.2 1014.8 1012.1 1009.5 1006.0 999.5 996.8 999.4 1003.2 1011.2 1015.4 1018.6 1008.6 MAX. QNH PRESSURE IN HPA 1023.8 1019.3 1017.0 1016.3 1011.3 1005.6 1004.0 1005.3 1012.0 1016.4 1023.1 1023.6 1023.8 DAY-HOUR 28- 6 7- 6 1- 6 8- 6 4- 6 1- 6 3- 6 27- 6 25- 6 13- 6 15- 6 28- 6 MIN. QNH PRESSURE IN HPA 1007.6 1009.5 1006.4 1005.1 998.6 994.5 992.9 993.0 998.9 1004.5 1010.2 1014.0 992.9 DAY-HOUR 12- 3 5- 3 19-12 28-15 29-15 20-12 25-15 3-15 18-15 5-12 2-12 15-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1014.3 1011.5 1009.0 1005.4 999.4 996.7 999.2 1003.0 1010.9 1015.0 1018.3 1008.3 MAX. QFE PRESSURE IN HPA 1021.9 1017.9 1015.1 1014.7 1008.6 1004.2 1003.0 1003.1 1010.1 1014.6 1021.6 1021.7 1021.9 DAY 28 8 2 8 4 1 3 27 25 24 16 28 MIN. QFE PRESSURE IN HPA 1007.4 1009.3 1006.3 1006.2 998.8 994.5 993.4 994.0 999.8 1005.3 1010.5 1015.0 993.4 DAY 12 5 20 28 30 20 12 14 19 5 1 16 MEAN QNH PRESSURE IN HPA 1016.9 1014.5 1011.7 1009.2 1005.6 999.6 996.9 999.4 1003.2 1011.1 1015.3 1018.5 1008.5 MAX. QNH PRESSURE IN HPA 1022.1 1018.1 1015.3 1014.9 1008.8 1004.4 1003.2 1003.3 1010.3 1014.8 1021.8 1021.9 1022.1 DAY 28 8 2 8 4 1 3 27 25 24 16 28 MIN. QNH PRESSURE IN HPA 1007.6 1009.5 1006.5 1006.4 999.0 994.7 993.6 994.2 1000.0 1005.5 1010.7 1015.2 993.6 DAY 12 5 20 28 30 20 12 14 19 5 1 16 MEAN QFF PRESSURE IN HPA 1017.2 1014.8 1012.0 1009.5 1005.8 999.9 997.2 999.7 1003.5 1011.4 1015.5 1018.8 1008.8 MAX. QFF PRESSURE IN HPA 1022.4 1018.4 1015.6 1015.2 1009.1 1004.7 1003.5 1003.6 1010.6 1015.1 1022.1 1022.2 1022.4 DAY 28 8 2 8 4 1 3 27 25 24 16 28 MIN. QFF PRESSURE IN HPA 1007.9 1009.8 1006.8 1006.7 999.3 995.0 993.9 994.5 1000.3 1005.8 1011.0 1015.5 993.9 DAY 12 5 20 28 30 20 12 14 19 5 1 16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1016.1 1013.2 1010.7 1007.0 1000.5 997.8 1000.5 1004.5 1012.6 1016.7 1020.1 1009.9 MAX. QFE PRESSURE IN HPA 1023.6 1019.1 1016.8 1016.1 1011.1 1005.4 1003.8 1005.1 1011.8 1016.2 1022.9 1023.4 1023.6 DAY 28 7 1 8 4 1 3 27 25 13 15 28 MIN. QFE PRESSURE IN HPA 1010.0 1011.4 1008.8 1007.7 1000.2 995.2 994.5 995.3 1001.2 1006.9 1012.4 1017.0 994.5 DAY 12 5 20 28 30 20 25 14 19 5 2 16 MEAN QNH PRESSURE IN HPA 1019.1 1016.3 1013.5 1010.9 1007.2 1000.7 998.0 1000.7 1004.7 1012.8 1016.9 1020.3 1010.1 MAX. QNH PRESSURE IN HPA 1023.8 1019.3 1017.0 1016.3 1011.3 1005.6 1004.0 1005.3 1012.0 1016.4 1023.1 1023.6 1023.8 DAY 28 7 1 8 4 1 3 27 25 13 15 28 MIN. QNH PRESSURE IN HPA 1010.2 1011.6 1009.0 1007.9 1000.4 995.4 994.7 995.5 1001.4 1007.1 1012.6 1017.2 994.7 DAY 12 5 20 28 30 20 25 14 19 5 2 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1015.2 1012.5 1010.0 1006.6 1000.1 997.4 999.9 1003.6 1011.5 1015.4 1018.5 1009.0 MAX. QFE PRESSURE IN HPA 1022.1 1018.3 1015.6 1015.5 1010.3 1005.2 1003.4 1004.2 1010.5 1015.1 1021.7 1021.6 1022.1 DAY 28 7 1 8 4 1 3 27 25 13 15 8 MIN. QFE PRESSURE IN HPA 1009.6 1011.5 1008.4 1006.6 1000.2 995.0 994.5 995.0 1000.1 1005.8 1011.2 1015.4 994.5 DAY 12 5 20 28 30 20 25 3 19 5 1 16 MEAN QNH PRESSURE IN HPA 1017.6 1015.4 1012.7 1010.2 1006.8 1000.3 997.6 1000.2 1003.8 1011.7 1015.6 1018.8 1009.2 MAX. QNH PRESSURE IN HPA 1022.3 1018.5 1015.8 1015.7 1010.5 1005.4 1003.6 1004.4 1010.7 1015.3 1021.9 1021.8 1022.3 DAY 28 7 1 8 4 1 3 27 25 13 15 8 MIN. QNH PRESSURE IN HPA 1009.8 1011.7 1008.6 1006.8 1000.4 995.2 994.7 995.2 1000.3 1006.0 1011.4 1015.6 994.7 DAY 12 5 20 28 30 20 25 3 19 5 1 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.9 1013.5 1010.9 1008.3 1005.2 998.5 996.0 998.3 1002.0 1010.1 1014.2 1017.1 1007.5 MAX. QFE PRESSURE IN HPA 1020.6 1016.5 1014.5 1013.7 1008.6 1003.6 1003.0 1002.5 1008.7 1013.7 1020.6 1020.1 1020.6 DAY 27 7 1 7 17 1 3 27 25 13 15 8 MIN. QFE PRESSURE IN HPA 1009.5 1010.3 1006.2 1005.1 998.9 994.3 993.2 993.4 999.0 1004.3 1010.0 1013.8 993.2 DAY 12 22 19 28 29 20 12 14 18 5 2 15 MEAN QNH PRESSURE IN HPA 1016.2 1013.7 1011.1 1008.5 1005.4 998.7 996.2 998.5 1002.3 1010.3 1014.4 1017.4 1007.7 MAX. QNH PRESSURE IN HPA 1020.8 1016.7 1014.7 1013.9 1008.8 1003.8 1003.2 1002.7 1008.9 1013.9 1020.8 1020.3 1020.8 DAY 27 7 1 7 17 1 3 27 25 13 15 8 MIN. QNH PRESSURE IN HPA 1009.7 1010.5 1006.4 1005.3 999.1 994.5 993.4 993.6 999.2 1004.5 1010.2 1014.0 993.4 DAY 12 22 19 28 29 20 12 14 18 5 2 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1016.3 1014.0 1011.3 1008.2 1004.8 998.0 995.4 997.8 1001.9 1010.2 1014.6 1017.7 1007.5 MAX. QFE PRESSURE IN HPA 1021.2 1017.7 1015.4 1014.1 1007.9 1002.4 1002.6 1001.6 1008.7 1014.1 1021.4 1020.9 1021.4 DAY 28 7 1 7 4 1 3 27 25 23 15 27 MIN. QFE PRESSURE IN HPA 1011.0 1011.0 1006.2 1004.9 998.4 994.4 992.7 992.8 998.7 1004.6 1010.1 1013.9 992.7 DAY 12 15 19 28 29 17 25 3 18 5 1 15 MEAN QNH PRESSURE IN HPA 1016.5 1014.2 1011.5 1008.5 1005.0 998.2 995.6 998.0 1002.1 1010.4 1014.8 1017.9 1007.7 MAX. QNH PRESSURE IN HPA 1021.4 1017.9 1015.6 1014.3 1008.1 1002.6 1002.8 1001.8 1008.9 1014.3 1021.6 1021.1 1021.6 DAY 28 7 1 7 4 1 3 27 25 23 15 27 MIN. QNH PRESSURE IN HPA 1011.2 1011.2 1006.4 1005.1 998.6 994.6 992.9 993.0 998.9 1004.8 1010.3 1014.1 992.9 DAY 12 15 19 28 29 17 25 3 18 5 1 15 MEAN QFF PRESSURE IN HPA 1016.8 1014.5 1011.8 1008.7 1005.3 998.5 995.8 998.3 1002.4 1010.7 1015.1 1018.2 1008.0 MAX. QFF PRESSURE IN HPA 1021.7 1018.2 1015.9 1014.6 1008.4 1002.9 1003.1 1002.1 1009.2 1014.6 1021.9 1021.4 1021.9 DAY 28 7 1 7 4 1 3 27 25 23 15 27 MIN. QFF PRESSURE IN HPA 1011.5 1011.5 1006.7 1005.4 998.9 994.9 993.2 993.3 999.2 1005.1 1010.6 1014.4 993.2 DAY 12 15 19 28 29 17 25 3 18 5 1 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 21.0 21.3 21.7 24.3 29.2 32.7 33.5 33.9 33.5 31.4 26.2 23.0 27.6 MINIMUN AIR TEMPERATURE (C) 17.9 18.7 18.9 21.1 25.5 29.3 30.9 31.2 30.1 28.1 23.2 20.2 24.6 DAYS WITH MINIMUM TEMP. >=21 2 3 3 16 31 30 31 31 30 30 27 10 244 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 15.2 16.0 15.4 17.6 22.0 26.2 29.4 30.0 27.8 20.0 18.6 17.0 15.2 DAY 25 2 2 4 9 4 6 22 26 31 28 5 MAXIMUM AIR TEMPERATURE (C) 23.0 23.2 23.4 26.1 32.1 35.3 35.5 35.8 35.5 33.6 28.1 24.9 29.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 24 30 31 31 30 30 7 0 185 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.0 26.5 26.6 31.0 37.8 39.2 37.2 37.4 38.0 36.0 31.0 27.0 39.2 DAY 12 22 5 19 25 28 11 10 21 7 6 4 DIF. BETWEEN (MAX.-MIN.) (C) 5.1 4.5 4.5 5.0 6.6 6.0 4.6 4.6 5.4 5.5 4.9 4.7 5.1 MEAN DAILY TEMP. (MDT) (C) 20.5 20.9 21.1 23.6 28.8 32.3 33.2 33.5 32.8 30.8 25.7 22.6 27.2 COOLING DEG. DAYS(BASE 21 0C) 9.6 15.3 17.1 80.0 241.7 339.7 378.7 388.0 354.5 304.7 139.8 49.5 2318.7 HEATING DEG. DAYS(BASE 18 0C) 0.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.7 DEWPOINT (MEAN C) 13.9 13.1 15.8 19.0 22.8 26.8 28.2 28.4 27.5 23.2 18.2 15.3 21.0 MIXING RATIO (G/KG) 10.08 9.72 11.44 14.05 17.88 22.92 24.91 25.19 23.67 18.41 13.37 10.96 16.88 VAPOUR PRESSURE (HPA) 16.20 15.62 18.28 22.31 28.10 35.49 38.33 38.87 36.83 29.04 21.34 17.60 26.50 SATURATION DEF. (HPA) 8.83 9.90 7.74 8.20 12.81 14.09 13.51 14.00 15.17 17.20 12.94 10.59 12.08 RELATIVE HUMIDITY (MEAN %) 65 61 71 74 70 73 74 74 71 63 62 63 68 RELATIVE HUMIDITY (MAX. %) 74 73 82 86 84 86 84 84 82 74 71 72 79 RELATIVE HUMIDITY (MIN. %) 58 53 62 64 56 57 66 66 64 54 56 56 59 RELATIVE HUMIDITY (MEAN% 03UTC) 73 71 79 84 82 86 83 84 81 71 68 69 78 RELATIVE HUMIDITY (MEAN% 09UTC) 61 57 65 68 64 70 71 69 66 58 60 58 64 RELATIVE HUMIDITY (MEAN% 15UTC) 66 63 73 74 72 68 75 73 73 65 63 66 69 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 65.5 0.0 143.4 4.0 0.0 0.0 0.0 0.0 0.0 33.6 47.2 18.5 312.2 DAYS WITH PRECIPITATION >=10 1 0 7 0 0 0 0 0 0 1 2 1 12 DAYS WITH PRECIPITATION >= 5 3 0 7 0 0 0 0 0 0 1 2 1 14 DAYS WITH PRECIPITATION >= 1 3 0 9 2 0 0 0 0 0 2 5 3 24 DAYS WITH PRECIPITATION 4 0 11 2 0 0 0 0 0 3 6 7 33 GREATEST DAILY PRECIPITATION 52.0 0.0 35.0 2.0 0.0 0.0 0.0 0.0 0.0 30.0 23.0 13.4 52.0 DAY 25 ** 29 23 ** ** ** ** ** 31 12 5 DAY WITH THUNDER STORM 1 0 3 1 0 0 0 0 0 2 5 2 14 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 2 2 3 2 0 2 1 1 3 0 2 20 WIND DIRECTION (PREVAILING) 270 270 270 270 270 225 270 270 225 270 90 270 270 PREVAILING WIND SPEED(KNOTS) 7.6 9.9 9.6 10.3 10.8 7.0 9.8 8.3 6.5 9.8 8.9 9.9 9.7 PREVAILING WIND PERCENT 18.1 38.6 30.3 28.7 43.2 18.7 23.9 20.0 17.3 27.1 24.0 29.7 26.0 CALMS PERCENT OF WIND 38.7 26.4 26.5 24.0 21.3 28.7 32.3 38.7 42.7 33.5 21.3 28.4 30.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 304 294 291 271 261 279 259 227 197 245 14 283 276 VECTOR WIND MAGNITUDE(KNOTS) 0.6 5.3 2.7 3.5 6.4 1.6 1.7 0.7 0.9 2.3 1.9 2.0 2.1 WIND STEADINESES (MEAN %) 12.2 77.9 39.7 55.6 86.5 29.1 29.8 14.9 20.9 37.1 24.4 26.3 33.9 WIND SPEED (MEAN KNOTS) 4.9 6.8 6.8 6.3 7.4 5.5 5.7 4.7 4.3 6.2 7.8 7.6 6.2 FASTEST WIND DIRECTION 220 300 240 290 280 300 290 110 250 260 210 60 210 FASTEST WIND SPEED (KNOTS) 21 23 19 17 17 14 16 16 16 17 25 25 25 DAY 25 1 16 12 26 3 11 15 4 21 12 29 DAYS WITH SKY CLEAR (0-2)/8 21 24 10 23 28 28 28 30 30 24 13 6 265 DAYS WITH P.CLOUDY (3-6)/8 8 3 9 3 3 2 3 1 0 6 14 22 74 DAYS WITH CLOUDY (7-8)/8 2 1 12 4 0 0 0 0 0 1 3 3 26 DAYS WITH VISIBILITY =< 2 KM 2 1 2 2 4 6 3 3 3 4 0 0 30 DURATION OF SUNSHINE HOURS 249.2 257.8 209.5 272.9 344.8 343.4 311.3 311.2 308.7 281.1 226.3 213.9 3330.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1016.8 1016.1 1013.0 1010.8 1006.7 999.7 995.7 998.9 1004.9 1011.8 1015.0 1016.8 1008.9 MAX. QFE PRESSURE IN HPA 1022.3 1020.5 1020.6 1017.3 1011.8 1007.9 999.5 1004.8 1010.7 1016.8 1019.6 1023.0 1023.0 DAY-HOUR 11- 6 7- 6 1- 6 13- 6 1- 6 4- 6 25- 6 16- 6 19- 6 31- 6 30- 6 29- 6 MIN. QFE PRESSURE IN HPA 1005.0 1011.2 1005.3 1006.4 1000.0 989.3 990.7 992.9 1000.3 1005.7 1010.9 1011.3 989.3 DAY-HOUR 17-12 23-15 25-15 10-15 30-15 29-15 11-12 1-15 2-15 1- 3 24-12 11-12 MEAN QNH PRESSURE IN HPA 1017.1 1016.3 1013.3 1011.1 1006.9 1000.0 995.9 999.1 1005.1 1012.0 1015.2 1017.1 1009.1 MAX. QNH PRESSURE IN HPA 1022.5 1020.7 1020.8 1017.5 1012.0 1008.1 999.7 1005.0 1010.9 1017.0 1019.8 1023.2 1023.2 DAY-HOUR 11- 6 7- 6 1- 6 13- 6 1- 6 4- 6 25- 6 16- 6 19- 6 31- 6 30- 6 29- 6 MIN. QNH PRESSURE IN HPA 1005.2 1011.4 1005.5 1006.6 1000.2 989.5 990.9 993.1 1000.5 1005.9 1011.1 1011.5 989.5 DAY-HOUR 17-12 23-15 25-15 10-15 30-15 29-15 11-12 1-15 2-15 1- 3 24-12 11-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1015.6 1012.8 1010.5 1006.6 999.7 995.9 999.1 1004.9 1011.7 1014.9 1016.6 1008.8 MAX. QFE PRESSURE IN HPA 1020.6 1018.8 1018.8 1015.7 1010.5 1006.1 998.4 1003.5 1009.2 1014.5 1018.1 1020.7 1020.7 DAY 11 13 10 13 1 5 22 16 19 31 30 30 MIN. QFE PRESSURE IN HPA 1009.6 1012.1 1006.3 1007.9 1001.6 990.0 991.2 993.4 1001.4 1005.7 1011.5 1011.5 990.0 DAY 17 23 25 29 30 29 11 1 3 1 24 11 MEAN QNH PRESSURE IN HPA 1017.1 1015.9 1013.1 1010.8 1006.8 999.9 996.1 999.3 1005.2 1011.9 1015.1 1016.9 1009.0 MAX. QNH PRESSURE IN HPA 1020.8 1019.0 1019.0 1015.9 1010.7 1006.3 998.6 1003.7 1009.4 1014.7 1018.3 1020.9 1020.9 DAY 11 13 10 13 1 5 22 16 19 31 30 30 MIN. QNH PRESSURE IN HPA 1009.8 1012.3 1006.5 1008.1 1001.8 990.2 991.4 993.6 1001.6 1005.9 1011.7 1011.7 990.2 DAY 17 23 25 29 30 29 11 1 3 1 24 11 MEAN QFF PRESSURE IN HPA 1017.3 1016.1 1013.4 1011.0 1007.1 1000.2 996.3 999.6 1005.4 1012.2 1015.4 1017.1 1009.3 MAX. QFF PRESSURE IN HPA 1021.1 1019.3 1019.3 1016.2 1011.0 1006.6 998.9 1004.0 1009.7 1015.0 1018.6 1021.2 1021.2 DAY 11 13 10 13 1 5 22 16 19 31 30 30 MIN. QFF PRESSURE IN HPA 1010.1 1012.6 1006.8 1008.4 1002.1 990.5 991.7 993.9 1001.9 1006.2 1012.0 1012.0 990.5 DAY 17 23 25 29 30 29 11 1 3 1 24 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1018.6 1017.8 1014.6 1012.3 1007.9 1001.0 996.9 1000.2 1006.4 1013.3 1016.5 1018.5 1010.3 MAX. QFE PRESSURE IN HPA 1022.3 1020.5 1020.6 1017.3 1011.8 1007.9 999.5 1004.8 1010.7 1016.8 1019.6 1023.0 1023.0 DAY 11 7 1 13 1 4 25 16 19 31 30 29 MIN. QFE PRESSURE IN HPA 1010.4 1015.0 1008.4 1009.7 1002.4 991.4 991.8 995.1 1002.7 1007.9 1013.4 1013.1 991.4 DAY 17 23 25 27 30 29 11 1 3 1 24 11 MEAN QNH PRESSURE IN HPA 1018.8 1018.0 1014.9 1012.5 1008.1 1001.2 997.1 1000.4 1006.6 1013.6 1016.8 1018.7 1010.6 MAX. QNH PRESSURE IN HPA 1022.5 1020.7 1020.8 1017.5 1012.0 1008.1 999.7 1005.0 1010.9 1017.0 1019.8 1023.2 1023.2 DAY 11 7 1 13 1 4 25 16 19 31 30 29 MIN. QNH PRESSURE IN HPA 1010.6 1015.2 1008.6 1009.9 1002.6 991.6 992.0 995.3 1002.9 1008.1 1013.6 1013.3 991.6 DAY 17 23 25 27 30 29 11 1 3 1 24 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.2 1016.8 1013.7 1011.6 1007.4 1000.6 996.4 999.5 1005.6 1012.1 1015.1 1016.8 1009.4 MAX. QFE PRESSURE IN HPA 1020.8 1019.8 1020.2 1016.6 1011.6 1007.7 998.8 1003.9 1009.9 1016.1 1018.1 1020.8 1020.8 DAY 11 7 11 12 8 4 24 16 18 31 4 30 MIN. QFE PRESSURE IN HPA 1007.0 1013.6 1007.7 1008.7 1002.0 990.9 991.2 994.8 1002.6 1006.9 1011.9 1011.5 990.9 DAY 17 23 25 29 30 29 11 1 2 1 24 11 MEAN QNH PRESSURE IN HPA 1017.4 1017.0 1013.9 1011.9 1007.6 1000.8 996.6 999.7 1005.8 1012.4 1015.4 1017.1 1009.6 MAX. QNH PRESSURE IN HPA 1021.0 1020.0 1020.4 1016.8 1011.8 1007.9 999.0 1004.1 1010.1 1016.3 1018.3 1021.0 1021.0 DAY 11 7 11 12 8 4 24 16 18 31 4 30 MIN. QNH PRESSURE IN HPA 1007.2 1013.8 1007.9 1008.9 1002.2 991.1 991.4 995.0 1002.8 1007.1 1012.1 1011.7 991.1 DAY 17 23 25 29 30 29 11 1 2 1 24 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.6 1015.0 1011.9 1010.1 1005.9 999.1 995.1 998.0 1004.0 1010.7 1013.9 1015.8 1007.9 MAX. QFE PRESSURE IN HPA 1019.1 1018.5 1017.9 1015.0 1010.4 1005.6 997.3 1002.0 1008.2 1015.5 1017.7 1019.8 1019.8 DAY 10 7 1 12 8 4 23 31 18 31 4 29 MIN. QFE PRESSURE IN HPA 1005.0 1011.9 1005.9 1006.9 1000.3 989.4 990.7 993.7 1000.8 1005.7 1010.9 1011.3 989.4 DAY 17 23 5 29 30 29 11 1 2 1 24 11 MEAN QNH PRESSURE IN HPA 1015.9 1015.3 1012.2 1010.3 1006.2 999.3 995.3 998.2 1004.2 1011.0 1014.1 1016.0 1008.2 MAX. QNH PRESSURE IN HPA 1019.3 1018.7 1018.1 1015.2 1010.6 1005.8 997.5 1002.2 1008.4 1015.7 1017.9 1020.0 1020.0 DAY 10 7 1 12 8 4 23 31 18 31 4 29 MIN. QNH PRESSURE IN HPA 1005.2 1012.1 1006.1 1007.1 1000.5 989.6 990.9 993.9 1001.0 1005.9 1011.1 1011.5 989.6 DAY 17 23 5 29 30 29 11 1 2 1 24 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1015.1 1012.1 1009.7 1005.6 998.4 994.5 997.7 1003.8 1011.0 1014.6 1016.5 1007.9 MAX. QFE PRESSURE IN HPA 1019.6 1018.1 1018.3 1015.7 1010.4 1004.6 996.5 1001.8 1007.8 1015.5 1017.7 1020.4 1020.4 DAY 10 7 9 12 8 4 22 16 18 31 4 29 MIN. QFE PRESSURE IN HPA 1005.9 1011.2 1005.3 1006.4 1000.0 989.3 990.7 992.9 1000.3 1006.1 1011.6 1012.0 989.3 DAY 17 23 25 10 30 29 11 1 2 1 24 11 MEAN QNH PRESSURE IN HPA 1016.3 1015.4 1012.4 1009.9 1005.8 998.6 994.7 998.0 1004.0 1011.2 1014.8 1016.8 1008.2 MAX. QNH PRESSURE IN HPA 1019.8 1018.3 1018.5 1015.9 1010.6 1004.8 996.7 1002.0 1008.0 1015.7 1017.9 1020.6 1020.6 DAY 10 7 9 12 8 4 22 16 18 31 4 29 MIN. QNH PRESSURE IN HPA 1006.1 1011.4 1005.5 1006.6 1000.2 989.5 990.9 993.1 1000.5 1006.3 1011.8 1012.2 989.5 DAY 17 23 25 10 30 29 11 1 2 1 24 11 MEAN QFF PRESSURE IN HPA 1016.6 1015.7 1012.7 1010.2 1006.1 998.8 995.0 998.2 1004.2 1011.5 1015.1 1017.1 1008.4 MAX. QFF PRESSURE IN HPA 1020.1 1018.6 1018.8 1016.2 1010.9 1005.1 997.0 1002.3 1008.3 1016.0 1018.2 1020.9 1020.9 DAY 10 7 9 12 8 4 22 16 18 31 4 29 MIN. QFF PRESSURE IN HPA 1006.4 1011.7 1005.8 1006.9 1000.5 989.8 991.2 993.4 1000.8 1006.6 1012.1 1012.5 989.8 DAY 17 23 25 10 30 29 11 1 2 1 24 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.4 21.3 23.2 27.3 31.3 33.7 34.7 35.7 34.2 32.1 28.5 25.7 29.0 MINIMUN AIR TEMPERATURE (C) 17.7 18.2 20.3 23.5 26.9 30.2 32.0 32.9 31.0 28.6 24.8 22.0 25.7 DAYS WITH MINIMUM TEMP. >=21 2 5 12 27 31 30 31 31 30 31 30 28 288 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 14.4 15.2 16.5 20.4 22.5 28.5 29.4 31.8 28.4 26.0 22.0 20.0 14.4 DAY 13 18 6 15 6 1 24 29 25 29 30 9 MAXIMUM AIR TEMPERATURE (C) 22.4 23.1 25.3 30.0 34.4 36.4 36.9 37.6 36.2 34.1 30.9 27.7 31.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 3 15 29 30 31 31 30 31 24 2 226 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.0 26.5 31.6 35.6 39.6 40.8 40.5 40.0 39.0 36.8 32.6 30.0 40.8 DAY 1 10 30 21 25 12 3 19 17 7 17 4 DIF. BETWEEN (MAX.-MIN.) (C) 4.7 4.9 5.0 6.5 7.5 6.2 4.9 4.7 5.2 5.5 6.1 5.7 5.5 MEAN DAILY TEMP. (MDT) (C) 20.0 20.6 22.8 26.8 30.6 33.3 34.4 35.2 33.6 31.3 27.9 24.9 28.5 COOLING DEG. DAYS(BASE 21 0C) 8.5 16.9 62.6 172.5 299.1 368.7 416.8 441.2 378.2 320.7 206.6 120.5 2812.5 HEATING DEG. DAYS(BASE 18 0C) 3.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.6 DEWPOINT (MEAN C) 14.2 15.0 17.4 21.5 23.1 28.1 28.9 28.9 27.4 23.4 20.9 18.9 22.3 MIXING RATIO (G/KG) 10.40 10.92 12.74 16.59 18.16 24.77 26.02 26.03 23.56 18.53 15.71 13.83 18.10 VAPOUR PRESSURE (HPA) 16.71 17.51 20.31 26.19 28.49 38.26 39.97 40.11 36.62 29.16 24.98 22.10 28.37 SATURATION DEF. (HPA) 7.44 7.91 8.55 10.45 17.65 14.28 15.50 18.32 17.27 18.83 14.18 11.08 13.46 RELATIVE HUMIDITY (MEAN %) 69 68 71 72 64 74 73 69 68 61 65 68 69 RELATIVE HUMIDITY (MAX. %) 78 78 82 83 78 87 82 80 81 73 77 79 80 RELATIVE HUMIDITY (MIN. %) 62 61 61 61 51 62 64 60 60 53 57 60 59 RELATIVE HUMIDITY (MEAN% 03UTC) 76 76 80 81 77 87 81 80 81 72 76 78 79 RELATIVE HUMIDITY (MEAN% 09UTC) 66 64 67 67 58 71 71 66 63 56 60 63 64 RELATIVE HUMIDITY (MEAN% 15UTC) 70 72 70 73 62 68 71 66 66 62 66 69 68 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 53.3 10.0 18.6 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.0 88.7 DAYS WITH PRECIPITATION >=10 1 0 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 1 1 1 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 1 6 3 1 0 0 0 0 0 0 0 0 1 11 DAYS WITH PRECIPITATION 8 3 4 1 0 0 0 0 0 0 0 1 17 GREATEST DAILY PRECIPITATION 39.0 6.0 17.0 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.0 39.0 DAY 3 13 2 23 ** ** ** ** ** ** ** 19 DAY WITH THUNDER STORM 0 0 1 1 0 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 4 4 4 7 4 2 5 5 3 4 1 0 43 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 45 90 90 270 270 45 270 PREVAILING WIND SPEED(KNOTS) 12.5 14.8 12.0 13.1 12.6 10.4 10.6 10.2 6.1 8.2 8.7 9.6 11.4 PREVAILING WIND PERCENT 32.3 22.1 25.8 37.3 43.2 21.3 23.2 14.8 14.7 19.4 16.0 17.4 22.6 CALMS PERCENT OF WIND 23.9 26.4 14.2 30.0 18.1 24.7 15.5 27.7 41.3 35.5 53.3 49.7 30.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 270 18 319 264 268 251 41 150 210 327 293 29 277 VECTOR WIND MAGNITUDE(KNOTS) 3.2 1.0 2.8 5.4 7.0 3.2 1.4 1.6 1.3 0.6 1.5 2.0 1.7 WIND STEADINESES (MEAN %) 35.6 10.4 29.2 70.1 77.8 49.2 16.7 25.8 28.9 10.5 45.5 47.6 24.3 WIND SPEED (MEAN KNOTS) 9.0 9.6 9.6 7.7 9.0 6.5 8.4 6.2 4.5 5.7 3.3 4.2 7.0 FASTEST WIND DIRECTION 300 300 60 290 280 270 290 120 110 60 300 60 290 FASTEST WIND SPEED (KNOTS) 23 27 23 29 21 16 21 17 16 21 16 16 29 DAY 6 13 1 6 1 1 9 23 9 11 13 10 DAYS WITH SKY CLEAR (0-2)/8 12 19 19 25 27 30 27 28 29 31 29 24 300 DAYS WITH P.CLOUDY (3-6)/8 12 7 7 3 3 0 4 3 1 0 1 5 46 DAYS WITH CLOUDY (7-8)/8 7 2 5 2 1 0 0 0 0 0 0 2 19 DAYS WITH VISIBILITY =< 2 KM 3 1 4 4 3 11 4 6 7 4 2 3 52 DURATION OF SUNSHINE HOURS 197.8 243.8 255.7 299.2 346.1 353.3 330.3 329.8 293.3 312.9 292.9 262.0 3517.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1017.1 1016.0 1013.3 1009.6 1005.6 999.5 995.8 999.1 1003.7 1009.6 1014.5 1016.7 1008.4 MAX. QFE PRESSURE IN HPA 1023.0 1022.1 1019.1 1016.7 1011.9 1004.9 1001.1 1005.1 1009.2 1016.7 1019.6 1021.7 1023.0 DAY-HOUR 4- 6 4- 6 6- 6 12- 6 8- 6 5- 6 22- 6 24- 6 26- 6 25- 6 30- 6 7- 6 MIN. QFE PRESSURE IN HPA 1009.5 1008.8 1006.6 1003.3 999.7 991.9 990.4 993.2 998.8 1003.7 1009.7 1011.3 990.4 DAY-HOUR 13- 3 12-12 15-12 21-15 30-15 30-15 8-15 13-15 1-15 1-12 17-12 21-12 MEAN QNH PRESSURE IN HPA 1017.3 1016.2 1013.6 1009.8 1005.8 999.7 996.0 999.3 1003.9 1009.9 1014.7 1017.0 1008.6 MAX. QNH PRESSURE IN HPA 1023.2 1022.3 1019.3 1016.9 1012.1 1005.1 1001.3 1005.3 1009.4 1016.9 1019.8 1021.9 1023.2 DAY-HOUR 4- 6 4- 6 6- 6 12- 6 8- 6 5- 6 22- 6 24- 6 26- 6 25- 6 30- 6 7- 6 MIN. QNH PRESSURE IN HPA 1009.7 1009.0 1006.8 1003.5 999.9 992.1 990.6 993.4 999.0 1003.9 1009.9 1011.5 990.6 DAY-HOUR 13- 3 12-12 15-12 21-15 30-15 30-15 8-15 13-15 1-15 1-12 17-12 21-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1015.8 1013.1 1009.1 1005.3 999.6 996.0 999.4 1003.9 1009.6 1014.6 1016.8 1008.3 MAX. QFE PRESSURE IN HPA 1021.2 1020.0 1016.9 1015.5 1010.3 1004.0 1000.2 1003.8 1008.2 1015.0 1017.5 1020.2 1021.2 DAY 4 4 12 12 8 5 23 24 26 29 30 10 MIN. QFE PRESSURE IN HPA 1009.5 1011.2 1007.3 1004.0 1000.5 993.5 990.9 994.2 1000.5 1004.3 1011.8 1012.2 990.9 DAY 13 13 30 21 30 30 8 13 1 1 18 21 MEAN QNH PRESSURE IN HPA 1017.0 1016.0 1013.3 1009.3 1005.5 999.8 996.3 999.6 1004.1 1009.8 1014.9 1017.0 1008.6 MAX. QNH PRESSURE IN HPA 1021.4 1020.2 1017.1 1015.7 1010.5 1004.2 1000.4 1004.0 1008.4 1015.2 1017.7 1020.4 1021.4 DAY 4 4 12 12 8 5 23 24 26 29 30 10 MIN. QNH PRESSURE IN HPA 1009.7 1011.4 1007.5 1004.2 1000.7 993.7 991.1 994.4 1000.7 1004.5 1012.0 1012.4 991.1 DAY 13 13 30 21 30 30 8 13 1 1 18 21 MEAN QFF PRESSURE IN HPA 1017.3 1016.3 1013.6 1009.6 1005.8 1000.1 996.5 999.8 1004.4 1010.1 1015.1 1017.3 1008.8 MAX. QFF PRESSURE IN HPA 1021.7 1020.5 1017.4 1016.0 1010.8 1004.5 1000.7 1004.3 1008.7 1015.5 1018.0 1020.7 1021.7 DAY 4 4 12 12 8 5 23 24 26 29 30 10 MIN. QFF PRESSURE IN HPA 1010.0 1011.7 1007.8 1004.5 1001.0 994.0 991.4 994.7 1001.0 1004.8 1012.3 1012.7 991.4 DAY 13 13 30 21 30 30 8 13 1 1 18 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1018.7 1017.7 1014.7 1011.0 1006.8 1000.7 997.1 1000.6 1005.3 1011.2 1016.1 1018.6 1009.9 MAX. QFE PRESSURE IN HPA 1023.0 1022.1 1019.1 1016.7 1011.9 1004.9 1001.1 1005.1 1009.2 1016.7 1019.6 1021.7 1023.0 DAY 4 4 6 12 8 5 22 24 26 25 30 7 MIN. QFE PRESSURE IN HPA 1013.3 1012.4 1009.9 1005.6 1001.2 994.1 991.6 995.5 1001.9 1005.9 1013.1 1013.8 991.6 DAY 13 12 15 21 30 30 8 13 2 1 17 21 MEAN QNH PRESSURE IN HPA 1018.9 1017.9 1014.9 1011.2 1007.0 1000.9 997.3 1000.9 1005.5 1011.4 1016.3 1018.8 1010.1 MAX. QNH PRESSURE IN HPA 1023.2 1022.3 1019.3 1016.9 1012.1 1005.1 1001.3 1005.3 1009.4 1016.9 1019.8 1021.9 1023.2 DAY 4 4 6 12 8 5 22 24 26 25 30 7 MIN. QNH PRESSURE IN HPA 1013.5 1012.6 1010.1 1005.8 1001.4 994.3 991.8 995.7 1002.1 1006.1 1013.3 1014.0 991.8 DAY 13 12 15 21 30 30 8 13 2 1 17 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.3 1016.6 1014.0 1010.4 1006.2 1000.2 996.4 999.8 1004.3 1009.9 1014.6 1016.7 1008.9 MAX. QFE PRESSURE IN HPA 1020.8 1020.6 1017.6 1016.1 1011.3 1004.4 1000.6 1003.8 1008.1 1015.3 1018.2 1019.6 1020.8 DAY 4 4 4 12 8 5 22 25 25 25 30 7 MIN. QFE PRESSURE IN HPA 1012.3 1010.7 1009.1 1005.6 1000.3 993.6 991.6 994.9 1000.9 1005.2 1011.3 1011.9 991.6 DAY 2 12 15 21 30 30 8 13 1 1 17 21 MEAN QNH PRESSURE IN HPA 1017.5 1016.8 1014.2 1010.7 1006.5 1000.4 996.7 1000.1 1004.5 1010.2 1014.8 1016.9 1009.1 MAX. QNH PRESSURE IN HPA 1021.0 1020.8 1017.8 1016.3 1011.5 1004.6 1000.8 1004.0 1008.3 1015.5 1018.4 1019.8 1021.0 DAY 4 4 4 12 8 5 22 25 25 25 30 7 MIN. QNH PRESSURE IN HPA 1012.5 1010.9 1009.3 1005.8 1000.5 993.8 991.8 995.1 1001.1 1005.4 1011.5 1012.1 991.8 DAY 2 12 15 21 30 30 8 13 1 1 17 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1014.8 1012.3 1008.8 1004.9 998.8 995.0 998.2 1002.6 1008.6 1013.3 1015.5 1007.4 MAX. QFE PRESSURE IN HPA 1019.5 1019.0 1016.0 1014.1 1009.6 1002.7 999.4 1001.9 1006.4 1014.2 1016.9 1018.3 1019.5 DAY 4 4 6 12 7 5 22 25 25 25 30 6 MIN. QFE PRESSURE IN HPA 1010.9 1008.8 1006.6 1003.8 1000.3 992.5 990.6 993.9 999.1 1003.7 1009.7 1011.3 990.6 DAY 2 12 15 22 30 30 8 13 1 1 17 21 MEAN QNH PRESSURE IN HPA 1016.3 1015.0 1012.6 1009.1 1005.1 999.0 995.3 998.4 1002.9 1008.8 1013.5 1015.7 1007.6 MAX. QNH PRESSURE IN HPA 1019.7 1019.2 1016.2 1014.3 1009.8 1002.9 999.6 1002.1 1006.6 1014.4 1017.1 1018.5 1019.7 DAY 4 4 6 12 7 5 22 25 25 25 30 6 MIN. QNH PRESSURE IN HPA 1011.1 1009.0 1006.8 1004.0 1000.5 992.7 990.8 994.1 999.3 1003.9 1009.9 1011.5 990.8 DAY 2 12 15 22 30 30 8 13 1 1 17 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1015.3 1012.6 1008.6 1004.6 998.2 994.5 997.6 1002.4 1009.0 1013.9 1016.3 1007.5 MAX. QFE PRESSURE IN HPA 1021.0 1019.3 1016.7 1013.7 1010.1 1002.5 998.8 1000.9 1006.3 1014.7 1017.5 1019.6 1021.0 DAY 4 3 4 11 7 19 23 24 25 25 30 6 MIN. QFE PRESSURE IN HPA 1011.7 1009.3 1007.0 1003.3 999.7 991.9 990.4 993.2 998.8 1003.7 1009.7 1012.2 990.4 DAY 29 12 15 21 30 30 8 13 1 1 17 21 MEAN QNH PRESSURE IN HPA 1017.0 1015.6 1012.9 1008.8 1004.8 998.4 994.7 997.8 1002.6 1009.2 1014.2 1016.5 1007.7 MAX. QNH PRESSURE IN HPA 1021.2 1019.5 1016.9 1013.9 1010.3 1002.7 999.0 1001.1 1006.5 1014.9 1017.7 1019.8 1021.2 DAY 4 3 4 11 7 19 23 24 25 25 30 6 MIN. QNH PRESSURE IN HPA 1011.9 1009.5 1007.2 1003.5 999.9 992.1 990.6 993.4 999.0 1003.9 1009.9 1012.4 990.6 DAY 29 12 15 21 30 30 8 13 1 1 17 21 MEAN QFF PRESSURE IN HPA 1017.3 1015.8 1013.1 1009.1 1005.1 998.7 995.0 998.1 1002.9 1009.5 1014.4 1016.8 1008.0 MAX. QFF PRESSURE IN HPA 1021.5 1019.8 1017.2 1014.2 1010.6 1003.0 999.3 1001.4 1006.8 1015.2 1018.0 1020.1 1021.5 DAY 4 3 4 11 7 19 23 24 25 25 30 6 MIN. QFF PRESSURE IN HPA 1012.2 1009.8 1007.5 1003.8 1000.2 992.4 990.9 993.7 999.3 1004.2 1010.2 1012.7 990.9 DAY 29 12 15 21 30 30 8 13 1 1 17 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 22.6 23.1 23.5 28.0 30.9 33.1 33.9 34.8 33.5 31.6 28.6 24.3 29.0 MINIMUN AIR TEMPERATURE (C) 20.0 20.3 20.2 24.3 27.2 30.1 31.2 32.3 30.9 28.5 25.8 21.2 26.0 DAYS WITH MINIMUM TEMP. >=21 8 11 10 30 31 30 31 31 30 31 30 16 289 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 17.0 16.2 17.2 21.0 24.0 28.4 29.2 30.4 30.0 27.0 22.4 18.0 16.2 DAY 6 13 20 2 5 8 4 6 10 5 30 25 MAXIMUM AIR TEMPERATURE (C) 24.4 24.6 25.4 30.8 33.8 35.2 35.7 36.7 35.2 33.5 30.5 26.1 31.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 18 30 30 31 31 30 31 17 0 218 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.8 26.6 28.8 36.0 40.8 38.2 38.2 41.6 37.6 35.4 33.4 28.6 41.6 DAY 1 26 23 28 11 1 1 8 1 3 3 3 DIF. BETWEEN (MAX.-MIN.) (C) 4.4 4.3 5.2 6.5 6.6 5.1 4.5 4.4 4.3 5.0 4.7 4.9 5.0 MEAN DAILY TEMP. (MDT) (C) 22.2 22.5 22.8 27.5 30.5 32.7 33.4 34.5 33.1 31.0 28.1 23.7 28.5 COOLING DEG. DAYS(BASE 21 0C) 43.2 43.7 56.0 195.4 294.3 349.6 385.9 417.4 362.7 309.7 214.1 82.9 2755.0 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DEWPOINT (MEAN C) 14.2 17.9 16.2 20.5 23.4 28.2 28.1 28.9 26.5 24.6 18.8 15.6 21.9 MIXING RATIO (G/KG) 10.28 13.01 11.92 15.46 18.68 24.81 24.81 25.90 22.31 19.73 13.89 11.20 17.67 VAPOUR PRESSURE (HPA) 16.50 20.78 18.99 24.45 29.21 38.31 38.18 39.90 34.72 31.02 22.12 18.00 27.68 SATURATION DEF. (HPA) 11.12 7.53 10.03 13.69 15.73 12.32 14.75 15.97 17.18 15.64 17.27 12.55 13.65 RELATIVE HUMIDITY (MEAN %) 60 74 65 66 67 76 73 72 67 67 56 59 67 RELATIVE HUMIDITY (MAX. %) 67 83 76 79 80 87 83 82 77 77 66 68 77 RELATIVE HUMIDITY (MIN. %) 53 67 57 53 54 67 65 63 60 59 50 52 58 RELATIVE HUMIDITY (MEAN% 03UTC) 65 81 76 77 79 87 81 81 77 77 64 65 76 RELATIVE HUMIDITY (MEAN% 09UTC) 57 71 61 64 63 72 68 70 63 62 52 56 63 RELATIVE HUMIDITY (MEAN% 15UTC) 62 74 65 63 65 76 72 70 67 68 59 61 67 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 11.4 54.0 11.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 76.4 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 1 1 0 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 1 3 2 3 0 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION 5 3 4 0 0 0 0 0 0 0 0 0 12 GREATEST DAILY PRECIPITATION 6.0 50.0 8.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 50.0 DAY 25 13 2 ** ** ** ** ** ** ** ** ** DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 3 2 3 6 2 8 5 2 0 1 0 35 WIND DIRECTION (PREVAILING) 270 45 270 270 270 225 225 90 90 225 270 45 270 PREVAILING WIND SPEED(KNOTS) 10.8 10.5 10.2 11.6 12.2 9.1 9.0 11.0 9.5 8.2 10.9 11.3 10.5 PREVAILING WIND PERCENT 31.6 17.9 33.5 30.7 29.0 29.3 18.1 32.3 20.7 16.1 25.3 25.8 19.3 CALMS PERCENT OF WIND 10.3 29.3 18.1 20.0 32.3 16.7 16.8 24.5 34.7 36.8 37.3 25.8 25.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 331 84 289 277 285 227 143 84 116 193 281 30 282 VECTOR WIND MAGNITUDE(KNOTS) 1.2 2.1 2.5 4.7 4.8 2.9 1.1 3.5 2.3 2.1 3.9 3.1 0.7 WIND STEADINESES (MEAN %) 12.5 29.2 30.1 59.5 69.6 40.3 13.6 50.7 39.7 38.2 60.9 37.8 9.6 WIND SPEED (MEAN KNOTS) 9.6 7.2 8.3 7.9 6.9 7.2 8.1 6.9 5.8 5.5 6.4 8.2 7.3 FASTEST WIND DIRECTION 180 160 280 290 290 230 70 90 70 140 290 60 160 FASTEST WIND SPEED (KNOTS) 21 29 21 21 21 16 19 21 16 17 23 21 29 DAY 18 6 17 10 4 22 14 27 20 16 4 6 DAYS WITH SKY CLEAR (0-2)/8 18 11 23 29 31 30 30 30 30 31 27 26 316 DAYS WITH P.CLOUDY (3-6)/8 10 10 4 1 0 0 1 1 0 0 3 5 35 DAYS WITH CLOUDY (7-8)/8 3 7 4 0 0 0 0 0 0 0 0 0 14 DAYS WITH VISIBILITY =< 2 KM 0 3 2 4 4 7 11 4 1 3 1 0 40 DURATION OF SUNSHINE HOURS 216.4 202.5 262.7 318.4 345.4 329.7 308.5 308.4 303.2 308.9 275.6 265.2 3444.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1015.9 1015.4 1011.4 1008.6 1002.6 998.9 996.0 998.3 1003.1 1009.6 1014.0 1017.7 1007.6 MAX. QFE PRESSURE IN HPA 1019.9 1020.9 1016.2 1014.2 1008.6 1004.9 1001.8 1004.9 1009.6 1014.5 1019.6 1021.8 1021.8 DAY-HOUR 12- 6 12- 6 20- 6 11- 6 1- 6 1- 6 8- 6 19- 6 29- 6 23- 6 14- 6 24- 6 MIN. QFE PRESSURE IN HPA 1008.1 1009.6 1006.7 1003.0 997.0 995.0 991.3 993.1 998.8 1005.0 1007.4 1013.1 991.3 DAY-HOUR 18-12 6- 3 13-12 27-15 21-15 22-15 20-12 13-15 10-15 8-12 1-12 31-12 MEAN QNH PRESSURE IN HPA 1016.2 1015.7 1011.7 1008.8 1002.8 999.1 996.3 998.5 1003.3 1009.8 1014.2 1017.9 1007.9 MAX. QNH PRESSURE IN HPA 1020.1 1021.1 1016.4 1014.4 1008.8 1005.1 1002.0 1005.1 1009.8 1014.7 1019.8 1022.0 1022.0 DAY-HOUR 12- 6 12- 6 20- 6 11- 6 1- 6 1- 6 8- 6 19- 6 29- 6 23- 6 14- 6 24- 6 MIN. QNH PRESSURE IN HPA 1008.3 1009.8 1006.9 1003.2 997.2 995.2 991.5 993.3 999.0 1005.2 1007.6 1013.3 991.5 DAY-HOUR 18-12 6- 3 13-12 27-15 21-15 22-15 20-12 13-15 10-15 8-12 1-12 31-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1015.8 1015.2 1011.2 1008.3 1002.5 999.0 996.3 998.5 1003.2 1009.8 1014.0 1017.8 1007.6 MAX. QFE PRESSURE IN HPA 1018.2 1018.6 1014.8 1012.3 1007.3 1004.1 1001.2 1003.8 1008.1 1012.7 1017.6 1019.8 1019.8 DAY 16 12 20 11 1 2 8 19 29 16 14 23 MIN. QFE PRESSURE IN HPA 1009.6 1009.6 1007.6 1004.4 997.7 995.9 992.3 993.5 1000.0 1006.8 1009.5 1014.5 992.3 DAY 18 6 2 27 21 24 20 7 6 3 1 31 MEAN QNH PRESSURE IN HPA 1016.0 1015.4 1011.4 1008.5 1002.7 999.2 996.6 998.7 1003.5 1010.0 1014.2 1018.1 1007.9 MAX. QNH PRESSURE IN HPA 1018.4 1018.8 1015.0 1012.5 1007.5 1004.3 1001.4 1004.0 1008.3 1012.9 1017.8 1020.0 1020.0 DAY 16 12 20 11 1 2 8 19 29 16 14 23 MIN. QNH PRESSURE IN HPA 1009.8 1009.8 1007.8 1004.6 997.9 996.1 992.5 993.7 1000.2 1007.0 1009.7 1014.7 992.5 DAY 18 6 2 27 21 24 20 7 6 3 1 31 MEAN QFF PRESSURE IN HPA 1016.3 1015.7 1011.7 1008.8 1003.0 999.5 996.8 999.0 1003.7 1010.3 1014.5 1018.3 1008.1 MAX. QFF PRESSURE IN HPA 1018.7 1019.1 1015.3 1012.8 1007.8 1004.6 1001.7 1004.3 1008.6 1013.2 1018.1 1020.3 1020.3 DAY 16 12 20 11 1 2 8 19 29 16 14 24 MIN. QFF PRESSURE IN HPA 1010.1 1010.1 1008.1 1004.9 998.2 996.4 992.8 994.0 1000.5 1007.3 1010.0 1015.0 992.8 DAY 18 6 2 27 21 24 20 7 6 3 1 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1017.1 1013.0 1010.1 1003.9 1000.1 997.3 999.7 1004.7 1011.3 1015.6 1019.4 1009.1 MAX. QFE PRESSURE IN HPA 1019.9 1020.9 1016.2 1014.2 1008.6 1004.9 1001.8 1004.9 1009.6 1014.5 1019.6 1021.8 1021.8 DAY 12 12 20 11 1 1 8 19 29 23 14 24 MIN. QFE PRESSURE IN HPA 1010.7 1012.8 1010.3 1005.9 999.6 997.2 993.5 994.7 1002.0 1008.0 1010.1 1015.9 993.5 DAY 18 6 28 27 21 24 20 7 10 8 1 31 MEAN QNH PRESSURE IN HPA 1017.7 1017.3 1013.2 1010.4 1004.1 1000.4 997.5 999.9 1004.9 1011.5 1015.8 1019.7 1009.4 MAX. QNH PRESSURE IN HPA 1020.1 1021.1 1016.4 1014.4 1008.8 1005.1 1002.0 1005.1 1009.8 1014.7 1019.8 1022.0 1022.0 DAY 12 12 20 11 1 1 8 19 29 23 14 24 MIN. QNH PRESSURE IN HPA 1010.9 1013.0 1010.5 1006.1 999.8 997.4 993.7 994.9 1002.2 1008.2 1010.3 1016.1 993.7 DAY 18 6 28 27 21 24 20 7 10 8 1 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1016.3 1016.0 1012.1 1009.4 1003.4 999.5 996.6 998.9 1003.7 1009.9 1014.1 1017.8 1008.1 MAX. QFE PRESSURE IN HPA 1018.7 1019.4 1015.1 1013.7 1007.6 1004.7 1001.2 1003.9 1008.4 1012.9 1017.9 1020.1 1020.1 DAY 15 12 19 11 1 1 8 19 29 23 14 24 MIN. QFE PRESSURE IN HPA 1009.8 1012.4 1009.6 1005.3 999.3 996.4 992.2 994.7 1000.9 1006.5 1008.4 1014.2 992.2 DAY 18 28 28 27 21 23 20 7 17 8 1 31 MEAN QNH PRESSURE IN HPA 1016.5 1016.3 1012.3 1009.6 1003.6 999.8 996.9 999.2 1003.9 1010.1 1014.3 1018.0 1008.4 MAX. QNH PRESSURE IN HPA 1018.9 1019.6 1015.3 1013.9 1007.8 1004.9 1001.4 1004.1 1008.6 1013.1 1018.1 1020.3 1020.3 DAY 15 12 19 11 1 1 8 19 29 23 14 24 MIN. QNH PRESSURE IN HPA 1010.0 1012.6 1009.8 1005.5 999.5 996.6 992.4 994.9 1001.1 1006.7 1008.6 1014.4 992.4 DAY 18 28 28 27 21 23 20 7 17 8 1 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.7 1014.2 1010.3 1007.8 1001.9 998.3 995.3 997.4 1002.1 1008.4 1012.9 1016.4 1006.6 MAX. QFE PRESSURE IN HPA 1017.6 1017.6 1013.5 1011.9 1006.5 1003.6 998.6 1002.2 1006.5 1011.9 1016.9 1018.8 1018.8 DAY 12 12 19 11 1 1 8 19 29 23 14 24 MIN. QFE PRESSURE IN HPA 1008.1 1009.9 1006.7 1003.4 998.3 995.7 991.3 993.6 999.2 1005.0 1007.4 1013.1 991.3 DAY 18 28 13 27 21 23 20 7 6 8 1 31 MEAN QNH PRESSURE IN HPA 1015.0 1014.5 1010.5 1008.0 1002.1 998.5 995.5 997.6 1002.3 1008.6 1013.1 1016.7 1006.9 MAX. QNH PRESSURE IN HPA 1017.8 1017.8 1013.7 1012.1 1006.7 1003.8 998.8 1002.4 1006.7 1012.1 1017.1 1019.0 1019.0 DAY 12 12 19 11 1 1 8 19 29 23 14 24 MIN. QNH PRESSURE IN HPA 1008.3 1010.1 1006.9 1003.6 998.5 995.9 991.5 993.8 999.4 1005.2 1007.6 1013.3 991.5 DAY 18 28 13 27 21 23 20 7 6 8 1 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1014.6 1010.6 1007.5 1001.3 997.7 994.7 997.0 1001.9 1008.8 1013.4 1017.1 1006.7 MAX. QFE PRESSURE IN HPA 1018.5 1017.3 1014.1 1011.4 1006.2 1003.3 998.2 1001.7 1006.5 1012.6 1017.6 1019.4 1019.4 DAY 12 17 19 11 1 1 8 19 29 23 14 24 MIN. QFE PRESSURE IN HPA 1008.6 1010.8 1007.6 1003.0 997.0 995.0 991.6 993.1 998.8 1005.3 1008.6 1014.1 991.6 DAY 18 27 1 27 21 22 20 13 10 3 1 31 MEAN QNH PRESSURE IN HPA 1015.7 1014.8 1010.8 1007.7 1001.5 997.9 994.9 997.2 1002.1 1009.0 1013.7 1017.3 1006.9 MAX. QNH PRESSURE IN HPA 1018.7 1017.5 1014.3 1011.6 1006.4 1003.5 998.4 1001.9 1006.7 1012.8 1017.8 1019.6 1019.6 DAY 12 17 19 11 1 1 8 19 29 23 14 24 MIN. QNH PRESSURE IN HPA 1008.8 1011.0 1007.8 1003.2 997.2 995.2 991.8 993.3 999.0 1005.5 1008.8 1014.3 991.8 DAY 18 27 1 27 21 22 20 13 10 3 1 31 MEAN QFF PRESSURE IN HPA 1016.0 1015.1 1011.1 1008.0 1001.8 998.2 995.2 997.4 1002.3 1009.3 1013.9 1017.6 1007.2 MAX. QFF PRESSURE IN HPA 1019.0 1017.8 1014.6 1011.9 1006.7 1003.8 998.7 1002.2 1007.0 1013.1 1018.1 1019.9 1019.9 DAY 12 17 19 11 1 1 8 19 29 23 14 24 MIN. QFF PRESSURE IN HPA 1009.1 1011.3 1008.1 1003.5 997.5 995.5 992.1 993.6 999.3 1005.8 1009.1 1014.6 992.1 DAY 18 27 1 27 21 22 20 13 10 3 1 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 22.4 21.7 23.3 28.3 30.9 31.9 34.8 34.9 33.1 31.0 26.6 23.1 28.5 MINIMUN AIR TEMPERATURE (C) 19.4 19.0 20.5 24.8 27.4 28.8 31.9 32.2 30.6 27.7 24.0 20.3 25.5 DAYS WITH MINIMUM TEMP. >=21 5 5 12 28 31 30 31 31 30 31 28 10 272 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 17.0 16.0 17.0 19.8 25.4 26.6 29.0 30.6 28.0 24.4 19.6 16.8 16.0 DAY 27 11 5 9 14 3 7 28 27 25 6 17 MAXIMUM AIR TEMPERATURE (C) 24.5 23.6 25.3 31.3 33.7 34.2 37.0 37.0 35.0 33.0 28.6 25.0 30.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 21 31 30 31 31 30 31 6 0 211 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.6 26.0 28.4 37.0 37.6 37.2 40.0 38.8 38.0 35.0 32.0 27.6 40.0 DAY 8 2 25 25 20 4 11 22 1 10 2 5 DIF. BETWEEN (MAX.-MIN.) (C) 5.1 4.6 4.8 6.5 6.3 5.4 5.1 4.8 4.4 5.3 4.6 4.7 5.2 MEAN DAILY TEMP. (MDT) (C) 21.9 21.3 22.9 28.0 30.5 31.5 34.5 34.6 32.8 30.4 26.3 22.6 28.1 COOLING DEG. DAYS(BASE 21 0C) 34.1 22.7 60.1 210.4 295.4 314.1 417.1 421.4 353.7 290.1 159.6 56.6 2635.3 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DEWPOINT (MEAN C) 14.0 13.6 15.4 21.2 23.5 26.2 28.7 27.7 26.6 23.6 18.7 16.1 21.3 MIXING RATIO (G/KG) 10.16 9.97 11.24 16.22 18.75 22.01 25.78 24.21 22.49 18.66 13.79 11.74 17.09 VAPOUR PRESSURE (HPA) 16.30 15.99 17.95 25.59 29.30 34.13 39.65 37.41 35.01 29.39 21.99 18.82 26.79 SATURATION DEF. (HPA) 10.94 10.01 10.73 13.37 15.49 13.29 16.17 18.71 15.71 15.58 13.03 9.59 13.55 RELATIVE HUMIDITY (MEAN %) 60 61 63 68 67 73 72 67 69 66 63 66 66 RELATIVE HUMIDITY (MAX. %) 71 73 73 83 78 85 83 82 78 75 72 75 77 RELATIVE HUMIDITY (MIN. %) 52 53 54 55 55 63 62 58 62 58 56 59 57 RELATIVE HUMIDITY (MEAN% 03UTC) 70 71 71 78 77 83 83 81 77 75 68 72 76 RELATIVE HUMIDITY (MEAN% 09UTC) 54 56 59 64 64 68 68 62 66 62 63 62 62 RELATIVE HUMIDITY (MEAN% 15UTC) 62 63 65 66 66 71 70 67 70 67 64 69 67 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 7.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 52.1 38.8 98.8 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 2 1 3 DAYS WITH PRECIPITATION >= 5 1 0 0 0 0 0 0 0 0 0 3 2 6 DAYS WITH PRECIPITATION >= 1 2 0 0 0 0 0 0 0 0 0 4 2 8 DAYS WITH PRECIPITATION 2 0 0 0 0 0 0 0 0 0 5 4 11 GREATEST DAILY PRECIPITATION 5.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25.0 30.0 30.0 DAY 17 ** ** ** ** ** ** ** ** ** 10 15 DAY WITH THUNDER STORM 1 0 0 0 0 0 0 0 0 0 2 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 6 3 4 5 7 3 7 9 4 0 0 51 WIND DIRECTION (PREVAILING) 270 270 270 270 270 225 225 225 270 270 45 270 270 PREVAILING WIND SPEED(KNOTS) 10.6 14.3 13.6 12.2 11.1 10.0 9.0 9.7 11.1 9.5 13.6 10.9 11.7 PREVAILING WIND PERCENT 29.7 31.0 45.2 30.0 35.5 34.7 20.6 23.2 20.7 19.4 20.7 18.1 24.2 CALMS PERCENT OF WIND 25.8 17.9 13.5 15.3 16.8 16.7 11.0 13.5 15.3 28.4 14.7 24.5 17.8 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 268 284 278 256 280 236 173 181 236 242 17 318 264 VECTOR WIND MAGNITUDE(KNOTS) 1.6 5.4 6.7 6.8 5.6 5.8 1.3 3.1 1.2 1.7 3.1 1.9 2.8 WIND STEADINESES (MEAN %) 20.8 55.1 62.6 71.6 64.4 75.3 16.0 35.2 14.5 25.0 28.7 24.4 32.2 WIND SPEED (MEAN KNOTS) 7.7 9.8 10.7 9.5 8.7 7.7 8.1 8.8 8.3 6.8 10.8 7.8 8.7 FASTEST WIND DIRECTION 260 300 290 290 300 260 70 70 300 330 60 190 290 FASTEST WIND SPEED (KNOTS) 21 23 29 23 21 17 17 19 19 27 25 23 29 DAY 11 3 3 12 12 8 19 12 2 4 17 11 DAYS WITH SKY CLEAR (0-2)/8 24 27 27 27 30 30 30 31 30 31 18 22 327 DAYS WITH P.CLOUDY (3-6)/8 5 2 4 3 1 0 1 0 0 0 9 6 31 DAYS WITH CLOUDY (7-8)/8 2 0 0 0 0 0 0 0 0 0 3 3 8 DAYS WITH VISIBILITY =< 2 KM 0 2 4 6 3 10 10 9 7 3 2 0 56 DURATION OF SUNSHINE HOURS 254.0 266.7 296.2 311.9 358.0 326.0 320.1 312.3 280.9 304.2 221.2 248.2 3499.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1015.6 1015.0 1012.6 1007.3 1002.2 999.0 996.6 998.9 1003.8 1010.0 1014.7 1017.0 1007.7 MAX. QFE PRESSURE IN HPA 1021.7 1021.3 1017.8 1014.5 1008.6 1003.6 1001.8 1004.3 1010.2 1015.0 1021.7 1023.4 1023.4 DAY-HOUR 30- 6 11- 6 4- 6 1- 6 6- 6 17- 6 26- 6 14- 6 23- 6 30- 6 30- 6 17- 6 MIN. QFE PRESSURE IN HPA 1009.3 1010.1 1008.7 1004.0 997.3 994.6 990.6 993.2 994.8 1003.8 1009.1 1011.9 990.6 DAY-HOUR 17-12 27-12 13-12 13-15 28-15 6-15 11-15 11-15 1-12 1-12 1-12 9-12 MEAN QNH PRESSURE IN HPA 1015.9 1015.3 1012.9 1007.5 1002.4 999.2 996.8 999.1 1004.0 1010.3 1015.0 1017.2 1008.0 MAX. QNH PRESSURE IN HPA 1021.9 1021.5 1018.0 1014.7 1008.8 1003.8 1002.0 1004.5 1010.4 1015.2 1021.9 1023.6 1023.6 DAY-HOUR 30- 6 11- 6 4- 6 1- 6 6- 6 17- 6 26- 6 14- 6 23- 6 30- 6 30- 6 17- 6 MIN. QNH PRESSURE IN HPA 1009.5 1010.3 1008.9 1004.2 997.5 994.8 990.8 993.4 995.0 1004.0 1009.3 1012.1 990.8 DAY-HOUR 17-12 27-12 13-12 13-15 28-15 6-15 11-15 11-15 1-12 1-12 1-12 9-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1014.8 1012.3 1007.1 1002.0 999.1 996.7 999.0 1004.0 1009.9 1014.7 1016.8 1007.7 MAX. QFE PRESSURE IN HPA 1020.1 1019.6 1015.7 1012.7 1006.9 1002.7 1000.7 1003.5 1008.7 1013.1 1019.7 1021.6 1021.6 DAY 30 11 4 1 4 17 26 14 23 30 30 17 MIN. QFE PRESSURE IN HPA 1012.2 1010.9 1009.5 1004.1 998.8 996.1 992.3 995.2 996.2 1004.8 1009.9 1012.2 992.3 DAY 10 27 14 28 28 6 11 11 2 1 2 11 MEAN QNH PRESSURE IN HPA 1015.6 1015.1 1012.6 1007.3 1002.2 999.3 996.9 999.2 1004.2 1010.2 1014.9 1017.1 1007.9 MAX. QNH PRESSURE IN HPA 1020.3 1019.8 1015.9 1012.9 1007.1 1002.9 1000.9 1003.7 1008.9 1013.3 1019.9 1021.8 1021.8 DAY 30 11 4 1 4 17 26 14 23 30 30 17 MIN. QNH PRESSURE IN HPA 1012.4 1011.1 1009.7 1004.3 999.0 996.3 992.5 995.4 996.4 1005.0 1010.1 1012.4 992.5 DAY 10 27 14 28 28 6 11 11 2 1 2 11 MEAN QFF PRESSURE IN HPA 1015.9 1015.3 1012.8 1007.6 1002.5 999.6 997.2 999.5 1004.4 1010.4 1015.2 1017.3 1008.2 MAX. QFF PRESSURE IN HPA 1020.6 1020.1 1016.2 1013.2 1007.4 1003.2 1001.2 1004.0 1009.2 1013.6 1020.2 1022.1 1022.1 DAY 31 11 4 1 4 17 26 14 23 30 30 17 MIN. QFF PRESSURE IN HPA 1012.7 1011.4 1010.0 1004.6 999.3 996.6 992.8 995.7 996.7 1005.3 1010.4 1012.7 992.8 DAY 10 27 14 28 28 6 11 11 2 1 2 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1016.6 1014.2 1008.7 1003.5 1000.3 997.8 1000.4 1005.4 1011.7 1016.3 1018.7 1009.3 MAX. QFE PRESSURE IN HPA 1021.7 1021.3 1017.8 1014.5 1008.6 1003.6 1001.8 1004.3 1010.2 1015.0 1021.7 1023.4 1023.4 DAY 30 11 4 1 6 17 26 14 23 30 30 17 MIN. QFE PRESSURE IN HPA 1013.8 1012.7 1011.5 1006.2 1000.3 996.7 993.4 997.1 997.5 1006.4 1010.6 1014.0 993.4 DAY 10 27 13 28 19 6 12 11 1 1 6 11 MEAN QNH PRESSURE IN HPA 1017.6 1016.9 1014.4 1009.0 1003.8 1000.5 998.1 1000.6 1005.6 1011.9 1016.5 1018.9 1009.5 MAX. QNH PRESSURE IN HPA 1021.9 1021.5 1018.0 1014.7 1008.8 1003.8 1002.0 1004.5 1010.4 1015.2 1021.9 1023.6 1023.6 DAY 30 11 4 1 6 17 26 14 23 30 30 17 MIN. QNH PRESSURE IN HPA 1014.0 1012.9 1011.7 1006.4 1000.5 996.9 993.6 997.3 997.7 1006.6 1010.8 1014.2 993.6 DAY 10 27 13 28 19 6 12 11 1 1 6 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1015.8 1015.5 1013.4 1008.0 1003.0 999.7 997.3 999.6 1004.3 1010.3 1014.9 1016.9 1008.2 MAX. QFE PRESSURE IN HPA 1020.7 1020.3 1016.8 1014.1 1008.2 1003.4 1000.9 1003.2 1008.9 1013.5 1020.0 1021.9 1021.9 DAY 30 11 4 1 6 16 25 14 22 26 30 17 MIN. QFE PRESSURE IN HPA 1012.1 1011.4 1010.6 1005.7 999.4 996.2 992.5 996.4 996.5 1005.5 1010.4 1013.0 992.5 DAY 10 27 13 28 19 6 12 11 2 1 1 11 MEAN QNH PRESSURE IN HPA 1016.0 1015.8 1013.6 1008.2 1003.2 999.9 997.5 999.8 1004.5 1010.5 1015.1 1017.2 1008.4 MAX. QNH PRESSURE IN HPA 1020.9 1020.5 1017.0 1014.3 1008.4 1003.6 1001.1 1003.4 1009.1 1013.7 1020.2 1022.1 1022.1 DAY 30 11 4 1 6 16 25 14 22 26 30 17 MIN. QNH PRESSURE IN HPA 1012.3 1011.6 1010.8 1005.9 999.6 996.4 992.7 996.6 996.7 1005.7 1010.6 1013.2 992.7 DAY 10 27 13 28 19 6 12 11 2 1 1 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.5 1013.9 1011.7 1006.5 1001.5 998.3 995.9 998.0 1002.8 1009.0 1013.6 1015.9 1006.8 MAX. QFE PRESSURE IN HPA 1019.3 1018.7 1014.9 1012.9 1006.9 1002.5 999.8 1001.9 1007.0 1012.2 1018.5 1020.6 1020.6 DAY 30 11 4 1 3 16 26 13 22 26 30 17 MIN. QFE PRESSURE IN HPA 1009.3 1010.1 1008.7 1004.1 997.7 994.8 991.5 994.2 994.8 1003.8 1009.1 1011.9 991.5 DAY 17 27 13 28 28 6 12 11 1 1 1 9 MEAN QNH PRESSURE IN HPA 1014.7 1014.1 1011.9 1006.7 1001.8 998.5 996.1 998.2 1003.0 1009.2 1013.9 1016.1 1007.0 MAX. QNH PRESSURE IN HPA 1019.5 1018.9 1015.1 1013.1 1007.1 1002.7 1000.0 1002.1 1007.2 1012.4 1018.7 1020.8 1020.8 DAY 30 11 4 1 3 16 26 13 22 26 30 17 MIN. QNH PRESSURE IN HPA 1009.5 1010.3 1008.9 1004.3 997.9 995.0 991.7 994.4 995.0 1004.0 1009.3 1012.1 991.7 DAY 17 27 13 28 28 6 12 11 1 1 1 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1015.2 1014.3 1011.7 1006.3 1001.0 997.7 995.3 997.4 1002.7 1009.3 1014.3 1016.6 1006.8 MAX. QFE PRESSURE IN HPA 1020.4 1019.1 1014.9 1012.2 1006.9 1001.8 999.3 1000.8 1007.0 1012.6 1018.9 1021.4 1021.4 DAY 30 11 4 1 3 16 25 13 22 26 30 17 MIN. QFE PRESSURE IN HPA 1010.1 1010.2 1008.9 1004.0 997.3 994.6 990.6 993.2 994.8 1004.5 1009.1 1012.3 990.6 DAY 17 7 13 13 28 6 11 11 1 1 1 9 MEAN QNH PRESSURE IN HPA 1015.4 1014.5 1012.0 1006.6 1001.2 997.9 995.5 997.6 1002.9 1009.5 1014.5 1016.8 1007.0 MAX. QNH PRESSURE IN HPA 1020.6 1019.3 1015.1 1012.4 1007.1 1002.0 999.5 1001.0 1007.2 1012.8 1019.1 1021.6 1021.6 DAY 30 11 4 1 3 16 25 13 22 26 30 17 MIN. QNH PRESSURE IN HPA 1010.3 1010.4 1009.1 1004.2 997.5 994.8 990.8 993.4 995.0 1004.7 1009.3 1012.5 990.8 DAY 17 7 13 13 28 6 11 11 1 1 1 9 MEAN QFF PRESSURE IN HPA 1015.7 1014.8 1012.2 1006.8 1001.5 998.2 995.8 997.9 1003.2 1009.8 1014.8 1017.1 1007.3 MAX. QFF PRESSURE IN HPA 1020.9 1019.6 1015.4 1012.7 1007.4 1002.3 999.8 1001.3 1007.5 1013.1 1019.4 1021.9 1021.9 DAY 30 11 4 1 3 16 25 13 22 26 30 17 MIN. QFF PRESSURE IN HPA 1010.6 1010.7 1009.4 1004.5 997.8 995.1 991.1 993.7 995.3 1005.0 1009.6 1012.8 991.1 DAY 17 7 19 25 28 6 11 11 1 1 1 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.7 21.3 23.6 27.0 31.3 31.6 33.6 34.3 33.5 31.5 27.7 25.7 28.5 MINIMUN AIR TEMPERATURE (C) 17.6 18.3 20.9 23.5 28.2 29.0 31.3 31.8 31.2 28.1 24.6 22.8 25.6 DAYS WITH MINIMUM TEMP. >=21 1 2 15 27 31 30 31 31 30 31 29 26 284 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 14.4 15.6 17.6 18.0 26.0 27.4 29.4 30.4 28.2 25.0 20.4 18.4 14.4 DAY 30 1 1 1 28 3 2 25 28 24 27 28 MAXIMUM AIR TEMPERATURE (C) 22.8 23.2 25.4 29.4 34.2 33.7 35.6 36.2 35.3 33.5 29.8 27.4 30.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 11 31 30 31 31 30 31 15 0 210 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.6 26.0 27.0 34.6 41.4 35.6 39.0 38.6 37.0 35.4 33.8 29.6 41.4 DAY 2 23 26 30 14 26 19 20 6 17 1 8 DIF. BETWEEN (MAX.-MIN.) (C) 5.2 4.9 4.5 5.9 6.0 4.7 4.3 4.4 4.1 5.4 5.2 4.6 4.9 MEAN DAILY TEMP. (MDT) (C) 20.2 20.8 23.2 26.4 31.2 31.3 33.4 34.0 33.2 30.8 27.2 25.1 28.1 COOLING DEG. DAYS(BASE 21 0C) 8.3 10.3 66.8 163.5 315.5 310.1 384.9 402.1 367.0 304.5 186.1 125.7 2644.8 HEATING DEG. DAYS(BASE 18 0C) 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 DEWPOINT (MEAN C) 12.4 14.3 18.4 20.7 23.9 26.4 28.4 28.1 27.8 24.4 17.8 19.2 21.8 MIXING RATIO (G/KG) 9.05 10.31 13.39 15.61 19.24 22.37 25.30 24.69 24.22 19.74 13.06 14.07 17.59 VAPOUR PRESSURE (HPA) 14.59 16.54 21.32 24.68 30.03 34.60 38.93 38.16 37.64 31.05 20.85 22.50 27.57 SATURATION DEF. (HPA) 10.03 8.90 7.91 11.11 15.91 12.10 13.36 16.04 14.17 15.30 16.63 10.66 12.68 RELATIVE HUMIDITY (MEAN %) 60 65 73 70 67 75 75 71 73 68 56 68 68 RELATIVE HUMIDITY (MAX. %) 68 74 84 83 80 87 85 82 83 80 67 77 79 RELATIVE HUMIDITY (MIN. %) 53 58 64 59 53 66 66 61 65 60 48 61 60 RELATIVE HUMIDITY (MEAN% 03UTC) 67 72 83 81 75 87 85 82 82 79 66 76 78 RELATIVE HUMIDITY (MEAN% 09UTC) 54 62 69 65 64 69 73 67 70 63 52 64 64 RELATIVE HUMIDITY (MEAN% 15UTC) 62 66 74 68 65 73 72 68 74 68 56 69 68 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 35.0 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 1 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION 2 1 1 0 0 0 0 0 0 0 0 0 4 GREATEST DAILY PRECIPITATION 30.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30.0 DAY 10 ** ** ** ** ** ** ** ** ** ** ** DAY WITH THUNDER STORM 2 0 1 0 0 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 1 5 5 7 1 5 8 2 4 1 0 40 WIND DIRECTION (PREVAILING) 315 270 270 270 270 225 90 90 90 270 270 90 270 PREVAILING WIND SPEED(KNOTS) 11.7 13.3 13.4 11.5 12.3 10.3 10.6 11.1 11.1 11.1 11.1 10.4 11.8 PREVAILING WIND PERCENT 18.7 32.1 30.3 35.3 32.9 40.0 23.9 29.7 21.3 23.2 26.0 24.5 23.3 CALMS PERCENT OF WIND 23.9 15.0 14.2 8.0 8.4 7.3 13.5 10.3 11.3 22.6 18.0 20.6 14.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 310 295 276 258 257 234 139 128 163 261 281 21 261 VECTOR WIND MAGNITUDE(KNOTS) 2.7 4.4 3.4 7.5 5.4 6.2 1.4 2.7 1.5 2.8 4.4 1.3 2.6 WIND STEADINESES (MEAN %) 31.8 41.9 33.0 75.0 55.7 66.0 16.3 29.3 17.2 37.3 48.9 14.8 28.3 WIND SPEED (MEAN KNOTS) 8.5 10.5 10.3 10.0 9.7 9.4 8.6 9.2 8.7 7.5 9.0 8.8 9.2 FASTEST WIND DIRECTION 360 300 290 300 270 270 300 300 80 80 300 70 300 FASTEST WIND SPEED (KNOTS) 25 27 23 23 19 17 17 23 16 17 17 17 27 DAY 9 12 27 18 7 11 8 31 2 11 1 18 DAYS WITH SKY CLEAR (0-2)/8 26 19 20 27 28 30 28 30 30 31 27 19 315 DAYS WITH P.CLOUDY (3-6)/8 4 8 10 3 1 0 2 1 0 0 3 9 41 DAYS WITH CLOUDY (7-8)/8 1 1 1 0 2 0 1 0 0 0 0 3 9 DAYS WITH VISIBILITY =< 2 KM 0 0 5 2 3 3 6 1 3 6 0 1 30 DURATION OF SUNSHINE HOURS 282.4 245.6 261.5 323.8 340.2 338.0 298.2 304.6 286.5 306.5 268.9 252.5 3508.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1017.3 1015.2 1012.2 1008.8 1002.1 997.4 996.2 1000.0 1004.7 1010.2 1015.0 1017.5 1008.0 MAX. QFE PRESSURE IN HPA 1024.8 1021.4 1021.0 1016.3 1007.9 1003.3 1000.6 1005.1 1010.9 1014.8 1020.8 1024.0 1024.8 DAY-HOUR 30- 6 1- 6 2- 6 1- 6 1- 6 3- 6 15- 6 5- 6 22- 6 23- 6 21- 6 28- 6 MIN. QFE PRESSURE IN HPA 1012.7 1007.9 1003.2 1002.4 996.9 994.6 991.5 995.4 996.0 1005.0 1009.4 1012.3 991.5 DAY-HOUR 8-12 21-12 25-15 29-15 25-15 7-15 8-15 3-15 1-15 1-12 11-12 5-12 MEAN QNH PRESSURE IN HPA 1017.5 1015.4 1012.4 1009.0 1002.3 997.6 996.4 1000.2 1004.9 1010.5 1015.2 1017.7 1008.3 MAX. QNH PRESSURE IN HPA 1025.0 1021.6 1021.2 1016.5 1008.1 1003.5 1000.8 1005.3 1011.1 1015.0 1021.0 1024.2 1025.0 DAY-HOUR 30- 6 1- 6 2- 6 1- 6 1- 6 3- 6 15- 6 5- 6 22- 6 23- 6 21- 6 28- 6 MIN. QNH PRESSURE IN HPA 1012.9 1008.1 1003.4 1002.6 997.1 994.8 991.7 995.6 996.2 1005.2 1009.6 1012.5 991.7 DAY-HOUR 8-12 21-12 25-15 29-15 25-15 7-15 8-15 3-15 1-15 1-12 11-12 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1015.1 1012.1 1008.6 1001.9 997.6 996.4 1000.2 1004.6 1010.2 1015.0 1017.4 1008.0 MAX. QFE PRESSURE IN HPA 1022.9 1020.1 1019.1 1014.2 1006.7 1002.0 1000.1 1003.8 1009.6 1012.9 1019.3 1022.4 1022.9 DAY 30 1 1 1 1 3 15 5 22 24 21 28 MIN. QFE PRESSURE IN HPA 1013.2 1009.4 1006.2 1003.6 997.5 995.7 992.5 996.9 996.4 1005.1 1010.1 1013.8 992.5 DAY 8 22 25 29 30 17 9 3 1 1 12 5 MEAN QNH PRESSURE IN HPA 1017.3 1015.3 1012.4 1008.8 1002.1 997.8 996.6 1000.4 1004.8 1010.5 1015.2 1017.6 1008.2 MAX. QNH PRESSURE IN HPA 1023.1 1020.3 1019.3 1014.4 1006.9 1002.2 1000.3 1004.0 1009.8 1013.1 1019.5 1022.6 1023.1 DAY 30 1 1 1 1 3 15 5 22 24 21 28 MIN. QNH PRESSURE IN HPA 1013.4 1009.6 1006.4 1003.8 997.7 995.9 992.7 997.1 996.6 1005.3 1010.3 1014.0 992.7 DAY 8 22 25 29 30 17 9 3 1 1 12 5 MEAN QFF PRESSURE IN HPA 1017.6 1015.6 1012.7 1009.1 1002.4 998.0 996.9 1000.7 1005.0 1010.7 1015.5 1017.9 1008.5 MAX. QFF PRESSURE IN HPA 1023.4 1020.6 1019.6 1014.7 1007.2 1002.5 1000.6 1004.3 1010.1 1013.4 1019.8 1022.9 1023.4 DAY 30 1 1 1 1 3 15 5 22 24 21 28 MIN. QFF PRESSURE IN HPA 1013.7 1009.9 1006.7 1004.1 998.0 996.2 993.0 997.4 996.9 1005.6 1010.6 1014.3 993.0 DAY 8 22 25 29 30 17 9 3 1 1 12 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1018.9 1016.8 1013.8 1010.2 1003.3 998.6 997.5 1001.5 1006.1 1011.9 1016.5 1019.1 1009.5 MAX. QFE PRESSURE IN HPA 1024.8 1021.4 1021.0 1016.3 1007.9 1003.3 1000.6 1005.1 1010.9 1014.8 1020.8 1024.0 1024.8 DAY 30 1 2 1 1 3 15 5 22 23 21 28 MIN. QFE PRESSURE IN HPA 1015.6 1011.9 1007.4 1005.2 998.1 996.8 992.9 997.9 997.5 1006.8 1012.2 1014.6 992.9 DAY 8 22 25 29 26 17 9 3 1 1 11 5 MEAN QNH PRESSURE IN HPA 1019.2 1017.0 1014.1 1010.4 1003.5 998.8 997.7 1001.7 1006.3 1012.1 1016.8 1019.3 1009.7 MAX. QNH PRESSURE IN HPA 1025.0 1021.6 1021.2 1016.5 1008.1 1003.5 1000.8 1005.3 1011.1 1015.0 1021.0 1024.2 1025.0 DAY 30 1 2 1 1 3 15 5 22 23 21 28 MIN. QNH PRESSURE IN HPA 1015.8 1012.1 1007.6 1005.4 998.3 997.0 993.1 998.1 997.7 1007.0 1012.4 1014.8 993.1 DAY 8 22 25 29 26 17 9 3 1 1 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1015.6 1012.9 1009.5 1002.8 998.1 996.9 1000.8 1005.3 1010.6 1015.1 1017.6 1008.6 MAX. QFE PRESSURE IN HPA 1022.8 1019.5 1019.4 1015.3 1007.2 1002.7 999.8 1004.3 1010.6 1013.6 1019.0 1022.3 1022.8 DAY 30 1 2 1 1 2 15 5 22 23 20 28 MIN. QFE PRESSURE IN HPA 1014.4 1009.7 1008.0 1004.3 997.8 996.4 992.5 997.3 997.7 1006.1 1010.6 1013.6 992.5 DAY 8 21 25 29 26 17 9 3 1 1 11 5 MEAN QNH PRESSURE IN HPA 1017.8 1015.8 1013.1 1009.7 1003.1 998.3 997.1 1001.0 1005.6 1010.8 1015.3 1017.8 1008.8 MAX. QNH PRESSURE IN HPA 1023.0 1019.7 1019.6 1015.5 1007.4 1002.9 1000.0 1004.5 1010.8 1013.8 1019.2 1022.5 1023.0 DAY 30 1 2 1 1 2 15 5 22 23 20 28 MIN. QNH PRESSURE IN HPA 1014.6 1009.9 1008.2 1004.5 998.0 996.6 992.7 997.5 997.9 1006.3 1010.8 1013.8 992.7 DAY 8 21 25 29 26 17 9 3 1 1 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.2 1014.0 1011.0 1008.0 1001.4 996.7 995.5 999.1 1003.8 1009.1 1013.8 1016.4 1007.1 MAX. QFE PRESSURE IN HPA 1021.3 1018.1 1017.8 1013.5 1005.5 1001.0 998.3 1002.5 1008.7 1012.3 1018.2 1020.6 1021.3 DAY 30 1 1 1 1 2 15 5 22 23 20 28 MIN. QFE PRESSURE IN HPA 1012.7 1007.9 1003.8 1003.1 997.2 994.8 991.8 995.6 996.6 1005.0 1009.4 1012.3 991.8 DAY 8 21 25 28 26 17 9 3 1 1 11 5 MEAN QNH PRESSURE IN HPA 1016.4 1014.3 1011.2 1008.2 1001.6 996.9 995.7 999.3 1004.1 1009.3 1014.1 1016.6 1007.3 MAX. QNH PRESSURE IN HPA 1021.5 1018.3 1018.0 1013.7 1005.7 1001.2 998.5 1002.7 1008.9 1012.5 1018.4 1020.8 1021.5 DAY 30 1 1 1 1 2 15 5 22 23 20 28 MIN. QNH PRESSURE IN HPA 1012.9 1008.1 1004.0 1003.3 997.4 995.0 992.0 995.8 996.8 1005.2 1009.6 1012.5 992.0 DAY 8 21 25 28 26 17 9 3 1 1 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1016.9 1014.6 1011.0 1007.8 1001.0 996.1 995.0 998.6 1003.7 1009.5 1014.5 1017.1 1007.1 MAX. QFE PRESSURE IN HPA 1022.4 1019.0 1017.8 1013.5 1005.0 1000.6 998.5 1002.3 1008.7 1012.5 1018.7 1021.6 1022.4 DAY 30 1 1 1 1 2 14 9 22 23 20 28 MIN. QFE PRESSURE IN HPA 1012.7 1008.2 1003.2 1002.4 996.9 994.6 991.5 995.4 996.0 1005.4 1009.7 1013.2 991.5 DAY 8 21 25 29 25 7 8 3 1 1 11 5 MEAN QNH PRESSURE IN HPA 1017.1 1014.8 1011.2 1008.0 1001.2 996.3 995.2 998.8 1003.9 1009.7 1014.7 1017.3 1007.4 MAX. QNH PRESSURE IN HPA 1022.6 1019.2 1018.0 1013.7 1005.2 1000.8 998.7 1002.5 1008.9 1012.7 1018.9 1021.8 1022.6 DAY 30 1 1 1 1 2 14 9 22 23 20 28 MIN. QNH PRESSURE IN HPA 1012.9 1008.4 1003.4 1002.6 997.1 994.8 991.7 995.6 996.2 1005.6 1009.9 1013.4 991.7 DAY 8 21 25 29 25 7 8 3 1 1 11 5 MEAN QFF PRESSURE IN HPA 1017.4 1015.1 1011.5 1008.3 1001.4 996.6 995.5 999.1 1004.2 1010.0 1015.0 1017.6 1007.6 MAX. QFF PRESSURE IN HPA 1022.9 1019.5 1018.3 1014.0 1005.5 1001.1 999.0 1002.8 1009.2 1013.0 1019.2 1022.1 1022.9 DAY 30 1 1 1 1 2 14 9 22 23 20 28 MIN. QFF PRESSURE IN HPA 1013.2 1008.7 1003.7 1002.9 997.4 995.1 992.0 995.9 996.5 1005.9 1010.2 1013.7 992.0 DAY 8 21 25 29 25 7 8 3 1 1 11 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 22.0 22.0 24.2 26.7 31.3 32.9 33.9 34.4 33.1 31.6 27.3 23.6 28.6 MINIMUN AIR TEMPERATURE (C) 18.9 19.3 21.7 24.1 28.0 29.8 31.3 32.0 30.3 28.2 24.4 21.3 25.8 DAYS WITH MINIMUM TEMP. >=21 8 5 18 30 31 30 31 31 30 31 28 20 293 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 15.0 16.2 18.8 21.2 25.4 25.6 29.6 30.6 28.4 25.0 19.6 15.8 15.0 DAY 28 3 11 9 19 3 3 8 21 27 29 24 MAXIMUM AIR TEMPERATURE (C) 23.7 23.8 26.1 29.1 34.4 35.5 35.9 36.1 34.9 33.5 29.0 25.0 30.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 10 31 30 31 31 30 31 9 0 204 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.4 26.6 30.2 37.0 38.0 40.0 38.8 40.4 37.0 35.4 32.6 28.4 40.4 DAY 2 27 30 28 8 28 15 2 4 2 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 4.8 4.5 4.4 5.0 6.4 5.7 4.6 4.1 4.6 5.3 4.6 3.7 4.8 MEAN DAILY TEMP. (MDT) (C) 21.3 21.5 23.9 26.6 31.2 32.6 33.6 34.0 32.6 30.9 26.7 23.2 28.2 COOLING DEG. DAYS(BASE 21 0C) 28.2 23.8 89.8 169.3 317.0 348.9 389.8 404.0 348.1 305.7 171.0 70.7 2666.3 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DEWPOINT (MEAN C) 13.3 14.6 18.5 20.1 24.5 26.9 29.3 29.8 28.7 24.8 17.8 16.7 22.1 MIXING RATIO (G/KG) 9.83 10.54 13.52 15.17 20.03 23.08 26.52 27.35 25.42 20.17 13.01 12.10 18.06 VAPOUR PRESSURE (HPA) 15.82 16.93 21.54 23.99 31.27 35.73 40.82 42.04 39.47 31.70 20.77 19.39 28.29 SATURATION DEF. (HPA) 10.73 9.54 8.81 11.36 14.74 14.58 12.24 12.35 11.18 14.95 15.78 9.92 12.18 RELATIVE HUMIDITY (MEAN %) 59 64 72 69 69 72 78 78 78 68 57 66 69 RELATIVE HUMIDITY (MAX. %) 68 74 83 80 84 84 89 88 88 79 66 73 80 RELATIVE HUMIDITY (MIN. %) 52 56 61 56 54 60 69 69 71 61 51 59 60 RELATIVE HUMIDITY (MEAN% 03UTC) 65 71 79 78 81 83 88 88 88 79 64 70 78 RELATIVE HUMIDITY (MEAN% 09UTC) 57 60 67 64 68 70 75 75 74 63 55 63 66 RELATIVE HUMIDITY (MEAN% 15UTC) 60 66 73 71 67 69 74 77 78 70 57 67 69 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 17.8 0.0 28.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 2.6 3.2 51.7 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 0 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 1 4 0 2 0 0 0 0 0 0 0 1 1 8 DAYS WITH PRECIPITATION 8 0 5 2 0 0 0 0 0 0 3 2 20 GREATEST DAILY PRECIPITATION 9.0 0.0 27.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 2.0 3.0 27.0 DAY 12 ** 19 1 ** ** ** ** ** ** 7 18 DAY WITH THUNDER STORM 2 0 1 0 0 0 0 0 0 0 1 0 4 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 3 5 7 4 6 3 2 2 2 0 1 37 WIND DIRECTION (PREVAILING) 315 270 270 270 270 270 225 225 90 270 315 315 270 PREVAILING WIND SPEED(KNOTS) 13.8 13.0 11.3 14.4 12.1 11.3 11.5 9.6 10.9 9.7 11.0 12.9 12.0 PREVAILING WIND PERCENT 23.2 24.3 24.5 37.3 26.5 27.3 20.6 21.3 21.3 29.7 21.3 26.5 22.8 CALMS PERCENT OF WIND 13.5 12.9 11.6 6.0 5.8 12.0 9.0 14.2 21.3 26.5 14.0 13.5 13.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 327 250 302 267 262 265 201 199 166 240 354 327 271 VECTOR WIND MAGNITUDE(KNOTS) 3.1 2.0 2.2 6.7 5.7 4.8 2.7 1.6 0.5 3.6 3.0 3.1 2.4 WIND STEADINESES (MEAN %) 27.2 18.5 21.2 58.3 54.3 55.8 28.4 18.4 6.4 51.4 31.6 29.5 24.7 WIND SPEED (MEAN KNOTS) 11.4 10.8 10.4 11.5 10.5 8.6 9.5 8.7 7.8 7.0 9.5 10.5 9.7 FASTEST WIND DIRECTION 290 50 300 290 300 300 240 280 300 240 90 300 290 FASTEST WIND SPEED (KNOTS) 25 23 19 25 19 19 17 16 19 16 23 21 25 DAY 31 5 24 4 14 7 1 20 22 2 8 29 DAYS WITH SKY CLEAR (0-2)/8 17 19 17 23 30 29 30 31 30 31 26 24 307 DAYS WITH P.CLOUDY (3-6)/8 10 9 11 6 0 1 1 0 0 0 3 5 46 DAYS WITH CLOUDY (7-8)/8 4 0 3 1 1 0 0 0 0 0 1 2 12 DAYS WITH VISIBILITY =< 2 KM 1 0 4 3 6 8 8 3 3 3 0 0 39 DURATION OF SUNSHINE HOURS 222.0 244.5 235.5 292.5 348.4 340.0 340.0 317.8 287.4 304.6 266.6 230.9 3430.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1017.7 1017.4 1013.0 1009.0 1003.5 999.0 998.4 998.5 1005.6 1010.3 1014.9 1016.7 1008.7 MAX. QFE PRESSURE IN HPA 1023.4 1024.3 1021.1 1015.6 1009.1 1005.0 1001.8 1006.1 1011.6 1016.1 1020.9 1022.7 1024.3 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 10- 6 3- 6 3- 6 30- 6 21- 6 26- 6 29- 6 30- 6 MIN. QFE PRESSURE IN HPA 1012.8 1011.1 1005.5 1002.5 997.4 994.4 993.8 993.6 1001.1 1005.0 1009.2 1009.2 993.6 DAY-HOUR 11-12 25-12 28-15 30-15 28- 3 20-12 22-15 6-15 10-12 12-12 7-12 22-12 MEAN QNH PRESSURE IN HPA 1017.9 1017.6 1013.2 1009.2 1003.7 999.2 998.7 998.7 1005.8 1010.5 1015.1 1016.9 1008.9 MAX. QNH PRESSURE IN HPA 1023.6 1024.5 1021.3 1015.8 1009.3 1005.2 1002.0 1006.3 1011.8 1016.3 1021.1 1022.9 1024.5 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 10- 6 3- 6 3- 6 30- 6 21- 6 26- 6 29- 6 30- 6 MIN. QNH PRESSURE IN HPA 1013.0 1011.3 1005.7 1002.7 997.6 994.6 994.0 993.8 1001.3 1005.2 1009.4 1009.4 993.8 DAY-HOUR 11-12 25-12 28-15 30-15 28- 3 20-12 22-15 6-15 10-12 12-12 7-12 22-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1017.1 1012.8 1008.7 1003.1 998.9 998.5 998.8 1005.5 1010.3 1015.0 1016.6 1008.5 MAX. QFE PRESSURE IN HPA 1021.6 1022.5 1019.5 1014.1 1007.1 1003.3 1001.6 1005.1 1009.9 1014.0 1019.2 1020.6 1022.5 DAY 26 2 12 1 11 3 3 30 21 26 29 14 MIN. QFE PRESSURE IN HPA 1013.7 1011.7 1007.3 1004.0 997.4 994.9 995.6 995.3 1001.5 1006.4 1012.4 1010.0 994.9 DAY 12 26 29 30 28 22 27 6 6 13 13 22 MEAN QNH PRESSURE IN HPA 1017.7 1017.3 1013.0 1008.9 1003.3 999.1 998.7 999.0 1005.8 1010.5 1015.2 1016.8 1008.8 MAX. QNH PRESSURE IN HPA 1021.8 1022.7 1019.7 1014.3 1007.3 1003.5 1001.8 1005.3 1010.1 1014.2 1019.4 1020.8 1022.7 DAY 26 2 12 1 11 3 3 30 21 26 29 14 MIN. QNH PRESSURE IN HPA 1013.9 1011.9 1007.5 1004.2 997.6 995.1 995.8 995.5 1001.7 1006.6 1012.6 1010.2 995.1 DAY 12 26 29 30 28 22 27 6 6 13 13 22 MEAN QFF PRESSURE IN HPA 1018.0 1017.6 1013.3 1009.2 1003.6 999.4 998.9 999.3 1006.0 1010.8 1015.5 1017.1 1009.0 MAX. QFF PRESSURE IN HPA 1022.1 1023.0 1020.0 1014.6 1007.6 1003.8 1002.1 1005.6 1010.4 1014.5 1019.7 1021.1 1023.0 DAY 26 2 12 1 11 3 3 30 21 26 29 14 MIN. QFF PRESSURE IN HPA 1014.2 1012.2 1007.8 1004.5 997.9 995.4 996.1 995.8 1002.0 1006.9 1012.9 1010.5 995.4 DAY 12 26 29 30 28 22 27 6 6 13 13 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.2 1019.1 1014.5 1010.4 1004.7 1000.2 999.6 999.8 1007.1 1011.9 1016.5 1018.5 1010.1 MAX. QFE PRESSURE IN HPA 1023.4 1024.3 1021.1 1015.6 1009.1 1005.0 1001.8 1006.1 1011.6 1016.1 1020.9 1022.7 1024.3 DAY 26 6 11 1 10 3 3 30 21 26 29 30 MIN. QFE PRESSURE IN HPA 1015.2 1013.8 1009.6 1005.6 998.8 995.8 996.8 996.1 1003.6 1007.9 1013.2 1011.9 995.8 DAY 22 25 28 30 28 22 27 6 10 12 7 22 MEAN QNH PRESSURE IN HPA 1019.5 1019.3 1014.7 1010.6 1005.0 1000.4 999.9 1000.0 1007.3 1012.1 1016.7 1018.7 1010.4 MAX. QNH PRESSURE IN HPA 1023.6 1024.5 1021.3 1015.8 1009.3 1005.2 1002.0 1006.3 1011.8 1016.3 1021.1 1022.9 1024.5 DAY 26 6 11 1 10 3 3 30 21 26 29 30 MIN. QNH PRESSURE IN HPA 1015.4 1014.0 1009.8 1005.8 999.0 996.0 997.0 996.3 1003.8 1008.1 1013.4 1012.1 996.0 DAY 22 25 28 30 28 22 27 6 10 12 7 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.8 1018.0 1013.6 1009.7 1004.3 999.8 999.1 999.2 1006.2 1010.6 1014.9 1016.8 1009.2 MAX. QFE PRESSURE IN HPA 1022.4 1023.1 1020.0 1014.1 1008.7 1004.4 1001.1 1005.5 1010.5 1014.7 1018.8 1020.8 1023.1 DAY 26 6 11 1 10 3 3 29 20 26 29 30 MIN. QFE PRESSURE IN HPA 1014.3 1013.0 1008.5 1005.2 999.4 995.4 996.6 995.4 1003.0 1006.2 1010.7 1009.5 995.4 DAY 11 25 28 30 28 22 22 6 5 12 7 22 MEAN QNH PRESSURE IN HPA 1018.0 1018.2 1013.9 1009.9 1004.5 1000.0 999.4 999.4 1006.4 1010.8 1015.2 1017.0 1009.4 MAX. QNH PRESSURE IN HPA 1022.6 1023.3 1020.2 1014.3 1008.9 1004.6 1001.3 1005.7 1010.7 1014.9 1019.0 1021.0 1023.3 DAY 26 6 11 1 10 3 3 29 20 26 29 30 MIN. QNH PRESSURE IN HPA 1014.5 1013.2 1008.7 1005.4 999.6 995.6 996.8 995.6 1003.2 1006.4 1010.9 1009.7 995.6 DAY 11 25 28 30 28 22 22 6 5 12 7 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.6 1016.2 1012.0 1008.2 1002.8 998.4 997.8 997.6 1004.7 1009.2 1013.7 1015.5 1007.7 MAX. QFE PRESSURE IN HPA 1021.2 1021.1 1018.1 1013.2 1006.6 1002.6 1000.0 1003.4 1008.9 1013.5 1017.4 1021.1 1021.2 DAY 26 2 11 1 10 3 13 29 21 26 29 30 MIN. QFE PRESSURE IN HPA 1012.8 1011.1 1007.6 1002.6 998.3 994.4 994.8 993.8 1001.1 1005.0 1009.2 1009.2 993.8 DAY 11 25 21 3 28 20 22 6 10 12 7 22 MEAN QNH PRESSURE IN HPA 1016.8 1016.4 1012.2 1008.4 1003.1 998.6 998.0 997.8 1004.9 1009.4 1013.9 1015.8 1007.9 MAX. QNH PRESSURE IN HPA 1021.4 1021.3 1018.3 1013.4 1006.8 1002.8 1000.2 1003.6 1009.1 1013.7 1017.6 1021.3 1021.4 DAY 26 2 11 1 10 3 13 29 21 26 29 30 MIN. QNH PRESSURE IN HPA 1013.0 1011.3 1007.8 1002.8 998.5 994.6 995.0 994.0 1001.3 1005.2 1009.4 1009.4 994.0 DAY 11 25 21 3 28 20 22 6 10 12 7 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1016.7 1012.1 1008.1 1002.4 997.9 997.2 997.4 1004.7 1009.7 1014.3 1016.2 1007.8 MAX. QFE PRESSURE IN HPA 1022.2 1022.0 1018.2 1014.2 1006.7 1002.3 999.5 1003.8 1008.9 1014.0 1018.4 1020.4 1022.2 DAY 26 1 12 1 10 3 3 29 29 26 29 30 MIN. QFE PRESSURE IN HPA 1012.8 1011.2 1005.5 1002.5 998.1 994.4 993.8 993.6 1001.3 1005.3 1010.5 1010.8 993.6 DAY 11 25 28 30 28 20 22 6 5 12 7 22 MEAN QNH PRESSURE IN HPA 1017.6 1016.9 1012.3 1008.3 1002.7 998.1 997.4 997.6 1004.9 1009.9 1014.5 1016.4 1008.1 MAX. QNH PRESSURE IN HPA 1022.4 1022.2 1018.4 1014.4 1006.9 1002.5 999.7 1004.0 1009.1 1014.2 1018.6 1020.6 1022.4 DAY 26 1 12 1 10 3 3 29 29 26 29 30 MIN. QNH PRESSURE IN HPA 1013.0 1011.4 1005.7 1002.7 998.3 994.6 994.0 993.8 1001.5 1005.5 1010.7 1011.0 993.8 DAY 11 25 28 30 28 20 22 6 5 12 7 22 MEAN QFF PRESSURE IN HPA 1017.9 1017.2 1012.6 1008.6 1002.9 998.4 997.7 997.9 1005.2 1010.2 1014.8 1016.7 1008.3 MAX. QFF PRESSURE IN HPA 1022.7 1022.5 1018.7 1014.7 1007.2 1002.8 1000.0 1004.3 1009.4 1014.5 1018.9 1020.9 1022.7 DAY 26 1 12 1 10 3 3 29 29 26 29 30 MIN. QFF PRESSURE IN HPA 1013.3 1011.7 1006.0 1003.0 998.6 994.9 994.3 994.1 1001.8 1005.8 1011.0 1011.3 994.1 DAY 11 25 28 30 28 20 22 6 5 12 7 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 21.2 22.3 23.4 27.1 30.7 32.7 34.0 34.2 33.3 31.7 27.4 23.2 28.4 MINIMUN AIR TEMPERATURE (C) 18.0 20.0 20.9 24.3 27.8 29.7 32.1 32.0 30.2 28.7 25.0 21.1 25.8 DAYS WITH MINIMUM TEMP. >=21 2 11 15 30 31 30 31 31 30 31 28 18 288 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 15.4 16.6 16.6 21.4 23.4 27.4 29.2 30.4 28.6 25.4 20.0 18.0 15.4 DAY 20 1 17 5 2 1 2 19 6 24 27 19 MAXIMUM AIR TEMPERATURE (C) 23.0 23.8 25.1 29.4 33.5 35.1 35.6 36.0 35.3 33.6 28.8 24.5 30.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 13 28 30 31 31 30 31 11 0 206 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.6 26.6 30.6 31.8 37.4 38.0 37.4 38.2 38.0 36.0 33.0 26.6 38.2 DAY 7 14 24 27 24 16 9 21 12 4 1 6 DIF. BETWEEN (MAX.-MIN.) (C) 5.0 3.8 4.2 5.1 5.7 5.4 3.5 4.0 5.1 4.9 3.8 3.4 4.5 MEAN DAILY TEMP. (MDT) (C) 20.5 21.9 23.0 26.8 30.6 32.4 33.9 34.0 32.8 31.2 26.9 22.8 28.1 COOLING DEG. DAYS(BASE 21 0C) 6.7 31.3 66.7 175.3 297.7 341.5 399.4 402.6 352.7 315.2 177.6 55.8 2622.5 HEATING DEG. DAYS(BASE 18 0C) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 DEWPOINT (MEAN C) 14.2 16.2 17.5 22.2 23.7 27.5 28.6 29.7 28.1 23.4 16.9 15.3 21.9 MIXING RATIO (G/KG) 10.31 11.85 13.02 17.03 18.94 23.96 25.50 27.16 24.64 18.47 12.27 11.06 17.85 VAPOUR PRESSURE (HPA) 16.58 18.95 20.73 26.89 29.68 37.00 39.22 41.80 38.24 29.13 19.62 17.77 27.97 SATURATION DEF. (HPA) 8.67 8.06 8.16 9.05 14.79 12.71 14.02 12.16 13.09 17.69 17.02 10.72 12.18 RELATIVE HUMIDITY (MEAN %) 66 70 72 76 68 75 74 78 75 63 54 62 69 RELATIVE HUMIDITY (MAX. %) 76 80 82 89 81 88 84 87 85 73 61 70 80 RELATIVE HUMIDITY (MIN. %) 58 62 64 64 54 63 66 69 66 54 47 55 60 RELATIVE HUMIDITY (MEAN% 03UTC) 73 77 78 87 79 87 84 86 84 72 60 67 78 RELATIVE HUMIDITY (MEAN% 09UTC) 62 66 69 71 66 74 71 76 71 58 50 59 66 RELATIVE HUMIDITY (MEAN% 15UTC) 65 71 72 74 65 70 72 75 76 65 56 64 69 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.9 19.4 8.7 19.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7.6 57.8 DAYS WITH PRECIPITATION >=10 0 1 0 1 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 0 2 1 1 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 1 1 4 2 1 0 0 0 0 0 0 0 1 9 DAYS WITH PRECIPITATION 3 6 3 2 0 0 0 0 0 0 0 2 16 GREATEST DAILY PRECIPITATION 2.6 10.0 7.0 19.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7.0 19.0 DAY 1 24 21 17 ** ** ** ** ** ** ** 2 DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 0 0 0 1 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 4 7 6 7 5 6 0 2 2 5 1 47 WIND DIRECTION (PREVAILING) 270 315 90 270 270 270 90 90 90 270 315 315 90 PREVAILING WIND SPEED(KNOTS) 10.1 15.2 13.0 11.9 11.9 9.6 8.2 8.5 8.1 8.8 12.1 10.0 9.9 PREVAILING WIND PERCENT 24.5 22.9 23.9 19.3 31.0 26.7 29.0 45.2 22.7 27.1 25.2 30.3 20.1 CALMS PERCENT OF WIND 20.6 9.3 14.8 10.0 9.0 10.7 2.6 1.3 11.3 9.0 5.4 7.7 9.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 147 155 1822 VECTOR WIND DIRECTION (MEAN) 278 317 29 274 274 244 122 88 270 250 354 33 305 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.3 1.7 3.2 6.2 3.6 2.4 3.8 0.4 2.3 3.3 4.1 1.0 WIND STEADINESES (MEAN %) 21.3 20.2 16.7 31.7 62.6 46.2 30.8 52.1 6.0 30.7 32.0 40.2 11.1 WIND SPEED (MEAN KNOTS) 8.9 11.4 10.2 10.1 9.9 7.8 7.8 7.3 6.7 7.5 10.3 10.2 9.0 FASTEST WIND DIRECTION 190 300 290 300 310 300 110 110 70 300 290 60 60 FASTEST WIND SPEED (KNOTS) 19 29 27 19 19 17 16 19 17 17 27 31 31 DAY 17 18 1 18 1 16 7 17 1 4 14 12 DAYS WITH SKY CLEAR (0-2)/8 22 14 21 20 31 30 26 30 29 29 25 22 299 DAYS WITH P.CLOUDY (3-6)/8 7 11 8 7 0 0 4 1 1 2 5 5 51 DAYS WITH CLOUDY (7-8)/8 2 3 2 3 0 0 1 0 0 0 0 4 15 DAYS WITH VISIBILITY =< 2 KM 1 3 5 3 6 7 8 6 2 1 1 1 44 DURATION OF SUNSHINE HOURS 232.4 204.3 242.5 270.3 333.6 333.6 244.0 288.1 287.5 300.9 269.6 192.0 3198.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1017.9 1014.0 1012.5 1009.5 1005.5 998.0 996.3 999.5 1004.2 1011.0 1015.1 1018.3 1008.5 MAX. QFE PRESSURE IN HPA 1023.8 1020.3 1023.1 1015.5 1010.9 1007.6 1001.3 1002.8 1010.4 1018.3 1023.9 1024.4 1024.4 DAY-HOUR 12- 6 3- 6 3- 6 7- 6 3- 6 1- 6 3- 6 5- 6 27- 6 29- 6 25- 6 14- 6 MIN. QFE PRESSURE IN HPA 1010.9 1008.1 1004.4 1003.7 1001.5 993.0 991.6 995.5 998.9 1004.7 1009.4 1012.1 991.6 DAY-HOUR 29- 3 15-12 13-12 13-15 28-15 20-15 25-15 9-15 3-12 6-12 1-12 6-12 MEAN QNH PRESSURE IN HPA 1018.1 1014.3 1012.8 1009.7 1005.7 998.3 996.5 999.7 1004.4 1011.2 1015.3 1018.5 1008.7 MAX. QNH PRESSURE IN HPA 1024.0 1020.5 1023.3 1015.7 1011.1 1007.8 1001.5 1003.0 1010.6 1018.5 1024.1 1024.6 1024.6 DAY-HOUR 12- 6 3- 6 3- 6 7- 6 3- 6 1- 6 3- 6 5- 6 27- 6 29- 6 25- 6 14- 6 MIN. QNH PRESSURE IN HPA 1011.1 1008.3 1004.6 1003.9 1001.7 993.2 991.8 995.7 999.1 1004.9 1009.6 1012.3 991.8 DAY-HOUR 29- 3 15-12 13-12 13-15 28-15 20-15 25-15 9-15 3-12 6-12 1-12 6-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1013.9 1012.2 1009.2 1005.2 998.0 996.5 999.5 1004.2 1010.9 1015.1 1018.1 1008.4 MAX. QFE PRESSURE IN HPA 1021.5 1018.3 1021.3 1014.4 1009.3 1006.9 1000.6 1001.7 1009.1 1016.0 1021.8 1022.2 1022.2 DAY 7 3 3 8 3 1 3 29 27 30 25 15 MIN. QFE PRESSURE IN HPA 1010.9 1008.9 1005.2 1004.8 1002.0 993.4 993.7 996.7 1000.4 1005.3 1011.0 1013.5 993.4 DAY 29 15 13 14 29 21 25 21 4 6 2 6 MEAN QNH PRESSURE IN HPA 1017.7 1014.2 1012.4 1009.4 1005.5 998.2 996.7 999.7 1004.5 1011.2 1015.3 1018.4 1008.6 MAX. QNH PRESSURE IN HPA 1021.7 1018.5 1021.5 1014.6 1009.5 1007.1 1000.8 1001.9 1009.3 1016.2 1022.0 1022.4 1022.4 DAY 7 3 3 8 3 1 3 29 27 30 25 15 MIN. QNH PRESSURE IN HPA 1011.1 1009.1 1005.4 1005.0 1002.2 993.6 993.9 996.9 1000.6 1005.5 1011.2 1013.7 993.6 DAY 29 15 13 14 29 21 25 21 4 6 2 6 MEAN QFF PRESSURE IN HPA 1018.0 1014.5 1012.7 1009.7 1005.7 998.5 997.0 1000.0 1004.7 1011.4 1015.6 1018.6 1008.9 MAX. QFF PRESSURE IN HPA 1022.0 1018.8 1021.8 1014.9 1009.8 1007.4 1001.1 1002.2 1009.6 1016.5 1022.3 1022.7 1022.7 DAY 7 3 3 8 3 1 3 29 27 30 25 15 MIN. QFF PRESSURE IN HPA 1011.4 1009.4 1005.7 1005.3 1002.5 993.9 994.2 997.2 1000.9 1005.8 1011.5 1014.0 993.9 DAY 29 15 13 14 29 21 25 21 5 6 2 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION JAZIREH SIRI (40889) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 53 N LONGITUDE 54 29 E DATA PROCESSING CENTER ELEVATION 4.4 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.4 1015.7 1014.2 1010.8 1006.7 999.2 997.5 1000.9 1005.6 1012.6 1016.8 1020.1 1010.0 MAX. QFE PRESSURE IN HPA 1023.8 1020.3 1023.1 1015.5 1010.9 1007.6 1001.3 1002.8 1010.4 1018.3 1023.9 1024.4 1024.4 DAY 12 3 3 7 3 1 3 5 27 29 25 14 MIN. QFE PRESSURE IN HPA 1015.1 1010.9 1007.6 1005.8 1003.8 994.6 994.4 998.0 1001.5 1006.7 1012.5 1015.4 994.4 DAY 17 15 13 14 23 21 25 20 4 6 2 5 MEAN QNH PRESSURE IN HPA 1019.7 1015.9 1014.5 1011.1 1007.0 999.4 997.7 1001.1 1005.8 1012.8 1017.0 1020.3 1010.2 MAX. QNH PRESSURE IN HPA 1024.0 1020.5 1023.3 1015.7 1011.1 1007.8 1001.5 1003.0 1010.6 1018.5 1024.1 1024.6 1024.6 DAY 12 3 3 7 3 1 3 5 27 29 25 14 MIN. QNH PRESSURE IN HPA 1015.3 1011.1 1007.8 1006.0 1004.0 994.8 994.6 998.2 1001.7 1006.9 1012.7 1015.6 994.6 DAY 17 15 13 14 23 21 25 20 4 6 2 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.1 1014.5 1013.4 1010.4 1006.3 998.8 997.0 1000.2 1004.8 1011.4 1015.3 1018.3 1009.0 MAX. QFE PRESSURE IN HPA 1022.3 1019.4 1022.1 1015.5 1010.5 1007.2 1000.8 1002.4 1009.7 1016.6 1022.1 1022.7 1022.7 DAY 6 3 3 7 3 1 3 5 27 29 25 14 MIN. QFE PRESSURE IN HPA 1013.1 1010.1 1006.9 1005.8 1003.4 994.5 994.1 997.7 1000.8 1005.8 1011.0 1013.5 994.1 DAY 29 15 13 14 18 30 25 21 4 6 1 5 MEAN QNH PRESSURE IN HPA 1018.4 1014.7 1013.6 1010.6 1006.6 999.0 997.2 1000.4 1005.0 1011.6 1015.5 1018.5 1009.3 MAX. QNH PRESSURE IN HPA 1022.5 1019.6 1022.3 1015.7 1010.7 1007.4 1001.0 1002.6 1009.9 1016.8 1022.3 1022.9 1022.9 DAY 6 3 3 7 3 1 3 5 27 29 25 14 MIN. QNH PRESSURE IN HPA 1013.3 1010.3 1007.1 1006.0 1003.6 994.7 994.3 997.9 1001.0 1006.0 1011.2 1013.7 994.3 DAY 29 15 13 14 18 30 25 21 4 6 1 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1012.8 1011.5 1008.7 1004.8 997.4 995.5 998.5 1003.2 1010.0 1013.9 1017.1 1007.5 MAX. QFE PRESSURE IN HPA 1021.2 1017.6 1020.3 1013.9 1008.7 1005.5 999.2 1000.3 1007.9 1015.0 1020.7 1021.3 1021.3 DAY 6 3 3 7 3 1 3 4 27 29 25 14 MIN. QFE PRESSURE IN HPA 1011.6 1008.1 1004.4 1004.4 1001.9 993.3 992.5 996.1 998.9 1004.7 1009.4 1012.1 992.5 DAY 28 15 13 13 23 20 25 20 3 6 1 6 MEAN QNH PRESSURE IN HPA 1017.0 1013.1 1011.7 1008.9 1005.1 997.6 995.7 998.8 1003.4 1010.2 1014.2 1017.3 1007.7 MAX. QNH PRESSURE IN HPA 1021.4 1017.8 1020.5 1014.1 1008.9 1005.7 999.4 1000.5 1008.1 1015.2 1020.9 1021.5 1021.5 DAY 6 3 3 7 3 1 3 4 27 29 25 14 MIN. QNH PRESSURE IN HPA 1011.8 1008.3 1004.6 1004.6 1002.1 993.5 992.7 996.3 999.1 1004.9 1009.6 1012.3 992.7 DAY 28 15 13 13 23 20 25 20 3 6 1 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****