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 ** ** ** ** **