STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.8 14.3 17.7 25.3 34.5 38.3 40.4 38.1 34.1 27.3 21.9 13.9 26.4 MINIMUN AIR TEMPERATURE (C) 4.4 5.6 8.5 15.2 22.5 24.5 26.6 26.2 20.8 14.7 12.5 7.6 15.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 22 30 31 31 16 0 0 0 130 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 2 1 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS LOWEST(C) -0.8 0.0 2.0 11.0 17.4 21.6 23.2 21.0 16.2 12.0 9.4 1.4 -0.8 DAY 29 24 10 2 1 9 1 27 29 20 3 23 MAXIMUM AIR TEMPERATURE (C) 15.0 19.6 23.0 30.6 40.0 45.2 47.5 44.9 41.6 34.7 29.2 20.9 32.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 20 31 30 31 31 29 31 10 0 213 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.2 24.6 28.4 36.2 43.6 48.0 51.0 49.0 45.0 40.6 33.8 28.6 51.0 DAY 1 26 27 30 24 18 12 17 8 1 1 10 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 14.0 14.5 15.4 17.5 20.7 20.9 18.7 20.8 20.0 16.7 13.3 16.9 MEAN DAILY TEMP. (MDT) (C) 9.7 12.6 15.8 22.9 31.2 34.8 37.0 35.5 31.2 24.7 20.8 14.3 24.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.3 68.9 317.7 415.2 496.6 450.4 296.1 114.4 18.0 0.7 2178.3 HEATING DEG. DAYS(BASE 18 0C) 257.9 151.8 82.8 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 132.7 625.2 DEWPOINT (MEAN C) 6.6 8.3 7.3 15.3 14.4 13.1 14.6 17.4 14.7 5.9 9.8 7.6 11.2 MIXING RATIO (G/KG) 6.21 6.93 6.73 11.36 10.77 9.87 11.31 13.57 11.30 6.17 7.76 6.76 9.06 VAPOUR PRESSURE (HPA) 10.06 11.17 10.83 18.07 17.07 15.60 17.70 21.19 17.81 9.90 12.50 10.92 14.40 SATURATION DEF. (HPA) 3.36 5.91 10.55 15.84 40.33 55.97 62.53 49.42 39.37 29.15 15.32 6.08 27.82 RELATIVE HUMIDITY (MEAN %) 77 69 55 58 33 25 26 33 34 29 50 68 46 RELATIVE HUMIDITY (MAX. %) 92 87 78 79 54 41 43 51 50 46 67 85 64 RELATIVE HUMIDITY (MIN. %) 63 54 39 44 23 16 16 22 25 18 33 47 33 RELATIVE HUMIDITY (MEAN% 03UTC) 90 86 77 79 53 41 43 51 49 45 65 81 63 RELATIVE HUMIDITY (MEAN% 09UTC) 70 63 46 49 26 19 20 27 27 22 37 57 39 RELATIVE HUMIDITY (MEAN% 15UTC) 74 62 45 53 29 19 19 27 32 24 44 61 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 73.3 16.0 46.3 18.0 1.3 0.0 0.0 0.0 0.0 0.0 3.2 26.5 184.6 DAYS WITH PRECIPITATION >=10 4 0 2 0 0 0 0 0 0 0 0 2 8 DAYS WITH PRECIPITATION >= 5 6 3 2 1 0 0 0 0 0 0 0 2 14 DAYS WITH PRECIPITATION >= 1 6 3 7 4 0 0 0 0 0 0 2 3 25 DAYS WITH PRECIPITATION 6 3 8 6 2 0 0 0 0 0 3 6 34 GREATEST DAILY PRECIPITATION 25.0 6.0 18.0 8.0 0.8 0.0 0.0 0.0 0.0 0.0 2.0 12.0 25.0 DAY 9 5 16 6 24 ** ** ** ** ** 29 27 DAY WITH THUNDER STORM 1 0 0 2 0 0 0 0 0 0 1 3 7 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 6 2 2 15 21 16 22 12 4 8 0 110 WIND DIRECTION (PREVAILING) 315 315 135 270 315 270 270 270 270 270 135 270 270 PREVAILING WIND SPEED(KNOTS) 9.1 11.5 12.6 9.8 12.5 13.0 12.4 11.9 9.3 9.3 11.8 8.3 10.5 PREVAILING WIND PERCENT 23.9 17.1 18.7 20.0 21.3 35.3 36.1 31.6 30.7 31.0 13.6 15.3 22.4 CALMS PERCENT OF WIND 38.1 40.7 29.7 30.7 25.2 14.7 20.6 24.5 33.3 39.4 48.3 59.3 35.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 176 248 1944 VECTOR WIND DIRECTION (MEAN) 272 200 202 260 271 280 272 239 268 274 204 271 263 VECTOR WIND MAGNITUDE(KNOTS) 2.2 1.0 1.8 2.5 3.0 8.4 6.6 4.9 4.2 4.1 0.9 1.4 3.2 WIND STEADINESES (MEAN %) 36.1 16.1 23.1 33.8 35.3 83.2 71.0 58.3 66.7 75.9 18.0 40.0 45.7 WIND SPEED (MEAN KNOTS) 6.1 6.2 7.8 7.4 8.5 10.1 9.3 8.4 6.3 5.4 5.0 3.5 7.0 FASTEST WIND DIRECTION 160 140 160 130 260 280 280 290 300 320 160 60 260 FASTEST WIND SPEED (KNOTS) 39 35 45 31 58 39 31 43 33 25 39 27 58 DAY 24 16 5 18 6 28 21 25 27 17 13 26 DAYS WITH SKY CLEAR (0-2)/8 12 16 19 15 15 27 31 29 30 31 21 17 263 DAYS WITH P.CLOUDY (3-6)/8 6 7 7 12 11 2 0 2 0 0 6 10 63 DAYS WITH CLOUDY (7-8)/8 13 5 5 3 5 1 0 0 0 0 3 4 39 DAYS WITH VISIBILITY =< 2 KM 7 3 1 1 3 3 4 7 0 0 1 3 33 DURATION OF SUNSHINE HOURS ****** ****** 0.0 0.0 0.0 ****** ****** 0.0 0.0 0.0 0.0 0.0 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.6 1015.1 1013.3 1009.1 1004.1 999.2 994.7 995.5 1000.9 1009.9 1015.4 1016.8 1007.7 MAX. QFE PRESSURE IN HPA 1026.1 1024.8 1023.0 1015.9 1008.9 1006.2 999.3 1001.9 1007.4 1019.0 1019.9 1021.7 1026.1 DAY-HOUR 10- 9 23- 6 1- 6 20- 6 6- 9 1- 6 1- 6 31- 3 30- 6 28- 6 28- 6 5- 6 MIN. QFE PRESSURE IN HPA 1007.2 1005.8 1004.5 1004.4 997.7 993.2 989.4 989.6 996.1 1003.8 1007.4 1009.4 989.4 DAY-HOUR 24- 3 17-12 15-15 10-15 29-15 28-15 20-15 10-15 7-15 2-12 11-12 11-15 MEAN QNH PRESSURE IN HPA 1022.5 1019.0 1017.2 1012.9 1008.0 1003.1 998.5 999.3 1004.8 1013.8 1019.3 1020.7 1011.6 MAX. QNH PRESSURE IN HPA 1030.0 1028.7 1026.9 1019.8 1012.8 1010.1 1003.2 1005.8 1011.3 1022.9 1023.8 1025.6 1030.0 DAY-HOUR 10- 9 23- 6 1- 6 20- 6 6- 9 1- 6 1- 6 31- 3 30- 6 28- 6 28- 6 5- 6 MIN. QNH PRESSURE IN HPA 1011.1 1009.7 1008.4 1008.3 1001.5 997.0 993.2 993.4 999.9 1007.7 1011.3 1013.3 993.2 DAY-HOUR 24- 3 17-12 15-15 10-15 29-15 28-15 20-15 10-15 7-15 2-12 11-12 11-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.9 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 5- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 11-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.8 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1010.9 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.8 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.9 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.0 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1015.2 1013.4 1009.0 1004.2 999.6 995.1 996.1 1000.8 1009.7 1015.2 1017.0 1007.8 MAX. QFE PRESSURE IN HPA 1024.8 1023.6 1022.3 1014.3 1007.9 1004.6 999.0 1001.9 1005.9 1017.9 1019.0 1020.3 1024.8 DAY 11 23 1 20 9 1 1 31 30 28 28 6 MIN. QFE PRESSURE IN HPA 1007.2 1007.3 1005.0 1005.9 998.9 994.9 991.4 992.8 997.0 1004.9 1009.2 1011.6 991.4 DAY 24 17 6 10 29 28 21 3 7 3 12 27 MEAN QNH PRESSURE IN HPA 1022.4 1019.1 1017.3 1012.9 1008.1 1003.5 998.9 999.9 1004.7 1013.6 1019.1 1020.9 1011.7 MAX. QNH PRESSURE IN HPA 1028.7 1027.5 1026.2 1018.2 1011.8 1008.5 1002.9 1005.8 1009.8 1021.8 1022.9 1024.2 1028.7 DAY 11 23 1 20 9 1 1 31 30 28 28 6 MIN. QNH PRESSURE IN HPA 1011.1 1011.2 1008.9 1009.8 1002.8 998.7 995.2 996.6 1000.8 1008.8 1013.1 1015.5 995.2 DAY 24 17 6 10 29 28 21 3 7 3 12 27 MEAN QFF PRESSURE IN HPA 1022.9 1019.4 1017.6 1013.1 1008.1 1003.5 998.9 999.9 1004.9 1013.8 1019.4 1021.2 1011.9 MAX. QFF PRESSURE IN HPA 1029.2 1027.9 1026.6 1018.3 1011.8 1008.5 1002.9 1005.8 1009.9 1022.0 1023.1 1024.5 1029.2 DAY 11 23 1 20 9 1 1 31 30 28 28 6 MIN. QFF PRESSURE IN HPA 1011.3 1011.5 1009.1 1009.9 1002.8 998.8 995.2 996.6 1000.9 1008.8 1013.2 1015.8 995.2 DAY 24 17 6 10 29 28 21 3 7 3 12 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1019.8 1016.4 1014.4 1010.2 1005.2 1000.2 995.7 996.7 1002.1 1011.3 1016.5 1018.3 1008.9 MAX. QFE PRESSURE IN HPA 1025.9 1024.8 1023.0 1015.9 1008.6 1006.2 999.3 1001.7 1007.4 1019.0 1019.9 1021.7 1025.9 DAY 10 23 1 20 4 1 1 31 30 28 28 5 MIN. QFE PRESSURE IN HPA 1009.5 1007.9 1005.0 1007.0 998.3 995.5 992.3 993.7 997.2 1006.3 1010.1 1012.5 992.3 DAY 24 17 5 10 13 28 3 3 7 3 12 27 MEAN QNH PRESSURE IN HPA 1023.7 1020.3 1018.3 1014.1 1009.1 1004.1 999.5 1000.5 1005.9 1015.2 1020.5 1022.2 1012.8 MAX. QNH PRESSURE IN HPA 1029.8 1028.7 1026.9 1019.8 1012.5 1010.1 1003.2 1005.6 1011.3 1022.9 1023.8 1025.6 1029.8 DAY 10 23 1 20 4 1 1 31 30 28 28 5 MIN. QNH PRESSURE IN HPA 1013.4 1011.8 1008.9 1010.9 1002.1 999.3 996.1 997.5 1001.0 1010.2 1014.0 1016.4 996.1 DAY 24 17 5 10 13 28 3 3 7 3 12 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1022.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.9 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.1 1015.9 1014.1 1010.0 1004.9 999.9 995.4 996.1 1001.8 1010.7 1015.7 1017.4 1008.4 MAX. QFE PRESSURE IN HPA 1026.1 1023.2 1022.6 1015.5 1008.9 1005.6 998.9 1001.6 1007.2 1017.9 1019.2 1021.7 1026.1 DAY 10 23 1 20 6 1 1 31 30 28 1 5 MIN. QFE PRESSURE IN HPA 1009.4 1007.3 1004.7 1006.6 998.3 995.0 991.7 992.8 997.4 1005.9 1009.1 1012.3 991.7 DAY 24 17 5 24 13 28 21 3 7 13 12 27 MEAN QNH PRESSURE IN HPA 1023.1 1019.8 1018.0 1013.9 1008.8 1003.8 999.2 1000.0 1005.6 1014.6 1019.6 1021.3 1012.3 MAX. QNH PRESSURE IN HPA 1030.0 1027.1 1026.5 1019.4 1012.8 1009.5 1002.8 1005.5 1011.1 1021.8 1023.1 1025.6 1030.0 DAY 10 23 1 20 6 1 1 31 30 28 1 5 MIN. QNH PRESSURE IN HPA 1013.3 1011.2 1008.6 1010.5 1002.1 998.8 995.5 996.6 1001.2 1009.8 1013.0 1016.2 995.5 DAY 24 17 5 24 13 28 21 3 7 13 12 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.8 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.5 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.7 1014.1 1012.4 1008.2 1003.4 998.5 993.9 994.5 1000.1 1008.8 1013.9 1015.8 1006.8 MAX. QFE PRESSURE IN HPA 1024.2 1020.9 1020.2 1013.8 1008.1 1003.8 997.8 1000.1 1005.8 1016.2 1017.7 1019.8 1024.2 DAY 10 22 1 20 16 4 10 31 30 28 1 5 MIN. QFE PRESSURE IN HPA 1009.7 1005.8 1005.6 1005.0 997.9 993.5 990.1 990.9 996.2 1003.8 1007.4 1011.2 990.1 DAY 24 17 5 9 13 28 20 2 7 2 11 11 MEAN QNH PRESSURE IN HPA 1021.6 1018.0 1016.3 1012.1 1007.3 1002.4 997.8 998.3 1003.9 1012.7 1017.8 1019.7 1010.7 MAX. QNH PRESSURE IN HPA 1028.1 1024.8 1024.1 1017.7 1012.0 1007.7 1001.6 1004.0 1009.7 1020.1 1021.6 1023.7 1028.1 DAY 10 22 1 20 16 4 10 31 30 28 1 5 MIN. QNH PRESSURE IN HPA 1013.6 1009.7 1009.5 1008.9 1001.7 997.3 993.9 994.7 1000.0 1007.7 1011.3 1015.1 993.9 DAY 24 17 5 9 13 28 20 2 7 2 11 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.9 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.3 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.1 1014.1 1012.2 1008.0 1002.8 998.0 993.4 994.0 1000.0 1009.0 1014.1 1016.1 1006.6 MAX. QFE PRESSURE IN HPA 1024.4 1021.6 1019.6 1013.2 1007.5 1002.6 997.9 999.7 1006.5 1016.1 1018.0 1020.4 1024.4 DAY 10 22 1 20 6 4 10 31 30 28 28 5 MIN. QFE PRESSURE IN HPA 1011.2 1005.8 1004.5 1004.4 997.7 993.2 989.4 989.6 996.1 1004.1 1007.5 1009.4 989.4 DAY 1 17 15 10 29 28 20 10 7 2 12 11 MEAN QNH PRESSURE IN HPA 1022.1 1018.0 1016.1 1011.8 1006.7 1001.8 997.2 997.9 1003.8 1012.9 1018.0 1020.0 1010.5 MAX. QNH PRESSURE IN HPA 1028.3 1025.5 1023.5 1017.1 1011.4 1006.5 1001.7 1003.6 1010.4 1020.0 1021.9 1024.3 1028.3 DAY 10 22 1 20 6 4 10 31 30 28 28 5 MIN. QNH PRESSURE IN HPA 1015.1 1009.7 1008.4 1008.3 1001.5 997.0 993.2 993.4 999.9 1008.0 1011.4 1013.3 993.2 DAY 1 17 15 10 29 28 20 10 7 2 12 11 MEAN QFF PRESSURE IN HPA 1022.4 1018.4 1016.4 1012.0 1006.7 1001.8 997.2 997.8 1004.0 1013.0 1018.2 1020.3 1010.7 MAX. QFF PRESSURE IN HPA 1028.7 1025.9 1023.9 1017.2 1011.4 1006.4 1001.7 1003.6 1010.5 1020.2 1022.1 1024.6 1028.7 DAY 10 22 1 20 6 4 10 31 30 28 28 5 MIN. QFF PRESSURE IN HPA 1015.3 1010.0 1008.6 1008.4 1001.6 997.0 993.1 993.4 1000.2 1008.1 1011.5 1013.5 993.1 DAY 1 17 15 10 29 28 20 10 6 2 12 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.5 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.6 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 11 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.4 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.5 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.1 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 24 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.4 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 11 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.0 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 24 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.3 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.4 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.4 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.0 15.3 19.8 25.9 29.5 34.8 37.8 34.2 32.0 25.1 19.4 11.9 24.8 MINIMUN AIR TEMPERATURE (C) 6.9 8.9 13.5 18.3 21.3 25.5 29.5 25.5 23.1 17.0 15.0 7.3 17.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 5 21 30 31 31 29 7 0 0 154 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) 2.4 3.4 7.0 13.4 13.6 21.0 26.2 22.2 20.0 7.0 8.8 2.0 2.0 DAY 24 1 1 1 2 1 15 27 14 21 21 11 MAXIMUM AIR TEMPERATURE (C) 18.2 22.4 26.3 33.1 36.6 44.2 46.1 42.9 41.6 34.0 25.1 17.6 32.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 7 26 30 30 31 31 30 25 3 0 213 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 26.0 36.4 38.0 43.0 49.0 48.2 46.8 45.2 40.2 31.6 24.4 49.0 DAY 14 12 10 20 28 11 30 6 5 1 2 3 DIF. BETWEEN (MAX.-MIN.) (C) 11.3 13.5 12.8 14.8 15.3 18.7 16.6 17.4 18.5 17.0 10.1 10.3 14.6 MEAN DAILY TEMP. (MDT) (C) 12.6 15.6 19.9 25.7 29.0 34.9 37.8 34.2 32.3 25.5 20.1 12.5 25.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.6 24.1 141.9 246.7 415.9 521.5 409.6 339.8 160.1 23.0 0.0 2283.2 HEATING DEG. DAYS(BASE 18 0C) 168.8 75.3 13.1 0.0 0.0 0.0 0.0 0.0 0.0 4.3 13.2 172.2 446.9 DEWPOINT (MEAN C) 6.2 3.1 8.0 10.2 13.6 15.0 15.5 13.5 13.2 7.6 13.1 6.5 10.5 MIXING RATIO (G/KG) 6.00 5.04 7.23 8.49 10.76 11.78 11.97 10.96 10.21 7.11 9.51 6.23 8.77 VAPOUR PRESSURE (HPA) 9.69 8.15 11.59 13.52 17.02 18.42 18.72 17.15 16.15 11.38 15.28 10.06 13.93 SATURATION DEF. (HPA) 4.88 10.03 12.64 21.66 26.25 40.78 49.76 39.22 34.08 23.15 7.94 4.40 22.90 RELATIVE HUMIDITY (MEAN %) 71 49 52 41 43 33 30 32 37 35 70 72 47 RELATIVE HUMIDITY (MAX. %) 87 69 70 59 55 47 46 46 57 52 86 86 63 RELATIVE HUMIDITY (MIN. %) 49 25 33 25 31 20 17 21 18 20 48 50 30 RELATIVE HUMIDITY (MEAN% 03UTC) 83 66 66 57 53 44 43 42 53 48 82 83 60 RELATIVE HUMIDITY (MEAN% 09UTC) 61 36 40 30 35 25 23 26 25 26 55 63 37 RELATIVE HUMIDITY (MEAN% 15UTC) 64 37 44 32 37 25 20 26 26 27 67 66 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.2 0.1 93.7 0.7 1.5 0.0 0.0 0.0 0.0 0.0 63.8 21.4 220.4 DAYS WITH PRECIPITATION >=10 0 0 3 0 0 0 0 0 0 0 3 0 6 DAYS WITH PRECIPITATION >= 5 4 0 5 0 0 0 0 0 0 0 5 2 16 DAYS WITH PRECIPITATION >= 1 6 0 6 0 1 0 0 0 0 0 7 6 26 DAYS WITH PRECIPITATION 8 2 7 2 2 0 0 0 0 1 9 8 39 GREATEST DAILY PRECIPITATION 9.0 0.1 35.0 0.6 1.0 0.0 0.0 0.0 0.0 0.0 20.3 8.8 35.0 DAY 16 8 20 17 8 ** ** ** ** ** 10 27 DAY WITH THUNDER STORM 2 1 8 3 2 0 0 0 1 0 8 6 31 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 13 13 16 23 26 31 31 17 15 4 4 195 WIND DIRECTION (PREVAILING) 270 135 270 315 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 6.9 13.5 9.5 12.2 11.1 11.8 11.7 11.8 10.6 9.0 8.8 8.2 10.6 PREVAILING WIND PERCENT 12.9 19.8 17.3 28.8 28.2 53.3 43.5 58.9 20.8 18.5 13.8 21.8 27.4 CALMS PERCENT OF WIND 56.5 32.3 30.2 22.9 25.0 17.9 11.7 13.7 32.1 39.5 48.8 54.8 32.1 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 258 201 293 285 280 275 262 273 229 212 277 280 268 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.7 1.0 4.3 4.3 8.4 6.1 8.3 2.4 1.3 0.5 1.7 3.2 WIND STEADINESES (MEAN %) 27.8 23.6 13.3 48.9 53.1 89.4 61.0 88.3 38.1 23.6 10.2 43.6 45.1 WIND SPEED (MEAN KNOTS) 3.6 7.2 7.5 8.8 8.1 9.4 10.0 9.4 6.3 5.5 4.9 3.9 7.1 FASTEST WIND DIRECTION 210 130 360 300 160 320 230 280 120 290 330 110 130 FASTEST WIND SPEED (KNOTS) 23 39 39 35 39 33 35 39 29 39 39 29 39 DAY 16 23 15 11 4 5 8 8 8 19 11 3 DAYS WITH SKY CLEAR (0-2)/8 13 18 8 17 18 30 24 30 29 29 9 15 240 DAYS WITH P.CLOUDY (3-6)/8 13 10 10 9 8 0 7 0 1 1 14 10 83 DAYS WITH CLOUDY (7-8)/8 5 1 13 4 5 0 0 0 0 1 7 6 42 DAYS WITH VISIBILITY =< 2 KM 5 3 3 7 3 14 15 12 0 4 2 2 70 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.8 1015.3 1010.9 1007.6 1004.0 995.7 994.1 995.8 1002.3 1010.9 1014.7 1016.6 1007.0 MAX. QFE PRESSURE IN HPA 1022.3 1020.5 1020.3 1014.4 1011.1 1004.1 999.2 999.8 1008.4 1021.7 1021.0 1022.9 1022.9 DAY-HOUR 5- 3 20- 9 1- 6 13- 6 2- 6 1- 6 31-21 24- 6 22- 6 20- 6 26- 6 18- 6 MIN. QFE PRESSURE IN HPA 1003.5 1007.3 1001.6 1000.7 997.0 990.0 990.1 991.2 994.1 1003.8 1008.3 1009.5 990.0 DAY-HOUR 16-18 8- 3 26- 0 16-15 28-15 16-15 20-15 5-15 1-15 8-12 11-15 3-12 MEAN QNH PRESSURE IN HPA 1019.7 1019.2 1014.8 1011.5 1007.9 999.5 998.0 999.6 1006.2 1014.7 1018.6 1020.5 1010.8 MAX. QNH PRESSURE IN HPA 1026.2 1024.4 1024.2 1018.3 1015.0 1008.0 1003.1 1003.7 1012.3 1025.6 1024.9 1026.8 1026.8 DAY-HOUR 5- 3 20- 9 1- 6 13- 6 2- 6 1- 6 31-21 24- 6 22- 6 20- 6 26- 6 18- 6 MIN. QNH PRESSURE IN HPA 1007.4 1011.2 1005.5 1004.6 1000.8 993.8 993.9 995.0 997.9 1007.7 1012.2 1013.4 993.8 DAY-HOUR 16-18 8- 3 26- 0 16-15 28-15 16-15 20-15 5-15 1-15 8-12 11-15 3-12 MEAN QFF PRESSURE IN HPA 1020.0 1019.5 1015.0 1011.6 1008.0 999.5 997.9 999.6 1006.2 1014.9 1018.8 1020.9 1011.0 MAX. QFF PRESSURE IN HPA 1026.6 1024.7 1024.6 1018.5 1015.2 1008.0 1003.0 1003.7 1012.3 1025.9 1025.1 1027.2 1027.2 DAY-HOUR 5- 3 20- 9 1- 6 13- 6 2- 6 1- 6 31-21 24- 6 22- 6 20- 6 26- 6 18- 6 MIN. QFF PRESSURE IN HPA 1007.6 1011.4 1005.6 1004.7 1000.9 993.8 993.9 995.0 998.0 1007.7 1012.4 1013.6 993.8 DAY-HOUR 16-18 8- 3 26- 0 16-15 28-15 16-15 20-15 5-15 1-15 8-12 11-15 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1015.6 1015.1 1010.7 1007.6 1004.0 995.7 994.2 995.8 1002.0 1010.5 1014.4 1016.5 1006.8 MAX. QFE PRESSURE IN HPA 1021.7 1018.4 1018.5 1013.4 1009.7 1002.7 996.5 998.5 1007.3 1020.0 1019.1 1021.7 1021.7 DAY 5 3 2 14 2 1 26 25 22 21 27 18 MIN. QFE PRESSURE IN HPA 1006.8 1007.5 1001.6 1002.6 998.7 991.5 991.5 992.2 995.7 1005.1 1010.1 1011.5 991.5 DAY 17 8 26 9 29 17 21 6 2 17 12 28 MEAN QNH PRESSURE IN HPA 1019.5 1019.0 1014.6 1011.5 1007.8 999.6 998.0 999.7 1005.9 1014.4 1018.3 1020.4 1010.7 MAX. QNH PRESSURE IN HPA 1025.6 1022.3 1022.4 1017.3 1013.6 1006.6 1000.3 1002.3 1011.2 1023.9 1023.0 1025.6 1025.6 DAY 5 3 2 14 2 1 26 25 22 21 27 18 MIN. QNH PRESSURE IN HPA 1010.7 1011.4 1005.5 1006.5 1002.6 995.3 995.3 996.0 999.5 1009.0 1014.0 1015.4 995.3 DAY 17 8 26 9 29 17 21 6 2 17 12 28 MEAN QFF PRESSURE IN HPA 1019.8 1019.3 1014.8 1011.6 1007.9 999.5 998.0 999.7 1005.9 1014.5 1018.5 1020.7 1010.8 MAX. QFF PRESSURE IN HPA 1025.9 1022.6 1022.7 1017.4 1013.7 1006.6 1000.3 1002.3 1011.2 1024.2 1023.2 1026.0 1026.0 DAY 5 3 2 14 2 1 26 25 22 21 27 18 MIN. QFF PRESSURE IN HPA 1010.9 1011.6 1005.6 1006.5 1002.6 995.3 995.3 996.0 999.5 1009.1 1014.2 1015.6 995.3 DAY 17 8 26 9 29 17 21 6 2 17 12 28 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1015.7 1015.2 1010.9 1007.8 1004.0 996.1 994.6 996.2 1002.4 1010.7 1014.5 1016.4 1007.0 MAX. QFE PRESSURE IN HPA 1022.3 1018.6 1018.2 1013.6 1010.1 1003.6 997.3 999.0 1007.4 1019.0 1019.4 1021.4 1022.3 DAY 5 21 1 13 2 1 26 24 29 20 26 18 MIN. QFE PRESSURE IN HPA 1010.0 1007.3 1001.8 1002.8 999.0 991.8 992.4 992.5 996.0 1004.7 1010.1 1011.3 991.8 DAY 16 8 26 9 29 17 21 6 1 19 9 28 MEAN QNH PRESSURE IN HPA 1019.6 1019.1 1014.8 1011.7 1007.8 999.9 998.4 1000.0 1006.3 1014.6 1018.4 1020.3 1010.9 MAX. QNH PRESSURE IN HPA 1026.2 1022.5 1022.1 1017.5 1014.0 1007.5 1001.1 1002.9 1011.3 1022.9 1023.3 1025.3 1026.2 DAY 5 21 1 13 2 1 26 24 29 20 26 18 MIN. QNH PRESSURE IN HPA 1013.9 1011.2 1005.7 1006.7 1002.9 995.6 996.2 996.3 999.8 1008.6 1014.0 1015.2 995.6 DAY 16 8 26 9 29 17 21 6 1 19 9 28 MEAN QFF PRESSURE IN HPA 1019.9 1019.4 1015.0 1011.8 1007.9 999.9 998.4 1000.0 1006.3 1014.8 1018.6 1020.7 1011.1 MAX. QFF PRESSURE IN HPA 1026.6 1022.8 1022.4 1017.7 1014.2 1007.6 1001.1 1002.9 1011.4 1023.2 1023.5 1025.7 1026.6 DAY 5 1 1 13 2 1 26 24 29 20 26 18 MIN. QFF PRESSURE IN HPA 1014.1 1011.4 1005.8 1006.8 1002.9 995.6 996.2 996.3 999.9 1008.7 1014.2 1015.5 995.6 DAY 16 8 26 9 29 17 21 6 1 19 9 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.9 1016.5 1012.1 1008.6 1005.2 996.8 995.2 996.9 1003.7 1012.3 1016.1 1017.9 1008.2 MAX. QFE PRESSURE IN HPA 1022.1 1020.2 1020.3 1014.4 1011.1 1004.1 998.3 999.8 1008.4 1021.7 1021.0 1022.9 1022.9 DAY 5 29 1 13 2 1 26 24 22 20 26 18 MIN. QFE PRESSURE IN HPA 1011.3 1009.6 1005.2 1004.1 999.7 992.9 992.8 993.2 997.1 1005.6 1014.0 1013.0 992.8 DAY 16 8 26 24 28 16 20 6 1 17 15 28 MEAN QNH PRESSURE IN HPA 1020.8 1020.4 1016.0 1012.5 1009.0 1000.6 999.1 1000.7 1007.6 1016.1 1020.0 1021.8 1012.1 MAX. QNH PRESSURE IN HPA 1026.0 1024.1 1024.2 1018.3 1015.0 1008.0 1002.1 1003.7 1012.3 1025.6 1024.9 1026.8 1026.8 DAY 5 29 1 13 2 1 26 24 22 20 26 18 MIN. QNH PRESSURE IN HPA 1015.2 1013.5 1009.1 1008.0 1003.6 996.7 996.6 997.0 1000.9 1009.5 1017.9 1016.9 996.6 DAY 16 8 26 24 28 16 20 6 1 17 15 28 MEAN QFF PRESSURE IN HPA 1021.2 1020.7 1016.2 1012.6 1009.1 1000.6 999.0 1000.7 1007.6 1016.3 1020.2 1022.1 1012.2 MAX. QFF PRESSURE IN HPA 1026.4 1024.5 1024.6 1018.5 1015.2 1008.0 1002.1 1003.7 1012.3 1025.9 1025.1 1027.2 1027.2 DAY 5 29 1 13 2 1 26 24 22 20 26 18 MIN. QFF PRESSURE IN HPA 1015.5 1013.7 1009.3 1008.0 1003.5 996.7 996.6 997.0 1001.0 1009.6 1018.2 1017.2 996.6 DAY 16 8 26 24 28 16 20 6 1 17 15 28 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1016.6 1016.2 1011.8 1008.3 1005.0 996.4 994.8 996.5 1003.2 1011.6 1015.3 1017.2 1007.7 MAX. QFE PRESSURE IN HPA 1022.1 1020.5 1020.3 1013.8 1010.3 1003.2 998.1 999.8 1007.9 1021.0 1020.0 1022.4 1022.4 DAY 4 20 1 13 2 1 26 24 22 20 26 18 MIN. QFE PRESSURE IN HPA 1008.8 1010.4 1005.3 1001.7 998.8 992.3 992.3 992.8 996.6 1005.4 1011.6 1011.7 992.3 DAY 16 8 15 24 28 16 20 6 1 8 11 3 MEAN QNH PRESSURE IN HPA 1020.5 1020.1 1015.7 1012.2 1008.9 1000.2 998.6 1000.4 1007.1 1015.4 1019.2 1021.1 1011.6 MAX. QNH PRESSURE IN HPA 1026.0 1024.4 1024.2 1017.7 1014.2 1007.1 1001.9 1003.7 1011.8 1024.9 1023.9 1026.3 1026.3 DAY 4 20 1 13 2 1 26 24 22 20 26 18 MIN. QNH PRESSURE IN HPA 1012.7 1014.3 1009.2 1005.6 1002.7 996.1 996.1 996.6 1000.4 1009.3 1015.5 1015.6 996.1 DAY 16 8 15 24 28 16 20 6 1 8 11 3 MEAN QFF PRESSURE IN HPA 1020.8 1020.3 1015.9 1012.3 1008.9 1000.2 998.5 1000.3 1007.1 1015.6 1019.4 1021.5 1011.7 MAX. QFF PRESSURE IN HPA 1026.3 1024.7 1024.5 1017.9 1014.4 1007.1 1001.9 1003.6 1011.8 1025.2 1024.1 1026.7 1026.7 DAY 4 20 1 13 2 1 26 24 22 20 26 18 MIN. QFF PRESSURE IN HPA 1012.9 1014.5 1009.4 1005.6 1002.6 996.1 996.0 996.6 1000.4 1009.3 1015.7 1015.8 996.0 DAY 16 8 26 24 28 16 20 6 1 8 11 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.1 1014.4 1010.0 1007.0 1003.6 995.0 993.2 994.9 1001.4 1010.0 1013.9 1015.7 1006.2 MAX. QFE PRESSURE IN HPA 1020.8 1018.5 1018.1 1012.2 1008.4 1001.6 996.4 998.0 1005.9 1019.3 1018.8 1020.5 1020.8 DAY 4 20 1 12 1 1 26 24 22 20 26 18 MIN. QFE PRESSURE IN HPA 1006.3 1009.4 1002.2 1000.8 997.2 990.8 990.4 991.5 994.7 1003.8 1009.9 1009.5 990.4 DAY 16 7 15 16 28 16 20 6 1 8 11 3 MEAN QNH PRESSURE IN HPA 1019.0 1018.3 1013.9 1010.8 1007.5 998.8 997.1 998.8 1005.3 1013.9 1017.8 1019.6 1010.1 MAX. QNH PRESSURE IN HPA 1024.7 1022.4 1022.0 1016.1 1012.3 1005.5 1000.2 1001.8 1009.8 1023.2 1022.7 1024.4 1024.7 DAY 4 20 1 12 1 1 26 24 22 20 26 18 MIN. QNH PRESSURE IN HPA 1010.2 1013.3 1006.1 1004.7 1001.0 994.6 994.2 995.3 998.5 1007.7 1013.8 1013.4 994.2 DAY 16 7 15 16 28 16 20 6 1 8 11 3 MEAN QFF PRESSURE IN HPA 1019.3 1018.6 1014.1 1010.9 1007.5 998.8 997.0 998.7 1005.3 1014.0 1017.9 1019.9 1010.2 MAX. QFF PRESSURE IN HPA 1025.0 1022.7 1022.3 1016.2 1012.4 1005.5 1000.2 1001.8 1009.8 1023.5 1022.9 1024.8 1025.0 DAY 4 20 1 12 2 1 26 24 22 20 26 18 MIN. QFF PRESSURE IN HPA 1010.5 1013.5 1006.3 1004.7 1001.0 994.6 994.1 995.3 998.5 1007.7 1014.0 1013.6 994.1 DAY 16 7 15 16 28 16 20 6 1 8 11 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.0 1014.5 1009.9 1006.4 1003.0 994.3 992.7 994.5 1001.2 1010.0 1014.1 1016.1 1006.0 MAX. QFE PRESSURE IN HPA 1021.4 1017.9 1017.9 1012.0 1008.5 1000.6 996.2 997.4 1005.9 1019.2 1019.0 1020.8 1021.4 DAY 4 1 1 13 1 1 31 24 26 20 26 17 MIN. QFE PRESSURE IN HPA 1005.0 1008.1 1002.5 1000.7 997.0 990.0 990.1 991.2 994.1 1004.2 1008.3 1010.1 990.0 DAY 16 7 15 16 28 16 20 5 1 8 11 3 MEAN QNH PRESSURE IN HPA 1018.9 1018.4 1013.8 1010.3 1006.9 998.2 996.5 998.3 1005.1 1013.9 1018.0 1020.0 1009.8 MAX. QNH PRESSURE IN HPA 1025.3 1021.8 1021.8 1015.9 1012.4 1004.5 1000.0 1001.2 1009.8 1023.1 1022.9 1024.7 1025.3 DAY 4 1 1 13 1 1 31 24 26 20 26 17 MIN. QNH PRESSURE IN HPA 1008.9 1012.0 1006.4 1004.6 1000.8 993.8 993.9 995.0 997.9 1008.1 1012.2 1014.0 993.8 DAY 16 7 15 16 28 16 20 5 1 8 11 3 MEAN QFF PRESSURE IN HPA 1019.3 1018.7 1014.0 1010.4 1006.9 998.2 996.5 998.3 1005.1 1014.0 1018.2 1020.3 1010.0 MAX. QFF PRESSURE IN HPA 1025.7 1022.2 1022.1 1016.1 1012.5 1004.5 1000.0 1001.2 1009.8 1023.4 1023.1 1025.1 1025.7 DAY 4 1 1 13 1 1 31 24 26 20 26 17 MIN. QFF PRESSURE IN HPA 1009.1 1012.3 1006.6 1004.7 1000.9 993.8 993.9 995.0 998.0 1008.1 1012.4 1014.2 993.8 DAY 16 7 15 16 28 16 20 5 1 8 11 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1015.7 1015.3 1010.6 1007.3 1003.8 995.4 993.9 995.6 1002.3 1010.9 1014.6 1016.7 1006.8 MAX. QFE PRESSURE IN HPA 1021.8 1018.6 1018.6 1013.3 1010.2 1001.6 998.2 998.6 1007.0 1019.5 1019.7 1022.1 1022.1 DAY 4 2 1 13 1 1 31 24 26 20 26 17 MIN. QFE PRESSURE IN HPA 1003.5 1008.3 1002.5 1003.1 997.6 990.6 991.1 992.4 995.0 1005.2 1008.3 1012.0 990.6 DAY 16 7 25 16 28 16 20 5 1 7 11 3 MEAN QNH PRESSURE IN HPA 1019.6 1019.2 1014.5 1011.2 1007.7 999.2 997.7 999.4 1006.2 1014.8 1018.5 1020.6 1010.7 MAX. QNH PRESSURE IN HPA 1025.7 1022.5 1022.5 1017.2 1014.1 1005.5 1002.0 1002.4 1010.9 1023.4 1023.6 1026.0 1026.0 DAY 4 2 1 13 1 1 31 24 26 20 26 17 MIN. QNH PRESSURE IN HPA 1007.4 1012.2 1006.4 1007.0 1001.4 994.4 994.9 996.2 998.8 1009.1 1012.2 1015.9 994.4 DAY 16 7 25 16 28 16 20 5 1 7 11 3 MEAN QFF PRESSURE IN HPA 1019.9 1019.5 1014.7 1011.3 1007.7 999.2 997.7 999.4 1006.2 1015.0 1018.8 1020.9 1010.9 MAX. QFF PRESSURE IN HPA 1026.1 1022.9 1022.8 1017.4 1014.2 1005.5 1002.0 1002.5 1010.9 1023.7 1023.8 1026.4 1026.4 DAY 4 2 1 13 1 1 31 24 26 20 26 17 MIN. QFF PRESSURE IN HPA 1007.6 1012.5 1006.6 1007.0 1001.4 994.4 994.9 996.2 998.9 1009.1 1012.4 1016.1 994.4 DAY 16 7 25 16 28 16 20 5 1 7 11 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1015.7 1015.4 1011.0 1007.8 1004.0 995.7 994.5 995.9 1002.5 1011.0 1014.9 1016.7 1007.1 MAX. QFE PRESSURE IN HPA 1022.1 1018.6 1018.8 1013.5 1011.0 1001.4 999.2 999.0 1006.9 1019.8 1019.2 1022.2 1022.2 DAY 4 2 1 13 1 4 31 24 21 20 26 17 MIN. QFE PRESSURE IN HPA 1004.8 1008.1 1005.6 1003.9 999.0 991.1 991.7 992.6 995.8 1005.9 1011.6 1011.8 991.1 DAY 16 7 14 8 28 16 20 5 1 7 14 3 MEAN QNH PRESSURE IN HPA 1019.6 1019.3 1014.9 1011.7 1007.9 999.6 998.4 999.8 1006.4 1014.9 1018.8 1020.6 1011.0 MAX. QNH PRESSURE IN HPA 1026.0 1022.5 1022.7 1017.4 1014.9 1005.3 1003.1 1002.9 1010.8 1023.7 1023.1 1026.1 1026.1 DAY 4 2 1 13 1 4 31 24 21 20 26 17 MIN. QNH PRESSURE IN HPA 1008.7 1012.0 1009.5 1007.8 1002.9 994.9 995.5 996.4 999.6 1009.8 1015.5 1015.7 994.9 DAY 16 7 14 8 28 16 20 5 1 7 14 3 MEAN QFF PRESSURE IN HPA 1020.0 1019.5 1015.1 1011.8 1007.9 999.6 998.3 999.8 1006.4 1015.0 1019.0 1020.9 1011.1 MAX. QFF PRESSURE IN HPA 1026.4 1022.9 1023.0 1017.5 1015.0 1005.2 1003.0 1002.8 1010.8 1024.0 1023.3 1026.5 1026.5 DAY 4 2 1 13 1 4 31 24 21 20 26 17 MIN. QFF PRESSURE IN HPA 1008.9 1012.2 1009.7 1007.8 1002.8 994.9 995.5 996.4 999.7 1009.8 1015.7 1015.9 994.9 DAY 16 7 14 16 28 16 20 5 1 7 14 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 14.1 12.7 18.5 25.1 31.7 34.5 36.2 36.5 32.4 25.1 19.6 13.2 25.0 MINIMUN AIR TEMPERATURE (C) 10.0 7.1 11.8 17.3 22.4 23.6 26.1 26.3 22.6 16.1 13.3 8.4 17.1 DAYS WITH MINIMUM TEMP. >=21 0 0 3 3 25 27 30 31 22 3 0 0 144 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 3 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS LOWEST(C) 4.6 -0.8 0.4 13.0 15.4 20.0 21.4 21.4 17.8 10.0 8.4 2.0 -0.8 DAY 18 24 4 9 5 1 29 14 26 24 30 6 MAXIMUM AIR TEMPERATURE (C) 19.6 19.4 25.4 32.7 40.4 44.8 46.5 46.4 43.1 35.6 27.4 19.1 33.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 9 23 31 30 31 31 30 29 9 0 223 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.4 25.0 34.0 37.8 46.8 49.2 50.6 48.2 46.2 43.6 33.0 27.2 50.6 DAY 28 13 19 19 30 28 10 19 1 1 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 12.3 13.6 15.4 18.0 21.2 20.4 20.1 20.5 19.5 14.1 10.7 16.3 MEAN DAILY TEMP. (MDT) (C) 14.8 13.3 18.6 25.0 31.4 34.2 36.3 36.4 32.8 25.8 20.3 13.8 25.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 41.6 120.4 322.3 396.9 459.7 476.1 355.4 152.5 19.2 0.0 2344.1 HEATING DEG. DAYS(BASE 18 0C) 103.9 132.6 74.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.5 135.3 449.2 DEWPOINT (MEAN C) 10.3 3.8 2.3 9.4 10.8 10.7 11.9 15.1 11.2 8.1 9.2 7.3 9.2 MIXING RATIO (G/KG) 7.94 5.25 4.99 7.67 8.47 8.52 9.48 11.35 8.96 7.26 7.47 6.63 7.83 VAPOUR PRESSURE (HPA) 12.78 8.47 8.03 12.25 13.46 13.45 14.88 17.81 14.18 11.61 12.02 10.71 12.47 SATURATION DEF. (HPA) 3.86 7.01 15.24 21.29 36.47 45.52 49.43 47.37 38.22 23.14 11.77 5.17 25.38 RELATIVE HUMIDITY (MEAN %) 79 58 37 40 31 26 26 31 31 37 55 70 43 RELATIVE HUMIDITY (MAX. %) 92 78 58 60 47 42 39 52 51 49 73 84 60 RELATIVE HUMIDITY (MIN. %) 60 36 19 23 18 14 14 16 15 24 35 51 27 RELATIVE HUMIDITY (MEAN% 03UTC) 90 76 55 57 44 39 37 49 48 46 68 79 57 RELATIVE HUMIDITY (MEAN% 09UTC) 71 46 27 30 20 18 19 20 22 28 41 60 34 RELATIVE HUMIDITY (MEAN% 15UTC) 74 47 25 29 23 17 18 20 19 32 48 67 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.0 9.8 2.9 4.3 2.9 0.0 0.0 0.0 0.0 0.0 50.2 65.1 167.2 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 1 3 5 DAYS WITH PRECIPITATION >= 5 2 1 0 0 0 0 0 0 0 0 2 4 9 DAYS WITH PRECIPITATION >= 1 4 2 2 1 1 0 0 0 0 0 2 6 18 DAYS WITH PRECIPITATION 9 3 4 4 1 0 0 0 0 0 5 11 37 GREATEST DAILY PRECIPITATION 18.1 7.0 1.3 2.8 2.9 0.0 0.0 0.0 0.0 0.0 43.2 23.1 43.2 DAY 2 1 3 24 12 ** ** ** ** ** 12 19 DAY WITH THUNDER STORM 2 1 1 3 1 0 0 1 0 0 3 6 18 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 4 12 18 15 13 13 19 6 2 9 4 6 121 WIND DIRECTION (PREVAILING) 135 315 315 315 315 315 315 180 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 10.0 10.8 9.2 10.2 10.9 12.1 11.6 9.2 9.4 9.6 8.9 9.6 10.4 PREVAILING WIND PERCENT 11.3 27.7 33.1 32.1 47.2 45.8 50.4 19.4 23.3 41.1 30.0 23.4 31.4 CALMS PERCENT OF WIND 60.1 31.7 29.4 23.3 23.0 25.4 20.2 36.7 32.5 34.3 48.3 44.4 34.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 211 293 314 280 320 306 305 241 291 316 308 326 302 VECTOR WIND MAGNITUDE(KNOTS) 0.7 3.1 3.3 2.5 5.8 6.8 7.2 2.9 2.5 4.6 1.8 0.6 3.2 WIND STEADINESES (MEAN %) 21.9 43.7 50.8 30.5 72.5 81.0 80.9 46.0 44.6 75.4 36.7 10.3 48.5 WIND SPEED (MEAN KNOTS) 3.2 7.1 6.5 8.2 8.0 8.4 8.9 6.3 5.6 6.1 4.9 5.8 6.6 FASTEST WIND DIRECTION 120 180 350 240 10 300 310 240 340 340 330 180 240 FASTEST WIND SPEED (KNOTS) 17 39 21 49 29 27 29 25 25 27 31 29 49 DAY 18 26 1 23 2 1 21 13 14 3 12 16 DAYS WITH SKY CLEAR (0-2)/8 8 16 12 14 17 30 28 29 30 29 13 15 241 DAYS WITH P.CLOUDY (3-6)/8 16 7 11 10 7 0 3 2 0 2 12 4 74 DAYS WITH CLOUDY (7-8)/8 7 5 8 6 7 0 0 0 0 0 5 12 50 DAYS WITH VISIBILITY =< 2 KM 6 2 0 1 0 0 4 1 0 1 4 5 24 DURATION OF SUNSHINE HOURS 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 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.0 1014.0 1012.5 1007.2 1002.9 996.7 994.1 996.1 1001.9 1009.6 1014.0 1016.5 1006.7 MAX. QFE PRESSURE IN HPA 1020.7 1022.2 1023.3 1011.7 1009.7 1001.6 999.1 1001.6 1009.4 1015.8 1018.3 1023.2 1023.3 DAY-HOUR 24- 6 23- 9 5- 6 5- 6 12-15 9- 6 3- 6 30- 6 30- 6 31- 6 17- 6 31- 9 MIN. QFE PRESSURE IN HPA 1008.0 1002.8 1000.9 1001.1 996.6 991.2 989.7 990.0 995.1 1003.6 1007.8 1002.1 989.7 DAY-HOUR 2- 9 26- 3 23-15 23-15 29-15 27-15 8-15 7-15 5-15 9-12 10-12 18-15 MEAN QNH PRESSURE IN HPA 1018.9 1017.9 1016.4 1011.0 1006.8 1000.5 998.0 999.9 1005.7 1013.5 1017.9 1020.4 1010.6 MAX. QNH PRESSURE IN HPA 1024.6 1026.1 1027.2 1015.6 1013.6 1005.5 1003.0 1005.5 1013.3 1019.7 1022.2 1027.1 1027.2 DAY-HOUR 24- 6 23- 9 5- 6 5- 6 12-15 9- 6 3- 6 30- 6 30- 6 31- 6 17- 6 31- 9 MIN. QNH PRESSURE IN HPA 1011.9 1006.7 1004.8 1005.0 1000.4 995.0 993.5 993.8 998.9 1007.5 1011.7 1006.0 993.5 DAY-HOUR 2- 9 26- 3 23-15 23-15 29-15 27-15 8-15 7-15 5-15 9-12 10-12 18-15 MEAN QFF PRESSURE IN HPA 1019.2 1018.2 1016.6 1011.2 1006.8 1000.5 997.9 999.9 1005.8 1013.6 1018.1 1020.7 1010.7 MAX. QFF PRESSURE IN HPA 1025.0 1026.5 1027.6 1015.8 1013.7 1005.5 1002.9 1005.4 1013.3 1019.9 1022.5 1027.5 1027.6 DAY-HOUR 24- 6 23- 9 5- 6 5- 6 12-15 9- 6 3- 6 30- 6 30- 6 31- 6 17- 6 31- 9 MIN. QFF PRESSURE IN HPA 1012.2 1006.9 1004.9 1005.0 1000.5 995.0 993.5 993.8 998.9 1007.5 1011.9 1006.2 993.5 DAY-HOUR 2- 9 26- 3 23-15 23-15 29-15 27-15 9-15 7-15 5-15 9-12 10-12 18-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1014.9 1013.5 1012.4 1006.8 1002.7 996.7 994.2 995.9 1001.4 1009.3 1013.8 1016.2 1006.5 MAX. QFE PRESSURE IN HPA 1019.1 1020.4 1021.8 1009.7 1007.4 1000.7 998.7 1000.3 1007.0 1014.0 1016.5 1022.7 1022.7 DAY 14 28 9 7 13 9 3 31 30 22 18 30 MIN. QFE PRESSURE IN HPA 1010.2 1003.0 1001.3 1002.6 997.0 992.4 991.0 991.2 996.1 1004.1 1008.1 1002.8 991.0 DAY 3 26 24 20 26 28 10 7 6 10 11 19 MEAN QNH PRESSURE IN HPA 1018.8 1017.4 1016.3 1010.7 1006.6 1000.6 998.0 999.7 1005.3 1013.2 1017.7 1020.1 1010.4 MAX. QNH PRESSURE IN HPA 1023.0 1024.3 1025.7 1013.6 1011.3 1004.6 1002.6 1004.2 1010.9 1017.9 1020.4 1026.6 1026.6 DAY 14 28 9 7 13 9 3 31 30 22 18 30 MIN. QNH PRESSURE IN HPA 1014.1 1006.9 1005.2 1006.5 1000.8 996.2 994.8 995.0 999.9 1008.0 1012.0 1006.7 994.8 DAY 3 26 24 20 26 28 10 7 6 10 11 19 MEAN QFF PRESSURE IN HPA 1019.1 1017.7 1016.5 1010.8 1006.6 1000.6 998.0 999.7 1005.3 1013.3 1017.8 1020.4 1010.5 MAX. QFF PRESSURE IN HPA 1023.3 1024.6 1026.1 1013.7 1011.4 1004.6 1002.5 1004.1 1010.9 1018.0 1020.6 1027.0 1027.0 DAY 24 28 9 7 13 9 3 31 30 22 18 30 MIN. QFF PRESSURE IN HPA 1014.4 1007.1 1005.3 1006.5 1000.8 996.2 994.8 995.0 999.9 1008.0 1012.1 1006.9 994.8 DAY 3 26 24 20 26 28 10 7 6 10 11 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1015.0 1013.7 1012.6 1007.1 1003.1 997.1 994.6 996.6 1002.1 1009.5 1014.1 1016.2 1006.8 MAX. QFE PRESSURE IN HPA 1019.4 1021.1 1022.1 1009.6 1008.0 1000.5 997.9 1000.7 1007.7 1014.2 1017.3 1021.9 1022.1 DAY 24 28 5 11 12 9 3 30 30 31 17 30 MIN. QFE PRESSURE IN HPA 1010.2 1002.8 1003.0 1002.9 997.7 993.3 991.6 991.2 996.7 1004.6 1009.0 1002.8 991.2 DAY 2 26 24 20 26 28 26 7 6 10 11 19 MEAN QNH PRESSURE IN HPA 1018.9 1017.6 1016.5 1011.0 1007.0 1000.9 998.4 1000.4 1005.9 1013.4 1018.0 1020.1 1010.7 MAX. QNH PRESSURE IN HPA 1023.3 1025.0 1026.0 1013.5 1011.9 1004.4 1001.7 1004.6 1011.6 1018.1 1021.2 1025.8 1026.0 DAY 24 28 5 11 12 9 3 30 30 31 17 30 MIN. QNH PRESSURE IN HPA 1014.1 1006.7 1006.9 1006.8 1001.5 997.1 995.4 995.0 1000.5 1008.5 1012.9 1006.7 995.0 DAY 2 26 24 20 26 28 26 7 6 10 11 19 MEAN QFF PRESSURE IN HPA 1019.2 1017.9 1016.8 1011.2 1007.0 1001.0 998.4 1000.4 1006.0 1013.6 1018.2 1020.4 1010.8 MAX. QFF PRESSURE IN HPA 1023.6 1025.4 1026.4 1013.7 1012.0 1004.4 1001.7 1004.5 1011.7 1018.3 1021.5 1026.2 1026.4 DAY 24 28 5 11 12 10 3 31 30 31 17 30 MIN. QFF PRESSURE IN HPA 1014.4 1006.9 1007.0 1006.9 1001.5 997.1 995.4 995.0 1000.5 1008.6 1013.1 1006.9 995.0 DAY 2 26 24 20 26 28 26 7 6 10 11 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.2 1014.9 1014.1 1008.6 1004.3 997.8 995.3 997.4 1003.4 1010.9 1015.4 1017.4 1008.0 MAX. QFE PRESSURE IN HPA 1020.7 1022.2 1023.3 1011.7 1009.2 1001.6 999.1 1001.6 1009.4 1015.8 1018.3 1023.1 1023.3 DAY 24 28 5 5 12 9 3 30 30 31 17 29 MIN. QFE PRESSURE IN HPA 1010.2 1002.9 1005.5 1005.0 999.2 994.4 992.0 991.9 998.0 1006.4 1010.3 1004.0 991.9 DAY 2 26 24 20 26 28 26 7 6 8 11 19 MEAN QNH PRESSURE IN HPA 1020.1 1018.8 1018.0 1012.5 1008.1 1001.7 999.1 1001.3 1007.3 1014.7 1019.3 1021.3 1011.9 MAX. QNH PRESSURE IN HPA 1024.6 1026.1 1027.2 1015.6 1013.1 1005.5 1003.0 1005.5 1013.3 1019.7 1022.2 1027.0 1027.2 DAY 24 28 5 5 12 9 3 30 30 31 17 29 MIN. QNH PRESSURE IN HPA 1014.1 1006.8 1009.4 1008.9 1003.1 998.2 995.8 995.7 1001.8 1010.3 1014.2 1007.9 995.7 DAY 2 26 24 20 26 28 26 7 6 8 11 19 MEAN QFF PRESSURE IN HPA 1020.4 1019.1 1018.2 1012.6 1008.2 1001.7 999.1 1001.3 1007.3 1014.9 1019.6 1021.7 1012.0 MAX. QFF PRESSURE IN HPA 1025.0 1026.5 1027.6 1015.8 1013.2 1005.5 1002.9 1005.4 1013.3 1019.9 1022.5 1027.4 1027.6 DAY 24 28 5 5 12 9 3 30 30 31 17 29 MIN. QFF PRESSURE IN HPA 1014.4 1007.0 1009.5 1009.0 1003.0 998.2 995.8 995.7 1001.9 1010.4 1014.4 1008.1 995.7 DAY 2 26 24 20 26 28 26 7 6 8 11 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1015.5 1014.7 1013.7 1008.2 1003.8 997.4 994.9 996.9 1002.8 1010.3 1014.6 1016.7 1007.5 MAX. QFE PRESSURE IN HPA 1020.4 1022.2 1023.0 1011.3 1008.0 1001.4 998.8 1001.2 1008.9 1015.3 1018.0 1023.2 1023.2 DAY 24 23 5 5 12 9 3 30 30 31 17 31 MIN. QFE PRESSURE IN HPA 1008.0 1003.3 1006.1 1004.1 998.7 994.0 991.5 991.7 997.9 1005.5 1009.6 1005.1 991.5 DAY 2 26 24 19 29 28 26 7 5 8 10 19 MEAN QNH PRESSURE IN HPA 1019.4 1018.6 1017.6 1012.1 1007.7 1001.3 998.7 1000.8 1006.7 1014.2 1018.5 1020.7 1011.4 MAX. QNH PRESSURE IN HPA 1024.3 1026.1 1026.9 1015.2 1011.9 1005.3 1002.7 1005.1 1012.8 1019.2 1021.9 1027.1 1027.1 DAY 24 23 5 5 12 9 3 30 30 31 17 31 MIN. QNH PRESSURE IN HPA 1011.9 1007.2 1010.0 1008.0 1002.6 997.8 995.3 995.5 1001.7 1009.4 1013.5 1009.0 995.3 DAY 2 26 24 19 29 28 26 7 5 8 10 19 MEAN QFF PRESSURE IN HPA 1019.7 1018.9 1017.8 1012.2 1007.7 1001.3 998.7 1000.7 1006.7 1014.3 1018.7 1020.9 1011.5 MAX. QFF PRESSURE IN HPA 1024.6 1026.5 1027.3 1015.3 1011.9 1005.3 1002.6 1005.0 1012.8 1019.4 1022.1 1027.5 1027.5 DAY 24 23 5 5 12 9 3 30 30 31 17 31 MIN. QFF PRESSURE IN HPA 1012.2 1007.4 1010.1 1008.0 1002.6 997.8 995.3 995.5 1001.7 1009.5 1013.7 1009.2 995.3 DAY 2 26 24 19 29 28 26 7 5 8 10 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.0 1013.1 1011.8 1006.5 1002.3 995.9 993.3 995.1 1001.0 1008.6 1013.1 1015.6 1005.8 MAX. QFE PRESSURE IN HPA 1018.3 1019.9 1021.6 1010.7 1007.4 999.8 997.7 999.8 1007.0 1013.5 1016.5 1021.2 1021.6 DAY 24 23 9 5 12 9 2 30 30 31 17 29 MIN. QFE PRESSURE IN HPA 1008.6 1003.3 1002.6 1001.8 997.2 992.1 990.0 990.7 995.8 1003.6 1007.8 1003.3 990.0 DAY 2 1 23 19 29 28 10 7 5 9 10 18 MEAN QNH PRESSURE IN HPA 1017.9 1017.0 1015.6 1010.4 1006.1 999.7 997.1 998.9 1004.9 1012.5 1017.0 1019.5 1009.7 MAX. QNH PRESSURE IN HPA 1022.2 1023.8 1025.5 1014.6 1011.3 1003.7 1001.5 1003.7 1010.9 1017.4 1020.4 1025.1 1025.5 DAY 24 23 9 5 12 9 2 30 30 31 17 29 MIN. QNH PRESSURE IN HPA 1012.5 1007.2 1006.5 1005.7 1001.0 995.9 993.8 994.5 999.6 1007.5 1011.7 1007.2 993.8 DAY 2 1 23 19 29 28 10 7 5 9 10 18 MEAN QFF PRESSURE IN HPA 1018.1 1017.2 1015.9 1010.5 1006.2 999.7 997.1 998.9 1004.9 1012.6 1017.2 1019.8 1009.8 MAX. QFF PRESSURE IN HPA 1022.5 1024.2 1025.9 1014.8 1011.4 1003.7 1001.5 1003.6 1010.9 1017.6 1020.6 1025.5 1025.9 DAY 24 23 9 5 12 9 2 30 30 31 17 29 MIN. QFF PRESSURE IN HPA 1012.8 1007.4 1006.6 1005.7 1001.0 995.9 993.8 994.5 999.6 1007.5 1011.9 1007.4 993.8 DAY 2 1 23 19 29 28 10 7 5 9 10 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1014.3 1013.3 1011.3 1006.0 1001.8 995.3 992.6 994.7 1000.8 1008.7 1013.3 1016.0 1005.7 MAX. QFE PRESSURE IN HPA 1018.7 1020.0 1021.5 1009.8 1009.7 999.3 997.3 999.4 1006.6 1013.7 1016.5 1022.2 1022.2 DAY 24 23 9 5 12 9 2 30 30 21 17 29 MIN. QFE PRESSURE IN HPA 1009.8 1004.5 1000.9 1001.1 996.6 991.2 989.7 990.0 995.1 1003.8 1008.4 1002.1 989.7 DAY 29 1 23 23 29 27 8 7 5 9 10 18 MEAN QNH PRESSURE IN HPA 1018.2 1017.2 1015.2 1009.9 1005.7 999.1 996.4 998.5 1004.6 1012.6 1017.2 1019.9 1009.5 MAX. QNH PRESSURE IN HPA 1022.6 1023.9 1025.4 1013.7 1013.6 1003.2 1001.1 1003.3 1010.5 1017.6 1020.4 1026.1 1026.1 DAY 24 23 9 5 12 9 2 30 30 21 17 29 MIN. QNH PRESSURE IN HPA 1013.7 1008.4 1004.8 1005.0 1000.4 995.0 993.5 993.8 998.9 1007.7 1012.3 1006.0 993.5 DAY 29 1 23 23 29 27 8 7 5 9 10 18 MEAN QFF PRESSURE IN HPA 1018.5 1017.5 1015.4 1010.0 1005.7 999.1 996.4 998.5 1004.7 1012.8 1017.5 1020.3 1009.7 MAX. QFF PRESSURE IN HPA 1022.9 1024.4 1025.8 1013.9 1013.7 1003.2 1001.1 1003.2 1010.6 1017.8 1020.7 1026.5 1026.5 DAY 24 23 9 5 12 9 2 30 30 21 17 29 MIN. QFF PRESSURE IN HPA 1013.9 1008.6 1004.9 1005.0 1000.5 995.0 993.5 993.8 998.9 1007.8 1012.5 1006.2 993.5 DAY 29 1 23 23 29 27 9 7 5 9 10 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1015.0 1014.4 1012.0 1006.9 1002.7 996.3 993.9 995.9 1001.8 1009.7 1013.9 1016.8 1006.6 MAX. QFE PRESSURE IN HPA 1019.3 1020.9 1022.2 1010.0 1009.2 1000.1 998.3 1001.0 1007.0 1014.6 1017.4 1022.8 1022.8 DAY 24 28 9 5 12 9 3 30 22 21 17 31 MIN. QFE PRESSURE IN HPA 1010.5 1006.7 1003.1 1002.1 997.4 992.2 990.6 991.1 996.0 1005.0 1008.4 1002.5 990.6 DAY 2 15 23 19 29 27 9 6 5 8 10 18 MEAN QNH PRESSURE IN HPA 1018.9 1018.3 1015.9 1010.8 1006.5 1000.2 997.7 999.8 1005.6 1013.6 1017.8 1020.7 1010.5 MAX. QNH PRESSURE IN HPA 1023.2 1024.8 1026.1 1013.9 1013.1 1004.0 1002.1 1004.9 1010.9 1018.5 1021.3 1026.7 1026.7 DAY 24 28 9 5 12 9 3 30 22 21 17 31 MIN. QNH PRESSURE IN HPA 1014.4 1010.6 1007.0 1006.0 1001.2 996.0 994.4 994.9 999.8 1008.9 1012.3 1006.4 994.4 DAY 2 15 23 19 29 27 9 6 5 8 10 18 MEAN QFF PRESSURE IN HPA 1019.2 1018.7 1016.1 1010.9 1006.6 1000.2 997.7 999.7 1005.7 1013.7 1018.0 1021.0 1010.6 MAX. QFF PRESSURE IN HPA 1023.6 1025.2 1026.5 1014.1 1013.2 1004.0 1002.1 1004.8 1010.9 1018.7 1021.6 1027.1 1027.1 DAY 24 28 9 5 12 9 3 30 22 21 17 31 MIN. QFF PRESSURE IN HPA 1014.7 1010.9 1007.1 1006.1 1001.3 996.0 994.4 994.9 999.9 1009.0 1012.5 1006.6 994.4 DAY 2 15 23 19 29 27 9 6 5 8 10 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1015.0 1014.7 1012.2 1007.3 1003.1 996.9 994.5 996.3 1002.0 1009.8 1013.9 1016.8 1006.9 MAX. QFE PRESSURE IN HPA 1019.3 1021.5 1022.0 1010.0 1008.0 1001.0 998.5 1001.0 1007.1 1015.2 1017.2 1022.8 1022.8 DAY 24 28 9 6 12 8 2 30 29 21 17 31 MIN. QFE PRESSURE IN HPA 1010.1 1006.1 1001.8 1002.8 998.0 992.9 990.9 991.5 996.1 1004.8 1008.0 1004.0 990.9 DAY 31 25 23 19 29 27 9 6 5 9 10 18 MEAN QNH PRESSURE IN HPA 1018.9 1018.6 1016.1 1011.2 1006.9 1000.8 998.3 1000.1 1005.8 1013.7 1017.8 1020.7 1010.7 MAX. QNH PRESSURE IN HPA 1023.2 1025.4 1025.9 1013.9 1011.9 1004.9 1002.3 1004.9 1011.0 1019.1 1021.1 1026.7 1026.7 DAY 24 28 9 6 12 8 2 30 29 21 17 31 MIN. QNH PRESSURE IN HPA 1014.0 1010.0 1005.7 1006.7 1001.8 996.7 994.7 995.3 999.9 1008.7 1011.9 1007.9 994.7 DAY 31 25 23 19 29 27 9 6 5 9 10 18 MEAN QFF PRESSURE IN HPA 1019.1 1018.9 1016.3 1011.3 1007.0 1000.8 998.3 1000.1 1005.8 1013.8 1018.0 1021.0 1010.9 MAX. QFF PRESSURE IN HPA 1023.5 1025.8 1026.3 1014.0 1012.0 1004.9 1002.3 1004.8 1011.0 1019.3 1021.3 1027.1 1027.1 DAY 24 28 9 6 12 8 2 30 29 21 17 31 MIN. QFF PRESSURE IN HPA 1014.2 1010.2 1005.7 1006.7 1001.8 996.7 994.7 995.3 999.9 1008.8 1012.0 1008.1 994.7 DAY 31 25 23 19 29 27 9 6 5 9 10 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.2 14.1 17.8 24.2 31.7 34.2 37.7 36.7 33.6 28.7 18.1 12.2 25.1 MINIMUN AIR TEMPERATURE (C) 6.5 9.0 12.0 18.1 23.3 23.9 28.0 28.4 24.5 20.1 12.6 7.7 17.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 5 23 27 31 31 29 18 0 0 164 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) 0.0 4.4 6.6 13.0 17.2 18.6 24.0 26.2 21.0 12.0 6.0 3.0 0.0 DAY 24 3 4 10 6 23 1 5 12 27 16 4 MAXIMUM AIR TEMPERATURE (C) 19.1 19.9 24.1 30.6 39.8 43.7 47.3 45.7 43.3 37.9 24.4 17.5 32.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 18 31 30 31 31 30 30 4 0 207 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.6 26.8 32.2 35.4 46.4 46.4 50.0 50.0 45.2 42.6 34.0 22.2 50.0 DAY 13 24 31 24 29 25 18 2 8 3 1 28 DIF. BETWEEN (MAX.-MIN.) (C) 12.6 10.9 12.1 12.5 16.5 19.8 19.3 17.3 18.8 17.8 11.8 9.8 15.0 MEAN DAILY TEMP. (MDT) (C) 12.8 14.5 18.1 24.4 31.6 33.8 37.6 37.1 33.9 29.0 18.5 12.6 25.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 6.0 104.1 327.9 383.4 516.1 498.4 374.1 247.3 20.1 0.0 2477.4 HEATING DEG. DAYS(BASE 18 0C) 161.3 99.0 28.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 39.9 169.4 497.8 DEWPOINT (MEAN C) 4.5 8.6 10.2 15.7 11.5 10.5 16.1 19.2 14.6 14.1 10.3 8.2 12.0 MIXING RATIO (G/KG) 5.45 7.06 7.93 11.36 8.97 8.55 12.29 15.16 11.14 10.64 8.16 6.91 9.47 VAPOUR PRESSURE (HPA) 8.82 11.38 12.72 18.06 14.25 13.49 19.24 23.66 17.62 16.95 13.10 11.17 15.04 SATURATION DEF. (HPA) 6.00 5.15 8.41 13.25 35.33 43.59 49.94 41.01 37.42 25.09 8.78 3.44 23.12 RELATIVE HUMIDITY (MEAN %) 62 72 64 62 33 26 31 41 37 44 63 78 51 RELATIVE HUMIDITY (MAX. %) 80 89 84 81 51 41 48 66 60 66 81 92 70 RELATIVE HUMIDITY (MIN. %) 40 50 40 43 19 14 17 20 16 26 43 59 32 RELATIVE HUMIDITY (MEAN% 03UTC) 77 86 80 77 46 39 45 61 56 62 74 88 66 RELATIVE HUMIDITY (MEAN% 09UTC) 48 62 50 48 22 19 21 28 23 32 52 67 39 RELATIVE HUMIDITY (MEAN% 15UTC) 56 62 52 49 25 19 22 25 22 35 58 76 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.0 80.8 72.3 59.0 6.0 0.0 0.0 0.0 0.0 1.0 105.9 83.8 410.8 DAYS WITH PRECIPITATION >=10 0 4 2 1 0 0 0 0 0 0 5 1 13 DAYS WITH PRECIPITATION >= 5 0 5 2 3 1 0 0 0 0 0 6 2 19 DAYS WITH PRECIPITATION >= 1 0 9 8 5 1 0 0 0 0 1 7 3 34 DAYS WITH PRECIPITATION 5 11 10 9 3 0 0 0 0 1 11 6 56 GREATEST DAILY PRECIPITATION 1.0 25.1 43.0 39.0 5.3 0.0 0.0 0.0 0.0 1.0 27.8 73.0 73.0 DAY 30 18 7 10 4 ** ** ** ** 22 29 20 DAY WITH THUNDER STORM 1 8 5 7 0 0 0 2 0 0 9 3 35 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 6 1 5 5 20 15 24 25 16 16 6 4 143 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 180 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 9.0 7.9 10.0 9.6 11.2 12.5 11.8 10.3 8.7 9.8 10.2 8.5 10.4 PREVAILING WIND PERCENT 23.8 22.3 21.8 20.8 31.9 58.8 26.7 25.0 14.2 21.0 25.8 26.5 25.2 CALMS PERCENT OF WIND 52.4 39.3 35.9 37.5 21.0 17.5 22.1 25.8 34.6 37.9 40.8 47.8 34.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 240 248 240 248 240 245 2909 VECTOR WIND DIRECTION (MEAN) 305 217 230 299 324 316 272 209 231 300 329 277 286 VECTOR WIND MAGNITUDE(KNOTS) 1.8 0.9 1.0 1.5 3.1 8.7 4.5 4.0 1.8 1.4 0.9 0.8 1.9 WIND STEADINESES (MEAN %) 43.9 15.5 14.9 25.0 33.3 89.7 52.9 51.9 31.0 24.6 13.6 15.7 27.9 WIND SPEED (MEAN KNOTS) 4.1 5.8 6.7 6.0 9.3 9.7 8.5 7.7 5.8 5.7 6.6 5.1 6.8 FASTEST WIND DIRECTION 160 150 180 170 10 300 330 340 60 330 180 150 180 FASTEST WIND SPEED (KNOTS) 27 39 49 43 33 39 35 29 31 29 43 41 49 DAY 15 14 15 10 26 19 27 25 6 16 8 28 DAYS WITH SKY CLEAR (0-2)/8 19 12 14 9 11 28 29 31 30 27 11 20 241 DAYS WITH P.CLOUDY (3-6)/8 7 11 10 9 16 2 2 0 0 4 10 4 75 DAYS WITH CLOUDY (7-8)/8 5 5 7 12 4 0 0 0 0 0 9 7 49 DAYS WITH VISIBILITY =< 2 KM 3 5 1 1 0 2 0 3 3 2 2 4 26 DURATION OF SUNSHINE HOURS 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ****** 0.0 0.0 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.9 1013.9 1010.6 1007.5 1004.3 996.9 995.1 997.0 1003.9 1009.4 1013.8 1017.7 1007.3 MAX. QFE PRESSURE IN HPA 1024.0 1020.8 1017.5 1014.0 1010.4 1006.4 1000.1 1003.0 1011.0 1016.0 1021.1 1023.8 1024.0 DAY-HOUR 1- 6 22- 6 4- 6 15- 6 6- 6 2- 6 31- 6 29- 6 23- 6 21- 6 15- 6 22- 6 MIN. QFE PRESSURE IN HPA 1008.2 1007.2 1000.0 1001.4 998.3 990.8 988.7 990.7 997.6 1002.3 1003.6 1008.7 988.7 DAY-HOUR 12-12 14-12 15-12 19- 0 29-15 24-15 19-15 5-15 5-15 1- 3 8-12 1-15 MEAN QNH PRESSURE IN HPA 1020.8 1017.8 1014.5 1011.4 1008.1 1000.7 999.0 1000.9 1007.8 1013.3 1017.7 1021.6 1011.1 MAX. QNH PRESSURE IN HPA 1027.9 1024.7 1021.4 1017.9 1014.3 1010.3 1004.0 1006.9 1014.9 1019.9 1025.0 1027.7 1027.9 DAY-HOUR 1- 6 22- 6 4- 6 15- 6 6- 6 2- 6 31- 6 29- 6 23- 6 21- 6 15- 6 22- 6 MIN. QNH PRESSURE IN HPA 1012.1 1011.1 1003.9 1005.3 1002.1 994.6 992.5 994.5 1001.4 1006.2 1007.5 1012.6 992.5 DAY-HOUR 12-12 14-12 15-12 19- 0 29-15 24-15 19-15 5-15 5-15 1- 3 8-12 1-15 MEAN QFF PRESSURE IN HPA 1021.1 1018.1 1014.8 1011.5 1008.2 1000.7 999.0 1000.8 1007.8 1013.4 1017.9 1021.8 1011.3 MAX. QFF PRESSURE IN HPA 1028.3 1025.0 1021.7 1018.1 1014.4 1010.3 1003.9 1006.9 1014.9 1020.0 1025.4 1028.1 1028.3 DAY-HOUR 1- 6 22- 6 4- 6 15- 6 6- 6 2- 6 31- 6 29- 6 23- 6 21- 6 15- 6 22- 6 MIN. QFF PRESSURE IN HPA 1012.4 1011.3 1004.0 1005.4 1002.2 994.6 992.4 994.5 1001.5 1006.2 1007.6 1012.8 992.4 DAY-HOUR 12-12 14-12 15-12 19- 0 29-15 24-15 19-15 5-15 5-15 1- 3 8-12 1-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1013.8 1010.5 1007.0 1004.1 997.0 995.0 997.0 1003.8 1009.0 1013.7 1017.3 1007.1 MAX. QFE PRESSURE IN HPA 1022.2 1018.8 1015.8 1011.6 1009.4 1004.5 998.6 1001.1 1008.3 1013.4 1019.4 1023.5 1023.5 DAY 1 22 28 12 7 2 3 25 23 21 15 23 MIN. QFE PRESSURE IN HPA 1009.2 1008.0 1005.6 1001.4 999.4 992.2 989.4 992.8 998.7 1003.0 1005.4 1008.8 989.4 DAY 20 25 15 19 29 25 19 6 6 1 8 1 MEAN QNH PRESSURE IN HPA 1020.7 1017.7 1014.4 1010.9 1008.0 1000.8 998.9 1000.8 1007.6 1012.8 1017.6 1021.2 1011.0 MAX. QNH PRESSURE IN HPA 1026.1 1022.7 1019.7 1015.5 1013.3 1008.4 1002.4 1005.0 1012.2 1017.3 1023.3 1027.4 1027.4 DAY 1 22 28 12 7 2 3 25 23 21 15 23 MIN. QNH PRESSURE IN HPA 1013.1 1011.9 1009.5 1005.3 1003.3 996.0 993.2 996.6 1002.6 1006.9 1009.3 1012.7 993.2 DAY 20 25 15 19 29 25 19 6 6 1 8 1 MEAN QFF PRESSURE IN HPA 1021.0 1018.0 1014.7 1011.0 1008.0 1000.8 998.8 1000.8 1007.6 1012.9 1017.9 1021.5 1011.1 MAX. QFF PRESSURE IN HPA 1026.5 1023.0 1019.9 1015.7 1013.4 1008.4 1002.4 1004.9 1012.2 1017.3 1023.6 1027.8 1027.8 DAY 1 22 28 12 7 2 3 25 23 21 15 23 MIN. QFF PRESSURE IN HPA 1013.4 1012.1 1009.6 1005.4 1003.2 996.0 993.1 996.6 1002.5 1006.9 1009.4 1012.9 993.1 DAY 20 25 15 19 29 29 19 6 6 2 8 1 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1013.9 1010.5 1007.6 1004.6 997.2 995.4 997.5 1004.2 1009.5 1014.0 1017.2 1007.4 MAX. QFE PRESSURE IN HPA 1023.0 1019.0 1016.3 1012.9 1009.6 1004.9 999.1 1002.8 1009.3 1014.3 1019.4 1022.0 1023.0 DAY 1 22 4 5 6 2 31 29 23 21 15 4 MIN. QFE PRESSURE IN HPA 1010.9 1010.2 1003.0 1003.4 999.9 991.7 990.0 993.0 999.4 1002.3 1005.8 1009.6 990.0 DAY 12 6 15 19 29 25 19 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1021.0 1017.8 1014.4 1011.5 1008.4 1001.1 999.2 1001.3 1008.0 1013.4 1017.9 1021.2 1011.3 MAX. QNH PRESSURE IN HPA 1026.9 1022.9 1020.2 1016.8 1013.5 1008.8 1003.0 1006.7 1013.2 1018.2 1023.3 1025.9 1026.9 DAY 1 22 4 5 6 2 31 29 23 21 15 4 MIN. QNH PRESSURE IN HPA 1014.8 1014.1 1006.9 1007.3 1003.8 995.5 993.8 996.8 1003.3 1006.2 1009.7 1013.5 993.8 DAY 12 6 15 19 29 25 19 5 5 1 8 1 MEAN QFF PRESSURE IN HPA 1021.3 1018.1 1014.7 1011.6 1008.5 1001.1 999.2 1001.3 1008.1 1013.5 1018.1 1021.5 1011.4 MAX. QFF PRESSURE IN HPA 1027.3 1023.2 1020.5 1016.9 1013.6 1008.8 1002.9 1006.7 1013.2 1018.3 1023.7 1026.3 1027.3 DAY 1 22 4 5 6 2 31 29 23 26 16 4 MIN. QFF PRESSURE IN HPA 1015.1 1014.3 1007.1 1007.3 1003.7 995.5 993.8 996.8 1003.3 1006.2 1009.8 1013.7 993.8 DAY 12 6 15 25 29 25 19 5 5 1 8 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.4 1015.4 1011.8 1008.8 1005.3 997.9 996.2 998.3 1005.5 1011.0 1015.2 1018.7 1008.5 MAX. QFE PRESSURE IN HPA 1024.0 1020.8 1017.5 1014.0 1010.4 1006.4 1000.1 1003.0 1011.0 1016.0 1021.1 1023.8 1024.0 DAY 1 22 4 15 6 2 31 29 23 21 15 22 MIN. QFE PRESSURE IN HPA 1011.4 1011.2 1003.2 1005.5 999.9 992.8 991.2 993.0 1000.1 1004.1 1006.2 1010.9 991.2 DAY 12 25 15 26 29 25 19 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1022.4 1019.3 1015.7 1012.7 1009.2 1001.7 1000.1 1002.1 1009.4 1014.9 1019.1 1022.6 1012.4 MAX. QNH PRESSURE IN HPA 1027.9 1024.7 1021.4 1017.9 1014.3 1010.3 1004.0 1006.9 1014.9 1019.9 1025.0 1027.7 1027.9 DAY 1 22 4 15 6 2 31 29 23 21 15 22 MIN. QNH PRESSURE IN HPA 1015.3 1015.1 1007.1 1009.4 1003.8 996.6 995.0 996.8 1004.0 1008.0 1010.1 1014.8 995.0 DAY 12 25 15 26 29 25 19 5 5 1 8 1 MEAN QFF PRESSURE IN HPA 1022.7 1019.6 1015.9 1012.8 1009.2 1001.7 1000.3 1002.1 1009.4 1015.0 1019.3 1022.8 1012.6 MAX. QFF PRESSURE IN HPA 1028.3 1025.0 1021.7 1018.1 1014.4 1010.3 1003.9 1006.9 1014.9 1020.0 1025.4 1028.1 1028.3 DAY 1 22 4 15 6 2 31 29 23 21 15 22 MIN. QFF PRESSURE IN HPA 1015.6 1015.4 1007.3 1009.5 1003.7 996.6 995.0 996.8 1003.9 1008.0 1010.2 1015.0 995.0 DAY 12 25 15 26 29 25 19 5 5 1 8 1 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1014.7 1011.4 1008.4 1004.9 997.5 995.7 997.7 1004.8 1010.2 1014.2 1018.1 1007.9 MAX. QFE PRESSURE IN HPA 1023.0 1019.9 1017.1 1013.7 1010.0 1005.9 999.1 1002.5 1009.9 1015.2 1020.3 1023.2 1023.2 DAY 1 22 3 12 6 2 31 29 23 20 15 22 MIN. QFE PRESSURE IN HPA 1010.0 1009.9 1001.3 1003.9 999.2 992.4 991.1 992.5 999.3 1004.2 1004.6 1011.2 991.1 DAY 12 18 15 2 29 27 19 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1021.4 1018.6 1015.3 1012.3 1008.8 1001.3 999.5 1001.6 1008.7 1014.1 1018.1 1022.0 1011.8 MAX. QNH PRESSURE IN HPA 1026.9 1023.8 1021.0 1017.6 1013.9 1009.8 1003.0 1006.4 1013.8 1019.1 1024.2 1027.1 1027.1 DAY 1 22 3 12 6 2 31 29 23 20 15 22 MIN. QNH PRESSURE IN HPA 1013.9 1013.8 1005.2 1007.8 1003.1 996.2 994.9 996.3 1003.2 1008.1 1008.5 1015.1 994.9 DAY 12 18 15 2 29 27 19 5 5 1 8 1 MEAN QFF PRESSURE IN HPA 1021.7 1018.9 1015.5 1012.4 1008.8 1001.3 999.6 1001.5 1008.7 1014.1 1018.3 1022.2 1011.9 MAX. QFF PRESSURE IN HPA 1027.3 1024.1 1021.2 1017.8 1014.0 1009.8 1002.9 1006.3 1013.8 1019.2 1024.5 1027.5 1027.5 DAY 1 22 3 12 6 2 31 29 23 20 15 22 MIN. QFF PRESSURE IN HPA 1014.2 1014.1 1005.3 1007.9 1003.0 996.2 994.8 996.3 1003.1 1008.1 1008.6 1015.3 994.8 DAY 12 18 15 2 29 27 19 5 5 1 8 1 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.7 1012.9 1009.8 1007.2 1003.5 996.2 994.3 996.1 1002.8 1008.5 1012.8 1016.7 1006.4 MAX. QFE PRESSURE IN HPA 1021.0 1017.8 1015.5 1013.0 1008.6 1005.0 997.4 1000.5 1007.5 1013.5 1019.0 1022.6 1022.6 DAY 1 21 3 5 6 2 3 29 22 21 15 22 MIN. QFE PRESSURE IN HPA 1008.2 1007.2 1000.0 1003.6 998.8 991.3 989.5 991.3 997.7 1003.0 1003.6 1008.8 989.5 DAY 12 14 15 18 29 24 19 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1019.6 1016.8 1013.7 1011.1 1007.4 1000.0 998.1 999.9 1006.7 1012.4 1016.7 1020.6 1010.3 MAX. QNH PRESSURE IN HPA 1024.9 1021.7 1019.4 1016.9 1012.5 1008.9 1001.2 1004.4 1011.4 1017.4 1022.9 1026.5 1026.5 DAY 1 21 3 5 6 2 3 29 22 21 15 22 MIN. QNH PRESSURE IN HPA 1012.1 1011.1 1003.9 1007.5 1002.7 995.1 993.3 995.1 1001.5 1006.9 1007.5 1012.7 993.3 DAY 12 14 15 18 29 24 19 5 5 1 8 1 MEAN QFF PRESSURE IN HPA 1019.9 1017.1 1013.9 1011.2 1007.4 1000.0 998.2 999.9 1006.7 1012.5 1016.9 1020.8 1010.4 MAX. QFF PRESSURE IN HPA 1025.3 1022.0 1019.6 1017.0 1012.6 1008.9 1001.2 1004.3 1011.4 1017.5 1023.2 1026.8 1026.8 DAY 1 21 3 5 6 2 3 29 22 21 15 22 MIN. QFF PRESSURE IN HPA 1012.4 1011.3 1004.0 1007.6 1002.6 995.1 993.2 995.1 1001.5 1006.9 1007.6 1012.9 993.2 DAY 12 14 15 18 29 24 19 5 5 1 8 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.1 1013.1 1009.7 1006.5 1003.1 995.6 993.7 995.7 1002.5 1008.6 1013.0 1017.2 1006.2 MAX. QFE PRESSURE IN HPA 1021.1 1017.7 1015.5 1011.6 1008.4 1004.1 997.0 999.9 1007.0 1013.3 1019.4 1022.2 1022.2 DAY 21 21 3 12 6 2 30 29 22 21 15 21 MIN. QFE PRESSURE IN HPA 1008.7 1008.2 1000.3 1002.8 998.3 990.8 988.7 990.7 997.6 1002.6 1004.2 1008.7 988.7 DAY 19 14 15 18 29 24 19 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1020.0 1017.0 1013.6 1010.4 1007.0 999.4 997.5 999.5 1006.4 1012.4 1016.9 1021.2 1010.1 MAX. QNH PRESSURE IN HPA 1025.0 1021.6 1019.4 1015.5 1012.3 1008.0 1000.8 1003.8 1010.9 1017.2 1023.3 1026.1 1026.1 DAY 21 21 3 12 6 2 30 29 22 21 15 21 MIN. QNH PRESSURE IN HPA 1012.6 1012.1 1004.2 1006.7 1002.1 994.6 992.5 994.5 1001.4 1006.5 1008.1 1012.6 992.5 DAY 19 14 15 18 29 24 19 5 5 1 8 1 MEAN QFF PRESSURE IN HPA 1020.3 1017.3 1013.8 1010.6 1007.1 999.5 997.5 999.5 1006.4 1012.5 1017.1 1021.5 1010.3 MAX. QFF PRESSURE IN HPA 1025.4 1021.9 1019.7 1015.7 1012.4 1008.0 1000.8 1003.8 1010.9 1017.3 1023.6 1026.5 1026.5 DAY 21 21 3 12 6 2 30 29 22 21 15 21 MIN. QFF PRESSURE IN HPA 1012.9 1012.3 1004.4 1006.8 1002.2 994.6 992.4 994.5 1001.5 1006.5 1008.2 1012.8 992.4 DAY 19 14 15 18 29 24 19 5 5 1 8 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.0 1013.9 1010.7 1007.3 1004.2 996.7 995.2 996.9 1003.7 1009.4 1013.8 1018.1 1007.2 MAX. QFE PRESSURE IN HPA 1022.3 1019.1 1016.8 1012.8 1009.4 1005.2 998.4 1002.5 1008.3 1014.3 1019.5 1023.2 1023.2 DAY 21 21 3 14 6 2 31 28 22 20 15 21 MIN. QFE PRESSURE IN HPA 1009.7 1009.0 1002.2 1002.6 999.2 991.6 990.7 992.0 999.0 1003.3 1006.0 1009.9 990.7 DAY 19 9 15 18 28 24 18 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1020.9 1017.8 1014.6 1011.2 1008.1 1000.5 999.1 1000.7 1007.6 1013.3 1017.7 1022.0 1011.1 MAX. QNH PRESSURE IN HPA 1026.2 1023.0 1020.7 1016.7 1013.3 1009.1 1002.2 1006.4 1012.2 1018.2 1023.4 1027.1 1027.1 DAY 21 21 3 14 6 2 31 28 22 20 15 21 MIN. QNH PRESSURE IN HPA 1013.6 1012.9 1006.1 1006.5 1003.1 995.4 994.5 995.8 1002.9 1007.2 1009.9 1013.8 994.5 DAY 19 9 15 18 28 24 18 5 5 1 8 1 MEAN QFF PRESSURE IN HPA 1021.2 1018.1 1014.8 1011.3 1008.1 1000.5 999.0 1000.7 1007.6 1013.4 1017.9 1022.3 1011.3 MAX. QFF PRESSURE IN HPA 1026.7 1023.3 1021.0 1016.9 1013.4 1009.1 1002.2 1006.4 1012.2 1018.3 1023.7 1027.5 1027.5 DAY 21 21 3 14 6 2 31 28 22 20 15 21 MIN. QFF PRESSURE IN HPA 1013.9 1013.2 1006.3 1006.6 1003.0 995.4 994.5 995.8 1002.8 1007.2 1010.0 1014.0 994.5 DAY 19 9 15 18 28 24 18 5 5 1 8 1 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1013.8 1010.9 1007.4 1004.5 997.1 995.7 997.3 1004.0 1009.5 1013.7 1018.1 1007.4 MAX. QFE PRESSURE IN HPA 1022.2 1019.1 1016.6 1012.3 1009.8 1005.0 999.5 1001.6 1009.4 1014.0 1018.9 1023.5 1023.5 DAY 21 21 3 14 5 1 31 28 22 20 14 31 MIN. QFE PRESSURE IN HPA 1010.2 1008.2 1004.9 1002.1 999.6 992.0 990.9 992.4 998.9 1003.4 1006.6 1009.0 990.9 DAY 19 9 7 18 27 24 19 5 5 1 7 1 MEAN QNH PRESSURE IN HPA 1020.7 1017.7 1014.7 1011.3 1008.4 1001.0 999.5 1001.2 1007.9 1013.4 1017.6 1022.0 1011.3 MAX. QNH PRESSURE IN HPA 1026.1 1023.0 1020.5 1016.2 1013.7 1008.9 1003.4 1005.5 1013.3 1017.9 1022.8 1027.4 1027.4 DAY 21 21 3 14 5 1 31 28 22 20 14 31 MIN. QNH PRESSURE IN HPA 1014.1 1012.1 1008.8 1006.0 1003.5 995.8 994.7 996.2 1002.8 1007.3 1010.5 1012.9 994.7 DAY 19 9 7 18 27 24 19 5 5 1 7 1 MEAN QFF PRESSURE IN HPA 1021.1 1018.0 1015.0 1011.4 1008.4 1001.0 999.5 1001.1 1007.9 1013.5 1017.8 1022.3 1011.4 MAX. QFF PRESSURE IN HPA 1026.5 1023.3 1020.8 1016.3 1013.8 1008.9 1003.3 1005.4 1013.3 1018.0 1023.1 1027.8 1027.8 DAY 21 21 3 14 5 1 31 28 22 20 14 31 MIN. QFF PRESSURE IN HPA 1014.4 1012.3 1009.0 1006.1 1003.4 995.8 994.6 996.2 1002.7 1007.3 1010.6 1013.1 994.6 DAY 19 9 7 18 27 24 19 5 5 1 7 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.3 15.7 17.4 24.7 33.4 35.4 37.4 36.3 32.5 26.1 19.1 13.7 25.3 MINIMUN AIR TEMPERATURE (C) 7.1 9.6 12.5 16.4 23.9 25.2 27.3 27.0 23.2 19.4 12.0 9.0 17.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 7 27 29 31 29 24 9 0 0 156 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) 3.2 5.8 6.0 10.6 19.0 20.0 24.8 20.0 19.0 13.0 6.0 1.0 1.0 DAY 29 14 22 1 10 6 11 28 22 10 29 30 MAXIMUM AIR TEMPERATURE (C) 19.0 23.1 23.0 32.4 41.9 44.9 47.3 45.7 42.7 33.9 28.3 20.3 33.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 21 31 30 31 31 30 25 15 0 215 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.4 28.6 31.2 43.0 44.6 49.0 50.2 51.0 47.0 41.0 33.0 26.0 51.0 DAY 23 28 11 30 15 29 19 13 6 1 14 19 DIF. BETWEEN (MAX.-MIN.) (C) 11.9 13.5 10.5 16.0 18.0 19.7 20.0 18.7 19.5 14.5 16.3 11.3 15.8 MEAN DAILY TEMP. (MDT) (C) 13.1 16.4 17.7 24.4 32.9 35.1 37.3 36.4 33.0 26.7 20.1 14.7 25.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 5.7 118.9 368.4 422.1 505.4 477.0 358.5 177.8 24.3 0.0 2458.3 HEATING DEG. DAYS(BASE 18 0C) 154.6 50.4 39.2 0.9 0.0 0.0 0.0 0.0 0.0 0.0 12.1 109.2 366.3 DEWPOINT (MEAN C) 6.9 7.5 9.8 6.7 8.7 12.0 11.7 17.1 12.8 13.5 6.4 7.1 10.0 MIXING RATIO (G/KG) 6.24 6.56 7.82 6.32 7.23 9.31 9.18 13.74 9.78 10.11 6.22 6.69 8.27 VAPOUR PRESSURE (HPA) 10.11 10.58 12.54 10.14 11.54 14.71 14.45 21.43 15.49 16.13 10.03 10.81 13.16 SATURATION DEF. (HPA) 4.79 8.06 7.98 23.24 42.84 46.36 53.76 42.81 36.63 19.61 13.52 5.67 25.44 RELATIVE HUMIDITY (MEAN %) 72 62 64 36 25 27 24 37 34 50 47 70 46 RELATIVE HUMIDITY (MAX. %) 89 82 84 57 42 44 39 58 54 68 67 86 64 RELATIVE HUMIDITY (MIN. %) 47 36 41 19 12 14 12 19 17 33 24 48 27 RELATIVE HUMIDITY (MEAN% 03UTC) 86 75 79 54 38 40 36 52 50 60 64 79 59 RELATIVE HUMIDITY (MEAN% 09UTC) 60 47 52 22 15 18 16 27 22 40 31 54 34 RELATIVE HUMIDITY (MEAN% 15UTC) 67 52 55 24 16 19 17 24 23 46 39 68 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 7.4 22.1 103.1 3.4 0.0 0.0 0.1 0.0 0.0 35.3 0.0 66.4 237.8 DAYS WITH PRECIPITATION >=10 0 0 2 0 0 0 0 0 0 1 0 4 7 DAYS WITH PRECIPITATION >= 5 1 3 5 0 0 0 0 0 0 3 0 6 18 DAYS WITH PRECIPITATION >= 1 1 5 11 1 0 0 0 0 0 4 0 6 28 DAYS WITH PRECIPITATION 4 6 13 5 0 0 1 0 0 7 0 8 44 GREATEST DAILY PRECIPITATION 7.0 6.0 55.0 3.0 0.0 0.0 0.1 0.0 0.0 23.0 0.0 18.0 55.0 DAY 6 10 4 5 ** ** 30 ** ** 26 ** 6 DAY WITH THUNDER STORM 4 6 9 1 0 0 2 0 0 4 1 4 31 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 8 3 13 18 23 29 30 16 21 12 7 7 187 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 7.3 7.3 9.6 10.6 11.6 12.4 11.0 11.0 9.0 8.2 9.5 9.0 10.0 PREVAILING WIND PERCENT 25.0 18.3 21.0 30.8 32.3 43.8 30.2 29.0 21.3 20.2 38.3 33.5 28.7 CALMS PERCENT OF WIND 48.8 45.1 27.8 22.9 21.0 14.6 25.0 27.4 42.1 24.6 33.8 28.6 30.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 247 167 247 306 305 303 291 278 272 222 320 289 292 VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.5 0.6 2.6 4.4 5.5 4.1 3.5 2.0 0.7 3.8 0.7 2.2 WIND STEADINESES (MEAN %) 14.6 27.8 7.7 32.1 51.2 55.6 50.6 50.0 38.5 10.4 65.5 10.1 31.4 WIND SPEED (MEAN KNOTS) 4.8 5.4 7.8 8.1 8.6 9.9 8.1 7.0 5.2 6.7 5.8 6.9 7.0 FASTEST WIND DIRECTION 150 150 220 190 350 340 320 70 180 350 180 160 220 FASTEST WIND SPEED (KNOTS) 35 39 49 31 39 35 35 27 23 39 21 33 49 DAY 6 9 4 19 12 5 2 7 19 19 7 24 DAYS WITH SKY CLEAR (0-2)/8 22 18 10 14 14 30 29 30 30 13 25 15 250 DAYS WITH P.CLOUDY (3-6)/8 6 7 11 9 14 0 1 1 0 9 4 10 72 DAYS WITH CLOUDY (7-8)/8 3 3 10 7 3 0 1 0 0 9 1 6 43 DAYS WITH VISIBILITY =< 2 KM 4 2 3 1 1 10 5 5 3 4 1 5 44 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 185.9 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.9 1014.9 1010.7 1009.9 1004.2 998.9 995.8 996.6 1002.7 1009.8 1014.1 1017.4 1007.8 MAX. QFE PRESSURE IN HPA 1024.7 1020.7 1016.7 1018.1 1010.5 1004.8 1002.2 1001.9 1010.3 1017.3 1019.8 1023.2 1024.7 DAY-HOUR 28- 6 1- 0 15- 6 22- 6 12- 9 1- 6 29-21 7- 6 30- 6 30- 6 30- 6 2- 6 MIN. QFE PRESSURE IN HPA 1008.4 1007.3 1002.8 1002.8 998.4 993.3 990.0 990.5 996.9 1002.5 1008.7 1009.0 990.0 DAY-HOUR 6-12 28-15 13-21 25-15 29-15 8-15 26-15 13-15 10-12 4-12 25-12 23-21 MEAN QNH PRESSURE IN HPA 1022.8 1018.8 1014.6 1013.8 1008.0 1002.7 999.6 1000.4 1006.5 1013.6 1018.0 1021.4 1011.7 MAX. QNH PRESSURE IN HPA 1028.6 1024.6 1020.6 1022.0 1014.4 1008.7 1006.1 1005.8 1014.2 1021.2 1023.7 1027.1 1028.6 DAY-HOUR 28- 6 1- 0 15- 6 22- 6 12- 9 1- 6 29-21 7- 6 30- 6 30- 6 30- 6 2- 6 MIN. QNH PRESSURE IN HPA 1012.3 1011.2 1006.7 1006.7 1002.2 997.1 993.8 994.3 1000.7 1006.4 1012.6 1012.9 993.8 DAY-HOUR 6-12 28-15 13-21 25-15 29-15 8-15 26-15 13-15 10-12 4-12 25-12 23-21 MEAN QFF PRESSURE IN HPA 1023.2 1019.1 1014.8 1013.9 1008.1 1002.7 999.6 1000.4 1006.6 1013.8 1018.3 1021.7 1011.8 MAX. QFF PRESSURE IN HPA 1029.0 1024.9 1021.0 1022.2 1014.4 1008.7 1006.0 1005.7 1014.3 1021.4 1024.0 1027.5 1029.0 DAY-HOUR 28- 6 1- 0 15- 6 22- 6 12- 9 1- 6 29-21 7- 6 30- 6 30- 6 30- 6 2- 6 MIN. QFF PRESSURE IN HPA 1012.6 1011.4 1006.8 1006.8 1002.3 997.1 993.8 994.3 1000.8 1006.4 1012.8 1013.1 993.8 DAY-HOUR 6-12 28-15 13-21 25-15 29-15 8-15 26-15 13-15 10-12 4-12 25-12 23-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1014.7 1010.4 1009.9 1003.9 998.9 995.6 996.3 1002.4 1009.2 1013.7 1017.4 1007.6 MAX. QFE PRESSURE IN HPA 1023.2 1020.7 1014.4 1017.4 1007.5 1002.3 999.4 1001.1 1007.8 1014.9 1017.7 1021.6 1023.2 DAY 29 1 2 22 12 1 30 8 30 28 30 2 MIN. QFE PRESSURE IN HPA 1013.9 1007.8 1004.3 1003.6 999.3 994.7 991.5 991.5 997.9 1002.7 1009.6 1009.2 991.5 DAY 6 18 14 4 30 9 27 14 11 4 3 24 MEAN QNH PRESSURE IN HPA 1022.7 1018.6 1014.2 1013.8 1007.8 1002.8 999.5 1000.2 1006.2 1013.1 1017.6 1021.3 1011.5 MAX. QNH PRESSURE IN HPA 1027.1 1024.6 1018.3 1021.3 1011.4 1006.2 1003.3 1005.0 1011.7 1018.8 1021.6 1025.5 1027.1 DAY 29 1 2 22 12 1 30 8 30 28 30 2 MIN. QNH PRESSURE IN HPA 1017.8 1011.7 1008.2 1007.5 1003.2 998.5 995.3 995.3 1001.7 1006.6 1013.5 1013.1 995.3 DAY 6 18 14 4 30 9 27 14 11 4 3 24 MEAN QFF PRESSURE IN HPA 1023.0 1018.9 1014.5 1013.9 1007.8 1002.7 999.4 1000.1 1006.2 1013.2 1017.8 1021.6 1011.6 MAX. QFF PRESSURE IN HPA 1027.5 1024.9 1018.5 1021.5 1011.4 1006.2 1003.2 1004.9 1011.7 1019.0 1021.9 1025.8 1027.5 DAY 29 1 2 22 12 1 30 8 30 28 30 2 MIN. QFF PRESSURE IN HPA 1018.1 1011.9 1008.4 1007.6 1003.1 998.5 995.3 995.2 1001.8 1006.6 1013.6 1013.3 995.2 DAY 6 18 14 4 30 9 27 14 11 4 3 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1014.8 1010.3 1010.1 1004.4 999.3 996.0 997.0 1002.8 1009.7 1014.1 1017.5 1007.9 MAX. QFE PRESSURE IN HPA 1022.6 1019.7 1015.0 1017.4 1009.0 1003.7 999.2 1001.0 1008.5 1014.8 1017.8 1022.2 1022.6 DAY 17 1 15 22 12 1 31 8 30 28 30 2 MIN. QFE PRESSURE IN HPA 1013.5 1008.1 1004.5 1003.0 1000.2 995.1 992.3 993.0 998.0 1003.3 1009.1 1010.8 992.3 DAY 6 18 13 19 30 9 26 14 11 4 7 13 MEAN QNH PRESSURE IN HPA 1022.7 1018.7 1014.2 1013.9 1008.2 1003.2 999.8 1000.9 1006.7 1013.6 1018.0 1021.4 1011.8 MAX. QNH PRESSURE IN HPA 1026.5 1023.6 1018.9 1021.3 1012.9 1007.6 1003.1 1004.9 1012.4 1018.7 1021.7 1026.1 1026.5 DAY 17 1 15 22 12 1 31 8 30 28 30 2 MIN. QNH PRESSURE IN HPA 1017.4 1012.0 1008.4 1006.9 1004.1 998.9 996.1 996.8 1001.8 1007.2 1013.0 1014.7 996.1 DAY 6 18 13 19 30 9 26 14 11 4 7 13 MEAN QFF PRESSURE IN HPA 1023.1 1019.0 1014.5 1014.1 1008.3 1003.2 999.8 1000.8 1006.7 1013.8 1018.2 1021.7 1011.9 MAX. QFF PRESSURE IN HPA 1026.9 1023.9 1019.2 1021.5 1012.9 1007.6 1003.0 1004.8 1012.5 1018.9 1022.0 1026.5 1026.9 DAY 17 1 15 22 12 1 31 8 30 28 30 2 MIN. QFF PRESSURE IN HPA 1017.7 1012.2 1008.6 1006.9 1004.1 999.0 996.1 996.8 1001.9 1007.3 1013.2 1015.0 996.1 DAY 6 18 13 19 30 9 26 14 11 4 7 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1020.3 1016.2 1011.7 1011.3 1005.5 1000.1 996.9 998.0 1004.0 1011.5 1015.5 1019.0 1009.2 MAX. QFE PRESSURE IN HPA 1024.7 1020.5 1016.7 1018.1 1009.8 1004.8 1000.5 1001.9 1010.3 1017.3 1019.8 1023.2 1024.7 DAY 28 1 15 22 13 1 30 7 30 30 30 2 MIN. QFE PRESSURE IN HPA 1013.2 1008.4 1004.7 1004.0 1001.7 996.3 992.7 994.2 998.8 1005.3 1011.2 1014.2 992.7 DAY 6 17 13 19 23 8 27 14 10 4 7 23 MEAN QNH PRESSURE IN HPA 1024.2 1020.1 1015.6 1015.2 1009.4 1003.9 1000.8 1001.9 1007.8 1015.4 1019.4 1022.9 1013.0 MAX. QNH PRESSURE IN HPA 1028.6 1024.4 1020.6 1022.0 1013.7 1008.7 1004.4 1005.8 1014.2 1021.2 1023.7 1027.1 1028.6 DAY 28 1 15 22 13 1 30 7 30 30 30 2 MIN. QNH PRESSURE IN HPA 1017.1 1012.3 1008.6 1007.9 1005.6 1000.1 996.5 998.0 1002.7 1009.2 1015.1 1018.1 996.5 DAY 6 17 13 19 23 8 27 14 10 4 7 23 MEAN QFF PRESSURE IN HPA 1024.5 1020.4 1015.8 1015.3 1009.4 1003.9 1000.7 1001.9 1007.9 1015.5 1019.6 1023.3 1013.2 MAX. QFF PRESSURE IN HPA 1029.0 1024.7 1021.0 1022.2 1013.7 1008.7 1004.3 1005.7 1014.3 1021.4 1024.0 1027.5 1029.0 DAY 28 1 15 22 13 1 30 7 30 30 30 2 MIN. QFF PRESSURE IN HPA 1017.4 1012.5 1008.8 1007.9 1005.6 1000.2 996.5 997.9 1002.7 1009.2 1015.3 1018.3 996.5 DAY 6 17 13 19 23 8 27 14 10 4 7 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1015.9 1011.4 1010.7 1005.1 999.5 996.6 997.4 1003.4 1010.6 1014.7 1017.8 1008.6 MAX. QFE PRESSURE IN HPA 1024.2 1020.4 1016.5 1016.7 1010.5 1003.6 1000.8 1001.4 1009.7 1015.1 1019.2 1022.5 1024.2 DAY 28 11 15 7 12 2 30 7 30 30 30 2 MIN. QFE PRESSURE IN HPA 1010.8 1008.9 1004.4 1004.4 1000.9 995.7 992.4 993.1 998.1 1004.2 1009.6 1010.1 992.4 DAY 6 9 13 19 23 8 27 13 10 4 25 13 MEAN QNH PRESSURE IN HPA 1023.6 1019.8 1015.3 1014.6 1008.9 1003.4 1000.5 1001.3 1007.2 1014.5 1018.6 1021.7 1012.5 MAX. QNH PRESSURE IN HPA 1028.1 1024.3 1020.4 1020.6 1014.4 1007.5 1004.7 1005.3 1013.6 1019.0 1023.1 1026.4 1028.1 DAY 28 11 15 7 12 2 30 7 30 30 30 2 MIN. QNH PRESSURE IN HPA 1014.7 1012.8 1008.3 1008.3 1004.8 999.5 996.2 996.9 1001.9 1008.1 1013.5 1014.0 996.2 DAY 6 9 13 19 23 8 27 13 10 4 25 13 MEAN QFF PRESSURE IN HPA 1023.9 1020.1 1015.6 1014.7 1008.9 1003.4 1000.4 1001.2 1007.3 1014.6 1018.8 1022.0 1012.6 MAX. QFF PRESSURE IN HPA 1028.5 1024.6 1020.7 1020.8 1014.4 1007.5 1004.6 1005.2 1013.6 1019.2 1023.4 1026.7 1028.5 DAY 28 11 15 7 12 2 30 7 30 30 30 2 MIN. QFF PRESSURE IN HPA 1015.0 1013.0 1008.5 1008.3 1004.8 999.5 996.2 996.8 1001.9 1008.1 1013.7 1014.2 996.2 DAY 6 9 13 19 23 8 27 13 10 4 25 13 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.0 1014.1 1010.0 1009.1 1003.5 998.1 995.0 995.6 1001.6 1008.9 1013.2 1016.5 1007.0 MAX. QFE PRESSURE IN HPA 1021.9 1019.3 1013.5 1015.6 1007.6 1001.8 998.9 1000.0 1008.1 1013.7 1017.4 1020.5 1021.9 DAY 28 11 31 7 12 1 30 7 30 28 30 1 MIN. QFE PRESSURE IN HPA 1008.4 1008.5 1003.1 1003.4 999.4 994.0 990.8 991.5 996.9 1002.5 1008.7 1009.6 990.8 DAY 6 18 13 26 23 8 27 13 10 4 25 13 MEAN QNH PRESSURE IN HPA 1021.9 1018.0 1013.9 1012.9 1007.4 1002.0 998.8 999.5 1005.5 1012.8 1017.1 1020.4 1010.8 MAX. QNH PRESSURE IN HPA 1025.8 1023.2 1017.4 1019.5 1011.5 1005.7 1002.8 1003.9 1012.0 1017.6 1021.3 1024.4 1025.8 DAY 28 11 31 7 12 1 30 7 30 28 30 1 MIN. QNH PRESSURE IN HPA 1012.3 1012.4 1007.0 1007.3 1003.3 997.8 994.6 995.3 1000.7 1006.4 1012.6 1013.5 994.6 DAY 6 18 13 26 23 8 27 13 10 4 25 13 MEAN QFF PRESSURE IN HPA 1022.2 1018.3 1014.1 1013.1 1007.4 1001.9 998.8 999.4 1005.5 1012.9 1017.3 1020.6 1011.0 MAX. QFF PRESSURE IN HPA 1026.2 1023.5 1017.6 1019.7 1011.5 1005.7 1002.7 1003.8 1012.0 1017.8 1021.6 1024.7 1026.2 DAY 28 11 31 7 12 1 30 7 30 28 30 2 MIN. QFF PRESSURE IN HPA 1012.6 1012.6 1007.2 1007.3 1003.3 997.8 994.6 995.2 1000.8 1006.4 1012.8 1013.7 994.6 DAY 6 18 13 26 23 8 27 13 10 4 25 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.2 1014.0 1010.0 1008.6 1002.8 997.5 994.4 995.0 1001.4 1009.0 1013.5 1016.8 1006.8 MAX. QFE PRESSURE IN HPA 1022.4 1019.2 1013.5 1014.8 1007.2 1001.5 998.5 1000.5 1008.1 1014.0 1018.1 1020.6 1022.4 DAY 17 11 31 7 12 1 30 7 30 27 30 1 MIN. QFE PRESSURE IN HPA 1011.1 1007.3 1003.0 1002.8 998.4 993.3 990.0 990.5 997.1 1002.7 1009.4 1010.1 990.0 DAY 6 28 13 25 29 8 26 13 11 4 2 23 MEAN QNH PRESSURE IN HPA 1022.1 1017.9 1013.9 1012.4 1006.7 1001.3 998.2 998.8 1005.3 1012.8 1017.4 1020.7 1010.6 MAX. QNH PRESSURE IN HPA 1026.3 1023.1 1017.4 1018.7 1011.1 1005.4 1002.3 1004.4 1012.0 1017.9 1022.0 1024.5 1026.3 DAY 17 11 31 7 12 1 30 7 30 27 30 1 MIN. QNH PRESSURE IN HPA 1015.0 1011.2 1006.9 1006.7 1002.2 997.1 993.8 994.3 1000.9 1006.6 1013.3 1014.0 993.8 DAY 6 28 13 25 29 8 26 13 11 4 2 23 MEAN QFF PRESSURE IN HPA 1022.4 1018.2 1014.1 1012.6 1006.7 1001.3 998.2 998.8 1005.4 1013.0 1017.6 1021.0 1010.8 MAX. QFF PRESSURE IN HPA 1026.7 1023.4 1017.7 1019.0 1011.1 1005.4 1002.3 1004.3 1012.1 1018.1 1022.3 1024.8 1026.7 DAY 17 11 31 7 12 1 30 7 30 27 30 1 MIN. QFF PRESSURE IN HPA 1015.3 1011.4 1007.1 1006.8 1002.3 997.1 993.8 994.3 1001.0 1006.7 1013.4 1014.2 993.8 DAY 6 28 13 25 29 8 26 13 11 4 2 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1014.8 1010.9 1009.6 1004.0 998.5 995.6 996.5 1002.8 1009.7 1014.3 1017.4 1007.8 MAX. QFE PRESSURE IN HPA 1022.7 1019.8 1014.9 1015.9 1008.2 1002.0 1000.7 1000.5 1009.2 1014.9 1019.3 1021.7 1022.7 DAY 12 11 31 7 11 1 29 7 30 27 30 1 MIN. QFE PRESSURE IN HPA 1013.9 1008.3 1004.1 1004.5 999.6 994.3 991.7 991.6 998.3 1003.7 1010.3 1009.7 991.6 DAY 6 28 13 25 29 8 26 13 8 3 25 23 MEAN QNH PRESSURE IN HPA 1022.9 1018.7 1014.7 1013.5 1007.8 1002.4 999.5 1000.4 1006.7 1013.6 1018.2 1021.4 1011.6 MAX. QNH PRESSURE IN HPA 1026.6 1023.7 1018.8 1019.8 1012.1 1005.9 1004.6 1004.4 1013.1 1018.8 1023.2 1025.6 1026.6 DAY 12 11 31 7 11 1 29 7 30 27 30 1 MIN. QNH PRESSURE IN HPA 1017.8 1012.2 1008.0 1008.4 1003.5 998.1 995.5 995.4 1002.1 1007.6 1014.2 1013.6 995.4 DAY 6 28 13 25 29 8 26 13 8 3 25 23 MEAN QFF PRESSURE IN HPA 1023.2 1019.0 1015.0 1013.6 1007.8 1002.4 999.4 1000.4 1006.7 1013.7 1018.5 1021.7 1011.8 MAX. QFF PRESSURE IN HPA 1027.0 1024.1 1019.1 1020.0 1012.1 1005.9 1004.5 1004.3 1013.2 1019.0 1023.5 1025.9 1027.0 DAY 17 11 31 7 11 1 29 7 30 27 30 1 MIN. QFF PRESSURE IN HPA 1018.1 1012.4 1008.2 1008.4 1003.5 998.1 995.5 995.4 1002.2 1007.7 1014.4 1013.8 995.4 DAY 6 28 13 25 29 8 26 13 8 3 25 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1014.8 1011.0 1010.0 1004.4 999.1 996.1 996.9 1003.1 1009.6 1014.3 1017.3 1008.0 MAX. QFE PRESSURE IN HPA 1022.8 1019.5 1015.3 1016.8 1008.8 1002.9 1002.2 1001.1 1009.5 1014.7 1019.8 1021.7 1022.8 DAY 28 6 1 21 12 1 29 7 30 27 30 1 MIN. QFE PRESSURE IN HPA 1014.1 1008.5 1002.8 1004.8 1000.0 995.3 992.3 992.6 998.1 1003.7 1010.1 1009.0 992.3 DAY 6 28 13 18 29 8 26 13 10 3 2 23 MEAN QNH PRESSURE IN HPA 1022.9 1018.7 1014.9 1013.9 1008.2 1003.0 999.9 1000.7 1007.0 1013.5 1018.2 1021.2 1011.8 MAX. QNH PRESSURE IN HPA 1026.7 1023.4 1019.2 1020.7 1012.7 1006.8 1006.1 1005.0 1013.4 1018.6 1023.7 1025.6 1026.7 DAY 28 6 1 21 12 1 29 7 30 27 30 1 MIN. QNH PRESSURE IN HPA 1018.0 1012.4 1006.7 1008.7 1003.9 999.1 996.1 996.4 1001.9 1007.6 1014.0 1012.9 996.1 DAY 6 28 13 18 29 8 26 13 10 3 2 23 MEAN QFF PRESSURE IN HPA 1023.2 1018.9 1015.1 1014.0 1008.2 1002.9 999.9 1000.7 1007.0 1013.6 1018.4 1021.5 1012.0 MAX. QFF PRESSURE IN HPA 1027.1 1023.7 1019.4 1020.9 1012.7 1006.7 1006.0 1004.9 1013.4 1018.8 1024.0 1025.9 1027.1 DAY 28 6 1 21 12 1 29 7 30 27 30 1 MIN. QFF PRESSURE IN HPA 1018.2 1012.5 1006.8 1008.7 1003.8 999.1 996.1 996.3 1001.9 1007.6 1014.1 1013.1 996.1 DAY 6 28 13 30 29 8 26 13 10 3 2 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.2 14.6 18.1 24.8 31.4 34.9 36.9 36.3 32.8 27.5 18.3 13.9 25.1 MINIMUN AIR TEMPERATURE (C) 6.6 9.0 12.0 17.5 21.7 24.4 27.3 27.1 23.0 19.1 12.0 9.2 17.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 7 20 30 31 31 26 10 1 0 156 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) 0.0 4.0 5.0 8.0 18.0 21.0 24.0 24.0 19.0 15.0 0.6 0.2 0.0 DAY 1 6 6 2 6 21 1 26 26 7 15 29 MAXIMUM AIR TEMPERATURE (C) 16.8 21.1 24.8 32.2 40.4 44.4 46.4 45.5 43.3 37.2 26.9 20.2 33.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 3 21 31 30 31 31 30 30 10 0 217 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 26.0 33.5 40.0 46.0 50.0 51.0 49.0 48.0 41.0 36.0 26.0 51.0 DAY 25 29 30 18 31 13 13 1 8 4 3 13 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 12.1 12.8 14.7 18.7 20.0 19.1 18.4 20.3 18.1 14.9 11.0 15.9 MEAN DAILY TEMP. (MDT) (C) 11.7 15.1 18.4 24.9 31.0 34.4 36.9 36.3 33.1 28.1 19.4 14.7 25.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 10.3 129.7 311.3 402.2 491.4 474.9 364.4 221.6 48.9 0.0 2454.6 HEATING DEG. DAYS(BASE 18 0C) 195.8 84.5 29.1 1.5 0.0 0.0 0.0 0.0 0.0 0.0 52.9 106.9 470.7 DEWPOINT (MEAN C) 7.6 8.0 9.3 11.0 11.0 10.1 11.9 12.3 7.4 9.8 6.5 6.3 9.3 MIXING RATIO (G/KG) 6.60 6.81 7.48 8.63 8.42 8.04 9.41 9.55 6.91 8.04 6.46 6.16 7.71 VAPOUR PRESSURE (HPA) 10.68 10.96 11.99 13.77 13.41 12.73 14.77 15.03 10.98 12.86 10.41 9.94 12.29 SATURATION DEF. (HPA) 3.03 6.25 9.75 19.56 35.49 46.97 51.17 48.75 42.16 26.01 12.60 6.69 25.70 RELATIVE HUMIDITY (MEAN %) 80 68 61 46 32 25 26 27 24 37 50 63 45 RELATIVE HUMIDITY (MAX. %) 93 88 82 70 50 42 44 44 41 60 70 78 64 RELATIVE HUMIDITY (MIN. %) 61 42 37 25 17 12 12 13 10 18 28 43 27 RELATIVE HUMIDITY (MEAN% 03UTC) 89 84 79 66 48 40 40 42 37 55 65 75 60 RELATIVE HUMIDITY (MEAN% 09UTC) 70 53 45 36 21 16 18 17 15 24 38 52 34 RELATIVE HUMIDITY (MEAN% 15UTC) 75 56 48 31 21 16 14 16 14 27 43 59 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 71.3 49.9 35.4 18.4 0.0 0.0 0.0 0.0 0.0 0.0 50.7 27.5 253.2 DAYS WITH PRECIPITATION >=10 4 1 1 1 0 0 0 0 0 0 1 1 9 DAYS WITH PRECIPITATION >= 5 5 3 3 2 0 0 0 0 0 0 1 3 17 DAYS WITH PRECIPITATION >= 1 8 5 5 3 0 0 0 0 0 0 3 3 27 DAYS WITH PRECIPITATION 9 11 8 7 0 0 0 0 0 0 4 6 45 GREATEST DAILY PRECIPITATION 17.0 27.0 19.1 10.3 0.0 0.0 0.0 0.0 0.0 0.0 48.0 10.0 48.0 DAY 13 23 5 15 ** ** ** ** ** ** 11 17 DAY WITH THUNDER STORM 4 4 2 3 0 0 0 0 0 1 3 1 18 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 8 15 14 17 19 16 8 14 7 3 3 127 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 7.6 9.6 9.7 10.0 11.6 12.8 10.0 9.1 10.4 9.3 8.6 8.8 10.0 PREVAILING WIND PERCENT 23.0 29.3 45.2 27.1 51.6 45.0 21.0 36.3 34.6 23.8 30.8 33.1 33.4 CALMS PERCENT OF WIND 41.1 25.9 12.5 20.8 14.5 17.9 29.0 25.4 27.1 40.7 38.8 30.6 27.0 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 281 268 294 270 308 302 270 293 300 281 296 305 295 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.0 3.5 2.2 8.0 7.4 3.5 4.3 4.6 1.8 1.5 2.0 3.3 WIND STEADINESES (MEAN %) 22.4 13.0 38.9 26.8 84.2 76.3 53.0 62.3 66.7 34.0 27.8 32.3 45.8 WIND SPEED (MEAN KNOTS) 4.9 7.7 9.0 8.2 9.5 9.7 6.6 6.9 6.9 5.3 5.4 6.2 7.2 FASTEST WIND DIRECTION 170 160 150 180 320 330 280 280 280 170 30 260 30 FASTEST WIND SPEED (KNOTS) 19 31 29 29 25 35 19 29 31 23 39 39 39 DAY 6 2 1 25 21 15 13 25 1 2 11 27 DAYS WITH SKY CLEAR (0-2)/8 13 12 11 10 25 29 29 30 30 19 16 10 234 DAYS WITH P.CLOUDY (3-6)/8 11 8 12 9 5 1 2 1 0 11 8 11 79 DAYS WITH CLOUDY (7-8)/8 7 9 8 11 1 0 0 0 0 1 6 10 53 DAYS WITH VISIBILITY =< 2 KM 8 2 4 1 0 0 3 0 2 0 1 2 23 DURATION OF SUNSHINE HOURS 179.8 199.2 197.6 194.7 290.5 357.2 364.0 351.0 298.0 262.4 196.9 140.1 3031.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.9 1013.3 1010.7 1008.1 1004.1 998.3 992.9 995.5 1001.1 1008.7 1014.9 1016.1 1006.7 MAX. QFE PRESSURE IN HPA 1023.5 1020.8 1017.2 1015.6 1011.1 1003.4 998.4 1002.8 1006.8 1014.9 1022.3 1028.6 1028.6 DAY-HOUR 20- 6 4-15 6- 6 8- 6 8- 6 3- 6 30- 6 31- 6 14- 6 28- 6 15- 6 29- 6 MIN. QFE PRESSURE IN HPA 1008.7 1004.3 1002.0 998.9 999.1 992.5 987.9 990.0 995.4 1001.9 1009.7 1003.8 987.9 DAY-HOUR 26- 0 23-12 8-15 25-15 27-15 27-15 14-15 2-15 16-15 1-12 10-21 26- 3 MEAN QNH PRESSURE IN HPA 1020.8 1017.2 1014.5 1011.9 1008.0 1002.1 996.7 999.3 1004.9 1012.5 1018.8 1020.0 1010.6 MAX. QNH PRESSURE IN HPA 1027.4 1024.7 1021.1 1019.5 1015.0 1007.3 1002.2 1006.7 1010.7 1018.8 1026.2 1032.5 1032.5 DAY-HOUR 20- 6 4-15 6- 6 8- 6 8- 6 3- 6 30- 6 31- 6 14- 6 28- 6 15- 6 29- 6 MIN. QNH PRESSURE IN HPA 1012.6 1008.2 1005.9 1002.8 1003.0 996.3 991.7 993.8 999.2 1005.8 1013.6 1007.7 991.7 DAY-HOUR 26- 0 23-12 8-15 25-15 27-15 27-15 14-15 2-15 16-15 1-12 10-21 26- 3 MEAN QFF PRESSURE IN HPA 1021.2 1017.5 1014.8 1012.1 1008.0 1002.1 996.7 999.3 1005.0 1012.6 1019.1 1020.3 1010.7 MAX. QFF PRESSURE IN HPA 1027.9 1025.1 1021.5 1019.7 1015.1 1007.3 1002.2 1006.7 1010.7 1018.9 1026.6 1033.0 1033.0 DAY-HOUR 20- 6 4-15 6- 6 8- 6 8- 6 3- 9 30- 6 31- 6 25- 6 28- 6 15- 6 29- 6 MIN. QFF PRESSURE IN HPA 1012.8 1008.4 1006.1 1002.9 1003.0 996.4 991.7 993.8 999.3 1005.8 1013.7 1007.9 991.7 DAY-HOUR 26- 0 23-12 8-15 25-15 27-15 27-15 14-15 2-15 16-15 1-12 10-21 26- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.9 1013.3 1010.6 1007.7 1003.7 998.4 992.7 994.9 1000.7 1008.1 1014.5 1015.9 1006.4 MAX. QFE PRESSURE IN HPA 1023.4 1020.3 1015.5 1013.0 1009.1 1002.3 997.1 999.9 1005.2 1013.1 1021.1 1025.7 1025.7 DAY 3 5 17 7 8 3 30 31 15 28 15 29 MIN. QFE PRESSURE IN HPA 1008.7 1005.6 1003.6 1001.2 1000.3 993.8 988.5 991.0 997.0 1002.2 1009.7 1005.5 988.5 DAY 26 2 9 19 28 28 14 2 17 1 11 26 MEAN QNH PRESSURE IN HPA 1020.8 1017.2 1014.5 1011.6 1007.5 1002.3 996.5 998.7 1004.6 1012.0 1018.4 1019.8 1010.3 MAX. QNH PRESSURE IN HPA 1027.3 1024.2 1019.4 1016.9 1013.0 1006.2 1000.9 1003.8 1009.1 1017.0 1025.0 1029.6 1029.6 DAY 3 5 17 7 8 3 30 31 15 28 15 29 MIN. QNH PRESSURE IN HPA 1012.6 1009.5 1007.5 1005.1 1004.2 997.6 992.3 994.8 1000.8 1006.1 1013.6 1009.4 992.3 DAY 26 2 9 19 28 28 14 2 17 1 11 26 MEAN QFF PRESSURE IN HPA 1021.2 1017.5 1014.7 1011.7 1007.6 1002.3 996.5 998.7 1004.6 1012.0 1018.6 1020.1 1010.4 MAX. QFF PRESSURE IN HPA 1027.7 1024.5 1019.7 1017.1 1013.1 1006.2 1000.9 1003.7 1009.1 1017.1 1025.4 1030.0 1030.0 DAY 3 5 17 7 8 3 30 31 15 28 15 29 MIN. QFF PRESSURE IN HPA 1012.8 1009.7 1007.6 1005.1 1004.1 997.6 992.2 994.8 1000.8 1006.1 1013.7 1009.6 992.2 DAY 26 2 9 19 28 28 14 2 17 1 11 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.6 1013.2 1010.5 1008.1 1004.3 998.5 993.3 995.6 1001.1 1008.6 1015.1 1016.0 1006.7 MAX. QFE PRESSURE IN HPA 1022.8 1019.4 1015.7 1013.8 1010.1 1002.7 997.6 1002.0 1005.2 1013.1 1021.3 1025.5 1025.5 DAY 3 20 15 7 8 3 30 31 15 28 15 29 MIN. QFE PRESSURE IN HPA 1009.2 1004.8 1003.6 1001.3 1000.2 993.4 989.3 992.2 997.3 1002.5 1010.9 1003.8 989.3 DAY 26 2 9 25 18 30 18 2 17 1 19 26 MEAN QNH PRESSURE IN HPA 1020.5 1017.1 1014.3 1012.0 1008.1 1002.4 997.1 999.4 1005.0 1012.5 1019.0 1019.9 1010.6 MAX. QNH PRESSURE IN HPA 1026.7 1023.3 1019.6 1017.7 1014.0 1006.6 1001.4 1005.9 1009.1 1017.0 1025.2 1029.4 1029.4 DAY 3 20 15 7 8 3 30 31 15 28 15 29 MIN. QNH PRESSURE IN HPA 1013.1 1008.7 1007.5 1005.2 1004.1 997.2 993.1 996.0 1001.1 1006.4 1014.8 1007.7 993.1 DAY 26 2 9 25 18 30 18 2 17 1 19 26 MEAN QFF PRESSURE IN HPA 1020.9 1017.4 1014.6 1012.1 1008.2 1002.4 997.1 999.4 1005.0 1012.6 1019.2 1020.2 1010.8 MAX. QFF PRESSURE IN HPA 1027.1 1023.6 1019.9 1017.9 1014.1 1006.6 1001.4 1005.9 1009.1 1017.2 1025.7 1029.9 1029.9 DAY 3 20 15 7 8 3 30 31 15 28 15 29 MIN. QFF PRESSURE IN HPA 1013.4 1008.9 1007.6 1005.3 1004.1 997.2 993.1 996.0 1001.2 1006.5 1015.0 1007.9 993.1 DAY 26 2 9 25 18 30 18 2 17 1 19 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.0 1014.6 1011.6 1009.3 1005.4 999.4 994.2 996.9 1002.6 1010.0 1016.3 1017.5 1008.0 MAX. QFE PRESSURE IN HPA 1023.5 1020.7 1017.2 1015.6 1011.1 1003.4 998.4 1002.8 1006.8 1014.9 1022.3 1028.6 1028.6 DAY 20 20 6 8 8 3 30 31 14 28 15 29 MIN. QFE PRESSURE IN HPA 1011.2 1007.1 1006.1 1002.3 1001.3 995.1 990.5 993.6 998.6 1003.6 1011.0 1005.8 990.5 DAY 26 2 9 25 27 28 18 2 17 1 11 26 MEAN QNH PRESSURE IN HPA 1021.9 1018.5 1015.5 1013.2 1009.3 1003.2 998.1 1000.7 1006.4 1013.9 1020.2 1021.4 1011.9 MAX. QNH PRESSURE IN HPA 1027.4 1024.6 1021.1 1019.5 1015.0 1007.3 1002.2 1006.7 1010.7 1018.8 1026.2 1032.5 1032.5 DAY 20 20 6 8 8 3 30 31 14 28 15 29 MIN. QNH PRESSURE IN HPA 1015.1 1011.0 1010.0 1006.2 1005.2 998.9 994.3 997.4 1002.4 1007.5 1014.9 1009.7 994.3 DAY 26 2 9 25 27 28 18 2 17 1 11 26 MEAN QFF PRESSURE IN HPA 1022.2 1018.8 1015.8 1013.3 1009.3 1003.2 998.0 1000.7 1006.5 1014.0 1020.5 1021.7 1012.0 MAX. QFF PRESSURE IN HPA 1027.9 1024.9 1021.5 1019.7 1015.1 1007.3 1002.2 1006.7 1010.7 1018.9 1026.6 1033.0 1033.0 DAY 20 20 6 8 8 3 30 31 25 28 15 29 MIN. QFF PRESSURE IN HPA 1015.4 1011.2 1010.1 1006.3 1005.2 998.9 994.3 997.4 1002.5 1007.6 1015.0 1009.9 994.3 DAY 26 2 9 25 27 30 18 2 17 1 11 26 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1014.1 1011.4 1009.1 1004.9 998.8 993.7 996.4 1001.9 1009.3 1015.6 1016.6 1007.4 MAX. QFE PRESSURE IN HPA 1023.2 1020.6 1017.0 1014.9 1010.0 1003.4 997.6 1002.8 1006.1 1013.5 1021.2 1026.5 1026.5 DAY 3 4 15 8 8 3 11 31 14 28 15 29 MIN. QFE PRESSURE IN HPA 1011.6 1007.5 1005.8 1001.1 1000.1 994.4 990.0 992.2 998.0 1002.9 1011.1 1005.8 990.0 DAY 26 2 20 25 27 30 18 2 16 1 19 26 MEAN QNH PRESSURE IN HPA 1021.4 1018.0 1015.3 1013.0 1008.8 1002.6 997.6 1000.3 1005.8 1013.2 1019.5 1020.5 1011.3 MAX. QNH PRESSURE IN HPA 1027.1 1024.5 1020.9 1018.8 1013.9 1007.3 1001.4 1006.7 1010.0 1017.4 1025.1 1030.4 1030.4 DAY 3 4 15 8 8 3 11 31 14 28 15 29 MIN. QNH PRESSURE IN HPA 1015.5 1011.4 1009.7 1005.0 1004.0 998.2 993.8 996.0 1001.8 1006.8 1015.0 1009.7 993.8 DAY 26 2 20 25 27 30 18 2 16 1 19 26 MEAN QFF PRESSURE IN HPA 1021.7 1018.3 1015.5 1013.1 1008.8 1002.6 997.5 1000.2 1005.8 1013.3 1019.7 1020.8 1011.4 MAX. QFF PRESSURE IN HPA 1027.5 1024.8 1021.2 1019.0 1014.0 1007.3 1001.4 1006.7 1010.0 1017.5 1025.5 1030.8 1030.8 DAY 3 4 15 8 8 3 11 31 14 28 15 29 MIN. QFF PRESSURE IN HPA 1015.8 1011.6 1009.8 1005.0 1004.0 998.2 993.8 996.0 1001.8 1006.8 1015.2 1009.9 993.8 DAY 26 2 20 25 27 30 18 2 16 1 19 26 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1012.1 1009.8 1007.3 1003.5 997.5 992.1 994.7 1000.2 1007.7 1014.0 1015.0 1005.8 MAX. QFE PRESSURE IN HPA 1021.6 1019.5 1014.9 1013.3 1008.3 1002.0 996.1 1001.2 1004.4 1011.8 1020.0 1025.6 1025.6 DAY 3 4 15 7 8 3 11 31 14 28 14 29 MIN. QFE PRESSURE IN HPA 1010.4 1004.3 1004.9 1000.5 999.6 993.3 988.3 990.7 995.7 1001.9 1009.8 1006.0 988.3 DAY 25 23 20 25 27 27 14 2 16 1 19 26 MEAN QNH PRESSURE IN HPA 1020.0 1016.0 1013.6 1011.2 1007.3 1001.3 995.9 998.5 1004.1 1011.6 1017.9 1018.9 1009.7 MAX. QNH PRESSURE IN HPA 1025.5 1023.4 1018.8 1017.2 1012.2 1005.9 999.9 1005.1 1008.3 1015.7 1023.9 1029.5 1029.5 DAY 3 4 15 7 8 3 11 31 14 28 14 29 MIN. QNH PRESSURE IN HPA 1014.3 1008.2 1008.8 1004.4 1003.5 997.1 992.1 994.5 999.5 1005.8 1013.7 1009.9 992.1 DAY 25 23 20 25 27 27 14 2 16 1 19 26 MEAN QFF PRESSURE IN HPA 1020.3 1016.3 1013.9 1011.3 1007.4 1001.3 995.9 998.5 1004.1 1011.7 1018.1 1019.2 1009.8 MAX. QFF PRESSURE IN HPA 1025.9 1023.7 1019.1 1017.4 1012.3 1005.9 999.9 1005.1 1008.3 1015.8 1024.2 1029.9 1029.9 DAY 3 4 15 7 8 3 11 31 14 28 14 29 MIN. QFF PRESSURE IN HPA 1014.5 1008.4 1008.9 1004.4 1003.5 997.1 992.0 994.5 999.5 1005.8 1013.9 1010.1 992.0 DAY 25 23 20 25 27 27 14 2 16 1 19 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.0 1012.4 1009.7 1006.9 1003.0 996.9 991.3 994.3 999.9 1007.8 1014.2 1015.5 1005.7 MAX. QFE PRESSURE IN HPA 1021.0 1020.8 1015.0 1012.0 1008.3 1001.3 995.2 1000.9 1003.8 1011.9 1021.0 1025.6 1025.6 DAY 2 4 15 7 3 3 11 31 14 31 14 29 MIN. QFE PRESSURE IN HPA 1010.2 1006.2 1002.0 998.9 999.1 992.5 987.9 990.0 995.4 1002.5 1010.2 1005.9 987.9 DAY 25 23 8 25 27 27 14 2 16 1 10 25 MEAN QNH PRESSURE IN HPA 1019.9 1016.3 1013.6 1010.8 1006.8 1000.7 995.2 998.1 1003.8 1011.7 1018.1 1019.4 1009.5 MAX. QNH PRESSURE IN HPA 1024.9 1024.7 1018.9 1015.9 1012.2 1005.2 999.0 1004.8 1007.7 1015.8 1024.9 1029.5 1029.5 DAY 2 4 15 7 3 3 11 31 14 31 14 29 MIN. QNH PRESSURE IN HPA 1014.1 1010.1 1005.9 1002.8 1003.0 996.3 991.7 993.8 999.2 1006.4 1014.1 1009.8 991.7 DAY 25 23 8 25 27 27 14 2 16 1 10 25 MEAN QFF PRESSURE IN HPA 1020.3 1016.6 1013.8 1010.9 1006.9 1000.7 995.1 998.1 1003.8 1011.8 1018.3 1019.7 1009.7 MAX. QFF PRESSURE IN HPA 1025.3 1025.1 1019.2 1016.1 1012.3 1005.2 999.0 1004.8 1007.7 1016.0 1025.3 1030.0 1030.0 DAY 2 4 15 7 3 3 11 31 14 31 14 29 MIN. QFF PRESSURE IN HPA 1014.4 1010.3 1006.1 1002.9 1003.0 996.4 991.7 993.8 999.3 1006.5 1014.2 1010.1 991.7 DAY 25 23 8 25 27 27 14 2 16 1 10 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.2 1013.2 1010.8 1008.0 1004.0 998.1 992.6 995.5 1001.1 1009.0 1015.1 1016.3 1006.7 MAX. QFE PRESSURE IN HPA 1022.1 1020.1 1015.8 1014.0 1009.1 1001.7 996.5 1001.6 1005.2 1013.0 1022.1 1025.6 1025.6 DAY 2 4 14 12 3 3 11 31 14 31 14 29 MIN. QFE PRESSURE IN HPA 1010.5 1005.2 1004.8 1001.4 999.7 993.6 988.8 990.9 995.4 1003.5 1010.8 1005.8 988.8 DAY 25 16 8 25 27 27 14 2 16 1 10 25 MEAN QNH PRESSURE IN HPA 1021.1 1017.1 1014.7 1011.9 1007.9 1001.9 996.4 999.3 1005.0 1012.8 1019.0 1020.3 1010.6 MAX. QNH PRESSURE IN HPA 1026.0 1024.0 1019.7 1017.9 1013.0 1005.6 1000.3 1005.5 1009.1 1016.9 1026.0 1029.5 1029.5 DAY 2 4 14 12 3 3 11 31 14 31 14 29 MIN. QNH PRESSURE IN HPA 1014.4 1009.1 1008.7 1005.3 1003.6 997.4 992.6 994.7 999.2 1007.4 1014.7 1009.7 992.6 DAY 25 16 8 25 27 27 14 2 16 1 10 25 MEAN QFF PRESSURE IN HPA 1021.5 1017.4 1014.9 1012.1 1007.9 1001.9 996.4 999.3 1005.0 1012.9 1019.2 1020.6 1010.8 MAX. QFF PRESSURE IN HPA 1026.5 1024.4 1020.0 1018.0 1013.1 1005.6 1000.3 1005.5 1009.1 1017.1 1026.4 1030.0 1030.0 DAY 2 4 14 12 7 3 11 31 14 31 14 29 MIN. QFF PRESSURE IN HPA 1014.7 1009.3 1008.9 1005.3 1003.6 997.5 992.6 994.7 999.3 1007.5 1014.8 1010.0 992.6 DAY 25 16 8 25 27 27 14 2 16 1 10 25 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1017.3 1013.5 1011.1 1008.1 1004.4 998.7 993.1 995.9 1001.3 1008.9 1014.9 1016.4 1007.0 MAX. QFE PRESSURE IN HPA 1022.8 1020.1 1016.1 1013.3 1009.9 1001.8 996.8 1002.0 1005.6 1013.1 1022.1 1026.0 1026.0 DAY 2 4 14 6 3 2 29 31 14 23 14 28 MIN. QFE PRESSURE IN HPA 1010.5 1005.1 1002.5 1001.0 1000.5 994.1 989.5 991.3 997.0 1004.0 1009.7 1006.8 989.5 DAY 25 16 8 24 31 30 13 2 16 1 10 25 MEAN QNH PRESSURE IN HPA 1021.3 1017.4 1015.0 1012.0 1008.3 1002.6 996.9 999.7 1005.1 1012.8 1018.8 1020.3 1010.9 MAX. QNH PRESSURE IN HPA 1026.7 1024.0 1020.0 1017.2 1013.8 1005.7 1000.6 1005.9 1009.5 1017.0 1026.0 1029.9 1029.9 DAY 2 4 14 6 3 2 29 31 14 23 14 28 MIN. QNH PRESSURE IN HPA 1014.4 1009.0 1006.4 1004.9 1004.4 997.9 993.3 995.1 1000.8 1007.9 1013.6 1010.7 993.3 DAY 25 16 8 24 31 30 13 2 16 1 10 25 MEAN QFF PRESSURE IN HPA 1021.6 1017.7 1015.2 1012.1 1008.3 1002.6 996.9 999.7 1005.2 1012.9 1019.0 1020.6 1011.0 MAX. QFF PRESSURE IN HPA 1027.1 1024.3 1020.3 1017.4 1013.9 1005.6 1000.6 1005.9 1009.5 1017.1 1026.4 1030.3 1030.3 DAY 2 4 14 6 3 2 29 31 24 23 14 28 MIN. QFF PRESSURE IN HPA 1014.7 1009.2 1006.5 1004.9 1004.3 997.9 993.2 995.1 1000.8 1007.9 1013.7 1010.9 993.2 DAY 25 16 8 24 31 30 13 2 16 1 10 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.6 12.3 19.1 25.6 31.5 34.9 37.7 36.2 31.7 26.6 19.1 12.5 24.7 MINIMUN AIR TEMPERATURE (C) 4.2 6.1 12.9 18.0 22.4 23.8 27.7 26.2 22.4 17.8 13.4 8.4 17.0 DAYS WITH MINIMUM TEMP. >=21 0 0 1 5 24 30 31 31 23 1 0 0 146 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 4 0 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS LOWEST(C) -2.0 1.0 5.0 7.0 17.0 21.0 25.0 24.0 17.0 11.0 7.0 4.0 -2.0 DAY 5 4 31 1 15 2 2 13 20 24 22 8 MAXIMUM AIR TEMPERATURE (C) 16.0 19.7 26.1 33.4 40.4 45.4 48.0 46.7 41.9 36.5 25.8 17.8 33.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 6 25 31 30 31 31 30 31 3 0 218 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.0 26.0 34.0 38.0 48.0 50.0 50.0 50.0 47.0 44.0 30.2 27.0 50.0 DAY 22 28 7 16 25 28 20 27 9 9 2 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 13.6 13.2 15.4 18.0 21.6 20.3 20.5 19.5 18.7 12.4 9.4 16.1 MEAN DAILY TEMP. (MDT) (C) 10.1 12.9 19.5 25.7 31.4 34.6 37.9 36.5 32.1 27.1 19.6 13.1 25.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 15.7 149.6 323.0 409.1 523.1 479.3 333.7 190.0 12.4 1.4 2437.3 HEATING DEG. DAYS(BASE 18 0C) 245.6 142.5 16.7 2.5 0.0 0.0 0.0 0.0 0.0 0.0 12.3 160.2 579.8 DEWPOINT (MEAN C) 2.2 1.0 7.2 8.9 9.3 13.3 15.7 15.1 13.4 11.2 11.8 10.0 9.9 MIXING RATIO (G/KG) 4.53 4.46 6.59 7.40 7.91 10.14 12.30 11.61 10.34 8.63 8.90 7.82 8.39 VAPOUR PRESSURE (HPA) 7.34 7.23 10.57 11.85 12.60 15.97 19.22 18.20 16.34 13.80 14.29 12.60 13.34 SATURATION DEF. (HPA) 5.18 7.92 12.56 22.92 36.90 44.30 50.21 45.72 33.58 23.28 8.67 2.41 24.47 RELATIVE HUMIDITY (MEAN %) 63 51 51 39 30 30 32 33 36 42 65 86 47 RELATIVE HUMIDITY (MAX. %) 80 73 74 63 44 48 50 54 55 60 81 96 65 RELATIVE HUMIDITY (MIN. %) 41 27 29 19 18 17 16 16 21 25 45 68 29 RELATIVE HUMIDITY (MEAN% 03UTC) 77 70 69 60 42 42 47 50 52 57 75 93 61 RELATIVE HUMIDITY (MEAN% 09UTC) 53 37 36 26 21 21 23 22 25 30 52 77 35 RELATIVE HUMIDITY (MEAN% 15UTC) 53 36 39 24 23 20 19 20 27 32 61 85 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 16.0 25.1 66.4 14.7 0.4 0.0 0.0 0.0 0.0 2.5 46.4 123.8 295.3 DAYS WITH PRECIPITATION >=10 0 2 2 0 0 0 0 0 0 0 2 3 9 DAYS WITH PRECIPITATION >= 5 1 2 2 1 0 0 0 0 0 0 3 5 14 DAYS WITH PRECIPITATION >= 1 4 3 5 5 0 0 0 0 0 1 9 7 34 DAYS WITH PRECIPITATION 10 8 9 6 1 0 0 0 0 1 11 8 54 GREATEST DAILY PRECIPITATION 6.0 11.7 42.0 7.0 0.4 0.0 0.0 0.0 0.0 2.5 16.0 58.8 58.8 DAY 2 22 20 22 8 ** ** ** ** 31 12 4 DAY WITH THUNDER STORM 0 0 6 3 1 0 1 0 0 0 6 6 23 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 6 4 13 7 13 12 12 6 10 4 1 1 89 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 270 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.1 8.0 9.0 10.1 11.9 11.2 9.9 10.6 10.6 10.7 9.2 8.8 10.0 PREVAILING WIND PERCENT 33.1 29.9 19.0 21.3 35.1 43.3 19.8 25.0 28.8 17.7 24.6 26.2 26.5 CALMS PERCENT OF WIND 27.0 35.3 19.8 40.4 21.0 19.6 21.8 19.8 34.2 40.3 33.8 47.2 29.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 280 293 221 295 311 299 245 266 290 262 331 271 286 VECTOR WIND MAGNITUDE(KNOTS) 2.1 2.7 1.3 2.4 5.3 6.6 3.3 3.2 3.6 1.8 1.4 1.1 2.6 WIND STEADINESES (MEAN %) 33.3 49.1 15.1 42.1 57.0 76.7 43.4 41.6 55.4 34.0 21.9 20.8 37.7 WIND SPEED (MEAN KNOTS) 6.3 5.5 8.6 5.7 9.3 8.6 7.6 7.7 6.5 5.3 6.4 5.3 6.9 FASTEST WIND DIRECTION 110 170 170 330 340 350 320 310 280 300 340 320 170 FASTEST WIND SPEED (KNOTS) 39 39 51 29 39 39 39 29 25 23 27 39 51 DAY 2 22 10 2 8 25 9 20 10 22 20 28 DAYS WITH SKY CLEAR (0-2)/8 16 15 15 16 20 30 31 30 30 24 12 17 256 DAYS WITH P.CLOUDY (3-6)/8 10 9 6 8 4 0 0 1 0 6 5 6 55 DAYS WITH CLOUDY (7-8)/8 5 4 10 6 7 0 0 0 0 1 13 8 54 DAYS WITH VISIBILITY =< 2 KM 1 2 3 1 0 3 0 0 4 0 0 16 30 DURATION OF SUNSHINE HOURS 193.4 204.3 163.0 222.3 276.8 349.4 344.6 329.4 292.1 271.9 168.3 169.7 2985.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.1 1017.0 1010.0 1009.1 1004.4 998.0 994.5 996.2 1002.1 1009.1 1014.9 1016.6 1007.4 MAX. QFE PRESSURE IN HPA 1023.3 1022.5 1022.2 1021.4 1012.5 1004.0 998.9 1000.2 1010.1 1016.3 1020.3 1022.9 1023.3 DAY-HOUR 18- 9 8- 6 31- 6 1- 6 8-21 1- 6 8- 6 26- 6 24- 6 28- 6 22-18 18- 6 MIN. QFE PRESSURE IN HPA 1007.4 1006.5 999.9 1000.9 996.8 992.4 990.0 992.0 995.7 997.8 1010.0 1010.7 990.0 DAY-HOUR 11-12 22-12 15-12 23-15 30-15 30-15 31-15 1- 0 5-15 4-12 6-21 4- 9 MEAN QNH PRESSURE IN HPA 1021.0 1020.9 1013.9 1013.0 1008.3 1001.8 998.3 1000.1 1006.0 1013.0 1018.8 1020.5 1011.3 MAX. QNH PRESSURE IN HPA 1027.2 1026.4 1026.1 1025.3 1016.4 1007.9 1002.8 1004.1 1014.0 1020.2 1024.2 1026.8 1027.2 DAY-HOUR 18- 9 8- 6 31- 6 1- 6 8-21 1- 6 8- 6 26- 6 24- 6 28- 6 22-18 18- 6 MIN. QNH PRESSURE IN HPA 1011.3 1010.4 1003.8 1004.8 1000.6 996.2 993.8 995.8 999.5 1001.6 1013.9 1014.6 993.8 DAY-HOUR 11-12 22-12 15-12 23-15 30-15 30-15 31-15 1- 0 5-15 4-12 6-21 4- 9 MEAN QFF PRESSURE IN HPA 1021.4 1021.2 1014.1 1013.1 1008.3 1001.8 998.3 1000.0 1006.0 1013.1 1019.0 1020.9 1011.4 MAX. QFF PRESSURE IN HPA 1027.6 1026.8 1026.4 1025.6 1016.5 1007.9 1002.7 1004.1 1014.0 1020.4 1024.6 1027.2 1027.6 DAY-HOUR 18- 9 8- 6 31- 6 1- 6 8-21 1- 6 8- 6 26- 6 24- 6 28- 6 22-18 18- 6 MIN. QFF PRESSURE IN HPA 1011.5 1010.6 1003.9 1004.9 1000.6 996.2 993.8 995.8 999.5 1001.7 1014.1 1014.8 993.8 DAY-HOUR 11-12 22-12 15-12 23-15 30-15 30-15 31-15 1- 0 5-15 4-12 6-21 4- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1016.8 1009.8 1009.0 1003.9 998.0 994.4 996.1 1001.9 1008.9 1014.6 1016.5 1007.2 MAX. QFE PRESSURE IN HPA 1021.4 1021.1 1018.8 1020.6 1011.7 1003.3 997.8 998.6 1007.5 1015.0 1018.6 1021.2 1021.4 DAY 19 4 31 1 9 1 9 26 24 28 23 18 MIN. QFE PRESSURE IN HPA 1008.9 1011.5 1002.6 1002.3 998.5 993.8 991.6 992.0 997.5 1003.5 1010.5 1011.9 991.6 DAY 3 23 10 24 30 30 31 1 6 11 16 15 MEAN QNH PRESSURE IN HPA 1021.0 1020.7 1013.6 1012.9 1007.7 1001.9 998.2 999.9 1005.7 1012.8 1018.5 1020.4 1011.1 MAX. QNH PRESSURE IN HPA 1025.3 1025.0 1022.7 1024.5 1015.6 1007.2 1001.6 1002.4 1011.4 1018.9 1022.5 1025.1 1025.3 DAY 19 4 31 1 9 1 9 26 24 28 23 18 MIN. QNH PRESSURE IN HPA 1012.8 1015.4 1006.5 1006.2 1002.3 997.6 995.4 995.8 1001.3 1007.4 1014.4 1015.8 995.4 DAY 3 23 10 24 30 30 31 1 6 11 16 15 MEAN QFF PRESSURE IN HPA 1021.3 1021.0 1013.8 1013.0 1007.8 1001.9 998.2 999.9 1005.7 1012.9 1018.7 1020.7 1011.2 MAX. QFF PRESSURE IN HPA 1025.7 1025.4 1023.0 1024.8 1015.7 1007.2 1001.6 1002.4 1011.4 1019.0 1022.8 1025.5 1025.7 DAY 19 4 31 1 9 1 9 26 24 28 23 19 MIN. QFF PRESSURE IN HPA 1013.1 1015.6 1006.6 1006.2 1002.4 997.6 995.4 995.8 1001.3 1007.4 1014.6 1016.0 995.4 DAY 3 23 10 24 30 30 31 1 6 11 16 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1016.9 1010.1 1009.6 1004.7 998.5 995.0 996.6 1002.3 1009.4 1014.7 1016.4 1007.6 MAX. QFE PRESSURE IN HPA 1020.8 1021.0 1020.2 1020.6 1011.0 1003.8 998.1 999.3 1008.6 1015.1 1018.2 1021.1 1021.1 DAY 19 15 31 1 8 1 9 26 24 28 27 18 MIN. QFE PRESSURE IN HPA 1010.4 1010.6 1003.3 1003.6 999.0 994.5 991.6 994.1 998.2 1004.3 1010.5 1011.0 991.6 DAY 3 22 10 23 30 30 31 1 6 11 16 4 MEAN QNH PRESSURE IN HPA 1020.7 1020.8 1013.9 1013.5 1008.6 1002.4 998.8 1000.5 1006.2 1013.3 1018.6 1020.3 1011.5 MAX. QNH PRESSURE IN HPA 1024.7 1024.9 1024.1 1024.5 1014.9 1007.7 1001.9 1003.2 1012.5 1019.0 1022.1 1025.0 1025.0 DAY 19 15 31 1 8 1 9 26 24 28 27 18 MIN. QNH PRESSURE IN HPA 1014.3 1014.5 1007.2 1007.5 1002.9 998.3 995.4 997.9 1002.0 1008.2 1014.4 1014.9 995.4 DAY 3 22 10 23 30 30 31 1 6 11 16 4 MEAN QFF PRESSURE IN HPA 1021.1 1021.1 1014.2 1013.6 1008.6 1002.4 998.8 1000.4 1006.2 1013.4 1018.8 1020.6 1011.6 MAX. QFF PRESSURE IN HPA 1025.2 1025.3 1024.5 1024.8 1015.0 1007.7 1001.9 1003.2 1012.6 1019.2 1022.4 1025.4 1025.4 DAY 19 15 31 1 8 1 9 26 24 28 27 18 MIN. QFF PRESSURE IN HPA 1014.6 1014.8 1007.3 1007.6 1002.9 998.3 995.4 997.9 1002.1 1008.3 1014.6 1015.1 995.4 DAY 3 22 10 23 30 30 31 1 6 11 16 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.4 1018.6 1011.2 1010.8 1005.7 999.2 995.8 997.5 1003.5 1010.8 1016.4 1017.8 1008.8 MAX. QFE PRESSURE IN HPA 1022.4 1022.5 1022.2 1021.4 1012.0 1004.0 998.9 1000.2 1010.1 1016.3 1020.1 1022.9 1022.9 DAY 30 8 31 1 8 1 8 26 24 28 26 18 MIN. QFE PRESSURE IN HPA 1012.5 1011.6 1001.3 1004.4 999.6 995.2 993.2 994.0 1000.0 1005.0 1012.0 1012.4 993.2 DAY 11 22 10 23 30 30 30 1 6 11 16 4 MEAN QNH PRESSURE IN HPA 1022.3 1022.5 1015.1 1014.7 1009.6 1003.0 999.6 1001.3 1007.4 1014.7 1020.4 1021.7 1012.7 MAX. QNH PRESSURE IN HPA 1026.3 1026.4 1026.1 1025.3 1015.9 1007.9 1002.8 1004.1 1014.0 1020.2 1024.0 1026.8 1026.8 DAY 30 8 31 1 8 1 8 26 24 28 26 18 MIN. QNH PRESSURE IN HPA 1016.4 1015.5 1005.2 1008.3 1003.5 999.0 997.0 997.8 1003.9 1008.9 1015.9 1016.3 997.0 DAY 11 22 10 23 30 30 30 1 6 11 16 4 MEAN QFF PRESSURE IN HPA 1022.7 1022.9 1015.4 1014.8 1009.7 1003.0 999.6 1001.3 1007.5 1014.9 1020.6 1022.0 1012.9 MAX. QFF PRESSURE IN HPA 1026.7 1026.8 1026.4 1025.6 1016.0 1007.9 1002.7 1004.1 1014.0 1020.4 1024.3 1027.2 1027.2 DAY 30 8 31 1 8 1 8 26 24 28 26 18 MIN. QFF PRESSURE IN HPA 1016.7 1015.8 1005.3 1008.4 1003.5 999.0 997.0 997.8 1003.9 1009.0 1016.1 1016.5 997.0 DAY 11 22 10 23 30 30 30 1 6 11 16 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1018.0 1010.8 1010.1 1005.1 998.6 995.2 996.9 1002.9 1009.6 1015.6 1017.2 1008.1 MAX. QFE PRESSURE IN HPA 1023.3 1022.1 1021.8 1020.7 1010.8 1003.2 998.5 999.6 1008.7 1015.0 1019.8 1021.6 1023.3 DAY 18 7 31 1 8 12 8 26 24 27 22 18 MIN. QFE PRESSURE IN HPA 1010.3 1008.7 1003.6 1003.0 998.9 994.3 992.2 993.0 998.9 999.6 1011.6 1010.7 992.2 DAY 11 22 10 23 30 30 31 1 5 4 16 4 MEAN QNH PRESSURE IN HPA 1021.8 1021.9 1014.7 1013.9 1009.0 1002.5 999.1 1000.7 1006.7 1013.4 1019.5 1021.1 1012.0 MAX. QNH PRESSURE IN HPA 1027.2 1026.0 1025.7 1024.6 1014.7 1007.1 1002.3 1003.5 1012.6 1018.9 1023.7 1025.5 1027.2 DAY 18 7 31 1 8 12 8 26 24 27 22 18 MIN. QNH PRESSURE IN HPA 1014.2 1012.6 1007.5 1006.9 1002.8 998.1 996.0 996.8 1002.8 1003.5 1015.5 1014.6 996.0 DAY 11 22 10 23 30 30 31 1 5 4 16 4 MEAN QFF PRESSURE IN HPA 1022.2 1022.2 1014.9 1014.1 1009.0 1002.5 999.0 1000.7 1006.7 1013.5 1019.7 1021.4 1012.1 MAX. QFF PRESSURE IN HPA 1027.6 1026.4 1026.0 1024.9 1014.8 1007.1 1002.3 1003.4 1012.6 1019.0 1024.0 1025.9 1027.6 DAY 18 7 31 1 8 12 8 26 24 27 22 18 MIN. QFF PRESSURE IN HPA 1014.5 1012.8 1007.6 1006.9 1002.7 998.1 996.0 996.8 1002.7 1003.5 1015.7 1014.8 996.0 DAY 11 22 10 23 30 30 31 1 5 4 16 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1015.8 1008.9 1008.0 1003.6 997.2 993.6 995.4 1001.2 1007.9 1014.1 1015.8 1006.5 MAX. QFE PRESSURE IN HPA 1020.6 1020.0 1019.6 1017.9 1010.8 1002.1 997.6 997.9 1006.9 1013.4 1018.9 1020.7 1020.7 DAY 18 8 31 1 8 12 8 26 29 27 22 18 MIN. QFE PRESSURE IN HPA 1007.4 1006.5 999.9 1001.1 997.4 993.0 990.5 992.2 996.7 997.8 1010.3 1011.0 990.5 DAY 11 22 15 23 30 30 30 1 5 4 6 4 MEAN QNH PRESSURE IN HPA 1020.0 1019.7 1012.8 1011.8 1007.5 1001.0 997.5 999.2 1005.0 1011.7 1018.0 1019.7 1010.3 MAX. QNH PRESSURE IN HPA 1024.5 1023.9 1023.5 1021.8 1014.7 1006.0 1001.4 1001.7 1010.8 1017.3 1022.8 1024.6 1024.6 DAY 18 8 31 1 8 12 8 26 29 27 22 18 MIN. QNH PRESSURE IN HPA 1011.3 1010.4 1003.8 1005.0 1001.2 996.8 994.3 996.0 1000.5 1001.6 1014.2 1014.9 994.3 DAY 11 22 15 23 30 30 30 1 5 4 6 4 MEAN QFF PRESSURE IN HPA 1020.3 1020.0 1013.0 1012.0 1007.5 1001.0 997.4 999.2 1005.0 1011.8 1018.2 1020.0 1010.5 MAX. QFF PRESSURE IN HPA 1024.9 1024.2 1023.8 1022.1 1014.8 1006.0 1001.4 1001.7 1010.8 1017.4 1023.1 1025.0 1025.0 DAY 18 8 31 1 8 12 8 26 29 27 22 18 MIN. QFF PRESSURE IN HPA 1011.5 1010.6 1003.9 1005.1 1001.2 996.8 994.2 996.0 1000.5 1001.7 1014.4 1015.1 994.2 DAY 11 22 15 23 30 30 30 1 5 4 6 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.2 1015.9 1008.9 1007.6 1003.2 996.5 993.0 994.9 1000.9 1008.0 1014.2 1016.2 1006.3 MAX. QFE PRESSURE IN HPA 1021.4 1020.0 1019.3 1017.3 1010.0 1001.6 997.0 998.1 1006.1 1014.5 1019.6 1021.4 1021.4 DAY 18 7 31 1 8 12 8 3 24 27 22 18 MIN. QFE PRESSURE IN HPA 1008.2 1007.8 1000.5 1000.9 996.8 992.4 990.0 992.4 995.7 997.9 1010.3 1010.9 990.0 DAY 11 22 15 23 30 30 31 1 5 4 6 12 MEAN QNH PRESSURE IN HPA 1020.1 1019.8 1012.8 1011.5 1007.0 1000.4 996.8 998.8 1004.8 1011.9 1018.1 1020.1 1010.2 MAX. QNH PRESSURE IN HPA 1025.3 1023.9 1023.2 1021.2 1013.9 1005.5 1000.8 1001.9 1010.0 1018.4 1023.5 1025.3 1025.3 DAY 18 7 31 1 8 12 8 3 24 27 22 18 MIN. QNH PRESSURE IN HPA 1012.1 1011.7 1004.4 1004.8 1000.6 996.2 993.8 996.2 999.5 1001.7 1014.2 1014.8 993.8 DAY 11 22 15 23 30 30 31 1 5 4 6 12 MEAN QFF PRESSURE IN HPA 1020.4 1020.2 1013.0 1011.7 1007.1 1000.4 996.8 998.8 1004.8 1012.1 1018.4 1020.4 1010.3 MAX. QFF PRESSURE IN HPA 1025.8 1024.3 1023.6 1021.5 1014.0 1005.5 1000.8 1001.9 1010.1 1018.5 1023.9 1025.7 1025.8 DAY 18 7 31 1 8 12 8 3 29 27 22 18 MIN. QFF PRESSURE IN HPA 1012.3 1012.0 1004.6 1004.9 1000.6 996.2 993.8 996.2 999.5 1001.8 1014.4 1015.0 993.8 DAY 11 22 15 23 30 30 31 1 5 4 6 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1017.0 1010.2 1008.9 1004.5 997.8 994.3 996.1 1002.2 1009.2 1015.0 1016.8 1007.4 MAX. QFE PRESSURE IN HPA 1022.0 1022.2 1020.6 1018.2 1011.1 1002.7 998.1 999.0 1007.7 1014.9 1020.3 1022.2 1022.2 DAY 18 7 31 1 8 12 8 31 24 27 22 18 MIN. QFE PRESSURE IN HPA 1009.6 1009.2 1004.1 1003.0 998.7 992.7 991.8 992.7 996.8 998.2 1010.7 1012.4 991.8 DAY 2 22 9 23 30 30 30 1 5 4 6 4 MEAN QNH PRESSURE IN HPA 1021.3 1020.9 1014.0 1012.8 1008.3 1001.6 998.2 1000.0 1006.0 1013.1 1018.9 1020.7 1011.3 MAX. QNH PRESSURE IN HPA 1025.9 1026.1 1024.5 1022.1 1015.0 1006.6 1001.9 1002.9 1011.6 1018.8 1024.2 1026.1 1026.1 DAY 18 7 31 1 8 12 8 31 24 27 22 18 MIN. QNH PRESSURE IN HPA 1013.5 1013.1 1008.0 1006.9 1002.6 996.5 995.6 996.5 1000.6 1002.0 1014.6 1016.3 995.6 DAY 2 22 9 23 30 30 30 1 5 4 6 4 MEAN QFF PRESSURE IN HPA 1021.7 1021.3 1014.3 1012.9 1008.4 1001.6 998.1 1000.0 1006.1 1013.2 1019.1 1021.0 1011.5 MAX. QFF PRESSURE IN HPA 1026.4 1026.5 1024.8 1022.4 1015.1 1006.6 1001.9 1002.9 1011.7 1018.9 1024.6 1026.5 1026.5 DAY 18 7 31 1 8 12 8 31 24 27 22 18 MIN. QFF PRESSURE IN HPA 1013.8 1013.4 1008.1 1006.9 1002.5 996.5 995.6 996.5 1000.6 1002.1 1014.8 1016.5 995.6 DAY 2 22 9 23 30 30 30 1 5 4 6 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1017.3 1010.4 1009.0 1004.7 998.3 994.8 996.5 1002.3 1009.2 1014.9 1016.6 1007.6 MAX. QFE PRESSURE IN HPA 1022.3 1021.6 1020.8 1017.9 1012.5 1003.3 998.2 999.1 1007.6 1015.4 1019.8 1021.4 1022.3 DAY 18 7 31 1 8 12 8 25 29 26 21 18 MIN. QFE PRESSURE IN HPA 1009.7 1010.2 1002.1 1003.0 999.3 993.5 991.7 993.5 997.5 998.9 1010.0 1012.4 991.7 DAY 2 22 9 23 29 30 30 1 5 4 6 12 MEAN QNH PRESSURE IN HPA 1021.3 1021.2 1014.2 1012.9 1008.6 1002.2 998.7 1000.3 1006.1 1013.1 1018.8 1020.6 1011.5 MAX. QNH PRESSURE IN HPA 1026.2 1025.5 1024.7 1021.8 1016.4 1007.2 1002.0 1003.0 1011.5 1019.3 1023.7 1025.3 1026.2 DAY 18 7 31 1 8 12 8 25 29 26 21 18 MIN. QNH PRESSURE IN HPA 1013.6 1014.1 1006.0 1006.9 1003.2 997.3 995.5 997.3 1001.3 1002.8 1013.9 1016.3 995.5 DAY 2 22 9 23 29 30 30 1 5 4 6 12 MEAN QFF PRESSURE IN HPA 1021.6 1021.5 1014.5 1013.0 1008.6 1002.2 998.6 1000.3 1006.1 1013.2 1019.0 1020.9 1011.6 MAX. QFF PRESSURE IN HPA 1026.6 1025.9 1025.0 1022.1 1016.5 1007.2 1002.0 1002.9 1011.6 1019.4 1024.0 1025.7 1026.6 DAY 18 7 31 1 8 12 8 25 29 26 21 18 MIN. QFF PRESSURE IN HPA 1013.9 1014.3 1006.1 1006.9 1003.2 997.3 995.4 997.3 1001.3 1002.8 1014.1 1016.5 995.4 DAY 2 22 9 23 29 30 30 1 5 4 6 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.7 13.2 18.3 24.4 32.8 35.4 37.6 35.6 31.9 26.8 20.0 14.5 25.1 MINIMUN AIR TEMPERATURE (C) 6.1 7.7 10.7 16.7 22.8 25.1 28.2 25.6 21.7 18.7 12.8 8.5 17.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 3 24 30 31 31 21 10 0 0 150 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 4 0 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS LOWEST(C) 0.0 4.0 5.0 10.0 17.0 22.0 24.0 22.0 18.0 13.0 7.0 0.6 0.0 DAY 12 27 1 6 13 21 4 28 19 18 19 28 MAXIMUM AIR TEMPERATURE (C) 15.9 19.5 26.1 32.4 42.4 45.6 47.3 45.4 42.9 36.2 29.1 22.4 33.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 20 31 30 31 31 30 31 14 0 219 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.0 24.0 32.0 38.0 48.0 48.4 50.0 50.0 46.0 41.0 33.0 28.0 50.0 DAY 1 18 31 26 20 5 18 5 6 8 3 6 DIF. BETWEEN (MAX.-MIN.) (C) 9.8 11.8 15.4 15.7 19.6 20.5 19.1 19.8 21.2 17.5 16.3 13.9 16.7 MEAN DAILY TEMP. (MDT) (C) 11.0 13.6 18.4 24.6 32.6 35.4 37.8 35.5 32.3 27.5 20.9 15.5 25.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 7.0 112.7 359.5 430.8 519.4 450.4 339.2 200.1 36.4 0.0 2455.5 HEATING DEG. DAYS(BASE 18 0C) 215.8 123.9 27.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.3 85.4 455.7 DEWPOINT (MEAN C) 6.1 7.8 5.9 8.5 7.4 10.1 15.1 13.9 13.3 15.2 8.8 6.9 9.9 MIXING RATIO (G/KG) 5.98 6.72 5.94 7.19 6.91 8.20 11.88 10.61 10.12 11.28 7.40 6.43 8.22 VAPOUR PRESSURE (HPA) 9.68 10.81 9.58 11.51 10.98 12.96 18.56 16.68 16.00 17.95 11.90 10.38 13.08 SATURATION DEF. (HPA) 3.63 4.83 12.65 21.03 42.96 48.50 49.98 45.01 34.50 19.22 12.84 7.12 25.19 RELATIVE HUMIDITY (MEAN %) 75 72 48 40 23 25 31 30 37 52 52 63 46 RELATIVE HUMIDITY (MAX. %) 89 88 71 60 37 41 46 45 61 67 71 80 63 RELATIVE HUMIDITY (MIN. %) 55 51 26 22 13 11 16 17 17 35 30 38 28 RELATIVE HUMIDITY (MEAN% 03UTC) 86 85 65 55 34 39 43 43 57 64 66 76 59 RELATIVE HUMIDITY (MEAN% 09UTC) 61 58 33 29 15 15 21 21 25 41 38 48 34 RELATIVE HUMIDITY (MEAN% 15UTC) 70 66 36 28 17 14 20 21 23 46 45 57 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 26.0 40.4 2.5 21.4 0.0 0.0 0.0 0.0 0.0 15.0 31.0 2.2 138.5 DAYS WITH PRECIPITATION >=10 1 1 0 1 0 0 0 0 0 1 1 0 5 DAYS WITH PRECIPITATION >= 5 2 4 0 1 0 0 0 0 0 1 1 0 9 DAYS WITH PRECIPITATION >= 1 4 7 1 1 0 0 0 0 0 1 1 1 16 DAYS WITH PRECIPITATION 10 7 6 1 0 0 0 0 0 1 2 2 29 GREATEST DAILY PRECIPITATION 16.0 14.0 2.2 21.4 0.0 0.0 0.0 0.0 0.0 15.0 31.0 2.2 31.0 DAY 28 4 14 3 ** ** ** ** ** 29 28 25 DAY WITH THUNDER STORM 2 5 0 1 0 0 0 0 0 1 1 0 10 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 7 6 7 5 7 14 12 11 6 1 1 2 79 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 270 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 9.4 9.2 10.5 9.7 10.9 13.2 12.3 10.3 9.8 9.6 9.9 8.6 10.6 PREVAILING WIND PERCENT 29.0 35.7 27.0 33.8 45.2 43.3 28.2 24.6 25.8 16.5 22.1 18.1 28.9 CALMS PERCENT OF WIND 45.2 32.6 31.5 25.0 20.6 17.9 21.4 30.6 29.2 54.0 62.9 65.3 36.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 297 293 288 294 316 298 271 281 282 274 305 303 293 VECTOR WIND MAGNITUDE(KNOTS) 2.5 2.4 2.3 2.6 7.6 6.6 4.8 4.3 3.1 1.6 1.3 1.7 3.3 WIND STEADINESES (MEAN %) 47.2 36.4 31.5 31.0 86.4 66.0 53.9 59.7 50.8 38.1 34.2 60.7 50.0 WIND SPEED (MEAN KNOTS) 5.3 6.6 7.3 8.4 8.8 10.0 8.9 7.2 6.1 4.2 3.8 2.8 6.6 FASTEST WIND DIRECTION 90 180 210 170 340 320 300 320 330 90 180 150 170 FASTEST WIND SPEED (KNOTS) 27 31 27 35 35 33 31 27 23 29 27 35 35 DAY 4 19 2 2 12 6 28 5 6 29 27 21 DAYS WITH SKY CLEAR (0-2)/8 15 18 20 12 27 30 26 31 30 23 21 17 270 DAYS WITH P.CLOUDY (3-6)/8 10 6 7 13 4 0 5 0 0 7 7 12 71 DAYS WITH CLOUDY (7-8)/8 6 4 4 5 0 0 0 0 0 1 2 2 24 DAYS WITH VISIBILITY =< 2 KM 4 4 2 0 1 0 2 0 0 0 0 2 15 DURATION OF SUNSHINE HOURS 173.1 190.3 227.0 251.7 327.6 350.0 331.0 331.4 290.3 248.8 233.1 214.3 3168.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.0 1013.1 1013.2 1008.1 1002.0 997.4 993.8 996.4 1000.7 1009.5 1014.0 1015.8 1006.8 MAX. QFE PRESSURE IN HPA 1025.9 1019.3 1020.2 1014.0 1008.4 1003.4 1000.5 1000.5 1006.7 1017.0 1021.5 1022.7 1025.9 DAY-HOUR 26- 6 12- 6 9- 6 8- 6 8- 6 3- 6 15- 6 29- 6 27- 6 30- 6 14- 6 28- 6 MIN. QFE PRESSURE IN HPA 1007.2 1005.2 1006.9 1001.3 995.3 990.5 989.6 991.0 994.6 1002.5 1006.2 1009.1 989.6 DAY-HOUR 4-12 15-12 31-12 29-15 30-12 30-15 18-15 13-15 5-15 1- 0 1-12 10-12 MEAN QNH PRESSURE IN HPA 1022.0 1017.0 1017.1 1012.0 1005.8 1001.3 997.6 1000.2 1004.5 1013.4 1017.9 1019.7 1010.7 MAX. QNH PRESSURE IN HPA 1029.8 1023.2 1024.1 1017.9 1012.3 1007.3 1004.4 1004.4 1010.6 1020.9 1025.4 1026.6 1029.8 DAY-HOUR 26- 6 12- 6 9- 6 8- 6 8- 6 3- 6 15- 6 29- 6 27- 6 30- 6 14- 6 28- 6 MIN. QNH PRESSURE IN HPA 1011.1 1009.1 1010.8 1005.2 999.1 994.3 993.4 994.8 998.4 1006.4 1010.1 1013.0 993.4 DAY-HOUR 4-12 15-12 31-12 29-15 30-12 30-15 18-15 13-15 5-15 1- 0 1-12 10-12 MEAN QFF PRESSURE IN HPA 1022.3 1017.3 1017.3 1012.1 1005.9 1001.2 997.6 1000.2 1004.6 1013.5 1018.1 1020.0 1010.8 MAX. QFF PRESSURE IN HPA 1030.3 1023.6 1024.4 1018.1 1012.4 1007.3 1004.3 1004.4 1010.6 1021.1 1025.7 1027.1 1030.3 DAY-HOUR 26- 6 12- 6 9- 6 8- 6 8- 6 3- 6 15- 6 29- 6 27- 6 30- 6 14- 6 28- 6 MIN. QFF PRESSURE IN HPA 1011.3 1009.3 1010.9 1005.2 999.1 994.3 993.4 994.8 998.5 1006.4 1010.2 1013.2 993.4 DAY-HOUR 4-12 15-12 31-12 29-15 30-12 30-15 18-15 13-15 5-15 1- 0 1-12 10-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1013.0 1013.1 1007.8 1001.9 997.4 993.9 996.3 1000.6 1009.2 1013.7 1015.8 1006.7 MAX. QFE PRESSURE IN HPA 1024.6 1018.9 1018.3 1012.3 1007.0 1001.8 998.6 999.6 1004.6 1015.6 1020.2 1021.2 1024.6 DAY 26 1 10 8 8 17 15 29 27 31 14 29 MIN. QFE PRESSURE IN HPA 1010.7 1006.5 1009.8 1002.7 996.3 992.4 991.3 992.5 996.7 1002.5 1006.9 1010.1 991.3 DAY 5 10 30 15 31 26 20 15 6 1 2 10 MEAN QNH PRESSURE IN HPA 1021.8 1016.9 1017.0 1011.7 1005.8 1001.3 997.8 1000.1 1004.4 1013.0 1017.6 1019.7 1010.6 MAX. QNH PRESSURE IN HPA 1028.5 1022.8 1022.2 1016.2 1010.9 1005.7 1002.4 1003.5 1008.5 1019.5 1024.1 1025.1 1028.5 DAY 26 1 10 8 8 17 15 29 27 31 14 29 MIN. QNH PRESSURE IN HPA 1014.6 1010.4 1013.7 1006.6 1000.1 996.2 995.1 996.3 1000.5 1006.4 1010.8 1014.0 995.1 DAY 5 10 30 15 31 26 20 15 6 1 2 10 MEAN QFF PRESSURE IN HPA 1022.1 1017.2 1017.2 1011.8 1005.8 1001.3 997.7 1000.1 1004.4 1013.1 1017.7 1020.0 1010.7 MAX. QFF PRESSURE IN HPA 1028.9 1023.2 1022.4 1016.4 1011.0 1005.6 1002.4 1003.4 1008.5 1019.7 1024.3 1025.5 1028.9 DAY 26 1 10 8 8 17 15 29 27 31 14 29 MIN. QFF PRESSURE IN HPA 1014.8 1010.6 1013.9 1006.7 1000.1 996.2 995.1 996.3 1000.5 1006.4 1010.9 1014.2 995.1 DAY 5 10 30 15 31 26 20 15 6 1 2 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1013.0 1013.2 1008.0 1002.4 997.8 994.2 996.7 1001.0 1009.4 1013.9 1015.7 1006.9 MAX. QFE PRESSURE IN HPA 1024.3 1019.2 1018.4 1013.2 1007.7 1002.2 999.3 1000.0 1005.0 1015.9 1020.4 1021.1 1024.3 DAY 26 1 9 4 8 17 15 29 26 30 14 28 MIN. QFE PRESSURE IN HPA 1010.8 1005.6 1010.2 1003.3 996.9 993.4 991.3 992.5 996.8 1003.5 1007.0 1010.1 991.3 DAY 4 10 24 15 30 26 5 14 4 1 2 10 MEAN QNH PRESSURE IN HPA 1021.8 1016.8 1017.1 1011.8 1006.2 1001.7 998.0 1000.6 1004.8 1013.3 1017.8 1019.6 1010.8 MAX. QNH PRESSURE IN HPA 1028.2 1023.1 1022.3 1017.1 1011.6 1006.1 1003.2 1003.9 1008.9 1019.8 1024.3 1025.0 1028.2 DAY 26 1 9 4 8 17 15 29 26 30 14 28 MIN. QNH PRESSURE IN HPA 1014.7 1009.5 1014.1 1007.2 1000.7 997.2 995.1 996.3 1000.6 1007.4 1010.9 1014.0 995.1 DAY 4 10 24 15 30 26 5 14 4 1 2 10 MEAN QFF PRESSURE IN HPA 1022.2 1017.2 1017.4 1012.0 1006.3 1001.7 998.0 1000.5 1004.9 1013.4 1018.1 1019.9 1011.0 MAX. QFF PRESSURE IN HPA 1028.7 1023.5 1022.6 1017.3 1011.7 1006.0 1003.1 1003.9 1008.9 1020.0 1024.6 1025.5 1028.7 DAY 26 1 9 4 8 17 15 29 26 30 14 28 MIN. QFF PRESSURE IN HPA 1015.0 1009.7 1014.3 1007.3 1000.8 997.2 995.1 996.3 1000.7 1007.4 1011.1 1014.3 995.1 DAY 4 10 24 15 30 26 5 14 4 1 2 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1019.5 1014.4 1014.7 1009.2 1003.4 998.6 994.9 997.6 1002.1 1010.9 1015.6 1017.2 1008.2 MAX. QFE PRESSURE IN HPA 1025.9 1019.3 1020.2 1014.0 1008.4 1003.4 1000.5 1000.5 1006.7 1017.0 1021.5 1022.7 1025.9 DAY 26 12 9 8 8 3 15 29 27 30 14 28 MIN. QFE PRESSURE IN HPA 1011.9 1007.0 1011.5 1003.8 997.5 994.3 992.3 993.4 997.1 1004.5 1008.9 1011.6 992.3 DAY 4 15 31 15 30 25 5 14 5 1 2 10 MEAN QNH PRESSURE IN HPA 1023.4 1018.3 1018.6 1013.1 1007.2 1002.5 998.8 1001.5 1006.0 1014.8 1019.5 1021.1 1012.1 MAX. QNH PRESSURE IN HPA 1029.8 1023.2 1024.1 1017.9 1012.3 1007.3 1004.4 1004.4 1010.6 1020.9 1025.4 1026.6 1029.8 DAY 26 12 9 8 8 3 15 29 27 30 14 28 MIN. QNH PRESSURE IN HPA 1015.8 1010.9 1015.4 1007.7 1001.3 998.1 996.1 997.2 1000.9 1008.4 1012.8 1015.5 996.1 DAY 4 15 31 15 30 25 5 14 5 1 2 10 MEAN QFF PRESSURE IN HPA 1023.8 1018.6 1018.8 1013.2 1007.2 1002.5 998.7 1001.5 1006.0 1014.9 1019.7 1021.5 1012.2 MAX. QFF PRESSURE IN HPA 1030.3 1023.6 1024.4 1018.1 1012.4 1007.3 1004.3 1004.4 1010.6 1021.1 1025.7 1027.1 1030.3 DAY 26 12 9 8 8 3 15 29 27 30 14 28 MIN. QFF PRESSURE IN HPA 1016.1 1011.1 1015.6 1007.8 1001.4 998.1 996.1 997.2 1001.0 1008.4 1013.0 1015.7 996.1 DAY 4 15 31 15 30 30 20 14 5 1 2 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.7 1013.9 1014.0 1008.9 1002.7 998.1 994.3 997.2 1001.4 1010.2 1014.5 1016.3 1007.5 MAX. QFE PRESSURE IN HPA 1025.2 1019.2 1020.1 1014.0 1007.7 1002.7 999.5 999.7 1005.9 1016.6 1020.5 1021.5 1025.2 DAY 11 12 9 8 7 17 15 29 27 30 14 28 MIN. QFE PRESSURE IN HPA 1011.0 1007.1 1010.2 1003.4 996.8 993.0 991.8 992.9 996.6 1004.2 1008.4 1009.1 991.8 DAY 4 15 31 15 30 30 20 14 5 1 2 21 MEAN QNH PRESSURE IN HPA 1022.7 1017.8 1017.9 1012.7 1006.6 1001.9 998.1 1001.0 1005.3 1014.1 1018.4 1020.2 1011.4 MAX. QNH PRESSURE IN HPA 1029.1 1023.1 1024.0 1017.9 1011.6 1006.6 1003.4 1003.6 1009.8 1020.5 1024.4 1025.4 1029.1 DAY 11 12 9 8 7 17 15 29 27 30 14 28 MIN. QNH PRESSURE IN HPA 1014.9 1011.0 1014.1 1007.3 1000.6 996.8 995.6 996.7 1000.4 1008.1 1012.3 1013.0 995.6 DAY 4 15 31 15 30 30 20 14 5 1 2 21 MEAN QFF PRESSURE IN HPA 1023.0 1018.1 1018.1 1012.9 1006.6 1001.9 998.1 1001.0 1005.3 1014.2 1018.6 1020.4 1011.5 MAX. QFF PRESSURE IN HPA 1029.5 1023.5 1024.2 1018.1 1011.6 1006.6 1003.3 1003.5 1009.8 1020.7 1024.7 1025.8 1029.5 DAY 11 12 9 8 7 17 15 29 27 30 14 28 MIN. QFF PRESSURE IN HPA 1015.2 1011.2 1014.3 1007.4 1000.6 996.8 995.5 996.7 1000.5 1008.1 1012.4 1013.2 995.5 DAY 4 15 31 15 30 30 20 14 5 1 2 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.9 1012.1 1012.1 1007.3 1001.1 996.6 992.8 995.5 999.7 1008.7 1012.9 1014.7 1005.9 MAX. QFE PRESSURE IN HPA 1023.9 1017.7 1018.5 1012.0 1006.5 1001.5 997.5 998.4 1004.7 1014.4 1018.5 1020.4 1023.9 DAY 11 7 9 8 7 4 15 11 27 30 14 28 MIN. QFE PRESSURE IN HPA 1007.2 1005.2 1006.9 1001.4 995.3 991.5 990.4 991.4 995.4 1003.0 1006.2 1009.1 990.4 DAY 4 15 31 29 30 30 18 14 5 1 1 10 MEAN QNH PRESSURE IN HPA 1020.9 1016.0 1016.0 1011.2 1004.9 1000.5 996.6 999.3 1003.5 1012.6 1016.8 1018.6 1009.7 MAX. QNH PRESSURE IN HPA 1027.8 1021.6 1022.4 1015.9 1010.4 1005.4 1001.3 1002.2 1008.6 1018.3 1022.4 1024.3 1027.8 DAY 11 7 9 8 7 4 15 11 27 30 14 28 MIN. QNH PRESSURE IN HPA 1011.1 1009.1 1010.8 1005.3 999.1 995.3 994.2 995.2 999.2 1006.9 1010.1 1013.0 994.2 DAY 4 15 31 29 30 30 18 14 5 1 1 10 MEAN QFF PRESSURE IN HPA 1021.2 1016.3 1016.3 1011.3 1005.0 1000.5 996.5 999.3 1003.5 1012.6 1017.0 1018.9 1009.9 MAX. QFF PRESSURE IN HPA 1028.2 1021.9 1022.6 1016.1 1010.4 1005.3 1001.3 1002.2 1008.6 1018.4 1022.6 1024.7 1028.2 DAY 11 7 9 8 7 4 15 11 27 30 14 28 MIN. QFF PRESSURE IN HPA 1011.3 1009.3 1010.9 1005.3 999.1 995.3 994.1 995.1 999.3 1006.9 1010.2 1013.2 994.1 DAY 4 15 31 29 30 30 18 14 5 1 1 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.1 1012.2 1012.0 1007.1 1000.6 996.0 992.3 994.9 999.5 1008.5 1013.4 1015.0 1005.7 MAX. QFE PRESSURE IN HPA 1023.9 1017.9 1018.3 1011.8 1005.7 1001.2 997.4 997.7 1003.7 1014.6 1019.0 1021.3 1023.9 DAY 11 7 9 4 7 4 15 31 27 30 14 28 MIN. QFE PRESSURE IN HPA 1007.7 1006.5 1007.3 1001.3 995.3 990.5 989.6 991.0 994.6 1003.3 1006.3 1009.5 989.6 DAY 4 15 31 29 30 30 18 13 5 1 1 10 MEAN QNH PRESSURE IN HPA 1021.0 1016.1 1015.9 1010.9 1004.4 999.8 996.1 998.8 1003.4 1012.4 1017.3 1018.9 1009.6 MAX. QNH PRESSURE IN HPA 1027.8 1021.8 1022.2 1015.7 1009.6 1005.1 1001.2 1001.5 1007.6 1018.5 1022.9 1025.2 1027.8 DAY 11 7 9 4 7 4 15 31 27 30 14 28 MIN. QNH PRESSURE IN HPA 1011.6 1010.4 1011.2 1005.2 999.1 994.3 993.4 994.8 998.4 1007.2 1010.2 1013.4 993.4 DAY 4 15 31 29 30 30 18 13 5 1 1 10 MEAN QFF PRESSURE IN HPA 1021.4 1016.4 1016.1 1011.1 1004.5 999.8 996.1 998.8 1003.4 1012.5 1017.5 1019.2 1009.7 MAX. QFF PRESSURE IN HPA 1028.3 1022.2 1022.5 1015.9 1009.7 1005.0 1001.2 1001.5 1007.6 1018.7 1023.2 1025.6 1028.3 DAY 11 7 9 4 7 4 15 31 27 30 14 28 MIN. QFF PRESSURE IN HPA 1011.8 1010.6 1011.4 1005.2 999.2 994.3 993.4 994.8 998.5 1007.2 1010.4 1013.6 993.4 DAY 4 15 31 29 30 30 18 13 5 1 1 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1018.1 1013.1 1013.1 1008.2 1001.8 997.2 993.7 996.2 1000.6 1009.7 1014.2 1016.0 1006.8 MAX. QFE PRESSURE IN HPA 1025.1 1018.1 1019.3 1013.5 1007.5 1003.1 998.1 999.9 1005.0 1015.5 1020.3 1022.2 1025.1 DAY 11 12 9 4 7 4 14 31 26 30 14 28 MIN. QFE PRESSURE IN HPA 1007.9 1008.8 1008.5 1003.1 996.9 991.5 991.2 992.4 996.1 1005.8 1007.7 1010.6 991.2 DAY 4 18 31 15 30 30 5 14 5 1 1 9 MEAN QNH PRESSURE IN HPA 1022.1 1017.0 1017.0 1012.0 1005.6 1001.0 997.5 1000.0 1004.4 1013.6 1018.1 1019.9 1010.7 MAX. QNH PRESSURE IN HPA 1029.0 1022.0 1023.2 1017.4 1011.4 1007.0 1001.9 1003.8 1008.9 1019.4 1024.2 1026.1 1029.0 DAY 11 12 9 4 7 4 14 31 26 30 14 28 MIN. QNH PRESSURE IN HPA 1011.8 1012.7 1012.4 1007.0 1000.7 995.3 995.0 996.2 999.9 1009.7 1011.6 1014.5 995.0 DAY 4 18 31 15 30 30 5 14 5 1 1 9 MEAN QFF PRESSURE IN HPA 1022.4 1017.3 1017.3 1012.2 1005.7 1001.0 997.5 1000.0 1004.5 1013.7 1018.4 1020.2 1010.8 MAX. QFF PRESSURE IN HPA 1029.5 1022.4 1023.5 1017.6 1011.5 1006.9 1001.9 1003.7 1008.9 1019.6 1024.5 1026.6 1029.5 DAY 11 12 9 4 7 4 14 31 26 30 14 28 MIN. QFF PRESSURE IN HPA 1012.0 1013.0 1012.5 1007.0 1000.8 995.3 995.0 996.2 1000.0 1009.7 1011.8 1014.7 995.0 DAY 4 18 31 29 30 30 5 14 5 1 1 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1018.3 1013.4 1013.2 1008.4 1002.2 997.7 994.4 996.7 1000.9 1009.6 1014.2 1016.2 1007.1 MAX. QFE PRESSURE IN HPA 1024.7 1018.6 1019.3 1013.5 1007.6 1002.5 999.0 1000.1 1004.8 1016.2 1020.5 1022.2 1024.7 DAY 11 7 9 4 7 4 14 31 27 30 13 28 MIN. QFE PRESSURE IN HPA 1009.6 1006.8 1008.0 1003.2 996.7 991.9 991.6 992.4 996.7 1004.6 1006.9 1010.4 991.6 DAY 4 9 31 15 30 30 19 13 5 13 1 9 MEAN QNH PRESSURE IN HPA 1022.2 1017.3 1017.1 1012.3 1006.0 1001.5 998.2 1000.5 1004.7 1013.5 1018.1 1020.1 1011.0 MAX. QNH PRESSURE IN HPA 1028.6 1022.5 1023.2 1017.4 1011.5 1006.4 1002.9 1004.0 1008.7 1020.1 1024.4 1026.1 1028.6 DAY 11 7 9 4 7 4 14 31 27 30 13 28 MIN. QNH PRESSURE IN HPA 1013.5 1010.7 1011.9 1007.1 1000.5 995.7 995.4 996.2 1000.5 1008.5 1010.8 1014.3 995.4 DAY 4 9 31 15 30 30 19 13 5 13 1 9 MEAN QFF PRESSURE IN HPA 1022.5 1017.6 1017.3 1012.4 1006.1 1001.5 998.1 1000.5 1004.8 1013.5 1018.3 1020.3 1011.1 MAX. QFF PRESSURE IN HPA 1029.0 1022.9 1023.4 1017.6 1011.6 1006.3 1002.8 1003.9 1008.7 1020.3 1024.7 1026.5 1029.0 DAY 11 11 9 4 7 4 14 31 27 30 13 28 MIN. QFF PRESSURE IN HPA 1013.7 1010.9 1012.0 1007.2 1000.5 995.7 995.3 996.2 1000.6 1008.5 1010.9 1014.5 995.3 DAY 4 9 31 15 30 30 19 13 5 13 1 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.0 12.8 17.5 25.5 29.5 35.0 36.2 35.7 31.7 25.9 19.9 13.8 24.6 MINIMUN AIR TEMPERATURE (C) 7.8 7.4 12.5 17.4 20.3 24.8 26.5 26.6 22.9 19.1 13.1 9.9 17.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 3 11 27 31 29 23 7 0 0 131 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 2 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS LOWEST(C) 3.0 0.0 7.0 12.0 16.0 19.0 24.0 22.0 18.0 16.0 8.0 3.0 0.0 DAY 28 11 8 13 4 1 9 28 27 24 27 18 MAXIMUM AIR TEMPERATURE (C) 16.6 19.2 23.7 34.2 38.5 44.7 46.0 45.1 41.3 34.4 28.1 18.8 32.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 27 31 29 31 31 30 28 6 0 214 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 24.0 30.0 41.0 42.0 48.0 48.0 48.0 45.0 40.0 35.0 24.0 48.0 DAY 31 16 31 24 2 23 5 9 1 12 1 3 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 11.8 11.2 16.8 18.2 19.9 19.5 18.5 18.4 15.3 15.0 8.9 15.1 MEAN DAILY TEMP. (MDT) (C) 12.2 13.3 18.1 25.8 29.4 34.7 36.2 35.8 32.1 26.8 20.6 14.3 25.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 7.0 144.8 260.8 398.0 472.4 431.8 313.6 178.5 28.9 0.0 2235.8 HEATING DEG. DAYS(BASE 18 0C) 178.9 133.0 37.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.2 122.3 477.3 DEWPOINT (MEAN C) 9.1 6.2 11.9 11.9 9.9 13.7 17.2 16.1 15.6 14.6 8.7 10.2 12.1 MIXING RATIO (G/KG) 7.35 6.25 8.83 8.88 7.98 10.46 13.17 12.41 12.20 10.84 7.27 8.01 9.47 VAPOUR PRESSURE (HPA) 11.86 10.09 14.14 14.17 12.71 16.47 20.55 19.42 19.22 17.27 11.70 12.89 15.04 SATURATION DEF. (HPA) 2.57 5.33 6.70 20.48 30.91 43.35 42.84 42.18 30.06 17.71 12.84 3.52 21.54 RELATIVE HUMIDITY (MEAN %) 84 67 72 46 33 31 35 34 43 54 51 81 53 RELATIVE HUMIDITY (MAX. %) 94 85 89 67 50 47 54 51 65 75 71 92 70 RELATIVE HUMIDITY (MIN. %) 68 43 49 25 19 17 21 20 25 32 30 65 35 RELATIVE HUMIDITY (MEAN% 03UTC) 91 81 85 64 47 43 50 48 58 71 66 87 66 RELATIVE HUMIDITY (MEAN% 09UTC) 74 56 58 31 23 21 29 30 33 41 39 71 42 RELATIVE HUMIDITY (MEAN% 15UTC) 82 59 63 32 22 22 26 24 32 46 44 80 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 67.1 65.2 102.3 0.2 0.0 0.0 0.0 0.0 0.0 64.4 7.0 71.3 377.5 DAYS WITH PRECIPITATION >=10 2 2 2 0 0 0 0 0 0 4 0 1 11 DAYS WITH PRECIPITATION >= 5 8 3 6 0 0 0 0 0 0 4 1 7 29 DAYS WITH PRECIPITATION >= 1 9 6 6 0 0 0 0 0 0 6 1 12 40 DAYS WITH PRECIPITATION 11 8 7 1 0 0 0 0 0 7 2 13 49 GREATEST DAILY PRECIPITATION 12.5 37.0 42.0 0.2 0.0 0.0 0.0 0.0 0.0 18.3 7.0 23.0 42.0 DAY 2 20 6 5 ** ** ** ** ** 1 30 22 DAY WITH THUNDER STORM 2 5 2 3 0 0 0 0 1 9 1 12 35 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 6 4 11 19 12 20 21 18 3 5 4 123 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.8 9.4 9.7 11.2 12.0 11.7 11.6 10.6 10.8 9.9 8.7 8.1 10.5 PREVAILING WIND PERCENT 23.0 28.6 15.7 37.1 42.7 33.8 25.4 27.8 18.8 25.0 10.0 19.8 25.6 CALMS PERCENT OF WIND 57.7 43.8 54.8 35.4 38.3 37.9 50.0 45.6 46.3 52.4 71.7 50.0 48.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 313 303 291 307 304 297 292 293 257 319 213 200 297 VECTOR WIND MAGNITUDE(KNOTS) 1.5 2.3 1.2 3.8 6.0 4.2 4.3 4.3 1.8 2.7 0.7 0.5 2.6 WIND STEADINESES (MEAN %) 39.5 43.4 25.0 51.4 84.5 60.0 81.1 75.4 33.3 55.1 26.9 10.2 49.1 WIND SPEED (MEAN KNOTS) 3.8 5.3 4.8 7.4 7.1 7.0 5.3 5.7 5.4 4.9 2.6 4.9 5.3 FASTEST WIND DIRECTION 280 80 300 160 310 310 320 300 330 360 160 160 300 FASTEST WIND SPEED (KNOTS) 27 23 39 31 27 25 25 25 25 39 29 35 39 DAY 14 20 15 4 2 11 25 27 22 1 4 12 DAYS WITH SKY CLEAR (0-2)/8 4 13 16 10 18 28 31 31 29 20 20 10 230 DAYS WITH P.CLOUDY (3-6)/8 14 9 7 15 11 2 0 0 1 5 9 7 80 DAYS WITH CLOUDY (7-8)/8 13 6 8 5 2 0 0 0 0 6 1 14 55 DAYS WITH VISIBILITY =< 2 KM 16 3 3 2 7 1 3 2 4 1 0 7 49 DURATION OF SUNSHINE HOURS 91.7 140.5 193.8 210.7 272.3 277.9 297.4 290.8 249.4 195.0 209.9 100.5 2529.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.0 1015.7 1010.8 1008.0 1004.2 997.3 993.7 995.7 1002.8 1009.7 1014.5 1015.1 1007.0 MAX. QFE PRESSURE IN HPA 1024.9 1025.2 1018.5 1014.2 1008.2 1004.6 1000.5 1001.1 1009.7 1016.1 1019.9 1021.6 1025.2 DAY-HOUR 28- 6 15- 9 8- 6 13- 6 24- 6 1- 6 2- 6 31- 6 29- 6 18- 6 27- 6 17- 0 MIN. QFE PRESSURE IN HPA 1008.3 1005.4 1003.0 1002.5 998.9 989.3 988.8 990.4 996.3 1003.0 1007.4 1007.0 988.8 DAY-HOUR 25-12 20-21 23-18 29-15 16-18 19-15 13-15 1-15 3-15 14-15 4-12 4-12 MEAN QNH PRESSURE IN HPA 1019.9 1019.6 1014.6 1011.8 1008.0 1001.1 997.6 999.6 1006.7 1013.6 1018.4 1019.0 1010.8 MAX. QNH PRESSURE IN HPA 1028.8 1029.1 1022.4 1018.1 1012.1 1008.5 1004.4 1005.0 1013.6 1020.0 1023.8 1025.5 1029.1 DAY-HOUR 28- 6 15- 9 8- 6 13- 6 24- 6 1- 6 2- 6 31- 6 29- 6 18- 6 27- 6 17- 0 MIN. QNH PRESSURE IN HPA 1012.2 1009.3 1006.9 1006.4 1002.8 993.1 992.6 994.2 1000.1 1006.9 1011.3 1010.9 992.6 DAY-HOUR 25-12 20-21 23-18 29-15 16-18 19-15 13-15 1-15 3-15 14-15 4-12 4-12 MEAN QFF PRESSURE IN HPA 1020.2 1020.0 1014.9 1012.0 1008.1 1001.1 997.5 999.5 1006.7 1013.7 1018.6 1019.3 1011.0 MAX. QFF PRESSURE IN HPA 1029.2 1029.5 1022.7 1018.3 1012.2 1008.5 1004.3 1005.0 1013.6 1020.1 1024.1 1025.9 1029.5 DAY-HOUR 28- 6 15- 9 8- 6 13- 6 24- 6 1- 6 2- 6 31- 6 29- 6 18- 6 27- 6 17- 3 MIN. QFF PRESSURE IN HPA 1012.5 1009.6 1007.0 1006.4 1002.8 993.1 992.6 994.2 1000.1 1006.9 1011.4 1011.1 992.6 DAY-HOUR 25-12 20-21 23-18 29-15 16-18 19-15 13-15 1-15 3-15 14-18 4-12 4-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1015.5 1010.4 1007.9 1004.0 997.5 993.7 996.0 1002.5 1009.4 1014.4 1015.1 1006.9 MAX. QFE PRESSURE IN HPA 1023.5 1024.0 1017.0 1013.2 1006.1 1003.1 998.3 999.4 1008.4 1013.3 1018.8 1021.6 1024.0 DAY 28 16 8 19 9 1 2 31 29 18 27 17 MIN. QFE PRESSURE IN HPA 1010.5 1006.6 1003.6 1003.0 1000.3 991.3 990.2 992.5 998.4 1004.2 1010.0 1009.2 990.2 DAY 25 21 6 28 28 19 14 11 3 15 4 22 MEAN QNH PRESSURE IN HPA 1020.0 1019.4 1014.3 1011.8 1007.9 1001.3 997.5 999.8 1006.4 1013.3 1018.3 1019.0 1010.7 MAX. QNH PRESSURE IN HPA 1027.4 1027.9 1020.9 1017.1 1010.0 1007.0 1002.1 1003.3 1012.3 1017.2 1022.7 1025.5 1027.9 DAY 28 16 8 19 9 1 2 31 29 18 27 17 MIN. QNH PRESSURE IN HPA 1014.4 1010.5 1007.5 1006.9 1004.2 995.1 994.0 996.3 1002.2 1008.1 1013.9 1013.1 994.0 DAY 25 21 6 28 28 19 14 11 3 15 4 22 MEAN QFF PRESSURE IN HPA 1020.3 1019.7 1014.5 1011.9 1007.9 1001.3 997.4 999.8 1006.4 1013.4 1018.5 1019.3 1010.9 MAX. QFF PRESSURE IN HPA 1027.8 1028.2 1021.2 1017.2 1010.1 1007.0 1002.1 1003.3 1012.3 1017.3 1023.0 1025.9 1028.2 DAY 28 16 8 19 25 1 2 31 29 18 27 17 MIN. QFF PRESSURE IN HPA 1014.7 1010.8 1007.7 1006.9 1004.2 995.1 994.0 996.3 1002.2 1008.1 1014.0 1013.3 994.0 DAY 25 21 6 28 28 19 14 11 3 15 4 22 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1015.8 1015.8 1010.9 1008.3 1004.5 997.9 994.5 996.2 1003.3 1009.7 1014.5 1014.9 1007.2 MAX. QFE PRESSURE IN HPA 1023.2 1024.3 1017.0 1013.3 1007.0 1003.6 999.7 1000.1 1008.6 1013.7 1019.1 1021.6 1024.3 DAY 28 16 8 14 24 1 2 31 29 18 27 17 MIN. QFE PRESSURE IN HPA 1010.1 1008.5 1004.7 1003.8 1000.8 991.3 991.2 992.6 998.5 1004.3 1009.1 1009.4 991.2 DAY 25 28 23 28 28 19 14 1 3 14 4 22 MEAN QNH PRESSURE IN HPA 1019.7 1019.7 1014.7 1012.2 1008.3 1001.7 998.3 1000.0 1007.2 1013.6 1018.4 1018.8 1011.1 MAX. QNH PRESSURE IN HPA 1027.1 1028.2 1020.9 1017.2 1010.9 1007.5 1003.6 1004.0 1012.5 1017.6 1023.0 1025.5 1028.2 DAY 28 16 8 14 24 1 2 31 29 18 27 17 MIN. QNH PRESSURE IN HPA 1014.0 1012.4 1008.6 1007.7 1004.7 995.1 995.0 996.4 1002.3 1008.2 1013.0 1013.3 995.0 DAY 25 28 23 28 28 19 14 1 3 14 4 22 MEAN QFF PRESSURE IN HPA 1020.1 1020.0 1015.0 1012.3 1008.4 1001.7 998.3 1000.0 1007.2 1013.8 1018.7 1019.1 1011.2 MAX. QFF PRESSURE IN HPA 1027.5 1028.6 1021.2 1017.4 1011.0 1007.5 1003.5 1004.0 1012.6 1017.7 1023.3 1025.9 1028.6 DAY 28 16 8 14 24 1 2 31 29 18 27 17 MIN. QFF PRESSURE IN HPA 1014.3 1012.6 1008.7 1007.7 1004.7 995.1 995.0 996.4 1002.3 1008.3 1013.1 1013.6 995.0 DAY 25 28 23 28 28 19 14 1 3 14 4 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.3 1017.2 1012.5 1009.6 1005.6 998.6 995.2 997.1 1004.4 1011.3 1016.1 1016.3 1008.5 MAX. QFE PRESSURE IN HPA 1024.9 1024.9 1018.5 1014.2 1008.2 1004.6 1000.5 1001.1 1009.7 1016.1 1019.9 1020.8 1024.9 DAY 28 15 8 13 24 1 2 31 29 18 27 17 MIN. QFE PRESSURE IN HPA 1010.8 1009.1 1006.4 1004.7 1001.5 992.0 991.8 993.7 999.3 1006.5 1010.4 1010.7 991.8 DAY 25 28 24 28 27 19 14 1 3 14 4 1 MEAN QNH PRESSURE IN HPA 1021.2 1021.1 1016.4 1013.5 1009.5 1002.5 999.1 1001.0 1008.3 1015.2 1020.0 1020.2 1012.3 MAX. QNH PRESSURE IN HPA 1028.8 1028.8 1022.4 1018.1 1012.1 1008.5 1004.4 1005.0 1013.6 1020.0 1023.8 1024.7 1028.8 DAY 28 15 8 13 24 1 2 31 29 18 27 17 MIN. QNH PRESSURE IN HPA 1014.7 1013.0 1010.3 1008.6 1005.4 995.8 995.6 997.5 1003.2 1010.4 1014.3 1014.6 995.6 DAY 25 28 24 28 27 19 14 1 3 14 4 1 MEAN QFF PRESSURE IN HPA 1021.5 1021.5 1016.7 1013.7 1009.6 1002.5 999.0 1000.9 1008.3 1015.4 1020.3 1020.5 1012.5 MAX. QFF PRESSURE IN HPA 1029.2 1029.2 1022.7 1018.3 1012.2 1008.5 1004.3 1005.0 1013.6 1020.1 1024.1 1025.1 1029.2 DAY 28 15 8 13 24 1 2 31 29 18 27 17 MIN. QFF PRESSURE IN HPA 1015.0 1013.2 1010.5 1008.6 1005.4 995.8 995.6 997.5 1003.2 1010.4 1014.4 1014.8 995.6 DAY 25 28 24 28 27 19 14 1 3 14 4 1 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1016.3 1016.5 1011.9 1008.8 1005.1 998.0 994.6 996.4 1003.5 1010.4 1015.0 1015.3 1007.7 MAX. QFE PRESSURE IN HPA 1024.0 1025.2 1018.1 1013.5 1007.9 1003.2 999.5 1000.6 1008.6 1014.2 1019.0 1020.4 1025.2 DAY 28 15 8 14 24 1 2 31 29 18 27 29 MIN. QFE PRESSURE IN HPA 1010.3 1008.7 1003.4 1004.2 1001.3 991.1 991.4 992.5 998.4 1005.4 1009.3 1007.6 991.1 DAY 25 28 23 9 28 19 14 1 3 14 4 25 MEAN QNH PRESSURE IN HPA 1020.2 1020.5 1015.8 1012.7 1009.0 1001.9 998.5 1000.2 1007.4 1014.3 1018.9 1019.2 1011.5 MAX. QNH PRESSURE IN HPA 1027.9 1029.1 1022.0 1017.4 1011.8 1007.1 1003.4 1004.5 1012.5 1018.1 1022.9 1024.3 1029.1 DAY 28 15 8 14 24 1 2 31 29 18 27 29 MIN. QNH PRESSURE IN HPA 1014.2 1012.6 1007.3 1008.1 1005.2 994.9 995.2 996.3 1002.2 1009.3 1013.2 1011.5 994.9 DAY 25 28 23 9 28 19 14 1 3 14 4 25 MEAN QFF PRESSURE IN HPA 1020.6 1020.8 1016.0 1012.8 1009.0 1001.9 998.4 1000.2 1007.4 1014.3 1019.1 1019.5 1011.7 MAX. QFF PRESSURE IN HPA 1028.3 1029.5 1022.3 1017.6 1011.9 1007.1 1003.3 1004.5 1012.5 1018.2 1023.1 1024.6 1029.5 DAY 28 15 8 14 24 1 2 31 29 19 27 29 MIN. QFF PRESSURE IN HPA 1014.5 1012.8 1007.4 1008.1 1005.2 994.9 995.2 996.3 1002.2 1009.3 1013.3 1011.8 994.9 DAY 25 28 23 28 28 19 14 1 3 14 4 25 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.9 1014.6 1009.9 1007.2 1003.4 996.4 992.9 994.5 1001.5 1008.9 1013.5 1014.0 1006.0 MAX. QFE PRESSURE IN HPA 1021.8 1023.3 1015.4 1012.3 1006.3 1001.3 997.5 998.9 1006.2 1012.2 1017.2 1019.1 1023.3 DAY 28 15 8 14 24 22 2 30 28 19 26 29 MIN. QFE PRESSURE IN HPA 1008.3 1006.4 1003.5 1003.2 999.5 989.8 990.0 990.6 996.5 1003.6 1007.4 1007.0 989.8 DAY 25 28 24 27 27 19 13 1 3 14 4 4 MEAN QNH PRESSURE IN HPA 1018.8 1018.5 1013.7 1011.0 1007.3 1000.2 996.7 998.3 1005.4 1012.7 1017.4 1017.9 1009.8 MAX. QNH PRESSURE IN HPA 1025.7 1027.2 1019.3 1016.2 1010.2 1005.2 1001.3 1002.8 1010.1 1016.1 1021.1 1023.0 1027.2 DAY 28 15 8 14 24 22 2 30 28 19 26 29 MIN. QNH PRESSURE IN HPA 1012.2 1010.3 1007.4 1007.1 1003.4 993.6 993.8 994.4 1000.3 1007.5 1011.3 1010.9 993.6 DAY 25 28 24 27 27 19 13 1 3 14 4 4 MEAN QFF PRESSURE IN HPA 1019.1 1018.8 1014.0 1011.2 1007.3 1000.2 996.7 998.3 1005.4 1012.8 1017.6 1018.2 1009.9 MAX. QFF PRESSURE IN HPA 1026.1 1027.5 1019.6 1016.4 1010.3 1005.1 1001.3 1002.7 1010.1 1016.2 1021.4 1023.3 1027.5 DAY 28 15 8 14 24 22 2 30 28 19 26 29 MIN. QFF PRESSURE IN HPA 1012.5 1010.5 1007.5 1007.1 1003.4 993.6 993.8 994.3 1000.3 1007.5 1011.4 1011.1 993.6 DAY 25 28 24 27 27 19 13 1 3 14 4 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.2 1014.7 1009.7 1006.6 1002.7 995.7 992.1 994.0 1001.4 1009.0 1013.6 1014.5 1005.8 MAX. QFE PRESSURE IN HPA 1022.0 1023.2 1015.3 1011.8 1006.0 1000.5 996.6 998.5 1007.5 1013.8 1018.1 1019.4 1023.2 DAY 28 15 8 13 8 22 2 30 29 19 26 29 MIN. QFE PRESSURE IN HPA 1008.4 1007.2 1003.6 1002.5 999.1 989.3 988.8 990.4 996.3 1003.0 1007.6 1008.6 988.8 DAY 31 28 24 29 27 19 13 1 3 14 4 4 MEAN QNH PRESSURE IN HPA 1019.1 1018.6 1013.6 1010.5 1006.6 999.5 995.9 997.8 1005.2 1012.8 1017.5 1018.4 1009.6 MAX. QNH PRESSURE IN HPA 1025.9 1027.1 1019.2 1015.7 1009.9 1004.4 1000.4 1002.3 1011.4 1017.7 1022.0 1023.3 1027.1 DAY 28 15 8 13 8 22 2 30 29 19 26 29 MIN. QNH PRESSURE IN HPA 1012.3 1011.1 1007.5 1006.4 1003.0 993.1 992.6 994.2 1000.1 1006.9 1011.5 1012.5 992.6 DAY 31 28 24 29 27 19 13 1 3 14 4 4 MEAN QFF PRESSURE IN HPA 1019.5 1018.9 1013.9 1010.6 1006.6 999.5 995.9 997.8 1005.3 1013.0 1017.8 1018.7 1009.8 MAX. QFF PRESSURE IN HPA 1026.3 1027.5 1019.5 1015.9 1010.0 1004.4 1000.4 1002.4 1011.4 1017.9 1022.3 1023.7 1027.5 DAY 28 15 8 13 8 22 2 30 29 19 26 29 MIN. QFF PRESSURE IN HPA 1012.6 1011.3 1007.7 1006.4 1003.0 993.1 992.6 994.2 1000.1 1007.0 1011.6 1012.7 992.6 DAY 31 28 24 29 27 19 13 1 3 14 4 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1015.8 1010.5 1007.5 1003.7 996.9 993.2 995.5 1002.8 1009.7 1014.6 1015.5 1006.8 MAX. QFE PRESSURE IN HPA 1023.5 1023.7 1016.3 1013.4 1006.6 1001.7 998.0 999.6 1008.4 1013.8 1019.2 1021.0 1023.7 DAY 27 15 7 13 8 22 2 30 28 19 26 29 MIN. QFE PRESSURE IN HPA 1008.8 1006.9 1003.0 1003.1 998.9 991.3 990.2 992.1 998.5 1003.0 1010.4 1010.3 990.2 DAY 31 20 23 28 16 18 13 1 3 14 3 21 MEAN QNH PRESSURE IN HPA 1020.0 1019.7 1014.4 1011.4 1007.5 1000.8 997.0 999.4 1006.6 1013.6 1018.5 1019.4 1010.7 MAX. QNH PRESSURE IN HPA 1027.4 1027.6 1020.2 1017.3 1010.5 1005.6 1001.8 1003.5 1012.3 1017.7 1023.1 1024.9 1027.6 DAY 27 15 7 13 8 22 2 30 28 19 26 29 MIN. QNH PRESSURE IN HPA 1012.7 1010.8 1006.9 1007.0 1002.8 995.1 994.0 995.9 1002.3 1006.9 1014.3 1014.2 994.0 DAY 31 20 23 28 16 18 13 1 3 14 3 21 MEAN QFF PRESSURE IN HPA 1020.3 1020.1 1014.6 1011.5 1007.6 1000.8 997.0 999.4 1006.7 1013.7 1018.7 1019.7 1010.8 MAX. QFF PRESSURE IN HPA 1027.8 1028.0 1020.5 1017.5 1010.5 1005.6 1001.9 1003.5 1012.3 1017.8 1023.4 1025.3 1028.0 DAY 27 15 7 13 8 22 2 30 28 19 26 29 MIN. QFF PRESSURE IN HPA 1013.0 1011.1 1007.0 1007.1 1002.8 995.1 994.0 995.9 1002.4 1006.9 1014.4 1014.5 994.0 DAY 31 20 23 28 16 18 13 1 3 14 4 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1015.9 1010.5 1008.0 1004.4 997.6 993.7 996.2 1003.1 1009.6 1014.6 1015.7 1007.1 MAX. QFE PRESSURE IN HPA 1024.0 1024.0 1017.0 1013.8 1007.0 1002.0 997.9 999.8 1008.6 1013.6 1019.6 1021.0 1024.0 DAY 27 15 7 18 24 22 1 30 29 18 26 29 MIN. QFE PRESSURE IN HPA 1010.0 1005.4 1004.4 1003.4 1000.2 992.0 990.2 992.4 998.9 1004.2 1010.4 1009.8 990.2 DAY 31 20 23 28 27 18 13 1 2 14 30 21 MEAN QNH PRESSURE IN HPA 1020.0 1019.8 1014.4 1011.9 1008.2 1001.4 997.6 1000.1 1006.9 1013.5 1018.5 1019.6 1011.0 MAX. QNH PRESSURE IN HPA 1027.9 1027.9 1020.9 1017.7 1010.9 1005.9 1001.7 1003.7 1012.5 1017.5 1023.5 1024.9 1027.9 DAY 27 15 7 18 24 22 1 30 29 18 26 29 MIN. QNH PRESSURE IN HPA 1013.9 1009.3 1008.3 1007.3 1004.1 995.8 994.0 996.2 1002.8 1008.1 1014.3 1013.7 994.0 DAY 31 20 23 28 27 18 13 1 2 14 30 21 MEAN QFF PRESSURE IN HPA 1020.3 1020.1 1014.6 1012.0 1008.3 1001.4 997.5 1000.1 1007.0 1013.6 1018.7 1019.9 1011.1 MAX. QFF PRESSURE IN HPA 1028.3 1028.3 1021.2 1017.8 1011.0 1005.9 1001.7 1003.7 1012.5 1017.6 1023.7 1025.2 1028.3 DAY 27 15 7 18 24 22 1 30 29 18 26 29 MIN. QFF PRESSURE IN HPA 1014.1 1009.6 1008.4 1007.3 1004.1 995.8 994.0 996.2 1002.7 1008.1 1014.5 1013.9 994.0 DAY 31 20 23 28 27 18 13 1 2 14 30 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1992 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 OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.5 13.5 17.8 23.9 30.6 35.1 37.6 36.7 33.2 27.6 18.8 14.8 25.0 MINIMUN AIR TEMPERATURE (C) 5.9 8.7 11.7 16.9 22.0 24.3 27.1 26.9 23.6 18.7 12.1 7.3 17.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 3 25 30 31 31 26 1 2 0 149 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) 1.0 2.0 4.0 10.0 17.0 21.0 22.6 23.6 17.8 17.0 2.0 2.0 1.0 DAY 18 17 14 14 1 22 7 19 29 16 30 1 MAXIMUM AIR TEMPERATURE (C) 15.5 18.8 24.0 31.2 38.3 44.5 47.0 46.3 43.0 36.8 27.0 23.1 33.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 18 31 30 31 31 30 31 6 0 210 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.0 24.2 32.0 38.0 44.0 49.0 50.0 49.4 48.0 42.0 33.0 27.0 50.0 DAY 29 28 31 20 18 28 16 10 1 2 2 11 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 10.1 12.3 14.3 16.3 20.2 19.9 19.4 19.4 18.1 14.9 15.8 15.9 MEAN DAILY TEMP. (MDT) (C) 10.7 13.8 17.8 24.1 30.2 34.4 37.0 36.6 33.3 27.8 19.5 15.2 25.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 4.2 94.8 284.7 402.6 496.5 482.3 369.6 209.7 31.7 0.0 2376.1 HEATING DEG. DAYS(BASE 18 0C) 226.2 118.5 44.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30.9 89.4 509.1 DEWPOINT (MEAN C) 7.8 10.9 13.2 10.7 12.6 12.1 16.2 16.6 18.2 12.8 8.7 6.0 12.1 MIXING RATIO (G/KG) 6.74 8.33 9.88 8.26 9.37 9.66 13.03 12.92 13.96 9.59 7.57 5.94 9.60 VAPOUR PRESSURE (HPA) 10.90 13.40 15.79 13.22 14.90 15.22 20.31 20.21 21.93 15.31 12.16 9.62 15.25 SATURATION DEF. (HPA) 2.24 2.60 5.61 17.89 31.45 45.23 48.30 45.39 32.01 23.87 11.10 8.10 22.82 RELATIVE HUMIDITY (MEAN %) 85 85 77 47 36 28 33 34 45 43 55 59 52 RELATIVE HUMIDITY (MAX. %) 95 96 92 73 57 49 55 56 68 64 74 83 72 RELATIVE HUMIDITY (MIN. %) 68 69 59 26 21 14 19 19 25 26 33 33 34 RELATIVE HUMIDITY (MEAN% 03UTC) 94 94 89 70 56 44 51 52 60 58 68 79 68 RELATIVE HUMIDITY (MEAN% 09UTC) 77 76 65 33 25 20 23 24 34 31 40 44 41 RELATIVE HUMIDITY (MEAN% 15UTC) 80 79 70 33 27 18 23 24 33 35 48 51 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.0 105.5 22.6 27.0 1.0 0.0 0.0 0.0 0.0 3.0 13.8 3.3 221.2 DAYS WITH PRECIPITATION >=10 2 3 0 1 0 0 0 0 0 0 1 0 7 DAYS WITH PRECIPITATION >= 5 4 7 1 1 0 0 0 0 0 0 1 0 14 DAYS WITH PRECIPITATION >= 1 6 8 7 3 1 0 0 0 0 1 2 1 29 DAYS WITH PRECIPITATION 7 8 8 6 3 0 0 0 0 2 4 1 39 GREATEST DAILY PRECIPITATION 16.0 32.0 8.0 24.0 1.0 0.0 0.0 0.0 0.0 3.0 11.0 3.3 32.0 DAY 8 22 9 27 6 ** ** ** ** 28 27 15 DAY WITH THUNDER STORM 0 2 4 2 1 0 0 0 0 4 3 1 17 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 2 5 3 19 14 9 10 6 3 5 0 78 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 270 315 270 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 9.9 11.9 10.4 11.8 12.5 12.3 11.5 10.8 10.1 10.2 10.0 9.4 11.1 PREVAILING WIND PERCENT 26.6 18.8 20.2 25.0 45.2 45.8 19.8 26.6 18.3 23.4 31.3 28.6 27.2 CALMS PERCENT OF WIND 52.8 47.3 42.7 34.6 23.4 21.3 38.3 49.6 38.3 42.7 31.7 51.6 39.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 309 243 266 303 312 299 270 289 261 295 314 306 294 VECTOR WIND MAGNITUDE(KNOTS) 2.7 1.3 0.8 2.1 6.5 7.0 4.0 4.0 2.8 2.8 2.4 2.7 3.1 WIND STEADINESES (MEAN %) 57.4 21.7 12.1 26.6 67.7 77.8 57.1 76.9 47.5 51.9 31.6 61.4 47.0 WIND SPEED (MEAN KNOTS) 4.7 6.0 6.6 7.9 9.6 9.0 7.0 5.2 5.9 5.4 7.6 4.4 6.6 FASTEST WIND DIRECTION 150 160 300 180 170 330 310 330 170 270 160 160 300 FASTEST WIND SPEED (KNOTS) 17 35 37 31 31 31 37 25 17 29 33 25 37 DAY 8 2 9 26 2 6 12 12 3 25 12 8 DAYS WITH SKY CLEAR (0-2)/8 14 13 13 13 14 29 28 31 30 20 18 16 239 DAYS WITH P.CLOUDY (3-6)/8 7 6 11 10 10 1 3 0 0 8 6 11 73 DAYS WITH CLOUDY (7-8)/8 10 9 7 7 7 0 0 0 0 3 6 4 53 DAYS WITH VISIBILITY =< 2 KM 8 1 1 0 3 1 2 0 2 0 1 1 20 DURATION OF SUNSHINE HOURS 129.9 161.3 180.3 228.7 231.5 354.2 342.1 330.3 276.0 240.8 171.4 196.2 2842.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.9 1015.7 1012.1 1009.4 1005.0 998.3 994.2 997.4 1001.3 1010.4 1013.8 1016.6 1007.7 MAX. QFE PRESSURE IN HPA 1025.3 1026.0 1018.1 1015.5 1012.2 1004.4 998.8 1003.3 1007.7 1016.7 1020.9 1023.9 1026.0 DAY-HOUR 27- 6 7-21 22-21 4- 6 14-21 5- 6 25- 6 26- 6 30- 6 30- 6 30- 6 26- 6 MIN. QFE PRESSURE IN HPA 1006.0 1004.4 1003.4 1001.7 996.1 992.9 989.8 992.9 994.7 1003.3 1006.4 1012.2 989.8 DAY-HOUR 8-12 3- 3 5-15 26-21 30-15 14-15 10-15 4-15 1-15 3-15 10-12 4-12 MEAN QNH PRESSURE IN HPA 1021.8 1019.6 1016.0 1013.3 1008.8 1002.1 998.0 1001.2 1005.2 1014.3 1017.7 1020.6 1011.5 MAX. QNH PRESSURE IN HPA 1029.2 1029.9 1022.0 1019.4 1016.1 1008.3 1002.7 1007.2 1011.6 1020.6 1024.8 1027.8 1029.9 DAY-HOUR 27- 6 7-21 22-21 4- 6 14-21 5- 6 25- 6 26- 6 30- 6 30- 6 30- 6 26- 6 MIN. QNH PRESSURE IN HPA 1009.9 1008.3 1007.3 1005.6 999.9 996.7 993.6 996.7 998.5 1007.2 1010.3 1016.1 993.6 DAY-HOUR 8-12 3- 3 5-15 26-21 30-15 14-15 10-15 4-15 1-15 3-15 10-12 4-12 MEAN QFF PRESSURE IN HPA 1022.1 1019.9 1016.2 1013.5 1008.9 1002.1 997.9 1001.2 1005.2 1014.4 1017.9 1020.8 1011.7 MAX. QFF PRESSURE IN HPA 1029.6 1030.3 1022.3 1019.6 1016.2 1008.3 1002.6 1007.2 1011.7 1020.7 1025.2 1028.1 1030.3 DAY-HOUR 27- 6 8- 0 22-21 4- 6 14-21 5- 6 25- 6 26- 6 30- 6 30- 6 30- 6 26- 6 MIN. QFF PRESSURE IN HPA 1010.1 1008.5 1007.4 1005.7 1000.0 996.7 993.6 996.7 998.5 1007.2 1010.4 1016.4 993.6 DAY-HOUR 8-12 3- 3 5-15 26-21 30-15 14-15 10-15 4-15 1-15 3-15 10-12 4-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.8 1015.8 1012.0 1009.3 1005.1 998.6 994.3 997.5 1001.4 1010.3 1013.5 1016.6 1007.7 MAX. QFE PRESSURE IN HPA 1023.0 1026.0 1018.0 1014.0 1011.4 1003.3 997.6 1001.8 1004.5 1015.4 1019.8 1021.9 1026.0 DAY 27 8 14 2 15 5 26 19 30 31 30 27 MIN. QFE PRESSURE IN HPA 1009.3 1005.3 1007.0 1002.5 997.6 994.0 991.9 994.4 996.7 1005.1 1007.5 1013.4 991.9 DAY 8 3 7 27 31 26 23 4 3 5 11 3 MEAN QNH PRESSURE IN HPA 1021.7 1019.7 1015.9 1013.2 1008.9 1002.4 998.2 1001.4 1005.3 1014.2 1017.4 1020.6 1011.6 MAX. QNH PRESSURE IN HPA 1026.9 1029.9 1021.9 1017.9 1015.3 1007.2 1001.4 1005.7 1008.4 1019.3 1023.7 1025.8 1029.9 DAY 27 8 14 2 15 5 26 19 30 31 30 27 MIN. QNH PRESSURE IN HPA 1013.2 1009.2 1010.9 1006.4 1001.4 997.8 995.7 998.2 1000.5 1009.0 1011.4 1017.3 995.7 DAY 8 3 7 27 31 26 23 4 3 5 11 3 MEAN QFF PRESSURE IN HPA 1021.9 1020.0 1016.2 1013.3 1009.0 1002.4 998.1 1001.3 1005.3 1014.3 1017.6 1020.8 1011.7 MAX. QFF PRESSURE IN HPA 1027.3 1030.3 1022.2 1018.1 1015.4 1007.2 1001.4 1005.6 1008.4 1019.4 1024.0 1026.1 1030.3 DAY 27 8 14 2 15 5 26 19 30 31 30 27 MIN. QFF PRESSURE IN HPA 1013.4 1009.4 1011.1 1006.5 1001.5 997.8 995.6 998.2 1000.5 1009.0 1011.5 1017.5 995.6 DAY 8 3 7 27 31 26 23 4 3 5 11 3 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1015.5 1012.1 1009.7 1005.1 998.6 994.5 997.8 1001.4 1010.5 1013.9 1016.7 1007.8 MAX. QFE PRESSURE IN HPA 1024.0 1024.2 1017.4 1013.4 1010.8 1002.7 998.1 1001.2 1005.3 1014.9 1019.5 1022.4 1024.2 DAY 27 8 14 2 15 5 21 8 30 30 30 26 MIN. QFE PRESSURE IN HPA 1008.1 1004.4 1007.1 1005.1 997.6 993.9 991.3 994.6 997.7 1005.1 1008.2 1013.2 991.3 DAY 8 3 5 27 31 26 10 3 8 3 11 4 MEAN QNH PRESSURE IN HPA 1021.6 1019.4 1016.0 1013.5 1009.0 1002.4 998.3 1001.6 1005.2 1014.4 1017.8 1020.6 1011.6 MAX. QNH PRESSURE IN HPA 1027.9 1028.1 1021.3 1017.3 1014.7 1006.6 1001.9 1005.1 1009.2 1018.8 1023.4 1026.3 1028.1 DAY 27 8 14 2 15 5 21 8 30 30 30 26 MIN. QNH PRESSURE IN HPA 1012.0 1008.3 1011.0 1009.0 1001.4 997.7 995.1 998.4 1001.5 1009.0 1012.1 1017.1 995.1 DAY 8 3 5 27 31 26 10 3 8 3 11 4 MEAN QFF PRESSURE IN HPA 1021.8 1019.7 1016.2 1013.7 1009.1 1002.4 998.3 1001.6 1005.3 1014.5 1018.0 1020.9 1011.8 MAX. QFF PRESSURE IN HPA 1028.3 1028.5 1021.7 1017.5 1014.8 1006.6 1001.9 1005.0 1009.3 1019.0 1023.8 1026.6 1028.5 DAY 27 8 14 2 15 5 25 8 30 31 30 27 MIN. QFF PRESSURE IN HPA 1012.2 1008.5 1011.2 1009.1 1001.5 997.7 995.1 998.4 1001.6 1009.0 1012.2 1017.4 995.1 DAY 8 3 5 27 31 26 10 3 8 3 11 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1019.0 1016.8 1013.4 1010.7 1006.0 999.3 995.2 998.7 1002.6 1011.9 1015.3 1018.1 1008.9 MAX. QFE PRESSURE IN HPA 1025.3 1025.1 1017.8 1015.5 1011.4 1004.4 998.8 1003.3 1007.7 1016.7 1020.9 1023.9 1025.3 DAY 27 7 23 4 15 5 25 26 30 30 30 26 MIN. QFE PRESSURE IN HPA 1008.3 1007.8 1005.9 1005.8 998.4 994.4 992.1 995.6 998.2 1006.4 1009.3 1014.6 992.1 DAY 8 3 5 26 31 26 10 3 1 3 11 3 MEAN QNH PRESSURE IN HPA 1022.9 1020.8 1017.3 1014.6 1009.8 1003.2 999.1 1002.6 1006.5 1015.8 1019.2 1022.1 1012.8 MAX. QNH PRESSURE IN HPA 1029.2 1029.0 1021.7 1019.4 1015.3 1008.3 1002.7 1007.2 1011.6 1020.6 1024.8 1027.8 1029.2 DAY 27 7 23 4 15 5 25 26 30 30 30 26 MIN. QNH PRESSURE IN HPA 1012.2 1011.7 1009.8 1009.7 1002.2 998.2 995.9 999.4 1002.0 1010.3 1013.2 1018.5 995.9 DAY 8 3 5 26 31 26 10 3 1 3 11 3 MEAN QFF PRESSURE IN HPA 1023.1 1021.1 1017.5 1014.8 1009.9 1003.1 999.0 1002.5 1006.5 1015.9 1019.4 1022.4 1012.9 MAX. QFF PRESSURE IN HPA 1029.6 1029.4 1022.0 1019.6 1015.4 1008.3 1002.6 1007.2 1011.7 1020.7 1025.2 1028.1 1029.6 DAY 27 7 23 4 15 5 25 26 30 30 30 26 MIN. QFF PRESSURE IN HPA 1012.4 1011.9 1009.9 1009.8 1002.2 998.2 995.9 999.4 1002.1 1010.4 1013.3 1018.8 995.9 DAY 8 3 5 26 31 26 10 3 1 3 11 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1016.3 1012.9 1010.2 1005.6 998.9 994.8 998.1 1002.0 1010.9 1014.3 1017.0 1008.3 MAX. QFE PRESSURE IN HPA 1024.3 1025.7 1017.2 1014.1 1010.7 1003.7 998.5 1001.8 1007.2 1014.9 1019.9 1022.5 1025.7 DAY 27 7 22 6 14 5 21 18 30 30 29 26 MIN. QFE PRESSURE IN HPA 1007.0 1009.0 1007.0 1005.6 998.0 994.3 991.6 994.6 997.5 1004.8 1008.7 1012.8 991.6 DAY 8 3 3 26 31 26 10 3 1 3 10 8 MEAN QNH PRESSURE IN HPA 1022.4 1020.2 1016.8 1014.1 1009.5 1002.7 998.6 1001.9 1005.9 1014.8 1018.2 1020.9 1012.2 MAX. QNH PRESSURE IN HPA 1028.2 1029.6 1021.1 1018.0 1014.6 1007.6 1002.3 1005.7 1011.1 1018.8 1023.8 1026.4 1029.6 DAY 27 7 22 6 14 5 21 18 30 30 29 26 MIN. QNH PRESSURE IN HPA 1010.9 1012.9 1010.9 1009.5 1001.8 998.1 995.4 998.4 1001.3 1008.7 1012.6 1016.7 995.4 DAY 8 3 3 26 31 26 10 3 1 3 10 8 MEAN QFF PRESSURE IN HPA 1022.6 1020.5 1017.0 1014.2 1009.5 1002.7 998.5 1001.8 1005.9 1014.9 1018.4 1021.2 1012.3 MAX. QFF PRESSURE IN HPA 1028.6 1030.0 1021.4 1018.2 1014.7 1007.6 1002.3 1005.6 1011.1 1018.9 1024.1 1026.7 1030.0 DAY 27 7 22 6 14 5 21 18 30 30 29 26 MIN. QFF PRESSURE IN HPA 1011.1 1013.2 1011.1 1009.6 1001.8 998.1 995.4 998.4 1001.3 1008.7 1012.7 1016.9 995.4 DAY 8 3 3 26 31 26 10 3 1 3 10 8 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.9 1014.7 1011.1 1008.8 1004.3 997.6 993.3 996.3 1000.2 1009.3 1012.7 1015.6 1006.7 MAX. QFE PRESSURE IN HPA 1021.8 1024.9 1017.1 1012.5 1009.9 1002.6 996.6 1001.1 1006.1 1014.2 1018.9 1020.8 1024.9 DAY 26 7 20 7 14 4 25 18 30 30 29 26 MIN. QFE PRESSURE IN HPA 1006.0 1007.9 1003.7 1003.9 996.3 993.3 990.3 993.1 995.0 1003.4 1006.4 1012.2 990.3 DAY 8 2 3 28 30 26 10 3 1 3 10 4 MEAN QNH PRESSURE IN HPA 1020.8 1018.6 1015.0 1012.6 1008.2 1001.5 997.2 1000.2 1004.0 1013.2 1016.6 1019.5 1010.6 MAX. QNH PRESSURE IN HPA 1025.7 1028.8 1021.0 1016.4 1013.8 1006.5 1000.4 1005.0 1010.0 1018.1 1022.8 1024.7 1028.8 DAY 26 7 20 7 14 4 25 18 30 30 29 26 MIN. QNH PRESSURE IN HPA 1009.9 1011.8 1007.6 1007.8 1000.1 997.1 994.1 996.9 998.8 1007.3 1010.3 1016.1 994.1 DAY 8 2 3 28 30 26 10 3 1 3 10 4 MEAN QFF PRESSURE IN HPA 1021.1 1018.9 1015.2 1012.8 1008.2 1001.5 997.1 1000.1 1004.0 1013.3 1016.8 1019.7 1010.7 MAX. QFF PRESSURE IN HPA 1026.1 1029.2 1021.3 1016.6 1013.9 1006.5 1000.4 1004.9 1010.0 1018.2 1023.1 1025.0 1029.2 DAY 26 7 20 7 14 4 25 18 30 30 29 26 MIN. QFF PRESSURE IN HPA 1010.1 1012.0 1007.7 1007.9 1000.1 997.1 994.1 996.9 998.8 1007.3 1010.4 1016.4 994.1 DAY 8 2 3 28 30 26 10 3 1 3 10 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.1 1014.8 1011.0 1008.2 1003.8 997.0 992.8 995.9 1000.0 1009.3 1013.0 1016.0 1006.6 MAX. QFE PRESSURE IN HPA 1022.2 1024.2 1017.2 1011.8 1009.7 1001.8 996.5 1001.1 1005.8 1014.4 1019.1 1021.1 1024.2 DAY 26 7 13 4 14 4 25 18 30 30 29 26 MIN. QFE PRESSURE IN HPA 1007.3 1007.8 1003.4 1002.1 996.1 992.9 989.8 992.9 994.7 1003.3 1006.7 1012.5 989.8 DAY 8 2 5 26 30 14 10 4 1 3 10 4 MEAN QNH PRESSURE IN HPA 1021.0 1018.7 1014.9 1012.1 1007.7 1000.8 996.7 999.8 1003.8 1013.2 1016.9 1019.9 1010.5 MAX. QNH PRESSURE IN HPA 1026.1 1028.1 1021.1 1015.7 1013.6 1005.7 1000.3 1005.0 1009.7 1018.3 1023.0 1025.0 1028.1 DAY 26 7 13 4 14 4 25 18 30 30 29 26 MIN. QNH PRESSURE IN HPA 1011.2 1011.7 1007.3 1006.0 999.9 996.7 993.6 996.7 998.5 1007.2 1010.6 1016.4 993.6 DAY 8 2 5 26 30 14 10 4 1 3 10 4 MEAN QFF PRESSURE IN HPA 1021.4 1019.0 1015.1 1012.2 1007.8 1000.8 996.6 999.8 1003.8 1013.3 1017.2 1020.3 1010.6 MAX. QFF PRESSURE IN HPA 1026.5 1028.5 1021.4 1015.9 1013.7 1005.7 1000.3 1004.9 1009.8 1018.4 1023.3 1025.3 1028.5 DAY 26 7 13 4 14 4 25 18 30 30 29 26 MIN. QFF PRESSURE IN HPA 1011.4 1011.9 1007.4 1006.1 1000.0 996.7 993.6 996.7 998.5 1007.2 1010.8 1016.7 993.6 DAY 8 2 5 26 30 14 10 4 1 3 10 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1018.1 1015.7 1012.1 1009.2 1004.7 997.9 993.9 997.1 1001.2 1010.3 1013.8 1016.6 1007.5 MAX. QFE PRESSURE IN HPA 1023.8 1025.7 1016.6 1014.5 1011.0 1003.3 998.0 1002.9 1006.5 1015.0 1019.8 1021.4 1025.7 DAY 26 7 13 1 14 4 25 18 30 30 29 26 MIN. QFE PRESSURE IN HPA 1009.2 1008.7 1006.3 1002.8 996.6 993.8 991.0 993.5 996.2 1005.1 1006.9 1013.2 991.0 DAY 8 2 5 26 30 14 9 3 1 3 10 2 MEAN QNH PRESSURE IN HPA 1022.0 1019.6 1016.0 1013.1 1008.6 1001.7 997.8 1000.9 1005.1 1014.2 1017.7 1020.5 1011.4 MAX. QNH PRESSURE IN HPA 1027.7 1029.6 1020.5 1018.4 1014.9 1007.2 1001.8 1006.8 1010.4 1018.9 1023.7 1025.3 1029.6 DAY 26 7 13 1 14 4 25 18 30 30 29 26 MIN. QNH PRESSURE IN HPA 1013.1 1012.6 1010.2 1006.7 1000.4 997.6 994.8 997.3 1000.0 1009.0 1010.8 1017.1 994.8 DAY 8 2 5 26 30 14 9 3 1 3 10 2 MEAN QFF PRESSURE IN HPA 1022.3 1019.9 1016.2 1013.3 1008.6 1001.7 997.7 1000.8 1005.1 1014.3 1017.9 1020.8 1011.6 MAX. QFF PRESSURE IN HPA 1028.1 1030.0 1020.9 1018.6 1015.0 1007.2 1001.8 1006.8 1010.4 1019.0 1024.1 1025.6 1030.0 DAY 26 7 22 1 14 4 25 18 30 30 29 26 MIN. QFF PRESSURE IN HPA 1013.3 1012.8 1010.4 1006.8 1000.5 997.6 994.8 997.3 1000.0 1009.0 1010.9 1017.4 994.8 DAY 8 2 5 26 30 14 9 3 1 5 10 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1018.1 1015.9 1012.5 1009.6 1005.2 998.5 994.5 997.7 1001.8 1010.6 1014.0 1016.6 1007.9 MAX. QFE PRESSURE IN HPA 1023.0 1026.0 1018.1 1015.0 1012.2 1004.0 998.5 1003.0 1007.0 1015.2 1019.8 1021.6 1026.0 DAY 26 7 22 1 14 4 25 18 30 30 29 26 MIN. QFE PRESSURE IN HPA 1009.3 1007.0 1007.0 1001.7 997.4 993.9 992.0 994.0 996.9 1005.3 1007.6 1012.8 992.0 DAY 7 2 6 26 30 25 10 3 1 4 10 2 MEAN QNH PRESSURE IN HPA 1022.0 1019.8 1016.4 1013.5 1009.1 1002.3 998.3 1001.5 1005.7 1014.5 1017.9 1020.5 1011.8 MAX. QNH PRESSURE IN HPA 1026.9 1029.9 1022.0 1018.9 1016.1 1007.9 1002.3 1006.9 1010.9 1019.1 1023.7 1025.5 1029.9 DAY 26 7 22 1 14 4 25 18 30 30 29 26 MIN. QNH PRESSURE IN HPA 1013.2 1010.9 1010.9 1005.6 1001.2 997.7 995.8 997.8 1000.7 1009.2 1011.5 1016.7 995.8 DAY 7 2 6 26 30 25 10 3 1 4 10 2 MEAN QFF PRESSURE IN HPA 1022.4 1020.1 1016.6 1013.6 1009.1 1002.3 998.3 1001.4 1005.7 1014.6 1018.1 1020.8 1011.9 MAX. QFF PRESSURE IN HPA 1027.3 1030.3 1022.3 1019.1 1016.2 1007.9 1002.3 1006.8 1010.9 1019.2 1024.0 1025.8 1030.3 DAY 26 7 22 1 14 4 25 18 30 30 29 26 MIN. QFF PRESSURE IN HPA 1013.4 1011.1 1011.1 1005.7 1001.3 997.7 995.8 997.8 1000.7 1009.2 1011.6 1017.0 995.8 DAY 7 2 6 26 30 25 10 3 1 4 10 2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 14.2 14.2 19.4 26.4 31.2 35.4 36.8 35.4 32.9 27.5 19.7 10.9 25.3 MINIMUN AIR TEMPERATURE (C) 8.9 7.2 12.7 18.2 22.2 25.2 26.8 25.1 23.8 19.9 14.8 6.3 17.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 6 20 30 31 31 30 11 3 0 162 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) 5.0 3.0 8.0 13.6 14.2 22.4 22.0 22.0 21.0 17.0 9.0 0.5 0.5 DAY 19 4 3 3 19 7 1 27 23 25 10 8 MAXIMUM AIR TEMPERATURE (C) 20.5 21.5 26.1 34.6 39.7 44.8 45.4 45.3 42.0 35.3 24.9 16.2 33.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 27 31 30 31 31 30 30 4 0 216 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.8 27.0 34.0 41.6 47.2 48.6 48.0 49.0 45.4 39.0 35.0 22.0 49.0 DAY 2 28 31 30 31 9 12 9 13 1 1 19 DIF. BETWEEN (MAX.-MIN.) (C) 11.6 14.3 13.4 16.4 17.5 19.6 18.6 20.2 18.2 15.4 10.1 9.9 15.4 MEAN DAILY TEMP. (MDT) (C) 14.7 14.4 19.4 26.4 30.9 35.0 36.1 35.2 32.9 27.6 19.9 11.3 25.3 COOLING DEG. DAYS(BASE 21 0C) 1.0 0.0 10.1 161.4 307.7 418.8 466.8 439.3 357.0 205.2 30.2 0.0 2397.6 HEATING DEG. DAYS(BASE 18 0C) 112.0 103.1 10.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17.3 208.9 451.7 DEWPOINT (MEAN C) 8.6 5.7 8.8 12.5 13.2 11.4 14.8 14.3 12.7 13.0 13.2 7.1 11.3 MIXING RATIO (G/KG) 7.04 5.81 7.37 9.37 10.06 9.28 11.18 11.38 9.67 9.63 9.63 6.43 8.90 VAPOUR PRESSURE (HPA) 11.36 9.38 11.83 14.93 15.97 14.59 17.50 17.79 15.34 15.39 15.43 10.42 14.16 SATURATION DEF. (HPA) 5.55 7.71 11.64 21.63 32.77 46.53 47.54 43.33 37.53 22.81 8.44 3.08 24.05 RELATIVE HUMIDITY (MEAN %) 72 59 54 46 38 27 29 33 33 45 69 79 49 RELATIVE HUMIDITY (MAX. %) 89 80 78 67 54 42 43 56 55 66 85 92 67 RELATIVE HUMIDITY (MIN. %) 49 39 34 28 25 14 17 16 17 24 49 57 31 RELATIVE HUMIDITY (MEAN% 03UTC) 88 76 69 61 51 38 40 46 49 62 79 89 62 RELATIVE HUMIDITY (MEAN% 09UTC) 60 46 42 34 28 20 22 23 20 31 61 66 38 RELATIVE HUMIDITY (MEAN% 15UTC) 66 48 44 34 31 20 21 24 22 35 67 76 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 73.0 0.0 40.3 5.4 11.0 0.0 0.0 0.0 0.0 11.2 238.0 21.5 400.4 DAYS WITH PRECIPITATION >=10 3 0 3 0 1 0 0 0 0 0 7 0 14 DAYS WITH PRECIPITATION >= 5 3 0 3 0 1 0 0 0 0 1 8 2 18 DAYS WITH PRECIPITATION >= 1 3 0 4 2 1 0 0 0 0 2 11 5 28 DAYS WITH PRECIPITATION 4 1 6 2 3 0 0 0 0 3 12 6 37 GREATEST DAILY PRECIPITATION 38.0 0.0 16.0 4.0 11.0 0.0 0.0 0.0 0.0 8.0 47.0 6.0 47.0 DAY 23 ** 26 17 5 ** ** ** ** 18 24 15 DAY WITH THUNDER STORM 1 0 2 0 1 0 0 0 0 4 8 1 17 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 4 8 7 14 11 21 18 6 8 6 2 107 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.8 9.2 9.8 10.6 11.2 12.4 11.7 11.7 11.3 10.8 10.1 9.2 10.8 PREVAILING WIND PERCENT 17.7 19.2 16.1 17.9 34.7 42.5 48.8 28.6 20.8 16.3 20.8 31.0 26.3 CALMS PERCENT OF WIND 54.8 46.9 53.6 38.8 17.3 13.8 13.7 39.5 41.3 45.5 32.5 48.0 37.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 246 240 248 2918 VECTOR WIND DIRECTION (MEAN) 215 263 220 274 301 297 293 289 271 285 108 308 288 VECTOR WIND MAGNITUDE(KNOTS) 0.6 1.6 1.4 2.4 5.3 7.1 7.5 4.8 3.0 1.9 1.8 3.1 2.9 WIND STEADINESES (MEAN %) 12.8 28.1 27.5 38.1 58.2 70.3 77.3 69.6 47.6 31.7 22.2 66.0 42.0 WIND SPEED (MEAN KNOTS) 4.7 5.7 5.1 6.3 9.1 10.1 9.7 6.9 6.3 6.0 8.1 4.7 6.9 FASTEST WIND DIRECTION 210 180 300 310 310 290 310 300 330 240 150 130 310 FASTEST WIND SPEED (KNOTS) 25 45 39 47 25 25 35 23 21 29 31 19 47 DAY 5 28 12 30 10 12 19 8 27 18 5 3 DAYS WITH SKY CLEAR (0-2)/8 14 20 15 14 24 29 31 30 26 20 10 18 251 DAYS WITH P.CLOUDY (3-6)/8 9 8 10 15 4 1 0 1 4 8 9 6 75 DAYS WITH CLOUDY (7-8)/8 8 0 6 1 3 0 0 0 0 3 11 7 39 DAYS WITH VISIBILITY =< 2 KM 5 0 3 1 1 1 5 2 0 2 2 7 29 DURATION OF SUNSHINE HOURS 154.1 216.9 218.9 246.6 283.1 334.4 330.8 334.1 262.7 213.6 137.4 170.5 2903.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1014.9 1013.8 1011.7 1007.7 1004.4 995.9 993.0 995.0 1003.3 1010.2 1013.4 1019.4 1006.9 MAX. QFE PRESSURE IN HPA 1024.3 1020.7 1019.0 1014.9 1012.6 1000.9 995.9 1000.3 1012.6 1015.9 1020.9 1025.7 1025.7 DAY-HOUR 28- 6 4- 6 18- 6 17- 0 8- 6 18- 6 19- 6 15- 6 24- 6 20- 9 10- 6 7- 3 MIN. QFE PRESSURE IN HPA 1001.8 1004.4 1000.7 999.3 997.3 992.1 988.9 990.5 993.7 1004.2 1006.0 1004.4 988.9 DAY-HOUR 23-12 12- 0 12- 0 26-15 31-15 11-15 12-12 10-15 1-15 4-15 30-15 3-12 MEAN QNH PRESSURE IN HPA 1018.8 1017.7 1015.5 1011.6 1008.2 999.8 996.9 998.8 1007.2 1014.0 1017.3 1023.3 1010.8 MAX. QNH PRESSURE IN HPA 1028.2 1024.6 1022.9 1018.8 1016.5 1004.8 999.7 1004.2 1016.5 1019.8 1024.8 1029.6 1029.6 DAY-HOUR 28- 6 4- 6 18- 6 17- 0 8- 6 18- 6 19- 6 15- 6 24- 6 20- 9 10- 6 7- 3 MIN. QNH PRESSURE IN HPA 1005.7 1008.3 1004.6 1003.2 1001.1 995.9 992.7 994.3 997.5 1008.1 1009.9 1008.3 992.7 DAY-HOUR 23-12 12- 0 12- 0 26-15 31-15 11-15 12-12 10-15 1-15 4-15 30-15 3-12 MEAN QFF PRESSURE IN HPA 1019.1 1018.0 1015.8 1011.7 1008.3 999.7 996.8 998.8 1007.2 1014.1 1017.5 1023.7 1010.9 MAX. QFF PRESSURE IN HPA 1028.6 1025.0 1023.2 1018.9 1016.6 1004.7 999.7 1004.1 1016.5 1019.9 1025.1 1030.1 1030.1 DAY-HOUR 28- 6 4- 6 18- 6 17- 0 8- 6 18- 6 19- 6 15- 6 24- 6 20- 9 10- 6 7- 6 MIN. QFF PRESSURE IN HPA 1005.9 1008.5 1004.7 1003.2 1001.1 995.9 992.6 994.3 997.6 1008.2 1010.1 1008.5 992.6 DAY-HOUR 23-12 12- 0 12- 0 26-15 31-15 11-15 12-12 10-15 1-15 4-15 30-15 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1015.3 1013.8 1011.5 1008.0 1004.4 996.2 993.3 995.2 1003.2 1010.0 1013.4 1019.3 1007.0 MAX. QFE PRESSURE IN HPA 1022.0 1019.6 1016.6 1014.9 1011.2 998.9 995.8 998.2 1011.1 1014.4 1019.1 1025.4 1025.4 DAY 28 26 18 17 8 1 1 15 24 23 10 22 MIN. QFE PRESSURE IN HPA 1009.1 1004.4 1000.7 1002.0 998.4 993.0 990.6 992.5 995.2 1006.6 1007.8 1009.7 990.6 DAY 24 12 12 27 31 28 15 1 1 6 17 1 MEAN QNH PRESSURE IN HPA 1019.3 1017.7 1015.4 1011.8 1008.3 1000.0 997.1 999.0 1007.1 1013.9 1017.3 1023.2 1010.8 MAX. QNH PRESSURE IN HPA 1025.9 1023.5 1020.5 1018.8 1015.1 1002.8 999.6 1002.0 1015.0 1018.3 1023.0 1029.3 1029.3 DAY 28 26 18 17 8 1 1 15 24 23 10 22 MIN. QNH PRESSURE IN HPA 1013.0 1008.3 1004.6 1005.9 1002.2 996.8 994.4 996.3 999.0 1010.5 1011.7 1013.6 994.4 DAY 24 12 12 27 31 28 15 1 1 6 17 1 MEAN QFF PRESSURE IN HPA 1019.5 1018.0 1015.6 1012.0 1008.3 1000.0 997.0 999.0 1007.1 1014.0 1017.5 1023.6 1011.0 MAX. QFF PRESSURE IN HPA 1026.2 1023.8 1020.8 1018.9 1015.2 1002.8 999.7 1002.0 1015.0 1018.4 1023.3 1029.7 1029.7 DAY 28 26 18 17 8 5 1 15 24 23 10 22 MIN. QFF PRESSURE IN HPA 1013.3 1008.5 1004.7 1005.9 1002.2 996.8 994.4 996.3 999.0 1010.6 1011.8 1013.8 994.4 DAY 24 12 12 27 31 28 15 1 1 6 17 1 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1015.0 1013.5 1011.8 1008.2 1004.8 996.1 993.5 995.4 1003.4 1010.2 1013.5 1019.2 1007.1 MAX. QFE PRESSURE IN HPA 1022.2 1019.0 1017.8 1014.8 1011.4 999.6 995.1 998.8 1011.3 1014.8 1019.2 1025.7 1025.7 DAY 28 4 18 16 8 18 19 15 24 20 10 7 MIN. QFE PRESSURE IN HPA 1007.6 1005.1 1003.2 1003.6 999.1 993.0 990.9 992.0 995.0 1006.2 1008.3 1009.0 990.9 DAY 16 12 12 26 31 23 12 10 1 6 17 3 MEAN QNH PRESSURE IN HPA 1018.9 1017.4 1015.6 1012.1 1008.6 1000.0 997.3 999.3 1007.3 1014.1 1017.4 1023.1 1010.9 MAX. QNH PRESSURE IN HPA 1026.1 1022.9 1021.7 1018.7 1015.3 1003.5 998.9 1002.7 1015.2 1018.7 1023.1 1029.6 1029.6 DAY 28 4 18 16 8 18 19 15 24 20 10 7 MIN. QNH PRESSURE IN HPA 1011.5 1009.0 1007.1 1007.5 1003.0 996.8 994.7 995.8 998.8 1010.1 1012.2 1012.9 994.7 DAY 16 12 12 26 31 23 12 10 1 6 17 3 MEAN QFF PRESSURE IN HPA 1019.2 1017.7 1015.9 1012.2 1008.7 1000.0 997.3 999.3 1007.3 1014.2 1017.6 1023.6 1011.1 MAX. QFF PRESSURE IN HPA 1026.5 1023.3 1022.0 1018.8 1015.4 1003.4 998.9 1002.7 1015.3 1018.9 1023.4 1030.0 1030.0 DAY 28 4 18 16 8 18 19 15 24 20 10 7 MIN. QFF PRESSURE IN HPA 1011.7 1009.2 1007.3 1007.5 1002.9 996.8 994.7 995.8 998.9 1010.2 1012.4 1013.1 994.7 DAY 16 12 12 26 31 23 12 10 2 6 17 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.3 1015.0 1013.3 1009.2 1005.8 997.1 994.3 996.2 1004.6 1011.7 1014.7 1020.5 1008.2 MAX. QFE PRESSURE IN HPA 1024.3 1020.7 1019.0 1014.8 1012.6 1000.9 995.9 1000.3 1012.6 1015.8 1020.9 1025.7 1025.7 DAY 28 4 18 15 8 18 19 15 24 23 10 7 MIN. QFE PRESSURE IN HPA 1008.4 1008.5 1004.1 1003.7 999.9 994.2 992.1 992.5 995.7 1007.6 1009.1 1009.0 992.1 DAY 23 12 12 30 31 28 12 10 1 3 17 3 MEAN QNH PRESSURE IN HPA 1020.3 1018.9 1017.2 1013.1 1009.7 1000.9 998.2 1000.0 1008.5 1015.6 1018.6 1024.4 1012.1 MAX. QNH PRESSURE IN HPA 1028.2 1024.6 1022.9 1018.7 1016.5 1004.8 999.7 1004.2 1016.5 1019.7 1024.8 1029.6 1029.6 DAY 28 4 18 15 8 18 19 15 24 23 10 7 MIN. QNH PRESSURE IN HPA 1012.3 1012.4 1008.0 1007.6 1003.8 998.0 995.9 996.3 999.5 1011.5 1013.0 1012.9 995.9 DAY 23 12 12 30 31 28 12 10 1 3 17 3 MEAN QFF PRESSURE IN HPA 1020.6 1019.2 1017.4 1013.2 1009.7 1000.9 998.1 1000.0 1008.5 1015.7 1018.8 1024.7 1012.2 MAX. QFF PRESSURE IN HPA 1028.6 1025.0 1023.2 1018.9 1016.6 1004.7 999.7 1004.1 1016.5 1019.8 1025.1 1030.1 1030.1 DAY 28 4 18 15 8 18 19 15 24 23 10 7 MIN. QFF PRESSURE IN HPA 1012.6 1012.6 1008.2 1007.5 1003.7 998.0 995.9 996.3 999.5 1011.5 1013.2 1013.1 995.9 DAY 23 28 12 30 31 28 12 10 1 3 17 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1014.4 1012.7 1008.5 1005.2 996.5 993.6 995.7 1004.1 1010.8 1014.0 1020.0 1007.6 MAX. QFE PRESSURE IN HPA 1022.9 1019.3 1017.7 1014.6 1010.7 1000.3 995.1 999.7 1011.7 1015.9 1020.1 1024.8 1024.8 DAY 28 26 18 16 8 5 24 15 24 20 10 6 MIN. QFE PRESSURE IN HPA 1003.6 1006.9 1003.9 1002.2 999.2 993.9 991.5 992.6 995.6 1007.0 1007.8 1005.8 991.5 DAY 23 28 12 30 31 27 12 4 1 6 25 3 MEAN QNH PRESSURE IN HPA 1019.3 1018.3 1016.6 1012.4 1009.1 1000.3 997.5 999.5 1007.9 1014.7 1017.9 1023.9 1011.4 MAX. QNH PRESSURE IN HPA 1026.8 1023.2 1021.6 1018.5 1014.6 1004.2 998.9 1003.6 1015.6 1019.8 1024.0 1028.7 1028.7 DAY 28 26 18 16 8 5 24 15 24 20 10 6 MIN. QNH PRESSURE IN HPA 1007.5 1010.8 1007.8 1006.1 1003.1 997.7 995.3 996.4 999.4 1010.9 1011.7 1009.7 995.3 DAY 23 28 12 30 31 27 12 4 1 6 25 3 MEAN QFF PRESSURE IN HPA 1019.6 1018.6 1016.8 1012.5 1009.1 1000.3 997.5 999.5 1007.9 1014.8 1018.1 1024.3 1011.6 MAX. QFF PRESSURE IN HPA 1027.1 1023.5 1021.9 1018.6 1014.7 1004.2 998.9 1003.5 1015.6 1019.9 1024.3 1029.1 1029.1 DAY 28 26 18 16 8 5 24 15 24 20 10 6 MIN. QFF PRESSURE IN HPA 1007.8 1010.9 1008.0 1006.0 1003.0 997.7 995.8 996.4 999.4 1010.9 1011.9 1009.9 995.8 DAY 23 28 12 30 31 27 21 4 1 6 25 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1013.7 1012.7 1010.6 1006.5 1003.4 995.1 992.1 994.0 1002.2 1009.2 1012.6 1018.6 1005.9 MAX. QFE PRESSURE IN HPA 1021.2 1017.5 1015.7 1013.4 1008.6 998.7 993.6 997.7 1008.7 1013.6 1018.7 1023.5 1023.5 DAY 28 18 18 16 7 5 3 15 23 22 10 5 MIN. QFE PRESSURE IN HPA 1001.8 1005.8 1002.0 999.8 997.4 992.9 988.9 990.6 994.4 1005.1 1006.3 1004.4 988.9 DAY 23 11 11 30 31 27 12 10 1 5 25 3 MEAN QNH PRESSURE IN HPA 1017.6 1016.5 1014.4 1010.4 1007.2 998.9 995.9 997.9 1006.0 1013.1 1016.5 1022.5 1009.7 MAX. QNH PRESSURE IN HPA 1025.1 1021.4 1019.6 1017.3 1012.5 1002.6 997.4 1001.5 1012.6 1017.5 1022.6 1027.4 1027.4 DAY 28 18 18 16 7 5 3 15 23 22 10 5 MIN. QNH PRESSURE IN HPA 1005.7 1009.7 1005.9 1003.7 1001.2 996.7 992.7 994.4 998.2 1009.0 1010.2 1008.3 992.7 DAY 23 11 11 30 31 27 12 10 1 5 25 3 MEAN QFF PRESSURE IN HPA 1017.9 1016.8 1014.6 1010.6 1007.3 998.9 995.8 997.8 1006.0 1013.2 1016.7 1022.8 1009.9 MAX. QFF PRESSURE IN HPA 1025.4 1021.7 1019.8 1017.4 1012.6 1002.6 997.4 1001.5 1012.6 1017.6 1022.9 1027.8 1027.8 DAY 28 18 18 16 7 5 3 15 24 22 10 5 MIN. QFF PRESSURE IN HPA 1005.9 1009.9 1006.0 1003.6 1001.2 996.7 992.6 994.4 998.2 1009.0 1010.4 1008.5 992.6 DAY 23 11 11 30 31 27 12 10 1 5 25 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1014.2 1012.9 1010.4 1006.1 1003.0 994.5 991.5 993.4 1002.0 1009.2 1012.6 1018.8 1005.7 MAX. QFE PRESSURE IN HPA 1021.1 1017.7 1015.3 1012.4 1008.5 997.5 993.6 997.1 1009.1 1013.6 1018.9 1024.0 1024.0 DAY 28 3 18 16 8 5 3 15 23 31 10 5 MIN. QFE PRESSURE IN HPA 1003.9 1005.8 1000.9 999.3 997.3 992.1 989.6 990.5 993.7 1004.2 1006.0 1006.1 989.6 DAY 23 11 11 26 31 11 11 10 1 4 30 3 MEAN QNH PRESSURE IN HPA 1018.1 1016.8 1014.3 1010.0 1006.8 998.3 995.3 997.3 1005.9 1013.1 1016.5 1022.7 1009.6 MAX. QNH PRESSURE IN HPA 1025.0 1021.6 1019.2 1016.3 1012.4 1001.3 997.4 1000.9 1013.0 1017.5 1022.8 1027.9 1027.9 DAY 28 3 18 16 8 5 3 15 23 31 10 5 MIN. QNH PRESSURE IN HPA 1007.8 1009.7 1004.8 1003.2 1001.1 995.9 993.4 994.3 997.5 1008.1 1009.9 1010.0 993.4 DAY 23 11 11 26 31 11 11 10 1 4 30 3 MEAN QFF PRESSURE IN HPA 1018.4 1017.1 1014.5 1010.1 1006.9 998.3 995.3 997.2 1005.9 1013.2 1016.7 1023.1 1009.7 MAX. QFF PRESSURE IN HPA 1025.4 1021.9 1019.5 1016.4 1012.5 1001.4 997.4 1001.0 1013.1 1017.6 1023.1 1028.3 1028.3 DAY 28 3 18 16 8 5 3 15 23 31 10 5 MIN. QFF PRESSURE IN HPA 1008.1 1010.0 1004.9 1003.2 1001.1 995.9 993.4 994.3 997.6 1008.2 1010.1 1010.2 993.4 DAY 23 11 11 26 31 11 11 10 1 4 30 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1014.7 1014.0 1011.4 1007.2 1003.9 995.6 992.7 994.6 1003.2 1010.0 1013.4 1019.4 1006.7 MAX. QFE PRESSURE IN HPA 1022.2 1019.1 1015.7 1013.4 1010.4 998.6 994.4 998.2 1010.6 1014.6 1019.3 1024.7 1024.7 DAY 27 3 2 16 7 4 25 15 23 31 10 5 MIN. QFE PRESSURE IN HPA 1006.0 1005.8 1001.9 1000.7 998.2 992.8 990.1 991.5 995.1 1005.6 1007.5 1009.0 990.1 DAY 31 11 11 30 31 27 11 3 1 5 30 3 MEAN QNH PRESSURE IN HPA 1018.6 1017.9 1015.2 1011.1 1007.7 999.5 996.5 998.4 1007.1 1013.9 1017.3 1023.3 1010.5 MAX. QNH PRESSURE IN HPA 1026.1 1023.0 1019.6 1017.3 1014.3 1002.4 998.2 1002.0 1014.5 1018.5 1023.2 1028.6 1028.6 DAY 27 3 2 16 7 4 25 15 23 31 10 5 MIN. QNH PRESSURE IN HPA 1009.9 1009.7 1005.8 1004.6 1002.0 996.6 993.9 995.3 998.9 1009.5 1011.4 1012.9 993.9 DAY 31 11 11 30 31 27 11 3 1 5 30 3 MEAN QFF PRESSURE IN HPA 1018.9 1018.2 1015.5 1011.1 1007.8 999.5 996.5 998.4 1007.1 1014.0 1017.5 1023.7 1010.7 MAX. QFF PRESSURE IN HPA 1026.5 1023.4 1019.9 1017.4 1014.4 1002.4 998.2 1002.0 1014.5 1018.6 1023.5 1029.0 1029.0 DAY 27 3 17 16 7 4 25 15 23 31 10 5 MIN. QFF PRESSURE IN HPA 1010.1 1010.0 1006.0 1004.5 1002.0 996.6 993.9 995.3 999.0 1009.6 1011.6 1013.1 993.9 DAY 31 11 11 30 31 27 11 3 1 5 30 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1015.1 1014.3 1011.8 1007.8 1004.6 996.6 993.5 995.3 1003.8 1010.3 1013.4 1019.8 1007.2 MAX. QFE PRESSURE IN HPA 1023.0 1019.6 1016.6 1014.4 1012.5 999.9 995.2 998.8 1011.6 1014.2 1019.3 1025.0 1025.0 DAY 27 25 17 16 7 4 25 15 23 31 10 6 MIN. QFE PRESSURE IN HPA 1006.0 1005.4 1000.8 1001.7 998.6 993.7 990.5 992.5 996.2 1006.2 1007.6 1010.5 990.5 DAY 31 11 11 30 31 27 11 3 1 5 16 3 MEAN QNH PRESSURE IN HPA 1019.0 1018.2 1015.7 1011.7 1008.5 1000.4 997.3 999.2 1007.7 1014.2 1017.3 1023.7 1011.1 MAX. QNH PRESSURE IN HPA 1026.9 1023.5 1020.5 1018.3 1016.4 1003.8 999.0 1002.7 1015.5 1018.1 1023.2 1028.9 1028.9 DAY 27 25 17 16 7 4 25 15 23 31 10 6 MIN. QNH PRESSURE IN HPA 1009.9 1009.3 1004.7 1005.6 1002.4 997.5 994.3 996.3 1000.0 1010.1 1011.5 1014.4 994.3 DAY 31 11 11 30 31 27 11 3 1 5 16 3 MEAN QFF PRESSURE IN HPA 1019.2 1018.5 1015.9 1011.8 1008.5 1000.4 997.3 999.1 1007.7 1014.3 1017.5 1024.0 1011.2 MAX. QFF PRESSURE IN HPA 1027.2 1023.8 1020.8 1018.4 1016.5 1003.8 999.0 1002.6 1015.5 1018.2 1023.5 1029.3 1029.3 DAY 27 25 17 16 7 4 25 15 23 31 10 6 MIN. QFF PRESSURE IN HPA 1010.1 1009.5 1004.9 1005.5 1002.4 997.5 994.2 996.2 1000.0 1010.1 1011.6 1014.6 994.2 DAY 31 11 11 30 31 27 11 9 1 5 16 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.4 14.5 18.6 23.9 32.1 35.9 36.8 37.1 32.3 26.6 18.6 12.1 25.1 MINIMUN AIR TEMPERATURE (C) 7.9 9.3 12.1 16.3 22.7 25.3 27.4 26.7 22.2 16.7 10.0 7.0 17.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 24 30 31 31 20 4 0 0 141 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 1 0 1 TEMPERATURE RECORDS LOWEST(C) 4.0 4.0 8.0 10.5 16.0 22.5 24.0 24.0 17.0 11.5 0.0 3.0 0.0 DAY 24 12 1 6 10 12 7 18 22 17 27 19 MAXIMUM AIR TEMPERATURE (C) 17.8 20.3 25.2 31.4 39.9 44.3 45.1 47.0 41.9 36.5 28.3 18.7 33.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 22 31 30 31 31 30 31 18 0 225 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 24.0 31.0 36.0 45.0 48.5 48.5 50.0 46.0 41.0 35.0 22.5 50.0 DAY 11 3 31 30 22 20 31 3 1 3 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 9.9 11.0 13.1 15.1 17.2 19.0 17.7 20.3 19.7 19.8 18.3 11.7 16.1 MEAN DAILY TEMP. (MDT) (C) 12.9 14.8 18.7 23.9 31.3 34.8 36.2 36.8 32.1 26.6 19.2 12.8 25.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 4.4 91.4 319.3 414.5 472.0 490.8 332.2 173.2 30.0 0.0 2327.8 HEATING DEG. DAYS(BASE 18 0C) 159.6 90.2 12.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 42.5 159.7 464.2 DEWPOINT (MEAN C) 9.2 9.7 9.7 10.1 10.9 17.9 18.3 21.1 16.2 14.8 12.2 9.0 13.2 MIXING RATIO (G/KG) 7.37 7.57 7.67 8.04 8.53 13.59 14.10 17.31 12.11 10.98 9.30 7.20 10.31 VAPOUR PRESSURE (HPA) 11.92 12.18 12.31 12.85 13.57 21.29 21.96 26.82 19.11 17.47 14.91 11.64 16.33 SATURATION DEF. (HPA) 2.91 4.76 9.89 18.26 36.87 40.97 42.92 40.23 32.55 19.84 8.62 2.95 21.73 RELATIVE HUMIDITY (MEAN %) 83 75 60 47 31 38 37 43 41 52 68 83 55 RELATIVE HUMIDITY (MAX. %) 95 90 82 73 54 59 58 65 62 71 85 95 74 RELATIVE HUMIDITY (MIN. %) 64 53 37 25 15 22 22 27 24 31 49 64 36 RELATIVE HUMIDITY (MEAN% 03UTC) 91 87 78 68 49 57 56 58 56 67 81 92 70 RELATIVE HUMIDITY (MEAN% 09UTC) 75 63 47 33 20 27 27 31 28 38 53 67 42 RELATIVE HUMIDITY (MEAN% 15UTC) 77 68 48 33 19 24 26 36 33 49 70 84 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.0 36.5 27.2 27.9 0.0 2.0 0.0 0.0 0.0 0.0 2.4 63.7 189.7 DAYS WITH PRECIPITATION >=10 1 1 1 1 0 0 0 0 0 0 0 3 7 DAYS WITH PRECIPITATION >= 5 2 3 3 3 0 0 0 0 0 0 0 4 15 DAYS WITH PRECIPITATION >= 1 5 7 4 5 0 1 0 0 0 0 1 6 29 DAYS WITH PRECIPITATION 5 8 5 6 0 1 0 0 0 0 2 8 35 GREATEST DAILY PRECIPITATION 16.0 11.0 13.0 10.1 0.0 2.0 0.0 0.0 0.0 0.0 2.0 22.0 22.0 DAY 12 5 20 23 ** 2 ** ** ** ** 24 4 DAY WITH THUNDER STORM 2 4 1 3 0 1 0 0 0 0 0 2 13 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 2 1 2 4 4 9 6 4 3 1 0 37 WIND DIRECTION (PREVAILING) 315 315 315 180 270 315 270 270 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.8 7.0 10.2 11.2 12.3 11.2 10.7 10.2 9.9 8.8 8.8 7.7 9.6 PREVAILING WIND PERCENT 26.6 15.2 17.7 16.7 21.5 32.5 25.0 25.0 19.6 19.0 28.3 21.0 20.1 CALMS PERCENT OF WIND 49.2 54.9 41.5 35.8 34.4 30.4 22.2 36.7 48.3 50.8 42.5 67.3 42.8 NO. OF WIND OBSERVATION 248 224 248 240 247 240 248 248 240 248 240 248 2919 VECTOR WIND DIRECTION (MEAN) 296 242 280 209 262 289 272 272 278 272 293 312 277 VECTOR WIND MAGNITUDE(KNOTS) 2.2 0.8 1.7 1.6 3.3 5.3 4.5 3.8 2.6 1.9 2.1 2.1 2.5 WIND STEADINESES (MEAN %) 48.9 20.5 28.3 24.2 44.6 70.7 54.2 65.5 52.0 46.3 42.9 87.5 45.5 WIND SPEED (MEAN KNOTS) 4.5 3.9 6.0 6.6 7.4 7.5 8.3 5.8 5.0 4.1 4.9 2.4 5.5 FASTEST WIND DIRECTION 150 130 180 180 360 300 330 320 160 220 310 200 180 FASTEST WIND SPEED (KNOTS) 23 27 39 31 29 29 39 23 29 21 25 29 39 DAY 11 15 25 3 4 22 5 8 20 22 11 11 DAYS WITH SKY CLEAR (0-2)/8 16 14 14 8 18 29 31 31 29 26 20 12 248 DAYS WITH P.CLOUDY (3-6)/8 8 10 9 13 10 1 0 0 1 5 8 10 75 DAYS WITH CLOUDY (7-8)/8 7 4 8 9 3 0 0 0 0 0 2 9 42 DAYS WITH VISIBILITY =< 2 KM 13 5 2 1 0 0 0 0 2 0 0 5 28 DURATION OF SUNSHINE HOURS 152.8 158.1 214.1 228.2 308.3 361.0 344.7 344.8 243.3 ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.0 1013.9 1012.2 1008.5 1004.3 997.8 992.6 995.2 1002.3 1009.0 1013.9 1017.7 1007.1 MAX. QFE PRESSURE IN HPA 1022.3 1020.6 1018.7 1015.1 1009.8 1005.0 996.7 1000.9 1007.7 1016.5 1021.3 1023.4 1023.4 DAY-HOUR 23- 6 10- 6 3- 6 12- 9 2- 6 1- 6 25- 6 12- 6 13- 6 25- 6 30- 6 19- 6 MIN. QFE PRESSURE IN HPA 1011.8 1006.2 1006.3 1002.8 998.8 992.4 986.2 987.7 995.0 1003.9 1006.7 1010.1 986.2 DAY-HOUR 11-12 23- 3 14-15 22-15 23-15 18-15 20-15 3-15 1-15 12-12 6-12 11-15 MEAN QNH PRESSURE IN HPA 1022.0 1017.8 1016.1 1012.4 1008.2 1001.7 996.4 999.0 1006.2 1012.9 1017.8 1021.6 1011.0 MAX. QNH PRESSURE IN HPA 1026.2 1024.5 1022.6 1019.0 1013.7 1008.9 1000.5 1004.8 1011.6 1020.4 1025.2 1027.3 1027.3 DAY-HOUR 23- 6 10- 6 3- 6 12- 9 2- 6 1- 6 25- 6 12- 6 13- 6 25- 6 30- 6 19- 6 MIN. QNH PRESSURE IN HPA 1015.7 1010.1 1010.2 1006.7 1002.7 996.2 990.0 991.5 998.8 1007.8 1010.6 1014.0 990.0 DAY-HOUR 11-12 23- 3 14-15 22-15 23-15 18-15 20-15 3-15 1-15 12-12 6-12 11-15 MEAN QFF PRESSURE IN HPA 1022.3 1018.1 1016.4 1012.5 1008.2 1001.7 996.4 998.9 1006.2 1013.0 1018.1 1022.0 1011.1 MAX. QFF PRESSURE IN HPA 1026.6 1024.9 1022.9 1019.2 1013.7 1008.9 1000.5 1004.8 1011.6 1020.5 1025.6 1027.7 1027.7 DAY-HOUR 23- 6 10- 6 3- 6 12- 9 2- 6 1- 6 25- 6 19- 6 13- 6 25- 6 30- 6 19- 6 MIN. QFF PRESSURE IN HPA 1015.9 1010.3 1010.4 1006.8 1002.7 996.2 990.0 991.4 998.8 1007.8 1010.7 1014.3 990.0 DAY-HOUR 11-12 23- 3 14-15 22-15 23-15 18-15 20-15 3-15 1-15 12-12 6-12 11-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1018.2 1013.8 1012.1 1008.4 1004.3 997.9 992.9 995.3 1002.3 1009.0 1014.0 1017.8 1007.2 MAX. QFE PRESSURE IN HPA 1021.1 1018.9 1017.8 1013.8 1009.5 1003.3 995.5 999.0 1006.6 1014.8 1019.8 1022.2 1022.2 DAY 7 11 3 6 8 3 24 19 22 25 27 18 MIN. QFE PRESSURE IN HPA 1013.3 1008.0 1007.7 1003.8 999.6 993.6 988.6 989.9 996.1 1005.0 1008.2 1010.7 988.6 DAY 12 5 15 23 23 19 21 4 2 22 7 12 MEAN QNH PRESSURE IN HPA 1022.1 1017.7 1016.0 1012.3 1008.2 1001.8 996.7 999.1 1006.2 1012.9 1017.9 1021.7 1011.0 MAX. QNH PRESSURE IN HPA 1025.0 1022.8 1021.7 1017.7 1013.4 1007.2 999.3 1002.9 1010.5 1018.7 1023.7 1026.1 1026.1 DAY 7 11 3 6 8 3 24 19 22 25 27 18 MIN. QNH PRESSURE IN HPA 1017.2 1011.9 1011.6 1007.7 1003.5 997.4 992.4 993.7 999.9 1008.9 1012.1 1014.6 992.4 DAY 12 5 15 23 23 19 21 4 2 22 7 12 MEAN QFF PRESSURE IN HPA 1022.4 1017.9 1016.2 1012.4 1008.2 1001.7 996.7 999.1 1006.2 1013.0 1018.1 1022.1 1011.2 MAX. QFF PRESSURE IN HPA 1025.4 1023.1 1021.9 1017.9 1013.5 1007.2 999.3 1002.8 1010.6 1018.8 1024.1 1026.5 1026.5 DAY 27 11 3 6 8 3 29 19 22 25 27 18 MIN. QFF PRESSURE IN HPA 1017.4 1012.1 1011.8 1007.7 1003.4 997.4 992.4 993.6 999.9 1009.0 1012.2 1014.9 992.4 DAY 12 23 15 23 23 20 21 4 2 22 7 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1013.8 1012.2 1008.7 1004.7 998.3 993.2 995.7 1002.4 1009.0 1014.0 1017.5 1007.3 MAX. QFE PRESSURE IN HPA 1021.0 1018.5 1017.6 1014.3 1008.7 1003.1 996.5 1000.3 1006.5 1014.8 1019.0 1021.7 1021.7 DAY 23 10 3 6 8 1 25 12 22 25 27 19 MIN. QFE PRESSURE IN HPA 1013.2 1006.2 1007.6 1003.4 1000.4 994.1 988.1 991.3 996.5 1004.7 1008.6 1010.2 988.1 DAY 11 23 17 19 23 20 21 4 1 12 7 12 MEAN QNH PRESSURE IN HPA 1021.8 1017.7 1016.1 1012.5 1008.6 1002.1 997.1 999.5 1006.2 1012.9 1017.9 1021.4 1011.2 MAX. QNH PRESSURE IN HPA 1024.9 1022.4 1021.5 1018.2 1012.6 1007.0 1000.3 1004.2 1010.4 1018.7 1022.9 1025.6 1025.6 DAY 23 10 3 6 8 1 25 12 22 25 27 19 MIN. QNH PRESSURE IN HPA 1017.1 1010.1 1011.5 1007.3 1004.3 997.9 991.9 995.1 1000.3 1008.6 1012.5 1014.1 991.9 DAY 11 23 17 19 23 20 21 4 1 12 7 12 MEAN QFF PRESSURE IN HPA 1022.1 1018.0 1016.4 1012.7 1008.7 1002.1 997.0 999.5 1006.3 1013.0 1018.1 1021.8 1011.3 MAX. QFF PRESSURE IN HPA 1025.3 1022.8 1021.8 1018.5 1012.7 1007.0 1000.3 1004.1 1010.5 1018.8 1023.3 1026.0 1026.0 DAY 23 10 3 6 8 1 25 12 22 25 27 19 MIN. QFF PRESSURE IN HPA 1017.4 1010.3 1011.7 1007.4 1004.3 997.9 991.9 995.0 1000.3 1008.6 1012.7 1014.4 991.9 DAY 11 23 17 19 23 20 21 4 1 12 7 12 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1019.2 1015.1 1013.6 1009.7 1005.8 999.0 993.7 996.5 1003.5 1010.5 1015.4 1018.8 1008.4 MAX. QFE PRESSURE IN HPA 1022.3 1020.6 1018.7 1015.0 1009.8 1005.0 996.7 1000.9 1007.7 1016.5 1021.3 1023.4 1023.4 DAY 23 10 3 6 2 1 25 12 13 25 30 19 MIN. QFE PRESSURE IN HPA 1014.7 1008.0 1008.8 1004.5 1002.4 995.0 988.6 991.9 997.6 1006.0 1010.0 1012.9 988.6 DAY 11 23 14 19 16 18 21 4 1 12 6 12 MEAN QNH PRESSURE IN HPA 1023.1 1019.0 1017.5 1013.6 1009.7 1002.9 997.5 1000.4 1007.4 1014.4 1019.3 1022.7 1012.3 MAX. QNH PRESSURE IN HPA 1026.2 1024.5 1022.6 1018.9 1013.7 1008.9 1000.5 1004.8 1011.6 1020.4 1025.2 1027.3 1027.3 DAY 23 10 3 6 2 1 25 12 13 25 30 19 MIN. QNH PRESSURE IN HPA 1018.6 1011.9 1012.7 1008.4 1006.3 998.8 992.4 995.7 1001.4 1009.9 1013.9 1016.8 992.4 DAY 11 23 14 19 16 18 21 4 1 12 6 12 MEAN QFF PRESSURE IN HPA 1023.4 1019.3 1017.7 1013.7 1009.7 1002.8 997.5 1000.3 1007.4 1014.5 1019.5 1023.0 1012.4 MAX. QFF PRESSURE IN HPA 1026.6 1024.9 1022.9 1019.1 1013.7 1008.9 1000.5 1004.8 1011.6 1020.5 1025.6 1027.7 1027.7 DAY 23 10 3 6 2 1 25 19 13 25 30 19 MIN. QFF PRESSURE IN HPA 1018.9 1012.1 1012.9 1008.5 1006.2 998.8 992.4 995.7 1001.4 1009.9 1014.1 1017.1 992.4 DAY 11 23 17 19 23 20 21 4 1 12 6 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.6 1014.7 1013.1 1009.3 1005.1 998.5 993.2 995.8 1002.9 1009.7 1014.4 1018.1 1007.8 MAX. QFE PRESSURE IN HPA 1021.0 1019.5 1018.7 1015.1 1008.9 1004.4 996.3 1000.0 1007.0 1014.9 1020.4 1022.6 1022.6 DAY 19 10 3 12 9 1 25 12 13 25 30 19 MIN. QFE PRESSURE IN HPA 1013.2 1008.0 1008.2 1005.0 1000.5 994.4 988.0 990.7 996.8 1005.6 1008.4 1012.9 988.0 DAY 11 23 14 22 23 18 21 3 1 12 6 5 MEAN QNH PRESSURE IN HPA 1022.5 1018.7 1017.0 1013.2 1009.0 1002.4 997.0 999.7 1006.8 1013.5 1018.3 1022.0 1011.7 MAX. QNH PRESSURE IN HPA 1024.9 1023.4 1022.6 1019.0 1012.8 1008.3 1000.1 1003.9 1010.9 1018.8 1024.3 1026.5 1026.5 DAY 19 10 3 12 9 1 25 12 13 25 30 19 MIN. QNH PRESSURE IN HPA 1017.1 1011.9 1012.1 1008.9 1004.4 998.2 991.8 994.5 1000.6 1009.5 1012.3 1016.8 991.8 DAY 11 23 14 22 23 18 21 3 1 12 6 5 MEAN QFF PRESSURE IN HPA 1022.8 1018.9 1017.2 1013.3 1009.0 1002.4 997.0 999.6 1006.8 1013.6 1018.5 1022.3 1011.8 MAX. QFF PRESSURE IN HPA 1025.2 1023.7 1022.9 1019.2 1012.9 1008.3 1000.1 1003.8 1010.9 1018.9 1024.6 1026.9 1026.9 DAY 19 10 3 12 9 1 25 19 13 30 30 19 MIN. QFF PRESSURE IN HPA 1017.3 1012.1 1012.3 1008.9 1004.3 998.2 991.7 994.4 1000.6 1009.5 1012.4 1017.1 991.7 DAY 11 23 14 22 23 18 21 3 1 12 6 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.2 1013.0 1011.4 1007.9 1003.6 997.2 991.7 994.1 1001.3 1008.1 1012.9 1016.7 1006.2 MAX. QFE PRESSURE IN HPA 1020.0 1018.1 1016.4 1014.2 1008.3 1004.5 994.3 998.1 1005.2 1013.7 1018.7 1021.0 1021.0 DAY 19 10 3 12 12 2 25 18 13 24 30 19 MIN. QFE PRESSURE IN HPA 1011.8 1006.6 1006.6 1003.2 998.9 993.3 986.7 987.8 995.2 1003.9 1006.7 1011.9 986.7 DAY 11 23 14 22 23 18 20 3 1 12 6 4 MEAN QNH PRESSURE IN HPA 1021.1 1016.9 1015.2 1011.8 1007.5 1001.0 995.5 998.0 1005.2 1011.9 1016.8 1020.6 1010.1 MAX. QNH PRESSURE IN HPA 1023.9 1022.0 1020.3 1018.1 1012.2 1008.4 998.1 1001.9 1009.1 1017.6 1022.6 1024.9 1024.9 DAY 19 10 3 12 12 2 25 18 13 24 30 19 MIN. QNH PRESSURE IN HPA 1015.7 1010.5 1010.5 1007.1 1002.8 997.1 990.5 991.6 999.0 1007.8 1010.6 1015.8 990.5 DAY 11 23 14 22 23 18 20 3 1 12 6 4 MEAN QFF PRESSURE IN HPA 1021.4 1017.2 1015.5 1011.9 1007.5 1001.0 995.4 997.9 1005.2 1012.0 1017.0 1020.9 1010.2 MAX. QFF PRESSURE IN HPA 1024.2 1022.3 1020.5 1018.3 1012.3 1008.4 998.1 1001.9 1009.1 1017.7 1022.9 1025.3 1025.3 DAY 19 10 3 12 12 2 25 24 13 24 30 19 MIN. QFF PRESSURE IN HPA 1015.9 1010.7 1010.7 1007.1 1002.7 997.1 990.4 991.5 999.0 1007.8 1010.7 1016.1 990.4 DAY 11 23 14 22 23 18 20 3 1 12 6 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.2 1013.1 1011.2 1007.5 1003.0 996.6 991.1 993.7 1001.3 1008.1 1013.0 1017.1 1006.1 MAX. QFE PRESSURE IN HPA 1020.3 1018.2 1016.2 1014.2 1007.8 1002.5 993.8 997.7 1005.2 1013.7 1018.9 1021.5 1021.5 DAY 19 10 3 12 7 1 28 12 21 24 30 19 MIN. QFE PRESSURE IN HPA 1011.9 1007.1 1006.3 1002.8 998.8 992.4 986.2 987.7 995.0 1003.9 1007.1 1010.1 986.2 DAY 11 23 14 22 23 18 20 3 1 12 6 11 MEAN QNH PRESSURE IN HPA 1021.1 1017.0 1015.1 1011.4 1006.9 1000.5 994.9 997.6 1005.1 1012.0 1016.9 1021.0 1009.9 MAX. QNH PRESSURE IN HPA 1024.2 1022.1 1020.1 1018.1 1011.7 1006.4 997.6 1001.5 1009.1 1017.6 1022.8 1025.4 1025.4 DAY 19 10 3 12 7 1 28 12 21 24 30 19 MIN. QNH PRESSURE IN HPA 1015.8 1011.0 1010.2 1006.7 1002.7 996.2 990.0 991.5 998.8 1007.8 1011.0 1014.0 990.0 DAY 11 23 14 22 23 18 20 3 1 12 6 11 MEAN QFF PRESSURE IN HPA 1021.4 1017.3 1015.3 1011.6 1006.9 1000.4 994.9 997.5 1005.2 1012.1 1017.2 1021.3 1010.1 MAX. QFF PRESSURE IN HPA 1024.5 1022.5 1020.4 1018.3 1011.8 1006.4 997.6 1001.5 1009.1 1017.7 1023.1 1025.8 1025.8 DAY 19 10 3 12 7 1 28 18 21 24 30 19 MIN. QFF PRESSURE IN HPA 1016.1 1011.2 1010.4 1006.8 1002.7 996.2 990.0 991.4 998.8 1007.8 1011.2 1014.3 990.0 DAY 11 23 14 22 23 18 20 3 1 12 6 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1018.0 1013.8 1012.1 1008.1 1003.8 997.5 992.2 994.9 1002.2 1008.8 1013.9 1017.8 1006.9 MAX. QFE PRESSURE IN HPA 1021.5 1018.9 1016.9 1014.5 1008.4 1002.7 995.8 998.8 1006.5 1015.4 1019.4 1022.3 1022.3 DAY 19 10 2 5 7 1 28 18 21 24 30 19 MIN. QFE PRESSURE IN HPA 1012.8 1009.4 1007.6 1003.2 999.6 992.9 987.4 988.9 995.2 1004.4 1007.0 1010.4 987.4 DAY 11 4 14 22 22 18 20 3 4 21 6 11 MEAN QNH PRESSURE IN HPA 1021.9 1017.7 1016.0 1012.0 1007.7 1001.3 996.1 998.7 1006.0 1012.7 1017.8 1021.7 1010.8 MAX. QNH PRESSURE IN HPA 1025.4 1022.8 1020.8 1018.4 1012.3 1006.6 999.6 1002.7 1010.4 1019.3 1023.3 1026.2 1026.2 DAY 19 10 2 5 7 1 28 18 21 24 30 19 MIN. QNH PRESSURE IN HPA 1016.7 1013.3 1011.5 1007.1 1003.5 996.7 991.2 992.7 999.0 1008.3 1010.9 1014.3 991.2 DAY 11 4 14 22 22 18 20 3 4 21 6 11 MEAN QFF PRESSURE IN HPA 1022.2 1018.0 1016.2 1012.1 1007.7 1001.3 996.0 998.7 1006.0 1012.8 1018.0 1022.1 1010.9 MAX. QFF PRESSURE IN HPA 1025.8 1023.2 1021.1 1018.6 1012.4 1006.6 999.6 1002.6 1010.4 1019.4 1023.6 1026.6 1026.6 DAY 19 10 2 5 7 1 28 18 21 24 30 19 MIN. QFF PRESSURE IN HPA 1017.0 1013.5 1011.7 1007.1 1003.4 996.7 991.2 992.7 999.0 1008.4 1011.1 1014.6 991.2 DAY 11 4 14 22 22 18 20 3 4 21 6 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1014.0 1012.5 1008.5 1004.4 997.9 992.8 995.4 1002.8 1009.3 1014.3 1018.0 1007.4 MAX. QFE PRESSURE IN HPA 1021.1 1019.2 1017.5 1013.8 1009.1 1003.2 996.3 999.2 1007.0 1015.8 1020.1 1021.8 1021.8 DAY 6 10 2 11 7 2 28 23 21 24 30 17 MIN. QFE PRESSURE IN HPA 1013.3 1008.8 1007.7 1003.8 1000.0 993.9 986.8 989.7 996.0 1005.0 1007.6 1011.0 986.8 DAY 11 4 14 22 22 18 20 3 4 11 6 11 MEAN QNH PRESSURE IN HPA 1022.3 1017.9 1016.3 1012.4 1008.2 1001.8 996.7 999.3 1006.7 1013.2 1018.2 1022.0 1011.2 MAX. QNH PRESSURE IN HPA 1025.0 1023.1 1021.4 1017.7 1013.0 1007.1 1000.1 1003.1 1010.9 1019.7 1024.0 1025.7 1025.7 DAY 6 10 2 11 7 2 28 23 21 24 30 17 MIN. QNH PRESSURE IN HPA 1017.2 1012.7 1011.6 1007.7 1003.9 997.7 990.6 993.5 999.8 1008.9 1011.5 1014.9 990.6 DAY 11 4 14 22 22 18 20 3 4 11 6 11 MEAN QFF PRESSURE IN HPA 1022.6 1018.2 1016.6 1012.5 1008.2 1001.8 996.6 999.2 1006.7 1013.3 1018.4 1022.3 1011.4 MAX. QFF PRESSURE IN HPA 1025.3 1023.4 1021.6 1017.8 1013.1 1007.0 1000.1 1003.0 1010.9 1019.8 1024.3 1026.1 1026.1 DAY 6 10 2 5 7 2 28 23 21 24 30 18 MIN. QFF PRESSURE IN HPA 1017.4 1012.9 1011.8 1007.7 1003.8 997.7 990.5 993.4 999.8 1008.9 1011.6 1015.2 990.5 DAY 11 4 14 22 22 18 20 3 4 11 6 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.0 16.1 18.1 24.7 32.8 35.8 39.2 38.1 33.1 26.2 19.6 16.6 26.1 MINIMUN AIR TEMPERATURE (C) 8.5 11.0 11.8 16.6 23.5 24.2 29.1 28.2 23.0 16.8 12.7 10.2 18.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 28 27 31 31 24 3 0 0 146 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) 3.0 3.0 6.5 12.0 18.5 19.5 26.0 24.0 18.0 11.5 6.0 3.5 3.0 DAY 22 6 5 11 1 7 9 24 24 31 13 17 MAXIMUM AIR TEMPERATURE (C) 18.3 21.8 24.7 32.9 42.0 45.9 49.6 48.1 43.8 36.5 28.1 24.1 34.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 24 31 30 31 31 30 30 8 0 217 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.5 26.5 31.0 40.0 46.5 50.0 53.0 52.0 48.0 44.5 33.0 28.0 53.0 DAY 2 8 31 23 28 17 19 12 13 2 3 4 DIF. BETWEEN (MAX.-MIN.) (C) 9.8 10.8 12.9 16.3 18.5 21.7 20.5 19.9 20.8 19.7 15.4 13.9 16.6 MEAN DAILY TEMP. (MDT) (C) 13.4 16.4 18.3 24.7 32.7 35.0 39.3 38.1 33.4 26.6 20.4 17.2 26.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 5.5 112.9 363.0 421.5 568.6 530.8 372.2 176.5 18.8 0.0 2569.9 HEATING DEG. DAYS(BASE 18 0C) 143.5 51.1 26.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.3 38.3 262.6 DEWPOINT (MEAN C) 9.8 12.3 14.1 18.0 21.4 22.1 26.4 26.3 23.5 16.8 13.4 13.0 18.1 MIXING RATIO (G/KG) 7.66 9.09 10.29 13.41 16.62 17.66 23.18 22.78 19.32 12.56 9.94 9.47 14.33 VAPOUR PRESSURE (HPA) 12.34 14.58 16.41 21.24 26.08 27.47 35.60 35.12 30.06 19.92 15.94 15.24 22.50 SATURATION DEF. (HPA) 3.10 4.28 5.11 11.84 26.91 35.34 39.40 35.39 24.63 16.73 8.19 4.46 17.95 RELATIVE HUMIDITY (MEAN %) 83 80 79 69 54 48 51 55 60 59 70 81 66 RELATIVE HUMIDITY (MAX. %) 95 93 94 89 77 69 71 77 80 80 83 94 84 RELATIVE HUMIDITY (MIN. %) 65 62 60 49 35 30 34 35 40 38 52 62 47 RELATIVE HUMIDITY (MEAN% 03UTC) 91 90 91 86 69 63 64 72 75 75 81 91 79 RELATIVE HUMIDITY (MEAN% 09UTC) 70 67 65 55 41 36 42 41 46 46 55 67 53 RELATIVE HUMIDITY (MEAN% 15UTC) 80 78 77 61 43 37 41 40 52 54 70 80 59 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 77.0 95.8 75.1 38.4 3.5 0.0 0.5 0.0 0.0 0.0 9.8 24.0 324.1 DAYS WITH PRECIPITATION >=10 4 5 2 1 0 0 0 0 0 0 0 1 13 DAYS WITH PRECIPITATION >= 5 6 6 5 2 0 0 0 0 0 0 1 2 22 DAYS WITH PRECIPITATION >= 1 9 10 7 5 2 0 0 0 0 0 1 5 39 DAYS WITH PRECIPITATION 9 11 8 8 2 0 1 0 0 0 3 6 48 GREATEST DAILY PRECIPITATION 23.0 19.0 25.0 24.0 2.5 0.0 0.5 0.0 0.0 0.0 9.0 10.0 25.0 DAY 6 4 12 14 11 ** 16 ** ** ** 22 11 DAY WITH THUNDER STORM 1 2 6 1 4 0 1 1 0 0 0 4 20 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 6 4 0 6 3 1 5 6 5 2 1 39 WIND DIRECTION (PREVAILING) 315 180 315 315 270 315 270 270 270 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 7.5 11.8 7.1 8.3 8.1 10.3 7.9 9.1 9.2 9.1 7.7 7.3 8.5 PREVAILING WIND PERCENT 10.5 12.1 13.7 21.7 16.5 21.7 14.9 17.7 25.8 20.6 27.5 16.5 15.1 CALMS PERCENT OF WIND 64.5 59.1 54.8 47.5 52.4 50.8 55.6 48.0 58.8 47.6 37.1 50.8 52.3 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 161 179 186 261 290 287 259 241 291 285 295 236 265 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.4 1.4 0.9 2.3 2.7 2.3 2.1 2.4 2.1 2.6 0.8 1.4 WIND STEADINESES (MEAN %) 25.0 35.9 35.0 20.0 53.5 64.3 59.0 44.7 64.9 45.7 53.1 20.0 33.3 WIND SPEED (MEAN KNOTS) 3.2 3.9 4.0 4.5 4.3 4.2 3.9 4.7 3.7 4.6 4.9 4.0 4.2 FASTEST WIND DIRECTION 130 300 170 150 60 300 80 110 290 160 280 190 300 FASTEST WIND SPEED (KNOTS) 29 39 29 21 35 21 37 29 39 25 23 29 39 DAY 5 4 2 14 11 21 16 27 18 9 9 10 DAYS WITH SKY CLEAR (0-2)/8 9 9 7 13 16 29 21 28 29 27 14 14 216 DAYS WITH P.CLOUDY (3-6)/8 13 10 17 9 10 0 10 3 0 4 12 11 99 DAYS WITH CLOUDY (7-8)/8 9 10 7 8 5 1 0 0 1 0 4 6 51 DAYS WITH VISIBILITY =< 2 KM 5 2 3 0 0 0 0 0 3 1 1 2 17 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.3 1012.3 1009.6 1008.3 1003.1 997.4 994.0 995.9 1000.8 1009.3 1014.4 1016.9 1006.4 MAX. QFE PRESSURE IN HPA 1022.1 1018.2 1017.9 1013.2 1009.4 1004.0 1002.0 1002.1 1010.1 1014.8 1021.4 1021.1 1022.1 DAY-HOUR 25- 6 6- 6 29- 6 8- 6 11-21 7- 6 3- 6 27- 6 25- 6 31- 6 16- 6 4- 6 MIN. QFE PRESSURE IN HPA 1000.3 1005.2 1002.3 1001.4 996.4 991.3 989.3 989.7 995.8 1001.0 1008.3 1012.7 989.3 DAY-HOUR 12- 3 10-12 12-15 12-15 28-15 17-15 25-15 14-15 15-15 4-12 6-12 15- 0 MEAN QNH PRESSURE IN HPA 1019.2 1016.2 1013.5 1012.1 1007.0 1001.2 997.8 999.7 1004.7 1013.2 1018.3 1020.8 1010.3 MAX. QNH PRESSURE IN HPA 1026.0 1022.1 1021.8 1017.1 1013.3 1007.9 1005.9 1006.0 1014.0 1018.7 1025.3 1025.0 1026.0 DAY-HOUR 25- 6 6- 6 29- 6 8- 6 11-21 7- 6 3- 6 27- 6 25- 6 31- 6 16- 6 4- 6 MIN. QNH PRESSURE IN HPA 1004.2 1009.1 1006.2 1005.3 1000.2 995.1 993.1 993.5 999.6 1004.9 1012.2 1016.6 993.1 DAY-HOUR 12- 3 10-12 12-15 12-15 28-15 17-15 25-15 14-15 15-15 4-12 6-12 15- 0 MEAN QFF PRESSURE IN HPA 1019.5 1016.4 1013.7 1012.3 1007.0 1001.2 997.7 999.7 1004.7 1013.3 1018.5 1021.1 1010.4 MAX. QFF PRESSURE IN HPA 1026.4 1022.5 1022.1 1017.3 1013.4 1007.9 1005.8 1005.9 1014.0 1018.9 1025.5 1025.3 1026.4 DAY-HOUR 25- 6 6- 6 29- 6 15- 9 11-21 7- 6 3- 6 27- 6 25- 6 31- 6 16- 6 4- 6 MIN. QFF PRESSURE IN HPA 1004.4 1009.3 1006.4 1005.4 1000.2 995.1 993.0 993.4 999.6 1004.9 1012.3 1016.8 993.0 DAY-HOUR 12- 3 10-12 12-15 12-15 28-15 17-15 25-15 14-15 15-15 4-12 6-12 15- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1015.3 1012.2 1009.7 1008.2 1003.1 997.4 994.1 995.7 1000.7 1009.0 1014.3 1016.7 1006.4 MAX. QFE PRESSURE IN HPA 1020.9 1017.3 1016.0 1011.8 1007.1 1001.5 999.3 999.9 1007.5 1014.0 1019.6 1019.6 1020.9 DAY 26 7 29 8 1 7 3 29 26 31 16 28 MIN. QFE PRESSURE IN HPA 1002.9 1005.9 1004.4 1003.9 997.7 992.5 990.7 991.6 997.6 1002.0 1009.8 1012.7 990.7 DAY 12 5 23 3 29 18 26 4 16 4 7 15 MEAN QNH PRESSURE IN HPA 1019.2 1016.1 1013.6 1012.1 1007.0 1001.3 997.9 999.6 1004.6 1012.9 1018.2 1020.6 1010.2 MAX. QNH PRESSURE IN HPA 1024.8 1021.2 1019.9 1015.7 1011.0 1005.4 1003.2 1003.8 1011.4 1017.9 1023.5 1023.5 1024.8 DAY 26 7 29 8 1 7 3 29 26 31 16 28 MIN. QNH PRESSURE IN HPA 1006.8 1009.8 1008.3 1007.8 1001.5 996.3 994.5 995.4 1001.4 1005.9 1013.7 1016.6 994.5 DAY 12 5 23 3 29 18 26 4 16 4 7 15 MEAN QFF PRESSURE IN HPA 1019.5 1016.2 1013.8 1012.2 1007.0 1001.3 997.8 999.5 1004.5 1013.0 1018.4 1020.8 1010.3 MAX. QFF PRESSURE IN HPA 1025.1 1021.1 1020.1 1015.8 1011.0 1005.3 1003.1 1003.7 1011.4 1018.0 1023.7 1023.8 1025.1 DAY 26 6 29 8 1 7 3 29 26 31 16 28 MIN. QFF PRESSURE IN HPA 1007.0 1010.1 1008.4 1007.9 1001.5 996.3 994.4 995.3 1001.4 1005.9 1013.8 1016.8 994.4 DAY 12 5 23 3 29 18 26 4 16 4 7 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1014.9 1012.3 1009.6 1008.6 1003.3 997.8 994.7 996.3 1001.0 1009.3 1014.4 1016.9 1006.6 MAX. QFE PRESSURE IN HPA 1020.7 1016.9 1016.8 1012.4 1007.4 1003.0 1001.0 1000.2 1008.8 1014.4 1020.0 1019.6 1020.7 DAY 26 6 29 8 17 7 3 27 25 31 16 28 MIN. QFE PRESSURE IN HPA 1000.3 1006.9 1004.1 1004.8 997.8 993.1 991.2 991.7 997.9 1002.3 1010.3 1014.4 991.2 DAY 12 16 7 18 29 17 15 14 15 4 3 14 MEAN QNH PRESSURE IN HPA 1018.8 1016.2 1013.5 1012.5 1007.2 1001.7 998.5 1000.1 1004.9 1013.2 1018.3 1020.8 1010.5 MAX. QNH PRESSURE IN HPA 1024.6 1020.8 1020.7 1016.3 1011.3 1006.9 1004.9 1004.1 1012.7 1018.3 1023.9 1023.5 1024.6 DAY 26 6 29 8 17 7 3 27 25 31 16 28 MIN. QNH PRESSURE IN HPA 1004.2 1010.8 1008.0 1008.7 1001.6 996.9 995.0 995.5 1001.7 1006.2 1014.2 1018.3 995.0 DAY 12 16 7 18 29 17 15 14 15 4 3 14 MEAN QFF PRESSURE IN HPA 1019.1 1016.4 1013.8 1012.7 1007.2 1001.7 998.4 1000.0 1004.9 1013.4 1018.5 1021.1 1010.6 MAX. QFF PRESSURE IN HPA 1025.0 1021.2 1021.0 1016.5 1011.3 1006.9 1004.8 1004.1 1012.8 1018.5 1024.1 1023.8 1025.0 DAY 26 6 29 8 17 7 3 28 25 31 16 28 MIN. QFF PRESSURE IN HPA 1004.4 1011.0 1008.2 1008.8 1001.6 996.9 995.0 995.5 1001.8 1006.2 1014.4 1018.5 995.0 DAY 12 16 7 18 29 17 15 14 15 4 3 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.5 1013.5 1010.7 1009.7 1004.4 998.6 995.3 997.3 1002.1 1010.7 1015.7 1018.4 1007.7 MAX. QFE PRESSURE IN HPA 1022.1 1018.2 1017.9 1013.2 1008.1 1004.0 1002.0 1002.1 1010.1 1014.8 1021.4 1021.1 1022.1 DAY 25 6 29 8 17 7 3 27 25 31 16 4 MIN. QFE PRESSURE IN HPA 1002.1 1008.0 1003.6 1005.9 999.0 993.4 992.0 992.7 997.8 1004.1 1011.4 1015.7 992.0 DAY 12 16 7 18 29 17 6 14 15 4 6 14 MEAN QNH PRESSURE IN HPA 1020.4 1017.4 1014.6 1013.6 1008.2 1002.4 999.1 1001.1 1005.9 1014.5 1019.6 1022.3 1011.6 MAX. QNH PRESSURE IN HPA 1026.0 1022.1 1021.8 1017.1 1012.0 1007.9 1005.9 1006.0 1014.0 1018.7 1025.3 1025.0 1026.0 DAY 25 6 29 8 17 7 3 27 25 31 16 4 MIN. QNH PRESSURE IN HPA 1006.0 1011.9 1007.5 1009.8 1002.9 997.2 995.8 996.5 1001.6 1008.0 1015.3 1019.6 995.8 DAY 12 16 7 18 29 17 6 14 15 4 6 14 MEAN QFF PRESSURE IN HPA 1020.7 1017.7 1014.8 1013.7 1008.2 1002.4 999.1 1001.1 1006.0 1014.7 1019.8 1022.6 1011.7 MAX. QFF PRESSURE IN HPA 1026.4 1022.5 1022.1 1017.2 1012.0 1007.9 1005.8 1005.9 1014.0 1018.9 1025.5 1025.3 1026.4 DAY 25 6 29 8 17 7 3 27 25 31 16 4 MIN. QFF PRESSURE IN HPA 1006.3 1012.1 1007.7 1009.9 1002.8 997.2 995.7 996.5 1001.7 1008.0 1015.5 1019.9 995.7 DAY 12 16 7 18 29 17 6 14 15 4 6 14 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1015.9 1013.0 1010.2 1009.2 1004.0 998.1 994.6 996.6 1001.5 1009.9 1014.8 1017.5 1007.1 MAX. QFE PRESSURE IN HPA 1022.0 1018.1 1016.7 1013.2 1008.1 1003.5 1001.0 1001.2 1009.2 1013.8 1020.0 1020.5 1022.0 DAY 25 6 28 15 4 7 3 27 25 18 16 28 MIN. QFE PRESSURE IN HPA 1002.9 1007.4 1003.8 1004.4 999.7 993.7 991.4 991.5 997.1 1002.9 1010.4 1014.5 991.4 DAY 12 16 7 12 29 17 25 14 15 4 6 14 MEAN QNH PRESSURE IN HPA 1019.8 1016.9 1014.1 1013.0 1007.8 1001.9 998.5 1000.4 1005.4 1013.7 1018.7 1021.4 1011.0 MAX. QNH PRESSURE IN HPA 1025.9 1022.0 1020.6 1017.1 1012.0 1007.4 1004.9 1005.1 1013.1 1017.7 1023.9 1024.4 1025.9 DAY 25 6 28 15 4 7 3 27 25 18 16 28 MIN. QNH PRESSURE IN HPA 1006.8 1011.3 1007.7 1008.3 1003.6 997.5 995.2 995.3 1000.9 1006.8 1014.3 1018.4 995.2 DAY 12 16 7 12 29 17 25 14 15 4 6 14 MEAN QFF PRESSURE IN HPA 1020.1 1017.1 1014.3 1013.1 1007.8 1001.9 998.3 1000.3 1005.3 1013.8 1018.9 1021.6 1011.1 MAX. QFF PRESSURE IN HPA 1026.2 1022.3 1020.8 1017.3 1012.0 1007.3 1004.8 1005.0 1013.1 1017.8 1024.1 1024.6 1026.2 DAY 25 6 28 15 4 7 3 27 25 18 16 28 MIN. QFF PRESSURE IN HPA 1007.1 1011.5 1007.9 1008.4 1003.5 997.4 995.1 995.2 1000.9 1006.8 1014.4 1018.6 995.1 DAY 12 16 7 12 29 17 25 14 15 4 6 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.5 1011.3 1008.7 1007.5 1002.4 996.6 993.1 994.9 999.8 1008.3 1013.4 1015.9 1005.5 MAX. QFE PRESSURE IN HPA 1020.7 1016.6 1015.6 1012.2 1005.4 1001.9 999.4 999.4 1007.4 1012.3 1018.6 1018.3 1020.7 DAY 25 6 28 8 4 7 3 28 25 17 15 8 MIN. QFE PRESSURE IN HPA 1003.9 1005.2 1002.7 1001.6 997.9 992.1 989.7 990.0 995.9 1001.0 1008.3 1012.8 989.7 DAY 12 10 12 12 28 17 25 14 15 4 6 14 MEAN QNH PRESSURE IN HPA 1018.4 1015.2 1012.5 1011.4 1006.2 1000.5 996.9 998.7 1003.6 1012.1 1017.3 1019.8 1009.4 MAX. QNH PRESSURE IN HPA 1024.6 1020.5 1019.5 1016.1 1009.3 1005.8 1003.3 1003.3 1011.3 1016.2 1022.5 1022.2 1024.6 DAY 25 6 28 8 4 7 3 28 25 17 15 8 MIN. QNH PRESSURE IN HPA 1007.8 1009.1 1006.6 1005.5 1001.7 995.9 993.5 993.8 999.7 1004.9 1012.2 1016.7 993.5 DAY 12 10 12 12 28 17 25 14 15 4 6 14 MEAN QFF PRESSURE IN HPA 1018.7 1015.3 1012.7 1011.5 1006.2 1000.4 996.8 998.6 1003.6 1012.2 1017.5 1020.0 1009.5 MAX. QFF PRESSURE IN HPA 1024.9 1020.8 1019.7 1016.2 1009.2 1005.7 1003.1 1003.2 1011.3 1016.3 1022.6 1022.4 1024.9 DAY 25 6 28 8 4 7 3 28 25 17 15 28 MIN. QFF PRESSURE IN HPA 1008.1 1009.3 1006.8 1005.6 1001.7 995.8 993.4 993.7 999.7 1004.9 1012.3 1016.9 993.4 DAY 12 10 12 12 28 17 25 14 15 4 6 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1014.8 1011.4 1008.7 1007.1 1001.9 996.0 992.6 994.5 999.7 1008.5 1013.7 1016.1 1005.4 MAX. QFE PRESSURE IN HPA 1020.8 1015.9 1015.7 1011.5 1004.8 1000.8 998.0 999.3 1007.5 1012.7 1019.2 1018.7 1020.8 DAY 25 6 28 7 4 7 3 27 25 17 15 27 MIN. QFE PRESSURE IN HPA 1005.9 1005.6 1002.3 1001.4 996.4 991.3 989.3 989.7 995.8 1001.6 1008.5 1012.8 989.3 DAY 11 10 12 12 28 17 25 14 15 4 6 14 MEAN QNH PRESSURE IN HPA 1018.7 1015.3 1012.6 1011.0 1005.7 999.9 996.4 998.4 1003.6 1012.3 1017.6 1020.0 1009.3 MAX. QNH PRESSURE IN HPA 1024.7 1019.8 1019.6 1015.4 1008.7 1004.7 1001.8 1003.2 1011.4 1016.6 1023.1 1022.6 1024.7 DAY 25 6 28 7 4 7 3 27 25 17 15 27 MIN. QNH PRESSURE IN HPA 1009.8 1009.5 1006.2 1005.3 1000.2 995.1 993.1 993.5 999.6 1005.5 1012.4 1016.7 993.1 DAY 11 10 12 12 28 17 25 14 15 4 6 14 MEAN QFF PRESSURE IN HPA 1019.0 1015.5 1012.8 1011.1 1005.7 999.9 996.4 998.3 1003.6 1012.5 1017.8 1020.3 1009.4 MAX. QFF PRESSURE IN HPA 1025.1 1020.2 1019.9 1015.6 1008.7 1004.7 1001.7 1003.1 1011.4 1016.8 1023.3 1022.9 1025.1 DAY 25 6 28 7 4 7 3 27 25 17 15 27 MIN. QFF PRESSURE IN HPA 1010.1 1009.7 1006.4 1005.4 1000.2 995.1 993.0 993.4 999.6 1005.5 1012.6 1016.9 993.0 DAY 11 10 12 12 28 17 25 14 15 4 6 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1012.3 1009.4 1007.8 1002.8 997.0 993.5 995.9 1000.8 1009.4 1014.5 1016.8 1006.3 MAX. QFE PRESSURE IN HPA 1021.4 1017.3 1017.0 1012.0 1008.6 1001.2 999.2 1001.5 1008.2 1013.6 1020.4 1019.4 1021.4 DAY 25 6 28 7 11 7 3 27 25 17 15 27 MIN. QFE PRESSURE IN HPA 1002.0 1006.3 1004.4 1004.5 997.2 992.2 990.1 991.2 997.0 1003.2 1009.0 1013.2 990.1 DAY 11 4 22 2 28 17 25 14 15 5 6 14 MEAN QNH PRESSURE IN HPA 1019.3 1016.2 1013.3 1011.6 1006.7 1000.8 997.4 999.7 1004.6 1013.3 1018.4 1020.8 1010.2 MAX. QNH PRESSURE IN HPA 1025.3 1021.2 1020.9 1015.9 1012.5 1005.1 1003.1 1005.4 1012.1 1017.5 1024.3 1023.3 1025.3 DAY 25 6 28 7 11 7 3 27 25 17 15 27 MIN. QNH PRESSURE IN HPA 1005.9 1010.2 1008.3 1008.4 1001.0 996.0 993.9 995.0 1000.8 1007.1 1012.9 1017.1 993.9 DAY 11 4 22 2 28 17 25 14 15 5 6 14 MEAN QFF PRESSURE IN HPA 1019.6 1016.5 1013.5 1011.8 1006.7 1000.8 997.3 999.7 1004.6 1013.4 1018.6 1021.0 1010.3 MAX. QFF PRESSURE IN HPA 1025.7 1021.6 1021.2 1016.1 1012.6 1005.1 1003.0 1005.3 1012.1 1017.6 1024.5 1023.6 1025.7 DAY 25 6 28 7 11 7 3 27 25 17 15 27 MIN. QFF PRESSURE IN HPA 1006.1 1010.5 1008.5 1008.5 1001.0 995.9 993.8 994.9 1000.8 1007.1 1013.0 1017.3 993.8 DAY 11 4 22 2 28 17 25 14 15 5 6 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1012.5 1009.7 1008.2 1003.4 997.5 994.2 996.2 1001.2 1009.6 1014.6 1017.1 1006.7 MAX. QFE PRESSURE IN HPA 1021.8 1017.6 1016.3 1012.5 1009.4 1001.4 999.7 1000.4 1008.1 1014.1 1019.7 1020.2 1021.8 DAY 25 6 27 7 11 7 2 28 25 30 15 27 MIN. QFE PRESSURE IN HPA 1002.8 1006.3 1003.8 1004.0 997.7 992.9 990.8 991.7 997.6 1003.4 1009.6 1013.1 990.8 DAY 11 4 22 2 28 17 25 14 15 3 6 14 MEAN QNH PRESSURE IN HPA 1019.4 1016.4 1013.6 1012.1 1007.3 1001.4 998.1 1000.1 1005.0 1013.5 1018.5 1021.0 1010.5 MAX. QNH PRESSURE IN HPA 1025.7 1021.5 1020.2 1016.4 1013.3 1005.3 1003.6 1004.3 1012.0 1018.0 1023.6 1024.1 1025.7 DAY 25 6 27 7 11 7 2 28 25 30 15 27 MIN. QNH PRESSURE IN HPA 1006.7 1010.2 1007.7 1007.9 1001.5 996.7 994.6 995.5 1001.4 1007.3 1013.5 1017.0 994.6 DAY 11 4 22 2 28 17 25 14 15 3 6 14 MEAN QFF PRESSURE IN HPA 1019.6 1016.7 1013.8 1012.2 1007.3 1001.3 997.9 1000.0 1005.0 1013.6 1018.7 1021.2 1010.6 MAX. QFF PRESSURE IN HPA 1026.0 1021.8 1020.4 1016.6 1013.4 1005.3 1003.5 1004.2 1012.0 1018.1 1023.8 1024.4 1026.0 DAY 25 6 27 7 11 7 2 28 25 30 15 27 MIN. QFF PRESSURE IN HPA 1006.9 1010.4 1007.9 1008.0 1001.5 996.6 994.5 995.4 1001.4 1007.3 1013.6 1017.2 994.5 DAY 11 4 22 2 28 17 25 14 15 3 6 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.5 12.8 16.6 23.0 31.4 36.4 37.1 35.9 32.9 28.1 19.4 13.5 25.1 MINIMUN AIR TEMPERATURE (C) 7.7 4.5 10.3 15.9 22.4 26.7 27.0 25.9 22.3 21.1 14.0 9.8 17.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 22 28 31 31 24 19 0 0 157 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 4 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS LOWEST(C) 3.0 -3.5 2.5 6.5 15.5 19.0 24.5 24.0 18.0 14.5 9.5 5.5 -3.5 DAY 4 8 8 12 6 4 8 21 16 26 25 27 MAXIMUM AIR TEMPERATURE (C) 20.0 20.9 22.8 30.1 39.7 45.2 46.3 45.6 43.3 36.2 25.6 17.9 32.8 DAYS WITH MAXIMUM TEMP. >=30 0 1 0 18 30 30 31 31 30 29 3 0 203 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.0 33.5 27.0 36.0 47.0 50.0 49.0 50.0 46.0 44.0 32.0 23.0 50.0 DAY 11 21 4 28 29 15 26 12 3 6 2 4 DIF. BETWEEN (MAX.-MIN.) (C) 12.3 16.4 12.5 14.2 17.3 18.5 19.3 19.7 21.0 15.1 11.6 8.1 15.5 MEAN DAILY TEMP. (MDT) (C) 13.8 12.7 16.5 23.0 31.0 35.9 36.6 35.7 32.8 28.6 19.8 13.9 25.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 2.3 0.5 83.5 311.2 448.5 485.0 457.2 353.5 236.1 25.4 0.0 2403.4 HEATING DEG. DAYS(BASE 18 0C) 130.2 157.3 55.0 7.8 0.0 0.0 0.0 0.0 0.0 0.0 11.2 128.7 490.1 DEWPOINT (MEAN C) 9.2 5.3 11.5 14.6 18.8 21.0 22.8 23.7 25.8 22.9 16.9 12.4 17.1 MIXING RATIO (G/KG) 7.32 5.82 8.68 10.78 14.09 16.54 18.44 19.47 22.80 18.27 12.38 9.03 13.63 VAPOUR PRESSURE (HPA) 11.80 9.40 13.90 17.15 22.24 25.78 28.54 30.16 35.26 28.75 19.75 14.53 21.44 SATURATION DEF. (HPA) 4.27 6.74 5.71 12.50 26.85 38.84 37.94 32.37 18.35 11.49 3.53 1.29 16.66 RELATIVE HUMIDITY (MEAN %) 77 63 74 62 51 43 47 52 68 75 87 93 66 RELATIVE HUMIDITY (MAX. %) 92 83 92 82 71 61 64 67 83 88 98 100 82 RELATIVE HUMIDITY (MIN. %) 58 42 55 41 34 27 32 38 53 60 72 80 49 RELATIVE HUMIDITY (MEAN% 03UTC) 89 80 88 80 67 57 62 67 78 86 95 99 79 RELATIVE HUMIDITY (MEAN% 09UTC) 63 47 60 47 38 31 37 43 58 62 76 85 54 RELATIVE HUMIDITY (MEAN% 15UTC) 73 55 66 51 38 34 37 43 65 73 83 93 59 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.3 0.2 86.6 34.4 8.5 0.0 0.0 0.0 0.0 11.0 87.4 90.1 340.5 DAYS WITH PRECIPITATION >=10 0 0 4 2 0 0 0 0 0 1 2 4 13 DAYS WITH PRECIPITATION >= 5 2 0 5 2 1 0 0 0 0 1 3 6 20 DAYS WITH PRECIPITATION >= 1 6 0 9 4 1 0 0 0 0 1 6 7 34 DAYS WITH PRECIPITATION 6 2 13 6 1 0 0 0 0 1 8 10 47 GREATEST DAILY PRECIPITATION 6.0 0.2 24.0 15.5 8.5 0.0 0.0 0.0 0.0 11.0 43.0 31.0 43.0 DAY 15 1 29 18 5 ** ** ** ** 23 12 20 DAY WITH THUNDER STORM 1 0 4 6 0 1 0 0 0 1 5 2 20 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 7 8 9 9 3 15 17 9 7 3 1 88 WIND DIRECTION (PREVAILING) 315 315 315 315 270 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.6 9.1 10.1 10.7 9.9 11.1 11.7 10.4 10.7 9.7 8.2 8.0 10.0 PREVAILING WIND PERCENT 25.4 43.3 20.6 26.7 16.1 34.2 35.9 38.7 36.3 19.8 11.7 23.0 27.3 CALMS PERCENT OF WIND 43.5 25.9 32.3 27.1 32.7 21.3 24.2 25.0 33.3 46.4 56.3 57.3 35.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 285 308 208 250 247 285 292 295 301 292 181 299 286 VECTOR WIND MAGNITUDE(KNOTS) 1.7 4.4 1.4 1.7 2.7 4.9 6.2 6.7 4.8 2.1 0.7 1.3 2.9 WIND STEADINESES (MEAN %) 35.4 61.1 18.7 21.8 40.9 57.0 76.5 87.0 72.7 42.9 16.7 33.3 44.6 WIND SPEED (MEAN KNOTS) 4.8 7.2 7.5 7.8 6.6 8.6 8.1 7.7 6.6 4.9 4.2 3.9 6.5 FASTEST WIND DIRECTION 150 180 270 190 260 320 310 300 320 340 170 240 180 FASTEST WIND SPEED (KNOTS) 23 45 43 39 45 37 37 35 33 35 31 29 45 DAY 16 21 25 9 18 2 15 19 5 20 11 20 DAYS WITH SKY CLEAR (0-2)/8 12 20 8 13 16 24 29 27 28 14 11 4 206 DAYS WITH P.CLOUDY (3-6)/8 13 7 17 12 11 5 2 4 2 14 11 15 113 DAYS WITH CLOUDY (7-8)/8 6 1 6 5 4 1 0 0 0 3 8 12 46 DAYS WITH VISIBILITY =< 2 KM 1 0 2 0 1 0 1 1 0 2 4 17 29 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.5 1016.3 1011.4 1008.6 1004.8 997.6 993.2 996.4 1003.4 1009.9 1013.5 1016.1 1007.2 MAX. QFE PRESSURE IN HPA 1020.7 1025.1 1021.7 1019.1 1011.2 1005.1 997.0 1001.8 1011.0 1015.3 1017.7 1022.5 1025.1 DAY-HOUR 19- 6 7- 6 1- 6 12- 6 6- 6 7-21 22- 6 31- 6 30- 6 31- 6 8- 6 30- 6 MIN. QFE PRESSURE IN HPA 1004.6 1006.8 1000.4 1002.3 997.7 989.1 989.4 990.3 996.8 1003.8 1010.2 1007.6 989.1 DAY-HOUR 16-15 21-15 25- 3 4-15 30-15 29-15 30-15 1-15 2-15 6-12 11-21 10-12 MEAN QNH PRESSURE IN HPA 1019.4 1020.2 1015.3 1012.5 1008.7 1001.4 997.1 1000.3 1007.2 1013.7 1017.4 1020.0 1011.1 MAX. QNH PRESSURE IN HPA 1024.6 1029.0 1025.6 1023.0 1015.1 1009.0 1000.8 1005.7 1014.9 1019.2 1021.6 1026.4 1029.0 DAY-HOUR 19- 6 7- 6 1- 6 12- 6 6- 6 7-21 22- 6 31- 6 30- 6 31- 6 8- 6 30- 6 MIN. QNH PRESSURE IN HPA 1008.5 1010.7 1004.3 1006.2 1001.5 992.9 993.2 994.1 1000.6 1007.7 1014.1 1011.5 992.9 DAY-HOUR 16-15 21-15 25- 3 4-15 30-15 29-15 30-15 1-15 2-15 6-12 11-21 10-12 MEAN QFF PRESSURE IN HPA 1019.7 1020.5 1015.5 1012.7 1008.7 1001.4 997.0 1000.2 1007.2 1013.8 1017.6 1020.3 1011.2 MAX. QFF PRESSURE IN HPA 1025.0 1029.5 1025.9 1023.3 1015.2 1009.0 1000.8 1005.6 1014.9 1019.3 1021.8 1026.7 1029.5 DAY-HOUR 19- 6 7- 6 1- 6 12- 6 6- 6 8- 0 22- 6 31- 6 30- 6 31- 6 8- 6 30- 6 MIN. QFF PRESSURE IN HPA 1008.7 1010.9 1004.4 1006.3 1001.5 992.8 993.2 994.1 1000.6 1007.6 1014.2 1011.7 992.8 DAY-HOUR 16-15 21-15 25- 3 4-15 30-15 29-15 30-15 1-15 2-15 6-12 11-21 10-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1016.2 1011.3 1008.5 1004.8 997.6 993.3 996.4 1003.1 1009.7 1013.3 1015.9 1007.1 MAX. QFE PRESSURE IN HPA 1018.6 1023.4 1021.1 1017.7 1009.3 1005.1 995.5 1000.2 1009.1 1013.7 1016.7 1021.2 1023.4 DAY 19 7 1 13 7 8 7 31 30 29 8 30 MIN. QFE PRESSURE IN HPA 1005.8 1008.9 1001.9 1002.8 999.1 990.1 990.7 992.0 998.5 1005.4 1010.8 1008.5 990.1 DAY 16 19 25 28 31 28 31 1 3 6 12 10 MEAN QNH PRESSURE IN HPA 1019.3 1020.1 1015.2 1012.3 1008.7 1001.5 997.2 1000.2 1007.0 1013.5 1017.2 1019.8 1011.0 MAX. QNH PRESSURE IN HPA 1022.5 1027.3 1025.0 1021.6 1013.2 1009.0 999.3 1004.1 1013.0 1017.6 1020.6 1025.1 1027.3 DAY 19 7 1 13 7 8 7 31 30 29 8 30 MIN. QNH PRESSURE IN HPA 1009.7 1012.8 1005.8 1006.7 1003.0 993.9 994.5 995.8 1002.3 1009.3 1014.7 1012.4 993.9 DAY 16 19 25 28 31 28 31 1 3 6 12 10 MEAN QFF PRESSURE IN HPA 1019.6 1020.4 1015.4 1012.5 1008.7 1001.4 997.1 1000.2 1007.0 1013.6 1017.4 1020.0 1011.1 MAX. QFF PRESSURE IN HPA 1022.8 1027.8 1025.3 1021.9 1013.3 1009.0 999.3 1004.0 1013.0 1017.7 1020.8 1025.4 1027.8 DAY 19 7 1 13 7 8 23 31 30 29 8 30 MIN. QFF PRESSURE IN HPA 1009.9 1013.0 1005.9 1006.7 1002.9 993.8 994.4 995.8 1002.3 1009.3 1014.8 1012.6 993.8 DAY 16 19 25 28 31 28 31 1 3 6 12 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1015.5 1016.4 1011.3 1008.9 1005.3 997.8 993.6 996.9 1003.5 1009.8 1013.4 1015.9 1007.4 MAX. QFE PRESSURE IN HPA 1019.0 1023.9 1020.5 1018.2 1010.3 1003.7 995.6 1000.6 1010.0 1013.5 1016.7 1021.3 1023.9 DAY 7 7 1 12 6 8 22 31 30 31 8 30 MIN. QFE PRESSURE IN HPA 1005.3 1008.8 1000.4 1004.0 999.0 990.2 991.0 991.5 999.3 1004.9 1010.9 1008.3 990.2 DAY 16 19 25 5 31 28 16 1 2 6 11 10 MEAN QNH PRESSURE IN HPA 1019.4 1020.3 1015.2 1012.8 1009.2 1001.7 997.4 1000.7 1007.4 1013.7 1017.3 1019.9 1011.2 MAX. QNH PRESSURE IN HPA 1022.9 1027.8 1024.4 1022.1 1014.2 1007.6 999.4 1004.5 1013.9 1017.4 1020.6 1025.2 1027.8 DAY 7 7 1 12 6 8 22 31 30 31 8 30 MIN. QNH PRESSURE IN HPA 1009.2 1012.7 1004.3 1007.9 1002.9 994.0 994.8 995.3 1003.2 1008.8 1014.8 1012.2 994.0 DAY 16 19 25 5 31 28 16 1 2 6 11 10 MEAN QFF PRESSURE IN HPA 1019.7 1020.6 1015.5 1013.0 1009.3 1001.6 997.4 1000.7 1007.4 1013.8 1017.6 1020.2 1011.4 MAX. QFF PRESSURE IN HPA 1023.3 1028.3 1024.8 1022.4 1014.4 1007.6 999.4 1004.5 1013.9 1017.5 1020.8 1025.5 1028.3 DAY 7 7 1 12 6 8 23 31 30 31 8 30 MIN. QFF PRESSURE IN HPA 1009.4 1012.9 1004.4 1008.0 1002.8 994.0 994.8 995.3 1003.2 1008.8 1014.9 1012.4 994.0 DAY 16 19 25 5 31 28 16 1 2 6 11 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.8 1017.7 1012.6 1010.1 1006.1 998.8 994.3 997.7 1004.6 1011.3 1014.8 1017.2 1008.5 MAX. QFE PRESSURE IN HPA 1020.7 1025.1 1021.7 1019.1 1011.2 1004.3 997.0 1001.8 1011.0 1015.3 1017.7 1022.5 1025.1 DAY 19 7 1 12 6 8 22 31 30 31 8 30 MIN. QFE PRESSURE IN HPA 1007.8 1010.6 1001.1 1005.6 999.8 992.1 991.3 991.8 1000.2 1006.8 1012.3 1009.8 991.3 DAY 16 19 29 4 31 28 16 1 2 6 11 10 MEAN QNH PRESSURE IN HPA 1020.7 1021.6 1016.5 1014.0 1010.0 1002.6 998.2 1001.6 1008.5 1015.2 1018.7 1021.1 1012.4 MAX. QNH PRESSURE IN HPA 1024.6 1029.0 1025.6 1023.0 1015.1 1008.2 1000.8 1005.7 1014.9 1019.2 1021.6 1026.4 1029.0 DAY 19 7 1 12 6 8 22 31 30 31 8 30 MIN. QNH PRESSURE IN HPA 1011.7 1014.5 1005.0 1009.5 1003.7 995.9 995.1 995.6 1004.1 1010.7 1016.2 1013.7 995.1 DAY 16 19 29 4 31 28 16 1 2 6 11 10 MEAN QFF PRESSURE IN HPA 1021.1 1021.9 1016.8 1014.2 1010.0 1002.6 998.1 1001.5 1008.5 1015.3 1018.9 1021.4 1012.5 MAX. QFF PRESSURE IN HPA 1025.0 1029.5 1025.9 1023.3 1015.2 1008.1 1000.8 1005.6 1014.9 1019.3 1021.8 1026.7 1029.5 DAY 19 7 1 12 6 8 22 31 30 31 8 30 MIN. QFF PRESSURE IN HPA 1011.9 1014.7 1005.2 1009.6 1003.6 995.8 995.1 995.6 1004.0 1010.7 1016.3 1013.9 995.1 DAY 16 19 29 4 31 28 16 1 2 6 11 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1016.2 1017.1 1012.2 1009.5 1005.5 998.2 994.0 997.1 1004.1 1010.5 1014.2 1016.5 1007.9 MAX. QFE PRESSURE IN HPA 1020.2 1024.6 1020.9 1018.4 1010.9 1004.7 996.4 1001.5 1009.6 1015.0 1017.3 1022.0 1024.6 DAY 19 6 1 12 6 4 19 31 30 31 4 22 MIN. QFE PRESSURE IN HPA 1007.5 1009.0 1003.1 1004.3 999.5 991.6 991.3 991.7 999.5 1005.4 1011.9 1008.8 991.3 DAY 17 21 25 28 31 29 11 1 2 6 24 10 MEAN QNH PRESSURE IN HPA 1020.1 1021.0 1016.1 1013.4 1009.4 1002.1 997.8 1000.9 1008.0 1014.4 1018.1 1020.4 1011.8 MAX. QNH PRESSURE IN HPA 1024.1 1028.5 1024.8 1022.3 1014.8 1008.6 1000.2 1005.4 1013.5 1018.9 1021.2 1025.9 1028.5 DAY 19 6 1 12 6 4 19 31 30 31 4 22 MIN. QNH PRESSURE IN HPA 1011.4 1012.9 1007.0 1008.2 1003.4 995.4 995.1 995.5 1003.4 1009.3 1015.8 1012.7 995.1 DAY 17 21 25 28 31 29 11 1 2 6 24 10 MEAN QFF PRESSURE IN HPA 1020.4 1021.3 1016.3 1013.5 1009.4 1002.0 997.7 1000.9 1008.0 1014.4 1018.2 1020.7 1011.9 MAX. QFF PRESSURE IN HPA 1024.4 1029.0 1025.1 1022.6 1014.9 1008.6 1000.2 1005.3 1013.5 1019.0 1021.4 1026.3 1029.0 DAY 19 7 1 12 6 4 19 31 30 31 4 22 MIN. QFF PRESSURE IN HPA 1011.6 1013.0 1007.2 1008.2 1003.3 995.3 995.0 995.4 1003.3 1009.2 1016.0 1012.9 995.0 DAY 17 21 25 28 31 29 16 1 2 6 24 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.5 1015.2 1010.6 1007.9 1003.9 996.9 992.5 995.4 1002.4 1009.0 1012.6 1015.3 1006.3 MAX. QFE PRESSURE IN HPA 1018.2 1023.3 1018.8 1016.9 1009.2 1003.5 994.9 1000.0 1007.0 1013.0 1015.7 1020.4 1023.3 DAY 19 6 1 12 6 4 25 31 30 31 29 22 MIN. QFE PRESSURE IN HPA 1005.5 1007.0 1002.3 1002.7 998.6 990.2 990.0 990.5 997.4 1003.8 1010.5 1007.6 990.0 DAY 16 21 24 4 31 29 16 1 2 6 24 10 MEAN QNH PRESSURE IN HPA 1018.4 1019.1 1014.5 1011.8 1007.8 1000.7 996.4 999.3 1006.2 1012.9 1016.5 1019.2 1010.2 MAX. QNH PRESSURE IN HPA 1022.1 1027.2 1022.7 1020.8 1013.1 1007.4 998.7 1003.9 1010.9 1016.9 1019.6 1024.3 1027.2 DAY 19 6 1 12 6 4 25 31 30 31 29 22 MIN. QNH PRESSURE IN HPA 1009.4 1010.9 1006.2 1006.6 1002.4 994.0 993.8 994.3 1001.2 1007.7 1014.4 1011.5 993.8 DAY 16 21 24 4 31 29 16 1 2 6 24 10 MEAN QFF PRESSURE IN HPA 1018.6 1019.4 1014.7 1011.9 1007.8 1000.7 996.3 999.2 1006.2 1012.9 1016.7 1019.5 1010.3 MAX. QFF PRESSURE IN HPA 1022.4 1027.6 1023.0 1021.1 1013.2 1007.4 998.7 1003.8 1010.9 1017.0 1019.8 1024.7 1027.6 DAY 19 6 1 12 6 4 25 31 30 31 29 22 MIN. QFF PRESSURE IN HPA 1009.6 1011.0 1006.3 1006.7 1002.4 993.9 993.7 994.2 1001.1 1007.6 1014.6 1011.7 993.7 DAY 16 21 24 4 31 29 16 1 2 6 24 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1014.7 1015.0 1010.3 1007.4 1003.5 996.3 991.9 995.0 1002.2 1008.9 1012.9 1015.9 1006.2 MAX. QFE PRESSURE IN HPA 1018.6 1022.4 1017.9 1016.1 1008.8 1003.0 994.4 999.6 1006.9 1013.3 1015.8 1020.9 1022.4 DAY 19 6 1 12 6 4 25 31 30 31 29 29 MIN. QFE PRESSURE IN HPA 1004.6 1006.8 1000.6 1002.3 997.7 989.1 989.4 990.3 996.8 1004.5 1010.4 1009.4 989.1 DAY 16 21 24 4 30 29 30 1 2 6 30 10 MEAN QNH PRESSURE IN HPA 1018.6 1018.9 1014.2 1011.3 1007.3 1000.2 995.7 998.9 1006.0 1012.8 1016.8 1019.8 1010.0 MAX. QNH PRESSURE IN HPA 1022.5 1026.3 1021.8 1020.0 1012.7 1006.9 998.2 1003.5 1010.8 1017.2 1019.7 1024.8 1026.3 DAY 19 6 1 12 6 4 25 31 30 31 29 29 MIN. QNH PRESSURE IN HPA 1008.5 1010.7 1004.5 1006.2 1001.5 992.9 993.2 994.1 1000.6 1008.4 1014.3 1013.3 992.9 DAY 16 21 24 4 30 29 30 1 2 6 30 10 MEAN QFF PRESSURE IN HPA 1018.9 1019.2 1014.5 1011.4 1007.4 1000.2 995.6 998.8 1006.0 1012.9 1017.0 1020.1 1010.2 MAX. QFF PRESSURE IN HPA 1022.9 1026.8 1022.1 1020.3 1012.8 1006.9 998.2 1003.4 1010.8 1017.3 1020.0 1025.1 1026.8 DAY 19 6 1 12 6 4 25 31 30 31 29 29 MIN. QFF PRESSURE IN HPA 1008.7 1010.9 1004.6 1006.3 1001.5 992.8 993.2 994.1 1000.6 1008.4 1014.6 1013.5 992.8 DAY 16 21 24 4 30 29 30 1 2 6 30 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1016.1 1011.3 1008.3 1004.4 997.3 992.9 996.3 1003.3 1009.8 1013.6 1016.4 1007.1 MAX. QFE PRESSURE IN HPA 1018.6 1023.4 1018.4 1016.8 1009.3 1003.9 995.2 1000.8 1009.1 1013.9 1016.9 1021.5 1023.4 DAY 19 6 1 12 6 4 25 31 29 31 7 29 MIN. QFE PRESSURE IN HPA 1005.8 1008.6 1001.8 1003.4 998.7 990.4 991.0 992.7 998.2 1005.9 1011.6 1008.9 990.4 DAY 16 22 24 4 30 28 15 1 2 6 24 9 MEAN QNH PRESSURE IN HPA 1019.4 1020.0 1015.2 1012.2 1008.3 1001.1 996.8 1000.2 1007.2 1013.7 1017.5 1020.3 1011.0 MAX. QNH PRESSURE IN HPA 1022.5 1027.3 1022.3 1020.7 1013.2 1007.8 999.0 1004.7 1013.0 1017.8 1020.8 1025.4 1027.3 DAY 19 6 1 12 6 4 25 31 29 31 7 29 MIN. QNH PRESSURE IN HPA 1009.7 1012.5 1005.7 1007.3 1002.6 994.2 994.8 996.5 1002.0 1009.8 1015.5 1012.8 994.2 DAY 16 22 24 4 30 28 15 1 2 6 24 9 MEAN QFF PRESSURE IN HPA 1019.7 1020.3 1015.5 1012.3 1008.3 1001.1 996.7 1000.1 1007.2 1013.8 1017.7 1020.6 1011.1 MAX. QFF PRESSURE IN HPA 1022.9 1027.8 1022.6 1021.0 1013.3 1007.8 999.0 1004.7 1013.0 1017.9 1021.0 1025.7 1027.8 DAY 19 6 1 12 6 4 25 31 29 31 7 29 MIN. QFF PRESSURE IN HPA 1009.9 1012.7 1005.8 1007.4 1002.5 994.1 994.8 996.5 1002.0 1009.8 1015.8 1013.0 994.1 DAY 16 22 24 4 30 28 15 1 2 6 24 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1015.6 1016.6 1011.6 1008.8 1004.9 997.8 993.6 996.8 1003.8 1010.1 1013.6 1016.2 1007.4 MAX. QFE PRESSURE IN HPA 1018.5 1023.7 1018.5 1017.4 1010.1 1005.1 995.6 1000.9 1009.5 1014.2 1017.3 1020.8 1023.7 DAY 18 6 9 12 6 7 6 31 29 31 7 29 MIN. QFE PRESSURE IN HPA 1008.0 1009.4 1002.8 1004.3 999.5 991.0 991.0 993.3 998.3 1005.8 1010.2 1009.2 991.0 DAY 15 22 24 27 30 28 30 1 2 5 11 9 MEAN QNH PRESSURE IN HPA 1019.5 1020.5 1015.5 1012.7 1008.8 1001.7 997.4 1000.7 1007.6 1014.0 1017.5 1020.1 1011.3 MAX. QNH PRESSURE IN HPA 1022.4 1027.6 1022.4 1021.3 1014.0 1009.0 999.4 1004.8 1013.4 1018.1 1021.2 1024.7 1027.6 DAY 18 6 9 12 6 7 6 31 29 31 7 29 MIN. QNH PRESSURE IN HPA 1011.9 1013.3 1006.7 1008.2 1003.4 994.8 994.8 997.1 1002.1 1009.7 1014.1 1013.1 994.8 DAY 15 22 24 27 30 28 30 1 2 5 11 9 MEAN QFF PRESSURE IN HPA 1019.8 1020.8 1015.7 1012.8 1008.8 1001.6 997.3 1000.6 1007.6 1014.0 1017.7 1020.4 1011.4 MAX. QFF PRESSURE IN HPA 1022.7 1028.1 1022.8 1021.6 1014.1 1008.9 999.4 1004.7 1013.4 1018.2 1021.4 1025.0 1028.1 DAY 18 6 9 12 6 7 6 31 29 31 7 29 MIN. QFF PRESSURE IN HPA 1012.1 1013.5 1006.8 1008.2 1003.3 994.7 994.8 997.1 1002.1 1009.7 1014.2 1013.3 994.7 DAY 15 22 24 27 30 28 30 1 2 5 11 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.0 14.4 18.1 25.2 32.4 37.8 38.5 39.0 34.5 27.2 21.0 16.7 26.3 MINIMUN AIR TEMPERATURE (C) 6.8 8.9 12.3 16.8 23.1 27.4 28.8 29.9 25.0 17.8 11.6 8.8 18.1 DAYS WITH MINIMUM TEMP. >=21 0 0 1 4 23 30 31 31 30 8 1 0 159 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) 0.0 2.0 7.0 12.0 18.0 23.5 24.5 25.0 21.0 13.0 8.0 3.0 0.0 DAY 11 17 4 1 2 1 9 23 8 23 28 13 MAXIMUM AIR TEMPERATURE (C) 15.8 20.5 23.9 33.1 40.5 47.0 47.4 47.9 43.9 37.4 31.0 26.4 34.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 24 31 30 31 31 30 30 23 2 234 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.0 26.5 32.0 38.5 47.5 51.0 50.0 51.0 47.0 43.5 35.5 31.0 51.0 DAY 31 7 28 13 28 28 20 15 1 2 4 17 DIF. BETWEEN (MAX.-MIN.) (C) 9.0 11.6 11.6 16.3 17.4 19.6 18.6 18.0 18.9 19.6 19.4 17.6 16.5 MEAN DAILY TEMP. (MDT) (C) 11.3 14.7 18.1 25.0 31.8 37.2 38.1 38.9 34.4 27.6 21.3 17.6 26.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.8 9.3 122.7 335.0 486.0 529.5 556.0 403.5 203.5 25.8 3.5 2675.5 HEATING DEG. DAYS(BASE 18 0C) 208.5 99.8 36.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 36.5 381.0 DEWPOINT (MEAN C) 9.1 10.7 13.5 16.2 17.3 21.5 22.9 28.6 21.9 18.2 13.5 11.1 17.0 MIXING RATIO (G/KG) 7.33 8.17 9.87 11.79 12.89 17.26 18.50 25.88 17.15 13.74 10.01 8.45 13.42 VAPOUR PRESSURE (HPA) 11.83 13.13 15.79 18.73 20.35 26.84 28.64 39.72 26.82 21.73 16.02 13.60 21.10 SATURATION DEF. (HPA) 1.72 4.01 5.85 15.29 31.19 42.85 43.11 33.82 30.98 17.11 10.66 6.77 20.28 RELATIVE HUMIDITY (MEAN %) 89 80 76 61 44 43 44 58 51 60 65 72 62 RELATIVE HUMIDITY (MAX. %) 99 96 94 85 65 62 66 77 71 78 83 89 80 RELATIVE HUMIDITY (MIN. %) 72 58 57 37 26 25 27 41 31 41 44 47 42 RELATIVE HUMIDITY (MEAN% 03UTC) 96 93 90 81 59 58 64 74 69 75 80 85 77 RELATIVE HUMIDITY (MEAN% 09UTC) 79 64 63 45 33 33 31 46 36 46 48 53 48 RELATIVE HUMIDITY (MEAN% 15UTC) 88 75 70 47 31 31 31 46 38 57 65 72 54 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 115.8 38.2 82.6 3.6 5.0 0.0 0.0 0.0 0.0 0.0 0.3 4.5 250.0 DAYS WITH PRECIPITATION >=10 1 1 2 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 5 3 4 0 0 0 0 0 0 0 0 0 12 DAYS WITH PRECIPITATION >= 1 8 7 11 1 2 0 0 0 0 0 0 1 30 DAYS WITH PRECIPITATION 10 9 11 3 2 0 0 0 0 0 1 4 40 GREATEST DAILY PRECIPITATION 85.0 14.3 33.0 3.0 4.0 0.0 0.0 0.0 0.0 0.0 0.3 3.0 85.0 DAY 5 15 30 20 14 ** ** ** ** ** 12 1 DAY WITH THUNDER STORM 2 2 3 2 4 1 0 0 0 1 1 2 18 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 4 3 3 5 8 6 9 9 4 3 3 1 58 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 180 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 9.2 10.2 9.0 10.0 9.7 12.5 11.1 9.3 10.0 9.2 7.3 7.0 9.6 PREVAILING WIND PERCENT 29.8 21.4 19.0 22.9 20.2 19.2 23.4 17.7 18.8 17.7 13.3 16.9 19.5 CALMS PERCENT OF WIND 34.3 47.3 32.7 44.6 47.6 50.8 38.3 36.7 52.5 58.1 62.1 66.9 47.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 289 288 232 278 291 283 276 221 278 285 230 281 273 VECTOR WIND MAGNITUDE(KNOTS) 1.6 1.6 1.4 2.0 3.0 3.7 4.1 3.0 2.5 2.2 0.6 1.3 2.1 WIND STEADINESES (MEAN %) 25.0 30.8 20.6 35.7 57.7 63.8 58.6 49.2 59.5 59.5 20.0 52.0 41.2 WIND SPEED (MEAN KNOTS) 6.4 5.2 6.8 5.6 5.2 5.8 7.0 6.1 4.2 3.7 3.0 2.5 5.1 FASTEST WIND DIRECTION 160 120 320 70 220 60 210 10 300 240 160 170 160 FASTEST WIND SPEED (KNOTS) 43 27 37 31 25 37 25 29 19 35 23 23 43 DAY 12 7 29 20 13 16 21 25 28 10 30 1 DAYS WITH SKY CLEAR (0-2)/8 9 8 8 16 18 27 26 25 27 27 20 14 225 DAYS WITH P.CLOUDY (3-6)/8 14 15 10 9 13 3 5 6 3 2 9 9 98 DAYS WITH CLOUDY (7-8)/8 8 5 13 5 0 0 0 0 0 2 1 8 42 DAYS WITH VISIBILITY =< 2 KM 9 0 2 0 0 0 0 3 0 0 0 0 14 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** 349.1 372.7 365.7 339.8 296.7 294.4 236.4 206.3 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.4 1014.3 1012.2 1007.9 1003.9 997.2 993.4 995.7 1000.9 1008.0 1013.1 1015.7 1006.6 MAX. QFE PRESSURE IN HPA 1023.1 1020.5 1019.0 1015.8 1010.7 1003.1 999.1 1001.7 1006.7 1015.4 1017.2 1021.7 1023.1 DAY-HOUR 14-21 5- 6 22- 6 12- 6 3- 6 1- 6 23- 6 25- 6 26- 6 25- 6 21- 6 6- 6 MIN. QFE PRESSURE IN HPA 1006.9 1006.5 1003.1 999.5 997.5 989.6 988.5 990.5 995.4 1002.2 1010.0 1009.5 988.5 DAY-HOUR 29-12 7-12 1- 3 22-18 29-15 30-15 2-15 13-15 2-15 1-12 18-12 21-12 MEAN QNH PRESSURE IN HPA 1020.3 1018.2 1016.0 1011.8 1007.7 1001.0 997.2 999.6 1004.8 1011.9 1017.0 1019.6 1010.4 MAX. QNH PRESSURE IN HPA 1027.0 1024.4 1022.9 1019.7 1014.6 1007.0 1003.0 1005.6 1010.6 1019.3 1021.1 1025.6 1027.0 DAY-HOUR 14-21 5- 6 22- 6 12- 6 3- 6 1- 6 23- 6 25- 6 26- 6 25- 6 21- 6 6- 6 MIN. QNH PRESSURE IN HPA 1010.8 1010.4 1007.0 1003.4 1001.3 993.4 992.3 994.3 999.2 1006.1 1013.9 1013.4 992.3 DAY-HOUR 29-12 7-12 1- 3 22-18 29-15 30-15 2-15 13-15 2-15 1-12 18-12 21-12 MEAN QFF PRESSURE IN HPA 1020.6 1018.5 1016.3 1011.9 1007.8 1001.0 997.2 999.5 1004.7 1012.0 1017.2 1019.9 1010.5 MAX. QFF PRESSURE IN HPA 1027.4 1024.7 1023.2 1019.8 1014.7 1006.9 1002.8 1005.5 1010.6 1019.4 1021.3 1025.9 1027.4 DAY-HOUR 14-21 5- 6 22- 6 7- 6 3- 6 1- 6 23- 6 25- 6 26- 6 25- 6 21- 6 6- 6 MIN. QFF PRESSURE IN HPA 1011.0 1010.5 1007.2 1003.4 1001.3 993.4 992.3 994.2 999.1 1006.1 1014.1 1013.6 992.3 DAY-HOUR 29-12 7-12 1- 3 22-21 29-15 30-15 2-15 13-15 2-15 1-12 18-12 21-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.3 1014.3 1011.8 1007.8 1003.9 997.5 993.4 995.7 1000.8 1007.7 1013.0 1015.7 1006.5 MAX. QFE PRESSURE IN HPA 1022.4 1018.4 1018.0 1014.6 1008.4 1002.2 997.6 1000.1 1004.8 1013.4 1015.6 1020.0 1022.4 DAY 15 3 22 1 3 5 23 26 26 26 27 6 MIN. QFE PRESSURE IN HPA 1009.5 1008.0 1004.7 1000.2 998.5 992.4 989.9 991.9 996.8 1002.8 1010.6 1011.2 989.9 DAY 13 8 1 21 29 30 3 13 1 1 11 21 MEAN QNH PRESSURE IN HPA 1020.2 1018.2 1015.7 1011.6 1007.7 1001.4 997.2 999.6 1004.6 1011.6 1016.9 1019.7 1010.4 MAX. QNH PRESSURE IN HPA 1026.3 1022.3 1021.9 1018.5 1012.3 1006.1 1001.4 1004.0 1008.7 1017.3 1019.5 1023.9 1026.3 DAY 15 3 22 1 3 5 23 26 26 26 27 6 MIN. QNH PRESSURE IN HPA 1013.4 1011.9 1008.6 1004.1 1002.3 996.2 993.7 995.7 1000.6 1006.7 1014.5 1015.1 993.7 DAY 13 8 1 21 29 30 3 13 1 1 11 21 MEAN QFF PRESSURE IN HPA 1020.5 1018.5 1015.9 1011.8 1007.8 1001.3 997.1 999.5 1004.6 1011.7 1017.1 1019.9 1010.5 MAX. QFF PRESSURE IN HPA 1026.7 1022.6 1022.2 1018.7 1012.4 1006.0 1001.3 1003.9 1008.6 1017.4 1019.7 1024.2 1026.7 DAY 15 3 22 1 3 5 23 26 26 26 27 6 MIN. QFF PRESSURE IN HPA 1013.7 1012.0 1008.8 1004.2 1002.3 996.2 993.7 995.6 1000.5 1006.7 1014.7 1015.3 993.7 DAY 13 8 1 21 29 30 3 13 1 1 11 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1014.4 1011.9 1007.9 1004.2 997.7 993.8 996.3 1001.1 1008.1 1013.3 1015.8 1006.7 MAX. QFE PRESSURE IN HPA 1021.2 1018.9 1017.7 1014.6 1009.1 1002.6 998.1 1000.8 1005.2 1013.7 1015.9 1019.8 1021.2 DAY 15 5 22 7 8 5 23 25 26 25 27 6 MIN. QFE PRESSURE IN HPA 1008.4 1007.4 1003.1 1000.6 998.7 992.2 990.6 992.5 997.7 1003.1 1012.0 1011.8 990.6 DAY 13 8 1 21 29 30 12 13 1 1 9 21 MEAN QNH PRESSURE IN HPA 1020.0 1018.3 1015.8 1011.8 1008.0 1001.5 997.6 1000.2 1004.9 1012.0 1017.2 1019.7 1010.6 MAX. QNH PRESSURE IN HPA 1025.1 1022.8 1021.6 1018.5 1013.0 1006.5 1001.9 1004.7 1009.1 1017.6 1019.8 1023.7 1025.1 DAY 15 5 22 7 8 5 23 25 26 25 27 6 MIN. QNH PRESSURE IN HPA 1012.3 1011.3 1007.0 1004.5 1002.6 996.0 994.4 996.3 1001.5 1007.0 1015.9 1015.7 994.4 DAY 13 8 1 21 29 30 12 13 1 1 9 21 MEAN QFF PRESSURE IN HPA 1020.4 1018.6 1016.0 1012.0 1008.1 1001.5 997.6 1000.1 1005.0 1012.1 1017.4 1019.9 1010.7 MAX. QFF PRESSURE IN HPA 1025.6 1023.1 1021.9 1018.7 1013.0 1006.4 1001.9 1004.6 1009.1 1017.8 1020.0 1024.0 1025.6 DAY 15 5 22 7 8 5 23 25 27 25 27 6 MIN. QFF PRESSURE IN HPA 1012.6 1011.5 1007.2 1004.6 1002.5 996.0 994.4 996.2 1001.5 1007.0 1016.1 1016.0 994.4 DAY 13 8 1 21 29 30 12 13 2 1 9 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.4 1015.7 1013.1 1009.3 1005.2 998.3 994.5 997.2 1002.3 1009.5 1014.6 1017.2 1007.9 MAX. QFE PRESSURE IN HPA 1022.5 1020.5 1019.0 1015.8 1010.7 1003.1 999.1 1001.7 1006.7 1015.4 1017.2 1021.7 1022.5 DAY 15 5 22 12 3 1 23 25 26 25 21 6 MIN. QFE PRESSURE IN HPA 1009.4 1009.9 1003.4 1001.4 1000.1 992.5 991.1 992.9 998.9 1004.5 1012.9 1012.6 991.1 DAY 29 8 18 21 30 30 12 13 1 1 10 21 MEAN QNH PRESSURE IN HPA 1021.3 1019.6 1017.0 1013.2 1009.1 1002.2 998.4 1001.0 1006.2 1013.4 1018.5 1021.1 1011.7 MAX. QNH PRESSURE IN HPA 1026.4 1024.4 1022.9 1019.7 1014.6 1007.0 1003.0 1005.6 1010.6 1019.3 1021.1 1025.6 1026.4 DAY 15 5 22 12 3 1 23 25 26 25 21 6 MIN. QNH PRESSURE IN HPA 1013.3 1013.8 1007.3 1005.3 1004.0 996.3 994.9 996.7 1002.8 1008.4 1016.8 1016.5 994.9 DAY 29 8 18 21 30 30 12 13 1 1 10 21 MEAN QFF PRESSURE IN HPA 1021.7 1019.9 1017.2 1013.3 1009.1 1002.1 998.3 1000.9 1006.2 1013.5 1018.7 1021.4 1011.9 MAX. QFF PRESSURE IN HPA 1026.9 1024.7 1023.2 1019.8 1014.7 1006.9 1002.8 1005.5 1010.6 1019.4 1021.3 1025.9 1026.9 DAY 15 5 22 7 3 1 23 25 26 25 21 6 MIN. QFF PRESSURE IN HPA 1013.6 1014.0 1007.4 1005.3 1003.9 996.3 994.9 996.6 1002.7 1008.4 1016.9 1016.8 994.9 DAY 29 8 18 21 30 30 12 13 1 1 10 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1016.9 1015.1 1012.9 1008.9 1004.6 997.7 994.0 996.4 1001.7 1008.6 1013.5 1016.2 1007.2 MAX. QFE PRESSURE IN HPA 1022.7 1019.5 1018.6 1015.3 1010.4 1002.6 998.2 1001.1 1005.4 1014.6 1016.5 1020.4 1022.7 DAY 22 5 22 7 3 1 22 25 25 25 21 6 MIN. QFE PRESSURE IN HPA 1008.4 1008.4 1004.3 1001.6 999.9 991.5 990.5 992.8 997.8 1004.0 1011.8 1010.4 990.5 DAY 29 7 18 21 30 30 12 13 2 1 10 21 MEAN QNH PRESSURE IN HPA 1020.8 1019.0 1016.8 1012.8 1008.5 1001.5 997.8 1000.3 1005.5 1012.5 1017.4 1020.1 1011.1 MAX. QNH PRESSURE IN HPA 1026.6 1023.4 1022.5 1019.2 1014.3 1006.5 1002.0 1005.0 1009.3 1018.5 1020.4 1024.3 1026.6 DAY 22 5 22 7 3 1 22 25 25 25 21 6 MIN. QNH PRESSURE IN HPA 1012.3 1012.3 1008.2 1005.5 1003.8 995.3 994.3 996.6 1001.6 1007.9 1015.7 1014.3 994.3 DAY 29 7 18 21 30 30 12 13 2 1 10 21 MEAN QFF PRESSURE IN HPA 1021.1 1019.3 1017.0 1012.9 1008.5 1001.4 997.8 1000.2 1005.5 1012.6 1017.6 1020.3 1011.2 MAX. QFF PRESSURE IN HPA 1027.0 1023.6 1022.8 1019.4 1014.3 1006.4 1001.9 1004.9 1009.2 1018.6 1020.6 1024.6 1027.0 DAY 22 5 22 7 3 1 22 25 25 25 21 6 MIN. QFF PRESSURE IN HPA 1012.6 1012.4 1008.3 1005.5 1003.7 995.3 994.3 996.5 1001.5 1007.9 1015.8 1014.5 994.3 DAY 29 7 18 21 30 30 12 13 2 1 10 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.5 1013.3 1011.4 1007.3 1003.1 996.2 992.6 994.7 999.9 1007.0 1012.0 1014.6 1005.6 MAX. QFE PRESSURE IN HPA 1021.4 1017.8 1017.1 1013.4 1008.6 1001.0 995.9 999.1 1003.6 1013.0 1015.2 1019.3 1021.4 DAY 14 24 21 2 3 1 22 25 26 25 21 6 MIN. QFE PRESSURE IN HPA 1006.9 1006.5 1003.4 1000.7 998.9 989.9 989.0 990.9 996.0 1002.2 1010.0 1009.5 989.0 DAY 29 7 1 21 29 30 2 13 1 1 18 21 MEAN QNH PRESSURE IN HPA 1019.4 1017.2 1015.3 1011.1 1007.0 1000.1 996.4 998.6 1003.8 1010.9 1015.9 1018.5 1009.5 MAX. QNH PRESSURE IN HPA 1025.3 1021.7 1021.0 1017.3 1012.5 1004.9 999.7 1003.0 1007.5 1016.9 1019.1 1023.2 1025.3 DAY 14 24 21 2 3 1 22 25 26 25 21 6 MIN. QNH PRESSURE IN HPA 1010.8 1010.4 1007.3 1004.6 1002.8 993.7 992.8 994.7 999.8 1006.1 1013.9 1013.4 992.8 DAY 29 7 1 21 29 30 2 13 1 1 18 21 MEAN QFF PRESSURE IN HPA 1019.7 1017.5 1015.5 1011.3 1007.0 1000.0 996.3 998.5 1003.7 1010.9 1016.1 1018.8 1009.6 MAX. QFF PRESSURE IN HPA 1025.7 1022.0 1021.3 1017.5 1012.6 1004.9 999.6 1002.9 1007.4 1017.0 1019.3 1023.5 1025.7 DAY 14 24 21 2 3 1 22 25 26 25 21 6 MIN. QFF PRESSURE IN HPA 1011.0 1010.5 1007.5 1004.6 1002.7 993.7 992.8 994.6 999.8 1006.1 1014.1 1013.6 992.8 DAY 29 7 1 21 29 30 2 13 1 1 18 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.9 1013.4 1011.3 1006.8 1002.5 995.7 992.1 994.2 999.7 1007.1 1012.3 1015.0 1005.5 MAX. QFE PRESSURE IN HPA 1021.9 1018.0 1017.1 1013.0 1007.3 1000.4 995.1 998.5 1004.0 1013.0 1015.4 1019.5 1021.9 DAY 14 2 21 6 3 5 21 25 26 25 21 6 MIN. QFE PRESSURE IN HPA 1008.1 1006.9 1004.1 1000.3 997.5 989.6 988.5 990.5 995.4 1002.2 1010.1 1010.6 988.5 DAY 29 7 1 22 29 30 2 13 2 1 9 21 MEAN QNH PRESSURE IN HPA 1019.8 1017.3 1015.2 1010.6 1006.4 999.6 995.9 998.1 1003.6 1010.9 1016.2 1018.9 1009.4 MAX. QNH PRESSURE IN HPA 1025.8 1021.9 1021.0 1016.9 1011.2 1004.3 998.9 1002.3 1007.9 1016.9 1019.3 1023.4 1025.8 DAY 14 2 21 6 3 5 21 25 26 25 21 6 MIN. QNH PRESSURE IN HPA 1012.0 1010.8 1008.0 1004.2 1001.3 993.4 992.3 994.3 999.2 1006.1 1014.0 1014.5 992.3 DAY 29 7 1 22 29 30 2 13 2 1 9 21 MEAN QFF PRESSURE IN HPA 1020.2 1017.6 1015.5 1010.8 1006.4 999.5 995.8 998.0 1003.6 1011.1 1016.4 1019.2 1009.5 MAX. QFF PRESSURE IN HPA 1026.3 1022.2 1021.3 1017.1 1011.3 1004.2 998.9 1002.3 1007.9 1017.1 1019.5 1023.7 1026.3 DAY 14 2 21 6 3 5 21 25 26 25 21 6 MIN. QFF PRESSURE IN HPA 1012.2 1011.0 1008.2 1004.2 1001.3 993.4 992.3 994.2 999.1 1006.1 1014.2 1014.8 992.3 DAY 29 7 1 22 29 30 2 13 2 1 9 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1016.6 1014.1 1012.3 1007.5 1003.5 996.8 993.3 995.5 1000.8 1008.0 1013.1 1015.7 1006.4 MAX. QFE PRESSURE IN HPA 1022.9 1018.8 1018.2 1014.0 1008.4 1001.4 997.0 999.9 1005.3 1013.6 1015.5 1020.3 1022.9 DAY 14 2 21 6 3 5 21 25 26 25 20 6 MIN. QFE PRESSURE IN HPA 1010.2 1007.6 1006.2 999.5 998.4 990.1 989.5 991.7 996.2 1003.1 1011.2 1011.8 989.5 DAY 29 7 1 22 29 30 1 12 2 1 10 21 MEAN QNH PRESSURE IN HPA 1020.5 1018.0 1016.2 1011.4 1007.4 1000.7 997.1 999.3 1004.6 1011.9 1016.9 1019.6 1010.3 MAX. QNH PRESSURE IN HPA 1026.8 1022.7 1022.1 1017.9 1012.3 1005.3 1000.8 1003.8 1009.2 1017.5 1019.4 1024.2 1026.8 DAY 14 2 21 6 3 5 21 25 26 25 20 6 MIN. QNH PRESSURE IN HPA 1014.1 1011.5 1010.1 1003.4 1002.2 993.9 993.3 995.5 1000.0 1007.0 1015.1 1015.7 993.3 DAY 29 7 1 22 29 30 1 12 2 1 10 21 MEAN QFF PRESSURE IN HPA 1020.8 1018.3 1016.5 1011.5 1007.4 1000.6 997.1 999.2 1004.6 1012.0 1017.1 1019.9 1010.4 MAX. QFF PRESSURE IN HPA 1027.3 1023.0 1022.4 1018.1 1012.4 1005.2 1000.7 1003.7 1009.2 1017.6 1019.6 1024.6 1027.3 DAY 14 2 21 6 3 5 21 25 26 25 20 6 MIN. QFF PRESSURE IN HPA 1014.4 1011.7 1010.3 1003.4 1002.2 993.9 993.3 995.4 1000.0 1007.0 1015.2 1016.0 993.3 DAY 29 7 1 22 29 30 1 12 2 1 10 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1014.2 1012.6 1007.8 1004.1 997.5 993.9 996.0 1001.2 1008.1 1013.1 1015.8 1006.8 MAX. QFE PRESSURE IN HPA 1023.1 1019.1 1018.7 1014.4 1009.5 1001.9 997.8 1001.1 1005.1 1014.0 1015.7 1019.8 1023.1 DAY 14 23 21 6 2 4 21 25 26 25 21 6 MIN. QFE PRESSURE IN HPA 1011.2 1007.0 1006.6 999.5 998.3 990.8 990.0 992.0 997.1 1003.4 1010.6 1011.5 990.0 DAY 29 28 28 22 29 30 2 13 2 1 10 20 MEAN QNH PRESSURE IN HPA 1020.6 1018.1 1016.5 1011.7 1008.0 1001.3 997.7 999.8 1005.1 1012.0 1017.0 1019.7 1010.6 MAX. QNH PRESSURE IN HPA 1027.0 1023.0 1022.6 1018.3 1013.4 1005.8 1001.6 1005.0 1009.0 1017.9 1019.6 1023.7 1027.0 DAY 14 23 21 6 2 4 21 25 26 25 21 6 MIN. QNH PRESSURE IN HPA 1015.1 1010.9 1010.5 1003.4 1002.1 994.6 993.8 995.8 1000.9 1007.3 1014.5 1015.4 993.8 DAY 29 28 28 22 29 30 2 13 2 1 10 20 MEAN QFF PRESSURE IN HPA 1020.9 1018.4 1016.7 1011.8 1008.0 1001.2 997.6 999.7 1005.0 1012.1 1017.2 1019.9 1010.7 MAX. QFF PRESSURE IN HPA 1027.4 1023.3 1022.9 1018.5 1013.4 1005.7 1001.5 1004.9 1008.9 1018.0 1019.8 1024.0 1027.4 DAY 14 23 21 6 2 4 21 25 26 25 21 6 MIN. QFF PRESSURE IN HPA 1015.4 1011.1 1010.6 1003.4 1002.1 994.5 993.7 995.7 1000.9 1007.3 1014.6 1015.6 993.7 DAY 29 28 28 22 29 30 2 13 2 1 10 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.6 15.3 17.7 26.2 32.9 37.4 37.8 38.7 33.1 28.6 19.1 13.6 26.2 MINIMUN AIR TEMPERATURE (C) 9.0 10.1 11.3 17.9 22.2 26.4 28.5 29.6 22.9 19.7 11.6 7.1 18.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 7 22 30 31 31 23 14 2 0 160 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) 4.0 2.5 7.0 12.0 17.0 23.0 26.0 28.0 17.0 13.5 1.0 1.0 1.0 DAY 3 22 18 9 2 8 1 1 24 22 30 1 MAXIMUM AIR TEMPERATURE (C) 18.8 21.0 24.2 34.3 42.3 47.0 46.7 48.0 43.4 38.2 27.5 21.2 34.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 29 31 30 31 31 30 30 8 0 221 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.5 25.0 33.0 40.5 48.0 50.0 49.5 51.0 49.0 43.0 34.5 26.0 51.0 DAY 6 19 31 26 28 12 19 26 1 2 7 7 DIF. BETWEEN (MAX.-MIN.) (C) 9.8 10.9 12.9 16.4 20.1 20.6 18.2 18.4 20.5 18.5 15.9 14.1 16.4 MEAN DAILY TEMP. (MDT) (C) 13.9 15.6 17.8 26.1 32.2 36.7 37.6 38.8 33.1 28.9 19.6 14.1 26.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 3.5 154.5 348.5 471.0 513.5 551.4 364.3 246.4 28.4 0.0 2681.6 HEATING DEG. DAYS(BASE 18 0C) 127.2 71.3 29.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19.0 119.5 365.8 DEWPOINT (MEAN C) 11.2 12.6 12.8 20.3 21.0 27.0 25.3 25.3 20.6 18.6 12.0 10.9 18.1 MIXING RATIO (G/KG) 8.38 9.21 9.35 15.76 16.52 23.96 21.61 21.40 16.26 14.26 9.01 8.27 14.50 VAPOUR PRESSURE (HPA) 13.48 14.78 14.94 24.82 25.85 36.87 33.25 33.03 25.40 22.52 14.45 13.33 22.73 SATURATION DEF. (HPA) 2.46 3.16 6.18 11.46 28.00 31.30 35.61 39.39 29.02 19.18 9.33 2.99 18.17 RELATIVE HUMIDITY (MEAN %) 87 85 75 71 52 57 51 50 51 57 66 85 66 RELATIVE HUMIDITY (MAX. %) 98 98 93 85 69 73 69 69 75 75 86 98 82 RELATIVE HUMIDITY (MIN. %) 70 66 53 58 36 43 36 32 31 41 44 65 48 RELATIVE HUMIDITY (MEAN% 03UTC) 93 96 90 81 66 67 64 65 71 72 82 97 79 RELATIVE HUMIDITY (MEAN% 09UTC) 78 72 60 62 40 47 41 36 36 45 49 73 53 RELATIVE HUMIDITY (MEAN% 15UTC) 83 80 67 65 44 50 44 39 41 51 63 81 59 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 192.8 104.6 46.8 0.6 0.0 0.0 0.0 0.0 0.0 0.6 11.8 43.3 400.5 DAYS WITH PRECIPITATION >=10 6 3 2 0 0 0 0 0 0 0 0 1 12 DAYS WITH PRECIPITATION >= 5 8 4 4 0 0 0 0 0 0 0 1 2 19 DAYS WITH PRECIPITATION >= 1 10 11 5 0 0 0 0 0 0 0 3 3 32 DAYS WITH PRECIPITATION 10 11 5 1 0 0 0 0 0 1 4 5 37 GREATEST DAILY PRECIPITATION 78.0 54.0 15.2 0.6 0.0 0.0 0.0 0.0 0.0 0.6 9.0 34.3 78.0 DAY 17 5 2 6 ** ** ** ** ** 27 15 11 DAY WITH THUNDER STORM 5 3 2 2 0 0 0 0 0 0 3 0 15 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 5 6 7 9 7 16 3 7 3 8 2 75 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 270 225 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.1 9.3 10.2 10.1 10.9 11.5 10.5 8.5 9.8 9.8 10.2 8.4 10.0 PREVAILING WIND PERCENT 23.4 18.3 19.4 22.9 37.1 25.8 21.4 13.7 20.8 23.4 29.2 19.4 21.8 CALMS PERCENT OF WIND 44.4 56.3 45.6 47.9 36.3 40.4 38.3 46.0 47.5 44.4 40.8 67.3 46.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 295 267 201 310 296 294 256 222 278 297 289 302 283 VECTOR WIND MAGNITUDE(KNOTS) 0.9 0.3 0.9 3.3 4.9 4.1 3.1 2.6 2.6 2.5 2.7 1.8 2.2 WIND STEADINESES (MEAN %) 19.1 7.0 15.0 63.5 73.1 68.3 47.0 57.8 55.3 50.0 46.6 64.3 42.3 WIND SPEED (MEAN KNOTS) 4.7 4.3 6.0 5.2 6.7 6.0 6.6 4.5 4.7 5.0 5.8 2.8 5.2 FASTEST WIND DIRECTION 180 130 140 20 300 300 280 230 320 270 340 290 140 FASTEST WIND SPEED (KNOTS) 31 25 33 33 29 25 29 23 33 23 29 23 33 DAY 24 19 20 22 3 13 10 13 2 27 15 2 DAYS WITH SKY CLEAR (0-2)/8 10 12 15 13 24 29 29 25 30 27 12 16 242 DAYS WITH P.CLOUDY (3-6)/8 8 4 7 9 6 1 2 6 0 2 12 8 65 DAYS WITH CLOUDY (7-8)/8 13 12 9 8 1 0 0 0 0 2 6 7 58 DAYS WITH VISIBILITY =< 2 KM 12 1 1 0 4 1 2 0 0 2 1 14 38 DURATION OF SUNSHINE HOURS 147.3 168.5 229.9 241.0 307.7 352.4 290.3 319.3 302.1 250.5 208.4 177.0 2994.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1014.8 1014.0 1009.8 1007.5 1002.0 997.0 993.0 995.3 1000.5 1007.5 1013.5 1017.4 1006.0 MAX. QFE PRESSURE IN HPA 1020.7 1019.8 1016.9 1014.2 1010.4 1003.2 998.7 1002.0 1009.0 1013.4 1021.1 1022.9 1022.9 DAY-HOUR 22- 6 22- 6 18- 6 11- 6 1- 9 1-21 8- 6 18-21 30- 6 27- 9 29- 6 3- 6 MIN. QFE PRESSURE IN HPA 1005.8 1005.2 1000.8 1000.1 997.5 989.9 986.8 989.6 994.6 1001.1 1004.8 1012.1 986.8 DAY-HOUR 18- 3 5-15 2- 3 7-15 19-15 24-15 12-15 13-15 10-15 8-15 1- 3 31-12 MEAN QNH PRESSURE IN HPA 1018.7 1017.8 1013.7 1011.4 1005.8 1000.9 996.8 999.2 1004.3 1011.4 1017.4 1021.3 1009.9 MAX. QNH PRESSURE IN HPA 1024.6 1023.7 1020.8 1018.1 1014.3 1007.1 1002.6 1005.9 1012.9 1017.3 1025.0 1026.8 1026.8 DAY-HOUR 22- 6 22- 6 18- 6 11- 6 1- 9 1-21 8- 6 18-21 30- 6 27- 9 29- 6 3- 6 MIN. QNH PRESSURE IN HPA 1009.7 1009.1 1004.7 1004.0 1001.3 993.7 990.6 993.4 998.4 1005.0 1008.7 1016.0 990.6 DAY-HOUR 18- 3 5-15 2- 3 7-15 19-15 24-15 12-15 13-15 10-15 8-15 1- 3 31-12 MEAN QFF PRESSURE IN HPA 1018.9 1018.1 1013.9 1011.5 1005.9 1000.8 996.8 999.1 1004.3 1011.5 1017.6 1021.6 1010.0 MAX. QFF PRESSURE IN HPA 1025.0 1024.1 1021.1 1018.3 1014.3 1007.0 1002.5 1005.8 1012.9 1017.4 1025.4 1027.2 1027.2 DAY-HOUR 22- 6 22- 6 18- 6 11- 6 1- 9 2- 6 8- 6 18-21 30- 6 27- 9 29- 6 3- 6 MIN. QFF PRESSURE IN HPA 1010.0 1009.4 1004.9 1004.0 1001.3 993.7 990.5 993.4 998.4 1005.0 1008.7 1016.3 990.5 DAY-HOUR 18- 3 5-15 2- 3 7-15 19-15 24-15 12-15 13-15 10-15 8-15 1- 3 31-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1014.6 1013.9 1009.5 1007.3 1002.1 997.2 993.0 995.4 1000.2 1007.4 1013.4 1017.4 1005.9 MAX. QFE PRESSURE IN HPA 1019.6 1018.8 1015.5 1013.8 1008.1 1003.0 998.6 1001.5 1006.0 1010.7 1018.4 1020.0 1020.0 DAY 11 22 18 11 2 2 1 19 30 28 29 3 MIN. QFE PRESSURE IN HPA 1006.3 1005.7 1002.4 1001.4 997.9 991.4 987.8 990.7 996.5 1002.9 1005.1 1013.3 987.8 DAY 18 6 2 8 20 25 13 14 7 9 1 15 MEAN QNH PRESSURE IN HPA 1018.5 1017.8 1013.4 1011.2 1005.9 1001.0 996.8 999.2 1004.1 1011.3 1017.3 1021.3 1009.8 MAX. QNH PRESSURE IN HPA 1023.5 1022.7 1019.4 1017.7 1012.0 1006.9 1002.4 1005.4 1009.9 1014.6 1022.3 1023.9 1023.9 DAY 11 22 18 11 2 2 1 19 30 28 29 3 MIN. QNH PRESSURE IN HPA 1010.2 1009.6 1006.3 1005.3 1001.7 995.2 991.6 994.5 1000.3 1006.8 1009.0 1017.2 991.6 DAY 18 6 2 8 20 25 13 14 7 9 1 15 MEAN QFF PRESSURE IN HPA 1018.8 1018.0 1013.6 1011.3 1005.9 1000.9 996.8 999.1 1004.1 1011.3 1017.5 1021.6 1009.9 MAX. QFF PRESSURE IN HPA 1023.8 1023.1 1019.7 1017.9 1012.0 1006.8 1002.4 1005.3 1009.9 1014.7 1022.6 1024.3 1024.3 DAY 22 22 18 11 2 2 1 19 30 28 29 5 MIN. QFF PRESSURE IN HPA 1010.5 1009.9 1006.5 1005.3 1001.7 995.2 991.5 994.4 1000.3 1006.8 1009.0 1017.4 991.5 DAY 18 6 2 8 20 25 13 14 7 9 1 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1014.5 1013.9 1009.5 1007.6 1002.3 997.5 993.4 995.8 1000.7 1007.7 1013.3 1017.3 1006.1 MAX. QFE PRESSURE IN HPA 1019.6 1019.4 1015.6 1013.1 1008.4 1002.8 997.8 1001.0 1007.2 1011.2 1019.9 1020.7 1020.7 DAY 22 22 18 11 1 2 1 19 30 28 29 3 MIN. QFE PRESSURE IN HPA 1005.8 1006.0 1000.8 1002.9 998.2 991.7 988.7 991.2 996.9 1003.2 1004.8 1013.0 988.7 DAY 18 6 2 27 20 24 12 7 7 9 1 27 MEAN QNH PRESSURE IN HPA 1018.4 1017.8 1013.4 1011.5 1006.2 1001.3 997.2 999.6 1004.5 1011.6 1017.2 1021.2 1010.0 MAX. QNH PRESSURE IN HPA 1023.5 1023.3 1019.5 1017.0 1012.3 1006.7 1001.6 1004.9 1011.1 1015.1 1023.8 1024.6 1024.6 DAY 22 22 18 11 1 2 1 19 30 28 29 3 MIN. QNH PRESSURE IN HPA 1009.7 1009.9 1004.7 1006.8 1002.0 995.5 992.5 995.0 1000.7 1007.1 1008.7 1016.9 992.5 DAY 18 6 2 27 20 24 12 7 7 9 1 27 MEAN QFF PRESSURE IN HPA 1018.7 1018.1 1013.6 1011.6 1006.2 1001.3 997.2 999.6 1004.5 1011.7 1017.5 1021.5 1010.1 MAX. QFF PRESSURE IN HPA 1023.9 1023.7 1019.8 1017.2 1012.4 1006.6 1001.6 1004.8 1011.1 1015.3 1024.1 1025.0 1025.0 DAY 22 22 18 11 1 2 1 24 30 28 29 3 MIN. QFF PRESSURE IN HPA 1010.0 1010.2 1004.9 1006.8 1002.0 995.5 992.5 994.9 1000.8 1007.1 1008.7 1017.2 992.5 DAY 18 6 2 27 20 24 12 7 7 9 1 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.8 1015.2 1011.0 1008.9 1003.3 998.2 994.2 996.7 1001.8 1009.2 1014.9 1018.8 1007.3 MAX. QFE PRESSURE IN HPA 1020.7 1019.8 1016.9 1014.2 1010.2 1003.2 998.7 1001.8 1009.0 1012.9 1021.1 1022.9 1022.9 DAY 22 22 18 11 1 2 8 19 30 23 29 3 MIN. QFE PRESSURE IN HPA 1008.5 1008.0 1002.7 1004.0 998.8 992.3 989.3 991.7 997.9 1004.7 1008.2 1014.4 989.3 DAY 18 20 2 27 20 24 12 7 7 8 11 31 MEAN QNH PRESSURE IN HPA 1019.7 1019.1 1014.9 1012.8 1007.2 1002.0 998.0 1000.6 1005.6 1013.1 1018.9 1022.7 1011.2 MAX. QNH PRESSURE IN HPA 1024.6 1023.7 1020.8 1018.1 1014.1 1007.1 1002.6 1005.7 1012.9 1016.8 1025.0 1026.8 1026.8 DAY 22 22 18 11 1 2 8 19 30 23 29 3 MIN. QNH PRESSURE IN HPA 1012.4 1011.9 1006.6 1007.9 1002.7 996.1 993.1 995.5 1001.7 1008.6 1012.1 1018.3 993.1 DAY 18 20 2 27 20 24 12 7 7 8 11 31 MEAN QFF PRESSURE IN HPA 1020.0 1019.4 1015.2 1012.9 1007.2 1001.9 997.9 1000.5 1005.6 1013.1 1019.1 1023.0 1011.3 MAX. QFF PRESSURE IN HPA 1025.0 1024.1 1021.1 1018.3 1014.1 1007.0 1002.5 1005.6 1012.9 1016.9 1025.4 1027.2 1027.2 DAY 22 22 18 11 1 2 8 19 30 23 29 3 MIN. QFF PRESSURE IN HPA 1012.7 1012.1 1006.8 1007.9 1002.6 996.1 993.1 995.4 1001.7 1008.6 1012.2 1018.6 993.1 DAY 18 20 2 27 20 24 12 7 7 8 11 31 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1015.5 1014.7 1010.7 1008.5 1002.7 997.7 993.8 996.1 1001.1 1008.3 1014.1 1017.8 1006.8 MAX. QFE PRESSURE IN HPA 1020.3 1019.6 1016.7 1013.8 1010.4 1002.6 998.5 1001.5 1008.5 1013.4 1020.6 1021.9 1021.9 DAY 22 22 18 11 1 2 8 19 30 27 15 3 MIN. QFE PRESSURE IN HPA 1008.5 1009.0 1002.5 1004.0 999.1 992.2 988.5 991.7 997.0 1003.7 1007.8 1013.6 988.5 DAY 18 20 2 7 20 24 12 7 10 8 11 31 MEAN QNH PRESSURE IN HPA 1019.4 1018.6 1014.6 1012.4 1006.6 1001.5 997.6 999.9 1005.0 1012.2 1018.0 1021.8 1010.6 MAX. QNH PRESSURE IN HPA 1024.2 1023.5 1020.6 1017.7 1014.3 1006.5 1002.3 1005.4 1012.4 1017.3 1024.5 1025.8 1025.8 DAY 22 22 18 11 1 2 8 19 30 27 15 3 MIN. QNH PRESSURE IN HPA 1012.4 1012.9 1006.4 1007.9 1003.0 996.0 992.3 995.5 1000.8 1007.6 1011.7 1017.5 992.3 DAY 18 20 2 7 20 24 12 7 10 8 11 31 MEAN QFF PRESSURE IN HPA 1019.6 1018.9 1014.8 1012.5 1006.5 1001.4 997.5 999.8 1005.0 1012.2 1018.2 1022.0 1010.7 MAX. QFF PRESSURE IN HPA 1024.6 1023.9 1020.9 1017.8 1014.3 1006.4 1002.3 1005.3 1012.4 1017.4 1024.8 1026.1 1026.1 DAY 22 22 18 11 1 2 8 19 30 27 15 3 MIN. QFF PRESSURE IN HPA 1012.7 1013.1 1006.6 1007.9 1002.9 996.0 992.2 995.4 1000.8 1007.6 1011.8 1017.8 992.2 DAY 18 20 2 7 20 24 12 7 10 8 11 31 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1013.8 1013.1 1009.2 1007.0 1001.1 996.3 992.3 994.3 999.5 1006.6 1012.4 1016.4 1005.2 MAX. QFE PRESSURE IN HPA 1018.8 1017.7 1015.4 1011.7 1008.2 1001.3 996.8 999.3 1006.4 1011.1 1018.0 1020.4 1020.4 DAY 10 22 18 10 1 1 8 18 30 27 29 3 MIN. QFE PRESSURE IN HPA 1007.6 1007.1 1001.5 1001.1 997.8 990.6 987.0 990.4 994.9 1001.2 1006.5 1012.1 987.0 DAY 18 5 2 7 19 24 12 13 10 8 1 31 MEAN QNH PRESSURE IN HPA 1017.7 1017.0 1013.1 1010.8 1005.0 1000.1 996.2 998.1 1003.4 1010.5 1016.3 1020.3 1009.0 MAX. QNH PRESSURE IN HPA 1022.7 1021.6 1019.3 1015.6 1012.1 1005.2 1000.6 1003.2 1010.3 1015.0 1021.9 1024.3 1024.3 DAY 10 22 18 10 1 1 8 18 30 27 29 3 MIN. QNH PRESSURE IN HPA 1011.5 1011.0 1005.4 1005.0 1001.6 994.4 990.8 994.2 998.7 1005.1 1010.4 1016.0 990.8 DAY 18 5 2 7 19 24 12 13 10 8 1 31 MEAN QFF PRESSURE IN HPA 1018.0 1017.3 1013.3 1010.9 1005.0 1000.0 996.1 998.0 1003.4 1010.5 1016.5 1020.6 1009.1 MAX. QFF PRESSURE IN HPA 1023.0 1022.0 1019.6 1015.7 1012.1 1005.1 1000.6 1003.1 1010.3 1015.1 1022.2 1024.6 1024.6 DAY 10 22 18 10 1 1 8 18 30 27 29 3 MIN. QFF PRESSURE IN HPA 1011.7 1011.3 1005.6 1005.0 1001.6 994.4 990.7 994.1 998.6 1005.1 1010.5 1016.3 990.7 DAY 18 5 2 7 19 24 12 13 10 8 1 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1014.1 1013.1 1009.1 1006.5 1000.6 995.7 991.7 993.8 999.3 1006.4 1012.7 1016.7 1005.0 MAX. QFE PRESSURE IN HPA 1019.1 1018.1 1014.8 1011.1 1008.1 1001.3 995.9 998.8 1006.7 1010.4 1018.3 1020.4 1020.4 DAY 10 12 18 10 1 1 8 18 30 29 15 3 MIN. QFE PRESSURE IN HPA 1008.4 1005.2 1003.4 1000.1 997.5 989.9 986.8 989.6 994.6 1001.1 1007.1 1012.4 986.8 DAY 7 5 2 7 19 24 12 13 10 8 1 31 MEAN QNH PRESSURE IN HPA 1018.0 1017.0 1013.0 1010.3 1004.5 999.5 995.5 997.6 1003.2 1010.3 1016.6 1020.6 1008.8 MAX. QNH PRESSURE IN HPA 1023.0 1022.0 1018.7 1015.0 1012.0 1005.2 999.7 1002.7 1010.6 1014.3 1022.2 1024.3 1024.3 DAY 10 12 18 10 1 1 8 18 30 29 15 3 MIN. QNH PRESSURE IN HPA 1012.3 1009.1 1007.3 1004.0 1001.3 993.7 990.6 993.4 998.4 1005.0 1011.0 1016.3 990.6 DAY 7 5 2 7 19 24 12 13 10 8 1 31 MEAN QFF PRESSURE IN HPA 1018.3 1017.3 1013.2 1010.5 1004.5 999.4 995.5 997.5 1003.2 1010.4 1016.9 1020.9 1009.0 MAX. QFF PRESSURE IN HPA 1023.3 1022.3 1019.0 1015.2 1012.0 1005.1 999.7 1002.6 1010.6 1014.4 1022.5 1024.7 1024.7 DAY 10 12 18 10 1 1 8 18 30 29 15 3 MIN. QFF PRESSURE IN HPA 1012.5 1009.4 1007.5 1004.0 1001.3 993.7 990.5 993.4 998.4 1005.0 1011.0 1016.6 990.5 DAY 7 5 2 7 19 24 12 13 10 8 1 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1014.9 1013.8 1009.8 1007.2 1001.8 996.7 992.6 995.1 1000.6 1007.3 1013.5 1017.4 1005.9 MAX. QFE PRESSURE IN HPA 1019.6 1018.7 1015.5 1012.4 1009.2 1002.3 996.3 1001.4 1007.1 1011.0 1018.5 1020.6 1020.6 DAY 10 12 17 10 1 1 8 18 30 29 17 3 MIN. QFE PRESSURE IN HPA 1008.5 1005.6 1004.5 1001.0 997.9 991.4 987.8 990.1 996.9 1001.7 1009.2 1013.3 987.8 DAY 17 5 1 7 19 24 12 6 6 8 11 14 MEAN QNH PRESSURE IN HPA 1018.8 1017.7 1013.7 1011.1 1005.6 1000.5 996.5 998.9 1004.5 1011.1 1017.4 1021.4 1009.8 MAX. QNH PRESSURE IN HPA 1023.5 1022.6 1019.4 1016.3 1013.1 1006.2 1000.1 1005.3 1011.0 1014.9 1022.4 1024.5 1024.5 DAY 10 12 17 10 1 1 8 18 30 29 17 3 MIN. QNH PRESSURE IN HPA 1012.4 1009.5 1008.4 1004.9 1001.7 995.2 991.6 993.9 1000.7 1005.6 1013.1 1017.2 991.6 DAY 17 5 1 7 19 24 12 6 6 8 11 14 MEAN QFF PRESSURE IN HPA 1019.1 1018.0 1014.0 1011.2 1005.6 1000.4 996.4 998.8 1004.5 1011.2 1017.7 1021.7 1009.9 MAX. QFF PRESSURE IN HPA 1023.9 1022.9 1019.7 1016.4 1013.1 1006.1 1000.1 1005.2 1011.0 1015.0 1022.7 1024.9 1024.9 DAY 10 12 17 10 1 1 8 18 30 29 17 3 MIN. QFF PRESSURE IN HPA 1012.6 1009.8 1008.6 1005.0 1001.7 995.2 991.5 993.8 1000.7 1005.6 1013.2 1017.5 991.5 DAY 17 5 1 7 19 24 12 6 10 8 11 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1015.0 1014.0 1009.9 1007.6 1002.2 997.2 993.2 995.5 1000.8 1007.5 1013.9 1017.6 1006.2 MAX. QFE PRESSURE IN HPA 1019.6 1018.5 1015.8 1013.5 1008.4 1003.2 997.3 1002.0 1007.6 1011.1 1019.2 1020.4 1020.4 DAY 10 22 18 10 1 1 31 18 30 29 17 4 MIN. QFE PRESSURE IN HPA 1007.9 1006.0 1003.2 1001.4 997.9 991.4 987.8 990.7 997.6 1002.5 1008.9 1012.9 987.8 DAY 17 5 1 7 19 24 12 13 6 8 7 14 MEAN QNH PRESSURE IN HPA 1018.9 1017.9 1013.8 1011.5 1006.0 1001.0 997.1 999.4 1004.7 1011.4 1017.8 1021.5 1010.1 MAX. QNH PRESSURE IN HPA 1023.5 1022.4 1019.7 1017.4 1012.3 1007.1 1001.1 1005.9 1011.5 1015.0 1023.1 1024.3 1024.3 DAY 10 22 18 10 1 1 31 18 30 29 17 4 MIN. QNH PRESSURE IN HPA 1011.8 1009.9 1007.1 1005.3 1001.7 995.2 991.6 994.5 1001.4 1006.4 1012.8 1016.8 991.6 DAY 17 5 1 7 19 24 12 13 6 8 7 14 MEAN QFF PRESSURE IN HPA 1019.1 1018.1 1014.0 1011.6 1006.0 1001.0 997.0 999.3 1004.7 1011.4 1018.0 1021.8 1010.2 MAX. QFF PRESSURE IN HPA 1023.8 1022.8 1020.0 1017.6 1012.3 1007.0 1001.1 1005.8 1011.5 1015.1 1023.3 1024.7 1024.7 DAY 10 22 18 10 1 1 31 18 30 29 17 4 MIN. QFF PRESSURE IN HPA 1012.1 1010.2 1007.3 1005.3 1001.7 995.2 991.6 994.4 1001.4 1006.4 1012.9 1017.0 991.6 DAY 17 5 1 7 19 24 12 13 6 8 7 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.2 13.9 19.0 29.3 33.7 36.3 39.3 38.4 32.6 27.2 18.3 13.7 26.2 MINIMUN AIR TEMPERATURE (C) 6.5 6.8 10.2 20.1 23.4 25.5 29.8 29.0 22.9 18.7 11.8 10.0 17.9 DAYS WITH MINIMUM TEMP. >=21 0 0 2 14 26 30 31 31 28 6 0 0 168 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) 0.5 1.5 4.5 13.0 17.0 23.5 27.0 23.0 19.5 14.0 7.0 4.0 0.5 DAY 18 9 1 1 13 15 5 31 3 21 27 27 MAXIMUM AIR TEMPERATURE (C) 18.4 21.7 27.5 38.2 42.7 45.9 48.6 47.6 42.5 36.6 25.8 18.4 34.5 DAYS WITH MAXIMUM TEMP. >=30 0 1 11 30 31 30 31 31 30 31 3 0 229 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 30.0 35.0 44.0 47.5 51.5 52.0 51.0 45.0 40.5 34.5 27.0 52.0 DAY 2 25 23 21 25 30 1 20 8 10 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.9 14.9 17.3 18.1 19.3 20.4 18.8 18.6 19.6 17.9 14.0 8.4 16.6 MEAN DAILY TEMP. (MDT) (C) 12.5 14.2 18.8 29.1 33.1 35.7 39.2 38.3 32.7 27.7 18.8 14.2 26.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 1.0 26.8 243.8 373.7 441.8 564.8 537.2 351.8 207.0 9.3 1.0 2758.2 HEATING DEG. DAYS(BASE 18 0C) 172.6 115.2 38.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15.8 124.7 466.6 DEWPOINT (MEAN C) 8.6 8.7 10.8 15.4 21.8 23.0 21.9 23.1 16.0 13.2 10.7 11.9 15.4 MIXING RATIO (G/KG) 7.09 7.19 8.47 11.34 17.38 19.01 17.74 19.36 12.39 10.17 8.21 8.84 12.27 VAPOUR PRESSURE (HPA) 11.43 11.58 13.57 18.00 27.17 29.44 27.45 29.94 19.51 16.19 13.20 14.22 19.31 SATURATION DEF. (HPA) 3.44 5.28 10.26 25.44 28.68 34.85 47.47 41.10 32.75 22.10 8.86 2.02 21.85 RELATIVE HUMIDITY (MEAN %) 81 74 61 45 52 49 40 46 41 45 64 90 57 RELATIVE HUMIDITY (MAX. %) 96 94 80 64 66 66 57 70 59 62 83 99 75 RELATIVE HUMIDITY (MIN. %) 61 51 43 28 38 35 25 26 23 30 43 75 40 RELATIVE HUMIDITY (MEAN% 03UTC) 93 93 76 61 61 61 53 64 56 56 80 96 71 RELATIVE HUMIDITY (MEAN% 09UTC) 68 57 47 34 40 41 30 32 31 34 51 79 45 RELATIVE HUMIDITY (MEAN% 15UTC) 73 63 54 35 46 39 31 36 34 39 56 86 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.9 8.3 1.4 1.6 0.0 0.0 0.0 0.0 0.0 0.4 18.0 125.3 185.9 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 6 6 DAYS WITH PRECIPITATION >= 5 3 1 0 0 0 0 0 0 0 0 1 7 12 DAYS WITH PRECIPITATION >= 1 6 2 1 1 0 0 0 0 0 0 5 12 27 DAYS WITH PRECIPITATION 8 2 1 2 0 0 0 0 0 1 5 14 33 GREATEST DAILY PRECIPITATION 9.0 5.3 1.4 1.0 0.0 0.0 0.0 0.0 0.0 0.4 7.0 29.5 29.5 DAY 6 13 25 29 ** ** ** ** ** 3 18 11 DAY WITH THUNDER STORM 1 0 1 1 0 0 0 0 0 0 0 6 9 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 7 4 15 20 24 20 20 19 22 15 5 3 174 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 225 180 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 10.3 9.9 12.7 12.0 13.0 11.6 10.9 9.8 11.1 10.8 9.6 8.0 11.2 PREVAILING WIND PERCENT 26.2 37.1 31.5 37.9 58.5 31.3 13.7 17.7 27.9 35.1 26.3 20.6 29.6 CALMS PERCENT OF WIND 43.1 33.6 30.2 25.0 20.6 25.8 39.9 33.9 43.8 33.5 49.6 50.0 35.8 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 302 296 277 314 311 288 225 234 288 308 299 276 292 VECTOR WIND MAGNITUDE(KNOTS) 1.8 3.8 3.5 5.8 9.3 6.2 3.0 2.8 3.5 4.2 2.4 0.3 3.5 WIND STEADINESES (MEAN %) 29.5 56.7 38.5 68.2 93.0 77.5 50.8 40.6 62.5 58.3 51.1 6.4 50.7 WIND SPEED (MEAN KNOTS) 6.1 6.7 9.1 8.5 10.0 8.0 5.9 6.9 5.6 7.2 4.7 4.7 6.9 FASTEST WIND DIRECTION 160 160 220 310 320 310 100 330 320 340 300 100 220 FASTEST WIND SPEED (KNOTS) 39 39 68 39 37 25 29 29 33 43 29 49 68 DAY 28 25 24 26 20 1 11 18 18 17 4 10 DAYS WITH SKY CLEAR (0-2)/8 17 16 23 10 22 29 22 26 30 21 11 5 232 DAYS WITH P.CLOUDY (3-6)/8 5 11 3 14 8 1 9 5 0 8 11 13 88 DAYS WITH CLOUDY (7-8)/8 9 2 5 6 1 0 0 0 0 2 8 13 46 DAYS WITH VISIBILITY =< 2 KM 3 3 1 2 7 11 15 6 6 2 2 25 83 DURATION OF SUNSHINE HOURS 162.8 199.2 235.3 172.8 274.6 272.4 205.7 270.9 270.6 253.2 179.5 113.6 2610.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.1 1014.8 1011.8 1006.5 1002.1 996.2 993.5 995.4 1001.4 1008.8 1014.5 1016.0 1006.3 MAX. QFE PRESSURE IN HPA 1025.4 1020.8 1018.7 1013.2 1008.9 1001.3 999.3 1001.2 1008.5 1016.2 1020.6 1024.0 1025.4 DAY-HOUR 30- 6 10- 6 3- 9 2- 6 2- 6 17- 6 30- 6 14- 6 29- 6 29- 6 27- 6 17- 6 MIN. QFE PRESSURE IN HPA 1004.3 1007.8 1000.1 1000.2 996.3 990.9 986.4 989.7 993.7 1003.6 1007.8 1004.9 986.4 DAY-HOUR 28- 3 7- 3 23-18 21-12 30-15 30-15 9-15 11-12 1-12 14-15 1-15 10-21 MEAN QNH PRESSURE IN HPA 1019.0 1018.7 1015.7 1010.3 1006.0 1000.0 997.3 999.3 1005.3 1012.7 1018.4 1019.9 1010.2 MAX. QNH PRESSURE IN HPA 1029.3 1024.7 1022.6 1017.1 1012.8 1005.2 1003.2 1005.1 1012.4 1020.1 1024.5 1027.9 1029.3 DAY-HOUR 30- 6 10- 6 3- 9 2- 6 2- 6 17- 6 30- 6 14- 6 29- 6 29- 6 27- 6 17- 6 MIN. QNH PRESSURE IN HPA 1008.2 1011.7 1004.0 1004.1 1000.1 994.7 990.2 993.5 997.5 1007.5 1011.7 1008.8 990.2 DAY-HOUR 28- 3 7- 3 23-18 21-12 30-15 30-15 9-15 11-12 1-12 14-15 1-15 10-21 MEAN QFF PRESSURE IN HPA 1019.3 1019.0 1015.9 1010.4 1006.0 999.9 997.2 999.2 1005.3 1012.8 1018.6 1020.2 1010.3 MAX. QFF PRESSURE IN HPA 1029.7 1025.1 1022.9 1017.2 1012.8 1005.1 1003.1 1005.0 1012.4 1020.3 1024.8 1028.3 1029.7 DAY-HOUR 30- 6 10- 6 3- 9 2- 6 2- 6 17- 6 30- 6 14- 6 29- 6 29- 6 27- 6 17- 6 MIN. QFF PRESSURE IN HPA 1008.4 1012.0 1004.0 1004.1 1000.1 994.6 990.1 993.5 997.5 1007.6 1011.8 1009.0 990.1 DAY-HOUR 28- 3 7- 3 23-18 21-12 30-15 30-15 9-15 11-12 1-12 14-15 1-15 10-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1014.9 1015.0 1012.0 1006.6 1002.3 996.2 993.6 995.4 1001.1 1008.5 1014.2 1015.8 1006.3 MAX. QFE PRESSURE IN HPA 1023.2 1020.0 1018.1 1012.5 1007.2 999.9 998.4 999.7 1006.3 1013.0 1018.1 1022.4 1023.2 DAY 31 11 1 2 3 17 31 14 23 29 24 18 MIN. QFE PRESSURE IN HPA 1006.2 1008.3 1001.1 1001.6 998.0 993.7 987.9 991.6 995.2 1003.9 1008.9 1008.4 987.9 DAY 28 7 24 21 31 24 10 2 1 1 1 11 MEAN QNH PRESSURE IN HPA 1018.9 1018.9 1015.9 1010.5 1006.1 1000.1 997.4 999.2 1004.9 1012.4 1018.1 1019.7 1010.2 MAX. QNH PRESSURE IN HPA 1027.1 1023.9 1022.0 1016.4 1011.1 1003.8 1002.2 1003.6 1010.2 1016.9 1022.0 1026.3 1027.1 DAY 31 11 1 2 3 17 31 14 23 29 24 18 MIN. QNH PRESSURE IN HPA 1010.1 1012.2 1005.0 1005.5 1001.8 997.5 991.7 995.4 999.0 1007.8 1012.8 1012.3 991.7 DAY 28 7 24 21 31 24 10 2 1 1 1 11 MEAN QFF PRESSURE IN HPA 1019.2 1019.1 1016.1 1010.5 1006.1 1000.0 997.3 999.1 1005.0 1012.5 1018.3 1020.0 1010.3 MAX. QFF PRESSURE IN HPA 1027.5 1024.2 1022.3 1016.5 1011.1 1003.7 1002.1 1003.5 1010.1 1017.0 1022.3 1026.7 1027.5 DAY 31 11 1 2 3 17 31 14 23 29 24 18 MIN. QFF PRESSURE IN HPA 1010.3 1012.4 1005.0 1005.5 1001.8 997.5 991.6 995.3 999.1 1007.8 1012.9 1012.5 991.6 DAY 28 7 24 21 31 24 10 2 1 1 1 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1014.8 1014.7 1011.9 1006.6 1002.4 996.7 994.1 995.9 1001.5 1008.8 1014.4 1015.7 1006.5 MAX. QFE PRESSURE IN HPA 1022.9 1019.4 1017.3 1012.2 1007.9 1000.3 998.2 1000.2 1006.1 1014.2 1018.5 1022.4 1022.9 DAY 30 29 3 2 10 17 31 14 23 29 27 18 MIN. QFE PRESSURE IN HPA 1004.3 1007.8 1002.3 1001.9 997.8 994.4 988.1 991.3 995.7 1004.3 1008.3 1008.7 988.1 DAY 28 7 24 21 31 23 10 11 1 1 1 10 MEAN QNH PRESSURE IN HPA 1018.7 1018.6 1015.8 1010.5 1006.2 1000.6 998.0 999.7 1005.3 1012.6 1018.3 1019.6 1010.3 MAX. QNH PRESSURE IN HPA 1026.8 1023.3 1021.2 1016.1 1011.8 1004.2 1002.0 1004.1 1010.0 1018.1 1022.4 1026.3 1026.8 DAY 30 29 3 2 10 17 31 14 23 29 27 18 MIN. QNH PRESSURE IN HPA 1008.2 1011.7 1006.2 1005.8 1001.6 998.2 991.9 995.1 999.5 1008.2 1012.2 1012.6 991.9 DAY 28 7 24 21 31 23 10 11 1 1 1 10 MEAN QFF PRESSURE IN HPA 1019.0 1019.0 1016.0 1010.6 1006.2 1000.5 997.9 999.7 1005.4 1012.8 1018.5 1019.9 1010.5 MAX. QFF PRESSURE IN HPA 1027.2 1023.6 1021.5 1016.3 1011.8 1004.2 1002.0 1004.0 1010.0 1018.3 1022.7 1026.7 1027.2 DAY 30 29 3 2 10 17 31 14 23 29 27 18 MIN. QFF PRESSURE IN HPA 1008.4 1012.0 1006.2 1005.8 1001.6 998.2 991.8 995.1 999.6 1008.2 1012.3 1012.8 991.8 DAY 28 7 24 21 31 23 10 11 1 1 1 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.1 1016.1 1013.2 1007.9 1003.5 997.6 994.9 997.0 1002.8 1010.3 1015.7 1017.3 1007.7 MAX. QFE PRESSURE IN HPA 1025.4 1020.8 1018.6 1013.2 1008.9 1001.3 999.3 1001.2 1008.5 1016.2 1020.6 1024.0 1025.4 DAY 30 10 3 2 2 17 30 14 29 29 27 17 MIN. QFE PRESSURE IN HPA 1005.6 1010.7 1003.3 1003.7 998.9 994.5 988.7 992.8 996.3 1005.8 1009.2 1010.4 988.7 DAY 28 7 24 21 25 23 10 11 2 1 1 10 MEAN QNH PRESSURE IN HPA 1020.1 1020.0 1017.1 1011.8 1007.3 1001.4 998.7 1000.8 1006.6 1014.2 1019.6 1021.2 1011.6 MAX. QNH PRESSURE IN HPA 1029.3 1024.7 1022.5 1017.1 1012.8 1005.2 1003.2 1005.1 1012.4 1020.1 1024.5 1027.9 1029.3 DAY 30 10 3 2 2 17 30 14 29 29 27 17 MIN. QNH PRESSURE IN HPA 1009.5 1014.6 1007.2 1007.6 1002.8 998.3 992.5 996.6 1000.1 1009.7 1013.1 1014.3 992.5 DAY 28 7 24 21 25 23 10 11 2 1 1 10 MEAN QFF PRESSURE IN HPA 1020.4 1020.3 1017.3 1011.9 1007.3 1001.4 998.7 1000.8 1006.7 1014.3 1019.9 1021.5 1011.7 MAX. QFF PRESSURE IN HPA 1029.7 1025.1 1022.8 1017.2 1012.8 1005.1 1003.1 1005.0 1012.4 1020.3 1024.8 1028.3 1029.7 DAY 30 10 3 2 2 17 30 14 29 29 27 17 MIN. QFF PRESSURE IN HPA 1009.7 1014.9 1007.2 1007.6 1002.7 998.3 992.4 996.6 1000.2 1009.7 1013.2 1014.5 992.4 DAY 28 7 24 21 25 23 10 11 2 1 1 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1015.6 1015.7 1012.6 1007.3 1002.9 997.0 994.2 996.2 1002.3 1009.5 1015.2 1016.7 1007.1 MAX. QFE PRESSURE IN HPA 1024.8 1020.6 1018.7 1012.4 1008.3 1000.7 998.0 999.5 1008.1 1014.7 1019.3 1023.3 1024.8 DAY 30 10 3 1 2 16 30 14 29 30 27 17 MIN. QFE PRESSURE IN HPA 1005.6 1009.8 1003.2 1001.0 998.5 993.9 988.3 991.5 995.5 1005.3 1008.8 1009.3 988.3 DAY 28 25 24 21 25 23 10 11 1 1 1 10 MEAN QNH PRESSURE IN HPA 1019.5 1019.6 1016.5 1011.2 1006.8 1000.8 998.0 1000.0 1006.2 1013.4 1019.1 1020.6 1011.0 MAX. QNH PRESSURE IN HPA 1028.7 1024.5 1022.6 1016.3 1012.2 1004.6 1001.8 1003.4 1012.0 1018.6 1023.2 1027.2 1028.7 DAY 30 10 3 1 2 16 30 14 29 30 27 17 MIN. QNH PRESSURE IN HPA 1009.5 1013.7 1007.1 1004.9 1002.3 997.7 992.1 995.3 999.3 1009.2 1012.7 1013.2 992.1 DAY 28 25 24 21 25 23 10 11 1 1 1 10 MEAN QFF PRESSURE IN HPA 1019.8 1019.9 1016.7 1011.2 1006.7 1000.7 997.9 999.9 1006.2 1013.4 1019.3 1020.9 1011.0 MAX. QFF PRESSURE IN HPA 1029.1 1024.9 1022.9 1016.4 1012.2 1004.5 1001.7 1003.3 1012.0 1018.8 1023.5 1027.6 1029.1 DAY 30 10 3 1 2 16 30 14 29 30 27 17 MIN. QFF PRESSURE IN HPA 1009.7 1013.8 1007.1 1004.9 1002.3 997.7 992.0 995.2 999.3 1009.2 1012.8 1013.4 992.0 DAY 28 25 24 21 25 23 10 11 1 1 1 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.1 1013.7 1010.8 1005.7 1001.3 995.4 992.5 994.4 1000.5 1008.0 1013.7 1015.5 1005.5 MAX. QFE PRESSURE IN HPA 1022.9 1018.8 1017.3 1011.3 1006.5 999.2 996.5 998.5 1005.8 1013.1 1017.2 1022.3 1022.9 DAY 30 10 3 1 2 16 30 13 29 30 27 17 MIN. QFE PRESSURE IN HPA 1004.8 1008.2 1002.4 1000.2 996.9 992.4 986.8 989.7 993.7 1003.8 1007.9 1008.4 986.8 DAY 28 6 24 21 30 30 10 11 1 1 1 14 MEAN QNH PRESSURE IN HPA 1018.0 1017.6 1014.7 1009.5 1005.2 999.2 996.4 998.3 1004.3 1011.9 1017.6 1019.4 1009.3 MAX. QNH PRESSURE IN HPA 1026.8 1022.7 1021.2 1015.2 1010.4 1003.1 1000.3 1002.3 1009.7 1017.0 1021.1 1026.2 1026.8 DAY 30 10 3 1 2 16 30 13 29 30 27 17 MIN. QNH PRESSURE IN HPA 1008.7 1012.1 1006.3 1004.1 1000.7 996.2 990.6 993.5 997.5 1007.7 1011.8 1012.3 990.6 DAY 28 6 24 21 30 30 10 11 1 1 1 14 MEAN QFF PRESSURE IN HPA 1018.3 1017.9 1014.9 1009.6 1005.2 999.2 996.3 998.2 1004.3 1011.9 1017.8 1019.7 1009.4 MAX. QFF PRESSURE IN HPA 1027.2 1023.0 1021.5 1015.3 1010.4 1003.0 1000.3 1002.3 1009.7 1017.1 1021.4 1026.6 1027.2 DAY 30 10 3 1 2 16 30 13 29 30 27 17 MIN. QFF PRESSURE IN HPA 1008.9 1012.4 1006.3 1004.1 1000.7 996.1 990.5 993.5 997.5 1007.7 1011.9 1012.6 990.5 DAY 28 6 24 21 30 30 10 11 1 1 1 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1014.3 1013.7 1010.6 1005.2 1000.8 994.6 991.9 993.9 1000.3 1008.0 1013.9 1015.6 1005.2 MAX. QFE PRESSURE IN HPA 1023.4 1019.3 1016.7 1010.3 1006.3 998.4 995.7 998.1 1005.6 1013.0 1017.5 1022.8 1023.4 DAY 30 10 3 1 2 16 30 13 22 29 25 17 MIN. QFE PRESSURE IN HPA 1005.1 1007.9 1000.4 1000.7 996.3 990.9 986.4 989.7 993.8 1003.6 1007.8 1006.8 986.4 DAY 28 6 23 21 30 30 9 11 1 14 1 10 MEAN QNH PRESSURE IN HPA 1018.2 1017.6 1014.4 1009.1 1004.7 998.5 995.7 997.7 1004.2 1011.9 1017.8 1019.5 1009.1 MAX. QNH PRESSURE IN HPA 1027.3 1023.2 1020.6 1014.2 1010.2 1002.2 999.5 1001.9 1009.5 1016.9 1021.4 1026.7 1027.3 DAY 30 10 3 1 2 16 30 13 22 29 25 17 MIN. QNH PRESSURE IN HPA 1009.0 1011.8 1004.3 1004.6 1000.1 994.7 990.2 993.5 997.6 1007.5 1011.7 1010.7 990.2 DAY 28 6 23 21 30 30 9 11 1 14 1 10 MEAN QFF PRESSURE IN HPA 1018.6 1017.9 1014.7 1009.1 1004.7 998.4 995.7 997.7 1004.2 1012.0 1018.0 1019.8 1009.2 MAX. QFF PRESSURE IN HPA 1027.7 1023.6 1020.9 1014.4 1010.2 1002.2 999.5 1001.9 1009.5 1017.1 1021.7 1027.1 1027.7 DAY 30 10 3 1 2 16 30 13 22 29 25 17 MIN. QFF PRESSURE IN HPA 1009.2 1012.1 1004.3 1004.6 1000.1 994.6 990.1 993.5 997.6 1007.6 1011.8 1010.9 990.1 DAY 28 6 23 21 30 30 9 11 1 14 1 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1015.3 1014.7 1011.4 1006.1 1001.8 995.7 993.2 995.1 1001.3 1008.6 1014.5 1016.0 1006.1 MAX. QFE PRESSURE IN HPA 1024.5 1020.0 1018.0 1011.9 1007.1 999.7 996.7 998.9 1006.3 1013.5 1017.9 1023.0 1024.5 DAY 30 10 3 1 2 16 25 13 22 29 25 17 MIN. QFE PRESSURE IN HPA 1006.2 1008.4 1000.1 1001.6 997.3 991.7 987.5 991.2 994.8 1004.4 1009.3 1006.3 987.5 DAY 28 6 23 14 31 30 9 1 1 14 1 10 MEAN QNH PRESSURE IN HPA 1019.2 1018.6 1015.3 1009.9 1005.6 999.5 997.0 998.9 1005.2 1012.5 1018.4 1019.9 1010.0 MAX. QNH PRESSURE IN HPA 1028.4 1023.9 1021.9 1015.8 1011.0 1003.6 1000.5 1002.8 1010.2 1017.4 1021.8 1026.9 1028.4 DAY 30 10 3 1 2 16 25 13 22 29 25 17 MIN. QNH PRESSURE IN HPA 1010.1 1012.3 1004.0 1005.5 1001.1 995.5 991.3 995.0 998.6 1008.3 1013.2 1010.2 991.3 DAY 28 6 23 14 31 30 9 1 1 14 1 10 MEAN QFF PRESSURE IN HPA 1019.5 1018.9 1015.5 1010.0 1005.6 999.5 997.0 998.9 1005.2 1012.6 1018.7 1020.2 1010.1 MAX. QFF PRESSURE IN HPA 1028.8 1024.3 1022.2 1016.0 1011.0 1003.5 1000.5 1002.7 1010.2 1017.6 1022.1 1027.3 1028.8 DAY 30 10 3 1 2 16 25 13 22 29 25 17 MIN. QFF PRESSURE IN HPA 1010.3 1012.6 1004.0 1005.5 1001.1 995.4 991.2 994.9 998.6 1008.3 1013.3 1010.4 991.2 DAY 28 6 23 14 31 30 9 1 1 14 1 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1015.5 1015.1 1012.0 1006.5 1002.3 996.2 993.7 995.7 1001.6 1008.8 1014.6 1015.8 1006.5 MAX. QFE PRESSURE IN HPA 1024.0 1020.6 1018.0 1012.9 1008.0 1000.1 997.8 999.6 1006.5 1013.7 1018.4 1022.4 1024.0 DAY 30 10 3 1 2 16 25 13 22 28 24 17 MIN. QFE PRESSURE IN HPA 1007.3 1008.7 1001.3 1001.8 998.1 992.4 988.2 991.8 995.4 1004.4 1009.3 1004.9 988.2 DAY 28 6 23 20 31 30 9 10 2 14 1 10 MEAN QNH PRESSURE IN HPA 1019.4 1019.0 1015.9 1010.4 1006.2 1000.0 997.6 999.5 1005.5 1012.7 1018.5 1019.7 1010.4 MAX. QNH PRESSURE IN HPA 1027.9 1024.5 1021.9 1016.8 1011.9 1004.0 1001.6 1003.5 1010.4 1017.6 1022.3 1026.3 1027.9 DAY 30 10 3 1 2 16 25 13 22 28 24 17 MIN. QNH PRESSURE IN HPA 1011.2 1012.6 1005.2 1005.7 1001.9 996.2 992.0 995.6 999.2 1008.3 1013.2 1008.8 992.0 DAY 28 6 23 20 31 30 9 10 2 14 1 10 MEAN QFF PRESSURE IN HPA 1019.7 1019.3 1016.1 1010.5 1006.1 1000.0 997.5 999.4 1005.5 1012.8 1018.7 1020.0 1010.5 MAX. QFF PRESSURE IN HPA 1028.3 1024.9 1022.2 1016.9 1011.9 1003.9 1001.6 1003.4 1010.4 1017.7 1022.6 1026.7 1028.3 DAY 30 10 3 1 2 16 25 13 29 28 24 17 MIN. QFF PRESSURE IN HPA 1011.4 1012.9 1005.2 1005.7 1001.9 996.1 991.9 995.5 999.3 1008.3 1013.3 1009.0 991.9 DAY 28 6 23 20 31 30 9 10 2 14 1 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.8 14.0 20.4 27.1 33.4 36.2 37.7 37.9 33.5 28.4 18.6 16.3 26.3 MINIMUN AIR TEMPERATURE (C) 6.3 7.2 12.1 17.4 22.8 25.0 27.2 28.9 23.5 20.0 10.8 12.3 17.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 3 23 30 31 31 29 9 1 0 157 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 1 0 1 TEMPERATURE RECORDS LOWEST(C) 1.5 3.0 7.5 13.0 17.0 21.0 25.0 25.5 20.5 17.0 0.0 4.0 0.0 DAY 29 1 1 14 10 2 1 24 12 3 25 22 MAXIMUM AIR TEMPERATURE (C) 18.0 21.3 29.0 36.1 42.4 45.9 47.3 47.2 43.3 37.6 27.3 21.4 34.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 11 30 31 30 31 31 30 31 10 0 235 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 26.0 36.5 41.5 47.5 50.5 50.0 51.0 46.0 42.0 36.0 26.0 51.0 DAY 3 28 31 25 15 23 28 4 1 10 6 9 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 14.1 16.9 18.7 19.6 20.9 20.1 18.3 19.8 17.6 16.5 9.1 16.9 MEAN DAILY TEMP. (MDT) (C) 12.2 14.2 20.5 26.7 32.6 35.5 37.2 38.0 33.4 28.8 19.1 16.8 26.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 18.8 171.7 359.0 433.7 503.0 527.7 372.5 240.5 29.1 0.0 2656.1 HEATING DEG. DAYS(BASE 18 0C) 180.7 105.4 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 47.3 47.1 381.1 DEWPOINT (MEAN C) 9.3 7.7 11.0 11.9 15.0 19.3 16.3 20.9 14.2 13.0 5.4 13.4 13.1 MIXING RATIO (G/KG) 7.37 6.66 8.39 8.88 11.62 15.17 12.57 16.45 10.70 9.85 5.89 9.75 10.28 VAPOUR PRESSURE (HPA) 11.89 10.74 13.44 14.17 18.29 23.62 19.62 25.64 16.92 15.69 9.50 15.67 16.26 SATURATION DEF. (HPA) 2.41 6.05 11.94 24.05 36.55 40.46 49.67 43.67 37.84 25.03 13.94 3.34 24.58 RELATIVE HUMIDITY (MEAN %) 86 69 59 42 35 39 31 42 35 43 46 84 51 RELATIVE HUMIDITY (MAX. %) 99 90 81 62 50 55 46 66 57 63 67 96 69 RELATIVE HUMIDITY (MIN. %) 63 45 37 25 24 27 18 21 17 25 28 65 33 RELATIVE HUMIDITY (MEAN% 03UTC) 98 88 78 58 44 51 43 61 51 58 61 94 65 RELATIVE HUMIDITY (MEAN% 09UTC) 73 54 43 29 27 32 21 27 23 28 32 71 38 RELATIVE HUMIDITY (MEAN% 15UTC) 81 56 46 32 31 35 25 28 24 35 39 82 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 27.4 12.2 17.8 0.0 1.4 0.0 0.0 0.0 0.0 1.2 5.9 138.5 204.4 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 5 5 DAYS WITH PRECIPITATION >= 5 2 1 1 0 0 0 0 0 0 0 0 9 13 DAYS WITH PRECIPITATION >= 1 6 3 5 0 1 0 0 0 0 0 2 13 30 DAYS WITH PRECIPITATION 6 3 5 0 1 0 0 0 0 2 4 14 35 GREATEST DAILY PRECIPITATION 8.0 8.2 7.0 0.0 1.4 0.0 0.0 0.0 0.0 0.8 2.5 32.0 32.0 DAY 3 15 25 ** 3 ** ** ** ** 28 23 2 DAY WITH THUNDER STORM 3 1 8 1 2 0 0 0 0 3 2 11 31 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 5 15 9 14 19 14 24 18 13 11 14 5 161 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 180 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 9.0 10.3 10.8 11.8 12.6 12.5 11.2 9.4 10.8 9.5 10.1 8.6 11.0 PREVAILING WIND PERCENT 26.6 31.7 25.4 35.4 48.0 47.9 32.7 23.4 19.2 21.0 27.5 14.9 28.3 CALMS PERCENT OF WIND 52.4 42.0 45.6 42.5 22.2 24.6 34.7 31.5 39.2 48.0 48.8 58.5 40.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 304 299 285 313 313 300 287 214 264 282 301 92 293 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.2 1.9 4.3 5.6 6.0 3.9 3.4 2.0 1.7 2.0 0.5 2.6 WIND STEADINESES (MEAN %) 44.2 35.5 32.8 66.2 57.7 72.3 55.7 51.5 32.3 34.7 37.0 12.5 41.3 WIND SPEED (MEAN KNOTS) 4.3 6.2 5.8 6.5 9.7 8.3 7.0 6.6 6.2 4.9 5.4 4.0 6.3 FASTEST WIND DIRECTION 180 170 320 180 330 310 300 170 290 180 180 110 180 FASTEST WIND SPEED (KNOTS) 31 33 35 29 35 29 25 23 23 27 37 25 37 DAY 3 18 17 8 17 10 2 26 1 23 18 1 DAYS WITH SKY CLEAR (0-2)/8 17 13 17 12 19 30 29 31 29 21 15 8 241 DAYS WITH P.CLOUDY (3-6)/8 8 13 10 11 8 0 2 0 1 9 12 11 85 DAYS WITH CLOUDY (7-8)/8 6 2 4 7 4 0 0 0 0 1 3 12 39 DAYS WITH VISIBILITY =< 2 KM 17 6 0 0 0 1 0 2 1 3 2 8 40 DURATION OF SUNSHINE HOURS 197.5 206.2 262.3 244.6 293.1 301.6 316.9 332.6 303.7 254.3 211.6 138.0 3062.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.4 1014.3 1010.2 1007.3 1001.0 995.0 993.6 996.8 1002.4 1008.1 1014.1 1016.3 1006.3 MAX. QFE PRESSURE IN HPA 1023.3 1020.0 1018.4 1014.0 1006.6 1001.9 997.9 1001.0 1009.4 1013.8 1022.1 1024.4 1024.4 DAY-HOUR 30- 6 10- 6 4- 6 1- 6 1- 6 1- 6 15- 6 6- 6 23- 6 31-21 20- 6 22- 6 MIN. QFE PRESSURE IN HPA 1009.3 1005.5 1000.1 1000.7 993.7 990.0 989.5 991.5 996.5 1001.5 1004.9 1007.6 989.5 DAY-HOUR 19-15 21- 3 25- 3 26- 0 28-15 16-15 4-15 3-15 2-15 1- 0 18-12 5- 3 MEAN QNH PRESSURE IN HPA 1020.3 1018.2 1014.1 1011.2 1004.9 998.9 997.4 1000.6 1006.3 1012.0 1018.0 1020.2 1010.2 MAX. QNH PRESSURE IN HPA 1027.2 1023.9 1022.3 1017.9 1010.5 1005.8 1001.7 1004.9 1013.3 1017.7 1026.0 1028.3 1028.3 DAY-HOUR 30- 6 10- 6 4- 6 1- 6 1- 6 1- 6 15- 6 6- 6 23- 6 31-21 20- 6 22- 6 MIN. QNH PRESSURE IN HPA 1013.2 1009.4 1004.0 1004.6 997.5 993.8 993.3 995.3 1000.3 1005.4 1008.8 1011.5 993.3 DAY-HOUR 19-15 21- 3 25- 3 26- 0 28-15 16-15 4-15 3-15 2-15 1- 0 18-12 5- 3 MEAN QFF PRESSURE IN HPA 1020.6 1018.5 1014.3 1011.3 1004.9 998.8 997.4 1000.5 1006.3 1012.0 1018.2 1020.4 1010.3 MAX. QFF PRESSURE IN HPA 1027.6 1024.2 1022.5 1018.0 1010.6 1005.7 1001.7 1004.8 1013.3 1017.8 1026.4 1028.7 1028.7 DAY-HOUR 30- 6 10- 6 4- 6 1- 6 1- 6 1- 6 15- 6 6- 6 23- 6 31-21 20- 6 22- 6 MIN. QFF PRESSURE IN HPA 1013.5 1009.6 1004.1 1004.6 997.5 993.8 993.3 995.2 1000.4 1005.4 1008.9 1011.7 993.3 DAY-HOUR 19-15 21- 3 25- 3 26- 0 28-15 16-15 4-15 3-15 2-15 1- 0 18-12 5- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.2 1014.4 1010.2 1007.4 1001.3 995.5 993.7 996.6 1002.1 1007.7 1014.0 1016.1 1006.3 MAX. QFE PRESSURE IN HPA 1021.1 1017.7 1015.7 1011.6 1005.3 1001.6 996.6 999.8 1007.6 1010.8 1021.3 1022.9 1022.9 DAY 30 1 1 2 7 1 15 6 23 20 21 23 MIN. QFE PRESSURE IN HPA 1011.0 1006.6 1000.5 1000.7 995.8 991.2 990.7 993.1 997.8 1001.5 1005.1 1007.9 990.7 DAY 20 21 25 26 30 16 18 4 1 1 18 5 MEAN QNH PRESSURE IN HPA 1020.1 1018.3 1014.1 1011.3 1005.2 999.3 997.5 1000.5 1006.0 1011.5 1017.9 1020.0 1010.1 MAX. QNH PRESSURE IN HPA 1025.0 1021.6 1019.6 1015.5 1009.2 1005.5 1000.4 1003.7 1011.5 1014.7 1025.2 1026.8 1026.8 DAY 30 1 1 2 7 1 15 6 23 20 21 23 MIN. QNH PRESSURE IN HPA 1014.9 1010.5 1004.4 1004.6 999.6 995.0 994.5 996.9 1001.6 1005.4 1009.0 1011.8 994.5 DAY 20 21 25 26 30 16 18 4 1 1 18 5 MEAN QFF PRESSURE IN HPA 1020.4 1018.6 1014.3 1011.4 1005.2 999.3 997.4 1000.4 1006.0 1011.6 1018.1 1020.3 1010.2 MAX. QFF PRESSURE IN HPA 1025.4 1022.0 1019.8 1015.6 1009.2 1005.4 1000.4 1003.6 1011.5 1014.7 1025.6 1027.2 1027.2 DAY 30 1 1 2 7 1 15 6 23 20 21 23 MIN. QFF PRESSURE IN HPA 1015.2 1010.7 1004.5 1004.6 999.6 995.0 994.5 996.9 1001.6 1005.4 1009.1 1012.0 994.5 DAY 20 21 25 26 30 16 18 4 1 1 18 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1014.1 1010.3 1007.4 1001.4 995.6 994.2 997.3 1002.5 1008.0 1014.3 1016.0 1006.4 MAX. QFE PRESSURE IN HPA 1021.4 1017.9 1016.7 1012.5 1005.0 1001.2 996.8 1000.1 1008.0 1011.4 1021.2 1022.9 1022.9 DAY 30 1 1 1 7 1 28 6 23 24 20 22 MIN. QFE PRESSURE IN HPA 1010.5 1005.5 1000.1 1002.0 995.8 992.0 991.4 994.1 998.2 1001.9 1005.5 1007.6 991.4 DAY 19 21 25 26 28 12 18 24 1 1 18 5 MEAN QNH PRESSURE IN HPA 1020.0 1018.0 1014.1 1011.3 1005.2 999.4 998.0 1001.2 1006.4 1011.9 1018.2 1019.9 1010.3 MAX. QNH PRESSURE IN HPA 1025.3 1021.8 1020.6 1016.4 1008.9 1005.1 1000.6 1004.0 1011.9 1015.3 1025.1 1026.8 1026.8 DAY 30 1 1 1 7 1 28 6 23 24 20 22 MIN. QNH PRESSURE IN HPA 1014.4 1009.4 1004.0 1005.9 999.6 995.8 995.2 997.9 1002.0 1005.8 1009.4 1011.5 995.2 DAY 19 21 25 26 28 12 18 24 1 1 18 5 MEAN QFF PRESSURE IN HPA 1020.3 1018.3 1014.4 1011.4 1005.3 999.4 998.0 1001.1 1006.4 1012.0 1018.5 1020.2 1010.4 MAX. QFF PRESSURE IN HPA 1025.7 1022.2 1020.9 1016.5 1009.0 1005.1 1000.6 1003.9 1011.9 1015.4 1025.5 1027.2 1027.2 DAY 30 1 1 1 7 1 28 6 23 24 20 22 MIN. QFF PRESSURE IN HPA 1014.7 1009.6 1004.1 1005.9 999.6 995.8 995.2 997.9 1002.0 1005.8 1009.5 1011.7 995.2 DAY 19 21 25 26 28 12 18 24 1 1 18 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.5 1015.5 1011.7 1008.7 1002.2 996.2 994.9 998.3 1004.0 1009.6 1015.6 1017.5 1007.6 MAX. QFE PRESSURE IN HPA 1023.3 1020.0 1018.4 1014.0 1006.6 1001.9 997.9 1001.0 1009.4 1013.4 1022.1 1024.4 1024.4 DAY 30 10 4 1 1 1 15 6 23 20 20 22 MIN. QFE PRESSURE IN HPA 1012.7 1007.0 1001.0 1003.6 996.9 992.7 992.6 994.8 999.4 1003.3 1006.4 1009.0 992.6 DAY 19 21 25 26 29 16 17 24 2 1 18 5 MEAN QNH PRESSURE IN HPA 1021.4 1019.4 1015.6 1012.6 1006.0 1000.1 998.7 1002.2 1007.8 1013.5 1019.5 1021.4 1011.5 MAX. QNH PRESSURE IN HPA 1027.2 1023.9 1022.3 1017.9 1010.5 1005.8 1001.7 1004.9 1013.3 1017.3 1026.0 1028.3 1028.3 DAY 30 10 4 1 1 1 15 6 23 20 20 22 MIN. QNH PRESSURE IN HPA 1016.6 1010.9 1004.9 1007.5 1000.7 996.5 996.4 998.6 1003.3 1007.2 1010.3 1012.9 996.4 DAY 19 21 25 26 29 16 17 24 2 1 18 5 MEAN QFF PRESSURE IN HPA 1021.7 1019.7 1015.8 1012.7 1006.1 1000.1 998.7 1002.1 1007.8 1013.6 1019.8 1021.7 1011.6 MAX. QFF PRESSURE IN HPA 1027.6 1024.2 1022.5 1018.0 1010.6 1005.7 1001.7 1004.8 1013.3 1017.4 1026.4 1028.7 1028.7 DAY 30 10 4 1 1 1 15 6 23 20 20 22 MIN. QFF PRESSURE IN HPA 1016.9 1011.1 1005.0 1007.5 1000.7 996.5 996.4 998.6 1003.3 1007.2 1010.4 1013.1 996.4 DAY 19 21 25 26 29 16 17 24 2 1 18 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1015.2 1011.3 1008.3 1001.8 995.8 994.3 997.5 1003.3 1008.8 1014.6 1016.7 1007.0 MAX. QFE PRESSURE IN HPA 1022.7 1018.9 1018.0 1013.7 1006.6 1001.1 996.9 999.9 1008.7 1012.6 1022.0 1023.8 1023.8 DAY 30 1 2 1 1 1 28 6 23 20 20 22 MIN. QFE PRESSURE IN HPA 1011.5 1006.9 1001.7 1005.0 996.2 992.5 991.9 993.9 998.7 1003.6 1005.1 1008.7 991.9 DAY 3 18 25 25 28 16 17 24 2 1 18 5 MEAN QNH PRESSURE IN HPA 1021.0 1019.1 1015.2 1012.2 1005.6 999.6 998.1 1001.4 1007.1 1012.7 1018.5 1020.6 1010.9 MAX. QNH PRESSURE IN HPA 1026.6 1022.8 1021.9 1017.6 1010.5 1005.0 1000.7 1003.8 1012.6 1016.5 1025.9 1027.7 1027.7 DAY 30 1 2 1 1 1 28 6 23 20 20 22 MIN. QNH PRESSURE IN HPA 1015.4 1010.8 1005.6 1008.9 1000.0 996.3 995.7 997.7 1002.6 1007.5 1009.0 1012.6 995.7 DAY 3 18 25 25 28 16 17 24 2 1 18 5 MEAN QFF PRESSURE IN HPA 1021.3 1019.3 1015.3 1012.2 1005.6 999.5 998.1 1001.3 1007.1 1012.7 1018.7 1020.8 1011.0 MAX. QFF PRESSURE IN HPA 1027.0 1023.2 1022.1 1017.7 1010.5 1004.9 1000.7 1003.7 1012.6 1016.6 1026.3 1028.1 1028.1 DAY 30 1 2 1 1 1 28 6 23 20 20 22 MIN. QFF PRESSURE IN HPA 1015.6 1011.0 1005.7 1008.9 1000.0 996.3 995.7 997.7 1002.5 1007.5 1009.1 1012.8 995.7 DAY 3 18 25 25 28 16 17 24 2 1 18 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.7 1013.4 1009.1 1006.6 1000.3 994.0 992.7 995.7 1001.5 1007.1 1013.0 1015.5 1005.4 MAX. QFE PRESSURE IN HPA 1021.4 1016.9 1015.2 1011.7 1004.6 999.2 994.9 998.3 1006.4 1010.7 1020.5 1022.2 1022.2 DAY 30 10 1 1 6 1 7 5 22 20 20 22 MIN. QFE PRESSURE IN HPA 1009.9 1005.9 1000.8 1002.2 994.2 990.8 990.0 992.5 996.9 1002.6 1004.9 1008.2 990.0 DAY 19 18 25 25 28 16 17 3 2 1 18 5 MEAN QNH PRESSURE IN HPA 1019.6 1017.3 1013.0 1010.5 1004.1 997.9 996.6 999.6 1005.3 1011.0 1016.9 1019.4 1009.3 MAX. QNH PRESSURE IN HPA 1025.3 1020.8 1019.1 1015.6 1008.5 1003.1 998.7 1002.1 1010.3 1014.6 1024.4 1026.1 1026.1 DAY 30 10 1 1 6 1 7 5 22 20 20 22 MIN. QNH PRESSURE IN HPA 1013.8 1009.8 1004.7 1006.1 998.0 994.6 993.8 996.3 1000.7 1006.5 1008.8 1012.1 993.8 DAY 19 18 25 25 28 16 17 3 2 1 18 5 MEAN QFF PRESSURE IN HPA 1019.9 1017.5 1013.2 1010.5 1004.1 997.8 996.5 999.5 1005.3 1011.0 1017.1 1019.6 1009.4 MAX. QFF PRESSURE IN HPA 1025.7 1021.1 1019.3 1015.7 1008.5 1003.0 998.7 1002.1 1010.3 1014.7 1024.8 1026.5 1026.5 DAY 30 10 1 1 6 1 7 5 22 31 20 22 MIN. QFF PRESSURE IN HPA 1014.1 1010.0 1004.8 1006.1 998.0 994.6 993.7 996.2 1000.7 1006.5 1008.9 1012.3 993.7 DAY 19 18 25 25 28 16 17 3 2 1 18 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1015.7 1013.2 1009.1 1006.1 999.7 993.4 992.1 995.2 1001.3 1007.2 1013.2 1015.9 1005.2 MAX. QFE PRESSURE IN HPA 1021.4 1016.4 1015.2 1011.5 1003.9 998.6 994.4 998.4 1006.3 1011.2 1020.6 1022.0 1022.0 DAY 30 1 1 1 6 1 7 5 22 31 20 22 MIN. QFE PRESSURE IN HPA 1009.3 1007.7 1000.5 1001.7 993.7 990.0 989.5 991.5 996.5 1003.0 1005.4 1008.8 989.5 DAY 19 20 24 25 28 16 4 3 2 1 11 4 MEAN QNH PRESSURE IN HPA 1019.6 1017.1 1013.0 1010.0 1003.5 997.3 995.9 999.1 1005.2 1011.1 1017.1 1019.8 1009.1 MAX. QNH PRESSURE IN HPA 1025.3 1020.3 1019.1 1015.4 1007.8 1002.4 998.2 1002.2 1010.2 1015.1 1024.5 1025.9 1025.9 DAY 30 1 1 1 6 1 7 5 22 31 20 22 MIN. QNH PRESSURE IN HPA 1013.2 1011.6 1004.4 1005.6 997.5 993.8 993.3 995.3 1000.3 1006.9 1009.3 1012.7 993.3 DAY 19 20 24 25 28 16 4 3 2 1 11 4 MEAN QFF PRESSURE IN HPA 1019.9 1017.4 1013.2 1010.1 1003.6 997.2 995.9 999.0 1005.2 1011.2 1017.4 1020.0 1009.2 MAX. QFF PRESSURE IN HPA 1025.7 1020.7 1019.4 1015.5 1007.8 1002.4 998.2 1002.2 1010.2 1015.2 1024.9 1026.3 1026.3 DAY 30 1 1 1 6 1 7 5 22 31 20 22 MIN. QFF PRESSURE IN HPA 1013.5 1011.9 1004.5 1005.6 997.5 993.8 993.3 995.2 1000.4 1006.9 1009.5 1012.9 993.3 DAY 19 20 24 25 28 16 4 3 2 1 11 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1016.4 1014.2 1009.8 1007.0 1000.6 994.6 993.2 996.5 1002.3 1008.2 1014.1 1016.4 1006.1 MAX. QFE PRESSURE IN HPA 1021.8 1017.0 1015.5 1012.0 1004.8 999.8 995.9 999.5 1007.3 1013.2 1020.8 1023.0 1023.0 DAY 30 1 1 1 4 1 27 5 22 31 20 22 MIN. QFE PRESSURE IN HPA 1010.3 1008.3 1000.5 1001.6 994.4 991.1 990.5 993.0 997.5 1003.4 1006.5 1008.4 990.5 DAY 19 20 24 25 28 16 4 23 2 3 17 4 MEAN QNH PRESSURE IN HPA 1020.3 1018.1 1013.7 1010.8 1004.5 998.5 997.0 1000.4 1006.2 1012.0 1018.0 1020.3 1010.0 MAX. QNH PRESSURE IN HPA 1025.7 1020.9 1019.4 1015.9 1008.7 1003.7 999.7 1003.4 1011.2 1017.1 1024.7 1026.9 1026.9 DAY 30 1 1 1 4 1 27 5 22 31 20 22 MIN. QNH PRESSURE IN HPA 1014.2 1012.2 1004.4 1005.5 998.2 994.9 994.3 996.8 1001.3 1007.3 1010.4 1012.3 994.3 DAY 19 20 24 25 28 16 4 23 2 3 17 4 MEAN QFF PRESSURE IN HPA 1020.6 1018.4 1013.9 1010.9 1004.5 998.4 996.9 1000.3 1006.2 1012.1 1018.2 1020.5 1010.1 MAX. QFF PRESSURE IN HPA 1026.1 1021.3 1019.6 1016.0 1008.7 1003.6 999.7 1003.3 1011.2 1017.2 1025.1 1027.3 1027.3 DAY 30 1 1 1 4 1 27 5 22 31 20 22 MIN. QFF PRESSURE IN HPA 1014.5 1012.5 1004.5 1005.5 998.2 994.9 994.3 996.8 1001.4 1007.4 1010.6 1012.5 994.3 DAY 19 20 24 25 28 16 4 23 2 3 17 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1016.5 1014.7 1010.1 1007.4 1001.3 995.4 993.8 997.0 1002.5 1008.2 1014.2 1016.2 1006.4 MAX. QFE PRESSURE IN HPA 1021.9 1017.0 1015.7 1011.8 1005.6 1000.8 996.3 999.8 1007.5 1013.8 1021.1 1023.6 1023.6 DAY 29 12 1 1 4 1 27 5 22 31 20 22 MIN. QFE PRESSURE IN HPA 1010.5 1008.3 1000.8 1001.1 995.4 992.1 991.4 993.5 998.1 1004.6 1005.7 1008.0 991.4 DAY 19 20 24 25 29 11 4 23 2 3 17 4 MEAN QNH PRESSURE IN HPA 1020.4 1018.6 1014.0 1011.3 1005.2 999.2 997.6 1000.8 1006.4 1012.1 1018.1 1020.1 1010.3 MAX. QNH PRESSURE IN HPA 1025.8 1020.9 1019.6 1015.7 1009.5 1004.7 1000.1 1003.7 1011.4 1017.7 1025.0 1027.5 1027.5 DAY 29 12 1 1 4 1 27 5 22 31 20 22 MIN. QNH PRESSURE IN HPA 1014.4 1012.2 1004.7 1005.0 999.2 995.9 995.2 997.3 1001.9 1008.5 1009.6 1011.9 995.2 DAY 19 20 24 25 29 11 4 23 2 3 17 4 MEAN QFF PRESSURE IN HPA 1020.8 1018.9 1014.2 1011.4 1005.2 999.2 997.6 1000.7 1006.4 1012.2 1018.3 1020.4 1010.4 MAX. QFF PRESSURE IN HPA 1026.2 1021.2 1019.8 1015.8 1009.5 1004.6 1000.1 1003.6 1011.4 1017.8 1025.3 1027.9 1027.9 DAY 29 12 1 1 4 1 27 5 22 31 20 22 MIN. QFF PRESSURE IN HPA 1014.7 1012.4 1004.8 1005.0 999.2 995.9 995.2 997.3 1001.9 1008.5 1009.7 1012.1 995.2 DAY 19 20 24 25 29 11 4 23 2 3 17 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.7 14.3 19.7 24.1 32.7 35.9 38.0 36.7 32.9 28.6 19.4 14.0 25.7 MINIMUN AIR TEMPERATURE (C) 6.8 7.7 12.1 16.7 23.4 25.2 27.6 26.2 22.9 19.8 12.1 9.0 17.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 4 25 30 31 31 26 17 1 1 166 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) 2.5 3.5 6.0 9.5 18.0 21.0 24.5 24.0 19.0 11.5 7.0 2.5 2.5 DAY 19 2 1 1 5 8 2 19 11 25 27 24 MAXIMUM AIR TEMPERATURE (C) 17.3 20.9 27.5 31.3 41.4 45.2 47.4 47.2 43.4 38.5 27.4 20.0 34.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 8 19 31 30 31 31 30 31 7 0 218 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.5 27.0 33.5 40.5 47.0 48.0 50.5 50.5 47.5 43.0 31.0 25.0 50.5 DAY 1 24 25 28 28 15 19 1 2 5 2 8 DIF. BETWEEN (MAX.-MIN.) (C) 10.5 13.2 15.4 14.6 18.0 20.0 19.8 21.0 20.5 18.7 15.3 11.0 16.5 MEAN DAILY TEMP. (MDT) (C) 12.0 14.3 19.8 24.0 32.4 35.2 37.5 36.7 33.2 29.2 19.8 14.5 25.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 16.8 100.0 353.0 426.2 511.5 485.7 365.1 252.7 23.5 3.5 2538.1 HEATING DEG. DAYS(BASE 18 0C) 184.4 106.8 13.5 0.8 0.0 0.0 0.0 0.0 0.0 0.0 12.8 118.5 436.6 DEWPOINT (MEAN C) 8.8 8.9 10.0 12.6 10.6 10.8 14.5 16.4 15.8 13.6 9.8 9.5 11.8 MIXING RATIO (G/KG) 7.19 7.20 7.84 9.34 8.28 8.37 10.82 12.21 11.74 10.33 7.82 7.66 9.07 VAPOUR PRESSURE (HPA) 11.61 11.62 12.57 14.89 13.15 13.23 17.00 19.15 18.55 16.44 12.57 12.34 14.43 SATURATION DEF. (HPA) 2.65 5.50 11.62 16.98 39.65 49.63 53.36 46.97 34.80 25.56 11.20 4.44 25.20 RELATIVE HUMIDITY (MEAN %) 84 73 58 54 29 24 27 33 40 43 57 76 50 RELATIVE HUMIDITY (MAX. %) 98 94 80 80 47 41 43 50 63 62 80 94 69 RELATIVE HUMIDITY (MIN. %) 63 49 33 31 15 13 15 20 22 27 34 52 31 RELATIVE HUMIDITY (MEAN% 03UTC) 96 91 79 75 44 38 42 48 60 57 77 90 66 RELATIVE HUMIDITY (MEAN% 09UTC) 72 57 39 35 18 15 18 24 26 30 40 60 36 RELATIVE HUMIDITY (MEAN% 15UTC) 76 63 46 42 20 16 18 23 27 36 48 72 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 88.5 28.4 36.4 108.8 0.0 0.0 0.0 0.0 0.0 0.0 10.7 42.4 315.2 DAYS WITH PRECIPITATION >=10 3 1 1 1 0 0 0 0 0 0 1 1 8 DAYS WITH PRECIPITATION >= 5 5 2 2 4 0 0 0 0 0 0 1 2 16 DAYS WITH PRECIPITATION >= 1 10 5 4 5 0 0 0 0 0 0 1 7 32 DAYS WITH PRECIPITATION 10 6 6 7 0 0 0 0 0 0 5 12 46 GREATEST DAILY PRECIPITATION 25.0 12.0 25.0 81.0 0.0 0.0 0.0 0.0 0.0 0.0 10.0 14.0 81.0 DAY 8 19 18 12 ** ** ** ** ** ** 6 1 DAY WITH THUNDER STORM 5 1 4 6 0 0 0 0 0 0 2 6 24 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 8 5 14 15 18 15 23 18 11 7 8 10 152 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 9.2 8.8 10.1 10.9 11.2 11.4 10.4 9.4 10.0 10.3 9.0 8.3 9.9 PREVAILING WIND PERCENT 24.2 22.8 16.1 20.4 29.8 29.6 35.1 33.9 21.3 19.8 22.9 28.6 25.4 CALMS PERCENT OF WIND 55.6 58.5 59.3 37.9 39.5 45.8 24.2 30.6 38.8 52.8 53.3 42.7 44.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 312 274 260 287 319 305 293 295 280 301 307 299 298 VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.8 0.9 1.0 3.9 3.5 5.2 4.6 2.2 1.9 1.4 1.3 2.3 WIND STEADINESES (MEAN %) 29.5 20.0 20.9 15.2 58.2 62.5 66.7 73.0 41.5 46.3 32.6 23.6 42.6 WIND SPEED (MEAN KNOTS) 4.4 4.0 4.3 6.6 6.7 5.6 7.8 6.3 5.3 4.1 4.3 5.5 5.4 FASTEST WIND DIRECTION 210 150 260 330 310 320 320 340 300 310 160 150 330 FASTEST WIND SPEED (KNOTS) 27 25 29 33 25 29 25 27 25 17 25 29 33 DAY 21 12 16 3 4 21 5 5 5 5 13 9 DAYS WITH SKY CLEAR (0-2)/8 16 14 17 7 21 29 31 29 29 25 17 7 242 DAYS WITH P.CLOUDY (3-6)/8 9 9 8 12 9 1 0 2 1 6 9 19 85 DAYS WITH CLOUDY (7-8)/8 6 5 6 11 1 0 0 0 0 0 4 5 38 DAYS WITH VISIBILITY =< 2 KM 15 9 0 0 0 0 1 0 2 0 1 10 38 DURATION OF SUNSHINE HOURS 196.6 189.7 212.4 206.4 333.2 355.4 364.2 337.9 300.4 251.9 202.4 158.1 3108.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.2 1016.1 1011.0 1007.3 1002.4 997.4 995.7 995.8 1002.8 1008.3 1013.9 1016.2 1007.0 MAX. QFE PRESSURE IN HPA 1024.2 1025.8 1020.0 1013.6 1008.3 1004.6 999.0 1002.8 1009.5 1014.3 1020.0 1026.3 1026.3 DAY-HOUR 26- 9 1- 9 11- 6 6- 6 16- 6 7- 6 3- 6 30- 6 21- 9 26- 6 29- 6 14- 6 MIN. QFE PRESSURE IN HPA 1007.0 1006.2 1001.9 999.0 997.4 991.4 989.9 990.5 998.0 1003.6 1006.9 1005.6 989.9 DAY-HOUR 21-12 24-21 28-12 19-21 28-15 16-15 22-15 10-15 8-15 12-15 12-12 21- 3 MEAN QNH PRESSURE IN HPA 1021.1 1020.0 1014.9 1011.2 1006.3 1001.3 999.6 999.6 1006.7 1012.2 1017.8 1020.1 1010.9 MAX. QNH PRESSURE IN HPA 1028.1 1029.7 1023.9 1017.5 1012.2 1008.5 1002.9 1006.7 1013.4 1018.2 1023.9 1030.2 1030.2 DAY-HOUR 26- 9 1- 9 11- 6 6- 6 16- 6 7- 6 3- 6 30- 6 21- 9 26- 6 29- 6 14- 6 MIN. QNH PRESSURE IN HPA 1010.9 1010.1 1005.8 1002.9 1001.2 995.2 993.7 994.3 1001.8 1007.5 1010.8 1009.5 993.7 DAY-HOUR 21-12 24-21 28-12 19-21 28-15 16-15 22-15 10-15 8-15 12-15 12-12 21- 3 MEAN QFF PRESSURE IN HPA 1021.5 1020.3 1015.1 1011.3 1006.3 1001.2 999.5 999.6 1006.7 1012.3 1018.0 1020.4 1011.0 MAX. QFF PRESSURE IN HPA 1028.5 1030.1 1024.1 1017.7 1012.2 1008.5 1002.8 1006.7 1013.4 1018.4 1024.2 1030.6 1030.6 DAY-HOUR 26- 9 1- 9 11- 6 6- 6 16- 6 7- 6 3- 6 30- 6 21- 9 26- 6 29- 6 14- 6 MIN. QFF PRESSURE IN HPA 1011.2 1010.2 1005.9 1002.9 1001.2 995.2 993.6 994.3 1001.9 1007.5 1010.9 1009.7 993.6 DAY-HOUR 21-12 24-21 28-12 19-21 28-15 16-15 22-15 10-15 8-15 13-12 12-12 21- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.0 1016.1 1010.7 1007.0 1002.3 997.3 995.6 995.5 1002.4 1007.9 1013.6 1016.1 1006.8 MAX. QFE PRESSURE IN HPA 1022.5 1024.3 1017.9 1012.9 1006.9 1003.7 997.6 1001.6 1007.3 1011.8 1017.8 1024.9 1024.9 DAY 26 1 12 1 17 7 17 30 21 27 29 14 MIN. QFE PRESSURE IN HPA 1011.6 1006.4 1003.6 1002.3 997.8 991.8 990.9 991.1 998.6 1004.1 1007.5 1007.4 990.9 DAY 12 25 26 30 21 17 23 14 10 13 13 21 MEAN QNH PRESSURE IN HPA 1020.9 1020.0 1014.6 1010.9 1006.1 1001.2 999.5 999.3 1006.3 1011.8 1017.5 1020.0 1010.7 MAX. QNH PRESSURE IN HPA 1026.4 1028.2 1021.8 1016.8 1010.8 1007.6 1001.4 1005.5 1011.2 1015.7 1021.7 1028.8 1028.8 DAY 26 1 12 1 17 7 17 30 21 27 29 14 MIN. QNH PRESSURE IN HPA 1015.5 1010.3 1007.5 1006.2 1001.6 995.6 994.7 994.9 1002.4 1008.0 1011.4 1011.3 994.7 DAY 12 25 26 30 21 17 23 14 10 13 13 21 MEAN QFF PRESSURE IN HPA 1021.2 1020.2 1014.8 1011.0 1006.2 1001.2 999.4 999.2 1006.3 1011.9 1017.7 1020.3 1010.8 MAX. QFF PRESSURE IN HPA 1026.8 1028.6 1022.0 1017.0 1010.8 1007.6 1001.4 1005.4 1011.2 1015.8 1022.0 1029.2 1029.2 DAY 26 1 12 1 17 7 17 30 21 27 29 14 MIN. QFF PRESSURE IN HPA 1015.8 1010.4 1007.6 1006.2 1001.6 995.6 994.7 994.9 1002.4 1008.0 1011.5 1011.5 994.7 DAY 12 25 28 30 29 17 23 14 10 13 13 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.8 1016.1 1011.0 1007.3 1002.5 997.9 996.0 996.2 1003.1 1008.5 1014.0 1016.1 1007.1 MAX. QFE PRESSURE IN HPA 1022.3 1024.6 1018.1 1012.3 1007.5 1004.2 998.3 1001.5 1008.0 1012.2 1018.6 1025.6 1025.6 DAY 26 1 12 1 17 7 1 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 1010.4 1006.5 1003.3 1000.5 998.6 993.5 991.3 992.0 999.1 1004.6 1007.3 1005.6 991.3 DAY 21 25 26 3 21 17 23 14 6 13 13 21 MEAN QNH PRESSURE IN HPA 1020.7 1020.0 1014.9 1011.2 1006.4 1001.7 999.9 1000.0 1007.0 1012.4 1017.9 1020.0 1011.0 MAX. QNH PRESSURE IN HPA 1026.2 1028.5 1022.0 1016.2 1011.4 1008.1 1002.1 1005.4 1011.9 1016.1 1022.5 1029.5 1029.5 DAY 26 1 12 1 17 7 1 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1014.3 1010.4 1007.2 1004.4 1002.4 997.3 995.1 995.8 1003.0 1008.5 1011.2 1009.5 995.1 DAY 21 25 26 3 21 17 23 14 6 13 13 21 MEAN QFF PRESSURE IN HPA 1021.1 1020.3 1015.2 1011.4 1006.5 1001.7 999.8 1000.0 1007.0 1012.5 1018.1 1020.3 1011.2 MAX. QFF PRESSURE IN HPA 1026.6 1028.9 1022.2 1016.4 1011.5 1008.1 1002.1 1005.3 1011.9 1016.3 1022.8 1029.9 1029.9 DAY 26 1 12 1 17 7 1 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1014.6 1010.6 1007.3 1004.5 1002.5 997.3 995.1 995.8 1003.0 1008.6 1011.3 1009.7 995.1 DAY 21 25 26 3 21 17 23 14 6 13 13 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1018.3 1017.5 1012.5 1008.6 1003.6 998.5 996.8 997.1 1004.2 1010.0 1015.4 1017.5 1008.3 MAX. QFE PRESSURE IN HPA 1024.1 1025.6 1020.0 1013.6 1008.3 1004.6 999.0 1002.8 1009.0 1014.3 1020.0 1026.3 1026.3 DAY 26 1 11 6 16 7 3 30 21 26 29 14 MIN. QFE PRESSURE IN HPA 1010.0 1009.0 1004.0 1002.5 999.7 993.6 993.1 993.0 1000.3 1006.0 1008.7 1006.7 993.0 DAY 11 25 28 3 28 17 23 14 6 14 13 21 MEAN QNH PRESSURE IN HPA 1022.2 1021.4 1016.4 1012.4 1007.5 1002.4 1000.6 1000.9 1008.0 1013.9 1019.3 1021.4 1012.2 MAX. QNH PRESSURE IN HPA 1028.0 1029.5 1023.9 1017.5 1012.2 1008.5 1002.9 1006.7 1012.9 1018.2 1023.9 1030.2 1030.2 DAY 26 1 11 6 16 7 3 30 21 26 29 14 MIN. QNH PRESSURE IN HPA 1013.9 1012.9 1007.9 1006.4 1003.6 997.4 996.9 996.8 1004.2 1009.9 1012.6 1010.6 996.8 DAY 11 25 28 3 28 17 23 14 6 14 13 21 MEAN QFF PRESSURE IN HPA 1022.6 1021.7 1016.6 1012.6 1007.5 1002.4 1000.5 1000.9 1008.1 1014.0 1019.5 1021.7 1012.3 MAX. QFF PRESSURE IN HPA 1028.4 1029.9 1024.1 1017.7 1012.2 1008.5 1002.8 1006.7 1012.9 1018.4 1024.2 1030.6 1030.6 DAY 26 1 11 6 16 7 3 30 21 26 29 14 MIN. QFF PRESSURE IN HPA 1014.2 1013.1 1008.0 1006.6 1003.5 997.4 996.8 996.8 1004.2 1009.9 1012.7 1010.8 996.8 DAY 11 25 28 3 28 17 23 14 6 14 13 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1017.1 1011.9 1008.3 1003.2 998.1 996.4 996.5 1003.6 1008.9 1014.4 1016.6 1007.7 MAX. QFE PRESSURE IN HPA 1024.2 1025.8 1019.0 1012.6 1007.5 1003.9 998.7 1002.5 1009.5 1013.5 1018.7 1024.6 1025.8 DAY 26 1 11 6 16 7 3 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 1009.1 1009.1 1002.7 1001.7 999.2 993.3 992.6 992.4 1000.0 1005.0 1008.1 1006.1 992.4 DAY 21 25 28 19 20 17 22 7 10 14 6 21 MEAN QNH PRESSURE IN HPA 1021.8 1021.0 1015.8 1012.2 1007.1 1002.0 1000.2 1000.4 1007.4 1012.8 1018.3 1020.5 1011.6 MAX. QNH PRESSURE IN HPA 1028.1 1029.7 1022.9 1016.5 1011.4 1007.8 1002.6 1006.4 1013.4 1017.4 1022.6 1028.5 1029.7 DAY 26 1 11 6 16 7 3 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1013.0 1013.0 1006.6 1005.6 1003.1 997.1 996.4 996.2 1003.9 1008.9 1012.0 1010.0 996.2 DAY 21 25 28 19 20 17 22 7 10 14 6 21 MEAN QFF PRESSURE IN HPA 1022.1 1021.3 1016.0 1012.3 1007.1 1002.0 1000.2 1000.3 1007.4 1012.8 1018.5 1020.8 1011.7 MAX. QFF PRESSURE IN HPA 1028.5 1030.1 1023.1 1016.7 1011.4 1007.8 1002.5 1006.3 1013.4 1017.5 1022.8 1028.9 1030.1 DAY 26 1 11 6 16 7 3 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1013.3 1013.1 1006.7 1005.6 1003.0 997.1 996.3 996.2 1003.9 1008.9 1012.1 1010.2 996.2 DAY 21 25 28 19 20 17 22 7 10 14 6 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.5 1015.3 1010.2 1007.0 1001.7 996.6 994.9 994.9 1001.8 1007.3 1012.9 1015.2 1006.2 MAX. QFE PRESSURE IN HPA 1022.6 1024.0 1017.0 1012.6 1006.3 1002.0 997.4 1000.8 1007.5 1011.9 1016.5 1023.2 1024.0 DAY 24 1 11 1 16 6 16 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 1007.0 1008.4 1001.9 1001.8 997.8 991.7 990.9 990.9 998.2 1003.6 1006.9 1005.7 990.9 DAY 21 25 28 18 28 17 22 14 7 13 12 21 MEAN QNH PRESSURE IN HPA 1020.4 1019.2 1014.1 1010.9 1005.6 1000.5 998.8 998.8 1005.6 1011.1 1016.8 1019.1 1010.1 MAX. QNH PRESSURE IN HPA 1026.5 1027.9 1020.9 1016.5 1010.2 1005.9 1001.2 1004.7 1011.4 1015.8 1020.4 1027.1 1027.9 DAY 24 1 11 1 16 6 16 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1010.9 1012.3 1005.8 1005.7 1001.6 995.5 994.7 994.7 1002.0 1007.5 1010.8 1009.6 994.7 DAY 21 25 28 18 28 17 22 14 7 13 12 21 MEAN QFF PRESSURE IN HPA 1020.7 1019.5 1014.3 1011.0 1005.6 1000.5 998.7 998.7 1005.6 1011.2 1017.0 1019.3 1010.2 MAX. QFF PRESSURE IN HPA 1026.9 1028.3 1021.1 1016.7 1010.2 1005.8 1001.2 1004.6 1011.4 1015.9 1020.7 1027.5 1028.3 DAY 24 1 11 1 16 6 16 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1011.2 1012.4 1005.9 1005.7 1001.6 995.5 994.7 994.6 1002.0 1007.5 1010.9 1009.8 994.6 DAY 21 25 28 18 28 17 22 14 7 13 12 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.7 1015.1 1010.1 1006.4 1001.1 996.1 994.4 994.5 1001.7 1007.4 1013.1 1015.5 1006.0 MAX. QFE PRESSURE IN HPA 1022.6 1024.4 1017.0 1011.7 1005.5 1001.9 997.0 1001.0 1006.8 1012.3 1016.7 1022.6 1024.4 DAY 24 1 11 1 16 3 16 29 21 26 28 14 MIN. QFE PRESSURE IN HPA 1007.8 1007.7 1002.7 999.8 997.4 991.4 989.9 990.5 998.0 1003.6 1006.9 1007.8 989.9 DAY 11 24 28 19 28 16 22 10 8 12 12 21 MEAN QNH PRESSURE IN HPA 1020.6 1019.0 1013.9 1010.2 1005.0 999.9 998.2 998.3 1005.6 1011.3 1017.0 1019.4 1009.9 MAX. QNH PRESSURE IN HPA 1026.5 1028.3 1020.9 1015.6 1009.4 1005.8 1000.8 1004.9 1010.7 1016.2 1020.6 1026.5 1028.3 DAY 24 1 11 1 16 3 16 29 21 26 28 14 MIN. QNH PRESSURE IN HPA 1011.7 1011.6 1006.6 1003.7 1001.2 995.2 993.7 994.3 1001.8 1007.5 1010.8 1011.7 993.7 DAY 11 24 28 19 28 16 22 10 8 12 12 21 MEAN QFF PRESSURE IN HPA 1021.0 1019.3 1014.2 1010.4 1005.0 999.9 998.2 998.3 1005.6 1011.4 1017.2 1019.7 1010.0 MAX. QFF PRESSURE IN HPA 1026.9 1028.7 1021.1 1015.8 1009.4 1005.8 1000.8 1004.9 1010.7 1016.4 1020.9 1026.9 1028.7 DAY 24 1 11 1 16 3 16 29 21 26 28 14 MIN. QFF PRESSURE IN HPA 1012.0 1011.8 1006.7 1003.8 1001.2 995.2 993.6 994.3 1001.9 1007.6 1011.0 1011.9 993.6 DAY 11 24 28 19 28 16 22 10 8 13 12 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1016.0 1010.8 1007.1 1002.2 997.1 995.6 995.7 1003.0 1008.4 1013.9 1016.3 1007.0 MAX. QFE PRESSURE IN HPA 1023.7 1024.9 1018.4 1012.5 1006.5 1003.0 997.9 1002.0 1008.3 1012.7 1017.9 1024.0 1024.9 DAY 31 1 11 23 16 3 16 29 20 26 18 13 MIN. QFE PRESSURE IN HPA 1008.2 1008.0 1003.5 1001.8 998.4 992.2 991.5 991.5 999.3 1004.1 1007.1 1009.6 991.5 DAY 11 24 26 18 19 16 22 13 8 12 12 10 MEAN QNH PRESSURE IN HPA 1021.4 1019.9 1014.7 1010.9 1006.0 1001.0 999.5 999.5 1006.8 1012.2 1017.8 1020.2 1010.8 MAX. QNH PRESSURE IN HPA 1027.6 1028.8 1022.3 1016.4 1010.4 1006.9 1001.7 1005.9 1012.2 1016.6 1021.8 1027.9 1028.8 DAY 31 1 11 23 16 3 16 29 20 26 18 13 MIN. QNH PRESSURE IN HPA 1012.1 1011.9 1007.4 1005.7 1002.2 996.0 995.3 995.3 1003.2 1008.0 1011.0 1013.5 995.3 DAY 11 24 26 18 19 16 22 13 8 12 12 10 MEAN QFF PRESSURE IN HPA 1021.8 1020.2 1014.9 1011.1 1006.0 1000.9 999.4 999.5 1006.9 1012.3 1018.0 1020.5 1011.0 MAX. QFF PRESSURE IN HPA 1028.0 1029.2 1022.5 1016.6 1010.4 1006.9 1001.7 1005.9 1012.2 1016.8 1022.0 1028.2 1029.2 DAY 31 1 11 23 16 3 16 29 20 26 18 13 MIN. QFF PRESSURE IN HPA 1012.4 1012.1 1007.5 1005.7 1002.2 996.0 995.3 995.3 1003.2 1008.0 1011.1 1013.7 995.3 DAY 11 24 26 18 19 16 22 13 8 12 12 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1016.0 1011.1 1006.9 1002.7 997.8 996.2 996.0 1003.2 1008.5 1013.9 1016.3 1007.2 MAX. QFE PRESSURE IN HPA 1023.7 1024.5 1019.0 1012.5 1006.9 1004.0 998.4 1001.7 1008.3 1012.1 1017.9 1024.7 1024.7 DAY 31 1 11 23 16 3 5 29 20 26 18 13 MIN. QFE PRESSURE IN HPA 1009.8 1006.2 1004.5 999.0 998.4 992.5 991.4 992.3 999.6 1004.3 1007.8 1009.3 991.4 DAY 11 24 26 19 28 16 22 13 9 12 12 20 MEAN QNH PRESSURE IN HPA 1021.3 1019.9 1015.0 1010.7 1006.6 1001.6 1000.1 999.9 1007.1 1012.3 1017.8 1020.2 1011.0 MAX. QNH PRESSURE IN HPA 1027.6 1028.4 1022.9 1016.4 1010.8 1007.9 1002.2 1005.6 1012.2 1016.0 1021.8 1028.6 1028.6 DAY 31 1 11 23 16 3 5 29 20 26 18 13 MIN. QNH PRESSURE IN HPA 1013.7 1010.1 1008.4 1002.9 1002.2 996.3 995.2 996.1 1003.5 1008.2 1011.7 1013.2 995.2 DAY 11 24 26 19 28 16 22 13 9 12 12 20 MEAN QFF PRESSURE IN HPA 1021.6 1020.2 1015.2 1010.9 1006.6 1001.6 1000.0 999.8 1007.1 1012.4 1017.9 1020.5 1011.1 MAX. QFF PRESSURE IN HPA 1028.0 1028.8 1023.1 1016.6 1010.8 1007.9 1002.2 1005.6 1012.2 1016.1 1022.0 1028.9 1028.9 DAY 31 1 11 23 16 3 5 29 20 26 18 13 MIN. QFF PRESSURE IN HPA 1014.0 1010.2 1008.5 1002.9 1002.2 996.3 995.1 996.1 1003.5 1008.2 1011.8 1013.4 995.1 DAY 11 24 26 19 28 16 22 13 9 12 12 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.8 15.4 19.1 26.8 32.2 36.6 37.8 37.1 32.8 28.2 19.1 14.5 26.0 MINIMUN AIR TEMPERATURE (C) 7.7 8.9 11.6 19.0 22.9 26.3 27.9 28.0 22.4 19.8 11.4 10.1 18.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 12 24 30 31 31 22 8 1 0 159 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) 3.0 3.0 4.0 12.0 14.0 24.0 25.0 23.5 17.0 15.5 4.0 4.0 3.0 DAY 18 7 1 3 1 8 1 30 22 23 18 22 MAXIMUM AIR TEMPERATURE (C) 18.8 22.1 26.9 34.7 40.8 46.3 46.9 46.7 43.4 37.8 27.6 20.2 34.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 5 29 31 30 31 31 30 30 11 0 228 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 27.5 33.0 40.5 45.0 48.5 49.0 49.5 48.0 42.0 33.5 25.0 49.5 DAY 9 24 12 9 18 15 10 10 3 2 8 18 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 13.2 15.3 15.7 17.9 20.0 19.0 18.7 21.0 18.0 16.2 10.1 16.3 MEAN DAILY TEMP. (MDT) (C) 13.2 15.5 19.2 26.8 31.8 36.3 37.4 37.3 32.9 28.8 19.5 15.1 26.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 18.3 175.4 336.2 458.0 507.7 506.2 356.7 240.7 25.5 0.0 2624.9 HEATING DEG. DAYS(BASE 18 0C) 147.6 73.8 25.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28.3 94.5 369.0 DEWPOINT (MEAN C) 9.0 7.6 8.0 11.4 12.4 13.8 15.0 19.9 14.5 14.0 7.7 11.4 12.1 MIXING RATIO (G/KG) 7.21 6.65 6.95 8.66 9.30 10.31 11.32 15.61 10.76 10.40 6.92 8.50 9.38 VAPOUR PRESSURE (HPA) 11.65 10.70 11.16 13.83 14.78 16.23 17.72 24.32 17.01 16.56 11.14 13.70 14.90 SATURATION DEF. (HPA) 3.61 7.50 12.20 23.29 36.40 49.24 51.50 42.35 36.31 24.24 12.66 3.36 25.22 RELATIVE HUMIDITY (MEAN %) 80 63 52 42 33 28 29 41 36 44 50 83 48 RELATIVE HUMIDITY (MAX. %) 95 85 76 63 49 41 45 64 55 63 68 94 67 RELATIVE HUMIDITY (MIN. %) 58 38 31 24 19 17 17 21 21 27 32 66 31 RELATIVE HUMIDITY (MEAN% 03UTC) 92 81 70 59 46 37 42 60 52 58 63 92 63 RELATIVE HUMIDITY (MEAN% 09UTC) 65 44 36 28 22 20 19 28 25 30 35 72 35 RELATIVE HUMIDITY (MEAN% 15UTC) 74 54 42 32 25 20 20 27 27 39 46 81 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 81.4 16.4 28.7 5.2 0.0 0.0 0.0 0.0 0.0 0.0 2.2 73.4 207.3 DAYS WITH PRECIPITATION >=10 3 0 1 0 0 0 0 0 0 0 0 3 7 DAYS WITH PRECIPITATION >= 5 4 2 1 0 0 0 0 0 0 0 0 4 11 DAYS WITH PRECIPITATION >= 1 5 4 3 4 0 0 0 0 0 0 1 7 24 DAYS WITH PRECIPITATION 6 6 6 8 0 0 0 0 0 0 2 9 37 GREATEST DAILY PRECIPITATION 27.0 6.4 20.4 1.3 0.0 0.0 0.0 0.0 0.0 0.0 2.0 31.0 31.0 DAY 4 4 26 20 ** ** ** ** ** ** 29 28 DAY WITH THUNDER STORM 3 2 4 9 0 0 0 0 0 0 1 4 23 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 8 17 22 25 24 27 30 18 15 19 17 13 235 WIND DIRECTION (PREVAILING) 315 315 315 315 315 315 315 180 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.6 9.7 10.0 11.9 10.3 12.0 12.7 10.0 10.7 10.3 9.8 9.8 10.8 PREVAILING WIND PERCENT 17.3 29.9 30.2 29.2 35.5 46.7 44.8 17.7 25.0 16.9 21.7 28.6 27.8 CALMS PERCENT OF WIND 57.7 37.1 20.2 23.3 31.0 29.2 17.3 33.9 50.4 49.6 52.5 42.3 37.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 272 296 289 255 302 306 298 204 297 231 295 296 290 VECTOR WIND MAGNITUDE(KNOTS) 0.2 1.7 1.6 1.4 4.9 6.9 8.1 3.0 3.4 1.3 1.6 2.2 2.7 WIND STEADINESES (MEAN %) 5.3 25.8 18.8 14.6 67.1 82.1 82.7 50.0 69.4 25.5 34.0 40.0 40.3 WIND SPEED (MEAN KNOTS) 3.8 6.6 8.5 9.6 7.3 8.4 9.8 6.0 4.9 5.1 4.7 5.5 6.7 FASTEST WIND DIRECTION 320 180 150 150 360 300 300 280 310 150 180 140 150 FASTEST WIND SPEED (KNOTS) 23 33 39 35 35 29 29 25 31 31 25 27 39 DAY 30 20 25 7 8 6 2 16 19 29 11 27 DAYS WITH SKY CLEAR (0-2)/8 13 13 12 9 16 24 31 31 30 25 14 15 233 DAYS WITH P.CLOUDY (3-6)/8 10 10 8 9 13 5 0 0 0 6 12 11 84 DAYS WITH CLOUDY (7-8)/8 8 5 11 12 2 1 0 0 0 0 4 5 48 DAYS WITH VISIBILITY =< 2 KM 12 1 9 5 11 3 2 4 0 4 2 15 68 DURATION OF SUNSHINE HOURS 167.2 171.0 190.3 196.5 285.8 330.5 358.4 353.2 318.9 267.1 206.9 154.8 3000.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1016.6 1012.8 1011.2 1007.5 1004.2 996.6 993.5 996.1 1001.6 1008.7 1014.4 1017.2 1006.7 MAX. QFE PRESSURE IN HPA 1024.2 1021.4 1021.7 1014.4 1011.2 1005.4 999.2 1001.1 1007.7 1015.6 1022.0 1025.0 1025.0 DAY-HOUR 6- 6 6- 6 2- 6 29- 6 10- 9 1-18 3- 6 29- 6 27- 6 31- 6 25- 6 30- 6 MIN. QFE PRESSURE IN HPA 1003.1 1002.3 998.1 999.6 996.8 989.1 990.3 992.0 994.9 1002.8 1007.2 1006.2 989.1 DAY-HOUR 28-12 19- 3 12-12 27-12 28-15 30-15 25-15 20-15 3-15 1-15 8-15 6- 3 MEAN QNH PRESSURE IN HPA 1020.5 1016.7 1015.1 1011.4 1008.1 1000.4 997.3 1000.0 1005.5 1012.6 1018.2 1021.1 1010.6 MAX. QNH PRESSURE IN HPA 1028.1 1025.3 1025.6 1018.3 1015.1 1009.3 1003.1 1005.0 1011.6 1019.5 1025.9 1028.9 1028.9 DAY-HOUR 6- 6 6- 6 2- 6 29- 6 10- 9 1-18 3- 6 29- 6 27- 6 31- 6 25- 6 30- 6 MIN. QNH PRESSURE IN HPA 1007.0 1006.2 1001.9 1003.5 1000.6 992.9 994.1 995.8 998.7 1006.7 1011.1 1010.1 992.9 DAY-HOUR 28-12 19- 3 12-12 27-12 28-15 30-15 25-15 20-15 3-15 1-15 8-15 6- 3 MEAN QFF PRESSURE IN HPA 1020.8 1017.0 1015.3 1011.5 1008.1 1000.4 997.3 999.9 1005.5 1012.7 1018.5 1021.3 1010.7 MAX. QFF PRESSURE IN HPA 1028.5 1025.7 1026.0 1018.4 1015.2 1009.3 1003.0 1005.0 1011.6 1019.7 1026.2 1029.3 1029.3 DAY-HOUR 6- 6 6- 6 2- 6 29- 6 10- 9 1-18 3- 6 29- 6 27- 6 31- 6 25- 6 30- 6 MIN. QFF PRESSURE IN HPA 1007.2 1006.4 1002.1 1003.5 1000.7 992.9 994.1 995.8 998.7 1006.7 1011.3 1010.3 992.9 DAY-HOUR 28-12 19- 3 12-12 27-12 28-15 30-15 25-15 20-15 3-15 1-15 8-15 6- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.2 1012.6 1011.2 1007.1 1003.8 996.5 993.3 996.0 1001.4 1008.3 1014.0 1016.9 1006.4 MAX. QFE PRESSURE IN HPA 1022.8 1019.5 1020.7 1013.0 1010.1 1003.5 997.1 998.9 1005.6 1014.4 1018.9 1023.0 1023.0 DAY 7 6 2 2 1 1 3 29 27 31 25 30 MIN. QFE PRESSURE IN HPA 1007.5 1004.3 1003.0 1001.4 999.1 991.0 990.9 993.2 996.5 1003.1 1007.4 1007.2 990.9 DAY 28 19 26 22 29 30 1 21 4 1 9 6 MEAN QNH PRESSURE IN HPA 1020.1 1016.5 1015.1 1011.0 1007.7 1000.4 997.2 999.8 1005.2 1012.2 1017.9 1020.8 1010.3 MAX. QNH PRESSURE IN HPA 1026.7 1023.4 1024.6 1016.9 1014.0 1007.4 1000.9 1002.8 1009.5 1018.3 1022.8 1026.9 1026.9 DAY 7 6 2 2 1 1 3 29 27 31 25 30 MIN. QNH PRESSURE IN HPA 1011.4 1008.2 1006.9 1005.3 1003.0 994.8 994.7 997.0 1000.3 1007.0 1011.3 1011.1 994.7 DAY 28 19 26 22 29 30 1 21 4 1 9 6 MEAN QFF PRESSURE IN HPA 1020.4 1016.7 1015.3 1011.1 1007.7 1000.3 997.1 999.7 1005.2 1012.2 1018.1 1021.0 1010.4 MAX. QFF PRESSURE IN HPA 1027.0 1023.7 1024.9 1017.1 1014.1 1007.3 1000.9 1002.7 1009.5 1018.4 1023.0 1027.3 1027.3 DAY 7 6 2 2 1 1 3 29 27 31 25 30 MIN. QFF PRESSURE IN HPA 1011.6 1008.4 1007.0 1005.3 1002.9 994.8 994.7 997.0 1000.3 1007.0 1011.4 1011.3 994.7 DAY 28 19 26 22 29 30 1 21 4 1 9 6 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.3 1012.5 1011.2 1007.6 1004.6 997.1 994.0 996.8 1002.0 1008.9 1014.4 1017.0 1006.9 MAX. QFE PRESSURE IN HPA 1022.3 1020.0 1020.7 1013.5 1010.2 1004.1 998.3 1000.1 1006.6 1014.0 1020.4 1023.0 1023.0 DAY 7 6 2 30 1 2 3 29 27 31 25 30 MIN. QFE PRESSURE IN HPA 1006.8 1002.3 999.4 1002.9 1000.0 991.6 991.6 993.8 997.0 1004.3 1008.0 1006.2 991.6 DAY 28 19 26 20 28 30 7 21 4 1 9 6 MEAN QNH PRESSURE IN HPA 1020.2 1016.4 1015.1 1011.5 1008.5 1000.9 997.8 1000.6 1005.8 1012.8 1018.3 1020.9 1010.7 MAX. QNH PRESSURE IN HPA 1026.2 1023.9 1024.6 1017.4 1014.1 1008.0 1002.1 1004.0 1010.5 1017.9 1024.3 1026.9 1026.9 DAY 7 6 2 30 1 2 3 29 27 31 25 30 MIN. QNH PRESSURE IN HPA 1010.7 1006.2 1003.3 1006.8 1003.9 995.4 995.4 997.6 1000.8 1008.2 1011.9 1010.1 995.4 DAY 28 19 26 20 28 30 7 21 4 1 9 6 MEAN QFF PRESSURE IN HPA 1020.5 1016.7 1015.4 1011.6 1008.5 1000.9 997.8 1000.6 1005.9 1012.9 1018.5 1021.2 1010.9 MAX. QFF PRESSURE IN HPA 1026.6 1024.2 1025.0 1017.6 1014.2 1008.0 1002.1 1004.0 1010.5 1018.0 1024.6 1027.3 1027.3 DAY 7 6 2 30 1 2 3 29 27 31 25 30 MIN. QFF PRESSURE IN HPA 1010.9 1006.4 1003.4 1006.8 1003.9 995.4 995.4 997.6 1000.8 1008.2 1012.1 1010.3 995.4 DAY 28 19 26 20 28 30 7 21 4 1 9 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION OMIDIYEH (PAYGAH) (40830) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 46 N LONGITUDE 49 39 E DATA PROCESSING CENTER ELEVATION 34.9 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 1017.9 1014.0 1012.4 1008.9 1005.7 997.9 994.7 997.5 1003.1 1010.3 1015.9 1018.5 1008.1 MAX. QFE PRESSURE IN HPA 1024.2 1021.4 1021.7 1014.4 1010.9 1004.9 999.2 1001.1 1007.7 1015.6 1022.0 1025.0 1025.0 DAY 6 6 2 29 1 2 3 29 27 31 25 30 MIN. QFE PRESSURE IN HPA 1006.1 1003.8 1001.5 1003.1 1000.8 992.0 992.4 994.7 998.6 1005.8 1009.6 1008.2 992.0 DAY 28 20 12 20 28 30 1 21 1 1 9 6 MEAN QNH PRESSURE IN HPA 1021.8 1017.9 1016.3 1012.8 1009.5 1001.8 998.5 1001.3 1007.0 1014.2 1019.8 1022.4 1011.9 MAX. QNH PRESSURE IN HPA 1028.1 1025.3 1025.6 1018.3 1014.8 1008.8 1003.1 1005.0 1011.6 1019.5 1025.9 1028.9 1028.9 DAY 6 6 2 29 1 2 3 29 27 31 25 30 MIN. QNH PRESSURE IN HPA 1010.0 1007.7 1005.4 1007.0 1004.7 995.8 996.2 998.5 1002.4 1009.7 1013.5 1012.1 995.8 DAY 28 20 12 20 28 30 1 21 1 1 9 6 MEAN QFF PRESSURE IN HPA 1022.1 1018.2 1016.6 1012.9 1009.6 1001.7 998.5 1001.3 1007.0 1014.3 1020.0 1022.7 1012.1 MAX. QFF PRESSURE IN HPA 1028.5 1025.7 1026.0 1018.4 1014.9 1008.7 1003.0 1005.0 1011.6 1019.7 1026.2 1029.3 1029.3 DAY 6 6 2 29 1 2 3 29 27 31 25 30 MIN. QFF PRESSURE IN HPA 1010.2 1007.9 1005.5 1007.0 1004.6 995.8 996.2 998.5 1002.4 1009.7 1013.6 1012.3 995.8 DAY 28 20 12 20 28 30 1 21 1 1 9 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.2 1013.5 1012.0 1008.5 1005.0 997.2 994.3 996.8 1002.4 1009.3 1015.0 1017.6 1007.4 MAX. QFE PRESSURE IN HPA 1023.3 1021.2 1021.4 1014.0 1011.2 1004.8 998.8 1001.0 1007.7 1015.3 1020.8 1023.6 1023.6 DAY 6 6 2 29 10 1 3 29 27 31 25 30 MIN. QFE PRESSURE IN HPA 1004.7 1003.8 998.5 1001.4 999.1 991.4 992.2 994.3 997.3 1004.9 1009.0 1007.9 991.4 DAY 28 20 12 27 28 30 26 21 3 1 8 6 MEAN QNH PRESSURE IN HPA 1021.2 1017.4 1015.9 1012.4 1008.9 1001.1 998.1 1000.6 1006.3 1013.2 1018.9 1021.5 1011.3 MAX. QNH PRESSURE IN HPA 1027.2 1025.1 1025.3 1017.9 1015.1 1008.7 1002.7 1004.9 1011.6 1019.2 1024.7 1027.5 1027.5 DAY 6 6 2 29 10 1 3 29 27 31 25 30 MIN. QNH PRESSURE IN HPA 1008.6 1007.7 1002.3 1005.3 1003.0 995.2 996.0 998.1 1001.1 1008.8 1012.9 1011.8 995.2 DAY 28 20 12 27 28 30 26 21 3 1 8 6 MEAN QFF PRESSURE IN HPA 1021.5 1017.6 1016.1 1012.4 1008.9 1001.0 998.0 1000.6 1006.3 1013.2 1019.1 1021.7 1011.4 MAX. QFF PRESSURE IN HPA 1027.5 1025.4 1025.6 1018.0 1015.2 1008.7 1002.6 1004.8 1011.6 1019.3 1024.9 1027.9 1027.9 DAY 6 6 2 29 10 1 3 29 27 31 25 30 MIN. QFF PRESSURE IN HPA 1008.8 1007.9 1002.5 1005.3 1002.9 995.2 996.0 998.1 1001.1 1008.8 1013.0 1012.0 995.2 DAY 28 20 12 27 28 30 26 21 3 1 9 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.8 1011.9 1010.3 1006.7 1003.5 995.8 992.8 995.2 1000.6 1007.7 1013.5 1016.1 1005.8 MAX. QFE PRESSURE IN HPA 1022.2 1019.1 1019.0 1012.0 1008.7 1004.4 997.4 999.3 1005.3 1014.6 1019.6 1022.2 1022.2 DAY 6 6 2 23 10 2 3 29 27 31 25 30 MIN. QFE PRESSURE IN HPA 1003.1 1003.2 998.1 999.6 996.9 989.6 990.8 992.5 995.1 1003.2 1007.4 1008.4 989.6 DAY 28 20 12 27 28 30 7 20 3 1 8 6 MEAN QNH PRESSURE IN HPA 1019.7 1015.8 1014.2 1010.6 1007.3 999.7 996.7 999.0 1004.5 1011.5 1017.4 1020.0 1009.7 MAX. QNH PRESSURE IN HPA 1026.1 1023.0 1022.9 1015.9 1012.6 1008.3 1001.2 1003.2 1009.2 1018.5 1023.5 1026.1 1026.1 DAY 6 6 2 23 10 2 3 29 27 31 25 30 MIN. QNH PRESSURE IN HPA 1007.0 1007.1 1001.9 1003.5 1000.7 993.4 994.6 996.3 998.9 1007.1 1011.3 1012.3 993.4 DAY 28 20 12 27 28 30 7 20 3 1 8 6 MEAN QFF PRESSURE IN HPA 1020.0 1016.0 1014.4 1010.7 1007.4 999.6 996.6 998.9 1004.5 1011.6 1017.6 1020.3 1009.8 MAX. QFF PRESSURE IN HPA 1026.4 1023.3 1023.2 1016.