STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.1 10.3 13.1 19.1 25.4 29.2 30.4 30.2 27.0 19.2 16.6 9.7 20.0 MINIMUN AIR TEMPERATURE (C) 4.3 4.0 5.7 11.6 15.0 19.6 24.0 24.5 18.8 11.5 7.9 3.3 12.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 9 28 31 14 1 0 0 83 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 2 1 0 0 0 0 0 0 0 0 5 9 TEMPERATURE RECORDS LOWEST(C) 0.0 -0.6 0.0 4.0 11.2 12.5 19.6 21.2 11.4 3.6 1.6 -0.4 -0.6 DAY 31 27 7 8 26 24 25 28 28 18 29 19 MAXIMUM AIR TEMPERATURE (C) 14.1 14.1 17.4 23.6 30.1 34.1 34.2 34.4 32.0 24.1 23.0 14.2 24.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 7 17 26 30 31 22 3 3 0 140 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.8 26.6 30.8 36.6 36.0 45.4 37.6 38.5 37.8 37.6 33.8 22.5 45.4 DAY 29 8 25 3 21 29 15 12 17 3 10 28 DIF. BETWEEN (MAX.-MIN.) (C) 9.8 10.1 11.7 12.0 15.1 14.5 10.2 9.9 13.2 12.6 15.1 10.9 12.1 MEAN DAILY TEMP. (MDT) (C) 9.2 9.0 11.5 17.6 22.6 26.9 29.1 29.5 25.4 17.8 15.4 8.7 18.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 10.6 57.6 176.8 251.0 262.6 140.3 13.5 4.8 0.0 917.3 HEATING DEG. DAYS(BASE 18 0C) 257.2 250.9 186.1 51.9 0.0 0.0 0.0 0.0 0.0 52.0 101.7 287.4 1187.2 DEWPOINT (MEAN C) 5.0 4.2 7.1 12.2 14.0 16.7 21.0 21.9 17.2 11.6 8.2 4.2 11.9 MIXING RATIO (G/KG) 5.44 5.20 6.42 9.02 10.22 12.20 16.00 16.77 12.70 8.82 7.04 5.19 9.59 VAPOUR PRESSURE (HPA) 8.80 8.42 10.33 14.40 16.31 19.30 25.10 26.34 20.12 14.17 11.30 8.41 15.25 SATURATION DEF. (HPA) 4.21 4.58 5.60 9.27 17.45 22.73 18.95 17.34 17.22 9.38 9.28 4.18 11.68 RELATIVE HUMIDITY (MEAN %) 74 69 71 69 53 50 60 63 59 65 63 72 64 RELATIVE HUMIDITY (MAX. %) 88 88 88 87 77 71 81 83 85 90 86 86 84 RELATIVE HUMIDITY (MIN. %) 60 54 55 55 40 38 46 49 43 48 43 57 49 RELATIVE HUMIDITY (MEAN% 03UTC) 87 87 87 84 77 71 80 83 84 89 82 83 83 RELATIVE HUMIDITY (MEAN% 09UTC) 64 60 64 58 44 42 52 53 48 52 49 60 54 RELATIVE HUMIDITY (MEAN% 15UTC) 76 71 71 75 48 47 53 60 57 70 71 79 65 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 19.9 28.0 44.5 80.4 0.7 20.0 1.0 5.6 22.3 47.6 55.0 28.4 353.4 DAYS WITH PRECIPITATION >=10 0 1 2 3 0 1 0 0 1 3 3 0 14 DAYS WITH PRECIPITATION >= 5 2 2 3 4 0 1 0 0 1 3 3 3 22 DAYS WITH PRECIPITATION >= 1 6 4 7 9 0 1 0 2 5 5 3 5 47 DAYS WITH PRECIPITATION 12 5 10 13 2 2 2 5 8 8 4 8 79 GREATEST DAILY PRECIPITATION 6.0 20.0 19.0 38.0 0.7 20.0 0.9 3.0 11.0 17.3 23.0 9.0 38.0 DAY 6 24 18 25 7 23 8 20 27 13 26 18 DAY WITH THUNDER STORM 0 0 0 0 0 1 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 1 0 0 1 0 0 1 0 1 0 5 WIND DIRECTION (PREVAILING) 45 225 225 225 270 270 270 225 225 225 225 45 225 PREVAILING WIND SPEED(KNOTS) 7.2 4.9 5.5 6.0 5.5 6.5 3.9 4.4 3.5 5.8 8.3 7.7 4.9 PREVAILING WIND PERCENT 10.3 9.3 10.4 6.7 9.7 13.3 12.9 17.4 7.3 7.1 4.7 3.9 8.1 CALMS PERCENT OF WIND 72.3 70.7 75.3 72.7 72.9 60.7 64.5 68.4 76.7 83.9 84.7 83.9 73.9 NO. OF WIND OBSERVATION 155 140 154 150 155 150 155 155 150 155 150 155 1824 VECTOR WIND DIRECTION (MEAN) 64 218 233 233 267 263 228 220 253 240 210 79 235 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.3 0.6 0.4 0.6 1.1 1.1 1.1 0.5 0.6 0.3 0.5 0.4 WIND STEADINESES (MEAN %) 46.7 21.4 50.0 30.8 42.9 55.0 68.7 84.6 45.5 75.0 27.3 50.0 30.8 WIND SPEED (MEAN KNOTS) 1.5 1.4 1.2 1.3 1.4 2.0 1.6 1.3 1.1 0.8 1.1 1.0 1.3 FASTEST WIND DIRECTION 60 60 240 250 290 340 220 210 170 230 260 80 60 FASTEST WIND SPEED (KNOTS) 29 19 12 12 14 19 14 12 23 12 23 16 29 DAY 25 26 10 3 29 14 23 8 1 4 24 24 DAYS WITH SKY CLEAR (0-2)/8 10 13 15 4 11 15 8 10 16 15 19 12 148 DAYS WITH P.CLOUDY (3-6)/8 7 5 6 7 11 9 18 12 9 10 9 7 110 DAYS WITH CLOUDY (7-8)/8 14 10 10 19 9 6 5 9 5 6 2 12 107 DAYS WITH VISIBILITY =< 2 KM 4 1 4 4 0 0 0 0 1 0 1 2 17 DURATION OF SUNSHINE HOURS 131.5 154.5 212.2 125.5 277.1 292.6 240.1 212.8 245.5 218.7 222.3 164.1 2496.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1015.9 1015.6 1012.3 1008.3 1009.8 1004.1 1001.3 1003.4 1006.6 1014.8 1011.5 1017.5 1010.1 MAX. QFE PRESSURE IN HPA 1031.5 1025.3 1026.3 1021.8 1018.9 1012.0 1007.9 1010.5 1018.8 1030.5 1025.4 1030.9 1031.5 DAY-HOUR 7- 6 12- 6 3- 6 7- 3 26- 3 1- 3 23- 6 24- 6 27- 6 17-15 15- 6 10- 6 MIN. QFE PRESSURE IN HPA 1004.3 996.5 944.8 995.8 1000.1 988.6 993.2 995.8 999.1 1000.5 998.0 1006.7 944.8 DAY-HOUR 17- 3 8-15 25-15 19-15 2-12 29-15 15-15 7-15 5-12 4- 3 24-12 22- 3 MEAN QNH PRESSURE IN HPA 1020.1 1019.7 1016.5 1012.5 1013.9 1008.2 1005.4 1007.5 1010.7 1019.0 1015.6 1021.7 1014.2 MAX. QNH PRESSURE IN HPA 1035.7 1029.5 1030.5 1026.0 1023.1 1016.2 1012.1 1014.7 1023.0 1034.7 1029.6 1035.1 1035.7 DAY-HOUR 7- 6 12- 6 3- 6 7- 3 26- 3 1- 3 23- 6 24- 6 27- 6 17-15 15- 6 10- 6 MIN. QNH PRESSURE IN HPA 1008.4 1000.6 948.7 999.9 1004.2 992.7 997.3 999.9 1003.2 1004.6 1002.1 1010.9 948.7 DAY-HOUR 17- 3 8-15 25-15 19-15 2-12 29-15 15-15 7-15 5-12 4- 3 24-12 22- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.0 1016.1 1013.1 1008.5 1010.8 1005.4 1002.5 1004.5 1007.5 1015.0 1012.0 1017.9 1010.8 MAX. QFE PRESSURE IN HPA 1031.0 1023.8 1025.7 1021.8 1018.9 1012.0 1007.2 1010.0 1018.2 1028.0 1023.3 1030.4 1031.0 DAY 7 12 3 7 26 1 23 20 22 25 15 10 MIN. QFE PRESSURE IN HPA 1004.3 1005.0 997.8 997.8 1001.3 993.2 995.5 997.6 999.5 1000.5 1001.2 1006.7 993.2 DAY 17 8 25 19 2 29 16 12 20 4 24 22 MEAN QNH PRESSURE IN HPA 1020.1 1020.2 1017.3 1012.7 1015.0 1009.6 1006.6 1008.6 1011.6 1019.2 1016.2 1022.1 1014.9 MAX. QNH PRESSURE IN HPA 1035.2 1028.0 1029.9 1026.0 1023.1 1016.2 1011.4 1014.2 1022.4 1032.2 1027.5 1034.6 1035.2 DAY 7 12 3 7 26 1 23 20 22 25 15 10 MIN. QNH PRESSURE IN HPA 1008.4 1009.1 1001.9 1001.9 1005.4 997.3 999.6 1001.7 1003.6 1004.6 1005.3 1010.9 997.3 DAY 17 8 25 19 2 29 16 12 20 4 24 22 MEAN QFF PRESSURE IN HPA 1020.5 1020.5 1017.6 1013.0 1015.1 1009.6 1006.7 1008.7 1011.7 1019.4 1016.5 1022.5 1015.2 MAX. QFF PRESSURE IN HPA 1035.7 1028.4 1030.4 1026.3 1023.2 1016.3 1011.4 1014.3 1022.7 1032.5 1027.9 1035.1 1035.7 DAY 7 12 3 7 26 1 23 20 22 25 15 10 MIN. QFF PRESSURE IN HPA 1008.8 1009.5 1002.1 1002.1 1005.6 997.3 999.6 1001.8 1003.7 1004.7 1005.6 1011.2 997.3 DAY 17 8 25 19 2 29 16 12 20 4 24 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1017.1 1016.5 1013.6 1009.1 1010.9 1005.2 1002.5 1004.8 1007.8 1015.9 1012.8 1018.6 1011.2 MAX. QFE PRESSURE IN HPA 1031.5 1025.3 1026.3 1021.2 1018.9 1012.0 1007.9 1010.5 1018.8 1030.1 1025.4 1030.9 1031.5 DAY 7 12 3 7 26 1 23 24 27 17 15 10 MIN. QFE PRESSURE IN HPA 1007.3 1003.5 997.5 998.1 1002.4 992.6 996.3 998.0 1000.2 1005.7 1001.1 1007.8 992.6 DAY 11 8 25 19 2 29 16 12 20 3 24 22 MEAN QNH PRESSURE IN HPA 1021.2 1020.7 1017.7 1013.2 1015.1 1009.4 1006.6 1009.0 1012.0 1020.1 1017.0 1022.8 1015.4 MAX. QNH PRESSURE IN HPA 1035.7 1029.5 1030.5 1025.4 1023.1 1016.2 1012.1 1014.7 1023.0 1034.3 1029.6 1035.1 1035.7 DAY 7 12 3 7 26 1 23 24 27 17 15 10 MIN. QNH PRESSURE IN HPA 1011.5 1007.6 1001.6 1002.2 1006.5 996.7 1000.4 1002.1 1004.3 1009.8 1005.2 1012.0 996.7 DAY 11 8 25 19 2 29 16 12 20 3 24 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1015.8 1015.5 1013.1 1008.4 1009.9 1004.1 1001.4 1003.6 1006.6 1014.7 1011.0 1017.3 1010.1 MAX. QFE PRESSURE IN HPA 1029.9 1024.7 1025.6 1018.6 1016.8 1011.2 1007.0 1009.5 1017.2 1030.1 1024.8 1029.5 1030.1 DAY 7 12 2 7 26 23 23 24 27 17 15 10 MIN. QFE PRESSURE IN HPA 1005.0 999.3 996.8 998.0 1001.1 991.3 996.0 997.8 1000.1 1003.7 998.5 1007.1 991.3 DAY 11 8 25 19 7 29 16 12 19 3 24 22 MEAN QNH PRESSURE IN HPA 1020.0 1019.7 1017.3 1012.6 1014.0 1008.2 1005.5 1007.7 1010.7 1018.9 1015.2 1021.4 1014.3 MAX. QNH PRESSURE IN HPA 1034.1 1028.9 1029.8 1022.8 1021.0 1015.4 1011.2 1013.7 1021.4 1034.3 1029.0 1033.7 1034.3 DAY 7 12 2 7 26 23 23 24 27 17 15 10 MIN. QNH PRESSURE IN HPA 1009.1 1003.4 1000.9 1002.1 1005.2 995.4 1000.1 1001.9 1004.2 1007.8 1002.6 1011.3 995.4 DAY 11 8 25 19 7 29 16 12 19 3 24 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1014.6 1011.5 1007.7 1008.6 1003.0 1000.1 1002.1 1005.4 1014.1 1010.3 1016.5 1009.1 MAX. QFE PRESSURE IN HPA 1028.4 1023.1 1023.0 1017.4 1015.1 1010.7 1005.6 1008.2 1016.1 1030.3 1023.8 1029.0 1030.3 DAY 7 12 3 13 26 23 23 24 27 17 15 10 MIN. QFE PRESSURE IN HPA 1004.5 996.8 995.1 996.2 1000.1 989.7 994.2 996.9 999.1 1002.0 998.0 1006.9 989.7 DAY 11 8 25 19 2 29 16 22 5 3 24 26 MEAN QNH PRESSURE IN HPA 1019.6 1018.8 1015.6 1011.8 1012.7 1007.2 1004.2 1006.3 1009.5 1018.3 1014.4 1020.7 1013.3 MAX. QNH PRESSURE IN HPA 1032.6 1027.3 1027.2 1021.6 1019.3 1014.9 1009.7 1012.4 1020.3 1034.5 1028.0 1033.2 1034.5 DAY 7 12 3 13 26 23 23 24 27 17 15 10 MIN. QNH PRESSURE IN HPA 1008.6 1000.9 999.2 1000.3 1004.2 993.8 998.3 1001.0 1003.2 1006.1 1002.1 1011.1 993.8 DAY 11 8 25 19 2 29 16 22 5 3 24 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1015.5 1015.2 1010.5 1008.0 1008.7 1002.9 1000.0 1002.1 1005.7 1014.6 1011.2 1017.3 1009.3 MAX. QFE PRESSURE IN HPA 1029.5 1023.3 1025.4 1017.7 1015.0 1010.6 1005.1 1008.3 1017.2 1030.5 1024.7 1028.9 1030.5 DAY 6 12 2 6 3 23 7 19 21 17 15 10 MIN. QFE PRESSURE IN HPA 1004.5 996.5 944.8 995.8 1000.1 988.6 993.2 995.8 999.5 1001.4 1000.5 1008.0 944.8 DAY 16 8 25 19 2 29 15 7 4 3 11 26 MEAN QNH PRESSURE IN HPA 1019.6 1019.4 1014.6 1012.2 1012.8 1007.0 1004.2 1006.2 1009.9 1018.8 1015.4 1021.5 1013.5 MAX. QNH PRESSURE IN HPA 1033.7 1027.5 1029.6 1021.9 1019.2 1014.8 1009.2 1012.5 1021.4 1034.7 1028.9 1033.1 1034.7 DAY 6 12 2 6 3 23 7 19 21 17 15 10 MIN. QNH PRESSURE IN HPA 1008.6 1000.6 948.7 999.9 1004.2 992.7 997.3 999.9 1003.6 1005.5 1004.6 1012.2 948.7 DAY 16 8 25 19 2 29 15 7 4 3 11 26 MEAN QFF PRESSURE IN HPA 1019.8 1019.6 1014.9 1012.4 1013.0 1007.1 1004.2 1006.3 1010.0 1019.1 1015.7 1021.9 1013.7 MAX. QFF PRESSURE IN HPA 1034.1 1027.9 1030.0 1022.2 1019.4 1015.0 1009.3 1012.6 1021.6 1035.1 1029.3 1033.6 1035.1 DAY 6 12 2 6 3 23 7 19 21 17 15 10 MIN. QFF PRESSURE IN HPA 1009.0 1000.9 948.9 1000.0 1004.4 992.7 997.3 999.9 1003.7 1005.7 1004.8 1012.5 948.9 DAY 16 8 25 19 2 29 15 7 5 3 11 26 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 GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.8 9.0 9.3 15.0 24.8 27.0 31.3 30.6 27.7 20.6 13.2 11.8 18.9 MINIMUN AIR TEMPERATURE (C) 1.5 3.6 5.1 9.6 15.9 19.3 23.2 23.3 19.5 12.6 6.8 4.3 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 5 28 26 10 0 0 0 71 DAYS WITH MINIMUM TEMP. <=-4 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 11 6 0 0 0 0 0 0 0 0 0 4 21 TEMPERATURE RECORDS LOWEST(C) -2.6 -4.0 1.0 1.0 8.6 16.6 18.8 17.0 12.4 7.0 0.4 -1.0 -4.0 DAY 16 4 20 6 2 7 15 31 21 20 19 4 MAXIMUM AIR TEMPERATURE (C) 10.9 13.1 12.3 19.3 29.8 32.0 36.2 35.6 33.1 26.2 18.0 17.4 23.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 15 22 29 30 24 6 0 0 127 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.6 29.2 22.6 31.5 40.0 39.6 42.0 40.0 42.0 37.6 22.8 26.6 42.0 DAY 5 9 30 18 24 29 24 26 7 24 6 25 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 9.5 7.2 9.7 13.9 12.7 13.0 12.3 13.6 13.6 11.2 13.1 11.6 MEAN DAILY TEMP. (MDT) (C) 6.2 8.4 8.7 14.4 22.8 25.7 29.7 29.5 26.3 19.4 12.4 10.9 17.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.3 0.0 1.3 78.3 139.5 269.6 262.3 161.0 17.6 0.0 0.0 930.0 HEATING DEG. DAYS(BASE 18 0C) 365.6 282.9 289.0 118.3 4.5 0.0 0.0 0.0 0.0 15.2 168.4 221.4 1465.3 DEWPOINT (MEAN C) 3.1 3.0 5.9 10.7 17.1 17.6 20.1 19.6 17.4 11.2 7.7 4.7 11.5 MIXING RATIO (G/KG) 4.80 4.83 5.83 8.17 12.44 12.78 15.07 14.75 12.72 8.49 6.68 5.41 9.33 VAPOUR PRESSURE (HPA) 7.79 7.82 9.40 13.11 19.75 20.26 23.77 23.26 20.13 13.63 10.82 8.74 14.87 SATURATION DEF. (HPA) 2.50 4.58 2.62 4.76 13.30 16.52 23.13 21.72 18.78 12.02 5.00 5.91 10.90 RELATIVE HUMIDITY (MEAN %) 79 70 81 79 65 60 54 55 57 60 72 65 66 RELATIVE HUMIDITY (MAX. %) 94 87 94 94 89 81 76 79 81 85 92 83 86 RELATIVE HUMIDITY (MIN. %) 63 57 70 67 51 47 40 40 41 43 54 48 52 RELATIVE HUMIDITY (MEAN% 03UTC) 92 85 92 93 88 81 76 78 80 83 92 79 85 RELATIVE HUMIDITY (MEAN% 09UTC) 69 60 73 72 56 51 45 46 46 47 57 53 56 RELATIVE HUMIDITY (MEAN% 15UTC) 81 72 81 79 63 55 49 51 56 63 77 72 67 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 29.9 35.5 71.2 56.3 20.8 37.1 2.4 7.1 31.0 53.0 35.8 14.2 394.3 DAYS WITH PRECIPITATION >=10 1 0 1 2 0 1 0 0 1 2 1 0 9 DAYS WITH PRECIPITATION >= 5 2 4 9 3 2 3 0 1 1 3 2 1 31 DAYS WITH PRECIPITATION >= 1 6 7 11 12 6 7 1 2 2 5 4 3 66 DAYS WITH PRECIPITATION 8 11 20 18 9 9 4 6 5 9 8 5 112 GREATEST DAILY PRECIPITATION 15.1 9.0 15.0 16.0 6.0 19.1 2.0 5.0 29.0 26.0 25.8 9.0 29.0 DAY 9 11 15 15 25 26 29 30 23 31 12 15 DAY WITH THUNDER STORM 0 0 0 1 1 0 1 0 1 0 0 0 4 DAYS WITH SNOW OR SLEET 0 2 1 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 2 0 0 3 WIND DIRECTION (PREVAILING) 225 90 225 225 270 225 270 225 225 225 45 90 225 PREVAILING WIND SPEED(KNOTS) 8.0 5.8 5.8 6.3 8.6 6.0 6.7 5.2 4.2 4.8 5.0 6.3 5.3 PREVAILING WIND PERCENT 2.6 5.5 16.1 15.3 7.7 10.7 12.8 16.1 8.7 10.3 2.7 7.7 9.0 CALMS PERCENT OF WIND 94.8 76.6 65.8 62.7 75.5 73.3 67.9 69.7 77.3 70.3 88.0 72.9 74.5 NO. OF WIND OBSERVATION 155 145 155 150 155 150 156 155 150 155 150 155 1831 VECTOR WIND DIRECTION (MEAN) 240 143 230 242 268 251 245 236 242 252 345 97 241 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.5 1.1 1.1 0.5 1.1 1.3 1.1 0.6 0.3 0.3 0.2 0.6 WIND STEADINESES (MEAN %) 100.0 33.3 68.7 50.0 33.3 68.7 76.5 78.6 54.5 17.6 50.0 13.3 42.9 WIND SPEED (MEAN KNOTS) 0.3 1.5 1.6 2.2 1.5 1.6 1.7 1.4 1.1 1.7 0.6 1.5 1.4 FASTEST WIND DIRECTION 230 80 210 50 70 230 220 250 250 300 320 60 70 FASTEST WIND SPEED (KNOTS) 10 16 27 21 39 23 33 14 14 29 16 16 39 DAY 6 9 15 22 29 30 29 8 16 14 12 17 DAYS WITH SKY CLEAR (0-2)/8 4 5 1 3 10 11 14 18 17 12 10 9 114 DAYS WITH P.CLOUDY (3-6)/8 13 8 7 6 11 10 15 7 7 13 13 14 124 DAYS WITH CLOUDY (7-8)/8 14 16 23 21 10 9 2 6 6 6 7 8 128 DAYS WITH VISIBILITY =< 2 KM 2 5 3 6 2 2 0 0 1 1 2 4 28 DURATION OF SUNSHINE HOURS 120.6 124.5 81.4 125.5 247.2 239.1 299.4 270.4 233.2 209.7 190.1 179.7 2320.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1018.8 1014.9 1013.5 1012.6 1008.5 1006.6 1005.0 1004.9 1004.7 1012.5 1019.9 1014.9 1011.4 MAX. QFE PRESSURE IN HPA 1034.3 1026.2 1021.5 1027.0 1017.3 1015.5 1015.0 1017.1 1015.5 1026.1 1032.3 1026.3 1034.3 DAY-HOUR 10- 6 13- 6 16- 6 4- 6 1-15 12- 3 3- 6 29- 6 30-15 2- 3 18- 6 1- 6 MIN. QFE PRESSURE IN HPA 1001.1 994.3 999.7 994.0 998.1 997.7 997.3 995.4 993.3 999.8 1010.9 1000.4 993.3 DAY-HOUR 6-12 9-12 2-15 18-15 29- 6 1- 3 24-12 8-12 8-12 26-15 6-12 25-12 MEAN QNH PRESSURE IN HPA 1023.0 1019.1 1017.6 1016.8 1012.6 1010.8 1009.2 1009.1 1008.9 1016.7 1024.1 1019.0 1015.6 MAX. QNH PRESSURE IN HPA 1038.5 1030.4 1025.7 1031.2 1021.5 1019.7 1019.2 1021.3 1019.7 1030.3 1036.5 1030.5 1038.5 DAY-HOUR 10- 6 13- 6 16- 6 4- 6 1-15 12- 3 3- 6 29- 6 30-15 2- 3 18- 6 1- 6 MIN. QNH PRESSURE IN HPA 1005.2 998.4 1003.8 998.1 1002.2 1001.8 1001.4 999.5 997.4 1003.9 1015.1 1004.5 997.4 DAY-HOUR 6-12 9-12 2-15 18-15 29- 6 1- 3 24-12 8-12 8-12 26-15 6-12 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.1 1015.1 1013.7 1012.5 1009.1 1007.6 1006.1 1005.8 1005.4 1012.9 1020.2 1015.0 1011.9 MAX. QFE PRESSURE IN HPA 1033.6 1025.7 1021.0 1026.3 1016.5 1015.5 1014.3 1016.1 1013.6 1026.1 1031.7 1024.0 1033.6 DAY 10 13 16 5 7 12 3 29 24 2 18 8 MIN. QFE PRESSURE IN HPA 1007.2 1002.4 1003.9 994.2 998.5 997.7 1000.6 996.9 994.0 1000.2 1013.5 1003.1 994.0 DAY 5 9 2 13 29 1 7 8 8 27 6 25 MEAN QNH PRESSURE IN HPA 1023.3 1019.3 1017.8 1016.7 1013.2 1011.7 1010.3 1010.0 1009.6 1017.1 1024.4 1019.2 1016.1 MAX. QNH PRESSURE IN HPA 1037.8 1029.9 1025.2 1030.5 1020.7 1019.7 1018.5 1020.3 1017.8 1030.3 1035.9 1028.2 1037.8 DAY 10 13 16 5 7 12 3 29 24 2 18 8 MIN. QNH PRESSURE IN HPA 1011.4 1006.5 1008.0 998.3 1002.6 1001.8 1004.7 1001.0 998.1 1004.3 1017.7 1007.2 998.1 DAY 5 9 2 13 29 1 7 8 8 27 6 25 MEAN QFF PRESSURE IN HPA 1023.8 1019.7 1018.2 1017.0 1013.4 1011.8 1010.3 1010.0 1009.7 1017.3 1024.8 1019.4 1016.3 MAX. QFF PRESSURE IN HPA 1038.4 1030.4 1025.6 1030.9 1020.9 1019.8 1018.6 1020.4 1018.0 1030.6 1036.4 1028.7 1038.4 DAY 10 13 16 5 7 12 3 29 24 2 18 8 MIN. QFF PRESSURE IN HPA 1011.7 1006.8 1008.5 998.6 1002.7 1001.9 1004.8 1001.1 998.1 1004.5 1018.0 1007.5 998.1 DAY 5 9 2 13 29 1 7 8 8 27 6 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1019.9 1015.9 1014.2 1013.6 1009.4 1007.7 1006.3 1006.2 1005.9 1013.5 1021.0 1016.0 1012.5 MAX. QFE PRESSURE IN HPA 1034.3 1026.2 1021.5 1027.0 1017.0 1015.4 1015.0 1017.1 1014.4 1026.1 1032.3 1026.3 1034.3 DAY 10 13 16 4 7 12 3 29 24 2 18 1 MIN. QFE PRESSURE IN HPA 1005.3 999.2 1004.3 997.6 998.1 998.5 1000.4 997.6 993.6 1002.0 1013.1 1003.9 993.6 DAY 6 9 2 13 29 1 24 8 8 27 6 25 MEAN QNH PRESSURE IN HPA 1024.1 1020.1 1018.4 1017.8 1013.5 1011.9 1010.5 1010.4 1010.1 1017.7 1025.2 1020.2 1016.6 MAX. QNH PRESSURE IN HPA 1038.5 1030.4 1025.7 1031.2 1021.2 1019.6 1019.2 1021.3 1018.6 1030.3 1036.5 1030.5 1038.5 DAY 10 13 16 4 7 12 3 29 24 2 18 1 MIN. QNH PRESSURE IN HPA 1009.4 1003.3 1008.4 1001.7 1002.2 1002.6 1004.5 1001.7 997.7 1006.1 1017.3 1008.0 997.7 DAY 6 9 2 13 29 1 24 8 8 27 6 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1014.8 1013.4 1012.9 1008.7 1006.8 1005.1 1005.0 1004.8 1012.2 1019.6 1014.6 1011.4 MAX. QFE PRESSURE IN HPA 1032.7 1025.3 1021.2 1026.1 1016.5 1014.3 1014.3 1015.4 1013.4 1023.7 1031.1 1025.5 1032.7 DAY 10 13 16 4 1 11 3 29 24 2 16 1 MIN. QFE PRESSURE IN HPA 1002.7 996.1 1001.4 996.8 1000.1 997.9 999.1 996.6 994.5 1001.9 1011.8 1001.5 994.5 DAY 6 9 2 18 24 1 24 8 8 26 6 25 MEAN QNH PRESSURE IN HPA 1022.7 1019.0 1017.6 1017.1 1012.9 1010.9 1009.3 1009.2 1008.9 1016.3 1023.8 1018.8 1015.5 MAX. QNH PRESSURE IN HPA 1036.9 1029.5 1025.4 1030.3 1020.7 1018.5 1018.5 1019.6 1017.6 1027.9 1035.3 1029.7 1036.9 DAY 10 13 16 4 1 11 3 29 24 2 16 1 MIN. QNH PRESSURE IN HPA 1006.8 1000.2 1005.5 1000.9 1004.2 1002.0 1003.2 1000.7 998.6 1006.0 1016.0 1005.6 998.6 DAY 6 9 2 18 24 1 24 8 8 26 6 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.0 1014.1 1012.9 1012.1 1007.6 1005.5 1003.8 1003.8 1003.6 1011.6 1019.0 1014.0 1010.5 MAX. QFE PRESSURE IN HPA 1031.8 1024.7 1020.7 1025.3 1016.9 1013.3 1012.6 1014.6 1013.1 1022.2 1030.5 1024.9 1031.8 DAY 10 13 16 4 1 11 3 29 30 1 16 1 MIN. QFE PRESSURE IN HPA 1001.1 994.3 1003.8 994.6 1000.8 998.4 997.3 995.4 993.3 999.9 1010.9 1000.4 993.3 DAY 6 9 2 18 24 1 24 8 8 26 6 25 MEAN QNH PRESSURE IN HPA 1022.2 1018.3 1017.1 1016.3 1011.8 1009.7 1007.9 1007.9 1007.8 1015.8 1023.2 1018.2 1014.7 MAX. QNH PRESSURE IN HPA 1036.0 1028.9 1024.9 1029.5 1021.1 1017.5 1016.8 1018.8 1017.3 1026.4 1034.7 1029.1 1036.0 DAY 10 13 16 4 1 11 3 29 30 1 16 1 MIN. QNH PRESSURE IN HPA 1005.2 998.4 1007.9 998.7 1004.9 1002.5 1001.4 999.5 997.4 1004.0 1015.1 1004.5 997.4 DAY 6 9 2 18 24 1 24 8 8 26 6 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1018.7 1014.8 1013.2 1011.9 1007.7 1005.5 1003.8 1003.8 1004.0 1012.4 1019.8 1014.7 1010.9 MAX. QFE PRESSURE IN HPA 1032.2 1024.8 1021.2 1025.5 1017.3 1014.1 1011.8 1014.6 1015.5 1023.8 1031.1 1025.1 1032.2 DAY 9 13 16 4 1 11 3 29 30 1 16 1 MIN. QFE PRESSURE IN HPA 1001.3 995.3 999.7 994.0 1000.8 998.3 997.7 997.0 993.3 999.8 1011.6 1001.9 993.3 DAY 6 9 2 18 30 4 24 8 8 26 6 24 MEAN QNH PRESSURE IN HPA 1022.9 1019.0 1017.4 1016.1 1011.8 1009.7 1008.0 1008.0 1008.1 1016.6 1024.0 1018.9 1015.0 MAX. QNH PRESSURE IN HPA 1036.4 1029.0 1025.4 1029.7 1021.5 1018.3 1016.0 1018.8 1019.7 1028.0 1035.3 1029.3 1036.4 DAY 9 13 16 4 1 11 3 29 30 1 16 1 MIN. QNH PRESSURE IN HPA 1005.4 999.4 1003.8 998.1 1004.9 1002.4 1001.8 1001.1 997.4 1003.9 1015.8 1006.0 997.4 DAY 6 9 2 18 30 4 24 8 8 26 6 24 MEAN QFF PRESSURE IN HPA 1023.3 1019.4 1017.8 1016.4 1012.0 1009.8 1008.0 1008.0 1008.2 1016.8 1024.4 1019.1 1015.3 MAX. QFF PRESSURE IN HPA 1036.9 1029.5 1025.9 1030.1 1021.8 1018.4 1016.0 1018.9 1019.8 1028.2 1035.8 1029.8 1036.9 DAY 10 26 16 4 1 11 3 29 30 1 16 1 MIN. QFF PRESSURE IN HPA 1005.8 999.6 1004.2 998.3 1005.0 1002.5 1001.8 1001.2 997.5 1004.2 1016.1 1006.4 997.5 DAY 6 9 2 18 30 4 24 8 8 26 6 24 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 GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.5 8.3 10.7 19.2 24.9 29.7 30.1 31.3 26.3 23.4 13.6 10.6 19.8 MINIMUN AIR TEMPERATURE (C) 3.1 2.0 3.8 9.9 15.0 20.9 24.3 24.5 18.9 14.9 7.5 5.1 12.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 16 31 29 8 1 0 0 86 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 8 8 3 0 0 0 0 0 0 0 0 1 20 TEMPERATURE RECORDS LOWEST(C) -2.6 -3.0 -0.4 2.6 10.5 15.3 21.2 18.6 12.5 11.2 4.0 0.0 -3.0 DAY 31 10 12 3 7 5 9 27 21 19 29 19 MAXIMUM AIR TEMPERATURE (C) 14.2 12.8 14.9 24.5 30.0 34.6 34.3 36.0 31.5 29.0 17.8 15.1 24.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 5 16 27 28 31 15 15 0 0 137 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.6 21.0 27.7 37.5 40.6 43.8 40.0 40.4 41.0 36.2 29.6 26.5 43.8 DAY 6 17 24 24 28 12 10 12 11 13 4 8 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 10.8 11.1 14.6 15.0 13.7 10.0 11.5 12.6 14.1 10.3 10.0 12.0 MEAN DAILY TEMP. (MDT) (C) 8.6 7.4 9.3 17.2 22.5 27.8 29.3 30.3 25.2 21.9 12.6 10.1 18.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 11.3 70.1 202.8 257.2 287.3 128.5 44.5 0.0 0.0 1001.9 HEATING DEG. DAYS(BASE 18 0C) 291.0 297.2 269.0 61.4 2.9 0.0 0.0 0.0 0.0 1.2 161.8 247.6 1332.1 DEWPOINT (MEAN C) 3.9 2.1 4.9 9.7 13.0 19.6 21.7 22.6 16.8 14.9 9.3 5.4 12.0 MIXING RATIO (G/KG) 5.13 4.49 5.54 7.70 9.64 14.71 16.62 17.73 12.26 10.93 7.38 5.64 9.81 VAPOUR PRESSURE (HPA) 8.29 7.28 8.90 12.30 15.38 23.17 26.06 27.78 19.49 17.43 11.90 9.11 15.59 SATURATION DEF. (HPA) 4.15 4.26 4.79 11.64 18.02 20.06 17.40 19.01 16.21 12.71 4.26 4.38 11.41 RELATIVE HUMIDITY (MEAN %) 72 69 71 59 53 58 63 63 60 63 78 74 65 RELATIVE HUMIDITY (MAX. %) 90 88 92 84 79 83 83 85 83 84 95 89 86 RELATIVE HUMIDITY (MIN. %) 55 51 56 42 37 43 50 48 42 47 63 59 49 RELATIVE HUMIDITY (MEAN% 03UTC) 88 87 90 83 77 82 83 85 82 83 94 86 85 RELATIVE HUMIDITY (MEAN% 09UTC) 61 58 61 50 42 47 55 52 49 52 65 62 55 RELATIVE HUMIDITY (MEAN% 15UTC) 74 72 71 56 49 52 59 57 61 66 84 81 65 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 26.2 34.0 98.4 5.4 40.8 21.5 2.0 7.0 15.2 39.2 56.9 66.5 413.1 DAYS WITH PRECIPITATION >=10 0 1 4 0 2 1 0 0 1 2 2 3 16 DAYS WITH PRECIPITATION >= 5 2 3 7 0 3 1 0 1 1 3 4 5 30 DAYS WITH PRECIPITATION >= 1 7 6 12 3 4 5 1 1 2 6 8 5 60 DAYS WITH PRECIPITATION 13 9 17 11 9 9 9 2 8 7 9 11 114 GREATEST DAILY PRECIPITATION 9.0 10.0 20.0 1.1 17.0 12.0 1.1 7.0 14.0 17.0 21.0 29.0 29.0 DAY 11 7 20 29 5 8 26 22 15 8 14 11 DAY WITH THUNDER STORM 0 0 0 0 2 3 0 0 0 2 1 0 8 DAYS WITH SNOW OR SLEET 0 3 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 0 0 1 1 0 0 0 0 0 1 3 WIND DIRECTION (PREVAILING) 225 225 225 225 270 270 225 225 225 225 45 45 225 PREVAILING WIND SPEED(KNOTS) 6.2 9.1 7.9 6.8 5.1 5.2 5.4 4.0 5.7 5.1 5.7 4.6 6.0 PREVAILING WIND PERCENT 8.4 10.7 11.0 10.0 13.5 11.3 19.4 18.7 14.0 7.1 4.0 11.0 10.7 CALMS PERCENT OF WIND 66.5 60.0 57.4 68.7 67.1 64.7 66.5 63.2 74.7 77.4 88.0 63.9 68.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 106 202 244 240 255 250 232 232 241 239 30 67 239 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.1 1.4 0.8 0.9 0.8 1.4 1.0 0.9 0.5 0.2 0.3 0.6 WIND STEADINESES (MEAN %) 8.0 3.0 56.0 42.1 50.0 40.0 77.8 71.4 69.2 45.5 33.3 16.7 33.3 WIND SPEED (MEAN KNOTS) 2.5 3.3 2.5 1.9 1.8 2.0 1.8 1.4 1.3 1.1 0.6 1.8 1.8 FASTEST WIND DIRECTION 60 70 230 250 230 250 240 230 230 180 270 90 230 FASTEST WIND SPEED (KNOTS) 27 39 39 25 78 29 23 19 14 21 10 16 78 DAY 19 3 24 16 4 1 5 19 8 12 5 9 DAYS WITH SKY CLEAR (0-2)/8 9 10 11 9 14 15 8 15 13 15 11 10 140 DAYS WITH P.CLOUDY (3-6)/8 9 10 5 11 10 10 12 10 9 10 8 11 115 DAYS WITH CLOUDY (7-8)/8 13 8 15 10 7 5 11 6 8 6 11 10 110 DAYS WITH VISIBILITY =< 2 KM 0 1 3 3 0 0 0 0 0 1 4 2 14 DURATION OF SUNSHINE HOURS 156.5 167.0 183.6 225.5 275.5 282.7 209.3 251.7 215.0 232.0 160.1 146.1 2505.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1014.1 1016.6 1011.3 1007.2 1008.9 1003.4 1001.9 1003.4 1009.4 1010.1 1016.2 1014.2 1009.7 MAX. QFE PRESSURE IN HPA 1027.2 1026.7 1030.6 1019.0 1018.4 1011.4 1010.7 1011.8 1019.5 1020.4 1030.9 1026.2 1030.9 DAY-HOUR 23-15 7- 9 11- 6 20- 6 15- 9 4- 3 19- 6 21- 6 15- 6 31-15 7- 6 17- 9 MIN. QFE PRESSURE IN HPA 1000.0 1007.0 997.4 989.8 991.1 995.3 994.1 994.4 994.9 1001.3 1002.1 997.7 989.8 DAY-HOUR 15-15 22-12 23-12 9-15 4-12 30-15 1-15 5-12 1-15 6-12 5- 3 9-12 MEAN QNH PRESSURE IN HPA 1018.3 1020.8 1015.5 1011.3 1013.1 1007.5 1006.0 1007.5 1013.6 1014.3 1020.4 1018.4 1013.9 MAX. QNH PRESSURE IN HPA 1031.4 1030.9 1034.8 1023.2 1022.6 1015.6 1014.9 1016.0 1023.7 1024.6 1035.1 1030.4 1035.1 DAY-HOUR 23-15 7- 9 11- 6 20- 6 15- 9 4- 3 19- 6 21- 6 15- 6 31-15 7- 6 17- 9 MIN. QNH PRESSURE IN HPA 1004.1 1011.2 1001.5 993.9 995.2 999.4 998.2 998.5 999.0 1005.4 1006.2 1001.8 993.9 DAY-HOUR 15-15 22-12 23-12 9-15 4-12 30-15 1-15 5-12 1-15 6-12 5- 3 9-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1014.7 1016.8 1011.7 1007.8 1009.8 1004.7 1003.1 1004.6 1010.3 1010.3 1016.4 1014.3 1010.4 MAX. QFE PRESSURE IN HPA 1027.2 1024.7 1030.4 1017.7 1018.3 1011.4 1009.9 1011.5 1019.0 1018.9 1030.2 1023.2 1030.4 DAY 24 21 11 20 16 4 19 21 15 8 7 28 MIN. QFE PRESSURE IN HPA 1003.8 1009.4 998.5 996.0 996.6 999.1 996.5 996.0 996.8 1003.1 1002.1 999.7 996.0 DAY 16 4 23 5 4 13 11 13 2 2 5 9 MEAN QNH PRESSURE IN HPA 1018.9 1020.9 1015.8 1011.9 1013.9 1008.8 1007.3 1008.7 1014.4 1014.5 1020.6 1018.5 1014.5 MAX. QNH PRESSURE IN HPA 1031.4 1028.9 1034.6 1021.9 1022.5 1015.6 1014.1 1015.7 1023.2 1023.1 1034.4 1027.4 1034.6 DAY 24 21 11 20 16 4 19 21 15 8 7 28 MIN. QNH PRESSURE IN HPA 1007.9 1013.6 1002.6 1000.1 1000.7 1003.2 1000.6 1000.1 1000.9 1007.2 1006.2 1003.8 1000.1 DAY 16 4 23 5 4 13 11 13 2 2 5 9 MEAN QFF PRESSURE IN HPA 1019.3 1021.4 1016.2 1012.2 1014.1 1008.9 1007.3 1008.7 1014.6 1014.7 1021.0 1018.9 1014.8 MAX. QFF PRESSURE IN HPA 1031.9 1029.3 1035.1 1022.2 1022.7 1015.8 1014.1 1015.8 1023.4 1023.3 1034.8 1027.9 1035.1 DAY 24 21 11 20 16 4 19 21 15 8 8 28 MIN. QFF PRESSURE IN HPA 1008.2 1014.0 1002.9 1000.4 1000.8 1003.2 1000.6 1000.1 1001.0 1007.4 1006.5 1004.1 1000.1 DAY 16 4 24 5 4 13 11 13 2 2 5 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1015.5 1017.7 1012.3 1008.3 1009.9 1004.5 1003.2 1004.9 1010.6 1011.1 1017.2 1015.3 1010.9 MAX. QFE PRESSURE IN HPA 1026.8 1026.4 1030.6 1019.0 1018.3 1010.6 1010.7 1011.8 1019.5 1020.1 1030.9 1026.1 1030.9 DAY 24 7 11 20 16 4 19 21 15 8 7 17 MIN. QFE PRESSURE IN HPA 1006.7 1010.3 999.7 994.4 996.2 999.6 996.7 995.2 996.9 1005.6 1003.4 1000.4 994.4 DAY 16 22 24 5 4 16 11 5 2 2 5 9 MEAN QNH PRESSURE IN HPA 1019.7 1021.9 1016.5 1012.4 1014.1 1008.6 1007.3 1009.1 1014.8 1015.3 1021.4 1019.5 1015.0 MAX. QNH PRESSURE IN HPA 1031.0 1030.6 1034.8 1023.2 1022.5 1014.8 1014.9 1016.0 1023.7 1024.3 1035.1 1030.3 1035.1 DAY 24 7 11 20 16 4 19 21 15 8 7 17 MIN. QNH PRESSURE IN HPA 1010.9 1014.5 1003.8 998.5 1000.3 1003.7 1000.8 999.3 1001.0 1009.7 1007.5 1004.5 998.5 DAY 16 22 24 5 4 16 11 5 2 2 5 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1013.7 1016.8 1011.4 1007.3 1008.9 1003.5 1001.9 1003.5 1009.3 1009.9 1016.0 1013.7 1009.6 MAX. QFE PRESSURE IN HPA 1025.8 1026.7 1029.6 1017.4 1018.4 1009.9 1010.7 1010.5 1018.0 1018.5 1029.4 1026.2 1029.6 DAY 23 7 11 20 15 3 19 21 15 8 7 17 MIN. QFE PRESSURE IN HPA 1005.6 1007.4 998.7 995.0 994.0 998.5 996.2 994.9 996.9 1003.6 1004.6 998.4 994.0 DAY 15 22 23 5 4 30 11 5 2 6 5 9 MEAN QNH PRESSURE IN HPA 1017.9 1021.0 1015.6 1011.4 1013.1 1007.6 1006.0 1007.6 1013.5 1014.0 1020.2 1017.9 1013.8 MAX. QNH PRESSURE IN HPA 1030.0 1030.9 1033.8 1021.6 1022.6 1014.1 1014.9 1014.7 1022.2 1022.7 1033.6 1030.4 1033.8 DAY 23 7 11 20 15 3 19 21 15 8 7 17 MIN. QNH PRESSURE IN HPA 1009.7 1011.6 1002.8 999.1 998.1 1002.6 1000.3 999.0 1001.0 1007.7 1008.7 1002.5 998.1 DAY 15 22 23 5 4 30 11 5 2 6 5 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1013.0 1015.6 1010.4 1006.2 1007.8 1002.3 1000.6 1002.0 1008.1 1009.2 1015.3 1013.4 1008.7 MAX. QFE PRESSURE IN HPA 1026.0 1026.0 1027.9 1015.7 1018.1 1009.9 1009.8 1009.2 1015.6 1018.5 1029.4 1025.1 1029.4 DAY 23 7 11 13 15 3 19 21 15 31 7 17 MIN. QFE PRESSURE IN HPA 1002.1 1007.0 997.4 992.6 991.1 996.3 994.6 994.4 995.4 1001.3 1005.5 997.7 991.1 DAY 15 22 23 9 4 30 1 5 1 6 4 9 MEAN QNH PRESSURE IN HPA 1017.1 1019.8 1014.6 1010.4 1012.0 1006.5 1004.7 1006.1 1012.3 1013.4 1019.5 1017.6 1012.8 MAX. QNH PRESSURE IN HPA 1030.2 1030.2 1032.1 1019.9 1022.3 1014.1 1014.0 1013.4 1019.8 1022.7 1033.6 1029.3 1033.6 DAY 23 7 11 13 15 3 19 21 15 31 7 17 MIN. QNH PRESSURE IN HPA 1006.2 1011.2 1001.5 996.7 995.2 1000.4 998.7 998.5 999.5 1005.4 1009.6 1001.8 995.2 DAY 15 22 23 9 4 30 1 5 1 6 4 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1013.6 1016.3 1011.0 1006.3 1008.4 1002.1 1000.7 1002.0 1008.7 1010.2 1016.2 1014.3 1009.2 MAX. QFE PRESSURE IN HPA 1027.2 1025.9 1028.1 1015.1 1017.8 1010.0 1009.0 1009.4 1016.2 1020.4 1030.8 1026.1 1030.8 DAY 23 7 11 13 15 3 19 21 14 31 7 17 MIN. QFE PRESSURE IN HPA 1000.0 1007.9 997.4 989.8 998.9 995.3 994.1 994.9 994.9 1002.3 1005.6 999.2 989.8 DAY 15 22 23 9 4 30 1 14 1 6 4 9 MEAN QNH PRESSURE IN HPA 1017.8 1020.5 1015.2 1010.5 1012.5 1006.3 1004.8 1006.1 1012.9 1014.4 1020.4 1018.5 1013.3 MAX. QNH PRESSURE IN HPA 1031.4 1030.1 1032.3 1019.3 1022.0 1014.2 1013.2 1013.6 1020.4 1024.6 1035.0 1030.3 1035.0 DAY 23 7 11 13 15 3 19 21 14 31 7 17 MIN. QNH PRESSURE IN HPA 1004.1 1012.1 1001.5 993.9 1003.0 999.4 998.2 999.0 999.0 1006.4 1009.7 1003.3 993.9 DAY 15 22 23 9 4 30 1 14 1 6 4 9 MEAN QFF PRESSURE IN HPA 1018.2 1020.9 1015.5 1010.7 1012.7 1006.3 1004.9 1006.2 1013.0 1014.6 1020.7 1018.9 1013.6 MAX. QFF PRESSURE IN HPA 1031.9 1030.6 1032.8 1019.6 1022.2 1014.3 1013.3 1013.6 1020.6 1024.9 1035.4 1030.8 1035.4 DAY 23 7 11 13 15 3 19 21 14 31 7 17 MIN. QFF PRESSURE IN HPA 1004.5 1012.4 1001.7 994.1 1003.2 999.4 998.2 999.0 999.0 1006.6 1010.0 1003.6 994.1 DAY 15 22 23 9 4 30 1 14 1 6 4 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.0 7.5 12.7 19.4 24.5 31.7 30.3 30.6 26.0 20.2 16.3 12.6 19.9 MINIMUN AIR TEMPERATURE (C) 2.8 2.0 5.6 11.7 14.8 22.0 23.5 23.9 19.1 12.8 9.2 7.0 12.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 22 28 29 9 0 0 0 89 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 2 8 3 0 0 0 0 0 0 0 0 0 13 TEMPERATURE RECORDS LOWEST(C) -0.4 -3.0 -1.0 5.0 6.8 17.6 20.4 20.4 13.8 5.1 4.2 1.0 -3.0 DAY 18 16 1 2 6 1 24 6 13 10 26 20 MAXIMUM AIR TEMPERATURE (C) 10.4 11.5 17.4 23.8 29.2 36.8 34.8 35.3 31.0 25.7 21.5 16.9 24.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 14 30 29 31 19 8 1 3 139 DAYS WITH MAXIMUM TEMP. <= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 17.4 26.4 27.0 34.5 40.2 42.2 39.6 41.8 39.6 33.6 31.4 34.0 42.2 DAY 30 7 24 15 21 23 11 30 1 17 19 11 DIF. BETWEEN (MAX.-MIN.) (C) 7.6 9.5 11.8 12.1 14.4 14.8 11.3 11.4 11.9 12.9 12.3 9.9 11.6 MEAN DAILY TEMP. (MDT) (C) 6.6 6.8 11.5 17.7 22.0 29.4 29.1 29.6 25.1 19.2 15.4 11.9 18.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 12.0 64.6 252.6 251.9 266.8 122.5 24.3 0.0 2.4 997.3 HEATING DEG. DAYS(BASE 18 0C) 352.5 314.6 201.8 45.7 11.9 0.0 0.0 0.0 0.0 27.7 85.7 196.8 1236.6 DEWPOINT (MEAN C) 3.9 2.5 6.0 12.7 12.9 17.2 20.5 22.0 18.5 11.7 9.4 6.3 12.0 MIXING RATIO (G/KG) 5.03 4.66 6.04 9.43 9.56 12.68 15.49 17.01 13.67 8.92 7.40 6.00 9.66 VAPOUR PRESSURE (HPA) 8.14 7.55 9.71 15.05 15.25 20.07 24.36 26.74 21.65 14.30 11.93 9.72 15.37 SATURATION DEF. (HPA) 2.09 3.43 5.87 8.90 17.13 27.90 19.91 18.14 13.08 10.70 7.50 5.89 11.71 RELATIVE HUMIDITY (MEAN %) 82 75 68 69 53 45 59 63 66 62 67 71 65 RELATIVE HUMIDITY (MAX. %) 94 91 89 89 79 68 81 87 89 86 87 88 86 RELATIVE HUMIDITY (MIN. %) 70 60 50 54 38 32 45 47 50 44 50 57 50 RELATIVE HUMIDITY (MEAN% 03UTC) 91 90 88 89 78 68 80 85 88 85 86 85 84 RELATIVE HUMIDITY (MEAN% 09UTC) 75 65 58 58 43 37 51 55 55 48 56 62 55 RELATIVE HUMIDITY (MEAN% 15UTC) 86 78 67 70 51 41 52 59 67 67 70 73 65 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 85.0 52.3 35.4 76.3 26.0 2.2 87.3 36.3 49.9 29.2 7.0 12.2 499.1 DAYS WITH PRECIPITATION >=10 2 1 1 3 0 0 4 1 2 1 0 0 15 DAYS WITH PRECIPITATION >= 5 8 5 3 3 3 0 4 3 2 3 1 0 35 DAYS WITH PRECIPITATION >= 1 11 10 5 6 6 1 4 7 3 5 2 3 63 DAYS WITH PRECIPITATION 15 14 11 8 7 3 10 12 8 7 5 9 109 GREATEST DAILY PRECIPITATION 15.0 10.0 16.0 27.0 7.0 2.0 48.0 11.0 35.0 11.0 6.0 4.0 48.0 DAY 14 28 30 24 1 4 24 10 11 2 29 25 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 2 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 4 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 270 225 225 270 225 225 225 225 225 45 270 225 PREVAILING WIND SPEED(KNOTS) 6.8 4.8 7.1 3.6 5.2 5.1 5.8 3.8 4.9 4.2 3.2 4.2 5.2 PREVAILING WIND PERCENT 11.0 9.3 9.7 11.3 15.5 13.3 11.0 12.3 10.7 6.5 3.3 7.1 8.5 CALMS PERCENT OF WIND 68.4 65.0 59.4 72.0 67.1 60.7 65.8 65.8 74.7 80.6 83.3 72.3 69.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 251 155 266 268 252 255 219 213 232 285 262 61 244 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.2 0.7 0.4 0.9 0.8 0.7 0.7 0.6 0.2 0.1 0.5 0.4 WIND STEADINESES (MEAN %) 36.8 10.0 31.8 36.4 50.0 42.1 35.0 46.7 54.5 25.0 16.7 29.4 26.7 WIND SPEED (MEAN KNOTS) 1.9 2.0 2.2 1.1 1.8 1.9 2.0 1.5 1.1 0.8 0.6 1.7 1.5 FASTEST WIND DIRECTION 240 130 240 280 60 340 130 110 270 290 290 60 130 FASTEST WIND SPEED (KNOTS) 19 23 23 12 17 49 68 16 14 23 12 23 68 DAY 13 18 13 28 20 17 24 9 3 2 11 10 DAYS WITH SKY CLEAR (0-2)/8 6 7 7 14 11 18 14 13 14 13 9 6 132 DAYS WITH P.CLOUDY (3-6)/8 9 7 11 3 15 11 9 13 9 11 10 10 118 DAYS WITH CLOUDY (7-8)/8 16 14 13 13 5 1 8 5 7 7 11 15 115 DAYS WITH VISIBILITY =< 2 KM 4 7 3 2 1 0 2 0 0 0 1 4 24 DURATION OF SUNSHINE HOURS 123.9 137.2 196.2 212.0 287.3 327.8 261.9 264.5 208.0 203.6 143.4 116.1 2481.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1014.7 1015.9 1011.1 1008.8 1009.0 1005.8 1002.9 1005.0 1008.0 1013.9 1014.9 1017.5 1010.6 MAX. QFE PRESSURE IN HPA 1026.7 1034.2 1026.5 1020.6 1020.9 1012.0 1011.6 1010.5 1017.5 1031.5 1026.9 1029.1 1034.2 DAY-HOUR 22- 6 22-15 26- 6 1- 3 3- 6 6- 6 20- 3 19- 6 12- 6 9- 6 24- 6 29- 6 MIN. QFE PRESSURE IN HPA 1000.1 995.4 996.0 997.4 994.4 999.3 990.6 998.5 998.8 998.1 1003.3 1006.7 990.6 DAY-HOUR 30-12 14- 3 17-15 21-12 21- 9 22-15 5-15 26-15 1-15 1-12 1-12 23-12 MEAN QNH PRESSURE IN HPA 1018.9 1020.1 1015.3 1013.0 1013.2 1010.0 1007.1 1009.1 1012.2 1018.1 1019.1 1021.7 1014.8 MAX. QNH PRESSURE IN HPA 1030.9 1038.4 1030.7 1024.8 1025.1 1016.2 1015.8 1014.7 1021.7 1035.7 1031.1 1033.3 1038.4 DAY-HOUR 22- 6 22-15 26- 6 1- 3 3- 6 6- 6 20- 3 19- 6 12- 6 9- 6 24- 6 29- 6 MIN. QNH PRESSURE IN HPA 1004.2 999.5 1000.1 1001.5 998.5 1003.4 994.7 1002.6 1002.9 1002.2 1007.4 1010.9 994.7 DAY-HOUR 30-12 14- 3 17-15 21-12 21- 9 22-15 5-15 26-15 1-15 1-12 1-12 23-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1014.6 1016.2 1011.5 1009.1 1009.8 1007.1 1004.1 1005.9 1008.9 1014.4 1015.6 1017.9 1011.2 MAX. QFE PRESSURE IN HPA 1024.7 1031.5 1024.5 1020.6 1020.7 1011.9 1011.6 1010.2 1016.5 1030.4 1024.3 1027.6 1031.5 DAY 22 23 26 1 3 5 20 19 12 9 24 29 MIN. QFE PRESSURE IN HPA 1001.2 995.4 999.1 999.5 995.1 1001.1 995.2 998.9 1002.0 1001.1 1006.3 1006.8 995.1 DAY 30 14 30 21 21 23 6 31 24 1 16 11 MEAN QNH PRESSURE IN HPA 1018.7 1020.3 1015.7 1013.3 1014.0 1011.3 1008.2 1010.0 1013.1 1018.6 1019.8 1022.0 1015.4 MAX. QNH PRESSURE IN HPA 1028.9 1035.7 1028.7 1024.8 1024.9 1016.1 1015.8 1014.4 1020.7 1034.6 1028.5 1031.8 1035.7 DAY 22 23 26 1 3 5 20 19 12 9 24 29 MIN. QNH PRESSURE IN HPA 1005.3 999.5 1003.2 1003.6 999.2 1005.2 999.3 1003.0 1006.1 1005.2 1010.4 1011.0 999.2 DAY 30 14 30 21 21 23 6 31 24 1 16 11 MEAN QFF PRESSURE IN HPA 1019.2 1020.8 1016.0 1013.5 1014.1 1011.3 1008.3 1010.1 1013.2 1018.8 1020.1 1022.4 1015.6 MAX. QFF PRESSURE IN HPA 1029.4 1036.3 1029.1 1025.2 1025.2 1016.1 1015.8 1014.4 1020.9 1035.0 1028.8 1032.2 1036.3 DAY 22 23 26 1 3 5 20 19 12 9 24 29 MIN. QFF PRESSURE IN HPA 1005.8 999.9 1003.5 1003.8 999.3 1005.2 999.3 1003.0 1006.3 1005.4 1010.7 1011.1 999.3 DAY 30 14 30 21 21 23 6 31 24 1 16 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1015.5 1016.8 1012.3 1009.8 1009.9 1007.1 1004.2 1006.1 1009.3 1015.0 1016.2 1018.5 1011.7 MAX. QFE PRESSURE IN HPA 1026.7 1031.7 1026.5 1020.5 1020.9 1012.0 1011.5 1010.5 1017.5 1031.5 1026.9 1029.1 1031.7 DAY 22 22 26 1 3 6 15 19 12 9 24 29 MIN. QFE PRESSURE IN HPA 1001.1 998.7 1000.0 999.1 994.9 1001.4 994.8 1000.3 1002.9 1001.0 1006.6 1008.4 994.8 DAY 30 14 29 21 21 23 5 31 24 1 16 11 MEAN QNH PRESSURE IN HPA 1019.7 1021.0 1016.4 1013.9 1014.1 1011.2 1008.3 1010.3 1013.4 1019.2 1020.3 1022.7 1015.9 MAX. QNH PRESSURE IN HPA 1030.9 1035.9 1030.7 1024.7 1025.1 1016.2 1015.7 1014.7 1021.7 1035.7 1031.1 1033.3 1035.9 DAY 22 22 26 1 3 6 15 19 12 9 24 29 MIN. QNH PRESSURE IN HPA 1005.2 1002.8 1004.1 1003.2 999.0 1005.5 998.9 1004.4 1007.0 1005.1 1010.8 1012.6 998.9 DAY 30 14 29 21 21 23 5 31 24 1 16 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1014.4 1015.8 1011.3 1008.9 1009.2 1005.9 1003.1 1005.2 1007.9 1013.6 1014.6 1017.0 1010.6 MAX. QFE PRESSURE IN HPA 1026.5 1032.3 1025.7 1019.5 1019.7 1011.0 1010.3 1009.1 1016.6 1031.4 1024.3 1027.7 1032.3 DAY 22 22 26 1 3 5 15 14 12 9 24 29 MIN. QFE PRESSURE IN HPA 1000.4 998.8 999.2 998.4 994.4 1000.3 993.4 1000.8 1001.5 999.6 1004.5 1006.8 993.4 DAY 30 14 17 21 21 23 5 26 23 1 1 23 MEAN QNH PRESSURE IN HPA 1018.6 1020.0 1015.5 1013.1 1013.4 1010.0 1007.2 1009.3 1012.1 1017.8 1018.8 1021.2 1014.7 MAX. QNH PRESSURE IN HPA 1030.7 1036.5 1029.9 1023.7 1023.9 1015.2 1014.5 1013.3 1020.8 1035.6 1028.5 1031.9 1036.5 DAY 22 22 26 1 3 5 15 14 12 9 24 29 MIN. QNH PRESSURE IN HPA 1004.5 1002.9 1003.3 1002.5 998.5 1004.4 997.5 1004.9 1005.6 1003.7 1008.6 1011.0 997.5 DAY 30 14 17 21 21 23 5 26 23 1 1 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.1 1015.0 1010.2 1008.1 1008.1 1004.5 1001.8 1003.9 1006.9 1012.9 1013.8 1016.5 1009.6 MAX. QFE PRESSURE IN HPA 1025.7 1032.8 1022.6 1017.9 1019.1 1009.0 1009.6 1008.1 1015.2 1030.1 1024.1 1026.3 1032.8 DAY 22 22 26 1 2 5 20 18 12 9 24 3 MIN. QFE PRESSURE IN HPA 1000.1 998.8 997.4 997.4 995.1 999.3 991.6 998.8 999.3 998.1 1003.3 1006.7 991.6 DAY 30 7 17 21 21 23 5 26 1 1 1 23 MEAN QNH PRESSURE IN HPA 1018.2 1019.2 1014.4 1012.2 1012.3 1008.6 1005.9 1008.0 1011.1 1017.1 1018.0 1020.7 1013.8 MAX. QNH PRESSURE IN HPA 1029.9 1037.0 1026.8 1022.1 1023.3 1013.2 1013.8 1012.3 1019.4 1034.3 1028.3 1030.5 1037.0 DAY 22 22 26 1 2 5 20 18 12 9 24 3 MIN. QNH PRESSURE IN HPA 1004.2 1002.9 1001.5 1001.5 999.2 1003.4 995.7 1002.9 1003.4 1002.2 1007.4 1010.9 995.7 DAY 30 7 17 21 21 23 5 26 1 1 1 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1014.9 1015.7 1010.4 1008.3 1008.2 1004.7 1001.7 1003.9 1007.2 1013.7 1014.4 1017.6 1010.1 MAX. QFE PRESSURE IN HPA 1025.7 1034.2 1021.0 1018.9 1019.1 1009.1 1010.6 1009.2 1015.2 1029.8 1025.2 1027.0 1034.2 DAY 22 22 26 6 2 16 20 9 12 9 20 2 MIN. QFE PRESSURE IN HPA 1003.1 1000.0 996.0 997.5 996.6 999.3 990.6 998.5 998.8 998.3 1003.8 1006.8 990.6 DAY 29 13 17 21 21 22 5 26 1 1 1 20 MEAN QNH PRESSURE IN HPA 1019.1 1019.9 1014.6 1012.5 1012.4 1008.8 1005.8 1008.1 1011.4 1017.9 1018.6 1021.8 1014.2 MAX. QNH PRESSURE IN HPA 1029.9 1038.4 1025.2 1023.1 1023.3 1013.3 1014.8 1013.4 1019.4 1034.0 1029.4 1031.2 1038.4 DAY 22 22 26 6 2 16 20 9 12 9 20 2 MIN. QNH PRESSURE IN HPA 1007.2 1004.1 1000.1 1001.6 1000.7 1003.4 994.7 1002.6 1002.9 1002.4 1007.9 1011.0 994.7 DAY 29 13 17 21 21 22 5 26 1 1 1 20 MEAN QFF PRESSURE IN HPA 1019.5 1020.3 1015.0 1012.7 1012.6 1008.9 1005.9 1008.1 1011.5 1018.1 1018.9 1022.2 1014.5 MAX. QFF PRESSURE IN HPA 1030.4 1039.0 1025.6 1023.5 1023.6 1013.3 1014.8 1013.5 1019.6 1034.4 1029.7 1031.7 1039.0 DAY 22 22 26 6 2 16 20 9 12 9 20 2 MIN. QFF PRESSURE IN HPA 1007.7 1004.6 1000.4 1001.8 1000.8 1003.4 994.7 1002.7 1002.9 1002.5 1008.2 1011.4 994.7 DAY 29 13 17 21 21 22 5 26 1 1 1 20 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 GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 13.2 12.3 17.4 22.5 28.6 29.7 32.8 26.5 21.7 13.1 11.4 19.8 MINIMUN AIR TEMPERATURE (C) 3.0 6.1 5.7 10.4 14.0 19.2 21.6 24.2 19.3 14.6 7.8 5.2 12.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 7 15 31 11 1 0 0 65 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 8 0 1 0 0 0 0 0 0 0 0 0 9 TEMPERATURE RECORDS LOWEST(C) -3.4 1.4 -0.4 4.8 7.5 14.6 16.8 21.0 12.6 7.6 3.2 0.6 -3.4 DAY 5 2 19 11 22 6 13 18 25 26 30 2 MAXIMUM AIR TEMPERATURE (C) 13.6 17.9 16.3 22.0 27.3 33.7 34.5 38.3 31.1 26.5 17.5 16.2 24.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 12 29 28 31 19 9 0 0 130 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.8 28.4 24.0 35.7 39.6 37.7 38.6 42.6 36.6 36.2 29.6 26.8 42.6 DAY 9 20 9 30 27 11 19 24 8 11 25 30 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 11.8 10.6 11.6 13.3 14.5 12.9 14.1 11.8 11.9 9.7 11.0 12.0 MEAN DAILY TEMP. (MDT) (C) 8.3 12.0 11.0 16.2 20.7 26.5 28.0 31.2 25.2 20.6 12.6 10.7 18.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.1 34.7 164.0 218.5 316.6 132.8 35.1 0.0 0.0 904.0 HEATING DEG. DAYS(BASE 18 0C) 299.3 170.0 216.9 63.9 12.6 0.0 0.0 0.0 0.0 18.9 163.6 228.2 1173.3 DEWPOINT (MEAN C) 3.5 5.4 6.9 11.1 13.7 18.6 19.5 21.1 17.6 14.2 8.2 6.5 12.2 MIXING RATIO (G/KG) 5.00 5.73 6.30 8.31 9.99 13.82 14.69 16.39 12.93 10.34 6.85 6.04 9.70 VAPOUR PRESSURE (HPA) 8.10 9.22 10.14 13.32 15.94 21.81 23.11 25.70 20.49 16.51 11.05 9.78 15.43 SATURATION DEF. (HPA) 3.88 6.85 4.80 7.53 12.84 18.52 19.68 25.54 15.54 10.76 4.77 4.36 11.26 RELATIVE HUMIDITY (MEAN %) 72 65 73 70 62 57 57 54 62 66 75 75 66 RELATIVE HUMIDITY (MAX. %) 90 86 92 91 86 78 80 76 86 87 90 90 86 RELATIVE HUMIDITY (MIN. %) 55 48 59 54 47 45 44 38 46 49 61 60 51 RELATIVE HUMIDITY (MEAN% 03UTC) 87 84 90 90 85 78 80 76 85 84 89 86 85 RELATIVE HUMIDITY (MEAN% 09UTC) 61 54 65 59 52 48 47 45 52 55 64 63 55 RELATIVE HUMIDITY (MEAN% 15UTC) 75 67 71 68 60 52 53 50 57 67 78 80 65 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 83.1 34.3 51.5 38.5 31.9 0.0 45.6 4.6 35.2 65.8 47.4 27.7 465.6 DAYS WITH PRECIPITATION >=10 4 2 3 2 1 0 2 0 1 2 1 1 19 DAYS WITH PRECIPITATION >= 5 5 2 3 2 3 0 3 0 2 4 4 3 31 DAYS WITH PRECIPITATION >= 1 7 2 11 5 4 0 7 1 6 6 9 3 61 DAYS WITH PRECIPITATION 10 4 13 10 11 1 9 4 9 7 14 9 101 GREATEST DAILY PRECIPITATION 26.0 23.0 15.0 17.0 11.0 0.0 19.0 4.0 19.0 34.0 12.2 10.0 34.0 DAY 19 4 18 10 21 ** 13 8 28 13 28 5 DAY WITH THUNDER STORM 0 0 0 0 0 1 1 0 0 0 1 0 3 DAYS WITH SNOW OR SLEET 1 0 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 0 0 0 0 1 0 1 0 0 0 0 2 WIND DIRECTION (PREVAILING) 45 45 225 225 270 270 270 225 225 225 225 45 225 PREVAILING WIND SPEED(KNOTS) 6.0 6.5 4.8 5.6 4.2 5.5 3.9 4.3 4.7 4.2 5.7 5.7 4.7 PREVAILING WIND PERCENT 7.1 8.6 8.4 16.7 12.9 20.7 14.2 15.5 12.0 8.4 10.0 9.7 10.6 CALMS PERCENT OF WIND 79.4 61.4 68.4 60.0 59.4 55.3 60.6 58.7 72.7 65.8 54.0 61.3 63.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 59 88 186 231 245 254 235 220 236 279 284 99 234 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.3 0.2 0.7 0.5 1.6 1.1 1.1 0.7 0.3 0.2 0.5 0.4 WIND STEADINESES (MEAN %) 55.6 14.3 14.3 38.9 29.4 69.6 68.7 57.9 63.6 20.0 9.5 22.7 23.5 WIND SPEED (MEAN KNOTS) 0.9 2.1 1.4 1.8 1.7 2.3 1.6 1.9 1.1 1.5 2.1 2.2 1.7 FASTEST WIND DIRECTION 230 240 230 240 230 320 10 360 230 190 270 90 360 FASTEST WIND SPEED (KNOTS) 14 14 14 14 19 14 16 29 10 19 16 17 29 DAY 9 9 17 6 14 12 27 7 4 13 1 28 DAYS WITH SKY CLEAR (0-2)/8 12 10 8 5 13 18 17 23 16 17 10 14 163 DAYS WITH P.CLOUDY (3-6)/8 5 9 9 14 9 10 11 6 7 10 8 8 106 DAYS WITH CLOUDY (7-8)/8 14 9 14 11 9 2 3 2 7 4 12 9 96 DAYS WITH VISIBILITY =< 2 KM 1 2 3 3 0 0 0 0 1 2 1 2 15 DURATION OF SUNSHINE HOURS 154.7 163.3 168.9 187.9 236.0 313.8 309.7 304.1 224.7 228.7 136.8 162.0 2590.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 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 1016.2 1010.4 1012.5 1011.2 1009.3 1004.7 1003.0 1002.7 1007.4 1011.3 1015.1 1017.2 1010.1 MAX. QFE PRESSURE IN HPA 1036.5 1023.2 1027.0 1020.5 1018.4 1015.3 1009.7 1012.0 1016.1 1022.5 1029.1 1030.0 1036.5 DAY-HOUR 2- 6 11- 6 18-15 22- 6 9- 3 17- 3 13- 3 20- 6 23-15 26- 6 30-15 24- 6 MIN. QFE PRESSURE IN HPA 998.9 990.0 998.1 997.0 999.7 990.3 996.1 996.4 998.0 1002.8 1000.6 1003.5 990.0 DAY-HOUR 9- 3 20-15 21-15 13-15 18-15 24-15 21-15 13- 3 15-12 11- 3 25- 9 15-12 MEAN QNH PRESSURE IN HPA 1020.4 1014.6 1016.7 1015.4 1013.5 1008.8 1007.1 1006.8 1011.6 1015.5 1019.3 1021.4 1014.3 MAX. QNH PRESSURE IN HPA 1040.8 1027.4 1031.2 1024.7 1022.6 1019.5 1013.9 1016.2 1020.3 1026.7 1033.3 1034.2 1040.8 DAY-HOUR 2- 6 11- 6 18-15 22- 6 9- 3 17- 3 13- 3 20- 6 23-15 26- 6 30-15 24- 6 MIN. QNH PRESSURE IN HPA 1003.0 994.1 1002.2 1001.1 1003.8 994.4 1000.2 1000.5 1002.1 1006.9 1004.7 1007.6 994.1 DAY-HOUR 9- 3 20-15 21-15 13-15 18-15 24-15 21-15 13- 3 15-12 11- 3 25- 9 15-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.5 1010.7 1012.7 1011.5 1010.6 1006.3 1004.0 1003.5 1008.3 1011.4 1015.3 1017.6 1010.7 MAX. QFE PRESSURE IN HPA 1036.3 1022.1 1022.3 1020.0 1018.4 1015.3 1009.7 1011.5 1014.1 1021.7 1026.8 1028.4 1036.3 DAY 2 11 19 23 9 17 13 20 5 26 30 1 MIN. QFE PRESSURE IN HPA 998.9 997.1 999.0 998.3 1003.5 994.8 999.4 996.4 1001.7 1002.8 1001.2 1005.4 994.8 DAY 9 20 21 14 14 25 31 13 15 11 25 15 MEAN QNH PRESSURE IN HPA 1020.7 1014.9 1016.8 1015.7 1014.7 1010.5 1008.2 1007.7 1012.5 1015.6 1019.5 1021.8 1014.9 MAX. QNH PRESSURE IN HPA 1040.6 1026.3 1026.5 1024.2 1022.6 1019.5 1013.9 1015.7 1018.3 1025.9 1031.0 1032.6 1040.6 DAY 2 11 19 23 9 17 13 20 5 26 30 1 MIN. QNH PRESSURE IN HPA 1003.0 1001.2 1003.1 1002.4 1007.6 998.9 1003.5 1000.5 1005.8 1006.9 1005.3 1009.5 998.9 DAY 9 20 21 14 14 25 31 13 15 11 25 15 MEAN QFF PRESSURE IN HPA 1021.1 1015.2 1017.2 1015.9 1014.9 1010.6 1008.3 1007.7 1012.6 1015.8 1019.8 1022.2 1015.1 MAX. QFF PRESSURE IN HPA 1041.1 1026.7 1027.0 1024.5 1022.9 1019.6 1014.0 1015.7 1018.4 1026.3 1031.5 1033.1 1041.1 DAY 2 11 19 23 9 17 13 20 5 26 30 1 MIN. QFF PRESSURE IN HPA 1003.3 1001.5 1003.4 1002.6 1007.8 998.9 1003.6 1000.5 1005.9 1007.1 1005.6 1009.9 998.9 DAY 9 20 21 14 14 25 31 13 16 11 25 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1017.3 1011.5 1013.6 1012.2 1010.6 1005.7 1004.2 1004.0 1008.7 1012.4 1015.9 1018.4 1011.2 MAX. QFE PRESSURE IN HPA 1036.5 1023.2 1022.9 1020.5 1018.0 1014.9 1008.9 1012.0 1015.3 1022.5 1027.9 1030.0 1036.5 DAY 2 11 18 22 9 16 13 20 28 26 30 24 MIN. QFE PRESSURE IN HPA 1002.4 995.2 1001.2 1001.5 1002.9 994.1 1000.3 998.6 1001.1 1003.4 1001.4 1006.5 994.1 DAY 9 20 21 13 18 25 22 6 15 11 25 14 MEAN QNH PRESSURE IN HPA 1021.5 1015.7 1017.7 1016.4 1014.8 1009.9 1008.3 1008.1 1012.9 1016.6 1020.1 1022.6 1015.4 MAX. QNH PRESSURE IN HPA 1040.8 1027.4 1027.1 1024.7 1022.2 1019.1 1013.1 1016.2 1019.5 1026.7 1032.1 1034.2 1040.8 DAY 2 11 18 22 9 16 13 20 28 26 30 24 MIN. QNH PRESSURE IN HPA 1006.5 999.3 1005.3 1005.6 1007.0 998.2 1004.4 1002.7 1005.2 1007.5 1005.5 1010.7 998.2 DAY 9 20 21 13 18 25 22 6 15 11 25 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1016.2 1010.4 1012.8 1011.5 1009.3 1004.7 1003.1 1002.8 1007.3 1011.4 1014.7 1017.1 1010.1 MAX. QFE PRESSURE IN HPA 1034.5 1022.6 1024.5 1019.9 1017.1 1014.4 1007.4 1010.1 1015.5 1020.8 1027.7 1030.0 1034.5 DAY 2 11 18 22 9 16 18 20 23 25 30 24 MIN. QFE PRESSURE IN HPA 1001.6 992.1 998.4 1000.1 1001.4 992.5 999.3 997.8 999.1 1005.4 1000.6 1004.5 992.1 DAY 9 20 21 13 18 25 30 6 15 18 25 15 MEAN QNH PRESSURE IN HPA 1020.3 1014.6 1017.0 1015.7 1013.5 1008.9 1007.2 1006.9 1011.5 1015.6 1018.9 1021.3 1014.3 MAX. QNH PRESSURE IN HPA 1038.7 1026.8 1028.7 1024.1 1021.3 1018.6 1011.6 1014.3 1019.7 1025.0 1031.9 1034.2 1038.7 DAY 2 11 18 22 9 16 18 20 23 25 30 24 MIN. QNH PRESSURE IN HPA 1005.7 996.2 1002.5 1004.2 1005.5 996.6 1003.4 1001.9 1003.2 1009.5 1004.7 1008.6 996.2 DAY 9 20 21 13 18 25 30 6 15 18 25 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1009.5 1011.6 1010.5 1008.1 1003.3 1001.8 1001.5 1006.2 1010.5 1014.4 1016.2 1009.1 MAX. QFE PRESSURE IN HPA 1032.0 1021.7 1025.8 1019.1 1015.7 1013.9 1006.3 1008.4 1015.9 1020.8 1027.9 1029.1 1032.0 DAY 2 11 18 22 9 16 27 20 23 25 30 24 MIN. QFE PRESSURE IN HPA 1000.6 990.6 998.2 998.3 1001.1 991.8 998.1 996.6 998.0 1004.5 1000.8 1003.5 990.6 DAY 9 20 21 13 17 24 30 6 15 18 25 15 MEAN QNH PRESSURE IN HPA 1019.5 1013.7 1015.8 1014.7 1012.2 1007.4 1006.0 1005.6 1010.4 1014.7 1018.5 1020.4 1013.2 MAX. QNH PRESSURE IN HPA 1036.2 1025.9 1030.0 1023.3 1019.9 1018.1 1010.4 1012.6 1020.1 1025.0 1032.1 1033.3 1036.2 DAY 2 11 18 22 9 16 27 20 23 25 30 24 MIN. QNH PRESSURE IN HPA 1004.7 994.7 1002.3 1002.4 1005.2 995.9 1002.2 1000.7 1002.1 1008.6 1004.9 1007.6 994.7 DAY 9 20 21 13 17 24 30 6 15 18 25 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1015.9 1010.0 1011.9 1010.5 1008.0 1003.4 1001.9 1001.5 1006.6 1010.9 1015.4 1016.9 1009.4 MAX. QFE PRESSURE IN HPA 1031.8 1022.4 1027.0 1019.1 1015.7 1014.7 1006.3 1008.1 1016.1 1021.6 1029.1 1029.7 1031.8 DAY 1 11 18 22 9 16 18 20 23 25 30 24 MIN. QFE PRESSURE IN HPA 1002.2 990.0 998.1 997.0 999.7 990.3 996.1 997.2 999.8 1005.1 1002.6 1003.9 990.0 DAY 9 20 21 13 18 24 21 6 15 18 25 15 MEAN QNH PRESSURE IN HPA 1020.1 1014.2 1016.0 1014.7 1012.2 1007.6 1006.0 1005.7 1010.8 1015.0 1019.6 1021.1 1013.6 MAX. QNH PRESSURE IN HPA 1036.0 1026.6 1031.2 1023.3 1019.9 1018.9 1010.4 1012.3 1020.3 1025.8 1033.3 1033.9 1036.0 DAY 1 11 18 22 9 16 18 20 23 25 30 24 MIN. QNH PRESSURE IN HPA 1006.3 994.1 1002.2 1001.1 1003.8 994.4 1000.2 1001.3 1003.9 1009.2 1006.7 1008.0 994.1 DAY 9 20 21 13 18 24 21 6 15 18 25 15 MEAN QFF PRESSURE IN HPA 1020.5 1014.5 1016.4 1015.0 1012.4 1007.7 1006.1 1005.7 1010.9 1015.2 1019.9 1021.5 1013.8 MAX. QFF PRESSURE IN HPA 1036.5 1027.0 1031.7 1023.6 1020.1 1019.0 1010.6 1012.3 1020.5 1026.1 1033.8 1034.3 1036.5 DAY 1 11 18 22 9 16 27 20 23 25 30 24 MIN. QFF PRESSURE IN HPA 1006.6 994.3 1002.4 1001.3 1004.0 994.4 1000.3 1001.3 1004.0 1009.4 1007.0 1008.4 994.3 DAY 9 20 21 13 18 24 21 6 15 18 25 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION GONBADE KAWOOS (99240) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 55 10 E DATA PROCESSING CENTER ELEVATION 37.2 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.3 10.1 11.5 21.8 24.8 28.2 32.1 31.8 27.2 19.5 13.4 11.3 20.0 MINIMUN AIR TEMPERATURE (C) 2.9 4.4 4.8 12.3 15.9 19.3 23.1 24.1 22.1 13.7 7.3 6.2 13.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 7 28 30 20 0 0 0 86 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 8 1 0 0 0 0 0 0 0 0 0 0 9 TEMPERATURE RECORDS LOWEST(C) -4.0 0.0 0.2 6.2 10.0 12.6 20.6 20.0 17.0 8.0 1.6 1.0 -4.0 DAY 15 9 13 3 11 14 27 18 26 16 28 29 MAXIMUM AIR TEMPERATURE (C) 12.1 14.0 15.5 27.2 29.8 33.1 37.1 36.6 31.2 23.6 17.7 15.3 24.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 9 16 23 31 29 22 0 0 0 130 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.5 23.6 24.6 35.8 36.6 41.0 41.8 43.8 37.4 28.6 22.6 24.0 43.8 DAY 26 23 7 10 3 5 31 1 7 11 3 30 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 9.6 10.7 14.9 13.9 13.8 14.0 12.5 9.1 9.9 10.4 9.1 11.4 MEAN DAILY TEMP. (MDT) (C) 7.5 9.2 10.1 19.8 22.8 26.2 30.1 30.3 26.6 18.7 12.5 10.8 18.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 23.3 70.7 159.9 281.8 289.6 169.3 2.0 0.0 0.0 996.7 HEATING DEG. DAYS(BASE 18 0C) 325.1 255.1 243.7 18.8 0.2 0.0 0.0 0.0 0.0 16.0 167.4 224.1 1250.3 DEWPOINT (MEAN C) 3.1 4.8 6.1 13.2 16.3 15.4 18.3 21.0 20.1 12.7 6.9 7.2 12.1 MIXING RATIO (G/KG) 4.82 5.39 6.00 9.78 11.83 11.21 13.53 16.01 15.10 9.26 6.31 6.37 9.64 VAPOUR PRESSURE (HPA) 7.79 8.72 9.67 15.57 18.78 17.78 21.36 25.17 23.84 14.88 10.23 10.29 15.34 SATURATION DEF. (HPA) 3.70 4.15 4.55 11.98 13.91 22.16 27.69 23.44 12.96 8.37 5.71 3.48 11.84 RELATIVE HUMIDITY (MEAN %) 74 73 73 62 63 50 47 56 67 67 67 79 65 RELATIVE HUMIDITY (MAX. %) 87 87 91 86 86 71 69 79 88 89 88 93 85 RELATIVE HUMIDITY (MIN. %) 61 59 58 46 50 37 34 42 53 52 51 65 51 RELATIVE HUMIDITY (MEAN% 03UTC) 86 86 90 85 85 70 69 79 88 88 87 91 84 RELATIVE HUMIDITY (MEAN% 09UTC) 66 66 62 52 53 41 38 48 58 57 57 68 56 RELATIVE HUMIDITY (MEAN% 15UTC) 74 74 76 60 62 45 40 50 66 66 66 82 63 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 53.7 80.5 74.8 1.0 10.2 29.8 10.1 58.0 99.4 30.7 9.3 57.2 514.7 DAYS WITH PRECIPITATION >=10 2 4 3 0 0 1 1 1 2 0 0 3 17 DAYS WITH PRECIPITATION >= 5 4 7 5 0 1 2 1 2 2 2 1 3 30 DAYS WITH PRECIPITATION >= 1 7 10 11 1 2 3 1 2 4 9 2 8 60 DAYS WITH PRECIPITATION 9 12 15 2 5 6 4 5 6 12 3 12 91 GREATEST DAILY PRECIPITATION 15.0 18.0 24.0 1.0 7.0 21.0 10.1 50.2 64.0 7.0 7.0 19.0 64.0 DAY 7 14 3 11 10