STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.3 11.9 16.5 23.8 30.6 34.9 36.3 36.1 32.4 25.4 19.4 12.4 24.4 MINIMUN AIR TEMPERATURE (C) 7.0 3.3 7.5 12.7 15.9 21.0 23.5 23.5 19.5 12.7 11.0 6.1 13.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 15 28 30 10 0 0 0 87 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 6 5 0 0 0 0 0 0 0 0 0 11 TEMPERATURE RECORDS LOWEST(C) 1.5 -3.0 -1.0 7.0 7.5 17.0 18.5 20.5 16.0 7.5 6.0 0.5 -3.0 DAY 9 7 1 9 7 10 29 1 20 24 30 6 MAXIMUM AIR TEMPERATURE (C) 18.1 17.7 22.3 29.8 36.5 41.6 42.9 42.4 39.6 32.5 25.0 17.0 30.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 16 31 30 31 31 30 23 3 0 195 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 22.5 29.0 34.4 43.2 44.8 45.5 44.5 43.0 38.5 30.5 25.0 45.5 DAY 28 14 19 19 31 27 8 23 4 1 2 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 14.4 14.8 17.1 20.6 20.6 19.4 18.9 20.1 19.8 14.0 10.9 16.8 MEAN DAILY TEMP. (MDT) (C) 12.5 10.5 14.9 21.2 26.2 31.3 33.2 32.9 29.6 22.6 18.0 11.6 22.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.5 32.2 163.5 299.3 378.3 369.5 257.0 68.4 2.0 0.0 1570.8 HEATING DEG. DAYS(BASE 18 0C) 169.1 209.9 111.4 3.0 0.0 0.0 0.0 0.0 0.0 1.5 22.9 199.5 717.2 DEWPOINT (MEAN C) 6.6 1.1 4.3 2.1 4.2 3.3 5.6 6.9 4.3 -0.4 6.6 4.7 4.1 MIXING RATIO (G/KG) 6.70 4.65 5.89 5.13 5.86 5.48 6.43 7.13 6.02 4.15 6.82 5.95 5.85 VAPOUR PRESSURE (HPA) 9.95 6.91 8.73 7.59 8.63 8.04 9.40 10.43 8.85 6.17 10.13 8.85 8.64 SATURATION DEF. (HPA) 5.94 7.77 11.47 23.57 37.91 50.92 53.93 51.66 42.70 28.71 13.39 6.04 27.83 RELATIVE HUMIDITY (MEAN %) 67 52 49 30 22 16 17 19 20 21 49 64 36 RELATIVE HUMIDITY (MAX. %) 88 80 77 60 38 31 31 34 38 39 70 86 56 RELATIVE HUMIDITY (MIN. %) 47 32 31 15 14 9 10 11 10 12 32 45 22 RELATIVE HUMIDITY (MEAN% 03UTC) 87 79 75 60 38 31 31 32 37 39 69 84 55 RELATIVE HUMIDITY (MEAN% 09UTC) 57 40 39 19 16 12 13 13 14 16 37 52 27 RELATIVE HUMIDITY (MEAN% 15UTC) 63 48 40 21 17 11 12 16 14 17 46 64 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 137.0 54.0 27.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 58.0 116.0 393.0 DAYS WITH PRECIPITATION >=10 4 2 1 0 0 0 0 0 0 0 2 3 12 DAYS WITH PRECIPITATION >= 5 4 3 2 0 0 0 0 0 0 0 3 8 20 DAYS WITH PRECIPITATION >= 1 7 3 7 1 0 0 0 0 0 0 3 9 30 DAYS WITH PRECIPITATION 7 3 7 1 0 0 0 0 0 0 3 9 30 GREATEST DAILY PRECIPITATION 80.0 35.0 13.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 38.0 40.0 80.0 DAY 2 1 7 24 ** ** ** ** ** ** 13 19 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 1 1 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 2 4 2 5 3 15 3 1 2 0 1 38 WIND DIRECTION (PREVAILING) 135 270 135 270 315 270 270 270 270 270 270 135 270 PREVAILING WIND SPEED(KNOTS) 9.9 10.4 8.7 10.8 10.6 11.0 10.9 11.1 10.8 10.2 10.3 9.8 10.7 PREVAILING WIND PERCENT 15.5 15.0 9.0 21.3 20.6 26.0 25.8 12.9 18.7 20.6 11.3 17.4 15.2 CALMS PERCENT OF WIND 74.8 66.4 76.8 60.0 47.7 56.0 54.8 58.1 71.3 66.5 73.3 72.9 64.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 134 234 236 255 286 272 264 223 272 269 218 134 255 VECTOR WIND MAGNITUDE(KNOTS) 1.7 1.9 0.7 2.6 3.3 4.2 3.7 1.4 2.7 3.2 1.1 1.6 1.8 WIND STEADINESES (MEAN %) 70.8 54.3 30.4 63.4 61.1 91.3 78.7 29.8 84.4 91.4 39.3 59.3 48.6 WIND SPEED (MEAN KNOTS) 2.4 3.5 2.3 4.1 5.4 4.6 4.7 4.7 3.2 3.5 2.8 2.7 3.7 FASTEST WIND DIRECTION 100 150 270 270 300 280 280 270 300 270 120 240 150 FASTEST WIND SPEED (KNOTS) 19 29 19 29 23 19 19 29 19 19 25 19 29 DAY 21 26 25 6 21 9 2 6 14 15 11 5 DAYS WITH SKY CLEAR (0-2)/8 9 16 11 18 15 30 28 26 30 29 14 11 237 DAYS WITH P.CLOUDY (3-6)/8 14 8 13 8 14 0 3 5 0 2 14 10 91 DAYS WITH CLOUDY (7-8)/8 8 4 7 4 2 0 0 0 0 0 2 10 37 DAYS WITH VISIBILITY =< 2 KM 7 4 1 0 0 0 0 1 0 0 2 7 22 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.0 932.0 932.4 928.9 926.4 921.2 919.2 921.6 926.0 931.5 934.6 935.1 928.6 MAX. QFE PRESSURE IN HPA 939.3 937.8 939.8 933.7 931.6 925.0 923.2 926.8 933.0 936.6 938.1 940.0 940.0 DAY-HOUR 13- 6 19- 9 9- 9 21- 9 12- 9 9- 6 3- 6 30- 6 30- 6 26- 6 12- 6 31- 6 MIN. QFE PRESSURE IN HPA 929.2 925.2 924.1 923.7 921.7 916.9 915.3 916.6 920.4 926.5 929.6 926.8 915.3 DAY-HOUR 2-12 26-12 31-15 19-15 29-12 28-15 10-15 7-12 5-15 9-12 10-15 19-12 MEAN QNH PRESSURE IN HPA 1015.1 1012.9 1013.4 1009.6 1006.9 1001.4 999.3 1001.9 1006.6 1012.4 1015.7 1016.2 1009.3 MAX. QNH PRESSURE IN HPA 1020.8 1019.2 1021.3 1014.8 1012.5 1005.5 1003.6 1007.4 1014.0 1017.9 1019.5 1021.5 1021.5 DAY-HOUR 13- 6 19- 9 9- 9 21- 9 12- 9 9- 6 3- 6 30- 6 30- 6 26- 6 12- 6 31- 6 MIN. QNH PRESSURE IN HPA 1010.0 1005.7 1004.5 1004.1 1001.9 996.8 995.1 996.5 1000.6 1007.1 1010.4 1007.4 995.1 DAY-HOUR 2-12 26-12 31-15 19-15 29-12 28-15 10-15 7-12 5-15 9-12 10-15 19-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 934.1 931.7 932.4 928.9 926.5 921.4 919.5 922.0 926.1 931.6 934.6 935.0 928.6 MAX. QFE PRESSURE IN HPA 938.8 935.9 938.2 931.0 930.4 924.0 922.3 926.1 931.1 935.3 936.9 938.7 938.8 DAY 14 19 10 6 12 8 3 30 30 26 18 8 MIN. QFE PRESSURE IN HPA 931.3 925.9 925.6 926.7 922.7 918.4 917.1 917.9 921.9 927.4 930.8 927.5 917.1 DAY 17 16 24 20 29 30 26 7 6 8 7 19 MEAN QNH PRESSURE IN HPA 1015.2 1012.6 1013.4 1009.7 1007.1 1001.6 999.6 1002.2 1006.7 1012.5 1015.8 1016.1 1009.4 MAX. QNH PRESSURE IN HPA 1020.2 1017.1 1019.6 1011.9 1011.3 1004.4 1002.6 1006.7 1012.0 1016.5 1018.2 1020.1 1020.2 DAY 14 19 10 6 12 8 3 30 30 26 18 8 MIN. QNH PRESSURE IN HPA 1012.2 1006.4 1006.1 1007.3 1003.0 998.4 997.0 997.9 1002.2 1008.0 1011.7 1008.2 997.0 DAY 17 16 24 20 29 30 26 7 6 8 7 19 MEAN QFF PRESSURE IN HPA 1014.7 1012.8 1012.3 1006.7 1002.4 995.8 993.4 996.0 1001.6 1009.4 1013.9 1016.1 1006.2 MAX. QFF PRESSURE IN HPA 1019.4 1018.6 1020.5 1010.4 1006.6 998.8 997.0 1000.4 1007.5 1014.4 1016.8 1021.9 1021.9 DAY 14 19 5 6 9 10 3 14 30 26 17 31 MIN. QFF PRESSURE IN HPA 1010.1 1005.1 1002.2 1003.5 997.5 991.9 990.3 991.0 996.2 1004.5 1010.1 1006.4 990.3 DAY 29 26 24 20 30 28 11 8 6 8 7 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.2 932.8 933.6 930.0 927.5 922.2 920.2 922.8 927.3 932.7 935.9 936.2 929.7 MAX. QFE PRESSURE IN HPA 939.3 937.7 939.3 933.0 931.4 925.0 923.2 926.8 933.0 936.6 938.1 940.0 940.0 DAY 13 19 9 21 12 9 3 30 30 26 12 31 MIN. QFE PRESSURE IN HPA 930.0 925.7 926.6 927.4 923.4 919.2 917.5 918.1 923.0 928.7 932.4 928.1 917.5 DAY 2 26 24 19 29 30 10 7 6 8 7 19 MEAN QNH PRESSURE IN HPA 1016.3 1013.8 1014.7 1010.8 1008.1 1002.4 1000.3 1003.1 1007.9 1013.8 1017.1 1017.5 1010.5 MAX. QNH PRESSURE IN HPA 1020.8 1019.1 1020.8 1014.0 1012.3 1005.5 1003.6 1007.4 1014.0 1017.9 1019.5 1021.5 1021.5 DAY 13 19 9 21 12 9 3 30 30 26 12 31 MIN. QNH PRESSURE IN HPA 1010.8 1006.2 1007.2 1008.0 1003.8 999.3 997.5 998.1 1003.3 1009.4 1013.4 1008.8 997.5 DAY 2 26 24 19 29 30 10 7 6 8 7 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 934.6 932.8 933.3 929.6 927.1 921.7 919.7 922.2 926.6 932.0 935.1 935.3 929.2 MAX. QFE PRESSURE IN HPA 938.9 937.8 939.8 933.7 931.6 924.5 923.1 926.0 932.2 936.3 937.7 939.3 939.8 DAY 13 19 9 21 12 6 3 30 30 26 17 8 MIN. QFE PRESSURE IN HPA 930.5 926.4 926.3 926.6 922.7 918.5 916.9 917.7 922.2 927.9 931.6 927.7 916.9 DAY 2 26 24 19 29 28 19 7 6 9 10 19 MEAN QNH PRESSURE IN HPA 1015.7 1013.8 1014.3 1010.4 1007.7 1001.9 999.8 1002.5 1007.2 1013.0 1016.3 1016.5 1009.9 MAX. QNH PRESSURE IN HPA 1020.4 1019.2 1021.3 1014.8 1012.5 1004.9 1003.4 1006.5 1013.2 1017.6 1019.1 1020.8 1021.3 DAY 13 19 9 21 12 6 3 30 30 26 17 8 MIN. QNH PRESSURE IN HPA 1011.4 1007.0 1006.9 1007.2 1003.0 998.5 996.8 997.7 1002.5 1008.6 1012.5 1008.4 996.8 DAY 2 26 24 19 29 28 19 7 6 9 10 19 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 933.0 931.3 931.6 928.3 925.7 920.6 918.6 920.8 925.2 930.5 933.5 934.2 927.8 MAX. QFE PRESSURE IN HPA 937.2 935.9 938.5 932.1 930.3 923.8 921.6 924.6 930.6 934.0 936.1 937.8 938.5 DAY 13 19 9 21 12 6 2 30 30 26 17 29 MIN. QFE PRESSURE IN HPA 929.2 925.2 924.5 924.4 921.7 917.4 916.1 916.6 921.0 926.5 929.9 926.8 916.1 DAY 2 26 24 19 29 28 10 7 5 9 10 19 MEAN QNH PRESSURE IN HPA 1014.0 1012.2 1012.5 1009.0 1006.2 1000.8 998.7 1001.0 1005.7 1011.3 1014.6 1015.3 1008.4 MAX. QNH PRESSURE IN HPA 1018.5 1017.1 1019.9 1013.1 1011.2 1004.2 1001.8 1005.1 1011.5 1015.1 1017.4 1019.2 1019.9 DAY 13 19 9 21 12 6 2 30 30 26 17 29 MIN. QNH PRESSURE IN HPA 1010.0 1005.7 1004.9 1004.8 1001.9 997.3 996.0 996.5 1001.2 1007.1 1010.7 1007.4 996.0 DAY 2 26 24 19 29 28 10 7 5 9 10 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 933.4 931.4 931.4 927.7 925.1 920.0 918.1 920.4 924.9 930.7 933.9 934.7 927.7 MAX. QFE PRESSURE IN HPA 937.6 935.4 938.4 932.6 929.8 923.4 921.5 925.4 930.2 934.6 936.6 939.0 939.0 DAY 13 19 9 21 12 6 2 30 30 26 17 29 MIN. QFE PRESSURE IN HPA 929.8 925.9 924.1 923.7 921.7 916.9 915.3 916.6 920.4 926.9 929.6 927.6 915.3 DAY 2 26 31 19 29 28 10 7 5 9 10 18 MEAN QNH PRESSURE IN HPA 1014.4 1012.4 1012.3 1008.4 1005.6 1000.1 998.1 1000.6 1005.4 1011.6 1015.0 1015.9 1008.3 MAX. QNH PRESSURE IN HPA 1019.0 1016.6 1019.8 1013.6 1010.6 1003.8 1001.7 1005.9 1011.0 1015.8 1017.9 1020.5 1020.5 DAY 13 19 9 21 12 6 2 30 30 26 17 29 MIN. QNH PRESSURE IN HPA 1010.6 1006.4 1004.5 1004.1 1001.9 996.8 995.1 996.5 1000.6 1007.5 1010.4 1008.3 995.1 DAY 2 26 31 19 29 28 10 7 5 9 10 18 MEAN QFF PRESSURE IN HPA 1013.9 1012.5 1011.2 1005.5 1000.9 994.4 991.9 994.3 1000.3 1008.5 1013.1 1015.9 1005.2 MAX. QFF PRESSURE IN HPA 1017.9 1017.7 1020.5 1009.4 1006.2 998.0 996.0 999.7 1006.4 1013.7 1016.4 1022.1 1022.1 DAY 13 7 9 21 12 6 2 30 30 26 17 29 MIN. QFF PRESSURE IN HPA 1009.7 1004.9 1001.9 1000.2 996.4 990.1 988.5 989.6 995.0 1004.1 1008.2 1006.9 988.5 DAY 31 26 24 19 29 28 10 7 5 9 10 18 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.6 12.5 15.5 21.4 30.0 33.5 37.7 35.8 32.4 27.8 16.5 11.5 23.8 MINIMUN AIR TEMPERATURE (C) 3.4 5.3 7.5 12.7 18.4 20.2 25.2 24.4 20.3 16.4 10.2 5.1 14.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 11 11 31 31 14 1 0 0 99 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 5 2 0 0 0 0 0 0 0 0 0 0 7 TEMPERATURE RECORDS LOWEST(C) -3.0 0.0 3.5 8.0 9.0 18.0 22.0 21.0 17.0 10.0 4.0 1.0 -3.0 DAY 22 3 14 6 6 1 3 11 12 25 15 4 MAXIMUM AIR TEMPERATURE (C) 17.5 17.3 20.6 26.5 35.8 40.0 44.1 42.8 39.2 34.4 21.3 16.7 29.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 28 30 31 31 30 28 3 0 182 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.5 22.5 26.0 30.0 43.0 43.0 46.0 46.0 41.0 39.0 30.0 20.0 46.0 DAY 5 28 29 18 28 30 19 2 4 3 1 24 DIF. BETWEEN (MAX.-MIN.) (C) 14.1 12.0 13.1 13.8 17.4 19.8 18.9 18.4 18.9 18.0 11.1 11.6 15.6 MEAN DAILY TEMP. (MDT) (C) 10.5 11.3 14.0 19.6 27.1 30.1 34.6 33.6 29.7 25.4 15.7 10.9 21.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 5.3 192.7 273.2 422.8 390.0 262.2 141.0 3.0 0.0 1690.3 HEATING DEG. DAYS(BASE 18 0C) 233.3 187.4 125.5 6.3 0.0 0.0 0.0 0.0 0.0 0.0 84.5 219.5 856.4 DEWPOINT (MEAN C) 1.5 4.6 6.4 11.3 6.9 5.6 7.6 12.0 9.6 5.1 8.3 4.4 6.9 MIXING RATIO (G/KG) 4.71 5.82 6.65 9.21 7.00 6.64 7.38 10.24 8.95 6.20 7.63 5.79 7.19 VAPOUR PRESSURE (HPA) 7.02 8.65 9.84 13.56 10.32 9.72 10.78 14.91 13.14 9.20 11.30 8.62 10.59 SATURATION DEF. (HPA) 7.33 6.36 8.44 13.00 34.97 44.89 57.20 46.59 37.91 30.42 8.28 5.39 25.07 RELATIVE HUMIDITY (MEAN %) 54 62 59 56 28 20 18 28 29 28 62 66 43 RELATIVE HUMIDITY (MAX. %) 84 87 83 82 53 37 34 52 51 53 82 88 66 RELATIVE HUMIDITY (MIN. %) 32 42 41 39 16 12 11 15 17 14 45 45 27 RELATIVE HUMIDITY (MEAN% 03UTC) 83 85 82 81 52 38 34 52 51 52 79 86 65 RELATIVE HUMIDITY (MEAN% 09UTC) 39 51 45 45 20 15 13 18 19 18 53 51 32 RELATIVE HUMIDITY (MEAN% 15UTC) 52 58 56 51 22 15 15 27 28 24 64 71 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 9.0 53.0 130.8 97.3 21.0 0.0 0.0 18.0 6.0 1.0 135.4 93.0 564.5 DAYS WITH PRECIPITATION >=10 0 3 4 4 1 0 0 0 0 0 6 2 20 DAYS WITH PRECIPITATION >= 5 1 4 8 5 1 0 0 1 1 0 7 4 32 DAYS WITH PRECIPITATION >= 1 3 8 9 9 3 0 0 4 1 1 12 7 57 DAYS WITH PRECIPITATION 3 8 10 11 3 0 0 4 1 1 12 7 60 GREATEST DAILY PRECIPITATION 6.0 16.0 44.0 40.0 17.0 0.0 0.0 7.0 6.0 1.0 39.0 55.0 55.0 DAY 31 10 8 11 4 ** ** 27 7 9 30 20 DAY WITH THUNDER STORM 0 0 3 1 1 0 0 5 1 0 4 0 15 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 0 1 0 1 8 10 1 3 1 0 0 27 WIND DIRECTION (PREVAILING) 135 135 270 135 270 270 270 270 270 270 135 135 270 PREVAILING WIND SPEED(KNOTS) 9.3 11.0 11.1 11.2 10.3 12.5 13.2 12.5 12.2 10.6 10.8 9.9 11.6 PREVAILING WIND PERCENT 3.9 10.0 10.3 13.3 14.2 30.0 18.7 18.7 23.3 25.2 21.3 19.4 14.7 CALMS PERCENT OF WIND 89.7 67.1 63.2 68.0 57.4 51.3 52.9 56.1 53.3 58.7 56.7 67.1 61.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 180 156 189 195 265 274 258 272 243 268 120 147 245 VECTOR WIND MAGNITUDE(KNOTS) 0.2 1.3 0.5 1.0 1.7 5.4 3.7 3.4 2.6 3.1 3.1 1.6 1.5 WIND STEADINESES (MEAN %) 18.2 34.2 12.5 27.8 37.8 90.0 64.9 59.6 47.3 72.1 63.3 48.5 34.1 WIND SPEED (MEAN KNOTS) 1.1 3.8 4.0 3.6 4.5 6.0 5.7 5.7 5.5 4.3 4.9 3.3 4.4 FASTEST WIND DIRECTION 330 90 110 150 100 330 270 350 270 330 100 180 350 FASTEST WIND SPEED (KNOTS) 19 21 19 29 19 19 25 60 29 23 25 19 60 DAY 20 14 15 22 4 1 26 28 30 8 4 20 DAYS WITH SKY CLEAR (0-2)/8 22 14 13 9 15 29 30 26 29 28 13 20 248 DAYS WITH P.CLOUDY (3-6)/8 3 8 11 12 12 1 1 5 1 3 8 5 70 DAYS WITH CLOUDY (7-8)/8 6 6 7 9 4 0 0 0 0 0 9 6 47 DAYS WITH VISIBILITY =< 2 KM 3 5 4 1 1 0 0 0 0 0 3 6 23 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.1 932.6 930.4 929.4 928.0 921.0 920.5 922.3 928.2 932.3 934.0 935.6 929.1 MAX. QFE PRESSURE IN HPA 941.0 938.8 935.7 936.0 932.5 930.4 924.6 927.4 933.8 938.0 940.0 940.5 941.0 DAY-HOUR 1- 6 22- 6 3- 6 4- 6 8- 6 2- 6 31- 6 30- 6 23- 6 21- 6 28- 6 22- 6 MIN. QFE PRESSURE IN HPA 927.2 928.2 922.5 925.3 923.8 915.8 915.5 916.8 922.8 927.1 927.7 927.9 915.5 DAY-HOUR 19-15 1-12 7-15 18-12 11-15 24-15 19-12 5-12 5-12 1- 3 8-12 1-15 MEAN QNH PRESSURE IN HPA 1016.3 1013.6 1011.3 1010.2 1008.7 1001.2 1000.6 1002.6 1008.9 1013.3 1015.1 1016.8 1009.9 MAX. QNH PRESSURE IN HPA 1022.6 1020.2 1016.9 1017.2 1013.5 1011.3 1005.1 1008.0 1014.9 1019.4 1021.5 1022.1 1022.6 DAY-HOUR 1- 6 22- 6 3- 6 4- 6 8- 6 2- 6 31- 6 30- 6 23- 6 21- 6 28- 6 22- 6 MIN. QNH PRESSURE IN HPA 1007.8 1008.9 1002.8 1005.8 1004.2 995.6 995.3 996.7 1003.1 1007.7 1008.4 1008.6 995.3 DAY-HOUR 19-15 1-12 7-15 18-12 11-15 24-15 19-12 5-12 5-12 1- 3 8-12 1-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 935.3 932.6 930.5 929.4 928.2 921.4 920.9 922.6 928.6 932.5 934.3 935.5 929.3 MAX. QFE PRESSURE IN HPA 939.7 937.7 934.5 934.6 931.3 928.1 923.9 926.8 933.0 936.9 938.6 939.4 939.7 DAY 1 22 4 3 8 2 4 30 23 21 16 22 MIN. QFE PRESSURE IN HPA 928.8 929.5 925.8 925.6 925.2 916.5 917.2 917.2 924.3 927.1 928.8 928.5 916.5 DAY 20 1 11 25 31 25 1 5 5 1 8 2 MEAN QNH PRESSURE IN HPA 1016.5 1013.6 1011.4 1010.2 1008.9 1001.6 1001.1 1002.9 1009.3 1013.5 1015.5 1016.7 1010.1 MAX. QNH PRESSURE IN HPA 1021.2 1019.1 1015.6 1015.8 1012.2 1008.8 1004.3 1007.4 1014.0 1018.2 1020.0 1020.9 1021.2 DAY 1 22 4 3 8 2 4 30 23 21 16 22 MIN. QNH PRESSURE IN HPA 1009.5 1010.3 1006.3 1006.1 1005.7 996.4 997.1 997.1 1004.7 1007.7 1009.5 1009.2 996.4 DAY 20 1 11 25 31 25 1 5 5 1 8 2 MEAN QFF PRESSURE IN HPA 1017.1 1013.7 1010.6 1007.6 1004.2 996.2 994.6 996.8 1004.2 1009.7 1014.2 1017.1 1007.2 MAX. QFF PRESSURE IN HPA 1022.7 1019.4 1015.2 1013.0 1009.2 1003.7 998.2 1002.2 1008.8 1014.4 1019.9 1022.3 1022.7 DAY 1 22 4 3 6 2 4 29 23 21 16 22 MIN. QFF PRESSURE IN HPA 1009.2 1010.0 1005.0 1002.5 999.7 990.7 990.2 990.3 999.3 1002.9 1006.8 1007.7 990.2 DAY 20 25 11 25 31 29 19 5 5 1 8 2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.5 933.9 931.6 930.4 929.1 921.9 921.5 923.4 929.7 933.7 935.3 936.8 930.3 MAX. QFE PRESSURE IN HPA 941.0 938.8 935.7 936.0 932.5 930.4 924.6 927.4 933.8 938.0 940.0 940.5 941.0 DAY 1 22 3 4 8 2 31 30 23 21 28 22 MIN. QFE PRESSURE IN HPA 930.0 930.2 925.9 926.8 926.0 916.7 917.9 918.0 925.5 928.5 930.5 930.9 916.7 DAY 20 1 15 21 31 25 19 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1017.8 1015.0 1012.6 1011.2 1009.9 1002.2 1001.8 1003.8 1010.5 1014.8 1016.5 1018.1 1011.2 MAX. QNH PRESSURE IN HPA 1022.6 1020.2 1016.9 1017.2 1013.5 1011.3 1005.1 1008.0 1014.9 1019.4 1021.5 1022.1 1022.6 DAY 1 22 3 4 8 2 31 30 23 21 28 22 MIN. QNH PRESSURE IN HPA 1010.8 1011.0 1006.4 1007.4 1006.5 996.6 997.9 998.0 1006.0 1009.2 1011.4 1011.8 996.6 DAY 20 1 15 21 31 25 19 5 5 1 8 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 935.3 933.1 931.1 930.1 928.6 921.5 920.8 922.8 928.7 932.6 934.2 935.8 929.5 MAX. QFE PRESSURE IN HPA 939.1 938.1 935.1 934.8 931.6 930.0 923.8 926.6 933.4 937.0 938.4 940.0 940.0 DAY 1 22 3 4 8 2 31 30 23 20 15 22 MIN. QFE PRESSURE IN HPA 929.4 929.6 925.8 927.3 925.7 916.9 916.8 917.8 924.4 928.1 929.4 929.6 916.8 DAY 20 1 15 18 11 25 19 5 5 1 8 20 MEAN QNH PRESSURE IN HPA 1016.5 1014.2 1012.0 1010.9 1009.3 1001.7 1001.0 1003.1 1009.4 1013.6 1015.4 1017.0 1010.3 MAX. QNH PRESSURE IN HPA 1020.6 1019.5 1016.3 1016.0 1012.5 1010.8 1004.2 1007.2 1014.5 1018.3 1019.8 1021.5 1021.5 DAY 1 22 3 4 8 2 31 30 23 20 15 22 MIN. QNH PRESSURE IN HPA 1010.2 1010.4 1006.3 1007.9 1006.2 996.8 996.7 997.8 1004.8 1008.8 1010.2 1010.4 996.7 DAY 20 1 15 18 11 25 19 5 5 1 8 20 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 933.9 931.6 929.5 928.9 927.3 920.4 919.6 921.4 927.0 931.1 932.9 934.7 928.2 MAX. QFE PRESSURE IN HPA 937.9 936.2 933.9 935.7 930.4 928.6 922.4 925.2 930.9 935.4 937.5 939.3 939.3 DAY 1 21 3 5 23 2 31 29 22 20 15 22 MIN. QFE PRESSURE IN HPA 927.7 928.2 923.4 925.3 924.0 916.2 915.5 916.8 922.8 927.8 927.7 928.2 915.5 DAY 19 1 15 18 11 24 19 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1015.0 1012.5 1010.3 1009.6 1007.9 1000.6 999.7 1001.6 1007.6 1012.0 1014.0 1015.8 1008.9 MAX. QNH PRESSURE IN HPA 1019.3 1017.5 1015.0 1016.9 1011.3 1009.3 1002.7 1005.7 1011.8 1016.6 1018.9 1020.8 1020.8 DAY 1 21 3 5 23 2 31 29 22 20 15 22 MIN. QNH PRESSURE IN HPA 1008.4 1008.9 1003.8 1005.8 1004.4 996.1 995.3 996.7 1003.1 1008.5 1008.4 1008.9 995.3 DAY 19 1 15 18 11 24 19 5 5 1 8 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.5 932.0 929.5 928.5 927.0 919.9 919.5 921.5 927.0 931.5 933.3 935.2 928.3 MAX. QFE PRESSURE IN HPA 938.2 937.0 934.3 934.1 929.9 927.8 923.3 925.6 931.8 935.7 938.2 939.1 939.1 DAY 1 21 3 4 6 1 31 28 22 20 15 22 MIN. QFE PRESSURE IN HPA 927.2 928.7 922.5 925.3 923.8 915.8 915.5 916.8 923.1 928.3 928.5 927.9 915.5 DAY 19 1 7 24 11 24 19 5 5 1 8 1 MEAN QNH PRESSURE IN HPA 1015.7 1013.0 1010.3 1009.3 1007.6 1000.1 999.6 1001.7 1007.6 1012.5 1014.4 1016.4 1009.0 MAX. QNH PRESSURE IN HPA 1019.6 1018.3 1015.4 1015.2 1010.7 1008.5 1003.7 1006.1 1012.8 1016.9 1019.6 1020.6 1020.6 DAY 1 21 3 4 6 1 31 28 22 20 15 22 MIN. QNH PRESSURE IN HPA 1007.8 1009.4 1002.8 1005.8 1004.2 995.6 995.3 996.7 1003.4 1009.0 1009.2 1008.6 995.3 DAY 19 1 7 24 11 24 19 5 5 1 8 1 MEAN QFF PRESSURE IN HPA 1016.2 1013.0 1009.5 1006.6 1003.0 994.7 993.2 995.6 1002.4 1008.7 1013.1 1016.8 1006.1 MAX. QFF PRESSURE IN HPA 1021.0 1018.6 1014.6 1012.6 1008.1 1003.6 997.2 1001.4 1007.2 1012.8 1019.6 1021.5 1021.5 DAY 24 21 3 4 6 1 31 28 22 20 15 22 MIN. QFF PRESSURE IN HPA 1007.9 1009.6 1001.9 1002.5 998.0 989.8 988.5 990.1 998.1 1004.1 1006.3 1007.7 988.5 DAY 19 1 7 24 29 30 19 5 5 1 8 1 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.6 14.6 15.5 23.2 32.2 35.0 37.1 35.4 32.8 25.7 20.3 13.5 24.8 MINIMUN AIR TEMPERATURE (C) 3.5 5.6 8.1 11.5 19.4 21.5 23.9 23.9 20.4 16.7 9.7 6.0 14.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 9 24 30 28 17 3 0 0 112 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 2.0 4.0 15.0 17.0 20.0 18.8 17.0 11.0 4.0 1.0 1.0 DAY 1 1 15 8 7 14 23 30 15 28 29 31 MAXIMUM AIR TEMPERATURE (C) 19.6 20.8 20.5 29.3 38.4 41.6 43.3 41.8 39.4 31.3 27.2 18.8 31.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 16 31 30 30 31 30 24 6 0 198 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 27.0 25.0 38.0 41.0 45.0 46.0 45.4 44.0 37.0 31.0 23.0 46.0 DAY 19 2 9 30 17 28 24 13 8 2 15 18 DIF. BETWEEN (MAX.-MIN.) (C) 16.1 15.2 12.4 17.8 19.0 20.1 19.4 17.9 19.0 14.6 17.5 12.8 16.8 MEAN DAILY TEMP. (MDT) (C) 11.6 13.2 14.3 20.4 28.9 31.6 33.6 32.9 29.9 24.0 18.5 12.4 22.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 53.3 244.0 317.0 377.8 367.7 267.6 98.0 1.0 0.0 1726.4 HEATING DEG. DAYS(BASE 18 0C) 191.5 134.7 116.2 29.5 0.0 0.0 0.0 0.0 0.0 0.0 21.0 173.6 666.6 DEWPOINT (MEAN C) 2.2 3.9 6.8 6.3 4.3 2.9 7.7 12.5 7.3 7.7 3.8 3.0 5.7 MIXING RATIO (G/KG) 4.91 5.60 6.89 6.75 5.78 5.40 7.53 10.65 7.19 7.46 5.63 5.54 6.61 VAPOUR PRESSURE (HPA) 7.33 8.34 10.19 9.99 8.53 7.94 11.00 15.48 10.58 11.04 8.38 8.26 9.75 SATURATION DEF. (HPA) 8.22 9.16 8.13 21.03 42.04 51.44 55.32 44.88 42.01 23.62 16.94 7.95 27.56 RELATIVE HUMIDITY (MEAN %) 54 54 60 40 20 16 19 29 24 37 38 57 37 RELATIVE HUMIDITY (MAX. %) 83 81 85 74 42 35 35 53 45 58 66 79 61 RELATIVE HUMIDITY (MIN. %) 30 33 43 22 10 8 12 16 12 24 21 39 23 RELATIVE HUMIDITY (MEAN% 03UTC) 83 79 83 72 42 35 34 52 45 56 64 75 60 RELATIVE HUMIDITY (MEAN% 09UTC) 38 41 50 27 13 10 14 21 17 29 26 47 28 RELATIVE HUMIDITY (MEAN% 15UTC) 54 49 56 33 15 11 16 27 18 34 35 57 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 27.0 24.5 116.0 7.0 0.0 0.0 0.0 11.0 0.0 19.4 0.0 129.0 333.9 DAYS WITH PRECIPITATION >=10 1 1 5 0 0 0 0 0 0 1 0 4 12 DAYS WITH PRECIPITATION >= 5 1 1 6 1 0 0 0 0 0 1 0 4 14 DAYS WITH PRECIPITATION >= 1 1 5 12 2 0 0 0 4 0 3 0 7 34 DAYS WITH PRECIPITATION 1 6 12 2 0 0 0 4 0 5 0 7 37 GREATEST DAILY PRECIPITATION 27.0 18.0 26.0 5.0 0.0 0.0 0.0 4.0 0.0 13.0 0.0 45.0 45.0 DAY 7 10 4 20 ** ** ** 10 ** 27 ** 24 DAY WITH THUNDER STORM 0 2 0 1 0 0 2 3 0 0 0 1 9 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 2 2 5 11 6 5 5 6 0 0 42 WIND DIRECTION (PREVAILING) 135 135 135 270 270 270 270 270 270 270 270 135 270 PREVAILING WIND SPEED(KNOTS) 9.9 10.8 10.1 10.2 13.1 13.0 11.3 12.4 10.4 10.3 9.4 9.9 11.2 PREVAILING WIND PERCENT 12.3 15.7 12.3 17.4 27.1 36.0 27.7 30.3 28.4 17.4 17.3 19.4 19.9 CALMS PERCENT OF WIND 80.0 65.0 61.3 63.8 52.3 46.7 39.4 41.3 48.6 51.6 60.0 56.1 55.4 NO. OF WIND OBSERVATION 155 140 155 149 155 150 155 155 148 155 150 155 1822 VECTOR WIND DIRECTION (MEAN) 144 150 169 269 272 269 249 254 248 229 239 152 246 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.6 0.7 2.1 4.9 5.6 3.4 3.8 3.5 2.4 1.9 2.0 2.2 WIND STEADINESES (MEAN %) 45.0 44.4 18.4 56.8 84.5 83.6 50.0 55.1 70.0 51.1 51.4 48.8 46.8 WIND SPEED (MEAN KNOTS) 2.0 3.6 3.8 3.7 5.8 6.7 6.8 6.9 5.0 4.7 3.7 4.1 4.7 FASTEST WIND DIRECTION 120 130 120 90 270 270 300 80 280 300 280 90 80 FASTEST WIND SPEED (KNOTS) 14 19 17 19 19 19 19 39 16 23 17 19 39 DAY 6 26 16 4 13 1 9 8 7 30 15 23 DAYS WITH SKY CLEAR (0-2)/8 23 18 10 14 21 30 28 25 29 17 27 17 259 DAYS WITH P.CLOUDY (3-6)/8 8 5 12 13 10 0 3 6 1 9 3 6 76 DAYS WITH CLOUDY (7-8)/8 0 5 9 3 0 0 0 0 0 5 0 8 30 DAYS WITH VISIBILITY =< 2 KM 2 2 5 0 0 2 1 2 2 2 0 8 26 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 937.1 934.5 930.5 931.5 927.9 923.3 921.3 921.7 926.8 932.2 934.6 936.4 929.8 MAX. QFE PRESSURE IN HPA 941.9 940.0 936.5 937.6 932.7 928.2 927.5 927.8 933.1 937.6 938.8 942.1 942.1 DAY-HOUR 17- 6 2- 6 2- 6 22- 6 12- 6 1- 6 29- 6 7-15 30- 6 24- 6 30- 6 2- 6 MIN. QFE PRESSURE IN HPA 931.2 927.9 923.3 925.8 922.8 918.5 917.1 917.9 921.8 926.5 928.9 930.9 917.1 DAY-HOUR 2-15 10-12 14- 3 4-15 29-15 8-15 26-15 13-12 10-12 4-12 25-12 30-12 MEAN QNH PRESSURE IN HPA 1018.5 1015.6 1011.3 1012.5 1008.6 1003.6 1001.5 1001.9 1007.4 1013.2 1015.7 1017.6 1010.6 MAX. QNH PRESSURE IN HPA 1023.6 1021.5 1017.8 1019.0 1013.7 1008.9 1008.2 1008.5 1014.1 1019.0 1020.2 1023.8 1023.8 DAY-HOUR 17- 6 2- 6 2- 6 22- 6 12- 6 1- 6 29- 6 7-15 30- 6 24- 6 30- 6 2- 6 MIN. QNH PRESSURE IN HPA 1012.1 1008.6 1003.7 1006.3 1003.1 998.5 997.0 997.9 1002.1 1007.1 1009.7 1011.8 997.0 DAY-HOUR 2-15 10-12 14- 3 4-15 29-15 8-15 26-15 13-12 10-12 4-12 25-12 30-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 937.1 934.4 930.3 931.5 928.0 923.5 921.5 921.9 926.9 931.9 934.5 936.4 929.8 MAX. QFE PRESSURE IN HPA 940.8 939.5 935.9 936.8 931.4 927.1 925.3 926.1 931.8 934.9 936.6 941.2 941.2 DAY 17 1 2 22 12 1 30 8 26 24 19 2 MIN. QFE PRESSURE IN HPA 932.3 929.5 923.3 926.1 924.0 919.6 918.5 918.9 922.8 927.2 931.0 932.0 918.5 DAY 3 10 14 5 23 9 27 25 11 4 25 31 MEAN QNH PRESSURE IN HPA 1018.4 1015.5 1011.1 1012.4 1008.7 1003.9 1001.7 1002.1 1007.5 1012.9 1015.7 1017.7 1010.6 MAX. QNH PRESSURE IN HPA 1022.4 1021.0 1017.1 1018.1 1012.3 1007.7 1005.8 1006.7 1012.8 1016.1 1017.9 1022.8 1022.8 DAY 17 1 2 22 12 1 30 8 26 24 19 2 MIN. QNH PRESSURE IN HPA 1013.3 1010.3 1003.7 1006.7 1004.4 999.7 998.5 999.0 1003.1 1007.8 1011.9 1013.0 998.5 DAY 3 10 14 5 23 9 27 25 11 4 25 31 MEAN QFF PRESSURE IN HPA 1018.8 1015.1 1010.2 1009.8 1003.7 998.2 995.4 996.1 1002.2 1009.3 1014.0 1017.6 1007.5 MAX. QFF PRESSURE IN HPA 1022.9 1020.9 1016.0 1016.3 1007.7 1002.5 999.4 1001.2 1008.7 1013.8 1017.9 1023.4 1023.4 DAY 17 1 2 22 12 2 30 8 30 28 30 2 MIN. QFF PRESSURE IN HPA 1014.2 1009.3 1001.7 1003.6 999.3 994.1 992.0 992.1 997.6 1003.5 1010.0 1011.6 992.0 DAY 3 18 14 27 23 9 27 14 11 4 25 24 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 938.3 935.6 931.4 932.7 929.1 924.3 922.3 922.8 928.0 933.5 935.9 937.7 931.0 MAX. QFE PRESSURE IN HPA 941.9 940.0 936.5 937.6 932.7 928.2 927.5 926.8 933.1 937.6 938.8 942.1 942.1 DAY 17 2 2 22 12 1 29 7 30 24 30 2 MIN. QFE PRESSURE IN HPA 933.9 930.6 925.7 928.2 925.2 920.7 919.0 919.6 923.5 928.8 931.5 933.5 919.0 DAY 2 18 14 5 23 8 27 25 11 4 25 31 MEAN QNH PRESSURE IN HPA 1019.8 1016.8 1012.3 1013.7 1009.9 1004.7 1002.6 1003.1 1008.7 1014.5 1017.1 1019.1 1011.9 MAX. QNH PRESSURE IN HPA 1023.6 1021.5 1017.8 1019.0 1013.7 1008.9 1008.2 1007.4 1014.1 1019.0 1020.2 1023.8 1023.8 DAY 17 2 2 22 12 1 29 7 30 24 30 2 MIN. QNH PRESSURE IN HPA 1015.0 1011.5 1006.2 1008.9 1005.7 1000.9 999.1 999.7 1003.9 1009.5 1012.4 1014.6 999.1 DAY 2 18 14 5 23 8 27 25 11 4 25 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 937.6 935.3 931.1 932.3 928.5 923.7 921.9 922.2 927.3 932.9 934.8 936.8 930.4 MAX. QFE PRESSURE IN HPA 941.3 938.5 936.3 936.5 932.3 927.3 926.0 926.4 932.4 937.4 938.3 941.2 941.3 DAY 17 1 2 22 11 2 29 7 30 30 30 2 MIN. QFE PRESSURE IN HPA 933.1 930.2 925.2 928.0 924.6 920.2 918.5 919.0 922.5 928.2 930.2 933.0 918.5 DAY 2 10 13 26 23 8 26 21 11 4 25 13 MEAN QNH PRESSURE IN HPA 1019.0 1016.5 1012.1 1013.3 1009.3 1004.1 1002.1 1002.4 1007.9 1013.9 1016.0 1018.1 1011.2 MAX. QNH PRESSURE IN HPA 1022.9 1019.9 1017.6 1017.8 1013.3 1007.9 1006.5 1007.0 1013.4 1018.7 1019.7 1022.8 1022.9 DAY 17 1 2 22 11 2 29 7 30 30 30 2 MIN. QNH PRESSURE IN HPA 1014.1 1011.0 1005.7 1008.7 1005.1 1000.3 998.5 999.1 1002.8 1008.9 1011.0 1014.0 998.5 DAY 2 10 13 26 23 8 26 21 11 4 25 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 936.2 933.6 929.8 930.8 927.2 922.6 920.7 920.8 926.0 931.4 933.5 935.2 929.0 MAX. QFE PRESSURE IN HPA 939.7 937.6 935.0 934.6 931.0 925.7 925.0 924.9 931.1 934.8 936.9 939.3 939.7 DAY 17 1 2 22 12 1 29 7 30 30 30 1 MIN. QFE PRESSURE IN HPA 931.2 927.9 923.8 926.1 923.6 918.7 917.3 917.9 921.8 926.5 928.9 930.9 917.3 DAY 6 10 13 4 23 8 26 13 10 4 25 30 MEAN QNH PRESSURE IN HPA 1017.4 1014.7 1010.6 1011.7 1007.9 1002.9 1000.9 1001.0 1006.6 1012.4 1014.6 1016.4 1009.7 MAX. QNH PRESSURE IN HPA 1021.2 1019.0 1016.2 1015.8 1011.9 1006.2 1005.5 1005.4 1012.0 1016.0 1018.2 1020.8 1021.2 DAY 17 1 2 22 12 1 29 7 30 30 30 1 MIN. QNH PRESSURE IN HPA 1012.1 1008.6 1004.2 1006.7 1004.0 998.7 997.2 997.9 1002.1 1007.1 1009.7 1011.8 997.2 DAY 6 10 13 4 23 8 26 13 10 4 25 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.5 933.6 929.8 930.5 926.8 922.2 920.3 920.9 926.0 931.6 934.1 935.7 929.0 MAX. QFE PRESSURE IN HPA 940.6 938.3 934.8 933.8 930.5 925.6 923.8 927.8 931.6 934.9 937.1 939.5 940.6 DAY 17 1 2 21 12 1 31 7 30 31 30 1 MIN. QFE PRESSURE IN HPA 931.2 928.9 923.4 925.8 922.8 918.5 917.1 917.9 921.8 926.7 930.1 931.3 917.1 DAY 2 10 13 4 29 8 26 25 10 4 25 30 MEAN QNH PRESSURE IN HPA 1017.8 1014.7 1010.7 1011.4 1007.4 1002.5 1000.4 1001.1 1006.6 1012.5 1015.2 1016.9 1009.8 MAX. QNH PRESSURE IN HPA 1022.2 1019.7 1016.0 1014.9 1011.4 1006.1 1004.2 1008.5 1012.5 1016.1 1018.4 1021.0 1022.2 DAY 17 1 2 21 12 1 31 7 30 31 30 1 MIN. QNH PRESSURE IN HPA 1012.1 1009.7 1003.8 1006.3 1003.1 998.5 997.0 997.9 1002.1 1007.3 1010.9 1012.2 997.0 DAY 2 10 13 4 29 8 26 25 10 4 25 30 MEAN QFF PRESSURE IN HPA 1018.1 1014.2 1009.7 1008.7 1002.5 996.9 994.1 995.0 1001.4 1009.0 1013.5 1016.7 1006.7 MAX. QFF PRESSURE IN HPA 1022.4 1019.1 1014.3 1014.2 1007.1 1000.9 999.2 1002.9 1008.8 1013.6 1018.5 1021.2 1022.4 DAY 17 1 1 7 12 1 31 7 30 31 30 2 MIN. QFF PRESSURE IN HPA 1012.2 1008.7 1002.6 1003.3 997.9 992.9 990.7 990.7 996.4 1002.9 1009.2 1011.5 990.7 DAY 6 18 13 19 29 8 26 13 10 4 25 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.0 13.0 17.1 23.1 31.2 34.3 36.3 35.7 32.7 27.3 19.0 13.6 24.4 MINIMUN AIR TEMPERATURE (C) 4.1 ***** ***** 14.8 18.8 21.8 25.4 24.1 20.8 16.2 10.4 6.9 ***** DAYS WITH MINIMUM TEMP. >=21 0 **** **** 1 5 20 31 31 14 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 0 **** **** 0 0 0 0 0 0 0 0 0 **** DAYS WITH FREEZING MIN.<= 0 5 **** **** 0 0 0 0 0 0 0 0 2 **** TEMPERATURE RECORDS LOWEST(C) -2.0 ***** ***** 5.0 15.0 18.0 21.0 22.0 17.0 13.0 3.0 -2.0 ***** DAY 20 ** ** 7 8 4 2 28 30 28 22 29 MAXIMUM AIR TEMPERATURE (C) 15.3 18.3 22.7 29.4 37.7 40.6 42.3 41.8 39.8 34.3 25.7 19.2 30.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 15 31 30 31 31 30 31 10 0 210 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 23.0 30.0 36.0 43.0 45.0 48.0 45.7 46.0 37.2 34.0 26.0 48.0 DAY 4 29 30 18 28 12 14 1 9 4 4 5 DIF. BETWEEN (MAX.-MIN.) (C) 11.2 ***** ***** 14.6 18.9 18.8 16.9 17.7 19.0 18.1 15.3 12.3 ***** MEAN DAILY TEMP. (MDT) (C) 9.7 ***** ***** 22.1 28.2 31.2 33.9 32.9 30.3 25.2 18.0 13.0 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 ****** 0.0 54.4 223.8 306.7 398.7 370.4 278.1 131.1 14.3 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 218.7 ****** 4.3 3.5 0.0 0.0 0.0 0.0 0.0 0.0 52.8 153.5 ****** DEWPOINT (MEAN C) 4.5 5.2 7.1 6.4 1.6 2.3 8.0 6.7 2.5 2.9 4.0 2.9 4.5 MIXING RATIO (G/KG) 5.80 6.09 6.99 6.87 4.86 5.09 7.68 6.87 5.50 5.31 5.76 5.41 6.02 VAPOUR PRESSURE (HPA) 8.63 9.03 10.34 10.14 7.19 7.49 11.19 10.06 8.10 7.88 8.58 8.04 8.89 SATURATION DEF. (HPA) 4.13 6.52 10.12 19.85 40.77 49.58 51.71 51.03 44.38 30.43 15.01 8.33 27.65 RELATIVE HUMIDITY (MEAN %) 72 63 57 39 19 16 20 19 18 24 43 55 37 RELATIVE HUMIDITY (MAX. %) 91 86 85 68 41 31 35 37 34 44 69 76 58 RELATIVE HUMIDITY (MIN. %) 53 43 39 24 9 8 12 11 10 13 25 38 24 RELATIVE HUMIDITY (MEAN% 03UTC) 89 86 83 68 40 31 35 37 34 44 68 72 57 RELATIVE HUMIDITY (MEAN% 09UTC) 59 49 46 29 12 11 14 13 13 16 30 47 28 RELATIVE HUMIDITY (MEAN% 15UTC) 74 60 50 31 12 10 16 14 14 20 40 56 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 126.3 86.0 64.0 24.0 0.0 0.0 0.0 0.0 0.0 0.0 19.0 49.0 368.3 DAYS WITH PRECIPITATION >=10 4 3 3 1 0 0 0 0 0 0 0 2 13 DAYS WITH PRECIPITATION >= 5 6 3 4 1 0 0 0 0 0 0 1 4 19 DAYS WITH PRECIPITATION >= 1 8 7 6 4 0 0 0 0 0 0 4 8 37 DAYS WITH PRECIPITATION 8 7 6 4 0 0 0 0 0 0 4 8 37 GREATEST DAILY PRECIPITATION 55.0 34.0 25.0 16.0 0.0 0.0 0.0 0.0 0.0 0.0 8.0 19.0 55.0 DAY 7 17 5 26 ** ** ** ** ** ** 14 26 DAY WITH THUNDER STORM 0 1 2 0 0 0 0 0 0 0 2 0 5 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 2 4 3 2 5 1 2 3 4 2 0 28 WIND DIRECTION (PREVAILING) 135 135 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.6 10.1 10.7 10.3 11.8 11.9 10.4 13.4 10.4 10.8 10.5 8.2 11.1 PREVAILING WIND PERCENT 16.1 19.3 16.8 18.0 31.6 36.7 25.8 39.4 34.0 25.8 16.0 15.5 23.4 CALMS PERCENT OF WIND 56.1 51.0 57.4 53.3 47.7 44.0 43.2 50.3 53.3 63.2 65.3 67.7 54.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 153 165 226 208 274 271 251 268 264 265 243 229 253 VECTOR WIND MAGNITUDE(KNOTS) 2.3 1.8 1.6 1.5 4.9 5.6 4.0 5.7 3.8 3.2 1.7 0.7 2.6 WIND STEADINESES (MEAN %) 56.1 33.3 37.2 32.6 79.0 83.6 70.2 87.7 79.2 82.1 45.9 25.9 53.1 WIND SPEED (MEAN KNOTS) 4.1 5.4 4.3 4.6 6.2 6.7 5.7 6.5 4.8 3.9 3.7 2.7 4.9 FASTEST WIND DIRECTION 120 100 300 280 330 300 300 270 360 270 300 300 300 FASTEST WIND SPEED (KNOTS) 19 23 19 19 23 29 27 31 19 23 39 19 39 DAY 7 2 23 18 30 15 26 30 2 6 20 27 DAYS WITH SKY CLEAR (0-2)/8 13 15 16 14 25 30 30 31 30 25 20 12 261 DAYS WITH P.CLOUDY (3-6)/8 11 8 8 11 6 0 1 0 0 6 6 9 66 DAYS WITH CLOUDY (7-8)/8 7 6 7 5 0 0 0 0 0 0 4 10 39 DAYS WITH VISIBILITY =< 2 KM 9 4 4 2 0 1 0 0 1 0 0 5 26 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.8 932.4 930.6 930.0 927.4 922.7 918.5 920.8 925.6 931.5 935.2 935.0 928.7 MAX. QFE PRESSURE IN HPA 940.7 938.9 935.3 936.2 933.0 927.9 923.6 926.1 930.6 936.9 939.1 941.6 941.6 DAY-HOUR 3- 6 20- 6 15- 6 13- 9 3- 6 2- 6 11- 6 31- 6 14- 6 28- 6 6- 6 29- 6 MIN. QFE PRESSURE IN HPA 928.8 925.6 925.0 923.3 923.8 917.5 914.4 915.5 921.1 925.8 931.6 926.3 914.4 DAY-HOUR 26-12 17- 3 23-12 25-15 27-12 27-15 18-15 2-15 16-12 1-12 23-12 26-12 MEAN QNH PRESSURE IN HPA 1016.0 1013.4 1011.4 1010.9 1008.0 1003.0 998.5 1001.0 1006.1 1012.4 1016.4 1016.2 1009.4 MAX. QNH PRESSURE IN HPA 1022.3 1020.4 1016.5 1017.5 1014.0 1008.6 1004.0 1006.7 1011.5 1018.2 1020.6 1023.2 1023.2 DAY-HOUR 3- 6 20- 6 15- 6 13- 9 3- 6 2- 6 11- 6 31- 6 14- 6 28- 6 6- 6 29- 6 MIN. QNH PRESSURE IN HPA 1009.5 1006.1 1005.5 1003.7 1004.2 997.5 994.1 995.3 1001.3 1006.3 1012.5 1006.9 994.1 DAY-HOUR 26-12 17- 3 23-12 25-15 27-12 27-15 18-15 2-15 16-12 1-12 23-12 26-12 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 934.6 932.2 930.5 929.9 927.3 922.9 918.6 920.9 925.6 931.5 935.3 934.9 928.7 MAX. QFE PRESSURE IN HPA 938.9 937.6 934.2 933.8 931.2 926.4 922.8 925.0 929.4 935.6 938.0 940.7 940.7 DAY 3 20 17 12 8 3 30 31 15 28 26 29 MIN. QFE PRESSURE IN HPA 929.2 925.6 925.1 924.4 924.6 918.6 915.1 917.7 921.7 926.4 932.4 927.3 915.1 DAY 26 17 23 25 18 27 18 2 17 1 18 26 MEAN QNH PRESSURE IN HPA 1015.8 1013.2 1011.4 1010.7 1008.0 1003.2 998.6 1001.1 1006.2 1012.5 1016.5 1016.1 1009.4 MAX. QNH PRESSURE IN HPA 1020.4 1019.0 1015.3 1014.9 1012.1 1007.0 1003.1 1005.5 1010.2 1016.8 1019.4 1022.3 1022.3 DAY 3 20 17 12 8 3 30 31 15 28 26 29 MIN. QNH PRESSURE IN HPA 1010.0 1006.1 1005.6 1004.8 1005.1 998.6 994.9 997.7 1001.9 1007.0 1013.4 1007.9 994.9 DAY 26 17 23 25 18 27 18 2 17 1 18 26 MEAN QFF PRESSURE IN HPA 1016.5 1013.1 1010.2 1007.9 1003.3 997.6 992.3 995.0 1001.1 1008.9 1015.0 1015.9 1006.4 MAX. QFF PRESSURE IN HPA 1021.9 1019.5 1015.1 1014.0 1008.5 1001.5 997.0 999.9 1005.0 1014.1 1019.3 1025.5 1025.5 DAY 3 4 15 7 8 3 30 31 25 28 26 29 MIN. QFF PRESSURE IN HPA 1010.5 1005.3 1002.8 1001.1 999.9 993.0 988.1 991.0 996.4 1002.9 1011.6 1006.9 988.1 DAY 26 17 23 24 18 28 15 2 17 1 11 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.9 933.7 931.7 931.1 928.4 923.7 919.5 921.8 926.8 932.7 936.6 936.3 929.8 MAX. QFE PRESSURE IN HPA 940.7 938.9 935.3 936.1 933.0 927.9 923.6 926.1 930.6 936.9 939.1 941.6 941.6 DAY 3 20 15 12 3 2 11 31 14 28 6 29 MIN. QFE PRESSURE IN HPA 931.4 928.1 926.4 925.7 925.5 918.9 916.0 918.2 922.9 927.1 934.0 927.7 916.0 DAY 26 3 23 25 18 27 14 2 17 1 18 26 MEAN QNH PRESSURE IN HPA 1017.1 1014.7 1012.6 1012.0 1009.1 1004.0 999.6 1002.1 1007.4 1013.7 1017.9 1017.5 1010.7 MAX. QNH PRESSURE IN HPA 1022.3 1020.4 1016.5 1017.4 1014.0 1008.6 1004.0 1006.7 1011.5 1018.2 1020.6 1023.2 1023.2 DAY 3 20 15 12 3 2 11 31 14 28 6 29 MIN. QNH PRESSURE IN HPA 1012.3 1008.8 1007.0 1006.2 1006.0 999.0 995.8 998.2 1003.2 1007.7 1015.1 1008.4 995.8 DAY 26 3 23 25 18 27 14 2 17 1 18 26 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 935.3 933.1 931.2 930.9 928.0 923.2 919.1 921.3 926.2 931.9 935.6 935.5 929.3 MAX. QFE PRESSURE IN HPA 939.9 938.0 935.1 936.2 933.0 927.0 922.5 925.9 929.9 935.6 938.3 940.9 940.9 DAY 3 4 15 13 3 3 30 31 14 28 26 3 MIN. QFE PRESSURE IN HPA 930.5 927.6 927.1 925.9 925.0 918.6 915.5 917.6 922.7 926.5 933.1 926.9 915.5 DAY 26 17 23 25 18 27 18 2 17 1 19 26 MEAN QNH PRESSURE IN HPA 1016.5 1014.1 1012.2 1011.8 1008.6 1003.5 999.1 1001.6 1006.7 1012.8 1016.8 1016.7 1010.0 MAX. QNH PRESSURE IN HPA 1021.4 1019.4 1016.3 1017.5 1014.0 1007.6 1002.8 1006.4 1010.7 1016.8 1019.7 1022.5 1022.5 DAY 3 4 15 13 3 3 30 31 14 28 26 3 MIN. QNH PRESSURE IN HPA 1011.4 1008.3 1007.7 1006.4 1005.5 998.6 995.3 997.6 1003.0 1007.1 1014.1 1007.5 995.3 DAY 26 17 23 25 18 27 18 2 17 1 19 26 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 933.9 931.4 929.7 929.5 926.9 922.1 918.0 920.1 924.6 930.5 934.1 934.0 927.9 MAX. QFE PRESSURE IN HPA 938.8 937.1 933.3 933.7 931.3 926.0 921.2 925.0 928.6 934.1 936.4 940.3 940.3 DAY 3 4 16 12 3 3 11 31 14 27 26 29 MIN. QFE PRESSURE IN HPA 928.8 926.0 925.0 923.9 923.8 918.1 914.9 916.2 921.1 925.8 931.6 926.3 914.9 DAY 26 17 23 25 27 28 18 2 16 1 23 26 MEAN QNH PRESSURE IN HPA 1015.0 1012.4 1010.5 1010.2 1007.5 1002.4 998.0 1000.3 1005.1 1011.3 1015.2 1015.1 1008.6 MAX. QNH PRESSURE IN HPA 1020.2 1018.4 1014.4 1014.8 1012.2 1006.5 1001.4 1005.5 1009.3 1015.2 1017.7 1021.9 1021.9 DAY 3 4 16 12 3 3 11 31 14 27 26 29 MIN. QNH PRESSURE IN HPA 1009.5 1006.5 1005.5 1004.3 1004.2 998.1 994.7 996.1 1001.3 1006.3 1012.5 1006.9 994.7 DAY 26 17 23 25 27 28 18 2 16 1 23 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.3 931.8 929.7 929.0 926.4 921.6 917.5 919.9 924.6 930.8 934.6 934.4 927.9 MAX. QFE PRESSURE IN HPA 939.7 936.7 933.6 933.4 930.9 925.3 921.2 924.9 929.0 934.5 937.3 939.8 939.8 DAY 3 4 15 11 3 3 11 31 14 27 25 29 MIN. QFE PRESSURE IN HPA 929.9 926.8 925.6 923.3 923.8 917.5 914.4 915.5 921.6 926.2 931.7 926.7 914.4 DAY 26 17 23 25 27 27 18 2 8 7 19 26 MEAN QNH PRESSURE IN HPA 1015.5 1012.7 1010.5 1009.8 1007.0 1001.8 997.4 1000.0 1005.0 1011.7 1015.8 1015.6 1008.6 MAX. QNH PRESSURE IN HPA 1021.2 1018.0 1014.7 1014.5 1011.8 1005.8 1001.4 1005.4 1009.8 1015.6 1018.6 1021.3 1021.3 DAY 3 4 15 11 3 3 11 31 14 27 25 29 MIN. QNH PRESSURE IN HPA 1010.7 1007.4 1006.1 1003.7 1004.2 997.5 994.1 995.3 1001.8 1006.8 1012.6 1007.3 994.1 DAY 26 17 23 25 27 27 18 2 8 7 19 26 MEAN QFF PRESSURE IN HPA 1016.1 1012.5 1009.2 1007.0 1002.3 996.3 991.2 994.0 999.9 1008.1 1014.3 1015.3 1005.5 MAX. QFF PRESSURE IN HPA 1022.0 1019.2 1014.4 1012.8 1007.0 1000.8 995.5 1000.1 1004.1 1012.6 1018.7 1023.8 1023.8 DAY 3 4 15 7 8 3 11 31 14 27 25 29 MIN. QFF PRESSURE IN HPA 1010.9 1006.8 1004.4 1000.0 999.3 992.2 987.8 988.6 996.2 1002.7 1011.1 1006.3 987.8 DAY 25 17 23 25 18 30 14 2 9 1 19 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 10.7 16.4 22.4 29.8 34.9 37.5 36.0 31.2 26.7 18.2 12.1 23.8 MINIMUN AIR TEMPERATURE (C) ***** 4.4 8.9 12.7 ***** ***** ***** 24.8 20.4 15.6 11.8 6.8 ***** DAYS WITH MINIMUM TEMP. >=21 **** 0 0 0 **** **** **** 29 11 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** 0 0 0 **** **** **** 0 0 0 0 0 **** DAYS WITH FREEZING MIN.<= 0 **** 1 0 0 **** **** **** 0 0 0 0 0 **** TEMPERATURE RECORDS LOWEST(C) ***** -2.0 1.0 3.0 ***** ***** ***** 21.0 15.0 10.0 6.0 2.0 ***** DAY ** 16 31 1 ** ** ** 13 30 24 25 26 MAXIMUM AIR TEMPERATURE (C) 14.6 16.3 21.7 28.4 35.7 41.4 43.2 42.2 37.7 33.7 22.9 16.8 29.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 15 30 30 31 31 30 29 0 0 196 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 22.5 28.4 34.0 42.0 48.0 46.2 44.0 42.0 39.0 28.0 23.5 48.0 DAY 22 28 7 15 25 28 13 7 9 6 1 1 DIF. BETWEEN (MAX.-MIN.) (C) ***** 11.9 12.8 15.7 ***** ***** ***** 17.4 17.3 18.1 11.1 10.0 ***** MEAN DAILY TEMP. (MDT) (C) ***** 10.4 15.3 20.6 ***** ***** ***** 33.5 29.0 24.7 17.3 11.8 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 34.8 24.0 0.0 0.0 364.7 241.3 116.4 4.3 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 117.7 115.2 91.3 22.3 0.0 0.0 0.0 0.0 0.0 0.0 36.3 192.2 ****** DEWPOINT (MEAN C) 1.3 -0.9 4.4 7.9 6.0 2.7 6.7 6.9 8.0 7.4 9.5 7.1 5.6 MIXING RATIO (G/KG) 4.64 4.21 5.86 7.36 6.79 5.22 7.40 7.09 7.97 7.15 8.26 6.93 6.57 VAPOUR PRESSURE (HPA) 6.91 6.27 8.68 10.87 9.99 7.67 10.79 10.37 11.68 10.58 12.25 10.30 9.70 SATURATION DEF. (HPA) 5.08 7.22 10.93 18.00 34.85 51.78 56.35 51.60 36.37 26.78 9.33 4.23 26.04 RELATIVE HUMIDITY (MEAN %) 64 51 51 44 26 15 19 19 27 33 61 75 40 RELATIVE HUMIDITY (MAX. %) 88 78 78 74 46 30 39 33 49 62 81 95 63 RELATIVE HUMIDITY (MIN. %) 43 31 32 27 16 9 9 10 17 20 45 56 26 RELATIVE HUMIDITY (MEAN% 03UTC) 87 76 76 72 46 30 39 33 49 60 80 93 62 RELATIVE HUMIDITY (MEAN% 09UTC) 49 40 37 33 20 10 12 13 19 24 53 66 31 RELATIVE HUMIDITY (MEAN% 15UTC) 61 42 46 37 20 10 15 14 22 24 57 70 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 53.0 37.0 74.3 29.0 3.0 0.0 0.0 0.0 0.0 0.0 89.0 177.0 462.3 DAYS WITH PRECIPITATION >=10 2 2 3 1 0 0 0 0 0 0 3 7 18 DAYS WITH PRECIPITATION >= 5 2 3 7 2 0 0 0 0 0 0 5 8 27 DAYS WITH PRECIPITATION >= 1 6 6 11 5 1 0 0 0 0 0 6 8 43 DAYS WITH PRECIPITATION 6 6 12 5 1 0 0 0 0 0 6 8 44 GREATEST DAILY PRECIPITATION 25.0 12.0 15.0 16.0 3.0 0.0 0.0 0.0 0.0 0.0 39.0 33.0 39.0 DAY 3 22 20 25 8 ** ** ** ** ** 15 2 DAY WITH THUNDER STORM 1 0 2 3 1 0 0 0 0 0 1 1 9 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 2 4 1 0 1 4 3 4 1 0 1 24 WIND DIRECTION (PREVAILING) 135 270 135 270 270 270 270 270 270 270 135 135 270 PREVAILING WIND SPEED(KNOTS) 9.3 9.9 10.2 10.1 12.8 11.8 12.7 12.9 12.9 11.0 10.3 10.9 11.6 PREVAILING WIND PERCENT 16.1 16.4 16.8 23.3 24.5 40.0 29.7 36.1 35.3 24.5 18.7 17.4 23.5 CALMS PERCENT OF WIND 58.1 54.3 48.4 51.3 48.4 52.0 47.7 50.3 48.7 53.5 54.7 55.5 51.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 171 187 149 246 266 271 247 264 266 242 158 172 244 VECTOR WIND MAGNITUDE(KNOTS) 1.4 1.4 1.9 2.0 3.9 5.3 3.1 5.1 5.2 3.0 1.4 2.0 2.3 WIND STEADINESES (MEAN %) 36.8 32.6 38.0 41.7 65.0 94.6 50.0 83.6 83.9 63.8 31.1 43.5 44.2 WIND SPEED (MEAN KNOTS) 3.8 4.3 5.0 4.8 6.0 5.6 6.2 6.1 6.2 4.7 4.5 4.6 5.2 FASTEST WIND DIRECTION 270 90 130 330 270 300 280 280 270 270 280 130 130 FASTEST WIND SPEED (KNOTS) 19 19 29 23 19 19 21 23 29 16 29 16 29 DAY 4 10 10 22 8 9 8 18 19 2 12 12 DAYS WITH SKY CLEAR (0-2)/8 15 18 16 15 23 30 30 28 30 28 12 17 262 DAYS WITH P.CLOUDY (3-6)/8 10 4 8 12 2 0 1 3 0 2 7 6 55 DAYS WITH CLOUDY (7-8)/8 6 6 7 3 6 0 0 0 0 1 11 8 48 DAYS WITH VISIBILITY =< 2 KM 14 1 7 0 1 0 0 0 0 0 1 14 38 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.4 934.9 930.3 930.7 927.5 922.5 920.1 921.4 925.8 931.6 935.3 934.8 929.1 MAX. QFE PRESSURE IN HPA 938.2 940.0 938.0 938.1 932.7 926.6 923.7 925.0 932.5 938.4 939.4 939.1 940.0 DAY-HOUR 19- 6 8- 6 31- 9 1- 6 8- 6 23- 6 8- 6 26- 6 24- 6 27- 9 26- 6 2- 9 MIN. QFE PRESSURE IN HPA 929.4 928.4 923.6 924.1 921.6 918.4 916.4 916.4 921.3 925.2 931.1 930.2 916.4 DAY-HOUR 3- 3 22-15 15-15 23-15 30-15 30-12 30-15 1-15 5-15 11-12 6-12 15- 3 MEAN QNH PRESSURE IN HPA 1015.5 1016.0 1011.1 1011.5 1008.2 1002.8 1000.2 1001.6 1006.3 1012.5 1016.5 1015.9 1009.9 MAX. QNH PRESSURE IN HPA 1019.6 1021.5 1019.4 1019.5 1013.7 1007.2 1004.1 1005.5 1013.5 1019.8 1020.9 1020.6 1021.5 DAY-HOUR 19- 6 8- 6 31- 9 1- 6 8- 6 23- 6 8- 6 26- 6 24- 6 27- 9 26- 6 2- 9 MIN. QNH PRESSURE IN HPA 1010.2 1009.1 1004.0 1004.5 1001.8 998.4 996.3 996.3 1001.5 1005.7 1012.0 1011.0 996.3 DAY-HOUR 3- 3 22-15 15-15 23-15 30-15 30-12 30-15 1-15 5-15 11-12 6-12 15- 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 934.1 934.8 930.2 930.8 927.7 922.6 920.4 921.6 925.9 931.6 935.0 934.4 929.1 MAX. QFE PRESSURE IN HPA 936.6 938.8 936.1 937.9 932.1 926.2 922.9 923.7 931.2 937.0 937.5 937.8 938.8 DAY 19 8 31 1 9 23 11 26 24 27 27 19 MIN. QFE PRESSURE IN HPA 929.4 930.6 925.7 926.0 923.0 919.4 917.9 918.4 922.1 926.6 931.6 930.2 917.9 DAY 3 13 10 24 30 30 31 1 12 11 6 15 MEAN QNH PRESSURE IN HPA 1015.3 1016.0 1011.0 1011.6 1008.3 1002.9 1000.6 1001.8 1006.5 1012.6 1016.2 1015.6 1009.9 MAX. QNH PRESSURE IN HPA 1017.9 1020.2 1017.4 1019.3 1013.1 1006.8 1003.2 1004.1 1012.1 1018.3 1018.9 1019.2 1020.2 DAY 19 8 31 1 9 23 11 26 24 27 27 19 MIN. QNH PRESSURE IN HPA 1010.2 1011.5 1006.2 1006.5 1003.3 999.5 997.9 998.4 1002.4 1007.2 1012.5 1011.0 997.9 DAY 3 13 10 24 30 30 31 1 12 11 6 15 MEAN QFF PRESSURE IN HPA 1016.3 1016.6 1009.8 1009.0 1003.8 997.2 994.0 995.5 1001.3 1008.8 1014.4 1015.4 1006.8 MAX. QFF PRESSURE IN HPA 1020.1 1021.3 1018.7 1019.7 1009.6 1001.6 997.3 997.8 1007.4 1015.2 1017.6 1019.7 1021.3 DAY 19 8 31 1 9 23 8 26 24 27 29 19 MIN. QFF PRESSURE IN HPA 1010.7 1011.4 1002.9 1003.4 997.9 992.9 991.3 991.5 997.1 1003.1 1010.3 1010.1 991.3 DAY 3 23 10 24 30 30 31 1 6 11 6 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.4 936.2 931.4 931.8 928.6 923.4 921.1 922.3 926.8 932.8 936.4 935.7 930.1 MAX. QFE PRESSURE IN HPA 938.2 940.0 937.9 938.1 932.7 926.6 923.7 925.0 932.5 938.0 939.4 938.9 940.0 DAY 19 8 31 1 8 23 8 26 24 27 26 2 MIN. QFE PRESSURE IN HPA 931.6 931.8 927.2 926.7 923.9 919.8 918.4 918.7 923.3 927.6 933.5 932.0 918.4 DAY 3 13 10 23 30 30 31 1 12 11 11 15 MEAN QNH PRESSURE IN HPA 1016.6 1017.4 1012.3 1012.7 1009.3 1003.7 1001.3 1002.5 1007.5 1013.8 1017.6 1017.0 1011.0 MAX. QNH PRESSURE IN HPA 1019.6 1021.5 1019.3 1019.5 1013.7 1007.2 1004.1 1005.5 1013.5 1019.4 1020.9 1020.4 1021.5 DAY 19 8 31 1 8 23 8 26 24 27 26 2 MIN. QNH PRESSURE IN HPA 1012.5 1012.8 1007.8 1007.3 1004.3 999.9 998.4 998.7 1003.7 1008.3 1014.6 1013.0 998.4 DAY 3 13 10 23 30 30 31 1 12 11 11 15 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 935.0 935.6 931.0 931.4 928.1 923.0 920.6 921.9 926.4 932.2 936.0 935.4 929.7 MAX. QFE PRESSURE IN HPA 937.7 939.7 938.0 937.5 931.6 926.2 923.1 924.6 931.6 938.4 938.5 939.1 939.7 DAY 19 8 31 1 9 2 8 26 24 27 27 2 MIN. QFE PRESSURE IN HPA 932.1 930.6 925.7 926.1 923.3 919.2 918.0 917.6 922.7 926.7 932.0 932.2 917.6 DAY 3 22 15 23 30 30 31 1 12 11 6 15 MEAN QNH PRESSURE IN HPA 1016.2 1016.8 1011.9 1012.3 1008.8 1003.3 1000.8 1002.1 1007.0 1013.2 1017.2 1016.6 1010.5 MAX. QNH PRESSURE IN HPA 1019.1 1021.2 1019.4 1018.9 1012.5 1006.8 1003.4 1005.1 1012.5 1019.8 1019.9 1020.6 1021.2 DAY 19 8 31 1 9 2 8 26 24 27 27 2 MIN. QNH PRESSURE IN HPA 1013.1 1011.5 1006.2 1006.7 1003.7 999.3 998.0 997.6 1003.0 1007.3 1013.0 1013.2 997.6 DAY 3 22 15 23 30 30 31 1 12 11 6 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 933.5 933.7 929.4 929.9 926.9 921.9 919.5 920.7 925.1 930.7 934.5 934.1 928.3 MAX. QFE PRESSURE IN HPA 936.4 937.6 936.7 935.5 930.9 925.1 922.3 923.1 930.0 935.3 937.3 937.2 937.6 DAY 19 8 31 1 9 22 7 26 24 27 26 2 MIN. QFE PRESSURE IN HPA 930.5 928.5 923.8 924.5 922.0 918.4 916.7 916.5 921.7 925.2 931.1 931.5 916.5 DAY 11 22 15 30 30 30 31 1 5 11 6 15 MEAN QNH PRESSURE IN HPA 1014.6 1014.8 1010.2 1010.7 1007.5 1002.1 999.6 1000.9 1005.6 1011.6 1015.6 1015.2 1009.0 MAX. QNH PRESSURE IN HPA 1017.7 1019.0 1018.0 1016.7 1011.8 1005.6 1002.6 1003.4 1010.8 1016.5 1018.6 1018.5 1019.0 DAY 19 8 31 1 9 22 7 26 24 27 26 2 MIN. QNH PRESSURE IN HPA 1011.4 1009.2 1004.2 1004.9 1002.3 998.4 996.6 996.4 1001.9 1005.7 1012.0 1012.4 996.4 DAY 11 22 15 30 30 30 31 1 5 11 6 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 933.8 934.0 929.6 929.7 926.5 921.5 919.0 920.5 924.9 930.8 934.6 934.2 928.2 MAX. QFE PRESSURE IN HPA 936.5 937.8 936.7 935.0 932.2 925.1 921.7 922.7 930.7 935.3 937.7 937.6 937.8 DAY 18 7 31 1 8 2 8 31 24 27 27 2 MIN. QFE PRESSURE IN HPA 929.6 928.4 923.6 924.1 921.6 918.4 916.4 916.4 921.3 926.0 931.4 931.6 916.4 DAY 11 22 15 23 30 30 30 1 5 10 6 31 MEAN QNH PRESSURE IN HPA 1014.9 1015.1 1010.4 1010.5 1007.0 1001.8 999.0 1000.6 1005.4 1011.7 1015.8 1015.4 1009.0 MAX. QNH PRESSURE IN HPA 1017.8 1019.2 1018.0 1016.2 1013.2 1005.6 1001.9 1003.0 1011.6 1016.5 1019.1 1019.0 1019.2 DAY 18 7 31 1 8 2 8 31 24 27 27 2 MIN. QNH PRESSURE IN HPA 1010.4 1009.1 1004.0 1004.5 1001.8 998.4 996.3 996.3 1001.5 1006.5 1012.3 1012.5 996.3 DAY 11 22 15 23 30 30 30 1 5 10 6 31 MEAN QFF PRESSURE IN HPA 1015.9 1015.7 1009.2 1007.7 1002.4 996.0 992.4 994.4 1000.3 1007.9 1013.9 1015.1 1005.9 MAX. QFF PRESSURE IN HPA 1019.6 1020.2 1018.8 1016.2 1009.1 1000.5 996.0 996.6 1006.9 1013.1 1017.9 1018.9 1020.2 DAY 18 7 31 1 8 2 8 31 24 27 26 18 MIN. QFF PRESSURE IN HPA 1010.1 1008.0 1001.8 1001.4 995.8 991.9 989.7 989.9 995.3 1002.0 1010.0 1012.5 989.7 DAY 11 22 15 23 30 29 30 1 5 10 6 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.7 11.6 17.0 23.2 32.1 35.4 37.0 35.9 32.6 26.6 20.1 14.6 24.6 MINIMUN AIR TEMPERATURE (C) 4.9 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 6.5 ***** DAYS WITH MINIMUM TEMP. >=21 0 **** **** **** **** **** **** **** **** **** **** 0 **** DAYS WITH MINIMUM TEMP. <=-4 0 **** **** **** **** **** **** **** **** **** **** 0 **** DAYS WITH FREEZING MIN.<= 0 3 **** **** **** **** **** **** **** **** **** **** 0 **** TEMPERATURE RECORDS LOWEST(C) 0.0 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 1.0 ***** DAY 11 ** ** ** ** ** ** ** ** ** ** 28 MAXIMUM AIR TEMPERATURE (C) 13.8 16.3 23.0 29.3 38.3 42.1 42.7 42.0 39.5 33.3 27.5 20.9 30.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 18 30 30 31 31 30 30 8 0 208 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.0 22.0 28.0 35.0 43.0 45.0 46.0 46.0 42.0 37.0 31.0 27.0 46.0 DAY 1 19 31 26 21 29 16 14 6 8 2 4 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 14.4 ***** MEAN DAILY TEMP. (MDT) (C) 9.3 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 13.7 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 ****** 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21.8 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 269.0 ****** 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22.4 132.1 ****** DEWPOINT (MEAN C) 3.4 4.3 3.5 6.4 4.8 8.2 10.2 6.1 2.0 1.3 4.3 5.1 5.0 MIXING RATIO (G/KG) 5.32 5.79 5.56 6.81 6.33 8.12 9.28 6.78 5.07 4.72 5.68 5.99 6.29 VAPOUR PRESSURE (HPA) 7.93 8.59 8.25 10.06 9.30 11.85 13.45 9.92 7.46 7.02 8.45 8.92 9.27 SATURATION DEF. (HPA) 4.39 5.56 12.12 20.32 41.75 48.87 52.12 52.04 44.65 29.72 16.59 8.67 28.07 RELATIVE HUMIDITY (MEAN %) 68 65 46 37 22 22 22 18 17 23 39 57 36 RELATIVE HUMIDITY (MAX. %) 88 87 77 59 40 37 36 31 33 43 62 82 56 RELATIVE HUMIDITY (MIN. %) 51 48 27 25 14 14 14 11 9 12 25 38 24 RELATIVE HUMIDITY (MEAN% 03UTC) 87 86 75 59 40 37 34 31 33 43 62 81 56 RELATIVE HUMIDITY (MEAN% 09UTC) 59 57 36 30 17 16 16 14 11 15 29 47 29 RELATIVE HUMIDITY (MEAN% 15UTC) 62 55 34 29 17 19 23 14 13 18 35 48 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 79.0 88.0 4.0 3.0 0.0 0.0 0.0 0.0 0.0 0.0 35.0 36.0 245.0 DAYS WITH PRECIPITATION >=10 4 3 0 0 0 0 0 0 0 0 1 2 10 DAYS WITH PRECIPITATION >= 5 5 4 0 0 0 0 0 0 0 0 1 3 13 DAYS WITH PRECIPITATION >= 1 7 7 2 2 0 0 0 0 0 0 1 4 23 DAYS WITH PRECIPITATION 7 7 2 2 0 0 0 0 0 0 1 5 24 GREATEST DAILY PRECIPITATION 24.0 35.0 2.0 2.0 0.0 0.0 0.0 0.0 0.0 0.0 35.0 16.0 35.0 DAY 28 5 18 3 ** ** ** ** ** ** 28 26 DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 0 0 0 1 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 0 4 3 4 6 4 5 0 1 0 28 WIND DIRECTION (PREVAILING) 135 135 135 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.8 9.4 9.8 11.0 12.7 12.4 13.3 12.0 11.9 11.6 12.2 10.7 11.9 PREVAILING WIND PERCENT 20.6 21.4 18.7 32.0 34.2 38.0 33.5 36.1 35.3 29.7 19.3 14.2 26.6 CALMS PERCENT OF WIND 56.1 40.7 47.1 40.0 47.1 48.0 43.9 49.0 54.0 56.8 62.7 68.4 51.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 167 180 217 252 272 271 261 259 261 262 236 219 252 VECTOR WIND MAGNITUDE(KNOTS) 1.7 2.2 2.1 3.1 5.2 5.4 4.0 4.8 4.5 3.3 2.0 1.3 2.9 WIND STEADINESES (MEAN %) 40.5 37.3 37.5 47.7 78.8 85.7 58.0 82.8 84.9 64.7 48.8 41.9 53.7 WIND SPEED (MEAN KNOTS) 4.2 5.9 5.6 6.5 6.6 6.3 6.9 5.8 5.3 5.1 4.1 3.1 5.4 FASTEST WIND DIRECTION 120 110 310 280 270 300 280 270 260 330 270 270 280 FASTEST WIND SPEED (KNOTS) 14 19 19 29 29 25 25 19 23 29 23 19 29 DAY 1 2 27 5 21 16 2 3 11 29 1 8 DAYS WITH SKY CLEAR (0-2)/8 12 16 17 11 28 30 28 30 30 27 25 21 275 DAYS WITH P.CLOUDY (3-6)/8 9 6 8 16 3 0 3 1 0 4 4 7 61 DAYS WITH CLOUDY (7-8)/8 10 6 6 3 0 0 0 0 0 0 1 3 29 DAYS WITH VISIBILITY =< 2 KM 4 4 1 0 0 0 0 0 0 0 1 1 11 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.1 931.5 932.9 929.3 925.3 921.8 918.9 921.2 924.6 931.7 934.3 934.6 928.4 MAX. QFE PRESSURE IN HPA 941.5 937.3 939.3 933.7 929.3 927.0 924.8 924.6 929.8 936.8 939.8 940.5 941.5 DAY-HOUR 20- 6 1- 6 9- 9 8- 9 8- 6 4- 6 15- 6 16- 6 27- 6 30- 6 14- 6 5- 6 MIN. QFE PRESSURE IN HPA 929.7 925.9 928.0 924.1 919.1 915.9 914.6 917.1 919.9 925.6 927.1 929.2 914.6 DAY-HOUR 4-12 15-15 31-15 15-15 12-12 30-12 1-15 13-12 5-15 1-12 1-12 21-12 MEAN QNH PRESSURE IN HPA 1016.3 1012.4 1013.9 1010.1 1005.8 1002.0 998.9 1001.4 1005.1 1012.6 1015.4 1015.8 1009.1 MAX. QNH PRESSURE IN HPA 1023.1 1018.6 1020.8 1014.8 1010.1 1007.6 1005.3 1005.1 1010.6 1018.1 1021.3 1022.1 1023.1 DAY-HOUR 20- 6 1- 6 9- 9 8- 9 8- 6 4- 6 15- 6 16- 6 27- 6 30- 6 14- 6 5- 6 MIN. QNH PRESSURE IN HPA 1010.5 1006.4 1008.7 1004.5 999.2 995.7 994.4 997.0 1000.0 1006.1 1007.7 1010.0 994.4 DAY-HOUR 4-12 15-15 31-15 15-15 12-12 30-12 1-15 13-12 5-15 1-12 1-12 21-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 934.8 931.3 932.6 929.2 925.4 922.0 919.2 921.4 924.8 931.7 934.4 934.5 928.4 MAX. QFE PRESSURE IN HPA 939.9 936.2 937.1 932.1 928.2 925.6 923.9 923.6 928.8 935.4 939.1 939.1 939.9 DAY 20 1 10 4 8 2 15 16 27 30 24 5 MIN. QFE PRESSURE IN HPA 931.3 926.5 929.4 924.2 921.1 918.2 915.8 918.1 921.1 925.9 928.3 930.2 915.8 DAY 3 10 20 16 30 24 5 14 4 1 2 10 MEAN QNH PRESSURE IN HPA 1016.0 1012.2 1013.6 1010.0 1005.9 1002.3 999.2 1001.6 1005.3 1012.6 1015.5 1015.7 1009.2 MAX. QNH PRESSURE IN HPA 1021.4 1017.5 1018.4 1013.1 1008.9 1006.1 1004.3 1004.0 1009.5 1016.6 1020.6 1020.6 1021.4 DAY 20 1 10 4 8 2 15 16 27 30 24 5 MIN. QNH PRESSURE IN HPA 1012.2 1007.1 1010.2 1004.6 1001.3 998.2 995.6 998.1 1001.3 1006.4 1009.0 1011.0 995.6 DAY 3 10 20 16 30 24 5 14 4 1 2 10 MEAN QFF PRESSURE IN HPA 1016.5 1012.3 1012.5 1007.2 1001.0 996.5 992.7 995.5 1000.2 1009.0 1013.6 1015.1 1006.0 MAX. QFF PRESSURE IN HPA 1023.0 1018.1 1017.2 1011.5 1005.0 1001.1 997.3 998.3 1004.7 1014.0 1018.9 1020.1 1023.0 DAY 20 1 9 8 15 2 15 29 27 30 24 28 MIN. QFF PRESSURE IN HPA 1011.5 1006.2 1009.2 1000.8 996.0 991.9 989.6 991.0 996.3 1001.9 1006.5 1009.8 989.6 DAY 2 10 24 16 21 30 28 14 5 1 2 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.0 932.5 933.9 930.3 926.4 922.7 920.0 922.2 925.8 932.9 935.6 935.8 929.5 MAX. QFE PRESSURE IN HPA 941.5 937.3 938.7 933.5 929.3 927.0 924.8 924.6 929.8 936.8 939.8 940.5 941.5 DAY 20 1 9 8 8 4 15 16 27 30 14 5 MIN. QFE PRESSURE IN HPA 931.7 928.6 930.6 925.9 920.9 918.7 916.5 918.6 921.8 927.7 929.7 931.9 916.5 DAY 2 10 20 16 12 25 5 14 4 1 1 10 MEAN QNH PRESSURE IN HPA 1017.3 1013.6 1015.0 1011.2 1007.0 1003.0 1000.1 1002.5 1006.4 1014.0 1016.8 1017.1 1010.3 MAX. QNH PRESSURE IN HPA 1023.1 1018.6 1020.1 1014.6 1010.1 1007.6 1005.3 1005.1 1010.6 1018.1 1021.3 1022.1 1023.1 DAY 20 1 9 8 8 4 15 16 27 30 14 5 MIN. QNH PRESSURE IN HPA 1012.6 1009.3 1011.5 1006.4 1001.1 998.7 996.4 998.6 1002.1 1008.4 1010.5 1012.9 996.4 DAY 2 10 20 16 12 25 5 14 4 1 1 10 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 936.0 932.4 933.8 930.1 925.9 922.3 919.3 921.7 925.1 932.2 934.9 935.4 929.1 MAX. QFE PRESSURE IN HPA 941.2 936.5 939.3 933.7 928.8 926.5 923.8 923.8 928.8 936.2 938.9 940.2 941.2 DAY 20 8 9 8 7 4 15 11 27 30 14 6 MIN. QFE PRESSURE IN HPA 931.8 927.8 930.2 926.4 920.0 918.1 917.0 918.6 921.5 928.1 929.1 931.6 917.0 DAY 28 10 20 15 12 30 4 13 5 1 1 10 MEAN QNH PRESSURE IN HPA 1017.3 1013.4 1014.9 1010.9 1006.4 1002.6 999.4 1002.0 1005.6 1013.2 1016.1 1016.6 1009.9 MAX. QNH PRESSURE IN HPA 1022.8 1017.8 1020.8 1014.8 1009.5 1007.1 1004.2 1004.2 1009.5 1017.5 1020.4 1021.7 1022.8 DAY 20 8 9 8 7 4 15 11 27 30 14 6 MIN. QNH PRESSURE IN HPA 1012.8 1008.5 1011.0 1007.0 1000.1 998.1 996.9 998.6 1001.7 1008.8 1009.9 1012.5 996.9 DAY 28 10 20 15 12 30 4 13 5 1 1 10 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 934.3 930.5 932.2 928.7 924.5 921.1 918.3 920.4 923.7 930.8 933.3 933.6 927.6 MAX. QFE PRESSURE IN HPA 938.8 934.8 937.7 932.3 928.2 925.0 922.6 922.6 927.8 935.4 937.8 938.5 938.8 DAY 20 8 8 8 7 4 15 11 27 29 14 6 MIN. QFE PRESSURE IN HPA 929.7 926.1 928.5 924.7 919.1 915.9 916.0 917.1 920.1 925.6 927.1 929.2 915.9 DAY 4 15 31 15 12 30 5 13 5 1 1 21 MEAN QNH PRESSURE IN HPA 1015.4 1011.4 1013.2 1009.5 1005.0 1001.3 998.3 1000.6 1004.1 1011.7 1014.3 1014.7 1008.3 MAX. QNH PRESSURE IN HPA 1020.2 1016.0 1019.1 1013.3 1008.9 1005.5 1002.9 1002.9 1008.5 1016.6 1019.2 1019.9 1020.2 DAY 20 8 8 8 7 4 15 11 27 29 14 6 MIN. QNH PRESSURE IN HPA 1010.5 1006.7 1009.2 1005.2 999.2 995.7 995.8 997.0 1000.2 1006.1 1007.7 1010.0 995.7 DAY 4 15 31 15 12 30 5 13 5 1 1 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.5 930.6 931.9 928.4 924.2 920.7 917.8 920.3 923.8 931.0 933.6 934.0 927.6 MAX. QFE PRESSURE IN HPA 939.3 935.0 937.4 931.7 927.4 924.2 921.8 923.2 927.6 935.4 938.3 938.9 939.3 DAY 20 7 9 4 7 1 14 31 26 29 14 5 MIN. QFE PRESSURE IN HPA 929.7 925.9 928.0 924.1 920.2 916.5 914.6 917.5 919.9 926.0 927.6 929.9 914.6 DAY 4 15 31 15 30 30 1 6 5 1 1 10 MEAN QNH PRESSURE IN HPA 1015.6 1011.5 1012.8 1009.1 1004.6 1000.9 997.8 1000.5 1004.2 1011.9 1014.6 1015.1 1008.2 MAX. QNH PRESSURE IN HPA 1020.8 1016.2 1018.7 1012.6 1008.0 1004.6 1002.1 1003.6 1008.3 1016.6 1019.7 1020.4 1020.8 DAY 20 7 9 4 7 1 14 31 26 29 14 5 MIN. QNH PRESSURE IN HPA 1010.5 1006.4 1008.7 1004.5 1000.3 996.4 994.4 997.5 1000.0 1006.5 1008.3 1010.7 994.4 DAY 4 15 31 15 30 30 1 6 5 1 1 10 MEAN QFF PRESSURE IN HPA 1016.2 1011.5 1011.6 1006.2 999.6 994.9 991.1 994.4 999.2 1008.4 1012.8 1014.5 1005.0 MAX. QFF PRESSURE IN HPA 1021.8 1017.0 1017.1 1010.7 1004.0 999.5 995.6 998.0 1003.5 1013.2 1017.8 1019.4 1021.8 DAY 20 12 9 8 8 1 14 31 26 30 22 28 MIN. QFF PRESSURE IN HPA 1010.1 1005.6 1007.2 1000.6 995.0 989.8 987.9 990.1 994.6 1002.4 1005.8 1009.5 987.9 DAY 4 15 31 15 30 30 1 14 5 1 1 10 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.6 12.0 16.0 23.3 28.1 34.3 35.6 35.2 31.3 25.3 19.3 12.7 23.7 MINIMUN AIR TEMPERATURE (C) 6.9 5.7 9.9 13.3 16.9 21.5 23.6 22.9 19.9 16.3 10.4 8.1 14.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 3 18 31 24 13 3 0 0 92 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) 1.0 -1.0 4.0 8.0 11.0 17.0 21.0 16.0 16.0 12.0 7.0 2.0 -1.0 DAY 29 11 8 14 4 1 3 21 26 26 8 30 MAXIMUM AIR TEMPERATURE (C) 16.0 17.1 20.7 29.3 33.8 40.5 42.4 41.6 38.1 31.5 25.4 17.1 29.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 13 29 29 31 31 30 26 3 0 192 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 21.5 29.0 36.0 38.0 43.0 46.0 46.0 43.0 36.0 31.0 22.0 46.0 DAY 1 25 22 25 2 2 30 10 1 13 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 9.1 11.4 10.8 16.0 16.9 19.0 18.8 18.7 18.2 15.2 15.0 9.0 14.9 MEAN DAILY TEMP. (MDT) (C) 11.4 11.4 15.3 21.3 25.4 31.0 33.0 32.3 29.0 23.9 17.9 12.6 22.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 44.5 136.0 270.9 372.7 349.7 241.0 90.5 5.6 0.0 1511.0 HEATING DEG. DAYS(BASE 18 0C) 203.6 184.5 90.3 3.3 0.0 0.0 0.0 0.0 0.0 0.0 29.3 166.5 677.3 DEWPOINT (MEAN C) 5.9 2.8 8.5 5.1 -1.8 -1.5 4.5 5.9 7.2 7.1 3.0 7.5 4.5 MIXING RATIO (G/KG) 6.48 5.42 7.71 6.32 3.90 4.20 5.94 6.64 7.65 7.21 5.22 7.14 6.15 VAPOUR PRESSURE (HPA) 9.63 8.06 11.38 9.34 5.76 6.18 8.69 9.71 11.22 10.66 7.78 10.60 9.08 SATURATION DEF. (HPA) 4.37 6.46 7.48 21.17 34.18 50.92 52.51 49.67 37.00 23.05 15.85 4.54 25.60 RELATIVE HUMIDITY (MEAN %) 71 58 65 38 17 13 17 19 28 37 38 73 40 RELATIVE HUMIDITY (MAX. %) 89 82 86 64 36 28 31 33 50 63 62 92 60 RELATIVE HUMIDITY (MIN. %) 53 38 46 22 9 6 9 11 13 21 22 54 25 RELATIVE HUMIDITY (MEAN% 03UTC) 88 80 83 64 36 28 30 33 49 60 61 87 58 RELATIVE HUMIDITY (MEAN% 09UTC) 64 48 55 28 11 8 11 14 19 27 27 65 31 RELATIVE HUMIDITY (MEAN% 15UTC) 67 50 55 27 11 9 11 12 20 29 28 69 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 150.1 55.0 105.0 9.0 0.0 0.0 0.0 0.0 0.0 31.0 0.0 357.0 707.1 DAYS WITH PRECIPITATION >=10 5 3 4 0 0 0 0 0 0 1 0 7 20 DAYS WITH PRECIPITATION >= 5 5 5 4 0 0 0 0 0 0 3 0 12 29 DAYS WITH PRECIPITATION >= 1 8 6 7 3 0 0 0 0 0 5 0 17 46 DAYS WITH PRECIPITATION 10 6 8 3 0 1 0 0 0 5 0 18 51 GREATEST DAILY PRECIPITATION 60.0 19.0 32.0 4.0 0.0 0.0 0.0 0.0 0.0 14.0 0.0 117.0 117.0 DAY 19 21 7 4 ** ** ** ** ** 2 ** 13 DAY WITH THUNDER STORM 2 5 4 2 0 1 0 0 1 2 0 7 24 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 1 1 2 2 3 1 1 0 0 0 11 WIND DIRECTION (PREVAILING) 135 135 270 270 270 270 270 270 270 270 270 135 270 PREVAILING WIND SPEED(KNOTS) 9.8 9.9 12.1 12.2 13.3 12.5 13.0 12.0 12.2 11.4 9.9 10.8 12.1 PREVAILING WIND PERCENT 22.6 18.6 18.7 31.7 38.1 34.0 38.1 36.8 33.3 27.7 20.7 26.5 25.8 CALMS PERCENT OF WIND 54.8 42.9 53.5 45.5 39.4 44.0 53.5 51.6 51.3 49.7 58.0 49.0 49.5 NO. OF WIND OBSERVATION 155 140 155 145 155 150 155 155 150 155 150 155 1820 VECTOR WIND DIRECTION (MEAN) 159 186 227 262 280 270 269 269 261 259 242 141 252 VECTOR WIND MAGNITUDE(KNOTS) 2.2 2.4 2.5 3.6 6.9 4.7 5.4 5.1 4.4 3.2 2.5 3.6 3.0 WIND STEADINESES (MEAN %) 50.0 40.0 46.3 58.1 87.3 73.4 93.1 92.7 81.5 57.1 62.5 66.7 52.6 WIND SPEED (MEAN KNOTS) 4.4 6.0 5.4 6.2 7.9 6.4 5.8 5.5 5.4 5.6 4.0 5.4 5.7 FASTEST WIND DIRECTION 270 100 270 330 300 100 280 300 270 330 240 150 330 FASTEST WIND SPEED (KNOTS) 23 39 49 29 29 39 23 19 19 87 19 19 87 DAY 25 20 3 9 27 23 7 6 8 1 7 1 DAYS WITH SKY CLEAR (0-2)/8 8 10 10 11 20 28 31 31 30 22 24 8 233 DAYS WITH P.CLOUDY (3-6)/8 13 10 14 13 10 2 0 0 0 6 5 7 80 DAYS WITH CLOUDY (7-8)/8 10 8 7 5 1 0 0 0 0 3 1 16 51 DAYS WITH VISIBILITY =< 2 KM 9 0 4 1 5 0 0 0 1 1 0 14 35 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 933.9 933.8 930.6 929.9 926.5 921.8 918.7 920.3 926.4 931.8 934.7 933.9 928.5 MAX. QFE PRESSURE IN HPA 940.0 942.5 935.9 935.2 930.4 927.3 923.9 924.7 932.2 936.4 939.0 939.1 942.5 DAY-HOUR 28- 6 16- 6 18- 6 18- 6 8- 6 1- 6 2- 6 31- 6 29- 6 19- 6 14- 6 7- 6 MIN. QFE PRESSURE IN HPA 924.9 925.8 924.2 925.1 921.8 915.3 914.6 916.6 920.6 927.2 930.5 928.7 914.6 DAY-HOUR 25-15 28-15 26-15 27-15 28-15 19-12 14-15 1-12 3-12 14-12 8-12 25-12 MEAN QNH PRESSURE IN HPA 1015.0 1014.9 1011.5 1010.7 1007.0 1002.0 998.7 1000.5 1007.0 1012.8 1015.9 1015.0 1009.2 MAX. QNH PRESSURE IN HPA 1021.5 1024.2 1017.1 1016.4 1011.3 1007.9 1004.3 1005.2 1013.2 1017.7 1020.5 1020.6 1024.2 DAY-HOUR 28- 6 16- 6 18- 6 18- 6 8- 6 1- 6 2- 6 31- 6 29- 6 19- 6 14- 6 7- 6 MIN. QNH PRESSURE IN HPA 1005.4 1006.3 1004.6 1005.6 1002.1 995.1 994.4 996.5 1000.8 1007.8 1011.4 1009.4 994.4 DAY-HOUR 25-15 28-15 26-15 27-15 28-15 19-12 14-15 1-12 3-12 14-12 8-12 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 933.7 933.8 930.7 930.1 926.4 922.2 918.9 920.7 926.6 932.0 934.9 933.9 928.7 MAX. QFE PRESSURE IN HPA 938.9 941.8 935.2 934.1 929.6 926.6 923.6 923.3 931.6 935.1 938.2 938.1 941.8 DAY 28 16 18 19 9 1 2 31 29 20 14 8 MIN. QFE PRESSURE IN HPA 928.0 927.2 926.5 926.2 922.6 916.9 915.8 918.3 922.0 928.2 931.3 929.0 915.8 DAY 26 8 26 28 28 19 14 11 3 15 9 22 MEAN QNH PRESSURE IN HPA 1014.8 1014.9 1011.5 1010.9 1007.0 1002.5 999.0 1000.8 1007.2 1013.0 1016.1 1015.0 1009.4 MAX. QNH PRESSURE IN HPA 1020.4 1023.5 1016.4 1015.2 1010.4 1007.2 1004.0 1003.7 1012.5 1016.3 1019.6 1019.5 1023.5 DAY 28 16 18 19 9 1 2 31 29 20 14 8 MIN. QNH PRESSURE IN HPA 1008.7 1007.8 1007.1 1006.8 1002.9 996.8 995.6 998.3 1002.3 1008.9 1012.2 1009.8 995.6 DAY 26 8 26 28 28 19 14 11 3 15 9 22 MEAN QFF PRESSURE IN HPA 1014.7 1014.9 1010.2 1008.0 1002.9 996.9 992.8 994.7 1002.0 1009.3 1014.1 1014.5 1006.2 MAX. QFF PRESSURE IN HPA 1021.2 1023.9 1015.6 1012.0 1006.8 1002.5 998.0 998.1 1008.7 1012.8 1018.6 1018.7 1023.9 DAY 28 16 18 14 8 1 2 31 29 20 27 30 MIN. QFF PRESSURE IN HPA 1009.1 1007.5 1003.6 1002.7 998.2 990.9 989.6 991.5 996.1 1004.0 1008.7 1009.8 989.6 DAY 26 28 23 28 28 19 14 11 3 15 4 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.9 934.9 931.8 931.1 927.5 922.8 919.7 921.4 927.6 933.2 936.0 934.8 929.6 MAX. QFE PRESSURE IN HPA 940.0 942.5 935.9 935.2 930.4 927.3 923.9 924.7 932.2 936.4 939.0 939.1 942.5 DAY 28 16 18 18 8 1 2 31 29 19 14 7 MIN. QFE PRESSURE IN HPA 929.3 928.5 927.9 927.4 923.5 917.3 916.2 918.3 923.6 929.2 931.7 929.8 916.2 DAY 25 8 26 28 28 19 14 1 3 15 9 22 MEAN QNH PRESSURE IN HPA 1016.1 1016.0 1012.8 1012.0 1008.2 1003.1 999.8 1001.7 1008.3 1014.2 1017.3 1016.0 1010.4 MAX. QNH PRESSURE IN HPA 1021.5 1024.2 1017.1 1016.4 1011.3 1007.9 1004.3 1005.2 1013.2 1017.7 1020.5 1020.6 1024.2 DAY 28 16 18 18 8 1 2 31 29 19 14 7 MIN. QNH PRESSURE IN HPA 1010.1 1009.2 1008.6 1008.0 1003.9 997.2 996.1 998.3 1004.0 1010.0 1012.6 1010.6 996.1 DAY 25 8 26 28 28 19 14 1 3 15 9 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 934.7 934.7 931.6 930.7 927.2 922.4 919.3 920.9 927.2 932.6 935.4 934.6 929.3 MAX. QFE PRESSURE IN HPA 939.6 941.8 935.9 934.5 929.7 926.9 923.6 924.3 931.6 936.0 939.0 939.1 941.8 DAY 28 15 18 18 8 1 1 30 29 18 14 7 MIN. QFE PRESSURE IN HPA 928.0 927.9 926.6 927.4 923.5 916.9 916.2 918.5 922.1 929.2 931.8 930.6 916.2 DAY 25 8 26 28 28 19 14 1 3 14 8 22 MEAN QNH PRESSURE IN HPA 1015.9 1015.8 1012.6 1011.6 1007.8 1002.7 999.4 1001.1 1007.8 1013.6 1016.6 1015.8 1010.1 MAX. QNH PRESSURE IN HPA 1021.1 1023.5 1017.1 1015.6 1010.5 1007.5 1004.0 1004.7 1012.5 1017.2 1020.5 1020.6 1023.5 DAY 28 15 18 18 8 1 1 30 29 18 14 7 MIN. QNH PRESSURE IN HPA 1008.7 1008.6 1007.2 1008.0 1003.9 996.8 996.1 998.5 1002.4 1010.0 1012.8 1011.5 996.1 DAY 25 8 26 28 28 19 14 1 3 14 8 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 933.1 932.8 929.7 929.0 925.9 921.0 918.0 919.5 925.4 930.7 933.6 932.9 927.6 MAX. QFE PRESSURE IN HPA 937.9 940.9 933.7 932.9 928.8 925.5 922.1 922.7 929.4 933.7 936.6 938.6 940.9 DAY 28 15 17 19 8 1 2 30 29 18 14 8 MIN. QFE PRESSURE IN HPA 925.2 925.9 924.8 925.9 922.2 915.3 915.3 916.6 920.6 927.2 930.5 928.7 915.3 DAY 25 7 26 9 28 19 13 1 3 14 8 25 MEAN QNH PRESSURE IN HPA 1014.1 1013.9 1010.5 1009.8 1006.5 1001.2 998.0 999.6 1005.9 1011.5 1014.7 1014.0 1008.3 MAX. QNH PRESSURE IN HPA 1019.3 1022.5 1014.8 1013.9 1009.5 1006.0 1002.4 1003.0 1010.2 1014.8 1017.9 1020.0 1022.5 DAY 28 15 17 19 8 1 2 30 29 18 14 8 MIN. QNH PRESSURE IN HPA 1005.7 1006.4 1005.3 1006.4 1002.5 995.1 995.1 996.5 1000.8 1007.8 1011.4 1009.4 995.1 DAY 25 7 26 9 28 19 13 1 3 14 8 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 933.2 933.0 929.4 928.7 925.3 920.5 917.4 919.1 925.3 930.8 933.7 933.2 927.5 MAX. QFE PRESSURE IN HPA 938.2 940.9 933.7 933.2 927.8 925.5 921.2 922.2 930.8 934.0 936.7 938.6 940.9 DAY 28 15 17 18 8 22 1 31 28 19 27 7 MIN. QFE PRESSURE IN HPA 924.9 925.8 924.2 925.1 921.8 915.3 914.6 916.6 920.7 927.2 930.5 928.7 914.6 DAY 25 28 26 27 28 19 14 1 3 14 8 25 MEAN QNH PRESSURE IN HPA 1014.3 1014.0 1010.2 1009.4 1005.8 1000.7 997.3 999.2 1005.8 1011.7 1014.7 1014.2 1008.1 MAX. QNH PRESSURE IN HPA 1019.6 1022.5 1014.8 1014.3 1008.5 1006.0 1001.4 1002.5 1011.7 1015.1 1018.0 1020.0 1022.5 DAY 28 15 17 18 8 22 1 31 28 19 27 7 MIN. QNH PRESSURE IN HPA 1005.4 1006.3 1004.6 1005.6 1002.1 995.1 994.4 996.5 1000.9 1007.8 1011.4 1009.4 994.4 DAY 25 28 26 27 28 19 14 1 3 14 8 25 MEAN QFF PRESSURE IN HPA 1014.1 1014.0 1008.8 1006.5 1001.7 995.1 991.1 993.1 1000.7 1008.0 1012.8 1013.7 1005.0 MAX. QFF PRESSURE IN HPA 1020.4 1023.2 1013.9 1011.1 1004.7 1000.5 995.6 996.7 1007.8 1011.7 1017.0 1018.7 1023.2 DAY 28 15 17 14 8 22 2 30 28 19 27 7 MIN. QFF PRESSURE IN HPA 1005.9 1004.4 1002.1 1001.4 997.4 989.1 988.2 990.1 995.2 1003.5 1008.2 1008.9 988.2 DAY 25 28 26 27 28 19 31 1 3 14 5 25 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.4 10.1 12.9 19.8 27.6 33.5 36.0 35.0 32.3 25.8 ***** ***** ***** MINIMUN AIR TEMPERATURE (C) 2.7 4.5 6.1 11.2 17.9 22.0 24.2 23.2 19.6 12.9 ***** ***** ***** DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 7 27 31 31 7 0 **** **** **** DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 **** **** **** DAYS WITH FREEZING MIN.<= 0 12 4 3 0 0 0 0 0 0 0 **** **** **** TEMPERATURE RECORDS LOWEST(C) -2.0 -2.0 -1.0 5.0 12.0 16.0 21.0 21.0 17.0 8.0 ***** ***** ***** DAY 6 12 12 8 5 26 14 23 13 29 ** ** MAXIMUM AIR TEMPERATURE (C) 11.8 14.7 17.8 25.9 33.8 39.6 42.6 41.7 38.9 32.7 ***** ***** ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 30 30 31 31 30 31 **** **** **** DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 **** **** **** TEMPERATURE RECORDS HIGHEST(C) 16.0 19.0 22.5 32.0 39.0 43.0 45.0 48.0 40.5 37.0 ***** ***** ***** DAY 20 22 30 22 29 12 7 22 3 4 ** ** DIF. BETWEEN (MAX.-MIN.) (C) 9.1 10.2 11.7 14.7 15.9 17.6 18.4 18.5 19.3 19.8 ***** ***** ***** MEAN DAILY TEMP. (MDT) (C) 7.2 9.6 11.9 18.5 25.9 30.8 33.4 32.4 29.3 22.8 ***** ***** ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 10.0 150.7 293.5 384.2 354.7 248.2 63.3 ****** ****** ****** HEATING DEG. DAYS(BASE 18 0C) 313.7 243.2 188.0 29.0 0.0 0.0 0.0 0.0 0.0 0.0 ****** ****** ****** DEWPOINT (MEAN C) 2.5 2.4 4.3 8.2 11.0 5.4 11.0 7.9 1.2 2.4 ***** ***** ***** MIXING RATIO (G/KG) 5.11 5.09 5.90 7.60 9.43 6.23 9.41 7.47 4.79 5.02 ****** ****** ****** VAPOUR PRESSURE (HPA) 7.62 7.56 8.74 11.21 13.84 9.14 13.70 10.94 7.08 7.45 ****** ****** ****** SATURATION DEF. 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OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 **** **** 1525 VECTOR WIND DIRECTION (MEAN) 144 201 221 187 214 280 259 253 257 246 *** *** *** VECTOR WIND MAGNITUDE(KNOTS) 2.6 2.4 2.2 2.0 2.1 4.9 4.6 4.3 4.4 3.1 **** **** **** WIND STEADINESES (MEAN %) 47.3 36.4 38.6 32.8 31.3 76.6 76.7 68.3 71.0 62.0 ***** ***** ***** WIND SPEED (MEAN KNOTS) 5.5 6.6 5.7 6.1 6.7 6.4 6.0 6.3 6.2 5.0 **** **** **** FASTEST WIND DIRECTION 120 280 280 120 260 290 270 270 290 270 *** *** *** FASTEST WIND SPEED (KNOTS) 29 19 17 29 19 29 19 19 19 16 *** *** *** DAY 30 5 27 26 4 26 1 5 17 12 ** ** DAYS WITH SKY CLEAR (0-2)/8 10 15 16 11 17 24 28 31 30 31 **** **** **** DAYS WITH P.CLOUDY (3-6)/8 11 10 10 11 8 6 3 0 0 0 **** **** **** DAYS WITH CLOUDY (7-8)/8 10 4 5 8 6 0 0 0 0 0 **** **** **** DAYS WITH VISIBILITY =< 2 KM 9 4 2 1 3 0 2 2 0 0 **** **** **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.0 933.5 932.6 929.9 928.2 922.9 920.0 922.2 927.0 931.2 ****** ****** ****** MAX. QFE PRESSURE IN HPA 942.0 938.6 938.4 933.9 933.7 928.4 925.6 925.4 932.0 936.7 ****** ****** ****** DAY-HOUR 4- 6 13- 6 13- 6 13- 6 14- 6 6- 6 6- 6 11- 6 21- 6 29- 6 **-** **-** MIN. QFE PRESSURE IN HPA 926.6 927.4 923.6 924.6 923.7 915.5 915.5 917.6 922.1 926.1 ****** ****** ****** DAY-HOUR 30-15 4-12 30-15 17-12 11-15 27-15 19-15 18-12 5-12 6-12 **-** **-** MEAN QNH PRESSURE IN HPA 1016.2 1014.6 1013.6 1010.8 1008.9 1003.2 1000.1 1002.4 1007.6 1012.1 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1023.7 1020.0 1019.8 1015.0 1014.8 1009.1 1006.1 1005.9 1013.0 1018.0 ****** ****** ****** DAY-HOUR 4- 6 13- 6 13- 6 13- 6 14- 6 6- 6 6- 6 11- 6 21- 6 29- 6 **-** **-** MIN. QNH PRESSURE IN HPA 1007.2 1008.0 1004.0 1005.1 1004.1 995.3 995.3 997.6 1002.4 1006.7 ****** ****** ****** DAY-HOUR 30-15 4-12 30-15 17-12 11-15 27-15 19-15 18-12 5-12 6-12 **-** **-** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 935.0 933.4 932.5 930.0 928.2 923.0 920.2 922.4 927.2 931.3 ****** ****** ****** MAX. QFE PRESSURE IN HPA 940.7 937.5 937.3 932.9 932.3 927.3 925.3 924.8 930.8 935.6 ****** ****** ****** DAY 4 13 13 21 14 3 6 16 21 30 ** ** MIN. QFE PRESSURE IN HPA 930.7 927.8 923.7 925.4 925.9 916.6 915.6 919.4 923.8 927.1 ****** ****** ****** DAY 1 4 31 18 4 28 19 1 4 6 ** ** MEAN QNH PRESSURE IN HPA 1016.2 1014.5 1013.5 1010.9 1008.9 1003.3 1000.4 1002.7 1007.8 1012.2 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1022.3 1018.9 1018.6 1013.9 1013.3 1007.9 1005.8 1005.3 1011.7 1016.8 ****** ****** ****** DAY 4 13 13 21 14 3 6 16 21 30 ** ** MIN. QNH PRESSURE IN HPA 1011.6 1008.5 1004.1 1005.9 1006.4 996.5 995.4 999.5 1004.2 1007.7 ****** ****** ****** DAY 1 4 31 18 4 28 19 1 4 6 ** ** MEAN QFF PRESSURE IN HPA 1017.6 1015.0 1013.3 1008.7 1004.6 997.7 994.1 996.7 1002.8 1009.1 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1024.5 1021.4 1019.6 1012.2 1010.1 1002.6 1000.0 998.9 1006.9 1015.2 ****** ****** ****** DAY 5 13 13 21 14 3 6 16 21 29 ** ** MIN. QFF PRESSURE IN HPA 1012.1 1007.1 1002.2 1003.1 1001.6 990.9 988.7 993.0 998.7 1003.8 ****** ****** ****** DAY 31 25 31 18 20 28 19 18 4 6 ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.0 934.4 933.5 930.9 928.9 923.7 920.8 923.1 928.3 932.5 ****** ****** ****** MAX. QFE PRESSURE IN HPA 942.0 938.6 938.4 933.9 933.7 928.4 925.6 925.4 932.0 936.7 ****** ****** ****** DAY 4 13 13 13 14 6 6 11 21 29 ** ** MIN. QFE PRESSURE IN HPA 932.0 928.7 925.0 926.5 926.3 917.5 916.6 920.2 924.8 928.2 ****** ****** ****** DAY 2 25 31 18 4 28 19 2 4 6 ** ** MEAN QNH PRESSURE IN HPA 1017.2 1015.5 1014.6 1011.8 1009.7 1004.1 1001.0 1003.4 1009.0 1013.5 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1023.7 1020.0 1019.8 1015.0 1014.8 1009.1 1006.1 1005.9 1013.0 1018.0 ****** ****** ****** DAY 4 13 13 13 14 6 6 11 21 29 ** ** MIN. QNH PRESSURE IN HPA 1013.0 1009.4 1005.5 1007.1 1006.9 997.5 996.5 1000.3 1005.3 1008.9 ****** ****** ****** DAY 2 25 31 18 4 28 19 2 4 6 ** ** 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 935.8 934.4 933.4 930.6 928.9 923.5 920.5 922.8 927.6 931.6 ****** ****** ****** MAX. QFE PRESSURE IN HPA 941.9 938.6 938.0 933.7 933.5 928.4 925.6 924.8 930.9 935.7 ****** ****** ****** DAY 4 13 13 12 14 6 6 11 26 30 ** ** MIN. QFE PRESSURE IN HPA 930.5 929.6 925.8 926.9 926.8 917.5 916.4 919.4 924.0 927.6 ****** ****** ****** DAY 2 10 31 17 27 28 19 18 4 6 ** ** MEAN QNH PRESSURE IN HPA 1017.0 1015.5 1014.5 1011.5 1009.7 1003.9 1000.6 1003.1 1008.3 1012.6 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1023.6 1020.0 1019.4 1014.8 1014.6 1009.1 1006.1 1005.3 1011.8 1016.9 ****** ****** ****** DAY 4 13 13 12 14 6 6 11 26 30 ** ** MIN. QNH PRESSURE IN HPA 1011.4 1010.4 1006.3 1007.5 1007.4 997.5 996.3 999.5 1004.4 1008.3 ****** ****** ****** DAY 2 10 31 17 27 28 19 18 4 6 ** ** 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 934.1 932.6 932.0 929.2 927.8 922.3 919.3 921.4 925.9 930.2 ****** ****** ****** MAX. QFE PRESSURE IN HPA 939.8 936.5 936.2 931.8 932.1 927.1 924.4 923.3 930.2 934.4 ****** ****** ****** DAY 5 13 13 12 24 2 6 31 21 30 ** ** MIN. QFE PRESSURE IN HPA 927.5 927.4 925.8 924.6 925.1 916.4 915.7 917.6 922.1 926.1 ****** ****** ****** DAY 30 4 31 17 27 27 19 18 5 6 ** ** MEAN QNH PRESSURE IN HPA 1015.2 1013.6 1013.0 1010.0 1008.4 1002.6 999.4 1001.6 1006.5 1011.1 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1021.3 1017.8 1017.5 1012.8 1013.1 1007.7 1004.8 1003.7 1011.0 1015.5 ****** ****** ****** DAY 5 13 13 12 24 2 6 31 21 30 ** ** MIN. QNH PRESSURE IN HPA 1008.2 1008.0 1006.3 1005.1 1005.6 996.3 995.5 997.6 1002.4 1006.7 ****** ****** ****** DAY 30 4 31 17 27 27 19 18 5 6 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.3 932.7 931.6 929.0 927.1 921.9 919.1 921.3 925.9 930.3 ****** ****** ****** MAX. QFE PRESSURE IN HPA 940.6 936.9 936.2 932.4 932.3 927.3 924.8 924.5 930.2 934.5 ****** ****** ****** DAY 5 12 13 20 24 2 6 31 21 30 ** ** MIN. QFE PRESSURE IN HPA 926.6 927.7 923.6 924.6 923.7 915.5 915.5 917.6 922.1 926.1 ****** ****** ****** DAY 30 4 30 17 11 27 19 18 5 6 ** ** MEAN QNH PRESSURE IN HPA 1015.4 1013.7 1012.6 1009.8 1007.7 1002.2 999.2 1001.5 1006.5 1011.1 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1022.2 1018.2 1017.5 1013.4 1013.3 1007.9 1005.3 1004.9 1011.0 1015.6 ****** ****** ****** DAY 5 12 13 20 24 2 6 31 21 30 ** ** MIN. QNH PRESSURE IN HPA 1007.2 1008.4 1004.0 1005.1 1004.1 995.3 995.3 997.6 1002.4 1006.7 ****** ****** ****** DAY 30 4 30 17 11 27 19 18 5 6 ** ** MEAN QFF PRESSURE IN HPA 1016.7 1014.3 1012.3 1007.6 1003.3 996.5 992.8 995.6 1001.5 1008.0 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1025.1 1020.7 1018.4 1011.4 1008.6 1002.8 999.2 1000.0 1006.2 1013.4 ****** ****** ****** DAY 5 12 12 8 24 2 6 31 21 30 ** ** MIN. QFF PRESSURE IN HPA 1008.1 1007.7 1002.8 1003.0 999.7 989.7 988.4 991.1 997.5 1002.9 ****** ****** ****** DAY 2 4 30 17 11 27 19 18 5 6 ** ** 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 DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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ANNUAL AIR TEMPERATURE (C) 11.5 11.6 15.8 22.8 27.5 32.6 34.2 33.4 29.7 24.0 16.6 9.2 22.4 MINIMUN AIR TEMPERATURE (C) 5.4 4.8 9.7 15.1 18.7 22.7 25.5 24.6 21.6 16.9 12.1 4.4 15.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 9 27 30 31 21 0 0 0 120 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 4 4 TEMPERATURE RECORDS LOWEST(C) 1.4 0.8 5.0 8.6 12.0 19.4 19.2 22.0 18.0 14.2 7.6 -1.6 -1.6 DAY 28 7 17 3 2 30 1 25 23 24 27 8 MAXIMUM AIR TEMPERATURE (C) 18.5 18.2 22.3 30.1 34.5 40.4 41.0 41.2 37.0 31.0 22.2 14.9 29.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 16 28 30 31 31 30 23 1 0 190 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.5 25.0 28.5 38.6 41.8 44.2 43.6 45.0 40.2 34.8 30.0 18.2 45.0 DAY 1 28 31 29 31 9 12 9 3 1 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 13.1 13.4 12.6 15.0 15.8 17.7 15.5 16.6 15.4 14.1 10.1 10.5 14.2 MEAN DAILY TEMP. (MDT) (C) 11.9 11.5 16.0 22.6 26.6 31.5 33.2 32.9 29.3 24.0 17.2 9.6 22.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 68.4 173.5 315.3 379.1 368.7 250.0 92.3 6.7 0.0 1654.1 HEATING DEG. DAYS(BASE 18 0C) 188.6 181.6 67.3 3.7 0.0 0.0 0.0 0.0 0.0 0.0 47.1 259.1 747.3 DEWPOINT (MEAN C) 3.2 -0.5 3.6 4.8 2.5 2.2 8.6 6.9 5.5 8.4 9.7 4.4 4.9 MIXING RATIO (G/KG) 5.32 4.11 5.58 6.02 5.39 5.03 7.85 7.29 6.28 7.75 8.27 5.83 6.23 VAPOUR PRESSURE (HPA) 7.92 6.12 8.28 8.91 7.96 7.38 11.43 10.64 9.28 11.48 12.26 8.69 9.20 SATURATION DEF. (HPA) 6.34 8.22 10.41 20.49 30.78 44.19 44.15 42.92 34.10 19.53 7.31 3.37 22.65 RELATIVE HUMIDITY (MEAN %) 62 48 49 36 25 17 22 22 24 42 68 75 41 RELATIVE HUMIDITY (MAX. %) 85 74 75 59 45 31 35 36 38 64 87 92 60 RELATIVE HUMIDITY (MIN. %) 36 25 26 19 11 8 14 12 12 21 45 48 23 RELATIVE HUMIDITY (MEAN% 03UTC) 79 70 70 56 42 30 35 34 37 60 81 88 57 RELATIVE HUMIDITY (MEAN% 09UTC) 41 34 35 24 15 9 16 14 13 26 51 54 28 RELATIVE HUMIDITY (MEAN% 15UTC) 54 33 34 24 15 10 16 16 18 33 66 72 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 51.8 1.4 38.4 15.3 19.4 0.0 0.0 0.0 0.9 22.4 324.9 78.4 552.9 DAYS WITH PRECIPITATION >=10 2 0 2 1 0 0 0 0 0 1 6 3 15 DAYS WITH PRECIPITATION >= 5 4 0 4 1 2 0 0 0 0 1 11 5 28 DAYS WITH PRECIPITATION >= 1 6 1 5 2 4 0 0 0 0 1 11 11 41 DAYS WITH PRECIPITATION 6 2 5 4 5 0 0 0 2 3 12 11 50 GREATEST DAILY PRECIPITATION 24.0 1.0 11.0 11.0 9.0 0.0 0.0 0.0 0.6 22.0 109.0 18.5 109.0 DAY 23 1 11 2 10 ** ** ** 22 18 17 1 DAY WITH THUNDER STORM 2 0 1 3 5 0 0 0 0 0 10 6 27 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 2 2 8 0 2 7 3 0 0 0 24 WIND DIRECTION (PREVAILING) 90 270 270 270 270 270 270 270 270 270 135 270 270 PREVAILING WIND SPEED(KNOTS) 7.2 7.3 7.7 7.6 8.3 8.2 7.6 9.0 9.5 9.3 9.7 6.6 8.2 PREVAILING WIND PERCENT 10.5 20.5 10.5 20.8 21.8 32.9 46.4 34.7 30.8 25.8 18.3 12.5 22.4 CALMS PERCENT OF WIND 72.6 61.6 69.4 63.3 52.8 52.5 49.2 58.9 51.3 56.0 55.4 59.3 58.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 129 232 177 250 277 278 273 271 264 265 123 160 255 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.8 0.8 1.3 2.1 3.0 3.7 3.3 2.8 2.2 2.2 1.1 1.4 WIND STEADINESES (MEAN %) 62.5 26.7 33.3 44.8 47.7 71.4 94.9 89.2 62.2 56.4 53.7 37.9 40.0 WIND SPEED (MEAN KNOTS) 1.6 3.0 2.4 2.9 4.4 4.2 3.9 3.7 4.5 3.9 4.1 2.9 3.5 FASTEST WIND DIRECTION 110 110 120 260 290 270 280 270 30 290 110 70 110 FASTEST WIND SPEED (KNOTS) 16 35 21 17 25 23 21 21 35 17 27 14 35 DAY 23 28 7 13 4 4 19 1 10 3 16 3 DAYS WITH SKY CLEAR (0-2)/8 14 17 18 16 23 30 30 31 23 21 9 17 249 DAYS WITH P.CLOUDY (3-6)/8 11 10 9 11 4 0 1 0 7 7 11 6 77 DAYS WITH CLOUDY (7-8)/8 6 1 4 3 4 0 0 0 0 3 10 8 39 DAYS WITH VISIBILITY =< 2 KM 3 2 1 1 0 0 0 0 0 1 1 5 14 DURATION OF SUNSHINE HOURS 187.6 237.0 238.7 256.4 305.8 366.7 ****** 334.2 290.5 250.3 137.6 181.7 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.7 933.1 932.5 930.4 928.4 921.3 918.3 920.7 928.1 933.3 935.3 937.7 929.5 MAX. QFE PRESSURE IN HPA 942.8 937.8 938.3 936.5 934.2 924.9 921.4 926.0 935.9 940.4 939.8 941.3 942.8 DAY-HOUR 28- 9 26- 6 18- 6 16- 6 8- 6 1- 6 3- 0 15- 6 24- 6 18- 6 10- 6 6- 6 MIN. QFE PRESSURE IN HPA 927.4 926.7 923.8 924.9 922.8 917.2 914.7 915.7 920.0 929.0 930.2 927.1 914.7 DAY-HOUR 23-18 12- 0 12- 3 30-12 27-15 27-15 12-12 1-15 1-12 5-12 16-21 3-15 MEAN QNH PRESSURE IN HPA 1015.9 1014.1 1013.5 1011.3 1009.1 1001.5 998.3 1000.9 1008.8 1014.3 1016.4 1019.1 1010.3 MAX. QNH PRESSURE IN HPA 1024.5 1019.2 1019.7 1017.8 1015.3 1005.4 1001.6 1006.5 1017.1 1022.0 1021.3 1022.9 1024.5 DAY-HOUR 28- 9 26- 6 18- 6 16- 6 8- 6 1- 6 3- 0 15- 6 24- 6 18- 6 10- 6 6- 6 MIN. QNH PRESSURE IN HPA 1008.0 1007.3 1004.2 1005.4 1003.1 997.1 994.5 995.5 1000.1 1009.8 1011.0 1007.7 994.5 DAY-HOUR 23-18 12- 0 12- 3 30-12 27-15 27-15 12-12 1-15 1-12 5-12 16-21 3-15 MEAN QFF PRESSURE IN HPA 1015.6 1013.8 1011.8 1007.7 1004.3 995.3 991.5 994.3 1003.3 1010.3 1014.4 1019.4 1006.8 MAX. QFF PRESSURE IN HPA 1025.2 1018.9 1018.5 1014.5 1011.8 999.2 995.2 1000.0 1012.3 1018.5 1019.4 1024.8 1025.2 DAY-HOUR 28- 6 4- 6 18- 6 16- 6 8- 3 6- 6 3- 0 15- 6 24- 6 18- 6 10- 6 6- 6 MIN. QFF PRESSURE IN HPA 1007.9 1005.3 1002.1 999.7 997.7 991.5 987.1 989.2 993.9 1005.2 1008.9 1006.0 987.1 DAY-HOUR 23-18 12- 0 12- 3 30-12 27-15 28- 0 12-12 1-12 1-12 5-12 16-21 3-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 934.5 932.7 932.2 930.2 928.2 921.2 918.3 920.6 927.7 932.8 934.9 937.4 929.2 MAX. QFE PRESSURE IN HPA 939.9 937.0 936.4 934.8 934.0 924.6 921.4 923.9 934.7 935.9 937.6 940.2 940.2 DAY 29 26 19 17 8 1 3 15 24 11 2 6 MIN. QFE PRESSURE IN HPA 928.0 926.7 925.0 927.2 924.0 917.9 915.3 916.7 920.5 929.8 931.2 928.6 915.3 DAY 24 12 12 13 28 28 15 1 2 6 17 4 MEAN QNH PRESSURE IN HPA 1015.7 1013.7 1013.2 1011.0 1008.9 1001.4 998.3 1000.7 1008.4 1013.8 1016.1 1018.7 1010.0 MAX. QNH PRESSURE IN HPA 1021.4 1018.3 1017.7 1016.0 1015.1 1005.1 1001.6 1004.3 1015.9 1017.1 1019.0 1021.7 1021.7 DAY 29 26 19 17 8 1 3 15 24 11 2 6 MIN. QNH PRESSURE IN HPA 1008.7 1007.3 1005.5 1007.8 1004.4 997.9 995.1 996.6 1000.7 1010.6 1012.1 1009.3 995.1 DAY 24 12 12 13 28 28 15 1 2 6 17 4 MEAN QFF PRESSURE IN HPA 1015.1 1013.2 1011.4 1007.3 1004.0 995.1 991.5 994.1 1002.8 1009.6 1013.9 1018.9 1006.4 MAX. QFF PRESSURE IN HPA 1022.0 1017.7 1016.2 1013.0 1011.4 998.9 995.2 997.6 1010.7 1014.1 1016.9 1023.4 1023.4 DAY 28 26 19 17 8 1 3 15 24 19 20 6 MIN. QFF PRESSURE IN HPA 1008.4 1005.3 1003.3 1003.2 998.4 991.5 987.5 989.7 994.6 1006.0 1010.1 1008.5 987.5 DAY 24 12 12 30 28 28 15 1 2 6 17 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 935.0 933.1 932.6 930.8 928.7 921.5 918.6 920.9 928.2 933.5 935.3 937.5 929.6 MAX. QFE PRESSURE IN HPA 941.2 937.0 937.2 935.4 933.8 924.7 920.7 923.8 935.1 937.4 938.1 940.3 941.2 DAY 28 26 18 16 8 1 4 15 24 18 10 22 MIN. QFE PRESSURE IN HPA 929.6 927.2 923.8 927.6 925.0 918.9 916.0 917.3 920.4 930.4 932.0 928.6 916.0 DAY 24 12 12 13 28 28 15 1 1 6 17 4 MEAN QNH PRESSURE IN HPA 1016.2 1014.1 1013.6 1011.7 1009.4 1001.7 998.6 1001.1 1008.9 1014.6 1016.5 1018.9 1010.5 MAX. QNH PRESSURE IN HPA 1022.8 1018.3 1018.5 1016.6 1014.9 1005.2 1000.9 1004.2 1016.3 1018.7 1019.5 1021.9 1022.8 DAY 28 26 18 16 8 1 4 15 24 18 10 22 MIN. QNH PRESSURE IN HPA 1010.4 1007.8 1004.2 1008.3 1005.5 999.0 995.8 997.2 1000.6 1011.3 1013.0 1009.3 995.8 DAY 24 12 12 13 28 28 15 1 1 6 17 4 MEAN QFF PRESSURE IN HPA 1016.2 1014.1 1012.3 1008.5 1005.0 996.0 992.3 995.0 1004.0 1011.1 1014.8 1019.6 1007.4 MAX. QFF PRESSURE IN HPA 1024.3 1018.2 1017.4 1013.3 1011.8 999.1 995.0 998.0 1012.3 1015.5 1018.3 1023.9 1024.3 DAY 28 26 18 6 8 1 1 15 24 20 10 6 MIN. QFF PRESSURE IN HPA 1010.5 1006.2 1002.1 1003.8 999.8 993.0 988.7 990.9 995.1 1007.4 1011.5 1008.4 988.7 DAY 24 12 12 30 31 28 15 1 1 3 17 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.0 934.1 933.9 931.6 929.6 922.1 919.1 921.7 929.3 934.7 936.5 938.7 930.6 MAX. QFE PRESSURE IN HPA 942.4 937.8 938.3 936.5 934.2 924.9 921.4 926.0 935.9 940.4 939.8 941.3 942.4 DAY 28 26 18 16 8 1 24 15 24 18 10 6 MIN. QFE PRESSURE IN HPA 930.7 928.8 925.7 928.1 925.7 919.6 916.0 917.5 921.2 930.8 932.7 930.7 916.0 DAY 24 12 12 26 27 25 12 1 1 6 17 4 MEAN QNH PRESSURE IN HPA 1017.3 1015.2 1015.0 1012.5 1010.4 1002.4 999.1 1001.9 1010.0 1015.9 1017.8 1020.1 1011.5 MAX. QNH PRESSURE IN HPA 1024.1 1019.2 1019.7 1017.8 1015.3 1005.4 1001.6 1006.5 1017.1 1022.0 1021.3 1022.9 1024.1 DAY 28 26 18 16 8 1 24 15 24 18 10 6 MIN. QNH PRESSURE IN HPA 1011.6 1009.5 1006.2 1008.8 1006.2 999.7 995.8 997.5 1001.4 1011.7 1013.7 1011.6 995.8 DAY 24 12 12 26 27 25 12 1 1 6 17 4 MEAN QFF PRESSURE IN HPA 1017.2 1015.0 1013.4 1008.9 1005.4 995.9 992.2 995.3 1004.5 1011.8 1015.9 1020.6 1008.0 MAX. QFF PRESSURE IN HPA 1025.2 1018.9 1018.5 1014.5 1011.6 999.2 995.0 1000.0 1012.3 1018.5 1019.4 1024.8 1025.2 DAY 28 4 18 16 8 6 24 15 24 18 10 6 MIN. QFF PRESSURE IN HPA 1011.5 1007.8 1004.4 1004.3 999.8 993.0 988.4 990.6 995.3 1007.4 1012.1 1010.7 988.4 DAY 24 12 12 30 31 25 12 1 1 6 17 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 935.3 933.6 933.3 931.0 929.2 921.8 918.7 921.0 928.5 933.7 935.7 938.2 930.0 MAX. QFE PRESSURE IN HPA 942.8 937.4 937.7 936.1 933.9 924.3 921.1 924.9 934.7 937.4 938.7 940.9 942.8 DAY 28 26 18 16 15 1 24 15 24 19 10 6 MIN. QFE PRESSURE IN HPA 930.1 928.4 925.1 927.3 925.2 919.1 915.9 917.2 920.9 930.3 931.9 930.1 915.9 DAY 24 12 12 30 28 27 12 1 1 6 17 4 MEAN QNH PRESSURE IN HPA 1016.5 1014.7 1014.3 1011.9 1009.9 1002.0 998.7 1001.2 1009.2 1014.8 1016.9 1019.6 1010.8 MAX. QNH PRESSURE IN HPA 1024.5 1018.7 1019.1 1017.4 1015.0 1004.7 1001.3 1005.4 1015.9 1018.7 1020.1 1022.5 1024.5 DAY 28 26 18 16 15 1 24 15 24 19 10 6 MIN. QNH PRESSURE IN HPA 1010.9 1009.1 1005.6 1007.9 1005.7 999.2 995.7 997.1 1001.1 1011.2 1012.9 1010.9 995.7 DAY 24 12 12 30 28 27 12 1 1 6 17 4 MEAN QFF PRESSURE IN HPA 1015.8 1014.0 1012.4 1008.1 1004.8 995.5 991.7 994.3 1003.4 1010.5 1014.7 1019.6 1007.1 MAX. QFF PRESSURE IN HPA 1025.1 1017.9 1017.6 1014.1 1010.1 998.7 994.3 998.5 1010.8 1015.4 1018.0 1024.0 1025.1 DAY 28 3 18 16 8 6 24 15 24 19 10 6 MIN. QFF PRESSURE IN HPA 1010.7 1007.5 1003.3 1002.3 999.3 992.6 988.0 990.1 994.6 1006.4 1010.9 1009.5 988.0 DAY 24 12 12 30 28 27 14 1 1 6 17 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 933.9 932.2 931.5 929.7 927.8 920.8 917.8 920.0 927.0 932.3 934.7 937.0 928.7 MAX. QFE PRESSURE IN HPA 940.1 936.0 935.9 935.6 932.6 923.1 920.3 923.3 933.2 936.4 937.8 939.9 940.1 DAY 28 25 18 16 14 1 5 15 23 18 10 21 MIN. QFE PRESSURE IN HPA 929.0 928.0 924.7 924.9 923.6 918.0 914.7 916.2 920.0 929.0 930.8 928.3 914.7 DAY 16 12 12 30 27 27 12 1 1 5 17 3 MEAN QNH PRESSURE IN HPA 1015.0 1013.2 1012.4 1010.5 1008.5 1001.0 997.8 1000.1 1007.7 1013.3 1015.9 1018.3 1009.5 MAX. QNH PRESSURE IN HPA 1021.6 1017.2 1017.1 1016.8 1013.6 1003.4 1000.5 1003.7 1014.3 1017.7 1019.2 1021.4 1021.6 DAY 28 25 18 16 14 1 5 15 23 18 10 21 MIN. QNH PRESSURE IN HPA 1009.8 1008.7 1005.2 1005.4 1004.0 998.0 994.5 996.1 1000.1 1009.8 1011.7 1009.0 994.5 DAY 16 12 12 30 27 27 12 1 1 5 17 3 MEAN QFF PRESSURE IN HPA 1014.5 1012.7 1010.7 1006.8 1003.7 994.8 990.9 993.6 1002.1 1009.2 1013.8 1018.5 1005.9 MAX. QFF PRESSURE IN HPA 1022.0 1016.6 1015.6 1013.8 1008.8 997.5 993.7 997.0 1009.5 1014.4 1017.2 1022.9 1022.9 DAY 28 25 18 16 14 6 5 15 23 19 10 6 MIN. QFF PRESSURE IN HPA 1009.2 1007.0 1003.1 999.7 998.0 991.7 987.1 989.2 993.9 1005.2 1009.8 1007.6 987.1 DAY 16 12 12 30 27 27 12 1 1 5 17 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.2 932.4 931.4 929.5 927.4 920.3 917.5 919.9 927.2 932.5 934.8 937.3 928.7 MAX. QFE PRESSURE IN HPA 939.7 936.1 935.6 935.6 932.3 922.2 920.1 923.0 933.7 936.4 938.5 939.9 939.9 DAY 28 25 18 16 14 4 3 15 23 18 10 6 MIN. QFE PRESSURE IN HPA 928.5 927.8 925.7 925.3 922.8 917.2 914.7 915.7 920.0 929.0 930.4 927.1 914.7 DAY 23 11 12 30 27 27 12 1 1 5 25 3 MEAN QNH PRESSURE IN HPA 1015.3 1013.4 1012.4 1010.3 1008.0 1000.5 997.4 1000.0 1007.9 1013.5 1015.9 1018.6 1009.4 MAX. QNH PRESSURE IN HPA 1021.2 1017.4 1016.8 1016.8 1013.3 1002.5 1000.2 1003.3 1014.8 1017.7 1019.9 1021.4 1021.4 DAY 28 25 18 16 14 4 3 15 23 18 10 6 MIN. QNH PRESSURE IN HPA 1009.2 1008.5 1006.2 1005.8 1003.1 997.1 994.5 995.5 1000.1 1009.8 1011.3 1007.7 994.5 DAY 23 11 12 30 27 27 12 1 1 5 25 3 MEAN QFF PRESSURE IN HPA 1015.3 1013.4 1011.0 1007.1 1003.7 994.8 991.1 994.0 1002.9 1010.0 1014.1 1019.3 1006.4 MAX. QFF PRESSURE IN HPA 1022.2 1017.4 1015.7 1013.8 1009.4 997.2 994.3 997.3 1010.7 1014.8 1018.8 1023.4 1023.4 DAY 28 25 18 16 8 6 3 14 23 18 10 6 MIN. QFF PRESSURE IN HPA 1008.9 1008.0 1004.4 1000.6 997.7 991.6 987.7 989.2 994.6 1006.1 1009.3 1006.0 987.7 DAY 23 11 12 30 27 27 12 1 1 5 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 934.7 933.3 932.4 930.3 928.2 921.3 918.3 920.9 928.4 933.3 935.3 937.8 929.5 MAX. QFE PRESSURE IN HPA 940.3 937.0 936.7 935.4 932.7 923.3 921.4 924.3 934.7 936.8 938.5 940.9 940.9 DAY 28 25 18 16 7 1 3 15 23 18 10 21 MIN. QFE PRESSURE IN HPA 927.4 928.4 926.4 926.2 924.1 918.3 915.6 917.0 921.4 929.7 930.4 927.9 915.6 DAY 23 11 11 30 27 27 10 1 2 5 25 3 MEAN QNH PRESSURE IN HPA 1015.8 1014.4 1013.4 1011.2 1008.9 1001.5 998.3 1001.1 1009.1 1014.4 1016.5 1019.1 1010.3 MAX. QNH PRESSURE IN HPA 1021.9 1018.3 1018.0 1016.6 1013.7 1003.7 1001.6 1004.7 1015.9 1018.1 1019.9 1022.5 1022.5 DAY 28 25 18 16 7 1 3 15 23 18 10 21 MIN. QNH PRESSURE IN HPA 1008.0 1009.1 1007.0 1006.8 1004.5 998.3 995.4 996.9 1001.6 1010.5 1011.3 1008.6 995.4 DAY 23 11 11 30 27 27 10 1 2 5 25 3 MEAN QFF PRESSURE IN HPA 1015.7 1014.2 1011.8 1007.5 1003.9 995.0 991.3 994.5 1003.5 1010.3 1014.6 1019.6 1006.8 MAX. QFF PRESSURE IN HPA 1022.9 1018.0 1016.7 1013.6 1010.1 997.4 994.9 998.1 1011.1 1015.4 1018.2 1023.6 1023.6 DAY 28 25 18 16 7 6 3 15 23 18 10 6 MIN. QFF PRESSURE IN HPA 1007.9 1008.0 1005.5 1001.3 997.8 991.9 987.7 990.0 995.5 1006.2 1009.3 1006.9 987.7 DAY 23 11 11 30 30 27 14 1 2 5 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 934.6 933.4 932.5 930.5 928.5 921.5 918.5 921.0 928.4 933.2 935.0 937.8 929.6 MAX. QFE PRESSURE IN HPA 940.1 937.2 936.6 935.4 933.8 923.7 921.4 924.0 934.7 936.3 938.0 940.7 940.7 DAY 27 25 18 16 7 1 3 14 23 18 9 5 MIN. QFE PRESSURE IN HPA 928.0 928.2 925.4 926.0 924.6 918.2 915.8 917.0 921.2 929.8 930.2 927.9 915.8 DAY 23 11 11 30 27 27 14 1 1 5 16 3 MEAN QNH PRESSURE IN HPA 1015.7 1014.4 1013.5 1011.3 1009.2 1001.7 998.5 1001.2 1009.1 1014.3 1016.1 1019.2 1010.4 MAX. QNH PRESSURE IN HPA 1021.6 1018.5 1017.9 1016.6 1014.9 1004.1 1001.6 1004.4 1015.9 1017.6 1019.4 1022.3 1022.3 DAY 27 25 18 16 7 1 3 14 23 18 9 5 MIN. QNH PRESSURE IN HPA 1008.7 1008.9 1005.9 1006.5 1005.1 998.2 995.6 996.9 1001.4 1010.6 1011.0 1008.6 995.6 DAY 23 11 11 30 27 27 14 1 1 5 16 3 MEAN QFF PRESSURE IN HPA 1015.0 1013.7 1011.6 1007.4 1004.0 995.2 991.4 994.3 1003.2 1009.9 1013.9 1019.2 1006.6 MAX. QFF PRESSURE IN HPA 1022.3 1017.7 1016.3 1013.6 1011.2 997.7 994.7 997.5 1010.6 1014.8 1017.2 1023.8 1023.8 DAY 27 20 18 16 7 5 3 14 23 18 19 5 MIN. QFF PRESSURE IN HPA 1008.8 1007.3 1003.9 1000.7 998.5 991.5 987.6 989.5 994.6 1005.9 1008.9 1007.1 987.6 DAY 23 11 11 30 31 27 14 9 2 5 16 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.8 11.2 13.8 18.6 27.1 31.8 33.5 34.5 29.5 23.5 16.9 10.4 21.8 MINIMUN AIR TEMPERATURE (C) 5.8 6.2 7.7 11.2 17.8 21.2 24.8 25.1 20.1 14.6 9.0 6.1 14.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 8 14 29 31 15 0 0 0 97 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 2 0 2 TEMPERATURE RECORDS LOWEST(C) 0.6 2.0 2.4 6.4 11.0 19.0 20.0 22.2 16.0 10.0 0.0 1.0 0.0 DAY 23 11 28 7 11 1 1 24 22 15 27 16 MAXIMUM AIR TEMPERATURE (C) 16.9 16.5 20.1 26.1 35.2 39.7 41.2 43.2 37.8 32.1 25.7 16.2 29.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 31 30 31 31 30 25 3 0 182 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.8 21.0 25.0 31.0 39.6 43.6 45.6 46.8 43.0 36.0 30.6 19.6 46.8 DAY 7 3 31 30 23 19 31 8 1 3 4 2 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 10.3 12.4 14.9 17.4 18.5 16.4 18.1 17.7 17.5 16.7 10.1 15.1 MEAN DAILY TEMP. (MDT) (C) 11.4 11.3 13.9 18.7 26.5 30.4 33.0 34.1 29.0 23.4 17.4 11.1 21.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.6 170.3 283.2 372.2 407.4 239.4 76.7 2.9 0.0 1554.9 HEATING DEG. DAYS(BASE 18 0C) 205.6 186.6 127.0 14.5 0.0 0.0 0.0 0.0 0.0 0.0 53.7 213.3 800.4 DEWPOINT (MEAN C) 6.2 7.2 7.3 9.0 6.3 6.9 11.8 7.0 4.5 1.0 0.2 5.4 6.1 MIXING RATIO (G/KG) 6.45 6.97 7.13 8.01 6.65 6.96 10.06 7.46 5.99 4.76 4.55 6.20 6.77 VAPOUR PRESSURE (HPA) 9.61 10.34 10.57 11.83 9.82 10.21 14.59 10.89 8.84 7.07 6.78 9.23 9.98 SATURATION DEF. (HPA) 3.74 3.32 5.79 10.65 28.14 39.18 39.17 46.58 34.79 23.64 14.02 3.74 21.06 RELATIVE HUMIDITY (MEAN %) 76 79 69 59 31 24 30 22 23 27 37 75 46 RELATIVE HUMIDITY (MAX. %) 93 95 91 86 54 39 46 39 40 47 60 91 65 RELATIVE HUMIDITY (MIN. %) 49 56 45 33 15 12 16 9 11 11 16 50 27 RELATIVE HUMIDITY (MEAN% 03UTC) 90 92 89 83 52 38 45 35 38 45 54 87 62 RELATIVE HUMIDITY (MEAN% 09UTC) 59 60 52 40 17 15 20 10 12 14 20 54 31 RELATIVE HUMIDITY (MEAN% 15UTC) 72 73 58 43 20 17 24 17 18 21 31 70 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.2 227.3 62.4 75.2 0.5 0.0 0.0 0.0 0.0 0.0 0.0 110.8 511.4 DAYS WITH PRECIPITATION >=10 1 5 3 2 0 0 0 0 0 0 0 3 14 DAYS WITH PRECIPITATION >= 5 3 7 4 4 0 0 0 0 0 0 0 5 23 DAYS WITH PRECIPITATION >= 1 6 9 9 7 0 0 0 0 0 0 0 7 38 DAYS WITH PRECIPITATION 6 12 10 7 2 0 0 0 0 0 0 9 46 GREATEST DAILY PRECIPITATION 15.0 104.0 21.0 27.7 0.3 0.0 0.0 0.0 0.0 0.0 0.0 40.0 104.0 DAY 12 5 20 23 25 ** ** ** ** ** ** 4 DAY WITH THUNDER STORM 1 3 2 5 4 1 0 0 0 1 0 0 17 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 0 1 1 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 135 270 270 270 270 270 270 270 270 270 270 135 270 PREVAILING WIND SPEED(KNOTS) 6.5 8.4 8.0 8.2 8.5 10.7 10.4 10.4 11.3 10.5 9.2 8.1 9.7 PREVAILING WIND PERCENT 13.7 17.0 19.8 17.9 22.6 32.5 41.5 26.6 32.9 23.0 17.5 11.3 22.7 CALMS PERCENT OF WIND 64.5 55.8 62.1 57.5 52.8 48.3 50.4 54.8 54.2 59.3 71.7 69.4 58.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 173 176 234 179 278 286 275 263 276 265 255 193 261 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.2 1.0 0.9 1.8 4.4 4.7 2.8 4.2 2.2 1.4 1.1 1.8 WIND STEADINESES (MEAN %) 44.0 33.3 34.5 23.7 45.0 84.6 94.0 59.6 84.0 56.4 60.9 45.8 47.4 WIND SPEED (MEAN KNOTS) 2.5 3.6 2.9 3.8 4.0 5.2 5.0 4.7 5.0 3.9 2.3 2.4 3.8 FASTEST WIND DIRECTION 270 120 260 270 320 340 290 290 270 270 140 120 320 FASTEST WIND SPEED (KNOTS) 17 17 17 27 29 21 19 19 27 23 17 23 29 DAY 1 4 26 5 20 9 11 7 17 7 8 11 DAYS WITH SKY CLEAR (0-2)/8 17 12 15 9 18 29 30 29 29 27 25 14 254 DAYS WITH P.CLOUDY (3-6)/8 7 9 7 13 12 1 1 2 1 4 5 9 71 DAYS WITH CLOUDY (7-8)/8 7 7 9 8 1 0 0 0 0 0 0 8 40 DAYS WITH VISIBILITY =< 2 KM 6 5 0 0 0 0 0 0 0 0 0 6 17 DURATION OF SUNSHINE HOURS 192.9 180.5 212.0 235.5 312.3 370.4 360.9 348.7 314.2 302.9 262.9 154.9 3248.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.9 933.5 932.7 930.9 928.6 923.2 918.6 921.4 927.0 932.1 934.8 936.4 929.7 MAX. QFE PRESSURE IN HPA 940.8 938.8 938.4 936.2 933.4 929.2 922.5 926.4 932.3 938.8 940.0 941.3 941.3 DAY-HOUR 16- 6 1- 6 3- 6 11-18 3- 6 1- 6 25- 6 19- 6 13- 6 25- 6 30- 6 19- 6 MIN. QFE PRESSURE IN HPA 933.1 927.4 926.9 926.0 923.9 918.4 913.4 915.1 920.8 928.1 928.3 930.5 913.4 DAY-HOUR 9-12 23-12 14-15 22-15 15-12 18-15 20-12 3-12 4-15 15-12 6-12 25- 3 MEAN QNH PRESSURE IN HPA 1018.3 1014.6 1013.7 1011.8 1009.3 1003.5 998.6 1001.7 1007.6 1013.0 1016.0 1017.6 1010.5 MAX. QNH PRESSURE IN HPA 1022.4 1020.2 1019.8 1017.5 1014.5 1010.0 1002.8 1007.0 1013.3 1020.2 1021.5 1022.9 1022.9 DAY-HOUR 16- 6 1- 6 3- 6 11-18 3- 6 1- 6 25- 6 19- 6 13- 6 25- 6 30- 6 19- 6 MIN. QNH PRESSURE IN HPA 1014.1 1008.0 1007.5 1006.5 1004.3 998.4 993.1 994.9 1001.0 1008.8 1009.0 1011.4 993.1 DAY-HOUR 9-12 23-12 14-15 22-15 15-12 18-15 20-12 3-12 4-15 15-12 6-12 25- 3 MEAN QFF PRESSURE IN HPA 1018.1 1014.2 1012.6 1009.3 1004.5 997.5 991.9 994.8 1002.1 1009.3 1014.1 1017.6 1007.2 MAX. QFF PRESSURE IN HPA 1022.5 1019.6 1018.9 1015.3 1009.8 1004.8 996.4 1000.3 1007.7 1016.7 1021.4 1024.1 1024.1 DAY-HOUR 16- 6 1- 6 3- 6 12-12 3- 6 2-15 25- 6 19- 6 13- 6 24- 6 30- 6 19- 6 MIN. QFF PRESSURE IN HPA 1013.6 1007.3 1006.5 1002.9 999.9 992.3 986.1 987.8 994.2 1004.6 1006.4 1011.0 986.1 DAY-HOUR 11-12 23-12 14-15 22-15 22-18 18-15 20-12 3-12 1-12 13- 0 6-12 25- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 936.7 933.3 932.3 930.5 928.4 923.1 918.5 921.2 926.5 931.8 934.5 936.2 929.4 MAX. QFE PRESSURE IN HPA 939.6 937.3 937.0 934.6 931.4 928.1 921.8 925.4 930.2 936.8 938.1 939.9 939.9 DAY 19 1 3 4 3 3 25 12 13 25 30 20 MIN. QFE PRESSURE IN HPA 934.3 929.7 927.9 927.2 925.0 919.3 914.8 916.6 921.5 928.6 929.6 930.6 914.8 DAY 10 23 14 22 16 18 20 9 1 13 7 12 MEAN QNH PRESSURE IN HPA 1018.0 1014.4 1013.2 1011.4 1009.1 1003.4 998.5 1001.5 1007.1 1012.7 1015.6 1017.4 1010.2 MAX. QNH PRESSURE IN HPA 1021.1 1018.6 1018.3 1015.8 1012.3 1008.8 1002.1 1005.9 1011.0 1018.1 1019.5 1021.4 1021.4 DAY 19 1 3 4 3 3 25 12 13 25 30 20 MIN. QNH PRESSURE IN HPA 1015.4 1010.5 1008.6 1007.8 1005.5 999.4 994.6 996.5 1001.7 1009.3 1010.4 1011.5 994.6 DAY 10 23 14 22 16 18 20 9 1 13 7 12 MEAN QFF PRESSURE IN HPA 1017.6 1013.9 1012.0 1008.7 1004.3 997.3 991.8 994.5 1001.5 1008.8 1013.4 1017.2 1006.8 MAX. QFF PRESSURE IN HPA 1020.2 1017.7 1017.2 1013.9 1008.0 1003.7 995.4 999.1 1005.5 1014.8 1019.3 1022.1 1022.1 DAY 19 11 3 13 8 3 25 19 30 25 30 19 MIN. QFF PRESSURE IN HPA 1014.3 1009.4 1007.0 1004.1 1000.8 993.1 987.4 988.8 994.9 1004.6 1008.0 1011.0 987.4 DAY 11 23 14 23 23 20 21 9 1 13 7 25 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 936.7 933.5 932.6 931.1 928.9 923.6 919.0 921.7 927.1 932.3 935.0 936.2 929.8 MAX. QFE PRESSURE IN HPA 939.2 937.0 937.0 935.0 932.4 928.4 921.8 925.6 930.8 936.9 938.6 939.9 939.9 DAY 16 1 3 4 27 2 25 12 13 24 15 19 MIN. QFE PRESSURE IN HPA 933.8 928.5 927.9 927.2 925.6 919.9 915.0 917.6 921.7 928.8 930.2 930.5 915.0 DAY 13 23 14 24 16 18 20 9 1 13 6 25 MEAN QNH PRESSURE IN HPA 1018.1 1014.5 1013.6 1012.1 1009.6 1004.0 999.0 1001.9 1007.7 1013.3 1016.2 1017.4 1010.6 MAX. QNH PRESSURE IN HPA 1020.7 1018.3 1018.3 1016.2 1013.4 1009.1 1002.1 1006.1 1011.7 1018.2 1020.0 1021.4 1021.4 DAY 16 1 3 4 27 2 25 12 13 24 15 19 MIN. QNH PRESSURE IN HPA 1014.9 1009.2 1008.6 1007.8 1006.1 1000.0 994.8 997.6 1001.9 1009.5 1011.0 1011.4 994.8 DAY 13 23 14 24 16 18 20 9 1 13 6 25 MEAN QFF PRESSURE IN HPA 1018.3 1014.5 1013.0 1009.9 1005.3 998.5 992.8 995.7 1002.9 1010.2 1014.9 1017.9 1007.8 MAX. QFF PRESSURE IN HPA 1020.7 1018.5 1017.8 1014.9 1009.6 1004.0 995.9 1000.0 1006.7 1015.9 1020.2 1022.9 1022.9 DAY 23 11 3 13 8 1 25 12 13 24 30 19 MIN. QFF PRESSURE IN HPA 1014.6 1008.5 1007.5 1005.2 1000.6 994.2 988.0 990.9 995.8 1005.5 1009.4 1011.2 988.0 DAY 13 23 14 23 23 19 20 9 1 13 6 12 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 938.1 934.6 933.8 932.0 929.7 924.1 919.4 922.4 928.0 933.4 936.2 937.4 930.8 MAX. QFE PRESSURE IN HPA 940.8 938.8 938.4 935.7 933.4 929.2 922.5 926.4 932.3 938.8 940.0 941.3 941.3 DAY 16 1 3 11 3 1 25 19 13 25 30 19 MIN. QFE PRESSURE IN HPA 935.4 929.7 928.5 927.6 926.2 920.7 915.3 918.5 922.8 930.3 931.1 931.8 915.3 DAY 9 23 14 24 15 18 21 3 1 15 6 25 MEAN QNH PRESSURE IN HPA 1019.5 1015.7 1014.9 1013.0 1010.6 1004.5 999.5 1002.6 1008.7 1014.5 1017.4 1018.7 1011.6 MAX. QNH PRESSURE IN HPA 1022.4 1020.2 1019.8 1016.9 1014.5 1010.0 1002.8 1007.0 1013.3 1020.2 1021.5 1022.9 1022.9 DAY 16 1 3 11 3 1 25 19 13 25 30 19 MIN. QNH PRESSURE IN HPA 1016.6 1010.5 1009.2 1008.3 1006.8 1000.9 995.1 998.5 1003.1 1011.2 1012.0 1012.8 995.1 DAY 9 23 14 24 15 18 21 3 1 15 6 25 MEAN QFF PRESSURE IN HPA 1019.6 1015.4 1013.7 1010.4 1005.5 998.2 992.7 995.6 1003.1 1010.6 1015.6 1018.9 1008.3 MAX. QFF PRESSURE IN HPA 1022.5 1019.6 1018.9 1014.5 1009.8 1004.5 996.4 1000.3 1007.7 1016.7 1021.4 1024.1 1024.1 DAY 16 1 3 12 3 1 25 19 13 24 30 19 MIN. QFF PRESSURE IN HPA 1016.3 1009.8 1008.4 1006.0 1001.0 994.2 987.8 991.0 996.1 1006.7 1009.4 1012.2 987.8 DAY 11 23 14 24 23 18 21 4 1 1 6 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 937.4 934.0 933.3 931.6 929.2 923.7 918.9 921.9 927.4 932.5 935.0 936.7 930.1 MAX. QFE PRESSURE IN HPA 939.8 938.4 937.8 936.1 933.0 929.1 921.8 926.0 931.6 937.4 939.4 940.2 940.2 DAY 18 1 3 12 27 1 4 19 13 25 30 19 MIN. QFE PRESSURE IN HPA 934.1 929.0 927.9 927.2 925.6 920.4 914.3 917.2 921.9 929.4 929.7 932.1 914.3 DAY 9 23 14 24 15 18 20 3 1 15 6 12 MEAN QNH PRESSURE IN HPA 1018.8 1015.2 1014.4 1012.5 1010.0 1004.1 998.9 1002.2 1008.1 1013.5 1016.2 1018.0 1011.0 MAX. QNH PRESSURE IN HPA 1021.3 1019.8 1019.2 1017.4 1014.0 1009.9 1002.1 1006.5 1012.5 1018.7 1020.9 1021.7 1021.7 DAY 18 1 3 12 27 1 4 19 13 25 30 19 MIN. QNH PRESSURE IN HPA 1015.2 1009.8 1008.6 1007.8 1006.1 1000.6 994.0 997.1 1002.2 1010.2 1010.5 1013.1 994.0 DAY 9 23 14 24 15 18 20 3 1 15 6 12 MEAN QFF PRESSURE IN HPA 1018.3 1014.5 1012.9 1009.8 1005.0 997.7 991.9 995.0 1002.3 1009.3 1013.9 1017.7 1007.4 MAX. QFF PRESSURE IN HPA 1020.8 1018.8 1017.9 1014.9 1009.3 1004.6 995.2 999.7 1006.5 1015.2 1021.0 1022.2 1022.2 DAY 16 10 3 12 3 1 4 19 13 24 30 19 MIN. QFF PRESSURE IN HPA 1014.3 1009.0 1007.5 1004.8 1000.8 993.8 986.3 989.5 995.0 1005.9 1007.6 1012.0 986.3 DAY 9 23 14 22 23 20 21 3 1 13 6 12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 936.1 932.8 932.0 930.3 927.9 922.7 917.9 920.6 926.2 931.1 933.7 935.4 928.9 MAX. QFE PRESSURE IN HPA 938.6 936.9 935.9 936.0 931.5 929.0 921.0 924.5 930.8 935.7 938.2 939.1 939.1 DAY 18 1 3 12 27 2 4 19 13 24 30 19 MIN. QFE PRESSURE IN HPA 933.1 927.4 927.2 926.0 923.9 919.1 913.4 915.1 920.9 928.1 928.3 930.9 913.4 DAY 9 23 14 24 15 18 20 3 1 15 6 25 MEAN QNH PRESSURE IN HPA 1017.3 1013.8 1013.0 1011.2 1008.6 1003.0 997.9 1000.8 1006.8 1012.0 1014.8 1016.6 1009.6 MAX. QNH PRESSURE IN HPA 1020.0 1018.2 1017.1 1017.2 1012.4 1009.8 1001.2 1004.9 1011.7 1016.9 1019.6 1020.6 1020.6 DAY 18 1 3 12 27 2 4 19 13 24 30 19 MIN. QNH PRESSURE IN HPA 1014.1 1008.0 1007.8 1006.5 1004.3 999.2 993.1 994.9 1001.1 1008.8 1009.0 1011.8 993.1 DAY 9 23 14 24 15 18 20 3 1 15 6 25 MEAN QFF PRESSURE IN HPA 1016.9 1013.3 1011.7 1008.5 1003.9 996.9 991.1 994.0 1001.3 1008.1 1012.7 1016.4 1006.2 MAX. QFF PRESSURE IN HPA 1019.3 1017.6 1015.9 1015.3 1007.9 1004.6 994.4 998.4 1006.0 1013.7 1019.7 1021.2 1021.2 DAY 18 10 3 12 12 2 4 19 13 24 30 19 MIN. QFF PRESSURE IN HPA 1013.6 1007.3 1006.6 1003.9 1000.0 992.6 986.1 987.8 994.2 1004.9 1006.4 1011.4 986.1 DAY 11 23 14 24 15 18 20 3 1 1 6 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.5 933.0 932.1 930.1 927.7 922.3 917.7 920.5 926.2 931.3 934.3 935.9 929.0 MAX. QFE PRESSURE IN HPA 938.8 936.9 935.9 935.6 930.5 929.0 920.8 924.2 931.0 936.5 938.4 940.0 940.0 DAY 15 1 3 12 3 2 4 19 13 24 30 19 MIN. QFE PRESSURE IN HPA 933.8 928.0 926.9 926.0 923.9 918.4 913.6 915.5 920.8 928.5 929.3 931.2 913.6 DAY 9 23 14 22 15 18 21 3 4 12 6 11 MEAN QNH PRESSURE IN HPA 1017.8 1014.1 1013.1 1010.9 1008.3 1002.6 997.6 1000.7 1006.7 1012.2 1015.4 1017.2 1009.7 MAX. QNH PRESSURE IN HPA 1020.2 1018.2 1017.1 1016.8 1011.4 1009.8 1001.0 1004.6 1011.9 1017.8 1019.8 1021.5 1021.5 DAY 15 1 3 12 3 2 4 19 13 24 30 19 MIN. QNH PRESSURE IN HPA 1014.9 1008.7 1007.5 1006.5 1004.3 998.4 993.3 995.3 1001.0 1009.2 1010.1 1012.1 993.3 DAY 9 23 14 22 15 18 21 3 4 12 6 11 MEAN QFF PRESSURE IN HPA 1017.9 1013.9 1012.3 1008.8 1004.0 997.1 991.4 994.4 1001.9 1009.2 1014.1 1017.5 1006.9 MAX. QFF PRESSURE IN HPA 1020.4 1018.0 1016.7 1015.3 1007.7 1004.8 994.7 998.8 1006.9 1015.3 1020.2 1022.8 1022.8 DAY 15 10 2 12 12 2 4 19 13 24 30 19 MIN. QFF PRESSURE IN HPA 1014.5 1008.1 1006.5 1002.9 1000.0 992.3 986.5 988.7 995.1 1005.2 1008.6 1011.6 986.5 DAY 11 23 14 22 22 18 20 3 1 12 6 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 937.2 933.7 932.9 930.9 928.5 923.2 918.9 921.6 927.2 932.3 935.1 936.8 929.8 MAX. QFE PRESSURE IN HPA 939.8 936.9 937.2 936.2 931.4 928.4 921.6 925.4 931.3 937.7 939.0 940.8 940.8 DAY 18 1 2 11 2 2 28 11 13 24 30 19 MIN. QFE PRESSURE IN HPA 934.7 929.7 927.8 927.4 925.0 919.8 915.2 916.9 921.3 929.3 930.3 931.7 915.2 DAY 9 23 14 23 15 18 20 8 1 12 6 11 MEAN QNH PRESSURE IN HPA 1018.5 1014.8 1013.9 1011.8 1009.3 1003.5 998.9 1001.8 1007.8 1013.3 1016.3 1018.1 1010.7 MAX. QNH PRESSURE IN HPA 1021.3 1018.2 1018.5 1017.5 1012.3 1009.1 1001.8 1005.9 1012.2 1019.1 1020.5 1022.4 1022.4 DAY 18 1 2 11 2 2 28 11 13 24 30 19 MIN. QNH PRESSURE IN HPA 1015.9 1010.5 1008.5 1008.0 1005.5 999.9 995.0 996.8 1001.5 1010.1 1011.2 1012.6 995.0 DAY 9 23 14 23 15 18 20 8 1 12 6 11 MEAN QFF PRESSURE IN HPA 1018.5 1014.5 1012.8 1009.2 1004.2 997.2 992.1 994.8 1002.2 1009.4 1014.4 1018.2 1007.3 MAX. QFF PRESSURE IN HPA 1021.1 1018.6 1017.8 1015.2 1007.7 1003.4 994.9 999.0 1006.4 1015.8 1019.9 1023.2 1023.2 DAY 15 10 2 11 2 2 7 19 13 24 30 19 MIN. QFF PRESSURE IN HPA 1015.1 1010.1 1007.4 1005.1 999.9 992.9 988.1 989.5 994.6 1005.6 1008.7 1011.8 988.1 DAY 11 23 14 22 22 18 20 8 1 12 6 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 937.0 933.5 932.9 930.9 928.6 923.1 918.8 921.7 927.1 932.2 935.0 936.6 929.8 MAX. QFE PRESSURE IN HPA 939.1 936.6 937.4 935.4 931.6 928.5 921.3 925.4 930.7 937.0 938.6 940.5 940.5 DAY 18 1 2 12 7 2 4 11 12 24 14 19 MIN. QFE PRESSURE IN HPA 934.7 930.4 928.4 927.1 925.0 919.7 915.4 916.9 921.6 928.9 930.3 931.4 915.4 DAY 9 23 14 23 15 17 20 3 3 12 6 11 MEAN QNH PRESSURE IN HPA 1018.3 1014.6 1014.0 1011.8 1009.3 1003.5 998.8 1002.0 1007.7 1013.1 1016.2 1017.9 1010.6 MAX. QNH PRESSURE IN HPA 1020.6 1017.9 1018.7 1016.6 1012.5 1009.2 1001.5 1005.9 1011.6 1018.3 1020.0 1022.1 1022.1 DAY 18 1 2 12 7 2 4 11 12 24 14 19 MIN. QNH PRESSURE IN HPA 1015.9 1011.3 1009.1 1007.7 1005.5 999.8 995.2 996.8 1001.8 1009.7 1011.2 1012.3 995.2 DAY 9 23 14 23 15 17 20 3 3 12 6 11 MEAN QFF PRESSURE IN HPA 1017.9 1014.0 1012.5 1008.9 1004.2 997.0 991.7 994.7 1001.8 1009.0 1013.9 1017.5 1006.9 MAX. QFF PRESSURE IN HPA 1019.8 1018.3 1017.5 1014.9 1007.8 1003.4 994.8 998.8 1005.5 1014.6 1019.8 1022.1 1022.1 DAY 26 10 2 12 7 2 7 18 12 24 30 19 MIN. QFF PRESSURE IN HPA 1014.6 1009.9 1008.2 1004.7 1000.4 992.8 987.7 989.0 994.8 1004.7 1008.4 1011.7 987.7 DAY 11 22 14 22 22 18 20 8 3 12 6 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.9 12.8 14.1 20.2 28.6 32.2 35.4 34.2 30.2 23.6 16.9 13.2 22.6 MINIMUN AIR TEMPERATURE (C) 5.6 8.1 9.0 12.6 19.9 21.7 26.5 25.7 21.0 15.3 10.2 7.1 15.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 10 23 31 31 18 0 0 0 113 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 2.2 5.0 7.6 13.6 17.6 22.0 21.8 16.2 11.4 6.6 4.0 1.0 DAY 15 6 5 4 1 7 2 28 21 25 11 17 MAXIMUM AIR TEMPERATURE (C) 15.2 18.5 19.6 27.4 36.0 40.7 42.9 42.3 39.1 31.8 24.6 20.8 29.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 31 30 31 31 30 26 0 0 186 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 25.6 24.0 33.0 41.6 43.0 44.8 45.6 42.4 39.6 29.8 24.0 45.6 DAY 30 9 30 23 31 3 31 1 12 2 4 21 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 10.4 10.6 14.8 16.1 19.0 16.4 16.6 18.1 16.5 14.4 13.7 14.7 MEAN DAILY TEMP. (MDT) (C) 10.4 13.3 14.3 20.0 28.0 31.2 34.7 34.0 30.0 23.5 17.4 13.9 22.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 20.2 215.6 305.7 424.5 403.4 270.7 81.6 0.0 0.0 1721.8 HEATING DEG. DAYS(BASE 18 0C) 235.2 135.6 114.6 8.9 0.0 0.0 0.0 0.0 0.0 0.0 34.4 126.0 654.6 DEWPOINT (MEAN C) 5.3 6.9 7.8 8.0 6.3 5.3 5.0 8.2 4.8 3.1 4.3 4.5 5.8 MIXING RATIO (G/KG) 6.13 6.85 7.44 7.58 6.66 6.33 6.19 8.08 6.53 5.42 5.89 5.83 6.58 VAPOUR PRESSURE (HPA) 9.12 10.16 10.98 11.20 9.83 9.28 9.06 11.80 9.59 8.05 8.77 8.69 9.71 SATURATION DEF. (HPA) 3.39 5.13 5.62 13.73 31.30 41.49 50.69 44.16 35.65 22.88 11.47 7.12 22.72 RELATIVE HUMIDITY (MEAN %) 76 71 69 51 28 21 17 24 25 30 49 61 44 RELATIVE HUMIDITY (MAX. %) 93 92 90 81 48 36 30 42 48 46 69 86 63 RELATIVE HUMIDITY (MIN. %) 51 45 46 28 14 11 8 10 10 16 29 31 25 RELATIVE HUMIDITY (MEAN% 03UTC) 90 88 86 77 46 34 25 37 43 45 65 83 60 RELATIVE HUMIDITY (MEAN% 09UTC) 58 52 50 34 15 13 9 13 11 17 33 36 28 RELATIVE HUMIDITY (MEAN% 15UTC) 72 63 60 38 19 14 12 19 18 25 43 51 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 199.1 101.2 103.8 55.5 4.0 0.0 0.0 0.0 13.0 0.8 33.5 11.6 522.5 DAYS WITH PRECIPITATION >=10 6 4 4 2 0 0 0 0 1 0 2 0 19 DAYS WITH PRECIPITATION >= 5 7 6 7 5 0 0 0 0 1 0 2 1 29 DAYS WITH PRECIPITATION >= 1 9 11 12 5 1 0 0 0 2 0 2 2 44 DAYS WITH PRECIPITATION 12 12 13 8 1 0 1 1 2 2 4 6 62 GREATEST DAILY PRECIPITATION 59.8 24.0 24.0 21.0 4.0 0.0 0.0 0.0 12.0 0.5 19.0 6.0 59.8 DAY 6 5 22 13 12 ** ** ** 1 16 22 15 DAY WITH THUNDER STORM 2 3 6 1 3 0 1 2 1 1 0 2 22 DAYS WITH SNOW OR SLEET 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 0 0 0 0 0 0 0 6 0 0 0 6 WIND DIRECTION (PREVAILING) 135 135 270 135 270 270 270 270 270 270 270 135 270 PREVAILING WIND SPEED(KNOTS) 10.5 8.8 9.3 8.5 9.6 11.3 11.2 12.0 10.4 10.1 9.4 8.7 10.3 PREVAILING WIND PERCENT 20.2 24.1 14.1 12.1 18.1 21.7 14.9 22.2 21.7 16.5 17.9 7.7 14.8 CALMS PERCENT OF WIND 68.1 58.6 59.3 57.9 51.6 55.8 56.5 59.7 61.3 65.7 67.9 78.6 61.8 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 140 150 205 237 288 279 214 264 279 258 254 200 248 VECTOR WIND MAGNITUDE(KNOTS) 2.6 1.9 0.8 1.0 2.4 3.7 0.9 2.4 3.0 1.5 1.6 0.7 1.2 WIND STEADINESES (MEAN %) 81.2 52.8 20.0 25.6 49.0 77.1 18.4 51.1 76.9 48.4 55.2 41.2 31.6 WIND SPEED (MEAN KNOTS) 3.2 3.6 4.0 3.9 4.9 4.8 4.9 4.7 3.9 3.1 2.9 1.7 3.8 FASTEST WIND DIRECTION 120 120 120 180 330 110 120 340 60 300 280 150 120 FASTEST WIND SPEED (KNOTS) 29 17 19 23 19 23 39 35 27 17 17 17 39 DAY 11 4 12 21 29 17 27 20 2 4 4 23 DAYS WITH SKY CLEAR (0-2)/8 11 10 12 14 19 29 27 27 30 28 19 21 247 DAYS WITH P.CLOUDY (3-6)/8 14 9 10 13 11 1 4 4 0 3 7 10 86 DAYS WITH CLOUDY (7-8)/8 6 10 9 3 1 0 0 0 0 0 4 0 33 DAYS WITH VISIBILITY =< 2 KM 3 0 0 0 0 0 0 1 0 0 2 0 6 DURATION OF SUNSHINE HOURS 169.8 164.7 202.4 278.4 318.1 370.4 347.9 338.9 302.5 299.7 226.0 246.7 3265.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.6 932.6 930.5 930.9 927.8 922.8 921.0 922.5 926.0 932.4 935.5 937.2 929.5 MAX. QFE PRESSURE IN HPA 940.2 937.8 936.4 936.6 932.5 928.0 927.8 929.9 933.8 936.6 942.1 941.6 942.1 DAY-HOUR 28- 6 8- 6 29- 6 13- 9 17- 6 7- 6 3- 6 27-15 25- 6 17- 9 16- 6 8- 6 MIN. QFE PRESSURE IN HPA 921.4 926.0 926.1 927.1 923.0 918.4 916.8 917.3 921.3 925.5 931.0 934.3 916.8 DAY-HOUR 12- 3 4-18 7- 3 12-15 28-15 18-15 25-15 14-15 15-12 4-12 2-12 16-12 MEAN QNH PRESSURE IN HPA 1015.8 1013.6 1011.4 1011.7 1008.5 1003.1 1001.2 1002.8 1006.5 1013.4 1016.7 1018.5 1010.3 MAX. QNH PRESSURE IN HPA 1021.7 1019.2 1017.7 1017.9 1013.5 1008.7 1008.5 1010.7 1014.9 1017.9 1023.8 1023.2 1023.8 DAY-HOUR 28- 6 8- 6 29- 6 13- 9 17- 6 7- 6 3- 6 27-15 25- 6 17- 9 16- 6 8- 6 MIN. QNH PRESSURE IN HPA 1001.6 1006.5 1006.7 1007.7 1003.3 998.4 996.7 997.2 1001.5 1006.0 1011.9 1015.4 996.7 DAY-HOUR 12- 3 4-18 7- 3 12-15 28-15 18-15 25-15 14-15 15-12 4-12 2-12 16-12 MEAN QFF PRESSURE IN HPA 1015.9 1012.6 1010.1 1008.8 1003.3 996.9 994.2 996.1 1000.9 1009.5 1014.7 1017.7 1006.7 MAX. QFF PRESSURE IN HPA 1022.3 1018.2 1017.0 1015.1 1008.2 1003.1 1001.6 1006.0 1010.2 1015.2 1021.9 1022.7 1022.7 DAY-HOUR 27- 6 7- 6 29- 3 13- 9 17- 6 7- 6 3- 6 27-15 25- 6 17- 9 15-18 28- 6 MIN. QFF PRESSURE IN HPA 1001.4 1005.7 1004.3 1004.6 997.4 992.1 989.3 990.6 995.5 1000.7 1009.2 1014.1 989.3 DAY-HOUR 12- 3 4-21 7-12 12-12 28-21 18-18 25-15 3-15 15-12 4-12 2-12 15- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 934.3 932.3 930.2 930.5 927.5 922.6 920.8 922.2 925.6 932.1 935.2 936.9 929.2 MAX. QFE PRESSURE IN HPA 938.6 936.2 935.5 933.8 930.2 926.3 926.0 925.4 931.5 935.5 941.6 939.6 941.6 DAY 26 8 29 8 17 1 3 27 26 21 16 28 MIN. QFE PRESSURE IN HPA 921.8 926.2 926.9 927.8 923.4 919.1 917.9 918.6 922.2 926.7 932.1 934.6 917.9 DAY 12 5 13 18 29 17 25 4 15 5 2 15 MEAN QNH PRESSURE IN HPA 1015.4 1013.2 1011.0 1011.4 1008.2 1002.9 1001.0 1002.4 1006.2 1013.1 1016.4 1018.2 1009.9 MAX. QNH PRESSURE IN HPA 1020.0 1017.5 1016.7 1014.9 1011.0 1006.9 1006.5 1005.9 1012.4 1016.7 1023.2 1021.1 1023.2 DAY 26 8 29 8 17 1 3 27 26 21 16 28 MIN. QNH PRESSURE IN HPA 1002.1 1006.8 1007.5 1008.5 1003.8 999.2 997.9 998.6 1002.5 1007.3 1013.1 1015.8 997.9 DAY 12 5 13 18 29 17 25 4 15 5 2 15 MEAN QFF PRESSURE IN HPA 1015.2 1012.2 1009.7 1008.3 1003.0 996.7 994.0 995.6 1000.3 1009.0 1014.2 1017.1 1006.3 MAX. QFF PRESSURE IN HPA 1020.5 1016.6 1016.2 1011.9 1006.8 1000.7 999.8 999.4 1007.3 1013.4 1021.0 1020.0 1021.0 DAY 26 8 29 8 12 2 3 28 26 24 16 28 MIN. QFF PRESSURE IN HPA 1001.9 1006.3 1005.7 1005.5 997.7 992.6 990.4 991.7 996.4 1002.1 1010.7 1014.1 990.4 DAY 12 5 7 18 29 19 25 4 15 5 2 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 934.4 932.6 930.4 931.0 928.1 923.3 921.4 922.8 926.3 932.6 935.5 937.3 929.6 MAX. QFE PRESSURE IN HPA 938.7 936.7 935.7 935.1 931.5 927.0 927.0 926.1 932.6 935.9 941.6 940.1 941.6 DAY 2 8 29 8 17 3 3 27 25 24 16 28 MIN. QFE PRESSURE IN HPA 921.4 927.2 926.1 927.9 924.1 919.7 918.4 919.4 922.7 927.2 932.6 935.0 918.4 DAY 12 5 7 18 29 17 6 4 15 5 2 15 MEAN QNH PRESSURE IN HPA 1015.6 1013.7 1011.2 1011.9 1008.8 1003.7 1001.7 1003.2 1006.8 1013.6 1016.8 1018.6 1010.5 MAX. QNH PRESSURE IN HPA 1020.1 1018.0 1016.9 1016.3 1012.4 1007.6 1007.6 1006.7 1013.6 1017.1 1023.2 1021.6 1023.2 DAY 2 8 29 8 17 3 3 27 25 24 16 28 MIN. QNH PRESSURE IN HPA 1001.6 1007.8 1006.7 1008.6 1004.5 999.8 998.4 999.5 1003.0 1007.8 1013.6 1016.2 998.4 DAY 12 5 7 18 29 17 6 4 15 5 2 15 MEAN QFF PRESSURE IN HPA 1016.0 1013.1 1010.3 1009.4 1004.0 998.0 995.1 997.0 1001.8 1010.4 1015.3 1018.3 1007.4 MAX. QFF PRESSURE IN HPA 1020.9 1017.7 1017.0 1014.0 1007.9 1002.2 1001.3 1002.0 1009.5 1014.7 1021.7 1021.4 1021.7 DAY 26 8 29 8 17 7 3 28 25 24 16 28 MIN. QFF PRESSURE IN HPA 1001.4 1007.7 1004.8 1006.3 998.6 993.7 991.2 993.0 997.8 1003.2 1012.4 1015.0 991.2 DAY 12 16 7 18 29 17 25 4 15 4 2 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.7 933.8 931.7 932.1 928.9 923.8 922.1 923.6 927.1 933.6 936.7 938.6 930.6 MAX. QFE PRESSURE IN HPA 940.2 937.8 936.4 935.9 932.5 928.0 927.8 927.6 933.8 936.6 942.1 941.6 942.1 DAY 28 8 29 8 17 7 3 27 25 21 16 8 MIN. QFE PRESSURE IN HPA 922.3 929.0 927.2 928.4 924.5 920.1 918.9 919.1 923.4 928.0 933.6 936.0 918.9 DAY 12 5 7 18 29 20 6 14 15 4 2 15 MEAN QNH PRESSURE IN HPA 1016.9 1014.8 1012.6 1013.1 1009.7 1004.2 1002.3 1004.0 1007.7 1014.6 1018.0 1020.1 1011.5 MAX. QNH PRESSURE IN HPA 1021.7 1019.2 1017.7 1017.1 1013.5 1008.7 1008.5 1008.3 1014.9 1017.9 1023.8 1023.2 1023.8 DAY 28 8 29 8 17 7 3 27 25 21 16 8 MIN. QNH PRESSURE IN HPA 1002.6 1009.8 1007.8 1009.1 1004.9 1000.2 999.0 999.2 1003.8 1008.7 1014.7 1017.2 999.0 DAY 12 5 7 18 29 20 6 14 15 4 2 15 MEAN QFF PRESSURE IN HPA 1017.2 1013.9 1011.5 1010.1 1004.3 997.9 995.2 997.0 1001.9 1010.7 1016.1 1019.4 1007.9 MAX. QFF PRESSURE IN HPA 1022.3 1018.2 1016.9 1014.3 1008.2 1003.1 1001.6 1002.2 1010.2 1014.7 1021.8 1022.7 1022.7 DAY 27 7 28 8 17 7 3 28 25 21 16 28 MIN. QFF PRESSURE IN HPA 1002.7 1009.1 1006.3 1005.8 998.4 993.7 991.6 991.8 997.8 1003.1 1012.2 1015.9 991.6 DAY 12 16 7 18 29 19 25 14 15 4 6 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 935.2 933.2 931.2 931.6 928.5 923.4 921.5 922.9 926.3 932.7 935.7 937.5 930.0 MAX. QFE PRESSURE IN HPA 939.8 937.2 936.3 936.6 932.1 927.5 927.4 926.6 932.9 936.6 941.0 941.1 941.1 DAY 25 19 28 13 17 1 3 27 25 17 15 8 MIN. QFE PRESSURE IN HPA 922.3 928.6 927.3 928.4 924.8 919.6 918.4 918.8 922.4 927.0 932.4 935.3 918.4 DAY 12 16 7 18 29 20 6 14 15 4 2 15 MEAN QNH PRESSURE IN HPA 1016.4 1014.3 1012.1 1012.5 1009.2 1003.7 1001.7 1003.2 1006.8 1013.8 1016.9 1018.9 1010.8 MAX. QNH PRESSURE IN HPA 1021.3 1018.5 1017.6 1017.9 1013.1 1008.2 1008.0 1007.2 1013.9 1017.9 1022.6 1022.7 1022.7 DAY 25 19 28 13 17 1 3 27 25 17 15 8 MIN. QNH PRESSURE IN HPA 1002.6 1009.3 1007.9 1009.1 1005.3 999.7 998.4 998.8 1002.7 1007.6 1013.4 1016.5 998.4 DAY 12 16 7 18 29 20 6 14 15 4 2 15 MEAN QFF PRESSURE IN HPA 1016.3 1013.1 1010.6 1009.3 1003.7 997.2 994.5 996.1 1000.9 1009.4 1014.6 1017.7 1007.0 MAX. QFF PRESSURE IN HPA 1021.7 1017.0 1016.7 1015.1 1007.6 1002.0 1001.1 1000.9 1008.8 1015.2 1020.3 1021.3 1021.7 DAY 25 19 28 13 17 7 3 28 25 17 15 8 MIN. QFF PRESSURE IN HPA 1002.6 1008.1 1006.0 1005.9 999.0 993.0 990.9 991.7 996.4 1001.8 1010.6 1015.2 990.9 DAY 12 16 7 18 29 20 25 14 15 4 2 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 933.8 931.8 929.9 930.3 927.2 922.3 920.1 921.6 925.0 931.3 934.5 936.2 928.7 MAX. QFE PRESSURE IN HPA 938.1 935.7 935.7 934.5 930.4 926.7 926.1 925.2 931.1 935.1 940.0 939.3 940.0 DAY 25 19 28 8 11 7 3 28 25 17 15 8 MIN. QFE PRESSURE IN HPA 922.2 927.4 926.2 927.4 923.9 918.8 917.5 917.7 921.3 925.5 931.0 934.3 917.5 DAY 12 16 7 12 28 18 25 14 15 4 2 16 MEAN QNH PRESSURE IN HPA 1014.9 1012.7 1010.7 1011.2 1007.8 1002.5 1000.2 1001.8 1005.5 1012.2 1015.6 1017.4 1009.4 MAX. QNH PRESSURE IN HPA 1019.5 1016.9 1016.9 1015.6 1011.3 1007.3 1006.7 1005.7 1012.0 1016.3 1021.5 1020.8 1021.5 DAY 25 19 28 8 11 7 3 28 25 17 15 8 MIN. QNH PRESSURE IN HPA 1002.5 1008.0 1006.8 1008.0 1004.3 998.8 997.5 997.7 1001.5 1006.0 1011.9 1015.4 997.5 DAY 12 16 7 12 28 18 25 14 15 4 2 16 MEAN QFF PRESSURE IN HPA 1014.7 1011.7 1009.3 1008.0 1002.7 996.4 993.3 995.1 999.8 1008.2 1013.4 1016.4 1005.8 MAX. QFF PRESSURE IN HPA 1019.8 1015.7 1016.5 1013.1 1006.9 1001.6 999.8 999.9 1007.0 1013.8 1019.4 1019.6 1019.8 DAY 25 6 28 14 11 7 3 28 25 17 15 8 MIN. QFF PRESSURE IN HPA 1002.6 1007.1 1004.3 1004.6 998.6 992.5 990.0 990.7 995.5 1000.7 1009.2 1014.3 990.0 DAY 12 16 7 12 29 20 25 14 15 4 2 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.2 931.9 929.9 929.9 926.8 921.9 919.8 921.7 925.2 931.8 935.0 936.6 928.7 MAX. QFE PRESSURE IN HPA 938.5 935.9 935.4 934.5 929.9 926.0 925.2 929.9 931.6 935.0 941.0 939.4 941.0 DAY 25 19 28 7 11 1 3 27 25 17 15 27 MIN. QFE PRESSURE IN HPA 925.4 927.7 926.2 927.1 923.0 918.4 916.8 917.3 922.2 926.0 931.7 934.9 916.8 DAY 12 15 12 12 28 18 25 14 15 4 6 14 MEAN QNH PRESSURE IN HPA 1015.3 1012.9 1010.8 1010.8 1007.4 1002.1 1000.0 1001.9 1005.7 1012.7 1016.2 1017.9 1009.5 MAX. QNH PRESSURE IN HPA 1019.9 1017.1 1016.6 1015.6 1010.7 1006.5 1005.7 1010.7 1012.5 1016.2 1022.6 1020.9 1022.6 DAY 25 19 28 7 11 1 3 27 25 17 15 27 MIN. QNH PRESSURE IN HPA 1005.9 1008.4 1006.8 1007.7 1003.3 998.4 996.7 997.2 1002.5 1006.5 1012.6 1016.1 996.7 DAY 12 15 12 12 28 18 25 14 15 4 6 14 MEAN QFF PRESSURE IN HPA 1015.6 1012.3 1009.8 1008.3 1002.6 996.5 993.4 995.7 1000.7 1009.5 1014.8 1017.6 1006.4 MAX. QFF PRESSURE IN HPA 1021.0 1016.5 1016.4 1013.8 1006.6 1001.5 999.1 1006.0 1008.1 1014.0 1021.0 1020.4 1021.0 DAY 25 7 28 7 11 7 3 27 25 17 15 27 MIN. QFF PRESSURE IN HPA 1006.1 1007.5 1005.2 1004.7 997.7 992.2 989.3 990.6 997.2 1002.0 1010.8 1015.6 989.3 DAY 12 15 7 12 28 18 25 3 15 4 6 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 934.9 932.6 930.5 930.7 927.9 922.7 921.1 922.9 926.2 932.7 935.7 937.3 929.6 MAX. QFE PRESSURE IN HPA 939.5 936.3 936.3 935.1 930.7 926.8 926.6 927.4 932.4 935.9 942.0 940.1 942.0 DAY 26 19 28 7 17 1 3 27 25 23 15 27 MIN. QFE PRESSURE IN HPA 924.9 926.0 927.1 928.3 923.5 919.2 918.3 918.9 923.5 927.0 932.6 934.6 918.3 DAY 11 4 12 4 28 18 24 3 15 4 1 14 MEAN QNH PRESSURE IN HPA 1016.0 1013.6 1011.4 1011.6 1008.6 1003.1 1001.3 1003.2 1006.8 1013.7 1017.0 1018.7 1010.4 MAX. QNH PRESSURE IN HPA 1021.0 1017.6 1017.6 1016.3 1011.6 1007.4 1007.2 1008.0 1013.4 1017.1 1023.7 1021.6 1023.7 DAY 26 19 28 7 17 1 3 27 25 23 15 27 MIN. QNH PRESSURE IN HPA 1005.4 1006.5 1007.7 1009.0 1003.9 999.3 998.3 999.0 1003.9 1007.6 1013.6 1015.8 998.3 DAY 11 4 12 4 28 18 24 3 15 4 1 14 MEAN QFF PRESSURE IN HPA 1016.2 1012.7 1010.2 1008.6 1003.1 996.7 994.1 996.3 1001.0 1009.7 1015.0 1018.0 1006.8 MAX. QFF PRESSURE IN HPA 1021.8 1016.8 1016.8 1013.7 1006.1 1001.1 1000.0 1002.2 1008.1 1014.8 1021.9 1021.1 1021.9 DAY 26 6 28 7 4 7 3 27 25 17 15 27 MIN. QFF PRESSURE IN HPA 1005.4 1005.7 1006.4 1005.6 997.5 992.1 990.6 991.9 997.7 1002.4 1011.2 1014.3 990.6 DAY 11 4 19 30 28 18 24 3 15 4 6 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 934.6 932.7 930.6 930.8 927.8 922.7 921.1 922.8 926.1 932.5 935.6 937.3 929.6 MAX. QFE PRESSURE IN HPA 939.1 936.2 936.3 934.7 931.3 927.0 926.0 926.1 932.2 935.9 941.6 940.1 941.6 DAY 25 7 28 7 11 1 2 28 25 23 15 27 MIN. QFE PRESSURE IN HPA 923.4 926.2 927.1 927.9 923.5 919.4 917.9 918.9 923.4 926.6 932.6 935.2 917.9 DAY 11 4 12 2 28 19 24 3 14 4 1 15 MEAN QNH PRESSURE IN HPA 1015.8 1013.7 1011.5 1011.7 1008.5 1003.0 1001.4 1003.2 1006.7 1013.5 1016.8 1018.6 1010.4 MAX. QNH PRESSURE IN HPA 1020.6 1017.5 1017.6 1015.9 1012.2 1007.6 1006.5 1006.7 1013.2 1017.1 1023.2 1021.6 1023.2 DAY 25 7 28 7 11 1 2 28 25 23 15 27 MIN. QNH PRESSURE IN HPA 1003.8 1006.8 1007.7 1008.6 1003.9 999.5 997.9 999.0 1003.8 1007.2 1013.6 1016.4 997.9 DAY 11 4 12 2 28 19 24 3 14 4 1 15 MEAN QFF PRESSURE IN HPA 1015.7 1012.4 1010.0 1008.4 1002.9 996.4 994.0 996.0 1000.6 1009.2 1014.5 1017.4 1006.5 MAX. QFF PRESSURE IN HPA 1021.1 1016.2 1016.7 1013.0 1008.0 1001.1 999.4 1000.3 1007.6 1013.4 1020.8 1020.4 1021.1 DAY 25 6 28 14 11 1 2 27 25 23 15 27 MIN. QFF PRESSURE IN HPA 1003.6 1005.7 1005.9 1005.0 997.4 992.5 990.2 991.8 997.4 1001.8 1010.6 1014.6 990.2 DAY 11 4 19 2 28 18 24 3 14 4 6 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.5 10.9 13.0 18.6 26.5 32.6 34.2 33.6 30.0 24.8 15.6 11.3 21.8 MINIMUN AIR TEMPERATURE (C) 5.1 4.3 7.5 12.3 17.7 23.0 25.2 24.6 20.1 17.7 11.0 7.2 14.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 7 25 31 31 10 3 0 0 107 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) 1.4 -1.8 0.8 4.2 10.6 17.8 22.4 21.0 16.2 11.0 7.4 2.6 -1.8 DAY 5 7 1 13 6 3 3 31 11 26 29 28 MAXIMUM AIR TEMPERATURE (C) 16.8 18.1 18.6 25.0 34.0 40.0 41.7 41.3 38.5 31.7 21.2 16.6 28.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 29 30 31 31 30 22 0 0 174 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.4 26.2 23.6 31.6 40.4 44.6 46.5 45.6 41.0 37.4 26.2 20.8 46.5 DAY 11 21 3 28 30 15 30 1 6 6 8 8 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 13.8 11.1 12.7 16.3 17.0 16.5 16.7 18.4 14.0 10.2 9.4 14.0 MEAN DAILY TEMP. (MDT) (C) 11.0 11.2 13.1 18.6 25.8 31.5 33.5 33.0 29.3 24.7 16.1 11.9 21.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 10.3 156.2 315.9 386.0 370.7 248.8 125.1 0.0 0.0 1613.1 HEATING DEG. DAYS(BASE 18 0C) 218.1 191.4 153.0 29.7 0.3 0.0 0.0 0.0 0.0 0.0 64.6 189.7 846.7 DEWPOINT (MEAN C) 2.9 -3.1 4.0 8.5 3.9 3.0 4.9 4.8 -0.1 7.2 9.3 7.6 4.4 MIXING RATIO (G/KG) 5.21 3.50 5.79 7.85 5.72 5.41 6.12 6.03 4.28 7.30 8.05 7.09 6.03 VAPOUR PRESSURE (HPA) 7.76 5.22 8.58 11.59 8.45 7.95 8.96 8.84 6.33 10.81 11.94 10.54 8.92 SATURATION DEF. (HPA) 5.39 8.74 6.86 10.85 28.58 43.70 47.10 45.36 38.55 22.23 6.26 3.15 22.23 RELATIVE HUMIDITY (MEAN %) 65 43 60 56 29 18 18 19 16 39 70 80 43 RELATIVE HUMIDITY (MAX. %) 88 70 85 82 51 31 31 32 29 59 90 96 62 RELATIVE HUMIDITY (MIN. %) 38 19 34 33 13 9 10 10 7 20 43 55 24 RELATIVE HUMIDITY (MEAN% 03UTC) 83 66 80 79 50 30 31 31 28 55 87 92 59 RELATIVE HUMIDITY (MEAN% 09UTC) 44 25 42 38 16 10 11 11 8 22 49 60 28 RELATIVE HUMIDITY (MEAN% 15UTC) 56 29 47 41 19 12 12 12 11 32 63 80 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 85.2 0.2 177.8 51.5 13.0 1.0 0.0 0.0 0.0 9.7 83.8 151.5 573.7 DAYS WITH PRECIPITATION >=10 4 0 5 2 1 0 0 0 0 0 4 4 20 DAYS WITH PRECIPITATION >= 5 5 0 6 3 1 0 0 0 0 1 5 5 26 DAYS WITH PRECIPITATION >= 1 7 0 9 7 2 1 0 0 0 3 9 10 48 DAYS WITH PRECIPITATION 8 1 11 8 2 1 0 0 0 5 9 11 56 GREATEST DAILY PRECIPITATION 26.0 0.2 64.0 25.0 12.0 1.0 0.0 0.0 0.0 5.0 29.0 42.0 64.0 DAY 16 19 29 18 5 1 ** ** ** 16 12 1 DAY WITH THUNDER STORM 2 1 4 7 1 1 0 0 0 4 4 4 28 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 4 0 0 9 0 0 0 0 0 13 WIND DIRECTION (PREVAILING) 270 270 135 270 270 270 270 270 270 270 135 135 270 PREVAILING WIND SPEED(KNOTS) 8.9 9.1 10.3 8.9 9.9 10.5 11.3 10.9 11.2 9.1 9.9 8.7 10.0 PREVAILING WIND PERCENT 12.9 20.5 20.2 17.5 19.4 22.9 38.3 30.6 25.4 19.0 19.2 15.3 19.9 CALMS PERCENT OF WIND 64.5 56.3 50.0 54.2 55.6 49.2 46.4 58.1 61.3 64.1 63.3 69.8 57.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 193 237 188 239 277 280 281 276 283 269 153 164 259 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.6 1.6 1.0 2.1 3.1 5.5 3.9 3.7 1.9 2.2 1.3 1.8 WIND STEADINESES (MEAN %) 30.0 43.2 33.3 27.0 52.5 62.0 93.2 86.7 90.2 61.3 66.7 54.2 45.0 WIND SPEED (MEAN KNOTS) 3.0 3.7 4.8 3.7 4.0 5.0 5.9 4.5 4.1 3.1 3.3 2.4 4.0 FASTEST WIND DIRECTION 100 120 240 300 120 330 280 280 300 270 130 120 240 FASTEST WIND SPEED (KNOTS) 21 17 49 16 23 29 23 17 19 17 25 23 49 DAY 16 21 25 2 7 23 26 4 24 4 11 20 DAYS WITH SKY CLEAR (0-2)/8 16 20 9 13 18 25 29 31 30 20 15 13 239 DAYS WITH P.CLOUDY (3-6)/8 10 6 17 14 10 5 2 0 0 10 10 11 95 DAYS WITH CLOUDY (7-8)/8 5 2 5 3 3 0 0 0 0 1 5 7 31 DAYS WITH VISIBILITY =< 2 KM 3 0 3 1 0 0 0 0 0 0 4 10 21 DURATION OF SUNSHINE HOURS 203.7 236.1 207.7 258.7 319.1 351.0 355.4 351.3 325.5 260.8 196.8 175.7 3241.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.0 935.0 931.7 930.8 929.2 923.3 919.4 922.3 928.2 933.2 934.8 935.6 929.9 MAX. QFE PRESSURE IN HPA 940.4 940.2 939.5 937.7 932.9 929.8 922.7 926.7 933.6 937.0 939.4 941.6 941.6 DAY-HOUR 11- 6 6- 6 1- 6 13- 6 13- 6 7-21 22- 6 31-21 19- 6 31- 6 4- 6 30- 6 MIN. QFE PRESSURE IN HPA 925.1 929.9 923.2 926.7 923.5 915.9 916.0 917.1 923.6 928.6 930.6 929.1 915.9 DAY-HOUR 17-12 22-15 25- 3 28- 0 30-15 29-15 16- 0 1- 0 2-12 15-12 24-12 10-12 MEAN QNH PRESSURE IN HPA 1016.1 1016.2 1012.6 1011.7 1009.9 1003.6 999.4 1002.5 1008.8 1014.3 1016.0 1016.9 1010.7 MAX. QNH PRESSURE IN HPA 1022.0 1021.7 1021.0 1019.1 1013.9 1010.6 1003.0 1007.3 1014.7 1018.3 1020.9 1023.2 1023.2 DAY-HOUR 11- 6 6- 6 1- 6 13- 6 13- 6 7-21 22- 6 31-21 19- 6 31- 6 4- 6 30- 6 MIN. QNH PRESSURE IN HPA 1005.6 1010.7 1003.6 1007.3 1003.9 995.7 995.8 997.0 1004.0 1009.3 1011.5 1009.9 995.7 DAY-HOUR 17-12 22-15 25- 3 28- 0 30-15 29-15 16- 0 1- 0 2-12 15-12 24-12 10-12 MEAN QFF PRESSURE IN HPA 1016.1 1016.1 1011.8 1009.1 1005.3 997.4 992.7 996.0 1003.4 1010.1 1014.3 1016.5 1007.4 MAX. QFF PRESSURE IN HPA 1021.8 1024.1 1021.5 1018.4 1010.9 1005.5 996.1 1001.0 1009.5 1015.2 1019.1 1023.4 1024.1 DAY-HOUR 7- 6 7- 6 1- 6 13- 6 6- 6 8- 3 22- 6 31-21 19- 6 31- 6 5- 9 30- 6 MIN. QFF PRESSURE IN HPA 1005.0 1008.4 1002.0 1003.1 997.8 989.2 988.9 990.0 997.9 1004.5 1009.8 1009.1 988.9 DAY-HOUR 17-12 22-12 25- 3 28- 0 31- 0 29-18 30-21 1-12 2-12 15-12 24-12 10-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 934.8 934.7 931.4 930.5 928.9 923.0 919.0 921.8 927.8 932.9 934.4 935.2 929.5 MAX. QFE PRESSURE IN HPA 938.7 938.4 938.1 936.3 931.3 929.0 921.6 925.4 931.9 935.3 938.0 940.3 940.3 DAY 11 7 1 13 7 8 23 17 30 31 8 30 MIN. QFE PRESSURE IN HPA 927.2 931.2 926.1 926.7 924.2 916.4 916.0 917.1 924.5 930.4 931.7 930.9 916.0 DAY 26 23 16 28 31 29 16 1 3 6 24 10 MEAN QNH PRESSURE IN HPA 1016.0 1015.8 1012.4 1011.4 1009.6 1003.3 999.0 1002.1 1008.5 1013.9 1015.6 1016.4 1010.3 MAX. QNH PRESSURE IN HPA 1020.1 1019.8 1019.5 1017.6 1012.2 1009.8 1001.8 1005.9 1012.9 1016.5 1019.4 1021.9 1021.9 DAY 11 7 1 13 7 8 23 17 30 31 8 30 MIN. QNH PRESSURE IN HPA 1007.8 1012.1 1006.7 1007.3 1004.6 996.3 995.8 997.0 1004.9 1011.3 1012.6 1011.8 995.8 DAY 26 23 16 28 31 29 16 1 3 6 24 10 MEAN QFF PRESSURE IN HPA 1015.7 1015.5 1011.4 1008.8 1005.0 997.0 992.3 995.5 1002.9 1009.6 1013.7 1015.8 1006.9 MAX. QFF PRESSURE IN HPA 1019.2 1021.5 1020.3 1017.3 1009.5 1004.0 994.8 1000.0 1007.7 1013.3 1016.8 1022.2 1022.2 DAY 11 7 1 13 7 8 23 17 30 29 30 30 MIN. QFF PRESSURE IN HPA 1008.1 1009.6 1004.7 1003.1 997.8 989.2 989.0 990.0 998.7 1005.8 1011.2 1010.1 989.0 DAY 17 23 24 28 31 29 16 1 3 6 19 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 935.0 935.0 931.6 930.9 929.5 923.7 919.6 922.4 928.4 933.5 934.8 935.5 930.0 MAX. QFE PRESSURE IN HPA 939.4 938.8 938.5 936.6 932.1 929.7 922.1 925.9 932.2 936.3 938.4 940.4 940.4 DAY 11 7 1 13 13 8 22 17 30 31 8 30 MIN. QFE PRESSURE IN HPA 926.8 931.7 923.2 928.2 925.2 917.4 916.6 917.5 925.3 930.7 931.7 930.4 916.6 DAY 17 22 25 7 31 29 16 1 2 6 24 14 MEAN QNH PRESSURE IN HPA 1016.2 1016.2 1012.5 1011.8 1010.3 1004.0 999.7 1002.7 1009.1 1014.5 1015.9 1016.7 1010.8 MAX. QNH PRESSURE IN HPA 1020.9 1020.2 1019.9 1017.9 1013.1 1010.5 1002.4 1006.4 1013.2 1017.6 1019.8 1022.0 1022.0 DAY 11 7 1 13 13 8 22 17 30 31 8 30 MIN. QNH PRESSURE IN HPA 1007.4 1012.6 1003.6 1008.9 1005.7 997.3 996.5 997.5 1005.8 1011.6 1012.6 1011.3 996.5 DAY 17 22 25 7 31 29 16 1 2 6 24 14 MEAN QFF PRESSURE IN HPA 1016.5 1016.5 1012.0 1009.6 1006.2 998.3 993.6 996.8 1004.3 1010.8 1014.6 1016.7 1008.0 MAX. QFF PRESSURE IN HPA 1020.8 1022.6 1021.3 1018.1 1010.4 1005.5 996.0 1000.9 1008.8 1014.7 1017.9 1022.4 1022.6 DAY 11 7 1 13 6 8 22 17 30 31 30 30 MIN. QFF PRESSURE IN HPA 1006.8 1010.0 1002.0 1005.5 999.7 990.7 990.1 991.0 1000.2 1006.7 1011.7 1010.9 990.1 DAY 17 22 25 28 31 29 16 1 3 6 11 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.3 936.3 932.9 932.0 930.3 924.3 920.2 923.1 929.4 934.6 936.1 936.8 931.0 MAX. QFE PRESSURE IN HPA 940.4 940.2 939.5 937.7 932.9 929.5 922.7 926.6 933.6 937.0 939.4 941.6 941.6 DAY 11 6 1 13 13 8 22 10 19 31 4 30 MIN. QFE PRESSURE IN HPA 927.0 932.7 924.3 929.1 925.8 918.0 917.2 918.6 925.5 931.9 932.9 930.9 917.2 DAY 17 22 29 7 31 29 12 1 2 15 24 14 MEAN QNH PRESSURE IN HPA 1017.5 1017.6 1013.9 1013.0 1011.1 1004.7 1000.3 1003.5 1010.2 1015.7 1017.3 1018.2 1011.9 MAX. QNH PRESSURE IN HPA 1022.0 1021.7 1021.0 1019.1 1013.9 1010.3 1003.0 1007.2 1014.7 1018.3 1020.9 1023.2 1023.2 DAY 11 6 1 13 13 8 22 10 19 31 4 30 MIN. QNH PRESSURE IN HPA 1007.6 1013.7 1004.7 1009.9 1006.3 998.0 997.1 998.6 1006.0 1012.9 1013.9 1011.8 997.1 DAY 17 22 29 7 31 29 12 1 2 15 24 14 MEAN QFF PRESSURE IN HPA 1017.7 1017.6 1013.1 1010.4 1006.4 998.3 993.4 996.8 1004.5 1011.5 1015.7 1018.0 1008.6 MAX. QFF PRESSURE IN HPA 1021.8 1024.1 1021.5 1018.4 1010.9 1004.4 996.1 1000.8 1009.5 1015.2 1018.7 1023.4 1024.1 DAY 7 7 1 13 6 4 22 31 19 31 4 30 MIN. QFF PRESSURE IN HPA 1007.3 1011.4 1003.8 1006.4 999.8 990.3 990.3 991.4 999.6 1007.6 1012.6 1011.6 990.3 DAY 17 22 29 29 31 29 16 1 2 6 24 14 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 935.4 935.7 932.4 931.4 929.8 923.8 919.8 922.6 928.6 933.5 935.3 935.8 930.3 MAX. QFE PRESSURE IN HPA 939.1 939.6 939.0 936.8 932.4 929.0 922.1 926.3 932.5 936.2 939.4 940.4 940.4 DAY 10 7 1 13 12 4 22 31 19 31 4 29 MIN. QFE PRESSURE IN HPA 926.2 932.0 924.9 928.7 925.5 917.4 916.7 918.1 924.9 930.7 931.8 931.3 916.7 DAY 17 22 29 27 31 29 16 1 2 15 24 14 MEAN QNH PRESSURE IN HPA 1016.6 1016.9 1013.4 1012.3 1010.6 1004.2 999.9 1002.9 1009.3 1014.6 1016.4 1017.1 1011.2 MAX. QNH PRESSURE IN HPA 1020.6 1021.1 1020.5 1018.1 1013.4 1009.8 1002.4 1006.9 1013.5 1017.5 1020.9 1022.0 1022.0 DAY 10 7 1 13 12 4 22 31 19 31 4 29 MIN. QNH PRESSURE IN HPA 1006.8 1013.0 1005.4 1009.4 1006.0 997.3 996.6 998.1 1005.4 1011.6 1012.8 1012.2 996.6 DAY 17 22 29 27 31 29 16 1 2 15 24 14 MEAN QFF PRESSURE IN HPA 1016.3 1016.5 1012.4 1009.5 1005.8 997.8 992.9 996.0 1003.4 1010.0 1014.5 1016.4 1007.6 MAX. QFF PRESSURE IN HPA 1020.2 1022.6 1020.4 1017.5 1010.3 1004.5 995.2 1000.4 1008.0 1014.3 1019.1 1021.9 1022.6 DAY 19 7 1 12 6 4 22 31 19 31 5 29 MIN. QFF PRESSURE IN HPA 1006.2 1010.1 1004.4 1005.4 999.2 990.3 989.7 990.4 998.9 1006.2 1010.9 1011.6 989.7 DAY 17 22 29 27 31 29 30 1 2 6 24 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 933.8 934.0 930.9 930.1 928.4 922.7 918.9 921.4 927.2 932.2 934.0 934.7 929.0 MAX. QFE PRESSURE IN HPA 937.7 938.0 937.4 935.1 931.2 927.8 920.8 925.5 930.8 934.8 937.4 939.4 939.4 DAY 8 7 11 13 12 4 19 31 18 31 4 29 MIN. QFE PRESSURE IN HPA 925.1 930.1 924.4 927.3 924.2 916.3 916.0 917.3 923.6 928.6 930.6 929.1 916.0 DAY 17 22 29 27 30 29 16 1 2 15 24 10 MEAN QNH PRESSURE IN HPA 1014.9 1015.1 1011.8 1010.9 1009.1 1003.0 999.0 1001.7 1007.8 1013.1 1015.1 1015.9 1009.8 MAX. QNH PRESSURE IN HPA 1019.1 1019.4 1018.7 1016.3 1012.1 1008.5 1001.0 1006.0 1011.7 1016.0 1018.7 1020.9 1020.9 DAY 8 7 11 13 12 4 19 31 18 31 4 29 MIN. QNH PRESSURE IN HPA 1005.6 1010.9 1004.8 1007.9 1004.6 996.2 995.8 997.2 1004.0 1009.3 1011.5 1009.9 995.8 DAY 17 22 29 27 30 29 16 1 2 15 24 10 MEAN QFF PRESSURE IN HPA 1014.6 1014.9 1010.8 1008.3 1004.5 996.8 992.2 995.2 1002.4 1008.9 1013.3 1015.3 1006.4 MAX. QFF PRESSURE IN HPA 1018.6 1021.2 1018.9 1015.9 1009.3 1003.5 994.4 1000.0 1006.5 1012.7 1016.6 1021.2 1021.2 DAY 19 7 1 12 6 4 4 31 18 27 5 29 MIN. QFF PRESSURE IN HPA 1005.0 1008.4 1003.2 1003.9 998.2 989.2 989.1 990.0 997.9 1004.5 1009.8 1009.1 989.1 DAY 17 22 29 28 31 29 16 1 2 15 24 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.3 934.1 930.8 929.8 928.2 922.4 918.6 921.6 927.3 932.6 934.3 935.4 929.1 MAX. QFE PRESSURE IN HPA 938.1 937.6 937.8 934.9 930.9 927.8 920.7 925.3 931.0 935.2 937.6 940.1 940.1 DAY 10 7 11 13 15 7 22 31 18 31 4 29 MIN. QFE PRESSURE IN HPA 926.0 929.9 924.7 927.1 923.5 915.9 916.3 917.3 923.6 929.8 931.6 930.6 915.9 DAY 25 22 24 27 30 29 16 1 2 15 24 10 MEAN QNH PRESSURE IN HPA 1015.4 1015.2 1011.6 1010.7 1008.9 1002.7 998.6 1001.8 1007.9 1013.7 1015.4 1016.6 1009.9 MAX. QNH PRESSURE IN HPA 1019.5 1019.0 1019.2 1016.1 1011.8 1008.5 1000.9 1005.8 1011.9 1016.4 1019.0 1021.6 1021.6 DAY 10 7 11 13 15 7 22 31 18 31 4 29 MIN. QNH PRESSURE IN HPA 1006.5 1010.7 1005.2 1007.7 1003.9 995.7 996.2 997.2 1004.0 1010.6 1012.5 1011.5 995.7 DAY 25 22 24 27 30 29 16 1 2 15 24 10 MEAN QFF PRESSURE IN HPA 1015.7 1015.5 1011.1 1008.5 1004.8 997.0 992.4 995.9 1003.1 1010.0 1014.1 1016.5 1007.1 MAX. QFF PRESSURE IN HPA 1019.6 1021.2 1019.3 1016.2 1009.6 1003.8 994.8 1000.6 1007.3 1014.0 1017.0 1021.9 1021.9 DAY 10 7 1 12 6 4 22 31 29 28 5 29 MIN. QFF PRESSURE IN HPA 1007.0 1008.7 1003.3 1004.0 998.1 989.5 989.5 990.7 998.5 1006.0 1011.6 1010.7 989.5 DAY 17 21 24 28 30 29 30 1 2 6 24 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 935.2 935.2 931.7 930.8 929.2 923.4 919.5 922.7 928.5 933.5 935.0 935.9 930.0 MAX. QFE PRESSURE IN HPA 938.7 939.4 938.2 936.1 932.1 929.5 921.4 926.2 932.4 936.2 938.8 940.9 940.9 DAY 7 6 11 12 7 7 22 31 18 28 7 29 MIN. QFE PRESSURE IN HPA 926.3 931.0 925.5 927.9 925.0 916.7 917.1 918.7 924.8 931.0 932.4 930.8 916.7 DAY 25 22 24 28 31 29 30 1 2 6 23 10 MEAN QNH PRESSURE IN HPA 1016.4 1016.4 1012.7 1011.7 1010.0 1003.8 999.5 1003.0 1009.2 1014.6 1016.2 1017.1 1010.9 MAX. QNH PRESSURE IN HPA 1020.1 1020.9 1019.6 1017.4 1013.1 1010.3 1001.6 1006.8 1013.4 1017.5 1020.2 1022.5 1022.5 DAY 7 6 11 12 7 7 22 31 18 28 7 29 MIN. QNH PRESSURE IN HPA 1006.9 1011.9 1006.0 1008.6 1005.5 996.6 997.0 998.7 1005.3 1011.9 1013.4 1011.7 996.6 DAY 25 22 24 28 31 29 30 1 2 6 23 10 MEAN QFF PRESSURE IN HPA 1016.5 1016.4 1011.9 1009.1 1005.1 997.2 992.7 996.3 1003.5 1010.3 1014.5 1016.9 1007.5 MAX. QFF PRESSURE IN HPA 1020.3 1022.8 1019.0 1017.0 1010.0 1004.2 994.8 1000.8 1008.2 1014.9 1018.0 1022.6 1022.8 DAY 7 6 1 12 6 4 22 31 18 28 7 29 MIN. QFF PRESSURE IN HPA 1007.1 1010.0 1004.5 1004.2 999.0 989.2 989.5 991.5 998.7 1006.6 1012.5 1010.7 989.2 DAY 25 22 24 28 31 29 30 1 2 6 19 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 935.1 935.3 931.8 931.0 929.2 923.2 919.5 922.5 928.2 933.3 934.9 935.8 930.0 MAX. QFE PRESSURE IN HPA 938.9 938.6 938.9 936.5 932.1 929.8 922.5 926.7 932.5 936.5 938.7 940.5 940.5 DAY 7 6 11 12 7 7 22 31 18 28 4 29 MIN. QFE PRESSURE IN HPA 926.3 931.4 923.5 927.6 924.9 916.7 916.7 919.0 925.3 930.8 931.8 931.2 916.7 DAY 25 22 24 27 30 29 15 1 2 15 23 10 MEAN QNH PRESSURE IN HPA 1016.2 1016.5 1012.7 1011.9 1009.9 1003.5 999.6 1002.8 1008.9 1014.3 1016.0 1017.0 1010.8 MAX. QNH PRESSURE IN HPA 1020.4 1020.0 1020.4 1017.8 1013.1 1010.6 1002.8 1007.3 1013.5 1017.8 1020.1 1022.1 1022.1 DAY 7 6 11 12 7 7 22 31 18 28 4 29 MIN. QNH PRESSURE IN HPA 1006.9 1012.3 1003.9 1008.3 1005.4 996.6 996.6 999.1 1005.8 1011.7 1012.8 1012.1 996.6 DAY 25 22 24 27 30 29 15 1 2 15 23 10 MEAN QFF PRESSURE IN HPA 1015.9 1016.1 1011.6 1009.0 1005.0 997.0 992.5 995.9 1003.0 1009.7 1014.1 1016.4 1007.2 MAX. QFF PRESSURE IN HPA 1019.3 1021.4 1018.9 1017.3 1010.0 1004.4 995.7 1001.0 1007.9 1014.3 1018.1 1022.1 1022.1 DAY 7 6 11 12 6 7 22 31 18 28 4 29 MIN. QFF PRESSURE IN HPA 1007.1 1010.4 1002.0 1004.2 998.5 989.5 988.9 991.4 999.0 1006.2 1011.2 1011.4 988.9 DAY 25 21 24 27 30 28 30 1 2 5 23 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.7 11.4 13.9 21.1 28.7 34.3 35.6 35.0 31.1 24.8 19.0 16.1 23.3 MINIMUN AIR TEMPERATURE (C) 4.5 6.4 8.8 12.8 19.7 24.3 27.0 26.4 22.2 15.8 10.4 8.1 15.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 12 27 31 31 26 2 0 0 129 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 5 0 0 0 0 0 0 0 0 0 0 0 5 TEMPERATURE RECORDS LOWEST(C) -4.0 0.4 2.8 8.2 13.0 20.0 22.6 22.6 18.8 11.8 7.4 4.4 -4.0 DAY 14 14 3 7 4 1 9 23 8 30 26 13 MAXIMUM AIR TEMPERATURE (C) 13.7 16.9 19.4 28.2 35.9 42.0 42.7 42.7 39.0 33.4 28.2 25.8 30.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 15 28 30 31 31 30 30 2 1 198 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.4 22.8 28.6 32.2 41.8 44.8 46.6 44.6 42.0 37.2 30.2 30.0 46.6 DAY 20 6 28 19 28 29 13 13 1 2 14 10 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 10.5 10.6 15.4 16.2 17.7 15.7 16.3 16.8 17.6 17.8 17.7 15.2 MEAN DAILY TEMP. (MDT) (C) 9.1 11.7 14.1 20.5 27.8 33.1 34.8 34.5 30.6 24.6 19.3 16.9 23.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.7 28.9 210.7 364.3 428.2 419.5 287.4 111.6 1.6 0.0 1853.0 HEATING DEG. DAYS(BASE 18 0C) 275.9 177.5 126.9 11.6 0.0 0.0 0.0 0.0 0.0 0.0 2.0 38.3 632.2 DEWPOINT (MEAN C) 4.5 5.3 8.2 7.0 4.8 5.0 7.2 11.2 7.7 3.3 0.4 -3.4 5.1 MIXING RATIO (G/KG) 5.85 6.24 7.55 7.08 5.96 6.06 7.22 9.91 7.61 5.43 4.47 3.56 6.41 VAPOUR PRESSURE (HPA) 8.71 9.27 11.18 10.47 8.80 8.90 10.55 14.43 11.17 8.06 6.66 5.33 9.46 SATURATION DEF. (HPA) 2.93 4.82 5.35 16.02 32.66 47.84 49.61 44.05 36.08 25.11 16.66 14.21 24.61 RELATIVE HUMIDITY (MEAN %) 78 70 71 46 25 18 20 28 27 28 33 31 40 RELATIVE HUMIDITY (MAX. %) 96 90 92 73 43 32 33 47 46 46 55 46 58 RELATIVE HUMIDITY (MIN. %) 53 45 46 24 12 9 10 13 11 13 14 15 22 RELATIVE HUMIDITY (MEAN% 03UTC) 91 88 86 70 41 31 33 44 44 42 50 44 55 RELATIVE HUMIDITY (MEAN% 09UTC) 60 51 55 27 14 10 11 14 13 15 16 17 25 RELATIVE HUMIDITY (MEAN% 15UTC) 74 62 65 34 17 13 14 23 21 22 28 27 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 219.7 139.9 181.7 0.1 0.0 0.3 0.1 27.0 0.0 1.7 0.0 0.0 570.5 DAYS WITH PRECIPITATION >=10 4 5 7 0 0 0 0 1 0 0 0 0 17 DAYS WITH PRECIPITATION >= 5 9 8 9 0 0 0 0 1 0 0 0 0 27 DAYS WITH PRECIPITATION >= 1 9 8 12 0 0 0 0 1 0 1 0 0 31 DAYS WITH PRECIPITATION 11 10 12 1 0 1 1 1 0 1 0 0 38 GREATEST DAILY PRECIPITATION 138.0 50.0 46.0 0.1 0.0 0.3 0.1 27.0 0.0 1.7 0.0 0.0 138.0 DAY 5 12 30 1 ** 16 21 25 ** 11 ** ** DAY WITH THUNDER STORM 3 7 6 0 3 3 0 1 1 1 0 0 25 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 0 0 0 0 0 0 0 1 0 0 0 1 WIND DIRECTION (PREVAILING) 135 135 135 270 270 270 270 270 270 270 135 270 270 PREVAILING WIND SPEED(KNOTS) 9.4 9.1 9.0 10.9 11.5 10.8 12.3 11.7 10.9 9.5 7.3 6.0 10.6 PREVAILING WIND PERCENT 19.4 20.1 21.8 18.3 23.4 17.9 29.0 21.4 25.4 16.1 8.3 7.3 16.6 CALMS PERCENT OF WIND 58.1 55.4 57.3 52.9 56.0 48.8 52.4 56.5 60.4 67.7 74.2 80.2 60.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 174 161 170 253 273 283 274 258 279 251 222 215 252 VECTOR WIND MAGNITUDE(KNOTS) 1.6 1.6 1.6 1.9 3.2 2.3 4.1 2.2 3.3 1.3 0.9 0.6 1.6 WIND STEADINESES (MEAN %) 42.1 40.0 40.0 42.2 64.0 40.4 74.5 42.3 76.7 43.3 45.0 46.2 40.0 WIND SPEED (MEAN KNOTS) 3.8 4.0 4.0 4.5 5.0 5.7 5.5 5.2 4.3 3.0 2.0 1.3 4.0 FASTEST WIND DIRECTION 110 120 120 270 300 330 120 280 360 360 300 280 120 FASTEST WIND SPEED (KNOTS) 23 29 27 27 23 27 23 27 23 25 16 16 29 DAY 20 9 17 30 1 1 21 25 13 9 4 20 DAYS WITH SKY CLEAR (0-2)/8 13 11 10 17 27 28 27 28 30 28 23 19 261 DAYS WITH P.CLOUDY (3-6)/8 10 11 9 9 4 2 4 3 0 3 7 10 72 DAYS WITH CLOUDY (7-8)/8 8 6 12 4 0 0 0 0 0 0 0 2 32 DAYS WITH VISIBILITY =< 2 KM 12 2 0 0 0 0 0 0 1 0 0 0 15 DURATION OF SUNSHINE HOURS 184.8 186.0 171.2 270.6 349.4 351.5 359.8 349.7 321.2 306.3 273.2 245.1 3368.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.9 934.2 933.3 930.7 928.4 923.3 919.9 922.7 926.3 931.6 935.1 936.9 929.8 MAX. QFE PRESSURE IN HPA 940.4 940.8 938.8 938.6 934.0 929.1 925.0 927.7 931.6 938.0 939.5 941.7 941.7 DAY-HOUR 4- 6 5- 6 27- 6 12- 6 8- 6 5- 6 22- 6 25-21 26- 6 25- 6 21- 6 9- 6 MIN. QFE PRESSURE IN HPA 926.8 928.7 925.7 924.2 922.8 916.4 914.8 918.1 922.1 926.5 931.8 932.4 914.8 DAY-HOUR 13- 6 12- 3 1-12 23- 0 30- 0 30-12 2-15 13-12 3-15 1-12 18-12 21-12 MEAN QNH PRESSURE IN HPA 1016.1 1015.3 1014.3 1011.6 1009.1 1003.7 1000.0 1003.0 1006.9 1012.5 1016.3 1018.2 1010.6 MAX. QNH PRESSURE IN HPA 1022.0 1022.4 1020.2 1020.0 1015.1 1009.9 1005.5 1008.4 1012.5 1019.4 1021.0 1023.3 1023.3 DAY-HOUR 4- 6 5- 6 27- 6 12- 6 8- 6 5- 6 22- 6 25-21 26- 6 25- 6 21- 6 9- 6 MIN. QNH PRESSURE IN HPA 1007.4 1009.4 1006.2 1004.6 1003.1 996.3 994.6 998.1 1002.4 1007.1 1012.8 1013.4 994.6 DAY-HOUR 13- 6 12- 3 1-12 23- 0 30- 0 30-12 2-15 13-12 3-15 1-12 18-12 21-12 MEAN QFF PRESSURE IN HPA 1016.6 1015.0 1013.2 1008.4 1003.9 997.0 992.9 995.9 1000.9 1008.4 1013.9 1016.7 1006.9 MAX. QFF PRESSURE IN HPA 1023.7 1021.9 1018.9 1016.3 1010.2 1003.4 998.8 1002.2 1006.4 1015.8 1018.6 1022.5 1023.7 DAY-HOUR 14-18 24- 6 22- 6 12- 6 3- 6 5- 6 23- 6 25-18 26- 6 25- 6 21- 6 8- 6 MIN. QFF PRESSURE IN HPA 1007.7 1008.3 1004.0 1000.2 997.3 989.3 987.7 990.8 995.9 1001.6 1010.1 1011.8 987.7 DAY-HOUR 12-21 12- 0 1-12 23- 0 30- 0 30-12 2-12 13-12 3-12 1-12 17-12 21-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 934.7 934.0 932.6 930.3 928.0 923.1 919.5 922.4 925.9 931.2 934.9 936.8 929.4 MAX. QFE PRESSURE IN HPA 938.5 938.8 936.9 936.3 932.1 927.6 923.8 925.3 929.6 935.8 937.7 940.1 940.1 DAY 22 5 22 12 8 5 23 29 26 26 21 7 MIN. QFE PRESSURE IN HPA 928.2 929.1 927.5 924.2 922.8 917.6 915.7 919.7 922.8 927.1 933.1 933.2 915.7 DAY 13 12 1 23 30 30 12 14 4 1 18 21 MEAN QNH PRESSURE IN HPA 1015.8 1015.1 1013.6 1011.1 1008.7 1003.5 999.6 1002.7 1006.5 1012.1 1016.1 1018.1 1010.2 MAX. QNH PRESSURE IN HPA 1019.9 1020.2 1018.2 1017.6 1013.1 1008.3 1004.2 1005.8 1010.4 1017.0 1019.1 1021.6 1021.6 DAY 22 5 22 12 8 5 23 29 26 26 21 7 MIN. QNH PRESSURE IN HPA 1008.9 1009.9 1008.2 1004.6 1003.1 997.6 995.5 999.8 1003.1 1007.7 1014.1 1014.3 995.5 DAY 13 12 1 23 30 30 12 14 4 1 18 21 MEAN QFF PRESSURE IN HPA 1016.0 1014.6 1012.4 1008.0 1003.6 996.9 992.5 995.5 1000.4 1007.8 1013.4 1016.1 1006.4 MAX. QFF PRESSURE IN HPA 1021.3 1019.1 1017.6 1015.2 1008.8 1002.1 997.1 998.9 1004.3 1013.5 1016.5 1020.2 1021.3 DAY 15 5 22 7 3 5 23 26 26 26 21 7 MIN. QFF PRESSURE IN HPA 1009.7 1008.3 1005.8 1000.2 997.3 990.4 988.3 992.4 996.8 1002.0 1011.3 1012.4 988.3 DAY 13 12 1 23 30 30 12 14 4 1 14 3 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 934.7 934.2 933.0 930.8 928.7 923.9 920.2 923.1 926.6 931.8 935.3 937.0 929.9 MAX. QFE PRESSURE IN HPA 938.8 938.8 937.1 936.9 932.8 928.2 924.3 926.2 930.3 936.4 937.7 940.3 940.3 DAY 22 5 22 12 8 5 23 25 26 29 21 10 MIN. QFE PRESSURE IN HPA 927.2 928.7 927.0 924.4 923.4 918.6 916.2 920.2 923.6 927.6 933.1 933.5 916.2 DAY 13 12 1 21 30 30 12 13 3 4 18 22 MEAN QNH PRESSURE IN HPA 1015.9 1015.3 1014.1 1011.7 1009.5 1004.3 1000.4 1003.4 1007.2 1012.7 1016.5 1018.4 1010.8 MAX. QNH PRESSURE IN HPA 1020.2 1020.2 1018.4 1018.2 1013.8 1008.9 1004.7 1006.8 1011.2 1017.7 1019.1 1021.9 1021.9 DAY 22 5 22 12 8 5 23 25 26 29 21 10 MIN. QNH PRESSURE IN HPA 1007.8 1009.4 1007.6 1004.8 1003.8 998.6 996.1 1000.3 1004.0 1008.3 1014.1 1014.6 996.1 DAY 13 12 1 21 30 30 12 13 3 4 18 22 MEAN QFF PRESSURE IN HPA 1016.6 1015.3 1013.3 1009.0 1004.7 998.1 993.8 996.9 1001.8 1009.2 1014.7 1017.4 1007.6 MAX. QFF PRESSURE IN HPA 1021.9 1020.7 1018.4 1016.2 1010.1 1003.2 998.2 1000.8 1005.8 1015.2 1017.8 1021.5 1021.9 DAY 15 24 22 7 3 5 23 26 26 29 27 7 MIN. QFF PRESSURE IN HPA 1009.1 1008.4 1005.9 1001.2 998.3 992.0 989.1 993.6 997.6 1003.6 1012.3 1012.8 989.1 DAY 13 12 1 23 30 30 12 13 3 1 11 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.0 935.5 934.3 931.9 929.5 924.4 920.8 923.8 927.6 933.1 936.6 938.5 931.0 MAX. QFE PRESSURE IN HPA 940.4 940.8 938.8 938.6 934.0 929.1 925.0 927.4 931.6 938.0 939.5 941.7 941.7 DAY 4 5 27 12 8 5 22 25 26 25 21 9 MIN. QFE PRESSURE IN HPA 926.8 930.1 927.6 925.1 923.4 918.8 916.4 920.6 924.1 928.6 934.2 935.1 916.4 DAY 13 12 1 21 30 30 12 13 3 4 18 21 MEAN QNH PRESSURE IN HPA 1017.2 1016.7 1015.4 1012.9 1010.3 1004.8 1001.0 1004.2 1008.3 1014.1 1017.9 1020.0 1011.9 MAX. QNH PRESSURE IN HPA 1022.0 1022.4 1020.2 1020.0 1015.1 1009.9 1005.5 1008.0 1012.5 1019.4 1021.0 1023.3 1023.3 DAY 4 5 27 12 8 5 22 25 26 25 21 9 MIN. QNH PRESSURE IN HPA 1007.4 1010.9 1008.3 1005.6 1003.8 998.8 996.3 1000.8 1004.5 1009.3 1015.3 1016.3 996.3 DAY 13 12 1 21 30 30 12 13 3 4 18 21 MEAN QFF PRESSURE IN HPA 1017.9 1016.4 1014.2 1009.5 1004.8 997.8 993.7 997.0 1002.3 1009.9 1015.4 1018.7 1008.1 MAX. QFF PRESSURE IN HPA 1022.9 1021.9 1018.9 1016.3 1010.2 1003.4 998.8 1001.5 1006.4 1015.8 1018.6 1022.5 1022.9 DAY 15 24 22 12 3 5 23 25 26 25 21 8 MIN. QFF PRESSURE IN HPA 1008.8 1010.4 1006.7 1001.2 997.5 991.2 988.4 993.2 997.8 1004.1 1012.6 1015.0 988.4 DAY 13 12 1 21 30 30 12 13 3 1 1 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 935.3 934.9 933.8 931.6 928.9 923.9 920.3 923.1 926.9 931.9 935.4 937.2 930.3 MAX. QFE PRESSURE IN HPA 940.1 939.6 937.7 937.5 933.0 928.4 924.3 926.4 930.0 936.5 938.1 940.5 940.5 DAY 4 5 22 12 8 5 22 25 25 25 21 10 MIN. QFE PRESSURE IN HPA 927.9 929.9 927.3 925.3 923.7 918.1 916.4 919.9 923.7 927.7 933.0 933.4 916.4 DAY 13 12 1 21 30 30 12 13 3 4 18 21 MEAN QNH PRESSURE IN HPA 1016.5 1016.0 1014.9 1012.5 1009.6 1004.3 1000.5 1003.4 1007.5 1012.9 1016.6 1018.6 1011.1 MAX. QNH PRESSURE IN HPA 1021.6 1021.1 1019.1 1018.9 1014.0 1009.1 1004.7 1007.0 1010.8 1017.8 1019.5 1022.1 1022.1 DAY 4 5 22 12 8 5 22 25 25 25 21 10 MIN. QNH PRESSURE IN HPA 1008.6 1010.7 1007.9 1005.8 1004.1 998.1 996.3 1000.0 1004.1 1008.4 1014.0 1014.5 996.3 DAY 13 12 1 21 30 30 12 13 3 4 18 21 MEAN QFF PRESSURE IN HPA 1016.7 1015.4 1013.5 1009.1 1004.1 997.3 993.2 996.2 1001.2 1008.4 1013.7 1016.6 1007.1 MAX. QFF PRESSURE IN HPA 1022.0 1019.9 1017.9 1015.0 1009.3 1002.6 997.4 1000.0 1004.7 1013.7 1016.7 1020.3 1022.0 DAY 14 24 22 7 3 5 22 25 25 25 30 7 MIN. QFF PRESSURE IN HPA 1010.2 1010.2 1005.9 1001.0 998.0 990.5 988.6 992.6 997.2 1002.8 1011.2 1013.0 988.6 DAY 13 12 1 21 30 30 12 13 3 1 17 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 934.1 933.2 932.5 930.3 927.7 922.6 919.2 921.7 925.4 930.5 934.0 935.8 928.9 MAX. QFE PRESSURE IN HPA 938.9 937.4 937.2 935.5 931.1 927.1 922.8 924.8 928.6 935.2 936.6 938.8 938.9 DAY 4 5 26 12 7 5 22 25 25 25 21 6 MIN. QFE PRESSURE IN HPA 929.0 928.8 925.7 924.7 923.2 916.4 915.2 918.1 922.3 926.5 931.8 932.4 915.2 DAY 29 12 1 21 30 30 2 13 3 1 18 21 MEAN QNH PRESSURE IN HPA 1015.3 1014.3 1013.5 1011.1 1008.3 1002.9 999.3 1002.0 1005.9 1011.4 1015.1 1017.0 1009.7 MAX. QNH PRESSURE IN HPA 1020.4 1018.7 1018.5 1016.7 1012.0 1007.7 1003.1 1005.3 1009.3 1016.4 1017.9 1020.2 1020.4 DAY 4 5 26 12 7 5 22 25 25 25 21 6 MIN. QNH PRESSURE IN HPA 1009.8 1009.5 1006.2 1005.2 1003.6 996.3 995.0 998.1 1002.6 1007.1 1012.8 1013.4 995.0 DAY 29 12 1 21 30 30 2 13 3 1 18 21 MEAN QFF PRESSURE IN HPA 1015.5 1013.7 1012.2 1007.9 1003.2 996.4 992.2 995.0 1000.0 1007.2 1012.4 1015.1 1005.9 MAX. QFF PRESSURE IN HPA 1021.5 1018.1 1017.2 1013.4 1008.1 1001.5 996.3 998.2 1003.5 1013.0 1015.2 1018.9 1021.5 DAY 14 24 22 12 3 5 22 24 25 25 21 7 MIN. QFF PRESSURE IN HPA 1009.3 1008.7 1004.0 1000.3 998.2 989.3 987.7 990.8 995.9 1001.6 1010.1 1011.8 987.7 DAY 29 12 1 21 30 30 2 13 3 1 17 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.4 933.6 932.9 929.9 927.5 922.3 919.0 921.6 925.4 930.9 934.6 936.3 929.0 MAX. QFE PRESSURE IN HPA 938.6 938.4 936.8 934.9 931.1 927.0 922.3 925.4 929.1 935.2 937.2 939.6 939.6 DAY 4 5 21 12 7 19 22 25 26 25 30 6 MIN. QFE PRESSURE IN HPA 927.5 929.2 926.1 924.7 923.2 916.4 914.8 918.4 922.1 926.7 932.4 932.8 914.8 DAY 12 12 1 21 30 30 2 13 3 1 17 21 MEAN QNH PRESSURE IN HPA 1015.6 1014.6 1013.9 1010.8 1008.1 1002.6 999.0 1001.8 1005.9 1011.8 1015.8 1017.6 1009.8 MAX. QNH PRESSURE IN HPA 1020.0 1019.8 1018.1 1016.1 1012.0 1007.6 1002.6 1005.9 1009.9 1016.4 1018.5 1021.1 1021.1 DAY 4 5 21 12 7 19 22 25 26 25 30 6 MIN. QNH PRESSURE IN HPA 1008.2 1010.0 1006.7 1005.2 1003.6 996.3 994.6 998.4 1002.4 1007.3 1013.4 1013.8 994.6 DAY 12 12 1 21 30 30 2 13 3 1 17 21 MEAN QFF PRESSURE IN HPA 1016.2 1014.6 1013.0 1008.1 1003.4 996.5 992.5 995.3 1000.6 1008.3 1014.0 1016.5 1006.6 MAX. QFF PRESSURE IN HPA 1022.9 1019.4 1018.0 1013.5 1008.2 1001.8 996.3 1000.5 1004.5 1013.6 1016.8 1020.9 1022.9 DAY 14 23 21 6 2 19 22 25 26 25 21 6 MIN. QFF PRESSURE IN HPA 1008.4 1009.7 1005.4 1001.4 997.9 989.8 987.7 991.5 996.4 1002.8 1011.7 1013.0 987.7 DAY 12 12 1 21 29 30 2 12 3 1 17 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 935.3 934.3 933.6 930.6 928.4 923.4 920.2 922.9 926.5 931.9 935.3 937.0 929.9 MAX. QFE PRESSURE IN HPA 939.1 939.1 937.8 936.3 932.5 927.5 924.0 927.5 930.2 936.0 937.9 940.4 940.4 DAY 14 5 21 11 7 4 22 25 25 25 20 6 MIN. QFE PRESSURE IN HPA 928.3 930.0 928.2 925.5 924.0 917.1 916.5 919.6 922.8 927.9 933.2 933.4 916.5 DAY 12 28 1 22 29 30 2 13 3 3 17 21 MEAN QNH PRESSURE IN HPA 1016.5 1015.5 1014.7 1011.5 1009.1 1003.8 1000.3 1003.2 1007.1 1012.8 1016.5 1018.3 1010.8 MAX. QNH PRESSURE IN HPA 1020.6 1020.6 1019.2 1017.6 1013.5 1008.2 1004.4 1008.2 1011.0 1017.2 1019.3 1022.0 1022.0 DAY 14 5 21 11 7 4 22 25 25 25 20 6 MIN. QNH PRESSURE IN HPA 1009.0 1010.8 1008.9 1006.0 1004.4 997.0 996.4 999.7 1003.1 1008.6 1014.3 1014.5 996.4 DAY 12 28 1 22 29 30 2 13 3 3 17 21 MEAN QFF PRESSURE IN HPA 1017.2 1015.1 1013.5 1008.1 1003.6 996.7 993.0 995.9 1001.0 1008.6 1014.0 1016.9 1007.0 MAX. QFF PRESSURE IN HPA 1023.7 1020.4 1018.4 1014.4 1009.1 1001.4 997.4 1002.2 1005.0 1013.8 1016.9 1021.0 1023.7 DAY 14 23 21 6 2 4 22 25 25 28 20 6 MIN. QFF PRESSURE IN HPA 1009.1 1009.7 1005.9 1001.7 997.8 989.7 988.7 992.0 996.8 1003.5 1011.8 1013.3 988.7 DAY 12 11 29 22 29 30 2 13 3 1 17 2 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 935.1 934.3 933.7 930.7 928.5 923.3 920.0 922.8 926.2 931.7 935.3 936.8 929.9 MAX. QFE PRESSURE IN HPA 939.1 939.4 937.3 936.3 932.4 927.8 924.0 927.7 929.8 936.3 937.7 940.4 940.4 DAY 14 5 21 11 7 4 22 25 25 28 20 6 MIN. QFE PRESSURE IN HPA 927.4 929.1 928.7 924.8 923.4 917.8 916.2 919.7 922.8 927.5 933.6 933.6 916.2 DAY 12 11 1 22 29 29 1 13 3 3 17 20 MEAN QNH PRESSURE IN HPA 1016.3 1015.4 1014.8 1011.5 1009.2 1003.7 1000.2 1003.1 1006.8 1012.6 1016.5 1018.1 1010.7 MAX. QNH PRESSURE IN HPA 1020.6 1020.9 1018.6 1017.6 1013.4 1008.5 1004.4 1008.4 1010.6 1017.6 1019.1 1022.0 1022.0 DAY 14 5 21 11 7 4 22 25 25 28 20 6 MIN. QNH PRESSURE IN HPA 1008.0 1009.9 1009.4 1005.3 1003.8 997.8 996.1 999.8 1003.1 1008.2 1014.7 1014.7 996.1 DAY 12 11 1 22 29 29 1 13 3 3 17 20 MEAN QFF PRESSURE IN HPA 1016.5 1014.7 1013.4 1008.0 1003.6 996.6 992.7 995.7 1000.4 1008.1 1013.6 1016.2 1006.6 MAX. QFF PRESSURE IN HPA 1023.1 1020.5 1017.6 1015.2 1009.2 1001.9 997.0 1001.7 1004.1 1014.0 1016.1 1020.5 1023.1 DAY 14 23 21 6 2 4 22 25 25 28 20 6 MIN. QFF PRESSURE IN HPA 1007.7 1008.4 1007.7 1000.4 997.4 990.2 988.5 992.1 996.7 1003.1 1011.5 1012.6 988.5 DAY 12 11 14 22 29 29 1 13 3 3 16 2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.3 13.3 14.4 22.7 29.7 33.7 34.4 35.1 30.3 25.6 17.2 12.9 23.4 MINIMUN AIR TEMPERATURE (C) 6.9 8.5 8.5 15.0 20.2 23.5 25.9 27.0 21.2 17.0 10.6 6.3 15.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 11 29 31 31 13 2 0 0 118 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) 1.8 3.6 4.6 9.4 15.8 19.6 23.4 24.0 15.2 11.4 1.0 2.6 1.0 DAY 23 2 18 11 22 8 1 28 25 24 30 31 MAXIMUM AIR TEMPERATURE (C) 16.5 18.5 20.3 29.4 37.3 41.5 41.5 42.7 38.7 34.0 24.7 21.3 30.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 12 31 30 31 31 30 29 0 0 194 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.0 22.0 29.2 35.2 42.8 44.0 45.6 45.0 43.0 38.6 29.8 27.4 45.6 DAY 1 26 31 26 31 12 20 11 2 2 7 9 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 10.0 11.8 14.4 17.1 18.0 15.6 15.7 17.5 17.0 14.1 15.0 14.6 MEAN DAILY TEMP. (MDT) (C) 11.7 13.5 14.4 22.2 28.7 32.5 33.7 34.9 29.9 25.5 17.6 13.8 23.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 58.7 239.0 344.8 393.4 430.3 267.6 139.4 4.6 0.0 1877.9 HEATING DEG. DAYS(BASE 18 0C) 195.4 125.0 114.8 2.8 0.0 0.0 0.0 0.0 0.0 0.0 36.0 130.5 604.4 DEWPOINT (MEAN C) 5.0 7.4 5.1 5.6 1.0 2.6 8.3 8.9 5.3 3.4 3.4 2.9 4.9 MIXING RATIO (G/KG) 6.05 7.13 6.09 6.30 4.58 5.14 7.69 8.21 6.68 5.51 5.60 5.35 6.20 VAPOUR PRESSURE (HPA) 9.00 10.58 9.02 9.32 6.77 7.57 11.23 11.99 9.81 8.16 8.33 7.99 9.15 SATURATION DEF. (HPA) 4.74 5.13 7.99 19.62 37.16 47.28 45.26 46.61 35.88 26.50 12.31 7.67 24.68 RELATIVE HUMIDITY (MEAN %) 69 71 59 36 18 16 22 23 25 27 44 58 39 RELATIVE HUMIDITY (MAX. %) 88 91 83 58 33 28 37 38 45 46 65 86 58 RELATIVE HUMIDITY (MIN. %) 46 46 35 21 9 8 11 11 10 12 24 26 22 RELATIVE HUMIDITY (MEAN% 03UTC) 81 87 78 56 32 27 36 37 42 43 60 80 55 RELATIVE HUMIDITY (MEAN% 09UTC) 52 52 42 23 10 9 13 12 12 14 30 33 25 RELATIVE HUMIDITY (MEAN% 15UTC) 65 63 46 26 11 10 17 19 18 20 37 49 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 152.6 147.0 104.4 0.7 0.0 0.0 0.0 4.2 0.0 0.8 8.8 56.1 474.6 DAYS WITH PRECIPITATION >=10 5 6 5 0 0 0 0 0 0 0 0 2 18 DAYS WITH PRECIPITATION >= 5 6 9 6 0 0 0 0 0 0 0 0 2 23 DAYS WITH PRECIPITATION >= 1 9 10 7 0 0 0 0 1 0 0 3 3 33 DAYS WITH PRECIPITATION 12 12 10 5 0 0 0 2 0 1 5 3 50 GREATEST DAILY PRECIPITATION 43.0 33.6 41.0 0.3 0.0 0.0 0.0 4.0 0.0 0.8 4.0 33.0 43.0 DAY 16 5 2 2 ** ** ** 21 ** 27 16 11 DAY WITH THUNDER STORM 5 6 5 2 0 0 0 3 0 1 1 3 26 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 1 5 2 5 0 0 0 0 0 13 WIND DIRECTION (PREVAILING) 135 135 135 270 270 270 270 270 270 270 270 135 270 PREVAILING WIND SPEED(KNOTS) 9.4 8.5 9.7 9.8 10.9 10.7 11.3 12.3 11.0 11.2 9.3 11.2 10.5 PREVAILING WIND PERCENT 27.0 18.8 22.2 17.1 27.0 22.9 25.4 18.5 24.6 16.5 15.8 9.3 17.5 CALMS PERCENT OF WIND 53.6 59.8 49.2 52.1 48.8 55.4 54.4 58.5 62.1 67.7 67.9 79.0 59.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 150 160 166 286 285 285 276 262 277 283 256 170 264 VECTOR WIND MAGNITUDE(KNOTS) 2.1 1.5 1.9 2.8 4.3 3.9 3.5 2.0 3.2 2.3 1.4 0.7 1.7 WIND STEADINESES (MEAN %) 50.0 45.5 38.0 62.2 76.8 78.0 72.9 42.6 78.0 67.6 50.0 33.3 41.5 WIND SPEED (MEAN KNOTS) 4.2 3.3 5.0 4.5 5.6 5.0 4.8 4.7 4.1 3.4 2.8 2.1 4.1 FASTEST WIND DIRECTION 90 120 280 170 300 330 330 120 330 270 330 120 270 FASTEST WIND SPEED (KNOTS) 21 17 23 23 25 25 25 27 25 49 17 23 49 DAY 24 12 17 22 3 15 29 23 2 27 1 11 DAYS WITH SKY CLEAR (0-2)/8 10 11 14 15 29 30 28 25 29 28 16 19 254 DAYS WITH P.CLOUDY (3-6)/8 13 8 9 9 2 0 3 6 1 3 12 9 75 DAYS WITH CLOUDY (7-8)/8 8 9 8 6 0 0 0 0 0 0 2 3 36 DAYS WITH VISIBILITY =< 2 KM 7 2 1 0 1 0 4 0 0 0 0 5 20 DURATION OF SUNSHINE HOURS 165.8 170.3 218.5 249.4 357.9 370.1 330.9 314.9 321.2 296.1 232.4 230.9 3258.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.4 934.3 930.9 930.3 926.5 922.9 919.5 922.1 925.7 931.3 934.7 937.2 929.1 MAX. QFE PRESSURE IN HPA 938.4 938.6 936.0 935.4 932.6 929.2 924.1 928.4 932.1 935.3 940.2 941.0 941.0 DAY-HOUR 11- 6 12- 6 18- 6 11- 6 1- 6 2- 6 8- 6 19- 6 30- 6 29- 6 15- 6 24- 6 MIN. QFE PRESSURE IN HPA 926.5 925.8 921.5 924.6 922.1 916.9 914.5 917.4 921.3 926.6 929.6 932.5 914.5 DAY-HOUR 18- 0 5-21 2- 0 7-15 19-15 24-15 12-12 7-12 10-15 8-12 1- 0 31-12 MEAN QNH PRESSURE IN HPA 1015.5 1015.4 1011.8 1011.2 1007.0 1003.2 999.6 1002.4 1006.3 1012.2 1015.8 1018.5 1009.9 MAX. QNH PRESSURE IN HPA 1019.8 1020.0 1017.2 1016.6 1013.6 1010.0 1004.5 1009.1 1013.1 1016.5 1021.7 1022.6 1022.6 DAY-HOUR 11- 6 12- 6 18- 6 11- 6 1- 6 2- 6 8- 6 19- 6 30- 6 29- 6 15- 6 24- 6 MIN. QNH PRESSURE IN HPA 1007.1 1006.3 1001.7 1005.1 1002.4 996.8 994.2 997.3 1001.5 1007.2 1010.4 1013.5 994.2 DAY-HOUR 18- 0 5-21 2- 0 7-15 19-15 24-15 12-12 7-12 10-15 8-12 1- 0 31-12 MEAN QFF PRESSURE IN HPA 1015.1 1014.4 1010.5 1007.6 1001.6 996.8 992.8 995.4 1000.6 1007.9 1013.8 1017.8 1006.2 MAX. QFF PRESSURE IN HPA 1020.6 1019.8 1016.5 1014.5 1008.6 1003.5 998.0 1001.9 1007.9 1013.6 1020.0 1022.6 1022.6 DAY-HOUR 11- 6 22- 6 18- 6 11- 3 1- 6 2- 3 1- 3 19- 6 30- 6 28- 6 14- 6 24- 6 MIN. QFF PRESSURE IN HPA 1005.8 1005.4 1000.1 1001.0 996.7 990.5 987.7 989.9 995.6 1002.2 1005.8 1012.6 987.7 DAY-HOUR 18- 0 5-21 2- 0 7-18 19-21 24-12 12-12 7-12 10-12 8-12 1- 0 31-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 934.2 934.0 930.3 929.9 926.1 922.7 919.2 921.9 925.5 931.0 934.3 936.9 928.8 MAX. QFE PRESSURE IN HPA 937.2 936.8 934.6 933.7 931.3 928.1 923.3 927.2 930.5 933.4 938.2 939.6 939.6 DAY 12 23 19 11 1 2 1 19 30 29 15 25 MIN. QFE PRESSURE IN HPA 926.5 926.6 921.5 924.8 922.8 917.9 915.4 917.8 923.0 927.9 929.6 933.2 915.4 DAY 18 6 2 8 20 24 13 7 11 9 1 27 MEAN QNH PRESSURE IN HPA 1015.3 1015.1 1011.1 1010.7 1006.7 1003.0 999.3 1002.1 1006.0 1011.9 1015.4 1018.2 1009.6 MAX. QNH PRESSURE IN HPA 1018.5 1018.1 1015.8 1014.8 1012.2 1008.8 1003.7 1007.8 1011.4 1014.5 1019.6 1021.1 1021.1 DAY 12 23 19 11 1 2 1 19 30 29 15 25 MIN. QNH PRESSURE IN HPA 1007.1 1007.2 1001.7 1005.3 1003.1 997.9 995.2 997.8 1003.3 1008.6 1010.4 1014.3 995.2 DAY 18 6 2 8 20 24 13 7 11 9 1 27 MEAN QFF PRESSURE IN HPA 1014.7 1013.9 1009.8 1007.0 1001.3 996.6 992.5 995.0 1000.1 1007.4 1013.1 1017.1 1005.7 MAX. QFF PRESSURE IN HPA 1018.8 1017.9 1015.0 1012.9 1006.9 1002.3 997.2 1001.1 1006.3 1011.9 1017.5 1020.2 1020.2 DAY 22 22 19 11 1 2 1 19 30 28 14 25 MIN. QFF PRESSURE IN HPA 1005.8 1006.8 1000.1 1001.2 997.2 991.1 988.5 990.4 996.9 1003.5 1005.8 1013.2 988.5 DAY 18 6 2 8 20 24 13 7 11 4 1 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 934.3 934.3 930.6 930.5 926.9 923.3 919.7 922.5 926.0 931.7 934.8 937.2 929.3 MAX. QFE PRESSURE IN HPA 937.4 937.0 935.0 934.6 931.7 928.5 923.5 927.0 931.3 933.9 939.2 939.6 939.6 DAY 11 22 18 11 1 2 1 19 30 23 16 24 MIN. QFE PRESSURE IN HPA 926.7 926.1 922.8 926.0 923.2 918.1 915.8 918.5 923.4 928.6 930.6 933.6 915.8 DAY 18 6 2 8 20 24 12 7 7 9 1 27 MEAN QNH PRESSURE IN HPA 1015.4 1015.4 1011.5 1011.3 1007.5 1003.7 999.8 1002.8 1006.5 1012.6 1016.0 1018.6 1010.1 MAX. QNH PRESSURE IN HPA 1018.7 1018.3 1016.2 1015.8 1012.6 1009.2 1003.9 1007.6 1012.2 1015.0 1020.7 1021.1 1021.1 DAY 11 22 18 11 1 2 1 19 30 23 16 24 MIN. QNH PRESSURE IN HPA 1007.3 1006.7 1003.1 1006.5 1003.6 998.1 995.6 998.5 1003.8 1009.3 1011.5 1014.7 995.6 DAY 18 6 2 8 20 24 12 7 7 9 1 27 MEAN QFF PRESSURE IN HPA 1015.3 1014.8 1010.6 1008.2 1002.7 997.6 993.4 996.3 1001.4 1008.9 1014.4 1018.3 1006.8 MAX. QFF PRESSURE IN HPA 1019.7 1018.8 1016.3 1014.5 1008.0 1003.5 998.0 1001.3 1007.5 1012.9 1019.2 1021.1 1021.1 DAY 11 22 18 11 1 2 1 19 30 28 14 24 MIN. QFF PRESSURE IN HPA 1006.7 1006.2 1001.7 1003.1 998.3 992.4 989.4 991.7 998.0 1005.0 1007.2 1013.6 989.4 DAY 18 6 2 28 20 24 12 7 7 9 1 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.6 935.6 932.1 931.6 927.6 923.9 920.4 923.2 926.8 932.8 936.0 938.5 930.4 MAX. QFE PRESSURE IN HPA 938.4 938.6 936.0 935.4 932.6 929.2 924.1 928.4 932.1 935.3 940.2 941.0 941.0 DAY 11 12 18 11 1 2 8 19 30 29 15 24 MIN. QFE PRESSURE IN HPA 928.2 929.7 925.1 927.0 923.6 918.2 916.4 919.0 924.1 929.3 931.3 934.8 916.4 DAY 18 6 2 8 20 24 12 7 7 8 1 27 MEAN QNH PRESSURE IN HPA 1016.8 1016.8 1013.1 1012.6 1008.3 1004.3 1000.6 1003.6 1007.4 1013.8 1017.3 1019.9 1011.2 MAX. QNH PRESSURE IN HPA 1019.8 1020.0 1017.2 1016.6 1013.6 1010.0 1004.5 1009.1 1013.1 1016.5 1021.7 1022.6 1022.6 DAY 11 12 18 11 1 2 8 19 30 29 15 24 MIN. QNH PRESSURE IN HPA 1008.9 1010.5 1005.6 1007.6 1004.0 998.2 996.3 999.1 1004.5 1010.1 1012.2 1016.0 996.3 DAY 18 6 2 8 20 24 12 7 7 8 1 27 MEAN QFF PRESSURE IN HPA 1016.6 1016.0 1011.8 1008.9 1002.7 997.6 993.6 996.5 1001.6 1009.4 1015.2 1019.6 1007.5 MAX. QFF PRESSURE IN HPA 1020.6 1019.8 1016.5 1014.3 1008.6 1003.4 997.7 1001.9 1007.9 1013.6 1020.0 1022.6 1022.6 DAY 11 22 18 11 1 2 1 19 30 28 14 24 MIN. QFF PRESSURE IN HPA 1008.3 1009.6 1004.2 1003.9 998.0 991.7 989.3 991.6 997.8 1005.3 1008.5 1016.0 989.3 DAY 18 6 2 8 20 24 12 7 10 8 1 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 934.9 934.8 931.7 931.0 927.1 923.3 920.0 922.6 926.0 931.8 935.1 937.5 929.6 MAX. QFE PRESSURE IN HPA 938.1 937.6 935.3 934.4 932.3 928.0 923.6 927.6 931.3 934.1 939.4 940.0 940.0 DAY 11 12 18 11 1 1 1 19 30 28 15 24 MIN. QFE PRESSURE IN HPA 927.9 930.2 925.0 927.4 923.2 917.9 915.7 918.4 922.8 928.7 931.2 934.3 915.7 DAY 18 6 2 8 20 24 12 7 10 8 11 31 MEAN QNH PRESSURE IN HPA 1016.1 1016.0 1012.6 1011.9 1007.7 1003.7 1000.1 1002.9 1006.6 1012.7 1016.3 1018.9 1010.5 MAX. QNH PRESSURE IN HPA 1019.5 1019.0 1016.5 1015.5 1013.3 1008.7 1004.0 1008.3 1012.2 1015.2 1020.9 1021.5 1021.5 DAY 11 12 18 11 1 1 1 19 30 28 15 24 MIN. QNH PRESSURE IN HPA 1008.6 1011.0 1005.5 1008.0 1003.6 997.9 995.5 998.4 1003.1 1009.4 1012.1 1015.4 995.5 DAY 18 6 2 8 20 24 12 7 10 8 11 31 MEAN QFF PRESSURE IN HPA 1015.5 1014.8 1011.2 1008.1 1001.9 996.9 993.0 995.6 1000.5 1008.0 1013.9 1017.9 1006.4 MAX. QFF PRESSURE IN HPA 1019.5 1017.8 1015.7 1013.1 1008.2 1002.0 997.2 1000.9 1006.6 1012.1 1019.0 1020.8 1020.8 DAY 11 12 18 11 1 2 1 19 30 28 14 24 MIN. QFF PRESSURE IN HPA 1007.5 1009.8 1004.4 1004.0 997.4 991.2 988.4 990.8 996.4 1004.1 1008.8 1014.5 988.4 DAY 18 6 2 27 20 24 12 7 10 8 11 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 933.3 933.3 930.2 929.7 925.7 922.3 919.0 921.2 924.9 930.3 933.7 936.1 928.3 MAX. QFE PRESSURE IN HPA 936.3 937.0 933.6 932.8 930.4 927.6 922.6 926.0 930.5 934.5 937.6 939.1 939.1 DAY 11 12 18 17 1 1 8 18 30 27 14 24 MIN. QFE PRESSURE IN HPA 927.3 927.8 923.7 925.8 922.3 917.2 914.5 917.4 921.7 926.6 930.2 932.5 914.5 DAY 18 28 2 7 20 24 12 7 10 8 11 31 MEAN QNH PRESSURE IN HPA 1014.4 1014.4 1011.0 1010.5 1006.2 1002.6 999.0 1001.4 1005.3 1011.2 1014.7 1017.3 1009.0 MAX. QNH PRESSURE IN HPA 1017.6 1018.3 1014.7 1013.8 1011.3 1008.3 1002.9 1006.5 1011.4 1015.6 1019.0 1020.6 1020.6 DAY 11 12 18 17 1 1 8 18 30 27 14 24 MIN. QNH PRESSURE IN HPA 1007.9 1008.5 1004.1 1006.3 1002.6 997.1 994.2 997.3 1001.9 1007.2 1011.0 1013.5 994.2 DAY 18 28 2 7 20 24 12 7 10 8 11 31 MEAN QFF PRESSURE IN HPA 1013.8 1013.2 1009.7 1006.8 1000.8 996.2 992.2 994.3 999.7 1006.8 1012.6 1016.3 1005.2 MAX. QFF PRESSURE IN HPA 1017.6 1017.6 1014.0 1011.1 1006.1 1001.7 996.4 999.7 1006.5 1012.5 1017.4 1019.9 1019.9 DAY 11 12 18 11 1 1 1 18 30 27 14 24 MIN. QFF PRESSURE IN HPA 1007.1 1006.7 1002.8 1002.5 997.0 990.5 987.7 989.9 995.6 1002.2 1007.9 1012.6 987.7 DAY 18 28 2 7 20 24 12 7 10 8 11 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 933.8 933.6 930.3 929.4 925.4 922.0 918.7 921.2 925.0 930.6 934.1 936.6 928.4 MAX. QFE PRESSURE IN HPA 937.2 938.2 934.0 932.1 930.1 927.5 922.5 926.7 930.5 933.6 938.4 939.4 939.4 DAY 11 12 18 5 1 1 1 18 30 27 14 24 MIN. QFE PRESSURE IN HPA 928.6 927.4 925.5 924.6 922.1 916.9 914.5 917.4 921.3 926.6 930.4 932.8 914.5 DAY 18 5 2 7 19 24 12 7 10 8 11 31 MEAN QNH PRESSURE IN HPA 1014.9 1014.6 1011.1 1010.2 1005.9 1002.3 998.8 1001.4 1005.4 1011.5 1015.2 1017.9 1009.1 MAX. QNH PRESSURE IN HPA 1018.5 1019.6 1015.1 1013.1 1010.9 1008.2 1002.8 1007.3 1011.4 1014.7 1019.8 1020.9 1020.9 DAY 11 12 18 5 1 1 1 18 30 27 14 24 MIN. QNH PRESSURE IN HPA 1009.3 1008.0 1006.0 1005.1 1002.4 996.8 994.2 997.3 1001.5 1007.2 1011.3 1013.8 994.2 DAY 18 5 2 7 19 24 12 7 10 8 11 31 MEAN QFF PRESSURE IN HPA 1014.8 1013.9 1010.2 1007.0 1001.1 996.3 992.4 995.0 1000.4 1007.8 1013.7 1017.6 1005.8 MAX. QFF PRESSURE IN HPA 1019.3 1019.4 1015.2 1011.2 1006.4 1002.2 997.0 1000.9 1006.6 1011.7 1019.1 1021.1 1021.1 DAY 11 12 18 11 1 1 1 18 30 27 14 24 MIN. QFF PRESSURE IN HPA 1009.2 1007.2 1005.1 1001.7 997.1 991.3 988.0 990.5 995.7 1002.9 1008.7 1013.4 988.0 DAY 18 28 2 7 19 24 12 7 10 8 11 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 934.5 934.5 931.2 930.2 926.6 923.0 919.6 922.4 926.1 931.4 934.8 937.3 929.3 MAX. QFE PRESSURE IN HPA 938.0 938.5 935.0 934.1 931.1 928.8 922.3 927.2 931.5 934.2 939.0 940.0 940.0 DAY 11 12 18 10 1 1 1 18 30 29 14 24 MIN. QFE PRESSURE IN HPA 929.6 926.4 926.2 924.6 923.1 918.3 915.3 918.3 923.0 927.5 931.4 933.6 915.3 DAY 17 5 2 7 19 23 12 14 10 8 11 14 MEAN QNH PRESSURE IN HPA 1015.6 1015.6 1012.1 1011.0 1007.1 1003.3 999.7 1002.7 1006.7 1012.3 1016.0 1018.7 1010.1 MAX. QNH PRESSURE IN HPA 1019.4 1019.9 1016.2 1015.2 1012.0 1009.5 1002.6 1007.8 1012.4 1015.3 1020.5 1021.5 1021.5 DAY 11 12 18 10 1 1 1 18 30 29 14 24 MIN. QNH PRESSURE IN HPA 1010.4 1007.0 1006.8 1005.1 1003.4 998.3 995.1 998.3 1003.3 1008.2 1012.3 1014.7 995.1 DAY 17 5 2 7 19 23 12 14 10 8 11 14 MEAN QFF PRESSURE IN HPA 1015.4 1014.7 1010.8 1007.3 1001.5 996.6 992.6 995.5 1000.8 1007.8 1014.0 1018.2 1006.3 MAX. QFF PRESSURE IN HPA 1020.2 1019.2 1015.5 1013.1 1007.0 1002.7 996.0 1001.0 1007.2 1011.7 1019.1 1021.3 1021.3 DAY 11 12 18 10 1 1 1 18 30 28 14 24 MIN. QFF PRESSURE IN HPA 1009.7 1006.5 1005.7 1001.0 997.4 991.8 988.1 990.7 996.9 1003.3 1009.4 1013.4 988.1 DAY 17 5 1 7 19 23 12 7 10 3 11 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 934.5 934.3 931.0 930.5 926.5 922.9 919.5 922.2 925.9 931.2 934.8 937.3 929.2 MAX. QFE PRESSURE IN HPA 937.3 938.1 935.0 934.0 931.2 929.1 922.6 928.0 930.9 933.9 939.6 940.0 940.0 DAY 22 12 18 10 1 1 8 18 30 29 15 24 MIN. QFE PRESSURE IN HPA 927.3 925.8 925.0 925.4 922.8 917.9 915.9 918.1 923.0 927.3 931.0 933.9 915.9 DAY 17 5 1 7 19 23 12 6 10 8 11 31 MEAN QNH PRESSURE IN HPA 1015.6 1015.4 1011.9 1011.4 1007.1 1003.2 999.6 1002.5 1006.4 1012.1 1016.0 1018.6 1010.0 MAX. QNH PRESSURE IN HPA 1018.6 1019.5 1016.2 1015.1 1012.1 1009.9 1002.9 1008.7 1011.8 1015.0 1021.1 1021.5 1021.5 DAY 22 12 18 10 1 1 8 18 30 29 15 24 MIN. QNH PRESSURE IN HPA 1007.9 1006.3 1005.5 1005.9 1003.1 997.9 995.7 998.1 1003.3 1007.9 1011.9 1015.0 995.7 DAY 17 5 1 7 19 23 12 6 10 8 11 31 MEAN QFF PRESSURE IN HPA 1015.1 1014.2 1010.4 1007.4 1001.2 996.4 992.5 995.1 1000.3 1007.3 1013.6 1017.5 1005.9 MAX. QFF PRESSURE IN HPA 1019.5 1018.0 1015.3 1012.9 1007.1 1003.1 996.2 1001.6 1006.0 1011.4 1018.9 1020.6 1020.6 DAY 22 21 18 10 1 1 8 18 30 23 14 24 MIN. QFF PRESSURE IN HPA 1006.7 1005.4 1004.1 1001.7 996.7 991.0 988.5 990.3 996.5 1002.5 1008.8 1013.9 988.5 DAY 17 5 1 7 19 23 12 7 10 8 11 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.3 11.6 15.9 25.2 29.9 32.8 35.6 34.9 29.6 24.5 15.5 12.3 23.2 MINIMUN AIR TEMPERATURE (C) 5.4 5.2 8.3 16.5 20.4 23.1 26.8 26.8 20.6 16.6 10.5 7.5 15.6 DAYS WITH MINIMUM TEMP. >=21 0 0 1 3 16 30 31 30 9 1 0 0 121 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) 0.8 1.0 1.0 9.6 14.4 21.0 24.2 18.6 17.8 13.4 5.2 1.6 0.8 DAY 15 9 11 1 13 15 6 31 1 30 27 17 MAXIMUM AIR TEMPERATURE (C) 16.0 17.8 22.4 32.8 37.3 40.2 43.0 42.4 37.5 32.2 21.5 17.9 30.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 27 31 30 31 31 30 30 1 0 211 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.2 23.0 27.4 37.2 41.5 44.6 46.8 44.6 42.5 35.2 30.4 24.4 46.8 DAY 1 24 24 14 31 22 1 25 10 25 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 12.6 14.1 16.3 16.9 17.1 16.2 15.6 16.9 15.6 11.0 10.4 14.5 MEAN DAILY TEMP. (MDT) (C) 10.7 11.5 15.3 24.7 28.8 31.6 34.9 34.6 29.1 24.4 16.0 12.7 22.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 5.2 115.3 242.6 319.4 431.8 420.7 242.4 104.5 3.2 0.0 1885.2 HEATING DEG. DAYS(BASE 18 0C) 227.1 188.2 99.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 73.6 165.8 754.1 DEWPOINT (MEAN C) 3.3 2.3 -1.5 1.9 -0.8 1.7 5.5 9.6 3.7 3.0 7.7 6.7 3.6 MIXING RATIO (G/KG) 5.47 5.00 3.82 4.90 4.09 4.77 6.47 8.97 5.75 5.33 7.25 6.75 5.72 VAPOUR PRESSURE (HPA) 8.14 7.44 5.69 7.26 6.05 7.02 9.47 13.08 8.47 7.92 10.77 10.04 8.45 SATURATION DEF. (HPA) 4.83 6.78 13.54 26.61 38.19 45.04 50.72 44.69 35.00 24.19 7.52 4.71 25.15 RELATIVE HUMIDITY (MEAN %) 68 58 34 25 15 15 18 26 23 28 65 72 37 RELATIVE HUMIDITY (MAX. %) 90 86 58 43 27 27 31 45 38 45 86 91 56 RELATIVE HUMIDITY (MIN. %) 42 31 18 12 8 9 8 11 11 15 40 46 21 RELATIVE HUMIDITY (MEAN% 03UTC) 84 84 56 42 26 27 28 41 37 42 81 89 53 RELATIVE HUMIDITY (MEAN% 09UTC) 52 38 22 14 10 9 9 13 12 18 48 53 25 RELATIVE HUMIDITY (MEAN% 15UTC) 60 43 23 16 10 10 13 21 17 20 58 68 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 133.9 10.9 0.0 0.0 0.0 0.0 0.0 12.0 0.0 0.8 85.8 93.1 336.5 DAYS WITH PRECIPITATION >=10 5 0 0 0 0 0 0 1 0 0 4 5 15 DAYS WITH PRECIPITATION >= 5 5 1 0 0 0 0 0 1 0 0 5 6 18 DAYS WITH PRECIPITATION >= 1 9 3 0 0 0 0 0 1 0 0 5 11 29 DAYS WITH PRECIPITATION 10 5 0 0 0 0 0 1 0 1 7 15 39 GREATEST DAILY PRECIPITATION 39.2 5.0 0.0 0.0 0.0 0.0 0.0 12.0 0.0 0.8 29.0 29.7 39.2 DAY 29 14 ** ** ** ** ** 7 ** 3 9 9 DAY WITH THUNDER STORM 2 0 0 0 0 0 0 0 0 2 3 7 14 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 0 0 0 0 1 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 135 270 270 270 270 270 270 270 270 270 270 135 270 PREVAILING WIND SPEED(KNOTS) 10.0 8.6 10.1 9.8 10.1 9.5 10.2 10.2 10.2 8.6 6.6 8.3 9.6 PREVAILING WIND PERCENT 16.9 14.7 16.9 24.2 40.3 36.3 26.6 26.2 34.2 25.0 9.2 12.1 22.6 CALMS PERCENT OF WIND 61.3 66.4 56.9 65.0 54.0 59.6 56.9 59.7 60.4 64.1 75.0 74.2 62.7 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 173 258 253 266 275 267 255 256 268 269 136 122 258 VECTOR WIND MAGNITUDE(KNOTS) 1.4 1.4 1.4 2.4 4.4 3.4 1.9 1.9 3.3 1.7 0.6 1.3 1.7 WIND STEADINESES (MEAN %) 37.8 46.7 34.1 70.6 93.6 89.5 43.2 47.5 84.6 56.7 28.6 59.1 48.6 WIND SPEED (MEAN KNOTS) 3.7 3.0 4.1 3.4 4.7 3.8 4.4 4.0 3.9 3.0 2.1 2.2 3.5 FASTEST WIND DIRECTION 90 270 280 270 290 290 90 90 280 260 130 90 90 FASTEST WIND SPEED (KNOTS) 23 17 23 23 19 19 23 23 19 19 23 23 23 DAY 16 20 15 26 17 1 31 5 16 1 17 10 DAYS WITH SKY CLEAR (0-2)/8 16 22 24 18 28 30 28 25 30 25 11 15 272 DAYS WITH P.CLOUDY (3-6)/8 6 3 2 12 2 0 2 5 0 5 14 9 60 DAYS WITH CLOUDY (7-8)/8 9 4 5 0 1 0 1 1 0 1 5 7 34 DAYS WITH VISIBILITY =< 2 KM 4 2 1 0 0 5 8 0 0 0 6 3 29 DURATION OF SUNSHINE HOURS 188.4 233.4 265.5 258.8 349.1 341.9 315.6 319.5 311.7 291.5 193.2 192.8 3261.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.4 934.0 932.4 929.8 926.5 922.0 920.6 922.3 926.3 931.9 935.3 935.9 929.3 MAX. QFE PRESSURE IN HPA 941.5 939.2 936.4 935.0 931.4 926.2 926.2 926.7 933.1 936.5 940.3 942.2 942.2 DAY-HOUR 30- 6 11- 6 3- 6 2- 6 7- 6 17- 6 30- 6 13-21 29- 6 29- 6 27- 6 17- 6 MIN. QFE PRESSURE IN HPA 927.8 927.8 927.7 925.2 921.7 919.0 914.8 917.8 919.2 927.4 929.6 926.1 914.8 DAY-HOUR 28-12 7- 0 24- 0 21-12 27-15 7- 0 10-12 11-12 1-12 1-15 6-12 10-21 MEAN QNH PRESSURE IN HPA 1015.5 1015.1 1013.4 1010.6 1007.0 1002.2 1000.7 1002.5 1006.9 1012.9 1016.5 1017.2 1010.0 MAX. QNH PRESSURE IN HPA 1023.1 1020.7 1017.7 1016.2 1012.3 1006.8 1006.8 1007.3 1014.1 1017.8 1021.9 1023.9 1023.9 DAY-HOUR 30- 6 11- 6 3- 6 2- 6 7- 6 17- 6 30- 6 13-21 29- 6 29- 6 27- 6 17- 6 MIN. QNH PRESSURE IN HPA 1008.5 1008.5 1008.4 1005.7 1001.9 999.1 994.6 997.8 999.3 1008.0 1010.4 1006.7 994.6 DAY-HOUR 28-12 7- 0 24- 0 21-12 27-15 7- 0 10-12 11-12 1-12 1-15 6-12 10-21 MEAN QFF PRESSURE IN HPA 1015.5 1014.8 1011.8 1006.4 1001.6 996.0 993.7 995.6 1001.4 1008.8 1014.9 1016.5 1006.4 MAX. QFF PRESSURE IN HPA 1024.3 1021.4 1017.6 1013.5 1007.9 1000.8 999.6 1000.7 1008.9 1014.2 1021.4 1025.1 1025.1 DAY-HOUR 30- 6 4- 6 3-18 1- 6 3- 3 17- 3 30- 6 14- 3 29- 6 30- 6 27- 6 17- 6 MIN. QFF PRESSURE IN HPA 1007.0 1007.3 1004.1 1000.6 996.2 992.1 987.1 991.0 993.7 1003.2 1006.9 1005.0 987.1 DAY-HOUR 28-12 7- 0 24- 0 21-12 30-21 30-21 9-21 11-12 1-12 1- 0 1-12 10-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 934.0 933.7 932.1 929.4 926.2 921.8 920.3 921.9 925.7 931.5 934.9 935.6 928.9 MAX. QFE PRESSURE IN HPA 939.5 937.9 935.6 934.5 930.1 925.0 924.9 925.9 930.6 934.6 938.1 940.4 940.4 DAY 30 11 1 2 3 17 31 14 30 29 12 18 MIN. QFE PRESSURE IN HPA 929.0 927.8 927.7 925.7 922.3 919.0 914.9 918.6 919.8 927.7 930.1 928.9 914.9 DAY 28 7 24 21 28 7 10 11 2 1 7 15 MEAN QNH PRESSURE IN HPA 1015.1 1014.8 1013.1 1010.2 1006.7 1002.1 1000.4 1002.2 1006.2 1012.4 1016.1 1016.8 1009.7 MAX. QNH PRESSURE IN HPA 1021.0 1019.3 1016.8 1015.6 1010.9 1005.5 1005.4 1006.4 1011.5 1015.8 1019.5 1022.0 1022.0 DAY 30 11 1 2 3 17 31 14 30 29 12 18 MIN. QNH PRESSURE IN HPA 1009.8 1008.5 1008.4 1006.2 1002.6 999.1 994.7 998.6 999.9 1008.4 1010.9 1009.7 994.7 DAY 28 7 24 21 28 7 10 11 2 1 7 15 MEAN QFF PRESSURE IN HPA 1014.8 1014.2 1011.4 1005.9 1001.3 995.8 993.3 995.1 1000.6 1008.2 1014.3 1015.9 1005.9 MAX. QFF PRESSURE IN HPA 1022.0 1019.7 1016.2 1013.1 1007.0 999.5 998.2 999.4 1006.5 1012.1 1018.8 1022.5 1022.5 DAY 31 11 4 2 3 17 31 14 29 30 26 18 MIN. QFF PRESSURE IN HPA 1008.3 1007.3 1004.1 1001.3 996.5 992.9 987.2 991.5 994.4 1003.2 1008.3 1009.4 987.2 DAY 28 7 24 21 29 23 10 11 2 1 1 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 934.2 934.0 932.5 930.0 926.8 922.3 921.1 922.7 926.4 932.0 935.1 935.8 929.4 MAX. QFE PRESSURE IN HPA 940.1 938.0 935.6 934.0 930.5 925.3 925.4 926.5 931.2 935.0 938.9 940.6 940.6 DAY 31 11 1 2 2 17 30 14 29 29 27 18 MIN. QFE PRESSURE IN HPA 928.4 927.8 927.8 926.2 923.1 920.2 915.9 919.0 920.4 928.0 930.8 929.3 915.9 DAY 17 7 24 21 30 6 10 11 2 1 7 15 MEAN QNH PRESSURE IN HPA 1015.3 1015.2 1013.5 1010.8 1007.4 1002.6 1001.3 1003.0 1007.0 1013.0 1016.2 1017.0 1010.2 MAX. QNH PRESSURE IN HPA 1021.6 1019.4 1016.8 1015.1 1011.4 1005.8 1005.9 1007.1 1012.1 1016.2 1020.4 1022.2 1022.2 DAY 31 11 1 2 2 17 30 14 29 29 27 18 MIN. QNH PRESSURE IN HPA 1009.1 1008.5 1008.5 1006.8 1003.4 1000.3 995.7 999.1 1000.6 1008.7 1011.7 1010.1 995.7 DAY 17 7 24 21 30 6 10 11 2 1 7 15 MEAN QFF PRESSURE IN HPA 1015.6 1015.2 1012.4 1007.2 1002.5 996.9 994.7 996.5 1002.1 1009.5 1015.0 1016.7 1007.0 MAX. QFF PRESSURE IN HPA 1023.2 1020.3 1016.8 1013.4 1007.9 1000.8 999.3 1000.7 1007.7 1013.6 1020.6 1023.1 1023.2 DAY 31 11 1 2 3 17 30 14 29 30 27 18 MIN. QFF PRESSURE IN HPA 1009.7 1007.6 1004.4 1001.7 998.5 994.3 988.9 992.2 995.8 1004.1 1009.3 1009.8 988.9 DAY 28 7 24 21 30 23 10 11 2 1 2 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.5 935.2 933.6 931.2 927.6 923.0 921.6 923.4 927.5 933.3 936.4 937.3 930.5 MAX. QFE PRESSURE IN HPA 941.5 939.2 936.4 935.0 931.4 926.2 926.2 926.5 933.1 936.5 940.3 942.2 942.2 DAY 30 11 3 2 7 17 30 14 29 29 27 17 MIN. QFE PRESSURE IN HPA 929.6 929.4 929.6 928.4 923.8 920.4 916.2 919.8 920.9 928.6 932.3 931.0 916.2 DAY 28 7 24 21 30 6 10 11 1 1 7 15 MEAN QNH PRESSURE IN HPA 1016.8 1016.4 1014.7 1012.1 1008.3 1003.3 1001.8 1003.7 1008.2 1014.4 1017.7 1018.6 1011.3 MAX. QNH PRESSURE IN HPA 1023.1 1020.7 1017.7 1016.2 1012.3 1006.8 1006.8 1007.1 1014.1 1017.8 1021.9 1023.9 1023.9 DAY 30 11 3 2 7 17 30 14 29 29 27 17 MIN. QNH PRESSURE IN HPA 1010.4 1010.2 1010.4 1009.1 1004.2 1000.6 996.1 999.9 1001.1 1009.3 1013.3 1011.9 996.1 DAY 28 7 24 21 30 6 10 11 1 1 7 15 MEAN QFF PRESSURE IN HPA 1016.9 1016.1 1013.1 1007.7 1002.6 996.8 994.6 996.7 1002.6 1010.3 1016.1 1018.1 1007.6 MAX. QFF PRESSURE IN HPA 1024.3 1021.4 1017.6 1013.5 1007.7 1000.8 999.6 1000.5 1008.9 1014.2 1021.4 1025.1 1025.1 DAY 30 4 3 1 3 17 30 14 29 30 27 17 MIN. QFF PRESSURE IN HPA 1009.0 1009.5 1006.6 1003.9 997.9 993.4 988.6 992.7 995.5 1004.2 1009.7 1011.1 988.6 DAY 28 7 24 21 30 23 10 11 1 1 1 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 934.8 934.7 933.0 930.5 927.0 922.4 921.0 922.7 926.9 932.4 935.7 936.3 929.8 MAX. QFE PRESSURE IN HPA 941.5 938.6 936.3 934.4 930.6 925.5 925.4 925.7 932.1 935.3 939.5 941.3 941.5 DAY 30 4 3 1 2 17 30 14 29 29 30 17 MIN. QFE PRESSURE IN HPA 930.0 929.0 929.8 927.2 923.4 920.0 915.8 918.8 920.1 928.1 931.3 930.8 915.8 DAY 28 7 24 21 30 6 10 11 1 1 6 11 MEAN QNH PRESSURE IN HPA 1015.9 1015.8 1014.1 1011.3 1007.6 1002.7 1001.2 1003.0 1007.5 1013.4 1017.0 1017.6 1010.6 MAX. QNH PRESSURE IN HPA 1023.1 1020.0 1017.6 1015.5 1011.5 1006.0 1005.9 1006.2 1013.1 1016.5 1021.0 1022.9 1023.1 DAY 30 4 3 1 2 17 30 14 29 29 30 17 MIN. QNH PRESSURE IN HPA 1010.8 1009.8 1010.6 1007.8 1003.8 1000.1 995.6 998.8 1000.2 1008.8 1012.2 1011.7 995.6 DAY 28 7 24 21 30 6 10 11 1 1 6 11 MEAN QFF PRESSURE IN HPA 1015.7 1015.2 1012.1 1006.8 1001.8 996.1 993.9 995.7 1001.6 1009.0 1015.0 1016.7 1006.6 MAX. QFF PRESSURE IN HPA 1023.9 1020.5 1017.6 1012.7 1006.5 1000.1 998.6 999.0 1007.7 1012.6 1019.5 1023.3 1023.9 DAY 30 4 3 1 2 16 30 14 29 29 27 17 MIN. QFF PRESSURE IN HPA 1009.6 1009.3 1006.5 1002.5 997.5 992.7 988.0 991.3 994.2 1003.3 1008.0 1009.9 988.0 DAY 28 7 24 21 30 23 10 11 1 1 1 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 933.3 933.1 931.5 928.9 925.8 921.4 919.7 921.5 925.6 931.0 934.5 935.1 928.5 MAX. QFE PRESSURE IN HPA 939.4 936.8 934.8 932.8 929.4 924.1 924.1 924.7 930.4 933.8 938.6 940.1 940.1 DAY 30 10 3 1 10 16 30 13 29 29 30 17 MIN. QFE PRESSURE IN HPA 927.8 928.2 928.0 925.2 922.3 919.1 914.8 917.8 919.2 927.5 929.6 930.5 914.8 DAY 28 7 18 21 27 6 10 11 1 1 6 10 MEAN QNH PRESSURE IN HPA 1014.4 1014.1 1012.4 1009.7 1006.4 1001.6 999.8 1001.7 1006.1 1011.9 1015.6 1016.3 1009.2 MAX. QNH PRESSURE IN HPA 1020.9 1018.1 1016.0 1013.8 1010.2 1004.5 1004.5 1005.2 1011.3 1014.9 1020.0 1021.6 1021.6 DAY 30 10 3 1 10 16 30 13 29 29 30 17 MIN. QNH PRESSURE IN HPA 1008.5 1008.9 1008.7 1005.7 1002.6 999.2 994.6 997.8 999.3 1008.2 1010.4 1011.4 994.6 DAY 28 7 18 21 27 6 10 11 1 1 6 10 MEAN QFF PRESSURE IN HPA 1014.2 1013.6 1010.8 1005.5 1000.9 995.3 992.8 994.8 1000.5 1007.7 1013.9 1015.5 1005.5 MAX. QFF PRESSURE IN HPA 1021.6 1018.5 1015.8 1011.6 1005.5 998.9 997.5 998.2 1006.2 1011.4 1018.2 1022.3 1022.3 DAY 30 10 3 1 3 16 30 13 29 29 27 17 MIN. QFF PRESSURE IN HPA 1007.0 1008.4 1005.5 1000.6 996.6 992.4 987.2 991.0 993.7 1003.3 1006.9 1010.2 987.2 DAY 28 7 18 21 28 23 10 11 1 1 1 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 933.9 933.2 931.6 928.9 925.5 921.0 919.6 921.3 925.6 931.3 934.9 935.6 928.5 MAX. QFE PRESSURE IN HPA 940.0 936.9 935.2 932.8 929.6 923.8 923.5 924.7 930.2 934.1 939.0 940.7 940.7 DAY 30 11 3 1 2 16 30 13 29 29 30 17 MIN. QFE PRESSURE IN HPA 928.9 928.8 927.9 925.4 921.7 919.2 915.0 918.4 919.2 927.4 929.7 929.7 915.0 DAY 28 6 23 21 27 6 10 11 1 1 6 10 MEAN QNH PRESSURE IN HPA 1015.0 1014.3 1012.5 1009.6 1006.0 1001.2 999.7 1001.5 1006.1 1012.2 1016.1 1016.8 1009.2 MAX. QNH PRESSURE IN HPA 1021.5 1018.2 1016.4 1013.8 1010.4 1004.2 1003.9 1005.2 1011.0 1015.2 1020.5 1022.3 1022.3 DAY 30 11 3 1 2 16 30 13 29 29 30 17 MIN. QNH PRESSURE IN HPA 1009.7 1009.5 1008.6 1005.9 1001.9 999.3 994.8 998.4 999.3 1008.0 1010.5 1010.5 994.8 DAY 28 6 23 21 27 6 10 11 1 1 6 10 MEAN QFF PRESSURE IN HPA 1015.3 1014.3 1011.5 1005.9 1001.2 995.6 993.1 995.1 1001.3 1008.7 1014.9 1016.5 1006.1 MAX. QFF PRESSURE IN HPA 1023.1 1019.1 1016.8 1012.2 1006.3 999.1 997.2 999.2 1006.4 1012.7 1019.2 1023.2 1023.2 DAY 30 10 3 1 2 16 30 7 29 30 25 17 MIN. QFF PRESSURE IN HPA 1008.5 1009.0 1004.4 1001.0 996.5 993.0 988.1 991.7 994.7 1003.8 1008.6 1009.1 988.1 DAY 28 27 24 21 27 30 10 11 1 1 1 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 934.8 934.2 932.5 929.7 926.4 922.0 920.6 922.4 926.6 932.2 935.6 936.2 929.4 MAX. QFE PRESSURE IN HPA 941.0 938.2 936.3 933.8 930.4 925.6 925.0 926.4 931.4 934.9 939.0 941.2 941.2 DAY 30 10 3 1 2 17 30 13 29 29 30 17 MIN. QFE PRESSURE IN HPA 930.9 929.3 928.0 927.0 922.4 919.7 915.5 919.4 920.0 928.1 930.6 929.4 915.5 DAY 28 6 23 21 30 23 9 10 1 1 6 10 MEAN QNH PRESSURE IN HPA 1016.0 1015.3 1013.5 1010.5 1007.0 1002.3 1000.8 1002.7 1007.2 1013.2 1016.8 1017.5 1010.2 MAX. QNH PRESSURE IN HPA 1022.6 1019.6 1017.6 1014.9 1011.3 1006.1 1005.5 1007.0 1012.3 1016.1 1020.5 1022.8 1022.8 DAY 30 10 3 1 2 17 30 13 29 29 30 17 MIN. QNH PRESSURE IN HPA 1011.8 1010.1 1008.7 1007.6 1002.7 999.8 995.3 999.5 1000.1 1008.8 1011.5 1010.2 995.3 DAY 28 6 23 21 30 23 9 10 1 1 6 10 MEAN QFF PRESSURE IN HPA 1016.2 1015.0 1011.8 1006.1 1001.3 995.8 993.5 995.7 1001.6 1009.0 1015.3 1017.0 1006.5 MAX. QFF PRESSURE IN HPA 1023.9 1020.2 1017.6 1012.3 1006.6 999.9 998.1 1000.0 1006.9 1012.3 1019.8 1024.0 1024.0 DAY 30 10 3 1 2 17 30 13 29 29 26 17 MIN. QFF PRESSURE IN HPA 1010.4 1009.6 1004.9 1002.3 996.3 992.4 987.7 992.1 994.5 1003.9 1009.0 1008.8 987.7 DAY 28 27 24 14 30 23 9 11 1 1 1 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 934.6 934.2 932.3 929.8 926.5 922.0 920.8 922.4 926.5 931.9 935.5 935.7 929.3 MAX. QFE PRESSURE IN HPA 940.4 938.2 936.3 934.5 931.0 925.3 925.5 926.7 931.4 934.6 938.8 940.5 940.5 DAY 30 10 3 1 2 16 30 13 29 28 26 17 MIN. QFE PRESSURE IN HPA 930.8 928.6 928.4 927.0 922.4 919.8 915.2 919.4 920.3 928.1 930.0 926.1 915.2 DAY 20 6 23 20 30 6 9 10 1 1 6 10 MEAN QNH PRESSURE IN HPA 1015.8 1015.3 1013.3 1010.6 1007.0 1002.3 1000.9 1002.7 1007.1 1012.9 1016.7 1016.9 1010.1 MAX. QNH PRESSURE IN HPA 1022.0 1019.6 1017.6 1015.6 1011.9 1005.8 1006.0 1007.3 1012.3 1015.8 1020.2 1022.1 1022.1 DAY 30 10 3 1 2 16 30 13 29 28 26 17 MIN. QNH PRESSURE IN HPA 1011.7 1009.3 1009.1 1007.6 1002.7 999.9 995.0 999.5 1000.5 1008.8 1010.8 1006.7 995.0 DAY 20 6 23 20 30 6 9 10 1 1 6 10 MEAN QFF PRESSURE IN HPA 1015.5 1014.6 1011.3 1005.9 1001.2 995.7 993.5 995.3 1001.2 1008.4 1014.8 1016.0 1006.1 MAX. QFF PRESSURE IN HPA 1023.0 1019.8 1017.6 1012.7 1007.2 999.7 998.5 1000.0 1006.6 1011.8 1019.4 1022.5 1023.0 DAY 30 10 3 1 2 16 30 13 29 29 26 17 MIN. QFF PRESSURE IN HPA 1010.4 1008.3 1005.0 1002.5 996.2 992.1 987.1 991.4 994.3 1003.9 1008.6 1005.0 987.1 DAY 27 6 23 20 30 30 9 11 1 1 1 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.7 11.7 17.0 23.8 29.9 33.2 34.6 34.7 30.6 25.8 16.5 13.8 23.4 MINIMUN AIR TEMPERATURE (C) 4.1 4.7 8.8 14.6 20.7 23.1 25.6 26.3 21.8 17.5 9.6 9.9 15.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 13 27 31 31 20 0 0 0 124 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 2 0 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS LOWEST(C) -1.2 0.8 5.6 9.2 16.4 19.2 23.4 24.0 19.8 15.6 2.8 4.0 -1.2 DAY 28 23 27 14 7 10 2 20 27 3 20 3 MAXIMUM AIR TEMPERATURE (C) 16.7 18.9 24.8 31.8 36.9 40.8 41.7 42.2 38.2 33.9 24.4 18.7 30.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 25 30 30 31 31 30 31 4 0 213 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.4 26.4 30.8 36.0 42.2 45.4 44.8 45.4 41.2 38.0 32.8 23.4 45.4 DAY 2 28 31 25 16 22 24 22 1 1 5 9 DIF. BETWEEN (MAX.-MIN.) (C) 12.6 14.2 16.0 17.2 16.2 17.7 16.1 15.9 16.4 16.4 14.8 8.8 15.2 MEAN DAILY TEMP. (MDT) (C) 10.4 11.8 16.8 23.2 28.8 32.0 33.6 34.2 30.0 25.7 17.0 14.3 23.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.5 72.1 242.4 329.4 392.1 409.9 269.6 146.4 0.7 0.0 1863.2 HEATING DEG. DAYS(BASE 18 0C) 235.5 172.5 45.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 51.9 115.3 620.9 DEWPOINT (MEAN C) 4.0 1.5 4.3 1.7 1.3 1.9 4.3 10.5 5.7 4.4 2.1 10.1 4.3 MIXING RATIO (G/KG) 5.55 4.68 5.81 4.77 4.78 4.87 5.79 9.60 6.60 5.92 5.02 8.40 5.98 VAPOUR PRESSURE (HPA) 8.27 6.98 8.62 7.08 7.05 7.15 8.48 13.98 9.72 8.78 7.49 12.49 8.84 SATURATION DEF. (HPA) 4.23 7.44 11.90 24.05 37.24 46.11 48.71 43.42 36.18 26.07 12.55 3.56 25.12 RELATIVE HUMIDITY (MEAN %) 72 55 49 27 19 15 17 28 24 29 44 80 38 RELATIVE HUMIDITY (MAX. %) 93 82 77 46 33 27 29 47 41 48 68 94 57 RELATIVE HUMIDITY (MIN. %) 41 27 24 12 10 8 9 12 10 14 22 59 21 RELATIVE HUMIDITY (MEAN% 03UTC) 91 78 75 45 30 27 28 43 39 42 63 90 54 RELATIVE HUMIDITY (MEAN% 09UTC) 51 37 30 15 12 9 10 14 13 15 30 65 25 RELATIVE HUMIDITY (MEAN% 15UTC) 62 39 32 18 12 10 12 23 18 22 35 80 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.4 5.1 25.2 0.0 3.5 0.0 0.0 11.2 0.0 0.0 26.8 420.8 538.0 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 1 0 0 1 9 12 DAYS WITH PRECIPITATION >= 5 3 0 3 0 0 0 0 1 0 0 3 12 22 DAYS WITH PRECIPITATION >= 1 6 2 5 0 1 0 0 1 0 0 5 13 33 DAYS WITH PRECIPITATION 8 3 5 0 3 0 0 2 0 0 8 15 44 GREATEST DAILY PRECIPITATION 19.0 2.1 9.8 0.0 3.0 0.0 0.0 11.0 0.0 0.0 10.0 79.0 79.0 DAY 4 15 26 ** 2 ** ** 11 ** ** 23 5 DAY WITH THUNDER STORM 4 0 3 0 1 0 0 2 0 0 5 11 26 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 135 270 270 270 270 270 270 270 270 270 135 135 270 PREVAILING WIND SPEED(KNOTS) 7.1 8.4 8.5 10.0 11.3 11.1 9.8 11.1 12.0 9.1 10.5 8.9 10.3 PREVAILING WIND PERCENT 8.1 12.9 19.4 36.3 32.3 38.3 33.5 31.5 27.9 22.2 10.8 15.3 22.5 CALMS PERCENT OF WIND 78.2 65.2 61.7 51.7 49.6 53.8 57.7 54.8 63.8 71.8 76.3 70.6 62.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 132 185 243 261 260 263 265 262 272 264 171 146 254 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.7 1.0 3.2 3.3 3.8 2.8 3.0 3.6 2.0 0.9 1.6 1.8 WIND STEADINESES (MEAN %) 50.0 26.9 32.3 69.6 57.9 76.0 68.3 60.0 87.8 83.3 40.9 61.5 50.0 WIND SPEED (MEAN KNOTS) 1.4 2.6 3.1 4.6 5.7 5.0 4.1 5.0 4.1 2.4 2.2 2.6 3.6 FASTEST WIND DIRECTION 120 290 120 280 150 250 270 30 290 270 130 60 30 FASTEST WIND SPEED (KNOTS) 17 17 29 19 27 19 17 39 23 19 17 21 39 DAY 4 11 25 20 11 18 20 11 1 7 12 1 DAYS WITH SKY CLEAR (0-2)/8 19 17 20 18 22 29 29 28 30 25 21 10 268 DAYS WITH P.CLOUDY (3-6)/8 6 5 6 8 4 1 2 3 0 6 6 7 54 DAYS WITH CLOUDY (7-8)/8 6 6 5 4 5 0 0 0 0 0 3 14 43 DAYS WITH VISIBILITY =< 2 KM 13 1 1 0 0 0 0 0 0 0 0 9 24 DURATION OF SUNSHINE HOURS 221.8 214.6 271.6 284.4 300.8 367.1 366.0 338.0 319.1 301.8 237.1 141.6 3363.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.4 934.0 931.8 930.3 925.9 920.8 920.1 923.3 927.5 931.9 935.4 937.2 929.5 MAX. QFE PRESSURE IN HPA 940.8 939.0 939.3 936.7 933.1 925.8 924.1 927.2 933.5 936.6 940.9 942.8 942.8 DAY-HOUR 30- 6 10- 9 1- 6 1- 6 11- 6 1- 6 28- 6 15- 6 23- 6 24- 6 21- 6 28- 6 MIN. QFE PRESSURE IN HPA 931.0 926.6 923.0 926.2 919.9 917.3 916.6 919.4 922.5 927.0 928.6 929.9 916.6 DAY-HOUR 19-15 21-12 25- 3 26- 0 25-15 11-15 4-15 3-15 2-12 3-12 18-12 5-12 MEAN QNH PRESSURE IN HPA 1016.6 1015.1 1012.8 1011.2 1006.4 1000.9 1000.2 1003.7 1008.2 1012.9 1016.6 1018.6 1010.3 MAX. QNH PRESSURE IN HPA 1022.4 1020.5 1020.8 1018.0 1014.1 1006.3 1004.5 1007.8 1014.6 1017.9 1022.5 1024.5 1024.5 DAY-HOUR 30- 6 10- 9 1- 6 1- 6 11- 6 1- 6 28- 6 15- 6 23- 6 24- 6 21- 6 28- 6 MIN. QNH PRESSURE IN HPA 1011.9 1007.2 1003.3 1006.8 1000.0 997.2 996.5 999.5 1002.8 1007.6 1009.3 1010.7 996.5 DAY-HOUR 19-15 21-12 25- 3 26- 0 25-15 11-15 4-15 3-15 2-12 3-12 18-12 5-12 MEAN QFF PRESSURE IN HPA 1016.8 1014.8 1010.8 1007.3 1000.9 994.6 993.4 996.7 1002.4 1008.4 1014.8 1017.5 1006.5 MAX. QFF PRESSURE IN HPA 1023.5 1019.7 1019.1 1014.3 1009.4 1000.1 997.1 1001.1 1009.6 1013.6 1022.6 1024.0 1024.0 DAY-HOUR 30- 6 1- 6 1- 6 1- 6 11- 6 1- 6 28- 6 15- 3 23- 3 24- 6 21- 6 28- 6 MIN. QFF PRESSURE IN HPA 1011.1 1005.7 1000.3 1001.1 994.7 991.5 990.3 992.9 996.1 1002.3 1006.9 1009.6 990.3 DAY-HOUR 20- 0 21-12 25- 3 26- 0 25-18 16-18 12-12 3-15 2-12 1- 0 18-12 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 935.1 933.9 931.7 929.9 925.5 920.5 919.8 922.9 926.9 931.3 935.0 936.8 929.1 MAX. QFE PRESSURE IN HPA 939.5 937.0 937.8 934.6 928.6 924.7 922.9 926.1 932.0 935.0 940.2 940.9 940.9 DAY 30 16 1 1 5 1 28 10 23 24 21 23 MIN. QFE PRESSURE IN HPA 931.2 928.7 925.0 926.2 921.0 918.0 917.7 920.5 923.3 927.1 929.3 931.2 917.7 DAY 20 21 25 26 26 12 10 24 1 1 18 5 MEAN QNH PRESSURE IN HPA 1016.3 1015.0 1012.7 1010.7 1006.0 1000.7 999.9 1003.2 1007.5 1012.2 1016.2 1018.1 1009.9 MAX. QNH PRESSURE IN HPA 1021.0 1018.3 1019.2 1015.8 1009.3 1005.2 1003.2 1006.7 1013.0 1016.2 1021.7 1022.5 1022.5 DAY 30 16 1 1 5 1 28 10 23 24 21 23 MIN. QNH PRESSURE IN HPA 1012.1 1009.4 1005.5 1006.8 1001.2 998.0 997.7 1000.7 1003.7 1007.7 1010.1 1012.1 997.7 DAY 20 21 25 26 26 12 10 24 1 1 18 5 MEAN QFF PRESSURE IN HPA 1016.2 1014.4 1010.5 1006.8 1000.6 994.4 993.1 996.1 1001.6 1007.6 1014.1 1016.8 1006.0 MAX. QFF PRESSURE IN HPA 1022.0 1018.1 1017.1 1012.2 1005.4 999.0 996.0 999.3 1007.7 1012.0 1021.0 1021.9 1022.0 DAY 30 16 2 1 5 1 15 10 23 24 21 22 MIN. QFF PRESSURE IN HPA 1011.1 1007.3 1002.5 1001.1 995.2 991.8 991.0 993.5 996.4 1002.3 1007.4 1010.7 991.0 DAY 20 21 25 26 29 17 10 24 1 1 18 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 935.3 934.0 931.9 930.4 926.2 921.1 920.5 923.7 927.7 932.0 935.5 937.2 929.6 MAX. QFE PRESSURE IN HPA 939.6 937.0 938.1 935.3 930.6 925.0 923.8 926.8 933.1 935.0 939.8 940.9 940.9 DAY 30 1 1 1 11 1 28 15 23 24 21 23 MIN. QFE PRESSURE IN HPA 931.8 927.9 923.0 926.3 921.9 918.4 918.0 921.1 923.6 927.5 929.3 931.0 918.0 DAY 20 21 25 26 28 16 4 24 1 1 18 5 MEAN QNH PRESSURE IN HPA 1016.5 1015.1 1012.9 1011.3 1006.7 1001.4 1000.6 1004.1 1008.3 1012.9 1016.7 1018.5 1010.4 MAX. QNH PRESSURE IN HPA 1021.1 1018.3 1019.5 1016.5 1011.5 1005.5 1004.2 1007.4 1014.1 1016.2 1021.3 1022.5 1022.5 DAY 30 1 1 1 11 1 28 15 23 24 21 23 MIN. QNH PRESSURE IN HPA 1012.8 1008.6 1003.3 1006.9 1002.2 998.4 998.0 1001.3 1004.0 1008.2 1010.1 1011.9 998.0 DAY 20 21 25 26 28 16 4 24 1 1 18 5 MEAN QFF PRESSURE IN HPA 1017.1 1015.2 1011.4 1008.0 1001.7 995.6 994.4 997.7 1003.2 1009.1 1015.4 1017.7 1007.2 MAX. QFF PRESSURE IN HPA 1022.8 1019.5 1018.7 1013.5 1006.0 999.6 996.8 1001.1 1009.6 1012.6 1021.6 1022.8 1022.8 DAY 30 1 1 1 11 1 15 15 23 24 21 23 MIN. QFF PRESSURE IN HPA 1012.2 1007.0 1000.3 1001.9 996.4 992.5 991.8 994.5 997.3 1003.4 1008.1 1010.7 991.8 DAY 20 21 25 26 29 16 5 4 1 1 18 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.5 935.2 933.1 931.5 927.0 921.7 921.0 924.5 928.7 933.3 936.7 938.6 930.7 MAX. QFE PRESSURE IN HPA 940.8 938.4 939.3 936.7 933.1 925.8 924.1 927.2 933.5 936.6 940.9 942.8 942.8 DAY 30 28 1 1 11 1 28 15 23 24 21 28 MIN. QFE PRESSURE IN HPA 932.8 927.8 925.3 927.2 922.2 919.2 918.4 921.1 924.3 929.1 930.9 932.2 918.4 DAY 26 21 25 26 29 16 12 24 2 3 18 5 MEAN QNH PRESSURE IN HPA 1017.8 1016.4 1014.1 1012.4 1007.6 1002.0 1001.2 1005.0 1009.4 1014.4 1018.0 1020.1 1011.5 MAX. QNH PRESSURE IN HPA 1022.4 1019.8 1020.8 1018.0 1014.1 1006.3 1004.5 1007.8 1014.6 1017.9 1022.5 1024.5 1024.5 DAY 30 28 1 1 11 1 28 15 23 24 21 28 MIN. QNH PRESSURE IN HPA 1013.8 1008.5 1005.8 1007.8 1002.5 999.3 998.4 1001.3 1004.7 1009.9 1011.8 1013.2 998.4 DAY 26 21 25 26 29 16 12 24 2 3 18 5 MEAN QFF PRESSURE IN HPA 1018.2 1016.2 1012.1 1008.5 1001.9 995.3 994.2 997.9 1003.6 1009.9 1016.3 1019.1 1007.8 MAX. QFF PRESSURE IN HPA 1023.5 1019.7 1019.1 1014.3 1009.4 1000.1 997.1 1000.6 1009.1 1013.6 1022.6 1024.0 1024.0 DAY 30 1 1 1 11 1 28 15 22 24 21 28 MIN. QFF PRESSURE IN HPA 1013.6 1007.2 1003.8 1002.5 995.8 992.6 991.4 994.1 998.2 1004.6 1009.8 1011.7 991.4 DAY 20 21 25 26 29 16 4 24 2 1 18 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 935.9 934.7 932.5 931.0 926.4 921.1 920.5 923.9 928.1 932.5 935.8 937.6 930.0 MAX. QFE PRESSURE IN HPA 939.9 939.0 938.6 936.4 930.9 925.1 923.5 926.1 933.1 935.4 939.8 941.6 941.6 DAY 30 10 1 1 11 1 28 15 22 28 20 28 MIN. QFE PRESSURE IN HPA 932.5 928.1 925.3 927.2 921.7 918.5 917.7 920.3 924.0 928.2 930.7 930.8 917.7 DAY 19 21 25 26 29 16 12 24 2 3 12 5 MEAN QNH PRESSURE IN HPA 1017.2 1015.8 1013.5 1011.9 1007.0 1001.3 1000.6 1004.3 1008.8 1013.5 1017.0 1019.0 1010.8 MAX. QNH PRESSURE IN HPA 1021.4 1020.5 1020.0 1017.7 1011.8 1005.6 1003.9 1006.7 1014.1 1016.6 1021.3 1023.2 1023.2 DAY 30 10 1 1 11 1 28 15 22 28 20 28 MIN. QNH PRESSURE IN HPA 1013.5 1008.8 1005.8 1007.8 1001.9 998.5 997.7 1000.5 1004.4 1008.9 1011.6 1011.7 997.7 DAY 19 21 25 26 29 16 12 24 2 3 12 5 MEAN QFF PRESSURE IN HPA 1017.0 1015.1 1011.2 1007.7 1001.3 994.6 993.6 997.1 1002.7 1008.6 1014.8 1017.6 1006.8 MAX. QFF PRESSURE IN HPA 1022.0 1019.6 1017.8 1013.7 1006.3 999.3 996.6 999.3 1008.9 1011.9 1021.1 1022.0 1022.0 DAY 30 10 1 1 11 1 28 15 22 16 20 28 MIN. QFF PRESSURE IN HPA 1013.2 1007.6 1003.7 1002.4 995.2 992.2 990.7 993.1 997.5 1004.0 1009.4 1010.3 990.7 DAY 19 21 25 26 29 15 4 24 1 1 11 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 934.5 933.0 930.9 929.7 925.1 920.1 919.5 922.5 926.7 931.0 934.3 936.4 928.6 MAX. QFE PRESSURE IN HPA 938.5 937.6 936.4 934.4 928.5 923.9 921.8 924.7 932.1 934.1 938.6 940.2 940.2 DAY 30 10 1 1 1 1 29 5 22 28 20 18 MIN. QFE PRESSURE IN HPA 931.4 926.6 923.0 927.3 920.4 917.7 917.0 919.8 922.5 927.0 928.6 929.9 917.0 DAY 19 21 25 9 25 16 4 24 2 3 18 5 MEAN QNH PRESSURE IN HPA 1015.6 1014.0 1011.8 1010.5 1005.6 1000.3 999.6 1002.8 1007.3 1011.9 1015.4 1017.7 1009.4 MAX. QNH PRESSURE IN HPA 1019.9 1019.0 1017.7 1015.5 1009.2 1004.3 1002.1 1005.2 1013.1 1015.2 1020.0 1021.7 1021.7 DAY 30 10 1 1 1 1 29 5 22 28 20 18 MIN. QNH PRESSURE IN HPA 1012.3 1007.2 1003.3 1007.9 1000.6 997.7 996.9 999.9 1002.8 1007.6 1009.3 1010.7 996.9 DAY 19 21 25 9 25 16 4 24 2 3 18 5 MEAN QFF PRESSURE IN HPA 1015.6 1013.4 1009.7 1006.7 1000.2 994.0 992.9 995.9 1001.5 1007.4 1013.4 1016.3 1005.6 MAX. QFF PRESSURE IN HPA 1020.8 1018.2 1015.7 1011.8 1004.8 998.3 995.0 998.3 1008.0 1010.7 1019.7 1020.9 1020.9 DAY 30 10 1 1 1 1 15 5 22 28 20 18 MIN. QFF PRESSURE IN HPA 1012.2 1005.7 1000.7 1002.8 994.7 991.6 990.3 992.9 996.1 1003.0 1006.9 1009.6 990.3 DAY 19 21 25 26 29 16 12 24 2 3 18 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 934.9 933.2 930.9 929.5 924.9 919.9 919.2 922.4 926.9 931.2 934.9 936.9 928.7 MAX. QFE PRESSURE IN HPA 938.9 936.8 936.8 934.4 928.0 923.5 921.9 924.7 931.5 933.6 939.2 940.4 940.4 DAY 30 10 1 1 1 3 26 5 22 23 20 22 MIN. QFE PRESSURE IN HPA 931.0 927.6 923.6 926.8 919.9 917.3 916.6 919.4 922.8 927.4 929.7 930.3 916.6 DAY 19 21 25 28 25 11 4 3 2 3 18 5 MEAN QNH PRESSURE IN HPA 1016.1 1014.3 1011.8 1010.3 1005.4 1000.0 999.3 1002.7 1007.5 1012.1 1016.0 1018.2 1009.5 MAX. QNH PRESSURE IN HPA 1020.4 1018.1 1018.1 1015.5 1008.7 1003.9 1002.2 1005.2 1012.4 1014.7 1020.7 1022.0 1022.0 DAY 30 10 1 1 1 3 26 5 22 23 20 22 MIN. QNH PRESSURE IN HPA 1011.9 1008.3 1004.0 1007.4 1000.0 997.2 996.5 999.5 1003.1 1008.0 1010.5 1011.2 996.5 DAY 19 21 25 28 25 11 4 3 2 3 18 5 MEAN QFF PRESSURE IN HPA 1016.7 1014.3 1010.3 1007.0 1000.4 994.2 993.0 996.3 1002.3 1008.3 1014.8 1017.3 1006.3 MAX. QFF PRESSURE IN HPA 1022.1 1017.9 1017.2 1012.6 1004.5 998.1 995.5 998.5 1007.8 1011.3 1021.5 1021.9 1022.1 DAY 29 1 1 1 1 1 26 5 22 27 20 22 MIN. QFF PRESSURE IN HPA 1012.1 1007.1 1001.6 1003.2 995.0 991.6 990.4 992.9 997.5 1004.4 1008.4 1009.7 990.4 DAY 19 21 25 28 25 16 4 3 1 3 18 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 935.7 934.0 931.9 930.3 926.0 920.8 920.2 923.4 927.9 932.1 935.6 937.5 929.6 MAX. QFE PRESSURE IN HPA 939.7 937.2 937.8 935.2 929.2 924.3 923.3 926.2 932.7 934.6 939.6 941.2 941.2 DAY 29 28 1 4 10 3 27 5 22 27 20 22 MIN. QFE PRESSURE IN HPA 931.6 928.9 925.0 927.6 920.6 918.2 917.7 920.8 924.4 928.5 929.8 932.4 917.7 DAY 19 21 25 25 25 16 4 3 2 3 11 5 MEAN QNH PRESSURE IN HPA 1017.0 1015.2 1012.8 1011.2 1006.6 1001.0 1000.4 1003.7 1008.5 1013.1 1016.8 1018.9 1010.4 MAX. QNH PRESSURE IN HPA 1021.2 1018.5 1019.2 1016.4 1010.0 1004.7 1003.7 1006.8 1013.7 1015.8 1021.1 1022.8 1022.8 DAY 29 28 1 4 10 3 27 5 22 27 20 22 MIN. QNH PRESSURE IN HPA 1012.5 1009.7 1005.5 1008.3 1000.8 998.2 997.7 1001.0 1004.8 1009.2 1010.6 1013.4 997.7 DAY 19 21 25 25 25 16 4 3 2 3 11 5 MEAN QFF PRESSURE IN HPA 1017.3 1014.9 1010.8 1007.2 1000.9 994.4 993.3 996.6 1002.6 1008.6 1015.1 1017.8 1006.6 MAX. QFF PRESSURE IN HPA 1022.5 1017.9 1017.6 1012.7 1005.6 998.4 996.2 999.3 1008.2 1011.5 1021.2 1023.0 1023.0 DAY 29 10 1 4 4 1 31 9 22 27 20 22 MIN. QFF PRESSURE IN HPA 1012.1 1009.3 1003.6 1003.2 994.7 991.5 990.6 993.4 998.1 1004.5 1008.7 1011.8 990.6 DAY 19 20 24 25 25 16 4 3 1 3 11 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 935.6 934.3 931.8 930.3 925.9 920.8 920.2 923.3 927.6 931.9 935.4 937.1 929.5 MAX. QFE PRESSURE IN HPA 939.7 938.1 937.8 935.4 929.8 924.4 923.3 926.2 932.3 935.0 940.2 940.9 940.9 DAY 29 28 1 1 4 2 27 5 22 23 20 22 MIN. QFE PRESSURE IN HPA 931.7 930.1 925.6 927.0 921.0 918.4 917.6 920.5 924.2 928.3 929.6 931.4 917.6 DAY 19 20 24 25 25 11 12 23 5 3 11 5 MEAN QNH PRESSURE IN HPA 1016.8 1015.4 1012.8 1011.2 1006.4 1001.0 1000.4 1003.7 1008.2 1012.9 1016.7 1018.4 1010.3 MAX. QNH PRESSURE IN HPA 1021.2 1019.5 1019.2 1016.6 1010.6 1004.8 1003.7 1006.8 1013.3 1016.2 1021.7 1022.5 1022.5 DAY 29 28 1 1 4 2 27 5 22 23 20 22 MIN. QNH PRESSURE IN HPA 1012.6 1010.9 1006.1 1007.6 1001.2 998.4 997.6 1000.7 1004.6 1009.0 1010.4 1012.3 997.6 DAY 19 20 24 25 25 11 12 23 5 3 11 5 MEAN QFF PRESSURE IN HPA 1016.6 1014.6 1010.4 1006.9 1000.6 994.2 993.3 996.3 1002.0 1008.0 1014.5 1017.1 1006.2 MAX. QFF PRESSURE IN HPA 1021.9 1018.1 1017.3 1012.5 1006.2 998.9 996.4 999.2 1007.6 1011.6 1021.0 1021.8 1021.9 DAY 29 15 1 1 4 1 31 5 22 23 20 22 MIN. QFF PRESSURE IN HPA 1011.8 1008.8 1003.2 1002.2 995.1 991.7 990.8 993.2 997.9 1003.1 1007.9 1011.0 990.8 DAY 19 20 24 25 25 5 12 23 1 1 17 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.1 11.8 16.7 20.5 29.0 32.4 34.6 34.1 30.4 25.6 17.2 11.7 22.8 MINIMUN AIR TEMPERATURE (C) 5.7 5.9 9.8 13.8 20.2 22.7 25.6 24.8 21.6 16.9 10.7 7.3 15.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 14 26 31 31 17 0 0 0 120 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) 1.4 1.4 6.0 8.2 14.4 18.6 23.2 21.6 18.6 11.0 6.0 1.2 1.2 DAY 27 2 1 14 5 8 9 31 18 26 27 26 MAXIMUM AIR TEMPERATURE (C) 15.5 18.0 23.6 26.6 36.4 40.1 42.0 42.0 39.0 34.2 24.0 17.2 29.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 8 31 30 31 31 30 30 0 0 191 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.8 23.0 28.4 36.0 41.0 44.2 45.0 46.2 43.6 38.8 28.4 22.8 46.2 DAY 1 24 26 28 25 17 20 12 2 6 12 7 DIF. BETWEEN (MAX.-MIN.) (C) 9.8 12.1 13.8 12.8 16.2 17.4 16.4 17.2 17.4 17.3 13.3 9.9 14.5 MEAN DAILY TEMP. (MDT) (C) 10.6 12.0 16.7 20.2 28.3 31.4 33.8 33.4 30.3 25.6 17.4 12.2 22.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.2 39.7 225.6 312.5 396.4 384.0 279.2 142.1 1.3 0.0 1782.0 HEATING DEG. DAYS(BASE 18 0C) 230.7 168.5 54.7 16.3 0.0 0.0 0.0 0.0 0.0 0.0 41.5 178.4 690.0 DEWPOINT (MEAN C) 5.2 4.8 6.4 7.9 1.9 2.7 4.3 4.0 5.7 3.2 5.1 6.2 4.8 MIXING RATIO (G/KG) 6.11 5.95 6.65 7.47 5.10 5.19 5.84 5.73 6.72 5.41 6.24 6.62 6.09 VAPOUR PRESSURE (HPA) 9.09 8.85 9.85 11.03 7.53 7.63 8.58 8.40 9.91 8.04 9.28 9.84 9.00 SATURATION DEF. (HPA) 3.63 5.57 10.04 14.56 34.78 43.23 48.79 47.48 35.85 26.63 11.15 4.43 23.84 RELATIVE HUMIDITY (MEAN %) 75 66 55 50 21 17 17 17 25 27 50 72 41 RELATIVE HUMIDITY (MAX. %) 94 89 81 74 40 32 30 31 44 47 75 91 61 RELATIVE HUMIDITY (MIN. %) 49 41 31 28 9 9 8 8 10 12 27 47 23 RELATIVE HUMIDITY (MEAN% 03UTC) 90 88 78 72 38 30 28 31 42 45 71 88 58 RELATIVE HUMIDITY (MEAN% 09UTC) 56 47 37 37 10 10 10 9 12 13 32 53 27 RELATIVE HUMIDITY (MEAN% 15UTC) 72 56 42 37 13 10 12 12 19 21 41 66 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 110.4 73.9 61.4 67.3 0.5 0.0 0.8 0.0 0.0 0.0 12.1 89.0 415.4 DAYS WITH PRECIPITATION >=10 3 3 2 2 0 0 0 0 0 0 0 4 14 DAYS WITH PRECIPITATION >= 5 4 4 3 5 0 0 0 0 0 0 1 6 23 DAYS WITH PRECIPITATION >= 1 7 6 4 6 0 0 0 0 0 0 4 7 34 DAYS WITH PRECIPITATION 10 9 5 8 1 0 1 0 0 0 5 9 48 GREATEST DAILY PRECIPITATION 41.0 27.0 29.0 31.0 0.5 0.0 0.8 0.0 0.0 0.0 7.0 23.3 41.0 DAY 11 14 19 12 12 ** 31 ** ** ** 13 9 DAY WITH THUNDER STORM 2 3 6 4 1 0 1 0 0 0 4 4 25 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 0 2 1 0 0 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 270 270 135 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.1 9.4 7.9 10.2 10.9 10.8 9.4 11.2 10.3 8.5 7.5 9.3 10.0 PREVAILING WIND PERCENT 14.5 14.7 11.3 17.1 29.4 32.9 34.3 37.1 32.1 25.4 12.5 10.1 22.7 CALMS PERCENT OF WIND 67.3 64.3 70.2 55.4 54.8 58.8 63.3 60.5 64.6 69.8 72.5 71.4 64.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 199 189 223 235 271 268 272 273 270 269 193 177 258 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.0 0.8 1.3 2.9 3.4 3.2 4.1 3.2 2.1 0.6 0.6 1.8 WIND STEADINESES (MEAN %) 34.4 29.4 30.8 27.7 60.4 79.1 94.1 95.3 88.9 87.5 26.1 25.0 52.9 WIND SPEED (MEAN KNOTS) 3.2 3.4 2.6 4.7 4.8 4.3 3.4 4.3 3.6 2.4 2.3 2.4 3.4 FASTEST WIND DIRECTION 120 120 120 120 290 290 270 270 270 290 120 100 120 FASTEST WIND SPEED (KNOTS) 19 31 23 29 31 21 19 21 23 17 21 19 31 DAY 10 19 18 11 26 4 25 11 13 3 19 1 DAYS WITH SKY CLEAR (0-2)/8 18 15 18 11 22 30 29 31 29 29 19 14 265 DAYS WITH P.CLOUDY (3-6)/8 7 7 7 11 7 0 2 0 1 2 9 11 64 DAYS WITH CLOUDY (7-8)/8 6 6 6 8 2 0 0 0 0 0 2 6 36 DAYS WITH VISIBILITY =< 2 KM 14 6 1 1 0 0 0 0 0 0 0 2 24 DURATION OF SUNSHINE HOURS 195.7 169.4 242.3 234.7 330.5 365.2 373.9 361.2 322.6 303.0 237.7 179.2 3315.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.2 936.0 932.7 930.2 927.0 923.1 922.1 922.0 927.9 932.2 935.1 936.0 930.0 MAX. QFE PRESSURE IN HPA 941.5 943.2 940.5 935.9 931.3 928.1 924.9 927.9 933.1 936.8 940.0 943.4 943.4 DAY-HOUR 25- 6 1- 6 11-21 1- 6 16- 6 6-21 3- 6 29- 6 21- 6 26- 6 29- 6 14- 6 MIN. QFE PRESSURE IN HPA 929.4 929.8 925.8 924.5 922.5 918.7 917.9 918.0 923.5 928.1 929.1 928.9 917.9 DAY-HOUR 11-15 25-12 28-12 19-15 21- 0 16-12 22-12 7- 0 10-12 13-12 6-15 21-12 MEAN QNH PRESSURE IN HPA 1017.5 1017.3 1013.7 1011.1 1007.6 1003.4 1002.4 1002.2 1008.6 1013.2 1016.3 1017.3 1010.9 MAX. QNH PRESSURE IN HPA 1023.1 1025.0 1022.1 1017.1 1012.2 1008.8 1005.4 1008.6 1014.1 1018.1 1021.5 1025.2 1025.2 DAY-HOUR 25- 6 1- 6 11-21 1- 6 16- 6 6-21 3- 6 29- 6 21- 6 26- 6 29- 6 14- 6 MIN. QNH PRESSURE IN HPA 1010.2 1010.6 1006.3 1004.9 1002.8 998.7 997.9 998.0 1003.9 1008.8 1009.9 1009.7 997.9 DAY-HOUR 11-15 25-12 28-12 19-15 21- 0 16-12 22-12 7- 0 10-12 13-12 6-15 21-12 MEAN QFF PRESSURE IN HPA 1017.5 1016.8 1011.8 1008.0 1002.3 997.2 995.6 995.6 1002.9 1008.8 1014.3 1016.8 1007.3 MAX. QFF PRESSURE IN HPA 1024.3 1026.4 1020.0 1014.9 1007.2 1003.2 998.5 1002.4 1008.7 1015.1 1020.7 1025.2 1026.4 DAY-HOUR 25- 6 1- 6 12- 3 1-15 16- 6 4- 3 5- 6 29- 3 21- 6 26- 6 29- 6 30- 6 MIN. QFF PRESSURE IN HPA 1008.9 1008.2 1002.4 1001.2 996.7 992.2 990.6 990.7 998.3 1003.9 1007.2 1008.9 990.6 DAY-HOUR 11-15 24-21 28-12 19-15 21- 0 17-12 22-12 13-12 10-12 13-12 6-15 21-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 936.0 935.9 932.5 929.9 926.6 922.6 921.7 921.4 927.5 931.9 934.9 935.8 929.7 MAX. QFE PRESSURE IN HPA 940.0 941.4 939.9 935.3 929.8 927.4 923.6 926.0 931.5 935.1 938.0 941.5 941.5 DAY 27 2 12 1 17 7 31 30 22 27 30 14 MIN. QFE PRESSURE IN HPA 931.4 930.8 927.1 925.4 922.5 918.9 918.3 918.0 924.1 928.5 929.7 929.9 918.0 DAY 22 25 18 12 21 17 23 7 6 13 7 22 MEAN QNH PRESSURE IN HPA 1017.2 1017.2 1013.5 1010.7 1007.2 1002.9 1001.9 1001.6 1008.2 1012.8 1016.0 1017.0 1010.5 MAX. QNH PRESSURE IN HPA 1021.5 1023.0 1021.4 1016.5 1010.6 1008.0 1004.0 1006.5 1012.4 1016.3 1019.4 1023.1 1023.1 DAY 27 2 12 1 17 7 31 30 22 27 30 14 MIN. QNH PRESSURE IN HPA 1012.3 1011.7 1007.7 1005.9 1002.8 999.0 998.3 998.0 1004.5 1009.2 1010.5 1010.7 998.0 DAY 22 25 18 12 21 17 23 7 6 13 7 22 MEAN QFF PRESSURE IN HPA 1016.9 1016.5 1011.4 1007.6 1001.8 996.8 995.1 995.0 1002.3 1008.3 1013.8 1016.3 1006.8 MAX. QFF PRESSURE IN HPA 1021.7 1023.8 1019.0 1014.3 1005.6 1001.7 997.0 1000.6 1006.8 1012.8 1018.0 1022.8 1023.8 DAY 26 2 12 1 17 7 3 30 22 27 30 14 MIN. QFF PRESSURE IN HPA 1011.3 1008.9 1004.3 1002.7 996.7 992.3 990.9 991.2 998.6 1004.4 1008.1 1010.0 990.9 DAY 8 25 18 30 21 17 23 14 6 13 7 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 936.1 936.1 932.6 930.3 927.2 923.3 922.2 922.2 928.0 932.4 935.3 935.9 930.1 MAX. QFE PRESSURE IN HPA 940.2 941.6 939.8 935.3 930.3 927.9 924.3 927.1 931.8 935.4 938.8 942.3 942.3 DAY 26 2 12 2 17 4 31 29 21 10 29 14 MIN. QFE PRESSURE IN HPA 931.7 930.8 926.9 925.0 923.0 920.0 919.4 918.9 924.2 929.2 930.6 929.4 918.9 DAY 8 25 26 3 21 16 23 7 6 13 7 21 MEAN QNH PRESSURE IN HPA 1017.3 1017.3 1013.6 1011.1 1007.8 1003.7 1002.5 1002.5 1008.7 1013.4 1016.5 1017.2 1011.0 MAX. QNH PRESSURE IN HPA 1021.7 1023.2 1021.3 1016.5 1011.2 1008.6 1004.7 1007.7 1012.8 1016.6 1020.2 1024.0 1024.0 DAY 26 2 12 2 17 4 31 29 21 10 29 14 MIN. QNH PRESSURE IN HPA 1012.6 1011.7 1007.5 1005.5 1003.3 1000.1 999.5 999.0 1004.6 1010.0 1011.5 1010.2 999.0 DAY 8 25 26 3 21 16 23 7 6 13 7 21 MEAN QFF PRESSURE IN HPA 1017.7 1017.3 1012.2 1008.5 1003.0 998.0 996.2 996.4 1003.6 1009.8 1015.0 1017.1 1007.9 MAX. QFF PRESSURE IN HPA 1023.0 1024.7 1020.0 1014.3 1006.5 1003.2 998.3 1002.4 1007.9 1014.2 1019.8 1024.1 1024.7 DAY 26 2 12 1 17 4 3 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1011.5 1009.9 1004.7 1002.8 997.6 994.1 993.0 992.8 999.3 1005.8 1009.4 1009.5 992.8 DAY 8 25 26 3 21 17 23 14 6 13 7 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 937.2 937.1 933.8 931.3 928.2 924.0 923.0 923.1 929.0 933.5 936.5 937.3 931.2 MAX. QFE PRESSURE IN HPA 941.5 943.2 940.2 935.9 931.3 927.9 924.9 927.9 933.1 936.8 940.0 943.4 943.4 DAY 25 1 11 1 16 3 3 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 931.6 932.0 928.0 924.8 924.5 920.7 920.0 919.1 925.5 930.4 932.5 931.7 919.1 DAY 11 25 28 3 21 17 22 7 6 13 7 21 MEAN QNH PRESSURE IN HPA 1018.6 1018.5 1014.9 1012.2 1008.9 1004.4 1003.3 1003.4 1009.8 1014.6 1017.7 1018.7 1012.1 MAX. QNH PRESSURE IN HPA 1023.1 1025.0 1021.7 1017.1 1012.2 1008.6 1005.4 1008.6 1014.1 1018.1 1021.5 1025.2 1025.2 DAY 25 1 11 1 16 3 3 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1012.5 1013.0 1008.7 1005.3 1004.9 1000.9 1000.1 999.2 1006.0 1011.3 1013.5 1012.6 999.2 DAY 11 25 28 3 21 17 22 7 6 13 7 21 MEAN QFF PRESSURE IN HPA 1018.8 1018.2 1012.9 1009.1 1003.4 998.0 996.4 996.6 1003.9 1010.2 1015.7 1018.4 1008.5 MAX. QFF PRESSURE IN HPA 1024.3 1026.4 1020.0 1014.8 1007.2 1002.1 998.5 1002.2 1008.7 1015.1 1020.7 1025.2 1026.4 DAY 25 1 11 1 16 3 5 29 21 26 29 30 MIN. QFF PRESSURE IN HPA 1012.0 1011.2 1005.2 1002.3 998.8 993.8 992.6 992.1 999.9 1006.5 1010.8 1012.2 992.1 DAY 11 25 28 3 21 17 23 13 6 14 7 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 936.7 936.6 933.4 930.9 927.6 923.5 922.5 922.4 928.3 932.4 935.3 936.4 930.5 MAX. QFE PRESSURE IN HPA 941.1 943.0 939.7 935.0 931.0 927.9 924.7 927.0 932.5 935.5 938.6 942.1 943.0 DAY 26 1 11 1 16 6 5 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 931.4 931.0 926.9 925.2 924.3 919.8 919.2 918.6 925.2 929.3 931.5 930.5 918.6 DAY 11 25 28 3 20 16 22 7 6 13 6 21 MEAN QNH PRESSURE IN HPA 1018.0 1017.9 1014.5 1011.8 1008.3 1003.9 1002.8 1002.7 1009.0 1013.4 1016.5 1017.7 1011.4 MAX. QNH PRESSURE IN HPA 1022.7 1024.7 1021.2 1016.2 1011.9 1008.6 1005.2 1007.6 1013.5 1016.7 1020.0 1023.8 1024.7 DAY 26 1 11 1 16 6 5 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1012.3 1011.9 1007.5 1005.7 1004.7 999.9 999.3 998.6 1005.7 1010.1 1012.4 1011.4 998.6 DAY 11 25 28 3 20 16 22 7 6 13 6 21 MEAN QFF PRESSURE IN HPA 1017.7 1017.2 1012.3 1008.6 1002.8 997.4 995.7 995.7 1002.9 1008.6 1014.2 1016.9 1007.5 MAX. QFF PRESSURE IN HPA 1023.2 1025.6 1019.0 1013.6 1006.7 1002.1 998.1 1001.3 1007.5 1013.1 1018.5 1023.2 1025.6 DAY 25 1 11 9 16 6 5 30 21 26 29 14 MIN. QFF PRESSURE IN HPA 1011.8 1009.7 1003.7 1003.1 998.5 993.0 991.9 991.3 999.3 1005.1 1009.4 1010.7 991.3 DAY 11 25 28 3 20 16 22 13 6 14 6 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 935.2 935.0 931.8 929.8 926.5 922.6 921.6 921.2 927.0 931.0 934.1 934.9 929.2 MAX. QFE PRESSURE IN HPA 939.8 941.2 938.0 934.6 929.9 927.1 923.9 926.3 931.2 934.7 937.0 941.1 941.2 DAY 26 1 13 1 10 6 5 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 929.6 929.8 925.8 925.7 923.0 918.7 917.9 918.0 923.5 928.1 929.3 928.9 917.9 DAY 21 25 28 19 20 16 22 7 10 13 6 21 MEAN QNH PRESSURE IN HPA 1016.4 1016.2 1012.7 1010.6 1007.1 1002.9 1001.8 1001.4 1007.6 1011.9 1015.2 1016.1 1010.0 MAX. QNH PRESSURE IN HPA 1021.3 1022.8 1019.4 1015.8 1010.7 1007.7 1004.3 1006.9 1012.1 1015.9 1018.3 1022.7 1022.8 DAY 26 1 13 1 10 6 5 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1010.4 1010.6 1006.3 1006.2 1003.3 998.7 997.9 998.0 1003.9 1008.8 1010.1 1009.7 997.9 DAY 21 25 28 19 20 16 22 7 10 13 6 21 MEAN QFF PRESSURE IN HPA 1016.2 1015.5 1010.6 1007.5 1001.9 996.8 995.1 994.8 1001.8 1007.5 1013.0 1015.4 1006.4 MAX. QFF PRESSURE IN HPA 1021.6 1023.6 1017.2 1013.0 1005.6 1001.7 997.8 1001.0 1006.5 1012.5 1016.9 1022.2 1023.6 DAY 26 1 13 1 16 6 5 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1009.5 1008.5 1002.4 1002.4 997.3 992.2 990.6 990.7 998.3 1003.9 1007.5 1008.9 990.6 DAY 11 25 28 19 20 17 22 13 10 13 6 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 935.7 935.3 931.9 929.4 926.2 922.2 921.3 921.2 927.2 931.5 934.6 935.5 929.3 MAX. QFE PRESSURE IN HPA 940.4 941.8 938.4 935.6 930.0 926.6 923.1 926.1 931.1 935.2 937.6 940.7 941.8 DAY 26 1 11 1 10 3 30 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 929.4 930.6 926.0 924.5 922.6 918.7 918.2 918.2 923.9 928.2 929.1 929.8 918.2 DAY 11 25 28 19 28 16 22 10 10 12 6 21 MEAN QNH PRESSURE IN HPA 1017.0 1016.5 1012.8 1010.2 1006.8 1002.5 1001.5 1001.4 1007.8 1012.5 1015.8 1016.8 1010.1 MAX. QNH PRESSURE IN HPA 1022.0 1023.5 1019.8 1016.8 1010.8 1007.2 1003.4 1006.7 1012.0 1016.4 1019.0 1022.3 1023.5 DAY 26 1 11 1 10 3 30 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1010.2 1011.5 1006.5 1004.9 1002.9 998.7 998.2 998.2 1004.3 1008.9 1009.9 1010.6 998.2 DAY 11 25 28 19 28 16 22 10 10 12 6 21 MEAN QFF PRESSURE IN HPA 1017.3 1016.4 1011.3 1007.6 1002.0 996.9 995.3 995.4 1002.8 1008.8 1014.3 1016.6 1007.1 MAX. QFF PRESSURE IN HPA 1023.1 1024.8 1018.5 1014.9 1005.7 1001.5 997.3 1001.3 1007.1 1014.1 1018.3 1022.5 1024.8 DAY 26 1 11 1 15 3 5 29 20 26 29 14 MIN. QFF PRESSURE IN HPA 1008.9 1009.9 1003.3 1001.2 997.5 992.9 991.8 991.8 999.1 1004.8 1007.2 1009.9 991.8 DAY 11 25 28 19 28 16 22 13 8 12 6 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 936.6 936.2 932.9 930.3 927.0 923.2 922.3 922.3 928.2 932.4 935.3 936.3 930.2 MAX. QFE PRESSURE IN HPA 940.8 942.3 940.2 935.5 930.0 927.7 924.6 927.4 932.6 935.9 938.5 941.9 942.3 DAY 31 1 11 1 16 6 30 29 21 26 29 13 MIN. QFE PRESSURE IN HPA 930.2 930.8 927.1 926.5 923.3 919.4 919.3 919.0 924.8 928.4 929.8 930.3 919.0 DAY 11 24 17 3 20 16 22 6 8 12 6 21 MEAN QNH PRESSURE IN HPA 1017.9 1017.4 1013.9 1011.2 1007.6 1003.6 1002.6 1002.5 1008.9 1013.4 1016.5 1017.5 1011.1 MAX. QNH PRESSURE IN HPA 1022.4 1024.0 1021.7 1016.7 1010.8 1008.4 1005.1 1008.0 1013.6 1017.1 1019.9 1023.6 1024.0 DAY 31 1 11 1 16 6 30 29 21 26 29 13 MIN. QNH PRESSURE IN HPA 1011.0 1011.7 1007.7 1007.1 1003.7 999.5 999.4 999.1 1005.3 1009.1 1010.6 1011.2 999.1 DAY 11 24 17 3 20 16 22 6 8 12 6 21 MEAN QFF PRESSURE IN HPA 1018.1 1017.1 1012.0 1008.0 1002.1 997.1 995.5 995.7 1003.1 1009.0 1014.5 1017.2 1007.4 MAX. QFF PRESSURE IN HPA 1023.7 1025.2 1019.6 1014.0 1005.5 1001.7 997.8 1001.7 1007.9 1013.7 1018.6 1023.5 1025.2 DAY 31 1 11 1 16 6 30 29 21 26 29 13 MIN. QFF PRESSURE IN HPA 1009.8 1009.9 1004.8 1003.6 997.5 992.6 991.9 991.8 999.1 1004.4 1007.6 1010.1 991.8 DAY 11 24 17 29 20 16 22 6 8 12 6 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 936.5 936.0 933.0 930.0 927.0 923.2 922.3 922.1 928.1 932.4 935.3 936.0 930.1 MAX. QFE PRESSURE IN HPA 940.8 941.8 940.5 935.4 930.3 928.1 924.9 926.7 932.6 935.9 938.5 941.7 941.8 DAY 31 1 11 1 16 6 30 29 21 26 29 13 MIN. QFE PRESSURE IN HPA 931.1 930.1 927.8 926.3 923.3 919.4 919.0 918.7 924.8 928.6 929.9 929.9 918.7 DAY 21 24 17 11 20 16 22 13 8 12 6 21 MEAN QNH PRESSURE IN HPA 1017.7 1017.2 1014.1 1010.9 1007.6 1003.5 1002.6 1002.4 1008.8 1013.4 1016.5 1017.2 1011.0 MAX. QNH PRESSURE IN HPA 1022.4 1023.5 1022.1 1016.6 1011.2 1008.8 1005.4 1007.3 1013.6 1017.1 1019.9 1023.3 1023.5 DAY 31 1 11 1 16 6 30 29 21 26 29 13 MIN. QNH PRESSURE IN HPA 1012.0 1010.9 1008.5 1006.9 1003.7 999.5 999.1 998.7 1005.3 1009.3 1010.7 1010.7 998.7 DAY 21 24 17 11 20 16 22 13 8 12 6 21 MEAN QFF PRESSURE IN HPA 1017.5 1016.4 1011.8 1007.5 1002.0 997.0 995.5 995.3 1002.6 1008.6 1014.1 1016.5 1007.1 MAX. QFF PRESSURE IN HPA 1023.3 1024.2 1019.4 1012.8 1005.7 1002.2 997.9 1001.0 1007.4 1013.1 1018.0 1022.5 1024.2 DAY 31 1 11 1 16 6 30 29 21 26 29 13 MIN. QFF PRESSURE IN HPA 1011.6 1008.2 1005.0 1002.3 997.2 992.4 991.5 991.1 998.9 1004.1 1008.0 1009.8 991.1 DAY 21 24 17 30 20 16 22 13 8 12 6 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.1 12.7 15.0 22.2 28.0 33.3 34.5 34.3 30.5 25.3 16.5 12.5 22.9 MINIMUN AIR TEMPERATURE (C) 4.9 7.3 8.3 14.9 19.5 23.4 25.6 25.7 21.0 16.7 9.3 8.0 15.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 11 28 31 31 12 0 0 0 113 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) 0.6 1.0 1.0 9.0 11.0 20.0 22.2 22.0 19.2 13.2 2.6 4.0 0.6 DAY 20 18 1 2 1 7 1 31 11 24 19 10 MAXIMUM AIR TEMPERATURE (C) 16.0 18.5 22.0 29.7 35.1 41.2 41.9 42.4 39.1 33.9 24.3 18.2 30.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 12 31 30 31 31 30 30 0 0 195 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.2 22.8 27.4 35.4 38.8 43.2 45.6 44.4 44.0 37.4 29.8 23.0 45.6 DAY 9 24 25 9 22 16 12 9 3 2 6 18 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 11.2 13.7 14.8 15.6 17.8 16.3 16.7 18.1 17.2 15.0 10.2 14.8 MEAN DAILY TEMP. (MDT) (C) 10.5 12.9 15.1 22.3 27.3 32.3 33.7 34.1 30.1 25.3 16.8 13.1 22.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 53.3 195.8 339.3 395.0 405.1 271.7 133.5 1.0 0.0 1794.7 HEATING DEG. DAYS(BASE 18 0C) 232.8 142.3 92.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 59.0 151.2 677.7 DEWPOINT (MEAN C) 4.9 4.8 4.8 7.0 4.2 4.4 5.5 10.6 4.2 5.3 1.5 7.3 5.4 MIXING RATIO (G/KG) 5.91 6.04 6.10 7.02 5.74 5.85 6.30 9.36 5.81 6.16 4.86 7.04 6.35 VAPOUR PRESSURE (HPA) 8.80 8.97 9.04 10.38 8.48 8.59 9.22 13.64 8.57 9.13 7.25 10.48 9.38 SATURATION DEF. (HPA) 3.98 6.16 8.78 17.78 31.10 44.89 47.79 42.83 37.46 24.74 12.71 4.39 23.55 RELATIVE HUMIDITY (MEAN %) 74 62 56 43 24 19 18 27 21 31 41 74 41 RELATIVE HUMIDITY (MAX. %) 93 86 82 72 41 34 31 44 36 51 63 92 60 RELATIVE HUMIDITY (MIN. %) 49 37 30 21 13 9 10 13 10 15 20 49 23 RELATIVE HUMIDITY (MEAN% 03UTC) 89 84 77 64 40 32 30 42 34 47 60 88 57 RELATIVE HUMIDITY (MEAN% 09UTC) 56 46 35 26 15 10 11 15 12 16 22 55 27 RELATIVE HUMIDITY (MEAN% 15UTC) 68 53 44 29 16 11 12 21 15 25 33 71 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 130.6 24.3 67.2 50.5 0.7 0.0 0.0 4.0 0.0 0.0 7.5 149.1 433.9 DAYS WITH PRECIPITATION >=10 4 1 3 2 0 0 0 0 0 0 0 4 14 DAYS WITH PRECIPITATION >= 5 6 2 4 2 0 0 0 0 0 0 1 4 19 DAYS WITH PRECIPITATION >= 1 8 5 5 6 0 0 0 1 0 0 1 8 34 DAYS WITH PRECIPITATION 10 9 8 8 2 0 0 1 0 0 2 8 48 GREATEST DAILY PRECIPITATION 39.0 11.4 26.9 29.0 0.4 0.0 0.0 4.0 0.0 0.0 7.5 53.0 53.0 DAY 16 5 26 23 12 ** ** 7 ** ** 30 6 DAY WITH THUNDER STORM 1 1 2 6 1 0 0 1 0 0 1 6 19 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 1 1 3 0 0 0 0 0 0 0 5 WIND DIRECTION (PREVAILING) 135 135 270 270 270 270 270 270 270 270 270 90 270 PREVAILING WIND SPEED(KNOTS) 8.8 7.8 8.0 7.9 9.8 10.5 10.2 8.5 8.6 8.1 6.0 7.8 8.9 PREVAILING WIND PERCENT 12.1 14.3 10.9 12.1 30.2 32.1 33.5 21.4 24.6 16.9 9.6 8.9 17.7 CALMS PERCENT OF WIND 75.8 64.3 71.0 65.8 62.5 65.8 65.7 74.2 72.9 76.6 83.3 87.1 72.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 129 175 173 168 275 274 269 269 270 260 223 105 255 VECTOR WIND MAGNITUDE(KNOTS) 1.3 1.0 0.6 0.9 2.8 3.4 3.4 1.7 2.0 1.1 0.2 0.7 1.1 WIND STEADINESES (MEAN %) 65.0 38.5 24.0 31.0 80.0 94.4 100.0 77.3 87.0 61.1 18.2 70.0 45.8 WIND SPEED (MEAN KNOTS) 2.0 2.6 2.5 2.9 3.5 3.6 3.4 2.2 2.3 1.8 1.1 1.0 2.4 FASTEST WIND DIRECTION 90 140 150 180 350 280 270 360 270 270 270 90 180 FASTEST WIND SPEED (KNOTS) 19 17 17 31 21 21 23 21 23 21 16 21 31 DAY 28 19 12 16 27 7 19 7 24 5 1 12 DAYS WITH SKY CLEAR (0-2)/8 17 12 14 14 19 28 30 31 30 31 22 16 264 DAYS WITH P.CLOUDY (3-6)/8 8 10 9 10 10 1 1 0 0 0 4 9 62 DAYS WITH CLOUDY (7-8)/8 6 6 8 6 2 1 0 0 0 0 4 6 39 DAYS WITH VISIBILITY =< 2 KM 8 1 3 0 0 0 0 0 0 0 0 9 21 DURATION OF SUNSHINE HOURS 202.4 184.7 190.3 236.0 317.8 347.4 346.2 348.9 324.8 298.3 233.1 184.8 3214.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 936.3 933.2 932.4 931.0 928.7 922.4 919.6 922.5 926.7 932.6 935.4 936.8 929.8 MAX. QFE PRESSURE IN HPA 943.0 939.7 940.4 938.2 934.5 929.9 925.0 926.4 932.3 937.6 943.5 942.0 943.5 DAY-HOUR 6- 6 6- 6 3- 6 8- 6 10- 9 1- 6 3- 9 29- 6 27- 6 30- 9 25- 6 30- 6 MIN. QFE PRESSURE IN HPA 927.7 927.0 923.6 925.5 922.3 916.2 916.7 919.2 921.5 927.3 930.1 929.6 916.2 DAY-HOUR 28-12 19-12 12-12 14- 3 28-15 30-12 1- 0 21- 0 6-15 6-12 8-12 6- 3 MEAN QNH PRESSURE IN HPA 1017.5 1014.2 1013.4 1011.9 1009.4 1002.7 999.7 1002.8 1007.3 1013.6 1016.6 1018.1 1010.6 MAX. QNH PRESSURE IN HPA 1024.7 1021.2 1022.0 1019.6 1015.6 1010.7 1005.5 1007.0 1013.3 1019.0 1025.3 1023.7 1025.3 DAY-HOUR 6- 6 6- 6 3- 6 8- 6 10- 9 1- 6 3- 9 29- 6 27- 6 30- 9 25- 6 30- 6 MIN. QNH PRESSURE IN HPA 1008.4 1007.6 1004.0 1006.0 1002.6 996.1 996.6 999.3 1001.7 1007.9 1010.9 1010.4 996.1 DAY-HOUR 28-12 19-12 12-12 14- 3 28-15 30-12 1- 0 21- 0 6-15 6-12 8-12 6- 3 MEAN QFF PRESSURE IN HPA 1017.6 1013.5 1012.0 1008.4 1004.4 996.3 992.9 996.0 1001.6 1009.3 1014.8 1017.4 1007.0 MAX. QFF PRESSURE IN HPA 1024.8 1021.4 1021.7 1015.5 1011.2 1004.8 998.4 1000.9 1007.8 1014.8 1024.1 1023.4 1024.8 DAY-HOUR 6- 6 6- 6 3- 6 8- 6 10- 9 1- 6 3- 9 29- 3 27- 6 30- 9 25- 6 30- 6 MIN. QFF PRESSURE IN HPA 1007.6 1006.7 1001.3 1002.5 996.5 989.8 990.3 991.7 995.4 1003.7 1008.0 1008.8 989.8 DAY-HOUR 28-12 20-12 12- 9 14- 0 28-15 30-12 1- 0 20-18 3-21 6-12 8-12 6-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 935.9 933.1 932.1 930.4 928.4 922.2 919.4 922.3 926.4 932.2 935.0 936.5 929.5 MAX. QFE PRESSURE IN HPA 942.5 937.7 938.5 935.6 931.5 929.0 922.7 925.0 930.9 935.9 940.0 940.5 942.5 DAY 7 1 3 8 1 1 3 29 27 31 26 30 MIN. QFE PRESSURE IN HPA 928.9 928.3 927.0 925.6 924.6 917.2 916.7 919.2 922.4 928.2 931.2 929.9 916.7 DAY 29 19 13 14 29 22 1 21 4 7 9 6 MEAN QNH PRESSURE IN HPA 1017.1 1014.1 1013.1 1011.2 1009.1 1002.5 999.4 1002.5 1007.0 1013.1 1016.2 1017.8 1010.3 MAX. QNH PRESSURE IN HPA 1024.2 1019.1 1019.9 1016.8 1012.4 1009.8 1003.0 1005.5 1011.8 1017.1 1021.5 1022.1 1024.2 DAY 7 1 3 8 1 1 3 29 27 31 26 30 MIN. QNH PRESSURE IN HPA 1009.7 1009.0 1007.6 1006.1 1005.1 997.1 996.6 999.3 1002.7 1008.9 1012.1 1010.7 996.6 DAY 29 19 13 14 29 22 1 21 4 7 9 6 MEAN QFF PRESSURE IN HPA 1016.9 1013.1 1011.6 1007.6 1004.1 996.1 992.6 995.6 1001.2 1008.7 1014.2 1016.8 1006.5 MAX. QFF PRESSURE IN HPA 1023.9 1018.9 1019.9 1012.5 1009.4 1004.0 996.6 999.2 1006.2 1013.2 1020.0 1021.3 1023.9 DAY 7 1 3 8 1 1 3 29 27 31 26 22 MIN. QFF PRESSURE IN HPA 1009.0 1007.9 1004.4 1002.5 998.8 990.8 990.3 992.0 995.6 1004.6 1009.1 1009.2 990.3 DAY 29 14 26 14 28 30 1 21 4 1 9 6 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 936.0 933.1 932.5 930.9 929.0 922.8 919.8 922.8 926.9 932.7 935.5 936.7 929.9 MAX. QFE PRESSURE IN HPA 942.5 938.0 938.5 937.1 933.4 929.5 924.0 925.9 931.6 936.0 941.7 940.6 942.5 DAY 7 6 3 8 11 1 3 29 27 30 25 30 MIN. QFE PRESSURE IN HPA 929.9 927.2 925.6 925.5 924.8 917.7 917.2 920.0 923.4 928.7 931.6 929.6 917.2 DAY 29 19 12 14 29 30 1 21 7 1 8 6 MEAN QNH PRESSURE IN HPA 1017.2 1014.1 1013.5 1011.8 1009.7 1003.1 999.9 1003.2 1007.5 1013.7 1016.7 1018.0 1010.7 MAX. QNH PRESSURE IN HPA 1024.2 1019.4 1019.9 1018.4 1014.5 1010.3 1004.4 1006.4 1012.5 1017.2 1023.3 1022.2 1024.2 DAY 7 6 3 8 11 1 3 29 27 30 25 30 MIN. QNH PRESSURE IN HPA 1010.7 1007.8 1006.1 1006.0 1005.3 997.7 997.1 1000.1 1003.8 1009.4 1012.5 1010.4 997.1 DAY 29 19 12 14 29 30 1 21 7 1 8 6 MEAN QFF PRESSURE IN HPA 1017.7 1013.7 1012.5 1008.7 1005.2 997.2 993.6 996.8 1002.4 1010.0 1015.5 1017.6 1007.6 MAX. QFF PRESSURE IN HPA 1024.8 1020.0 1020.7 1014.8 1010.0 1004.7 998.3 1000.9 1007.7 1014.1 1022.8 1022.1 1024.8 DAY 7 6 2 8 1 1 3 29 27 31 25 22 MIN. QFF PRESSURE IN HPA 1010.1 1007.3 1003.8 1003.2 999.6 991.6 991.2 993.4 997.9 1004.9 1010.5 1009.0 991.2 DAY 28 14 12 14 29 30 30 21 4 1 8 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 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 937.4 934.3 933.5 932.2 929.7 923.4 920.5 923.4 927.8 933.8 936.7 938.0 930.9 MAX. QFE PRESSURE IN HPA 943.0 939.7 940.4 938.2 934.5 929.9 924.6 926.4 932.3 937.1 943.5 942.0 943.5 DAY 6 6 3 8 11 1 3 29 27 29 25 30 MIN. QFE PRESSURE IN HPA 931.1 928.2 926.7 928.3 926.0 917.9 918.2 920.8 924.2 929.7 932.3 929.8 917.9 DAY 28 19 12 14 28 30 30 20 6 7 8 6 MEAN QNH PRESSURE IN HPA 1018.7 1015.5 1014.6 1013.2 1010.5 1003.7 1000.6 1003.8 1008.5 1014.9 1018.0 1019.4 1011.8 MAX. QNH PRESSURE IN HPA 1024.7 1021.2 1022.0 1019.6 1015.6 1010.7 1005.1 1007.0 1013.3 1018.4 1025.3 1023.7 1025.3 DAY 6 6 3 8 11 1 3 29 27 29 25 30 MIN. QNH PRESSURE IN HPA 1012.0 1008.9 1007.3 1009.0 1006.5 997.9 998.2 1001.0 1004.6 1010.5 1013.3 1010.6 997.9 DAY 28 19 12 14 28 30 30 20 6 7 8 6 MEAN QFF PRESSURE IN HPA 1019.0 1014.8 1013.2 1009.7 1005.4 997.1 993.7 996.8 1002.7 1010.6 1016.3 1018.8 1008.2 MAX. QFF PRESSURE IN HPA 1024.8 1021.4 1021.7 1015.5 1010.6 1004.8 998.2 1000.7 1007.8 1014.3 1024.1 1023.4 1024.8 DAY 6 6 3 8 11 1 3 29 27 29 25 30 MIN. QFF PRESSURE IN HPA 1011.9 1008.6 1004.5 1004.4 1000.7 991.0 991.3 993.8 998.1 1005.6 1010.5 1008.9 991.0 DAY 28 19 12 28 28 30 30 20 5 1 8 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 936.6 933.7 933.0 931.7 929.4 923.0 920.1 922.9 927.2 933.0 935.8 937.1 930.3 MAX. QFE PRESSURE IN HPA 942.2 939.1 939.9 936.5 934.5 929.5 925.0 925.7 931.2 937.6 942.1 940.4 942.2 DAY 6 6 3 7 10 2 3 29 27 30 25 30 MIN. QFE PRESSURE IN HPA 929.7 928.0 923.9 928.5 925.4 917.6 918.1 920.7 923.4 928.8 931.4 929.6 917.6 DAY 28 19 12 16 28 30 25 21 6 6 8 6 MEAN QNH PRESSURE IN HPA 1017.9 1014.7 1014.0 1012.7 1010.2 1003.4 1000.2 1003.2 1007.9 1014.0 1017.1 1018.4 1011.1 MAX. QNH PRESSURE IN HPA 1023.9 1020.6 1021.4 1017.8 1015.6 1010.3 1005.5 1006.2 1012.1 1019.0 1023.8 1022.0 1023.9 DAY 6 6 3 7 10 2 3 29 27 30 25 30 MIN. QNH PRESSURE IN HPA 1010.5 1008.7 1004.3 1009.2 1005.9 997.6 998.1 1000.9 1003.8 1009.5 1012.3 1010.4 997.6 DAY 28 19 12 16 28 30 25 21 6 6 8 6 MEAN QFF PRESSURE IN HPA 1017.7 1013.7 1012.4 1008.9 1004.9 996.7 993.2 996.1 1001.8 1009.4 1014.9 1017.4 1007.3 MAX. QFF PRESSURE IN HPA 1023.5 1020.1 1021.0 1013.5 1011.2 1003.9 998.4 999.8 1006.3 1014.8 1021.9 1021.2 1023.5 DAY 6 6 3 7 10 1 3 29 27 30 25 14 MIN. QFF PRESSURE IN HPA 1010.0 1007.3 1001.3 1005.2 999.3 991.0 991.1 993.7 997.1 1004.8 1009.0 1009.0 991.0 DAY 28 14 12 16 28 30 10 20 6 7 8 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 935.3 932.3 931.7 930.4 928.1 921.9 919.3 922.0 926.1 931.6 934.5 935.9 929.1 MAX. QFE PRESSURE IN HPA 940.5 937.4 938.6 935.3 932.2 928.4 923.9 924.7 930.4 936.0 940.2 939.6 940.5 DAY 6 6 3 8 10 1 3 29 27 30 25 30 MIN. QFE PRESSURE IN HPA 927.7 927.0 923.6 926.6 923.3 916.2 917.5 920.0 921.9 927.3 930.1 929.7 916.2 DAY 28 19 12 27 28 30 25 20 3 6 8 6 MEAN QNH PRESSURE IN HPA 1016.5 1013.3 1012.7 1011.3 1008.7 1002.1 999.4 1002.3 1006.7 1012.5 1015.6 1017.1 1009.9 MAX. QNH PRESSURE IN HPA 1022.1 1018.7 1020.0 1016.5 1013.2 1009.1 1004.3 1005.2 1011.3 1017.2 1021.7 1021.1 1022.1 DAY 6 6 3 8 10 1 3 29 27 30 25 30 MIN. QNH PRESSURE IN HPA 1008.4 1007.6 1004.0 1007.2 1003.7 996.1 997.5 1000.1 1002.2 1007.9 1010.9 1010.5 996.1 DAY 28 19 12 27 28 30 25 20 3 6 8 6 MEAN QFF PRESSURE IN HPA 1016.3 1012.3 1011.2 1007.7 1003.8 995.8 992.6 995.5 1000.9 1008.2 1013.7 1016.1 1006.2 MAX. QFF PRESSURE IN HPA 1021.7 1018.2 1019.7 1012.3 1008.9 1003.0 997.5 999.0 1005.8 1013.1 1020.2 1020.1 1021.7 DAY 6 6 3 7 10 1 3 29 27 30 25 30 MIN. QFF PRESSURE IN HPA 1007.6 1006.7 1001.5 1002.6 997.0 989.8 990.5 993.2 995.4 1003.7 1008.0 1008.8 989.8 DAY 28 20 12 27 28 30 10 20 3 6 8 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 935.8 932.5 931.7 930.2 927.7 921.5 918.9 921.8 925.9 931.9 934.7 936.4 929.1 MAX. QFE PRESSURE IN HPA 941.3 937.1 938.8 935.1 932.2 928.8 922.9 924.4 929.5 935.4 941.3 940.2 941.3 DAY 6 6 3 8 10 1 3 29 27 30 25 21 MIN. QFE PRESSURE IN HPA 927.7 927.7 924.0 926.3 922.3 916.4 916.7 919.4 921.5 928.1 930.1 931.0 916.4 DAY 28 19 12 27 28 30 25 20 6 7 8 6 MEAN QNH PRESSURE IN HPA 1017.1 1013.5 1012.6 1011.0 1008.3 1001.7 998.9 1002.0 1006.4 1012.9 1015.9 1017.7 1009.8 MAX. QNH PRESSURE IN HPA 1022.9 1018.4 1020.2 1016.3 1013.2 1009.5 1003.2 1004.8 1010.3 1016.6 1022.9 1021.7 1022.9 DAY 6 6 3 8 10 1 3 29 27 30 25 21 MIN. QNH PRESSURE IN HPA 1008.4 1008.4 1004.4 1006.9 1002.6 996.3 996.6 999.5 1001.7 1008.8 1010.9 1011.9 996.3 DAY 28 19 12 27 28 30 25 20 6 7 8 6 MEAN QFF PRESSURE IN HPA 1017.5 1013.2 1011.6 1007.9 1003.8 995.8 992.6 995.7 1001.4 1009.2 1014.7 1017.3 1006.7 MAX. QFF PRESSURE IN HPA 1023.4 1019.0 1020.4 1012.5 1008.8 1004.0 996.9 999.4 1005.6 1013.2 1022.3 1021.7 1023.4 DAY 6 6 3 8 10 1 3 29 27 31 25 30 MIN. QFF PRESSURE IN HPA 1007.9 1006.7 1002.1 1002.9 996.5 990.4 990.5 992.9 996.0 1005.1 1009.0 1010.5 990.4 DAY 28 14 12 27 28 30 6 20 6 7 8 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 936.6 933.4 932.5 931.1 928.6 922.4 919.6 922.6 926.8 932.7 935.6 937.1 929.9 MAX. QFE PRESSURE IN HPA 942.5 938.4 938.7 936.5 932.7 929.8 923.1 925.1 930.0 936.2 941.9 941.4 942.5 DAY 6 5 2 7 10 1 3 28 26 30 25 29 MIN. QFE PRESSURE IN HPA 928.7 928.6 926.2 927.1 923.6 917.1 917.5 919.4 922.1 928.9 931.5 931.1 917.1 DAY 28 19 12 27 28 30 24 20 3 6 8 5 MEAN QNH PRESSURE IN HPA 1017.9 1014.4 1013.5 1012.0 1009.4 1002.7 999.7 1002.9 1007.4 1013.8 1016.8 1018.4 1010.7 MAX. QNH PRESSURE IN HPA 1024.2 1019.8 1020.1 1017.8 1013.7 1010.6 1003.4 1005.6 1010.8 1017.5 1023.6 1023.0 1024.2 DAY 6 5 2 7 10 1 3 28 26 30 25 29 MIN. QNH PRESSURE IN HPA 1009.4 1009.3 1006.8 1007.7 1004.0 997.0 997.5 999.5 1002.4 1009.7 1012.4 1012.0 997.0 DAY 28 19 12 27 28 30 24 20 3 6 8 5 MEAN QFF PRESSURE IN HPA 1018.2 1013.8 1012.1 1008.5 1004.1 996.0 992.8 995.9 1001.6 1009.3 1015.1 1017.9 1007.1 MAX. QFF PRESSURE IN HPA 1024.3 1019.7 1020.6 1013.5 1008.8 1004.3 996.3 999.2 1005.4 1013.5 1022.1 1023.1 1024.3 DAY 6 5 2 7 10 1 3 28 26 30 25 14 MIN. QFF PRESSURE IN HPA 1009.2 1008.9 1004.6 1003.3 998.0 990.4 990.7 991.7 995.4 1004.9 1009.8 1010.3 990.4 DAY 28 14 12 27 28 30 24 20 3 1 8 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 936.6 933.4 932.6 931.0 928.7 922.4 919.7 922.7 926.9 932.7 935.4 937.0 929.9 MAX. QFE PRESSURE IN HPA 942.5 938.2 939.5 936.6 932.8 929.8 923.1 925.1 930.8 936.0 940.5 941.1 942.5 DAY 6 6 2 7 10 1 3 29 26 29 25 29 MIN. QFE PRESSURE IN HPA 929.7 928.6 927.1 926.6 924.6 917.3 917.9 920.2 922.4 928.8 931.3 930.6 917.3 DAY 28 18 12 20 28 30 24 20 3 6 8 5 MEAN QNH PRESSURE IN HPA 1017.9 1014.4 1013.6 1011.9 1009.4 1002.7 999.8 1003.0 1007.5 1013.8 1016.6 1018.3 1010.7 MAX. QNH PRESSURE IN HPA 1024.2 1019.6 1021.0 1017.9 1013.8 1010.6 1003.4 1005.6 1011.7 1017.2 1022.1 1022.7 1024.2 DAY 6 6 2 7 10 1 3 29 26 29 25 29 MIN. QNH PRESSURE IN HPA 1010.5 1009.3 1007.7 1007.2 1005.1 997.2 997.9 1000.3 1002.7 1009.5 1012.2 1011.5 997.2 DAY 28 18 12 20 28 30 24 20 3 6 8 5 MEAN QFF PRESSURE IN HPA 1017.6 1013.4 1011.8 1008.1 1004.1 995.9 992.7 995.8 1001.4 1009.1 1014.4 1017.3 1006.8 MAX. QFF PRESSURE IN HPA 1023.9 1019.3 1021.1 1013.4 1008.8 1004.0 996.3 999.1 1005.7 1013.1 1020.0 1021.9 1023.9 DAY 6 6 2 7 10 1 3 29 26 30 25 14 MIN. QFF PRESSURE IN HPA 1010.2 1008.6 1004.9 1002.8 999.0 990.6 990.9 992.9 995.4 1004.8 1009.0 1009.8 990.6 DAY 28 19 12 20 28 30 6 20 3 1 8 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1985-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.4 12.0 15.4 22.0 29.2 33.5 35.5 34.9 31.1 25.4 17.7 12.6 23.3 MINIMUN AIR TEMPERATURE (C) 5.0 5.6 8.4 13.4 18.9 22.2 25.3 24.9 20.8 16.0 10.5 6.9 14.8 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.1 0.6 9.3 23.1 30.6 30.2 14.8 0.9 0.0 0.0 109.6 DAYS WITH MINIMUM TEMP. <=-4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 DAYS WITH FREEZING MIN.<= 0 1.9 1.2 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.3 4.0 TEMPERATURE RECORDS LOWEST(C) -4.0 -3.0 -1.0 3.0 7.5 16.0 18.5 16.0 15.0 7.5 0.0 -2.0 -4.0 YEAR-DAY 98-14 85- 7 85- 1 89- 1 85- 7 92-26 85-29 91-21 89-30 85-24 95-27 88-29 98-14 MAXIMUM AIR TEMPERATURE (C) 16.0 17.7 21.3 28.6 35.9 40.8 42.4 42.1 38.7 32.8 24.4 18.7 30.0 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.1 12.3 29.9 29.9 30.9 31.0 30.0 27.6 2.5 0.1 194.3 DAYS WITH MAXIMUM TEMP. <= 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 0.0 TEMPERATURE RECORDS HIGHEST(C) 25.5 27.0 30.8 38.6 43.2 48.0 48.0 48.0 46.0 39.6 34.0 30.0 48.0 YEAR-DAY 94- 1 87- 2 1-31 94-29 85-31 89-28 88-14 92-22 88- 9 96- 2 88- 4 98-10 89-28 DIF. BETWEEN (MAX.-MIN.) (C) 11.0 12.1 12.9 15.2 17.0 18.6 17.1 17.2 17.9 16.8 13.9 11.8 15.2 MEAN DAILY TEMP. (MDT) (C) 10.6 11.7 14.7 21.0 27.3 31.4 33.8 33.5 29.7 24.4 17.4 12.8 22.4 STANDARD DEVIATION OF MDT(C) 1.26 1.10 1.26 1.71 1.19 0.76 0.62 0.77 0.51 0.94 0.91 1.62 1.05 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.4 39.1 177.8 278.0 354.5 367.2 247.1 104.5 3.3 0.0 1571.9 HEATING DEG. DAYS(BASE 18 0C) 220.1 171.5 95.7 10.2 0.0 0.0 0.0 0.0 0.0 0.1 42.6 162.5 702.7 DEWPOINT (MEAN C) 4.0 3.3 5.3 6.4 4.0 3.6 6.9 8.2 5.1 4.3 5.0 5.0 5.1 MIXING RATIO (G/KG) 5.65 5.51 6.30 6.84 5.88 5.69 7.20 7.97 6.48 5.92 6.24 6.17 6.32 VAPOUR PRESSURE (HPA) 8.41 8.19 9.33 10.10 8.67 8.35 10.51 11.64 9.54 8.77 9.27 9.18 9.33 SATURATION DEF. (HPA) 4.76 6.42 8.98 18.02 34.33 46.17 49.90 46.69 38.02 25.52 12.06 6.07 24.74 RELATIVE HUMIDITY (MEAN %) 69 61 57 42 24 18 20 23 23 30 49 66 40 RELATIVE HUMIDITY (MAX. %) 90 84 81 68 43 32 34 39 42 50 72 86 60 RELATIVE HUMIDITY (MIN. %) 46 38 35 24 13 10 11 12 11 16 29 43 24 RELATIVE HUMIDITY (MEAN% 03UTC) 87 82 78 66 42 32 33 38 40 48 68 82 58 RELATIVE HUMIDITY (MEAN% 09UTC) 53 46 42 30 16 11 13 14 13 19 35 49 28 RELATIVE HUMIDITY (MEAN% 15UTC) 64 52 47 32 17 12 15 18 18 24 44 62 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 103.7 67.0 78.6 28.1 4.4 0.1 0.0 4.6 1.4 5.3 54.2 117.7 465.1 DAYS WITH PRECIPITATION >=10 3.3 2.4 2.9 0.9 0.2 0.0 0.0 0.2 0.1 0.2 1.7 3.4 15.3 DAYS WITH PRECIPITATION >= 5 4.6 3.6 4.6 1.7 0.3 0.0 0.0 0.2 0.2 0.4 2.7 4.9 23.2 DAYS WITH PRECIPITATION >= 1 6.9 5.8 7.3 3.4 0.8 0.1 0.0 0.7 0.2 0.8 3.9 7.3 37.2 DAYS WITH PRECIPITATION 8.1 6.9 8.1 4.4 1.3 0.2 0.2 0.8 0.3 1.4 4.6 8.3 44.6 GREATEST DAILY PRECIPITATION 138.0 104.0 64.0 40.0 17.0 1.0 0.8 27.0 12.0 22.0 109.0 117.0 138.0 YEAR-DAY 98- 5 95- 5 97-29 86-11 86- 4 97- 1 2-31 98-25 96- 1 94-18 94-17 91-13 98 DAY WITH THUNDER STORM 1.6 1.9 2.6 2.0 1.2 0.3 0.2 0.9 0.3 0.7 2.2 3.0 16.9 DAYS WITH SNOW OR SLEET 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 DAYS WITH DUST 0.4 0.4 1.1 1.3 2.4 2.2 4.3 1.8 1.7 0.9 0.2 0.1 16.8 WIND DIRECTION (PREVAILING) 135 270 270 270 270 270 270 270 270 270 270 135 270 PREVAILING WIND SPEED(KNOTS) 9.3 9.2 9.7 10.0 10.6 10.6 10.5 10.9 10.6 9.6 8.9 9.2 10.1 PREVAILING WIND PERCENT 15.4 14.2 14.6 20.3 26.7 31.3 31.3 28.2 28.4 22.2 12.0 11.5 20.7 CALMS PERCENT OF WIND 65.8 58.1 59.2 56.1 51.3 52.6 53.0 56.6 59.4 63.3 68.7 71.5 59.6 NO. OF WIND OBSERVATION 206.7 188.1 206.7 199.7 205.5 202.1 208.8 208.8 202.0 208.8 205.0 211.8 2454.0 VECTOR WIND DIRECTION (MEAN) 155 186 205 247 273 274 265 264 267 261 203 160 252 VECTOR WIND MAGNITUDE(KNOTS) 1.4 1.3 1.1 1.7 3.3 4.1 3.4 3.2 3.3 2.3 0.9 1.1 1.8 WIND STEADINESES (MEAN %) 45.2 32.5 27.5 38.6 63.5 78.8 68.0 65.3 75.0 63.9 30.0 42.3 43.9 WIND SPEED (MEAN KNOTS) 3.1 4.0 4.0 4.4 5.2 5.2 5.0 4.9 4.4 3.6 3.0 2.6 4.1 FASTEST WIND DIRECTION 120 100 270 180 290 100 120 350 30 330 300 120 330 FASTEST WIND SPEED (KNOTS) 29 39 49 31 31 39 39 60 35 87 39 23 87 YEAR-DAY 92-30 91-20 91- 3 3-16 2-26 91-23 96-27 86-28 94-10 91- 1 88-20 95-11 91 DAYS WITH SKY CLEAR (0-2)/8 14.6 14.9 14.6 13.8 21.3 28.8 28.7 28.4 29.4 25.6 18.3 15.8 254.2 DAYS WITH P.CLOUDY (3-6)/8 9.5 7.6 9.4 11.4 7.4 1.1 2.2 2.6 0.6 4.6 7.9 8.4 72.7 DAYS WITH CLOUDY (7-8)/8 6.9 5.7 7.0 4.7 2.3 0.1 0.1 0.1 0.0 0.8 3.8 6.8 38.3 DAYS WITH VISIBILITY =< 2 KM 7.2 2.5 2.2 0.4 0.6 0.4 0.8 0.3 0.3 0.2 1.2 5.9 22.0 DURATION OF SUNSHINE HOURS 191.3 197.7 222.0 256.3 321.0 361.2 349.7 340.1 314.6 288.8 222.0 197.4 3262.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1985-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 935.1 933.6 931.7 930.3 927.5 922.3 919.8 921.9 926.6 932.0 934.9 936.0 929.3 MAX. QFE PRESSURE IN HPA 943.0 943.2 940.5 938.6 934.5 930.4 927.8 929.9 935.9 940.4 943.5 943.4 943.5 YEAR-DAY 3- 6 2- 1 2-11 98-12 3-10 86- 2 96- 3 96-27 94-24 94-18 3-25 2-14 3-25 MIN. QFE PRESSURE IN HPA 921.4 925.2 921.5 923.3 919.1 915.3 913.4 915.1 919.2 925.2 927.1 926.1 913.4 YEAR-DAY 96-12 85-26 99- 2 88-25 90-12 91-19 95-20 95- 3 0- 1 89-11 90- 1 0-10 95-20 MEAN QNH PRESSURE IN HPA 1016.3 1014.7 1012.7 1011.1 1008.1 1002.6 999.9 1002.1 1007.2 1013.0 1016.0 1017.2 1010.1 MAX. QNH PRESSURE IN HPA 1024.7 1025.0 1022.1 1020.0 1015.6 1011.3 1008.5 1010.7 1017.1 1022.0 1025.3 1025.2 1025.3 YEAR-DAY 3- 6 2- 1 2-11 98-12 3-10 86- 2 96- 3 96-27 94-24 94-18 3-25 2-14 3-25 MIN. QNH PRESSURE IN HPA 1001.6 1005.7 1001.7 1003.7 999.2 995.1 993.1 994.9 999.3 1005.7 1007.7 1006.7 993.1 YEAR-DAY 96-12 85-26 99- 2 88-25 90-12 91-19 95-20 95- 3 0- 1 89-11 90- 1 0-10 95-20 MEAN QFF PRESSURE IN HPA 1016.5 1014.6 1011.6 1008.1 1003.2 996.5 993.1 995.7 1001.8 1009.1 1014.2 1017.2 1006.8 MAX. QFF PRESSURE IN HPA 1025.2 1026.4 1021.7 1018.4 1011.8 1005.5 1001.6 1006.0 1012.3 1018.5 1024.1 1025.2 1026.4 YEAR-DAY 94-28 2- 1 3- 3 97-13 94- 8 97- 8 96- 3 96-27 94-24 94-18 3-25 2-30 2- 1 MIN. QFF PRESSURE IN HPA 1001.4 1005.3 1000.1 999.7 994.7 989.2 986.1 987.8 993.7 1000.7 1005.8 1005.0 986.1 YEAR-DAY 96-12 94-12 99- 2 94-30 1-25 97-29 95-20 95- 3 0- 1 96- 4 99- 1 0-10 95-20 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 935.0 933.8 931.7 930.1 927.4 922.3 919.6 921.9 926.4 931.9 934.7 936.3 929.2 MAX. QFE PRESSURE IN HPA 942.5 941.4 939.9 936.3 934.0 929.0 926.0 927.2 934.7 936.8 941.6 941.5 942.5 YEAR-DAY 3- 7 2- 2 2-12 97-13 94- 8 97- 8 96- 3 99-19 94-24 95-25 96-16 2-14 3- 7 MIN. QFE PRESSURE IN HPA 921.8 926.2 921.5 924.2 921.0 916.4 914.8 916.6 919.8 926.7 929.3 928.6 914.8 YEAR-DAY 96-12 96- 5 99- 2 98-23 1-26 97-29 95-20 95- 9 0- 2 96- 5 1-18 94- 4 95-20 MEAN QNH PRESSURE IN HPA 1016.2 1014.8 1012.7 1011.0 1008.0 1002.6 999.7 1002.1 1007.0 1012.8 1015.8 1017.6 1010.0 MAX. QNH PRESSURE IN HPA 1024.2 1023.0 1021.4 1017.6 1015.1 1009.8 1006.5 1007.8 1015.9 1018.1 1023.2 1023.1 1024.2 YEAR-DAY 3- 7 2- 2 2-12 97-13 94- 8 97- 8 96- 3 99-19 94-24 95-25 96-16 2-14 3- 7 MIN. QNH PRESSURE IN HPA 1002.1 1006.8 1001.7 1004.6 1001.2 996.3 994.6 996.5 999.9 1007.3 1010.1 1009.3 994.6 YEAR-DAY 96-12 96- 5 99- 2 98-23 1-26 97-29 95-20 95- 9 0- 2 96- 5 1-18 94- 4 95-20 MEAN QFF PRESSURE IN HPA 1015.9 1014.1 1011.2 1007.6 1002.9 996.3 992.8 995.2 1001.2 1008.5 1013.6 1016.7 1006.3 MAX. QFF PRESSURE IN HPA 1023.9 1023.8 1020.3 1017.3 1011.4 1004.0 999.8 1001.1 1010.7 1014.8 1021.0 1023.4 1023.9 YEAR-DAY 3- 7 2- 2 97- 1 97-13 94- 8 3- 1 96- 3 99-19 94-24 95-25 1-21 94- 6 3- 7 MIN. QFF PRESSURE IN HPA 1001.9 1005.3 1000.1 1000.2 995.2 989.2 987.2 988.8 994.4 1002.0 1005.8 1008.5 987.2 YEAR-DAY 96-12 94-12 99- 2 98-23 1-29 97-29 0-10 95- 9 0- 2 98- 1 99- 1 94- 4 0-10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 935.0 933.6 931.7 930.4 927.7 922.7 920.1 922.1 926.8 932.2 934.9 935.9 929.4 MAX. QFE PRESSURE IN HPA 942.5 941.8 939.8 937.9 933.8 929.7 927.0 927.1 935.1 937.4 941.7 942.3 942.5 YEAR-DAY 3- 7 91-16 2-12 89- 1 94- 8 97- 8 96- 3 2-29 94-24 94-18 3-25 2-14 3- 7 MIN. QFE PRESSURE IN HPA 921.4 925.6 922.8 924.2 921.1 916.5 915.0 917.2 920.4 925.9 928.3 927.3 915.0 YEAR-DAY 96-12 88-17 99- 2 90-16 90-30 86-25 95-20 86- 5 94- 1 90- 1 90- 2 88-26 95-20 MEAN QNH PRESSURE IN HPA 1016.2 1014.6 1012.6 1011.2 1008.3 1003.0 1000.2 1002.4 1007.4 1013.2 1016.1 1017.1 1010.2 MAX. QNH PRESSURE IN HPA 1024.2 1023.5 1021.3 1019.3 1014.9 1010.5 1007.6 1007.7 1016.3 1018.7 1023.3 1024.0 1024.2 YEAR-DAY 3- 7 91-16 2-12 89- 1 94- 8 97- 8 96- 3 2-29 94-24 94-18 3-25 2-14 3- 7 MIN. QNH PRESSURE IN HPA 1001.6 1006.1 1003.1 1004.6 1001.3 996.4 994.8 997.1 1000.6 1006.4 1009.0 1007.9 994.8 YEAR-DAY 96-12 88-17 99- 2 90-16 90-30 86-25 95-20 86- 5 94- 1 90- 1 90- 2 88-26 95-20 MEAN QFF PRESSURE IN HPA 1016.6 1014.6 1011.6 1008.4 1003.7 997.3 993.8 996.2 1002.3 1009.6 1014.5 1016.9 1007.1 MAX. QFF PRESSURE IN HPA 1024.8 1024.7 1021.3 1019.7 1011.8 1005.5 1001.3 1002.4 1012.3 1015.9 1022.8 1025.5 1025.5 YEAR-DAY 3- 7 2- 2 97- 1 89- 1 94- 8 97- 8 96- 3 2-29 94-24 95-24 3-25 88-29 88-29 MIN. QFF PRESSURE IN HPA 1001.4 1005.1 1000.3 1000.8 996.0 990.7 988.0 990.3 995.1 1001.9 1006.5 1006.4 988.0 YEAR-DAY 96-12 85-26 1-25 90-16 90-21 97-29 95-20 86- 5 94- 1 90- 1 90- 2 85-19 95-20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1985-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 936.3 934.7 932.9 931.4 928.6 923.3 920.7 922.9 927.8 933.4 936.2 937.2 930.4 MAX. QFE PRESSURE IN HPA 943.0 943.2 940.4 938.6 934.5 930.4 927.8 928.4 935.9 940.4 943.5 943.4 943.5 YEAR-DAY 3- 6 2- 1 3- 3 98-12 3-11 86- 2 96- 3 99-19 94-24 94-18 3-25 2-14 3-25 MIN. QFE PRESSURE IN HPA 922.3 925.7 924.3 924.8 920.9 916.7 915.3 917.5 920.9 927.1 929.7 927.7 915.3 YEAR-DAY 96-12 85-26 97-29 2- 3 90-12 86-25 95-21 94- 1 0- 1 88- 1 90- 1 88-26 95-21 MEAN QNH PRESSURE IN HPA 1017.5 1015.9 1013.9 1012.3 1009.3 1003.7 1000.9 1003.3 1008.5 1014.4 1017.4 1018.5 1011.3 MAX. QNH PRESSURE IN HPA 1024.7 1025.0 1022.0 1020.0 1015.6 1011.3 1008.5 1009.1 1017.1 1022.0 1025.3 1025.2 1025.3 YEAR-DAY 3- 6 2- 1 3- 3 98-12 3-11 86- 2 96- 3 99-19 94-24 94-18 3-25 2-14 3-25 MIN. QNH PRESSURE IN HPA 1002.6 1006.2 1004.7 1005.3 1001.1 996.6 995.1 997.5 1001.1 1007.7 1010.5 1008.4 995.1 YEAR-DAY 96-12 85-26 97-29 2- 3 90-12 86-25 95-21 94- 1 0- 1 88- 1 90- 1 88-26 95-21 MEAN QFF PRESSURE IN HPA 1017.9 1016.0 1012.9 1009.3 1004.2 997.3 993.9 996.7 1002.9 1010.5 1015.7 1018.8 1008.0 MAX. QFF PRESSURE IN HPA 1025.2 1026.4 1021.7 1018.4 1011.6 1004.8 1001.6 1002.2 1012.3 1018.5 1024.1 1025.2 1026.4 YEAR-DAY 94-28 2- 1 3- 3 97-13 94- 8 3- 1 96- 3 2-29 94-24 94-18 3-25 2-30 2- 1 MIN. QFF PRESSURE IN HPA 1002.7 1007.2 1003.8 1001.2 995.8 990.3 987.8 990.6 995.3 1003.1 1008.5 1008.9 987.8 YEAR-DAY 96-12 1-21 1-25 98-21 1-29 97-29 95-21 94- 1 94- 1 96- 4 99- 1 3- 6 95-21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 935.7 934.3 932.4 931.0 928.1 922.9 920.2 922.3 927.1 932.5 935.3 936.4 929.8 MAX. QFE PRESSURE IN HPA 942.8 943.0 939.9 937.5 934.5 930.0 927.4 927.6 934.7 938.4 942.1 942.1 943.0 YEAR-DAY 94-28 2- 1 3- 3 89- 1 3-10 86- 2 96- 3 99-19 94-24 89-27 3-25 2-14 2- 1 MIN. QFE PRESSURE IN HPA 922.3 926.4 923.9 925.2 920.0 916.9 914.3 917.2 920.1 926.5 929.1 926.9 914.3 YEAR-DAY 96-12 85-26 3-12 2- 3 90-12 86-25 95-20 94- 1 0- 1 88- 1 90- 1 88-26 95-20 MEAN QNH PRESSURE IN HPA 1016.9 1015.4 1013.5 1011.9 1008.8 1003.2 1000.4 1002.6 1007.7 1013.5 1016.5 1017.6 1010.7 MAX. QNH PRESSURE IN HPA 1024.5 1024.7 1021.4 1018.9 1015.6 1010.8 1008.0 1008.3 1015.9 1019.8 1023.8 1023.8 1024.7 YEAR-DAY 94-28 2- 1 3- 3 89- 1 3-10 86- 2 96- 3 99-19 94-24 89-27 3-25 2-14 2- 1 MIN. QNH PRESSURE IN HPA 1002.6 1007.0 1004.3 1005.7 1000.1 996.8 994.0 997.1 1000.2 1007.1 1009.9 1007.5 994.0 YEAR-DAY 96-12 85-26 3-12 2- 3 90-12 86-25 95-20 94- 1 0- 1 88- 1 90- 1 88-26 95-20 MEAN QFF PRESSURE IN HPA 1016.7 1015.0 1012.1 1008.6 1003.6 996.8 993.3 995.8 1001.9 1009.2 1014.3 1017.3 1007.0 MAX. QFF PRESSURE IN HPA 1025.1 1025.6 1021.0 1017.5 1011.2 1004.6 1001.1 1001.3 1010.8 1015.7 1021.9 1024.0 1025.6 YEAR-DAY 94-28 2- 1 3- 3 97-12 3-10 95- 1 96- 3 2-30 94-24 93-30 3-25 94- 6 2- 1 MIN. QFF PRESSURE IN HPA 1002.6 1007.3 1001.3 1001.0 995.2 990.3 986.3 989.5 994.2 1001.8 1007.6 1009.0 986.3 YEAR-DAY 96-12 3-14 3-12 98-21 1-29 97-29 95-21 95- 3 0- 1 96- 4 95- 6 3- 6 95-21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 934.2 932.7 930.9 929.6 926.8 921.8 919.1 921.1 925.7 931.0 933.9 935.0 928.5 MAX. QFE PRESSURE IN HPA 940.5 941.2 938.6 936.0 932.6 929.0 926.1 926.3 933.2 936.4 940.2 941.1 941.2 YEAR-DAY 3- 6 2- 1 3- 3 95-12 94-14 95- 2 96- 3 2-29 94-23 94-18 3-25 2-14 2- 1 MIN. QFE PRESSURE IN HPA 922.2 925.2 923.0 923.9 919.1 915.3 913.4 915.1 919.2 925.2 927.1 926.3 913.4 YEAR-DAY 96-12 85-26 1-25 88-25 90-12 91-19 95-20 95- 3 0- 1 89-11 90- 1 88-26 95-20 MEAN QNH PRESSURE IN HPA 1015.3 1013.7 1011.8 1010.4 1007.4 1002.0 999.2 1001.3 1006.2 1011.9 1015.0 1016.2 1009.2 MAX. QNH PRESSURE IN HPA 1022.1 1022.8 1020.0 1017.2 1013.6 1009.8 1006.7 1006.9 1014.3 1017.7 1021.7 1022.7 1022.8 YEAR-DAY 3- 6 2- 1 3- 3 95-12 94-14 95- 2 96- 3 2-29 94-23 94-18 3-25 2-14 2- 1 MIN. QNH PRESSURE IN HPA 1002.5 1005.7 1003.3 1004.3 999.2 995.1 993.1 994.9 999.3 1005.7 1007.7 1006.9 993.1 YEAR-DAY 96-12 85-26 1-25 88-25 90-12 91-19 95-20 95- 3 0- 1 89-11 90- 1 88-26 95-20 MEAN QFF PRESSURE IN HPA 1015.2 1013.4 1010.7 1007.4 1002.6 996.0 992.5 994.8 1000.8 1007.9 1013.1 1015.9 1005.9 MAX. QFF PRESSURE IN HPA 1022.0 1023.6 1019.7 1015.9 1009.3 1004.6 999.8 1001.0 1009.5 1014.4 1020.2 1022.9 1023.6 YEAR-DAY 94-28 2- 1 3- 3 97-12 97- 6 95- 2 96- 3 2-29 94-23 94-19 3-25 94- 6 2- 1 MIN. QFF PRESSURE IN HPA 1002.6 1005.7 1000.7 999.7 994.7 989.2 986.1 987.8 993.7 1000.7 1006.4 1007.6 986.1 YEAR-DAY 96-12 1-21 1-25 94-30 1-29 97-29 95-20 95- 3 0- 1 96- 4 95- 6 94- 3 95-20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1985-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 934.6 932.9 930.9 929.3 926.5 921.4 918.8 921.0 925.7 931.3 934.3 935.5 928.5 MAX. QFE PRESSURE IN HPA 941.3 941.8 938.8 935.6 932.3 929.0 925.2 929.9 933.7 936.5 941.3 940.7 941.8 YEAR-DAY 3- 6 2- 1 3- 3 94-16 92-24 95- 2 96- 3 96-27 94-23 95-24 3-25 0-17 2- 1 MIN. QFE PRESSURE IN HPA 924.9 925.8 922.5 923.3 919.9 915.3 913.6 915.5 919.2 926.0 927.6 926.7 913.6 YEAR-DAY 91-25 91-28 86- 7 88-25 1-25 91-19 95-21 88- 2 0- 1 89-10 90- 1 88-26 95-21 MEAN QNH PRESSURE IN HPA 1015.7 1013.9 1011.8 1010.1 1007.0 1001.6 998.9 1001.2 1006.2 1012.2 1015.4 1016.7 1009.2 MAX. QNH PRESSURE IN HPA 1022.9 1023.5 1020.2 1016.8 1013.3 1009.8 1005.7 1010.7 1014.8 1017.8 1022.9 1022.3 1023.5 YEAR-DAY 3- 6 2- 1 3- 3 94-16 92-24 95- 2 96- 3 96-27 94-23 95-24 3-25 0-17 2- 1 MIN. QNH PRESSURE IN HPA 1005.4 1006.3 1002.8 1003.7 1000.0 995.1 993.3 995.3 999.3 1006.5 1008.3 1007.3 993.3 YEAR-DAY 91-25 91-28 86- 7 88-25 1-25 91-19 95-21 88- 2 0- 1 89-10 90- 1 88-26 95-21 MEAN QFF PRESSURE IN HPA 1016.1 1013.9 1010.8 1007.3 1002.4 995.9 992.5 995.0 1001.2 1008.7 1013.8 1016.5 1006.2 MAX. QFF PRESSURE IN HPA 1025.1 1024.8 1020.5 1016.2 1009.6 1004.8 999.2 1006.0 1010.7 1015.3 1022.3 1023.8 1025.1 YEAR-DAY 92- 5 2- 1 85- 9 97-12 97- 6 95- 2 92- 6 96-27 94-23 95-24 3-25 88-29 92- 5 MIN. QFF PRESSURE IN HPA 1005.9 1004.4 1001.6 1000.0 995.0 989.1 986.5 988.6 994.6 1002.0 1005.8 1006.0 986.5 YEAR-DAY 91-25 91-28 1-25 88-25 90-30 91-19 95-20 88- 2 90- 5 96- 4 90- 1 94- 3 95-20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 935.6 934.1 932.2 930.5 927.7 922.6 920.0 922.4 927.1 932.5 935.2 936.8 929.7 MAX. QFE PRESSURE IN HPA 942.5 942.3 940.2 936.5 932.7 929.8 926.6 927.5 934.7 937.7 942.0 941.9 942.5 YEAR-DAY 3- 6 2- 1 2-11 3- 7 94- 7 3- 1 96- 3 98-25 94-23 95-24 96-15 2-13 3- 6 MIN. QFE PRESSURE IN HPA 924.9 926.0 925.0 924.6 920.6 916.7 915.2 916.9 920.0 927.0 929.8 927.9 915.2 YEAR-DAY 96-11 96- 4 1-25 99- 7 1-25 97-29 95-20 95- 8 0- 1 96- 4 1-11 94- 3 95-20 MEAN QNH PRESSURE IN HPA 1016.8 1015.3 1013.2 1011.4 1008.4 1002.9 1000.1 1002.7 1007.7 1013.5 1016.4 1018.1 1010.5 MAX. QNH PRESSURE IN HPA 1024.2 1024.0 1021.7 1017.8 1013.7 1010.6 1007.2 1008.2 1015.9 1019.1 1023.7 1023.6 1024.2 YEAR-DAY 3- 6 2- 1 2-11 3- 7 94- 7 3- 1 96- 3 98-25 94-23 95-24 96-15 2-13 3- 6 MIN. QNH PRESSURE IN HPA 1005.4 1006.5 1005.5 1005.1 1000.8 996.6 995.0 996.8 1000.1 1007.6 1010.6 1008.6 995.0 YEAR-DAY 96-11 96- 4 1-25 99- 7 1-25 97-29 95-20 95- 8 0- 1 96- 4 1-11 94- 3 95-20 MEAN QFF PRESSURE IN HPA 1016.9 1014.8 1011.7 1008.0 1003.0 996.3 993.1 995.7 1001.9 1009.3 1014.5 1017.6 1006.9 MAX. QFF PRESSURE IN HPA 1024.3 1025.2 1020.6 1017.0 1010.1 1004.3 1000.0 1002.2 1011.1 1015.8 1022.1 1024.0 1025.2 YEAR-DAY 3- 6 2- 1 3- 2 97-12 94- 7 3- 1 96- 3 96-27 94-23 95-24 3-25 0-17 2- 1 MIN. QFF PRESSURE IN HPA 1005.4 1005.7 1003.6 1001.0 994.7 989.2 987.7 989.5 994.5 1002.4 1007.6 1006.9 987.7 YEAR-DAY 96-11 96- 4 1-24 99- 7 1-25 97-29 94-14 95- 8 0- 1 96- 4 2- 6 94- 3 94-14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 935.4 934.1 932.2 930.5 927.7 922.5 920.0 922.4 927.0 932.3 935.1 936.6 929.7 MAX. QFE PRESSURE IN HPA 942.5 941.8 940.5 936.6 933.8 929.8 926.0 928.0 934.7 937.0 941.6 941.7 942.5 YEAR-DAY 3- 6 2- 1 2-11 3- 7 94- 7 97- 7 96- 2 99-18 94-23 95-24 96-15 2-13 3- 6 MIN. QFE PRESSURE IN HPA 923.4 925.8 923.5 924.8 921.0 916.7 915.2 916.9 920.3 926.6 929.6 926.1 915.2 YEAR-DAY 96-11 99- 5 97-24 98-22 1-25 97-29 0- 9 95- 3 0- 1 96- 4 1-11 0-10 0- 9 MEAN QNH PRESSURE IN HPA 1016.6 1015.2 1013.2 1011.4 1008.4 1002.8 1000.2 1002.7 1007.6 1013.3 1016.3 1017.9 1010.5 MAX. QNH PRESSURE IN HPA 1024.2 1023.5 1022.1 1017.9 1014.9 1010.6 1006.5 1008.7 1015.9 1018.3 1023.2 1023.3 1024.2 YEAR-DAY 3- 6 2- 1 2-11 3- 7 94- 7 97- 7 96- 2 99-18 94-23 95-24 96-15 2-13 3- 6 MIN. QNH PRESSURE IN HPA 1003.8 1006.3 1003.9 1005.3 1001.2 996.6 995.0 996.8 1000.5 1007.2 1010.4 1006.7 995.0 YEAR-DAY 96-11 99- 5 97-24 98-22 1-25 97-29 0- 9 95- 3 0- 1 96- 4 1-11 0-10 0- 9 MEAN QFF PRESSURE IN HPA 1016.3 1014.4 1011.5 1007.8 1002.9 996.2 993.0 995.5 1001.5 1008.8 1014.0 1016.9 1006.6 MAX. QFF PRESSURE IN HPA 1023.9 1024.2 1021.1 1017.3 1011.2 1004.4 999.4 1001.7 1010.6 1014.8 1021.0 1023.8 1024.2 YEAR-DAY 3- 6 2- 1 3- 2 97-12 94- 7 97- 7 96- 2 98-25 94-23 94-18 1-20 94- 5 2- 1 MIN. QFF PRESSURE IN HPA 1003.6 1005.4 1002.0 1000.4 995.1 989.5 987.1 989.0 994.3 1001.8 1007.9 1005.0 987.1 YEAR-DAY 96-11 99- 5 97-24 98-22 1-25 97-28 0- 9 95- 8 0- 1 96- 4 1-17 0-10 0- 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1985 13.3 11.9 16.5 23.8 30.6 34.9 36.3 36.1 32.4 25.4 19.4 12.4 24.4 1986 11.6 12.5 15.5 21.4 30.0 33.5 37.7 35.8 32.4 27.8 16.5 11.5 23.8 1987 12.6 14.6 15.5 23.2 32.2 35.0 37.1 35.4 32.8 25.7 20.3 13.5 24.8 1988 10.0 13.0 17.1 23.1 31.2 34.3 36.3 35.7 32.7 27.3 19.0 13.6 24.4 1989 9.0 10.7 16.4 22.4 29.8 34.9 37.5 36.0 31.2 26.7 18.2 12.1 23.8 1990 9.7 11.6 17.0 23.2 32.1 35.4 37.0 35.9 32.6 26.6 20.1 14.6 24.6 1991 11.6 12.0 16.0 23.3 28.1 34.3 35.6 35.2 31.3 25.3 19.3 12.7 23.7 1992 7.4 10.1 12.9 19.8 27.6 33.5 36.0 35.0 32.3 25.8 ***** ***** ****** 1993 ***** ***** ***** ***** 28.7 32.0 34.7 34.0 30.3 24.4 17.0 13.2 ****** 1994 11.5 11.6 15.8 22.8 27.5 32.6 34.2 33.4 29.7 24.0 16.6 9.2 22.4 1995 10.8 11.2 13.8 18.6 27.1 31.8 33.5 34.5 29.5 23.5 16.9 10.4 21.8 1996 9.9 12.8 14.1 20.2 28.6 32.2 35.4 34.2 30.2 23.6 16.9 13.2 22.6 1997 10.5 10.9 13.0 18.6 26.5 32.6 34.2 33.6 30.0 24.8 15.6 11.3 21.8 1998 8.7 11.4 13.9 21.1 28.7 34.3 35.6 35.0 31.1 24.8 19.0 16.1 23.3 1999 11.3 13.3 14.4 22.7 29.7 33.7 34.4 35.1 30.3 25.6 17.2 12.9 23.4 2000 10.3 11.6 15.9 25.2 29.9 32.8 35.6 34.9 29.6 24.5 15.5 12.3 23.2 2001 9.7 11.7 17.0 23.8 29.9 33.2 34.6 34.7 30.6 25.8 16.5 13.8 23.4 2002 10.1 11.8 16.7 20.5 29.0 32.4 34.6 34.1 30.4 25.6 17.2 11.7 22.8 2003 10.1 12.7 15.0 22.2 28.0 33.3 34.5 34.3 30.5 25.3 16.5 12.5 22.9 MEAN 10.4 12.0 15.4 22.0 29.2 33.5 35.5 34.9 31.1 25.4 17.7 12.6 23.3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1985 7.0 3.3 7.5 12.7 15.9 21.0 23.5 23.5 19.5 12.7 11.0 6.1 13.6 1986 3.4 5.3 7.5 12.7 18.4 20.2 25.2 24.4 20.3 16.4 10.2 5.1 14.1 1987 3.5 5.6 8.1 11.5 19.4 21.5 23.9 23.9 20.4 16.7 9.7 6.0 14.2 1988 4.1 ***** ***** 14.8 18.8 21.8 25.4 24.1 20.8 16.2 10.4 6.9 ****** 1989 ***** 4.4 8.9 12.7 ***** ***** ***** 24.8 20.4 15.6 11.8 6.8 ****** 1990 4.9 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 6.5 ****** 1991 6.9 5.7 9.9 13.3 16.9 21.5 23.6 22.9 19.9 16.3 10.4 8.1 14.6 1992 2.7 4.5 6.1 11.2 17.9 22.0 24.2 23.2 19.6 12.9 ***** ***** ****** 1993 ***** ***** ***** ***** 18.8 21.4 25.3 25.2 21.4 16.7 11.4 6.4 ****** 1994 5.4 4.8 9.7 15.1 18.7 22.7 25.5 24.6 21.6 16.9 12.1 4.4 15.1 1995 5.8 6.2 7.7 11.2 17.8 21.2 24.8 25.1 20.1 14.6 9.0 6.1 14.1 1996 5.6 8.1 9.0 12.6 19.9 21.7 26.5 25.7 21.0 15.3 10.2 7.1 15.2 1997 5.1 4.3 7.5 12.3 17.7 23.0 25.2 24.6 20.1 17.7 11.0 7.2 14.6 1998 4.5 6.4 8.8 12.8 19.7 24.3 27.0 26.4 22.2 15.8 10.4 8.1 15.5 1999 6.9 8.5 8.5 15.0 20.2 23.5 25.9 27.0 21.2 17.0 10.6 6.3 15.9 2000 5.4 5.2 8.3 16.5 20.4 23.1 26.8 26.8 20.6 16.6 10.5 7.5 15.6 2001 4.1 4.7 8.8 14.6 20.7 23.1 25.6 26.3 21.8 17.5 9.6 9.9 15.6 2002 5.7 5.9 9.8 13.8 20.2 22.7 25.6 24.8 21.6 16.9 10.7 7.3 15.4 2003 4.9 7.3 8.3 14.9 19.5 23.4 25.6 25.7 21.0 16.7 9.3 8.0 15.4 MEAN 5.0 5.6 8.4 13.4 18.9 22.2 25.3 24.9 20.8 16.0 10.5 6.9 14.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1985 18.1 17.7 22.3 29.8 36.5 41.6 42.9 42.4 39.6 32.5 25.0 17.0 30.4 1986 17.5 17.3 20.6 26.5 35.8 40.0 44.1 42.8 39.2 34.4 21.3 16.7 29.7 1987 19.6 20.8 20.5 29.3 38.4 41.6 43.3 41.8 39.4 31.3 27.2 18.8 31.0 1988 15.3 18.3 22.7 29.4 37.7 40.6 42.3 41.8 39.8 34.3 25.7 19.2 30.6 1989 14.6 16.3 21.7 28.4 35.7 41.4 43.2 42.2 37.7 33.7 22.9 16.8 29.6 1990 13.8 16.3 23.0 29.3 38.3 42.1 42.7 42.0 39.5 33.3 27.5 20.9 30.7 1991 16.0 17.1 20.7 29.3 33.8 40.5 42.4 41.6 38.1 31.5 25.4 17.1 29.5 1992 11.8 14.7 17.8 25.9 33.8 39.6 42.6 41.7 38.9 32.7 ***** ***** ****** 1993 ***** ***** ***** ***** 34.2 40.1 42.6 42.0 38.8 31.9 24.4 21.8 ****** 1994 18.5 18.2 22.3 30.1 34.5 40.4 41.0 41.2 37.0 31.0 22.2 14.9 29.3 1995 16.9 16.5 20.1 26.1 35.2 39.7 41.2 43.2 37.8 32.1 25.7 16.2 29.2 1996 15.2 18.5 19.6 27.4 36.0 40.7 42.9 42.3 39.1 31.8 24.6 20.8 29.9 1997 16.8 18.1 18.6 25.0 34.0 40.0 41.7 41.3 38.5 31.7 21.2 16.6 28.6 1998 13.7 16.9 19.4 28.2 35.9 42.0 42.7 42.7 39.0 33.4 28.2 25.8 30.7 1999 16.5 18.5 20.3 29.4 37.3 41.5 41.5 42.7 38.7 34.0 24.7 21.3 30.5 2000 16.0 17.8 22.4 32.8 37.3 40.2 43.0 42.4 37.5 32.2 21.5 17.9 30.1 2001 16.7 18.9 24.8 31.8 36.9 40.8 41.7 42.2 38.2 33.9 24.4 18.7 30.8 2002 15.5 18.0 23.6 26.6 36.4 40.1 42.0 42.0 39.0 34.2 24.0 17.2 29.9 2003 16.0 18.5 22.0 29.7 35.1 41.2 41.9 42.4 39.1 33.9 24.3 18.2 30.2 MEAN 16.0 17.7 21.3 28.6 35.9 40.8 42.4 42.1 38.7 32.8 24.4 18.7 30.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1985 11.1 14.4 14.8 17.1 20.6 20.6 19.4 18.9 20.1 19.8 14.0 10.9 16.8 1986 14.1 12.0 13.1 13.8 17.4 19.8 18.9 18.4 18.9 18.0 11.1 11.6 15.6 1987 16.1 15.2 12.4 17.8 19.0 20.1 19.4 17.9 19.0 14.6 17.5 12.8 16.8 1988 11.2 ***** ***** 14.6 18.9 18.8 16.9 17.7 19.0 18.1 15.3 12.3 ****** 1989 ***** 11.9 12.8 15.7 ***** ***** ***** 17.4 17.3 18.1 11.1 10.0 ****** 1990 8.9 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 14.4 ****** 1991 9.1 11.4 10.8 16.0 16.9 19.0 18.8 18.7 18.2 15.2 15.0 9.0 14.9 1992 9.1 10.2 11.7 14.7 15.9 17.6 18.4 18.5 19.3 19.8 ***** ***** ****** 1993 ***** ***** ***** ***** 15.4 18.7 17.3 16.8 17.4 15.2 13.0 15.4 ****** 1994 13.1 13.4 12.6 15.0 15.8 17.7 15.5 16.6 15.4 14.1 10.1 10.5 14.2 1995 11.1 10.3 12.4 14.9 17.4 18.5 16.4 18.1 17.7 17.5 16.7 10.1 15.1 1996 9.6 10.4 10.6 14.8 16.1 19.0 16.4 16.6 18.1 16.5 14.4 13.7 14.7 1997 11.7 13.8 11.1 12.7 16.3 17.0 16.5 16.7 18.4 14.0 10.2 9.4 14.0 1998 9.2 10.5 10.6 15.4 16.2 17.7 15.7 16.3 16.8 17.6 17.8 17.7 15.2 1999 9.6 10.0 11.8 14.4 17.1 18.0 15.6 15.7 17.5 17.0 14.1 15.0 14.6 2000 10.6 12.6 14.1 16.3 16.9 17.1 16.2 15.6 16.9 15.6 11.0 10.4 14.5 2001 12.6 14.2 16.0 17.2 16.2 17.7 16.1 15.9 16.4 16.4 14.8 8.8 15.2 2002 9.8 12.1 13.8 12.8 16.2 17.4 16.4 17.2 17.4 17.3 13.3 9.9 14.5 2003 11.1 11.2 13.7 14.8 15.6 17.8 16.3 16.7 18.1 17.2 15.0 10.2 14.8 MEAN 11.0 12.1 12.9 15.2 17.0 18.6 17.1 17.2 17.9 16.8 13.9 11.8 15.2 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1985 12.5 10.5 14.9 21.2 26.2 31.3 33.2 32.9 29.6 22.6 18.0 11.6 22.0 1986 10.5 11.3 14.0 19.6 27.1 30.1 34.6 33.6 29.7 25.4 15.7 10.9 21.9 1987 11.6 13.2 14.3 20.4 28.9 31.6 33.6 32.9 29.9 24.0 18.5 12.4 22.6 1988 9.7 ***** ***** 22.1 28.2 31.2 33.9 32.9 30.3 25.2 18.0 13.0 ****** 1989 ***** 10.4 15.3 20.6 ***** ***** ***** 33.5 29.0 24.7 17.3 11.8 ****** 1990 9.3 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 13.7 ****** 1991 11.4 11.4 15.3 21.3 25.4 31.0 33.0 32.3 29.0 23.9 17.9 12.6 22.0 1992 7.2 9.6 11.9 18.5 25.9 30.8 33.4 32.4 29.3 22.8 ***** ***** ****** 1993 ***** ***** ***** ***** 26.5 30.7 33.9 33.6 30.1 24.3 17.9 14.1 ****** 1994 11.9 11.5 16.0 22.6 26.6 31.5 33.2 32.9 29.3 24.0 17.2 9.6 22.2 1995 11.4 11.3 13.9 18.7 26.5 30.4 33.0 34.1 29.0 23.4 17.4 11.1 21.7 1996 10.4 13.3 14.3 20.0 28.0 31.2 34.7 34.0 30.0 23.5 17.4 13.9 22.6 1997 11.0 11.2 13.1 18.6 25.8 31.5 33.5 33.0 29.3 24.7 16.1 11.9 21.6 1998 9.1 11.7 14.1 20.5 27.8 33.1 34.8 34.5 30.6 24.6 19.3 16.9 23.1 1999 11.7 13.5 14.4 22.2 28.7 32.5 33.7 34.9 29.9 25.5 17.6 13.8 23.2 2000 10.7 11.5 15.3 24.7 28.8 31.6 34.9 34.6 29.1 24.4 16.0 12.7 22.9 2001 10.4 11.8 16.8 23.2 28.8 32.0 33.6 34.2 30.0 25.7 17.0 14.3 23.2 2002 10.6 12.0 16.7 20.2 28.3 31.4 33.8 33.4 30.3 25.6 17.4 12.2 22.7 2003 10.5 12.9 15.1 22.3 27.3 32.3 33.7 34.1 30.1 25.3 16.8 13.1 22.8 MEAN 10.6 11.7 14.7 21.0 27.3 31.4 33.8 33.5 29.7 24.4 17.4 12.8 22.4 SD 1.26 1.10 1.26 1.71 1.19 0.76 0.62 0.77 0.51 0.94 0.91 1.62 1.05 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1985 1.5 -3.0 -1.0 7.0 7.5 17.0 18.5 20.5 16.0 7.5 6.0 0.5 -3.0 DAY 9 7 1 9 7 10 29 1 20 24 30 6 1986 -3.0 0.0 3.5 8.0 9.0 18.0 22.0 21.0 17.0 10.0 4.0 1.0 -3.0 DAY 22 3 14 6 6 1 3 11 12 25 15 4 1987 1.0 2.0 2.0 4.0 15.0 17.0 20.0 18.8 17.0 11.0 4.0 1.0 1.0 DAY 1 1 15 8 7 14 23 30 15 28 29 31 1988 -2.0 ***** ***** 5.0 15.0 18.0 21.0 22.0 17.0 13.0 3.0 -2.0 ****** DAY 20 ** ** 7 8 4 2 28 30 28 22 29 1989 ***** -2.0 1.0 3.0 ***** ***** ***** 21.0 15.0 10.0 6.0 2.0 ****** DAY ** 16 31 1 ** ** ** 13 30 24 25 26 1990 0.0 ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** 1.0 ****** DAY 11 ** ** ** ** ** ** ** ** ** ** 28 1991 1.0 -1.0 4.0 8.0 11.0 17.0 21.0 16.0 16.0 12.0 7.0 2.0 -1.0 DAY 29 11 8 14 4 1 3 21 26 26 8 30 1992 -2.0 -2.0 -1.0 5.0 12.0 16.0 21.0 21.0 17.0 8.0 ***** ***** ****** DAY 6 12 12 8 5 26 14 23 13 29 ** ** 1993 ***** ***** ***** ***** 11.5 16.5 21.4 21.2 15.4 13.6 3.2 3.4 ****** DAY ** ** ** ** 8 5 9 21 30 31 30 1 1994 1.4 0.8 5.0 8.6 12.0 19.4 19.2 22.0 18.0 14.2 7.6 -1.6 -1.6 DAY 28 7 17 3 2 30 1 25 23 24 27 8 1995 0.6 2.0 2.4 6.4 11.0 19.0 20.0 22.2 16.0 10.0 0.0 1.0 0.0 DAY 23 11 28 7 11 1 1 24 22 15 27 16 1996 1.0 2.2 5.0 7.6 13.6 17.6 22.0 21.8 16.2 11.4 6.6 4.0 1.0 DAY 15 6 5 4 1 7 2 28 21 25 11 17 1997 1.4 -1.8 0.8 4.2 10.6 17.8 22.4 21.0 16.2 11.0 7.4 2.6 -1.8 DAY 5 7 1 13 6 3 3 31 11 26 29 28 1998 -4.0 0.4 2.8 8.2 13.0 20.0 22.6 22.6 18.8 11.8 7.4 4.4 -4.0 DAY 14 14 3 7 4 1 9 23 8 30 26 13 1999 1.8 3.6 4.6 9.4 15.8 19.6 23.4 24.0 15.2 11.4 1.0 2.6 1.0 DAY 23 2 18 11 22 8 1 28 25 24 30 31 2000 0.8 1.0 1.0 9.6 14.4 21.0 24.2 18.6 17.8 13.4 5.2 1.6 0.8 DAY 15 9 11 1 13 15 6 31 1 30 27 17 2001 -1.2 0.8 5.6 9.2 16.4 19.2 23.4 24.0 19.8 15.6 2.8 4.0 -1.2 DAY 28 23 27 14 7 10 2 20 27 3 20 3 2002 1.4 1.4 6.0 8.2 14.4 18.6 23.2 21.6 18.6 11.0 6.0 1.2 1.2 DAY 27 2 1 14 5 8 9 31 18 26 27 26 2003 0.6 1.0 1.0 9.0 11.0 20.0 22.2 22.0 19.2 13.2 2.6 4.0 0.6 DAY 20 18 1 2 1 7 1 31 11 24 19 10 1985-2003 -4.0 -3.0 -1.0 3.0 7.5 16.0 18.5 16.0 15.0 7.5 0.0 -2.0 -4.0 YEAR-DAY 98-14 85- 7 85- 1 89- 1 85- 7 92-26 85-29 91-21 89-30 85-24 95-27 88-29 98 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION DOGONBADAN (40835) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 30 26 N LONGITUDE 50 46 E DATA PROCESSING CENTER ELEVATION 699.5 M