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 **