STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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OF WIND OBSERVATION **** **** **** 150 155 150 155 155 143 155 150 155 1368 VECTOR WIND DIRECTION (MEAN) *** *** *** 224 259 228 222 224 223 237 346 231 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** 2.6 1.4 4.3 3.1 1.6 2.6 2.4 0.4 0.7 **** WIND STEADINESES (MEAN %) ***** ***** ***** 51.0 22.2 71.7 70.5 47.1 55.3 66.7 12.1 46.7 ***** WIND SPEED (MEAN KNOTS) **** **** **** 5.1 6.3 6.0 4.4 3.4 4.7 3.6 3.3 1.5 **** FASTEST WIND DIRECTION *** *** *** 240 60 220 260 240 250 250 10 250 *** FASTEST WIND SPEED (KNOTS) *** *** *** 18 20 17 15 20 18 25 20 18 *** DAY ** ** ** 5 3 17 1 1 10 23 16 17 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** 9 8 23 29 24 29 20 17 11 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** 13 15 6 2 6 1 10 8 8 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** 8 8 1 0 1 0 1 5 12 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** 0 0 0 0 1 0 2 0 10 **** DURATION OF SUNSHINE HOURS ****** ****** ****** 254.7 259.1 331.2 365.5 315.0 309.2 269.2 197.0 139.5 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. 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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 ****** ****** ****** 879.0 878.1 876.8 875.4 878.9 880.6 884.9 884.2 884.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 884.9 886.3 883.7 879.4 884.1 886.2 891.2 888.4 890.8 ****** DAY ** ** ** 16 23 1 25 8 18 26 24 28 MIN. QFE PRESSURE IN HPA ****** ****** ****** 872.4 869.5 870.4 869.8 867.5 875.8 880.7 879.1 877.6 ****** DAY ** ** ** 25 6 11 5 1 10 30 4 17 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1016.1 1015.1 1013.7 1012.1 1016.1 1018.0 1022.8 1021.9 1022.4 ****** MAX. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 879.4 878.0 876.9 875.3 879.2 881.2 884.6 883.8 884.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 885.0 886.5 883.4 879.6 884.5 887.0 890.9 888.4 890.7 ****** DAY ** ** ** 16 24 1 24 8 17 26 9 28 MIN. QFE PRESSURE IN HPA ****** ****** ****** 872.9 869.1 870.4 869.5 867.9 876.2 878.7 879.0 876.7 ****** DAY ** ** ** 25 6 24 31 1 10 30 28 16 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1016.6 1015.1 1013.8 1012.0 1016.3 1018.6 1022.5 1021.5 1022.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1022.9 1024.6 1021.1 1016.8 1022.3 1025.1 1029.5 1026.7 1029.3 ****** DAY ** ** ** 16 24 1 24 8 17 26 9 28 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 877.9 877.0 874.9 873.0 876.7 879.3 883.1 882.8 884.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 882.7 885.2 880.9 876.8 882.4 885.3 888.8 887.7 889.7 ****** DAY ** ** ** 16 23 1 10 24 17 26 9 10 MIN. 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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 DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.6 8.6 11.7 17.2 23.8 30.7 32.0 31.6 26.6 22.2 11.8 5.6 18.5 MINIMUN AIR TEMPERATURE (C) -5.2 2.5 5.3 10.2 15.7 22.5 24.9 24.4 19.0 14.4 4.2 -0.2 11.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 22 29 31 10 0 0 0 96 DAYS WITH MINIMUM TEMP. <=-4 18 1 0 0 0 0 0 0 0 0 1 1 21 DAYS WITH FREEZING MIN.<= 0 31 9 3 0 0 0 0 0 0 0 7 20 70 TEMPERATURE RECORDS LOWEST(C) -12.0 -5.0 -2.0 5.0 9.0 15.0 19.0 22.0 13.0 8.0 -4.0 -4.0 -12.0 DAY 3 7 9 20 1 6 18 15 27 31 7 15 MAXIMUM AIR TEMPERATURE (C) 4.1 12.3 15.8 21.4 27.8 34.9 36.8 35.7 30.7 26.3 16.2 9.7 22.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 29 31 31 21 4 0 0 125 DAYS WITH MAXIMUM TEMP. <= 0 4 0 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS HIGHEST(C) 9.0 22.0 22.0 29.0 34.0 39.0 42.0 40.0 36.0 31.0 24.0 16.0 42.0 DAY 14 19 2 27 29 22 14 4 1 11 2 4 DIF. BETWEEN (MAX.-MIN.) (C) 9.3 9.8 10.5 11.2 12.1 12.4 11.9 11.3 11.7 11.9 12.0 9.9 11.1 MEAN DAILY TEMP. (MDT) (C) -0.5 7.4 10.5 15.8 21.8 28.7 30.9 30.0 24.8 20.3 10.2 4.7 17.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 5.0 51.0 232.0 306.0 280.5 125.0 22.0 0.0 0.0 1021.5 HEATING DEG. DAYS(BASE 18 0C) 575.0 297.5 231.0 84.0 6.0 0.0 0.0 0.0 0.5 7.0 235.5 411.5 1848.0 DEWPOINT (MEAN C) -8.0 -1.3 -3.0 -0.1 1.8 3.8 6.7 6.0 3.5 -0.4 -6.3 -5.2 -0.2 MIXING RATIO (G/KG) 2.60 4.10 3.66 4.53 5.22 5.94 7.23 6.85 5.71 4.32 2.91 3.05 4.68 VAPOUR PRESSURE (HPA) 3.67 5.76 5.14 6.34 7.30 8.27 10.02 9.55 8.00 6.09 4.11 4.31 6.55 SATURATION DEF. (HPA) 2.91 6.01 9.15 14.13 23.15 37.39 39.46 38.00 28.17 21.49 10.61 5.17 19.64 RELATIVE HUMIDITY (MEAN %) 56 53 39 35 27 20 23 22 24 23 32 50 34 RELATIVE HUMIDITY (MAX. %) 72 69 55 53 42 32 34 31 34 34 53 68 48 RELATIVE HUMIDITY (MIN. %) 39 43 26 25 17 14 16 16 18 17 19 35 24 RELATIVE HUMIDITY (MEAN% 03UTC) 63 65 51 51 42 32 32 32 33 34 51 61 46 RELATIVE HUMIDITY (MEAN% 09UTC) 51 48 34 30 22 17 21 19 22 20 23 42 29 RELATIVE HUMIDITY (MEAN% 15UTC) 61 52 37 29 20 15 17 18 20 22 29 50 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 27.0 56.2 11.2 28.8 0.1 0.0 0.0 0.0 0.0 0.0 11.2 18.0 152.5 DAYS WITH PRECIPITATION >=10 0 3 0 2 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 1 5 1 2 0 0 0 0 0 0 1 2 12 DAYS WITH PRECIPITATION >= 1 8 7 3 6 0 0 0 0 0 0 2 4 30 DAYS WITH PRECIPITATION 10 9 5 8 1 0 0 0 0 0 3 5 41 GREATEST DAILY PRECIPITATION 7.0 15.0 6.0 10.0 0.1 0.0 0.0 0.0 0.0 0.0 8.0 7.0 15.0 DAY 16 23 29 1 10 ** ** ** ** ** 23 29 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 4 0 0 0 0 0 0 0 0 0 0 2 6 DAYS WITH DUST 17 11 7 8 7 15 9 11 16 15 5 12 133 WIND DIRECTION (PREVAILING) 225 270 270 270 270 225 225 225 225 225 225 45 225 PREVAILING WIND SPEED(KNOTS) 7.1 12.8 13.3 12.6 13.1 7.8 5.9 6.2 6.0 6.8 8.2 5.4 7.8 PREVAILING WIND PERCENT 9.7 17.1 16.8 23.3 27.7 28.7 25.2 15.5 13.3 11.0 11.3 6.5 14.4 CALMS PERCENT OF WIND 70.3 52.1 52.3 46.0 38.7 52.0 49.0 74.8 66.7 74.8 66.7 80.0 60.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 241 275 260 260 248 224 214 209 218 238 244 261 244 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.8 2.8 3.5 5.2 2.7 2.2 1.1 1.3 1.1 1.6 0.7 1.9 WIND STEADINESES (MEAN %) 22.7 40.0 58.3 61.4 78.8 75.0 68.7 68.7 65.0 57.9 55.2 43.8 55.9 WIND SPEED (MEAN KNOTS) 2.2 4.5 4.8 5.7 6.6 3.6 3.2 1.6 2.0 1.9 2.9 1.6 3.4 FASTEST WIND DIRECTION 250 270 270 270 250 240 230 150 280 270 270 270 270 FASTEST WIND SPEED (KNOTS) 22 27 25 30 30 20 12 10 12 20 25 20 30 DAY 17 1 7 6 23 4 22 13 6 5 6 6 DAYS WITH SKY CLEAR (0-2)/8 14 13 13 12 26 28 27 28 29 19 21 19 249 DAYS WITH P.CLOUDY (3-6)/8 11 10 9 10 4 2 4 3 1 11 7 7 79 DAYS WITH CLOUDY (7-8)/8 6 5 9 8 1 0 0 0 0 1 2 5 37 DAYS WITH VISIBILITY =< 2 KM 4 1 0 2 1 0 0 0 2 1 1 5 17 DURATION OF SUNSHINE HOURS 170.2 179.8 216.3 241.8 344.3 354.2 337.5 330.7 303.2 255.4 190.9 222.7 3147.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 884.2 880.4 879.6 877.4 877.3 874.5 872.6 877.2 879.7 883.1 883.3 884.2 879.5 MAX. QFE PRESSURE IN HPA 896.3 889.1 890.7 885.4 886.1 881.1 878.8 881.7 887.8 889.0 891.1 894.3 896.3 DAY-HOUR 26- 6 7- 6 10- 6 11- 6 8- 6 3- 6 23- 6 7- 6 29- 3 23- 6 12- 6 27- 6 MIN. QFE PRESSURE IN HPA 871.0 862.0 871.6 870.4 870.2 866.7 866.2 872.3 868.6 876.7 875.3 874.8 862.0 DAY-HOUR 31-15 22-12 22-15 8-15 29-15 15-15 9-15 28-15 29- 6 29-15 4-15 7-12 MEAN QNH PRESSURE IN HPA 1022.0 1017.7 1016.9 1014.4 1014.3 1011.0 1008.9 1014.1 1017.0 1020.8 1020.9 1022.0 1016.7 MAX. QNH PRESSURE IN HPA 1035.6 1027.5 1029.3 1023.3 1024.1 1018.5 1015.9 1019.2 1026.0 1027.4 1029.8 1033.4 1035.6 DAY-HOUR 26- 6 7- 6 10- 6 11- 6 8- 6 3- 6 23- 6 7- 6 29- 3 23- 6 12- 6 27- 6 MIN. QNH PRESSURE IN HPA 1007.2 997.0 1007.8 1006.5 1006.3 1002.3 1001.7 1008.6 1004.4 1013.6 1012.0 1011.4 997.0 DAY-HOUR 31-15 22-12 22-15 8-15 29-15 15-15 9-15 28-15 29- 6 29-15 4-15 7-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 884.3 880.6 880.0 877.9 878.0 875.0 873.3 878.0 880.5 883.7 883.8 884.4 880.0 MAX. QFE PRESSURE IN HPA 894.7 888.3 889.2 884.7 885.5 880.5 878.0 881.5 887.8 888.5 890.2 893.3 894.7 DAY 26 7 10 11 8 3 23 7 29 23 12 27 MIN. QFE PRESSURE IN HPA 871.9 867.8 872.3 874.4 872.1 868.5 868.4 875.0 875.3 878.6 876.9 875.8 867.8 DAY 16 22 7 28 30 16 11 4 2 30 5 7 MEAN QNH PRESSURE IN HPA 1022.1 1017.9 1017.3 1015.0 1015.0 1011.6 1009.8 1015.0 1017.8 1021.4 1021.5 1022.2 1017.2 MAX. QNH PRESSURE IN HPA 1033.8 1026.6 1027.6 1022.6 1023.5 1017.8 1015.0 1019.0 1026.0 1026.8 1028.7 1032.2 1033.8 DAY 26 7 10 11 8 3 23 7 29 23 12 27 MIN. QNH PRESSURE IN HPA 1008.2 1003.5 1008.6 1011.0 1008.4 1004.3 1004.2 1011.6 1012.0 1015.7 1013.8 1012.6 1003.5 DAY 16 22 7 28 30 16 11 4 2 30 5 7 MEAN QFF PRESSURE IN HPA 1027.0 1018.6 1015.9 1010.9 1007.7 1000.9 998.0 1003.9 1009.3 1015.3 1020.7 1024.2 1012.7 MAX. QFF PRESSURE IN HPA 1040.4 1031.9 1030.2 1020.0 1017.0 1007.9 1003.0 1008.3 1020.7 1021.4 1028.6 1034.6 1040.4 DAY 3 7 10 11 8 3 23 23 29 23 10 27 MIN. QFF PRESSURE IN HPA 1011.1 1002.9 1005.6 1003.0 998.2 994.2 992.6 999.6 1001.4 1010.0 1009.0 1012.8 992.6 DAY 16 22 22 28 30 15 15 4 2 30 5 7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.4 881.2 881.0 878.7 878.6 875.7 874.0 878.8 880.8 884.4 884.6 885.5 880.7 MAX. QFE PRESSURE IN HPA 896.3 889.1 890.7 885.4 886.1 881.1 878.8 881.7 887.4 889.0 891.1 894.3 896.3 DAY 26 7 10 11 8 3 23 7 27 23 12 27 MIN. QFE PRESSURE IN HPA 873.0 866.7 873.5 874.5 872.6 869.4 869.3 875.4 868.6 879.2 878.6 877.5 866.7 DAY 16 22 7 8 30 15 10 4 29 30 5 7 MEAN QNH PRESSURE IN HPA 1023.4 1018.6 1018.5 1015.8 1015.7 1012.4 1010.5 1015.9 1018.2 1022.3 1022.4 1023.5 1018.1 MAX. QNH PRESSURE IN HPA 1035.6 1027.5 1029.3 1023.3 1024.1 1018.5 1015.9 1019.2 1025.6 1027.4 1029.8 1033.4 1035.6 DAY 26 7 10 11 8 3 23 7 27 23 12 27 MIN. QNH PRESSURE IN HPA 1009.4 1002.3 1010.0 1011.1 1008.9 1005.3 1005.2 1012.1 1004.4 1016.4 1015.7 1014.5 1002.3 DAY 16 22 7 8 30 15 10 4 29 30 5 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 884.5 880.6 880.2 878.0 877.8 875.0 873.2 877.7 880.6 883.5 883.4 884.7 879.9 MAX. QFE PRESSURE IN HPA 896.0 887.5 890.2 884.5 885.1 880.6 877.8 880.9 887.6 888.7 889.9 893.7 896.0 DAY 26 7 10 11 7 3 23 7 29 22 12 26 MIN. QFE PRESSURE IN HPA 873.3 865.0 873.5 873.4 872.4 868.4 868.8 874.9 875.3 878.3 877.5 875.3 865.0 DAY 16 22 22 28 30 15 10 4 1 30 4 7 MEAN QNH PRESSURE IN HPA 1022.3 1018.0 1017.5 1015.0 1014.8 1011.7 1009.6 1014.7 1017.9 1021.2 1021.1 1022.5 1017.2 MAX. QNH PRESSURE IN HPA 1035.3 1025.7 1028.7 1022.3 1023.0 1017.9 1014.8 1018.3 1025.8 1027.1 1028.4 1032.7 1035.3 DAY 26 7 10 11 7 3 23 7 29 22 12 26 MIN. QNH PRESSURE IN HPA 1009.7 1000.4 1010.0 1009.8 1008.7 1004.2 1004.7 1011.5 1012.0 1015.4 1014.5 1012.0 1000.4 DAY 16 22 22 28 30 15 10 4 1 30 4 7 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 883.4 879.7 878.6 876.5 876.4 873.7 871.6 876.0 878.7 882.1 882.1 883.4 878.5 MAX. QFE PRESSURE IN HPA 893.7 886.6 888.0 882.2 883.9 879.0 876.1 879.0 885.4 887.7 888.6 892.6 893.7 DAY 25 7 10 11 7 2 27 22 29 22 11 26 MIN. QFE PRESSURE IN HPA 873.6 862.0 872.2 871.0 871.0 867.3 866.9 873.1 873.1 877.2 875.7 874.8 862.0 DAY 13 22 22 8 29 15 9 28 1 29 4 7 MEAN QNH PRESSURE IN HPA 1021.1 1017.0 1015.7 1013.3 1013.3 1010.1 1007.8 1012.7 1015.8 1019.6 1019.6 1021.1 1015.6 MAX. QNH PRESSURE IN HPA 1032.7 1024.7 1026.3 1019.7 1021.7 1016.2 1012.9 1016.2 1023.3 1025.9 1026.9 1031.4 1032.7 DAY 25 7 10 11 7 2 27 22 29 22 11 26 MIN. QNH PRESSURE IN HPA 1010.1 997.0 1008.5 1007.2 1007.2 1003.0 1002.5 1009.5 1009.5 1014.1 1012.4 1011.4 997.0 DAY 13 22 22 8 29 15 9 28 1 29 4 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 883.5 879.8 878.3 876.0 876.0 873.0 870.9 875.4 878.3 881.8 882.4 883.3 878.2 MAX. QFE PRESSURE IN HPA 893.3 886.8 888.0 882.0 883.7 878.4 875.6 878.2 885.0 887.6 889.3 892.2 893.3 DAY 3 7 10 10 8 2 22 6 29 22 12 26 MIN. QFE PRESSURE IN HPA 871.0 862.0 871.6 870.4 870.2 866.7 866.2 872.3 872.0 876.7 875.3 875.6 862.0 DAY 31 22 22 8 29 15 9 28 1 29 4 7 MEAN QNH PRESSURE IN HPA 1021.2 1017.1 1015.4 1012.8 1012.7 1009.4 1007.1 1012.1 1015.4 1019.3 1020.0 1021.0 1015.3 MAX. QNH PRESSURE IN HPA 1032.2 1024.9 1026.3 1019.5 1021.4 1015.5 1012.3 1015.3 1022.9 1025.8 1027.7 1031.0 1032.2 DAY 3 7 10 10 8 2 22 6 29 22 12 26 MIN. QNH PRESSURE IN HPA 1007.2 997.0 1007.8 1006.5 1006.3 1002.3 1001.7 1008.6 1008.3 1013.6 1012.0 1012.3 997.0 DAY 31 22 22 8 29 15 9 28 1 29 4 7 MEAN QFF PRESSURE IN HPA 1026.0 1017.6 1014.0 1008.6 1005.4 998.6 995.3 1000.9 1006.9 1013.1 1019.2 1022.9 1010.7 MAX. QFF PRESSURE IN HPA 1040.3 1029.8 1028.3 1017.0 1015.0 1005.9 1000.0 1004.1 1017.4 1020.2 1027.5 1034.2 1040.3 DAY 3 7 10 10 8 2 22 23 29 22 12 26 MIN. QFF PRESSURE IN HPA 1008.3 997.1 1003.4 1000.9 995.5 992.0 989.4 996.1 997.5 1008.7 1006.3 1012.4 989.4 DAY 31 22 22 28 29 15 15 4 1 29 4 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 DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.8 2.4 11.6 15.6 25.5 30.4 30.4 29.7 25.7 18.9 14.1 4.0 17.4 MINIMUN AIR TEMPERATURE (C) -3.6 -2.6 5.8 7.0 17.4 22.1 22.9 22.3 18.2 10.5 7.0 -1.2 10.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 6 21 24 25 5 0 0 0 81 DAYS WITH MINIMUM TEMP. <=-4 17 9 0 0 0 0 0 0 0 0 0 7 33 DAYS WITH FREEZING MIN.<= 0 31 24 5 2 0 0 0 0 0 0 0 22 84 TEMPERATURE RECORDS LOWEST(C) -10.0 -8.0 -2.0 -2.0 7.0 12.0 17.0 19.0 11.0 5.0 3.0 -6.0 -10.0 DAY 19 3 5 1 1 8 7 25 26 27 27 27 MAXIMUM AIR TEMPERATURE (C) 3.6 5.7 15.4 20.1 29.6 34.8 35.1 34.2 30.2 23.2 18.0 7.7 21.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 18 28 31 30 17 0 0 0 124 DAYS WITH MAXIMUM TEMP. <= 0 3 1 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS HIGHEST(C) 6.0 12.0 26.0 27.0 35.0 39.0 40.0 37.0 34.0 27.0 25.0 15.0 40.0 DAY 20 14 20 18 23 18 1 13 9 23 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 7.2 8.3 9.6 13.1 12.2 12.7 12.2 11.9 12.0 12.7 11.0 8.9 11.0 MEAN DAILY TEMP. (MDT) (C) 0.0 1.5 10.6 13.5 23.5 28.4 29.0 28.3 24.2 16.8 12.5 3.3 16.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 98.5 224.0 248.5 225.5 101.0 0.0 0.0 0.0 897.5 HEATING DEG. DAYS(BASE 18 0C) 558.0 461.0 231.0 139.0 7.0 0.0 0.0 0.0 0.0 45.0 162.5 456.5 2060.0 DEWPOINT (MEAN C) -5.0 -4.3 1.9 -1.6 0.4 2.8 8.1 8.1 4.2 -1.5 -1.1 -4.0 0.7 MIXING RATIO (G/KG) 3.10 3.31 5.15 4.15 4.68 5.60 8.00 8.23 6.01 3.99 4.09 3.36 4.97 VAPOUR PRESSURE (HPA) 4.37 4.66 7.23 5.81 6.55 7.79 11.10 11.41 8.41 5.64 5.78 4.74 6.96 SATURATION DEF. (HPA) 2.20 2.81 7.66 13.01 27.37 37.12 33.44 31.31 25.51 16.90 10.90 3.66 17.66 RELATIVE HUMIDITY (MEAN %) 68 63 57 38 22 20 27 28 27 27 38 59 40 RELATIVE HUMIDITY (MAX. %) 79 76 70 57 32 30 41 39 39 37 54 73 52 RELATIVE HUMIDITY (MIN. %) 55 51 45 25 14 13 19 22 20 20 27 47 30 RELATIVE HUMIDITY (MEAN% 03UTC) 71 70 69 53 31 30 41 38 38 36 53 65 50 RELATIVE HUMIDITY (MEAN% 09UTC) 64 60 54 34 19 17 23 26 24 22 32 52 36 RELATIVE HUMIDITY (MEAN% 15UTC) 70 64 52 32 19 14 22 24 24 25 35 65 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 64.6 60.0 32.6 35.0 0.0 10.5 40.0 0.0 3.0 0.0 5.0 61.0 311.7 DAYS WITH PRECIPITATION >=10 2 2 0 1 0 0 1 0 0 0 0 3 9 DAYS WITH PRECIPITATION >= 5 6 5 2 4 0 1 4 0 0 0 0 3 25 DAYS WITH PRECIPITATION >= 1 14 11 9 8 0 2 8 0 2 0 2 7 63 DAYS WITH PRECIPITATION 18 12 12 9 0 4 8 0 3 0 2 8 76 GREATEST DAILY PRECIPITATION 12.0 16.0 8.1 10.0 0.0 9.0 10.0 0.0 2.0 0.0 3.0 21.0 21.0 DAY 14 26 1 5 ** 12 18 ** 25 ** 8 6 DAY WITH THUNDER STORM 0 0 1 2 0 0 1 0 1 0 0 0 5 DAYS WITH SNOW OR SLEET 11 5 1 0 0 0 0 0 0 0 0 4 21 DAYS WITH DUST 10 16 12 14 10 10 15 14 20 14 15 17 167 WIND DIRECTION (PREVAILING) 45 225 225 270 225 225 225 225 225 45 225 45 225 PREVAILING WIND SPEED(KNOTS) 5.9 6.2 8.3 16.7 8.9 8.1 8.1 6.4 7.9 5.9 6.9 5.4 7.8 PREVAILING WIND PERCENT 7.1 7.1 13.6 17.3 16.1 10.7 22.6 24.2 14.7 8.4 8.3 9.7 12.0 CALMS PERCENT OF WIND 84.5 82.9 69.5 57.3 55.5 69.3 41.9 54.1 59.3 71.0 72.4 81.3 66.4 NO. OF WIND OBSERVATION 155 140 154 150 155 150 155 157 150 155 145 155 1821 VECTOR WIND DIRECTION (MEAN) 66 235 236 258 254 237 215 231 247 278 262 338 246 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.3 1.2 3.7 1.8 1.7 1.9 1.9 1.3 0.9 1.3 0.2 1.2 WIND STEADINESES (MEAN %) 37.5 30.0 50.0 71.2 42.9 65.4 41.3 61.3 40.6 42.9 61.9 18.2 44.4 WIND SPEED (MEAN KNOTS) 0.8 1.0 2.4 5.2 4.2 2.6 4.6 3.1 3.2 2.1 2.1 1.1 2.7 FASTEST WIND DIRECTION 60 210 240 270 280 250 80 250 270 260 270 280 280 FASTEST WIND SPEED (KNOTS) 12 12 18 28 30 20 18 20 25 25 16 15 30 DAY 24 5 28 7 5 3 3 22 3 29 11 23 DAYS WITH SKY CLEAR (0-2)/8 10 7 4 10 14 27 16 24 24 28 15 18 197 DAYS WITH P.CLOUDY (3-6)/8 7 11 14 10 15 3 15 7 5 3 13 8 111 DAYS WITH CLOUDY (7-8)/8 14 10 13 10 2 0 0 0 1 0 1 5 56 DAYS WITH VISIBILITY =< 2 KM 17 12 14 4 0 0 0 0 0 0 1 9 57 DURATION OF SUNSHINE HOURS 78.3 112.4 90.5 196.8 268.9 336.2 329.4 345.2 281.5 248.1 184.2 168.9 2640.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 881.3 882.4 881.7 876.1 877.6 874.6 874.0 875.2 878.8 884.5 884.7 882.6 879.5 MAX. QFE PRESSURE IN HPA 893.2 889.4 889.8 884.1 883.5 879.2 879.6 880.6 883.5 891.8 893.6 888.8 893.6 DAY-HOUR 5- 6 4- 6 10- 6 26- 6 9- 6 14- 6 29- 6 26- 6 9- 6 15- 6 18- 6 31- 9 MIN. QFE PRESSURE IN HPA 868.5 873.7 874.1 869.9 869.9 869.3 865.0 868.8 870.6 878.7 876.2 873.6 865.0 DAY-HOUR 21-15 12-12 24-12 20-15 27-15 25-15 4-15 8-15 2-15 29-15 24-12 5-15 MEAN QNH PRESSURE IN HPA 1018.7 1020.0 1019.2 1012.8 1014.6 1011.2 1010.6 1011.8 1016.0 1022.3 1022.5 1020.2 1016.7 MAX. QNH PRESSURE IN HPA 1032.1 1027.8 1028.3 1021.9 1021.2 1016.4 1016.8 1017.9 1021.2 1030.5 1032.6 1027.2 1032.6 DAY-HOUR 5- 6 4- 6 10- 6 26- 6 9- 6 14- 6 29- 6 26- 6 9- 6 15- 6 18- 6 31- 9 MIN. QNH PRESSURE IN HPA 1004.3 1010.2 1010.6 1005.9 1005.9 1005.2 1000.4 1004.7 1006.7 1015.8 1013.0 1010.1 1000.4 DAY-HOUR 21-15 12-12 24-12 20-15 27-15 25-15 4-15 8-15 2-15 29-15 24-12 5-15 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 881.5 882.6 881.7 876.4 878.2 875.2 874.8 875.9 879.3 884.9 884.9 882.6 879.8 MAX. QFE PRESSURE IN HPA 891.4 888.3 888.7 882.6 882.3 878.7 878.6 879.9 882.1 890.6 892.1 887.3 892.1 DAY 5 4 7 26 9 14 24 26 8 14 18 3 MIN. QFE PRESSURE IN HPA 872.3 875.5 875.6 870.7 872.5 871.6 868.2 871.7 872.0 881.2 879.0 874.5 868.2 DAY 22 12 25 28 28 27 5 17 3 21 26 23 MEAN QNH PRESSURE IN HPA 1019.0 1020.2 1019.2 1013.2 1015.3 1011.9 1011.5 1012.6 1016.5 1022.8 1022.8 1020.2 1017.1 MAX. QNH PRESSURE IN HPA 1030.1 1026.6 1027.1 1020.2 1019.9 1015.8 1015.7 1017.2 1019.6 1029.2 1030.9 1025.5 1030.9 DAY 5 4 7 26 9 14 24 26 8 14 18 3 MIN. QNH PRESSURE IN HPA 1008.6 1012.2 1012.3 1006.8 1008.8 1007.8 1004.0 1007.9 1008.3 1018.6 1016.2 1011.1 1004.0 DAY 22 12 25 28 28 27 5 17 3 21 26 23 MEAN QFF PRESSURE IN HPA 1023.1 1023.7 1017.6 1009.6 1007.3 1001.3 1000.7 1002.2 1008.3 1018.5 1020.7 1022.9 1013.0 MAX. QFF PRESSURE IN HPA 1033.1 1032.5 1030.7 1017.0 1014.4 1006.9 1005.2 1008.2 1013.4 1027.0 1029.5 1029.3 1033.1 DAY 5 4 7 26 2 5 24 26 26 15 18 31 MIN. QFF PRESSURE IN HPA 1010.9 1015.2 1006.7 1000.6 998.6 996.7 992.8 996.6 998.9 1013.6 1013.7 1012.9 992.8 DAY 21 12 24 28 28 27 5 9 3 28 3 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 882.5 883.4 882.7 877.4 878.9 875.9 875.5 876.6 880.2 885.8 886.0 883.6 880.7 MAX. QFE PRESSURE IN HPA 893.2 889.4 889.8 884.1 883.5 879.2 879.6 880.6 883.5 891.8 893.6 888.6 893.6 DAY 5 4 10 26 9 14 29 26 9 15 18 31 MIN. QFE PRESSURE IN HPA 873.3 876.5 876.3 871.4 873.2 872.5 868.3 872.0 872.1 882.2 880.0 876.2 868.3 DAY 22 12 24 28 27 27 5 16 3 29 26 23 MEAN QNH PRESSURE IN HPA 1020.1 1021.1 1020.3 1014.4 1016.0 1012.6 1012.2 1013.5 1017.5 1023.9 1024.0 1021.3 1018.1 MAX. QNH PRESSURE IN HPA 1032.1 1027.8 1028.3 1021.9 1021.2 1016.4 1016.8 1017.9 1021.2 1030.5 1032.6 1026.9 1032.6 DAY 5 4 10 26 9 14 29 26 9 15 18 31 MIN. QNH PRESSURE IN HPA 1009.7 1013.3 1013.1 1007.6 1009.6 1008.8 1004.1 1008.3 1008.4 1019.7 1017.3 1013.0 1004.1 DAY 22 12 24 28 27 27 5 16 3 29 26 23 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 881.5 882.9 882.2 876.6 878.2 875.2 874.7 875.9 879.5 885.0 885.1 882.7 879.9 MAX. QFE PRESSURE IN HPA 892.3 888.9 889.6 882.9 882.3 878.5 878.7 880.0 883.4 891.4 892.0 888.8 892.3 DAY 5 4 10 26 9 14 23 26 9 14 18 31 MIN. QFE PRESSURE IN HPA 871.4 875.2 875.5 871.4 872.1 871.5 869.1 871.4 872.2 880.3 879.0 875.6 869.1 DAY 21 12 24 28 27 25 5 16 3 29 26 23 MEAN QNH PRESSURE IN HPA 1019.0 1020.5 1019.8 1013.5 1015.2 1011.9 1011.3 1012.6 1016.7 1022.8 1023.0 1020.3 1017.2 MAX. QNH PRESSURE IN HPA 1031.1 1027.3 1028.1 1020.5 1019.9 1015.6 1015.8 1017.3 1021.1 1030.1 1030.8 1027.2 1031.1 DAY 5 4 10 26 9 14 23 26 9 14 18 31 MIN. QNH PRESSURE IN HPA 1007.6 1011.9 1012.2 1007.6 1008.4 1007.7 1005.0 1007.6 1008.5 1017.6 1016.2 1012.3 1005.0 DAY 21 12 24 28 27 25 5 16 3 29 26 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.5 881.7 880.9 875.1 876.6 873.7 872.9 874.1 877.8 883.5 883.7 881.9 878.5 MAX. QFE PRESSURE IN HPA 891.3 887.5 888.0 881.2 879.9 877.0 877.0 878.0 880.6 889.6 891.1 887.8 891.3 DAY 5 3 7 26 8 22 23 26 30 14 18 31 MIN. QFE PRESSURE IN HPA 868.8 873.7 874.1 870.4 870.6 870.1 866.0 869.2 871.1 879.2 876.2 874.8 866.0 DAY 21 12 24 20 27 26 4 8 2 29 24 5 MEAN QNH PRESSURE IN HPA 1017.9 1019.2 1018.3 1011.7 1013.4 1010.1 1009.3 1010.7 1014.8 1021.2 1021.4 1019.4 1015.6 MAX. QNH PRESSURE IN HPA 1030.0 1025.7 1026.3 1018.6 1017.2 1013.9 1013.9 1015.0 1017.9 1028.1 1029.8 1026.0 1030.0 DAY 5 3 7 26 8 22 23 26 30 14 18 31 MIN. QNH PRESSURE IN HPA 1004.7 1010.2 1010.6 1006.5 1006.7 1006.1 1001.5 1005.1 1007.3 1016.4 1013.0 1011.4 1001.5 DAY 21 12 24 20 27 26 4 8 2 29 24 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 880.4 881.8 880.9 874.8 876.4 873.0 872.3 873.4 877.5 883.3 883.9 882.2 878.3 MAX. QFE PRESSURE IN HPA 890.8 887.7 888.0 879.2 880.2 875.8 876.4 877.8 880.9 889.4 891.2 888.0 891.2 DAY 5 3 9 3 10 18 23 26 8 14 18 6 MIN. QFE PRESSURE IN HPA 868.5 874.4 874.1 869.9 869.9 869.3 865.0 868.8 870.6 878.7 876.7 873.6 865.0 DAY 21 12 24 20 27 25 4 8 2 29 24 5 MEAN QNH PRESSURE IN HPA 1017.8 1019.3 1018.3 1011.5 1013.2 1009.4 1008.6 1009.8 1014.5 1020.9 1021.6 1019.8 1015.4 MAX. QNH PRESSURE IN HPA 1029.4 1025.9 1026.3 1016.4 1017.5 1012.6 1013.2 1014.8 1018.3 1027.8 1029.9 1026.3 1029.9 DAY 5 3 9 3 10 18 23 26 8 14 18 6 MIN. QNH PRESSURE IN HPA 1004.3 1011.0 1010.6 1005.9 1005.9 1005.2 1000.4 1004.7 1006.7 1015.8 1013.6 1010.1 1000.4 DAY 21 12 24 20 27 25 4 8 2 29 24 5 MEAN QFF PRESSURE IN HPA 1021.8 1022.6 1016.7 1007.8 1005.2 998.8 998.0 999.4 1006.3 1016.5 1019.5 1022.6 1011.3 MAX. QFF PRESSURE IN HPA 1032.4 1032.2 1029.3 1016.2 1012.3 1003.2 1002.7 1006.3 1011.5 1025.7 1028.2 1030.3 1032.4 DAY 5 4 7 2 2 10 23 26 30 14 18 6 MIN. QFF PRESSURE IN HPA 1007.5 1012.6 1004.6 1000.0 995.8 993.9 988.6 993.6 997.4 1010.8 1010.0 1013.9 988.6 DAY 21 12 24 20 27 25 4 8 2 29 24 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.7 5.8 11.5 19.3 24.1 30.6 33.3 29.8 25.6 17.6 8.8 2.6 17.7 MINIMUN AIR TEMPERATURE (C) -1.3 -0.7 4.3 10.9 15.5 22.3 26.9 23.8 19.9 12.1 5.0 -0.0 11.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 25 31 26 11 0 0 0 97 DAYS WITH MINIMUM TEMP. <=-4 6 6 0 0 0 0 0 0 0 0 0 0 12 DAYS WITH FREEZING MIN.<= 0 25 17 7 0 0 0 0 0 0 0 1 23 73 TEMPERATURE RECORDS LOWEST(C) -5.0 -7.0 -3.0 6.0 10.0 15.0 22.0 18.0 17.0 8.0 -1.0 -3.0 -7.0 DAY 15 13 4 3 7 4 19 28 24 16 30 7 MAXIMUM AIR TEMPERATURE (C) 7.2 9.3 15.9 23.5 28.3 34.6 38.8 35.5 31.3 23.5 13.8 6.5 22.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 12 29 31 30 23 1 0 0 127 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 12.0 17.0 23.0 30.0 36.0 41.0 42.0 40.0 36.0 30.0 21.0 12.0 42.0 DAY 2 24 23 14 30 28 25 1 7 1 1 13 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 10.0 11.6 12.6 12.8 12.3 11.9 11.7 11.4 11.4 8.8 6.5 10.9 MEAN DAILY TEMP. (MDT) (C) 3.0 4.3 10.1 17.2 21.9 28.5 32.9 29.6 25.6 17.8 9.4 3.2 17.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.0 58.0 224.0 367.5 268.0 138.0 8.0 0.0 0.0 1064.5 HEATING DEG. DAYS(BASE 18 0C) 466.5 383.5 244.0 45.5 4.5 0.0 0.0 0.0 0.0 48.0 258.5 458.0 1908.5 DEWPOINT (MEAN C) -3.4 -2.9 -2.4 1.4 3.5 2.5 5.7 5.5 5.6 -0.1 -1.3 -2.9 0.9 MIXING RATIO (G/KG) 3.47 3.67 3.78 5.05 5.86 5.43 6.84 6.62 6.64 4.45 4.04 3.62 4.95 VAPOUR PRESSURE (HPA) 4.89 5.15 5.30 7.08 8.18 7.57 9.49 9.21 9.29 6.25 5.71 5.11 6.94 SATURATION DEF. (HPA) 3.35 4.51 9.12 16.15 23.10 37.69 42.87 34.10 24.43 14.76 6.02 2.41 18.21 RELATIVE HUMIDITY (MEAN %) 62 57 41 33 30 19 19 23 29 32 52 69 39 RELATIVE HUMIDITY (MAX. %) 76 76 60 48 47 27 26 32 38 45 66 83 52 RELATIVE HUMIDITY (MIN. %) 48 43 28 23 19 13 13 16 21 21 38 53 28 RELATIVE HUMIDITY (MEAN% 03UTC) 66 73 57 46 45 27 24 29 36 42 62 74 48 RELATIVE HUMIDITY (MEAN% 09UTC) 57 52 34 28 25 16 16 18 25 24 41 61 33 RELATIVE HUMIDITY (MEAN% 15UTC) 66 53 38 30 25 16 15 19 27 30 50 69 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 59.6 68.5 22.0 20.0 30.5 3.0 0.0 0.0 0.0 0.0 32.0 44.0 279.6 DAYS WITH PRECIPITATION >=10 3 3 0 1 1 0 0 0 0 0 2 1 11 DAYS WITH PRECIPITATION >= 5 4 5 2 1 2 0 0 0 0 0 2 5 21 DAYS WITH PRECIPITATION >= 1 10 8 5 4 5 1 0 0 0 0 5 8 46 DAYS WITH PRECIPITATION 10 10 7 5 6 1 0 0 1 0 5 10 55 GREATEST DAILY PRECIPITATION 16.0 23.0 8.0 15.0 18.0 3.0 0.0 0.0 0.0 0.0 13.0 11.0 23.0 DAY 4 21 2 23 13 3 ** ** ** ** 29 23 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 0 0 0 1 1 3 DAYS WITH SNOW OR SLEET 4 2 1 0 0 0 0 0 0 0 0 6 13 DAYS WITH DUST 16 11 14 13 12 8 2 7 5 4 1 12 105 WIND DIRECTION (PREVAILING) 270 270 270 270 225 180 180 180 180 180 225 225 180 PREVAILING WIND SPEED(KNOTS) 11.6 11.5 14.5 11.0 9.0 5.9 7.6 6.8 6.3 6.6 7.1 7.2 6.5 PREVAILING WIND PERCENT 5.2 15.0 16.8 10.7 15.5 16.7 19.0 12.9 13.3 6.5 6.7 7.7 8.4 CALMS PERCENT OF WIND 87.1 67.9 62.6 72.0 51.0 59.3 62.5 69.8 72.1 81.9 80.4 83.9 71.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 232 248 240 248 240 248 2361 VECTOR WIND DIRECTION (MEAN) 263 268 258 251 233 198 172 164 182 202 204 223 225 VECTOR WIND MAGNITUDE(KNOTS) 0.6 1.2 3.0 1.5 2.2 1.8 1.6 0.8 0.6 0.8 0.5 0.6 1.0 WIND STEADINESES (MEAN %) 54.5 41.4 69.8 65.2 55.0 64.3 57.1 38.1 30.0 66.7 35.7 54.5 43.5 WIND SPEED (MEAN KNOTS) 1.1 2.9 4.3 2.3 4.0 2.8 2.8 2.1 2.0 1.2 1.4 1.1 2.3 FASTEST WIND DIRECTION 270 250 260 260 250 250 180 180 270 260 220 240 260 FASTEST WIND SPEED (KNOTS) 20 20 20 35 30 20 15 15 20 15 14 35 35 DAY 6 11 3 23 2 4 17 7 23 29 25 11 DAYS WITH SKY CLEAR (0-2)/8 14 11 14 15 13 27 26 28 26 29 17 11 231 DAYS WITH P.CLOUDY (3-6)/8 10 10 13 10 13 3 5 2 4 2 11 8 91 DAYS WITH CLOUDY (7-8)/8 7 7 4 5 5 0 0 1 0 0 2 12 43 DAYS WITH VISIBILITY =< 2 KM 12 4 1 0 0 1 0 0 0 0 1 12 31 DURATION OF SUNSHINE HOURS 159.8 154.8 227.2 214.3 ****** 323.5 342.0 325.9 294.1 266.9 197.1 104.5 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 883.0 879.7 878.7 880.1 878.1 875.3 873.2 875.2 878.9 881.4 884.4 883.5 879.3 MAX. QFE PRESSURE IN HPA 894.9 889.0 887.0 889.9 884.7 880.0 879.4 895.7 899.7 890.2 891.8 890.3 899.7 DAY-HOUR 15- 6 17- 6 5- 6 3- 6 20- 6 8- 3 28- 6 7-18 5- 0 20- 6 15- 6 25- 6 MIN. QFE PRESSURE IN HPA 876.6 870.6 867.8 873.0 872.8 869.2 867.7 866.7 868.2 873.8 872.4 872.2 866.7 DAY-HOUR 5-12 10-15 18-15 23- 9 17-15 24-15 17-15 15-15 9-15 2-12 28-15 23-12 MEAN QNH PRESSURE IN HPA 1020.6 1016.9 1015.8 1017.3 1015.1 1012.0 1009.6 1011.8 1016.0 1018.9 1022.2 1021.3 1016.5 MAX. QNH PRESSURE IN HPA 1034.0 1027.4 1025.1 1028.4 1022.6 1017.3 1016.6 1034.9 1039.4 1028.7 1030.5 1028.9 1039.4 DAY-HOUR 15- 6 17- 6 5- 6 3- 6 20- 6 8- 3 28- 6 7-18 5- 0 20- 6 15- 6 25- 6 MIN. QNH PRESSURE IN HPA 1013.5 1006.7 1003.5 1009.4 1009.2 1005.1 1003.4 1002.3 1004.0 1010.3 1008.7 1008.5 1002.3 DAY-HOUR 5-12 10-15 18-15 23- 9 17-15 24-15 17-15 15-15 9-15 2-12 28-15 23-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 997.1 1000.6 1006.7 1013.6 1021.3 1023.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.6 1023.1 1029.7 1025.5 1032.8 1032.9 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 29- 3 7-18 5- 0 20- 6 15- 6 25- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 990.7 989.7 993.8 1001.8 1007.3 1008.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** 1-15 15-15 10- 0 2-12 28-21 23-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 873.4 874.9 879.1 881.3 884.3 883.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 877.9 880.4 899.7 889.0 890.6 889.3 ****** DAY ** ** ** ** ** ** 29 30 5 21 15 5 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 868.9 869.1 868.5 874.9 872.4 876.1 ****** DAY ** ** ** ** ** ** 17 15 10 4 29 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1009.8 1011.6 1016.3 1018.8 1022.1 1021.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1014.9 1017.7 1039.4 1027.4 1029.2 1027.7 ****** DAY ** ** ** ** ** ** 29 30 5 21 15 5 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.8 1005.0 1004.3 1011.5 1008.7 1012.9 ****** DAY ** ** ** ** ** ** 17 15 10 4 29 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 997.1 1000.1 1006.8 1013.1 1020.9 1023.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1003.1 1008.2 1029.7 1024.1 1030.6 1031.3 ****** DAY ** ** ** ** ** ** 29 30 5 21 15 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.9 992.2 993.8 1003.8 1008.2 1012.9 ****** DAY ** ** ** ** ** ** 17 16 10 4 29 23 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 883.0 879.8 879.2 880.6 878.6 876.1 873.9 875.9 879.4 881.7 884.5 883.3 879.7 MAX. QFE PRESSURE IN HPA 893.4 887.3 886.4 888.2 883.8 880.0 878.8 881.2 886.6 889.0 890.2 889.4 893.4 DAY 15 17 5 6 20 8 29 31 19 21 15 25 MIN. QFE PRESSURE IN HPA 877.8 872.1 871.1 873.7 875.1 871.0 870.0 869.7 869.3 874.6 873.6 874.6 869.3 DAY 5 7 27 20 17 25 17 15 10 4 29 23 MEAN QNH PRESSURE IN HPA 1020.7 1017.0 1016.3 1017.9 1015.7 1012.9 1010.4 1012.7 1016.7 1019.2 1022.4 1020.9 1016.9 MAX. QNH PRESSURE IN HPA 1032.3 1025.5 1024.5 1026.5 1021.5 1017.3 1015.9 1018.6 1024.7 1027.4 1028.7 1027.8 1032.3 DAY 15 17 5 6 20 8 29 31 19 21 15 25 MIN. QNH PRESSURE IN HPA 1014.8 1008.4 1007.3 1010.2 1011.8 1007.2 1006.0 1005.7 1005.2 1011.2 1010.1 1011.2 1005.2 DAY 5 7 27 20 17 25 17 15 10 4 29 23 MEAN QFF PRESSURE IN HPA 1023.6 1018.8 1015.2 1012.9 1008.3 1002.3 997.9 1001.8 1008.0 1014.7 1022.2 1023.8 1012.5 MAX. QFF PRESSURE IN HPA 1037.6 1027.6 1026.6 1024.1 1013.3 1007.8 1004.6 1010.0 1016.4 1025.2 1030.7 1032.2 1037.6 DAY 15 17 5 3 20 8 29 31 19 21 15 26 MIN. QFF PRESSURE IN HPA 1011.8 1009.7 1002.1 1003.0 1003.6 995.5 993.7 993.3 995.6 1004.9 1011.3 1011.5 993.3 DAY 5 11 27 20 31 25 17 15 10 4 29 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 884.1 880.7 880.1 881.3 879.2 876.7 874.7 876.7 880.6 882.9 885.7 884.4 880.6 MAX. QFE PRESSURE IN HPA 894.9 889.0 887.0 889.9 884.7 880.0 879.4 882.6 887.8 890.2 891.8 890.3 894.9 DAY 15 17 5 3 20 8 28 31 19 20 15 25 MIN. QFE PRESSURE IN HPA 878.9 873.0 871.2 874.3 875.6 871.7 870.9 870.0 871.1 875.7 874.5 875.0 870.0 DAY 28 7 27 23 17 25 2 15 10 4 29 23 MEAN QNH PRESSURE IN HPA 1021.9 1018.1 1017.4 1018.8 1016.4 1013.5 1011.3 1013.6 1017.9 1020.6 1023.7 1022.3 1017.9 MAX. QNH PRESSURE IN HPA 1034.0 1027.4 1025.1 1028.4 1022.6 1017.3 1016.6 1020.2 1026.0 1028.7 1030.5 1028.9 1034.0 DAY 15 17 5 3 20 8 28 31 19 20 15 25 MIN. QNH PRESSURE IN HPA 1016.0 1009.4 1007.4 1010.9 1012.3 1007.9 1007.0 1006.0 1007.3 1012.4 1011.1 1011.6 1006.0 DAY 28 7 27 23 17 25 2 15 10 4 29 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 999.2 1002.4 1008.6 1015.2 1023.0 1024.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.5 1010.7 1017.6 1025.5 1032.8 1032.9 ****** DAY ** ** ** ** ** ** 29 31 19 20 15 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 994.9 993.2 997.3 1004.9 1012.2 1011.8 ****** DAY ** ** ** ** ** ** 16 15 10 2 29 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 883.1 880.1 879.0 880.6 878.6 875.9 874.0 875.9 879.7 881.9 884.6 883.7 879.8 MAX. QFE PRESSURE IN HPA 892.8 888.5 885.9 888.4 884.0 879.0 878.9 881.0 887.7 889.4 890.4 889.9 892.8 DAY 15 17 5 3 19 8 28 31 18 20 14 25 MIN. QFE PRESSURE IN HPA 877.0 872.9 869.8 873.0 875.3 871.2 870.2 868.8 870.4 875.2 874.5 873.4 868.8 DAY 5 7 27 23 17 24 17 15 10 4 29 23 MEAN QNH PRESSURE IN HPA 1020.8 1017.4 1016.2 1017.9 1015.7 1012.6 1010.5 1012.6 1016.9 1019.5 1022.5 1021.5 1017.0 MAX. QNH PRESSURE IN HPA 1031.7 1026.8 1023.9 1026.7 1021.8 1016.2 1016.0 1018.4 1025.9 1027.8 1029.0 1028.4 1031.7 DAY 15 17 5 3 19 8 28 31 18 20 14 25 MIN. QNH PRESSURE IN HPA 1013.9 1009.3 1005.8 1009.4 1012.0 1007.4 1006.3 1004.7 1006.5 1011.9 1011.1 1009.8 1004.7 DAY 5 7 27 23 17 24 17 15 10 4 29 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 998.3 1001.3 1007.3 1013.7 1021.2 1023.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1003.7 1008.9 1016.9 1024.2 1029.7 1031.7 ****** DAY ** ** ** ** ** ** 28 31 18 20 14 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 993.3 991.7 995.7 1002.8 1011.5 1009.6 ****** DAY ** ** ** ** ** ** 17 15 10 2 28 23 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 882.2 879.0 877.7 879.0 877.1 874.3 872.3 874.1 877.9 880.5 883.5 882.8 878.4 MAX. QFE PRESSURE IN HPA 892.2 887.7 884.0 886.6 882.8 877.8 877.3 879.1 885.5 888.0 889.9 889.0 892.2 DAY 14 17 5 3 19 7 28 31 18 20 14 25 MIN. QFE PRESSURE IN HPA 876.6 871.5 868.1 873.1 873.9 869.7 868.4 867.3 868.9 873.8 873.8 872.2 867.3 DAY 5 6 27 23 17 24 17 15 10 2 28 23 MEAN QNH PRESSURE IN HPA 1019.8 1016.1 1014.6 1016.1 1014.0 1010.9 1008.6 1010.7 1015.0 1017.9 1021.2 1020.4 1015.4 MAX. QNH PRESSURE IN HPA 1031.0 1025.9 1021.8 1024.7 1020.4 1014.8 1014.2 1016.3 1023.5 1026.3 1028.4 1027.4 1031.0 DAY 14 17 5 3 19 7 28 31 18 20 14 25 MIN. QNH PRESSURE IN HPA 1013.5 1007.7 1003.9 1009.5 1010.4 1005.7 1004.2 1003.0 1004.8 1010.3 1010.3 1008.5 1003.0 DAY 5 6 27 23 17 24 17 15 10 2 28 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 996.4 999.3 1005.4 1012.4 1020.0 1022.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1001.7 1006.7 1014.1 1022.7 1029.3 1030.9 ****** DAY ** ** ** ** ** ** 28 31 18 20 14 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.4 990.2 994.1 1001.8 1009.4 1008.2 ****** DAY ** ** ** ** ** ** 17 15 9 2 28 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 882.4 878.7 877.5 878.9 877.1 873.9 871.6 873.6 877.6 880.5 883.6 883.1 878.2 MAX. QFE PRESSURE IN HPA 892.5 887.8 884.0 886.2 882.8 877.9 876.6 878.5 885.4 888.0 890.4 889.4 892.5 DAY 14 17 5 3 20 7 28 30 18 20 14 25 MIN. QFE PRESSURE IN HPA 877.0 870.6 867.8 873.2 872.8 869.2 867.7 866.7 868.2 873.8 872.4 874.1 866.7 DAY 27 10 18 14 17 24 17 15 9 2 28 23 MEAN QNH PRESSURE IN HPA 1020.0 1015.9 1014.4 1016.0 1014.0 1010.4 1007.9 1010.1 1014.6 1017.8 1021.3 1020.8 1015.3 MAX. QNH PRESSURE IN HPA 1031.3 1026.0 1021.8 1024.2 1020.4 1014.9 1013.5 1015.6 1023.3 1026.3 1029.0 1027.8 1031.3 DAY 14 17 5 3 20 7 28 30 18 20 14 25 MIN. QNH PRESSURE IN HPA 1013.9 1006.7 1003.5 1009.6 1009.2 1005.1 1003.4 1002.3 1004.0 1010.3 1008.7 1010.6 1002.3 DAY 27 10 18 14 17 24 17 15 9 2 28 23 MEAN QFF PRESSURE IN HPA 1022.8 1017.5 1013.2 1010.9 1006.6 999.8 995.3 999.1 1005.9 1013.4 1021.2 1023.6 1010.8 MAX. QFF PRESSURE IN HPA 1036.0 1027.9 1023.3 1021.8 1012.5 1005.3 1001.6 1006.7 1015.2 1023.6 1030.5 1032.4 1036.0 DAY 14 17 5 3 19 3 28 30 18 20 14 25 MIN. QFF PRESSURE IN HPA 1011.2 1007.4 999.4 1002.2 1001.3 993.0 990.7 989.7 994.1 1002.8 1008.6 1011.3 989.7 DAY 5 10 27 14 17 24 1 15 9 2 28 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 872.7 875.2 878.4 881.3 884.3 883.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 877.5 895.7 886.7 888.6 890.7 889.8 ****** DAY ** ** ** ** ** ** 28 7 18 20 14 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 868.1 867.4 868.7 875.0 873.3 875.8 ****** DAY ** ** ** ** ** ** 17 15 9 9 28 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1009.1 1011.9 1015.5 1018.7 1022.1 1021.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1014.5 1034.9 1024.8 1026.9 1029.3 1028.3 ****** DAY ** ** ** ** ** ** 28 7 18 20 14 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1003.9 1003.1 1004.6 1011.6 1009.7 1012.6 ****** DAY ** ** ** ** ** ** 17 15 9 9 28 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 996.5 1000.7 1006.2 1013.4 1021.5 1024.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1002.5 1023.1 1016.2 1023.9 1030.9 1032.4 ****** DAY ** ** ** ** ** ** 28 7 18 20 14 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.5 989.9 994.3 1003.9 1008.8 1013.6 ****** DAY ** ** ** ** ** ** 17 15 9 2 28 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 873.1 875.0 878.5 881.4 884.4 884.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 877.5 880.2 886.7 888.8 890.9 889.8 ****** DAY ** ** ** ** ** ** 28 29 18 20 14 24 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 868.7 868.5 868.7 875.1 872.4 877.0 ****** DAY ** ** ** ** ** ** 16 15 9 4 28 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1009.6 1011.6 1015.6 1018.8 1022.2 1021.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1014.5 1017.5 1024.8 1027.2 1029.5 1028.3 ****** DAY ** ** ** ** ** ** 28 29 18 20 14 24 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1004.6 1004.3 1004.6 1011.8 1008.7 1013.9 ****** DAY ** ** ** ** ** ** 16 15 9 4 28 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 996.8 1000.3 1006.0 1013.1 1021.0 1023.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 1002.1 1008.1 1015.7 1023.8 1030.9 1031.7 ****** DAY ** ** ** ** ** ** 28 30 18 20 14 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** 991.6 991.0 994.2 1003.8 1007.3 1014.6 ****** DAY ** ** ** ** ** ** 16 15 9 4 28 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.8 2.7 6.4 15.1 21.2 27.9 31.5 30.1 26.0 18.1 9.6 5.3 16.6 MINIMUN AIR TEMPERATURE (C) 1.1 -0.6 2.2 10.1 15.8 22.1 25.5 24.5 20.4 12.7 5.1 2.0 11.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 22 29 31 12 0 0 0 95 DAYS WITH MINIMUM TEMP. <=-4 1 5 2 0 0 0 0 0 0 0 0 0 8 DAYS WITH FREEZING MIN.<= 0 14 21 8 0 0 0 0 0 0 0 1 6 50 TEMPERATURE RECORDS LOWEST(C) -5.0 -7.0 -8.0 5.0 12.0 16.0 20.0 21.0 16.0 5.0 -1.0 -2.0 -8.0 DAY 3 17 2 6 8 6 5 26 23 31 30 24 MAXIMUM AIR TEMPERATURE (C) 9.8 6.8 10.8 20.3 26.7 33.4 36.8 35.6 31.7 23.6 15.3 9.9 21.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 28 31 31 22 0 0 0 115 DAYS WITH MAXIMUM TEMP. <= 0 0 0 1 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 14.0 15.0 19.0 26.0 32.0 38.0 40.0 40.0 37.0 29.0 23.0 16.0 40.0 DAY 23 8 31 14 31 25 16 1 4 1 5 5 DIF. BETWEEN (MAX.-MIN.) (C) 8.7 7.4 8.6 10.2 10.9 11.3 11.3 11.1 11.3 10.9 10.2 7.9 10.0 MEAN DAILY TEMP. (MDT) (C) 5.5 3.1 6.5 15.2 21.2 27.7 31.1 30.0 26.0 18.2 10.2 6.0 16.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 26.5 202.0 313.5 280.0 151.5 4.5 0.0 0.0 978.0 HEATING DEG. DAYS(BASE 18 0C) 389.0 432.0 356.0 89.5 0.5 0.0 0.0 0.0 0.0 32.5 233.0 373.0 1905.5 DEWPOINT (MEAN C) -3.2 -5.5 -1.3 2.0 4.7 5.9 10.0 4.3 4.7 3.3 -3.0 -1.8 1.7 MIXING RATIO (G/KG) 3.62 3.07 4.12 5.24 6.29 6.84 9.08 6.26 6.33 5.60 3.74 3.89 5.34 VAPOUR PRESSURE (HPA) 5.08 4.31 5.78 7.34 8.79 9.52 12.54 8.71 8.85 7.86 5.29 5.49 7.46 SATURATION DEF. (HPA) 3.80 3.32 4.31 10.58 17.13 29.24 34.85 34.96 25.74 13.68 7.14 3.68 15.70 RELATIVE HUMIDITY (MEAN %) 58 58 61 45 37 27 29 21 27 40 44 63 43 RELATIVE HUMIDITY (MAX. %) 76 78 80 65 55 39 39 31 36 55 58 76 57 RELATIVE HUMIDITY (MIN. %) 41 41 44 29 23 17 21 14 20 28 29 47 30 RELATIVE HUMIDITY (MEAN% 03UTC) 62 67 72 57 47 35 36 27 33 50 53 69 51 RELATIVE HUMIDITY (MEAN% 09UTC) 48 51 53 36 29 23 24 17 24 32 32 52 35 RELATIVE HUMIDITY (MEAN% 15UTC) 59 55 53 39 30 20 23 17 24 35 45 65 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 29.0 51.7 52.6 37.3 28.0 13.2 0.0 0.0 0.0 16.0 14.0 46.7 288.5 DAYS WITH PRECIPITATION >=10 1 2 2 1 0 0 0 0 0 0 0 2 8 DAYS WITH PRECIPITATION >= 5 3 3 3 2 3 2 0 0 0 1 1 4 22 DAYS WITH PRECIPITATION >= 1 5 8 8 6 7 3 0 0 0 4 3 6 50 DAYS WITH PRECIPITATION 6 9 12 11 9 4 0 0 3 8 3 9 74 GREATEST DAILY PRECIPITATION 14.0 24.0 22.0 18.0 9.0 5.2 0.0 0.0 0.0 8.0 8.0 20.0 24.0 DAY 19 10 22 8 21 6 ** ** ** 31 27 31 DAY WITH THUNDER STORM 1 0 0 3 8 2 0 0 2 2 2 0 20 DAYS WITH SNOW OR SLEET 0 4 4 0 0 0 0 0 0 0 0 4 12 DAYS WITH DUST 6 5 12 2 7 7 9 4 2 3 4 5 66 WIND DIRECTION (PREVAILING) 45 45 45 45 45 45 225 225 45 45 225 45 45 PREVAILING WIND SPEED(KNOTS) 5.4 6.3 6.3 6.6 7.3 6.1 6.9 6.7 6.2 6.2 6.4 6.5 6.2 PREVAILING WIND PERCENT 9.7 11.6 11.3 14.2 17.7 15.4 15.7 16.1 20.4 12.9 9.2 5.2 12.5 CALMS PERCENT OF WIND 71.4 63.4 48.8 41.7 35.5 42.1 48.8 51.2 40.8 56.5 77.9 83.5 55.1 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 149 229 177 244 241 226 190 203 210 249 190 126 219 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.3 0.7 1.4 1.5 1.4 1.1 0.8 0.5 1.1 0.5 0.2 0.7 WIND STEADINESES (MEAN %) 11.1 10.7 20.6 28.6 24.2 30.4 34.4 27.6 11.9 33.3 38.5 22.2 21.2 WIND SPEED (MEAN KNOTS) 1.8 2.8 3.4 4.9 6.2 4.6 3.2 2.9 4.2 3.3 1.3 0.9 3.3 FASTEST WIND DIRECTION 240 270 260 250 270 260 240 240 240 270 210 30 270 FASTEST WIND SPEED (KNOTS) 20 30 15 25 35 30 15 12 26 24 18 18 35 DAY 15 14 2 13 7 17 4 7 23 16 28 22 DAYS WITH SKY CLEAR (0-2)/8 18 13 10 5 12 25 24 28 27 17 22 11 212 DAYS WITH P.CLOUDY (3-6)/8 9 8 9 14 15 3 6 3 3 9 6 9 94 DAYS WITH CLOUDY (7-8)/8 4 8 12 11 4 2 1 0 0 5 2 11 60 DAYS WITH VISIBILITY =< 2 KM 1 3 5 0 0 0 0 0 0 0 1 6 16 DURATION OF SUNSHINE HOURS 166.5 100.4 116.5 ****** 290.5 337.0 323.1 319.9 296.4 150.0 206.0 121.3 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 879.6 879.7 879.0 878.7 877.9 876.1 871.7 875.6 878.5 880.8 886.2 884.0 879.0 MAX. QFE PRESSURE IN HPA 887.6 890.7 886.7 885.2 883.6 880.9 877.4 879.9 885.2 891.9 893.5 891.0 893.5 DAY-HOUR 1- 6 21- 6 27- 6 4- 9 1-21 21- 6 23- 6 27- 6 11- 6 31-18 12- 6 16- 6 MIN. QFE PRESSURE IN HPA 870.6 869.1 870.6 875.2 869.8 871.2 862.1 870.8 874.0 874.8 873.3 871.5 862.1 DAY-HOUR 6-21 10-18 17-12 9-12 27-15 30-15 18-18 30-15 2-15 17-12 28-15 10-15 MEAN QNH PRESSURE IN HPA 1016.8 1016.9 1016.1 1015.8 1014.9 1012.9 1008.0 1012.3 1015.6 1018.2 1024.2 1021.7 1016.1 MAX. QNH PRESSURE IN HPA 1025.8 1029.3 1024.8 1023.1 1021.3 1018.3 1014.4 1017.2 1023.1 1030.7 1032.5 1029.6 1032.5 DAY-HOUR 1- 6 21- 6 27- 6 4- 9 1-21 21- 6 23- 6 27- 6 11- 6 31-18 12- 6 16- 6 MIN. QNH PRESSURE IN HPA 1006.7 1005.0 1006.7 1011.9 1005.8 1007.4 997.1 1006.9 1010.5 1011.4 1009.7 1007.7 997.1 DAY-HOUR 6-21 10-18 17-12 9-12 27-15 30-15 18-18 30-15 2-15 17-12 28-15 10-15 MEAN QFF PRESSURE IN HPA 1018.0 1019.2 1016.4 1011.6 1007.7 1002.6 995.8 1001.0 1006.2 1012.5 1023.1 1022.7 1011.4 MAX. QFF PRESSURE IN HPA 1029.6 1033.8 1024.8 1022.1 1016.4 1008.0 1003.9 1007.2 1014.0 1031.7 1032.5 1029.9 1033.8 DAY-HOUR 1- 6 20- 6 3-18 4- 3 14- 9 14- 6 23- 3 27- 6 30- 6 31-18 14- 6 13- 6 MIN. QFF PRESSURE IN HPA 1006.8 1004.0 1003.7 1006.1 997.1 994.9 984.5 995.0 999.6 1004.6 1007.7 1007.8 984.5 DAY-HOUR 6-21 10-18 21-12 24-12 27-15 30-21 18-18 1-15 2-15 17-12 28-12 10-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 879.7 879.5 878.7 878.4 877.8 876.3 871.9 875.6 878.4 880.5 886.0 883.9 878.9 MAX. QFE PRESSURE IN HPA 885.3 889.2 884.9 884.0 881.0 879.6 876.4 878.2 883.4 888.9 892.1 889.6 892.1 DAY 1 21 27 4 13 27 23 27 13 31 14 16 MIN. QFE PRESSURE IN HPA 871.6 869.7 871.5 875.4 872.0 874.3 867.7 872.6 874.7 875.7 873.9 874.5 867.7 DAY 7 11 22 18 28 3 4 31 1 18 29 11 MEAN QNH PRESSURE IN HPA 1017.0 1016.7 1015.9 1015.5 1014.8 1013.1 1008.1 1012.3 1015.5 1017.8 1024.0 1021.7 1016.0 MAX. QNH PRESSURE IN HPA 1023.2 1027.6 1022.8 1021.8 1018.4 1016.8 1013.2 1015.3 1021.1 1027.3 1030.9 1028.1 1030.9 DAY 1 21 27 4 13 27 23 27 13 31 14 16 MIN. QNH PRESSURE IN HPA 1007.8 1005.7 1007.7 1012.1 1008.3 1010.9 1003.4 1008.9 1011.3 1012.4 1010.4 1011.1 1003.4 DAY 7 11 22 18 28 3 4 31 1 18 29 11 MEAN QFF PRESSURE IN HPA 1017.8 1018.6 1016.0 1011.2 1007.5 1002.8 995.9 1000.8 1005.8 1011.7 1022.4 1022.3 1011.1 MAX. QFF PRESSURE IN HPA 1026.5 1031.6 1022.7 1021.1 1012.5 1006.3 1002.9 1005.2 1011.7 1027.6 1030.7 1027.8 1031.6 DAY 1 21 28 4 13 9 23 27 29 31 14 14 MIN. QFF PRESSURE IN HPA 1009.6 1005.7 1006.2 1007.1 999.4 999.3 991.6 995.9 1000.3 1006.2 1008.6 1011.2 991.6 DAY 7 11 22 19 28 30 4 1 1 18 29 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 879.6 879.7 878.9 878.9 878.5 876.9 872.6 876.4 879.0 881.1 886.4 884.0 879.3 MAX. QFE PRESSURE IN HPA 885.3 889.2 885.2 884.7 881.9 880.0 877.1 878.8 883.8 890.0 892.6 889.6 892.6 DAY 1 21 27 4 13 21 23 27 13 31 13 16 MIN. QFE PRESSURE IN HPA 872.9 870.1 871.8 876.3 875.1 874.3 868.6 873.4 875.8 877.0 875.7 875.9 868.6 DAY 13 11 22 18 7 6 3 1 5 18 29 11 MEAN QNH PRESSURE IN HPA 1016.9 1017.0 1016.0 1016.0 1015.6 1013.8 1008.9 1013.2 1016.2 1018.5 1024.5 1021.8 1016.5 MAX. QNH PRESSURE IN HPA 1023.2 1027.6 1023.1 1022.6 1019.4 1017.3 1014.0 1015.9 1021.5 1028.5 1031.4 1028.1 1031.4 DAY 1 21 27 4 13 21 23 27 13 31 13 16 MIN. QNH PRESSURE IN HPA 1009.3 1006.1 1008.1 1013.1 1011.8 1010.9 1004.4 1009.8 1012.6 1013.9 1012.4 1012.7 1004.4 DAY 13 11 22 18 7 6 3 1 5 18 29 11 MEAN QFF PRESSURE IN HPA 1018.7 1019.7 1016.8 1012.3 1008.7 1003.6 996.9 1002.2 1007.3 1013.4 1024.1 1023.2 1012.2 MAX. QFF PRESSURE IN HPA 1027.3 1032.5 1023.9 1022.1 1013.3 1006.9 1003.9 1006.6 1013.7 1028.5 1032.2 1028.7 1032.5 DAY 1 20 28 4 13 14 23 27 30 31 14 14 MIN. QFF PRESSURE IN HPA 1012.3 1006.3 1006.9 1007.9 1004.1 999.5 992.3 996.5 1001.6 1008.6 1011.9 1013.5 992.3 DAY 13 11 21 19 27 30 3 1 5 18 29 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 880.8 880.9 880.1 879.7 879.1 877.5 873.0 877.2 880.1 882.2 887.5 885.0 880.3 MAX. QFE PRESSURE IN HPA 887.6 890.7 886.7 885.1 882.4 880.9 877.4 879.9 885.2 891.7 893.5 891.0 893.5 DAY 1 21 27 4 2 21 23 27 11 31 12 16 MIN. QFE PRESSURE IN HPA 874.4 871.5 873.1 877.0 875.1 874.5 868.7 874.1 876.5 877.8 876.6 878.0 868.7 DAY 13 5 22 9 7 6 3 31 5 18 29 11 MEAN QNH PRESSURE IN HPA 1018.2 1018.3 1017.4 1016.9 1016.2 1014.5 1009.5 1014.1 1017.3 1019.8 1025.7 1022.9 1017.6 MAX. QNH PRESSURE IN HPA 1025.8 1029.3 1024.8 1023.0 1020.0 1018.3 1014.4 1017.2 1023.1 1030.4 1032.5 1029.6 1032.5 DAY 1 21 27 4 2 21 23 27 11 31 12 16 MIN. QNH PRESSURE IN HPA 1011.0 1007.7 1009.5 1013.9 1011.8 1011.1 1004.6 1010.6 1013.3 1014.8 1013.5 1015.0 1004.6 DAY 13 5 22 9 7 6 3 31 5 18 29 11 MEAN QFF PRESSURE IN HPA 1019.6 1020.8 1017.9 1012.7 1009.0 1004.1 997.3 1002.7 1007.8 1014.1 1024.7 1024.3 1012.9 MAX. QFF PRESSURE IN HPA 1029.6 1033.8 1024.7 1021.8 1014.0 1008.0 1003.6 1007.2 1014.0 1030.8 1032.5 1029.9 1033.8 DAY 1 20 3 4 2 14 23 27 30 31 14 13 MIN. QFF PRESSURE IN HPA 1013.4 1007.9 1008.5 1009.0 1003.7 999.1 992.4 997.8 1001.9 1008.4 1012.5 1015.4 992.4 DAY 13 5 21 18 27 30 3 1 5 18 29 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 879.8 880.3 879.6 879.1 878.5 876.9 872.6 876.3 879.3 881.3 886.6 884.1 879.5 MAX. QFE PRESSURE IN HPA 886.9 890.0 885.9 885.2 883.5 880.7 876.5 879.1 884.4 891.7 892.6 890.2 892.6 DAY 1 20 27 4 14 26 22 26 11 31 12 16 MIN. QFE PRESSURE IN HPA 873.3 871.1 872.7 876.2 874.0 873.9 868.1 873.4 875.9 876.3 875.8 876.3 868.1 DAY 13 5 14 9 27 5 3 31 2 29 28 10 MEAN QNH PRESSURE IN HPA 1017.0 1017.6 1016.9 1016.3 1015.6 1013.8 1008.9 1013.1 1016.4 1018.7 1024.7 1021.9 1016.7 MAX. QNH PRESSURE IN HPA 1025.0 1028.5 1023.9 1023.1 1021.2 1018.1 1013.3 1016.3 1022.2 1030.4 1031.4 1028.7 1031.4 DAY 1 20 27 4 14 26 22 26 11 31 12 16 MIN. QNH PRESSURE IN HPA 1009.7 1007.3 1009.1 1013.0 1010.5 1010.4 1003.9 1009.8 1012.7 1013.1 1012.6 1013.1 1003.9 DAY 13 5 14 9 27 5 3 31 2 29 28 10 MEAN QFF PRESSURE IN HPA 1017.9 1019.7 1016.9 1011.8 1008.1 1003.3 996.6 1001.6 1006.7 1012.6 1023.1 1022.5 1011.7 MAX. QFF PRESSURE IN HPA 1028.3 1032.8 1023.9 1021.5 1016.4 1006.7 1003.2 1006.5 1012.4 1030.5 1031.1 1027.9 1032.8 DAY 1 20 3 4 14 14 22 26 29 31 13 20 MIN. QFF PRESSURE IN HPA 1011.5 1007.8 1006.8 1007.9 1001.9 998.6 991.7 996.5 1001.2 1006.8 1009.5 1012.9 991.7 DAY 13 5 21 17 27 30 3 1 2 17 28 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 878.7 878.7 878.1 877.9 877.2 875.4 871.1 874.7 877.6 879.8 885.3 883.1 878.1 MAX. QFE PRESSURE IN HPA 885.4 888.5 884.3 884.1 880.9 879.3 875.8 877.7 881.6 890.0 891.4 889.7 891.4 DAY 1 20 27 3 2 26 22 26 11 31 1 16 MIN. QFE PRESSURE IN HPA 873.7 869.9 870.6 875.2 870.2 872.3 866.5 871.6 874.5 874.8 874.1 874.3 866.5 DAY 31 10 17 9 27 6 3 30 2 17 28 10 MEAN QNH PRESSURE IN HPA 1015.8 1015.8 1015.1 1015.0 1014.1 1012.1 1007.2 1011.3 1014.6 1017.0 1023.2 1020.8 1015.2 MAX. QNH PRESSURE IN HPA 1023.3 1026.8 1022.1 1021.9 1018.3 1016.5 1012.6 1014.7 1019.1 1028.5 1030.1 1028.2 1030.1 DAY 1 20 27 3 2 26 22 26 11 31 1 16 MIN. QNH PRESSURE IN HPA 1010.2 1005.9 1006.7 1011.9 1006.3 1008.6 1002.1 1007.8 1011.1 1011.4 1010.6 1010.9 1002.1 DAY 31 10 17 9 27 6 3 30 2 17 28 10 MEAN QFF PRESSURE IN HPA 1016.4 1017.8 1015.1 1010.6 1006.9 1001.8 994.9 999.9 1004.8 1011.0 1021.6 1021.4 1010.2 MAX. QFF PRESSURE IN HPA 1025.9 1030.9 1022.5 1020.8 1012.4 1005.5 1003.0 1004.9 1011.2 1028.6 1029.5 1027.4 1030.9 DAY 1 20 8 3 2 14 22 26 30 31 13 16 MIN. QFF PRESSURE IN HPA 1010.0 1006.6 1003.7 1006.1 997.4 996.6 989.6 995.4 999.7 1004.6 1007.7 1010.2 989.6 DAY 31 10 21 24 27 30 3 1 2 17 28 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 879.1 879.1 878.3 878.1 876.9 874.6 870.3 874.1 877.3 879.9 885.4 883.4 878.0 MAX. QFE PRESSURE IN HPA 885.6 888.8 883.8 883.7 880.9 878.6 875.2 876.7 881.5 890.0 892.1 889.7 892.1 DAY 9 20 26 3 2 26 22 26 11 31 13 16 MIN. QFE PRESSURE IN HPA 872.9 869.8 871.9 875.7 869.8 871.2 865.6 870.8 874.0 874.8 873.3 871.5 865.6 DAY 6 10 21 1 27 30 3 30 2 17 28 10 MEAN QNH PRESSURE IN HPA 1016.2 1016.2 1015.3 1015.1 1013.8 1011.2 1006.3 1010.6 1014.2 1017.2 1023.3 1021.1 1015.1 MAX. QNH PRESSURE IN HPA 1023.6 1027.2 1021.5 1021.4 1018.3 1015.7 1011.9 1013.6 1019.0 1028.5 1030.9 1028.2 1030.9 DAY 9 20 26 3 2 26 22 26 11 31 13 16 MIN. QNH PRESSURE IN HPA 1009.3 1005.8 1008.2 1012.4 1005.8 1007.4 1001.1 1006.9 1010.5 1011.4 1009.7 1007.7 1001.1 DAY 6 10 21 1 27 30 3 30 2 17 28 10 MEAN QFF PRESSURE IN HPA 1017.8 1019.0 1016.0 1011.4 1006.8 1001.0 994.3 999.6 1005.3 1012.2 1022.9 1022.5 1010.7 MAX. QFF PRESSURE IN HPA 1026.8 1032.0 1022.9 1020.7 1012.7 1004.8 1002.2 1004.0 1011.5 1028.9 1031.4 1029.2 1032.0 DAY 1 20 8 3 2 14 22 26 29 31 13 13 MIN. QFF PRESSURE IN HPA 1011.1 1004.8 1004.9 1007.1 997.1 995.1 988.5 995.0 999.6 1005.8 1008.2 1007.8 988.5 DAY 6 10 21 17 27 30 3 1 2 17 28 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 879.7 879.7 879.2 878.9 877.8 875.6 871.1 875.3 878.3 881.0 886.4 884.2 878.9 MAX. QFE PRESSURE IN HPA 885.8 889.1 885.5 884.5 881.8 878.2 876.3 878.0 882.6 891.9 893.1 890.2 893.1 DAY 1 20 26 3 13 14 22 26 11 31 14 16 MIN. QFE PRESSURE IN HPA 871.2 869.1 872.8 876.1 871.7 872.6 862.1 872.2 874.7 875.7 874.9 874.5 862.1 DAY 6 10 21 17 27 30 18 30 2 17 28 10 MEAN QNH PRESSURE IN HPA 1016.9 1016.9 1016.4 1016.0 1014.8 1012.3 1007.3 1012.0 1015.3 1018.4 1024.5 1022.0 1016.1 MAX. QNH PRESSURE IN HPA 1023.8 1027.5 1023.5 1022.3 1019.3 1015.3 1013.1 1015.0 1020.2 1030.7 1032.0 1028.7 1032.0 DAY 1 20 26 3 13 14 22 26 11 31 14 16 MIN. QNH PRESSURE IN HPA 1007.4 1005.0 1009.2 1012.9 1007.9 1008.9 997.1 1008.5 1011.3 1012.4 1011.5 1011.1 997.1 DAY 6 10 21 17 27 30 18 30 2 17 28 10 MEAN QFF PRESSURE IN HPA 1018.2 1019.4 1016.7 1011.7 1007.4 1002.0 995.1 1000.6 1005.9 1012.8 1023.5 1023.3 1011.4 MAX. QFF PRESSURE IN HPA 1027.4 1032.3 1024.8 1021.5 1012.8 1006.2 1002.9 1005.4 1012.5 1031.7 1032.2 1029.9 1032.3 DAY 1 20 3 3 13 14 22 26 29 31 14 13 MIN. QFF PRESSURE IN HPA 1008.2 1004.0 1007.5 1007.5 999.3 996.4 984.5 997.1 1000.3 1006.3 1009.2 1011.8 984.5 DAY 6 10 21 17 27 30 18 1 2 17 28 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 879.7 879.7 879.1 878.8 877.8 875.9 871.6 875.5 878.5 881.1 886.0 884.0 879.0 MAX. QFE PRESSURE IN HPA 886.2 889.7 884.8 883.9 883.6 878.9 876.3 878.1 882.8 891.9 892.4 889.8 892.4 DAY 9 20 26 3 1 26 22 26 12 31 14 16 MIN. QFE PRESSURE IN HPA 870.6 869.2 871.4 876.0 871.0 871.8 867.2 872.5 875.2 875.7 873.9 874.5 867.2 DAY 6 10 21 17 27 30 3 30 2 17 28 10 MEAN QNH PRESSURE IN HPA 1017.0 1016.9 1016.3 1016.0 1014.8 1012.7 1007.8 1012.2 1015.6 1018.5 1024.0 1021.7 1016.1 MAX. QNH PRESSURE IN HPA 1024.2 1028.2 1022.7 1021.7 1021.3 1016.0 1013.1 1015.1 1020.4 1030.7 1031.2 1028.3 1031.2 DAY 9 20 26 3 1 26 22 26 12 31 14 16 MIN. QNH PRESSURE IN HPA 1006.7 1005.1 1007.6 1012.8 1007.2 1008.1 1002.9 1008.8 1011.9 1012.4 1010.4 1011.1 1002.9 DAY 6 10 21 17 27 30 3 30 2 17 28 10 MEAN QFF PRESSURE IN HPA 1017.8 1019.0 1016.3 1011.4 1007.3 1002.1 995.5 1000.7 1006.0 1012.5 1022.4 1022.3 1011.1 MAX. QFF PRESSURE IN HPA 1026.3 1032.6 1023.9 1021.0 1015.1 1006.6 1002.5 1005.1 1011.7 1031.1 1030.8 1028.1 1032.6 DAY 9 20 3 3 1 8 22 26 29 31 13 13 MIN. QFF PRESSURE IN HPA 1006.8 1004.9 1005.7 1006.9 998.4 994.9 990.4 996.9 1000.4 1005.8 1007.8 1011.5 990.4 DAY 6 10 21 18 27 30 3 1 4 17 28 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.1 7.0 14.9 16.9 22.1 29.9 31.7 30.1 26.1 16.8 10.6 5.7 17.6 MINIMUN AIR TEMPERATURE (C) -3.5 2.0 9.9 12.4 17.2 23.7 26.3 24.6 20.9 12.9 6.7 2.8 13.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 25 31 29 18 0 0 0 107 DAYS WITH MINIMUM TEMP. <=-4 17 2 0 0 0 0 0 0 0 0 0 0 19 DAYS WITH FREEZING MIN.<= 0 29 8 0 0 0 0 0 0 0 0 0 9 46 TEMPERATURE RECORDS LOWEST(C) -8.0 -4.0 4.0 8.0 13.0 16.0 21.0 14.0 19.0 4.0 3.0 -3.0 -8.0 DAY 25 2 6 1 19 1 29 30 1 23 14 27 MAXIMUM AIR TEMPERATURE (C) 2.2 12.8 20.3 21.9 27.3 35.5 37.4 35.7 31.9 22.0 15.9 9.9 22.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 28 31 28 30 4 0 0 125 DAYS WITH MAXIMUM TEMP. <= 0 6 0 0 0 0 0 0 0 0 0 0 0 6 TEMPERATURE RECORDS HIGHEST(C) 6.0 20.0 26.0 28.0 33.0 39.0 40.0 40.0 35.0 32.0 19.0 18.0 40.0 DAY 19 19 19 30 14 17 4 14 11 3 3 4 DIF. BETWEEN (MAX.-MIN.) (C) 5.7 10.8 10.4 9.5 10.1 11.8 11.1 11.1 11.0 9.1 9.2 7.1 9.7 MEAN DAILY TEMP. (MDT) (C) -0.7 7.4 15.1 17.1 22.3 29.6 31.8 30.1 26.4 17.5 11.3 6.3 17.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.5 4.5 49.5 257.5 335.0 283.5 161.0 20.5 0.0 0.0 1112.0 HEATING DEG. DAYS(BASE 18 0C) 578.5 297.0 100.0 53.5 0.5 0.0 0.0 0.0 0.0 81.5 200.5 361.5 1673.0 DEWPOINT (MEAN C) -5.0 -1.2 -1.8 2.5 5.4 7.6 8.5 7.1 3.2 4.3 1.8 -0.8 2.6 MIXING RATIO (G/KG) 3.13 4.06 4.01 5.52 6.66 7.75 8.19 7.55 5.64 6.10 5.07 4.19 5.65 VAPOUR PRESSURE (HPA) 4.41 5.72 5.64 7.71 9.30 10.74 11.31 10.49 7.90 8.57 7.13 5.90 7.90 SATURATION DEF. (HPA) 1.31 4.93 11.87 12.19 17.99 32.68 36.42 33.54 26.69 11.82 5.97 3.61 16.59 RELATIVE HUMIDITY (MEAN %) 77 59 34 43 37 27 25 26 24 49 56 65 44 RELATIVE HUMIDITY (MAX. %) 91 74 49 60 52 39 35 38 32 60 68 80 57 RELATIVE HUMIDITY (MIN. %) 59 44 22 28 24 18 18 18 17 37 42 50 31 RELATIVE HUMIDITY (MEAN% 03UTC) 80 68 45 53 47 35 32 30 28 56 62 70 51 RELATIVE HUMIDITY (MEAN% 09UTC) 70 48 27 35 29 22 23 21 20 41 47 56 37 RELATIVE HUMIDITY (MEAN% 15UTC) 81 56 29 35 31 20 20 21 24 49 55 62 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 59.3 19.5 8.5 52.7 34.3 1.0 6.0 14.0 0.0 47.3 21.0 41.8 305.4 DAYS WITH PRECIPITATION >=10 1 1 0 1 1 0 0 1 0 1 0 1 7 DAYS WITH PRECIPITATION >= 5 5 2 1 2 2 0 1 1 0 3 3 3 23 DAYS WITH PRECIPITATION >= 1 14 3 2 6 8 0 1 1 0 8 5 6 54 DAYS WITH PRECIPITATION 15 5 6 10 14 3 2 2 0 12 5 8 82 GREATEST DAILY PRECIPITATION 11.0 10.0 6.0 33.0 19.0 0.5 6.0 14.0 0.0 20.0 7.0 23.0 33.0 DAY 28 7 27 7 24 1 30 30 ** 26 1 14 DAY WITH THUNDER STORM 0 0 1 6 7 3 2 2 0 3 2 0 26 DAYS WITH SNOW OR SLEET 14 0 0 0 0 0 0 0 0 0 0 3 17 DAYS WITH DUST 4 1 0 3 2 7 18 7 3 3 2 1 51 WIND DIRECTION (PREVAILING) 45 45 270 225 225 225 225 225 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 5.1 5.5 10.3 6.7 8.5 6.6 6.6 6.7 5.8 5.1 5.4 5.4 6.0 PREVAILING WIND PERCENT 3.6 19.6 13.7 12.9 17.7 17.9 20.2 17.3 17.9 12.9 18.3 14.9 12.7 CALMS PERCENT OF WIND 88.3 62.1 46.0 43.8 41.9 43.3 41.5 37.1 50.8 60.5 63.8 68.1 53.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 121 84 261 234 233 218 209 208 167 215 55 37 221 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.4 1.4 1.3 1.3 1.5 2.0 1.1 0.3 0.4 0.3 0.2 0.7 WIND STEADINESES (MEAN %) 16.7 19.0 31.8 27.1 26.0 37.5 52.6 28.2 10.0 14.3 14.3 9.5 21.9 WIND SPEED (MEAN KNOTS) 0.6 2.1 4.4 4.8 5.0 4.0 3.8 3.9 3.0 2.8 2.1 2.1 3.2 FASTEST WIND DIRECTION 70 20 260 250 310 280 180 250 240 220 240 270 310 FASTEST WIND SPEED (KNOTS) 8 12 25 28 35 30 15 18 18 20 30 20 35 DAY 24 25 5 16 14 2 17 18 26 14 13 10 DAYS WITH SKY CLEAR (0-2)/8 8 16 9 7 7 26 26 26 30 15 20 12 202 DAYS WITH P.CLOUDY (3-6)/8 9 10 14 12 16 4 4 5 0 10 8 10 102 DAYS WITH CLOUDY (7-8)/8 14 2 8 11 8 0 1 0 0 6 2 9 61 DAYS WITH VISIBILITY =< 2 KM 15 3 1 0 0 0 0 0 0 2 0 6 27 DURATION OF SUNSHINE HOURS 104.4 ****** 204.9 195.1 206.9 346.5 313.7 ****** 233.7 ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 881.6 883.6 881.6 877.3 878.3 873.6 871.5 875.6 880.1 882.3 882.5 882.3 879.2 MAX. QFE PRESSURE IN HPA 889.1 890.9 890.6 884.1 884.3 880.4 879.8 882.1 885.0 890.1 891.7 890.5 891.7 DAY-HOUR 11- 6 15- 9 10- 6 2- 6 29- 6 6- 6 22- 9 23- 6 29- 6 24- 6 27- 6 13- 6 MIN. QFE PRESSURE IN HPA 874.9 871.8 874.7 868.4 872.9 868.0 866.7 868.0 874.8 874.3 873.7 874.9 866.7 DAY-HOUR 8- 0 7- 0 4-12 24-12 4-15 22-15 2-15 17-15 16-15 5-12 17-21 23-12 MEAN QNH PRESSURE IN HPA 1019.1 1021.4 1019.0 1014.3 1015.4 1010.0 1007.7 1012.3 1017.4 1019.9 1020.0 1019.9 1016.4 MAX. QNH PRESSURE IN HPA 1027.5 1029.5 1029.2 1021.9 1022.1 1017.7 1017.0 1019.6 1022.9 1028.6 1030.4 1029.1 1030.4 DAY-HOUR 11- 6 15- 9 10- 6 2- 6 29- 6 6- 6 22- 9 23- 6 29- 6 24- 6 27- 6 13- 6 MIN. QNH PRESSURE IN HPA 1011.5 1008.1 1011.3 1004.2 1009.3 1003.8 1002.3 1003.8 1011.4 1010.9 1010.2 1011.5 1002.3 DAY-HOUR 8- 0 7- 0 4-12 24-12 4-15 22-15 2-15 17-15 16-15 5-12 17-21 23-12 MEAN QFF PRESSURE IN HPA 1023.5 1021.5 1015.1 1009.1 1007.7 998.7 995.5 1000.9 1007.9 1014.9 1018.1 1020.6 1011.1 MAX. QFF PRESSURE IN HPA 1033.5 1028.7 1026.6 1020.0 1014.4 1008.4 1004.5 1008.0 1014.2 1028.2 1030.1 1033.2 1033.5 DAY-HOUR 11- 6 15- 3 10- 6 2- 6 29- 9 1- 3 22- 9 23- 6 22- 6 24- 6 27- 6 25- 6 MIN. QFF PRESSURE IN HPA 1014.3 1008.9 1005.5 996.5 1001.0 990.8 989.7 991.8 1001.5 1002.3 1007.3 1011.4 989.7 DAY-HOUR 7-12 25- 0 30- 3 24-12 16-21 30-15 27-15 17-15 16-12 5-12 12- 0 23-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 881.5 883.3 881.3 877.2 878.2 873.4 871.3 875.7 880.0 882.2 882.3 882.2 879.0 MAX. QFE PRESSURE IN HPA 887.7 888.7 889.6 882.6 882.1 879.5 875.2 880.6 883.8 888.7 889.5 888.6 889.6 DAY 5 15 10 2 29 6 22 23 29 24 27 13 MIN. QFE PRESSURE IN HPA 874.9 871.8 875.2 871.1 874.8 868.8 867.6 869.5 876.0 875.8 873.8 876.3 867.6 DAY 8 7 30 25 17 23 28 18 16 5 18 23 MEAN QNH PRESSURE IN HPA 1019.0 1021.0 1018.7 1014.1 1015.2 1009.9 1007.5 1012.4 1017.2 1019.7 1019.8 1019.7 1016.2 MAX. QNH PRESSURE IN HPA 1025.9 1027.1 1028.1 1020.2 1019.6 1016.7 1011.9 1017.9 1021.5 1027.1 1028.0 1026.9 1028.1 DAY 5 15 10 2 29 6 22 23 29 24 27 13 MIN. QNH PRESSURE IN HPA 1011.5 1008.1 1011.9 1007.3 1011.4 1004.7 1003.3 1005.5 1012.8 1012.6 1010.3 1013.1 1003.3 DAY 8 7 30 25 17 23 28 18 16 5 18 23 MEAN QFF PRESSURE IN HPA 1023.2 1020.8 1014.6 1008.7 1007.4 998.6 995.1 1000.7 1007.4 1014.2 1017.4 1020.0 1010.7 MAX. QFF PRESSURE IN HPA 1030.9 1027.6 1024.3 1017.6 1011.7 1006.8 999.2 1006.5 1011.5 1025.7 1026.5 1027.5 1030.9 DAY 11 3 10 2 30 6 31 31 29 24 27 13 MIN. QFF PRESSURE IN HPA 1014.9 1008.9 1005.7 1000.4 1001.9 993.2 989.8 993.3 1002.4 1003.5 1007.3 1013.0 989.8 DAY 8 25 30 24 17 21 28 17 12 5 12 6 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 881.4 883.5 881.8 877.7 878.9 874.4 872.1 876.5 880.6 882.7 882.6 882.2 879.5 MAX. QFE PRESSURE IN HPA 887.5 889.1 889.6 883.4 882.9 879.7 875.6 881.3 884.5 889.1 890.8 889.3 890.8 DAY 5 16 10 2 29 6 13 23 29 24 27 13 MIN. QFE PRESSURE IN HPA 875.2 872.0 874.7 871.3 875.6 869.7 868.3 870.2 876.7 876.5 873.9 875.7 868.3 DAY 8 7 30 25 19 22 28 17 12 5 18 23 MEAN QNH PRESSURE IN HPA 1018.8 1021.2 1019.3 1014.7 1016.1 1011.0 1008.4 1013.3 1018.0 1020.3 1020.2 1019.7 1016.7 MAX. QNH PRESSURE IN HPA 1025.7 1027.5 1028.1 1021.1 1020.5 1016.9 1012.3 1018.7 1022.3 1027.5 1029.4 1027.7 1029.4 DAY 5 16 10 2 29 6 13 23 29 24 27 13 MIN. QNH PRESSURE IN HPA 1011.9 1008.3 1011.3 1007.5 1012.3 1005.7 1004.1 1006.3 1013.6 1013.3 1010.4 1012.4 1004.1 DAY 8 7 30 25 19 22 28 17 12 5 18 23 MEAN QFF PRESSURE IN HPA 1023.7 1022.2 1016.0 1010.1 1008.8 999.8 996.3 1002.2 1009.1 1015.8 1018.9 1020.8 1012.0 MAX. QFF PRESSURE IN HPA 1031.9 1028.7 1025.4 1019.5 1012.5 1008.4 1000.2 1007.6 1013.6 1027.3 1029.5 1028.8 1031.9 DAY 11 15 10 2 29 1 18 23 29 24 27 25 MIN. QFF PRESSURE IN HPA 1016.4 1009.6 1005.5 1000.3 1003.4 994.2 991.4 994.1 1003.7 1005.5 1007.6 1012.7 991.4 DAY 8 7 30 24 16 30 28 17 12 5 12 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 882.5 884.6 883.0 878.5 879.6 875.0 873.0 877.2 881.6 883.6 883.7 883.2 880.5 MAX. QFE PRESSURE IN HPA 889.1 890.4 890.6 884.1 884.3 880.4 876.5 882.1 885.0 890.1 891.7 890.5 891.7 DAY 11 15 10 2 29 6 13 23 29 24 27 13 MIN. QFE PRESSURE IN HPA 876.8 873.1 876.1 870.7 875.9 870.1 869.1 870.5 877.8 876.9 875.6 876.5 869.1 DAY 8 7 30 24 25 22 2 17 16 5 18 23 MEAN QNH PRESSURE IN HPA 1020.1 1022.4 1020.7 1015.6 1016.9 1011.6 1009.4 1014.1 1019.1 1021.4 1021.5 1020.9 1017.8 MAX. QNH PRESSURE IN HPA 1027.5 1029.0 1029.2 1021.9 1022.1 1017.7 1013.3 1019.6 1022.9 1028.6 1030.4 1029.1 1030.4 DAY 11 15 10 2 29 6 13 23 29 24 27 13 MIN. QNH PRESSURE IN HPA 1013.7 1009.5 1012.9 1006.8 1012.7 1006.1 1005.0 1006.6 1014.8 1013.8 1012.3 1013.3 1005.0 DAY 8 7 30 24 25 22 2 17 16 5 18 23 MEAN QFF PRESSURE IN HPA 1024.8 1022.9 1016.9 1010.5 1009.3 1000.3 997.3 1002.8 1009.9 1016.5 1019.8 1021.8 1012.7 MAX. QFF PRESSURE IN HPA 1033.5 1028.7 1026.6 1020.0 1013.9 1007.0 1001.6 1008.0 1014.2 1028.2 1030.1 1033.2 1033.5 DAY 11 15 10 2 29 6 31 23 22 24 27 25 MIN. QFF PRESSURE IN HPA 1017.2 1011.0 1007.7 999.2 1004.7 994.6 992.6 994.2 1004.9 1005.8 1010.0 1014.3 992.6 DAY 20 7 30 24 16 30 28 17 12 5 12 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.8 884.2 882.2 877.7 879.0 874.4 872.5 876.3 880.7 882.7 882.5 882.5 879.7 MAX. QFE PRESSURE IN HPA 888.0 890.9 888.9 883.3 884.0 880.2 879.8 881.4 884.7 889.2 890.6 890.1 890.9 DAY 11 15 9 2 29 4 22 23 30 24 27 13 MIN. QFE PRESSURE IN HPA 876.4 872.2 876.1 868.8 875.2 869.3 869.0 869.8 876.1 875.5 874.5 876.0 868.8 DAY 8 7 4 24 25 22 2 17 16 5 18 22 MEAN QNH PRESSURE IN HPA 1019.3 1022.0 1019.8 1014.7 1016.1 1011.0 1008.8 1013.1 1018.1 1020.4 1020.1 1020.0 1016.9 MAX. QNH PRESSURE IN HPA 1026.3 1029.5 1027.3 1021.0 1021.8 1017.5 1017.0 1018.8 1022.6 1027.6 1029.2 1028.6 1029.5 DAY 11 15 9 2 29 4 22 23 30 24 27 13 MIN. QNH PRESSURE IN HPA 1013.2 1008.5 1012.9 1004.7 1011.9 1005.2 1004.9 1005.8 1012.9 1012.2 1011.1 1012.8 1004.7 DAY 8 7 4 24 25 22 2 17 16 5 18 22 MEAN QFF PRESSURE IN HPA 1023.3 1021.6 1015.4 1009.3 1008.1 999.6 996.4 1001.5 1008.3 1014.9 1017.8 1020.5 1011.4 MAX. QFF PRESSURE IN HPA 1031.0 1028.2 1023.9 1018.5 1014.4 1007.6 1004.5 1006.9 1013.3 1026.8 1028.3 1031.8 1031.8 DAY 11 15 9 2 29 4 22 23 30 24 27 25 MIN. QFF PRESSURE IN HPA 1016.3 1009.8 1008.3 996.7 1004.3 993.5 992.1 992.8 1002.9 1003.4 1008.8 1013.1 992.1 DAY 7 7 4 24 16 22 27 17 16 5 13 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 881.0 883.0 880.7 876.4 877.4 873.0 870.7 874.6 879.2 881.2 881.5 881.5 878.3 MAX. QFE PRESSURE IN HPA 887.0 888.8 887.1 881.2 881.9 878.5 874.0 879.7 883.6 887.0 889.0 888.6 889.0 DAY 5 15 9 2 29 5 13 23 30 19 27 13 MIN. QFE PRESSURE IN HPA 875.0 873.0 874.7 868.4 873.9 868.3 867.8 868.4 875.0 874.3 874.7 874.9 867.8 DAY 7 7 4 24 25 22 2 17 16 5 13 23 MEAN QNH PRESSURE IN HPA 1018.4 1020.6 1018.1 1013.2 1014.3 1009.4 1006.8 1011.2 1016.3 1018.6 1019.0 1018.9 1015.4 MAX. QNH PRESSURE IN HPA 1025.1 1027.2 1025.3 1018.6 1019.4 1015.6 1010.5 1016.9 1021.3 1025.1 1027.4 1026.9 1027.4 DAY 5 15 9 2 29 5 13 23 30 19 27 13 MIN. QNH PRESSURE IN HPA 1011.6 1009.4 1011.3 1004.2 1010.4 1004.1 1003.5 1004.2 1011.6 1010.9 1011.3 1011.5 1003.5 DAY 7 7 4 24 25 22 2 17 16 5 13 23 MEAN QFF PRESSURE IN HPA 1022.6 1020.2 1013.9 1007.8 1006.5 998.0 994.3 999.5 1006.4 1013.2 1016.5 1019.2 1009.8 MAX. QFF PRESSURE IN HPA 1028.8 1026.5 1022.3 1015.8 1012.5 1006.1 998.1 1005.3 1011.7 1023.4 1026.0 1029.6 1029.6 DAY 11 2 9 2 29 5 31 30 30 24 27 25 MIN. QFF PRESSURE IN HPA 1014.3 1009.7 1006.8 996.5 1002.3 991.9 990.3 991.8 1001.5 1002.3 1008.8 1011.4 990.3 DAY 7 7 4 24 16 30 27 17 16 5 13 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 881.3 883.1 880.6 876.5 877.2 872.1 870.0 874.1 878.8 881.7 882.0 882.0 878.3 MAX. QFE PRESSURE IN HPA 887.0 888.3 888.4 882.4 881.0 878.5 873.3 879.6 882.6 888.2 889.1 888.9 889.1 DAY 5 15 9 1 23 5 22 23 30 19 27 18 MIN. QFE PRESSURE IN HPA 875.0 874.0 875.2 870.7 872.9 868.0 866.7 868.0 874.8 874.9 874.7 875.7 866.7 DAY 7 7 4 12 4 22 2 17 16 5 16 23 MEAN QNH PRESSURE IN HPA 1018.8 1020.7 1018.0 1013.3 1014.1 1008.4 1006.0 1010.7 1016.0 1019.1 1019.5 1019.6 1015.4 MAX. QNH PRESSURE IN HPA 1025.1 1026.6 1026.7 1020.0 1018.4 1015.6 1009.7 1016.8 1020.2 1026.5 1027.5 1027.3 1027.5 DAY 5 15 9 1 23 5 22 23 30 19 27 18 MIN. QNH PRESSURE IN HPA 1011.6 1010.5 1011.9 1006.8 1009.3 1003.8 1002.3 1003.8 1011.4 1011.5 1011.3 1012.4 1002.3 DAY 7 7 4 12 4 22 2 17 16 5 16 23 MEAN QFF PRESSURE IN HPA 1023.7 1021.5 1014.6 1008.6 1006.8 997.1 993.9 999.5 1007.0 1014.7 1018.1 1020.6 1010.5 MAX. QFF PRESSURE IN HPA 1030.3 1028.3 1024.7 1018.1 1011.8 1005.8 998.5 1005.5 1011.5 1025.4 1027.8 1030.3 1030.3 DAY 10 2 9 1 23 5 31 23 30 23 27 25 MIN. QFF PRESSURE IN HPA 1015.3 1011.4 1007.8 1001.2 1001.9 990.8 989.7 991.8 1001.8 1003.5 1010.4 1013.5 989.7 DAY 7 24 4 24 16 30 27 17 11 5 12 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 881.8 883.9 881.5 877.3 878.4 873.0 871.0 875.3 879.8 882.5 882.8 882.6 879.1 MAX. QFE PRESSURE IN HPA 887.2 889.1 889.4 883.4 881.7 879.1 875.6 880.2 884.0 888.4 889.5 889.7 889.7 DAY 10 16 9 1 22 5 31 23 30 23 26 18 MIN. QFE PRESSURE IN HPA 875.0 875.4 876.2 870.3 874.7 868.6 867.4 868.8 876.1 876.5 874.9 876.2 867.4 DAY 7 7 3 24 16 22 27 17 15 5 17 23 MEAN QNH PRESSURE IN HPA 1019.3 1021.6 1018.9 1014.3 1015.4 1009.4 1007.2 1011.9 1017.0 1020.1 1020.4 1020.2 1016.3 MAX. QNH PRESSURE IN HPA 1025.4 1027.5 1027.8 1021.1 1019.2 1016.3 1012.3 1017.5 1021.8 1026.7 1028.0 1028.2 1028.2 DAY 10 16 9 1 22 5 31 23 30 23 26 18 MIN. QNH PRESSURE IN HPA 1011.6 1012.1 1013.0 1006.4 1011.3 1004.4 1003.1 1004.7 1012.9 1013.3 1011.5 1013.0 1003.1 DAY 7 7 3 24 16 22 27 17 15 5 17 23 MEAN QFF PRESSURE IN HPA 1024.0 1022.0 1015.1 1009.1 1007.8 998.0 995.2 1000.6 1007.9 1015.3 1018.8 1021.2 1011.2 MAX. QFF PRESSURE IN HPA 1031.4 1028.4 1024.8 1019.4 1011.9 1006.5 1001.7 1006.4 1013.2 1026.6 1027.8 1029.9 1031.4 DAY 10 2 9 1 22 1 31 30 30 23 27 25 MIN. QFF PRESSURE IN HPA 1015.1 1012.1 1007.2 999.9 1002.0 991.0 990.0 992.6 1003.2 1005.7 1010.4 1012.8 990.0 DAY 7 24 3 24 16 30 27 17 12 4 12 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 881.6 883.7 881.5 877.5 878.1 873.2 871.3 875.5 880.0 882.3 882.4 882.4 879.1 MAX. QFE PRESSURE IN HPA 887.6 889.0 889.8 883.4 882.3 879.3 875.6 879.8 884.2 888.4 889.5 889.4 889.8 DAY 10 14 9 1 28 5 31 23 30 23 26 18 MIN. QFE PRESSURE IN HPA 875.0 872.9 875.9 870.6 873.9 868.6 867.5 868.8 876.6 876.9 873.7 876.5 867.5 DAY 7 6 3 24 16 22 2 17 11 4 17 22 MEAN QNH PRESSURE IN HPA 1019.0 1021.4 1018.9 1014.4 1015.1 1009.6 1007.5 1012.2 1017.3 1019.9 1020.0 1020.0 1016.3 MAX. QNH PRESSURE IN HPA 1025.8 1027.4 1028.3 1021.1 1019.9 1016.5 1012.3 1017.0 1022.0 1026.7 1028.0 1027.8 1028.3 DAY 10 14 9 1 28 5 31 23 30 23 26 18 MIN. QNH PRESSURE IN HPA 1011.6 1009.3 1012.7 1006.7 1010.4 1004.4 1003.2 1004.7 1013.5 1013.8 1010.2 1013.3 1003.2 DAY 7 6 3 24 16 22 2 17 11 4 17 22 MEAN QFF PRESSURE IN HPA 1023.1 1020.9 1014.5 1009.0 1007.1 998.1 995.3 1000.6 1007.6 1014.6 1017.8 1020.5 1010.8 MAX. QFF PRESSURE IN HPA 1030.7 1027.2 1024.0 1019.0 1012.2 1007.5 1001.1 1006.7 1013.3 1025.5 1026.7 1028.6 1030.7 DAY 10 2 9 1 29 1 31 30 30 23 26 25 MIN. QFF PRESSURE IN HPA 1014.9 1009.3 1006.4 999.9 1001.0 991.2 990.1 992.0 1003.1 1004.4 1009.2 1012.6 990.1 DAY 7 24 3 24 16 30 27 17 11 4 17 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.9 7.0 11.5 17.5 22.4 26.6 29.7 29.3 26.4 19.6 8.0 7.6 17.5 MINIMUN AIR TEMPERATURE (C) 0.5 3.3 7.0 11.7 16.9 20.5 24.0 23.6 21.0 15.2 4.1 4.4 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 16 27 29 21 0 0 0 98 DAYS WITH MINIMUM TEMP. <=-4 5 0 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 13 4 0 0 0 0 0 0 0 0 0 1 18 TEMPERATURE RECORDS LOWEST(C) -5.0 -1.0 2.0 6.0 7.0 14.0 18.0 20.0 17.0 12.0 1.0 0.0 -5.0 DAY 16 26 1 15 3 3 3 20 26 6 5 25 MAXIMUM AIR TEMPERATURE (C) 9.0 12.4 16.7 22.9 28.0 32.5 35.3 35.2 32.8 25.4 12.9 12.1 22.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 13 25 31 31 26 0 0 0 126 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.0 19.0 24.0 28.0 32.0 39.0 41.0 38.0 36.0 29.0 18.0 16.0 41.0 DAY 2 21 30 10 15 30 1 7 12 1 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 9.1 9.7 11.2 11.1 12.0 11.3 11.6 11.8 10.2 8.8 7.7 10.2 MEAN DAILY TEMP. (MDT) (C) 4.7 7.9 11.8 17.3 22.5 26.5 29.6 29.4 26.9 20.3 8.5 8.3 17.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.5 75.0 166.5 268.0 259.5 176.5 10.5 0.0 0.0 958.5 HEATING DEG. DAYS(BASE 18 0C) 411.0 284.0 193.0 41.5 10.0 0.0 0.0 0.0 0.0 2.0 285.5 301.5 1528.5 DEWPOINT (MEAN C) -2.1 0.6 2.7 5.4 8.4 8.9 11.3 10.5 7.1 6.0 -1.3 1.2 4.9 MIXING RATIO (G/KG) 3.83 4.62 5.43 6.53 8.05 8.42 9.84 9.34 7.42 6.78 4.05 4.94 6.61 VAPOUR PRESSURE (HPA) 5.39 6.49 7.60 9.10 11.18 11.66 13.62 12.94 10.35 9.52 5.71 6.95 9.21 SATURATION DEF. (HPA) 2.88 3.86 6.59 11.59 17.17 24.41 29.35 28.68 24.96 13.77 5.27 3.69 14.35 RELATIVE HUMIDITY (MEAN %) 67 65 57 47 42 34 33 32 30 42 54 67 48 RELATIVE HUMIDITY (MAX. %) 81 79 71 62 56 48 43 42 39 53 68 79 60 RELATIVE HUMIDITY (MIN. %) 50 51 43 33 31 24 26 26 23 32 38 49 36 RELATIVE HUMIDITY (MEAN% 03UTC) 77 74 67 59 52 44 38 36 33 45 65 75 55 RELATIVE HUMIDITY (MEAN% 09UTC) 59 56 51 39 36 29 30 30 28 36 42 54 41 RELATIVE HUMIDITY (MEAN% 15UTC) 66 61 51 39 35 28 30 29 34 46 54 67 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 28.6 23.9 60.4 5.1 2.3 1.2 0.0 0.0 0.0 4.2 12.5 46.2 184.4 DAYS WITH PRECIPITATION >=10 0 0 3 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 3 2 4 0 0 0 0 0 0 0 1 4 14 DAYS WITH PRECIPITATION >= 1 8 6 5 1 1 1 0 0 0 2 2 8 34 DAYS WITH PRECIPITATION 8 9 8 7 4 4 0 0 0 4 5 11 60 GREATEST DAILY PRECIPITATION 9.0 9.0 22.0 4.0 2.0 1.1 0.0 0.0 0.0 3.0 8.0 18.0 22.0 DAY 21 11 15 19 2 20 ** ** ** 31 11 7 DAY WITH THUNDER STORM 0 0 3 1 1 0 0 0 0 3 0 0 8 DAYS WITH SNOW OR SLEET 2 2 1 0 0 0 0 0 0 0 0 0 5 DAYS WITH DUST 0 0 1 4 1 4 0 0 1 2 0 2 15 WIND DIRECTION (PREVAILING) 45 45 45 270 270 225 225 45 180 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 6.2 5.5 5.6 13.4 12.9 6.3 6.1 5.2 5.0 6.4 5.4 6.5 5.8 PREVAILING WIND PERCENT 8.9 11.6 16.5 19.6 15.7 13.8 18.1 14.9 9.6 11.3 7.5 10.1 11.4 CALMS PERCENT OF WIND 74.2 68.8 52.8 37.9 48.0 49.6 49.6 55.2 70.0 67.3 75.0 72.9 60.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 247 2919 VECTOR WIND DIRECTION (MEAN) 270 198 247 258 270 259 216 207 201 223 240 242 249 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.3 0.9 3.6 2.2 1.5 0.9 0.6 0.6 0.2 0.5 0.4 0.9 WIND STEADINESES (MEAN %) 15.8 15.8 25.0 55.4 46.8 36.6 30.0 23.1 35.3 9.1 31.3 19.0 30.0 WIND SPEED (MEAN KNOTS) 1.9 1.9 3.6 6.5 4.7 4.1 3.0 2.6 1.7 2.2 1.6 2.1 3.0 FASTEST WIND DIRECTION 250 270 270 250 250 250 180 50 240 250 220 250 250 FASTEST WIND SPEED (KNOTS) 30 20 25 32 30 30 16 12 15 20 20 25 32 DAY 22 4 13 15 8 2 24 14 25 23 1 16 DAYS WITH SKY CLEAR (0-2)/8 16 12 16 9 18 23 30 30 30 17 19 12 232 DAYS WITH P.CLOUDY (3-6)/8 11 7 9 16 10 7 1 1 0 13 8 10 93 DAYS WITH CLOUDY (7-8)/8 4 9 6 5 3 0 0 0 0 1 3 9 40 DAYS WITH VISIBILITY =< 2 KM 2 0 1 0 0 1 0 0 1 0 0 9 14 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 882.2 881.1 878.6 876.0 876.1 873.9 875.5 875.1 878.6 883.4 884.0 881.6 878.8 MAX. QFE PRESSURE IN HPA 891.1 891.0 886.8 881.0 885.0 883.5 882.8 880.2 885.6 889.8 892.3 893.9 893.9 DAY-HOUR 13- 6 6- 6 20- 6 2- 6 3- 6 8- 6 8- 6 21- 6 28- 6 10- 6 27- 6 24- 6 MIN. QFE PRESSURE IN HPA 871.0 873.0 868.2 867.9 866.4 862.2 866.0 869.7 871.9 875.0 876.9 872.1 862.2 DAY-HOUR 21- 3 22-12 13- 6 25- 9 31-15 29-15 1-15 5-15 1-15 1- 0 12-21 16-12 MEAN QNH PRESSURE IN HPA 1019.7 1018.5 1015.7 1012.8 1012.9 1010.4 1012.2 1011.8 1015.7 1021.0 1021.8 1019.1 1016.0 MAX. QNH PRESSURE IN HPA 1029.8 1029.6 1024.9 1018.4 1022.9 1021.2 1020.4 1017.5 1023.6 1028.3 1031.1 1032.9 1032.9 DAY-HOUR 13- 6 6- 6 20- 6 2- 6 3- 6 8- 6 8- 6 21- 6 28- 6 10- 6 27- 6 24- 6 MIN. QNH PRESSURE IN HPA 1007.2 1009.4 1004.0 1003.7 1002.0 997.2 1001.5 1005.7 1008.2 1011.6 1013.8 1008.4 997.2 DAY-HOUR 21- 3 22-12 13- 6 25- 9 31-15 29-15 1-15 5-15 1-15 1- 0 12-21 16-12 MEAN QFF PRESSURE IN HPA 1021.4 1018.5 1013.3 1007.2 1004.9 1000.4 1000.7 1000.6 1006.0 1014.6 1021.3 1018.7 1010.7 MAX. QFF PRESSURE IN HPA 1034.6 1032.0 1023.8 1015.8 1020.3 1011.5 1011.2 1007.3 1015.9 1022.5 1031.9 1035.6 1035.6 DAY-HOUR 13- 6 6- 6 20- 6 16- 3 3- 6 8- 9 8- 3 21- 6 28- 6 11- 3 26- 3 24- 6 MIN. QFF PRESSURE IN HPA 1006.5 1006.3 1000.2 995.6 993.2 986.4 987.1 993.9 997.4 1002.5 1011.2 1007.1 986.4 DAY-HOUR 21-12 22-12 24-15 25- 9 31-15 29-15 1-15 5-15 12-12 1- 0 1-12 16-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 881.9 880.9 878.4 875.9 876.2 873.9 875.4 875.2 878.6 883.2 883.8 881.5 878.7 MAX. QFE PRESSURE IN HPA 889.7 889.6 885.0 879.6 883.9 880.7 881.7 878.2 883.5 889.5 891.3 890.8 891.3 DAY 13 6 20 16 3 9 8 30 28 11 27 24 MIN. QFE PRESSURE IN HPA 872.6 874.5 869.4 870.6 868.1 866.0 866.9 872.5 873.3 875.0 876.9 873.6 866.0 DAY 21 12 13 25 30 22 2 5 2 1 13 17 MEAN QNH PRESSURE IN HPA 1019.4 1018.3 1015.4 1012.6 1013.0 1010.5 1012.1 1011.8 1015.7 1020.8 1021.6 1019.0 1015.9 MAX. QNH PRESSURE IN HPA 1028.2 1028.1 1022.9 1016.8 1021.7 1018.1 1019.2 1015.3 1021.2 1028.0 1030.0 1029.4 1030.0 DAY 13 6 20 16 3 9 8 30 28 11 27 24 MIN. QNH PRESSURE IN HPA 1008.9 1011.1 1005.3 1006.7 1003.9 1001.5 1002.5 1008.8 1009.7 1011.6 1013.8 1010.1 1001.5 DAY 21 12 13 25 30 22 2 5 2 1 13 17 MEAN QFF PRESSURE IN HPA 1020.6 1017.8 1012.7 1007.1 1005.0 1000.6 1000.6 1000.5 1005.6 1013.9 1020.8 1018.2 1010.3 MAX. QFF PRESSURE IN HPA 1032.9 1029.1 1021.1 1014.4 1018.2 1009.5 1010.3 1004.7 1012.6 1021.5 1030.4 1030.3 1032.9 DAY 13 6 20 16 3 4 8 30 28 11 27 25 MIN. QFF PRESSURE IN HPA 1008.4 1007.8 1001.9 998.0 995.4 991.3 990.0 997.0 999.6 1002.5 1011.7 1008.6 990.0 DAY 21 22 12 25 30 22 2 5 2 1 1 17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 882.1 881.1 878.8 876.6 876.8 874.8 876.4 876.0 879.3 883.7 884.2 881.6 879.3 MAX. QFE PRESSURE IN HPA 890.3 889.7 886.1 880.6 884.4 881.7 882.6 879.1 884.0 889.2 891.6 891.9 891.9 DAY 13 6 20 16 3 8 8 30 28 11 26 24 MIN. QFE PRESSURE IN HPA 871.0 874.7 868.5 872.2 868.8 866.7 867.8 873.0 874.1 876.2 877.4 873.2 866.7 DAY 21 22 13 25 30 22 2 5 2 1 13 16 MEAN QNH PRESSURE IN HPA 1019.6 1018.5 1016.0 1013.5 1013.7 1011.4 1013.2 1012.8 1016.5 1021.4 1022.0 1019.0 1016.5 MAX. QNH PRESSURE IN HPA 1028.9 1028.2 1024.1 1017.9 1022.2 1019.2 1020.2 1016.3 1021.8 1027.6 1030.3 1030.7 1030.7 DAY 13 6 20 16 3 8 8 30 28 11 26 24 MIN. QNH PRESSURE IN HPA 1007.2 1011.3 1004.3 1008.5 1004.7 1002.3 1003.5 1009.4 1010.6 1013.0 1014.4 1009.6 1002.3 DAY 21 22 13 25 30 22 2 5 2 1 13 16 MEAN QFF PRESSURE IN HPA 1021.8 1018.9 1014.0 1008.5 1006.1 1001.8 1001.9 1002.0 1007.5 1015.7 1022.3 1019.2 1011.7 MAX. QFF PRESSURE IN HPA 1034.0 1030.5 1023.3 1015.8 1019.4 1011.0 1011.2 1006.5 1014.5 1022.5 1031.9 1032.3 1034.0 DAY 13 6 20 16 3 4 8 30 28 11 26 24 MIN. QFF PRESSURE IN HPA 1007.2 1008.6 1001.5 1001.5 996.4 993.0 990.6 997.7 1001.2 1005.6 1013.0 1009.5 990.6 DAY 21 22 13 25 30 22 1 5 2 1 1 16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 883.4 882.5 880.0 877.4 877.5 875.2 877.0 876.8 880.2 884.9 885.3 882.7 880.2 MAX. QFE PRESSURE IN HPA 891.1 891.0 886.8 881.0 885.0 883.5 882.8 880.2 885.6 889.8 892.3 893.9 893.9 DAY 13 6 20 2 3 8 8 21 28 10 27 24 MIN. QFE PRESSURE IN HPA 873.7 876.1 868.2 870.6 869.0 866.7 869.0 873.3 874.7 878.8 878.6 873.4 866.7 DAY 21 22 13 25 30 22 1 5 2 1 13 16 MEAN QNH PRESSURE IN HPA 1021.1 1020.1 1017.3 1014.3 1014.5 1011.9 1013.9 1013.7 1017.5 1022.7 1023.2 1020.3 1017.5 MAX. QNH PRESSURE IN HPA 1029.8 1029.6 1024.9 1018.4 1022.9 1021.2 1020.4 1017.5 1023.6 1028.3 1031.1 1032.9 1032.9 DAY 13 6 20 2 3 8 8 21 28 10 27 24 MIN. QNH PRESSURE IN HPA 1010.2 1012.9 1004.0 1006.7 1004.9 1002.3 1004.9 1009.7 1011.3 1015.9 1015.7 1009.8 1002.3 DAY 21 22 13 25 30 22 1 5 2 1 13 16 MEAN QFF PRESSURE IN HPA 1023.2 1020.5 1015.2 1008.8 1006.6 1002.0 1002.6 1002.7 1007.9 1016.5 1022.9 1020.2 1012.4 MAX. QFF PRESSURE IN HPA 1034.6 1032.0 1023.8 1015.6 1020.3 1011.1 1011.0 1007.3 1015.9 1022.3 1031.6 1035.6 1035.6 DAY 13 6 20 16 3 4 8 21 28 11 27 24 MIN. QFF PRESSURE IN HPA 1010.5 1010.1 1001.7 999.2 996.3 992.7 991.7 997.6 1001.2 1008.3 1013.1 1009.4 991.7 DAY 21 22 13 25 30 22 1 5 2 1 1 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 882.4 881.8 879.3 876.4 876.8 874.6 876.3 876.0 879.4 883.8 884.1 881.7 879.4 MAX. QFE PRESSURE IN HPA 890.7 889.9 885.6 880.1 883.0 883.4 881.7 879.7 884.2 889.3 891.3 892.7 892.7 DAY 13 6 20 2 3 8 8 21 28 10 26 24 MIN. QFE PRESSURE IN HPA 871.8 875.2 869.3 867.9 868.5 866.5 868.5 872.4 874.0 878.7 877.2 872.4 866.5 DAY 21 22 13 25 7 21 1 5 2 1 13 16 MEAN QNH PRESSURE IN HPA 1019.9 1019.3 1016.5 1013.2 1013.7 1011.2 1013.1 1012.7 1016.6 1021.5 1021.9 1019.2 1016.6 MAX. QNH PRESSURE IN HPA 1029.3 1028.4 1023.6 1017.4 1020.6 1021.1 1019.2 1016.9 1022.0 1027.7 1030.0 1031.6 1031.6 DAY 13 6 20 2 3 8 8 21 28 10 26 24 MIN. QNH PRESSURE IN HPA 1008.1 1011.9 1005.2 1003.7 1004.3 1002.1 1004.3 1008.7 1010.5 1015.8 1014.1 1008.7 1002.1 DAY 21 22 13 25 7 21 1 5 2 1 13 16 MEAN QFF PRESSURE IN HPA 1021.4 1019.0 1013.9 1007.2 1005.5 1001.1 1001.5 1001.3 1006.4 1014.6 1020.9 1018.5 1010.9 MAX. QFF PRESSURE IN HPA 1033.4 1030.3 1021.6 1013.2 1017.2 1011.5 1009.7 1006.4 1013.7 1020.8 1029.9 1033.3 1033.4 DAY 13 6 20 16 3 8 8 21 28 10 26 24 MIN. QFF PRESSURE IN HPA 1007.4 1008.3 1003.2 995.6 995.5 991.0 990.8 996.3 999.9 1007.3 1012.3 1007.2 990.8 DAY 21 22 13 25 7 21 1 5 2 1 1 16 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 881.2 880.2 877.7 875.2 875.2 873.0 874.6 874.2 877.5 882.3 883.1 880.8 877.9 MAX. QFE PRESSURE IN HPA 889.2 888.0 883.5 878.4 881.2 881.3 880.0 878.1 882.1 888.3 890.3 891.2 891.2 DAY 13 5 19 2 3 8 8 21 28 10 26 24 MIN. QFE PRESSURE IN HPA 871.5 873.0 868.9 868.2 867.3 864.2 866.7 870.9 872.3 877.4 877.2 872.1 864.2 DAY 21 22 13 25 31 21 1 5 1 1 8 16 MEAN QNH PRESSURE IN HPA 1018.7 1017.5 1014.7 1011.9 1011.9 1009.4 1011.2 1010.7 1014.4 1019.9 1020.8 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1027.6 1026.3 1021.2 1015.5 1018.6 1018.7 1017.3 1015.1 1019.6 1026.6 1028.9 1029.9 1029.9 DAY 13 5 19 2 3 8 8 21 28 10 26 24 MIN. QNH PRESSURE IN HPA 1007.7 1009.4 1004.8 1004.0 1003.0 999.5 1002.3 1007.0 1008.6 1014.4 1014.1 1008.4 999.5 DAY 21 22 13 25 31 21 1 5 1 1 8 16 MEAN QFF PRESSURE IN HPA 1019.7 1017.0 1011.8 1006.2 1003.7 999.4 999.6 999.1 1004.1 1012.8 1019.9 1017.4 1009.2 MAX. QFF PRESSURE IN HPA 1031.1 1027.4 1019.1 1011.2 1015.0 1009.2 1007.8 1004.2 1011.1 1019.6 1029.1 1031.4 1031.4 DAY 13 6 20 2 3 8 8 21 28 10 26 24 MIN. QFF PRESSURE IN HPA 1006.5 1006.3 1000.6 996.9 993.9 988.5 988.5 994.7 997.4 1005.4 1011.2 1007.1 988.5 DAY 21 22 24 25 31 21 1 5 12 1 1 16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 881.9 880.5 877.7 874.8 874.7 872.2 873.9 873.5 877.3 882.4 883.5 881.2 877.8 MAX. QFE PRESSURE IN HPA 889.2 888.5 884.0 878.5 880.9 880.3 879.1 877.0 881.8 888.4 890.8 890.8 890.8 DAY 13 5 19 2 2 8 8 21 28 10 26 24 MIN. QFE PRESSURE IN HPA 872.6 874.5 869.6 868.4 866.4 862.2 866.0 869.7 871.9 878.1 877.8 872.9 862.2 DAY 21 11 24 25 31 29 1 5 1 1 8 16 MEAN QNH PRESSURE IN HPA 1019.4 1017.8 1014.7 1011.4 1011.3 1008.5 1010.5 1010.0 1014.2 1019.9 1021.2 1018.6 1014.8 MAX. QNH PRESSURE IN HPA 1027.6 1026.8 1021.8 1015.6 1018.3 1017.6 1016.3 1013.9 1019.3 1026.7 1029.4 1029.4 1029.4 DAY 13 5 19 2 2 8 8 21 28 10 26 24 MIN. QNH PRESSURE IN HPA 1008.9 1011.1 1005.6 1004.2 1002.0 997.2 1001.5 1005.7 1008.2 1015.1 1014.8 1009.3 997.2 DAY 21 11 24 25 31 29 1 5 1 1 8 16 MEAN QFF PRESSURE IN HPA 1021.5 1018.1 1012.6 1006.3 1003.6 998.6 999.0 998.9 1005.0 1014.1 1021.5 1018.7 1009.8 MAX. QFF PRESSURE IN HPA 1032.3 1028.5 1020.2 1012.0 1014.5 1008.1 1007.1 1004.1 1012.0 1021.2 1030.6 1031.9 1032.3 DAY 13 6 19 2 2 4 7 21 28 10 5 24 MIN. QFF PRESSURE IN HPA 1008.7 1009.6 1000.2 998.7 993.2 986.4 987.1 993.9 998.1 1008.0 1012.5 1008.5 986.4 DAY 21 21 24 25 31 29 1 5 1 1 1 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 882.4 881.0 878.5 876.0 875.8 873.5 875.0 874.7 878.3 883.4 884.2 881.8 878.7 MAX. QFE PRESSURE IN HPA 889.3 889.6 884.7 879.7 882.9 881.3 880.1 878.1 882.7 889.4 891.6 891.3 891.6 DAY 13 5 19 30 2 8 7 21 27 10 26 24 MIN. QFE PRESSURE IN HPA 873.9 874.5 870.6 871.5 867.1 866.7 866.7 871.4 872.9 879.2 877.9 873.3 866.7 DAY 21 11 24 25 31 1 1 5 1 20 12 16 MEAN QNH PRESSURE IN HPA 1020.0 1018.5 1015.6 1012.8 1012.6 1010.0 1011.7 1011.3 1015.3 1021.1 1022.0 1019.3 1015.9 MAX. QNH PRESSURE IN HPA 1027.7 1028.1 1022.6 1016.9 1020.5 1018.7 1017.4 1015.1 1020.3 1027.8 1030.3 1030.0 1030.3 DAY 13 5 19 30 2 8 7 21 27 10 26 24 MIN. QNH PRESSURE IN HPA 1010.4 1011.1 1006.7 1007.7 1002.8 1002.3 1002.3 1007.6 1009.3 1016.4 1014.9 1009.7 1002.3 DAY 21 11 24 25 31 1 1 5 1 20 12 16 MEAN QFF PRESSURE IN HPA 1022.1 1018.7 1013.4 1007.2 1004.6 1000.0 1000.3 1000.3 1005.9 1015.0 1021.7 1019.2 1010.7 MAX. QFF PRESSURE IN HPA 1032.5 1029.9 1021.3 1013.0 1017.3 1008.7 1007.9 1005.0 1012.1 1021.7 1031.3 1033.1 1033.1 DAY 13 5 15 2 2 8 7 29 27 10 5 24 MIN. QFF PRESSURE IN HPA 1011.0 1008.5 1001.5 1001.9 993.6 991.5 988.9 995.6 999.4 1009.5 1013.0 1008.4 988.9 DAY 21 21 24 10 31 30 1 5 1 1 1 16 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 882.2 881.1 878.6 876.1 875.9 873.9 875.4 874.9 878.5 883.4 884.1 881.8 878.8 MAX. QFE PRESSURE IN HPA 889.4 889.6 885.1 879.7 883.3 881.4 881.0 878.0 882.7 889.6 892.1 890.7 892.1 DAY 12 5 19 2 2 8 7 29 27 10 5 24 MIN. QFE PRESSURE IN HPA 873.9 874.1 870.4 872.0 867.8 865.6 866.4 872.3 873.3 878.7 876.9 873.6 865.6 DAY 20 11 12 24 31 21 1 5 1 31 12 16 MEAN QNH PRESSURE IN HPA 1019.7 1018.5 1015.6 1012.9 1012.6 1010.4 1012.0 1011.5 1015.6 1021.1 1021.9 1019.3 1015.9 MAX. QNH PRESSURE IN HPA 1027.8 1028.1 1023.0 1016.9 1021.0 1018.8 1018.4 1015.0 1020.3 1028.1 1030.9 1029.3 1030.9 DAY 12 5 19 2 2 8 7 29 27 10 5 24 MIN. QNH PRESSURE IN HPA 1010.4 1010.6 1006.5 1008.3 1003.5 1001.1 1002.0 1008.6 1009.7 1015.8 1013.8 1010.1 1001.1 DAY 20 11 12 24 31 21 1 5 1 31 12 16 MEAN QFF PRESSURE IN HPA 1021.3 1018.2 1012.9 1006.9 1004.4 1000.3 1000.6 1000.2 1005.6 1014.4 1021.0 1018.5 1010.4 MAX. QFF PRESSURE IN HPA 1032.5 1029.2 1020.8 1013.1 1017.2 1008.9 1008.8 1004.5 1011.9 1021.6 1030.8 1031.6 1032.5 DAY 12 5 15 15 2 3 7 29 28 10 5 24 MIN. QFF PRESSURE IN HPA 1009.6 1007.6 1003.1 999.9 994.1 990.7 989.0 996.3 999.8 1009.3 1012.7 1008.2 989.0 DAY 20 21 11 24 31 21 1 5 1 19 12 16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.7 7.9 10.5 20.0 21.7 28.2 33.8 29.5 28.1 22.2 14.0 6.2 18.9 MINIMUN AIR TEMPERATURE (C) 1.5 3.4 5.4 14.3 16.3 21.9 27.1 22.7 21.0 15.9 7.9 2.1 13.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 2 20 31 27 18 0 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 14 4 7 0 0 0 0 0 0 0 0 10 35 TEMPERATURE RECORDS LOWEST(C) -3.0 -3.0 -3.0 6.0 9.0 16.0 25.0 20.0 16.0 9.0 4.0 -2.0 -3.0 DAY 25 19 2 30 1 10 3 5 21 27 26 23 MAXIMUM AIR TEMPERATURE (C) 9.4 13.1 14.3 23.6 25.4 32.2 37.7 33.5 32.2 26.4 18.6 9.9 23.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 5 27 31 31 20 4 0 0 119 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 18.0 22.0 30.0 31.0 37.0 41.0 37.0 37.0 31.0 26.0 17.0 41.0 DAY 4 14 19 5 23 29 9 18 9 2 2 7 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 9.7 8.9 9.3 9.1 10.3 10.6 10.8 11.2 10.5 10.7 7.8 9.7 MEAN DAILY TEMP. (MDT) (C) 5.5 8.3 9.8 18.9 20.8 27.0 32.4 28.1 26.6 21.1 13.3 6.0 18.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 21.0 41.0 181.5 353.0 221.5 168.0 35.0 0.0 0.0 1021.0 HEATING DEG. DAYS(BASE 18 0C) 389.0 263.0 232.5 39.5 13.0 0.0 0.0 0.0 0.0 6.0 146.0 371.5 1460.5 DEWPOINT (MEAN C) -1.1 0.0 -0.3 3.6 6.1 8.3 11.4 10.0 8.4 6.0 0.7 0.1 4.4 MIXING RATIO (G/KG) 4.13 4.48 4.53 5.88 6.91 8.00 9.86 9.09 8.05 6.81 4.88 4.48 6.43 VAPOUR PRESSURE (HPA) 5.82 6.28 6.34 8.23 9.66 11.13 13.65 12.63 11.25 9.56 6.88 6.30 8.98 SATURATION DEF. (HPA) 3.07 4.65 7.20 16.09 17.34 28.09 40.03 29.52 28.25 18.03 9.75 3.53 17.13 RELATIVE HUMIDITY (MEAN %) 69 60 51 36 39 30 26 31 30 37 43 67 43 RELATIVE HUMIDITY (MAX. %) 84 75 67 48 54 43 34 39 38 47 56 81 56 RELATIVE HUMIDITY (MIN. %) 51 43 40 27 29 21 21 24 24 28 33 54 33 RELATIVE HUMIDITY (MEAN% 03UTC) 77 72 64 46 53 41 33 37 36 45 49 78 53 RELATIVE HUMIDITY (MEAN% 09UTC) 56 50 46 34 34 29 24 28 27 32 37 58 38 RELATIVE HUMIDITY (MEAN% 15UTC) 72 58 48 31 34 25 25 29 32 39 50 71 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 71.3 21.0 91.1 13.2 51.2 13.2 0.0 0.0 0.0 1.4 17.0 51.0 330.4 DAYS WITH PRECIPITATION >=10 5 1 3 0 2 0 0 0 0 0 0 1 12 DAYS WITH PRECIPITATION >= 5 5 1 6 2 6 1 0 0 0 0 2 5 28 DAYS WITH PRECIPITATION >= 1 7 4 8 3 9 5 0 0 0 1 3 11 51 DAYS WITH PRECIPITATION 10 4 11 6 12 8 0 0 0 2 4 11 68 GREATEST DAILY PRECIPITATION 19.0 11.0 32.0 5.0 12.0 6.0 0.0 0.0 0.0 1.0 7.0 10.0 32.0 DAY 22 9 27 25 9 1 ** ** ** 26 29 16 DAY WITH THUNDER STORM 0 0 2 0 1 1 0 0 0 1 0 0 5 DAYS WITH SNOW OR SLEET 4 0 2 0 0 0 0 0 0 0 0 1 7 DAYS WITH DUST 3 0 0 2 0 3 0 1 3 4 4 6 26 WIND DIRECTION (PREVAILING) 45 270 225 225 225 225 225 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 5.4 9.7 6.9 9.2 9.7 8.0 7.3 6.9 6.2 9.2 5.4 5.9 7.7 PREVAILING WIND PERCENT 3.2 5.2 13.5 19.3 24.0 20.7 21.3 12.9 15.3 19.4 13.3 12.9 14.3 CALMS PERCENT OF WIND 89.9 85.2 65.2 39.3 39.6 40.7 38.1 63.2 60.0 49.0 70.7 56.8 59.5 NO. OF WIND OBSERVATION 248 135 155 150 154 150 155 155 150 155 150 155 1912 VECTOR WIND DIRECTION (MEAN) 262 283 243 265 232 231 197 217 206 240 253 197 231 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.5 1.4 2.9 3.2 3.0 2.6 1.6 1.1 2.6 0.4 1.1 1.6 WIND STEADINESES (MEAN %) 37.5 41.7 48.3 48.3 52.5 60.0 59.1 57.1 42.3 59.1 23.5 44.0 47.1 WIND SPEED (MEAN KNOTS) 0.8 1.2 2.9 6.0 6.1 5.0 4.4 2.8 2.6 4.4 1.7 2.5 3.4 FASTEST WIND DIRECTION 270 300 270 300 220 280 210 300 230 300 240 240 300 FASTEST WIND SPEED (KNOTS) 25 20 25 25 32 30 18 25 14 60 15 18 60 DAY 7 26 29 26 2 3 22 26 9 13 4 1 DAYS WITH SKY CLEAR (0-2)/8 13 5 10 12 8 20 30 30 24 20 19 15 206 DAYS WITH P.CLOUDY (3-6)/8 7 11 12 7 18 9 1 1 6 8 8 10 98 DAYS WITH CLOUDY (7-8)/8 11 6 9 11 5 1 0 0 0 3 3 6 55 DAYS WITH VISIBILITY =< 2 KM 5 1 2 0 0 1 0 0 0 0 0 5 14 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 882.1 878.1 879.1 879.1 879.7 876.8 874.9 877.3 881.6 882.5 885.5 881.6 879.9 MAX. QFE PRESSURE IN HPA 892.8 884.1 887.9 886.7 887.5 884.7 879.7 884.6 887.5 889.8 892.8 891.0 892.8 DAY-HOUR 18- 6 14- 6 5- 6 27- 6 20- 6 11- 3 21- 6 29- 6 24- 6 9- 6 13- 6 4- 6 MIN. QFE PRESSURE IN HPA 873.4 869.9 866.5 873.0 871.2 869.4 867.7 870.4 875.8 875.9 872.8 871.4 866.5 DAY-HOUR 7-12 11-12 27-12 22-15 16-12 23-15 6-15 14-15 5-15 4-12 30-12 16- 3 MEAN QNH PRESSURE IN HPA 1019.7 1015.1 1016.3 1016.2 1017.0 1013.7 1011.5 1014.3 1019.1 1020.0 1023.5 1019.1 1017.1 MAX. QNH PRESSURE IN HPA 1031.7 1021.9 1026.2 1024.8 1025.7 1022.6 1016.9 1022.4 1025.7 1028.3 1031.7 1029.6 1031.7 DAY-HOUR 18- 6 14- 6 5- 6 27- 6 20- 6 11- 3 21- 6 29- 6 24- 6 9- 6 13- 6 4- 6 MIN. QNH PRESSURE IN HPA 1009.8 1005.9 1002.1 1009.4 1007.4 1005.3 1003.4 1006.5 1012.6 1012.7 1009.2 1007.6 1002.1 DAY-HOUR 7-12 11-12 27-12 22-15 16-12 23-15 6-15 14-15 5-15 4-12 30-12 16- 3 MEAN QFF PRESSURE IN HPA 1020.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 26- 6 **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1008.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 6-12 **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 881.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 891.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 27 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 874.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1019.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 27 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1011.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1020.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 27 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1009.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 882.1 878.3 879.4 879.5 880.3 877.7 875.6 878.1 882.1 882.9 885.8 881.5 880.3 MAX. QFE PRESSURE IN HPA 891.4 881.5 887.5 886.0 886.7 884.7 879.6 883.9 886.4 888.7 891.6 888.7 891.6 DAY 18 2 5 28 20 11 22 29 24 10 11 4 MIN. QFE PRESSURE IN HPA 874.3 872.4 867.5 874.8 873.3 871.9 869.8 872.7 878.2 878.1 873.6 871.4 867.5 DAY 7 11 27 12 17 23 6 14 6 4 29 16 MEAN QNH PRESSURE IN HPA 1019.6 1015.4 1016.5 1016.8 1017.6 1014.7 1012.3 1015.1 1019.7 1020.5 1023.8 1018.9 1017.6 MAX. QNH PRESSURE IN HPA 1030.1 1019.0 1025.7 1024.0 1024.8 1022.6 1016.8 1021.7 1024.5 1027.1 1030.3 1027.1 1030.3 DAY 18 2 5 28 20 11 22 29 24 10 11 4 MIN. QNH PRESSURE IN HPA 1010.9 1008.7 1003.2 1011.4 1009.7 1008.2 1005.8 1009.1 1015.3 1015.1 1010.1 1007.6 1003.2 DAY 7 11 27 12 17 23 6 14 6 4 29 16 MEAN QFF PRESSURE IN HPA 1021.4 1015.7 1015.7 1011.1 1011.0 1005.0 1000.0 1004.9 1010.7 1014.3 1021.9 1020.4 1012.7 MAX. QFF PRESSURE IN HPA 1034.0 1020.5 1029.9 1021.4 1018.7 1013.6 1005.0 1013.0 1017.7 1020.9 1029.1 1029.8 1034.0 DAY 27 24 5 28 11 11 22 29 24 10 19 23 MIN. QFF PRESSURE IN HPA 1010.1 1007.8 1000.0 1004.9 1001.9 997.7 994.1 998.5 1005.9 1007.3 1009.2 1008.7 994.1 DAY 7 11 27 13 17 24 7 14 6 4 29 16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 883.1 879.6 880.2 880.4 880.9 878.1 876.3 878.8 883.0 883.8 886.8 882.8 881.2 MAX. QFE PRESSURE IN HPA 892.8 884.1 887.9 886.7 887.5 884.7 879.7 884.6 887.5 889.8 892.8 891.0 892.8 DAY 18 14 5 27 20 11 21 29 24 9 13 4 MIN. QFE PRESSURE IN HPA 874.8 872.4 868.1 875.7 873.8 872.2 870.1 873.2 878.8 878.5 874.5 873.6 868.1 DAY 7 11 27 12 17 23 6 14 6 4 30 16 MEAN QNH PRESSURE IN HPA 1020.8 1016.9 1017.5 1017.7 1018.3 1015.2 1013.1 1016.0 1020.7 1021.5 1024.9 1020.4 1018.6 MAX. QNH PRESSURE IN HPA 1031.7 1021.9 1026.2 1024.8 1025.7 1022.6 1016.9 1022.4 1025.7 1028.3 1031.7 1029.6 1031.7 DAY 18 14 5 27 20 11 21 29 24 9 13 4 MIN. QNH PRESSURE IN HPA 1011.4 1008.7 1003.9 1012.4 1010.3 1008.5 1006.1 1009.6 1015.9 1015.6 1011.1 1010.1 1003.9 DAY 7 11 27 12 17 23 6 14 6 4 30 16 MEAN QFF PRESSURE IN HPA 1022.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 26 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1010.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 882.3 878.8 879.6 879.6 880.2 877.4 875.5 877.8 882.2 882.7 885.6 881.8 880.3 MAX. QFE PRESSURE IN HPA 892.4 882.4 887.3 886.0 886.1 883.6 879.2 883.6 885.9 889.1 891.9 889.2 892.4 DAY 18 14 4 27 20 11 21 29 23 9 13 4 MIN. QFE PRESSURE IN HPA 874.1 871.8 870.1 874.9 874.0 871.9 869.5 872.5 878.3 877.3 874.0 874.4 869.5 DAY 7 11 27 12 17 23 6 14 5 4 29 1 MEAN QNH PRESSURE IN HPA 1019.9 1015.9 1016.9 1016.8 1017.5 1014.4 1012.3 1014.8 1019.8 1020.3 1023.6 1019.3 1017.6 MAX. QNH PRESSURE IN HPA 1031.2 1020.0 1025.5 1024.0 1024.1 1021.3 1016.4 1021.3 1023.9 1027.5 1030.7 1027.6 1031.2 DAY 18 14 4 27 20 11 21 29 23 9 13 4 MIN. QNH PRESSURE IN HPA 1010.6 1008.1 1006.1 1011.5 1010.5 1008.2 1005.5 1008.8 1015.4 1014.2 1010.5 1011.0 1005.5 DAY 7 11 27 12 17 23 6 14 5 4 29 1 MEAN QFF PRESSURE IN HPA 1020.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 26 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1009.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 881.3 877.2 878.1 878.0 878.7 875.8 873.9 876.2 880.5 881.5 884.6 880.9 878.9 MAX. QFE PRESSURE IN HPA 891.7 881.1 885.6 884.2 884.3 881.8 877.3 882.1 884.0 888.3 890.4 888.1 891.7 DAY 18 1 2 27 19 5 10 29 23 9 13 22 MIN. QFE PRESSURE IN HPA 873.4 869.9 866.5 873.1 871.2 870.2 868.3 871.0 876.5 875.9 872.8 874.0 866.5 DAY 7 11 27 12 16 23 6 14 5 4 30 1 MEAN QNH PRESSURE IN HPA 1018.7 1014.1 1015.2 1015.0 1015.8 1012.5 1010.4 1013.0 1017.9 1018.9 1022.4 1018.3 1016.0 MAX. QNH PRESSURE IN HPA 1030.4 1018.5 1023.6 1022.0 1022.1 1019.3 1014.2 1019.6 1021.8 1026.6 1029.0 1026.4 1030.4 DAY 18 1 2 27 19 5 10 29 23 9 13 22 MIN. QNH PRESSURE IN HPA 1009.8 1005.9 1002.1 1009.5 1007.4 1006.3 1004.1 1007.2 1013.3 1012.7 1009.2 1010.5 1002.1 DAY 7 11 27 12 16 23 6 14 5 4 30 1 MEAN QFF PRESSURE IN HPA 1019.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 26 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1008.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 881.8 877.2 878.2 877.8 878.6 875.2 873.3 875.8 880.2 881.6 885.0 881.3 878.8 MAX. QFE PRESSURE IN HPA 891.8 881.8 885.9 883.8 883.7 881.9 876.5 881.7 884.1 888.0 891.6 888.1 891.8 DAY 18 1 5 24 10 5 10 29 23 9 13 22 MIN. QFE PRESSURE IN HPA 874.0 870.0 868.1 873.0 871.2 869.4 867.7 870.4 875.8 875.9 872.9 874.6 867.7 DAY 6 11 27 22 16 23 6 14 5 4 30 1 MEAN QNH PRESSURE IN HPA 1019.3 1014.1 1015.3 1014.8 1015.7 1011.9 1009.7 1012.5 1017.5 1019.1 1022.9 1018.8 1016.0 MAX. QNH PRESSURE IN HPA 1030.5 1019.3 1023.9 1021.5 1021.4 1019.4 1013.3 1019.2 1021.9 1026.3 1030.3 1026.4 1030.5 DAY 18 1 5 24 10 5 10 29 23 9 13 22 MIN. QNH PRESSURE IN HPA 1010.5 1006.0 1003.9 1009.4 1007.4 1005.3 1003.4 1006.5 1012.6 1012.7 1009.3 1011.2 1003.4 DAY 6 11 27 22 16 23 6 14 5 4 30 1 MEAN QFF PRESSURE IN HPA 1021.0 1014.0 1014.3 1009.1 1009.0 1002.2 997.2 1002.2 1008.3 1012.8 1020.9 1020.2 1010.9 MAX. QFF PRESSURE IN HPA 1033.8 1020.3 1027.4 1019.0 1017.4 1011.4 1000.7 1010.4 1014.5 1020.2 1028.4 1029.9 1033.8 DAY 26 1 5 28 10 5 22 29 23 9 13 22 MIN. QFF PRESSURE IN HPA 1009.2 1004.6 1001.3 1002.7 998.8 995.9 991.6 995.2 1002.8 1004.5 1008.1 1011.0 991.6 DAY 6 11 27 22 16 23 6 14 5 4 2 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 882.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 891.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 18 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 875.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1020.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1030.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 18 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1011.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1021.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 26 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1010.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 882.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 891.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 26 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 874.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1019.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1030.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 26 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1011.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1020.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 26 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1009.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.9 4.2 11.7 19.8 24.8 30.0 33.2 32.0 27.5 19.2 13.8 8.7 19.0 MINIMUN AIR TEMPERATURE (C) -1.4 -0.1 5.7 13.4 17.6 22.4 25.4 24.4 19.3 12.0 8.1 3.0 12.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 11 21 31 28 10 1 0 0 102 DAYS WITH MINIMUM TEMP. <=-4 8 4 0 0 0 0 0 0 0 0 0 0 12 DAYS WITH FREEZING MIN.<= 0 21 17 2 0 0 0 0 0 0 0 0 4 44 TEMPERATURE RECORDS LOWEST(C) -7.0 -5.0 0.0 5.0 10.0 18.0 22.0 19.0 10.0 6.0 4.0 -1.0 -7.0 DAY 25 1 5 18 16 1 5 30 23 30 26 20 MAXIMUM AIR TEMPERATURE (C) 6.8 7.7 16.0 24.0 28.5 34.0 37.3 36.6 32.3 24.1 17.9 13.0 23.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 14 29 31 31 25 5 0 0 136 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 11.0 13.0 22.0 30.0 34.0 38.0 40.0 39.0 37.0 32.0 25.0 19.0 40.0 DAY 5 16 24 22 22 21 20 1 4 3 13 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 7.8 10.3 10.6 10.9 11.6 11.9 12.2 13.0 12.1 9.8 10.0 10.7 MEAN DAILY TEMP. (MDT) (C) 2.7 3.8 10.9 18.7 23.1 28.2 31.3 30.5 25.8 18.1 13.0 8.0 17.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 12.5 86.5 215.5 319.5 294.5 148.5 24.5 0.0 0.0 1101.5 HEATING DEG. DAYS(BASE 18 0C) 473.5 412.0 221.5 28.5 2.0 0.0 0.0 0.0 0.5 51.0 150.0 310.0 1649.0 DEWPOINT (MEAN C) -3.0 -1.1 0.6 2.6 6.9 10.6 12.0 13.0 8.0 5.2 3.7 -1.2 4.8 MIXING RATIO (G/KG) 3.57 4.13 4.75 5.58 7.28 9.34 10.27 10.99 7.94 6.52 5.81 4.08 6.69 VAPOUR PRESSURE (HPA) 5.02 5.80 6.66 7.79 10.15 12.95 14.21 15.20 11.07 9.13 8.16 5.75 9.33 SATURATION DEF. (HPA) 2.69 2.66 7.75 16.16 22.28 30.57 37.63 33.48 26.90 14.25 8.02 5.94 17.36 RELATIVE HUMIDITY (MEAN %) 67 70 49 35 34 32 28 33 31 43 53 52 44 RELATIVE HUMIDITY (MAX. %) 82 84 70 49 46 42 35 43 39 56 69 65 57 RELATIVE HUMIDITY (MIN. %) 53 59 35 25 25 24 23 25 24 31 40 40 34 RELATIVE HUMIDITY (MEAN% 03UTC) 79 78 66 48 45 41 34 41 35 53 63 62 54 RELATIVE HUMIDITY (MEAN% 09UTC) 58 66 44 30 30 29 26 30 27 39 45 44 39 RELATIVE HUMIDITY (MEAN% 15UTC) 74 75 45 32 28 27 26 31 32 43 56 57 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 54.6 77.9 44.0 32.0 2.0 0.0 0.0 0.0 0.0 9.1 31.4 19.2 270.2 DAYS WITH PRECIPITATION >=10 2 4 0 1 0 0 0 0 0 0 1 1 9 DAYS WITH PRECIPITATION >= 5 3 8 4 2 0 0 0 0 0 1 2 1 21 DAYS WITH PRECIPITATION >= 1 10 10 10 7 2 0 0 0 0 2 6 3 50 DAYS WITH PRECIPITATION 11 12 14 11 2 0 1 0 0 4 9 4 68 GREATEST DAILY PRECIPITATION 14.0 14.0 9.0 16.0 1.0 0.0 0.0 0.0 0.0 6.0 18.0 14.0 18.0 DAY 23 25 19 30 1 ** ** ** ** 25 18 18 DAY WITH THUNDER STORM 0 0 3 3 0 0 0 0 0 1 0 0 7 DAYS WITH SNOW OR SLEET 5 4 0 0 0 0 0 0 0 0 0 1 10 DAYS WITH DUST 5 6 2 7 5 8 8 6 5 4 7 4 67 WIND DIRECTION (PREVAILING) 225 225 270 225 225 225 225 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 6.4 5.4 13.5 10.5 8.4 6.9 6.7 6.7 6.8 7.5 7.5 5.4 7.5 PREVAILING WIND PERCENT 9.0 7.6 21.3 19.3 25.2 24.7 14.2 18.1 18.7 8.4 6.7 10.3 14.8 CALMS PERCENT OF WIND 71.0 79.3 34.8 30.0 38.7 53.3 66.5 57.4 60.7 73.5 76.0 74.2 59.6 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 238 230 255 246 235 232 209 199 218 257 259 225 235 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.7 3.1 2.7 3.1 1.8 0.9 1.8 2.0 0.9 0.7 0.5 1.5 WIND STEADINESES (MEAN %) 35.0 46.7 46.3 40.9 63.3 56.2 39.1 64.3 74.1 42.9 36.8 31.3 46.9 WIND SPEED (MEAN KNOTS) 2.0 1.5 6.7 6.6 4.9 3.2 2.3 2.8 2.7 2.1 1.9 1.6 3.2 FASTEST WIND DIRECTION 250 250 260 210 260 20 350 220 250 240 260 250 210 FASTEST WIND SPEED (KNOTS) 16 20 22 30 22 20 15 14 18 16 25 15 30 DAY 7 18 14 14 10 28 21 16 29 14 17 12 DAYS WITH SKY CLEAR (0-2)/8 13 8 10 12 19 24 28 28 28 20 13 13 216 DAYS WITH P.CLOUDY (3-6)/8 10 11 15 12 8 6 3 3 2 8 12 11 101 DAYS WITH CLOUDY (7-8)/8 8 10 6 6 4 0 0 0 0 3 5 7 49 DAYS WITH VISIBILITY =< 2 KM 6 7 1 0 0 0 0 0 1 0 0 2 17 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 880.5 880.2 878.5 877.7 877.8 875.6 875.5 875.5 879.0 881.3 883.2 881.9 878.9 MAX. QFE PRESSURE IN HPA 887.9 888.1 887.7 885.5 883.1 883.6 881.5 883.8 886.5 886.8 890.7 888.6 890.7 DAY-HOUR 10-12 1- 6 24- 3 20- 6 16- 6 2- 6 18- 6 30- 6 26- 6 23- 6 5- 6 17- 6 MIN. QFE PRESSURE IN HPA 872.1 871.6 865.7 870.0 872.5 867.3 870.1 870.5 873.1 875.9 876.5 867.8 865.7 DAY-HOUR 6-15 12- 3 2-12 15-15 9-15 16-15 31-15 6-15 21-12 4-15 15-12 11-15 MEAN QNH PRESSURE IN HPA 1017.9 1017.5 1015.6 1014.7 1014.8 1012.3 1012.2 1012.2 1016.2 1018.8 1020.9 1019.4 1016.0 MAX. QNH PRESSURE IN HPA 1026.2 1026.4 1025.9 1023.5 1020.8 1021.3 1019.0 1021.5 1024.6 1024.9 1029.3 1026.9 1029.3 DAY-HOUR 10-12 1- 6 24- 3 20- 6 16- 6 2- 6 18- 6 30- 6 26- 6 23- 6 5- 6 17- 6 MIN. QNH PRESSURE IN HPA 1008.4 1007.8 1001.2 1006.0 1008.8 1003.0 1006.1 1006.6 1009.5 1012.7 1013.3 1003.5 1001.2 DAY-HOUR 6-15 12- 3 2-12 15-15 9-15 16-15 31-15 6-15 21-12 4-15 15-12 11-15 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 880.2 879.9 878.8 878.0 878.4 876.1 876.2 876.2 879.5 881.8 883.4 882.0 879.2 MAX. QFE PRESSURE IN HPA 886.3 887.4 887.7 885.1 881.6 883.1 880.6 882.8 885.3 885.6 890.2 887.6 890.2 DAY 10 1 24 21 16 2 18 31 26 23 3 27 MIN. QFE PRESSURE IN HPA 874.2 871.6 866.5 870.7 875.2 869.4 872.9 872.8 874.8 877.5 877.5 873.6 866.5 DAY 30 12 19 16 10 17 3 1 21 5 25 12 MEAN QNH PRESSURE IN HPA 1017.6 1017.2 1015.9 1015.0 1015.4 1012.9 1013.0 1013.0 1016.7 1019.3 1021.1 1019.6 1016.4 MAX. QNH PRESSURE IN HPA 1024.4 1025.6 1025.9 1023.0 1019.1 1020.8 1017.9 1020.4 1023.2 1023.6 1028.7 1025.8 1028.7 DAY 10 1 24 21 16 2 18 31 26 23 3 27 MIN. QNH PRESSURE IN HPA 1010.7 1007.8 1002.1 1006.8 1011.9 1005.3 1009.3 1009.2 1011.4 1014.5 1014.5 1010.1 1002.1 DAY 30 12 19 16 10 17 3 1 21 5 25 12 MEAN QFF PRESSURE IN HPA 1020.8 1019.7 1014.6 1009.6 1007.6 1002.3 1001.1 1001.6 1008.1 1014.5 1018.9 1020.0 1011.6 MAX. QFF PRESSURE IN HPA 1028.3 1031.2 1022.9 1018.7 1013.0 1011.9 1006.4 1011.0 1016.4 1021.5 1026.1 1028.3 1031.2 DAY 10 1 24 20 17 2 12 31 26 31 3 20 MIN. QFF PRESSURE IN HPA 1012.3 1009.5 999.7 1001.5 1002.2 994.3 997.2 996.8 1003.0 1007.0 1011.9 1009.8 994.3 DAY 30 18 19 16 24 17 31 1 14 5 16 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 881.4 881.2 879.6 878.9 879.2 876.8 876.8 876.9 880.5 882.7 884.4 883.2 880.1 MAX. QFE PRESSURE IN HPA 886.7 888.1 886.3 885.5 883.1 883.6 881.5 883.8 886.5 886.8 890.7 888.6 890.7 DAY 10 1 28 20 16 2 18 30 26 23 5 17 MIN. QFE PRESSURE IN HPA 875.9 871.8 868.2 873.2 875.8 870.1 873.3 873.6 875.7 879.3 878.5 874.4 868.2 DAY 24 25 19 16 10 17 31 20 21 4 25 12 MEAN QNH PRESSURE IN HPA 1018.9 1018.6 1016.9 1016.1 1016.3 1013.7 1013.7 1013.8 1017.9 1020.3 1022.2 1020.9 1017.4 MAX. QNH PRESSURE IN HPA 1024.8 1026.4 1024.4 1023.5 1020.8 1021.3 1019.0 1021.5 1024.6 1024.9 1029.3 1026.9 1029.3 DAY 10 1 28 20 16 2 18 30 26 23 5 17 MIN. QNH PRESSURE IN HPA 1012.7 1008.1 1004.0 1009.6 1012.6 1006.1 1009.7 1010.1 1012.4 1016.5 1015.6 1011.0 1004.0 DAY 24 25 19 16 10 17 31 20 21 4 25 12 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 880.9 880.7 878.9 878.3 878.3 876.4 876.1 876.1 879.6 881.7 883.3 881.9 879.4 MAX. QFE PRESSURE IN HPA 886.4 887.3 884.6 884.9 881.8 882.8 880.7 883.5 885.2 886.3 889.9 888.5 889.9 DAY 9 1 28 20 16 2 18 30 26 23 3 20 MIN. QFE PRESSURE IN HPA 874.6 872.6 867.2 872.9 875.5 869.8 872.9 872.7 873.9 877.8 877.8 871.4 867.2 DAY 6 25 2 14 23 17 3 20 20 4 15 11 MEAN QNH PRESSURE IN HPA 1018.2 1018.1 1016.1 1015.3 1015.4 1013.2 1012.9 1012.9 1016.9 1019.2 1021.0 1019.4 1016.6 MAX. QNH PRESSURE IN HPA 1024.5 1025.5 1022.4 1022.8 1019.3 1020.4 1018.1 1021.2 1023.1 1024.4 1028.4 1026.8 1028.4 DAY 9 1 28 20 16 2 18 30 26 23 3 20 MIN. QNH PRESSURE IN HPA 1011.2 1008.9 1002.9 1009.3 1012.2 1005.8 1009.3 1009.1 1010.4 1014.8 1014.8 1007.6 1002.9 DAY 6 25 2 14 23 17 3 20 20 4 15 11 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 879.9 879.6 877.7 876.9 876.9 874.6 874.5 874.5 878.0 880.1 882.4 881.0 878.0 MAX. QFE PRESSURE IN HPA 887.9 886.1 882.7 884.1 879.9 880.8 879.0 882.0 883.1 884.5 888.1 887.6 888.1 DAY 10 1 28 20 16 2 18 30 26 30 3 20 MIN. QFE PRESSURE IN HPA 872.6 871.9 865.7 870.8 873.9 868.0 871.3 871.3 873.1 876.3 876.5 870.8 865.7 DAY 6 25 2 26 9 16 31 19 21 4 15 11 MEAN QNH PRESSURE IN HPA 1017.2 1016.8 1014.6 1013.8 1013.8 1011.2 1011.0 1011.1 1015.0 1017.4 1019.9 1018.4 1015.0 MAX. QNH PRESSURE IN HPA 1026.2 1024.1 1020.3 1021.9 1017.2 1018.2 1016.2 1019.5 1020.8 1022.3 1026.4 1025.8 1026.4 DAY 10 1 28 20 16 2 18 30 26 30 3 20 MIN. QNH PRESSURE IN HPA 1008.9 1008.2 1001.2 1006.9 1010.4 1003.8 1007.5 1007.5 1009.5 1013.1 1013.3 1006.9 1001.2 DAY 6 25 2 26 9 16 31 19 21 4 15 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 880.3 879.9 877.7 876.6 876.4 873.9 873.8 873.8 877.6 880.4 882.8 881.4 877.9 MAX. QFE PRESSURE IN HPA 886.5 885.5 883.6 884.0 879.9 880.2 878.5 881.5 882.8 884.6 888.4 887.8 888.4 DAY 9 1 28 20 16 2 11 30 26 30 3 20 MIN. QFE PRESSURE IN HPA 872.1 872.4 866.0 870.0 872.5 867.3 870.1 870.5 873.3 875.9 876.9 867.8 866.0 DAY 6 25 2 15 9 16 31 6 21 4 15 11 MEAN QNH PRESSURE IN HPA 1017.7 1017.1 1014.7 1013.5 1013.2 1010.4 1010.3 1010.3 1014.6 1017.7 1020.5 1018.9 1014.9 MAX. QNH PRESSURE IN HPA 1024.6 1023.5 1021.3 1021.8 1017.2 1017.5 1015.6 1019.0 1020.4 1022.4 1026.7 1026.0 1026.7 DAY 9 1 28 20 16 2 11 30 26 30 3 20 MIN. QNH PRESSURE IN HPA 1008.4 1008.7 1001.5 1006.0 1008.8 1003.0 1006.1 1006.6 1009.7 1012.7 1013.8 1003.5 1001.5 DAY 6 25 2 15 9 16 31 6 21 4 15 11 MEAN QFF PRESSURE IN HPA 1020.8 1019.5 1013.3 1008.1 1005.2 999.6 998.1 998.8 1005.7 1012.8 1018.2 1019.3 1010.0 MAX. QFF PRESSURE IN HPA 1029.3 1028.8 1020.0 1017.4 1011.9 1009.1 1004.2 1009.9 1013.3 1020.4 1025.2 1028.5 1029.3 DAY 9 1 7 20 16 1 11 30 26 30 26 20 MIN. QFF PRESSURE IN HPA 1009.2 1009.5 1001.8 999.8 1000.2 991.1 993.6 993.5 1000.1 1003.8 1009.8 1003.4 991.1 DAY 6 18 2 26 23 16 31 6 13 4 15 11 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 DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.2 7.1 12.5 16.6 21.4 26.1 30.1 29.6 25.4 17.7 12.6 8.7 17.7 MINIMUN AIR TEMPERATURE (C) 0.7 2.4 7.4 10.7 15.3 20.2 24.1 23.8 19.4 12.6 7.1 4.6 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 15 27 31 13 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 9 5 3 1 0 0 0 0 0 0 1 1 20 TEMPERATURE RECORDS LOWEST(C) -3.0 -1.0 -1.0 -2.0 8.0 15.0 19.0 21.0 13.0 9.0 0.0 0.0 -3.0 DAY 2 1 4 2 3 6 21 3 24 31 24 31 MAXIMUM AIR TEMPERATURE (C) 10.3 12.1 17.9 22.6 26.9 31.6 35.7 35.4 32.1 24.4 19.3 14.5 23.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 8 22 31 31 25 0 0 0 118 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 14.0 17.0 24.0 30.0 35.0 37.0 41.0 38.0 37.0 29.0 25.0 19.0 41.0 DAY 7 18 24 25 27 30 18 8 14 4 2 16 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 9.7 10.5 11.9 11.6 11.4 11.6 11.6 12.7 11.8 12.2 9.9 11.2 MEAN DAILY TEMP. (MDT) (C) 5.5 7.2 12.6 16.6 21.1 25.9 29.9 29.6 25.7 18.5 13.2 9.5 18.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 11.0 45.5 146.5 275.5 267.5 147.5 2.5 0.0 0.0 896.0 HEATING DEG. DAYS(BASE 18 0C) 386.5 301.5 167.5 75.0 15.0 0.0 0.0 0.0 0.0 17.5 143.5 262.0 1368.5 DEWPOINT (MEAN C) -2.6 -1.8 0.8 3.0 5.1 9.5 12.7 12.4 6.7 6.5 0.1 -1.5 4.2 MIXING RATIO (G/KG) 3.68 3.97 4.81 5.66 6.49 8.74 10.80 10.57 7.37 6.97 4.57 4.00 6.47 VAPOUR PRESSURE (HPA) 5.18 5.57 6.71 7.89 9.06 12.13 14.91 14.61 10.30 9.80 6.42 5.62 9.02 SATURATION DEF. (HPA) 3.92 4.81 8.37 12.12 17.53 22.47 28.88 27.81 23.23 11.05 8.75 5.94 14.57 RELATIVE HUMIDITY (MEAN %) 60 56 48 44 37 37 36 35 32 49 44 51 44 RELATIVE HUMIDITY (MAX. %) 75 76 67 62 53 50 46 45 42 62 56 65 58 RELATIVE HUMIDITY (MIN. %) 44 40 32 29 24 27 27 28 23 37 32 37 32 RELATIVE HUMIDITY (MEAN% 03UTC) 67 64 59 54 48 46 42 39 35 57 47 55 51 RELATIVE HUMIDITY (MEAN% 09UTC) 49 48 39 36 30 33 33 33 28 40 37 45 38 RELATIVE HUMIDITY (MEAN% 15UTC) 62 51 42 36 30 29 31 32 33 51 46 51 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.9 22.5 30.7 49.0 23.2 8.4 6.0 0.0 0.0 7.2 11.1 23.2 220.2 DAYS WITH PRECIPITATION >=10 1 0 0 1 1 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 4 2 3 4 1 1 1 0 0 0 1 1 18 DAYS WITH PRECIPITATION >= 1 8 5 7 7 3 3 1 0 0 3 2 4 43 DAYS WITH PRECIPITATION 9 10 13 9 5 9 2 0 0 6 6 6 75 GREATEST DAILY PRECIPITATION 10.0 8.0 7.6 27.0 15.0 5.0 6.0 0.0 0.0 4.0 7.0 16.2 27.0 DAY 25 20 3 1 6 26 21 ** ** 8 30 26 DAY WITH THUNDER STORM 2 0 6 5 6 11 2 0 0 0 2 0 34 DAYS WITH SNOW OR SLEET 2 2 1 1 0 0 0 0 0 0 0 1 7 DAYS WITH DUST 1 2 5 3 4 2 0 0 2 3 2 3 27 WIND DIRECTION (PREVAILING) 45 45 45 270 270 225 45 225 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 5.6 6.4 7.1 9.6 12.0 8.3 6.4 6.4 6.6 6.8 6.3 5.6 6.6 PREVAILING WIND PERCENT 11.4 14.4 13.8 16.3 19.0 16.3 13.7 14.5 15.0 14.5 13.8 12.1 13.4 CALMS PERCENT OF WIND 71.6 57.9 51.4 40.8 37.1 35.8 47.2 57.3 56.3 65.7 70.4 71.8 55.1 NO. OF WIND OBSERVATION 211 216 247 240 248 240 248 248 240 248 240 248 2874 VECTOR WIND DIRECTION (MEAN) 34 270 299 272 261 240 195 199 233 45 351 271 260 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.5 1.4 1.9 2.8 1.0 1.1 0.8 0.5 0.3 0.5 0.3 0.7 WIND STEADINESES (MEAN %) 16.7 15.6 32.6 37.3 49.1 17.2 30.6 30.8 16.1 13.6 23.8 14.3 20.0 WIND SPEED (MEAN KNOTS) 1.8 3.2 4.3 5.1 5.7 5.8 3.6 2.6 3.1 2.2 2.1 2.1 3.5 FASTEST WIND DIRECTION 270 260 270 300 270 20 140 220 270 90 270 280 270 FASTEST WIND SPEED (KNOTS) 15 22 35 25 28 30 18 12 20 18 22 20 35 DAY 5 2 3 29 15 23 4 1 20 8 6 7 DAYS WITH SKY CLEAR (0-2)/8 20 8 8 11 16 20 26 27 28 18 20 17 219 DAYS WITH P.CLOUDY (3-6)/8 5 10 15 12 14 9 5 4 2 9 7 12 104 DAYS WITH CLOUDY (7-8)/8 6 10 8 7 1 1 0 0 0 4 3 2 42 DAYS WITH VISIBILITY =< 2 KM 3 0 0 1 1 1 0 0 0 0 0 3 9 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 881.9 879.6 877.0 876.4 877.3 876.0 874.2 875.6 880.8 884.0 881.5 881.7 878.8 MAX. QFE PRESSURE IN HPA 891.4 885.6 887.3 884.6 883.3 889.3 882.0 881.8 887.5 890.7 888.4 889.1 891.4 DAY-HOUR 9- 6 7- 6 5- 6 19- 9 21- 9 9- 9 24- 6 3- 6 27- 6 29- 6 16- 6 1-18 MIN. QFE PRESSURE IN HPA 872.8 871.8 868.5 865.4 866.0 869.8 867.4 869.5 876.1 877.3 872.9 876.2 865.4 DAY-HOUR 3-12 3- 0 12-12 30-12 1- 0 4-21 1-18 13-15 17-15 16-12 5-15 18-12 MEAN QNH PRESSURE IN HPA 1019.4 1016.8 1013.9 1013.2 1014.2 1012.7 1010.8 1012.3 1018.2 1021.8 1019.0 1019.2 1016.0 MAX. QNH PRESSURE IN HPA 1030.1 1023.6 1025.5 1022.4 1021.0 1027.7 1019.5 1019.3 1025.7 1029.3 1026.7 1027.5 1030.1 DAY-HOUR 9- 6 7- 6 5- 6 19- 9 21- 9 9- 9 24- 6 3- 6 27- 6 29- 6 16- 6 1-18 MIN. QNH PRESSURE IN HPA 1009.2 1008.1 1004.3 1000.8 1001.5 1005.8 1003.1 1005.5 1012.9 1014.2 1009.3 1013.0 1000.8 DAY-HOUR 3-12 3- 0 12-12 30-12 1- 0 4-21 1-18 13-15 17-15 16-12 5-15 18-12 MEAN QFF PRESSURE IN HPA 1020.7 1016.7 1010.9 1008.2 1006.9 1003.0 999.1 1000.8 1008.9 1016.3 1016.1 1018.4 1010.5 MAX. QFF PRESSURE IN HPA 1030.3 1025.0 1026.1 1020.9 1014.5 1020.5 1009.7 1009.2 1019.2 1024.7 1026.0 1027.0 1030.3 DAY-HOUR 9- 3 4- 6 5- 6 3- 6 3- 0 9- 9 24- 6 3- 6 24- 6 29- 6 26- 3 1-15 MIN. QFF PRESSURE IN HPA 1009.8 1009.8 1000.9 995.7 996.6 994.5 991.0 993.7 1002.5 1008.4 1004.4 1010.8 991.0 DAY-HOUR 25-12 3- 0 12-12 30-12 1- 0 30-15 18-21 13-15 12-12 16- 9 5-12 18-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 882.1 879.3 876.9 876.4 877.1 876.2 874.1 875.5 880.6 883.8 881.5 881.8 878.8 MAX. QFE PRESSURE IN HPA 887.5 884.2 884.4 883.2 881.7 882.6 881.0 880.3 886.0 888.8 887.4 888.5 888.8 DAY 29 5 5 20 22 10 24 3 27 30 26 2 MIN. QFE PRESSURE IN HPA 873.9 871.8 869.2 868.4 866.0 869.8 868.6 871.4 877.2 879.1 876.0 877.2 866.0 DAY 25 3 13 30 1 5 19 13 19 16 6 19 MEAN QNH PRESSURE IN HPA 1019.6 1016.5 1013.8 1013.2 1014.0 1012.9 1010.7 1012.3 1018.0 1021.6 1019.0 1019.2 1015.9 MAX. QNH PRESSURE IN HPA 1025.7 1022.0 1022.2 1020.9 1019.2 1020.2 1018.4 1017.6 1024.0 1027.2 1025.6 1026.8 1027.2 DAY 29 5 5 20 22 10 24 3 27 30 26 2 MIN. QNH PRESSURE IN HPA 1010.4 1008.1 1005.1 1004.2 1001.5 1005.8 1004.4 1007.6 1014.1 1016.3 1012.8 1014.1 1001.5 DAY 25 3 13 30 1 5 19 13 19 16 6 19 MEAN QFF PRESSURE IN HPA 1020.2 1016.2 1010.7 1008.1 1006.7 1003.2 998.9 1000.7 1008.5 1015.7 1015.6 1017.9 1010.2 MAX. QFF PRESSURE IN HPA 1027.3 1022.6 1023.1 1017.0 1014.5 1011.9 1008.4 1007.2 1016.3 1022.7 1024.6 1025.3 1027.3 DAY 15 5 5 3 3 10 24 3 24 30 26 2 MIN. QFF PRESSURE IN HPA 1010.4 1009.8 1001.7 999.6 996.6 996.3 991.2 995.3 1003.4 1010.5 1008.1 1011.3 991.2 DAY 25 3 12 30 1 5 19 13 19 16 6 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 881.9 879.4 877.2 876.8 877.6 876.8 875.1 876.3 881.3 884.3 881.6 882.0 879.2 MAX. QFE PRESSURE IN HPA 890.4 884.1 885.5 883.5 882.5 883.1 881.7 880.5 886.1 889.7 887.4 888.0 890.4 DAY 9 7 5 20 30 10 24 3 27 29 26 2 MIN. QFE PRESSURE IN HPA 873.6 872.5 869.5 869.4 867.5 870.3 869.5 872.0 878.0 878.7 876.7 877.4 867.5 DAY 25 3 28 30 1 5 2 13 19 16 5 29 MEAN QNH PRESSURE IN HPA 1019.4 1016.5 1014.2 1013.7 1014.6 1013.7 1011.7 1013.1 1018.7 1022.1 1019.1 1019.5 1016.4 MAX. QNH PRESSURE IN HPA 1029.0 1021.9 1023.5 1021.2 1020.1 1020.8 1019.2 1017.8 1024.1 1028.2 1025.6 1026.3 1029.0 DAY 9 7 5 20 30 10 24 3 27 29 26 2 MIN. QNH PRESSURE IN HPA 1010.1 1008.8 1005.5 1005.3 1003.2 1006.4 1005.5 1008.3 1015.0 1015.8 1013.6 1014.4 1003.2 DAY 25 3 28 30 1 5 2 13 19 16 5 29 MEAN QFF PRESSURE IN HPA 1021.2 1016.9 1011.7 1009.1 1007.7 1004.3 1000.3 1002.1 1010.3 1017.3 1017.0 1019.3 1011.4 MAX. QFF PRESSURE IN HPA 1030.3 1023.8 1025.5 1019.6 1014.1 1013.6 1009.7 1007.8 1018.1 1024.1 1026.0 1026.3 1030.3 DAY 9 4 5 3 3 10 24 3 24 29 26 2 MIN. QFF PRESSURE IN HPA 1010.1 1011.0 1003.8 1001.4 999.8 996.9 993.7 996.7 1005.0 1010.1 1009.2 1013.0 993.7 DAY 25 3 13 30 1 5 2 13 12 16 4 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 882.8 880.6 878.0 877.8 878.2 877.3 875.8 877.1 882.3 885.2 882.7 883.0 880.1 MAX. QFE PRESSURE IN HPA 891.4 885.6 887.3 884.4 883.3 883.8 882.0 881.8 887.5 890.7 888.4 888.8 891.4 DAY 9 7 5 19 30 10 24 3 27 29 16 12 MIN. QFE PRESSURE IN HPA 873.9 875.1 869.8 868.6 869.5 871.1 871.0 872.8 878.5 879.1 876.8 878.3 868.6 DAY 3 3 28 30 1 5 2 13 19 16 5 26 MEAN QNH PRESSURE IN HPA 1020.4 1018.0 1015.0 1014.8 1015.2 1014.2 1012.5 1014.0 1019.9 1023.2 1020.3 1020.6 1017.3 MAX. QNH PRESSURE IN HPA 1030.1 1023.6 1025.5 1022.2 1021.0 1021.5 1019.5 1019.3 1025.7 1029.3 1026.7 1027.2 1030.1 DAY 9 7 5 19 30 10 24 3 27 29 16 12 MIN. QNH PRESSURE IN HPA 1010.4 1011.8 1005.8 1004.4 1005.5 1007.3 1007.2 1009.2 1015.6 1016.3 1013.7 1015.4 1004.4 DAY 3 3 28 30 1 5 2 13 19 16 5 26 MEAN QFF PRESSURE IN HPA 1022.2 1018.2 1012.1 1009.9 1007.9 1004.5 1000.8 1002.6 1010.6 1017.6 1017.7 1020.0 1012.0 MAX. QFF PRESSURE IN HPA 1028.8 1025.0 1026.1 1020.9 1014.3 1013.7 1009.7 1009.2 1019.2 1024.7 1026.0 1025.6 1028.8 DAY 29 4 5 3 30 10 24 3 24 29 27 1 MIN. QFF PRESSURE IN HPA 1012.7 1012.8 1003.2 999.4 1001.7 997.9 995.1 997.1 1004.9 1009.7 1008.9 1013.3 995.1 DAY 25 11 15 30 1 5 5 13 19 16 5 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 882.0 880.1 877.6 877.1 877.8 876.7 875.2 876.5 881.5 884.5 881.7 881.8 879.4 MAX. QFE PRESSURE IN HPA 890.5 885.0 886.6 884.6 883.3 889.3 881.0 881.6 887.0 889.7 887.2 887.8 890.5 DAY 9 4 5 19 21 9 30 3 27 29 16 1 MIN. QFE PRESSURE IN HPA 874.0 875.0 869.8 867.6 869.3 870.8 870.3 871.9 878.0 877.9 874.8 877.7 867.6 DAY 3 1 28 30 1 5 1 13 19 16 5 15 MEAN QNH PRESSURE IN HPA 1019.5 1017.4 1014.6 1014.0 1014.8 1013.6 1011.8 1013.4 1019.0 1022.3 1019.2 1019.3 1016.6 MAX. QNH PRESSURE IN HPA 1029.1 1022.9 1024.7 1022.4 1021.0 1027.7 1018.4 1019.1 1025.1 1028.2 1025.4 1026.0 1029.1 DAY 9 4 5 19 21 9 30 3 27 29 16 1 MIN. QNH PRESSURE IN HPA 1010.5 1011.6 1005.8 1003.3 1005.2 1006.9 1006.4 1008.2 1015.0 1014.9 1011.4 1014.7 1003.3 DAY 3 1 28 30 1 5 1 13 19 16 5 15 MEAN QFF PRESSURE IN HPA 1020.5 1016.9 1011.5 1008.7 1007.3 1003.7 1000.0 1001.7 1009.3 1016.3 1015.8 1017.9 1010.8 MAX. QFF PRESSURE IN HPA 1026.8 1023.6 1024.2 1018.8 1014.5 1020.5 1008.3 1008.8 1017.4 1022.7 1023.3 1024.1 1026.8 DAY 29 4 5 3 2 9 24 3 23 29 26 1 MIN. QFF PRESSURE IN HPA 1012.4 1012.5 1002.9 997.8 1000.9 997.6 993.9 996.1 1004.4 1008.4 1005.8 1011.9 993.9 DAY 25 11 12 30 1 18 5 13 12 16 5 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.9 878.9 876.3 875.6 876.7 875.0 873.5 874.8 879.9 883.2 880.5 880.9 878.0 MAX. QFE PRESSURE IN HPA 889.1 883.0 884.9 883.3 882.3 881.0 878.8 880.1 885.0 888.3 886.0 889.0 889.1 DAY 9 4 5 19 21 9 24 3 27 28 26 2 MIN. QFE PRESSURE IN HPA 872.8 874.8 868.5 865.4 869.3 871.0 868.6 870.4 876.8 877.3 873.1 876.2 865.4 DAY 3 1 12 30 1 18 5 13 19 16 5 18 MEAN QNH PRESSURE IN HPA 1018.2 1016.1 1013.1 1012.4 1013.6 1011.6 1010.0 1011.5 1017.2 1020.9 1017.8 1018.3 1015.0 MAX. QNH PRESSURE IN HPA 1027.5 1020.6 1022.8 1021.0 1019.9 1018.4 1015.9 1017.4 1022.9 1026.6 1024.0 1027.4 1027.5 DAY 9 4 5 19 21 9 24 3 27 28 26 2 MIN. QNH PRESSURE IN HPA 1009.2 1011.4 1004.3 1000.8 1005.2 1007.2 1004.4 1006.5 1013.7 1014.2 1009.5 1013.0 1000.8 DAY 3 1 12 30 1 18 5 13 19 16 5 18 MEAN QFF PRESSURE IN HPA 1018.9 1015.8 1010.0 1007.2 1006.2 1001.7 998.1 999.7 1007.6 1014.9 1014.4 1016.9 1009.3 MAX. QFF PRESSURE IN HPA 1026.1 1021.8 1022.0 1017.3 1013.3 1010.4 1005.7 1007.0 1015.1 1021.7 1022.8 1026.0 1026.1 DAY 29 4 5 3 2 9 24 3 23 29 25 2 MIN. QFF PRESSURE IN HPA 1009.8 1010.6 1000.9 995.7 999.6 996.1 992.3 994.2 1002.5 1008.5 1004.4 1010.8 992.3 DAY 25 11 12 30 27 18 1 13 12 16 5 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 881.4 879.2 876.2 875.3 876.2 874.3 872.6 874.1 879.6 883.4 881.0 881.2 877.9 MAX. QFE PRESSURE IN HPA 889.5 883.4 885.2 882.5 880.9 881.7 877.9 879.1 884.7 888.7 886.4 888.7 889.5 DAY 9 4 5 19 21 9 27 3 27 28 26 1 MIN. QFE PRESSURE IN HPA 873.3 875.2 868.6 867.5 870.7 870.2 868.0 869.5 876.1 879.0 872.9 876.2 867.5 DAY 3 1 12 30 1 15 5 13 17 15 5 18 MEAN QNH PRESSURE IN HPA 1018.9 1016.4 1013.0 1012.0 1013.0 1010.9 1008.9 1010.6 1016.8 1021.0 1018.4 1018.6 1014.9 MAX. QNH PRESSURE IN HPA 1028.0 1021.1 1023.1 1020.1 1018.3 1019.2 1014.9 1016.3 1022.6 1027.1 1024.5 1027.1 1028.0 DAY 9 4 5 19 21 9 27 3 27 28 26 1 MIN. QNH PRESSURE IN HPA 1009.7 1011.9 1004.4 1003.2 1006.8 1006.3 1003.8 1005.5 1012.9 1016.2 1009.3 1013.0 1003.2 DAY 3 1 12 30 1 15 5 13 17 15 5 18 MEAN QFF PRESSURE IN HPA 1020.6 1016.6 1010.4 1007.3 1006.0 1001.4 997.4 999.4 1008.2 1016.2 1016.2 1018.4 1009.8 MAX. QFF PRESSURE IN HPA 1029.5 1023.2 1024.2 1016.5 1013.6 1012.2 1004.5 1006.0 1016.5 1023.0 1024.8 1027.0 1029.5 DAY 9 4 5 3 2 9 24 3 23 29 25 1 MIN. QFF PRESSURE IN HPA 1011.2 1012.0 1002.4 999.8 999.8 994.5 991.3 993.7 1003.2 1010.4 1004.7 1011.3 991.3 DAY 25 21 12 30 15 30 18 13 17 4 5 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 882.6 879.8 876.8 876.2 877.2 875.6 873.6 875.0 880.5 884.0 881.6 881.7 878.7 MAX. QFE PRESSURE IN HPA 888.5 883.8 885.8 883.7 881.8 883.0 879.8 880.2 885.0 888.9 887.2 889.1 889.1 DAY 29 4 5 23 21 9 23 3 23 28 25 1 MIN. QFE PRESSURE IN HPA 875.1 874.6 868.8 867.2 872.3 870.6 867.4 870.6 877.4 878.9 873.9 876.9 867.2 DAY 25 2 12 1 12 15 1 13 17 15 5 18 MEAN QNH PRESSURE IN HPA 1020.2 1017.0 1013.7 1013.0 1014.1 1012.4 1010.1 1011.6 1017.8 1021.7 1019.1 1019.2 1015.8 MAX. QNH PRESSURE IN HPA 1026.8 1021.5 1023.8 1021.4 1019.3 1020.6 1017.0 1017.5 1022.9 1027.3 1025.4 1027.5 1027.5 DAY 29 4 5 23 21 9 23 3 23 28 25 1 MIN. QNH PRESSURE IN HPA 1011.8 1011.2 1004.7 1002.9 1008.6 1006.7 1003.1 1006.7 1014.4 1016.0 1010.4 1013.8 1002.9 DAY 25 2 12 1 12 15 1 13 17 15 5 18 MEAN QFF PRESSURE IN HPA 1021.6 1017.1 1010.8 1008.0 1006.5 1002.7 998.5 1000.2 1008.6 1016.2 1016.4 1018.6 1010.4 MAX. QFF PRESSURE IN HPA 1028.4 1023.1 1023.8 1016.8 1014.3 1013.8 1007.1 1007.2 1017.9 1023.1 1024.9 1026.8 1028.4 DAY 29 4 5 2 2 9 23 3 23 29 25 1 MIN. QFF PRESSURE IN HPA 1013.1 1012.9 1002.8 998.3 1001.1 995.9 991.4 994.8 1003.8 1009.9 1005.5 1012.2 991.4 DAY 25 21 12 30 12 30 18 13 17 15 5 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 882.0 879.7 876.8 876.1 877.3 876.0 873.9 875.4 880.7 884.1 881.5 881.7 878.8 MAX. QFE PRESSURE IN HPA 887.9 884.2 885.6 883.5 882.2 883.1 880.2 880.3 885.7 888.8 887.4 888.9 888.9 DAY 29 4 5 19 21 9 29 3 26 26 25 1 MIN. QFE PRESSURE IN HPA 875.3 873.7 868.5 866.2 872.9 869.8 868.4 871.0 877.4 879.2 874.7 876.9 866.2 DAY 31 2 12 30 12 4 1 12 11 15 5 18 MEAN QNH PRESSURE IN HPA 1019.6 1017.0 1013.7 1012.9 1014.3 1012.8 1010.5 1012.1 1018.0 1021.9 1019.0 1019.2 1015.9 MAX. QNH PRESSURE IN HPA 1026.2 1022.0 1023.6 1021.2 1019.7 1020.8 1017.5 1017.6 1023.7 1027.2 1025.6 1027.3 1027.3 DAY 29 4 5 19 21 9 29 3 26 26 25 1 MIN. QNH PRESSURE IN HPA 1012.0 1010.2 1004.3 1001.7 1009.3 1005.8 1004.2 1007.2 1014.4 1016.4 1011.3 1013.8 1001.7 DAY 31 2 12 30 12 4 1 12 11 15 5 18 MEAN QFF PRESSURE IN HPA 1020.2 1016.3 1010.4 1007.6 1006.7 1002.9 998.8 1000.5 1008.5 1016.0 1015.7 1017.9 1010.1 MAX. QFF PRESSURE IN HPA 1027.5 1022.7 1022.7 1017.0 1014.0 1013.6 1007.2 1007.3 1017.7 1022.2 1024.3 1025.4 1027.5 DAY 14 4 4 2 2 9 23 3 23 29 25 1 MIN. QFF PRESSURE IN HPA 1012.2 1011.2 1002.3 996.4 1001.3 994.9 991.0 995.1 1003.4 1010.0 1005.9 1010.8 991.0 DAY 24 2 11 30 27 30 18 12 17 15 5 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.6 2.4 8.8 20.2 23.4 28.5 30.5 29.0 25.1 16.1 8.1 1.9 16.6 MINIMUN AIR TEMPERATURE (C) 0.8 -2.1 4.0 14.1 17.8 22.1 24.3 22.6 19.5 12.0 5.0 -1.5 11.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 3 20 29 25 10 0 0 0 87 DAYS WITH MINIMUM TEMP. <=-4 1 8 0 0 0 0 0 0 0 0 0 6 15 DAYS WITH FREEZING MIN.<= 0 11 22 1 0 0 0 0 0 0 0 1 24 59 TEMPERATURE RECORDS LOWEST(C) -4.0 -7.4 0.0 6.4 13.0 17.0 19.6 19.8 16.4 7.4 0.0 -5.8 -7.4 DAY 21 19 27 11 24 3 1 14 25 27 30 8 MAXIMUM AIR TEMPERATURE (C) 9.2 7.7 14.1 26.4 29.6 34.7 36.7 35.5 31.5 21.8 12.9 7.3 22.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 13 30 31 31 21 0 0 0 130 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.8 15.0 19.4 31.0 34.4 37.4 39.6 40.0 35.4 27.4 19.4 13.0 40.0 DAY 9 4 17 27 20 9 17 4 9 2 8 20 DIF. BETWEEN (MAX.-MIN.) (C) 8.4 9.8 10.1 12.3 11.8 12.6 12.4 12.9 12.0 9.8 7.9 8.8 10.7 MEAN DAILY TEMP. (MDT) (C) 5.0 2.8 9.0 20.2 23.7 28.4 30.5 29.1 25.5 16.9 9.0 2.9 16.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 29.4 79.6 222.2 284.8 250.7 123.0 1.5 0.0 0.0 991.2 HEATING DEG. DAYS(BASE 18 0C) 390.6 409.6 277.9 20.3 0.0 0.0 0.0 0.0 0.0 57.5 270.5 468.5 1894.9 DEWPOINT (MEAN C) -1.8 -5.2 -2.0 5.2 8.5 9.9 9.2 11.6 8.8 7.1 2.1 -3.0 4.2 MIXING RATIO (G/KG) 3.95 3.12 3.93 6.60 8.16 8.99 8.60 10.28 8.34 7.36 5.20 3.56 6.51 VAPOUR PRESSURE (HPA) 5.55 4.38 5.50 9.21 11.39 12.46 11.90 14.19 11.64 10.30 7.31 5.03 9.07 SATURATION DEF. (HPA) 3.16 3.10 6.17 15.33 18.10 27.51 32.86 26.91 21.14 8.63 3.80 2.17 14.07 RELATIVE HUMIDITY (MEAN %) 67 61 50 39 41 33 28 36 37 57 68 72 49 RELATIVE HUMIDITY (MAX. %) 84 81 69 57 62 47 37 48 46 73 81 85 64 RELATIVE HUMIDITY (MIN. %) 46 39 35 26 28 22 20 26 28 42 54 56 35 RELATIVE HUMIDITY (MEAN% 03UTC) 75 71 59 48 51 37 32 43 39 64 74 77 56 RELATIVE HUMIDITY (MEAN% 09UTC) 54 47 45 31 34 28 26 31 34 48 59 60 41 RELATIVE HUMIDITY (MEAN% 15UTC) 67 60 45 37 36 26 24 33 38 57 70 74 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 52.3 59.5 40.5 4.2 13.6 2.0 0.4 0.0 0.3 100.9 83.3 56.4 413.4 DAYS WITH PRECIPITATION >=10 2 2 1 0 0 0 0 0 0 4 4 3 16 DAYS WITH PRECIPITATION >= 5 4 4 2 0 1 0 0 0 0 6 6 3 26 DAYS WITH PRECIPITATION >= 1 7 8 8 4 4 2 0 0 0 8 9 6 56 DAYS WITH PRECIPITATION 11 10 10 7 10 2 2 0 1 12 11 6 82 GREATEST DAILY PRECIPITATION 17.1 19.0 15.0 1.0 5.0 1.0 0.3 0.0 0.3 39.3 19.8 19.0 39.3 DAY 28 14 27 6 24 27 4 ** 30 9 2 6 DAY WITH THUNDER STORM 0 0 1 2 2 2 0 0 0 4 0 0 11 DAYS WITH SNOW OR SLEET 6 9 2 0 0 0 0 0 0 0 1 5 23 DAYS WITH DUST 1 1 1 1 5 3 0 1 1 0 2 2 18 WIND DIRECTION (PREVAILING) 45 45 45 45 45 225 45 225 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 9.9 8.3 8.2 7.3 8.4 8.4 8.2 7.0 6.9 7.5 6.1 5.9 7.6 PREVAILING WIND PERCENT 6.9 10.7 15.7 13.3 15.7 15.0 12.9 14.9 14.2 15.3 6.3 8.9 11.4 CALMS PERCENT OF WIND 82.3 75.9 62.9 57.1 55.2 60.0 66.1 68.1 61.7 70.2 80.8 82.7 68.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 51 74 319 281 294 243 62 218 209 47 119 98 274 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.7 0.5 1.1 0.7 1.4 0.6 0.8 0.2 0.4 0.2 0.3 0.1 WIND STEADINESES (MEAN %) 11.8 33.3 14.3 28.2 16.7 38.9 23.1 38.1 7.4 16.0 16.7 30.0 3.8 WIND SPEED (MEAN KNOTS) 1.7 2.1 3.5 3.9 4.2 3.6 2.6 2.1 2.7 2.5 1.2 1.0 2.6 FASTEST WIND DIRECTION 50 250 260 280 210 20 30 200 310 270 90 190 210 FASTEST WIND SPEED (KNOTS) 19 35 49 49 54 39 29 14 29 29 16 12 54 DAY 8 1 2 24 14 8 3 13 24 9 28 1 DAYS WITH SKY CLEAR (0-2)/8 13 11 13 6 9 27 27 29 28 13 14 17 207 DAYS WITH P.CLOUDY (3-6)/8 11 10 9 19 17 3 4 2 2 8 7 9 101 DAYS WITH CLOUDY (7-8)/8 7 7 9 5 5 0 0 0 0 10 9 5 57 DAYS WITH VISIBILITY =< 2 KM 6 5 2 0 1 0 0 0 0 2 7 11 34 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 880.0 878.1 877.6 878.3 880.3 875.4 873.6 874.4 880.1 881.4 882.6 882.9 878.7 MAX. QFE PRESSURE IN HPA 888.0 887.7 885.8 888.7 888.2 882.4 880.6 879.9 886.9 890.4 891.4 892.1 892.1 DAY-HOUR 21- 6 11- 6 5- 6 4- 9 10- 6 7- 6 20- 6 28- 6 20- 6 25- 6 18- 6 10- 6 MIN. QFE PRESSURE IN HPA 868.9 868.2 868.5 870.2 875.0 870.5 864.7 866.3 874.6 874.3 875.2 875.2 864.7 DAY-HOUR 29- 0 14- 3 25- 3 18-15 23-15 18-15 31-15 1- 0 11-15 1-15 8-12 28-12 MEAN QNH PRESSURE IN HPA 1017.2 1015.1 1014.6 1015.3 1017.6 1012.1 1010.1 1011.0 1017.4 1018.8 1020.1 1020.5 1015.8 MAX. QNH PRESSURE IN HPA 1026.3 1025.9 1023.8 1027.1 1026.5 1020.0 1017.9 1017.2 1025.0 1029.0 1030.1 1030.9 1030.9 DAY-HOUR 21- 6 11- 6 5- 6 4- 9 10- 6 7- 6 20- 6 28- 6 20- 6 25- 6 18- 6 10- 6 MIN. QNH PRESSURE IN HPA 1004.8 1004.0 1004.3 1006.3 1011.6 1006.6 1000.1 1001.9 1011.2 1010.9 1011.9 1011.9 1000.1 DAY-HOUR 29- 0 14- 3 25- 3 18-15 23-15 18-15 31-15 1- 0 11-15 1-15 8-12 28-12 MEAN QFF PRESSURE IN HPA 1018.5 1017.6 1013.5 1008.6 1009.2 1001.2 998.4 999.8 1008.2 1013.9 1019.5 1023.3 1011.0 MAX. QFF PRESSURE IN HPA 1030.5 1029.7 1024.4 1022.2 1019.5 1009.3 1006.6 1006.8 1017.5 1025.6 1030.8 1036.4 1036.4 DAY-HOUR 21- 6 20- 6 5- 3 4- 9 10-18 3- 6 20- 6 28- 3 20- 6 25- 6 18- 6 10- 6 MIN. QFF PRESSURE IN HPA 1005.5 1004.0 1001.9 997.0 1001.8 994.3 988.8 990.1 1000.7 1003.4 1008.1 1011.9 988.8 DAY-HOUR 17-12 4-15 25- 3 18-12 14-12 18-12 31-15 1- 0 11-12 1-12 8-12 28-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 880.0 877.7 877.5 878.3 880.4 875.4 873.8 874.2 880.2 881.2 882.2 882.9 878.6 MAX. QFE PRESSURE IN HPA 886.7 885.3 884.5 887.0 887.8 881.0 878.5 879.0 884.8 888.2 889.0 890.1 890.1 DAY 19 11 5 5 11 7 20 28 21 25 19 10 MIN. QFE PRESSURE IN HPA 868.9 869.2 870.1 871.3 875.5 872.0 867.0 866.3 875.3 875.6 876.0 876.9 866.3 DAY 29 14 25 19 15 12 30 1 14 21 8 28 MEAN QNH PRESSURE IN HPA 1017.3 1014.7 1014.4 1015.3 1017.7 1012.1 1010.3 1010.7 1017.5 1018.6 1019.8 1020.5 1015.7 MAX. QNH PRESSURE IN HPA 1024.8 1023.2 1022.3 1025.1 1026.0 1018.4 1015.6 1016.2 1022.7 1026.5 1027.4 1028.6 1028.6 DAY 19 11 5 5 11 7 20 28 21 25 19 10 MIN. QNH PRESSURE IN HPA 1004.8 1005.1 1006.1 1007.5 1012.2 1008.3 1002.7 1001.9 1012.0 1012.3 1012.8 1013.8 1001.9 DAY 29 14 25 19 15 12 30 1 14 21 8 28 MEAN QFF PRESSURE IN HPA 1018.1 1016.9 1013.2 1008.4 1009.2 1001.2 998.5 999.3 1008.0 1013.4 1018.8 1023.0 1010.7 MAX. QFF PRESSURE IN HPA 1028.8 1027.3 1022.8 1020.8 1018.8 1007.7 1004.4 1005.4 1014.6 1023.0 1027.2 1033.4 1033.4 DAY 21 20 5 5 11 7 20 29 21 26 18 10 MIN. QFF PRESSURE IN HPA 1006.3 1005.6 1003.9 998.0 1002.2 995.4 990.2 990.1 1002.3 1005.6 1008.5 1015.1 990.1 DAY 29 5 25 19 15 19 30 1 14 1 8 28 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 880.1 877.9 877.7 878.8 880.8 876.3 874.7 875.1 880.8 881.4 882.4 882.8 879.1 MAX. QFE PRESSURE IN HPA 886.8 886.0 885.3 887.5 887.4 881.7 879.9 879.7 885.5 888.8 890.1 890.6 890.6 DAY 21 11 5 4 12 7 20 28 20 25 18 10 MIN. QFE PRESSURE IN HPA 870.3 868.2 868.5 872.7 875.8 872.8 867.3 867.4 876.2 875.8 875.8 876.6 867.3 DAY 29 14 25 18 15 24 31 1 14 21 8 30 MEAN QNH PRESSURE IN HPA 1017.3 1015.0 1014.6 1015.9 1018.1 1013.1 1011.3 1011.7 1018.2 1018.9 1020.0 1020.4 1016.2 MAX. QNH PRESSURE IN HPA 1024.9 1024.0 1023.2 1025.7 1025.6 1019.2 1017.2 1016.9 1023.5 1027.2 1028.6 1029.2 1029.2 DAY 21 11 5 4 12 7 20 28 20 25 18 10 MIN. QNH PRESSURE IN HPA 1006.4 1004.0 1004.3 1009.1 1012.6 1009.2 1003.0 1003.1 1013.0 1012.6 1012.6 1013.5 1003.0 DAY 29 14 25 18 15 24 31 1 14 21 8 30 MEAN QFF PRESSURE IN HPA 1019.1 1018.0 1014.2 1009.9 1010.2 1002.6 1000.0 1001.2 1009.8 1014.7 1019.9 1023.9 1012.0 MAX. QFF PRESSURE IN HPA 1030.0 1028.6 1024.4 1022.1 1018.3 1008.7 1006.0 1006.8 1016.5 1024.5 1030.4 1034.9 1034.9 DAY 21 20 5 4 10 7 20 28 21 25 18 10 MIN. QFF PRESSURE IN HPA 1008.5 1006.1 1001.9 1001.4 1003.9 997.6 991.2 992.1 1004.4 1006.1 1010.0 1015.2 991.2 DAY 29 14 25 18 15 12 30 1 14 1 8 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 881.2 879.0 878.8 879.5 881.5 876.9 875.2 876.0 881.7 882.6 883.7 883.9 880.0 MAX. QFE PRESSURE IN HPA 888.0 887.7 885.8 888.2 888.2 882.4 880.6 879.9 886.9 890.4 891.4 892.1 892.1 DAY 21 11 5 4 10 7 20 28 20 25 18 10 MIN. QFE PRESSURE IN HPA 871.4 869.0 869.8 873.3 876.6 873.5 868.1 868.0 877.6 876.7 877.2 877.3 868.0 DAY 29 14 25 27 15 24 31 1 14 1 8 28 MEAN QNH PRESSURE IN HPA 1018.6 1016.1 1015.9 1016.7 1018.9 1013.8 1011.9 1012.8 1019.1 1020.2 1021.4 1021.7 1017.3 MAX. QNH PRESSURE IN HPA 1026.3 1025.9 1023.8 1026.5 1026.5 1020.0 1017.9 1017.2 1025.0 1029.0 1030.1 1030.9 1030.9 DAY 21 11 5 4 10 7 20 28 20 25 18 10 MIN. QNH PRESSURE IN HPA 1007.6 1004.9 1005.8 1009.7 1013.5 1010.0 1003.9 1003.8 1014.6 1013.6 1014.1 1014.2 1003.8 DAY 29 14 25 27 15 24 31 1 14 1 8 28 MEAN QFF PRESSURE IN HPA 1020.4 1018.9 1014.9 1009.9 1010.4 1003.0 1000.2 1001.6 1009.9 1015.4 1020.9 1024.8 1012.5 MAX. QFF PRESSURE IN HPA 1030.5 1029.7 1023.8 1021.9 1019.3 1009.3 1006.6 1006.6 1017.5 1025.6 1030.8 1036.4 1036.4 DAY 21 20 5 4 10 3 20 31 20 25 18 10 MIN. QFF PRESSURE IN HPA 1009.5 1007.7 1003.9 1000.3 1004.6 998.3 991.5 992.1 1005.3 1006.8 1010.7 1015.2 991.5 DAY 17 14 25 27 23 24 30 1 13 1 8 28 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 880.2 878.5 878.0 878.8 880.9 876.3 874.5 875.2 880.8 881.8 882.9 882.8 879.2 MAX. QFE PRESSURE IN HPA 887.0 886.8 884.5 888.7 888.0 881.7 879.2 879.2 885.7 889.4 890.7 889.9 890.7 DAY 21 11 5 4 10 7 20 27 20 25 18 10 MIN. QFE PRESSURE IN HPA 871.3 869.2 870.4 872.1 875.8 873.0 867.4 867.9 877.0 875.8 876.1 876.2 867.4 DAY 17 14 25 27 23 24 31 1 13 1 8 28 MEAN QNH PRESSURE IN HPA 1017.4 1015.5 1015.0 1015.9 1018.3 1013.1 1011.1 1011.8 1018.1 1019.3 1020.5 1020.5 1016.4 MAX. QNH PRESSURE IN HPA 1025.1 1024.9 1022.3 1027.1 1026.3 1019.2 1016.4 1016.4 1023.7 1027.8 1029.3 1028.4 1029.3 DAY 21 11 5 4 10 7 20 27 20 25 18 10 MIN. QNH PRESSURE IN HPA 1007.5 1005.1 1006.5 1008.4 1012.6 1009.4 1003.1 1003.7 1013.9 1012.6 1012.9 1013.0 1003.1 DAY 17 14 25 27 23 24 31 1 13 1 8 28 MEAN QFF PRESSURE IN HPA 1018.4 1017.6 1013.7 1008.7 1009.7 1002.1 999.2 1000.4 1008.4 1013.9 1019.3 1022.7 1011.2 MAX. QFF PRESSURE IN HPA 1029.2 1027.3 1021.8 1022.2 1018.4 1008.2 1005.0 1005.7 1015.5 1023.6 1028.8 1032.6 1032.6 DAY 20 20 5 4 10 7 20 31 20 25 18 10 MIN. QFF PRESSURE IN HPA 1008.5 1007.7 1004.5 998.8 1003.6 997.4 991.2 991.8 1003.2 1005.1 1008.3 1013.8 991.2 DAY 17 14 25 27 23 24 30 1 11 1 8 28 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 879.0 877.2 876.9 877.4 879.3 874.6 872.8 873.5 879.1 880.6 881.9 882.0 877.9 MAX. QFE PRESSURE IN HPA 886.1 884.9 882.9 886.8 886.0 879.7 877.5 877.5 884.2 888.4 889.8 888.0 889.8 DAY 21 11 15 4 12 6 8 27 20 25 18 10 MIN. QFE PRESSURE IN HPA 869.8 869.7 869.3 870.3 875.1 870.6 865.7 866.8 874.8 874.4 875.2 875.2 865.7 DAY 17 14 25 18 14 18 31 1 13 1 8 28 MEAN QNH PRESSURE IN HPA 1016.2 1014.2 1013.8 1014.3 1016.5 1011.3 1009.2 1009.9 1016.3 1018.0 1019.5 1019.6 1014.9 MAX. QNH PRESSURE IN HPA 1024.1 1022.8 1020.5 1024.9 1024.0 1016.9 1014.5 1014.5 1022.0 1026.7 1028.3 1026.3 1028.3 DAY 21 11 15 4 12 6 8 27 20 25 18 10 MIN. QNH PRESSURE IN HPA 1005.8 1005.7 1005.2 1006.4 1011.8 1006.7 1001.2 1002.4 1011.4 1011.0 1011.9 1011.9 1001.2 DAY 17 14 25 18 14 18 31 1 13 1 8 28 MEAN QFF PRESSURE IN HPA 1016.9 1016.2 1012.5 1007.3 1007.8 1000.3 997.2 998.4 1006.6 1012.8 1018.5 1022.0 1009.7 MAX. QFF PRESSURE IN HPA 1027.8 1025.4 1019.7 1020.3 1015.8 1006.6 1003.0 1003.6 1013.7 1022.9 1028.1 1030.6 1030.6 DAY 21 20 5 4 11 6 20 28 20 25 18 10 MIN. QFF PRESSURE IN HPA 1005.5 1004.4 1003.4 997.0 1001.8 994.3 989.4 990.4 1000.7 1003.4 1008.1 1011.9 989.4 DAY 17 4 25 18 14 18 31 7 11 1 8 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 879.4 877.7 876.8 877.3 879.0 873.9 872.0 873.0 878.8 880.7 882.3 882.5 877.8 MAX. QFE PRESSURE IN HPA 886.4 884.8 883.0 886.6 885.5 878.9 876.7 877.1 883.7 888.4 890.1 888.9 890.1 DAY 21 11 15 4 10 6 8 27 20 25 18 9 MIN. QFE PRESSURE IN HPA 869.8 869.0 869.6 870.2 875.0 870.5 864.7 866.9 874.6 874.3 875.7 876.2 864.7 DAY 17 4 25 18 23 18 31 1 11 1 8 28 MEAN QNH PRESSURE IN HPA 1016.6 1014.7 1013.7 1014.2 1016.1 1010.4 1008.3 1009.3 1015.9 1018.1 1019.8 1020.1 1014.8 MAX. QNH PRESSURE IN HPA 1024.5 1022.7 1020.6 1024.7 1023.5 1016.0 1013.6 1014.0 1021.4 1026.7 1028.6 1027.3 1028.6 DAY 21 11 15 4 10 6 8 27 20 25 18 9 MIN. QNH PRESSURE IN HPA 1005.8 1004.9 1005.6 1006.3 1011.6 1006.6 1000.1 1002.5 1011.2 1010.9 1012.4 1013.0 1000.1 DAY 17 4 25 18 23 18 31 1 11 1 8 28 MEAN QFF PRESSURE IN HPA 1018.4 1017.6 1013.1 1008.0 1008.2 999.7 996.8 998.6 1007.3 1013.9 1019.8 1023.6 1010.4 MAX. QFF PRESSURE IN HPA 1029.4 1026.2 1020.7 1021.4 1016.5 1005.9 1002.7 1004.1 1014.4 1024.6 1029.8 1033.0 1033.0 DAY 21 19 5 4 10 6 8 28 20 25 18 9 MIN. QFF PRESSURE IN HPA 1006.7 1004.0 1004.4 998.3 1003.3 994.8 988.8 990.8 1001.4 1003.8 1009.2 1013.6 988.8 DAY 17 4 25 18 31 18 31 7 11 1 8 28 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 880.0 878.5 877.7 878.1 880.3 874.7 872.9 874.0 879.8 881.4 882.7 883.1 878.6 MAX. QFE PRESSURE IN HPA 887.4 884.9 884.1 887.6 888.2 880.1 877.5 878.2 884.7 888.3 890.3 890.0 890.3 DAY 18 11 15 4 10 6 8 27 20 25 18 9 MIN. QFE PRESSURE IN HPA 871.9 870.3 871.4 871.3 876.0 870.6 866.1 868.2 875.2 875.8 876.1 877.1 866.1 DAY 28 4 2 18 22 14 31 7 13 1 8 28 MEAN QNH PRESSURE IN HPA 1017.3 1015.6 1014.7 1015.2 1017.6 1011.4 1009.3 1010.5 1017.1 1018.9 1020.3 1020.8 1015.7 MAX. QNH PRESSURE IN HPA 1025.6 1022.8 1021.9 1025.8 1026.5 1017.4 1014.5 1015.3 1022.6 1026.6 1028.9 1028.5 1028.9 DAY 18 11 15 4 10 6 8 27 20 25 18 9 MIN. QNH PRESSURE IN HPA 1008.2 1006.4 1007.6 1007.5 1012.8 1006.7 1001.6 1004.0 1011.9 1012.6 1012.9 1014.0 1001.6 DAY 28 4 2 18 22 14 31 7 13 1 8 28 MEAN QFF PRESSURE IN HPA 1019.0 1018.2 1013.4 1008.3 1009.0 1000.6 997.6 999.4 1008.0 1014.1 1019.9 1023.9 1011.0 MAX. QFF PRESSURE IN HPA 1029.4 1028.2 1020.4 1021.8 1019.5 1006.7 1003.5 1004.7 1015.4 1023.6 1029.2 1034.0 1034.0 DAY 20 19 5 4 10 6 8 31 20 25 18 9 MIN. QFF PRESSURE IN HPA 1009.0 1006.2 1004.2 999.4 1003.5 994.9 989.5 991.7 1002.1 1005.2 1009.2 1015.0 989.5 DAY 31 4 24 18 22 18 29 7 11 1 8 28 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 880.0 878.4 877.6 878.3 880.4 875.0 873.2 874.4 880.0 881.4 882.6 883.1 878.7 MAX. QFE PRESSURE IN HPA 887.2 884.5 884.4 888.1 888.2 881.0 878.5 879.0 885.0 887.9 889.8 890.0 890.0 DAY 18 10 15 4 10 6 8 27 20 25 18 9 MIN. QFE PRESSURE IN HPA 870.4 870.5 870.9 871.7 875.9 870.6 866.1 868.9 875.1 876.0 875.9 877.5 866.1 DAY 28 4 24 27 14 14 31 1 13 20 6 27 MEAN QNH PRESSURE IN HPA 1017.3 1015.5 1014.6 1015.4 1017.7 1011.7 1009.7 1011.0 1017.3 1018.8 1020.2 1020.7 1015.8 MAX. QNH PRESSURE IN HPA 1025.4 1022.3 1022.2 1026.4 1026.5 1018.4 1015.6 1016.2 1022.9 1026.2 1028.3 1028.5 1028.5 DAY 18 10 15 4 10 6 8 27 20 25 18 9 MIN. QNH PRESSURE IN HPA 1006.5 1006.6 1007.0 1007.9 1012.7 1006.7 1001.6 1004.8 1011.8 1012.8 1012.7 1014.5 1001.6 DAY 28 4 24 27 14 14 31 1 13 20 6 27 MEAN QFF PRESSURE IN HPA 1018.2 1017.5 1013.2 1008.0 1009.1 1000.7 997.9 999.6 1007.8 1013.6 1019.1 1023.0 1010.7 MAX. QFF PRESSURE IN HPA 1028.9 1027.4 1020.5 1022.1 1019.1 1008.0 1003.9 1005.5 1014.8 1022.6 1027.8 1032.7 1032.7 DAY 20 19 5 4 10 6 8 31 20 25 18 9 MIN. QFF PRESSURE IN HPA 1008.0 1006.0 1003.3 998.5 1002.7 995.3 989.9 991.9 1001.9 1005.3 1008.6 1015.4 989.9 DAY 28 4 24 27 22 18 29 7 13 1 7 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.1 4.9 8.2 15.2 22.4 28.4 32.1 31.2 25.4 18.1 13.0 5.8 17.1 MINIMUN AIR TEMPERATURE (C) -4.1 0.8 2.5 10.1 17.5 21.8 25.5 25.1 20.2 12.9 9.0 2.1 11.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 20 29 27 8 0 0 0 88 DAYS WITH MINIMUM TEMP. <=-4 17 1 0 0 0 0 0 0 0 0 0 0 18 DAYS WITH FREEZING MIN.<= 0 30 9 7 0 0 0 0 0 0 0 0 16 62 TEMPERATURE RECORDS LOWEST(C) -9.6 -4.6 -3.4 4.0 11.6 17.0 19.4 19.0 16.0 9.0 4.2 -2.0 -9.6 DAY 28 23 1 1 3 9 1 30 17 11 26 28 MAXIMUM AIR TEMPERATURE (C) 5.5 10.7 13.8 20.7 27.8 34.3 38.2 37.2 31.5 24.7 18.8 10.5 22.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 29 31 31 23 2 0 0 124 DAYS WITH MAXIMUM TEMP. <= 0 4 0 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS HIGHEST(C) 12.2 13.2 22.0 26.4 32.2 38.2 40.4 41.4 35.8 30.0 24.0 18.4 41.4 DAY 2 9 28 18 23 18 23 14 7 2 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 9.9 11.3 10.6 10.3 12.5 12.7 12.1 11.3 11.8 9.8 8.4 10.9 MEAN DAILY TEMP. (MDT) (C) 0.7 5.7 8.2 15.4 22.6 28.0 31.9 31.1 25.9 18.8 13.9 6.3 17.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 66.6 211.3 337.0 313.3 146.8 12.1 0.0 0.0 1087.1 HEATING DEG. DAYS(BASE 18 0C) 536.8 343.6 304.8 86.0 2.2 0.0 0.0 0.0 0.0 19.4 123.7 362.2 1778.7 DEWPOINT (MEAN C) -5.2 -4.5 -2.2 3.2 7.9 8.3 9.2 11.5 9.3 3.2 3.3 -0.4 3.6 MIXING RATIO (G/KG) 3.05 3.22 3.82 5.58 7.83 8.03 8.61 10.01 8.63 5.62 5.58 4.33 6.19 VAPOUR PRESSURE (HPA) 4.30 4.53 5.36 7.81 10.91 11.16 11.92 13.83 12.00 7.89 7.86 6.10 8.64 SATURATION DEF. (HPA) 2.08 4.38 5.95 10.10 16.94 28.52 36.99 32.82 21.37 13.66 7.56 3.51 15.32 RELATIVE HUMIDITY (MEAN %) 70 53 51 47 41 30 25 31 38 39 54 66 45 RELATIVE HUMIDITY (MAX. %) 84 70 69 64 56 42 36 42 49 50 69 78 59 RELATIVE HUMIDITY (MIN. %) 50 35 36 33 28 20 18 23 29 29 41 52 33 RELATIVE HUMIDITY (MEAN% 03UTC) 77 63 61 57 49 39 29 40 45 44 60 74 53 RELATIVE HUMIDITY (MEAN% 09UTC) 57 41 42 39 37 26 23 27 35 32 45 57 38 RELATIVE HUMIDITY (MEAN% 15UTC) 70 49 46 42 35 23 21 27 35 38 56 66 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.9 15.2 33.2 19.3 10.9 2.3 0.0 0.0 12.0 4.3 27.3 53.3 217.7 DAYS WITH PRECIPITATION >=10 2 0 1 0 0 0 0 0 0 0 1 1 5 DAYS WITH PRECIPITATION >= 5 3 1 3 1 0 0 0 0 1 0 1 4 14 DAYS WITH PRECIPITATION >= 1 6 4 6 10 4 1 0 0 2 1 7 7 48 DAYS WITH PRECIPITATION 10 6 9 11 13 3 0 0 2 1 8 9 72 GREATEST DAILY PRECIPITATION 15.0 7.0 15.0 6.0 3.3 2.0 0.0 0.0 8.0 4.3 14.8 25.0 25.0 DAY 9 17 16 25 29 2 ** ** 15 7 26 11 DAY WITH THUNDER STORM 0 0 0 3 3 1 0 0 3 2 3 0 15 DAYS WITH SNOW OR SLEET 7 1 1 0 0 0 0 0 0 0 0 5 14 DAYS WITH DUST 3 3 4 1 7 3 5 6 2 0 0 3 37 WIND DIRECTION (PREVAILING) 45 45 225 45 45 225 225 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 6.0 6.5 7.8 7.7 8.7 7.6 7.3 6.1 6.4 6.1 6.2 6.1 7.0 PREVAILING WIND PERCENT 5.7 14.7 13.8 22.5 27.5 17.9 16.5 18.9 24.2 25.0 20.4 12.9 18.2 CALMS PERCENT OF WIND 80.6 55.8 42.1 37.1 20.2 35.4 48.4 48.9 53.8 54.0 55.4 71.0 50.2 NO. OF WIND OBSERVATION 247 224 247 240 247 240 248 233 240 248 240 248 2902 VECTOR WIND DIRECTION (MEAN) 134 280 226 356 355 198 203 188 54 48 319 115 290 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.5 0.8 0.7 0.8 0.6 0.8 0.5 0.6 0.7 0.4 0.3 0.1 WIND STEADINESES (MEAN %) 7.7 14.3 16.3 13.7 10.8 11.8 22.2 15.6 19.4 24.1 12.5 16.7 2.6 WIND SPEED (MEAN KNOTS) 1.3 3.5 4.9 5.1 7.4 5.1 3.6 3.2 3.1 2.9 3.2 1.8 3.8 FASTEST WIND DIRECTION 230 270 270 210 300 300 160 200 300 240 270 40 300 FASTEST WIND SPEED (KNOTS) 17 25 31 39 49 39 21 14 39 16 25 14 49 DAY 24 22 5 18 24 2 26 20 13 4 19 11 DAYS WITH SKY CLEAR (0-2)/8 15 16 15 8 7 25 30 29 25 27 12 13 222 DAYS WITH P.CLOUDY (3-6)/8 7 9 6 16 17 5 1 2 5 4 13 10 95 DAYS WITH CLOUDY (7-8)/8 9 3 10 6 7 0 0 0 0 0 5 8 48 DAYS WITH VISIBILITY =< 2 KM 10 1 1 0 0 0 0 0 2 0 1 5 20 DURATION OF SUNSHINE HOURS ****** ****** 201.5 174.3 216.4 335.7 352.4 297.8 294.3 283.6 191.8 101.6 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 881.3 879.6 878.8 878.3 877.4 875.6 873.2 873.7 877.5 882.4 884.2 883.3 878.8 MAX. QFE PRESSURE IN HPA 893.6 887.2 887.0 883.8 883.7 884.4 880.9 879.6 882.7 889.6 893.8 892.2 893.8 DAY-HOUR 8- 6 10- 6 26- 6 29- 6 19- 3 1- 6 12- 6 17- 6 30- 6 28- 6 26- 6 4- 6 MIN. QFE PRESSURE IN HPA 866.7 868.9 867.4 873.3 872.9 869.1 865.3 867.8 871.6 874.2 876.9 873.8 865.3 DAY-HOUR 24-12 17-15 5-15 23- 9 3-12 28-15 27-15 4-15 8-15 4-15 12-12 12- 3 MEAN QNH PRESSURE IN HPA 1018.7 1016.8 1015.9 1015.4 1014.4 1012.3 1009.6 1010.2 1014.4 1020.0 1022.0 1021.0 1015.9 MAX. QNH PRESSURE IN HPA 1032.6 1025.4 1025.1 1021.5 1021.4 1022.2 1018.3 1016.8 1020.3 1028.1 1032.8 1031.0 1032.8 DAY-HOUR 8- 6 10- 6 26- 6 29- 6 19- 3 1- 6 12- 6 17- 6 30- 6 28- 6 26- 6 4- 6 MIN. QNH PRESSURE IN HPA 1002.3 1004.8 1003.1 1009.7 1009.3 1005.0 1000.7 1003.5 1007.8 1010.7 1013.8 1010.3 1000.7 DAY-HOUR 24-12 17-15 5-15 23- 9 3-12 28-15 27-15 4-15 8-15 4-15 12-12 12- 3 MEAN QFF PRESSURE IN HPA 1022.5 1018.0 1015.3 1011.1 1006.4 1001.6 997.2 998.1 1005.0 1014.3 1018.9 1021.7 1010.8 MAX. QFF PRESSURE IN HPA 1036.7 1029.4 1023.8 1018.2 1013.6 1013.6 1006.7 1004.4 1013.3 1022.4 1033.8 1030.1 1036.7 DAY-HOUR 8- 6 23- 6 19- 3 14- 3 19- 3 1- 6 1- 6 30- 6 15- 9 28- 3 26- 6 25- 6 MIN. QFF PRESSURE IN HPA 1003.4 1004.6 1000.9 1003.3 1001.4 994.9 988.0 991.5 996.1 1002.3 1008.2 1008.8 988.0 DAY-HOUR 24- 9 17-21 5-15 23- 9 29-12 20-21 27-15 4-12 8-12 4-12 12-12 12-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 881.0 879.3 878.6 878.2 877.3 875.6 873.1 873.5 877.3 882.3 884.1 883.2 878.6 MAX. QFE PRESSURE IN HPA 891.9 886.4 885.0 883.3 882.6 881.7 880.0 876.4 881.3 888.3 889.2 890.1 891.9 DAY 8 11 26 30 19 1 12 17 30 29 5 4 MIN. QFE PRESSURE IN HPA 869.6 870.1 870.3 875.1 873.2 870.5 866.0 868.6 873.2 875.6 878.2 874.8 866.0 DAY 25 18 6 3 4 29 28 5 9 4 13 12 MEAN QNH PRESSURE IN HPA 1018.4 1016.5 1015.7 1015.2 1014.2 1012.3 1009.5 1010.0 1014.3 1019.9 1021.9 1020.9 1015.7 MAX. QNH PRESSURE IN HPA 1030.7 1024.5 1022.9 1021.0 1020.2 1019.2 1017.3 1013.2 1018.7 1026.6 1027.6 1028.6 1030.7 DAY 8 11 26 30 19 1 12 17 30 29 5 4 MIN. QNH PRESSURE IN HPA 1005.6 1006.1 1006.4 1011.8 1009.6 1006.6 1001.5 1004.4 1009.6 1012.3 1015.3 1011.4 1001.5 DAY 25 18 6 3 4 29 28 5 9 4 13 12 MEAN QFF PRESSURE IN HPA 1021.8 1017.3 1014.8 1011.0 1006.2 1001.5 997.0 997.7 1004.5 1013.8 1018.4 1021.3 1010.4 MAX. QFF PRESSURE IN HPA 1034.4 1026.4 1023.8 1016.6 1011.3 1010.7 1004.8 1001.0 1010.9 1020.6 1028.6 1027.9 1034.4 DAY 8 23 19 14 7 1 1 31 30 29 27 25 MIN. QFF PRESSURE IN HPA 1008.6 1006.9 1004.8 1007.0 1002.0 994.9 988.5 992.6 997.9 1003.6 1010.2 1010.8 988.5 DAY 25 18 6 18 29 21 28 5 8 4 13 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 881.0 879.5 879.1 878.5 877.9 876.3 874.0 874.6 877.9 882.8 884.5 883.3 879.1 MAX. QFE PRESSURE IN HPA 891.9 886.8 885.8 883.7 883.7 883.3 880.0 878.8 881.5 888.5 892.0 891.0 892.0 DAY 8 11 26 30 19 1 12 18 30 28 26 4 MIN. QFE PRESSURE IN HPA 870.4 870.9 870.8 874.8 874.2 871.7 866.9 870.0 873.9 875.5 879.0 873.8 866.9 DAY 25 18 6 10 4 21 28 5 8 4 11 12 MEAN QNH PRESSURE IN HPA 1018.4 1016.7 1016.3 1015.6 1014.9 1013.2 1010.5 1011.2 1015.0 1020.4 1022.3 1021.0 1016.3 MAX. QNH PRESSURE IN HPA 1030.7 1024.9 1023.8 1021.4 1021.4 1021.0 1017.3 1015.9 1019.0 1026.8 1030.8 1029.6 1030.8 DAY 8 11 26 30 19 1 12 18 30 28 26 4 MIN. QNH PRESSURE IN HPA 1006.5 1007.0 1006.9 1011.4 1010.7 1007.9 1002.5 1006.0 1010.4 1012.2 1016.2 1010.3 1002.5 DAY 25 18 6 10 4 21 28 5 8 4 11 12 MEAN QFF PRESSURE IN HPA 1023.0 1018.5 1016.2 1011.9 1007.4 1002.9 998.6 999.6 1006.2 1015.7 1020.0 1022.2 1011.9 MAX. QFF PRESSURE IN HPA 1035.5 1029.3 1023.8 1018.2 1013.6 1012.9 1006.1 1004.3 1012.3 1022.4 1030.7 1029.5 1035.5 DAY 8 23 19 14 19 1 1 18 30 28 26 25 MIN. QFF PRESSURE IN HPA 1008.2 1008.3 1005.3 1006.4 1002.4 996.2 989.9 994.7 999.8 1004.8 1012.8 1010.1 989.9 DAY 24 18 6 10 29 21 28 5 8 4 13 12 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 882.4 880.6 880.0 879.3 878.5 877.0 874.7 875.3 879.0 883.9 885.5 884.4 880.0 MAX. QFE PRESSURE IN HPA 893.6 887.2 887.0 883.8 882.6 884.4 880.9 879.6 882.7 889.6 893.8 892.2 893.8 DAY 8 10 26 29 16 1 12 17 30 28 26 4 MIN. QFE PRESSURE IN HPA 871.1 872.3 871.9 875.2 875.3 872.5 867.4 871.0 874.6 876.7 879.5 874.3 867.4 DAY 24 17 6 23 3 21 28 5 8 4 12 12 MEAN QNH PRESSURE IN HPA 1019.9 1018.0 1017.3 1016.4 1015.6 1013.9 1011.3 1012.0 1016.1 1021.6 1023.5 1022.3 1017.3 MAX. QNH PRESSURE IN HPA 1032.6 1025.4 1025.1 1021.5 1020.2 1022.2 1018.3 1016.8 1020.3 1028.1 1032.8 1031.0 1032.8 DAY 8 10 26 29 16 1 12 17 30 28 26 4 MIN. QNH PRESSURE IN HPA 1007.3 1008.6 1008.2 1011.9 1012.0 1008.8 1003.1 1007.2 1011.2 1013.6 1016.7 1010.9 1003.1 DAY 24 17 6 23 3 21 28 5 8 4 12 12 MEAN QFF PRESSURE IN HPA 1024.1 1019.5 1016.8 1012.1 1007.5 1003.1 998.9 999.9 1006.8 1015.9 1020.5 1023.2 1012.4 MAX. QFF PRESSURE IN HPA 1036.7 1029.4 1023.5 1018.1 1012.7 1013.6 1006.7 1004.4 1013.0 1022.0 1033.8 1030.1 1036.7 DAY 8 23 26 14 7 1 1 30 15 28 26 25 MIN. QFF PRESSURE IN HPA 1008.9 1009.4 1007.8 1005.9 1004.2 996.5 990.5 995.1 999.9 1005.4 1012.5 1010.7 990.5 DAY 24 17 6 23 30 21 27 5 8 4 12 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.3 880.1 879.2 878.8 877.8 876.3 873.9 874.5 878.2 882.9 884.4 883.3 879.2 MAX. QFE PRESSURE IN HPA 891.7 887.1 886.3 883.7 882.2 882.9 879.4 878.6 882.3 888.7 893.6 890.8 893.6 DAY 8 10 26 29 16 1 11 17 30 28 26 4 MIN. QFE PRESSURE IN HPA 867.0 870.0 869.5 873.3 874.3 872.1 867.0 870.4 873.9 875.6 878.2 873.8 867.0 DAY 24 17 6 23 3 21 28 5 8 4 12 12 MEAN QNH PRESSURE IN HPA 1018.8 1017.3 1016.4 1015.9 1014.8 1013.1 1010.4 1011.1 1015.3 1020.6 1022.2 1021.0 1016.4 MAX. QNH PRESSURE IN HPA 1030.4 1025.3 1024.4 1021.4 1019.7 1020.5 1016.6 1015.7 1019.9 1027.1 1032.6 1029.4 1032.6 DAY 8 10 26 29 16 1 11 17 30 28 26 4 MIN. QNH PRESSURE IN HPA 1002.7 1006.0 1005.5 1009.7 1010.9 1008.4 1002.7 1006.5 1010.4 1012.3 1015.3 1010.3 1002.7 DAY 24 17 6 23 3 21 28 5 8 4 12 12 MEAN QFF PRESSURE IN HPA 1021.9 1017.8 1015.5 1011.2 1006.5 1002.2 997.8 998.7 1005.5 1014.4 1018.7 1021.2 1011.0 MAX. QFF PRESSURE IN HPA 1033.7 1028.2 1023.3 1018.0 1011.1 1011.5 1005.5 1002.8 1013.3 1020.3 1033.7 1028.7 1033.7 DAY 8 23 19 13 7 1 1 31 15 28 26 23 MIN. QFF PRESSURE IN HPA 1003.4 1006.2 1004.2 1003.3 1003.1 996.1 989.6 994.3 998.7 1003.9 1010.2 1009.0 989.6 DAY 24 17 6 23 30 21 27 5 8 4 12 12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.5 878.7 877.7 877.6 876.7 874.9 872.6 872.8 876.4 881.4 883.2 882.4 877.9 MAX. QFE PRESSURE IN HPA 890.7 885.6 884.8 882.2 880.8 881.3 878.1 877.0 880.4 887.6 892.1 888.8 892.1 DAY 8 10 26 29 16 1 11 17 30 28 26 4 MIN. QFE PRESSURE IN HPA 866.7 869.2 867.7 873.8 872.9 870.5 865.9 868.6 871.9 874.3 876.9 873.9 865.9 DAY 24 17 5 2 3 28 27 4 8 4 12 12 MEAN QNH PRESSURE IN HPA 1017.8 1015.9 1014.7 1014.6 1013.5 1011.5 1009.0 1009.1 1013.3 1018.8 1020.9 1020.0 1014.9 MAX. QNH PRESSURE IN HPA 1029.3 1023.6 1022.7 1019.7 1018.2 1018.7 1015.1 1013.9 1017.7 1025.8 1030.9 1027.2 1030.9 DAY 8 10 26 29 16 1 11 17 30 28 26 4 MIN. QNH PRESSURE IN HPA 1002.3 1005.1 1003.4 1010.3 1009.3 1006.6 1001.4 1004.4 1008.2 1010.9 1013.8 1010.4 1001.4 DAY 24 17 5 2 3 28 27 4 8 4 12 12 MEAN QFF PRESSURE IN HPA 1021.2 1016.6 1013.8 1010.2 1005.5 1000.6 996.4 996.8 1003.4 1012.6 1017.3 1020.3 1009.6 MAX. QFF PRESSURE IN HPA 1032.9 1025.6 1021.4 1015.8 1009.9 1010.0 1004.7 1001.3 1010.1 1018.5 1032.2 1028.0 1032.9 DAY 8 23 19 14 7 1 1 17 15 29 26 25 MIN. QFF PRESSURE IN HPA 1004.2 1005.7 1001.6 1005.4 1001.4 995.6 988.0 991.5 996.1 1002.3 1008.2 1008.8 988.0 DAY 24 17 5 23 29 21 27 4 8 4 12 12 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 881.1 879.2 878.0 877.4 876.5 874.2 871.8 872.3 876.2 881.4 883.7 882.9 877.9 MAX. QFE PRESSURE IN HPA 890.9 885.8 884.3 881.9 880.6 880.8 877.1 876.3 880.3 888.2 891.6 888.9 891.6 DAY 8 10 26 29 16 4 1 17 30 28 26 4 MIN. QFE PRESSURE IN HPA 867.1 868.9 867.4 873.9 872.9 869.1 865.3 867.8 871.6 874.2 876.9 875.3 865.3 DAY 24 17 5 2 3 28 27 4 8 4 12 12 MEAN QNH PRESSURE IN HPA 1018.5 1016.4 1015.1 1014.3 1013.4 1010.7 1008.1 1008.7 1013.0 1018.8 1021.4 1020.6 1014.9 MAX. QNH PRESSURE IN HPA 1029.5 1023.8 1022.1 1019.4 1017.9 1018.2 1014.0 1013.1 1017.6 1026.5 1030.3 1027.3 1030.3 DAY 8 10 26 29 16 4 1 17 30 28 26 4 MIN. QNH PRESSURE IN HPA 1002.8 1004.8 1003.1 1010.4 1009.3 1005.0 1000.7 1003.5 1007.8 1010.7 1013.8 1012.0 1000.7 DAY 24 17 5 2 3 28 27 4 8 4 12 12 MEAN QFF PRESSURE IN HPA 1023.0 1018.0 1014.9 1010.4 1005.9 1000.4 996.0 997.0 1004.2 1014.1 1019.0 1021.8 1010.4 MAX. QFF PRESSURE IN HPA 1034.3 1026.5 1022.6 1016.4 1011.5 1009.4 1003.3 1002.2 1010.6 1022.1 1031.4 1029.3 1034.3 DAY 8 23 19 13 6 1 1 31 15 28 26 25 MIN. QFF PRESSURE IN HPA 1004.6 1005.5 1000.9 1005.2 1001.8 995.1 988.0 991.7 996.9 1003.6 1010.0 1011.7 988.0 DAY 24 17 5 23 20 28 27 4 8 3 12 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 881.7 879.9 879.0 878.3 877.6 875.1 872.6 873.1 877.2 882.4 884.3 883.5 878.7 MAX. QFE PRESSURE IN HPA 891.7 886.4 885.1 883.4 883.1 882.0 878.5 877.0 882.5 888.5 891.3 889.1 891.7 DAY 7 10 26 29 18 1 11 31 30 28 26 3 MIN. QFE PRESSURE IN HPA 867.8 868.9 869.8 874.6 873.3 870.5 866.0 868.9 872.8 875.0 878.1 876.4 866.0 DAY 24 17 5 3 3 28 27 4 8 4 12 13 MEAN QNH PRESSURE IN HPA 1019.1 1017.2 1016.1 1015.4 1014.5 1011.8 1009.0 1009.5 1014.1 1019.9 1022.1 1021.2 1015.8 MAX. QNH PRESSURE IN HPA 1030.4 1024.5 1023.0 1021.1 1020.8 1019.5 1015.6 1013.9 1020.1 1026.8 1030.0 1027.5 1030.4 DAY 7 10 26 29 18 1 11 31 30 28 26 3 MIN. QNH PRESSURE IN HPA 1003.5 1004.8 1005.8 1011.2 1009.7 1006.6 1001.5 1004.8 1009.2 1011.6 1015.1 1013.2 1001.5 DAY 24 17 5 3 3 28 27 4 8 4 12 13 MEAN QFF PRESSURE IN HPA 1023.3 1018.6 1015.6 1011.0 1006.5 1001.2 996.7 997.6 1004.9 1014.3 1019.1 1022.1 1010.9 MAX. QFF PRESSURE IN HPA 1035.3 1026.2 1023.8 1017.5 1012.1 1010.6 1003.6 1003.1 1012.2 1021.1 1031.0 1029.7 1035.3 DAY 7 23 18 13 18 1 1 31 30 28 26 25 MIN. QFF PRESSURE IN HPA 1005.8 1005.4 1004.2 1006.2 1002.7 995.5 988.5 992.7 998.1 1004.1 1010.7 1012.8 988.5 DAY 24 17 5 23 28 20 27 4 8 4 12 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 881.4 879.7 878.9 878.5 877.5 875.4 872.9 873.2 877.4 882.5 884.2 883.5 878.8 MAX. QFE PRESSURE IN HPA 892.0 886.4 885.5 883.6 882.0 882.2 878.8 877.0 882.5 888.3 889.5 889.5 892.0 DAY 7 10 26 29 31 4 11 31 30 28 5 3 MIN. QFE PRESSURE IN HPA 868.6 868.9 870.0 874.6 873.2 869.9 866.0 868.5 872.8 875.2 878.5 875.6 866.0 DAY 24 17 5 3 29 28 27 4 8 4 12 11 MEAN QNH PRESSURE IN HPA 1018.9 1016.9 1016.0 1015.6 1014.5 1012.1 1009.2 1009.7 1014.4 1020.1 1021.9 1021.2 1015.9 MAX. QNH PRESSURE IN HPA 1030.8 1024.5 1023.5 1021.3 1019.5 1019.7 1015.9 1013.9 1020.1 1026.6 1028.0 1028.0 1030.8 DAY 7 10 26 29 31 4 11 31 30 28 5 3 MIN. QNH PRESSURE IN HPA 1004.4 1004.8 1006.0 1011.2 1009.6 1005.9 1001.5 1004.3 1009.2 1011.9 1015.6 1012.3 1001.5 DAY 24 17 5 3 29 28 27 4 8 4 12 11 MEAN QFF PRESSURE IN HPA 1022.1 1017.6 1015.0 1010.9 1006.3 1001.3 996.6 997.5 1004.8 1014.0 1018.5 1021.4 1010.5 MAX. QFF PRESSURE IN HPA 1034.2 1025.9 1023.3 1017.6 1011.6 1010.1 1003.1 1003.0 1011.8 1020.4 1029.1 1028.2 1034.2 DAY 7 23 18 13 6 4 11 31 30 28 26 25 MIN. QFF PRESSURE IN HPA 1006.4 1004.6 1004.2 1006.1 1002.5 994.9 988.4 992.3 997.8 1003.7 1010.4 1011.6 988.4 DAY 24 17 5 23 29 20 27 4 8 4 12 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.6 2.9 11.8 17.5 18.7 28.2 30.8 30.7 25.7 17.1 11.2 1.5 16.7 MINIMUN AIR TEMPERATURE (C) 1.1 -0.7 7.9 12.3 13.5 22.0 25.2 25.3 20.2 12.5 7.9 -1.0 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 20 31 28 7 0 0 0 86 DAYS WITH MINIMUM TEMP. <=-4 2 5 0 0 0 0 0 0 0 0 0 0 7 DAYS WITH FREEZING MIN.<= 0 5 18 0 0 0 0 0 0 0 0 0 22 45 TEMPERATURE RECORDS LOWEST(C) -9.2 -7.2 0.4 5.0 5.0 17.0 22.2 20.0 16.8 4.0 4.6 -3.8 -9.2 DAY 31 1 17 4 2 1 20 12 29 21 16 12 MAXIMUM AIR TEMPERATURE (C) 9.7 7.5 17.0 23.0 24.2 34.1 36.2 36.5 31.8 23.0 15.7 5.1 22.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 27 31 31 22 0 0 0 111 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 13.4 16.8 21.4 28.6 29.6 37.6 38.4 39.4 37.6 28.6 22.4 9.0 39.4 DAY 5 13 8 20 28 21 27 15 2 6 2 15 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 8.2 9.1 10.7 10.7 12.1 11.0 11.2 11.6 10.5 7.8 6.1 9.8 MEAN DAILY TEMP. (MDT) (C) 5.4 3.4 12.4 17.7 18.8 28.1 30.7 30.9 26.0 17.8 11.8 2.1 17.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 3.2 14.3 211.9 300.4 307.1 149.9 7.1 0.0 0.0 993.9 HEATING DEG. DAYS(BASE 18 0C) 390.1 423.5 173.1 36.6 27.4 0.0 0.0 0.0 0.0 50.0 186.1 493.7 1780.4 DEWPOINT (MEAN C) -1.7 -4.6 -0.2 0.4 4.1 8.2 9.9 9.5 5.9 2.0 2.9 -3.9 2.7 MIXING RATIO (G/KG) 3.92 3.24 4.48 4.74 6.05 7.99 8.87 8.76 6.83 5.19 5.43 3.32 5.74 VAPOUR PRESSURE (HPA) 5.51 4.58 6.27 6.63 8.44 11.09 12.30 12.12 9.54 7.30 7.64 4.70 8.01 SATURATION DEF. (HPA) 3.24 3.30 8.00 14.00 13.85 28.15 32.93 32.93 24.43 13.06 6.06 2.20 15.18 RELATIVE HUMIDITY (MEAN %) 66 61 47 34 41 30 28 28 29 38 59 69 44 RELATIVE HUMIDITY (MAX. %) 78 79 66 50 61 40 36 38 37 48 73 81 57 RELATIVE HUMIDITY (MIN. %) 51 43 32 22 27 22 22 21 23 28 44 56 33 RELATIVE HUMIDITY (MEAN% 03UTC) 70 71 56 46 55 37 34 35 34 42 65 73 52 RELATIVE HUMIDITY (MEAN% 09UTC) 57 49 39 27 32 27 25 25 26 31 49 62 37 RELATIVE HUMIDITY (MEAN% 15UTC) 65 59 40 28 33 25 26 25 29 40 61 72 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 25.2 30.7 61.0 23.0 34.8 0.0 0.0 0.0 0.0 6.0 65.3 68.2 314.2 DAYS WITH PRECIPITATION >=10 1 2 2 0 0 0 0 0 0 0 3 3 11 DAYS WITH PRECIPITATION >= 5 1 3 4 2 3 0 0 0 0 1 4 4 22 DAYS WITH PRECIPITATION >= 1 4 5 7 5 10 0 0 0 0 1 10 9 51 DAYS WITH PRECIPITATION 10 8 12 7 13 0 0 0 0 3 13 11 77 GREATEST DAILY PRECIPITATION 17.0 12.2 26.0 7.2 7.0 0.0 0.0 0.0 0.0 6.0 15.4 24.0 26.0 DAY 29 5 26 24 10 ** ** ** ** 19 30 3 DAY WITH THUNDER STORM 0 1 1 3 7 1 0 0 0 2 0 0 15 DAYS WITH SNOW OR SLEET 2 7 1 0 0 0 0 0 0 0 0 7 17 DAYS WITH DUST 0 0 0 3 4 0 0 0 0 2 0 0 9 WIND DIRECTION (PREVAILING) 45 45 45 45 45 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 6.0 5.8 7.6 7.0 7.4 6.7 7.2 5.9 6.2 6.3 6.6 5.7 6.6 PREVAILING WIND PERCENT 13.0 12.9 16.9 17.5 20.2 20.0 26.6 20.6 23.3 22.2 17.5 5.2 18.0 CALMS PERCENT OF WIND 74.4 65.5 51.2 40.8 38.7 42.5 45.6 46.8 55.0 58.5 64.6 79.8 55.3 NO. OF WIND OBSERVATION 246 232 248 240 248 240 248 248 240 248 240 248 2926 VECTOR WIND DIRECTION (MEAN) 58 63 324 274 318 178 65 170 81 32 50 127 30 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.3 0.3 1.2 1.3 0.6 1.2 0.2 0.4 0.6 0.7 0.4 0.2 WIND STEADINESES (MEAN %) 29.4 12.5 7.3 25.0 24.1 15.8 31.6 6.3 14.3 22.2 30.4 33.3 6.3 WIND SPEED (MEAN KNOTS) 1.7 2.4 4.1 4.8 5.4 3.8 3.8 3.2 2.8 2.7 2.3 1.2 3.2 FASTEST WIND DIRECTION 280 270 330 210 30 180 330 50 180 310 260 250 210 FASTEST WIND SPEED (KNOTS) 19 21 29 43 39 19 29 16 16 29 21 19 43 DAY 2 14 20 12 5 1 20 11 12 19 26 14 DAYS WITH SKY CLEAR (0-2)/8 12 11 5 14 12 28 24 29 28 23 9 12 207 DAYS WITH P.CLOUDY (3-6)/8 11 6 14 11 12 2 7 2 2 6 10 7 90 DAYS WITH CLOUDY (7-8)/8 8 12 12 5 7 0 0 0 0 2 11 12 69 DAYS WITH VISIBILITY =< 2 KM 4 5 2 0 0 1 0 0 0 0 3 9 24 DURATION OF SUNSHINE HOURS 135.8 130.6 95.7 233.5 226.4 325.7 315.2 298.3 285.1 225.6 119.0 104.8 2495.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 881.1 883.5 877.8 877.1 876.6 874.5 874.6 872.8 879.1 883.3 882.4 884.6 878.9 MAX. QFE PRESSURE IN HPA 890.0 891.5 885.8 883.9 882.8 881.0 879.3 877.1 884.2 891.7 891.8 891.7 891.8 DAY-HOUR 4-18 18- 6 4- 6 14- 6 17- 3 29- 6 23- 6 30- 6 22- 6 21-21 27- 6 19- 6 MIN. QFE PRESSURE IN HPA 873.4 872.2 865.6 870.9 868.4 867.1 870.1 868.2 872.5 873.1 874.9 875.3 865.6 DAY-HOUR 29-12 8-12 12-12 9-15 28-15 20-15 15-15 8-15 8-15 19- 3 12- 0 14-12 MEAN QNH PRESSURE IN HPA 1018.5 1021.2 1014.8 1014.0 1013.4 1011.1 1011.2 1009.2 1016.3 1021.0 1020.0 1022.5 1016.1 MAX. QNH PRESSURE IN HPA 1028.5 1030.2 1023.8 1021.7 1020.4 1018.4 1016.5 1014.0 1022.0 1030.4 1030.5 1030.4 1030.5 DAY-HOUR 4-18 18- 6 4- 6 14- 6 17- 3 29- 6 23- 6 30- 6 22- 6 21-21 27- 6 19- 6 MIN. QNH PRESSURE IN HPA 1009.8 1008.5 1001.1 1007.0 1004.2 1002.8 1006.1 1004.0 1008.8 1009.5 1011.5 1012.0 1001.1 DAY-HOUR 29-12 8-12 12-12 9-15 28-15 20-15 15-15 8-15 8-15 19- 3 12- 0 14-12 MEAN QFF PRESSURE IN HPA 1019.8 1023.6 1012.3 1008.6 1007.4 1000.5 999.3 997.4 1006.9 1015.9 1017.7 1025.5 1011.2 MAX. QFF PRESSURE IN HPA 1029.8 1034.1 1021.5 1016.3 1015.7 1007.9 1005.1 1003.8 1014.4 1029.5 1028.2 1033.7 1034.1 DAY-HOUR 4-15 18- 6 1- 6 14- 6 13- 6 29- 6 22- 6 30- 6 26- 3 21- 6 27- 6 19- 6 MIN. QFF PRESSURE IN HPA 1010.6 1009.4 996.3 1000.0 995.8 990.8 994.1 990.8 999.0 1003.5 1009.0 1013.0 990.8 DAY-HOUR 9-12 14- 0 12-12 9-18 28-18 21-15 16-12 15-12 1-12 19- 3 12- 0 14-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 881.0 883.2 877.7 877.0 876.5 874.4 874.5 872.8 878.9 883.2 882.1 884.5 878.8 MAX. QFE PRESSURE IN HPA 889.4 889.8 884.5 882.5 881.7 878.2 878.0 875.3 883.0 890.9 888.7 890.1 890.9 DAY 5 19 29 14 17 5 23 30 26 22 27 19 MIN. QFE PRESSURE IN HPA 875.0 874.6 868.6 872.0 869.5 867.7 871.0 869.8 873.9 874.1 874.9 877.0 867.7 DAY 17 8 15 10 29 21 16 9 1 19 12 7 MEAN QNH PRESSURE IN HPA 1018.4 1020.9 1014.7 1013.9 1013.3 1011.0 1011.1 1009.2 1016.0 1020.9 1019.6 1022.3 1016.0 MAX. QNH PRESSURE IN HPA 1027.8 1028.3 1022.3 1020.1 1019.2 1015.3 1015.0 1012.0 1020.6 1029.5 1027.1 1028.6 1029.5 DAY 5 19 29 14 17 5 23 30 26 22 27 19 MIN. QNH PRESSURE IN HPA 1011.6 1011.2 1004.4 1008.3 1005.5 1003.4 1007.2 1005.8 1010.4 1010.6 1011.5 1013.9 1003.4 DAY 17 8 15 10 29 21 16 9 1 19 12 7 MEAN QFF PRESSURE IN HPA 1019.3 1023.0 1011.8 1008.4 1007.1 1000.4 999.2 997.1 1006.3 1015.5 1016.9 1025.1 1010.8 MAX. QFF PRESSURE IN HPA 1028.0 1031.7 1019.2 1014.9 1013.1 1005.1 1003.4 1001.1 1012.4 1027.6 1024.6 1030.7 1031.7 DAY 5 19 2 14 14 4 23 30 27 22 27 19 MIN. QFF PRESSURE IN HPA 1012.1 1009.4 1003.0 1001.4 996.9 991.4 994.3 992.5 999.0 1004.3 1009.0 1015.7 991.4 DAY 17 14 14 10 29 21 16 16 2 19 12 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 881.0 883.4 878.0 877.6 877.0 875.4 875.5 873.5 879.7 883.6 882.4 884.5 879.3 MAX. QFE PRESSURE IN HPA 888.8 889.9 884.8 882.9 882.8 879.8 878.5 876.3 883.6 890.9 890.5 890.5 890.9 DAY 5 19 29 14 17 29 23 30 26 22 27 19 MIN. QFE PRESSURE IN HPA 873.9 874.4 868.4 873.1 869.7 868.1 871.8 870.0 874.7 873.1 875.5 876.4 868.1 DAY 29 8 15 10 29 21 16 16 8 19 12 7 MEAN QNH PRESSURE IN HPA 1018.5 1021.1 1015.1 1014.6 1013.9 1012.1 1012.2 1010.0 1016.9 1021.3 1020.0 1022.3 1016.5 MAX. QNH PRESSURE IN HPA 1027.2 1028.4 1022.7 1020.5 1020.4 1017.0 1015.6 1013.1 1021.3 1029.5 1029.1 1029.1 1029.5 DAY 5 19 29 14 17 29 23 30 26 22 27 19 MIN. QNH PRESSURE IN HPA 1010.4 1011.0 1004.2 1009.5 1005.7 1003.9 1008.1 1006.0 1011.3 1009.5 1012.2 1013.2 1003.9 DAY 29 8 15 10 29 21 16 16 8 19 12 7 MEAN QFF PRESSURE IN HPA 1020.2 1024.0 1012.9 1009.9 1008.4 1001.9 1000.9 998.7 1008.4 1017.2 1018.3 1025.9 1012.2 MAX. QFF PRESSURE IN HPA 1028.9 1032.8 1020.3 1016.1 1015.2 1006.7 1004.9 1003.2 1014.4 1029.2 1028.0 1032.5 1032.8 DAY 5 19 28 14 17 29 23 30 26 22 27 19 MIN. QFF PRESSURE IN HPA 1012.1 1010.1 1003.9 1003.1 997.1 992.6 995.9 993.7 1002.0 1003.5 1010.4 1015.2 992.6 DAY 29 14 12 10 29 21 16 16 1 19 12 7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 882.2 884.7 879.0 878.4 877.7 876.0 876.2 874.5 880.5 884.5 883.5 885.7 880.2 MAX. QFE PRESSURE IN HPA 889.5 891.5 885.8 883.9 882.8 881.0 879.3 877.1 884.2 891.4 891.8 891.7 891.8 DAY 4 18 4 14 17 29 23 30 22 22 27 19 MIN. QFE PRESSURE IN HPA 874.4 874.8 869.6 874.3 869.8 869.1 872.3 871.0 875.4 873.9 876.1 877.4 869.1 DAY 29 8 15 25 29 21 16 15 8 19 12 7 MEAN QNH PRESSURE IN HPA 1019.8 1022.5 1016.2 1015.4 1014.7 1012.8 1013.0 1011.1 1017.9 1022.3 1021.2 1023.7 1017.5 MAX. QNH PRESSURE IN HPA 1028.0 1030.2 1023.8 1021.7 1020.4 1018.4 1016.5 1014.0 1022.0 1030.1 1030.5 1030.4 1030.5 DAY 4 18 4 14 17 29 23 30 22 22 27 19 MIN. QNH PRESSURE IN HPA 1011.0 1011.4 1005.6 1010.9 1005.8 1005.0 1008.6 1007.2 1012.1 1010.4 1012.9 1014.4 1005.0 DAY 29 8 15 25 29 21 16 15 8 19 12 7 MEAN QFF PRESSURE IN HPA 1021.5 1025.2 1013.8 1010.0 1008.5 1002.3 1001.2 999.2 1008.5 1017.1 1019.0 1027.0 1012.8 MAX. QFF PRESSURE IN HPA 1029.2 1034.1 1021.5 1016.3 1015.7 1007.9 1005.1 1003.8 1013.9 1029.5 1028.2 1033.7 1034.1 DAY 4 18 1 14 13 29 22 30 26 21 27 19 MIN. QFF PRESSURE IN HPA 1012.8 1013.3 1003.8 1003.8 996.4 993.0 995.9 994.2 1002.0 1004.4 1010.8 1016.5 993.0 DAY 29 14 12 10 29 21 16 15 1 19 12 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.3 884.0 878.4 877.6 877.0 875.3 875.3 873.6 879.8 883.6 882.5 884.7 879.4 MAX. QFE PRESSURE IN HPA 889.1 891.1 885.2 883.6 882.2 879.9 878.2 876.3 884.0 890.8 890.9 891.3 891.3 DAY 4 18 28 14 12 29 23 30 22 21 27 18 MIN. QFE PRESSURE IN HPA 874.2 873.3 868.9 873.8 869.7 868.4 871.7 870.5 874.5 874.4 875.9 876.0 868.4 DAY 29 8 12 17 29 21 16 15 8 19 12 14 MEAN QNH PRESSURE IN HPA 1018.8 1021.7 1015.4 1014.6 1013.9 1012.0 1012.0 1010.1 1017.1 1021.3 1020.1 1022.5 1016.6 MAX. QNH PRESSURE IN HPA 1027.5 1029.8 1023.1 1021.3 1019.7 1017.2 1015.3 1013.1 1021.8 1029.4 1029.5 1030.0 1030.0 DAY 4 18 28 14 12 29 23 30 22 21 27 18 MIN. QNH PRESSURE IN HPA 1010.7 1009.7 1004.8 1010.3 1005.7 1004.2 1007.9 1006.6 1011.1 1011.0 1012.7 1012.8 1004.2 DAY 29 8 12 17 29 21 16 15 8 19 12 14 MEAN QFF PRESSURE IN HPA 1019.5 1023.8 1012.6 1008.8 1007.5 1001.2 999.8 998.0 1007.2 1015.7 1017.4 1025.1 1011.4 MAX. QFF PRESSURE IN HPA 1027.6 1033.3 1020.3 1015.6 1014.1 1006.3 1003.7 1002.5 1012.7 1028.0 1026.8 1032.2 1033.3 DAY 4 18 28 14 13 29 22 30 22 21 27 18 MIN. QFF PRESSURE IN HPA 1013.6 1012.4 1000.4 1003.1 997.0 991.9 994.8 993.2 1000.6 1005.2 1010.4 1014.0 991.9 DAY 29 8 12 17 29 21 16 15 1 19 12 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.2 882.6 876.9 876.2 875.7 873.8 873.6 871.9 878.2 882.4 881.6 883.8 878.1 MAX. QFE PRESSURE IN HPA 888.4 889.9 883.7 881.4 881.2 877.6 876.9 874.1 882.3 890.4 888.9 890.2 890.4 DAY 4 18 28 14 13 4 22 20 22 21 27 18 MIN. QFE PRESSURE IN HPA 873.4 872.2 865.6 871.9 868.9 867.7 870.7 868.6 873.1 873.8 875.4 875.3 865.6 DAY 29 8 12 17 29 21 16 15 8 17 12 14 MEAN QNH PRESSURE IN HPA 1017.5 1020.2 1013.8 1013.0 1012.4 1010.3 1010.1 1008.2 1015.2 1019.9 1019.1 1021.5 1015.1 MAX. QNH PRESSURE IN HPA 1026.7 1028.4 1021.4 1018.8 1018.6 1014.6 1013.8 1010.6 1019.9 1029.0 1027.3 1028.7 1029.0 DAY 4 18 28 14 13 4 22 20 22 21 27 18 MIN. QNH PRESSURE IN HPA 1009.8 1008.5 1001.1 1008.2 1004.8 1003.4 1006.8 1004.4 1009.5 1010.3 1012.1 1012.0 1001.1 DAY 29 8 12 17 29 21 16 15 8 17 12 14 MEAN QFF PRESSURE IN HPA 1018.4 1022.2 1010.9 1007.4 1006.2 999.5 998.0 996.0 1005.4 1014.4 1016.6 1024.2 1009.9 MAX. QFF PRESSURE IN HPA 1026.9 1031.7 1018.7 1013.3 1014.2 1004.2 1002.1 999.7 1011.2 1027.5 1024.7 1030.8 1031.7 DAY 4 18 28 13 13 4 22 30 26 21 27 18 MIN. QFF PRESSURE IN HPA 1010.6 1010.4 996.3 1001.3 996.3 990.9 994.1 990.8 999.0 1003.9 1009.6 1013.0 990.8 DAY 9 13 12 9 29 21 16 15 1 17 12 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 880.7 882.9 877.0 875.9 875.8 873.2 873.3 871.4 877.9 882.6 882.2 884.4 878.1 MAX. QFE PRESSURE IN HPA 889.5 889.7 883.7 880.8 880.7 877.1 877.0 873.9 882.2 890.5 889.4 891.1 891.1 DAY 4 18 28 13 12 4 22 20 30 21 27 18 MIN. QFE PRESSURE IN HPA 874.2 872.6 866.1 870.9 868.4 867.1 870.1 868.2 872.5 873.8 876.0 877.9 866.1 DAY 29 8 12 9 28 20 15 8 8 17 12 14 MEAN QNH PRESSURE IN HPA 1018.0 1020.5 1013.9 1012.6 1012.5 1009.6 1009.7 1007.6 1014.9 1020.2 1019.8 1022.2 1015.1 MAX. QNH PRESSURE IN HPA 1028.0 1028.2 1021.4 1018.2 1018.1 1014.0 1013.9 1010.4 1019.7 1029.1 1027.8 1029.8 1029.8 DAY 4 18 28 13 12 4 22 20 30 21 27 18 MIN. QNH PRESSURE IN HPA 1010.7 1008.9 1001.6 1007.0 1004.2 1002.8 1006.1 1004.0 1008.8 1010.3 1012.8 1014.9 1001.6 DAY 29 8 12 9 28 20 15 8 8 17 12 14 MEAN QFF PRESSURE IN HPA 1019.8 1023.2 1011.6 1007.8 1006.9 999.2 998.2 996.2 1006.2 1016.0 1018.1 1025.8 1010.8 MAX. QFF PRESSURE IN HPA 1029.8 1032.2 1019.4 1014.6 1013.5 1003.8 1003.2 999.9 1012.8 1029.2 1027.0 1033.3 1033.3 DAY 4 18 28 13 12 1 22 30 30 21 27 18 MIN. QFF PRESSURE IN HPA 1012.7 1010.8 997.6 1000.1 995.8 990.8 994.4 991.9 999.9 1004.3 1010.9 1016.7 990.8 DAY 28 13 12 9 28 21 15 8 1 17 12 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 881.3 883.6 878.0 876.9 876.6 873.9 874.0 872.4 878.9 883.4 882.6 884.9 878.9 MAX. QFE PRESSURE IN HPA 890.0 890.4 884.7 881.5 882.5 877.7 877.8 875.2 883.0 891.1 888.7 891.4 891.4 DAY 4 18 28 13 17 29 22 19 30 21 27 18 MIN. QFE PRESSURE IN HPA 875.2 874.3 869.3 871.5 869.1 867.6 870.7 869.1 873.7 874.2 876.5 878.6 867.6 DAY 29 8 15 9 28 21 15 15 8 17 12 6 MEAN QNH PRESSURE IN HPA 1018.8 1021.3 1015.0 1013.7 1013.5 1010.4 1010.5 1008.7 1016.0 1021.1 1020.2 1022.7 1016.0 MAX. QNH PRESSURE IN HPA 1028.5 1029.0 1022.6 1019.0 1020.1 1014.7 1014.8 1011.9 1020.6 1029.8 1027.1 1030.1 1030.1 DAY 4 18 28 13 17 29 22 19 30 21 27 18 MIN. QNH PRESSURE IN HPA 1011.9 1010.9 1005.2 1007.7 1005.0 1003.3 1006.8 1005.0 1010.2 1010.7 1013.3 1015.7 1003.3 DAY 29 8 15 9 28 21 15 15 8 17 12 6 MEAN QFF PRESSURE IN HPA 1020.4 1023.8 1012.6 1008.3 1007.4 999.9 998.7 996.9 1006.7 1016.0 1018.0 1026.1 1011.2 MAX. QFF PRESSURE IN HPA 1029.6 1033.3 1020.2 1014.5 1015.2 1005.6 1003.4 1000.2 1012.8 1028.7 1026.0 1033.2 1033.3 DAY 4 18 1 13 17 1 22 19 30 21 30 18 MIN. QFF PRESSURE IN HPA 1012.1 1011.5 1001.6 1000.0 995.8 991.2 994.2 992.3 999.9 1004.4 1011.1 1017.6 991.2 DAY 28 13 12 9 28 21 15 15 1 17 13 6 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 881.0 883.7 878.0 877.1 876.6 874.2 874.3 872.5 879.1 883.3 882.4 884.6 878.9 MAX. QFE PRESSURE IN HPA 890.0 890.4 884.5 881.8 881.2 877.8 877.8 875.2 883.3 891.7 888.4 891.4 891.7 DAY 4 18 28 13 17 4 22 19 26 21 27 18 MIN. QFE PRESSURE IN HPA 875.4 874.3 868.8 872.1 869.6 867.8 870.8 869.1 873.7 874.2 876.5 877.4 867.8 DAY 29 8 15 9 29 20 15 15 1 17 12 6 MEAN QNH PRESSURE IN HPA 1018.4 1021.4 1015.0 1014.0 1013.4 1010.7 1010.9 1008.9 1016.2 1021.0 1020.0 1022.5 1016.0 MAX. QNH PRESSURE IN HPA 1028.5 1029.0 1022.3 1019.3 1018.6 1014.8 1014.8 1011.9 1021.0 1030.4 1026.7 1030.1 1030.4 DAY 4 18 28 13 17 4 22 19 26 21 27 18 MIN. QNH PRESSURE IN HPA 1012.1 1010.9 1004.7 1008.4 1005.6 1003.5 1006.9 1005.0 1010.2 1010.7 1013.3 1014.4 1003.5 DAY 29 8 15 9 29 20 15 15 1 17 12 6 MEAN QFF PRESSURE IN HPA 1019.3 1023.4 1012.1 1008.1 1007.0 1000.0 998.8 996.8 1006.6 1015.5 1017.3 1025.2 1010.8 MAX. QFF PRESSURE IN HPA 1028.6 1032.8 1019.5 1014.3 1012.9 1005.4 1003.3 1000.0 1012.8 1028.5 1025.6 1032.4 1032.8 DAY 4 18 3 13 17 1 22 30 30 21 30 18 MIN. QFF PRESSURE IN HPA 1011.9 1011.0 1002.5 1001.0 996.8 991.5 994.2 991.6 999.1 1004.4 1010.7 1016.0 991.5 DAY 28 13 12 9 29 21 15 15 1 17 11 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.8 6.3 8.5 18.1 23.8 29.6 31.1 27.7 26.5 18.1 12.7 6.4 17.7 MINIMUN AIR TEMPERATURE (C) 0.0 2.0 3.9 12.8 17.8 23.1 24.8 22.4 20.6 13.0 9.0 3.2 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 24 30 24 11 0 0 0 93 DAYS WITH MINIMUM TEMP. <=-4 7 3 5 0 0 0 0 0 0 0 0 0 15 DAYS WITH FREEZING MIN.<= 0 14 7 12 0 0 0 0 0 0 0 0 5 38 TEMPERATURE RECORDS LOWEST(C) -7.6 -5.8 -6.8 7.4 11.0 17.6 18.0 18.0 16.4 6.4 5.2 -1.2 -7.6 DAY 5 7 11 7 5 10 29 28 20 31 21 6 MAXIMUM AIR TEMPERATURE (C) 8.6 11.7 13.6 23.6 29.4 35.3 36.9 33.1 32.7 24.1 17.8 10.9 23.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 12 28 31 28 27 1 0 0 128 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 14.0 19.8 23.0 30.0 36.4 40.2 39.4 36.6 36.0 30.8 23.0 16.6 40.2 DAY 30 14 18 21 28 27 7 6 3 1 9 2 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 9.7 9.7 10.8 11.6 12.2 12.1 10.7 12.1 11.1 8.8 7.7 10.5 MEAN DAILY TEMP. (MDT) (C) 4.3 6.9 8.8 18.2 23.6 29.2 30.9 27.7 26.6 18.5 13.4 7.1 17.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 14.2 88.9 246.9 306.2 208.2 169.5 6.8 0.0 0.0 1040.8 HEATING DEG. DAYS(BASE 18 0C) 423.9 312.1 286.6 35.9 0.0 0.0 0.0 0.0 0.0 27.9 138.0 339.3 1563.7 DEWPOINT (MEAN C) -0.8 -5.4 -3.3 1.2 2.6 6.2 11.3 8.5 5.1 2.4 3.1 -1.1 2.5 MIXING RATIO (G/KG) 4.28 3.10 3.66 4.93 5.43 6.99 9.85 8.13 6.44 5.40 5.54 4.14 5.66 VAPOUR PRESSURE (HPA) 6.01 4.34 5.14 6.89 7.59 9.70 13.61 11.32 9.00 7.58 7.80 5.82 7.90 SATURATION DEF. (HPA) 2.39 5.64 7.18 14.60 22.91 33.00 32.68 26.63 26.52 13.93 7.30 4.00 16.40 RELATIVE HUMIDITY (MEAN %) 73 46 47 35 27 24 31 32 26 37 55 61 41 RELATIVE HUMIDITY (MAX. %) 85 64 63 49 38 33 43 43 34 48 67 78 54 RELATIVE HUMIDITY (MIN. %) 59 30 31 22 18 17 23 23 20 27 41 46 30 RELATIVE HUMIDITY (MEAN% 03UTC) 77 55 56 43 35 29 40 42 32 44 59 66 48 RELATIVE HUMIDITY (MEAN% 09UTC) 63 37 42 28 22 21 27 28 22 30 47 54 35 RELATIVE HUMIDITY (MEAN% 15UTC) 73 41 39 30 22 20 25 27 28 37 58 61 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.7 15.4 36.0 5.4 0.0 0.0 0.0 0.0 0.0 0.0 36.4 54.2 211.1 DAYS WITH PRECIPITATION >=10 2 0 1 0 0 0 0 0 0 0 2 2 7 DAYS WITH PRECIPITATION >= 5 4 1 3 0 0 0 0 0 0 0 2 3 13 DAYS WITH PRECIPITATION >= 1 10 4 6 1 0 0 0 0 0 0 4 9 34 DAYS WITH PRECIPITATION 13 7 10 7 3 0 0 1 0 3 6 14 64 GREATEST DAILY PRECIPITATION 25.0 7.0 17.0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 17.0 20.0 25.0 DAY 2 26 8 7 ** ** ** ** ** ** 13 18 DAY WITH THUNDER STORM 0 0 0 1 0 1 0 2 0 0 2 0 6 DAYS WITH SNOW OR SLEET 2 0 5 0 0 0 0 0 0 0 0 1 8 DAYS WITH DUST 0 1 0 1 2 3 0 0 0 0 0 2 9 WIND DIRECTION (PREVAILING) 45 270 45 270 45 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 8.6 11.6 8.6 10.8 6.7 7.6 6.1 6.7 5.8 5.6 6.1 6.8 6.5 PREVAILING WIND PERCENT 4.0 27.7 11.3 14.6 18.1 17.1 18.5 17.7 27.1 18.5 22.9 21.4 16.5 CALMS PERCENT OF WIND 87.1 44.6 54.0 47.5 43.1 45.0 52.4 54.0 50.8 63.3 67.1 60.9 56.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 68 267 278 258 260 123 127 177 55 311 48 55 290 VECTOR WIND MAGNITUDE(KNOTS) 0.4 3.1 0.4 1.9 0.7 0.7 0.1 0.3 0.7 0.4 1.1 1.5 0.2 WIND STEADINESES (MEAN %) 50.0 59.6 10.5 41.3 15.6 15.6 3.4 9.7 24.1 16.0 57.9 60.0 6.1 WIND SPEED (MEAN KNOTS) 0.8 5.2 3.8 4.6 4.5 4.5 2.9 3.1 2.9 2.5 1.9 2.5 3.3 FASTEST WIND DIRECTION 50 270 270 310 270 240 50 40 30 260 60 300 310 FASTEST WIND SPEED (KNOTS) 14 29 29 39 39 39 16 23 16 29 14 19 39 DAY 13 6 24 28 20 17 16 19 24 1 26 2 DAYS WITH SKY CLEAR (0-2)/8 16 17 10 15 19 27 27 29 30 25 11 10 236 DAYS WITH P.CLOUDY (3-6)/8 8 6 15 10 10 3 4 2 0 4 11 10 83 DAYS WITH CLOUDY (7-8)/8 7 5 6 5 2 0 0 0 0 2 8 11 46 DAYS WITH VISIBILITY =< 2 KM 11 0 2 0 0 0 0 0 0 0 0 0 13 DURATION OF SUNSHINE HOURS 132.6 161.5 170.9 237.5 323.9 329.9 322.7 329.3 305.2 249.4 154.0 127.2 2844.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 880.7 875.3 880.7 876.8 877.5 873.7 873.4 877.6 878.4 881.5 883.6 881.2 878.4 MAX. QFE PRESSURE IN HPA 886.6 883.8 892.6 888.1 886.8 880.2 878.4 883.6 886.4 889.8 890.0 889.6 892.6 DAY-HOUR 14- 6 24- 6 5- 6 17- 6 12- 6 10- 6 16- 6 13- 6 22- 6 31-21 1- 6 9- 6 MIN. QFE PRESSURE IN HPA 871.9 863.3 867.7 871.9 871.6 867.7 866.9 871.7 871.6 873.0 878.0 866.8 863.3 DAY-HOUR 2-12 26-12 24-12 24- 0 1-12 20-15 26-15 8-12 6-15 10-12 7-12 19- 0 MEAN QNH PRESSURE IN HPA 1018.0 1011.9 1018.1 1013.7 1014.4 1010.2 1009.8 1014.5 1015.5 1018.9 1021.4 1018.6 1015.4 MAX. QNH PRESSURE IN HPA 1024.7 1021.5 1031.4 1026.4 1024.9 1017.5 1015.5 1021.3 1024.5 1028.3 1028.5 1028.1 1031.4 DAY-HOUR 14- 6 24- 6 5- 6 17- 6 12- 6 10- 6 16- 6 13- 6 22- 6 31-21 1- 6 9- 6 MIN. QNH PRESSURE IN HPA 1008.2 998.5 1003.4 1008.2 1007.8 1003.4 1002.5 1007.9 1007.8 1009.4 1015.0 1002.4 998.5 DAY-HOUR 2-12 26-12 24-12 24- 0 1-12 20-15 26-15 8-12 6-15 10-12 7-12 19- 0 MEAN QFF PRESSURE IN HPA 1019.7 1012.2 1017.5 1008.0 1006.1 999.0 997.7 1004.2 1005.8 1013.3 1018.4 1018.9 1010.1 MAX. QFF PRESSURE IN HPA 1028.4 1025.9 1035.9 1023.1 1017.6 1008.7 1003.9 1012.6 1016.0 1025.7 1026.7 1027.9 1035.9 DAY-HOUR 5- 6 24- 6 5- 6 17- 6 12- 6 10- 6 29- 6 12- 6 22- 6 31-18 1- 3 8-18 MIN. QFF PRESSURE IN HPA 1011.6 997.8 998.0 999.5 998.6 991.5 990.9 996.0 997.2 1002.4 1009.8 1002.6 990.9 DAY-HOUR 2-12 26-12 24-12 24- 0 31-15 20-15 26-18 8-12 7-12 10-12 7-12 19- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 880.7 875.3 880.4 876.8 877.7 873.8 873.2 877.7 878.4 881.2 883.6 881.0 878.3 MAX. QFE PRESSURE IN HPA 885.8 882.1 890.9 885.4 884.9 878.6 876.4 881.8 885.0 886.5 889.1 889.0 890.9 DAY 25 12 6 17 12 10 16 14 23 7 1 9 MIN. QFE PRESSURE IN HPA 876.2 866.6 868.8 871.9 873.1 869.4 868.7 873.8 872.7 874.3 879.9 866.8 866.6 DAY 17 6 24 24 2 21 27 8 7 11 11 19 MEAN QNH PRESSURE IN HPA 1018.0 1012.0 1017.7 1013.7 1014.7 1010.3 1009.6 1014.6 1015.4 1018.7 1021.4 1018.4 1015.4 MAX. QNH PRESSURE IN HPA 1023.8 1019.6 1029.5 1023.3 1022.8 1015.7 1013.2 1019.3 1022.9 1024.6 1027.5 1027.4 1029.5 DAY 25 12 6 17 12 10 16 14 23 7 1 9 MIN. QNH PRESSURE IN HPA 1013.0 1002.2 1004.7 1008.2 1009.5 1005.3 1004.6 1010.3 1009.1 1010.9 1017.2 1002.4 1002.2 DAY 17 6 24 24 2 21 27 8 7 11 11 19 MEAN QFF PRESSURE IN HPA 1019.3 1011.8 1016.9 1007.8 1006.2 999.0 997.3 1004.0 1005.4 1012.6 1018.1 1018.4 1009.7 MAX. QFF PRESSURE IN HPA 1025.3 1022.6 1034.3 1018.6 1015.0 1006.7 1000.9 1009.8 1014.1 1018.6 1024.6 1027.1 1034.3 DAY 7 24 11 17 12 10 30 13 23 7 1 9 MIN. QFF PRESSURE IN HPA 1012.6 999.9 998.9 999.5 1000.7 993.2 992.3 998.4 997.9 1004.1 1012.4 1002.6 992.3 DAY 31 6 24 24 27 21 27 8 7 11 11 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 880.6 875.4 880.9 877.1 878.2 874.6 874.2 878.5 879.0 881.9 883.8 881.1 878.8 MAX. QFE PRESSURE IN HPA 885.5 883.1 891.2 886.7 886.0 879.6 877.6 882.5 885.2 886.8 889.3 888.7 891.2 DAY 25 12 5 17 12 10 16 13 22 7 1 9 MIN. QFE PRESSURE IN HPA 875.4 866.0 867.9 872.2 873.7 870.6 870.1 874.3 873.3 875.0 878.1 867.1 866.0 DAY 2 6 24 24 2 21 26 8 7 11 11 19 MEAN QNH PRESSURE IN HPA 1018.0 1012.1 1018.3 1014.0 1015.3 1011.2 1010.8 1015.6 1016.1 1019.4 1021.5 1018.5 1015.9 MAX. QNH PRESSURE IN HPA 1023.5 1020.8 1029.9 1024.8 1024.0 1016.8 1014.6 1020.1 1023.1 1024.9 1027.7 1027.1 1029.9 DAY 25 12 5 17 12 10 16 13 22 7 1 9 MIN. QNH PRESSURE IN HPA 1012.1 1001.5 1003.7 1008.5 1010.2 1006.7 1006.1 1010.9 1009.7 1011.6 1015.1 1002.8 1001.5 DAY 2 6 24 24 2 21 26 8 7 11 11 19 MEAN QFF PRESSURE IN HPA 1020.3 1012.9 1018.3 1009.0 1007.5 1000.4 999.2 1005.8 1007.5 1014.6 1019.4 1019.3 1011.2 MAX. QFF PRESSURE IN HPA 1026.8 1024.2 1035.0 1021.2 1017.0 1008.1 1003.6 1011.2 1015.6 1020.3 1026.7 1027.9 1035.0 DAY 4 24 11 17 12 10 29 13 23 7 1 9 MIN. QFF PRESSURE IN HPA 1013.4 1000.6 998.8 1000.4 1002.6 995.3 994.5 999.8 1000.1 1006.2 1011.2 1002.7 994.5 DAY 22 6 24 24 2 21 26 8 7 11 11 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 881.6 876.2 882.1 878.0 878.8 875.2 875.0 879.2 880.0 883.0 884.8 882.2 879.7 MAX. QFE PRESSURE IN HPA 886.6 883.8 892.6 888.1 886.8 880.2 878.4 883.6 886.4 887.6 890.0 889.6 892.6 DAY 14 24 5 17 12 10 16 13 22 31 1 9 MIN. QFE PRESSURE IN HPA 876.1 867.2 868.9 875.7 874.0 871.3 870.8 874.6 874.2 876.6 879.2 868.5 867.2 DAY 2 6 24 3 1 21 26 8 7 11 11 19 MEAN QNH PRESSURE IN HPA 1019.1 1013.0 1019.6 1015.1 1015.9 1011.8 1011.6 1016.4 1017.3 1020.6 1022.6 1019.7 1016.9 MAX. QNH PRESSURE IN HPA 1024.7 1021.5 1031.4 1026.4 1024.9 1017.5 1015.5 1021.3 1024.5 1025.8 1028.5 1028.1 1031.4 DAY 14 24 5 17 12 10 16 13 22 31 1 9 MIN. QNH PRESSURE IN HPA 1012.9 1002.9 1004.8 1012.4 1010.5 1007.5 1006.9 1011.2 1010.7 1013.5 1016.4 1004.3 1002.9 DAY 2 6 24 3 1 21 26 8 7 11 11 19 MEAN QFF PRESSURE IN HPA 1021.3 1013.5 1019.3 1009.3 1007.6 1000.5 999.4 1006.1 1007.5 1014.8 1019.7 1020.2 1011.6 MAX. QFF PRESSURE IN HPA 1028.4 1025.9 1035.9 1023.1 1017.6 1008.7 1003.9 1012.6 1016.0 1023.2 1026.1 1027.8 1035.9 DAY 5 24 5 17 12 10 29 12 22 31 1 14 MIN. QFF PRESSURE IN HPA 1014.2 1002.2 1001.0 1004.5 1001.6 995.2 994.5 999.6 999.8 1007.2 1011.0 1003.6 994.5 DAY 31 6 24 24 27 21 26 8 7 11 11 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 880.7 875.4 881.5 877.4 877.9 874.3 874.2 878.3 879.2 881.8 883.9 881.3 878.8 MAX. QFE PRESSURE IN HPA 886.0 882.9 892.3 887.4 886.2 878.7 877.3 882.8 885.8 887.5 888.3 888.7 892.3 DAY 14 12 5 17 12 10 16 12 22 31 19 9 MIN. QFE PRESSURE IN HPA 873.6 866.0 868.0 874.7 872.4 870.4 869.5 873.6 873.3 875.8 879.4 868.0 866.0 DAY 2 26 24 3 1 20 26 8 7 10 11 19 MEAN QNH PRESSURE IN HPA 1018.0 1012.1 1018.9 1014.4 1014.9 1010.9 1010.8 1015.4 1016.3 1019.3 1021.6 1018.7 1016.0 MAX. QNH PRESSURE IN HPA 1024.0 1020.5 1031.1 1025.6 1024.2 1015.8 1014.2 1020.4 1023.8 1025.7 1026.6 1027.1 1031.1 DAY 14 12 5 17 12 10 16 12 22 31 19 9 MIN. QNH PRESSURE IN HPA 1010.1 1001.5 1003.8 1011.3 1008.7 1006.5 1005.5 1010.1 1009.7 1012.6 1016.6 1003.8 1001.5 DAY 2 26 24 3 1 20 26 8 7 10 11 19 MEAN QFF PRESSURE IN HPA 1019.3 1011.9 1018.0 1008.4 1006.2 999.5 998.4 1004.7 1006.1 1013.0 1018.2 1018.5 1010.2 MAX. QFF PRESSURE IN HPA 1025.5 1023.7 1035.2 1021.9 1016.8 1006.9 1003.5 1010.8 1015.0 1022.0 1023.8 1026.8 1035.2 DAY 4 24 5 17 12 10 29 12 22 31 19 14 MIN. QFF PRESSURE IN HPA 1013.6 1001.1 998.8 1003.5 1000.7 994.2 992.9 997.9 998.4 1005.4 1011.3 1002.7 992.9 DAY 2 26 24 23 27 20 26 8 7 10 11 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 879.8 874.3 880.0 875.9 876.4 872.8 872.6 876.5 877.5 880.4 882.7 880.4 877.4 MAX. QFE PRESSURE IN HPA 885.2 881.8 890.8 885.1 884.7 876.5 875.4 880.7 884.4 887.2 887.0 888.1 890.8 DAY 14 12 5 17 12 10 16 13 22 31 17 14 MIN. QFE PRESSURE IN HPA 871.9 863.3 867.7 872.3 871.6 868.8 867.7 871.7 872.1 873.0 878.0 868.5 863.3 DAY 2 26 24 15 1 20 26 8 7 10 7 19 MEAN QNH PRESSURE IN HPA 1017.1 1010.8 1017.3 1012.7 1013.2 1009.2 1008.9 1013.3 1014.5 1017.7 1020.3 1017.7 1014.4 MAX. QNH PRESSURE IN HPA 1023.1 1019.3 1029.4 1023.0 1022.6 1013.3 1012.1 1018.1 1022.2 1025.4 1025.1 1026.4 1029.4 DAY 14 12 5 17 12 10 16 13 22 31 17 14 MIN. QNH PRESSURE IN HPA 1008.2 998.5 1003.4 1008.6 1007.8 1004.7 1003.4 1007.9 1008.4 1009.4 1015.0 1004.3 998.5 DAY 2 26 24 15 1 20 26 8 7 10 7 19 MEAN QFF PRESSURE IN HPA 1018.2 1010.7 1016.4 1006.8 1004.7 997.9 996.5 1002.5 1004.3 1011.6 1016.9 1017.7 1008.7 MAX. QFF PRESSURE IN HPA 1025.5 1023.1 1033.1 1019.2 1015.1 1004.8 1001.3 1008.6 1013.1 1022.1 1022.8 1027.7 1033.1 DAY 4 24 5 17 12 10 29 30 22 31 19 14 MIN. QFF PRESSURE IN HPA 1011.6 997.8 998.0 1001.9 998.9 992.6 990.9 996.0 997.2 1002.4 1009.8 1003.8 990.9 DAY 2 26 24 15 27 20 26 8 7 10 7 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 880.4 874.7 880.0 875.9 876.2 872.2 872.0 876.0 877.2 880.5 883.2 881.0 877.4 MAX. QFE PRESSURE IN HPA 885.3 881.6 890.4 884.7 884.1 875.6 875.2 880.4 884.4 888.1 887.3 888.2 890.4 DAY 14 12 5 17 12 10 16 13 22 31 17 8 MIN. QFE PRESSURE IN HPA 872.9 866.1 869.2 872.4 871.6 867.7 866.9 871.8 871.6 873.3 879.0 870.3 866.1 DAY 2 26 24 3 1 20 26 8 6 10 7 19 MEAN QNH PRESSURE IN HPA 1017.7 1011.3 1017.3 1012.6 1013.0 1008.5 1008.2 1012.7 1014.1 1017.9 1020.8 1018.4 1014.4 MAX. QNH PRESSURE IN HPA 1023.2 1019.1 1029.0 1022.6 1021.9 1012.3 1011.9 1017.7 1022.2 1026.4 1025.5 1026.5 1029.0 DAY 14 12 5 17 12 10 16 13 22 31 17 8 MIN. QNH PRESSURE IN HPA 1009.3 1001.6 1005.1 1008.7 1007.8 1003.4 1002.5 1008.1 1007.8 1009.7 1016.2 1006.4 1001.6 DAY 2 26 24 3 1 20 26 8 6 10 7 19 MEAN QFF PRESSURE IN HPA 1019.9 1012.0 1017.1 1007.5 1005.1 997.6 996.6 1002.9 1005.3 1013.1 1018.6 1019.2 1009.6 MAX. QFF PRESSURE IN HPA 1027.4 1022.9 1032.9 1019.5 1015.1 1003.5 1001.4 1009.0 1014.5 1025.5 1023.9 1027.7 1032.9 DAY 4 24 11 17 12 10 29 30 22 31 19 14 MIN. QFF PRESSURE IN HPA 1012.5 1003.0 1001.1 1001.2 998.6 991.5 991.0 997.0 997.7 1003.2 1011.9 1006.2 991.0 DAY 31 16 24 23 31 20 26 8 6 10 7 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 880.9 875.5 880.7 876.7 877.2 873.2 872.8 877.1 878.1 881.5 883.7 881.4 878.2 MAX. QFE PRESSURE IN HPA 886.1 882.7 891.7 885.5 885.6 876.6 876.1 881.7 885.4 889.4 888.1 888.9 891.7 DAY 14 24 5 17 12 11 15 13 22 31 17 8 MIN. QFE PRESSURE IN HPA 874.7 867.7 869.8 872.1 872.8 869.2 867.4 873.0 872.3 873.7 879.6 869.5 867.4 DAY 2 26 24 3 3 20 26 7 6 10 10 18 MEAN QNH PRESSURE IN HPA 1018.3 1012.2 1018.1 1013.6 1014.1 1009.6 1009.2 1014.0 1015.1 1018.9 1021.4 1018.9 1015.3 MAX. QNH PRESSURE IN HPA 1024.1 1020.3 1030.4 1023.5 1023.6 1013.5 1012.9 1019.2 1023.3 1027.8 1026.4 1027.3 1030.4 DAY 14 24 5 17 12 11 15 13 22 31 17 8 MIN. QNH PRESSURE IN HPA 1011.3 1003.4 1005.8 1008.4 1009.2 1005.1 1003.1 1009.4 1008.6 1010.2 1016.8 1005.5 1003.1 DAY 2 26 24 3 3 20 26 7 6 10 10 18 MEAN QFF PRESSURE IN HPA 1020.3 1012.7 1017.6 1007.8 1005.8 998.4 997.2 1003.8 1005.5 1013.3 1018.5 1019.4 1010.0 MAX. QFF PRESSURE IN HPA 1028.1 1023.5 1034.4 1019.7 1016.4 1004.8 1001.3 1009.8 1015.0 1025.7 1023.3 1027.9 1034.4 DAY 6 24 5 17 12 11 29 12 22 31 17 8 MIN. QFF PRESSURE IN HPA 1012.5 1003.3 1002.0 1001.1 998.9 992.6 990.9 997.8 998.0 1003.3 1011.8 1005.8 990.9 DAY 31 16 24 23 31 20 26 7 6 10 10 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 880.8 875.5 880.4 876.8 877.6 873.5 873.1 877.5 878.3 881.7 883.7 881.3 878.3 MAX. QFE PRESSURE IN HPA 886.1 882.1 891.5 884.9 885.0 877.4 876.6 881.7 885.4 889.8 888.4 889.4 891.5 DAY 24 11 5 17 12 9 15 12 22 31 17 8 MIN. QFE PRESSURE IN HPA 875.5 868.4 869.8 872.0 873.2 869.3 868.0 873.1 872.7 874.3 879.7 867.7 867.7 DAY 2 16 24 3 21 20 26 7 6 10 10 18 MEAN QNH PRESSURE IN HPA 1018.1 1012.2 1017.7 1013.7 1014.6 1009.9 1009.5 1014.4 1015.3 1019.2 1021.4 1018.7 1015.4 MAX. QNH PRESSURE IN HPA 1024.1 1019.6 1030.2 1022.8 1022.9 1014.4 1013.5 1019.2 1023.3 1028.3 1026.7 1027.8 1030.2 DAY 24 11 5 17 12 9 15 12 22 31 17 8 MIN. QNH PRESSURE IN HPA 1012.2 1004.2 1005.8 1008.3 1009.6 1005.2 1003.8 1009.5 1009.1 1010.9 1016.9 1003.4 1003.4 DAY 2 16 24 3 21 20 26 7 6 10 10 18 MEAN QFF PRESSURE IN HPA 1019.3 1012.0 1016.7 1007.7 1005.8 998.6 997.3 1003.8 1005.3 1013.0 1018.0 1018.6 1009.7 MAX. QFF PRESSURE IN HPA 1026.0 1021.8 1034.1 1018.6 1015.2 1004.9 1001.4 1009.8 1014.6 1025.0 1023.7 1027.3 1034.1 DAY 4 23 10 17 12 9 31 12 22 31 20 8 MIN. QFF PRESSURE IN HPA 1012.1 1002.3 1000.8 999.8 999.0 992.6 991.6 997.5 997.8 1003.2 1011.6 1003.6 991.6 DAY 31 5 23 23 31 20 26 7 6 10 10 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.7 7.4 7.4 16.7 21.5 27.3 30.8 28.3 25.4 20.4 10.1 4.0 17.1 MINIMUN AIR TEMPERATURE (C) 0.9 2.6 2.9 11.4 15.6 20.6 24.7 22.0 18.9 15.0 6.2 -0.2 11.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 13 28 23 1 1 0 0 67 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 3 6 DAYS WITH FREEZING MIN.<= 0 9 3 6 0 0 0 0 0 0 0 0 19 37 TEMPERATURE RECORDS LOWEST(C) -5.4 -1.8 -2.4 7.0 8.0 17.6 20.4 18.6 13.6 11.0 1.0 -4.5 -5.4 DAY 21 3 17 21 5 4 22 31 30 18 21 14 MAXIMUM AIR TEMPERATURE (C) 11.4 12.5 12.0 21.8 26.6 32.8 35.8 33.9 31.7 26.5 14.9 8.9 22.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 7 27 31 29 28 3 0 0 125 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.2 20.0 20.0 25.6 32.0 38.4 38.0 38.4 34.4 31.0 25.5 14.0 38.4 DAY 10 26 1 16 25 30 10 16 24 2 2 22 DIF. BETWEEN (MAX.-MIN.) (C) 10.5 9.9 9.1 10.4 11.0 12.2 11.1 11.9 12.8 11.5 8.7 9.1 10.7 MEAN DAILY TEMP. (MDT) (C) 6.1 7.5 7.5 16.6 21.1 26.7 30.2 28.0 25.3 20.8 10.5 4.4 17.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 47.3 171.2 285.9 215.7 130.5 29.6 0.0 0.0 880.3 HEATING DEG. DAYS(BASE 18 0C) 367.8 292.7 325.7 49.5 17.6 0.0 0.0 0.0 0.0 3.5 227.5 422.0 1706.3 DEWPOINT (MEAN C) -4.3 -1.7 -0.3 4.9 5.3 8.3 12.9 13.2 3.6 4.6 1.4 -2.9 3.8 MIXING RATIO (G/KG) 3.24 3.93 4.37 6.35 6.52 8.12 10.96 11.13 5.79 6.18 4.95 3.68 6.27 VAPOUR PRESSURE (HPA) 4.57 5.51 6.13 8.87 9.10 11.25 15.15 15.41 8.13 8.69 6.96 5.19 8.75 SATURATION DEF. (HPA) 4.91 5.22 4.70 10.55 17.56 26.08 30.00 24.00 25.16 15.97 6.04 3.22 14.45 RELATIVE HUMIDITY (MEAN %) 51 56 62 49 38 32 34 41 26 37 57 64 46 RELATIVE HUMIDITY (MAX. %) 66 71 76 66 53 45 42 52 34 48 72 80 59 RELATIVE HUMIDITY (MIN. %) 34 43 48 35 27 22 28 33 18 27 43 46 34 RELATIVE HUMIDITY (MEAN% 03UTC) 58 64 70 60 45 40 39 48 31 45 63 72 53 RELATIVE HUMIDITY (MEAN% 09UTC) 41 49 56 43 31 28 34 38 21 30 48 52 39 RELATIVE HUMIDITY (MEAN% 15UTC) 48 52 60 42 34 26 32 37 25 40 62 66 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 9.0 29.1 74.6 83.0 60.8 0.0 0.0 1.0 0.0 2.9 49.4 33.7 343.5 DAYS WITH PRECIPITATION >=10 0 0 3 3 2 0 0 0 0 0 2 1 11 DAYS WITH PRECIPITATION >= 5 1 4 7 5 5 0 0 0 0 0 2 1 25 DAYS WITH PRECIPITATION >= 1 2 6 12 8 6 0 0 1 0 1 7 6 49 DAYS WITH PRECIPITATION 6 9 17 12 11 1 1 4 0 9 11 11 92 GREATEST DAILY PRECIPITATION 7.0 8.3 13.3 25.0 26.0 0.0 0.0 1.0 0.0 2.0 20.0 22.0 26.0 DAY 23 6 8 11 3 ** ** 5 ** 24 30 20 DAY WITH THUNDER STORM 0 0 1 6 5 2 0 4 0 4 1 0 23 DAYS WITH SNOW OR SLEET 2 3 7 0 0 0 0 0 0 0 0 5 17 DAYS WITH DUST 2 1 0 0 1 0 0 0 0 2 3 1 10 WIND DIRECTION (PREVAILING) 45 45 45 45 45 225 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 6.0 8.2 6.9 6.8 6.7 6.4 6.2 6.7 6.0 5.8 5.5 5.2 6.4 PREVAILING WIND PERCENT 17.7 17.4 14.1 21.7 19.8 17.5 22.2 23.0 27.1 28.2 17.9 10.1 19.7 CALMS PERCENT OF WIND 62.9 58.9 61.3 42.9 36.7 42.1 52.0 44.8 55.0 49.2 68.8 78.6 54.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 22 73 121 267 299 180 73 74 32 33 67 313 51 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.7 0.3 0.1 0.7 0.3 0.7 0.9 0.7 1.1 0.8 0.2 0.4 WIND STEADINESES (MEAN %) 16.0 24.1 11.5 2.4 14.3 7.3 24.1 24.3 24.1 30.6 44.4 15.4 12.9 WIND SPEED (MEAN KNOTS) 2.5 2.9 2.6 4.1 4.9 4.1 2.9 3.7 2.9 3.6 1.8 1.3 3.1 FASTEST WIND DIRECTION 300 270 300 340 270 330 280 310 250 320 120 260 270 FASTEST WIND SPEED (KNOTS) 19 19 16 23 58 17 19 31 16 23 19 17 58 DAY 11 7 2 3 22 9 18 22 17 3 5 28 DAYS WITH SKY CLEAR (0-2)/8 20 13 8 4 16 26 27 25 28 14 8 16 205 DAYS WITH P.CLOUDY (3-6)/8 7 6 9 18 10 3 4 6 2 16 11 8 100 DAYS WITH CLOUDY (7-8)/8 4 9 14 8 5 1 0 0 0 1 11 7 60 DAYS WITH VISIBILITY =< 2 KM 1 1 5 0 1 0 0 0 0 0 1 7 16 DURATION OF SUNSHINE HOURS 186.9 159.6 129.1 171.2 273.4 315.5 327.8 298.6 304.2 243.3 133.1 155.2 2697.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 881.2 878.8 879.5 878.8 878.0 873.3 875.9 877.6 881.1 883.0 882.3 882.3 879.3 MAX. QFE PRESSURE IN HPA 888.5 886.3 887.1 887.2 885.2 881.0 880.8 881.6 887.0 890.2 889.5 893.9 893.9 DAY-HOUR 24- 6 22- 6 27-21 5- 6 18- 6 2- 6 15- 6 31- 6 22- 6 15- 6 15-21 7- 0 MIN. QFE PRESSURE IN HPA 868.1 873.1 870.1 873.7 872.8 868.2 869.4 872.3 876.7 877.5 874.5 872.3 868.1 DAY-HOUR 19-21 16- 0 8- 0 11-15 11-15 17-15 20-15 6-15 29-12 1-15 7-12 30-15 MEAN QNH PRESSURE IN HPA 1018.6 1015.9 1016.7 1016.0 1015.0 1009.8 1012.7 1014.6 1018.5 1020.6 1019.8 1019.8 1016.5 MAX. QNH PRESSURE IN HPA 1026.8 1024.4 1025.3 1025.4 1023.1 1018.4 1018.2 1019.1 1025.1 1028.7 1028.0 1032.9 1032.9 DAY-HOUR 24- 6 22- 6 27-21 5- 6 18- 6 2- 6 15- 6 31- 6 22- 6 15- 6 15-21 7- 0 MIN. QNH PRESSURE IN HPA 1003.9 1009.5 1006.1 1010.2 1009.2 1004.0 1005.3 1008.6 1013.6 1014.5 1011.1 1008.6 1003.9 DAY-HOUR 19-21 16- 0 8- 0 11-15 11-15 17-15 20-15 6-15 29-12 1-15 7-12 30-15 MEAN QFF PRESSURE IN HPA 1019.4 1015.7 1016.5 1010.9 1007.6 999.5 1000.7 1003.7 1009.4 1013.9 1018.2 1021.5 1011.4 MAX. QFF PRESSURE IN HPA 1031.4 1023.5 1026.7 1022.0 1016.4 1009.1 1006.9 1010.1 1015.7 1022.6 1027.8 1035.2 1035.2 DAY-HOUR 24- 6 13- 9 16-18 5- 6 18- 6 3- 3 22- 6 31- 6 22- 6 15- 3 16- 3 7- 3 MIN. QFF PRESSURE IN HPA 1002.5 1007.0 1002.2 1004.3 1000.3 993.1 992.7 998.3 1004.0 1006.6 1006.7 1007.0 992.7 DAY-HOUR 19-21 25-12 8- 0 30-12 31- 0 28-15 20-15 15-12 29-12 1-12 7-12 30-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 881.3 878.4 879.1 878.4 877.6 873.4 875.6 877.6 881.0 882.8 882.1 882.1 879.1 MAX. QFE PRESSURE IN HPA 888.0 883.1 886.4 883.0 884.0 879.6 878.8 880.9 884.7 888.4 888.9 893.9 893.9 DAY 24 23 28 5 20 3 15 25 23 15 16 7 MIN. QFE PRESSURE IN HPA 868.1 873.1 870.1 874.4 873.9 869.1 871.5 873.7 878.0 879.1 875.2 874.2 868.1 DAY 20 16 8 12 3 18 21 15 15 1 8 31 MEAN QNH PRESSURE IN HPA 1018.7 1015.5 1016.2 1015.5 1014.5 1009.8 1012.4 1014.6 1018.4 1020.4 1019.7 1019.6 1016.3 MAX. QNH PRESSURE IN HPA 1026.3 1020.8 1024.5 1020.6 1021.8 1016.8 1015.9 1018.3 1022.6 1026.7 1027.3 1032.9 1032.9 DAY 24 23 28 5 20 3 15 25 23 15 16 7 MIN. QNH PRESSURE IN HPA 1003.9 1009.5 1006.1 1011.0 1010.4 1005.0 1007.7 1010.2 1015.0 1016.3 1011.9 1010.7 1003.9 DAY 20 16 8 12 3 18 21 15 15 1 8 31 MEAN QFF PRESSURE IN HPA 1019.0 1015.1 1015.7 1010.5 1007.1 999.6 1000.4 1003.5 1009.0 1013.4 1017.6 1020.8 1011.0 MAX. QFF PRESSURE IN HPA 1029.9 1020.2 1026.2 1017.5 1014.0 1007.6 1004.4 1008.1 1013.4 1019.5 1026.5 1033.9 1033.9 DAY 24 13 17 6 20 3 15 25 22 15 16 7 MIN. QFF PRESSURE IN HPA 1002.6 1008.6 1002.2 1005.7 1000.3 994.4 994.8 998.8 1004.6 1008.1 1007.7 1009.6 994.4 DAY 20 25 8 30 31 18 21 15 26 5 8 31 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 881.3 878.9 879.5 879.1 878.1 874.3 876.6 878.5 881.8 883.2 882.4 882.2 879.6 MAX. QFE PRESSURE IN HPA 887.7 884.8 886.8 884.1 884.5 880.6 880.5 880.8 885.6 889.6 888.9 893.4 893.4 DAY 24 22 28 5 20 3 15 24 22 15 16 7 MIN. QFE PRESSURE IN HPA 868.3 873.1 870.5 874.4 872.9 869.8 872.8 874.9 878.4 879.2 875.2 875.0 868.3 DAY 20 16 8 11 3 18 21 15 26 1 8 30 MEAN QNH PRESSURE IN HPA 1018.8 1016.0 1016.7 1016.3 1015.2 1010.8 1013.5 1015.6 1019.3 1020.9 1020.0 1019.8 1016.9 MAX. QNH PRESSURE IN HPA 1025.9 1022.7 1024.9 1021.9 1022.3 1017.9 1017.8 1018.2 1023.6 1028.1 1027.3 1032.3 1032.3 DAY 24 22 28 5 20 3 15 24 22 15 16 7 MIN. QNH PRESSURE IN HPA 1004.1 1009.5 1006.6 1011.0 1009.3 1005.8 1009.2 1011.5 1015.5 1016.4 1011.9 1011.6 1004.1 DAY 20 16 8 11 3 18 21 15 26 1 8 30 MEAN QFF PRESSURE IN HPA 1020.3 1016.4 1016.8 1011.8 1008.4 1001.0 1002.1 1005.4 1011.1 1015.2 1019.1 1022.2 1012.5 MAX. QFF PRESSURE IN HPA 1030.8 1021.9 1026.4 1018.1 1015.7 1009.1 1006.8 1010.1 1015.7 1022.6 1027.8 1035.2 1035.2 DAY 24 22 17 6 19 3 15 31 22 15 16 7 MIN. QFF PRESSURE IN HPA 1004.2 1009.8 1005.0 1007.1 1002.2 995.7 997.0 1001.3 1007.0 1009.5 1008.8 1011.5 995.7 DAY 20 25 8 30 10 28 21 15 26 5 8 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 882.5 879.9 880.7 880.0 878.9 874.8 877.4 879.0 882.7 884.3 883.4 883.2 880.6 MAX. QFE PRESSURE IN HPA 888.5 886.3 887.1 887.2 885.2 881.0 880.8 881.6 887.0 890.2 889.4 893.5 893.5 DAY 24 22 28 5 18 2 15 31 22 15 16 7 MIN. QFE PRESSURE IN HPA 869.2 874.1 872.7 875.5 874.8 870.9 873.1 875.7 879.6 880.2 876.4 875.4 869.2 DAY 20 16 8 11 4 17 20 15 6 1 8 30 MEAN QNH PRESSURE IN HPA 1020.1 1017.2 1018.1 1017.3 1016.1 1011.4 1014.4 1016.2 1020.3 1022.1 1021.1 1020.9 1017.9 MAX. QNH PRESSURE IN HPA 1026.8 1024.4 1025.3 1025.4 1023.1 1018.4 1018.2 1019.1 1025.1 1028.7 1027.8 1032.5 1032.5 DAY 24 22 28 5 18 2 15 31 22 15 16 7 MIN. QNH PRESSURE IN HPA 1005.1 1010.6 1009.1 1012.2 1011.4 1007.0 1009.5 1012.4 1016.8 1017.5 1013.2 1012.1 1005.1 DAY 20 16 8 11 4 17 20 15 6 1 8 30 MEAN QFF PRESSURE IN HPA 1021.3 1017.2 1017.9 1012.3 1008.7 1001.1 1002.3 1005.2 1011.1 1015.2 1019.5 1022.8 1012.9 MAX. QFF PRESSURE IN HPA 1031.4 1023.4 1026.4 1022.0 1016.4 1008.9 1006.9 1010.1 1015.7 1022.2 1027.4 1034.3 1034.3 DAY 24 13 17 5 18 2 22 31 22 15 16 7 MIN. QFF PRESSURE IN HPA 1005.8 1010.0 1007.8 1007.0 1003.5 996.0 996.8 1000.7 1007.1 1009.6 1009.0 1011.2 996.0 DAY 20 25 8 30 31 17 20 15 26 5 8 30 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.3 879.3 880.3 879.4 878.6 874.1 876.8 878.3 881.8 883.3 882.3 882.2 879.8 MAX. QFE PRESSURE IN HPA 888.0 886.1 886.7 886.1 884.6 880.7 879.7 880.7 886.5 889.1 888.5 891.6 891.6 DAY 24 22 28 5 19 2 3 31 22 15 16 7 MIN. QFE PRESSURE IN HPA 868.2 874.0 874.0 875.3 874.2 870.2 872.1 875.1 878.2 878.6 875.4 873.0 868.2 DAY 20 16 8 11 10 18 20 15 29 1 7 20 MEAN QNH PRESSURE IN HPA 1018.8 1016.5 1017.6 1016.7 1015.7 1010.7 1013.7 1015.4 1019.4 1021.0 1019.9 1019.8 1017.1 MAX. QNH PRESSURE IN HPA 1026.3 1024.1 1024.8 1024.1 1022.4 1018.1 1016.9 1018.1 1024.6 1027.5 1026.8 1030.3 1030.3 DAY 24 22 28 5 19 2 3 31 22 15 16 7 MIN. QNH PRESSURE IN HPA 1004.0 1010.5 1010.5 1012.0 1010.7 1006.3 1008.4 1011.8 1015.3 1015.7 1012.1 1009.4 1004.0 DAY 20 16 8 11 10 18 20 15 29 1 7 20 MEAN QFF PRESSURE IN HPA 1019.1 1015.9 1017.0 1011.2 1008.0 1000.0 1001.2 1003.9 1009.7 1013.6 1017.8 1020.9 1011.5 MAX. QFF PRESSURE IN HPA 1029.9 1023.5 1025.6 1020.9 1015.1 1008.0 1005.6 1008.7 1014.2 1020.0 1025.7 1032.0 1032.0 DAY 24 13 16 5 19 2 22 31 22 15 16 11 MIN. QFF PRESSURE IN HPA 1004.5 1008.5 1009.2 1005.8 1001.5 995.2 995.1 999.6 1005.5 1007.4 1007.4 1009.1 995.1 DAY 20 25 10 30 10 18 20 15 29 1 7 30 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.2 877.9 878.9 878.2 877.6 872.6 875.2 876.6 880.1 882.0 881.3 881.4 878.5 MAX. QFE PRESSURE IN HPA 886.9 884.3 885.7 885.1 883.3 879.2 878.2 879.5 884.9 887.0 887.0 889.2 889.2 DAY 24 22 27 5 19 2 3 31 22 15 16 7 MIN. QFE PRESSURE IN HPA 868.6 873.6 872.4 874.2 873.6 869.1 870.5 873.3 876.7 877.6 874.5 872.4 868.6 DAY 20 16 8 30 11 18 20 6 29 1 7 30 MEAN QNH PRESSURE IN HPA 1017.4 1014.9 1016.0 1015.2 1014.5 1009.0 1011.8 1013.4 1017.3 1019.5 1018.7 1018.8 1015.6 MAX. QNH PRESSURE IN HPA 1025.0 1022.1 1023.7 1023.0 1021.0 1016.4 1015.3 1016.7 1022.8 1025.1 1025.1 1027.6 1027.6 DAY 24 22 27 5 19 2 3 31 22 15 16 7 MIN. QNH PRESSURE IN HPA 1004.4 1010.1 1008.7 1010.7 1010.1 1005.0 1006.6 1009.7 1013.6 1014.6 1011.1 1008.7 1004.4 DAY 20 16 8 30 11 18 20 6 29 1 7 30 MEAN QFF PRESSURE IN HPA 1017.7 1014.3 1015.5 1010.0 1007.1 998.6 999.7 1002.2 1007.9 1012.4 1016.7 1020.0 1010.2 MAX. QFF PRESSURE IN HPA 1028.5 1021.8 1025.1 1019.9 1014.6 1007.1 1003.7 1007.6 1013.3 1018.2 1024.6 1030.7 1030.7 DAY 24 13 16 5 18 2 22 31 22 15 15 11 MIN. QFF PRESSURE IN HPA 1005.6 1007.0 1007.1 1004.3 1000.4 993.9 993.8 998.3 1004.0 1006.6 1006.7 1007.0 993.8 DAY 19 25 8 30 31 28 20 15 29 1 7 30 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 880.7 878.1 878.8 877.9 877.2 871.9 874.5 876.1 879.8 882.2 881.9 882.1 878.4 MAX. QFE PRESSURE IN HPA 887.1 883.5 886.0 884.6 883.2 878.3 877.6 879.4 884.0 886.6 888.1 891.0 891.0 DAY 28 22 27 5 18 2 15 31 22 14 15 6 MIN. QFE PRESSURE IN HPA 869.1 874.1 873.4 873.7 872.8 868.2 869.4 872.3 876.9 877.5 874.8 872.3 868.2 DAY 19 15 8 11 11 17 20 6 29 1 7 30 MEAN QNH PRESSURE IN HPA 1018.0 1015.2 1015.9 1014.9 1014.1 1008.2 1011.1 1012.9 1017.0 1019.8 1019.4 1019.6 1015.5 MAX. QNH PRESSURE IN HPA 1025.3 1021.2 1024.0 1022.4 1020.9 1015.4 1014.6 1016.6 1021.8 1024.7 1026.4 1029.6 1029.6 DAY 28 22 27 5 18 2 15 31 22 14 15 6 MIN. QNH PRESSURE IN HPA 1005.0 1010.6 1009.8 1010.2 1009.2 1004.0 1005.3 1008.6 1013.8 1014.5 1011.4 1008.6 1004.0 DAY 19 15 8 11 11 17 20 6 29 1 7 30 MEAN QFF PRESSURE IN HPA 1019.4 1015.4 1016.0 1010.3 1007.2 998.2 999.5 1002.6 1008.8 1014.0 1018.5 1022.0 1011.0 MAX. QFF PRESSURE IN HPA 1029.8 1022.0 1025.9 1019.7 1015.0 1007.1 1003.4 1008.3 1013.7 1019.4 1027.1 1032.6 1032.6 DAY 24 13 16 5 18 2 15 31 21 15 15 6 MIN. QFF PRESSURE IN HPA 1005.5 1008.7 1008.2 1004.9 1001.5 993.1 992.7 998.8 1005.5 1007.1 1008.3 1008.6 992.7 DAY 19 25 6 30 31 28 20 22 25 1 7 30 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 881.3 878.9 879.6 878.9 878.0 872.7 875.5 877.3 880.9 883.0 882.4 882.6 879.3 MAX. QFE PRESSURE IN HPA 888.0 883.7 886.6 884.5 884.3 879.4 878.7 881.0 885.0 887.9 889.2 893.5 893.5 DAY 28 22 27 5 19 2 15 24 22 14 15 6 MIN. QFE PRESSURE IN HPA 869.5 874.2 874.0 874.9 873.9 868.5 870.3 873.7 878.0 879.1 874.8 873.2 868.5 DAY 19 15 9 10 11 17 20 4 5 1 7 30 MEAN QNH PRESSURE IN HPA 1018.7 1016.1 1016.8 1016.0 1015.0 1009.1 1012.2 1014.2 1018.3 1020.7 1020.0 1020.2 1016.4 MAX. QNH PRESSURE IN HPA 1026.3 1021.4 1024.7 1022.3 1022.1 1016.6 1015.8 1018.4 1022.9 1026.2 1027.6 1032.5 1032.5 DAY 28 22 27 5 19 2 15 24 22 14 15 6 MIN. QNH PRESSURE IN HPA 1005.5 1010.7 1010.5 1011.5 1010.4 1004.3 1006.4 1010.2 1015.0 1016.3 1011.4 1009.6 1004.3 DAY 19 15 9 10 11 17 20 4 5 1 7 30 MEAN QFF PRESSURE IN HPA 1019.9 1016.0 1016.6 1010.9 1007.5 998.8 1000.3 1003.4 1009.2 1013.9 1018.5 1022.1 1011.4 MAX. QFF PRESSURE IN HPA 1030.8 1022.4 1026.7 1020.3 1014.6 1007.0 1004.0 1009.3 1013.6 1019.3 1027.5 1034.8 1034.8 DAY 24 13 16 5 19 2 15 31 22 14 15 6 MIN. QFF PRESSURE IN HPA 1005.4 1009.0 1007.9 1005.7 1001.9 993.5 993.2 999.0 1005.4 1008.1 1007.9 1009.0 993.2 DAY 19 25 7 30 30 17 20 4 25 1 7 30 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 881.2 878.9 879.5 878.8 877.9 873.1 875.7 877.6 881.0 883.1 882.4 882.5 879.3 MAX. QFE PRESSURE IN HPA 888.0 883.4 887.1 883.4 884.3 879.3 878.8 881.4 885.2 888.6 889.5 893.6 893.6 DAY 23 22 27 5 19 2 31 31 22 14 15 6 MIN. QFE PRESSURE IN HPA 868.1 873.6 873.7 874.6 874.1 868.9 870.7 873.7 878.0 879.3 874.9 873.0 868.1 DAY 19 15 7 11 11 17 20 14 5 1 10 30 MEAN QNH PRESSURE IN HPA 1018.6 1016.1 1016.8 1015.9 1014.9 1009.5 1012.4 1014.5 1018.4 1020.8 1019.9 1020.1 1016.5 MAX. QNH PRESSURE IN HPA 1026.3 1021.1 1025.3 1021.1 1022.1 1016.5 1015.9 1018.8 1023.1 1026.9 1028.0 1032.6 1032.6 DAY 23 22 27 5 19 2 31 31 22 14 15 6 MIN. QNH PRESSURE IN HPA 1003.9 1010.1 1010.2 1011.2 1010.6 1004.8 1006.8 1010.2 1015.0 1016.5 1011.5 1009.4 1003.9 DAY 19 15 7 11 11 17 20 14 5 1 10 30 MEAN QFF PRESSURE IN HPA 1018.9 1015.4 1016.2 1010.4 1007.2 998.9 1000.2 1003.3 1008.9 1013.5 1017.9 1021.3 1011.0 MAX. QFF PRESSURE IN HPA 1030.3 1022.0 1026.6 1018.9 1014.6 1007.0 1003.7 1009.3 1013.1 1019.5 1027.1 1034.1 1034.1 DAY 23 13 16 5 18 2 15 31 22 14 15 6 MIN. QFF PRESSURE IN HPA 1002.5 1009.2 1006.3 1005.7 1000.6 993.9 993.1 998.6 1005.3 1007.8 1007.1 1008.0 993.1 DAY 19 25 7 30 30 17 20 14 25 1 10 30 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.8 8.4 10.3 17.0 24.2 29.5 29.9 30.3 25.2 14.7 12.7 6.7 18.0 MINIMUN AIR TEMPERATURE (C) 1.9 3.9 5.8 10.6 18.2 22.9 23.5 23.9 19.2 10.6 8.3 3.2 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 8 27 26 28 7 0 0 0 96 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 3 2 1 0 0 0 0 0 0 0 0 6 12 TEMPERATURE RECORDS LOWEST(C) -1.5 -1.0 -1.0 1.0 11.0 17.5 18.5 18.0 14.5 5.0 0.5 -3.5 -3.5 DAY 1 11 21 6 6 6 4 28 30 27 30 31 MAXIMUM AIR TEMPERATURE (C) 12.6 14.2 15.7 23.1 30.3 35.4 36.0 36.5 31.9 19.7 18.5 11.7 23.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 20 30 30 31 23 4 0 0 139 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 20.5 23.0 30.0 34.0 38.2 41.0 39.0 37.5 31.0 24.0 16.0 41.0 DAY 31 2 9 17 10 29 20 19 6 3 5 22 DIF. BETWEEN (MAX.-MIN.) (C) 10.7 10.3 9.9 12.5 12.1 12.5 12.5 12.6 12.7 9.1 10.2 8.5 11.1 MEAN DAILY TEMP. (MDT) (C) 7.3 9.1 10.7 16.9 24.2 29.1 29.7 30.2 25.6 15.2 13.4 7.5 18.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 3.8 109.7 244.0 270.5 284.2 136.5 14.5 0.0 0.0 1063.3 HEATING DEG. DAYS(BASE 18 0C) 331.9 241.9 225.3 70.7 0.0 0.0 0.0 0.0 0.0 122.5 138.2 326.0 1456.5 DEWPOINT (MEAN C) -3.9 -1.4 -0.5 1.5 7.2 8.5 12.8 10.9 8.7 5.1 0.1 -1.3 4.0 MIXING RATIO (G/KG) 3.32 4.02 4.44 5.09 7.44 8.15 10.87 9.59 8.25 6.41 4.59 4.08 6.35 VAPOUR PRESSURE (HPA) 4.68 5.65 6.21 7.12 10.38 11.33 15.03 13.29 11.50 9.01 6.47 5.75 8.87 SATURATION DEF. (HPA) 5.49 5.77 6.81 13.38 20.90 30.88 28.51 30.97 21.57 8.71 8.82 4.34 15.51 RELATIVE HUMIDITY (MEAN %) 49 53 51 39 36 28 36 32 37 58 46 59 44 RELATIVE HUMIDITY (MAX. %) 65 68 69 56 50 37 48 43 52 70 58 74 58 RELATIVE HUMIDITY (MIN. %) 32 36 34 26 25 21 29 23 26 44 33 41 31 RELATIVE HUMIDITY (MEAN% 03UTC) 59 62 63 51 44 34 45 41 46 65 52 68 53 RELATIVE HUMIDITY (MEAN% 09UTC) 36 43 42 32 29 24 32 26 34 48 37 45 36 RELATIVE HUMIDITY (MEAN% 15UTC) 45 50 45 32 31 24 32 27 35 58 47 58 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 11.2 32.1 84.1 31.4 28.5 0.0 11.8 5.0 5.4 90.0 7.3 24.1 330.9 DAYS WITH PRECIPITATION >=10 0 1 5 1 1 0 0 0 0 4 0 0 12 DAYS WITH PRECIPITATION >= 5 1 2 5 2 1 0 1 0 1 4 1 2 20 DAYS WITH PRECIPITATION >= 1 3 7 7 4 5 0 3 2 1 9 1 5 47 DAYS WITH PRECIPITATION 5 11 14 11 10 0 5 3 3 13 7 10 92 GREATEST DAILY PRECIPITATION 5.0 11.4 33.0 17.0 19.0 0.0 8.0 4.0 5.0 28.0 7.0 8.0 33.0 DAY 7 9 4 4 20 ** 27 6 29 27 26 13 DAY WITH THUNDER STORM 1 0 3 3 7 1 4 2 1 2 0 0 24 DAYS WITH SNOW OR SLEET 0 2 1 0 0 0 0 0 0 0 0 1 4 DAYS WITH DUST 0 1 0 2 4 5 5 0 3 0 2 0 22 WIND DIRECTION (PREVAILING) 45 45 45 45 45 45 45 360 360 360 360 360 45 PREVAILING WIND SPEED(KNOTS) 5.5 6.5 6.8 6.6 6.8 6.3 7.1 5.9 5.7 6.0 6.1 5.3 6.6 PREVAILING WIND PERCENT 6.9 11.6 15.3 17.9 20.2 23.3 15.7 15.3 19.6 14.1 28.8 16.5 11.8 CALMS PERCENT OF WIND 81.5 71.4 45.6 49.2 45.6 42.1 50.4 38.7 54.2 65.7 51.7 63.7 54.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 283 320 300 320 341 67 101 80 37 26 11 324 14 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.2 0.7 0.7 0.2 0.3 0.7 1.3 0.6 0.9 1.3 0.4 0.4 WIND STEADINESES (MEAN %) 42.9 10.5 17.9 18.9 4.7 7.9 21.2 33.3 22.2 42.9 44.8 18.2 13.3 WIND SPEED (MEAN KNOTS) 1.4 1.9 3.9 3.7 4.3 3.8 3.3 3.9 2.7 2.1 2.9 2.2 3.0 FASTEST WIND DIRECTION 270 260 250 260 20 40 30 70 280 180 240 240 20 FASTEST WIND SPEED (KNOTS) 17 17 19 23 39 21 29 25 23 29 19 21 39 DAY 3 11 11 26 30 19 2 5 27 8 19 29 DAYS WITH SKY CLEAR (0-2)/8 22 9 7 13 11 27 24 26 27 11 17 10 204 DAYS WITH P.CLOUDY (3-6)/8 7 13 14 12 14 3 7 5 2 6 7 16 106 DAYS WITH CLOUDY (7-8)/8 2 6 10 5 6 0 0 0 1 14 6 5 55 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS 195.2 158.7 197.5 248.2 236.5 327.4 317.7 325.9 271.0 150.4 163.1 133.4 2725.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 882.8 881.2 876.0 878.8 879.0 876.2 875.5 875.5 879.0 884.2 884.2 882.3 879.6 MAX. QFE PRESSURE IN HPA 891.9 889.1 885.2 886.1 885.1 882.1 880.7 883.2 885.6 891.8 894.8 894.9 894.9 DAY-HOUR 12- 6 1- 6 23- 6 22- 6 1- 6 28- 6 11- 6 8- 6 26- 6 16- 6 30- 6 1- 6 MIN. QFE PRESSURE IN HPA 873.6 872.2 864.5 868.2 872.2 872.1 867.6 869.8 873.8 873.7 873.2 871.8 864.5 DAY-HOUR 6-18 10-12 14- 0 4-15 22-15 18-15 3-15 25-15 6-15 4-15 7-12 24- 0 MEAN QNH PRESSURE IN HPA 1020.4 1018.7 1012.7 1016.0 1016.2 1013.0 1012.2 1012.2 1016.2 1022.0 1022.0 1019.9 1016.8 MAX. QNH PRESSURE IN HPA 1030.7 1027.5 1023.1 1024.1 1023.0 1019.6 1018.1 1020.9 1023.6 1030.5 1033.9 1034.0 1034.0 DAY-HOUR 12- 6 1- 6 23- 6 22- 6 1- 6 28- 6 11- 6 8- 6 26- 6 16- 6 30- 6 1- 6 MIN. QNH PRESSURE IN HPA 1010.1 1008.5 999.8 1004.0 1008.5 1008.4 1003.3 1005.8 1010.3 1010.2 1009.6 1008.1 999.8 DAY-HOUR 6-18 10-12 14- 0 4-15 22-15 18-15 3-15 25-15 6-15 4-15 7-12 24- 0 MEAN QFF PRESSURE IN HPA 1020.7 1017.9 1010.9 1010.9 1007.5 1001.8 1000.6 1000.5 1007.0 1018.0 1019.1 1020.0 1011.2 MAX. QFF PRESSURE IN HPA 1032.0 1029.6 1022.6 1020.8 1015.8 1008.4 1007.8 1009.8 1016.0 1028.8 1035.8 1036.3 1036.3 DAY-HOUR 12- 6 12- 6 22- 6 1- 6 1- 3 1- 3 11- 6 8- 3 24- 6 28-21 30- 6 1- 6 MIN. QFF PRESSURE IN HPA 1010.0 1007.2 998.2 1000.3 999.4 996.6 991.8 994.0 999.2 1001.7 1003.8 1005.5 991.8 DAY-HOUR 6-18 4-21 14- 0 4-15 22-15 18- 0 3-12 25-15 6-12 4-12 7-12 24- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 882.6 881.3 875.7 878.6 878.9 876.3 875.5 875.4 878.9 883.8 883.9 882.5 879.4 MAX. QFE PRESSURE IN HPA 890.0 887.3 883.4 883.2 884.1 880.5 878.7 881.5 884.1 890.1 893.8 893.6 893.8 DAY 12 7 23 22 1 28 11 8 26 17 30 1 MIN. QFE PRESSURE IN HPA 874.1 875.2 864.5 871.2 873.5 872.7 869.6 871.9 875.9 876.1 876.8 871.8 864.5 DAY 7 11 14 5 23 18 3 26 2 5 7 24 MEAN QNH PRESSURE IN HPA 1020.2 1018.7 1012.4 1015.7 1016.1 1013.1 1012.2 1012.1 1016.0 1021.5 1021.7 1020.0 1016.6 MAX. QNH PRESSURE IN HPA 1028.5 1025.5 1021.1 1020.9 1021.9 1017.8 1015.8 1019.0 1021.9 1028.6 1032.8 1032.6 1032.8 DAY 12 7 23 22 1 28 11 8 26 17 30 1 MIN. QNH PRESSURE IN HPA 1010.6 1011.9 999.8 1007.4 1010.0 1009.1 1005.6 1008.2 1012.7 1012.9 1013.7 1008.1 999.8 DAY 7 11 14 5 23 18 3 26 2 5 7 24 MEAN QFF PRESSURE IN HPA 1020.0 1017.5 1010.2 1010.5 1007.4 1001.9 1000.6 1000.3 1006.4 1017.2 1018.4 1019.7 1010.8 MAX. QFF PRESSURE IN HPA 1028.5 1026.3 1020.9 1017.6 1014.4 1006.7 1006.4 1007.6 1013.2 1027.3 1034.7 1034.5 1034.7 DAY 12 7 23 2 1 1 29 8 25 29 30 1 MIN. QFF PRESSURE IN HPA 1010.7 1008.1 998.2 1004.0 1000.9 996.6 993.3 995.9 1001.8 1004.5 1008.0 1005.5 993.3 DAY 7 5 14 19 23 18 3 26 2 5 7 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 882.6 881.4 876.0 879.3 879.5 877.1 876.2 876.4 879.5 884.2 884.2 882.4 879.9 MAX. QFE PRESSURE IN HPA 890.4 887.5 884.2 884.8 884.6 881.6 879.3 882.4 884.8 890.0 893.8 893.8 893.8 DAY 12 1 23 22 1 28 11 8 26 16 30 1 MIN. QFE PRESSURE IN HPA 874.8 874.3 866.1 872.4 874.0 874.2 870.2 872.9 876.5 876.8 876.1 873.2 866.1 DAY 3 10 14 5 23 5 3 26 2 4 7 24 MEAN QNH PRESSURE IN HPA 1020.2 1018.9 1012.8 1016.4 1016.7 1014.1 1013.0 1013.2 1016.8 1022.0 1022.0 1020.0 1017.2 MAX. QNH PRESSURE IN HPA 1029.0 1025.7 1022.0 1022.7 1022.4 1019.1 1016.5 1020.0 1022.7 1028.5 1032.8 1032.8 1032.8 DAY 12 1 23 22 1 28 11 8 26 16 30 1 MIN. QNH PRESSURE IN HPA 1011.4 1010.9 1001.6 1008.7 1010.5 1010.7 1006.3 1009.3 1013.3 1013.7 1012.9 1009.6 1001.6 DAY 3 10 14 5 23 5 3 26 2 4 7 24 MEAN QFF PRESSURE IN HPA 1021.2 1018.7 1011.5 1012.1 1008.5 1003.4 1001.9 1002.2 1008.4 1018.7 1019.9 1020.8 1012.3 MAX. QFF PRESSURE IN HPA 1030.8 1028.1 1022.4 1019.9 1015.8 1008.4 1007.0 1009.8 1014.7 1027.8 1035.6 1036.1 1036.1 DAY 12 12 23 22 1 1 29 8 24 29 30 1 MIN. QFF PRESSURE IN HPA 1012.0 1009.9 1000.1 1006.4 1001.6 998.9 994.8 997.7 1003.1 1006.8 1007.6 1007.6 994.8 DAY 7 5 14 5 23 18 3 19 6 4 7 24 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 883.9 882.5 877.1 880.0 880.0 877.7 876.9 877.0 880.6 885.3 885.2 883.4 880.8 MAX. QFE PRESSURE IN HPA 891.9 889.1 885.2 886.1 885.1 882.1 880.7 883.2 885.6 891.8 894.8 894.9 894.9 DAY 12 1 23 22 1 28 11 8 26 16 30 1 MIN. QFE PRESSURE IN HPA 876.8 875.0 867.9 872.8 874.8 874.7 871.2 873.4 877.1 877.6 876.4 874.6 867.9 DAY 3 10 14 4 23 5 3 25 2 4 7 24 MEAN QNH PRESSURE IN HPA 1021.7 1020.1 1014.0 1017.3 1017.3 1014.6 1013.8 1013.9 1018.0 1023.3 1023.2 1021.1 1018.2 MAX. QNH PRESSURE IN HPA 1030.7 1027.5 1023.1 1024.1 1023.0 1019.6 1018.1 1020.9 1023.6 1030.5 1033.9 1034.0 1034.0 DAY 12 1 23 22 1 28 11 8 26 16 30 1 MIN. QNH PRESSURE IN HPA 1013.7 1011.6 1003.7 1009.2 1011.4 1011.3 1007.4 1009.8 1014.0 1014.6 1013.2 1011.2 1003.7 DAY 3 10 14 4 23 5 3 25 2 4 7 24 MEAN QFF PRESSURE IN HPA 1022.5 1019.8 1012.3 1012.3 1008.5 1003.5 1002.2 1002.1 1008.7 1019.3 1020.4 1021.6 1012.8 MAX. QFF PRESSURE IN HPA 1032.0 1029.6 1022.6 1020.8 1015.3 1007.8 1007.8 1009.4 1016.0 1028.6 1035.8 1036.3 1036.3 DAY 12 12 22 1 1 1 11 8 24 28 30 1 MIN. QFF PRESSURE IN HPA 1014.6 1011.8 1002.3 1005.3 1001.9 1000.1 996.1 997.4 1002.7 1006.3 1008.1 1009.7 996.1 DAY 3 5 14 26 23 5 3 25 6 4 7 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 883.0 881.9 876.6 879.4 879.5 877.0 876.2 876.2 879.8 884.6 884.4 882.3 880.1 MAX. QFE PRESSURE IN HPA 891.3 888.6 884.3 885.8 884.0 881.4 879.9 882.5 884.4 890.5 894.5 893.9 894.5 DAY 12 1 23 22 1 28 11 8 24 16 30 1 MIN. QFE PRESSURE IN HPA 875.6 874.0 868.1 872.8 874.0 874.2 870.2 872.8 876.4 876.4 875.6 874.9 868.1 DAY 6 10 14 4 23 18 3 25 6 4 7 30 MEAN QNH PRESSURE IN HPA 1020.7 1019.4 1013.5 1016.6 1016.8 1013.9 1013.0 1013.0 1017.0 1022.5 1022.3 1019.9 1017.4 MAX. QNH PRESSURE IN HPA 1030.0 1026.9 1022.1 1023.8 1021.8 1018.8 1017.2 1020.1 1022.2 1029.1 1033.6 1032.9 1033.6 DAY 12 1 23 22 1 28 11 8 24 16 30 1 MIN. QNH PRESSURE IN HPA 1012.3 1010.5 1003.9 1009.2 1010.5 1010.7 1006.3 1009.2 1013.2 1013.2 1012.3 1011.5 1003.9 DAY 6 10 14 4 23 18 3 25 6 4 7 30 MEAN QFF PRESSURE IN HPA 1020.4 1018.2 1011.1 1011.2 1007.6 1002.4 1001.0 1000.9 1007.2 1018.1 1018.8 1019.6 1011.4 MAX. QFF PRESSURE IN HPA 1030.4 1028.1 1021.1 1019.6 1013.8 1007.0 1006.4 1008.2 1014.6 1028.2 1035.2 1034.1 1035.2 DAY 12 12 22 1 1 1 11 8 24 28 30 1 MIN. QFF PRESSURE IN HPA 1012.1 1009.8 1001.9 1004.7 1000.8 998.6 994.2 996.5 1001.4 1004.0 1006.8 1009.5 994.2 DAY 2 10 14 26 23 18 3 25 6 4 7 24 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 881.7 880.2 875.2 878.0 878.2 875.5 874.8 874.5 878.1 883.4 883.3 881.4 878.7 MAX. QFE PRESSURE IN HPA 889.7 887.2 882.5 884.9 881.8 879.4 877.7 880.1 883.1 889.4 893.5 892.0 893.5 DAY 12 12 23 22 1 28 28 7 27 28 30 1 MIN. QFE PRESSURE IN HPA 874.0 872.2 866.6 870.6 873.4 872.9 868.2 870.8 874.6 874.1 873.2 873.7 866.6 DAY 6 10 14 4 22 13 3 25 6 4 7 30 MEAN QNH PRESSURE IN HPA 1019.2 1017.5 1011.9 1015.0 1015.3 1012.2 1011.4 1011.1 1015.1 1021.1 1021.0 1018.8 1015.8 MAX. QNH PRESSURE IN HPA 1028.2 1025.4 1020.1 1022.8 1019.3 1016.6 1014.7 1017.4 1020.8 1027.8 1032.5 1030.8 1032.5 DAY 12 12 23 22 1 28 28 7 27 28 30 1 MIN. QNH PRESSURE IN HPA 1010.5 1008.5 1002.2 1006.7 1009.8 1009.3 1004.0 1006.9 1011.2 1010.6 1009.6 1010.2 1002.2 DAY 6 10 14 4 22 13 3 25 6 4 7 30 MEAN QFF PRESSURE IN HPA 1018.9 1016.3 1009.7 1009.7 1006.6 1000.8 999.6 999.1 1005.4 1016.8 1017.8 1018.5 1009.9 MAX. QFF PRESSURE IN HPA 1028.6 1026.4 1018.5 1018.9 1011.8 1005.3 1005.3 1006.4 1012.8 1027.5 1034.0 1032.2 1034.0 DAY 12 12 23 22 19 1 28 7 27 28 30 1 MIN. QFF PRESSURE IN HPA 1011.0 1007.8 999.9 1002.4 1000.7 997.0 991.8 994.6 999.2 1001.7 1003.8 1010.1 991.8 DAY 2 4 14 26 23 18 3 25 6 4 7 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 882.3 880.4 875.3 877.7 877.9 874.6 873.9 873.9 877.8 883.6 883.7 882.0 878.6 MAX. QFE PRESSURE IN HPA 889.7 886.9 882.2 884.0 882.5 878.7 877.6 879.5 882.6 889.5 893.3 892.5 893.3 DAY 12 1 22 22 12 28 28 7 25 28 30 1 MIN. QFE PRESSURE IN HPA 874.5 872.3 867.1 868.2 872.2 872.1 867.6 869.8 873.8 873.7 873.6 873.9 867.1 DAY 2 10 14 4 22 18 3 25 6 4 7 30 MEAN QNH PRESSURE IN HPA 1019.9 1017.7 1011.9 1014.7 1014.9 1011.2 1010.5 1010.4 1014.8 1021.4 1021.4 1019.5 1015.7 MAX. QNH PRESSURE IN HPA 1028.2 1025.0 1019.7 1021.8 1020.1 1015.8 1014.6 1016.7 1020.2 1028.0 1032.2 1031.3 1032.2 DAY 12 1 22 22 12 28 28 7 25 28 30 1 MIN. QNH PRESSURE IN HPA 1011.1 1008.6 1002.8 1004.0 1008.5 1008.4 1003.3 1005.8 1010.3 1010.2 1010.1 1010.4 1002.8 DAY 2 10 14 4 22 18 3 25 6 4 7 30 MEAN QFF PRESSURE IN HPA 1020.8 1017.6 1010.6 1010.1 1006.6 1000.4 999.2 999.4 1006.4 1018.0 1019.4 1020.3 1010.7 MAX. QFF PRESSURE IN HPA 1030.4 1026.9 1020.6 1018.7 1011.8 1004.7 1005.5 1006.5 1013.2 1027.8 1035.4 1034.2 1035.4 DAY 12 12 22 22 1 1 28 7 24 28 30 1 MIN. QFF PRESSURE IN HPA 1012.2 1008.8 1001.9 1000.3 999.4 997.0 991.9 994.0 999.3 1002.7 1004.7 1009.9 991.9 DAY 6 4 14 4 22 19 3 25 6 4 7 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 883.0 881.2 876.0 878.9 879.0 875.6 875.1 875.1 878.7 884.3 884.3 882.3 879.5 MAX. QFE PRESSURE IN HPA 890.2 887.1 883.3 884.0 883.1 879.4 879.4 881.3 883.8 890.4 894.1 893.3 894.1 DAY 12 1 22 22 3 28 28 6 25 28 30 1 MIN. QFE PRESSURE IN HPA 873.6 873.1 868.1 870.9 872.9 872.8 869.0 871.0 875.4 875.6 875.6 874.3 868.1 DAY 6 10 13 4 22 9 3 25 6 4 7 30 MEAN QNH PRESSURE IN HPA 1020.7 1018.6 1012.8 1016.0 1016.1 1012.3 1011.7 1011.8 1015.9 1022.2 1022.1 1019.9 1016.7 MAX. QNH PRESSURE IN HPA 1028.7 1025.3 1021.0 1021.8 1020.8 1016.6 1016.6 1018.7 1021.5 1029.0 1033.1 1032.2 1033.1 DAY 12 1 22 22 3 28 28 6 25 28 30 1 MIN. QNH PRESSURE IN HPA 1010.1 1009.5 1003.9 1007.0 1009.3 1009.2 1004.9 1007.2 1012.1 1012.3 1012.3 1010.9 1003.9 DAY 6 10 13 4 22 9 3 25 6 4 7 30 MEAN QFF PRESSURE IN HPA 1021.3 1018.3 1011.0 1010.9 1007.3 1001.2 1000.2 1000.2 1006.7 1018.3 1019.5 1020.4 1011.3 MAX. QFF PRESSURE IN HPA 1030.5 1027.0 1021.2 1019.1 1012.2 1005.0 1007.7 1008.4 1013.4 1028.7 1035.3 1034.4 1035.3 DAY 12 6 22 1 19 28 28 6 24 28 30 1 MIN. QFF PRESSURE IN HPA 1010.0 1009.0 1002.5 1003.3 1000.0 998.2 993.9 994.6 1000.8 1004.0 1007.1 1009.4 993.9 DAY 6 4 13 19 22 19 3 25 6 4 7 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 883.0 881.2 876.1 879.0 879.2 875.9 875.3 875.3 879.0 884.4 884.5 882.3 879.6 MAX. QFE PRESSURE IN HPA 890.2 887.1 883.5 884.2 882.7 879.8 878.9 881.5 884.4 890.8 894.3 893.3 894.3 DAY 20 1 22 30 19 28 28 7 25 28 30 1 MIN. QFE PRESSURE IN HPA 873.9 873.5 867.3 870.5 873.2 873.0 870.3 871.5 875.7 875.9 876.8 873.7 867.3 DAY 6 10 13 4 22 9 3 18 5 4 7 23 MEAN QNH PRESSURE IN HPA 1020.7 1018.6 1012.9 1016.2 1016.4 1012.7 1012.0 1012.0 1016.2 1022.2 1022.4 1019.8 1016.8 MAX. QNH PRESSURE IN HPA 1028.7 1025.3 1021.2 1022.0 1020.3 1017.0 1016.0 1019.0 1022.2 1029.4 1033.4 1032.2 1033.4 DAY 20 1 22 30 19 28 28 7 25 28 30 1 MIN. QNH PRESSURE IN HPA 1010.4 1010.0 1003.0 1006.6 1009.6 1009.4 1006.4 1007.7 1012.4 1012.7 1013.7 1010.2 1003.0 DAY 6 10 13 4 22 9 3 18 5 4 7 23 MEAN QFF PRESSURE IN HPA 1020.3 1017.4 1010.6 1010.7 1007.2 1001.3 1000.1 1000.0 1006.6 1017.9 1019.1 1019.6 1010.9 MAX. QFF PRESSURE IN HPA 1028.8 1026.8 1020.4 1019.3 1014.5 1005.0 1006.5 1007.4 1013.6 1028.8 1035.3 1033.3 1035.3 DAY 20 6 22 1 19 28 28 7 24 28 30 1 MIN. QFF PRESSURE IN HPA 1010.4 1007.2 1002.2 1003.0 1000.3 997.4 994.7 995.1 1000.9 1003.9 1008.5 1008.2 994.7 DAY 6 4 13 19 22 17 2 25 6 4 7 23 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.9 5.6 11.3 16.8 23.8 28.4 30.5 29.3 25.7 19.5 12.4 7.1 17.9 MINIMUN AIR TEMPERATURE (C) -0.1 1.3 6.1 11.0 17.4 22.4 24.1 22.9 19.3 14.0 8.1 3.0 12.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 24 27 25 8 0 0 0 89 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 1 4 DAYS WITH FREEZING MIN.<= 0 15 15 1 0 0 0 0 0 0 0 1 8 40 TEMPERATURE RECORDS LOWEST(C) -4.0 -3.2 -0.5 1.5 12.0 18.0 17.5 18.5 15.8 9.0 -1.5 -5.5 -5.5 DAY 1 7 6 2 4 26 27 25 29 23 15 29 MAXIMUM AIR TEMPERATURE (C) 8.8 10.9 17.0 22.9 29.5 34.1 36.4 35.6 32.6 26.1 18.5 12.6 23.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 16 30 31 31 26 0 0 0 134 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.5 19.0 24.5 29.0 35.0 38.5 39.5 39.0 38.0 29.5 25.5 21.0 39.5 DAY 10 29 20 18 28 13 3 12 10 6 8 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 9.6 10.9 11.9 12.1 11.7 12.3 12.7 13.3 12.1 10.4 9.6 11.2 MEAN DAILY TEMP. (MDT) (C) 4.4 6.1 11.6 17.0 23.4 28.3 30.3 29.2 26.0 20.0 13.3 7.8 18.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 8.3 86.1 217.5 286.8 255.7 149.0 11.8 0.0 0.0 1015.4 HEATING DEG. DAYS(BASE 18 0C) 422.0 344.9 199.6 69.6 0.0 0.0 0.0 0.0 0.0 8.3 149.3 316.7 1510.3 DEWPOINT (MEAN C) -2.9 -3.3 -2.6 3.3 5.1 5.6 12.2 12.5 8.0 5.1 0.1 -3.0 3.3 MIXING RATIO (G/KG) 3.60 3.53 3.83 5.91 6.43 6.73 10.67 10.66 7.90 6.50 4.74 3.64 6.18 VAPOUR PRESSURE (HPA) 5.06 4.95 5.35 8.25 8.98 9.35 14.70 14.72 11.01 9.13 6.66 5.12 8.61 SATURATION DEF. (HPA) 3.23 4.60 8.52 11.89 21.50 30.38 30.06 27.23 23.20 14.27 8.60 5.44 15.74 RELATIVE HUMIDITY (MEAN %) 63 57 42 44 32 25 35 37 34 42 46 52 42 RELATIVE HUMIDITY (MAX. %) 79 75 60 65 48 37 49 52 47 55 67 70 59 RELATIVE HUMIDITY (MIN. %) 48 41 27 28 21 16 24 27 25 30 29 34 29 RELATIVE HUMIDITY (MEAN% 03UTC) 72 66 54 56 45 34 45 49 42 48 53 59 52 RELATIVE HUMIDITY (MEAN% 09UTC) 52 48 35 34 26 21 32 32 29 33 35 40 35 RELATIVE HUMIDITY (MEAN% 15UTC) 62 53 35 41 24 19 28 30 33 44 44 50 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 54.7 33.5 39.8 36.0 6.0 2.0 6.5 8.0 1.0 14.8 11.5 49.2 263.0 DAYS WITH PRECIPITATION >=10 2 1 1 0 0 0 0 0 0 1 0 2 7 DAYS WITH PRECIPITATION >= 5 4 3 3 3 0 0 0 1 0 1 0 3 18 DAYS WITH PRECIPITATION >= 1 7 7 7 11 2 1 1 2 1 2 4 5 50 DAYS WITH PRECIPITATION 10 12 10 13 4 2 7 2 1 3 10 7 81 GREATEST DAILY PRECIPITATION 17.0 11.0 10.0 8.0 3.4 2.0 4.0 5.0 1.0 10.6 3.5 26.0 26.0 DAY 19 9 3 14 6 6 19 25 3 16 13 17 DAY WITH THUNDER STORM 0 0 2 5 2 2 3 1 1 0 0 0 16 DAYS WITH SNOW OR SLEET 5 5 0 0 0 0 0 0 0 0 0 3 13 DAYS WITH DUST 0 0 2 0 1 2 2 0 0 0 1 1 9 WIND DIRECTION (PREVAILING) 360 360 360 360 360 360 360 360 360 360 45 360 360 PREVAILING WIND SPEED(KNOTS) 5.0 5.4 6.1 6.2 6.2 6.9 6.0 5.8 5.8 5.6 7.6 5.9 5.9 PREVAILING WIND PERCENT 16.9 16.4 12.5 14.6 14.9 12.5 11.7 14.9 16.7 11.7 10.4 13.7 13.9 CALMS PERCENT OF WIND 58.9 52.2 46.4 56.7 42.7 42.1 56.5 57.7 59.2 70.6 62.5 66.5 56.0 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 12 45 274 26 261 8 80 65 24 14 351 349 2 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.6 0.8 0.8 1.0 0.6 0.8 0.3 0.2 0.7 0.9 0.7 0.4 WIND STEADINESES (MEAN %) 17.4 21.4 20.5 27.6 25.0 13.6 26.7 12.0 8.0 41.2 31.0 30.4 13.8 WIND SPEED (MEAN KNOTS) 2.3 2.8 3.9 2.9 4.0 4.4 3.0 2.5 2.5 1.7 2.9 2.3 2.9 FASTEST WIND DIRECTION 240 240 280 270 240 280 270 220 250 270 250 270 240 FASTEST WIND SPEED (KNOTS) 21 21 33 29 39 31 27 21 31 14 29 23 39 DAY 29 4 21 21 21 1 10 24 3 31 2 1 DAYS WITH SKY CLEAR (0-2)/8 9 10 16 9 25 25 28 25 26 20 15 16 224 DAYS WITH P.CLOUDY (3-6)/8 14 12 11 14 6 5 3 6 4 10 7 11 103 DAYS WITH CLOUDY (7-8)/8 8 7 4 7 0 0 0 0 0 1 8 4 39 DAYS WITH VISIBILITY =< 2 KM 4 2 0 1 0 0 0 0 0 1 1 2 11 DURATION OF SUNSHINE HOURS 130.6 130.1 229.4 180.0 318.8 335.0 343.4 321.2 299.8 252.3 178.6 162.5 2881.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 880.8 879.6 876.1 878.6 877.1 874.0 872.4 874.0 878.4 882.5 882.5 880.4 878.0 MAX. QFE PRESSURE IN HPA 891.8 890.9 886.6 889.0 884.1 880.9 879.5 881.0 884.5 889.8 890.7 888.1 891.8 DAY-HOUR 3- 6 7- 6 17- 6 9- 6 17- 6 8- 6 31- 6 21- 6 24- 6 16- 6 6- 6 30- 6 MIN. QFE PRESSURE IN HPA 872.0 869.3 867.2 871.5 872.0 867.2 867.3 868.4 873.0 874.9 874.4 864.9 864.9 DAY-HOUR 29- 3 2-12 5- 0 30-15 1- 0 24-15 8-15 4-15 12-15 30-15 28-12 27- 6 MEAN QNH PRESSURE IN HPA 1018.2 1016.8 1012.8 1015.8 1014.0 1010.5 1008.7 1010.5 1015.4 1020.1 1020.1 1017.8 1015.0 MAX. QNH PRESSURE IN HPA 1030.5 1029.5 1024.7 1027.4 1021.9 1018.3 1016.7 1018.4 1022.3 1028.3 1029.3 1026.4 1030.5 DAY-HOUR 3- 6 7- 6 17- 6 9- 6 17- 6 8- 6 31- 6 21- 6 24- 6 16- 6 6- 6 30- 6 MIN. QNH PRESSURE IN HPA 1008.3 1005.2 1002.9 1007.7 1008.3 1002.9 1003.0 1004.2 1009.4 1011.5 1011.0 1000.3 1000.3 DAY-HOUR 29- 3 2-12 5- 0 30-15 1- 0 24-15 8-15 4-15 12-15 30-15 28-12 27- 6 MEAN QFF PRESSURE IN HPA 1019.9 1017.6 1010.5 1010.7 1005.5 999.9 996.8 999.1 1006.0 1013.7 1017.3 1017.7 1009.5 MAX. QFF PRESSURE IN HPA 1034.0 1033.7 1022.3 1025.5 1013.9 1008.5 1004.6 1006.6 1014.6 1025.4 1027.4 1031.4 1034.0 DAY-HOUR 3- 6 7- 6 17- 6 9- 6 5- 6 8- 6 31- 3 21- 6 24- 6 16- 6 15-18 29-15 MIN. QFF PRESSURE IN HPA 1007.6 1002.2 1000.6 1000.3 998.5 992.9 991.2 992.5 997.9 1004.8 1007.9 1000.3 991.2 DAY-HOUR 29- 0 2-12 5- 0 23-12 28-12 24-15 17-15 2-15 11-12 30-12 10-12 27- 6 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 880.6 879.2 875.7 878.3 876.8 874.2 872.3 874.0 878.0 882.3 882.5 880.4 877.9 MAX. QFE PRESSURE IN HPA 890.2 889.5 884.0 887.5 882.2 879.9 877.8 877.4 882.9 888.8 888.1 886.9 890.2 DAY 3 7 17 9 17 8 31 26 25 17 7 22 MIN. QFE PRESSURE IN HPA 872.1 871.4 867.2 872.8 872.0 868.7 868.3 869.5 873.5 875.8 875.9 868.0 867.2 DAY 29 2 5 25 1 24 18 30 12 31 29 27 MEAN QNH PRESSURE IN HPA 1017.9 1016.4 1012.5 1015.3 1013.7 1010.7 1008.7 1010.5 1015.1 1019.9 1020.1 1017.7 1014.9 MAX. QNH PRESSURE IN HPA 1028.7 1028.0 1021.8 1025.7 1019.7 1017.2 1014.8 1014.4 1020.5 1027.2 1026.4 1025.0 1028.7 DAY 3 7 17 9 17 8 31 26 25 17 7 22 MIN. QNH PRESSURE IN HPA 1008.4 1007.6 1002.9 1009.2 1008.3 1004.6 1004.1 1005.5 1010.0 1012.6 1012.7 1003.8 1002.9 DAY 29 2 5 25 1 24 18 30 12 31 29 27 MEAN QFF PRESSURE IN HPA 1019.3 1016.9 1009.9 1009.9 1005.1 999.9 996.5 998.9 1005.2 1013.0 1016.9 1017.2 1009.1 MAX. QFF PRESSURE IN HPA 1031.4 1032.5 1019.1 1023.6 1011.4 1007.7 1002.0 1004.7 1012.4 1022.9 1025.3 1028.8 1032.5 DAY 3 7 17 9 6 8 30 26 25 17 16 30 MIN. QFF PRESSURE IN HPA 1007.6 1004.2 1000.6 1000.5 999.8 994.2 991.4 993.8 998.4 1005.7 1010.3 1003.7 991.4 DAY 29 2 5 25 25 30 18 4 12 31 11 27 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 880.6 879.6 876.3 878.9 877.7 875.0 873.4 874.9 878.9 882.7 882.6 880.4 878.4 MAX. QFE PRESSURE IN HPA 890.5 889.8 885.1 887.7 883.7 879.9 879.0 879.4 883.5 888.2 888.9 886.9 890.5 DAY 3 7 17 9 17 8 31 21 14 17 6 30 MIN. QFE PRESSURE IN HPA 872.0 870.9 867.6 873.1 872.8 869.5 869.1 870.7 873.9 876.7 876.2 865.8 865.8 DAY 29 2 5 25 1 24 18 30 12 31 20 27 MEAN QNH PRESSURE IN HPA 1018.0 1016.9 1013.1 1016.1 1014.6 1011.7 1009.8 1011.5 1016.0 1020.3 1020.2 1017.8 1015.5 MAX. QNH PRESSURE IN HPA 1029.1 1028.3 1023.0 1025.9 1021.4 1017.2 1016.2 1016.6 1021.2 1026.5 1027.3 1025.0 1029.1 DAY 3 7 17 9 17 8 31 21 14 17 6 30 MIN. QNH PRESSURE IN HPA 1008.3 1007.0 1003.3 1009.5 1009.2 1005.5 1005.0 1006.8 1010.4 1013.6 1013.0 1001.3 1001.3 DAY 29 2 5 25 1 24 18 30 12 31 20 27 MEAN QFF PRESSURE IN HPA 1020.2 1018.1 1011.4 1011.7 1006.8 1001.5 998.5 1000.7 1007.6 1015.0 1018.3 1018.5 1010.7 MAX. QFF PRESSURE IN HPA 1032.5 1033.0 1021.5 1024.6 1013.7 1007.9 1004.6 1005.7 1014.3 1022.9 1027.3 1030.1 1033.0 DAY 3 7 17 9 17 8 31 21 25 17 16 30 MIN. QFF PRESSURE IN HPA 1008.2 1004.8 1001.4 1001.5 1001.1 995.1 993.5 995.8 1000.5 1008.2 1010.8 1001.6 993.5 DAY 29 2 5 25 25 30 18 4 12 7 11 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 881.7 880.7 877.2 879.9 878.3 875.5 873.9 875.6 880.0 883.8 883.7 881.4 879.3 MAX. QFE PRESSURE IN HPA 891.8 890.9 886.6 889.0 884.1 880.9 879.5 881.0 884.5 889.8 890.7 888.1 891.8 DAY 3 7 17 9 17 8 31 21 24 16 6 30 MIN. QFE PRESSURE IN HPA 873.2 872.1 869.9 874.2 873.9 869.4 869.7 871.6 875.3 878.3 876.5 864.9 864.9 DAY 29 2 5 30 1 30 18 4 12 31 20 27 MEAN QNH PRESSURE IN HPA 1019.2 1018.1 1014.2 1017.2 1015.4 1012.2 1010.4 1012.3 1017.2 1021.5 1021.4 1018.9 1016.5 MAX. QNH PRESSURE IN HPA 1030.5 1029.5 1024.7 1027.4 1021.9 1018.3 1016.7 1018.4 1022.3 1028.3 1029.3 1026.4 1030.5 DAY 3 7 17 9 17 8 31 21 24 16 6 30 MIN. QNH PRESSURE IN HPA 1009.6 1008.4 1005.9 1010.7 1010.4 1005.3 1005.7 1007.8 1012.0 1015.4 1013.3 1000.3 1000.3 DAY 29 2 5 30 1 30 18 4 12 31 20 27 MEAN QFF PRESSURE IN HPA 1021.3 1019.1 1012.0 1012.3 1006.8 1001.5 998.6 1000.8 1007.6 1015.1 1018.6 1019.0 1011.1 MAX. QFF PRESSURE IN HPA 1034.0 1033.7 1022.3 1025.5 1013.9 1008.5 1004.2 1006.6 1014.6 1025.4 1026.1 1030.7 1034.0 DAY 3 7 17 9 5 8 31 21 24 16 15 30 MIN. QFF PRESSURE IN HPA 1010.1 1006.0 1001.7 1003.7 1001.2 994.3 993.1 995.9 1001.1 1007.9 1010.1 1000.3 993.1 DAY 29 2 21 25 28 30 18 4 12 7 20 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.1 880.0 876.6 879.3 877.8 874.7 873.2 874.8 879.0 883.0 882.5 880.5 878.5 MAX. QFE PRESSURE IN HPA 890.7 889.6 885.7 888.1 883.3 880.0 878.8 880.2 883.8 889.5 888.6 886.4 890.7 DAY 3 7 17 9 17 8 31 21 14 16 6 29 MIN. QFE PRESSURE IN HPA 873.3 870.8 870.7 874.2 874.2 868.5 869.7 871.1 874.6 877.2 875.7 866.6 866.6 DAY 29 2 5 23 1 30 17 4 12 30 28 27 MEAN QNH PRESSURE IN HPA 1018.5 1017.3 1013.5 1016.5 1014.8 1011.4 1009.6 1011.5 1016.2 1020.6 1020.1 1017.8 1015.6 MAX. QNH PRESSURE IN HPA 1029.3 1028.1 1023.7 1026.4 1021.0 1017.3 1015.9 1017.5 1021.5 1028.0 1026.9 1024.5 1029.3 DAY 3 7 17 9 17 8 31 21 14 16 6 29 MIN. QNH PRESSURE IN HPA 1009.7 1006.9 1006.8 1010.7 1010.7 1004.3 1005.7 1007.3 1011.2 1014.1 1012.4 1002.2 1002.2 DAY 29 2 5 23 1 30 17 4 12 30 28 27 MEAN QFF PRESSURE IN HPA 1019.8 1017.7 1010.8 1010.9 1006.0 1000.4 997.4 999.6 1006.1 1013.7 1016.8 1017.2 1009.7 MAX. QFF PRESSURE IN HPA 1031.1 1031.6 1020.9 1023.6 1012.8 1006.9 1003.1 1005.4 1012.9 1024.2 1024.5 1029.0 1031.6 DAY 3 7 17 9 5 8 31 21 30 16 15 29 MIN. QFF PRESSURE IN HPA 1009.2 1004.0 1001.9 1002.4 1000.0 993.0 993.1 995.1 999.5 1006.8 1009.4 1003.5 993.0 DAY 29 2 21 23 28 30 18 4 12 7 20 27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.0 878.7 875.3 877.7 876.3 873.3 871.5 873.1 877.4 881.6 881.4 879.5 877.1 MAX. QFE PRESSURE IN HPA 889.9 887.8 883.6 886.0 881.0 878.7 876.3 878.0 882.1 887.9 887.1 885.9 889.9 DAY 3 7 17 9 16 7 31 21 14 16 6 29 MIN. QFE PRESSURE IN HPA 872.2 869.3 869.3 872.0 872.8 868.0 868.0 869.2 873.1 875.1 874.4 866.9 866.9 DAY 29 2 4 23 28 30 8 4 12 30 28 26 MEAN QNH PRESSURE IN HPA 1017.2 1015.8 1012.0 1014.7 1013.1 1009.7 1007.7 1009.6 1014.3 1019.0 1018.8 1016.7 1014.1 MAX. QNH PRESSURE IN HPA 1028.4 1026.0 1021.3 1024.0 1018.4 1015.8 1013.1 1015.0 1019.6 1026.2 1025.3 1023.9 1028.4 DAY 3 7 17 9 16 7 31 21 14 16 6 29 MIN. QNH PRESSURE IN HPA 1008.5 1005.2 1005.2 1008.3 1009.2 1003.8 1003.8 1005.1 1009.5 1011.8 1011.0 1002.5 1002.5 DAY 29 2 4 23 28 30 8 4 12 30 28 26 MEAN QFF PRESSURE IN HPA 1018.5 1016.2 1009.4 1009.3 1004.5 998.9 995.4 997.9 1004.4 1012.1 1015.6 1016.3 1008.2 MAX. QFF PRESSURE IN HPA 1030.4 1029.6 1018.7 1021.7 1011.1 1006.5 1000.3 1003.7 1011.2 1021.7 1024.8 1028.3 1030.4 DAY 3 6 17 9 5 7 27 26 30 16 15 29 MIN. QFF PRESSURE IN HPA 1008.6 1002.2 1003.5 1000.3 998.5 993.2 991.4 993.2 997.9 1004.8 1007.9 1002.7 991.4 DAY 29 2 9 23 28 30 17 4 11 30 10 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 880.5 879.0 875.3 877.9 875.9 872.5 870.6 872.4 877.2 881.7 882.0 880.0 877.1 MAX. QFE PRESSURE IN HPA 890.4 888.6 883.1 885.8 880.6 878.1 875.8 877.2 881.9 888.6 887.7 887.3 890.4 DAY 3 6 17 8 17 7 30 21 14 16 6 29 MIN. QFE PRESSURE IN HPA 874.1 869.7 868.4 871.5 872.8 867.2 867.3 868.4 873.0 874.9 875.2 867.6 867.2 DAY 29 2 4 30 1 24 8 4 12 30 28 26 MEAN QNH PRESSURE IN HPA 1017.8 1016.2 1012.0 1014.9 1012.6 1008.8 1006.7 1008.7 1014.2 1019.1 1019.5 1017.3 1014.0 MAX. QNH PRESSURE IN HPA 1029.0 1026.9 1020.8 1023.8 1017.9 1015.1 1012.6 1014.1 1019.4 1026.9 1025.9 1025.5 1029.0 DAY 3 6 17 8 17 7 30 21 14 16 6 29 MIN. QNH PRESSURE IN HPA 1010.6 1005.7 1004.2 1007.7 1009.2 1002.9 1003.0 1004.2 1009.4 1011.5 1011.9 1003.3 1002.9 DAY 29 2 4 30 1 24 8 4 12 30 28 26 MEAN QFF PRESSURE IN HPA 1019.9 1017.4 1010.2 1010.4 1004.7 998.6 995.4 997.9 1005.7 1013.7 1017.6 1018.0 1009.1 MAX. QFF PRESSURE IN HPA 1032.7 1031.0 1019.1 1022.0 1011.3 1006.0 1002.0 1003.8 1012.8 1023.4 1027.1 1031.4 1032.7 DAY 3 6 17 8 5 7 27 21 30 16 15 29 MIN. QFF PRESSURE IN HPA 1011.6 1003.3 1003.0 1002.7 999.6 992.9 991.2 992.5 998.7 1006.1 1008.3 1004.0 991.2 DAY 26 2 4 23 28 24 17 2 11 30 10 26 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 881.1 879.8 876.0 878.7 876.8 873.5 871.8 873.3 878.2 882.4 882.6 880.7 877.9 MAX. QFE PRESSURE IN HPA 890.4 889.8 883.1 886.8 880.7 879.2 877.0 877.8 883.0 889.3 888.2 887.8 890.4 DAY 3 6 17 8 16 6 30 21 14 16 6 29 MIN. QFE PRESSURE IN HPA 874.0 871.4 868.1 872.0 873.0 868.1 867.9 869.0 873.8 875.6 875.8 868.6 867.9 DAY 28 1 4 30 24 30 17 29 11 30 28 26 MEAN QNH PRESSURE IN HPA 1018.6 1017.0 1012.8 1015.8 1013.6 1009.9 1008.1 1009.7 1015.3 1020.0 1020.2 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1029.0 1028.3 1020.8 1024.9 1018.1 1016.4 1013.9 1014.8 1020.6 1027.7 1026.5 1026.0 1029.0 DAY 3 6 17 8 16 6 30 21 14 16 6 29 MIN. QNH PRESSURE IN HPA 1010.5 1007.6 1003.9 1008.3 1009.4 1003.9 1003.7 1004.9 1010.3 1012.3 1012.6 1004.4 1003.7 DAY 28 1 4 30 24 30 17 29 11 30 28 26 MEAN QFF PRESSURE IN HPA 1020.6 1018.0 1010.6 1010.8 1005.1 999.3 996.3 998.4 1005.9 1013.7 1017.5 1018.2 1009.5 MAX. QFF PRESSURE IN HPA 1032.5 1032.5 1018.4 1023.1 1011.2 1006.4 1002.8 1003.6 1013.2 1024.8 1027.4 1031.3 1032.5 DAY 3 6 17 8 4 6 27 26 24 16 15 29 MIN. QFF PRESSURE IN HPA 1010.9 1005.5 1001.2 1002.4 999.5 992.9 991.4 993.7 999.3 1006.0 1011.2 1005.4 991.4 DAY 28 1 4 24 24 29 17 3 11 30 8 26 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 881.1 879.7 876.1 878.7 877.0 873.7 872.4 873.7 878.4 882.5 882.7 880.7 878.0 MAX. QFE PRESSURE IN HPA 890.2 889.8 883.5 887.2 881.6 879.1 877.5 877.7 883.1 889.6 888.1 887.5 890.2 DAY 3 6 17 8 16 8 30 21 24 16 6 29 MIN. QFE PRESSURE IN HPA 873.8 872.3 868.1 872.0 873.3 868.3 868.3 869.7 873.9 875.6 875.6 868.7 868.1 DAY 28 1 4 30 24 30 17 29 11 30 28 26 MEAN QNH PRESSURE IN HPA 1018.5 1016.9 1012.9 1015.8 1013.9 1010.1 1008.7 1010.2 1015.5 1020.1 1020.3 1018.1 1015.1 MAX. QNH PRESSURE IN HPA 1028.7 1028.3 1021.2 1025.4 1019.1 1016.3 1014.5 1014.7 1020.8 1028.1 1026.4 1025.7 1028.7 DAY 3 6 17 8 16 8 30 21 24 16 6 29 MIN. QNH PRESSURE IN HPA 1010.3 1008.6 1003.9 1008.3 1009.7 1004.1 1004.1 1005.7 1010.4 1012.3 1012.3 1004.6 1003.9 DAY 28 1 4 30 24 30 17 29 11 30 28 26 MEAN QFF PRESSURE IN HPA 1019.6 1017.3 1010.2 1010.2 1005.1 999.2 996.6 998.5 1005.6 1013.3 1017.1 1017.5 1009.2 MAX. QFF PRESSURE IN HPA 1030.6 1032.5 1018.5 1022.7 1011.5 1006.0 1001.8 1003.5 1013.0 1024.2 1025.8 1029.7 1032.5 DAY 3 6 17 8 5 8 30 26 30 16 15 29 MIN. QFF PRESSURE IN HPA 1009.4 1005.5 1001.0 1001.7 999.6 993.2 991.8 993.7 998.7 1005.2 1010.3 1005.0 991.8 DAY 28 1 4 24 24 30 17 3 11 30 10 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.7 1.8 11.0 19.2 23.1 30.0 32.2 31.0 25.8 20.6 12.8 7.5 18.0 MINIMUN AIR TEMPERATURE (C) -2.8 -3.3 5.8 12.7 16.8 23.2 26.1 24.7 19.2 15.1 7.8 3.7 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 7 23 31 31 15 0 0 0 107 DAYS WITH MINIMUM TEMP. <=-4 10 10 0 0 0 0 0 0 0 0 0 0 20 DAYS WITH FREEZING MIN.<= 0 27 27 1 1 0 0 0 0 0 0 2 2 60 TEMPERATURE RECORDS LOWEST(C) -8.0 -10.0 -2.0 -2.0 9.0 18.5 23.0 22.0 12.0 10.0 0.0 -1.0 -10.0 DAY 5 15 31 1 1 1 24 19 20 23 22 9 MAXIMUM AIR TEMPERATURE (C) 5.5 7.0 16.5 24.8 28.7 35.9 38.1 37.2 32.5 26.9 18.5 12.1 23.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 10 30 31 31 20 7 0 0 129 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 11.0 16.0 22.0 29.0 37.0 42.0 42.0 40.0 38.0 32.0 23.0 19.0 42.0 DAY 2 28 25 16 25 30 11 4 2 5 28 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.3 10.3 10.7 12.1 11.9 12.7 12.0 12.5 13.3 11.8 10.7 8.4 11.2 MEAN DAILY TEMP. (MDT) (C) 1.3 1.9 11.1 18.7 22.7 29.6 32.1 30.9 25.9 21.0 13.1 7.9 18.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 7.3 82.3 257.0 343.1 308.4 154.2 41.5 0.0 0.0 1193.8 HEATING DEG. DAYS(BASE 18 0C) 516.5 451.7 212.7 29.5 5.0 0.0 0.0 0.0 0.0 10.5 146.1 312.6 1684.7 DEWPOINT (MEAN C) -6.1 -5.3 1.3 -1.6 2.7 3.9 9.1 7.8 4.7 2.2 -0.3 -0.6 1.5 MIXING RATIO (G/KG) 2.85 3.01 4.95 4.05 5.49 6.05 8.57 7.73 6.31 5.24 4.44 4.29 5.25 VAPOUR PRESSURE (HPA) 4.02 4.24 6.92 5.69 7.68 8.42 11.88 10.74 8.80 7.37 6.26 6.02 7.34 SATURATION DEF. (HPA) 2.58 2.99 6.62 17.28 22.01 35.25 37.37 35.26 26.21 17.90 8.93 4.57 18.08 RELATIVE HUMIDITY (MEAN %) 63 62 55 27 29 21 25 25 28 32 43 59 39 RELATIVE HUMIDITY (MAX. %) 80 79 72 41 45 32 36 33 38 46 56 75 53 RELATIVE HUMIDITY (MIN. %) 46 45 38 16 18 13 18 18 20 22 27 39 27 RELATIVE HUMIDITY (MEAN% 03UTC) 70 68 64 35 37 28 32 32 35 37 53 65 46 RELATIVE HUMIDITY (MEAN% 09UTC) 54 52 44 22 23 18 22 21 23 24 33 49 32 RELATIVE HUMIDITY (MEAN% 15UTC) 62 58 50 22 23 16 22 22 26 34 42 57 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.4 36.7 35.6 1.8 4.1 0.0 0.0 0.0 0.0 1.6 2.6 47.0 174.8 DAYS WITH PRECIPITATION >=10 2 2 0 0 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 5 5 3 2 0 0 0 0 0 0 0 0 3 13 DAYS WITH PRECIPITATION >= 1 7 4 10 1 1 0 0 0 0 1 1 8 33 DAYS WITH PRECIPITATION 8 8 14 4 7 1 1 0 0 2 4 11 60 GREATEST DAILY PRECIPITATION 11.0 16.0 8.5 1.6 4.0 0.0 0.0 0.0 0.0 1.0 2.0 17.0 17.0 DAY 12 14 11 29 7 ** ** ** ** 31 15 4 DAY WITH THUNDER STORM 0 0 2 2 1 0 0 0 0 0 1 0 6 DAYS WITH SNOW OR SLEET 7 6 1 0 0 0 0 0 0 0 0 0 14 DAYS WITH DUST 3 0 0 0 4 2 1 0 2 2 0 0 14 WIND DIRECTION (PREVAILING) 180 45 45 45 90 90 90 90 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 5.7 4.9 7.8 7.9 7.3 6.1 6.7 6.5 6.2 6.0 5.7 5.7 6.3 PREVAILING WIND PERCENT 8.9 8.9 12.1 17.9 10.9 17.5 15.7 26.6 15.4 24.6 22.5 19.4 11.7 CALMS PERCENT OF WIND 74.6 69.6 56.5 32.9 40.3 45.0 50.8 32.7 39.2 41.9 47.1 54.8 48.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 138 130 25 21 133 326 336 16 106 18 9 61 40 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.4 0.4 0.3 0.6 0.5 0.4 0.8 0.4 0.4 0.5 0.5 0.3 WIND STEADINESES (MEAN %) 13.3 23.5 12.5 6.0 13.3 12.5 12.9 19.0 10.5 10.5 15.2 20.0 8.8 WIND SPEED (MEAN KNOTS) 1.5 1.7 3.2 5.0 4.5 4.0 3.1 4.2 3.8 3.8 3.3 2.5 3.4 FASTEST WIND DIRECTION 240 240 270 330 120 190 80 80 180 280 250 270 120 FASTEST WIND SPEED (KNOTS) 16 29 31 29 49 49 12 16 19 23 25 14 49 DAY 17 24 5 4 18 8 6 13 19 21 28 5 DAYS WITH SKY CLEAR (0-2)/8 16 18 9 14 19 29 31 25 29 25 20 13 248 DAYS WITH P.CLOUDY (3-6)/8 7 4 14 14 10 1 0 6 1 5 9 14 85 DAYS WITH CLOUDY (7-8)/8 8 6 8 2 2 0 0 0 0 1 1 4 32 DAYS WITH VISIBILITY =< 2 KM 6 5 1 0 1 0 0 0 0 0 0 5 18 DURATION OF SUNSHINE HOURS 158.9 167.4 174.1 142.0 ****** ****** ****** ****** ****** 259.0 204.0 112.1 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 880.6 882.5 877.2 879.9 878.7 874.4 875.0 875.4 877.5 882.2 882.7 880.8 878.9 MAX. QFE PRESSURE IN HPA 888.7 890.7 883.7 884.8 885.0 879.1 881.1 881.4 888.8 889.8 888.0 887.6 890.7 DAY-HOUR 22- 6 4- 6 7-21 11- 6 1- 6 2- 6 20- 6 19- 6 23- 6 27- 6 8- 6 18-18 MIN. QFE PRESSURE IN HPA 872.6 871.8 865.8 874.4 869.8 867.9 869.0 867.7 870.4 875.1 877.5 872.7 865.8 DAY-HOUR 17-12 23- 3 29-15 29- 9 31-15 10-15 5-15 1-15 13-15 2-15 24-12 5- 3 MEAN QNH PRESSURE IN HPA 1018.0 1020.1 1014.1 1017.2 1015.8 1011.0 1011.6 1012.1 1014.4 1019.7 1020.3 1018.2 1016.0 MAX. QNH PRESSURE IN HPA 1027.1 1029.3 1021.4 1022.7 1022.9 1016.3 1018.5 1018.8 1027.2 1028.3 1026.3 1025.8 1029.3 DAY-HOUR 22- 6 4- 6 7-21 11- 6 1- 6 2- 6 20- 6 19- 6 23- 6 27- 6 8- 6 18-18 MIN. QNH PRESSURE IN HPA 1008.9 1008.1 1001.3 1011.0 1005.8 1003.7 1004.9 1003.4 1006.5 1011.8 1014.5 1009.1 1001.3 DAY-HOUR 17-12 23- 3 29-15 29- 9 31-15 10-15 5-15 1-15 13-15 2-15 24-12 5- 3 MEAN QFF PRESSURE IN HPA 1021.4 1023.1 1011.9 1011.2 1007.9 999.7 999.1 1000.3 1005.0 1012.9 1017.4 1017.8 1010.6 MAX. QFF PRESSURE IN HPA 1032.2 1034.6 1019.7 1020.3 1018.7 1007.5 1006.5 1008.6 1021.4 1023.7 1024.8 1027.0 1034.6 DAY-HOUR 30- 6 4- 6 12- 6 2- 6 1- 3 2- 3 20- 3 19- 6 23- 6 24- 6 22- 6 18-18 MIN. QFF PRESSURE IN HPA 1011.1 1008.5 999.8 1002.9 995.1 992.9 992.4 992.3 996.1 1004.1 1011.1 1008.3 992.3 DAY-HOUR 2-12 23-12 29-15 29- 6 31-18 30-15 6-15 1-15 11-12 2-12 16-12 5- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 880.5 882.3 877.1 879.8 878.7 874.4 874.9 875.4 877.5 882.2 882.8 880.8 878.9 MAX. QFE PRESSURE IN HPA 887.8 889.2 882.8 883.5 881.8 877.9 878.8 879.3 887.2 888.1 886.6 885.9 889.2 DAY 22 4 8 9 2 4 20 20 24 27 9 19 MIN. QFE PRESSURE IN HPA 874.2 872.1 867.5 875.8 875.2 870.1 870.1 869.5 871.6 875.7 877.6 872.9 867.5 DAY 3 23 30 29 28 11 7 2 13 2 25 5 MEAN QNH PRESSURE IN HPA 1017.8 1019.9 1014.0 1017.1 1015.8 1011.0 1011.5 1012.1 1014.4 1019.8 1020.4 1018.2 1016.0 MAX. QNH PRESSURE IN HPA 1026.0 1027.6 1020.4 1021.2 1019.3 1014.9 1015.9 1016.5 1025.4 1026.4 1024.7 1023.9 1027.6 DAY 22 4 8 9 2 4 20 20 24 27 9 19 MIN. QNH PRESSURE IN HPA 1010.7 1008.4 1003.2 1012.6 1011.9 1006.1 1006.1 1005.5 1007.8 1012.4 1014.6 1009.3 1003.2 DAY 3 23 30 29 28 11 7 2 13 2 25 5 MEAN QFF PRESSURE IN HPA 1020.8 1022.6 1011.5 1010.9 1007.7 999.7 998.9 1000.1 1004.6 1012.5 1017.1 1017.5 1010.3 MAX. QFF PRESSURE IN HPA 1030.1 1032.2 1017.9 1016.7 1014.7 1005.1 1004.0 1005.7 1019.0 1021.0 1022.3 1024.2 1032.2 DAY 30 4 1 2 2 2 23 20 24 25 23 19 MIN. QFF PRESSURE IN HPA 1011.4 1008.7 1000.0 1003.8 1001.0 995.1 992.9 993.4 997.2 1004.5 1011.9 1008.3 992.9 DAY 3 23 16 29 28 30 7 2 13 2 17 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 880.4 882.2 877.3 880.2 879.4 875.2 875.9 876.3 878.0 882.5 883.0 880.7 879.3 MAX. QFE PRESSURE IN HPA 887.1 889.2 882.9 883.8 884.8 878.9 881.0 880.6 887.7 888.4 886.8 885.2 889.2 DAY 22 4 8 9 1 2 20 19 24 27 8 19 MIN. QFE PRESSURE IN HPA 872.8 871.8 867.2 875.0 875.3 871.2 871.0 870.8 871.8 875.8 878.2 872.7 867.2 DAY 17 23 30 29 31 11 6 2 12 2 25 5 MEAN QNH PRESSURE IN HPA 1017.7 1019.8 1014.2 1017.5 1016.6 1011.9 1012.7 1013.1 1015.1 1020.0 1020.6 1018.0 1016.4 MAX. QNH PRESSURE IN HPA 1025.3 1027.6 1020.5 1021.5 1022.7 1016.0 1018.4 1017.9 1025.9 1026.7 1024.9 1023.1 1027.6 DAY 22 4 8 9 1 2 20 19 24 27 8 19 MIN. QNH PRESSURE IN HPA 1009.2 1008.1 1002.9 1011.6 1012.0 1007.4 1007.2 1006.9 1008.1 1012.6 1015.3 1009.1 1002.9 DAY 17 23 30 29 31 11 6 2 12 2 25 5 MEAN QFF PRESSURE IN HPA 1021.7 1023.5 1012.6 1012.2 1009.2 1001.0 1000.6 1001.9 1006.5 1014.1 1018.6 1018.2 1011.7 MAX. QFF PRESSURE IN HPA 1031.3 1033.4 1019.3 1019.6 1018.7 1007.5 1006.5 1007.8 1020.8 1022.9 1023.2 1024.8 1033.4 DAY 30 4 1 2 1 2 20 20 23 25 22 19 MIN. QFF PRESSURE IN HPA 1012.3 1008.9 1001.3 1003.5 1002.0 995.5 994.6 995.6 998.2 1005.7 1013.6 1008.5 994.6 DAY 17 23 16 29 31 30 7 2 12 2 20 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 881.8 883.4 878.3 881.2 880.1 875.9 876.7 877.0 879.0 883.6 884.0 881.7 880.2 MAX. QFE PRESSURE IN HPA 888.7 890.7 883.4 884.8 885.0 879.1 881.1 881.4 888.8 889.8 888.0 885.6 890.7 DAY 22 4 8 11 1 2 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA 873.5 873.0 868.8 874.9 875.5 871.1 871.9 871.1 872.9 876.2 880.1 874.3 868.8 DAY 17 23 30 29 31 10 6 2 12 2 20 5 MEAN QNH PRESSURE IN HPA 1019.3 1021.0 1015.3 1018.7 1017.4 1012.7 1013.5 1013.9 1016.1 1021.3 1021.7 1019.2 1017.5 MAX. QNH PRESSURE IN HPA 1027.1 1029.3 1021.1 1022.7 1022.9 1016.3 1018.5 1018.8 1027.2 1028.3 1026.3 1023.6 1029.3 DAY 22 4 8 11 1 2 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA 1010.0 1009.4 1004.7 1011.5 1012.2 1007.3 1008.2 1007.3 1009.3 1013.0 1017.4 1010.9 1004.7 DAY 17 23 30 29 31 10 6 2 12 2 20 5 MEAN QFF PRESSURE IN HPA 1023.0 1024.3 1013.2 1012.6 1009.4 1001.4 1001.2 1002.1 1006.7 1014.4 1018.9 1019.1 1012.2 MAX. QFF PRESSURE IN HPA 1032.2 1034.6 1019.7 1020.3 1018.4 1006.8 1006.5 1008.6 1021.4 1023.7 1024.8 1025.2 1034.6 DAY 30 4 12 2 1 2 20 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1013.1 1010.7 1002.9 1002.9 1001.3 996.0 995.2 995.5 998.5 1005.6 1014.4 1010.7 995.2 DAY 17 23 29 29 31 30 7 2 12 2 20 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.0 883.0 877.7 880.7 879.3 875.2 875.7 876.3 878.3 882.5 882.8 880.8 879.4 MAX. QFE PRESSURE IN HPA 887.8 890.0 883.3 884.3 883.5 878.1 879.8 880.4 887.9 888.5 886.9 886.3 890.0 DAY 22 4 8 9 1 2 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA 873.2 872.8 868.3 874.4 874.1 870.8 871.3 870.4 872.4 876.2 878.8 873.2 868.3 DAY 17 23 29 29 31 10 6 1 12 2 16 5 MEAN QNH PRESSURE IN HPA 1018.4 1020.6 1014.7 1018.0 1016.5 1011.9 1012.5 1013.1 1015.3 1020.1 1020.5 1018.2 1016.6 MAX. QNH PRESSURE IN HPA 1026.0 1028.5 1021.0 1022.1 1021.2 1015.1 1017.0 1017.7 1026.2 1026.8 1025.0 1024.4 1028.5 DAY 22 4 8 9 1 2 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA 1009.6 1009.2 1004.1 1011.0 1010.6 1006.9 1007.5 1006.5 1008.7 1013.0 1015.9 1009.6 1004.1 DAY 17 23 29 29 31 10 6 1 12 2 16 5 MEAN QFF PRESSURE IN HPA 1021.3 1023.1 1012.2 1011.6 1008.2 1000.4 999.7 1000.8 1005.5 1012.8 1016.9 1017.5 1010.8 MAX. QFF PRESSURE IN HPA 1030.6 1032.9 1019.0 1018.9 1015.9 1005.2 1004.8 1006.7 1019.7 1022.2 1022.3 1024.7 1032.9 DAY 30 4 12 2 1 2 20 19 23 24 9 18 MIN. QFF PRESSURE IN HPA 1012.4 1009.1 1002.3 1003.2 999.2 995.0 994.2 994.5 997.3 1005.0 1012.1 1009.0 994.2 DAY 17 23 27 29 31 30 6 1 12 2 16 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 879.7 881.8 876.4 879.0 878.0 873.8 874.1 874.6 876.6 881.2 881.7 879.9 878.1 MAX. QFE PRESSURE IN HPA 885.8 888.5 882.7 882.9 881.9 876.7 878.1 878.5 886.3 886.7 885.7 885.4 888.5 DAY 30 4 8 8 1 2 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA 872.6 872.3 867.3 874.5 872.1 869.0 870.2 868.7 871.0 875.2 877.5 874.6 867.3 DAY 17 23 29 29 31 10 5 1 12 2 24 5 MEAN QNH PRESSURE IN HPA 1017.0 1019.3 1013.3 1016.1 1015.0 1010.3 1010.7 1011.1 1013.5 1018.6 1019.2 1017.1 1015.1 MAX. QNH PRESSURE IN HPA 1023.8 1026.8 1020.3 1020.5 1019.4 1013.6 1015.1 1015.6 1024.4 1024.8 1023.7 1023.3 1026.8 DAY 30 4 8 8 1 2 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA 1008.9 1008.6 1003.0 1011.1 1008.4 1004.9 1006.3 1004.6 1007.2 1011.9 1014.5 1011.2 1003.0 DAY 17 23 29 29 31 10 5 1 12 2 24 5 MEAN QFF PRESSURE IN HPA 1020.0 1021.9 1010.8 1009.9 1006.8 998.9 998.0 999.0 1003.6 1011.3 1015.9 1016.5 1009.4 MAX. QFF PRESSURE IN HPA 1029.2 1031.3 1017.6 1016.4 1013.9 1003.5 1002.7 1004.8 1017.9 1020.5 1020.7 1023.8 1031.3 DAY 30 4 8 2 1 2 20 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1011.1 1008.5 1000.9 1004.3 997.0 993.4 993.0 992.7 996.1 1004.1 1011.1 1010.4 992.7 DAY 2 23 27 29 31 30 6 1 11 2 16 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 880.3 882.1 876.3 878.7 877.5 873.0 873.5 874.0 876.2 881.3 882.2 880.5 878.0 MAX. QFE PRESSURE IN HPA 886.6 888.2 881.9 882.6 881.3 876.1 877.2 878.1 886.2 886.9 885.9 887.0 888.2 DAY 30 4 8 8 1 14 20 19 23 24 8 18 MIN. QFE PRESSURE IN HPA 873.6 873.8 865.8 874.8 869.8 867.9 869.0 867.7 870.4 875.1 877.7 876.5 865.8 DAY 17 23 29 29 31 10 5 1 13 2 24 4 MEAN QNH PRESSURE IN HPA 1017.6 1019.7 1013.1 1015.9 1014.4 1009.4 1009.9 1010.5 1013.1 1018.7 1019.7 1017.8 1015.0 MAX. QNH PRESSURE IN HPA 1024.7 1026.5 1019.4 1020.2 1018.7 1012.9 1014.1 1015.1 1024.2 1025.0 1023.9 1025.1 1026.5 DAY 30 4 8 8 1 14 20 19 23 24 8 18 MIN. QNH PRESSURE IN HPA 1010.1 1010.3 1001.3 1011.4 1005.8 1003.7 1004.9 1003.4 1006.5 1011.8 1014.7 1013.3 1001.3 DAY 17 23 29 29 31 10 5 1 13 2 24 4 MEAN QFF PRESSURE IN HPA 1021.6 1023.2 1011.4 1010.4 1006.9 998.4 997.8 999.2 1004.4 1012.8 1017.6 1018.0 1010.1 MAX. QFF PRESSURE IN HPA 1031.1 1032.0 1018.0 1016.7 1015.0 1003.5 1002.5 1005.4 1019.1 1022.0 1023.9 1026.9 1032.0 DAY 30 4 12 2 1 13 20 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1013.3 1011.4 999.8 1004.6 995.3 992.9 992.4 992.3 997.0 1004.4 1013.1 1012.5 992.3 DAY 2 23 29 29 31 30 6 1 11 1 15 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 880.9 882.7 877.1 879.9 878.4 873.7 874.3 874.9 877.0 882.1 882.8 881.1 878.7 MAX. QFE PRESSURE IN HPA 887.3 889.2 882.7 884.1 881.9 877.4 878.2 879.2 887.1 887.7 886.8 887.6 889.2 DAY 21 3 8 8 1 3 20 19 23 24 8 18 MIN. QFE PRESSURE IN HPA 874.8 874.3 867.3 876.3 870.5 869.5 869.7 868.4 871.4 875.5 877.8 875.8 867.3 DAY 17 22 29 29 31 10 6 1 12 1 24 4 MEAN QNH PRESSURE IN HPA 1018.3 1020.3 1014.0 1017.1 1015.5 1010.2 1010.9 1011.6 1013.9 1019.7 1020.4 1018.5 1015.9 MAX. QNH PRESSURE IN HPA 1025.5 1027.6 1020.3 1021.9 1019.4 1014.4 1015.3 1016.4 1025.3 1025.9 1024.9 1025.8 1027.6 DAY 21 3 8 8 1 3 20 19 23 24 8 18 MIN. QNH PRESSURE IN HPA 1011.4 1010.9 1003.0 1013.1 1006.6 1005.5 1005.7 1004.2 1007.6 1012.2 1014.8 1012.6 1003.0 DAY 17 22 29 29 31 10 6 1 12 1 24 4 MEAN QFF PRESSURE IN HPA 1022.1 1023.4 1011.8 1011.0 1007.5 999.0 998.6 999.8 1004.6 1012.9 1017.5 1018.4 1010.6 MAX. QFF PRESSURE IN HPA 1031.6 1032.9 1018.1 1016.9 1015.2 1003.9 1003.7 1006.4 1019.4 1022.3 1023.3 1027.0 1032.9 DAY 30 3 7 1 1 3 22 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1013.5 1011.6 1000.7 1005.5 995.1 993.2 992.8 992.4 997.1 1004.7 1012.5 1011.9 992.4 DAY 2 22 29 28 31 30 6 1 11 1 19 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 880.8 882.7 877.3 880.1 878.6 874.1 874.6 875.2 877.3 882.3 882.7 881.0 878.9 MAX. QFE PRESSURE IN HPA 887.8 889.2 883.7 883.9 882.6 877.4 878.8 879.1 887.2 887.9 886.8 886.9 889.2 DAY 21 3 7 8 14 3 19 19 23 24 8 18 MIN. QFE PRESSURE IN HPA 874.8 874.1 867.3 876.7 871.5 869.8 869.9 868.6 871.6 875.9 877.6 873.9 867.3 DAY 17 22 29 29 31 10 6 1 12 1 24 4 MEAN QNH PRESSURE IN HPA 1018.2 1020.3 1014.2 1017.4 1015.7 1010.7 1011.2 1011.8 1014.2 1019.8 1020.3 1018.4 1016.0 MAX. QNH PRESSURE IN HPA 1026.0 1027.6 1021.4 1021.7 1020.2 1014.4 1015.9 1016.3 1025.4 1026.2 1024.9 1025.0 1027.6 DAY 21 3 7 8 14 3 19 19 23 24 8 18 MIN. QNH PRESSURE IN HPA 1011.4 1010.6 1003.0 1013.6 1007.7 1005.8 1005.9 1004.4 1007.8 1012.7 1014.6 1010.4 1003.0 DAY 17 22 29 29 31 10 6 1 12 1 24 4 MEAN QFF PRESSURE IN HPA 1021.2 1022.7 1011.6 1010.9 1007.3 999.2 998.6 999.7 1004.5 1012.6 1016.8 1017.7 1010.2 MAX. QFF PRESSURE IN HPA 1030.8 1032.2 1018.4 1016.4 1014.9 1003.7 1003.6 1005.3 1019.0 1021.7 1022.0 1025.0 1032.2 DAY 29 3 7 1 1 7 22 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1011.7 1010.0 1001.3 1005.2 995.9 994.0 992.9 992.4 996.9 1004.6 1011.3 1009.5 992.4 DAY 2 22 29 28 31 30 6 1 11 1 24 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.3 4.9 11.0 16.9 24.7 30.2 31.4 31.2 28.4 19.1 14.2 6.5 18.4 MINIMUN AIR TEMPERATURE (C) -0.9 0.3 5.4 10.6 18.0 23.4 25.1 24.7 22.8 13.5 9.6 3.0 13.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 7 27 29 31 28 0 0 0 122 DAYS WITH MINIMUM TEMP. <=-4 7 0 0 0 0 0 0 0 0 0 0 4 11 DAYS WITH FREEZING MIN.<= 0 21 15 5 0 0 0 0 0 0 0 0 10 51 TEMPERATURE RECORDS LOWEST(C) -7.0 -3.0 -1.5 5.5 12.0 19.0 20.0 21.0 20.5 9.0 3.0 -6.5 -7.0 DAY 12 1 20 5 14 7 5 30 30 15 14 28 MAXIMUM AIR TEMPERATURE (C) 6.1 9.1 16.3 22.4 30.3 35.8 36.8 37.0 34.7 24.6 19.7 11.2 23.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 15 30 31 31 30 1 0 0 142 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 11.5 15.5 21.5 31.0 36.0 39.0 41.5 40.5 37.5 31.0 25.0 20.5 41.5 DAY 5 19 5 27 25 29 28 5 13 1 6 7 DIF. BETWEEN (MAX.-MIN.) (C) 7.0 8.8 10.9 11.8 12.3 12.4 11.7 12.3 11.9 11.1 10.1 8.2 10.7 MEAN DAILY TEMP. (MDT) (C) 2.6 4.7 10.8 16.5 24.2 29.6 31.0 30.8 28.7 19.0 14.6 7.1 18.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 13.0 105.5 258.2 308.5 304.7 232.0 16.0 0.0 0.0 1238.0 HEATING DEG. DAYS(BASE 18 0C) 462.4 372.4 222.2 79.0 0.3 0.0 0.0 0.0 0.0 31.7 107.0 338.7 1613.8 DEWPOINT (MEAN C) -3.7 -2.6 -0.7 2.0 7.1 8.5 12.1 12.6 10.7 7.3 3.2 -0.8 4.6 MIXING RATIO (G/KG) 3.41 3.70 4.31 5.25 7.46 8.29 10.38 10.67 9.63 7.45 5.61 4.28 6.70 VAPOUR PRESSURE (HPA) 4.80 5.20 6.06 7.34 10.39 11.49 14.34 14.75 13.36 10.43 7.89 6.03 9.34 SATURATION DEF. (HPA) 2.57 3.70 7.61 12.90 21.78 32.44 32.70 31.57 26.35 12.38 8.87 4.27 16.43 RELATIVE HUMIDITY (MEAN %) 66 62 48 40 34 27 32 33 34 48 48 62 45 RELATIVE HUMIDITY (MAX. %) 83 77 65 58 49 40 44 46 49 65 62 78 60 RELATIVE HUMIDITY (MIN. %) 50 49 33 27 24 19 23 24 27 35 37 48 33 RELATIVE HUMIDITY (MEAN% 03UTC) 71 70 57 52 41 34 42 42 37 56 52 67 52 RELATIVE HUMIDITY (MEAN% 09UTC) 58 57 39 33 29 23 28 28 30 41 39 51 38 RELATIVE HUMIDITY (MEAN% 15UTC) 67 59 45 33 30 24 28 28 41 51 54 64 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.2 56.0 8.9 18.6 6.4 0.0 0.0 0.0 0.0 10.5 4.8 37.8 173.2 DAYS WITH PRECIPITATION >=10 1 2 0 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 2 4 0 1 0 0 0 0 0 1 0 2 10 DAYS WITH PRECIPITATION >= 1 6 7 3 6 2 0 0 0 0 3 1 5 33 DAYS WITH PRECIPITATION 14 12 10 7 3 0 2 0 0 9 2 6 65 GREATEST DAILY PRECIPITATION 10.1 20.8 3.1 7.0 3.0 0.0 0.0 0.0 0.0 5.0 4.4 26.0 26.0 DAY 10 10 17 2 12 ** ** ** ** 28 12 25 DAY WITH THUNDER STORM 0 0 0 1 1 0 0 0 0 2 0 0 4 DAYS WITH SNOW OR SLEET 9 8 3 0 0 0 0 0 0 0 0 4 24 DAYS WITH DUST 0 0 1 2 6 5 2 0 0 4 0 0 20 WIND DIRECTION (PREVAILING) 45 45 45 225 225 225 225 225 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 5.5 5.8 6.6 9.5 8.7 6.8 6.4 6.0 5.6 6.2 5.9 5.7 6.0 PREVAILING WIND PERCENT 16.5 11.6 13.7 16.3 19.8 15.8 17.3 14.5 26.7 21.8 26.7 14.1 16.9 CALMS PERCENT OF WIND 58.9 69.2 48.8 42.1 39.5 47.5 49.6 60.5 53.8 46.8 48.8 66.1 52.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 120 120 185 261 242 219 206 214 51 293 53 73 231 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.2 0.3 1.9 2.1 1.2 0.7 0.4 0.8 0.2 1.0 0.2 0.3 WIND STEADINESES (MEAN %) 13.6 11.1 8.6 38.0 43.7 36.4 21.2 17.4 30.8 5.4 33.3 10.5 9.7 WIND SPEED (MEAN KNOTS) 2.2 1.8 3.5 5.0 4.8 3.3 3.3 2.3 2.6 3.7 3.0 1.9 3.1 FASTEST WIND DIRECTION 240 240 50 280 240 290 330 150 200 280 240 260 240 FASTEST WIND SPEED (KNOTS) 16 16 21 27 31 21 16 12 10 23 17 23 31 DAY 23 20 16 13 12 15 6 6 5 24 13 18 DAYS WITH SKY CLEAR (0-2)/8 8 9 15 15 23 26 17 27 30 19 22 16 227 DAYS WITH P.CLOUDY (3-6)/8 12 10 10 10 6 4 14 4 0 9 6 11 96 DAYS WITH CLOUDY (7-8)/8 11 9 6 5 2 0 0 0 0 3 2 4 42 DAYS WITH VISIBILITY =< 2 KM 5 5 1 0 0 0 0 0 0 1 0 2 14 DURATION OF SUNSHINE HOURS 93.1 137.6 201.2 258.8 315.4 324.1 300.2 324.1 305.2 260.1 233.7 168.5 2922.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 882.0 878.7 881.8 877.2 877.2 874.4 874.4 875.2 877.6 882.6 883.9 882.7 879.0 MAX. QFE PRESSURE IN HPA 890.3 888.7 891.7 884.0 884.1 882.5 881.0 880.3 882.6 892.3 892.5 891.5 892.5 DAY-HOUR 26-18 8- 6 10- 6 24- 6 16- 6 1- 6 17- 6 3- 6 16- 6 19- 6 22- 6 28- 6 MIN. QFE PRESSURE IN HPA 873.7 867.8 874.1 867.3 867.6 867.6 868.7 869.4 872.3 875.7 875.2 873.8 867.3 DAY-HOUR 23- 3 15-15 24-12 15-15 13- 0 26-15 4-15 8-15 1-15 1-15 1- 3 25-12 MEAN QNH PRESSURE IN HPA 1019.5 1015.8 1019.3 1014.1 1014.1 1011.0 1011.0 1011.9 1014.5 1020.2 1021.7 1020.3 1016.1 MAX. QNH PRESSURE IN HPA 1028.9 1027.1 1030.4 1021.8 1021.9 1020.1 1018.4 1017.6 1020.2 1031.1 1031.3 1030.2 1031.3 DAY-HOUR 26-18 8- 6 10- 6 24- 6 16- 6 1- 6 17- 6 3- 6 16- 6 19- 6 22- 6 28- 6 MIN. QNH PRESSURE IN HPA 1010.2 1003.5 1010.6 1003.0 1003.3 1003.3 1004.6 1005.3 1008.6 1012.4 1011.9 1010.3 1003.0 DAY-HOUR 23- 3 15-15 24-12 15-15 13- 0 26-15 4-15 8-15 1-15 1-15 1- 3 25-12 MEAN QFF PRESSURE IN HPA 1022.1 1016.9 1017.3 1009.0 1005.1 999.4 998.7 999.7 1003.7 1014.0 1018.0 1020.6 1010.4 MAX. QFF PRESSURE IN HPA 1033.1 1029.8 1030.8 1018.2 1014.8 1010.5 1005.8 1006.6 1010.4 1027.9 1030.0 1036.8 1036.8 DAY-HOUR 26-18 8- 6 17- 6 3-18 15- 6 1- 3 17- 6 29- 6 28- 6 19- 6 14- 6 28- 6 MIN. QFF PRESSURE IN HPA 1010.0 1003.4 1005.7 997.0 993.5 990.9 992.8 992.6 997.2 1002.5 1007.2 1011.5 990.9 DAY-HOUR 23- 3 15-15 24-12 15-15 12- 9 26-15 28-12 8-15 1-15 1-12 1-12 18-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 881.7 878.6 881.8 877.0 877.0 874.5 874.3 875.1 877.3 882.5 883.7 882.7 878.8 MAX. QFE PRESSURE IN HPA 889.2 887.7 889.8 882.6 882.9 880.9 877.6 878.4 881.0 890.9 891.5 890.0 891.5 DAY 27 8 10 25 16 1 17 3 28 19 23 28 MIN. QFE PRESSURE IN HPA 875.4 868.5 875.5 869.3 867.6 868.3 870.2 871.5 873.5 876.3 875.7 874.9 867.6 DAY 18 16 25 16 13 27 4 9 2 1 1 25 MEAN QNH PRESSURE IN HPA 1019.2 1015.7 1019.3 1014.0 1013.9 1011.1 1010.8 1011.7 1014.2 1020.1 1021.5 1020.3 1016.0 MAX. QNH PRESSURE IN HPA 1027.6 1025.9 1028.3 1020.2 1020.5 1018.3 1014.6 1015.5 1018.4 1029.5 1030.2 1028.5 1030.2 DAY 27 8 10 25 16 1 17 3 28 19 23 28 MIN. QNH PRESSURE IN HPA 1012.1 1004.3 1012.2 1005.2 1003.3 1004.1 1006.3 1007.7 1010.0 1013.1 1012.4 1011.5 1003.3 DAY 18 16 25 16 13 27 4 9 2 1 1 25 MEAN QFF PRESSURE IN HPA 1021.4 1016.6 1017.1 1008.8 1004.8 999.5 998.5 999.3 1003.1 1013.4 1017.4 1020.2 1010.0 MAX. QFF PRESSURE IN HPA 1030.7 1028.3 1029.4 1013.8 1013.0 1008.8 1002.7 1004.8 1008.2 1025.7 1026.7 1033.8 1033.8 DAY 27 8 21 8 16 1 9 31 28 19 23 28 MIN. QFF PRESSURE IN HPA 1012.2 1005.1 1007.7 999.1 996.4 991.3 993.9 995.1 998.2 1002.7 1007.2 1013.0 991.3 DAY 23 16 25 16 13 27 28 9 2 1 1 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 881.6 878.6 882.1 877.7 877.8 875.4 875.3 876.0 878.1 883.0 883.9 882.7 879.3 MAX. QFE PRESSURE IN HPA 888.5 887.5 890.6 883.0 883.7 882.0 879.7 879.4 882.0 891.0 891.8 890.0 891.8 DAY 26 8 10 25 16 1 17 3 24 19 23 28 MIN. QFE PRESSURE IN HPA 873.7 868.0 875.5 870.7 868.8 868.9 870.8 872.3 875.4 876.7 875.2 873.9 868.0 DAY 23 16 25 16 13 27 4 8 2 1 1 25 MEAN QNH PRESSURE IN HPA 1019.1 1015.7 1019.6 1014.6 1014.8 1012.1 1012.0 1012.8 1015.2 1020.6 1021.7 1020.3 1016.5 MAX. QNH PRESSURE IN HPA 1026.8 1025.7 1029.2 1020.6 1021.4 1019.5 1016.9 1016.6 1019.5 1029.6 1030.5 1028.5 1030.5 DAY 26 8 10 25 16 1 17 3 24 19 23 28 MIN. QNH PRESSURE IN HPA 1010.2 1003.8 1012.2 1006.8 1004.7 1004.8 1006.9 1008.6 1012.1 1013.6 1011.9 1010.4 1003.8 DAY 23 16 25 16 13 27 4 8 2 1 1 25 MEAN QFF PRESSURE IN HPA 1022.0 1017.3 1018.1 1010.2 1006.3 1001.0 1000.2 1001.1 1005.2 1015.2 1018.8 1021.1 1011.4 MAX. QFF PRESSURE IN HPA 1031.8 1028.9 1030.4 1016.2 1014.7 1010.5 1004.6 1005.7 1009.7 1026.7 1028.9 1035.1 1035.1 DAY 12 8 21 8 15 1 9 29 24 19 23 28 MIN. QFF PRESSURE IN HPA 1010.0 1004.6 1008.6 1002.0 998.0 992.6 995.5 996.4 1001.2 1005.3 1007.5 1013.0 992.6 DAY 23 16 25 16 12 27 28 8 13 1 1 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 883.0 879.8 883.0 878.4 878.5 876.0 875.9 876.9 879.1 884.1 885.0 883.7 880.3 MAX. QFE PRESSURE IN HPA 889.9 888.7 891.7 884.0 884.1 882.5 881.0 880.3 882.6 892.3 892.5 891.5 892.5 DAY 26 8 10 24 16 1 17 3 16 19 22 28 MIN. QFE PRESSURE IN HPA 877.3 869.6 877.6 870.6 868.8 869.6 871.3 873.2 875.6 877.4 876.8 874.7 868.8 DAY 23 16 25 16 13 27 4 8 5 14 1 25 MEAN QNH PRESSURE IN HPA 1020.7 1017.0 1020.7 1015.5 1015.6 1012.8 1012.6 1013.8 1016.3 1021.9 1022.9 1021.5 1017.6 MAX. QNH PRESSURE IN HPA 1028.4 1027.1 1030.4 1021.8 1021.9 1020.1 1018.4 1017.6 1020.2 1031.1 1031.3 1030.2 1031.3 DAY 26 8 10 24 16 1 17 3 16 19 22 28 MIN. QNH PRESSURE IN HPA 1014.2 1005.6 1014.6 1006.7 1004.7 1005.6 1007.5 1009.6 1012.3 1014.4 1013.7 1011.3 1004.7 DAY 23 16 25 16 13 27 4 8 5 14 1 25 MEAN QFF PRESSURE IN HPA 1023.5 1018.4 1018.8 1010.3 1006.6 1001.3 1000.4 1001.8 1005.5 1015.7 1019.3 1021.9 1012.0 MAX. QFF PRESSURE IN HPA 1033.0 1029.8 1030.8 1017.4 1014.8 1010.4 1005.8 1006.6 1010.4 1027.9 1030.0 1036.8 1036.8 DAY 12 8 17 8 15 1 17 29 28 19 14 28 MIN. QFF PRESSURE IN HPA 1015.1 1006.6 1011.2 1000.9 997.0 992.7 995.5 997.3 1001.6 1006.2 1008.7 1014.5 992.7 DAY 23 16 25 16 12 27 28 8 5 1 1 25 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 882.2 879.2 882.3 877.6 877.8 875.3 875.0 876.2 878.4 883.1 884.2 882.9 879.5 MAX. QFE PRESSURE IN HPA 889.3 888.1 890.5 883.3 883.9 881.2 879.4 879.5 881.8 891.1 891.9 891.3 891.9 DAY 26 8 10 24 16 1 17 2 24 19 22 28 MIN. QFE PRESSURE IN HPA 875.8 870.7 877.2 870.2 868.5 869.4 871.0 872.5 875.0 876.5 876.2 874.1 868.5 DAY 23 16 14 16 12 27 4 8 5 14 1 25 MEAN QNH PRESSURE IN HPA 1019.8 1016.4 1019.8 1014.6 1014.8 1012.0 1011.7 1013.0 1015.5 1020.7 1022.0 1020.5 1016.7 MAX. QNH PRESSURE IN HPA 1027.7 1026.4 1029.1 1021.0 1021.7 1018.6 1016.6 1016.7 1019.3 1029.8 1030.7 1030.0 1030.7 DAY 26 8 10 24 16 1 17 2 24 19 22 28 MIN. QNH PRESSURE IN HPA 1012.6 1006.8 1014.1 1006.3 1004.3 1005.3 1007.2 1008.8 1011.6 1013.3 1013.0 1010.6 1004.3 DAY 23 16 14 16 12 27 4 8 5 14 1 25 MEAN QFF PRESSURE IN HPA 1022.1 1017.2 1017.5 1009.1 1005.6 1000.2 999.1 1000.5 1004.2 1014.0 1017.7 1020.4 1010.6 MAX. QFF PRESSURE IN HPA 1031.7 1028.2 1030.1 1015.8 1014.4 1008.9 1003.9 1005.7 1008.8 1025.7 1028.8 1035.2 1035.2 DAY 12 8 17 8 15 1 17 30 26 19 14 28 MIN. QFF PRESSURE IN HPA 1013.1 1007.3 1009.9 1000.1 993.5 992.0 994.1 996.0 1000.1 1004.4 1007.4 1013.2 992.0 DAY 23 16 14 16 12 27 28 8 1 1 1 18 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 881.2 878.0 880.8 876.2 876.3 873.7 873.6 874.4 876.8 881.7 883.1 881.8 878.1 MAX. QFE PRESSURE IN HPA 888.9 886.9 887.9 882.1 882.0 878.7 877.3 877.8 880.4 889.4 890.7 889.8 890.7 DAY 26 8 10 24 16 1 17 2 27 19 22 28 MIN. QFE PRESSURE IN HPA 874.8 870.5 874.1 868.4 869.0 868.4 869.2 870.6 873.4 875.7 875.9 873.8 868.4 DAY 17 15 24 15 12 27 4 8 5 14 1 25 MEAN QNH PRESSURE IN HPA 1018.6 1015.0 1018.2 1013.0 1013.2 1010.2 1010.0 1011.0 1013.6 1019.2 1020.8 1019.3 1015.2 MAX. QNH PRESSURE IN HPA 1027.3 1025.0 1026.2 1019.6 1019.5 1015.8 1014.2 1014.8 1017.7 1027.8 1029.3 1028.3 1029.3 DAY 26 8 10 24 16 1 17 2 27 19 22 28 MIN. QNH PRESSURE IN HPA 1011.4 1006.6 1010.6 1004.2 1004.9 1004.2 1005.1 1006.7 1009.8 1012.4 1012.7 1010.3 1004.2 DAY 17 15 24 15 12 27 4 8 5 14 1 25 MEAN QFF PRESSURE IN HPA 1020.8 1015.8 1015.9 1007.8 1004.0 998.6 997.6 998.5 1002.3 1012.5 1016.6 1019.3 1009.1 MAX. QFF PRESSURE IN HPA 1030.7 1027.5 1027.8 1015.9 1012.3 1005.7 1001.8 1003.2 1007.2 1024.1 1027.2 1033.2 1033.2 DAY 12 8 17 8 15 1 9 29 27 19 14 28 MIN. QFF PRESSURE IN HPA 1012.5 1005.7 1005.7 997.6 996.2 991.2 992.8 993.7 998.2 1002.5 1007.2 1011.5 991.2 DAY 23 19 24 15 12 27 28 8 1 1 1 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 881.6 878.1 880.9 876.0 876.1 872.8 873.0 873.8 876.4 881.8 883.5 882.2 878.0 MAX. QFE PRESSURE IN HPA 889.3 886.6 887.8 881.6 881.6 877.6 876.6 877.5 880.7 889.3 891.9 890.0 891.9 DAY 26 7 10 3 15 1 17 2 27 15 22 28 MIN. QFE PRESSURE IN HPA 875.2 867.8 874.1 867.3 871.0 867.6 868.7 869.4 872.3 875.7 876.0 874.5 867.3 DAY 17 15 24 15 13 26 4 8 1 1 1 25 MEAN QNH PRESSURE IN HPA 1019.1 1015.2 1018.3 1012.8 1012.9 1009.2 1009.4 1010.3 1013.2 1019.3 1021.3 1019.7 1015.1 MAX. QNH PRESSURE IN HPA 1027.7 1024.7 1026.0 1019.1 1019.1 1014.6 1013.5 1014.5 1018.1 1027.7 1030.7 1028.5 1030.7 DAY 26 7 10 3 15 1 17 2 27 15 22 28 MIN. QNH PRESSURE IN HPA 1011.9 1003.5 1010.6 1003.0 1007.2 1003.3 1004.6 1005.3 1008.6 1012.4 1012.8 1011.1 1003.0 DAY 17 15 24 15 13 26 4 8 1 1 1 25 MEAN QFF PRESSURE IN HPA 1022.0 1016.6 1016.7 1008.2 1004.2 997.9 997.5 998.6 1002.9 1013.8 1018.3 1020.6 1009.8 MAX. QFF PRESSURE IN HPA 1032.2 1027.8 1028.0 1017.4 1012.7 1005.1 1001.0 1003.6 1008.5 1024.6 1028.7 1035.1 1035.1 DAY 26 7 17 3 15 1 17 2 27 15 22 28 MIN. QFF PRESSURE IN HPA 1014.1 1003.4 1006.3 997.0 998.3 990.9 992.9 992.6 997.2 1004.1 1008.5 1012.5 990.9 DAY 4 15 24 15 25 26 2 8 1 1 1 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 882.2 878.8 881.8 877.2 876.9 873.5 874.0 874.6 877.1 882.5 884.0 882.8 878.8 MAX. QFE PRESSURE IN HPA 890.3 887.4 889.0 883.4 882.1 878.5 877.3 878.9 881.3 890.2 891.9 890.3 891.9 DAY 26 7 9 3 15 4 15 2 27 15 22 28 MIN. QFE PRESSURE IN HPA 875.2 870.3 874.9 869.1 870.2 868.1 869.2 870.3 873.2 876.2 876.4 875.2 868.1 DAY 17 15 24 15 12 26 4 8 1 1 1 25 MEAN QNH PRESSURE IN HPA 1019.8 1015.9 1019.3 1014.2 1013.7 1010.0 1010.5 1011.2 1014.1 1020.1 1021.8 1020.4 1015.9 MAX. QNH PRESSURE IN HPA 1028.9 1025.6 1027.4 1021.1 1019.6 1015.6 1014.2 1016.0 1018.7 1028.7 1030.7 1028.9 1030.7 DAY 26 7 9 3 15 4 15 2 27 15 22 28 MIN. QNH PRESSURE IN HPA 1011.9 1006.4 1011.5 1005.0 1006.3 1003.9 1005.1 1006.4 1009.6 1013.0 1013.2 1011.9 1003.9 DAY 17 15 24 15 12 26 4 8 1 1 1 25 MEAN QFF PRESSURE IN HPA 1022.6 1017.1 1017.3 1009.0 1004.7 998.5 998.4 999.2 1003.3 1013.9 1018.2 1021.0 1010.3 MAX. QFF PRESSURE IN HPA 1033.1 1028.3 1028.9 1018.2 1012.5 1005.3 1001.8 1004.6 1008.7 1024.8 1027.8 1035.0 1035.0 DAY 26 7 20 3 15 1 17 2 27 18 14 28 MIN. QFF PRESSURE IN HPA 1014.4 1005.5 1006.9 998.4 997.6 991.4 993.4 993.8 998.0 1004.5 1008.0 1011.9 991.4 DAY 4 19 24 15 12 27 2 8 1 1 1 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 882.3 878.7 882.0 877.3 877.0 873.9 874.2 874.9 877.3 882.5 884.2 883.0 878.9 MAX. QFE PRESSURE IN HPA 889.8 887.6 889.4 882.6 882.4 878.9 877.5 878.9 881.3 890.9 891.7 890.3 891.7 DAY 26 7 9 24 15 1 16 2 27 15 22 28 MIN. QFE PRESSURE IN HPA 875.2 869.0 874.7 869.4 870.2 868.3 870.0 870.8 873.3 876.5 877.0 876.5 868.3 DAY 17 15 24 15 12 26 3 8 1 31 1 25 MEAN QNH PRESSURE IN HPA 1019.8 1015.8 1019.5 1014.2 1013.9 1010.4 1010.8 1011.5 1014.2 1020.1 1022.0 1020.6 1016.1 MAX. QNH PRESSURE IN HPA 1028.3 1025.8 1027.8 1020.2 1020.0 1016.0 1014.5 1016.0 1018.7 1029.5 1030.4 1028.9 1030.4 DAY 26 7 9 24 15 1 16 2 27 15 22 28 MIN. QNH PRESSURE IN HPA 1011.9 1004.9 1011.3 1005.3 1006.3 1004.1 1006.0 1006.9 1009.7 1013.3 1013.9 1013.3 1004.1 DAY 17 15 24 15 12 26 3 8 1 31 1 25 MEAN QFF PRESSURE IN HPA 1022.2 1016.5 1017.1 1008.7 1004.7 998.7 998.3 999.1 1003.1 1013.5 1017.9 1020.6 1010.0 MAX. QFF PRESSURE IN HPA 1031.5 1027.9 1029.1 1015.9 1012.7 1006.4 1001.9 1004.4 1008.4 1024.8 1027.2 1033.5 1033.5 DAY 26 7 20 3 15 1 17 30 27 18 22 28 MIN. QFF PRESSURE IN HPA 1012.3 1005.5 1006.5 998.8 997.3 991.1 993.6 993.9 997.7 1004.6 1008.2 1011.5 991.1 DAY 1 19 24 15 12 26 2 8 1 1 1 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.9 4.1 9.5 18.3 21.4 27.7 31.1 30.3 25.8 19.4 12.6 5.3 17.5 MINIMUN AIR TEMPERATURE (C) 0.4 0.5 5.6 12.9 15.9 21.3 25.4 24.4 19.9 14.8 8.2 2.0 12.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 17 31 29 12 0 0 0 90 DAYS WITH MINIMUM TEMP. <=-4 0 3 1 0 0 0 0 0 0 0 0 0 4 DAYS WITH FREEZING MIN.<= 0 14 14 1 0 0 0 0 0 0 0 0 16 45 TEMPERATURE RECORDS LOWEST(C) -3.0 -6.0 -4.5 6.0 9.5 18.0 22.0 20.0 13.0 13.0 4.0 -2.0 -6.0 DAY 6 13 11 13 6 6 12 13 28 13 28 20 MAXIMUM AIR TEMPERATURE (C) 7.9 8.7 14.0 23.3 26.8 33.2 36.4 35.7 31.7 24.6 17.4 9.1 22.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 3 29 31 31 21 0 0 0 116 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 11.8 15.0 22.0 30.0 32.0 37.5 39.5 40.5 37.4 27.5 25.0 15.0 40.5 DAY 31 20 30 25 30 28 7 6 3 6 3 10 DIF. BETWEEN (MAX.-MIN.) (C) 7.5 8.2 8.4 10.4 10.9 11.9 11.0 11.3 11.8 9.8 9.2 7.1 9.8 MEAN DAILY TEMP. (MDT) (C) 4.1 4.6 9.8 18.1 21.3 27.2 30.9 30.0 25.8 19.7 12.8 5.5 17.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 15.7 42.1 186.8 307.1 280.3 152.8 2.4 0.0 0.0 987.4 HEATING DEG. DAYS(BASE 18 0C) 430.2 376.0 254.4 48.3 9.0 0.0 0.0 0.0 0.0 4.5 161.8 386.3 1670.6 DEWPOINT (MEAN C) -1.3 -3.4 2.0 5.1 5.0 8.4 12.1 11.9 7.8 6.3 1.7 -2.3 4.4 MIXING RATIO (G/KG) 4.03 3.54 5.34 6.51 6.51 8.14 10.41 10.33 7.90 6.95 5.02 3.85 6.54 VAPOUR PRESSURE (HPA) 5.67 4.99 7.47 9.09 9.07 11.30 14.37 14.29 11.02 9.76 7.08 5.41 9.13 SATURATION DEF. (HPA) 2.54 3.57 4.87 12.89 17.19 26.75 31.69 29.86 23.68 13.25 8.00 3.78 14.84 RELATIVE HUMIDITY (MEAN %) 71 61 63 44 38 32 33 34 34 44 49 60 47 RELATIVE HUMIDITY (MAX. %) 84 79 79 59 53 46 43 47 46 55 62 79 61 RELATIVE HUMIDITY (MIN. %) 55 41 45 32 25 21 24 25 24 32 37 41 34 RELATIVE HUMIDITY (MEAN% 03UTC) 78 67 70 54 47 43 39 39 40 51 56 64 54 RELATIVE HUMIDITY (MEAN% 09UTC) 60 55 55 39 32 26 28 28 28 37 42 50 40 RELATIVE HUMIDITY (MEAN% 15UTC) 70 59 60 40 30 24 28 32 35 47 52 62 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 27.4 27.2 102.6 18.1 6.2 1.2 0.0 0.0 0.0 2.0 0.0 57.2 241.9 DAYS WITH PRECIPITATION >=10 0 0 3 1 0 0 0 0 0 0 0 3 7 DAYS WITH PRECIPITATION >= 5 3 2 6 1 0 0 0 0 0 0 0 3 15 DAYS WITH PRECIPITATION >= 1 7 7 13 1 3 0 0 0 0 1 0 9 41 DAYS WITH PRECIPITATION 13 11 15 9 7 3 0 0 1 5 2 13 79 GREATEST DAILY PRECIPITATION 6.0 7.7 30.0 17.0 3.0 0.7 0.0 0.0 0.0 1.0 0.0 21.7 30.0 DAY 14 21 25 4 4 19 ** ** ** 22 ** 12 DAY WITH THUNDER STORM 1 0 3 3 1 1 0 0 0 2 0 1 12 DAYS WITH SNOW OR SLEET 3 5 0 0 0 0 0 0 0 0 0 3 11 DAYS WITH DUST 0 0 1 3 9 0 1 0 1 2 0 0 17 WIND DIRECTION (PREVAILING) 225 45 45 225 270 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 7.0 5.8 5.6 9.1 14.2 8.1 7.0 6.3 6.4 6.3 5.9 6.6 6.5 PREVAILING WIND PERCENT 8.5 16.5 11.3 18.3 23.0 17.1 17.7 21.0 25.8 30.2 20.8 18.1 17.5 CALMS PERCENT OF WIND 73.4 58.9 59.3 38.3 33.5 40.4 47.6 50.0 43.8 44.4 57.5 64.1 50.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 251 265 231 244 254 245 172 97 228 32 79 19 248 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.4 0.5 2.1 3.7 1.0 0.6 0.2 0.2 0.6 0.1 0.4 0.6 WIND STEADINESES (MEAN %) 17.6 15.4 20.0 38.2 55.2 19.2 16.2 6.5 4.9 16.2 3.7 15.4 16.2 WIND SPEED (MEAN KNOTS) 1.7 2.6 2.5 5.5 6.7 5.2 3.7 3.1 4.1 3.7 2.7 2.6 3.7 FASTEST WIND DIRECTION 240 320 270 240 270 270 40 70 270 260 270 280 270 FASTEST WIND SPEED (KNOTS) 19 19 23 23 23 21 16 14 19 17 17 19 23 DAY 5 4 7 19 22 8 4 12 24 10 19 15 DAYS WITH SKY CLEAR (0-2)/8 12 8 4 11 18 24 28 30 29 15 17 15 211 DAYS WITH P.CLOUDY (3-6)/8 10 9 12 15 10 6 3 1 1 14 11 6 98 DAYS WITH CLOUDY (7-8)/8 9 11 15 4 3 0 0 0 0 2 2 10 56 DAYS WITH VISIBILITY =< 2 KM 9 6 3 0 1 0 0 0 0 0 0 5 24 DURATION OF SUNSHINE HOURS 122.3 122.8 131.7 241.5 279.1 332.5 330.3 329.5 293.3 228.8 192.9 125.0 2729.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 881.6 881.6 878.8 879.0 875.9 875.5 873.5 875.3 879.8 883.3 884.1 880.7 879.1 MAX. QFE PRESSURE IN HPA 890.2 893.5 886.5 884.5 883.1 882.8 878.2 880.5 886.8 888.2 889.9 889.5 893.5 DAY-HOUR 12- 6 15- 6 12- 6 14- 6 25- 6 23- 6 12- 6 22- 6 27- 6 13- 6 24- 6 17- 6 MIN. QFE PRESSURE IN HPA 871.8 873.8 868.0 871.5 868.0 866.2 867.5 869.4 872.7 878.3 877.3 871.7 866.2 DAY-HOUR 25-12 4-12 6-21 4-15 22-15 11-15 14- 0 11-15 8-12 4-12 5-12 31-21 MEAN QNH PRESSURE IN HPA 1019.1 1019.1 1016.0 1016.1 1012.6 1012.2 1010.0 1012.0 1017.0 1020.9 1021.8 1018.0 1016.2 MAX. QNH PRESSURE IN HPA 1028.7 1032.5 1024.6 1022.3 1020.8 1020.4 1015.3 1017.8 1024.9 1026.5 1028.4 1028.0 1032.5 DAY-HOUR 12- 6 15- 6 12- 6 14- 6 25- 6 23- 6 12- 6 22- 6 27- 6 13- 6 24- 6 17- 6 MIN. QNH PRESSURE IN HPA 1008.1 1010.3 1003.8 1007.7 1003.8 1001.7 1003.2 1005.3 1009.1 1015.4 1014.2 1007.9 1001.7 DAY-HOUR 25-12 4-12 6-21 4-15 22-15 11-15 14- 0 11-15 8-12 4-12 5-12 31-21 MEAN QFF PRESSURE IN HPA 1020.8 1020.7 1014.5 1010.3 1005.3 1001.8 997.9 1000.2 1007.6 1014.6 1019.0 1018.9 1011.0 MAX. QFF PRESSURE IN HPA 1031.0 1036.5 1027.0 1020.5 1017.8 1010.5 1004.2 1007.3 1019.4 1020.3 1027.7 1031.0 1036.5 DAY-HOUR 12- 6 15- 6 12- 6 14- 6 25- 3 23- 3 12- 6 23- 3 27- 6 13- 6 24- 6 17- 6 MIN. QFF PRESSURE IN HPA 1008.7 1008.9 1003.2 1002.0 996.3 990.5 990.7 993.1 996.6 1008.4 1008.5 1008.2 990.5 DAY-HOUR 25-12 28-21 6-21 10- 0 22-15 11-15 7-15 6-15 8-12 4-21 5-12 1-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 881.6 881.5 878.5 878.8 875.8 875.5 873.5 875.2 879.6 883.2 884.0 880.7 879.0 MAX. QFE PRESSURE IN HPA 888.9 890.8 885.1 883.6 881.6 881.0 876.9 878.6 884.7 886.3 888.5 887.2 890.8 DAY 13 15 13 29 25 23 1 23 17 13 24 17 MIN. QFE PRESSURE IN HPA 872.2 874.3 868.0 871.7 868.5 867.3 867.5 870.3 873.9 879.3 878.3 873.8 867.3 DAY 26 21 7 5 23 12 14 12 8 5 6 26 MEAN QNH PRESSURE IN HPA 1019.1 1019.0 1015.6 1015.9 1012.6 1012.2 1010.0 1011.9 1016.8 1020.9 1021.8 1018.1 1016.1 MAX. QNH PRESSURE IN HPA 1027.3 1029.4 1023.0 1021.3 1019.1 1018.4 1013.8 1015.7 1022.6 1024.4 1026.8 1025.4 1029.4 DAY 13 15 13 29 25 23 1 23 17 13 24 17 MIN. QNH PRESSURE IN HPA 1008.5 1010.9 1003.8 1007.9 1004.3 1003.0 1003.2 1006.4 1010.4 1016.5 1015.4 1010.3 1003.0 DAY 26 21 7 5 23 12 14 12 8 5 6 26 MEAN QFF PRESSURE IN HPA 1020.6 1020.3 1014.0 1010.1 1005.2 1001.8 997.7 999.9 1007.1 1014.3 1018.6 1018.7 1010.7 MAX. QFF PRESSURE IN HPA 1028.6 1033.9 1023.8 1019.5 1015.7 1008.4 1002.3 1005.1 1016.6 1018.9 1025.6 1027.9 1033.9 DAY 13 15 12 14 25 23 12 28 27 17 24 17 MIN. QFF PRESSURE IN HPA 1009.5 1009.0 1003.8 1002.0 997.1 991.8 991.5 994.6 998.4 1009.4 1009.9 1010.9 991.5 DAY 26 21 7 10 23 12 14 12 8 5 6 2 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 881.6 881.5 878.8 879.4 876.4 876.2 874.3 875.9 880.2 883.6 884.3 880.8 879.4 MAX. QFE PRESSURE IN HPA 888.8 891.3 884.2 883.7 882.7 882.3 877.5 880.3 885.2 887.4 888.5 888.2 891.3 DAY 13 15 12 15 25 23 1 23 16 13 24 17 MIN. QFE PRESSURE IN HPA 872.2 874.3 868.4 871.9 868.8 867.3 868.4 871.0 874.0 880.1 878.5 875.0 867.3 DAY 26 21 7 10 23 12 14 12 8 5 5 26 MEAN QNH PRESSURE IN HPA 1019.1 1019.0 1016.0 1016.5 1013.2 1013.0 1010.9 1012.7 1017.5 1021.3 1022.2 1018.1 1016.6 MAX. QNH PRESSURE IN HPA 1027.2 1030.0 1022.0 1021.4 1020.3 1019.9 1014.5 1017.6 1023.1 1025.6 1026.8 1026.5 1030.0 DAY 13 15 12 15 25 23 1 23 16 13 24 17 MIN. QNH PRESSURE IN HPA 1008.5 1010.9 1004.2 1008.2 1004.7 1003.0 1004.2 1007.2 1010.5 1017.4 1015.6 1011.6 1003.0 DAY 26 21 7 10 23 12 14 12 8 5 5 26 MEAN QFF PRESSURE IN HPA 1021.2 1021.0 1014.9 1011.3 1006.2 1003.0 999.2 1001.5 1008.8 1015.7 1020.0 1019.4 1011.8 MAX. QFF PRESSURE IN HPA 1029.4 1034.8 1024.4 1020.1 1017.8 1010.5 1003.9 1007.3 1018.3 1020.1 1026.6 1030.0 1034.8 DAY 12 15 12 14 25 23 12 23 27 13 27 17 MIN. QFF PRESSURE IN HPA 1009.9 1009.7 1004.6 1002.2 997.8 992.5 992.8 995.3 999.4 1011.4 1010.6 1011.5 992.5 DAY 26 21 7 10 23 12 8 6 8 5 5 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 882.7 882.6 880.0 880.2 877.0 876.8 875.0 876.8 881.3 884.5 885.4 881.6 880.3 MAX. QFE PRESSURE IN HPA 890.2 893.5 886.5 884.5 883.1 882.8 878.2 880.5 886.8 888.2 889.9 889.5 893.5 DAY 12 15 12 14 25 23 12 22 27 13 24 17 MIN. QFE PRESSURE IN HPA 873.6 875.7 869.5 872.7 870.2 868.6 869.5 872.0 874.5 880.8 879.5 876.6 868.6 DAY 26 21 7 10 23 12 8 12 8 4 5 1 MEAN QNH PRESSURE IN HPA 1020.3 1020.2 1017.2 1017.5 1013.8 1013.7 1011.7 1013.6 1018.7 1022.3 1023.3 1019.1 1017.6 MAX. QNH PRESSURE IN HPA 1028.7 1032.5 1024.6 1022.3 1020.8 1020.4 1015.3 1017.8 1024.9 1026.5 1028.4 1028.0 1032.5 DAY 12 15 12 14 25 23 12 22 27 13 24 17 MIN. QNH PRESSURE IN HPA 1010.1 1012.4 1005.5 1009.1 1006.3 1004.4 1005.5 1008.3 1011.1 1018.2 1016.7 1013.5 1004.4 DAY 26 21 7 10 23 12 8 12 8 4 5 1 MEAN QFF PRESSURE IN HPA 1022.2 1022.0 1016.0 1011.6 1006.4 1003.3 999.7 1002.0 1009.1 1016.0 1020.5 1020.1 1012.4 MAX. QFF PRESSURE IN HPA 1031.0 1036.5 1027.0 1020.5 1017.5 1010.4 1004.2 1007.1 1019.4 1020.3 1027.7 1031.0 1036.5 DAY 12 15 12 14 25 23 12 22 27 13 24 17 MIN. QFF PRESSURE IN HPA 1011.1 1011.8 1005.2 1003.1 999.8 993.3 992.5 995.8 998.7 1011.5 1010.9 1012.0 992.5 DAY 26 28 7 10 23 12 8 6 8 4 5 1 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.7 882.0 879.4 879.5 876.4 876.2 874.3 876.0 880.5 883.6 884.3 880.8 879.6 MAX. QFE PRESSURE IN HPA 889.1 892.7 886.3 883.8 882.5 882.1 877.1 880.0 885.8 887.0 888.8 888.4 892.7 DAY 12 15 12 15 25 23 12 22 27 13 24 17 MIN. QFE PRESSURE IN HPA 873.1 875.2 869.7 872.6 870.9 868.5 868.8 871.2 874.0 879.8 878.1 876.1 868.5 DAY 25 4 7 10 23 12 8 12 8 4 5 1 MEAN QNH PRESSURE IN HPA 1019.2 1019.6 1016.6 1016.7 1013.2 1013.0 1010.8 1012.8 1017.9 1021.4 1022.1 1018.2 1016.8 MAX. QNH PRESSURE IN HPA 1027.5 1031.6 1024.4 1021.5 1020.1 1019.6 1014.0 1017.3 1023.8 1025.1 1027.2 1026.7 1031.6 DAY 12 15 12 15 25 23 12 22 27 13 24 17 MIN. QNH PRESSURE IN HPA 1009.5 1011.9 1005.7 1008.9 1007.0 1004.3 1004.7 1007.4 1010.5 1017.0 1015.1 1012.9 1004.3 DAY 25 4 7 10 23 12 8 12 8 4 5 1 MEAN QFF PRESSURE IN HPA 1020.6 1021.0 1015.0 1010.6 1005.5 1002.4 998.4 1000.7 1008.0 1014.6 1018.8 1018.7 1011.2 MAX. QFF PRESSURE IN HPA 1028.2 1034.7 1025.5 1019.1 1015.9 1009.0 1002.8 1006.1 1017.7 1018.3 1025.5 1029.2 1034.7 DAY 13 15 12 14 25 23 12 22 27 13 24 17 MIN. QFF PRESSURE IN HPA 1010.2 1010.6 1004.9 1003.1 999.5 993.2 991.3 994.6 998.1 1010.0 1009.1 1010.9 991.3 DAY 25 28 7 10 28 12 8 6 8 4 4 1 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.8 880.8 878.2 878.3 875.2 874.8 872.8 874.4 878.8 882.3 883.1 879.9 878.3 MAX. QFE PRESSURE IN HPA 888.2 891.4 884.5 882.8 881.0 880.6 875.9 877.8 883.8 885.9 887.4 887.2 891.4 DAY 12 15 12 14 25 23 11 23 30 13 24 17 MIN. QFE PRESSURE IN HPA 871.8 873.8 869.2 872.0 869.2 867.6 868.1 870.1 872.7 878.3 877.3 872.8 867.6 DAY 25 4 6 10 22 11 8 11 8 4 5 25 MEAN QNH PRESSURE IN HPA 1018.2 1018.2 1015.3 1015.3 1011.9 1011.4 1009.1 1010.9 1015.9 1019.9 1020.7 1017.1 1015.3 MAX. QNH PRESSURE IN HPA 1026.5 1030.1 1022.3 1020.4 1018.4 1017.9 1012.7 1014.8 1021.5 1023.9 1025.6 1025.4 1030.1 DAY 12 15 12 14 25 23 11 23 30 13 24 17 MIN. QNH PRESSURE IN HPA 1008.1 1010.3 1005.1 1008.3 1005.1 1003.3 1003.9 1006.1 1009.1 1015.4 1014.2 1009.2 1003.3 DAY 25 4 6 10 22 11 8 11 8 4 5 25 MEAN QFF PRESSURE IN HPA 1019.5 1019.5 1013.6 1009.3 1004.5 1000.9 996.8 998.9 1006.2 1013.3 1017.5 1017.8 1009.8 MAX. QFF PRESSURE IN HPA 1027.6 1033.2 1022.9 1018.0 1013.7 1007.9 1001.4 1003.6 1015.2 1017.9 1024.0 1028.2 1033.2 DAY 12 15 12 14 25 23 11 27 27 13 24 17 MIN. QFF PRESSURE IN HPA 1008.7 1009.5 1004.8 1002.4 997.0 992.2 991.1 993.5 996.6 1008.5 1008.5 1008.2 991.1 DAY 25 28 6 10 22 11 8 6 8 4 5 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 881.2 881.2 878.3 877.9 874.8 874.3 872.3 874.1 878.7 882.5 883.4 880.2 878.2 MAX. QFE PRESSURE IN HPA 888.7 891.6 884.8 882.0 880.3 879.5 875.6 877.5 884.2 886.4 887.8 887.4 891.6 DAY 12 15 12 19 25 23 11 23 30 13 24 17 MIN. QFE PRESSURE IN HPA 872.3 874.3 869.6 871.5 868.0 866.2 868.1 869.4 872.7 878.3 877.8 873.4 866.2 DAY 25 28 6 4 22 11 8 11 8 4 4 31 MEAN QNH PRESSURE IN HPA 1018.6 1018.6 1015.4 1014.9 1011.4 1010.9 1008.6 1010.6 1015.8 1020.1 1021.2 1017.5 1015.3 MAX. QNH PRESSURE IN HPA 1027.1 1030.3 1022.7 1019.5 1017.6 1016.7 1012.3 1014.5 1022.0 1024.5 1026.0 1025.6 1030.3 DAY 12 15 12 19 25 23 11 23 30 13 24 17 MIN. QNH PRESSURE IN HPA 1008.6 1010.9 1005.6 1007.7 1003.8 1001.7 1003.9 1005.3 1009.1 1015.4 1014.8 1009.8 1001.7 DAY 25 28 6 4 22 11 8 11 8 4 4 31 MEAN QFF PRESSURE IN HPA 1020.6 1020.5 1014.2 1009.5 1004.4 1000.8 996.8 999.2 1006.9 1014.4 1018.9 1018.8 1010.4 MAX. QFF PRESSURE IN HPA 1029.0 1034.4 1023.9 1017.0 1012.8 1006.8 1001.8 1004.3 1016.3 1019.6 1025.5 1028.7 1034.4 DAY 12 15 12 14 25 23 11 27 30 13 27 17 MIN. QFF PRESSURE IN HPA 1010.2 1009.6 1005.2 1003.3 996.3 990.5 990.7 993.1 997.4 1009.2 1009.4 1009.4 990.5 DAY 25 28 6 10 22 11 7 6 8 4 4 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 881.8 881.6 878.8 878.9 875.7 874.9 873.0 874.9 879.6 883.2 884.0 880.8 878.9 MAX. QFE PRESSURE IN HPA 888.9 891.8 885.5 883.2 881.0 880.4 876.0 879.2 885.0 886.6 888.1 887.6 891.8 DAY 12 15 12 14 25 23 11 31 30 20 23 17 MIN. QFE PRESSURE IN HPA 873.1 874.6 869.3 871.7 868.3 867.0 868.6 870.4 873.9 878.9 878.4 872.9 867.0 DAY 25 28 6 4 22 11 13 11 7 4 5 31 MEAN QNH PRESSURE IN HPA 1019.3 1019.1 1015.9 1016.0 1012.4 1011.5 1009.4 1011.6 1016.8 1020.9 1021.8 1018.1 1016.1 MAX. QNH PRESSURE IN HPA 1027.3 1030.5 1023.5 1020.9 1018.4 1017.7 1012.8 1016.4 1022.9 1024.7 1026.4 1025.8 1030.5 DAY 12 15 12 14 25 23 11 31 30 20 23 17 MIN. QNH PRESSURE IN HPA 1009.5 1011.2 1005.2 1007.9 1004.1 1002.7 1004.4 1006.5 1010.4 1016.0 1015.5 1009.3 1002.7 DAY 25 28 6 4 22 11 13 11 7 4 5 31 MEAN QFF PRESSURE IN HPA 1021.2 1020.8 1014.6 1010.1 1005.0 1001.1 997.4 999.9 1007.3 1014.5 1019.0 1019.1 1010.8 MAX. QFF PRESSURE IN HPA 1029.6 1033.8 1024.8 1018.1 1013.6 1007.8 1001.3 1005.1 1016.5 1018.5 1025.4 1029.0 1033.8 DAY 12 15 12 14 24 23 11 22 27 13 23 17 MIN. QFF PRESSURE IN HPA 1010.6 1009.5 1005.1 1003.7 997.0 991.2 991.3 994.1 998.4 1008.9 1010.0 1010.5 991.2 DAY 24 28 6 9 22 11 7 6 7 4 5 1 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 881.8 881.7 878.8 878.9 876.0 875.2 873.3 875.3 879.8 883.2 884.1 880.8 879.1 MAX. QFE PRESSURE IN HPA 889.9 891.2 885.5 884.2 882.0 881.0 876.4 879.2 885.0 886.6 888.5 887.6 891.2 DAY 12 15 12 28 25 23 11 31 30 20 23 17 MIN. QFE PRESSURE IN HPA 872.8 874.6 868.0 871.7 868.3 868.1 869.5 870.8 873.6 878.7 878.5 871.7 868.0 DAY 25 20 6 4 22 11 7 11 19 4 4 31 MEAN QNH PRESSURE IN HPA 1019.3 1019.2 1015.9 1016.1 1012.8 1011.9 1009.7 1011.9 1017.0 1020.9 1021.9 1018.2 1016.2 MAX. QNH PRESSURE IN HPA 1028.4 1029.9 1023.5 1022.0 1019.5 1018.4 1013.2 1016.4 1022.9 1024.7 1026.8 1025.8 1029.9 DAY 12 15 12 28 25 23 11 31 30 20 23 17 MIN. QNH PRESSURE IN HPA 1009.2 1011.2 1003.8 1007.9 1004.1 1003.9 1005.5 1006.9 1010.1 1015.8 1015.6 1007.9 1003.8 DAY 25 20 6 4 22 11 7 11 19 4 4 31 MEAN QFF PRESSURE IN HPA 1020.6 1020.6 1014.3 1009.9 1005.1 1001.2 997.4 999.9 1007.3 1014.2 1018.7 1018.8 1010.7 MAX. QFF PRESSURE IN HPA 1029.5 1033.8 1023.7 1017.4 1014.4 1008.0 1001.4 1005.3 1016.4 1018.8 1025.5 1028.3 1033.8 DAY 12 13 11 14 24 23 12 27 27 16 23 17 MIN. QFF PRESSURE IN HPA 1009.7 1008.9 1003.2 1002.9 996.5 992.3 991.9 994.5 998.4 1008.4 1009.5 1009.7 991.9 DAY 24 28 6 9 22 11 7 6 7 4 4 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 4.5 6.5 15.4 18.1 26.9 31.8 28.1 24.1 18.7 13.0 6.1 16.2 MINIMUN AIR TEMPERATURE (C) -2.0 0.5 2.1 10.4 13.3 21.2 26.1 22.6 18.7 13.8 9.0 3.1 11.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 16 29 25 2 0 0 0 73 DAYS WITH MINIMUM TEMP. <=-4 11 3 1 0 0 0 0 0 0 0 0 0 15 DAYS WITH FREEZING MIN.<= 0 25 15 12 0 0 0 0 0 0 0 1 4 57 TEMPERATURE RECORDS LOWEST(C) -6.0 -4.0 -4.5 4.5 3.0 17.0 20.0 16.5 14.5 10.0 -1.0 -3.5 -6.0 DAY 28 12 12 3 5 9 12 30 29 29 28 29 MAXIMUM AIR TEMPERATURE (C) 5.2 8.8 10.7 20.6 23.0 32.2 37.2 33.4 29.6 24.5 18.3 9.8 21.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 22 31 28 16 0 0 0 100 DAYS WITH MAXIMUM TEMP. <= 0 2 0 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS HIGHEST(C) 10.0 15.0 20.0 26.5 32.0 38.0 41.0 37.5 33.5 28.5 22.5 15.0 41.0 DAY 2 22 29 21 30 30 5 25 25 13 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 7.2 8.3 8.6 10.2 9.7 11.0 11.1 10.8 10.9 10.7 9.3 6.7 9.5 MEAN DAILY TEMP. (MDT) (C) 1.6 4.7 6.4 15.5 18.1 26.7 31.7 28.0 24.1 19.1 13.7 6.4 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 19.6 170.7 330.2 217.4 96.7 7.5 0.0 0.0 842.1 HEATING DEG. DAYS(BASE 18 0C) 508.8 386.8 359.7 85.3 57.2 0.0 0.0 0.0 0.0 10.5 130.3 358.8 1897.4 DEWPOINT (MEAN C) -7.5 -5.9 -3.1 3.6 7.1 10.2 12.6 12.1 5.8 0.5 -1.1 -3.1 2.6 MIXING RATIO (G/KG) 2.70 3.01 3.79 5.86 7.37 9.13 10.83 10.46 6.71 4.71 4.23 3.72 6.04 VAPOUR PRESSURE (HPA) 3.80 4.22 5.31 8.18 10.28 12.65 14.95 14.49 9.39 6.62 5.96 5.24 8.42 SATURATION DEF. (HPA) 3.18 4.41 4.77 9.98 11.67 23.71 33.16 24.36 21.29 15.59 9.54 4.41 13.84 RELATIVE HUMIDITY (MEAN %) 54 50 53 48 52 37 32 39 32 31 40 55 44 RELATIVE HUMIDITY (MAX. %) 73 68 68 67 67 52 42 51 40 43 51 72 58 RELATIVE HUMIDITY (MIN. %) 38 33 39 33 40 27 25 30 24 22 29 39 32 RELATIVE HUMIDITY (MEAN% 03UTC) 63 53 61 57 62 45 38 46 35 37 46 59 50 RELATIVE HUMIDITY (MEAN% 09UTC) 46 45 45 42 46 32 30 34 27 25 32 43 37 RELATIVE HUMIDITY (MEAN% 15UTC) 54 49 51 43 45 31 29 35 32 33 40 53 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 34.3 32.9 62.4 45.9 48.1 14.8 5.1 0.6 0.0 0.0 6.0 28.1 278.2 DAYS WITH PRECIPITATION >=10 0 1 2 1 1 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 3 2 5 2 3 1 0 0 0 0 1 2 19 DAYS WITH PRECIPITATION >= 1 7 7 10 6 9 4 2 0 0 0 1 9 55 DAYS WITH PRECIPITATION 10 10 14 13 16 10 3 1 0 0 5 12 94 GREATEST DAILY PRECIPITATION 7.0 16.0 15.0 30.2 17.4 6.0 3.0 0.6 0.0 0.0 6.0 9.0 30.2 DAY 8 25 15 27 2 1 12 29 ** ** 8 15 DAY WITH THUNDER STORM 0 0 0 3 6 7 2 1 0 0 0 1 20 DAYS WITH SNOW OR SLEET 6 8 4 0 0 0 0 0 0 0 0 4 22 DAYS WITH DUST 0 2 0 1 1 2 1 0 0 0 2 0 9 WIND DIRECTION (PREVAILING) 45 45 45 45 45 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 6.2 8.1 6.6 8.9 7.3 8.9 6.4 6.1 7.0 6.5 7.0 6.3 7.2 PREVAILING WIND PERCENT 15.3 25.0 13.7 20.4 20.6 21.7 19.8 17.7 22.5 24.6 25.0 14.5 20.0 CALMS PERCENT OF WIND 60.1 44.0 59.7 37.9 39.1 31.7 40.7 47.6 45.0 50.0 57.1 66.9 48.4 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 243 16 262 283 280 285 200 207 218 8 23 307 293 VECTOR WIND MAGNITUDE(KNOTS) 0.4 1.1 0.3 1.3 0.5 1.0 0.5 0.6 0.3 0.3 0.9 0.2 0.3 WIND STEADINESES (MEAN %) 13.8 24.4 9.7 21.7 10.2 15.6 12.8 17.6 7.5 8.8 28.1 8.0 7.5 WIND SPEED (MEAN KNOTS) 2.9 4.5 3.1 6.0 4.9 6.4 3.9 3.4 4.0 3.4 3.2 2.5 4.0 FASTEST WIND DIRECTION 270 250 240 290 300 240 270 10 190 240 270 240 240 FASTEST WIND SPEED (KNOTS) 17 19 19 21 31 39 29 19 17 16 23 19 39 DAY 3 5 6 15 31 15 9 12 24 11 8 28 DAYS WITH SKY CLEAR (0-2)/8 10 9 10 10 7 22 23 25 29 28 13 8 194 DAYS WITH P.CLOUDY (3-6)/8 15 14 11 15 14 7 8 5 1 2 13 11 116 DAYS WITH CLOUDY (7-8)/8 6 6 10 5 10 1 0 1 0 1 4 12 56 DAYS WITH VISIBILITY =< 2 KM 6 1 3 0 2 0 0 0 0 0 1 2 15 DURATION OF SUNSHINE HOURS 123.6 101.4 160.2 215.7 216.3 314.5 340.6 326.7 300.8 251.1 157.2 103.9 2612.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 881.0 877.6 879.3 877.2 879.2 875.0 874.1 877.3 880.3 882.1 883.3 881.6 879.0 MAX. QFE PRESSURE IN HPA 892.0 885.9 890.5 882.0 885.8 881.6 878.8 885.5 885.8 888.1 892.3 887.0 892.3 DAY-HOUR 10- 6 16- 6 12- 6 20- 6 2-18 11- 6 14- 6 31- 6 1- 6 30- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 870.8 868.3 867.8 869.8 874.2 868.4 868.7 870.2 873.9 876.7 872.7 876.7 867.8 DAY-HOUR 3- 0 24-15 31- 0 18- 0 20-15 27-12 18-15 1-15 17-15 5-15 26- 0 19-12 MEAN QNH PRESSURE IN HPA 1018.4 1014.6 1016.5 1014.1 1016.4 1011.6 1010.6 1014.3 1017.6 1019.7 1020.9 1019.0 1016.1 MAX. QNH PRESSURE IN HPA 1030.8 1023.9 1029.1 1019.5 1023.8 1019.1 1015.9 1023.5 1023.8 1026.4 1031.1 1025.1 1031.1 DAY-HOUR 10- 6 16- 6 12- 6 20- 6 2-18 11- 6 14- 6 31- 6 1- 6 30- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 1006.9 1004.1 1003.5 1005.8 1010.7 1004.2 1004.6 1006.3 1010.4 1013.6 1009.1 1013.6 1003.5 DAY-HOUR 3- 0 24-15 31- 0 18- 0 20-15 27-12 18-15 1-15 17-15 5-15 26- 0 19-12 MEAN QFF PRESSURE IN HPA 1021.4 1015.9 1016.8 1009.6 1010.6 1001.5 998.2 1003.5 1009.0 1013.8 1017.9 1019.5 1011.5 MAX. QFF PRESSURE IN HPA 1035.5 1027.1 1033.4 1017.5 1023.4 1009.6 1004.7 1015.5 1017.5 1021.9 1027.9 1029.3 1035.5 DAY-HOUR 10- 6 16- 6 12- 6 8- 3 2-18 7- 6 14- 6 31- 6 30- 6 30- 6 4- 6 28-21 MIN. QFF PRESSURE IN HPA 1007.3 1001.7 999.4 999.6 1001.9 993.0 991.6 993.5 1001.5 1006.5 1005.5 1013.8 991.6 DAY-HOUR 3- 0 24-18 30-12 18- 0 31-12 27-12 18-15 1-12 17-15 5-12 25-12 19-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 880.7 877.5 879.0 876.9 879.3 875.1 874.1 877.3 880.4 882.2 883.2 881.4 878.9 MAX. QFE PRESSURE IN HPA 891.0 884.2 887.5 880.7 884.6 880.5 877.2 882.8 884.5 887.3 890.6 885.4 891.0 DAY 10 16 13 8 3 7 15 31 2 30 4 1 MIN. QFE PRESSURE IN HPA 870.8 869.9 867.8 869.8 874.8 869.0 870.0 872.3 875.0 878.1 872.7 877.1 867.8 DAY 3 25 31 18 10 27 19 1 18 6 26 28 MEAN QNH PRESSURE IN HPA 1018.0 1014.5 1016.2 1013.8 1016.5 1011.7 1010.7 1014.2 1017.7 1019.7 1020.9 1018.9 1016.1 MAX. QNH PRESSURE IN HPA 1029.6 1022.0 1025.7 1018.1 1022.4 1017.8 1014.1 1020.4 1022.3 1025.5 1029.2 1023.3 1029.6 DAY 10 16 13 8 3 7 15 31 2 30 4 1 MIN. QNH PRESSURE IN HPA 1006.9 1005.9 1003.5 1005.8 1011.4 1004.9 1006.0 1008.6 1011.6 1015.1 1009.1 1014.0 1003.5 DAY 3 25 31 18 10 27 19 1 18 6 26 28 MEAN QFF PRESSURE IN HPA 1020.7 1015.6 1016.4 1009.3 1010.8 1001.7 998.2 1003.2 1008.9 1013.6 1017.5 1019.2 1011.3 MAX. QFF PRESSURE IN HPA 1033.8 1025.0 1030.1 1017.0 1021.8 1008.2 1003.0 1012.3 1014.4 1020.2 1025.1 1028.0 1033.8 DAY 10 16 12 8 3 7 15 31 2 30 4 29 MIN. QFF PRESSURE IN HPA 1007.3 1004.3 999.6 999.6 1005.0 993.6 993.1 995.4 1002.5 1007.8 1006.4 1015.3 993.1 DAY 3 25 31 18 19 27 19 1 18 6 26 28 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 880.7 877.6 879.5 877.5 879.7 875.7 875.0 878.2 880.9 882.5 883.4 881.6 879.4 MAX. QFE PRESSURE IN HPA 890.6 885.0 889.0 881.5 884.3 880.7 877.9 884.4 884.9 887.5 891.4 885.7 891.4 DAY 10 16 12 20 3 11 14 31 2 30 4 1 MIN. QFE PRESSURE IN HPA 873.3 870.3 867.8 870.0 874.6 869.4 871.7 872.6 875.8 878.8 873.8 878.0 867.8 DAY 1 25 31 18 10 27 10 1 18 6 26 27 MEAN QNH PRESSURE IN HPA 1018.1 1014.6 1016.7 1014.4 1016.9 1012.4 1011.7 1015.2 1018.3 1020.1 1021.1 1019.1 1016.6 MAX. QNH PRESSURE IN HPA 1029.2 1022.9 1027.4 1019.0 1022.1 1018.1 1014.9 1022.2 1022.8 1025.7 1030.1 1023.7 1030.1 DAY 10 16 12 20 3 11 14 31 2 30 4 1 MIN. QNH PRESSURE IN HPA 1009.7 1006.4 1003.5 1006.0 1011.2 1005.3 1007.9 1008.9 1012.6 1015.9 1010.3 1015.0 1003.5 DAY 1 25 31 18 10 27 10 1 18 6 26 27 MEAN QFF PRESSURE IN HPA 1021.6 1016.3 1017.5 1010.5 1011.3 1002.7 999.6 1004.9 1010.4 1015.1 1018.7 1019.9 1012.4 MAX. QFF PRESSURE IN HPA 1034.4 1026.6 1033.2 1017.5 1021.1 1008.5 1004.2 1014.8 1015.7 1021.8 1027.3 1028.7 1034.4 DAY 10 16 12 8 3 11 14 31 1 30 4 29 MIN. QFF PRESSURE IN HPA 1011.7 1004.8 1001.2 1000.3 1006.0 994.3 995.8 996.7 1004.4 1009.8 1006.5 1015.3 994.3 DAY 17 25 31 18 19 27 19 1 18 6 25 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION DOUSHAN TAPPEH (40753) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 42 N LONGITUDE 51 20 E DATA PROCESSING CENTER ELEVATION 1209.2 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 882.0 878.6 880.5 878.3 880.2 876.2 875.6 878.9 881.7 883.6 884.3 882.7 880.2 MAX. QFE PRESSURE IN HPA 892.0 885.9 890.5 882.0 885.2 881.6 878.8 885.5 885.8 888.1 892.3 887.0 892.3 DAY 10 16 12 20 2 11 14 31 1 30 4 1 MIN. QFE PRESSURE IN HPA 875.1 872.0 868.2 871.3 875.2 870.2 872.2 873.1 876.6 880.5 876.1 879.2 868.2 DAY 3 11 31 18 4 27 10 1 18 5 25 4 MEAN QNH PRESSURE IN HPA 1019.5 1015.7 1017.8 1015.3 1017.4 1013.0 1012.3 1016.1 1019.2 1021.3 1022.1 1020.3 1017.5 MAX. QNH PRESSURE IN HPA 1030.8 1023.9 1029.1 1019.5 1023.1 1019.1 1015.9 1023.5 1023.8 1026.4 1031.1 1025.1 1031.1 DAY 10 16 12 20 2 11 14 31 1 30 4 1 MIN. QNH PRESSURE IN HPA 1011.8 1008.3 1004.0 1007.5 1011.9 1006.3 1008.5 1009.5 1013.5 1017.8 1012.9 1016.4 1004.0 DAY 3 11 31 18 4 27 10 1 18 5 25 4 MEAN QFF PRESSURE IN HPA 1022.8 1017.2 1018.2 1010.9 1011.6 1002.9 999.9 1005.3 1010.5 1015.4 1019.2 1021.0 1012.9 MAX. QFF PRESSURE IN HPA 1035.5 1027.1 1033.4 1016.8 1022.7 1009.6 1004.7 1015.5 1017.5 1021.9 1027.9 1029.1 1035.5 DAY 10 16 12 8 2 7 14 31 30 30 4 29 MIN. QFF PRESSURE IN HPA 1013.5 1007.5 1001.6 1002.7 1005.8 994.6 996.6 996.3 1004.3 1010.3 1008.9 1016.5 994.6 DAY 3 25 31 18 31 27 18 1 18 5 25 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 881.1 878.0 879.8 877.5 879.7 875.6 874.8 878.1 880.9 882.4 883.3 881.4 879.4 MAX. QFE PRESSURE IN HPA 891.3 885.0 890.0 881.2 885.3 880.8 877.9 884.3 885.0 886.4 891.7 885.6 891.7 DAY 10 16 12 8 2 11 14 31 1 29 4 1 MIN. QFE PRESSURE IN HPA 875.2 871.5 868.5 870.7 874.5 869.2 871.7 871.9 876.4 879.5 874.7 877.6 868.5 DAY 3 11 31 18 4 27 10 1 18 5 25 27 MEAN QNH PRESSURE IN HPA 1018.5 1015.0 1017.0 1014.5 1017.0 1012.3 1011.4 1015.2 1018.2 1020.0 1021.0 1018.9 1016.6 MAX. QNH PRESSURE IN HPA 1030.0 1022.9 1028.5 1018.6 1023.2 1018.2 1014.9 1022.1 1022.9 1024.5 1030.4 1023.6 1030.4 DAY 10 16 12 8 2 11 14 31 1 29 4 1 MIN. QNH PRESSURE IN HPA 1011.9 1007.7 1004.3 1006.8 1011.1 1005.1 1007.9 1008.2 1013.2 1016.7 1011.3 1014.6 1004.3 DAY 3 11 31 18 4 27 10 1 18 5 25 27 MEAN QFF PRESSURE IN HPA 1021.2 1016.0 1017.0 1009.8 1011.0 1001.9 998.7 1004.2 1009.3 1013.7 1017.6 1019.1 1011.6 MAX. QFF PRESSURE IN HPA 1033.7 1025.4 1032.2 1015.5 1023.0 1007.9 1003.8 1013.9 1016.1 1019.0 1026.6 1026.1 1033.7 DAY 10 16 12 8 2 11 14 31 30 30 4 29 MIN. QFF PRESSURE IN HPA 1013.0 1007.4 1001.6 1001.4 1003.9 993.2 994.7 994.6 1003.9 1009.0 1006.8 1014.8 993.2 DAY 2 25 31 18 31 27 18 1 17 14 25 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 880.2 876.8 878.7 876.3 878.5 874.3 873.2 876.4 879.2 881.1 882.3 880.7 878.1 MAX. QFE PRESSURE IN HPA 890.2 883.8 889.1 879.7 885.0 879.4 876.7 882.5 883.0 885.9 889.7 884.8 890.2 DAY 10 16 12 26 2 7 14 31 1 29 4 1 MIN. QFE PRESSURE IN HPA 873.0 870.0 867.9 870.5 874.4 868.4 869.6 870.5 874.7 877.1 873.7 876.7 867.9 DAY 30 24 30 18 4 27 18 1 17 5 25 19 MEAN QNH PRESSURE IN HPA 1017.5 1013.7 1015.8 1013.2 1015.5 1010.8 1009.6 1013.2 1016.4 1018.5 1019.9 1018.0 1015.2 MAX. QNH PRESSURE IN HPA 1028.7 1021.5 1027.5 1016.9 1022.9 1016.6 1013.6 1020.1 1020.6 1023.9 1028.2 1022.7 1028.7 DAY 10 16 12 26 2 7 14 31 1 29 4 1 MIN. QNH PRESSURE IN HPA 1009.4 1006.0 1003.7 1006.6 1011.0 1004.2 1005.6 1006.6 1011.3 1014.0 1010.2 1013.6 1003.7 DAY 30 24 30 18 4 27 18 1 17 5 25 19 MEAN QFF PRESSURE IN HPA 1020.2 1014.7 1015.9 1008.5 1009.7 1000.7 997.0 1002.2 1007.5 1012.2 1016.6 1018.4 1010.3 MAX. QFF PRESSURE IN HPA 1032.6 1023.5 1031.1 1013