STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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OF WIND OBSERVATION **** 140 155 150 155 150 155 155 150 155 150 155 1670 VECTOR WIND DIRECTION (MEAN) *** 295 16 332 276 14 39 31 15 343 289 272 *** VECTOR WIND MAGNITUDE(KNOTS) **** 1.3 1.8 1.8 2.7 4.2 7.4 5.7 2.4 0.9 1.1 1.2 **** WIND STEADINESES (MEAN %) ***** 40.6 48.6 31.6 37.5 58.3 92.5 85.1 55.8 32.1 47.8 37.5 ***** WIND SPEED (MEAN KNOTS) **** 3.2 3.7 5.7 7.2 7.2 8.0 6.7 4.3 2.8 2.3 3.2 **** FASTEST WIND DIRECTION *** 330 320 260 220 270 20 20 20 270 270 290 *** FASTEST WIND SPEED (KNOTS) *** 19 19 29 29 29 29 23 19 27 31 31 *** DAY ** 7 8 13 4 9 21 4 30 13 11 3 DAYS WITH SKY CLEAR (0-2)/8 **** 10 11 3 15 28 31 29 30 27 17 15 **** DAYS WITH P.CLOUDY (3-6)/8 **** 10 15 22 13 1 0 2 0 4 7 10 **** DAYS WITH CLOUDY (7-8)/8 **** 8 5 5 3 1 0 0 0 0 6 6 **** DAYS WITH VISIBILITY =< 2 KM **** 0 1 0 0 1 0 0 0 0 0 0 **** DURATION OF SUNSHINE HOURS ****** ****** 228.6 228.8 303.3 367.3 372.2 349.3 328.7 299.3 211.1 213.1 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. 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QNH PRESSURE IN HPA ****** 1009.8 1006.2 1010.0 1007.7 1001.3 1005.4 1008.5 1011.5 1014.4 1010.5 1009.2 ****** DAY ** 10 8 30 31 17 26 15 29 5 7 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** 918.1 918.3 916.0 914.2 908.4 911.0 913.4 917.5 920.0 920.7 921.6 ****** MAX. QFE PRESSURE IN HPA ****** 924.5 926.5 920.6 921.4 915.5 914.3 917.7 922.4 925.2 927.5 929.9 ****** DAY ** 22 27 5 18 2 22 31 22 15 21 7 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 ****** 918.5 918.6 916.3 914.4 908.3 910.8 913.3 917.6 920.3 921.3 922.4 ****** MAX. QFE PRESSURE IN HPA ****** 924.2 927.0 922.0 922.0 915.2 913.5 917.8 922.6 925.5 928.6 931.2 ****** DAY ** 22 27 5 19 2 22 31 22 14 15 6 MIN. 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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 KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.5 11.7 15.7 22.5 29.5 33.2 33.8 34.0 29.1 18.4 16.1 10.1 22.0 MINIMUN AIR TEMPERATURE (C) 0.6 4.0 8.9 14.5 20.5 23.1 24.8 24.4 20.1 10.9 7.2 2.0 13.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 5 12 29 30 31 10 1 0 0 118 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH FREEZING MIN.<= 0 19 5 0 0 0 0 0 0 0 0 1 9 34 TEMPERATURE RECORDS LOWEST(C) -2.8 -1.3 2.2 5.6 11.8 20.6 19.4 21.2 15.8 4.6 -1.8 -5.2 -5.2 DAY 14 12 22 6 7 1 5 25 25 18 30 4 MAXIMUM AIR TEMPERATURE (C) 15.1 17.1 20.5 27.4 34.2 37.9 38.5 38.9 34.6 23.1 21.5 15.4 27.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 14 26 30 31 31 30 8 0 0 170 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.6 24.4 26.2 36.2 39.4 41.8 43.3 41.7 41.2 35.2 29.8 20.8 43.3 DAY 31 28 2 19 12 18 7 16 6 4 6 20 DIF. BETWEEN (MAX.-MIN.) (C) 14.5 13.1 11.6 12.9 13.7 14.8 13.7 14.5 14.5 12.2 14.3 13.4 13.6 MEAN DAILY TEMP. (MDT) (C) 7.8 10.6 14.7 21.0 27.4 30.5 31.7 31.7 27.3 17.0 14.4 8.7 20.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 77.0 199.5 285.3 330.4 330.5 189.9 31.8 0.1 0.0 1444.7 HEATING DEG. DAYS(BASE 18 0C) 306.1 208.4 104.4 40.1 0.0 0.0 0.0 0.0 0.0 92.0 119.3 289.5 1159.6 DEWPOINT (MEAN C) -5.0 -2.9 -0.1 1.7 4.8 -0.2 10.9 7.0 6.4 1.2 -3.9 -5.3 1.2 MIXING RATIO (G/KG) 2.91 3.48 4.43 4.92 6.06 4.39 9.26 7.02 6.74 4.87 3.29 2.99 5.03 VAPOUR PRESSURE (HPA) 4.29 5.12 6.47 7.19 8.84 6.39 13.37 10.17 9.82 7.16 4.85 4.41 7.34 SATURATION DEF. (HPA) 8.19 9.40 12.20 22.41 33.89 46.01 41.08 44.50 32.08 15.90 14.69 8.52 24.07 RELATIVE HUMIDITY (MEAN %) 39 39 38 31 23 13 26 20 26 35 28 37 30 RELATIVE HUMIDITY (MAX. %) 58 58 58 48 35 23 36 33 38 50 43 54 45 RELATIVE HUMIDITY (MIN. %) 26 26 25 21 17 9 21 14 19 26 19 25 21 RELATIVE HUMIDITY (MEAN% 03UTC) 58 57 53 47 34 23 36 33 38 50 42 52 44 RELATIVE HUMIDITY (MEAN% 09UTC) 30 30 31 24 19 10 23 15 22 29 21 29 24 RELATIVE HUMIDITY (MEAN% 15UTC) 36 38 36 29 20 10 24 16 23 33 28 36 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.0 8.5 68.8 26.7 2.0 0.0 0.3 0.0 0.0 14.0 0.0 0.0 120.3 DAYS WITH PRECIPITATION >=10 0 0 1 1 0 0 0 0 0 1 0 0 3 DAYS WITH PRECIPITATION >= 5 0 1 2 1 0 0 0 0 0 1 0 0 5 DAYS WITH PRECIPITATION >= 1 0 2 5 5 1 0 0 0 0 3 0 0 16 DAYS WITH PRECIPITATION 0 5 11 9 5 0 2 0 1 5 1 4 43 GREATEST DAILY PRECIPITATION 0.0 6.0 52.0 18.0 1.0 0.0 0.3 0.0 0.0 11.0 0.0 0.0 52.0 DAY ** 21 31 5 28 ** 26 ** ** 27 ** ** DAY WITH THUNDER STORM 0 1 0 1 1 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 0 4 4 2 3 1 1 1 0 0 2 21 WIND DIRECTION (PREVAILING) 270 270 270 270 45 45 45 45 45 45 45 270 45 PREVAILING WIND SPEED(KNOTS) 11.9 10.9 11.6 11.9 6.7 9.3 9.1 8.0 8.1 7.1 5.1 11.6 7.8 PREVAILING WIND PERCENT 13.5 11.4 24.5 24.0 18.1 49.3 31.6 32.9 34.0 18.1 14.0 15.5 19.0 CALMS PERCENT OF WIND 65.2 61.4 38.1 37.3 33.5 27.3 34.8 29.7 32.0 60.6 54.7 63.9 44.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 264 302 281 278 342 40 40 38 29 28 312 269 356 VECTOR WIND MAGNITUDE(KNOTS) 1.8 0.8 3.7 3.1 2.3 5.2 3.6 4.5 3.7 1.8 0.9 1.9 1.6 WIND STEADINESES (MEAN %) 64.3 29.6 61.7 55.4 43.4 80.0 67.9 80.4 72.5 66.7 30.0 65.5 35.6 WIND SPEED (MEAN KNOTS) 2.8 2.7 6.0 5.6 5.3 6.5 5.3 5.6 5.1 2.7 3.0 2.9 4.5 FASTEST WIND DIRECTION 270 260 290 270 250 50 20 80 30 320 280 260 290 FASTEST WIND SPEED (KNOTS) 29 19 39 27 23 23 23 19 19 19 33 31 39 DAY 7 5 17 20 5 8 10 13 7 1 3 24 DAYS WITH SKY CLEAR (0-2)/8 23 12 13 17 12 28 24 30 29 16 18 16 238 DAYS WITH P.CLOUDY (3-6)/8 7 13 12 10 15 2 6 1 1 11 12 12 102 DAYS WITH CLOUDY (7-8)/8 1 3 6 3 4 0 1 0 0 4 0 3 25 DAYS WITH VISIBILITY =< 2 KM 0 0 1 1 1 0 0 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 262.6 220.9 227.8 284.3 287.0 352.4 354.1 363.0 311.6 237.9 264.2 215.5 3381.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 923.2 921.2 915.0 917.5 916.3 913.1 912.2 911.9 916.3 923.2 923.5 922.4 918.0 MAX. QFE PRESSURE IN HPA 934.0 930.0 925.4 926.0 923.7 919.6 917.8 919.3 923.6 931.4 936.9 936.8 936.9 DAY-HOUR 12- 6 12- 6 23- 6 22- 6 1- 6 28- 6 11- 3 8- 6 25- 6 16- 6 30- 6 1- 6 MIN. QFE PRESSURE IN HPA 913.5 911.3 904.4 907.1 908.8 907.5 903.2 905.8 910.8 911.7 911.8 911.4 903.2 DAY-HOUR 6-15 10-15 14- 3 19-15 22-15 18-15 3-15 29-15 2-12 4-12 7-12 24- 3 MEAN QNH PRESSURE IN HPA 1021.0 1018.9 1012.2 1014.9 1013.5 1010.0 1009.1 1008.7 1013.5 1021.0 1021.3 1020.2 1015.3 MAX. QNH PRESSURE IN HPA 1032.7 1028.4 1023.4 1024.1 1021.6 1017.1 1015.2 1016.8 1021.5 1029.9 1035.9 1035.8 1035.9 DAY-HOUR 12- 6 12- 6 23- 6 22- 6 1- 6 28- 6 11- 3 8- 6 25- 6 16- 6 30- 6 1- 6 MIN. QNH PRESSURE IN HPA 1010.5 1008.1 1000.6 1003.6 1005.4 1004.0 999.3 1002.1 1007.6 1008.5 1008.7 1008.2 999.3 DAY-HOUR 6-15 10-15 14- 3 19-15 22-15 18-15 3-15 29-15 2-12 4-12 7-12 24- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 923.1 921.5 915.3 918.2 917.2 914.1 913.2 912.9 917.2 923.5 923.6 922.5 918.5 MAX. QFE PRESSURE IN HPA 932.3 929.0 924.2 924.7 923.5 919.1 917.8 918.4 922.6 930.5 935.2 935.2 935.2 DAY 12 7 23 22 1 28 11 6 26 29 30 1 MIN. QFE PRESSURE IN HPA 914.9 914.3 904.4 910.8 910.0 910.6 905.7 908.8 912.5 913.9 915.9 911.4 904.4 DAY 3 9 14 5 23 19 3 25 18 4 7 24 MEAN QNH PRESSURE IN HPA 1020.9 1019.1 1012.5 1015.5 1014.6 1011.1 1010.1 1009.8 1014.5 1021.4 1021.5 1020.3 1015.9 MAX. QNH PRESSURE IN HPA 1030.9 1027.3 1022.1 1022.7 1021.3 1016.6 1015.2 1015.8 1020.4 1028.9 1034.0 1034.0 1034.0 DAY 12 7 23 22 1 28 11 6 26 29 30 1 MIN. QNH PRESSURE IN HPA 1012.0 1011.4 1000.6 1007.6 1006.7 1007.3 1002.0 1005.4 1009.4 1010.9 1013.1 1008.2 1000.6 DAY 3 9 14 5 23 19 3 25 18 4 7 24 MEAN QFF PRESSURE IN HPA 1022.3 1019.5 1011.0 1012.0 1008.6 1004.0 1002.6 1002.3 1008.8 1019.3 1020.6 1021.4 1012.7 MAX. QFF PRESSURE IN HPA 1033.0 1030.1 1022.8 1020.2 1017.1 1009.4 1008.0 1008.1 1015.7 1029.3 1037.2 1037.8 1037.8 DAY 12 7 23 2 1 28 11 8 25 29 30 1 MIN. QFF PRESSURE IN HPA 1010.6 1011.0 997.6 1001.6 999.2 999.1 993.7 998.2 1002.4 1006.5 1010.1 1008.0 993.7 DAY 27 10 14 20 23 19 3 18 5 4 7 24 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 924.6 922.7 916.5 919.1 917.7 914.5 913.5 913.5 918.1 924.6 924.9 923.8 919.5 MAX. QFE PRESSURE IN HPA 934.0 930.0 925.4 926.0 923.7 919.6 917.8 919.3 923.6 931.4 936.9 936.8 936.9 DAY 12 12 23 22 1 28 11 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 916.6 915.5 905.4 911.7 911.7 911.0 905.6 909.9 913.8 914.5 916.2 912.2 905.4 DAY 3 10 14 4 23 19 3 18 5 4 7 24 MEAN QNH PRESSURE IN HPA 1022.6 1020.5 1013.7 1016.5 1015.1 1011.6 1010.5 1010.5 1015.5 1022.5 1022.9 1021.7 1017.0 MAX. QNH PRESSURE IN HPA 1032.7 1028.4 1023.4 1024.1 1021.6 1017.1 1015.2 1016.8 1021.5 1029.9 1035.9 1035.8 1035.9 DAY 12 12 23 22 1 28 11 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1013.9 1012.7 1001.7 1008.5 1008.5 1007.8 1001.9 1006.6 1010.8 1011.6 1013.4 1009.1 1001.7 DAY 3 10 14 4 23 19 3 18 5 4 7 24 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 923.2 921.6 915.4 917.9 916.7 913.4 912.5 912.1 916.6 923.2 923.4 922.3 918.2 MAX. QFE PRESSURE IN HPA 931.9 928.7 924.0 925.1 922.2 918.4 916.5 917.8 922.7 929.9 935.6 935.1 935.6 DAY 12 12 22 22 1 28 11 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 915.9 913.7 905.2 910.5 911.4 909.9 904.8 908.5 912.6 913.2 913.7 913.4 904.8 DAY 2 10 14 19 23 19 3 29 2 4 7 24 MEAN QNH PRESSURE IN HPA 1021.0 1019.3 1012.6 1015.3 1013.9 1010.4 1009.4 1009.0 1013.8 1021.0 1021.2 1020.1 1015.6 MAX. QNH PRESSURE IN HPA 1030.5 1027.0 1021.9 1023.1 1019.9 1015.8 1013.8 1015.2 1020.5 1028.3 1034.5 1033.9 1034.5 DAY 12 12 22 22 1 28 11 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1013.1 1010.7 1001.5 1007.2 1008.2 1006.6 1001.1 1005.1 1009.5 1010.2 1010.7 1010.4 1001.1 DAY 2 10 14 19 23 19 3 29 2 4 7 24 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 922.2 920.1 913.9 916.3 915.0 911.9 911.0 910.5 914.8 922.1 922.5 921.5 916.8 MAX. QFE PRESSURE IN HPA 930.6 927.3 922.7 923.7 920.3 917.0 914.6 916.0 921.1 929.4 934.3 933.5 934.3 DAY 12 12 22 22 1 28 11 8 25 28 30 1 MIN. QFE PRESSURE IN HPA 914.5 912.0 905.2 907.3 909.8 907.9 903.3 906.3 910.8 911.7 911.8 913.3 903.3 DAY 6 10 14 19 22 9 3 29 2 4 7 13 MEAN QNH PRESSURE IN HPA 1019.9 1017.6 1011.0 1013.6 1012.1 1008.8 1007.8 1007.3 1011.9 1019.8 1020.2 1019.1 1014.1 MAX. QNH PRESSURE IN HPA 1029.1 1025.5 1020.5 1021.6 1017.9 1014.3 1011.7 1013.2 1018.7 1027.8 1033.1 1032.2 1033.1 DAY 12 12 22 22 1 28 11 8 25 28 30 1 MIN. QNH PRESSURE IN HPA 1011.6 1008.9 1001.5 1003.8 1006.5 1004.4 999.4 1002.7 1007.6 1008.5 1008.7 1010.3 999.4 DAY 6 10 14 19 22 9 3 29 2 4 7 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 922.8 920.3 914.1 916.2 914.8 911.6 910.8 910.4 914.8 922.5 923.1 922.0 917.0 MAX. QFE PRESSURE IN HPA 930.5 926.9 922.9 923.3 919.4 916.7 914.6 915.3 921.2 929.8 934.6 933.6 934.6 DAY 12 12 22 22 1 28 28 7 25 28 30 1 MIN. QFE PRESSURE IN HPA 913.5 911.3 906.0 907.1 908.8 907.5 903.2 905.8 910.8 911.9 912.0 914.4 903.2 DAY 6 10 14 19 22 18 3 29 2 4 7 30 MEAN QNH PRESSURE IN HPA 1020.5 1017.9 1011.1 1013.5 1011.9 1008.4 1007.6 1007.1 1012.0 1020.3 1020.9 1019.8 1014.2 MAX. QNH PRESSURE IN HPA 1028.9 1025.0 1020.7 1021.1 1016.9 1014.0 1011.7 1012.5 1018.9 1028.2 1033.4 1032.3 1033.4 DAY 12 12 22 22 1 28 28 7 25 28 30 1 MIN. QNH PRESSURE IN HPA 1010.5 1008.1 1002.4 1003.6 1005.4 1004.0 999.3 1002.1 1007.6 1008.8 1008.9 1011.5 999.3 DAY 6 10 14 19 22 18 3 29 2 4 7 30 MEAN QFF PRESSURE IN HPA 1021.8 1018.2 1009.7 1009.8 1005.9 1001.3 999.9 999.6 1006.2 1018.2 1020.0 1020.9 1011.0 MAX. QFF PRESSURE IN HPA 1031.3 1027.3 1021.8 1019.4 1012.5 1006.8 1005.4 1004.9 1014.2 1028.7 1036.5 1035.9 1036.5 DAY 12 12 22 1 1 28 28 8 25 28 30 1 MIN. QFF PRESSURE IN HPA 1011.8 1008.0 1000.2 997.7 999.0 996.1 991.3 995.2 999.6 1003.9 1005.8 1013.3 991.3 DAY 6 10 14 19 22 18 2 29 6 4 7 30 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 KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.6 9.4 16.0 22.1 29.3 34.1 35.5 33.4 29.6 23.2 16.7 11.4 22.4 MINIMUN AIR TEMPERATURE (C) 0.5 3.2 8.6 14.3 19.4 24.1 26.5 24.3 20.0 13.8 7.4 2.9 13.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 7 30 31 27 14 0 0 0 111 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 2 5 DAYS WITH FREEZING MIN.<= 0 15 3 0 0 0 0 0 0 0 0 2 4 24 TEMPERATURE RECORDS LOWEST(C) -5.8 -1.6 2.6 5.4 15.4 21.0 22.5 19.4 15.6 9.4 -1.6 -7.2 -7.2 DAY 3 8 25 3 7 28 1 27 30 3 16 30 MAXIMUM AIR TEMPERATURE (C) 12.5 14.4 21.0 26.8 34.2 38.6 40.4 38.3 35.0 28.8 22.3 16.9 27.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 11 29 30 31 31 26 14 0 0 173 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.4 25.8 30.0 34.0 42.0 42.8 44.4 43.0 41.8 32.0 29.8 22.2 44.4 DAY 29 2 21 20 28 15 12 4 12 20 4 12 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 11.2 12.4 12.5 14.8 14.5 13.9 14.0 15.0 15.0 14.9 14.0 13.7 MEAN DAILY TEMP. (MDT) (C) 6.5 8.8 14.8 20.5 26.8 31.3 33.4 31.3 27.5 21.3 14.8 9.9 20.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.6 58.3 179.4 310.3 385.8 319.4 194.9 31.2 3.3 0.0 1484.3 HEATING DEG. DAYS(BASE 18 0C) 356.7 266.8 108.9 40.1 0.0 0.0 0.0 0.0 0.0 2.2 117.7 251.0 1143.3 DEWPOINT (MEAN C) -5.4 -1.7 -0.8 2.2 -0.1 5.5 8.3 5.0 0.6 -0.2 -3.8 -4.8 0.4 MIXING RATIO (G/KG) 2.89 3.85 4.20 5.24 4.39 6.46 7.89 6.23 4.70 4.31 3.46 3.09 4.73 VAPOUR PRESSURE (HPA) 4.26 5.65 6.13 7.64 6.41 9.36 11.36 9.02 6.86 6.33 5.09 4.54 6.89 SATURATION DEF. (HPA) 6.56 6.93 12.95 20.82 35.83 45.71 48.15 44.07 36.66 23.31 15.56 9.67 25.52 RELATIVE HUMIDITY (MEAN %) 42 52 37 30 18 18 21 19 18 24 26 35 28 RELATIVE HUMIDITY (MAX. %) 61 70 55 47 30 29 33 31 31 36 39 51 43 RELATIVE HUMIDITY (MIN. %) 27 37 24 20 10 13 14 13 10 16 19 24 19 RELATIVE HUMIDITY (MEAN% 03UTC) 58 67 53 45 30 28 33 31 31 36 38 49 42 RELATIVE HUMIDITY (MEAN% 09UTC) 31 47 31 23 14 14 17 15 13 18 21 27 23 RELATIVE HUMIDITY (MEAN% 15UTC) 42 51 35 27 12 16 16 15 15 22 26 34 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 4.5 44.9 58.5 2.7 0.0 0.0 0.6 0.2 0.2 0.3 0.3 1.0 113.2 DAYS WITH PRECIPITATION >=10 0 2 3 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 0 2 4 0 0 0 0 0 0 0 0 0 6 DAYS WITH PRECIPITATION >= 1 1 5 5 2 0 0 0 0 0 0 0 0 13 DAYS WITH PRECIPITATION 7 11 8 4 0 0 3 1 1 1 1 4 41 GREATEST DAILY PRECIPITATION 2.0 22.0 24.0 1.0 0.0 0.0 0.5 0.2 0.2 0.3 0.3 0.6 24.0 DAY 7 3 24 26 ** ** 28 25 3 16 15 17 DAY WITH THUNDER STORM 0 0 2 1 0 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 2 1 5 2 2 7 7 5 2 0 2 1 36 WIND DIRECTION (PREVAILING) 270 270 270 270 45 45 45 45 45 45 270 270 45 PREVAILING WIND SPEED(KNOTS) 10.3 7.7 11.2 10.4 6.6 8.7 9.1 8.1 7.4 6.0 9.0 7.8 7.7 PREVAILING WIND PERCENT 27.1 19.3 25.8 19.3 20.6 22.7 44.5 34.8 34.0 13.5 16.0 21.3 16.7 CALMS PERCENT OF WIND 47.7 49.7 35.5 36.7 34.2 27.3 18.7 25.8 38.7 54.8 54.0 58.7 40.1 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 275 273 276 290 337 345 33 32 41 11 257 253 340 VECTOR WIND MAGNITUDE(KNOTS) 3.2 1.4 3.5 1.5 2.8 2.9 6.6 4.6 3.4 0.7 1.7 1.9 1.6 WIND STEADINESES (MEAN %) 76.2 40.0 58.3 30.0 50.9 43.3 86.8 76.7 81.0 26.9 54.8 63.3 33.3 WIND SPEED (MEAN KNOTS) 4.2 3.5 6.0 5.0 5.5 6.7 7.6 6.0 4.2 2.6 3.1 3.0 4.8 FASTEST WIND DIRECTION 300 310 260 270 260 310 30 20 40 270 270 260 270 FASTEST WIND SPEED (KNOTS) 31 23 27 35 23 31 29 23 29 17 29 35 35 DAY 29 25 21 30 12 2 14 5 21 22 14 27 DAYS WITH SKY CLEAR (0-2)/8 12 13 18 9 25 28 27 27 29 27 18 16 249 DAYS WITH P.CLOUDY (3-6)/8 16 9 5 16 6 2 4 4 1 4 8 12 87 DAYS WITH CLOUDY (7-8)/8 3 7 8 5 0 0 0 0 0 0 4 3 30 DAYS WITH VISIBILITY =< 2 KM 0 4 2 0 0 1 0 0 0 0 1 1 9 DURATION OF SUNSHINE HOURS 215.4 190.0 246.2 244.5 354.6 357.1 360.5 351.3 319.8 305.8 234.7 210.6 3390.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 921.2 920.0 915.4 917.0 914.6 910.6 908.1 910.5 915.6 920.7 921.7 920.2 916.3 MAX. QFE PRESSURE IN HPA 933.5 933.0 926.5 929.3 922.6 918.0 916.1 917.9 922.7 928.7 928.3 929.2 933.5 DAY-HOUR 3- 6 7- 6 17- 6 9- 6 17- 6 8- 6 31- 6 21- 6 24- 6 17- 6 6- 6 29-15 MIN. QFE PRESSURE IN HPA 910.6 909.1 906.5 908.8 907.4 901.5 901.3 903.4 908.0 912.7 912.6 902.3 901.3 DAY-HOUR 29- 3 2-12 5-12 25-12 29-15 30-15 17-15 4-15 12-15 30-12 28-15 27-12 MEAN QNH PRESSURE IN HPA 1018.8 1017.5 1012.6 1014.3 1011.7 1007.3 1004.6 1007.3 1012.7 1018.3 1019.4 1017.8 1013.5 MAX. QNH PRESSURE IN HPA 1032.2 1031.7 1024.6 1027.6 1020.4 1015.4 1013.3 1015.3 1020.5 1027.0 1026.6 1027.5 1032.2 DAY-HOUR 3- 6 7- 6 17- 6 9- 6 17- 6 8- 6 31- 6 21- 6 24- 6 17- 6 6- 6 29-15 MIN. QNH PRESSURE IN HPA 1007.3 1005.7 1002.9 1005.4 1003.9 997.5 997.3 999.5 1004.5 1009.6 1009.5 998.3 997.3 DAY-HOUR 29- 3 2-12 5-12 25-12 29-15 30-15 17-15 4-15 12-15 30-12 28-15 27-12 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 921.2 920.0 915.9 917.4 915.6 911.6 909.4 911.5 916.4 921.1 922.1 920.4 916.9 MAX. QFE PRESSURE IN HPA 932.3 931.6 925.7 928.0 922.2 917.4 915.9 917.2 922.2 928.3 927.8 928.6 932.3 DAY 3 7 17 9 17 8 31 21 24 17 16 30 MIN. QFE PRESSURE IN HPA 910.6 912.1 906.8 911.4 908.9 903.6 905.0 906.4 910.9 914.5 915.1 907.3 903.6 DAY 29 2 5 25 1 30 18 30 12 31 20 27 MEAN QNH PRESSURE IN HPA 1018.8 1017.5 1013.1 1014.8 1012.7 1008.4 1006.0 1008.3 1013.6 1018.8 1019.9 1018.0 1014.2 MAX. QNH PRESSURE IN HPA 1030.9 1030.1 1023.7 1026.2 1019.9 1014.7 1013.1 1014.5 1019.9 1026.6 1026.0 1026.9 1030.9 DAY 3 7 17 9 17 8 31 21 24 17 16 30 MIN. QNH PRESSURE IN HPA 1007.3 1009.0 1003.2 1008.2 1005.5 999.8 1001.3 1002.8 1007.7 1011.6 1012.2 1003.8 999.8 DAY 29 2 5 25 1 30 18 30 12 31 20 27 MEAN QFF PRESSURE IN HPA 1020.6 1018.4 1011.6 1011.2 1006.8 1000.8 997.8 1001.0 1007.8 1015.5 1018.8 1018.7 1010.8 MAX. QFF PRESSURE IN HPA 1034.2 1033.3 1022.8 1026.0 1015.0 1008.1 1005.1 1007.0 1015.5 1023.9 1028.3 1031.2 1034.2 DAY 3 7 17 9 17 8 31 26 24 17 16 30 MIN. QFF PRESSURE IN HPA 1007.9 1006.6 999.8 1002.1 999.7 992.2 992.6 994.7 1001.2 1008.7 1010.3 1002.6 992.2 DAY 29 2 5 25 29 23 18 30 12 31 14 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 922.5 921.3 916.9 918.6 916.2 912.1 909.8 912.2 917.2 922.2 923.3 921.7 917.8 MAX. QFE PRESSURE IN HPA 933.5 933.0 926.5 929.3 922.6 918.0 916.1 917.9 922.7 928.7 928.3 929.2 933.5 DAY 3 7 17 9 17 8 31 21 24 17 6 30 MIN. QFE PRESSURE IN HPA 911.4 913.0 907.8 911.8 911.2 904.1 905.4 907.4 911.5 916.1 916.0 908.0 904.1 DAY 29 2 5 25 1 30 18 4 12 31 20 27 MEAN QNH PRESSURE IN HPA 1020.3 1019.0 1014.2 1016.0 1013.5 1009.0 1006.5 1009.1 1014.6 1019.9 1021.1 1019.4 1015.2 MAX. QNH PRESSURE IN HPA 1032.2 1031.7 1024.6 1027.6 1020.4 1015.4 1013.3 1015.3 1020.5 1027.0 1026.6 1027.5 1032.2 DAY 3 7 17 9 17 8 31 21 24 17 6 30 MIN. QNH PRESSURE IN HPA 1008.2 1010.0 1004.3 1008.7 1008.0 1000.3 1001.7 1003.9 1008.3 1013.3 1013.2 1004.5 1000.3 DAY 29 2 5 25 1 30 18 4 12 31 20 27 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 921.2 920.3 915.9 917.5 915.0 910.9 908.4 910.8 915.8 920.7 921.5 920.0 916.5 MAX. QFE PRESSURE IN HPA 932.1 931.4 925.2 928.1 921.4 917.0 914.3 915.8 921.1 926.8 927.4 927.9 932.1 DAY 3 7 17 9 17 8 31 21 24 16 15 29 MIN. QFE PRESSURE IN HPA 911.0 911.0 907.1 910.8 910.7 903.2 903.2 905.9 909.8 914.3 914.2 904.1 903.2 DAY 29 2 5 25 28 30 18 4 12 30 20 27 MEAN QNH PRESSURE IN HPA 1018.9 1017.9 1013.1 1014.9 1012.1 1007.7 1005.0 1007.6 1013.0 1018.3 1019.2 1017.6 1013.7 MAX. QNH PRESSURE IN HPA 1030.7 1029.9 1023.2 1026.3 1019.1 1014.3 1011.4 1013.0 1018.7 1024.9 1025.6 1026.1 1030.7 DAY 3 7 17 9 17 8 31 21 24 16 15 29 MIN. QNH PRESSURE IN HPA 1007.8 1007.8 1003.6 1007.6 1007.5 999.3 999.3 1002.2 1006.5 1011.4 1011.3 1000.3 999.3 DAY 29 2 5 25 28 30 18 4 12 30 20 27 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 920.2 919.0 914.2 915.8 913.3 909.4 906.7 909.2 914.2 919.5 920.5 919.1 915.1 MAX. QFE PRESSURE IN HPA 930.2 929.7 922.9 925.5 919.4 915.6 912.4 914.0 919.3 926.6 926.8 928.3 930.2 DAY 3 7 17 9 17 8 31 21 24 16 15 29 MIN. QFE PRESSURE IN HPA 911.0 909.1 906.5 908.8 908.4 901.9 901.9 903.7 908.3 912.7 913.1 902.3 901.9 DAY 29 2 5 25 28 30 18 4 12 30 28 27 MEAN QNH PRESSURE IN HPA 1017.8 1016.4 1011.3 1013.0 1010.3 1006.0 1003.1 1005.8 1011.2 1017.0 1018.1 1016.5 1012.2 MAX. QNH PRESSURE IN HPA 1028.6 1028.1 1020.7 1023.5 1016.9 1012.8 1009.3 1011.0 1016.8 1024.7 1024.9 1026.6 1028.6 DAY 3 7 17 9 17 8 31 21 24 16 15 29 MIN. QNH PRESSURE IN HPA 1007.8 1005.7 1002.9 1005.4 1005.0 997.9 997.9 999.9 1004.9 1009.6 1010.1 998.3 997.9 DAY 29 2 5 25 28 30 18 4 12 30 28 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 920.7 919.3 914.3 915.7 913.0 908.9 906.2 908.9 914.3 919.9 921.1 919.8 915.2 MAX. QFE PRESSURE IN HPA 930.5 930.1 922.9 925.7 919.3 915.7 912.4 913.4 919.8 927.5 927.6 929.2 930.5 DAY 3 6 17 8 17 8 30 21 30 16 15 29 MIN. QFE PRESSURE IN HPA 913.6 909.8 907.1 909.0 907.4 901.5 901.3 903.4 908.0 913.1 912.6 905.4 901.3 DAY 29 2 4 23 29 30 17 4 12 30 28 27 MEAN QNH PRESSURE IN HPA 1018.3 1016.8 1011.3 1012.9 1010.0 1005.5 1002.5 1005.5 1011.3 1017.5 1018.7 1017.3 1012.3 MAX. QNH PRESSURE IN HPA 1028.9 1028.5 1020.7 1023.7 1016.8 1012.9 1009.3 1010.4 1017.3 1025.7 1025.8 1027.5 1028.9 DAY 3 6 17 8 17 8 30 21 30 16 15 29 MIN. QNH PRESSURE IN HPA 1010.6 1006.5 1003.6 1005.6 1003.9 997.5 997.3 999.5 1004.5 1010.1 1009.5 1001.7 997.3 DAY 29 2 4 23 29 30 17 4 12 30 28 27 MEAN QFF PRESSURE IN HPA 1020.1 1017.6 1009.8 1009.3 1004.1 997.9 994.3 998.2 1005.6 1014.2 1017.7 1018.0 1008.9 MAX. QFF PRESSURE IN HPA 1032.1 1031.4 1020.1 1022.8 1011.9 1006.4 1001.8 1004.6 1013.5 1022.8 1026.6 1031.2 1032.1 DAY 3 6 25 8 17 8 30 26 30 16 15 29 MIN. QFF PRESSURE IN HPA 1012.0 1003.1 1000.1 999.7 995.9 989.9 988.6 991.2 997.5 1007.1 1009.2 1000.9 988.6 DAY 29 2 4 23 29 30 17 4 12 30 28 27 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 KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.5 5.8 15.9 23.3 27.8 35.2 36.2 33.6 29.3 24.4 16.5 11.1 22.0 MINIMUN AIR TEMPERATURE (C) -2.1 -1.2 8.2 13.9 17.3 24.1 27.0 23.3 18.5 14.1 7.6 2.9 12.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 8 28 31 29 12 0 0 0 109 DAYS WITH MINIMUM TEMP. <=-4 9 10 0 0 0 0 0 0 0 0 0 0 19 DAYS WITH FREEZING MIN.<= 0 25 18 0 0 0 0 0 0 0 0 0 10 53 TEMPERATURE RECORDS LOWEST(C) -8.0 -7.4 3.4 2.8 8.2 19.0 24.0 18.6 9.8 8.8 2.4 -0.6 -8.0 DAY 5 4 13 1 1 2 26 1 24 25 24 9 MAXIMUM AIR TEMPERATURE (C) 9.0 10.6 20.4 27.8 32.4 40.0 40.5 38.5 34.9 30.2 21.6 16.5 26.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 10 21 30 31 31 25 17 0 0 165 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 14.5 19.2 26.6 33.0 41.0 43.4 45.8 42.6 40.0 36.6 26.6 25.4 45.8 DAY 2 28 26 15 26 27 8 4 13 9 29 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 11.8 12.2 13.9 15.1 15.9 13.5 15.2 16.4 16.1 14.0 13.6 14.1 MEAN DAILY TEMP. (MDT) (C) 3.4 4.7 14.3 20.8 24.9 32.1 33.7 30.9 26.7 22.2 14.6 9.7 19.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 41.7 135.7 331.8 394.4 307.0 175.9 57.9 0.0 0.0 1444.4 HEATING DEG. DAYS(BASE 18 0C) 451.6 372.9 117.4 15.6 4.9 0.0 0.0 0.0 0.0 5.0 101.5 254.3 1323.2 DEWPOINT (MEAN C) -6.1 -5.5 -1.2 -2.8 3.3 1.6 6.3 3.2 1.1 1.5 -0.3 -2.4 -0.1 MIXING RATIO (G/KG) 2.77 3.00 4.02 3.50 5.53 4.90 6.77 5.48 4.77 4.73 4.24 3.63 4.45 VAPOUR PRESSURE (HPA) 4.08 4.42 5.88 5.14 8.07 7.12 9.80 7.96 6.96 6.94 6.25 5.34 6.50 SATURATION DEF. (HPA) 4.63 5.23 12.90 24.89 31.67 51.61 51.99 45.83 36.40 25.39 13.24 8.53 26.03 RELATIVE HUMIDITY (MEAN %) 50 48 35 19 23 14 17 17 19 24 34 42 29 RELATIVE HUMIDITY (MAX. %) 70 68 56 31 32 23 28 27 29 34 51 59 42 RELATIVE HUMIDITY (MIN. %) 37 34 23 13 17 9 12 11 12 18 24 30 20 RELATIVE HUMIDITY (MEAN% 03UTC) 69 65 53 31 32 23 28 27 29 34 51 58 42 RELATIVE HUMIDITY (MEAN% 09UTC) 41 40 27 15 19 11 14 13 14 19 27 34 23 RELATIVE HUMIDITY (MEAN% 15UTC) 48 46 32 16 20 10 14 13 16 23 33 40 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.9 25.3 4.6 0.4 0.9 0.0 0.0 0.0 0.0 0.0 5.3 1.8 49.2 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 2 2 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 1 2 4 2 0 0 0 0 0 0 0 3 1 12 DAYS WITH PRECIPITATION 5 6 6 2 2 0 0 0 0 0 4 2 27 GREATEST DAILY PRECIPITATION 5.0 12.2 2.0 0.4 0.8 0.0 0.0 0.0 0.0 0.0 2.0 1.5 12.2 DAY 3 19 16 30 8 ** ** ** ** ** 9 15 DAY WITH THUNDER STORM 0 0 3 0 0 0 0 0 0 0 2 0 5 DAYS WITH SNOW OR SLEET 2 1 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 1 5 1 4 3 12 1 5 4 1 1 38 WIND DIRECTION (PREVAILING) 270 270 270 270 45 45 45 45 45 270 270 270 45 PREVAILING WIND SPEED(KNOTS) 9.7 11.6 11.0 9.4 6.3 7.0 9.7 7.0 6.6 7.0 8.3 8.7 7.1 PREVAILING WIND PERCENT 16.8 12.1 25.2 18.7 12.3 22.7 43.2 38.1 17.9 15.5 15.3 12.3 16.2 CALMS PERCENT OF WIND 49.7 52.9 34.8 36.7 40.0 32.7 19.4 31.6 47.7 56.8 58.0 67.7 43.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 151 155 150 155 1826 VECTOR WIND DIRECTION (MEAN) 292 303 287 320 348 35 41 38 5 330 263 286 352 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.8 3.1 2.0 1.9 2.4 5.7 4.0 1.4 1.1 1.2 1.2 1.5 WIND STEADINESES (MEAN %) 44.1 52.9 55.4 44.4 42.2 45.3 81.4 87.0 43.7 39.3 44.4 60.0 36.6 WIND SPEED (MEAN KNOTS) 3.4 3.4 5.6 4.5 4.5 5.3 7.0 4.6 3.2 2.8 2.7 2.0 4.1 FASTEST WIND DIRECTION 270 270 270 270 270 270 80 10 30 280 270 270 270 FASTEST WIND SPEED (KNOTS) 23 23 49 17 29 25 19 16 19 23 23 35 49 DAY 12 15 30 16 7 1 15 8 19 31 2 5 DAYS WITH SKY CLEAR (0-2)/8 18 13 14 17 23 28 31 31 30 27 20 18 270 DAYS WITH P.CLOUDY (3-6)/8 8 10 13 11 6 2 0 0 0 4 6 10 70 DAYS WITH CLOUDY (7-8)/8 5 5 4 2 2 0 0 0 0 0 4 3 25 DAYS WITH VISIBILITY =< 2 KM 1 0 1 0 2 2 0 0 1 0 0 1 8 DURATION OF SUNSHINE HOURS 252.9 211.0 252.3 278.9 326.6 356.4 354.2 355.7 317.7 297.3 238.0 218.2 3459.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 921.3 923.2 916.3 918.1 916.4 910.8 911.1 912.4 915.0 920.3 922.2 920.6 917.3 MAX. QFE PRESSURE IN HPA 931.2 932.9 924.0 924.8 925.3 917.6 917.6 918.7 928.1 929.2 928.6 927.0 932.9 DAY-HOUR 27- 6 4- 6 8- 6 2- 6 1- 6 2- 6 20- 3 19- 6 23- 6 27- 6 22- 6 18- 6 MIN. QFE PRESSURE IN HPA 911.3 910.1 904.7 909.7 906.8 904.4 904.6 905.0 906.9 912.0 917.0 910.3 904.4 DAY-HOUR 17- 3 23- 3 29-12 29-12 31-15 10-15 6-15 1-15 12-15 1-15 16-12 5- 9 MEAN QNH PRESSURE IN HPA 1019.0 1021.0 1013.6 1015.5 1013.7 1007.6 1007.9 1009.3 1012.1 1017.9 1020.0 1018.2 1014.6 MAX. QNH PRESSURE IN HPA 1029.7 1031.6 1021.9 1022.8 1023.3 1014.9 1014.9 1016.1 1026.3 1027.5 1026.9 1025.2 1031.6 DAY-HOUR 27- 6 4- 6 8- 6 2- 6 1- 6 2- 6 20- 3 19- 6 23- 6 27- 6 22- 6 18- 6 MIN. QNH PRESSURE IN HPA 1008.1 1006.8 1000.9 1006.4 1003.2 1000.6 1000.8 1001.3 1003.3 1008.9 1014.3 1007.0 1000.6 DAY-HOUR 17- 3 23- 3 29-12 29-12 31-15 10-15 6-15 1-15 12-15 1-15 16-12 5- 9 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 921.3 923.2 916.7 918.8 917.4 911.9 912.2 913.2 915.7 920.8 922.7 920.7 917.9 MAX. QFE PRESSURE IN HPA 929.6 931.3 922.3 923.8 925.2 917.3 917.6 918.5 927.2 927.9 927.6 925.6 931.3 DAY 27 4 8 2 1 2 20 19 23 27 22 19 MIN. QFE PRESSURE IN HPA 911.3 910.1 905.9 912.7 911.5 907.7 906.5 907.7 908.0 913.6 917.3 912.7 905.9 DAY 17 23 30 29 27 11 7 2 12 2 20 5 MEAN QNH PRESSURE IN HPA 1019.0 1021.0 1013.9 1016.3 1014.8 1008.8 1009.1 1010.2 1012.9 1018.5 1020.5 1018.4 1015.3 MAX. QNH PRESSURE IN HPA 1028.0 1029.8 1020.0 1021.7 1023.2 1014.6 1014.9 1015.9 1025.4 1026.1 1025.8 1023.6 1029.8 DAY 27 4 8 2 1 2 20 19 23 27 22 19 MIN. QNH PRESSURE IN HPA 1008.1 1006.8 1002.2 1009.6 1008.3 1004.2 1002.9 1004.2 1004.5 1010.6 1014.6 1009.6 1002.2 DAY 17 23 30 29 27 11 7 2 12 2 20 5 MEAN QFF PRESSURE IN HPA 1021.8 1023.5 1012.6 1012.6 1009.5 1001.1 1000.8 1003.1 1007.4 1014.9 1019.4 1019.0 1012.1 MAX. QFF PRESSURE IN HPA 1031.5 1034.4 1019.7 1020.5 1021.2 1008.3 1006.9 1009.6 1022.6 1024.2 1026.0 1025.6 1034.4 DAY 27 4 1 2 1 2 20 20 23 25 22 19 MIN. QFF PRESSURE IN HPA 1010.2 1006.2 1000.0 1003.3 1001.0 996.0 994.1 996.8 997.9 1006.0 1013.1 1008.9 994.1 DAY 17 23 30 29 27 11 7 2 12 2 20 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 922.8 924.4 917.9 919.7 918.0 912.4 912.6 914.0 916.7 921.9 923.8 921.9 918.8 MAX. QFE PRESSURE IN HPA 931.2 932.9 924.0 924.8 925.3 917.6 917.3 918.7 928.1 929.2 928.6 927.0 932.9 DAY 27 4 8 2 1 2 20 19 23 27 22 18 MIN. QFE PRESSURE IN HPA 913.6 912.7 908.8 912.7 912.4 907.8 907.7 908.3 909.3 914.9 919.4 912.5 907.7 DAY 12 23 30 29 27 10 6 1 12 2 20 5 MEAN QNH PRESSURE IN HPA 1020.6 1022.4 1015.2 1017.3 1015.3 1009.3 1009.5 1011.1 1014.0 1019.6 1021.7 1019.6 1016.3 MAX. QNH PRESSURE IN HPA 1029.7 1031.6 1021.9 1022.8 1023.3 1014.9 1014.6 1016.1 1026.3 1027.5 1026.9 1025.2 1031.6 DAY 27 4 8 2 1 2 20 19 23 27 22 18 MIN. QNH PRESSURE IN HPA 1010.6 1009.6 1005.4 1009.6 1009.3 1004.3 1004.2 1004.9 1005.9 1012.0 1016.9 1009.4 1004.2 DAY 12 23 30 29 27 10 6 1 12 2 20 5 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 921.5 923.4 916.8 918.6 916.7 911.0 911.4 912.7 915.2 920.3 922.1 920.2 917.5 MAX. QFE PRESSURE IN HPA 929.1 931.3 922.5 923.7 923.3 915.4 915.8 917.0 926.5 927.2 926.1 925.8 931.3 DAY 27 4 7 8 1 2 20 20 23 27 8 18 MIN. QFE PRESSURE IN HPA 912.7 913.2 906.7 912.1 911.1 906.7 906.6 907.0 908.2 914.1 918.0 910.3 906.6 DAY 12 14 28 29 31 10 7 1 12 1 16 5 MEAN QNH PRESSURE IN HPA 1019.1 1021.3 1014.0 1016.0 1014.0 1007.8 1008.2 1009.6 1012.4 1017.9 1019.8 1017.8 1014.8 MAX. QNH PRESSURE IN HPA 1027.4 1029.8 1020.3 1021.6 1021.1 1012.6 1013.0 1014.3 1024.6 1025.4 1024.2 1023.8 1029.8 DAY 27 4 7 8 1 2 20 20 23 27 8 18 MIN. QNH PRESSURE IN HPA 1009.6 1010.2 1003.1 1009.0 1007.9 1003.1 1003.0 1003.4 1004.7 1011.1 1015.4 1007.0 1003.0 DAY 12 14 28 29 31 10 7 1 12 1 16 5 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 920.4 922.3 915.1 916.8 915.1 909.6 909.8 911.2 913.7 919.0 921.0 919.5 916.1 MAX. QFE PRESSURE IN HPA 927.1 929.3 920.8 922.0 921.6 912.9 914.0 915.4 925.2 925.8 924.9 925.6 929.3 DAY 30 4 7 8 1 2 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA 912.3 913.3 904.7 909.7 908.2 905.3 905.2 905.2 907.1 912.2 917.0 913.2 904.7 DAY 17 23 29 29 31 10 6 1 12 1 16 5 MEAN QNH PRESSURE IN HPA 1017.9 1020.0 1012.2 1014.1 1012.2 1006.2 1006.5 1008.0 1010.8 1016.5 1018.7 1017.0 1013.3 MAX. QNH PRESSURE IN HPA 1025.3 1027.6 1018.4 1019.7 1019.3 1009.8 1011.0 1012.6 1023.2 1023.8 1022.9 1023.6 1027.6 DAY 30 4 7 8 1 2 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA 1009.2 1010.3 1000.9 1006.4 1004.7 1001.6 1001.5 1001.5 1003.6 1009.1 1014.3 1010.2 1000.9 DAY 17 23 29 29 31 10 6 1 12 1 16 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 KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 920.8 922.8 915.4 916.8 915.0 909.3 909.6 911.1 913.7 919.5 921.7 920.5 916.3 MAX. QFE PRESSURE IN HPA 927.4 929.1 921.0 922.1 921.6 912.5 914.0 915.4 925.2 926.0 925.4 926.6 929.1 DAY 30 4 7 8 1 2 20 19 23 24 8 18 MIN. QFE PRESSURE IN HPA 913.5 913.3 905.1 909.7 906.8 904.4 904.6 905.0 906.9 912.0 918.0 916.4 904.4 DAY 17 22 29 29 31 10 6 1 12 1 16 5 MEAN QNH PRESSURE IN HPA 1018.5 1020.5 1012.5 1014.0 1012.1 1006.0 1006.2 1007.9 1010.7 1017.0 1019.4 1018.1 1013.6 MAX. QNH PRESSURE IN HPA 1025.6 1027.4 1018.6 1019.8 1019.3 1009.4 1011.0 1012.6 1023.2 1024.1 1023.4 1024.7 1027.4 DAY 30 4 7 8 1 2 20 19 23 24 8 18 MIN. QNH PRESSURE IN HPA 1010.5 1010.3 1001.4 1006.4 1003.2 1000.6 1000.8 1001.3 1003.3 1008.9 1015.4 1013.6 1000.6 DAY 17 22 29 29 31 10 6 1 12 1 16 5 MEAN QFF PRESSURE IN HPA 1021.3 1023.0 1011.2 1010.3 1006.7 998.3 998.0 1000.8 1005.2 1013.4 1018.2 1018.8 1010.4 MAX. QFF PRESSURE IN HPA 1030.1 1031.9 1017.7 1017.7 1017.6 1003.0 1003.4 1006.5 1020.4 1022.4 1023.7 1026.4 1031.9 DAY 30 4 31 2 1 2 20 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1012.4 1010.3 999.0 1000.5 995.5 992.9 992.0 994.4 996.7 1004.1 1013.3 1012.4 992.0 DAY 17 22 29 29 31 10 6 1 12 1 16 4 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 KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.9 9.0 15.0 22.2 30.5 35.4 34.8 34.8 31.2 22.7 17.4 9.5 22.4 MINIMUN AIR TEMPERATURE (C) 0.4 2.2 7.0 13.4 20.0 24.5 25.7 25.0 20.7 13.3 7.5 2.4 13.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 12 26 31 31 15 0 0 0 117 DAYS WITH MINIMUM TEMP. <=-4 2 0 0 0 0 0 0 0 0 0 0 1 3 DAYS WITH FREEZING MIN.<= 0 13 5 3 0 0 0 0 0 0 0 0 5 26 TEMPERATURE RECORDS LOWEST(C) -4.2 -2.0 -2.2 7.0 14.6 19.0 21.6 22.0 16.4 6.6 3.2 -4.4 -4.4 DAY 13 8 21 9 15 3 13 15 19 20 25 29 MAXIMUM AIR TEMPERATURE (C) 10.1 13.8 20.2 27.2 35.6 40.2 39.6 40.4 37.1 28.5 23.6 14.7 27.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 9 28 30 31 31 30 10 2 0 171 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.4 23.2 27.6 35.2 41.0 44.8 42.2 45.0 42.2 36.2 30.2 22.0 45.0 DAY 1 20 13 27 25 29 28 10 1 1 10 4 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 11.6 13.2 13.8 15.6 15.7 13.9 15.4 16.4 15.2 16.1 12.3 14.1 MEAN DAILY TEMP. (MDT) (C) 5.3 8.0 13.6 20.3 27.8 32.3 32.6 32.7 28.9 20.9 15.6 8.5 20.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.8 37.2 209.9 340.5 361.0 362.6 236.2 35.7 0.6 0.0 1585.6 HEATING DEG. DAYS(BASE 18 0C) 394.4 281.0 147.8 13.3 0.0 0.0 0.0 0.0 0.0 12.7 89.7 294.1 1233.0 DEWPOINT (MEAN C) -2.2 -3.8 -3.7 -0.6 2.1 4.2 8.2 6.0 3.4 0.3 -1.3 -3.2 0.8 MIXING RATIO (G/KG) 3.67 3.25 3.33 4.18 5.00 5.87 7.59 6.65 5.50 4.41 3.89 3.33 4.72 VAPOUR PRESSURE (HPA) 5.40 4.76 4.90 6.10 7.29 8.50 10.97 9.63 8.01 6.48 5.74 4.91 6.89 SATURATION DEF. (HPA) 4.16 7.27 13.35 22.21 38.19 50.68 46.18 48.04 39.45 22.65 15.45 7.76 26.28 RELATIVE HUMIDITY (MEAN %) 59 44 30 25 18 15 21 19 18 25 30 44 29 RELATIVE HUMIDITY (MAX. %) 78 68 47 40 30 23 30 30 27 37 43 61 43 RELATIVE HUMIDITY (MIN. %) 43 29 20 16 12 11 15 12 13 17 22 32 20 RELATIVE HUMIDITY (MEAN% 03UTC) 76 65 46 38 30 23 30 30 27 37 43 60 42 RELATIVE HUMIDITY (MEAN% 09UTC) 50 35 24 21 15 13 17 15 15 19 24 36 24 RELATIVE HUMIDITY (MEAN% 15UTC) 60 44 27 20 13 13 17 14 17 24 29 45 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 26.2 13.4 2.3 5.9 0.3 0.0 0.0 0.0 0.0 0.0 0.0 12.0 60.1 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH PRECIPITATION >= 5 3 1 0 0 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 1 5 5 0 2 0 0 0 0 0 0 0 1 13 DAYS WITH PRECIPITATION 10 5 4 4 1 0 2 1 0 0 0 2 29 GREATEST DAILY PRECIPITATION 9.0 5.0 1.0 3.8 0.3 0.0 0.0 0.0 0.0 0.0 0.0 12.0 12.0 DAY 2 16 30 11 13 ** ** ** ** ** ** 26 DAY WITH THUNDER STORM 0 2 1 1 0 0 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 3 1 0 0 0 0 0 0 0 0 0 2 6 DAYS WITH DUST 1 2 5 7 7 7 9 8 4 4 0 0 54 WIND DIRECTION (PREVAILING) 270 270 270 270 360 45 45 45 45 270 270 270 45 PREVAILING WIND SPEED(KNOTS) 7.1 8.2 7.6 7.8 6.8 7.9 9.8 6.8 7.1 7.4 5.9 4.9 7.6 PREVAILING WIND PERCENT 12.9 15.7 19.4 24.7 16.1 26.0 54.8 40.6 22.0 15.5 13.3 14.2 16.8 CALMS PERCENT OF WIND 65.8 59.3 30.3 32.0 31.0 27.3 12.9 29.7 50.7 49.7 67.3 53.5 42.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 302 282 329 272 333 30 31 35 51 308 278 315 2 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.5 1.8 2.4 1.8 2.6 7.6 4.2 2.3 1.1 0.7 0.6 1.6 WIND STEADINESES (MEAN %) 55.0 53.6 36.7 48.0 36.0 44.8 91.6 85.7 71.9 33.3 46.7 28.6 39.0 WIND SPEED (MEAN KNOTS) 2.0 2.8 4.9 5.0 5.0 5.8 8.3 4.9 3.2 3.3 1.5 2.1 4.1 FASTEST WIND DIRECTION 270 270 260 210 270 300 40 50 30 320 270 350 270 FASTEST WIND SPEED (KNOTS) 16 19 23 27 29 25 29 19 17 23 16 12 29 DAY 26 16 25 29 13 16 12 26 2 29 1 25 DAYS WITH SKY CLEAR (0-2)/8 13 12 17 12 25 29 28 30 30 27 21 12 256 DAYS WITH P.CLOUDY (3-6)/8 12 12 9 13 6 1 3 1 0 4 8 17 86 DAYS WITH CLOUDY (7-8)/8 6 4 5 5 0 0 0 0 0 0 1 2 23 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 1 2 0 0 0 0 1 4 DURATION OF SUNSHINE HOURS 193.3 ****** 270.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 922.1 918.4 920.8 915.2 913.7 910.4 909.9 911.1 914.3 920.7 922.5 922.3 916.8 MAX. QFE PRESSURE IN HPA 931.2 930.0 932.2 922.6 922.0 918.6 916.0 916.5 919.6 931.9 931.9 933.0 933.0 DAY-HOUR 26- 6 8- 6 10- 6 25- 6 15- 6 1- 6 15- 6 3- 6 24- 6 19- 6 14- 6 28- 6 MIN. QFE PRESSURE IN HPA 914.8 906.9 911.5 904.5 901.8 902.2 901.4 905.3 908.0 910.8 913.6 910.1 901.4 DAY-HOUR 23-12 15-15 24-15 15-15 12-15 27-15 4-15 9-15 1-15 1-12 1-12 25- 9 MEAN QNH PRESSURE IN HPA 1019.8 1015.9 1018.4 1012.3 1010.7 1007.2 1006.6 1007.9 1011.3 1018.3 1020.2 1020.0 1014.1 MAX. QNH PRESSURE IN HPA 1029.7 1028.4 1030.8 1020.4 1019.7 1016.0 1013.2 1013.8 1017.1 1030.5 1030.5 1031.7 1031.7 DAY-HOUR 26- 6 8- 6 10- 6 25- 6 15- 6 1- 6 15- 6 3- 6 24- 6 19- 6 14- 6 28- 6 MIN. QNH PRESSURE IN HPA 1011.9 1003.3 1008.3 1000.7 997.8 998.2 997.4 1001.6 1004.5 1007.6 1010.6 1006.8 997.4 DAY-HOUR 23-12 15-15 24-15 15-15 12-15 27-15 4-15 9-15 1-15 1-12 1-12 25- 9 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 922.2 918.8 921.4 916.0 915.0 911.5 911.1 912.3 915.0 921.2 922.7 922.4 917.5 MAX. QFE PRESSURE IN HPA 930.2 929.1 930.7 921.7 921.7 918.3 915.8 915.9 918.6 931.0 930.6 932.0 932.0 DAY 27 8 10 25 15 1 17 3 24 19 14 28 MIN. QFE PRESSURE IN HPA 915.4 907.9 913.8 909.7 906.0 904.4 906.2 907.7 912.2 913.5 914.1 911.9 904.4 DAY 23 16 25 16 13 27 4 10 4 2 1 25 MEAN QNH PRESSURE IN HPA 1019.9 1016.3 1019.0 1013.3 1012.1 1008.4 1007.9 1009.2 1012.1 1018.9 1020.5 1020.1 1014.8 MAX. QNH PRESSURE IN HPA 1028.6 1027.4 1029.2 1019.4 1019.4 1015.7 1013.0 1013.1 1016.0 1029.5 1029.1 1030.6 1030.6 DAY 27 8 10 25 15 1 17 3 24 19 14 28 MIN. QNH PRESSURE IN HPA 1012.6 1004.4 1010.8 1006.4 1002.4 1000.6 1002.6 1004.2 1009.1 1010.5 1011.1 1008.8 1000.6 DAY 23 16 25 16 13 27 4 10 4 2 1 25 MEAN QFF PRESSURE IN HPA 1022.0 1017.5 1018.2 1009.8 1005.7 1000.5 1000.1 1001.4 1006.0 1015.7 1019.4 1021.3 1011.5 MAX. QFF PRESSURE IN HPA 1032.4 1030.4 1030.8 1016.2 1015.1 1009.7 1005.1 1006.1 1010.4 1028.6 1028.3 1034.4 1034.4 DAY 27 8 21 25 15 1 13 30 28 19 23 28 MIN. QFF PRESSURE IN HPA 1013.5 1003.5 1007.5 1001.6 995.4 991.9 994.3 995.4 1002.5 1005.9 1007.6 1010.1 991.9 DAY 5 16 25 16 13 27 4 10 1 2 1 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 923.5 919.9 922.6 917.0 915.5 912.1 911.6 912.9 916.0 922.3 923.9 923.5 918.4 MAX. QFE PRESSURE IN HPA 931.2 930.0 932.2 922.6 922.0 918.6 916.0 916.5 919.6 931.9 931.9 933.0 933.0 DAY 26 8 10 25 15 1 15 3 24 19 14 28 MIN. QFE PRESSURE IN HPA 915.4 909.8 915.8 910.0 907.4 905.3 906.3 908.7 912.8 914.6 915.3 911.8 905.3 DAY 23 16 25 16 12 27 4 10 5 2 1 25 MEAN QNH PRESSURE IN HPA 1021.3 1017.5 1020.4 1014.3 1012.7 1009.0 1008.4 1009.9 1013.2 1020.0 1021.7 1021.4 1015.8 MAX. QNH PRESSURE IN HPA 1029.7 1028.4 1030.8 1020.4 1019.7 1016.0 1013.2 1013.8 1017.1 1030.5 1030.5 1031.7 1031.7 DAY 26 8 10 25 15 1 15 3 24 19 14 28 MIN. QNH PRESSURE IN HPA 1012.6 1006.5 1013.0 1006.7 1003.9 1001.6 1002.7 1005.3 1009.7 1011.7 1012.5 1008.7 1001.6 DAY 23 16 25 16 12 27 4 10 5 2 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 922.0 918.6 921.2 915.6 914.1 910.8 910.2 911.4 914.6 920.7 922.5 922.2 917.0 MAX. QFE PRESSURE IN HPA 930.1 928.8 930.2 921.7 920.3 916.6 914.7 915.2 918.2 930.1 930.5 932.0 932.0 DAY 26 8 10 24 15 1 15 3 26 19 14 28 MIN. QFE PRESSURE IN HPA 915.4 910.5 915.7 908.0 905.4 904.1 904.5 907.5 910.9 913.2 914.7 910.1 904.1 DAY 23 10 14 16 12 27 4 10 1 1 1 25 MEAN QNH PRESSURE IN HPA 1019.7 1016.1 1018.8 1012.8 1011.1 1007.6 1006.9 1008.3 1011.6 1018.3 1020.3 1019.9 1014.3 MAX. QNH PRESSURE IN HPA 1028.5 1027.1 1028.6 1019.4 1017.9 1013.9 1011.8 1012.3 1015.6 1028.5 1028.9 1030.6 1030.6 DAY 26 8 10 24 15 1 15 3 26 19 14 28 MIN. QNH PRESSURE IN HPA 1012.6 1007.2 1012.9 1004.5 1001.7 1000.3 1000.7 1004.0 1007.7 1010.2 1011.8 1006.8 1000.3 DAY 23 10 14 16 12 27 4 10 1 1 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 921.0 917.2 919.3 913.8 912.2 909.1 908.5 909.6 913.0 919.5 921.4 921.2 915.5 MAX. QFE PRESSURE IN HPA 930.1 926.9 927.5 920.3 918.8 914.9 913.2 913.4 917.3 928.5 929.3 930.7 930.7 DAY 26 8 10 24 15 1 15 3 27 19 14 28 MIN. QFE PRESSURE IN HPA 914.8 907.4 912.6 905.2 902.8 902.7 902.3 905.4 908.6 910.8 913.6 911.2 902.3 DAY 23 10 24 16 12 27 4 10 1 1 1 25 MEAN QNH PRESSURE IN HPA 1018.6 1014.5 1016.8 1010.8 1009.1 1005.7 1005.1 1006.3 1009.9 1017.0 1019.1 1018.9 1012.6 MAX. QNH PRESSURE IN HPA 1028.5 1025.0 1025.7 1017.9 1016.2 1012.0 1010.2 1010.4 1014.6 1026.8 1027.6 1029.2 1029.2 DAY 26 8 10 24 15 1 15 3 27 19 14 28 MIN. QNH PRESSURE IN HPA 1011.9 1003.9 1009.5 1001.5 998.9 998.8 998.3 1001.7 1005.2 1007.6 1010.6 1008.0 998.3 DAY 23 10 24 16 12 27 4 10 1 1 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 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 921.8 917.7 919.5 913.6 911.9 908.7 908.3 909.4 913.0 919.8 922.0 922.0 915.6 MAX. QFE PRESSURE IN HPA 930.4 927.0 927.1 920.3 919.1 914.8 912.8 913.1 917.6 928.6 929.9 931.1 931.1 DAY 26 7 9 24 15 1 15 3 27 18 22 28 MIN. QFE PRESSURE IN HPA 915.5 906.9 911.5 904.5 901.8 902.2 901.4 905.3 908.0 911.0 914.1 914.7 901.4 DAY 17 15 24 15 12 27 4 9 1 1 1 25 MEAN QNH PRESSURE IN HPA 1019.5 1015.1 1017.0 1010.6 1008.8 1005.3 1004.9 1006.0 1009.9 1017.3 1019.8 1019.7 1012.8 MAX. QNH PRESSURE IN HPA 1028.8 1025.2 1025.3 1017.9 1016.6 1011.9 1009.7 1010.1 1014.9 1026.9 1028.3 1029.6 1029.6 DAY 26 7 9 24 15 1 15 3 27 18 22 28 MIN. QNH PRESSURE IN HPA 1012.7 1003.3 1008.3 1000.7 997.8 998.2 997.4 1001.6 1004.5 1007.8 1011.1 1011.8 997.4 DAY 17 15 24 15 12 27 4 9 1 1 1 25 MEAN QFF PRESSURE IN HPA 1021.6 1016.1 1016.1 1007.1 1002.4 997.3 997.0 998.3 1003.8 1014.1 1018.6 1021.0 1009.5 MAX. QFF PRESSURE IN HPA 1031.8 1028.0 1027.1 1014.5 1012.2 1005.7 1001.5 1002.4 1009.6 1025.7 1028.2 1033.2 1033.2 DAY 26 8 17 24 15 1 15 3 27 18 14 28 MIN. QFF PRESSURE IN HPA 1013.6 1003.2 1006.2 996.8 990.1 989.1 989.0 992.9 997.0 1002.6 1007.5 1013.8 989.0 DAY 1 15 24 15 12 27 4 10 1 1 1 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION KHOOR BIABANAK (40789) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 47 N LONGITUDE 55 5 E DATA PROCESSING CENTER ELEVATION 845.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.2 8.2 14.4 23.7 26.9 32.7 34.7 33.1 26.9 20.8 13.6 8.2 20.9 MINIMUN AIR TEMPERATURE (C) 2.0 1.8 8.5 14.8 17.9 22.6 25.1 23.3 19.0 13.3 7.1 3.3 13.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 7 25 30 27 11 0 0 0 101 DAYS WITH MINIMUM TEMP. <=-4 0 3 0 0 0 0 0 0 0 0 0 1 4 DAYS WITH FREEZING MIN.<= 0 10 11 0 0 0 0 0 0 0 0 0 10 31 TEMPERATURE RECORDS LOWEST(C) -2.0 -6.6 1.6 8.0 10.4 19.8 20.4 18.6 11.0 9.4 1.0 -5.0 -6.6 DAY 9 14 12 14 5 2 15 24 28 31 29 20 MAXIMUM AIR TEMPERATURE (C) 11.1 12.6 18.7 28.4 31.5 37.5 39.7 38.5 34.5 27.5 20.7 13.7 26.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 12 19 30 30 31 23 3 0 0 148 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.4 19.8 26.0 35.0 39.4 42.4 44.6 44.2 42.0 31.0 29.6 23.0 44.6 DAY 31 27 25 22 30 28 7 7 8 27 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 9.1 10.8 10.2 13.6 13.6 14.9 14.6 15.2 15.5 14.2 13.6 10.4 13.0 MEAN DAILY TEMP. (MDT) (C) 6.5 7.2 13.6 21.6 24.7 30.1 32.4 30.9 26.8 20.4 13.9 8.5 19.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 55.2 128.0 271.7 342.4 306.5 184.6 6.7 0.0 0.0 1295.2 HEATING DEG. DAYS(BASE 18 0C) 355.4 302.1 141.8 8.6 2.0 0.0 0.0 0.0 1.0 1.7 134.8 294.1 1241.5 DEWPOINT (MEAN C) 0.1 -4.6 1.8 -0.2 2.8 2.9 7.4 6.8 3.5 3.4 -0.1 -0.9 1.9 MIXING RATIO (G/KG) 4.30 3.20 5.13 4.29 5.37 5.46 7.29 7.32 5.59 5.45 4.27 4.05 5.14 VAPOUR PRESSURE (HPA) 6.32 4.70 7.49 6.27 7.81 7.93 10.53 10.58 8.17 8.00 6.28 5.94 7.50 SATURATION DEF. (HPA) 4.11 6.82 9.57 24.49 29.40 43.07 46.29 41.91 29.78 17.38 10.34 5.70 22.41 RELATIVE HUMIDITY (MEAN %) 64 43 46 23 25 17 20 22 25 34 42 56 35 RELATIVE HUMIDITY (MAX. %) 83 63 67 37 39 29 30 35 38 48 57 72 50 RELATIVE HUMIDITY (MIN. %) 48 30 33 15 17 11 15 15 15 23 28 40 24 RELATIVE HUMIDITY (MEAN% 03UTC) 82 59 66 37 39 29 30 32 36 46 53 65 48 RELATIVE HUMIDITY (MEAN% 09UTC) 54 35 39 18 21 14 16 18 18 25 31 46 28 RELATIVE HUMIDITY (MEAN% 15UTC) 64 43 40 20 19 12 17 17 18 28 37 54 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 21.0 6.6 13.3 1.3 31.4 0.0 0.0 0.0 0.0 4.0 0.9 23.0 101.5 DAYS WITH PRECIPITATION >=10 0 0 0 0 1 0 0 0 0 0 0 1 2 DAYS WITH PRECIPITATION >= 5 1 1 1 0 1 0 0 0 0 0 0 2 6 DAYS WITH PRECIPITATION >= 1 5 1 4 1 3 0 0 0 0 2 0 2 18 DAYS WITH PRECIPITATION 9 6 11 6 5 0 0 0 0 4 1 7 49 GREATEST DAILY PRECIPITATION 8.2 6.0 6.2 1.0 25.0 0.0 0.0 0.0 0.0 2.0 0.9 12.0 25.0 DAY 3 22 6 5 5