STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 **** 87 124 130 155 150 155 155 150 **** 139 133 1378 VECTOR WIND DIRECTION (MEAN) *** *** 303 244 227 259 224 18 249 *** 211 219 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** 1.3 1.5 3.7 1.5 0.4 0.5 2.0 **** 1.6 3.4 **** WIND STEADINESES (MEAN %) ***** ***** 22.8 34.9 77.1 40.5 13.3 13.9 52.6 ***** 45.7 64.2 ***** WIND SPEED (MEAN KNOTS) **** **** 5.7 4.3 4.8 3.7 3.0 3.6 3.8 **** 3.5 5.3 **** FASTEST WIND DIRECTION *** *** 260 250 110 40 270 210 250 *** 260 250 *** FASTEST WIND SPEED (KNOTS) *** *** 29 19 19 19 19 23 23 *** 23 39 *** DAY ** ** 1 11 25 7 30 22 25 ** 1 22 DAYS WITH SKY CLEAR (0-2)/8 **** 7 4 1 13 22 25 22 23 **** 6 12 **** DAYS WITH P.CLOUDY (3-6)/8 **** 7 11 11 14 8 6 9 7 **** 9 11 **** DAYS WITH CLOUDY (7-8)/8 **** 12 16 18 4 0 0 0 0 **** 15 8 **** DAYS WITH VISIBILITY =< 2 KM **** 2 1 5 2 0 0 0 0 **** 5 9 **** DURATION OF SUNSHINE HOURS ****** 115.8 95.0 103.9 278.2 312.0 301.5 300.5 232.6 ****** 83.7 110.2 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1986 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 ****** ****** ****** ****** 854.9 853.3 855.0 856.8 859.8 ****** 858.0 ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 861.6 860.0 858.4 860.0 863.0 ****** 864.4 ****** ****** DAY ** ** ** ** 19 2 22 24 23 ** 16 ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 846.7 849.0 851.0 853.0 856.0 ****** 849.5 ****** ****** DAY ** ** ** ** 3 21 20 22 6 ** 30 ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.3 1016.5 1018.4 1020.5 1024.0 ****** 1021.9 ****** ****** MAX. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** 855.3 856.2 856.2 854.9 853.0 854.9 856.5 859.7 ****** 857.9 858.2 ****** MAX. QFE PRESSURE IN HPA ****** 862.6 863.5 861.5 862.0 860.2 858.0 859.7 863.0 ****** 865.0 867.3 ****** DAY ** 22 27 5 19 2 31 30 23 ** 15 7 MIN. QFE PRESSURE IN HPA ****** 846.7 850.0 851.5 846.8 848.2 850.6 852.8 856.0 ****** 849.0 843.5 ****** DAY ** 6 31 10 3 21 24 22 6 ** 7 27 MEAN QNH PRESSURE IN HPA ****** 1018.8 1019.8 1019.8 1018.4 1016.1 1018.3 1020.2 1023.9 ****** 1021.8 1022.2 ****** MAX. QNH PRESSURE IN HPA ****** 1027.2 1028.3 1026.0 1026.5 1024.5 1021.9 1023.9 1027.7 ****** 1030.0 1032.6 ****** DAY ** 22 27 5 19 2 31 30 23 ** 15 7 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 ****** ****** 855.0 855.1 854.1 851.8 853.3 855.0 858.3 ****** 857.3 858.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** 861.5 860.2 860.0 859.1 857.0 858.8 862.0 ****** 864.5 867.0 ****** DAY ** ** 27 4 19 2 31 24 23 ** 15 6 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.3 ***** 4.2 12.5 21.1 25.9 28.3 27.8 23.9 ***** ***** ***** ***** MINIMUN AIR TEMPERATURE (C) -1.9 0.6 -1.1 3.6 9.1 11.4 15.8 14.3 10.8 5.7 2.2 -1.5 5.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 1 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 12 4 6 0 0 0 0 0 0 0 2 8 32 DAYS WITH FREEZING MIN.<= 0 26 10 19 7 0 0 0 0 0 0 10 18 90 TEMPERATURE RECORDS LOWEST(C) -7.4 -9.0 -8.0 -3.5 2.5 7.0 12.0 9.2 5.5 1.0 -7.0 -17.0 -17.0 DAY 12 11 20 21 4 6 9 25 24 12 30 31 MAXIMUM AIR TEMPERATURE (C) 7.6 8.6 6.8 15.2 24.1 29.1 31.4 30.8 27.3 15.9 ***** 6.7 ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 20 22 6 0 **** 0 **** DAYS WITH MAXIMUM TEMP. <= 0 0 0 1 0 0 0 0 0 0 0 **** 1 **** TEMPERATURE RECORDS HIGHEST(C) 14.8 16.6 12.5 25.0 27.8 33.4 35.6 34.8 31.4 27.6 ***** 11.2 ***** DAY 17 3 24 30 8 24 15 11 9 2 ** 11 DIF. BETWEEN (MAX.-MIN.) (C) 9.5 8.0 7.9 11.6 15.0 17.7 15.6 16.5 16.5 10.2 ***** 8.2 ***** MEAN DAILY TEMP. (MDT) (C) 2.9 4.6 2.9 9.4 16.6 20.2 23.6 22.5 19.0 10.8 ***** 2.6 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 16.0 79.6 61.6 4.0 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 469.5 375.1 469.3 256.8 49.8 1.0 0.0 0.0 12.1 169.1 81.9 290.6 ****** DEWPOINT (MEAN C) -3.5 ***** -2.3 0.2 6.1 ***** 7.1 7.5 7.6 ***** ***** ***** ***** MIXING RATIO (G/KG) 3.51 ****** 3.90 4.73 7.16 ****** 7.65 7.78 7.74 ****** ****** ****** ****** VAPOUR PRESSURE (HPA) 4.81 ****** 5.30 6.44 9.74 ****** 10.37 10.55 10.54 ****** ****** ****** ****** SATURATION DEF. (HPA) 3.74 ****** 3.14 8.60 15.61 ****** 28.69 27.57 19.83 ****** ****** ****** ****** RELATIVE HUMIDITY (MEAN %) 61 *** 65 46 40 *** 28 30 37 *** *** *** *** RELATIVE HUMIDITY (MAX. %) 79 85 79 64 55 40 35 39 48 64 58 87 61 RELATIVE HUMIDITY (MIN. %) 49 58 54 35 30 22 22 24 29 44 25 66 38 RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** *** *** *** *** *** RELATIVE HUMIDITY (MEAN% 09UTC) 58 70 65 41 38 28 29 29 37 51 31 73 46 RELATIVE HUMIDITY (MEAN% 15UTC) 55 67 66 44 35 24 23 25 31 50 *** 72 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 34.0 126.0 152.9 67.7 15.0 3.0 0.0 0.0 0.0 167.0 43.0 342.8 951.4 DAYS WITH PRECIPITATION >=10 1 6 7 2 0 0 0 0 0 8 2 11 37 DAYS WITH PRECIPITATION >= 5 3 8 12 3 2 0 0 0 0 11 2 13 54 DAYS WITH PRECIPITATION >= 1 5 13 15 8 4 1 0 0 0 14 4 17 81 DAYS WITH PRECIPITATION 9 15 20 12 5 1 1 0 0 14 4 19 100 GREATEST DAILY PRECIPITATION 14.0 21.0 21.2 27.0 7.0 3.0 0.0 0.0 0.0 28.0 28.0 49.0 49.0 DAY 6 4 6 13 12 18 ** ** ** 5 3 6 DAY WITH THUNDER STORM 0 0 0 1 2 1 0 0 0 1 0 0 5 DAYS WITH SNOW OR SLEET 5 5 11 2 0 0 0 0 0 1 0 8 32 DAYS WITH DUST 1 0 2 1 2 1 0 0 1 0 0 3 11 WIND DIRECTION (PREVAILING) 225 *** 225 270 270 270 45 270 270 *** *** *** *** PREVAILING WIND SPEED(KNOTS) 14.9 **** 10.8 12.7 12.3 14.6 10.0 14.3 12.7 **** **** **** **** PREVAILING WIND PERCENT 29.8 ***** 29.8 30.8 26.6 15.0 18.5 22.6 19.0 ***** ***** ***** ***** CALMS PERCENT OF WIND 33.9 ***** 33.1 28.3 38.7 52.5 38.7 38.7 47.1 ***** ***** ***** ***** NO. OF WIND OBSERVATION 124 112 124 120 124 120 124 124 121 117 96 107 1413 VECTOR WIND DIRECTION (MEAN) 214 *** 218 233 237 229 280 269 245 *** *** *** *** VECTOR WIND MAGNITUDE(KNOTS) 7.9 **** 5.7 7.1 5.7 3.7 0.9 3.1 2.2 **** **** **** **** WIND STEADINESES (MEAN %) 84.0 ***** 80.3 80.7 80.3 66.1 13.4 42.5 40.7 ***** ***** ***** ***** WIND SPEED (MEAN KNOTS) 9.4 **** 7.1 8.8 7.1 5.6 6.7 7.3 5.4 **** **** **** **** FASTEST WIND DIRECTION 260 *** 260 260 210 250 270 240 270 *** *** *** *** FASTEST WIND SPEED (KNOTS) 29 *** 27 29 23 33 19 21 19 *** *** *** *** DAY 31 ** 12 20 10 2 8 13 6 ** ** ** DAYS WITH SKY CLEAR (0-2)/8 11 4 6 15 11 26 27 25 29 10 19 4 187 DAYS WITH P.CLOUDY (3-6)/8 13 13 13 6 16 3 4 6 1 9 8 7 99 DAYS WITH CLOUDY (7-8)/8 7 11 12 9 4 1 0 0 0 12 3 19 78 DAYS WITH VISIBILITY =< 2 KM 5 6 8 3 1 2 1 0 3 4 0 3 36 DURATION OF SUNSHINE HOURS 169.4 126.2 139.6 234.1 269.5 312.1 343.0 324.8 275.6 127.5 ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 857.8 ****** 850.7 854.7 856.4 854.9 854.1 854.3 857.7 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 866.9 ****** 860.8 862.6 862.2 859.2 859.9 863.0 863.0 ****** ****** ****** ****** DAY-HOUR 17- 6 **-** 23- 6 22- 6 13- 6 28- 6 11- 6 8- 6 26- 6 **-** **-** **-** MIN. QFE PRESSURE IN HPA 846.3 ****** 839.0 846.0 850.0 850.0 849.0 850.0 853.0 ****** ****** ****** ****** DAY-HOUR 6-12 **-** 13-15 3-15 21-15 13-15 3-12 18-15 5-15 **-** **-** **-** MEAN QNH PRESSURE IN HPA 1021.7 ****** 1013.5 1018.1 1020.1 1018.3 1017.4 1017.6 1021.5 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1032.2 ****** 1025.1 1027.2 1026.8 1023.3 1024.1 1027.7 1027.7 ****** ****** ****** ****** DAY-HOUR 17- 6 **-** 23- 6 22- 6 13- 6 28- 6 11- 6 8- 6 26- 6 **-** **-** **-** MIN. QNH PRESSURE IN HPA 1008.4 ****** 1000.0 1008.1 1012.7 1012.7 1011.5 1012.7 1016.2 ****** ****** ****** ****** DAY-HOUR 6-12 **-** 13-15 3-15 21-15 13-15 3-12 18-15 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 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 858.7 856.2 851.2 855.2 857.2 855.8 855.4 855.5 859.1 862.1 862.5 859.2 857.3 MAX. QFE PRESSURE IN HPA 866.9 864.0 860.8 862.6 862.2 859.2 859.9 863.0 863.0 867.2 872.0 870.5 872.0 DAY 17 1 23 22 13 28 11 8 26 17 30 1 MIN. QFE PRESSURE IN HPA 848.7 847.5 840.0 847.0 851.9 852.0 851.0 852.0 855.4 853.0 850.5 850.4 840.0 DAY 6 10 19 4 23 9 3 18 11 4 7 23 MEAN QNH PRESSURE IN HPA 1022.8 1019.9 1014.1 1018.7 1021.0 1019.4 1018.9 1019.0 1023.1 1026.7 1027.1 1023.3 1021.2 MAX. QNH PRESSURE IN HPA 1032.2 1028.8 1025.1 1027.2 1026.8 1023.3 1024.1 1027.7 1027.7 1032.5 1038.0 1036.3 1038.0 DAY 17 1 23 22 13 28 11 8 26 17 30 1 MIN. QNH PRESSURE IN HPA 1011.2 1009.8 1001.2 1009.2 1014.9 1015.0 1013.8 1015.0 1018.9 1016.2 1013.3 1013.2 1001.2 DAY 6 10 19 4 23 9 3 18 11 4 7 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 858.1 855.8 851.1 855.1 856.9 855.3 854.5 854.7 858.1 861.7 861.7 858.6 856.8 MAX. QFE PRESSURE IN HPA 866.0 863.2 860.2 861.4 862.0 858.4 858.1 862.0 862.0 867.0 871.0 869.0 871.0 DAY 17 1 23 22 13 28 11 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 847.1 847.0 840.0 846.5 852.0 852.0 850.0 851.3 854.5 853.0 850.9 850.0 840.0 DAY 6 10 19 4 23 9 3 25 11 4 7 23 MEAN QNH PRESSURE IN HPA 1022.1 1019.4 1013.9 1018.5 1020.7 1018.8 1017.9 1018.1 1022.0 1026.2 1026.2 1022.6 1020.5 MAX. QNH PRESSURE IN HPA 1031.1 1027.9 1024.5 1025.8 1026.5 1022.4 1022.0 1026.5 1026.5 1032.3 1036.9 1034.6 1036.9 DAY 17 1 23 22 13 28 11 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1009.4 1009.2 1001.2 1008.7 1015.0 1015.0 1012.7 1014.2 1017.9 1016.2 1013.7 1012.7 1001.2 DAY 6 10 19 4 23 9 3 25 11 4 7 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 857.0 854.5 850.1 854.4 855.9 854.5 853.4 853.5 856.7 860.9 860.9 857.8 855.8 MAX. QFE PRESSURE IN HPA 864.0 862.0 858.5 860.0 860.0 857.6 857.0 860.2 860.5 865.8 869.8 867.5 869.8 DAY 17 1 23 22 13 28 10 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 846.3 845.0 840.0 846.7 851.5 851.0 849.0 850.0 853.5 852.6 852.4 849.5 840.0 DAY 6 10 19 4 23 13 3 21 5 4 6 23 MEAN QNH PRESSURE IN HPA 1020.8 1017.9 1012.9 1017.7 1019.5 1017.8 1016.6 1016.8 1020.5 1025.2 1025.2 1021.7 1019.4 MAX. QNH PRESSURE IN HPA 1028.8 1026.5 1022.5 1024.2 1024.2 1021.5 1020.8 1024.5 1024.8 1030.9 1035.5 1032.9 1035.5 DAY 17 1 23 22 13 28 10 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1008.4 1006.9 1001.2 1008.9 1014.4 1013.8 1011.5 1012.7 1016.7 1015.7 1015.5 1012.1 1001.2 DAY 6 10 19 4 23 13 3 21 5 4 6 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 857.3 854.7 850.3 854.2 855.7 854.0 853.1 853.3 856.7 861.1 ****** 859.5 ****** MAX. QFE PRESSURE IN HPA 864.3 862.7 858.0 859.1 859.8 857.0 857.0 859.1 860.3 866.0 ****** 867.8 ****** DAY 17 1 22 21 12 28 10 7 25 16 ** 1 MIN. QFE PRESSURE IN HPA 846.3 847.0 839.0 846.0 850.0 850.0 849.1 850.0 853.0 853.6 ****** 851.8 ****** DAY 6 8 13 3 21 13 2 18 5 4 ** 6 MEAN QNH PRESSURE IN HPA 1021.2 1018.1 1013.0 1017.5 1019.3 1017.3 1016.3 1016.5 1020.4 1025.4 ****** 1023.6 ****** MAX. QNH PRESSURE IN HPA 1029.2 1027.3 1021.9 1023.2 1024.0 1020.8 1020.8 1023.2 1024.6 1031.1 ****** 1033.2 ****** DAY 17 1 22 21 12 28 10 7 25 16 ** 1 MIN. QNH PRESSURE IN HPA 1008.4 1009.2 1000.0 1008.1 1012.7 1012.7 1011.7 1012.7 1016.2 1016.8 ****** 1014.8 ****** DAY 6 8 13 3 21 13 2 18 5 4 ** 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** 5.5 11.9 17.9 22.0 25.2 24.4 21.8 15.6 7.0 1.8 ***** MINIMUN AIR TEMPERATURE (C) -6.1 -6.2 -0.1 5.1 9.1 11.7 15.8 15.7 10.5 8.0 0.1 -4.5 4.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 20 20 3 0 0 0 0 0 0 0 8 15 66 DAYS WITH FREEZING MIN.<= 0 31 26 19 3 0 0 0 0 0 0 17 21 117 TEMPERATURE RECORDS LOWEST(C) -22.0 -18.7 -10.0 -1.3 3.2 7.6 11.4 9.4 7.4 1.0 -12.0 -22.0 -22.0 DAY 20 27 6 1 7 26 2 31 7 23 15 29 MAXIMUM AIR TEMPERATURE (C) 0.8 2.0 7.9 15.0 21.9 26.8 30.0 28.9 27.5 20.2 11.6 5.8 16.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 14 10 7 0 0 0 36 DAYS WITH MAXIMUM TEMP. <= 0 10 8 0 0 0 0 0 0 0 0 0 8 26 TEMPERATURE RECORDS HIGHEST(C) 5.0 8.8 14.5 20.2 27.2 32.0 36.8 34.4 31.8 24.8 18.8 15.0 36.8 DAY 25 29 19 20 18 12 31 12 15 28 3 5 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 8.2 8.0 9.9 12.8 15.1 14.2 13.2 17.0 12.2 11.5 10.3 11.6 MEAN DAILY TEMP. (MDT) (C) -2.7 -2.1 3.9 10.1 15.5 19.2 22.9 22.3 19.0 14.1 5.9 0.7 10.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 4.7 63.2 50.3 1.0 0.0 0.0 0.0 119.2 HEATING DEG. DAYS(BASE 18 0C) 640.6 582.5 436.0 238.4 82.3 7.0 0.0 0.1 5.7 121.6 364.2 517.6 2996.1 DEWPOINT (MEAN C) ***** ***** -0.2 5.0 8.2 11.0 14.9 13.6 5.6 4.3 -1.9 -3.6 ***** MIXING RATIO (G/KG) ****** ****** 4.58 6.66 8.20 9.84 12.80 11.84 6.88 6.17 4.13 3.66 ****** VAPOUR PRESSURE (HPA) ****** ****** 6.23 9.06 11.15 13.31 17.21 15.96 9.38 8.44 5.65 5.02 ****** SATURATION DEF. (HPA) ****** ****** 3.06 5.19 10.16 14.14 16.20 15.62 18.12 10.07 5.05 2.71 ****** RELATIVE HUMIDITY (MEAN %) *** *** 70 65 56 53 56 55 39 51 57 70 *** RELATIVE HUMIDITY (MAX. %) 92 90 85 85 85 85 84 81 65 71 76 85 82 RELATIVE HUMIDITY (MIN. %) 81 75 58 49 38 36 41 40 25 37 41 55 48 RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** 90 83 85 84 80 64 71 72 80 *** RELATIVE HUMIDITY (MEAN% 09UTC) 87 82 68 60 46 45 50 50 33 43 50 66 57 RELATIVE HUMIDITY (MEAN% 15UTC) *** 84 68 60 45 40 44 43 29 48 55 67 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 112.5 108.1 106.6 106.6 16.0 6.0 0.8 20.0 0.0 35.3 77.9 80.8 670.6 DAYS WITH PRECIPITATION >=10 6 4 5 6 1 0 0 0 0 0 3 3 28 DAYS WITH PRECIPITATION >= 5 9 5 8 7 1 0 0 2 0 3 8 6 49 DAYS WITH PRECIPITATION >= 1 15 12 13 14 2 2 0 3 0 7 10 9 87 DAYS WITH PRECIPITATION 15 15 14 17 2 4 1 4 0 12 14 11 109 GREATEST DAILY PRECIPITATION 22.0 25.0 21.0 20.0 15.0 4.0 0.8 9.0 0.0 9.0 18.0 27.0 27.0 DAY 28 17 4 22 1 30 1 4 ** 16 10 26 DAY WITH THUNDER STORM 0 1 0 7 0 3 1 1 0 5 0 0 18 DAYS WITH SNOW OR SLEET 12 10 5 0 0 0 0 0 0 0 2 6 35 DAYS WITH DUST 0 0 1 0 2 5 0 2 5 0 0 5 20 WIND DIRECTION (PREVAILING) *** *** 225 180 225 270 45 45 270 225 225 225 *** PREVAILING WIND SPEED(KNOTS) **** **** 12.2 9.9 10.7 13.0 6.8 7.9 9.3 11.5 10.5 10.6 **** PREVAILING WIND PERCENT ***** ***** 23.4 19.9 26.5 20.7 28.6 23.4 21.1 17.2 29.9 23.4 ***** CALMS PERCENT OF WIND ***** ***** 37.1 45.6 41.9 49.3 37.7 44.2 57.1 51.7 32.7 40.9 ***** NO. OF WIND OBSERVATION 100 114 124 136 155 150 154 154 147 151 147 154 1686 VECTOR WIND DIRECTION (MEAN) *** *** 225 225 239 239 41 24 265 224 222 211 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** 5.8 3.7 4.7 3.7 2.0 1.7 2.4 3.3 6.2 4.5 **** WIND STEADINESES (MEAN %) ***** ***** 74.4 64.9 75.8 64.9 51.3 37.0 66.7 70.2 84.9 76.3 ***** WIND SPEED (MEAN KNOTS) **** **** 7.8 5.7 6.2 5.7 3.9 4.6 3.6 4.7 7.3 5.9 **** FASTEST WIND DIRECTION *** *** 270 190 260 250 40 270 240 240 240 230 *** FASTEST WIND SPEED (KNOTS) *** *** 23 19 25 21 12 19 21 23 21 29 *** DAY ** ** 12 17 28 15 5 29 5 27 4 2 DAYS WITH SKY CLEAR (0-2)/8 4 5 10 3 16 13 24 24 29 12 15 9 164 DAYS WITH P.CLOUDY (3-6)/8 12 5 11 14 14 17 7 5 1 16 12 16 130 DAYS WITH CLOUDY (7-8)/8 12 19 10 13 1 0 0 2 0 3 3 5 68 DAYS WITH VISIBILITY =< 2 KM 12 5 0 0 0 0 0 0 0 0 1 5 23 DURATION OF SUNSHINE HOURS ****** 60.7 150.2 122.9 251.8 303.6 312.4 304.4 311.1 162.6 173.6 138.2 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 ****** ****** 853.5 856.9 857.3 855.0 854.2 855.2 858.1 860.1 859.0 857.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** 862.5 867.1 863.2 860.5 859.6 861.8 863.6 865.9 867.2 865.0 ****** DAY-HOUR **-** **-** 17- 6 8- 9 16- 6 12- 6 27- 6 21- 6 21- 6 28- 6 6- 6 21-15 MIN. QFE PRESSURE IN HPA ****** ****** 840.5 850.6 849.0 848.4 849.5 849.4 853.8 853.0 850.0 838.0 ****** DAY-HOUR **-** **-** 4-12 30-15 1- 3 30-15 25-15 29-15 3-12 30-12 19-15 27- 3 MEAN QNH PRESSURE IN HPA ****** ****** 1016.7 1020.7 1021.1 1018.4 1017.6 1018.7 1022.1 1024.4 1023.1 1020.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1027.1 1032.4 1027.9 1024.8 1023.8 1026.3 1028.4 1031.0 1032.5 1030.0 ****** DAY-HOUR **-** **-** 17- 6 8- 9 16- 6 12- 6 27- 6 21- 6 21- 6 28- 6 6- 6 21-15 MIN. QNH PRESSURE IN HPA ****** ****** 1001.7 1013.4 1011.5 1010.9 1012.1 1012.0 1017.1 1016.2 1012.7 998.9 ****** DAY-HOUR **-** **-** 4-12 30-15 1- 3 30-15 25-15 29-15 3-12 30-12 19-15 27- 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 ****** ****** ****** 854.7 857.3 855.5 854.9 855.9 858.4 860.2 859.0 856.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 857.2 862.8 859.6 859.0 861.2 863.0 864.2 865.7 863.5 ****** DAY ** ** ** 18 17 12 27 21 15 17 6 3 MIN. QFE PRESSURE IN HPA ****** ****** ****** 852.0 849.0 850.8 851.5 851.0 854.5 855.0 852.0 838.0 ****** DAY ** ** ** 30 1 24 15 29 12 30 28 27 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1018.1 1021.1 1019.0 1018.4 1019.5 1022.4 1024.4 1023.1 1020.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1021.0 1027.4 1023.8 1023.1 1025.6 1027.7 1029.1 1030.8 1028.3 ****** DAY ** ** ** 18 17 12 27 21 15 17 6 3 MIN. QNH PRESSURE IN HPA ****** ****** ****** 1015.0 1011.5 1013.6 1014.4 1013.8 1017.9 1018.5 1015.0 998.9 ****** DAY ** ** ** 30 1 24 15 29 12 30 28 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1014.3 1014.7 1010.1 1007.3 1008.8 1014.5 1019.7 1023.8 1024.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1017.6 1022.5 1014.3 1014.1 1014.7 1020.0 1027.2 1034.5 1042.8 ****** DAY ** ** ** 17 5 12 27 21 15 23 15 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** 1011.8 1006.0 1005.6 1001.3 1002.0 1008.7 1012.3 1013.1 1001.6 ****** DAY ** ** ** 20 1 16 15 29 9 30 19 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 858.4 857.2 854.0 858.0 857.9 855.8 855.3 856.3 859.2 861.1 859.8 857.7 857.6 MAX. QFE PRESSURE IN HPA 868.0 867.0 862.5 866.2 863.2 860.5 859.6 861.8 863.6 865.9 867.2 864.5 868.0 DAY 10 6 17 8 16 12 27 21 21 28 6 3 MIN. QFE PRESSURE IN HPA 850.6 845.0 843.2 852.8 849.5 850.9 851.5 851.3 855.0 854.7 852.5 838.8 838.8 DAY 26 2 4 30 1 24 15 29 5 30 28 27 MEAN QNH PRESSURE IN HPA 1022.4 1021.0 1017.2 1022.0 1021.8 1019.4 1018.8 1019.9 1023.3 1025.4 1024.0 1021.6 1021.4 MAX. QNH PRESSURE IN HPA 1033.4 1032.3 1027.1 1031.4 1027.9 1024.8 1023.8 1026.3 1028.4 1031.0 1032.5 1029.4 1033.4 DAY 10 6 17 8 16 12 27 21 21 28 6 3 MIN. QNH PRESSURE IN HPA 1013.4 1006.9 1004.9 1015.9 1012.1 1013.7 1014.4 1014.2 1018.5 1018.1 1015.6 999.8 999.8 DAY 26 2 4 30 1 24 15 29 5 30 28 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 858.4 857.2 853.8 857.8 857.5 855.2 854.6 855.5 858.3 860.4 859.4 857.4 857.1 MAX. QFE PRESSURE IN HPA 868.0 867.0 862.0 867.1 863.0 860.2 858.7 860.6 862.6 865.7 866.4 864.8 868.0 DAY 9 6 16 8 16 12 27 21 15 28 6 21 MIN. QFE PRESSURE IN HPA 850.8 844.0 841.5 852.1 849.8 850.9 850.7 850.6 854.9 853.4 852.8 840.0 840.0 DAY 26 1 4 20 1 24 15 29 3 30 28 27 MEAN QNH PRESSURE IN HPA 1022.4 1021.0 1017.0 1021.7 1021.4 1018.7 1018.0 1019.0 1022.3 1024.7 1023.5 1021.2 1020.9 MAX. QNH PRESSURE IN HPA 1033.4 1032.3 1026.5 1032.4 1027.7 1024.5 1022.7 1024.9 1027.2 1030.8 1031.6 1029.8 1033.4 DAY 9 6 16 8 16 12 27 21 15 28 6 21 MIN. QNH PRESSURE IN HPA 1013.6 1005.8 1002.9 1015.1 1012.5 1013.7 1013.5 1013.4 1018.3 1016.6 1015.9 1001.2 1001.2 DAY 26 1 4 20 1 24 15 29 3 30 28 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 857.6 856.1 853.0 856.6 856.9 854.4 853.4 854.2 857.2 859.5 858.3 856.5 856.1 MAX. QFE PRESSURE IN HPA 867.0 866.4 861.5 866.2 862.0 859.8 857.0 859.0 860.9 865.0 864.8 864.2 867.0 DAY 9 6 16 8 16 12 27 21 14 16 6 21 MIN. QFE PRESSURE IN HPA 850.0 841.4 840.5 851.2 850.2 849.5 849.7 850.0 853.8 853.0 852.0 840.5 840.5 DAY 28 1 4 20 1 30 15 29 3 30 19 26 MEAN QNH PRESSURE IN HPA 1021.5 1019.7 1016.1 1020.3 1020.7 1017.8 1016.6 1017.6 1021.0 1023.6 1022.3 1020.2 1019.8 MAX. QNH PRESSURE IN HPA 1032.3 1031.6 1026.0 1031.4 1026.5 1024.0 1020.8 1023.1 1025.3 1030.0 1029.8 1029.1 1032.3 DAY 9 6 16 8 16 12 27 21 14 16 6 21 MIN. QNH PRESSURE IN HPA 1012.7 1002.8 1001.7 1014.1 1012.9 1012.1 1012.3 1012.7 1017.1 1016.2 1015.0 1001.7 1001.7 DAY 28 1 4 20 1 30 15 29 3 30 19 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 ****** 856.1 853.2 856.5 856.8 854.1 853.0 854.2 857.6 859.7 858.6 857.0 ****** MAX. QFE PRESSURE IN HPA ****** 866.4 862.0 865.8 862.0 859.0 857.0 858.9 861.8 865.0 865.0 865.0 ****** DAY ** 6 16 8 16 12 30 21 14 16 6 21 MIN. QFE PRESSURE IN HPA ****** 841.2 840.8 850.6 851.0 848.4 849.5 849.4 854.0 853.4 850.0 840.5 ****** DAY ** 1 4 30 1 30 25 29 3 30 19 26 MEAN QNH PRESSURE IN HPA ****** 1019.8 1016.3 1020.2 1020.5 1017.5 1016.2 1017.5 1021.4 1023.9 1022.7 1020.7 ****** MAX. QNH PRESSURE IN HPA ****** 1031.6 1026.5 1030.9 1026.5 1023.1 1020.8 1023.0 1026.3 1030.0 1030.0 1030.0 ****** DAY ** 6 16 8 16 12 30 21 14 16 6 21 MIN. QNH PRESSURE IN HPA ****** 1002.6 1002.1 1013.4 1013.8 1010.9 1012.1 1012.0 1017.3 1016.6 1012.7 1001.7 ****** DAY ** 1 4 30 1 30 25 29 3 30 19 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1012.8 1014.0 1008.6 1004.9 1006.8 1013.2 1019.2 1023.4 1024.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1016.7 1021.6 1013.9 1011.0 1014.0 1018.9 1027.3 1033.1 1041.9 ****** DAY ** ** ** 18 4 26 27 5 14 16 15 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** 1008.2 1008.1 1003.1 1000.2 1000.7 1008.9 1012.5 1010.4 1003.5 ****** DAY ** ** ** 17 27 30 15 29 17 30 19 26 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -8.1 -6.7 5.9 15.3 18.7 24.1 28.8 26.5 21.5 16.5 8.8 3.2 12.9 MINIMUN AIR TEMPERATURE (C) -14.0 -13.5 1.4 6.8 9.1 10.9 16.9 14.1 10.6 9.7 4.3 -1.4 4.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 0 0 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 28 26 1 0 0 0 0 0 0 0 1 7 63 DAYS WITH FREEZING MIN.<= 0 30 27 8 0 0 0 0 0 0 0 2 22 89 TEMPERATURE RECORDS LOWEST(C) -28.6 -25.0 -5.2 2.0 4.0 4.0 10.4 8.8 5.0 3.0 -5.0 -9.0 -28.6 DAY 5 15 30 3 12 21 1 16 21 25 22 6 MAXIMUM AIR TEMPERATURE (C) -3.2 -1.4 9.1 20.6 23.5 29.4 34.8 32.5 26.9 20.8 12.2 7.5 17.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 15 31 29 9 0 0 0 84 DAYS WITH MAXIMUM TEMP. <= 0 25 19 0 0 0 0 0 0 0 0 0 2 46 TEMPERATURE RECORDS HIGHEST(C) 4.0 10.0 17.0 25.0 29.0 34.4 39.0 36.0 34.0 27.6 17.0 13.0 39.0 DAY 20 27 24 29 24 29 21 7 3 6 4 27 DIF. BETWEEN (MAX.-MIN.) (C) 10.8 12.1 7.7 13.8 14.4 18.5 17.9 18.4 16.3 11.1 7.9 8.9 13.1 MEAN DAILY TEMP. (MDT) (C) -8.6 -7.5 5.3 13.7 16.3 20.2 25.8 23.3 18.8 15.2 8.3 3.1 11.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 14.4 150.2 73.0 15.4 1.4 0.0 0.0 254.5 HEATING DEG. DAYS(BASE 18 0C) 796.5 713.7 394.3 128.8 61.6 4.3 0.0 0.0 30.8 101.6 292.4 448.1 2972.2 DEWPOINT (MEAN C) -12.3 -12.7 -1.4 1.4 3.8 4.5 11.4 11.4 9.4 1.6 2.8 -3.4 1.4 MIXING RATIO (G/KG) 1.86 1.82 4.13 5.04 6.00 6.40 10.62 10.45 9.01 5.25 5.63 3.56 5.81 VAPOUR PRESSURE (HPA) 2.56 2.50 5.64 6.91 8.20 8.72 14.31 14.11 12.23 7.19 7.71 4.88 7.91 SATURATION DEF. (HPA) 1.06 1.60 3.96 11.32 14.47 23.01 27.17 22.56 15.34 12.64 3.94 3.06 11.68 RELATIVE HUMIDITY (MEAN %) 73 65 63 42 41 33 37 43 50 43 69 65 52 RELATIVE HUMIDITY (MAX. %) 81 77 80 62 66 62 56 65 71 62 88 83 71 RELATIVE HUMIDITY (MIN. %) 64 53 50 28 27 19 25 30 37 31 52 49 39 RELATIVE HUMIDITY (MEAN% 03UTC) 75 76 78 61 66 62 55 65 71 60 83 78 69 RELATIVE HUMIDITY (MEAN% 09UTC) 71 62 58 35 34 25 34 38 43 35 63 59 46 RELATIVE HUMIDITY (MEAN% 15UTC) 73 62 55 32 29 20 28 31 39 41 67 60 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 59.7 28.0 109.5 1.8 9.0 0.0 0.0 0.6 0.1 41.8 108.7 38.5 397.7 DAYS WITH PRECIPITATION >=10 1 1 4 0 0 0 0 0 0 2 2 3 13 DAYS WITH PRECIPITATION >= 5 3 2 6 0 0 0 0 0 0 4 4 3 22 DAYS WITH PRECIPITATION >= 1 5 5 11 1 2 0 0 0 0 5 5 5 39 DAYS WITH PRECIPITATION 11 6 12 2 4 0 0 2 1 6 13 8 65 GREATEST DAILY PRECIPITATION 37.0 16.0 27.0 1.0 4.6 0.0 0.0 0.3 0.1 19.0 52.0 12.0 52.0 DAY 11 19 10 1 10 ** ** 18 19 29 12 12 DAY WITH THUNDER STORM 0 0 0 1 1 0 0 0 0 2 0 0 4 DAYS WITH SNOW OR SLEET 7 5 3 0 0 0 0 0 0 0 0 2 17 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 45 45 225 225 225 270 45 270 270 270 225 225 270 PREVAILING WIND SPEED(KNOTS) 9.1 16.3 15.2 18.7 14.2 11.8 5.5 12.4 11.9 12.6 10.2 13.5 13.1 PREVAILING WIND PERCENT 8.4 2.9 10.5 12.0 20.0 23.3 16.8 16.9 28.0 22.4 20.8 19.2 12.8 CALMS PERCENT OF WIND 72.9 90.7 63.4 63.3 47.7 48.7 45.8 51.3 40.0 34.9 43.0 53.0 54.4 NO. OF WIND OBSERVATION 155 140 153 150 155 150 155 154 150 152 149 151 1814 VECTOR WIND DIRECTION (MEAN) 141 65 232 247 235 240 0 257 254 241 218 215 235 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.3 2.2 3.8 4.8 3.6 0.0 2.0 3.5 4.4 4.7 4.6 2.7 WIND STEADINESES (MEAN %) 14.3 30.0 48.9 66.7 70.6 70.6 0.0 42.6 56.5 64.7 79.7 82.1 55.1 WIND SPEED (MEAN KNOTS) 2.8 1.0 4.5 5.7 6.8 5.1 3.9 4.7 6.2 6.8 5.9 5.6 4.9 FASTEST WIND DIRECTION 240 360 240 270 170 280 40 210 270 270 250 240 270 FASTEST WIND SPEED (KNOTS) 49 23 27 58 39 35 29 19 21 25 21 29 58 DAY 1 2 15 15 5 23 25 1 12 7 18 8 DAYS WITH SKY CLEAR (0-2)/8 14 17 8 17 19 30 31 28 27 16 10 19 236 DAYS WITH P.CLOUDY (3-6)/8 9 7 12 11 10 0 0 3 2 10 11 9 84 DAYS WITH CLOUDY (7-8)/8 8 4 11 2 2 0 0 0 1 5 9 3 45 DAYS WITH VISIBILITY =< 2 KM 9 5 3 0 0 0 0 0 0 1 1 0 19 DURATION OF SUNSHINE HOURS 91.0 155.5 128.6 253.5 299.9 360.0 367.3 346.6 303.0 209.8 137.8 172.1 2825.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 858.1 860.1 855.3 859.6 859.0 856.3 855.4 855.9 857.9 860.5 859.6 857.9 858.0 MAX. QFE PRESSURE IN HPA 863.8 867.0 860.5 864.8 863.5 860.3 860.1 861.9 865.6 866.8 864.8 864.6 867.0 DAY-HOUR 30- 9 4- 6 6- 9 9- 9 14- 6 13- 6 9- 6 19- 6 23- 6 27- 6 3- 9 18- 9 MIN. QFE PRESSURE IN HPA 850.0 851.0 841.5 854.0 852.8 850.6 849.6 849.0 851.8 854.8 853.2 853.0 841.5 DAY-HOUR 2-15 1- 3 29- 6 13-12 6-15 9-12 5-15 1- 9 13-12 2-12 19-12 4-12 MEAN QNH PRESSURE IN HPA 1022.0 1024.3 1018.8 1023.7 1023.1 1019.9 1018.9 1019.5 1021.8 1024.7 1023.8 1021.7 1021.8 MAX. QNH PRESSURE IN HPA 1028.6 1032.3 1024.8 1029.8 1028.3 1024.6 1024.3 1026.4 1030.7 1032.1 1029.8 1029.5 1032.3 DAY-HOUR 30- 9 4- 6 6- 9 9- 9 14- 6 13- 6 9- 6 19- 6 23- 6 27- 6 3- 9 18- 9 MIN. QNH PRESSURE IN HPA 1012.7 1013.8 1002.9 1017.3 1015.9 1013.4 1012.2 1011.5 1014.8 1018.2 1016.4 1016.2 1002.9 DAY-HOUR 2-15 1- 3 29- 6 13-12 6-15 9-12 5-15 1- 9 13-12 2-12 19-12 4-12 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 857.7 859.6 855.1 859.8 859.4 856.7 856.1 856.4 858.3 860.6 859.6 857.7 858.1 MAX. QFE PRESSURE IN HPA 863.0 866.0 859.9 864.0 863.0 860.0 859.6 861.0 865.0 866.0 863.8 863.0 866.0 DAY 22 4 6 9 14 13 9 19 23 27 3 18 MIN. QFE PRESSURE IN HPA 851.0 851.0 842.0 855.0 852.8 852.0 851.6 850.0 853.2 856.0 854.0 853.0 842.0 DAY 17 1 29 13 7 9 6 1 13 2 15 13 MEAN QNH PRESSURE IN HPA 1021.6 1023.7 1018.6 1023.9 1023.5 1020.4 1019.8 1020.1 1022.2 1024.9 1023.7 1021.5 1022.0 MAX. QNH PRESSURE IN HPA 1027.7 1031.1 1024.1 1028.8 1027.7 1024.2 1023.8 1025.4 1030.0 1031.1 1028.6 1027.7 1031.1 DAY 22 4 6 9 14 13 9 19 23 27 3 18 MIN. QNH PRESSURE IN HPA 1013.8 1013.8 1003.5 1018.5 1015.9 1015.0 1014.5 1012.7 1016.4 1019.6 1017.3 1016.2 1003.5 DAY 17 1 29 13 7 9 6 1 13 2 15 13 MEAN QFF PRESSURE IN HPA 1032.0 1033.6 1019.0 1019.8 1017.1 1011.3 1007.4 1009.4 1014.6 1019.3 1022.5 1024.0 1019.2 MAX. QFF PRESSURE IN HPA 1039.5 1044.3 1026.4 1024.7 1023.4 1016.4 1013.4 1015.6 1026.2 1028.2 1032.2 1032.4 1044.3 DAY 9 8 6 10 14 13 9 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1019.8 1020.6 1004.6 1012.3 1010.1 1006.1 1002.5 1000.0 1007.2 1010.9 1016.0 1017.3 1000.0 DAY 2 23 29 15 31 10 6 1 13 7 15 12 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 858.6 860.6 855.9 860.4 859.8 857.1 856.6 856.9 858.8 861.2 860.4 858.4 858.7 MAX. QFE PRESSURE IN HPA 863.5 867.0 860.5 864.2 863.5 860.3 860.1 861.9 865.6 866.8 864.5 864.0 867.0 DAY 22 4 7 9 14 13 9 19 23 27 3 18 MIN. QFE PRESSURE IN HPA 852.0 851.8 841.5 855.0 853.0 852.0 852.0 850.0 853.9 856.6 855.5 854.5 841.5 DAY 17 1 29 13 7 9 6 1 13 2 15 12 MEAN QNH PRESSURE IN HPA 1022.6 1024.9 1019.5 1024.7 1024.0 1020.9 1020.3 1020.6 1022.8 1025.7 1024.7 1022.4 1022.7 MAX. QNH PRESSURE IN HPA 1028.3 1032.3 1024.8 1029.1 1028.3 1024.6 1024.3 1026.4 1030.7 1032.1 1029.4 1028.8 1032.3 DAY 22 4 7 9 14 13 9 19 23 27 3 18 MIN. QNH PRESSURE IN HPA 1015.0 1014.8 1002.9 1018.5 1016.2 1015.0 1015.0 1012.7 1017.2 1020.3 1019.0 1017.9 1002.9 DAY 17 1 29 13 7 9 6 1 13 2 15 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 858.6 860.7 856.1 859.9 859.3 856.5 855.9 856.1 858.0 860.6 859.9 858.1 858.3 MAX. QFE PRESSURE IN HPA 863.8 867.0 860.5 864.8 862.9 859.7 859.6 861.0 865.0 865.2 864.8 864.6 867.0 DAY 30 4 6 9 20 4 9 19 22 24 3 18 MIN. QFE PRESSURE IN HPA 852.3 852.0 843.5 855.0 853.0 851.0 851.0 849.0 852.8 855.5 855.0 853.5 843.5 DAY 2 1 29 13 7 9 5 1 13 30 18 12 MEAN QNH PRESSURE IN HPA 1022.7 1025.0 1019.7 1024.1 1023.4 1020.2 1019.5 1019.7 1022.0 1025.0 1024.1 1022.0 1022.3 MAX. QNH PRESSURE IN HPA 1028.6 1032.3 1024.8 1029.8 1027.6 1023.9 1023.8 1025.4 1030.0 1030.2 1029.8 1029.5 1032.3 DAY 30 4 6 9 20 4 9 19 22 24 3 18 MIN. QNH PRESSURE IN HPA 1015.3 1015.0 1005.2 1018.5 1016.2 1013.8 1013.8 1011.5 1015.9 1019.0 1018.5 1016.7 1005.2 DAY 2 1 29 13 7 9 5 1 13 30 18 12 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 857.7 859.7 854.7 858.9 858.3 855.7 854.5 855.0 857.0 859.8 859.0 857.6 857.3 MAX. QFE PRESSURE IN HPA 862.5 866.0 859.5 863.4 861.5 859.0 858.4 859.4 864.0 864.0 863.3 863.6 866.0 DAY 30 8 6 9 13 3 9 19 22 27 3 18 MIN. QFE PRESSURE IN HPA 850.7 851.0 843.5 854.0 853.0 850.6 849.8 849.0 851.8 854.8 853.2 853.0 843.5 DAY 2 1 29 13 6 9 5 1 13 2 19 4 MEAN QNH PRESSURE IN HPA 1021.5 1023.8 1018.2 1022.9 1022.3 1019.3 1017.9 1018.5 1020.8 1024.0 1023.1 1021.4 1021.1 MAX. QNH PRESSURE IN HPA 1027.1 1031.1 1023.6 1028.1 1026.0 1023.1 1022.4 1023.5 1028.8 1028.8 1028.0 1028.4 1031.1 DAY 30 8 6 9 13 3 9 19 22 27 3 18 MIN. QNH PRESSURE IN HPA 1013.5 1013.8 1005.2 1017.3 1016.2 1013.4 1012.5 1011.5 1014.8 1018.2 1016.4 1016.2 1005.2 DAY 2 1 29 13 6 9 5 1 13 2 19 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 857.8 859.8 854.8 859.1 858.2 855.4 854.1 855.0 857.4 860.1 859.1 857.5 857.4 MAX. QFE PRESSURE IN HPA 863.0 866.0 859.5 863.0 862.6 858.8 858.5 858.8 864.1 864.0 863.3 864.0 866.0 DAY 30 3 6 9 14 3 9 19 22 22 3 18 MIN. QFE PRESSURE IN HPA 850.0 852.0 845.0 855.0 852.8 850.6 849.6 849.0 853.0 854.8 854.0 853.0 845.0 DAY 2 1 29 12 6 9 5 1 12 2 19 4 MEAN QNH PRESSURE IN HPA 1021.7 1024.0 1018.2 1023.2 1022.2 1018.9 1017.4 1018.5 1021.2 1024.3 1023.2 1021.4 1021.2 MAX. QNH PRESSURE IN HPA 1027.7 1031.1 1023.6 1027.7 1027.2 1022.8 1022.5 1022.8 1028.9 1028.8 1028.0 1028.8 1031.1 DAY 30 3 6 9 14 3 9 19 22 22 3 18 MIN. QNH PRESSURE IN HPA 1012.7 1015.0 1006.9 1018.5 1015.9 1013.4 1012.2 1011.5 1016.2 1018.2 1017.3 1016.2 1006.9 DAY 2 1 29 12 6 9 5 1 12 2 19 4 MEAN QFF PRESSURE IN HPA 1032.2 1033.6 1018.6 1018.8 1015.8 1009.8 1004.8 1007.6 1013.5 1018.9 1022.0 1023.9 1018.3 MAX. QFF PRESSURE IN HPA 1040.1 1044.7 1025.0 1023.2 1023.5 1014.4 1011.8 1013.7 1023.9 1026.9 1030.1 1032.7 1044.7 DAY 9 8 11 1 14 3 9 18 22 22 22 18 MIN. QFF PRESSURE IN HPA 1017.0 1022.9 1008.0 1013.1 1010.3 1005.3 998.9 999.2 1007.0 1009.9 1015.6 1017.0 998.9 DAY 2 23 28 12 30 30 5 1 12 2 27 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.7 -1.0 5.4 10.4 17.7 23.5 27.1 25.7 22.8 15.2 11.4 4.0 13.2 MINIMUN AIR TEMPERATURE (C) -8.5 -4.7 0.1 3.9 8.0 12.4 16.9 14.3 10.2 6.7 2.6 -2.5 5.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 1 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 24 18 5 0 0 0 0 0 0 0 1 9 57 DAYS WITH FREEZING MIN.<= 0 31 26 16 7 0 0 0 0 0 0 12 21 113 TEMPERATURE RECORDS LOWEST(C) -20.0 -15.0 -9.0 -2.0 1.0 8.2 12.6 10.2 6.8 3.0 -4.2 -20.0 -20.0 DAY 26 1 17 4 8 28 8 25 18 17 14 29 MAXIMUM AIR TEMPERATURE (C) 0.1 2.2 10.1 14.8 22.3 28.7 32.5 31.9 29.3 20.0 16.0 6.7 17.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 23 25 11 0 0 0 71 DAYS WITH MAXIMUM TEMP. <= 0 14 9 1 0 0 0 0 0 0 0 0 8 32 TEMPERATURE RECORDS HIGHEST(C) 4.0 8.0 15.4 25.0 28.8 32.0 37.0 35.4 31.0 26.2 22.0 16.0 37.0 DAY 2 28 31 26 31 12 16 5 9 7 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 6.9 10.0 10.9 14.3 16.3 15.6 17.6 19.1 13.3 13.4 9.2 12.9 MEAN DAILY TEMP. (MDT) (C) -4.2 -1.2 5.1 9.4 15.1 20.6 24.7 23.1 19.8 13.4 9.3 2.1 11.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.7 17.2 115.5 64.6 2.4 0.0 0.0 0.0 200.4 HEATING DEG. DAYS(BASE 18 0C) 687.2 538.9 399.8 260.5 98.6 0.0 0.0 0.0 0.0 138.2 260.7 492.6 2876.5 DEWPOINT (MEAN C) -8.2 -5.7 -2.5 0.9 3.7 5.8 8.7 6.0 1.5 3.2 -0.2 -2.6 0.9 MIXING RATIO (G/KG) 2.54 3.04 3.85 4.88 6.10 6.99 8.50 7.22 5.13 5.73 4.53 3.97 5.21 VAPOUR PRESSURE (HPA) 3.48 4.15 5.28 6.64 8.31 9.49 11.52 9.82 7.01 7.86 6.20 5.44 7.10 SATURATION DEF. (HPA) 1.36 1.65 4.15 6.96 13.03 20.78 26.11 25.11 22.83 10.36 7.93 3.54 11.98 RELATIVE HUMIDITY (MEAN %) 73 73 60 56 43 35 34 32 26 49 49 67 50 RELATIVE HUMIDITY (MAX. %) 83 83 79 78 68 58 53 51 39 72 72 83 68 RELATIVE HUMIDITY (MIN. %) 62 63 45 40 29 23 24 20 18 34 31 54 37 RELATIVE HUMIDITY (MEAN% 03UTC) 78 80 76 78 68 58 53 51 39 70 65 *** *** RELATIVE HUMIDITY (MEAN% 09UTC) 70 69 53 48 37 29 29 29 22 42 43 64 45 RELATIVE HUMIDITY (MEAN% 15UTC) 72 70 53 46 31 24 26 21 19 44 45 67 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 69.1 95.4 79.6 180.6 1.1 0.0 0.0 0.0 0.0 31.0 26.9 68.2 551.9 DAYS WITH PRECIPITATION >=10 3 3 4 6 0 0 0 0 0 1 2 3 22 DAYS WITH PRECIPITATION >= 5 5 7 5 6 0 0 0 0 0 4 2 4 33 DAYS WITH PRECIPITATION >= 1 9 10 12 8 1 0 0 0 0 6 3 7 56 DAYS WITH PRECIPITATION 10 16 13 10 1 0 0 0 0 9 5 10 74 GREATEST DAILY PRECIPITATION 17.0 26.0 20.0 41.0 1.1 0.0 0.0 0.0 0.0 10.0 14.0 30.0 41.0 DAY 1 15 14 13 11 ** ** ** ** 25 11 24 DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 0 1 2 0 4 DAYS WITH SNOW OR SLEET 7 11 4 1 0 0 0 0 0 0 0 3 26 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 225 270 270 225 360 360 *** 225 225 225 *** PREVAILING WIND SPEED(KNOTS) 10.9 12.6 9.4 12.1 10.6 10.1 8.8 7.8 **** 9.2 10.6 12.8 **** PREVAILING WIND PERCENT 9.2 17.2 18.8 29.1 20.6 13.3 11.6 8.9 ***** 13.5 17.9 15.3 ***** CALMS PERCENT OF WIND 75.0 58.2 43.0 33.1 42.6 39.3 59.2 64.5 ***** 62.6 62.7 54.8 ***** NO. OF WIND OBSERVATION 152 134 149 148 155 150 147 124 82 155 134 124 1654 VECTOR WIND DIRECTION (MEAN) 224 201 263 245 277 252 337 260 *** 216 202 195 *** VECTOR WIND MAGNITUDE(KNOTS) 2.1 2.3 1.3 5.8 3.2 2.7 1.0 1.0 **** 1.8 2.9 3.0 **** WIND STEADINESES (MEAN %) 75.0 56.1 21.3 78.4 57.1 50.0 28.6 33.3 ***** 62.1 80.6 62.5 ***** WIND SPEED (MEAN KNOTS) 2.8 4.1 6.1 7.4 5.6 5.4 3.5 3.0 **** 2.9 3.6 4.8 **** FASTEST WIND DIRECTION 250 250 270 180 310 200 180 250 *** 210 230 240 *** FASTEST WIND SPEED (KNOTS) 21 21 21 21 25 23 16 19 *** 16 25 23 *** DAY 6 28 5 9 12 27 27 7 ** 26 9 17 DAYS WITH SKY CLEAR (0-2)/8 12 6 11 10 22 28 26 29 30 18 19 12 223 DAYS WITH P.CLOUDY (3-6)/8 11 7 12 13 7 2 4 2 0 11 9 7 85 DAYS WITH CLOUDY (7-8)/8 8 15 8 7 2 0 0 0 0 2 2 12 56 DAYS WITH VISIBILITY =< 2 KM 3 2 0 0 0 0 0 0 0 0 0 2 7 DURATION OF SUNSHINE HOURS 108.3 ****** 154.2 ****** ****** 278.3 ****** ****** ****** ****** ****** 99.4 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 857.6 854.9 858.5 854.4 855.8 854.8 855.4 856.2 857.4 860.4 859.1 859.9 857.0 MAX. QFE PRESSURE IN HPA 866.8 863.8 867.8 861.2 862.0 859.3 860.0 862.5 862.1 869.0 867.0 870.0 870.0 DAY-HOUR 26- 6 8- 6 9- 9 25- 6 16- 6 30- 6 9- 6 29- 6 23- 6 15- 6 23- 6 28- 6 MIN. QFE PRESSURE IN HPA 848.0 843.0 852.5 843.5 847.0 849.0 851.5 852.0 853.4 853.5 852.1 850.8 843.0 DAY-HOUR 4-12 15-12 31-15 2- 3 2- 3 15-12 29-12 6-12 30-12 25-15 9- 6 24-15 MEAN QNH PRESSURE IN HPA 1021.5 1018.3 1022.5 1017.7 1019.3 1018.3 1018.9 1019.8 1021.2 1024.7 1023.1 1024.1 1020.8 MAX. QNH PRESSURE IN HPA 1032.1 1028.6 1033.2 1025.6 1026.5 1023.4 1024.2 1027.1 1026.6 1034.6 1032.3 1035.7 1035.7 DAY-HOUR 26- 6 8- 6 9- 9 25- 6 16- 6 30- 6 9- 6 29- 6 23- 6 15- 6 23- 6 28- 6 MIN. QNH PRESSURE IN HPA 1010.4 1004.6 1015.6 1005.2 1009.2 1011.5 1014.4 1015.0 1016.6 1016.7 1015.1 1013.6 1004.6 DAY-HOUR 4-12 15-12 31-15 2- 3 2- 3 15-12 29-12 6-12 30-12 25-15 9- 6 24-15 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 857.2 854.6 858.4 854.2 855.9 855.3 856.1 856.9 857.8 860.6 858.9 ****** ****** MAX. QFE PRESSURE IN HPA 865.5 863.0 866.4 861.0 861.0 858.8 859.5 862.0 861.2 868.0 866.0 ****** ****** DAY 26 8 17 25 16 30 9 29 23 16 23 ** MIN. QFE PRESSURE IN HPA 849.0 846.0 853.0 843.5 847.0 849.4 852.6 853.0 854.0 854.4 852.2 ****** ****** DAY 4 15 5 2 2 27 28 7 5 1 9 ** MEAN QNH PRESSURE IN HPA 1021.1 1018.0 1022.4 1017.5 1019.5 1018.8 1019.7 1020.6 1021.7 1024.9 1023.0 ****** ****** MAX. QNH PRESSURE IN HPA 1030.6 1027.7 1031.6 1025.4 1025.4 1022.8 1023.6 1026.5 1025.6 1033.4 1031.1 ****** ****** DAY 26 8 17 25 16 30 9 29 23 16 23 ** MIN. QNH PRESSURE IN HPA 1011.5 1008.1 1016.2 1005.2 1009.2 1012.0 1015.7 1016.2 1017.3 1017.8 1015.2 ****** ****** DAY 4 15 5 2 2 27 28 7 5 1 9 ** MEAN QFF PRESSURE IN HPA 1027.8 1022.8 1023.7 1015.3 1013.6 1009.4 1008.0 1010.3 1013.8 1020.7 1018.5 ****** ****** MAX. QFF PRESSURE IN HPA 1043.1 1033.1 1039.8 1022.6 1020.6 1013.8 1013.4 1016.4 1018.6 1033.4 1033.1 ****** ****** DAY 26 1 17 4 16 8 8 29 23 16 14 ** MIN. QFF PRESSURE IN HPA 1013.9 1010.6 1013.6 1005.2 1001.9 999.4 1003.8 1005.0 1008.4 1010.0 1009.2 ****** ****** DAY 4 15 24 2 2 27 29 15 5 1 9 ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 858.2 855.5 859.2 854.8 856.5 855.7 856.5 857.4 858.5 861.4 860.0 860.5 857.8 MAX. QFE PRESSURE IN HPA 866.8 863.8 867.0 861.2 862.0 859.3 860.0 862.5 862.1 869.0 867.0 870.0 870.0 DAY 26 8 9 25 16 30 9 29 23 15 23 28 MIN. QFE PRESSURE IN HPA 849.5 843.5 853.8 847.0 848.5 849.8 853.2 853.6 854.8 855.3 852.1 854.8 843.5 DAY 4 19 11 1 2 15 29 7 5 1 9 24 MEAN QNH PRESSURE IN HPA 1022.1 1019.0 1023.4 1018.3 1020.2 1019.2 1020.2 1021.2 1022.5 1025.8 1024.2 1024.8 1021.7 MAX. QNH PRESSURE IN HPA 1032.1 1028.6 1032.3 1025.6 1026.5 1023.4 1024.2 1027.1 1026.6 1034.6 1032.3 1035.7 1035.7 DAY 26 8 9 25 16 30 9 29 23 15 23 28 MIN. QNH PRESSURE IN HPA 1012.1 1005.2 1017.1 1009.2 1011.0 1012.5 1016.4 1016.8 1018.2 1018.8 1015.1 1018.2 1005.2 DAY 4 19 11 1 2 15 29 7 5 1 9 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 858.2 855.4 859.1 854.7 856.0 855.2 855.6 856.4 857.5 860.8 859.5 860.3 857.4 MAX. QFE PRESSURE IN HPA 866.5 863.8 867.8 861.0 860.0 859.0 859.0 861.6 861.5 869.0 866.0 870.0 870.0 DAY 26 8 9 24 15 8 8 29 23 15 22 28 MIN. QFE PRESSURE IN HPA 849.0 844.0 853.0 846.0 848.0 849.8 852.0 853.0 854.0 855.8 853.1 853.0 844.0 DAY 4 15 24 1 12 15 29 7 4 26 9 24 MEAN QNH PRESSURE IN HPA 1022.1 1019.0 1023.2 1018.1 1019.6 1018.7 1019.2 1020.1 1021.3 1025.1 1023.7 1024.5 1021.2 MAX. QNH PRESSURE IN HPA 1031.7 1028.6 1033.2 1025.4 1024.2 1023.1 1023.1 1026.1 1026.0 1034.6 1031.1 1035.7 1035.7 DAY 26 8 9 24 15 8 8 29 23 15 22 28 MIN. QNH PRESSURE IN HPA 1011.5 1005.8 1016.2 1008.1 1010.4 1012.5 1015.0 1016.2 1017.3 1019.4 1016.3 1016.2 1005.8 DAY 4 15 24 1 12 15 29 7 4 26 9 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 856.9 854.2 857.5 854.1 855.2 854.2 854.5 855.1 856.4 859.7 858.3 859.4 856.3 MAX. QFE PRESSURE IN HPA 865.6 862.0 864.0 860.0 859.2 858.0 858.5 860.0 860.0 868.5 865.0 870.0 870.0 DAY 26 8 17 24 27 4 15 29 23 15 22 28 MIN. QFE PRESSURE IN HPA 848.0 843.0 852.6 844.0 847.8 849.0 851.5 852.0 853.4 855.0 852.5 851.0 843.0 DAY 4 15 11 1 12 15 29 6 30 14 9 24 MEAN QNH PRESSURE IN HPA 1020.7 1017.6 1021.4 1017.4 1018.7 1017.5 1017.9 1018.6 1020.1 1023.8 1022.3 1023.6 1020.0 MAX. QNH PRESSURE IN HPA 1030.7 1026.5 1028.8 1024.2 1023.3 1021.9 1022.5 1024.2 1024.2 1034.0 1030.0 1035.7 1035.7 DAY 26 8 17 24 27 4 15 29 23 15 22 28 MIN. QNH PRESSURE IN HPA 1010.4 1004.6 1015.7 1005.8 1010.2 1011.5 1014.4 1015.0 1016.6 1018.5 1015.6 1013.8 1004.6 DAY 4 15 11 1 12 15 29 6 30 14 9 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 857.5 854.6 858.2 854.2 855.2 854.0 854.3 855.1 856.7 859.7 858.6 859.5 856.5 MAX. QFE PRESSURE IN HPA 865.4 862.0 867.0 860.0 859.2 858.2 858.5 859.5 859.8 868.5 865.4 870.0 870.0 DAY 26 7 9 24 27 4 15 29 8 15 22 28 MIN. QFE PRESSURE IN HPA 849.0 844.0 852.5 845.0 848.0 849.0 852.0 852.0 853.4 853.5 852.9 850.8 844.0 DAY 4 15 31 1 12 15 2 7 30 25 9 24 MEAN QNH PRESSURE IN HPA 1021.4 1018.0 1022.2 1017.5 1018.7 1017.3 1017.6 1018.6 1020.4 1023.9 1022.6 1023.7 1020.2 MAX. QNH PRESSURE IN HPA 1030.4 1026.5 1032.3 1024.2 1023.3 1022.1 1022.5 1023.6 1024.0 1034.0 1030.4 1035.7 1035.7 DAY 26 7 9 24 27 4 15 29 8 15 22 28 MIN. QNH PRESSURE IN HPA 1011.5 1005.8 1015.6 1006.9 1010.4 1011.5 1015.0 1015.0 1016.6 1016.7 1016.0 1013.6 1005.8 DAY 4 15 31 1 12 15 2 7 30 25 9 24 MEAN QFF PRESSURE IN HPA 1028.2 1022.5 1023.3 1015.5 1012.8 1008.0 1006.0 1008.2 1012.6 1019.7 1018.5 ****** ****** MAX. QFF PRESSURE IN HPA 1043.3 1032.2 1036.7 1023.0 1017.4 1012.3 1011.6 1013.7 1016.6 1034.0 1030.3 ****** ****** DAY 26 7 17 4 15 23 8 29 8 15 14 ** MIN. QFF PRESSURE IN HPA 1014.3 1008.3 1012.8 1004.6 1005.8 1001.6 1002.4 1003.9 1008.7 1011.1 1010.2 ****** ****** DAY 4 15 31 28 11 26 17 14 4 25 8 ** 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.4 ***** 6.5 13.9 16.9 23.3 26.9 27.5 22.3 15.4 9.0 -1.4 ***** MINIMUN AIR TEMPERATURE (C) -7.8 -7.0 0.7 5.2 8.3 12.5 16.8 16.5 11.7 8.0 3.4 -4.4 5.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 3 0 0 0 0 6 DAYS WITH MINIMUM TEMP. <=-4 22 17 3 0 0 0 0 0 0 0 0 17 59 DAYS WITH FREEZING MIN.<= 0 31 23 14 1 0 0 0 0 0 0 7 22 98 TEMPERATURE RECORDS LOWEST(C) -22.0 -17.0 -11.0 -3.0 3.0 8.0 13.0 8.8 7.4 2.6 -2.0 -14.0 -22.0 DAY 25 5 11 20 3 3 8 31 28 30 23 7 MAXIMUM AIR TEMPERATURE (C) 0.7 2.3 9.0 17.7 21.2 28.4 32.3 33.5 28.3 20.7 13.3 1.2 17.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 27 27 12 0 0 0 78 DAYS WITH MAXIMUM TEMP. <= 0 12 10 2 0 0 0 0 0 0 0 0 13 37 TEMPERATURE RECORDS HIGHEST(C) 5.6 8.6 21.0 25.0 25.2 36.0 38.0 39.0 34.0 25.6 17.2 10.0 39.0 DAY 4 28 30 25 27 30 30 1 1 6 2 9 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 9.3 8.3 12.5 12.9 15.9 15.5 17.0 16.6 12.7 9.9 5.6 12.1 MEAN DAILY TEMP. (MDT) (C) -3.5 -2.4 4.9 11.4 14.7 20.4 24.5 25.0 20.0 14.4 8.3 -1.6 11.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 25.9 109.6 125.4 11.7 0.0 0.0 0.0 272.6 HEATING DEG. DAYS(BASE 18 0C) 668.0 569.9 407.4 197.8 100.8 6.0 0.0 0.0 7.1 114.0 289.7 608.8 2969.5 DEWPOINT (MEAN C) -5.2 ***** -0.0 2.9 5.0 7.8 8.6 7.8 2.7 4.3 0.8 -4.8 ***** MIXING RATIO (G/KG) 3.13 ****** 4.67 5.62 6.55 7.96 8.55 8.26 5.74 6.23 4.90 3.33 ****** VAPOUR PRESSURE (HPA) 4.29 ****** 6.37 7.67 8.91 10.79 11.55 11.16 7.83 8.51 6.72 4.54 ****** SATURATION DEF. (HPA) 1.04 ****** 3.95 9.00 11.04 19.12 25.36 27.56 20.84 9.78 5.24 1.19 ****** RELATIVE HUMIDITY (MEAN %) 82 *** 67 51 49 40 35 33 32 53 61 80 *** RELATIVE HUMIDITY (MAX. %) 92 87 84 72 74 64 56 54 59 80 82 91 75 RELATIVE HUMIDITY (MIN. %) 73 68 55 36 34 26 22 21 17 35 39 68 41 RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** 73 64 56 54 59 77 81 87 *** RELATIVE HUMIDITY (MEAN% 09UTC) 80 76 65 46 45 34 30 29 24 42 54 78 50 RELATIVE HUMIDITY (MEAN% 15UTC) 82 75 66 45 35 29 24 23 23 49 56 77 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.0 93.3 179.4 56.7 11.4 0.0 0.0 0.0 0.0 30.4 106.1 217.4 736.7 DAYS WITH PRECIPITATION >=10 2 4 5 3 0 0 0 0 0 1 2 6 23 DAYS WITH PRECIPITATION >= 5 4 5 7 3 1 0 0 0 0 3 3 10 36 DAYS WITH PRECIPITATION >= 1 8 7 13 8 3 0 0 0 0 6 4 12 61 DAYS WITH PRECIPITATION 8 9 14 9 4 0 0 0 0 8 4 15 71 GREATEST DAILY PRECIPITATION 13.0 34.0 49.0 23.0 6.0 0.0 0.0 0.0 0.0 12.0 85.0 74.0 85.0 DAY 31 26 6 4 16 ** ** ** ** 16 4 9 DAY WITH THUNDER STORM 0 2 0 1 0 0 0 0 0 1 1 2 7 DAYS WITH SNOW OR SLEET 5 8 7 0 0 0 0 0 0 0 0 13 33 DAYS WITH DUST 0 0 0 0 0 0 0 0 2 0 0 0 2 WIND DIRECTION (PREVAILING) 180 *** 225 225 225 225 45 225 225 225 225 225 *** PREVAILING WIND SPEED(KNOTS) 9.3 **** 9.6 11.1 12.8 9.5 6.9 9.6 11.8 9.4 9.8 10.4 **** PREVAILING WIND PERCENT 11.6 ***** 12.9 30.1 28.8 10.0 9.2 7.1 18.7 16.8 11.5 9.7 ***** CALMS PERCENT OF WIND 70.5 ***** 57.3 30.8 41.8 67.3 69.9 71.4 64.0 68.4 77.0 69.5 ***** NO. OF WIND OBSERVATION 129 112 124 133 153 150 153 154 150 155 148 154 1715 VECTOR WIND DIRECTION (MEAN) 172 *** 185 206 223 251 297 279 237 217 216 180 *** VECTOR WIND MAGNITUDE(KNOTS) 1.7 **** 2.2 4.6 4.2 0.8 0.2 0.6 2.5 1.9 1.5 1.7 **** WIND STEADINESES (MEAN %) 65.4 ***** 59.5 67.6 71.2 30.8 8.3 26.1 71.4 73.1 78.9 68.0 ***** WIND SPEED (MEAN KNOTS) 2.6 **** 3.7 6.8 5.9 2.6 2.4 2.3 3.5 2.6 1.9 2.5 **** FASTEST WIND DIRECTION 150 *** 150 270 250 240 210 150 230 230 220 210 *** FASTEST WIND SPEED (KNOTS) 14 *** 17 31 21 17 16 14 27 16 14 16 *** DAY 18 ** 7 18 16 1 7 6 19 24 1 9 DAYS WITH SKY CLEAR (0-2)/8 9 10 6 16 20 28 30 28 28 17 21 9 222 DAYS WITH P.CLOUDY (3-6)/8 11 12 10 10 8 2 1 3 2 7 4 11 81 DAYS WITH CLOUDY (7-8)/8 11 6 15 4 3 0 0 0 0 7 5 11 62 DAYS WITH VISIBILITY =< 2 KM 4 3 4 0 0 0 0 0 0 1 0 5 17 DURATION OF SUNSHINE HOURS 87.4 148.5 125.4 225.1 290.8 339.1 359.3 277.5 285.1 214.1 182.9 80.2 2615.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 858.2 ****** 856.2 856.8 855.5 854.6 852.2 851.7 857.1 859.0 859.2 855.0 ****** MAX. QFE PRESSURE IN HPA 866.8 ****** 862.0 862.9 861.4 861.0 857.0 855.4 862.5 862.8 864.5 864.0 ****** DAY-HOUR 12- 9 **-** 11- 6 19- 6 25- 3 17- 6 11- 6 13- 6 15- 6 13- 6 24- 9 17- 6 MIN. QFE PRESSURE IN HPA 849.0 ****** 844.0 848.5 846.2 848.0 846.5 847.4 851.0 854.4 851.4 845.0 ****** DAY-HOUR 31- 6 **-** 6-15 4-12 16-15 10-15 13-12 11-15 3-12 25-12 30-15 4-12 MEAN QNH PRESSURE IN HPA 1022.1 ****** 1019.9 1020.5 1019.0 1018.0 1015.2 1014.6 1020.9 1023.1 1023.3 1018.5 ****** MAX. QNH PRESSURE IN HPA 1032.1 ****** 1026.5 1027.6 1025.8 1025.4 1020.8 1018.9 1027.1 1027.4 1029.4 1028.8 ****** DAY-HOUR 12- 9 **-** 11- 6 19- 6 25- 3 17- 6 11- 6 13- 6 15- 6 13- 6 24- 9 17- 6 MIN. QNH PRESSURE IN HPA 1011.5 ****** 1005.8 1011.0 1008.3 1010.4 1008.7 1009.7 1013.8 1017.8 1014.3 1006.9 ****** DAY-HOUR 31- 6 **-** 6-15 4-12 16-15 10-15 13-12 11-15 3-12 25-12 30-15 4-12 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 ****** ****** ****** 857.7 855.9 855.4 852.8 852.3 857.4 859.1 859.1 854.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 862.0 861.4 860.6 856.8 855.0 861.8 862.0 863.5 863.5 ****** DAY ** ** ** 19 25 17 12 9 15 13 12 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** 849.0 851.2 849.0 849.0 849.0 852.2 856.0 854.0 846.8 ****** DAY ** ** ** 4 17 11 15 6 19 10 21 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1021.5 1019.5 1019.0 1015.9 1015.3 1021.2 1023.2 1023.2 1018.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1026.5 1025.8 1024.9 1020.5 1018.5 1026.3 1026.5 1028.3 1028.3 ****** DAY ** ** ** 19 25 17 12 9 15 13 12 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** 1011.5 1014.1 1011.5 1011.5 1011.5 1015.2 1019.6 1017.3 1009.0 ****** DAY ** ** ** 4 17 11 15 6 19 10 21 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.8 1009.6 1004.4 1003.7 1013.1 1018.6 1022.1 1023.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.5 1015.4 1010.9 1007.9 1019.6 1023.6 1028.6 1036.6 ****** DAY ** ** ** ** 25 1 12 14 27 17 27 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1007.1 1001.5 1000.5 997.2 1004.2 1013.9 1015.7 1010.9 ****** DAY ** ** ** ** 28 27 23 6 19 15 21 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 858.5 857.8 856.9 857.4 856.3 855.6 853.1 852.7 858.1 859.9 859.8 855.2 856.8 MAX. QFE PRESSURE IN HPA 866.5 865.5 862.0 862.9 861.4 861.0 857.0 855.4 862.5 862.8 864.0 864.0 866.5 DAY 13 15 11 19 25 17 11 13 15 13 12 17 MIN. QFE PRESSURE IN HPA 849.0 848.0 845.8 849.5 852.0 849.0 849.0 850.0 853.0 856.8 855.0 846.0 845.8 DAY 31 4 6 9 22 11 15 6 3 15 4 4 MEAN QNH PRESSURE IN HPA 1022.5 1021.6 1020.6 1021.3 1019.9 1019.1 1016.3 1015.8 1022.0 1024.1 1024.0 1018.7 1020.5 MAX. QNH PRESSURE IN HPA 1031.7 1030.6 1026.5 1027.6 1025.8 1025.4 1020.8 1018.9 1027.1 1027.4 1028.8 1028.8 1031.7 DAY 13 15 11 19 25 17 11 13 15 13 12 17 MIN. QNH PRESSURE IN HPA 1011.5 1010.4 1007.9 1012.1 1015.0 1011.5 1011.5 1012.7 1016.2 1020.5 1018.5 1008.1 1007.9 DAY 31 4 6 9 22 11 15 6 3 15 4 4 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 858.4 857.9 856.7 856.8 855.6 854.9 852.5 851.9 857.4 859.4 859.9 855.5 856.4 MAX. QFE PRESSURE IN HPA 866.8 866.0 862.0 862.3 860.0 860.5 857.0 855.0 861.8 862.8 864.5 864.0 866.8 DAY 12 15 11 19 25 17 11 8 15 20 24 17 MIN. QFE PRESSURE IN HPA 850.0 850.0 845.0 849.0 851.6 848.4 848.4 849.0 852.0 855.5 854.4 845.5 845.0 DAY 31 4 6 4 22 11 15 25 3 25 30 4 MEAN QNH PRESSURE IN HPA 1022.3 1021.9 1020.4 1020.6 1019.2 1018.4 1015.6 1014.9 1021.2 1023.5 1024.1 1019.0 1020.1 MAX. QNH PRESSURE IN HPA 1032.1 1031.1 1026.5 1026.9 1024.2 1024.8 1020.8 1018.5 1026.3 1027.4 1029.4 1028.8 1032.1 DAY 12 15 11 19 25 17 11 8 15 20 24 17 MIN. QNH PRESSURE IN HPA 1012.7 1012.7 1006.9 1011.5 1014.5 1010.9 1010.9 1011.5 1015.0 1019.0 1017.8 1007.5 1006.9 DAY 31 4 6 4 22 11 15 25 3 25 30 4 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 857.3 857.0 855.7 856.2 854.9 853.8 851.4 850.8 856.3 858.3 858.8 854.8 855.4 MAX. QFE PRESSURE IN HPA 865.8 865.0 861.8 861.2 860.0 859.0 856.0 854.0 860.5 862.0 863.0 863.2 865.8 DAY 12 15 11 19 24 17 11 8 15 20 24 17 MIN. QFE PRESSURE IN HPA 849.0 850.0 844.1 848.5 849.0 848.0 846.5 848.0 851.0 854.4 852.8 845.0 844.1 DAY 31 3 6 4 16 11 13 25 3 25 30 4 MEAN QNH PRESSURE IN HPA 1021.2 1020.8 1019.3 1019.8 1018.3 1017.1 1014.3 1013.6 1019.9 1022.3 1022.8 1018.2 1019.0 MAX. QNH PRESSURE IN HPA 1030.9 1030.0 1026.3 1025.6 1024.2 1023.1 1019.6 1017.3 1024.8 1026.5 1027.7 1027.9 1030.9 DAY 12 15 11 19 24 17 11 8 15 20 24 17 MIN. QNH PRESSURE IN HPA 1011.5 1012.7 1005.9 1011.0 1011.5 1010.4 1008.7 1010.4 1013.8 1017.8 1015.9 1006.9 1005.9 DAY 31 3 6 4 16 11 13 25 3 25 30 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 857.7 857.2 855.6 856.3 854.9 853.4 850.9 850.6 856.5 858.4 858.6 854.8 855.4 MAX. QFE PRESSURE IN HPA 866.0 865.0 861.8 861.2 860.9 858.8 855.8 853.8 860.5 861.8 862.5 862.8 866.0 DAY 12 15 11 19 24 17 11 8 15 20 11 17 MIN. QFE PRESSURE IN HPA 850.0 849.5 844.0 848.5 846.2 848.0 846.5 847.4 852.0 854.5 851.4 845.0 844.0 DAY 25 3 6 4 16 10 13 11 3 25 30 31 MEAN QNH PRESSURE IN HPA 1021.5 1021.0 1019.2 1019.9 1018.3 1016.7 1013.8 1013.4 1020.2 1022.4 1022.6 1018.2 1018.9 MAX. QNH PRESSURE IN HPA 1031.1 1030.0 1026.3 1025.6 1025.3 1022.8 1019.4 1017.1 1024.8 1026.3 1027.1 1027.4 1031.1 DAY 12 15 11 19 24 17 11 8 15 20 11 17 MIN. QNH PRESSURE IN HPA 1012.7 1012.1 1005.8 1011.0 1008.3 1010.4 1008.7 1009.7 1015.0 1017.9 1014.3 1006.9 1005.8 DAY 25 3 6 4 16 10 13 11 3 25 30 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.6 1007.2 1002.2 1001.8 1012.3 1017.8 1021.4 1023.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.6 1013.2 1008.7 1006.8 1019.0 1024.2 1026.9 1037.0 ****** DAY ** ** ** ** 24 1 11 31 26 20 15 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1001.6 998.3 997.5 996.9 1005.7 1013.3 1013.1 1010.1 ****** DAY ** ** ** ** 16 26 15 1 3 25 30 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.5 -3.4 -1.6 9.5 13.2 20.7 25.5 23.8 20.4 15.9 7.0 0.5 10.5 MINIMUN AIR TEMPERATURE (C) -10.2 -7.2 -7.9 3.5 7.8 11.2 14.0 15.0 10.1 6.5 1.6 -3.4 3.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 23 18 23 1 0 0 0 0 0 0 3 11 79 DAYS WITH FREEZING MIN.<= 0 31 28 27 2 0 0 0 0 0 0 6 25 119 TEMPERATURE RECORDS LOWEST(C) -20.6 -21.6 -20.0 -5.8 0.6 7.6 10.4 11.0 5.6 1.0 -17.0 -18.4 -21.6 DAY 28 29 2 3 6 5 1 30 29 30 27 27 MAXIMUM AIR TEMPERATURE (C) -2.0 -0.2 2.7 13.3 16.8 25.2 30.9 28.6 26.0 21.5 11.6 2.9 14.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 22 12 5 0 0 0 40 DAYS WITH MAXIMUM TEMP. <= 0 22 13 10 0 0 0 0 0 0 0 2 8 55 TEMPERATURE RECORDS HIGHEST(C) 3.0 4.4 11.2 19.4 27.6 30.4 34.8 33.6 32.0 25.4 19.8 9.6 34.8 DAY 20 20 30 12 29 29 30 16 8 4 2 11 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 7.0 10.6 9.8 9.0 14.0 16.9 13.6 15.9 15.0 10.0 6.3 11.4 MEAN DAILY TEMP. (MDT) (C) -6.1 -3.7 -2.6 8.4 12.3 18.2 22.5 21.8 18.0 14.0 6.6 -0.3 9.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.4 49.7 37.5 3.0 0.0 0.0 0.0 90.6 HEATING DEG. DAYS(BASE 18 0C) 748.3 629.6 638.9 277.0 180.2 20.2 0.0 0.4 34.6 124.4 342.4 566.7 3562.8 DEWPOINT (MEAN C) -9.8 -7.0 -6.8 1.0 6.7 7.4 7.5 8.6 2.9 1.3 1.4 -4.6 0.7 MIXING RATIO (G/KG) 2.37 2.82 2.88 4.89 7.36 7.79 7.90 8.47 5.62 5.02 5.49 3.40 5.33 VAPOUR PRESSURE (HPA) 3.24 3.83 3.93 6.67 10.05 10.60 10.72 11.52 7.70 6.90 7.53 4.67 7.28 SATURATION DEF. (HPA) 1.07 1.15 1.99 5.65 5.89 14.86 23.45 19.19 17.92 12.12 3.40 1.95 9.05 RELATIVE HUMIDITY (MEAN %) 74 77 70 59 68 47 36 42 36 42 71 72 58 RELATIVE HUMIDITY (MAX. %) 85 88 85 79 86 74 64 65 62 70 89 84 78 RELATIVE HUMIDITY (MIN. %) 60 64 55 45 54 31 21 29 21 26 55 59 43 RELATIVE HUMIDITY (MEAN% 03UTC) 80 81 81 75 82 73 64 65 61 70 82 80 75 RELATIVE HUMIDITY (MEAN% 09UTC) 70 76 64 52 63 39 29 36 28 31 66 67 52 RELATIVE HUMIDITY (MEAN% 15UTC) 73 76 68 53 62 36 24 31 27 36 71 69 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 152.8 318.4 65.0 87.0 131.0 20.6 0.0 0.0 3.4 0.0 149.6 111.5 1039.3 DAYS WITH PRECIPITATION >=10 2 8 3 5 4 1 0 0 0 0 7 4 34 DAYS WITH PRECIPITATION >= 5 7 11 6 5 14 1 0 0 0 0 8 7 59 DAYS WITH PRECIPITATION >= 1 13 16 12 9 19 4 0 0 1 0 10 11 95 DAYS WITH PRECIPITATION 14 18 12 10 21 5 0 0 2 0 12 11 105 GREATEST DAILY PRECIPITATION 89.0 64.0 12.0 19.0 16.4 15.0 0.0 0.0 3.0 0.0 27.0 23.0 89.0 DAY 16 7 6 13 6 3 ** ** 27 ** 7 15 DAY WITH THUNDER STORM 0 0 0 0 6 2 0 0 0 0 2 0 10 DAYS WITH SNOW OR SLEET 11 14 9 2 1 0 0 0 0 0 3 8 48 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 2 0 0 3 WIND DIRECTION (PREVAILING) 135 135 225 180 225 225 225 45 225 225 225 180 225 PREVAILING WIND SPEED(KNOTS) 8.5 9.3 8.4 9.3 9.2 9.3 9.6 7.4 10.4 9.5 9.4 7.5 9.7 PREVAILING WIND PERCENT 12.3 16.6 9.0 18.1 11.0 17.3 7.1 8.4 12.7 14.2 16.1 15.5 11.5 CALMS PERCENT OF WIND 60.0 48.3 69.0 54.4 65.2 59.3 69.0 74.2 70.7 66.5 56.4 63.9 63.2 NO. OF WIND OBSERVATION 155 145 155 149 155 150 155 155 150 155 149 155 1828 VECTOR WIND DIRECTION (MEAN) 184 178 213 195 234 221 213 349 236 211 180 184 197 VECTOR WIND MAGNITUDE(KNOTS) 2.0 3.8 0.9 2.9 0.6 1.9 0.7 0.9 1.5 1.9 3.4 2.3 1.7 WIND STEADINESES (MEAN %) 57.1 73.1 36.0 67.4 23.1 59.4 28.0 39.1 62.5 67.9 81.0 82.1 53.1 WIND SPEED (MEAN KNOTS) 3.5 5.2 2.5 4.3 2.6 3.2 2.5 2.3 2.4 2.8 4.2 2.8 3.2 FASTEST WIND DIRECTION 240 220 340 160 210 180 140 40 220 200 210 220 180 FASTEST WIND SPEED (KNOTS) 23 19 16 16 17 45 14 16 19 29 19 16 45 DAY 16 8 9 11 19 26 20 29 25 10 23 7 DAYS WITH SKY CLEAR (0-2)/8 13 8 16 12 8 20 30 24 28 25 14 7 205 DAYS WITH P.CLOUDY (3-6)/8 6 8 9 10 10 8 1 5 2 6 11 11 87 DAYS WITH CLOUDY (7-8)/8 12 13 6 8 13 2 0 2 0 0 5 13 74 DAYS WITH VISIBILITY =< 2 KM 3 6 4 1 3 0 0 0 0 0 1 2 20 DURATION OF SUNSHINE HOURS 98.7 87.0 197.4 209.7 170.7 295.6 338.3 320.4 285.0 254.2 163.6 ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 855.3 850.7 855.9 856.1 860.0 857.3 855.8 858.8 860.7 862.0 861.6 858.9 857.8 MAX. QFE PRESSURE IN HPA 865.8 860.0 865.6 860.3 866.0 862.2 862.0 865.6 866.2 866.4 870.0 865.0 870.0 DAY-HOUR 5- 9 15-12 12- 9 20- 9 14- 9 11- 9 7- 6 31- 6 29- 6 29- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 840.2 841.5 845.0 850.0 851.8 852.8 851.0 852.0 855.7 856.6 848.0 853.0 840.2 DAY-HOUR 30-15 24-12 30-15 18- 3 9- 3 27-15 9-15 18-15 13-15 10-15 24-15 14-12 MEAN QNH PRESSURE IN HPA 1018.7 1013.5 1019.5 1019.7 1024.2 1021.1 1019.4 1022.8 1025.1 1026.5 1026.1 1022.9 1021.6 MAX. QNH PRESSURE IN HPA 1030.9 1024.2 1030.7 1024.6 1031.1 1026.8 1026.5 1030.7 1031.4 1031.6 1035.7 1030.0 1035.7 DAY-HOUR 5- 9 15-12 12- 9 20- 9 14- 9 11- 9 7- 6 31- 6 29- 6 29- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 1001.4 1002.9 1006.9 1012.7 1014.8 1015.9 1013.8 1015.0 1019.3 1020.3 1010.4 1016.2 1001.4 DAY-HOUR 30-15 24-12 30-15 18- 3 9- 3 27-15 9-15 18-15 13-15 10-15 24-15 14-12 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 854.9 850.2 855.6 855.8 859.9 857.4 856.4 859.5 861.1 862.1 861.4 858.6 857.7 MAX. QFE PRESSURE IN HPA 865.0 860.0 865.0 859.0 865.0 862.0 861.8 865.0 865.8 865.3 869.8 864.6 869.8 DAY 5 16 12 8 14 12 6 31 29 30 4 1 MIN. QFE PRESSURE IN HPA 842.0 843.0 846.0 850.0 851.8 854.0 851.5 855.0 856.0 858.5 851.0 853.2 842.0 DAY 31 24 31 18 9 17 10 1 25 10 25 15 MEAN QNH PRESSURE IN HPA 1018.3 1012.9 1019.2 1019.4 1024.1 1021.2 1020.1 1023.6 1025.5 1026.7 1025.9 1022.6 1021.6 MAX. QNH PRESSURE IN HPA 1030.0 1024.2 1030.0 1023.1 1030.0 1026.5 1026.3 1030.0 1030.9 1030.3 1035.5 1029.5 1035.5 DAY 5 16 12 8 14 12 6 31 29 30 4 1 MIN. QNH PRESSURE IN HPA 1003.5 1004.6 1008.1 1012.7 1014.8 1017.3 1014.4 1018.5 1019.6 1022.5 1013.8 1016.4 1003.5 DAY 31 24 31 18 9 17 10 1 25 10 25 15 MEAN QFF PRESSURE IN HPA 1026.3 1019.2 1025.2 1017.8 1020.0 1013.1 1009.6 1013.7 1018.4 1022.3 1026.0 1026.6 1019.8 MAX. QFF PRESSURE IN HPA 1043.6 1036.7 1041.9 1024.9 1026.0 1018.3 1016.7 1021.9 1027.9 1028.5 1036.4 1036.3 1043.6 DAY 5 16 12 3 14 11 6 31 29 30 27 29 MIN. QFF PRESSURE IN HPA 1008.6 1007.2 1008.2 1011.3 1010.2 1006.8 1002.0 1006.5 1010.9 1014.3 1014.8 1016.5 1002.0 DAY 31 24 31 14 9 28 10 1 25 10 22 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 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 855.4 850.7 855.9 856.4 860.3 857.8 856.7 859.9 861.8 863.0 862.5 859.4 858.3 MAX. QFE PRESSURE IN HPA 865.0 859.8 865.0 860.0 865.8 862.2 862.0 865.6 866.2 866.4 870.0 865.0 870.0 DAY 5 16 12 21 14 12 7 31 29 29 4 1 MIN. QFE PRESSURE IN HPA 844.0 843.0 847.0 851.5 852.0 854.0 851.5 855.2 856.5 858.8 853.0 854.0 843.0 DAY 30 24 22 1 9 17 10 1 25 10 25 15 MEAN QNH PRESSURE IN HPA 1019.0 1013.5 1019.5 1020.0 1024.5 1021.7 1020.4 1024.1 1026.2 1027.7 1027.1 1023.5 1022.3 MAX. QNH PRESSURE IN HPA 1030.0 1024.0 1030.0 1024.2 1030.9 1026.8 1026.5 1030.7 1031.4 1031.6 1035.7 1030.0 1035.7 DAY 5 16 12 21 14 12 7 31 29 29 4 1 MIN. QNH PRESSURE IN HPA 1005.8 1004.6 1009.2 1014.4 1015.0 1017.3 1014.4 1018.7 1020.2 1022.8 1016.2 1017.3 1004.6 DAY 30 24 22 1 9 17 10 1 25 10 25 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.9 851.2 856.5 856.5 860.4 857.8 856.0 859.1 861.0 862.3 862.1 859.2 858.2 MAX. QFE PRESSURE IN HPA 865.8 860.0 865.6 860.3 866.0 862.2 861.5 864.8 865.0 865.8 868.8 865.0 868.8 DAY 5 16 12 20 14 11 7 31 28 29 4 10 MIN. QFE PRESSURE IN HPA 842.8 842.0 847.4 852.5 852.0 854.0 851.5 854.5 857.0 858.0 853.2 854.0 842.0 DAY 30 24 23 5 9 27 10 18 17 10 7 14 MEAN QNH PRESSURE IN HPA 1019.5 1014.0 1020.1 1020.2 1024.7 1021.6 1019.6 1023.2 1025.4 1026.9 1026.6 1023.3 1022.1 MAX. QNH PRESSURE IN HPA 1030.9 1024.2 1030.7 1024.6 1031.1 1026.8 1026.0 1029.8 1030.0 1030.9 1034.4 1030.0 1034.4 DAY 5 16 12 20 14 11 7 31 28 29 4 10 MIN. QNH PRESSURE IN HPA 1004.4 1003.5 1009.7 1015.6 1015.0 1017.3 1014.4 1017.9 1020.8 1021.9 1016.4 1017.3 1003.5 DAY 30 24 23 5 9 27 10 18 17 10 7 14 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 855.1 850.7 856.0 856.1 860.0 857.1 855.0 857.8 860.0 861.2 861.1 858.5 857.4 MAX. QFE PRESSURE IN HPA 865.0 860.0 865.0 859.8 865.4 862.0 860.3 863.4 864.0 864.5 867.2 864.4 867.2 DAY 4 15 12 20 14 11 6 31 28 29 3 10 MIN. QFE PRESSURE IN HPA 841.0 841.5 846.5 852.0 852.0 853.0 851.0 853.0 856.0 857.0 850.0 853.0 841.0 DAY 30 24 30 14 9 27 31 18 13 10 24 14 MEAN QNH PRESSURE IN HPA 1018.6 1013.5 1019.7 1019.7 1024.2 1020.9 1018.5 1021.7 1024.2 1025.6 1025.5 1022.4 1021.2 MAX. QNH PRESSURE IN HPA 1030.0 1024.2 1030.0 1024.0 1030.4 1026.5 1024.6 1028.1 1028.8 1029.4 1032.5 1029.3 1032.5 DAY 4 15 12 20 14 11 6 31 28 29 3 10 MIN. QNH PRESSURE IN HPA 1002.3 1002.9 1008.7 1015.0 1015.0 1016.2 1013.8 1016.2 1019.6 1020.8 1012.7 1016.2 1002.3 DAY 30 24 30 14 9 27 31 18 13 10 24 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 855.0 850.7 855.7 855.7 859.4 856.5 854.8 857.7 859.9 861.5 861.2 858.7 857.2 MAX. QFE PRESSURE IN HPA 865.0 860.0 864.0 859.5 864.4 861.4 860.0 863.0 864.0 864.7 867.8 864.4 867.8 DAY 4 15 12 20 14 11 6 31 28 29 17 10 MIN. QFE PRESSURE IN HPA 840.2 842.5 845.0 851.5 852.0 852.8 851.0 852.0 855.7 856.6 848.0 854.0 840.2 DAY 30 24 30 17 9 27 9 18 13 10 24 14 MEAN QNH PRESSURE IN HPA 1018.5 1013.5 1019.2 1019.3 1023.6 1020.2 1018.2 1021.6 1024.1 1026.0 1025.6 1022.7 1021.0 MAX. QNH PRESSURE IN HPA 1030.0 1024.2 1028.8 1023.6 1029.3 1025.8 1024.2 1027.7 1028.8 1029.6 1033.2 1029.3 1033.2 DAY 4 15 12 20 14 11 6 31 28 29 17 10 MIN. QNH PRESSURE IN HPA 1001.4 1004.0 1006.9 1014.4 1015.0 1015.9 1013.8 1015.0 1019.3 1020.3 1010.4 1017.3 1001.4 DAY 30 24 30 17 9 27 9 18 13 10 24 14 MEAN QFF PRESSURE IN HPA 1026.5 1019.7 1025.0 1017.7 1019.3 1012.2 1007.8 1011.7 1017.1 1021.6 1025.7 1026.8 1019.3 MAX. QFF PRESSURE IN HPA 1042.3 1034.6 1041.0 1023.5 1027.0 1017.9 1014.5 1019.3 1025.8 1026.9 1035.7 1038.0 1042.3 DAY 5 29 12 3 2 11 6 31 28 29 26 28 MIN. QFF PRESSURE IN HPA 1006.6 1006.3 1005.3 1009.7 1010.4 1006.4 1002.3 1004.1 1011.4 1011.7 1011.4 1017.3 1002.3 DAY 30 24 30 13 9 27 31 18 13 10 24 14 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.6 -1.9 3.9 10.7 15.2 21.9 26.0 25.1 22.8 14.3 5.1 0.5 11.8 MINIMUN AIR TEMPERATURE (C) -6.9 -6.2 -1.2 5.0 9.4 12.4 16.5 15.5 12.1 6.3 1.9 -2.9 5.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 21 18 5 0 0 0 0 0 0 0 3 10 57 DAYS WITH FREEZING MIN.<= 0 28 26 24 1 0 0 0 0 0 0 7 28 114 TEMPERATURE RECORDS LOWEST(C) -16.0 -18.0 -6.0 -1.0 3.6 8.0 11.4 11.0 8.4 0.5 -10.8 -11.4 -18.0 DAY 20 18 22 23 4 6 6 13 25 22 14 20 MAXIMUM AIR TEMPERATURE (C) -0.1 1.1 7.6 15.0 19.0 26.5 31.4 30.6 29.0 19.8 8.8 4.4 16.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 23 21 14 0 0 0 63 DAYS WITH MAXIMUM TEMP. <= 0 18 9 1 0 0 0 0 0 0 0 2 2 32 TEMPERATURE RECORDS HIGHEST(C) 8.0 11.6 19.2 24.0 24.0 33.0 35.4 34.6 32.4 26.0 19.6 10.0 35.4 DAY 28 28 31 19 31 30 16 31 1 1 8 28 DIF. BETWEEN (MAX.-MIN.) (C) 6.8 7.3 8.8 10.0 9.6 14.1 14.9 15.1 16.9 13.5 6.9 7.3 10.9 MEAN DAILY TEMP. (MDT) (C) -3.5 -2.5 3.2 10.0 14.2 19.5 23.9 23.0 20.6 13.0 5.3 0.7 10.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 10.2 93.1 62.1 13.2 0.0 0.0 0.0 178.7 HEATING DEG. DAYS(BASE 18 0C) 666.5 574.8 458.6 240.1 122.5 9.0 0.0 0.0 2.9 156.5 380.1 535.2 3146.2 DEWPOINT (MEAN C) -6.5 -6.6 -4.0 1.6 5.4 5.9 8.8 7.4 1.6 1.8 -0.9 -4.0 0.9 MIXING RATIO (G/KG) 2.87 2.90 3.42 5.12 6.76 7.01 8.52 7.81 5.30 5.21 4.43 3.39 5.23 VAPOUR PRESSURE (HPA) 3.95 3.99 4.69 7.00 9.23 9.56 11.59 10.65 7.26 7.18 6.08 4.67 7.15 SATURATION DEF. (HPA) 1.40 1.69 3.91 6.50 8.82 17.91 23.38 22.51 22.00 9.88 3.16 1.82 10.25 RELATIVE HUMIDITY (MEAN %) 76 72 61 58 56 39 37 36 29 48 68 74 55 RELATIVE HUMIDITY (MAX. %) 85 82 79 77 77 65 59 60 52 70 84 87 73 RELATIVE HUMIDITY (MIN. %) 67 62 48 43 39 25 25 22 16 31 50 56 40 RELATIVE HUMIDITY (MEAN% 03UTC) 78 79 76 72 74 64 59 60 51 67 76 79 70 RELATIVE HUMIDITY (MEAN% 09UTC) 76 68 58 52 49 30 31 30 23 37 60 69 49 RELATIVE HUMIDITY (MEAN% 15UTC) 76 69 55 52 51 29 26 25 20 43 65 72 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 46.0 134.8 101.8 151.0 119.8 6.8 0.0 2.0 0.0 73.0 173.0 84.2 892.4 DAYS WITH PRECIPITATION >=10 1 4 3 4 3 0 0 0 0 2 5 2 24 DAYS WITH PRECIPITATION >= 5 3 7 5 6 5 0 0 0 0 3 8 5 42 DAYS WITH PRECIPITATION >= 1 8 12 11 11 12 2 0 1 0 4 14 6 81 DAYS WITH PRECIPITATION 11 12 14 16 14 4 0 1 1 6 14 9 102 GREATEST DAILY PRECIPITATION 22.0 35.0 35.0 45.0 50.0 4.0 0.0 2.0 0.0 51.0 49.0 38.0 51.0 DAY 8 3 8 8 13 21 ** 7 ** 28 1 14 DAY WITH THUNDER STORM 0 0 2 3 2 0 1 1 0 1 6 0 16 DAYS WITH SNOW OR SLEET 10 11 8 1 0 0 0 0 0 0 5 6 41 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 180 180 225 225 225 45 360 270 225 180 180 225 PREVAILING WIND SPEED(KNOTS) 10.0 9.1 9.4 9.8 8.6 7.8 5.9 6.7 12.5 7.8 9.1 9.3 9.7 PREVAILING WIND PERCENT 14.3 7.9 11.6 26.7 18.7 12.7 10.4 11.0 14.7 6.4 11.0 5.5 10.8 CALMS PERCENT OF WIND 63.6 76.3 65.2 51.3 51.6 55.3 68.7 58.7 60.0 75.1 69.5 86.2 66.0 NO. OF WIND OBSERVATION 154 139 155 150 155 150 163 155 150 173 210 217 1971 VECTOR WIND DIRECTION (MEAN) 197 200 212 221 210 214 340 297 237 231 197 184 216 VECTOR WIND MAGNITUDE(KNOTS) 2.4 1.5 2.3 3.8 2.9 1.6 0.5 0.7 3.3 0.9 2.0 0.8 1.7 WIND STEADINESES (MEAN %) 70.6 75.0 65.7 80.9 70.7 48.5 26.3 21.9 70.2 50.0 74.1 66.7 56.7 WIND SPEED (MEAN KNOTS) 3.4 2.0 3.5 4.7 4.1 3.3 1.9 3.2 4.7 1.8 2.7 1.2 3.0 FASTEST WIND DIRECTION 270 210 240 240 210 190 240 340 230 250 260 150 340 FASTEST WIND SPEED (KNOTS) 19 16 19 23 16 17 14 29 29 23 23 17 29 DAY 24 27 19 19 26 28 8 8 3 27 13 1 DAYS WITH SKY CLEAR (0-2)/8 12 11 18 5 8 24 26 23 27 19 5 3 181 DAYS WITH P.CLOUDY (3-6)/8 10 8 5 18 12 6 5 8 3 9 10 13 107 DAYS WITH CLOUDY (7-8)/8 9 9 8 7 11 0 0 0 0 3 15 15 77 DAYS WITH VISIBILITY =< 2 KM 1 4 1 0 0 0 0 0 0 0 0 8 14 DURATION OF SUNSHINE HOURS 100.0 ****** 196.2 171.9 164.3 ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.9 860.6 858.3 858.3 859.2 858.3 858.0 859.0 859.8 864.7 860.8 863.4 860.0 MAX. QFE PRESSURE IN HPA 866.5 868.0 866.8 865.0 864.5 869.0 862.5 863.0 864.4 870.4 869.0 870.4 870.4 DAY-HOUR 19- 6 9- 9 30- 6 17- 6 9- 6 22- 6 27- 6 30- 6 16- 6 18- 6 21- 6 26- 9 MIN. QFE PRESSURE IN HPA 843.0 850.0 847.0 852.7 853.0 851.0 852.0 854.0 856.0 857.0 848.5 856.0 843.0 DAY-HOUR 8- 3 3- 3 5-12 11- 9 2-15 3-12 11-15 13-12 7-12 28-12 11- 3 5- 3 MEAN QNH PRESSURE IN HPA 1024.0 1024.9 1022.3 1022.3 1023.2 1022.3 1021.9 1023.0 1024.0 1029.6 1025.1 1028.2 1024.2 MAX. QNH PRESSURE IN HPA 1031.7 1033.4 1032.1 1030.0 1029.4 1034.6 1027.1 1027.7 1029.3 1036.2 1034.6 1036.2 1036.2 DAY-HOUR 19- 6 9- 9 30- 6 17- 6 9- 6 22- 6 27- 6 30- 6 16- 6 18- 6 21- 6 26- 9 MIN. QNH PRESSURE IN HPA 1004.6 1012.7 1009.2 1015.8 1016.2 1013.8 1015.0 1017.3 1019.6 1020.8 1011.0 1019.6 1004.6 DAY-HOUR 8- 3 3- 3 5-12 11- 9 2-15 3-12 11-15 13-12 7-12 28-12 11- 3 5- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.5 1031.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1037.4 1040.9 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 30- 6 20-15 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.1 1020.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 11- 0 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 860.7 863.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 868.5 868.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 21 27 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 849.0 856.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 11 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.0 1028.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1034.0 1034.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 21 27 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.5 1020.1 ****** DAY ** ** ** ** ** ** ** ** ** ** 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.0 1031.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1034.9 1037.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 30 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.1 1020.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 11 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.5 860.3 858.3 858.2 859.0 858.8 858.3 859.1 859.9 864.9 860.7 863.1 860.0 MAX. QFE PRESSURE IN HPA 865.6 867.0 866.4 864.3 864.0 868.5 861.8 862.0 864.0 870.0 868.5 868.0 870.0 DAY 15 10 31 17 9 22 27 24 16 18 21 26 MIN. QFE PRESSURE IN HPA 843.0 850.0 850.0 853.0 854.0 853.5 855.0 855.0 857.0 857.6 848.5 856.0 843.0 DAY 8 3 8 8 6 3 11 10 3 28 11 5 MEAN QNH PRESSURE IN HPA 1023.7 1024.6 1022.3 1022.2 1023.1 1022.8 1022.3 1023.2 1024.2 1029.9 1025.0 1027.8 1024.2 MAX. QNH PRESSURE IN HPA 1030.7 1032.3 1031.6 1029.2 1028.8 1034.0 1026.3 1026.5 1028.8 1035.7 1034.0 1033.4 1035.7 DAY 15 10 31 17 9 22 27 24 16 18 21 26 MIN. QNH PRESSURE IN HPA 1004.6 1012.7 1012.7 1016.2 1017.3 1016.7 1018.5 1018.5 1020.8 1021.5 1011.0 1019.6 1004.6 DAY 8 3 8 8 6 3 11 10 3 28 11 5 MEAN QFF PRESSURE IN HPA 1029.8 1030.3 1024.5 1019.8 1018.1 1014.2 1011.1 1012.8 1015.7 1025.9 1025.7 1031.5 1021.6 MAX. QFF PRESSURE IN HPA 1040.1 1039.9 1035.4 1025.9 1026.0 1027.9 1014.9 1018.1 1021.2 1031.5 1035.9 1038.2 1040.1 DAY 23 24 23 23 9 22 5 29 16 20 30 20 MIN. QFF PRESSURE IN HPA 1006.6 1016.9 1013.5 1008.4 1010.7 1008.5 1006.9 1006.6 1010.5 1016.6 1009.7 1020.8 1006.6 DAY 8 3 6 20 31 3 11 10 3 2 11 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 860.5 861.0 859.0 858.9 859.4 859.1 858.9 859.7 860.6 865.7 861.3 863.7 860.6 MAX. QFE PRESSURE IN HPA 866.5 867.5 866.8 865.0 864.5 869.0 862.5 863.0 864.4 870.4 869.0 869.4 870.4 DAY 19 9 30 17 9 22 27 30 16 18 21 26 MIN. QFE PRESSURE IN HPA 845.0 851.0 850.0 853.0 853.5 851.9 855.0 855.8 857.2 858.0 850.0 856.0 845.0 DAY 8 3 3 11 6 3 11 10 3 28 11 5 MEAN QNH PRESSURE IN HPA 1024.8 1025.4 1023.1 1022.9 1023.6 1023.1 1022.9 1023.9 1024.9 1030.8 1025.7 1028.5 1025.0 MAX. QNH PRESSURE IN HPA 1031.7 1032.9 1032.1 1030.0 1029.4 1034.6 1027.1 1027.7 1029.3 1036.2 1034.6 1035.0 1036.2 DAY 19 9 30 17 9 22 27 30 16 18 21 26 MIN. QNH PRESSURE IN HPA 1006.9 1013.8 1012.7 1016.2 1016.7 1014.9 1018.5 1019.4 1021.0 1021.9 1012.7 1019.6 1006.9 DAY 8 3 3 11 6 3 11 10 3 28 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.4 1032.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1037.4 1040.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 30 20 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.6 1021.1 ****** DAY ** ** ** ** ** ** ** ** ** ** 11 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 860.3 861.3 858.8 858.7 859.6 858.6 858.5 859.5 860.4 865.6 861.3 864.0 860.5 MAX. QFE PRESSURE IN HPA 866.5 868.0 866.6 865.0 864.0 868.2 862.3 863.0 864.1 870.0 868.8 870.4 870.4 DAY 19 9 30 17 8 22 27 30 15 17 21 26 MIN. QFE PRESSURE IN HPA 845.4 852.0 848.0 852.7 853.0 851.7 854.5 855.0 857.0 858.0 850.5 856.8 845.4 DAY 8 3 3 11 6 3 11 13 3 28 11 5 MEAN QNH PRESSURE IN HPA 1024.5 1025.7 1022.8 1022.7 1023.7 1022.6 1022.5 1023.6 1024.6 1030.7 1025.8 1028.9 1024.8 MAX. QNH PRESSURE IN HPA 1031.7 1033.4 1031.8 1030.0 1028.8 1033.7 1026.9 1027.7 1028.9 1035.7 1034.4 1036.2 1036.2 DAY 19 9 30 17 8 22 27 30 15 17 21 26 MIN. QNH PRESSURE IN HPA 1007.4 1015.0 1010.4 1015.8 1016.2 1014.7 1017.9 1018.5 1020.8 1021.9 1013.3 1020.5 1007.4 DAY 8 3 3 11 6 3 11 13 3 28 11 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 859.5 860.3 857.7 857.8 859.0 857.8 857.5 858.5 859.2 864.3 860.4 863.1 859.6 MAX. QFE PRESSURE IN HPA 865.8 867.5 865.8 864.0 864.0 867.0 861.2 861.0 863.2 868.6 867.2 869.0 869.0 DAY 19 9 30 16 8 22 27 24 15 17 21 26 MIN. QFE PRESSURE IN HPA 845.0 852.0 847.0 852.8 854.0 851.0 853.0 854.0 856.0 857.0 851.0 856.3 845.0 DAY 8 2 5 22 2 3 11 13 7 28 10 5 MEAN QNH PRESSURE IN HPA 1023.6 1024.5 1021.5 1021.7 1023.0 1021.7 1021.4 1022.5 1023.4 1029.1 1024.6 1027.8 1023.7 MAX. QNH PRESSURE IN HPA 1030.9 1032.9 1030.9 1028.8 1028.8 1032.3 1025.6 1025.4 1027.9 1034.1 1032.5 1034.6 1034.6 DAY 19 9 30 16 8 22 27 24 15 17 21 26 MIN. QNH PRESSURE IN HPA 1006.9 1015.0 1009.2 1015.9 1017.3 1013.8 1016.2 1017.3 1019.6 1020.8 1013.8 1020.0 1006.9 DAY 8 2 5 22 2 3 11 13 7 28 10 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.6 1030.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1034.3 1039.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 29 20 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.6 1020.2 ****** DAY ** ** ** ** ** ** ** ** ** ** 10 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.5 860.2 858.0 858.0 858.8 857.4 856.8 858.1 859.0 864.0 860.4 863.2 859.5 MAX. QFE PRESSURE IN HPA 866.0 868.0 866.0 864.0 863.5 866.0 860.1 861.0 863.6 868.5 867.0 869.2 869.2 DAY 19 9 30 16 8 22 27 28 15 17 21 26 MIN. QFE PRESSURE IN HPA 845.0 852.0 848.0 853.0 853.0 851.4 852.0 854.0 856.0 858.0 851.0 857.0 845.0 DAY 8 2 5 26 2 3 11 13 7 28 10 4 MEAN QNH PRESSURE IN HPA 1023.6 1024.5 1021.9 1021.9 1022.8 1021.2 1020.6 1022.0 1023.1 1028.9 1024.7 1027.9 1023.6 MAX. QNH PRESSURE IN HPA 1031.1 1033.4 1031.1 1028.8 1028.3 1031.1 1024.3 1025.4 1028.4 1034.0 1032.3 1034.8 1034.8 DAY 19 9 30 16 8 22 27 28 15 17 21 26 MIN. QNH PRESSURE IN HPA 1006.9 1015.0 1010.4 1016.2 1016.2 1014.3 1015.0 1017.3 1019.6 1021.9 1013.8 1020.8 1006.9 DAY 8 2 5 26 2 3 11 13 7 28 10 4 MEAN QFF PRESSURE IN HPA 1029.7 1030.1 1024.0 1019.5 1017.8 1012.6 1009.4 1011.7 1014.7 1024.9 1025.4 1031.6 1021.0 MAX. QFF PRESSURE IN HPA 1041.2 1041.1 1033.2 1024.9 1025.4 1023.6 1012.8 1016.3 1019.5 1029.7 1035.3 1040.9 1041.2 DAY 19 9 23 4 8 22 4 28 15 22 29 20 MIN. QFF PRESSURE IN HPA 1007.1 1018.8 1011.9 1009.2 1011.8 1007.5 1003.7 1007.5 1011.1 1016.4 1010.7 1022.7 1003.7 DAY 8 2 5 19 2 26 11 9 3 3 10 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 860.8 863.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 868.0 869.7 ****** DAY ** ** ** ** ** ** ** ** ** ** 20 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 851.0 857.5 ****** DAY ** ** ** ** ** ** ** ** ** ** 10 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.2 1028.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1033.4 1035.4 ****** DAY ** ** ** ** ** ** ** ** ** ** 20 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.8 1021.3 ****** DAY ** ** ** ** ** ** ** ** ** ** 10 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.9 1032.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1036.0 1040.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 29 20 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.0 1023.8 ****** DAY ** ** ** ** ** ** ** ** ** ** 10 4 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 1.5 6.1 12.6 16.0 20.7 24.2 24.6 19.0 13.7 7.4 -2.5 12.1 MINIMUN AIR TEMPERATURE (C) -1.6 -1.8 1.9 6.6 9.3 13.1 16.2 15.9 12.2 8.0 3.6 -5.5 6.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 8 8 0 0 0 0 0 0 0 0 0 17 33 DAYS WITH FREEZING MIN.<= 0 23 23 7 0 0 0 0 0 0 0 3 24 80 TEMPERATURE RECORDS LOWEST(C) -7.0 -7.6 -2.0 0.8 5.0 9.4 11.0 11.6 9.0 5.0 -3.0 -18.0 -18.0 DAY 25 4 2 4 7 30 1 3 22 11 9 22 MAXIMUM AIR TEMPERATURE (C) 5.2 5.5 10.6 18.6 22.1 27.3 30.8 31.8 25.8 20.3 11.7 1.2 17.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 5 19 28 1 0 0 0 54 DAYS WITH MAXIMUM TEMP. <= 0 2 1 0 0 0 0 0 0 0 0 0 12 15 TEMPERATURE RECORDS HIGHEST(C) 11.6 11.4 17.4 26.0 30.0 32.2 35.4 35.0 30.4 23.4 19.0 8.2 35.4 DAY 3 27 31 21 28 10 15 18 12 6 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 6.8 7.3 8.7 12.0 12.8 14.2 14.6 15.9 13.6 12.3 8.1 6.7 11.1 MEAN DAILY TEMP. (MDT) (C) 1.8 1.9 6.2 12.6 15.7 20.2 23.5 23.8 19.0 14.1 7.7 -2.2 12.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.5 14.3 79.9 87.7 1.3 0.0 0.0 0.0 184.7 HEATING DEG. DAYS(BASE 18 0C) 501.2 451.9 364.5 163.6 92.9 10.5 0.0 0.0 4.4 119.6 309.7 625.3 2643.6 DEWPOINT (MEAN C) -5.0 -5.1 -0.8 3.4 4.6 6.4 8.9 6.5 4.4 4.5 1.0 -8.7 1.7 MIXING RATIO (G/KG) 3.15 3.23 4.30 5.86 6.38 7.23 8.62 7.53 6.47 6.34 4.94 2.54 5.55 VAPOUR PRESSURE (HPA) 4.33 4.43 5.88 8.01 8.72 9.85 11.70 10.24 8.88 8.73 6.79 3.51 7.59 SATURATION DEF. (HPA) 2.68 2.57 3.93 7.30 10.36 15.72 19.64 21.94 13.98 7.48 3.80 1.90 9.27 RELATIVE HUMIDITY (MEAN %) 64 64 65 58 51 44 41 35 43 59 67 66 55 RELATIVE HUMIDITY (MAX. %) 82 82 85 82 75 65 63 54 63 81 84 84 75 RELATIVE HUMIDITY (MIN. %) 46 46 47 36 28 27 24 20 26 37 48 45 36 RELATIVE HUMIDITY (MEAN% 03UTC) 70 73 78 76 71 62 61 52 60 79 77 70 69 RELATIVE HUMIDITY (MEAN% 09UTC) 60 56 54 44 36 35 35 30 31 44 58 62 45 RELATIVE HUMIDITY (MEAN% 15UTC) 60 61 55 43 36 30 26 22 30 48 62 65 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 128.0 69.3 99.3 113.2 32.2 25.6 0.0 0.0 17.0 62.3 202.6 101.2 850.7 DAYS WITH PRECIPITATION >=10 5 3 4 4 2 1 0 0 1 2 5 3 30 DAYS WITH PRECIPITATION >= 5 9 5 7 5 2 1 0 0 2 6 9 5 51 DAYS WITH PRECIPITATION >= 1 10 10 10 12 5 2 0 0 2 7 15 11 84 DAYS WITH PRECIPITATION 11 15 12 14 7 3 0 0 2 7 16 13 100 GREATEST DAILY PRECIPITATION 31.0 22.0 27.0 45.0 13.0 22.8 0.0 0.0 11.0 21.0 53.0 34.0 53.0 DAY 2 28 12 1 4 28 ** ** 8 15 6 19 DAY WITH THUNDER STORM 1 1 1 7 3 2 0 0 2 1 4 0 22 DAYS WITH SNOW OR SLEET 6 13 5 0 0 0 0 0 0 0 2 12 38 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 1 1 WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 360 225 360 225 180 180 225 PREVAILING WIND SPEED(KNOTS) 9.1 10.7 8.0 9.8 10.3 8.5 5.2 9.5 6.8 7.5 10.1 10.1 9.7 PREVAILING WIND PERCENT 12.5 19.4 17.3 10.8 12.6 7.1 8.1 8.1 12.9 8.9 22.1 18.1 11.9 CALMS PERCENT OF WIND 67.3 54.5 58.1 67.1 63.2 72.9 68.5 69.8 66.7 71.4 48.3 59.3 64.0 NO. OF WIND OBSERVATION 248 222 248 240 247 240 248 248 240 248 240 248 2917 VECTOR WIND DIRECTION (MEAN) 200 205 206 207 216 257 308 264 348 209 200 193 210 VECTOR WIND MAGNITUDE(KNOTS) 1.8 3.1 2.4 1.7 2.0 0.9 0.6 0.7 1.1 1.0 4.5 3.4 1.6 WIND STEADINESES (MEAN %) 75.0 72.1 72.7 60.7 62.5 45.0 30.0 30.4 42.3 50.0 84.9 82.9 53.3 WIND SPEED (MEAN KNOTS) 2.4 4.3 3.3 2.8 3.2 2.0 2.0 2.3 2.6 2.0 5.3 4.1 3.0 FASTEST WIND DIRECTION 240 320 130 270 240 270 240 220 160 240 210 240 320 FASTEST WIND SPEED (KNOTS) 16 23 17 19 23 23 14 16 19 17 19 21 23 DAY 20 2 17 23 3 16 19 17 12 21 27 1 DAYS WITH SKY CLEAR (0-2)/8 11 8 7 15 20 21 29 31 18 18 7 10 195 DAYS WITH P.CLOUDY (3-6)/8 11 12 14 8 8 6 2 0 9 12 12 14 108 DAYS WITH CLOUDY (7-8)/8 9 8 10 7 3 3 0 0 3 1 11 7 62 DAYS WITH VISIBILITY =< 2 KM 5 1 2 0 0 0 0 0 0 0 1 3 12 DURATION OF SUNSHINE HOURS ****** ****** ****** 239.7 305.2 323.0 374.6 359.2 237.2 230.5 138.2 121.9 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.4 857.7 858.0 859.8 859.4 856.8 856.3 856.9 864.7 865.8 862.2 862.8 860.1 MAX. QFE PRESSURE IN HPA 870.0 868.8 864.7 867.0 866.0 860.2 861.4 863.0 869.7 871.6 871.5 871.0 871.6 DAY-HOUR 18-18 18- 9 1- 9 5- 9 18- 6 8- 6 2- 6 15- 6 23- 9 11- 9 2- 9 7- 9 MIN. QFE PRESSURE IN HPA 846.0 846.0 845.2 847.8 852.0 852.2 852.0 851.0 857.5 861.0 854.4 847.8 845.2 DAY-HOUR 31-21 1- 0 12- 0 1-15 4-15 3- 3 15-15 1-12 2-15 16-15 30-21 3-12 MEAN QNH PRESSURE IN HPA 1024.7 1021.5 1021.9 1024.0 1023.5 1020.6 1019.9 1020.6 1029.6 1030.9 1026.7 1027.5 1024.3 MAX. QNH PRESSURE IN HPA 1035.7 1034.4 1029.6 1032.3 1031.1 1024.5 1025.8 1027.7 1035.4 1037.6 1037.5 1036.9 1037.6 DAY-HOUR 18-18 18- 9 1- 9 5- 9 18- 6 8- 6 2- 6 15- 6 23- 9 11- 9 2- 9 7- 9 MIN. QNH PRESSURE IN HPA 1008.1 1008.1 1007.2 1010.2 1015.0 1015.2 1015.0 1013.8 1021.3 1025.4 1017.8 1010.2 1007.2 DAY-HOUR 31-21 1- 0 12- 0 1-15 4-15 3- 3 15-15 1-12 2-15 16-15 30-21 3-12 MEAN QFF PRESSURE IN HPA 1027.4 1024.2 1021.5 1019.5 1017.1 1011.2 1008.5 1009.0 1021.4 1025.9 1025.6 1033.1 1020.4 MAX. QFF PRESSURE IN HPA 1042.4 1040.9 1031.1 1030.0 1026.4 1020.2 1017.2 1015.6 1028.3 1033.9 1036.5 1049.2 1049.2 DAY-HOUR 18-21 18-18 1-18 5- 6 17-21 28-21 1- 9 15- 6 23- 6 11- 3 10- 3 7- 3 MIN. QFF PRESSURE IN HPA 1006.0 1006.9 1008.5 1006.7 1010.3 1004.7 1001.4 1001.2 1010.6 1018.6 1016.8 1011.8 1001.2 DAY-HOUR 31-21 1- 0 7- 3 1-15 31-21 3- 0 15-18 1-12 1- 0 14-21 23- 0 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 860.5 857.3 858.0 859.8 859.4 856.8 856.5 856.8 864.6 865.8 862.3 862.7 860.1 MAX. QFE PRESSURE IN HPA 869.0 868.0 863.4 865.5 865.4 859.2 860.3 862.0 868.9 871.0 870.0 870.0 871.0 DAY 19 19 2 5 18 8 3 15 24 11 2 7 MIN. QFE PRESSURE IN HPA 850.0 846.0 845.2 850.8 853.0 852.5 853.0 852.5 858.0 862.0 855.4 849.0 845.2 DAY 16 1 12 2 1 3 31 2 1 17 26 4 MEAN QNH PRESSURE IN HPA 1024.8 1021.1 1021.9 1024.0 1023.6 1020.6 1020.2 1020.6 1029.5 1030.9 1026.9 1027.4 1024.3 MAX. QNH PRESSURE IN HPA 1034.6 1033.4 1028.1 1030.6 1030.4 1023.3 1024.6 1026.5 1034.5 1036.9 1035.7 1035.7 1036.9 DAY 19 19 2 5 18 8 3 15 24 11 2 7 MIN. QNH PRESSURE IN HPA 1012.7 1008.1 1007.2 1013.6 1016.2 1015.6 1016.2 1015.6 1021.9 1026.5 1018.9 1011.5 1007.2 DAY 16 1 12 2 1 3 31 2 1 17 26 4 MEAN QFF PRESSURE IN HPA 1027.2 1023.3 1021.4 1019.2 1017.2 1011.2 1008.8 1008.8 1020.9 1025.3 1025.1 1032.5 1020.1 MAX. QFF PRESSURE IN HPA 1040.2 1040.0 1030.1 1028.3 1026.1 1019.4 1016.5 1013.5 1026.7 1032.2 1034.7 1048.1 1048.1 DAY 19 19 2 5 18 29 1 15 23 11 10 7 MIN. QFF PRESSURE IN HPA 1015.7 1006.9 1008.7 1011.5 1010.7 1004.7 1003.3 1003.0 1010.6 1019.8 1016.8 1015.2 1003.0 DAY 16 1 12 2 1 3 16 2 1 15 23 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.2 857.0 857.9 859.7 859.4 857.1 856.9 857.1 864.7 865.8 862.2 862.5 860.0 MAX. QFE PRESSURE IN HPA 868.4 867.5 863.2 865.9 865.4 860.0 861.0 862.5 868.8 871.0 870.4 870.0 871.0 DAY 19 19 2 5 18 8 2 15 24 11 2 7 MIN. QFE PRESSURE IN HPA 848.8 847.5 845.5 850.6 853.0 852.2 853.0 852.7 858.4 862.0 855.5 848.5 845.5 DAY 16 1 12 2 1 3 31 2 1 17 26 4 MEAN QNH PRESSURE IN HPA 1024.4 1020.8 1021.8 1023.8 1023.6 1020.8 1020.6 1020.9 1029.7 1030.9 1026.7 1027.0 1024.3 MAX. QNH PRESSURE IN HPA 1033.9 1032.9 1027.9 1031.0 1030.4 1024.2 1025.4 1027.1 1034.4 1036.9 1036.2 1035.7 1036.9 DAY 19 19 2 5 18 8 2 15 24 11 2 7 MIN. QNH PRESSURE IN HPA 1011.3 1009.8 1007.5 1013.4 1016.2 1015.2 1016.2 1015.8 1022.4 1026.5 1019.0 1011.0 1007.5 DAY 16 1 12 2 1 3 31 2 1 17 26 4 MEAN QFF PRESSURE IN HPA 1027.5 1023.4 1021.9 1019.9 1017.7 1011.8 1009.5 1009.9 1022.1 1026.7 1026.0 1033.0 1020.8 MAX. QFF PRESSURE IN HPA 1040.6 1039.6 1030.7 1030.0 1026.2 1019.1 1017.1 1015.0 1027.9 1033.9 1036.5 1049.2 1049.2 DAY 19 19 2 5 18 29 1 15 23 11 10 7 MIN. QFF PRESSURE IN HPA 1013.9 1011.1 1008.5 1011.8 1011.5 1005.1 1004.0 1004.6 1011.9 1021.1 1017.6 1015.1 1004.0 DAY 16 1 7 2 2 2 16 1 1 15 23 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 860.9 857.7 858.5 860.3 859.9 857.5 857.3 857.8 865.3 866.3 862.5 862.9 860.6 MAX. QFE PRESSURE IN HPA 869.0 868.0 864.4 866.8 866.0 860.2 861.4 863.0 869.5 871.3 871.0 870.4 871.3 DAY 9 18 18 5 18 8 2 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 849.2 850.0 846.2 851.3 854.0 853.0 853.5 853.0 859.0 862.2 855.5 849.0 846.2 DAY 16 1 12 2 1 2 30 2 1 17 17 4 MEAN QNH PRESSURE IN HPA 1025.2 1021.6 1022.5 1024.5 1024.1 1021.4 1021.1 1021.7 1030.3 1031.5 1027.1 1027.5 1024.9 MAX. QNH PRESSURE IN HPA 1034.6 1033.4 1029.3 1032.1 1031.1 1024.5 1025.8 1027.7 1035.2 1037.2 1036.9 1036.2 1037.2 DAY 9 18 18 5 18 8 2 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1011.8 1012.7 1008.3 1014.2 1017.3 1016.2 1016.7 1016.2 1023.1 1026.8 1019.0 1011.5 1008.3 DAY 16 1 12 2 1 2 30 2 1 17 17 4 MEAN QFF PRESSURE IN HPA 1028.4 1024.6 1022.4 1020.2 1017.6 1011.9 1009.5 1010.0 1022.3 1026.6 1026.3 1033.6 1021.1 MAX. QFF PRESSURE IN HPA 1040.6 1040.1 1031.0 1030.0 1025.6 1019.0 1017.1 1015.6 1028.3 1032.8 1035.9 1049.1 1049.1 DAY 19 19 2 5 18 29 1 15 23 11 9 7 MIN. QFF PRESSURE IN HPA 1014.6 1014.2 1008.8 1010.6 1012.1 1005.4 1003.2 1004.5 1013.1 1021.0 1017.8 1013.8 1003.2 DAY 16 1 7 30 5 2 30 1 1 14 23 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 861.2 858.2 858.7 860.3 859.8 857.3 856.9 857.6 865.4 866.5 862.7 863.3 860.7 MAX. QFE PRESSURE IN HPA 869.9 868.8 864.7 867.0 866.0 860.0 861.0 862.2 869.7 871.6 871.5 871.0 871.6 DAY 9 18 1 5 18 8 2 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 850.0 850.0 847.5 852.0 854.0 853.0 853.0 852.5 859.0 863.0 855.8 848.0 847.5 DAY 16 12 12 2 1 3 30 1 2 16 17 3 MEAN QNH PRESSURE IN HPA 1025.6 1022.1 1022.7 1024.6 1023.9 1021.1 1020.7 1021.5 1030.5 1031.8 1027.4 1028.0 1025.0 MAX. QNH PRESSURE IN HPA 1035.6 1034.4 1029.6 1032.3 1031.1 1024.2 1025.4 1026.8 1035.4 1037.6 1037.5 1036.9 1037.6 DAY 9 18 1 5 18 8 2 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1012.7 1012.7 1009.8 1015.0 1017.3 1016.2 1016.2 1015.6 1023.1 1027.7 1019.4 1010.4 1009.8 DAY 16 12 12 2 1 3 30 1 2 16 17 3 MEAN QFF PRESSURE IN HPA 1028.2 1025.1 1022.0 1019.6 1017.2 1011.5 1009.1 1009.4 1021.9 1026.2 1025.9 1033.5 1020.8 MAX. QFF PRESSURE IN HPA 1040.5 1040.5 1031.1 1029.7 1026.3 1017.9 1017.2 1013.5 1028.1 1032.5 1035.5 1049.1 1049.1 DAY 19 18 1 5 18 29 1 15 23 11 9 7 MIN. QFF PRESSURE IN HPA 1014.8 1013.8 1008.9 1009.9 1010.5 1004.8 1002.3 1002.8 1012.7 1021.0 1018.1 1011.9 1002.3 DAY 16 1 7 30 5 16 30 1 2 14 17 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 860.0 857.4 857.8 859.6 859.1 856.6 855.9 856.5 864.5 865.6 861.9 862.7 859.8 MAX. QFE PRESSURE IN HPA 869.0 868.0 863.8 865.8 864.9 859.0 860.0 860.8 868.7 870.7 870.5 870.0 870.7 DAY 18 18 1 5 18 7 1 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 850.0 849.5 848.0 850.0 853.0 852.8 852.0 851.0 858.0 862.0 855.8 847.8 847.8 DAY 16 13 7 1 4 3 30 1 2 16 17 3 MEAN QNH PRESSURE IN HPA 1024.2 1021.3 1021.6 1023.8 1023.2 1020.3 1019.5 1020.2 1029.4 1030.7 1026.4 1027.3 1024.0 MAX. QNH PRESSURE IN HPA 1034.6 1033.4 1028.6 1030.9 1029.9 1023.1 1024.2 1025.1 1034.2 1036.5 1036.3 1035.7 1036.5 DAY 18 18 1 5 18 7 1 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1012.7 1012.1 1010.4 1012.7 1016.2 1015.9 1015.0 1013.8 1021.9 1026.5 1019.4 1010.2 1010.2 DAY 16 13 7 1 4 3 30 1 2 16 17 3 MEAN QFF PRESSURE IN HPA 1026.5 1023.5 1021.0 1019.1 1016.8 1010.9 1008.0 1008.5 1020.8 1025.3 1024.8 1032.5 1019.8 MAX. QFF PRESSURE IN HPA 1039.2 1039.3 1029.7 1028.4 1025.8 1018.0 1016.2 1012.3 1026.5 1032.1 1035.1 1046.8 1046.8 DAY 18 18 1 5 18 28 1 15 23 11 9 7 MIN. QFF PRESSURE IN HPA 1014.5 1012.8 1010.2 1009.0 1011.2 1005.6 1002.2 1001.2 1011.3 1019.8 1017.5 1011.8 1001.2 DAY 16 12 7 30 31 3 30 1 2 14 17 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.9 857.4 857.4 859.3 858.7 856.0 855.3 856.0 864.0 865.2 861.7 862.7 859.5 MAX. QFE PRESSURE IN HPA 869.0 868.0 863.2 865.0 864.2 858.8 859.7 860.0 868.2 870.0 870.0 870.0 870.0 DAY 18 18 1 5 17 7 1 14 23 11 2 7 MIN. QFE PRESSURE IN HPA 851.5 850.0 849.0 847.8 852.0 852.5 852.0 851.6 857.5 861.0 855.2 847.8 847.8 DAY 16 13 12 1 4 1 15 1 2 16 30 3 MEAN QNH PRESSURE IN HPA 1024.1 1021.3 1021.2 1023.4 1022.7 1019.7 1018.8 1019.6 1028.8 1030.2 1026.2 1027.3 1023.6 MAX. QNH PRESSURE IN HPA 1034.6 1033.4 1027.9 1030.0 1029.1 1022.8 1023.9 1024.2 1033.7 1035.7 1035.7 1035.7 1035.7 DAY 18 18 1 5 17 7 1 14 23 11 2 7 MIN. QNH PRESSURE IN HPA 1014.4 1012.7 1011.5 1010.2 1015.0 1015.6 1015.0 1014.5 1021.3 1025.4 1018.7 1010.2 1010.2 DAY 16 13 12 1 4 1 15 1 2 16 30 3 MEAN QFF PRESSURE IN HPA 1027.1 1024.0 1021.2 1019.5 1016.8 1010.6 1007.7 1008.6 1021.3 1026.1 1025.6 1033.2 1020.1 MAX. QFF PRESSURE IN HPA 1040.9 1039.4 1029.4 1028.2 1025.0 1019.1 1015.9 1012.6 1027.4 1032.8 1035.9 1047.8 1047.8 DAY 18 18 1 5 17 28 1 14 23 11 9 7 MIN. QFF PRESSURE IN HPA 1016.1 1014.4 1011.5 1006.7 1010.5 1006.0 1002.2 1003.6 1011.8 1020.4 1018.8 1013.3 1002.2 DAY 16 13 6 1 4 2 15 1 1 14 23 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 860.3 857.9 857.8 859.6 859.3 856.4 855.6 856.3 864.3 865.6 862.0 863.0 859.8 MAX. QFE PRESSURE IN HPA 870.0 868.5 864.0 865.0 865.0 859.0 859.7 860.5 868.5 870.2 869.9 870.0 870.2 DAY 18 18 1 4 17 7 1 14 23 10 2 7 MIN. QFE PRESSURE IN HPA 850.0 850.4 848.0 848.2 853.0 852.8 852.0 852.1 858.0 861.2 855.2 848.8 848.0 DAY 31 11 11 1 4 1 15 1 1 16 30 3 MEAN QNH PRESSURE IN HPA 1024.6 1021.8 1021.6 1023.7 1023.4 1020.1 1019.1 1020.0 1029.2 1030.6 1026.5 1027.6 1024.0 MAX. QNH PRESSURE IN HPA 1035.7 1034.0 1028.8 1030.0 1030.0 1023.1 1023.9 1024.8 1034.0 1036.0 1035.6 1035.7 1036.0 DAY 18 18 1 4 17 7 1 14 23 10 2 7 MIN. QNH PRESSURE IN HPA 1012.7 1013.2 1010.4 1010.6 1016.2 1015.9 1015.0 1015.1 1021.9 1025.6 1018.7 1011.3 1010.4 DAY 31 11 11 1 4 1 15 1 1 16 30 3 MEAN QFF PRESSURE IN HPA 1027.8 1024.8 1021.4 1019.4 1016.9 1010.7 1007.5 1008.3 1021.2 1025.8 1025.7 1033.7 1020.3 MAX. QFF PRESSURE IN HPA 1042.3 1040.9 1031.1 1028.4 1025.2 1019.6 1014.9 1012.8 1026.7 1031.9 1036.2 1047.6 1047.6 DAY 18 18 1 4 17 28 1 14 23 11 9 6 MIN. QFF PRESSURE IN HPA 1013.4 1014.7 1008.6 1008.4 1011.5 1005.6 1001.4 1003.0 1012.2 1020.0 1018.8 1014.7 1001.4 DAY 31 12 6 1 4 2 15 1 1 14 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 860.2 858.4 858.0 860.0 859.7 857.0 856.1 856.8 864.7 865.9 862.1 863.1 860.2 MAX. QFE PRESSURE IN HPA 870.0 868.5 864.0 865.3 865.6 859.8 860.0 861.2 868.9 870.6 870.0 870.0 870.6 DAY 18 18 1 4 17 28 1 14 23 10 1 6 MIN. QFE PRESSURE IN HPA 846.0 849.0 846.0 851.0 853.7 853.0 852.8 852.8 858.3 861.9 854.4 849.0 846.0 DAY 31 11 11 1 4 1 15 1 7 16 30 3 MEAN QNH PRESSURE IN HPA 1024.4 1022.4 1021.9 1024.2 1023.9 1020.7 1019.8 1020.6 1029.7 1031.0 1026.7 1027.8 1024.4 MAX. QNH PRESSURE IN HPA 1035.7 1034.0 1028.8 1030.3 1030.7 1024.0 1024.2 1025.6 1034.5 1036.4 1035.7 1035.7 1036.4 DAY 18 18 1 4 17 28 1 14 23 10 1 6 MIN. QNH PRESSURE IN HPA 1008.1 1011.5 1008.1 1013.8 1017.0 1016.2 1015.9 1015.9 1022.3 1026.4 1017.8 1011.5 1008.1 DAY 31 11 11 1 4 1 15 1 7 16 30 3 MEAN QFF PRESSURE IN HPA 1027.0 1024.8 1021.1 1019.2 1017.0 1011.1 1008.2 1008.7 1021.1 1025.4 1025.2 1033.3 1020.2 MAX. QFF PRESSURE IN HPA 1042.4 1040.8 1030.8 1027.5 1026.4 1020.2 1015.1 1012.4 1026.4 1031.4 1035.3 1048.4 1048.4 DAY 18 18 1 4 17 28 2 14 23 10 9 6 MIN. QFF PRESSURE IN HPA 1006.0 1011.5 1008.9 1011.1 1010.3 1005.7 1002.3 1003.0 1012.2 1018.6 1017.3 1015.2 1002.3 DAY 31 11 6 30 31 1 30 1 2 14 30 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.1 1.9 6.3 10.2 16.6 20.2 24.4 25.6 20.4 13.2 6.7 1.1 12.4 MINIMUN AIR TEMPERATURE (C) -1.2 -2.0 0.7 5.0 10.1 12.8 15.9 15.6 12.5 5.9 1.5 -3.1 6.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 0 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 7 8 0 0 0 0 0 0 0 0 7 12 34 DAYS WITH FREEZING MIN.<= 0 19 22 17 1 0 0 0 0 0 0 13 28 100 TEMPERATURE RECORDS LOWEST(C) -7.4 -8.4 -3.4 -1.0 4.6 9.6 12.0 12.0 5.6 2.6 -8.0 -9.8 -9.8 DAY 23 10 1 6 8 6 3 17 22 15 27 20 MAXIMUM AIR TEMPERATURE (C) 6.1 6.5 12.1 15.5 22.1 26.5 31.6 34.0 27.8 20.6 12.7 6.3 18.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 4 26 31 14 0 0 0 75 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 1 0 1 TEMPERATURE RECORDS HIGHEST(C) 11.0 11.6 16.8 20.0 27.4 31.4 34.8 37.2 34.6 28.2 19.0 11.6 37.2 DAY 31 28 22 29 25 20 26 5 3 2 21 30 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 8.5 11.4 10.5 12.0 13.7 15.7 18.4 15.3 14.7 11.2 9.4 12.4 MEAN DAILY TEMP. (MDT) (C) 2.5 2.3 6.4 10.3 16.1 19.7 23.8 24.8 20.2 13.2 7.1 1.6 12.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 9.2 87.7 117.6 32.1 0.0 0.0 0.0 246.6 HEATING DEG. DAYS(BASE 18 0C) 481.7 440.8 359.4 232.2 67.1 7.0 0.0 0.0 23.1 148.0 327.7 509.6 2596.6 DEWPOINT (MEAN C) -4.2 -3.8 -1.8 1.9 5.9 8.6 8.3 6.7 4.1 1.1 -2.4 -5.5 1.6 MIXING RATIO (G/KG) 3.33 3.46 4.02 5.28 6.96 8.34 8.44 7.63 6.16 4.87 3.96 3.03 5.46 VAPOUR PRESSURE (HPA) 4.59 4.75 5.51 7.22 9.53 11.35 11.43 10.37 8.42 6.70 5.43 4.17 7.46 SATURATION DEF. (HPA) 2.71 2.48 4.43 5.65 10.02 13.31 20.56 24.35 17.01 9.28 5.14 2.64 9.80 RELATIVE HUMIDITY (MEAN %) 65 68 60 60 52 51 39 34 39 47 56 65 53 RELATIVE HUMIDITY (MAX. %) 82 85 82 83 73 74 61 54 61 74 79 81 74 RELATIVE HUMIDITY (MIN. %) 48 48 38 39 34 32 23 17 21 27 35 43 34 RELATIVE HUMIDITY (MEAN% 03UTC) 72 80 77 76 70 69 59 53 58 69 73 76 69 RELATIVE HUMIDITY (MEAN% 09UTC) 60 58 47 50 39 38 32 26 29 34 43 54 43 RELATIVE HUMIDITY (MEAN% 15UTC) 60 59 48 50 39 39 24 22 28 34 47 56 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 28.0 69.4 68.2 156.7 32.4 19.9 0.0 0.0 8.0 1.4 71.4 10.9 466.3 DAYS WITH PRECIPITATION >=10 1 3 2 5 1 0 0 0 0 0 1 0 13 DAYS WITH PRECIPITATION >= 5 1 5 2 9 2 2 0 0 1 0 5 0 27 DAYS WITH PRECIPITATION >= 1 5 8 9 11 7 4 0 0 2 1 8 4 59 DAYS WITH PRECIPITATION 10 10 9 14 9 6 0 0 3 2 8 5 76 GREATEST DAILY PRECIPITATION 18.0 22.0 26.0 35.0 12.0 8.0 0.0 0.0 6.0 1.4 30.0 4.6 35.0 DAY 16 5 17 4 4 22 ** ** 20 3 3 12 DAY WITH THUNDER STORM 0 0 3 3 6 6 0 0 1 0 1 0 20 DAYS WITH SNOW OR SLEET 3 6 4 0 0 0 0 0 0 0 2 5 20 DAYS WITH DUST 0 1 0 0 0 1 0 0 0 1 0 0 3 WIND DIRECTION (PREVAILING) 180 225 225 180 225 225 225 225 225 225 180 180 180 PREVAILING WIND SPEED(KNOTS) 9.7 9.8 9.5 7.8 10.4 9.5 7.7 10.2 9.6 10.1 7.4 9.6 8.4 PREVAILING WIND PERCENT 19.0 5.8 15.3 15.4 8.1 6.3 5.6 8.9 10.0 10.1 18.3 7.3 9.3 CALMS PERCENT OF WIND 59.3 85.3 59.3 55.0 66.9 77.1 71.0 76.6 70.0 71.8 63.8 76.6 69.3 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 199 213 209 211 217 222 240 230 221 231 205 201 212 VECTOR WIND MAGNITUDE(KNOTS) 3.4 0.9 2.7 2.5 1.2 0.7 0.4 1.4 1.6 1.2 2.5 1.0 1.6 WIND STEADINESES (MEAN %) 77.3 60.0 71.1 61.0 41.4 43.8 21.1 70.0 64.0 48.0 80.6 52.6 59.3 WIND SPEED (MEAN KNOTS) 4.4 1.5 3.8 4.1 2.9 1.6 1.9 2.0 2.5 2.5 3.1 1.9 2.7 FASTEST WIND DIRECTION 240 270 230 270 190 240 260 190 240 210 220 210 270 FASTEST WIND SPEED (KNOTS) 19 29 23 25 19 19 16 16 17 23 19 17 29 DAY 19 4 25 3 2 29 1 5 16 3 9 22 DAYS WITH SKY CLEAR (0-2)/8 11 13 13 7 11 19 30 31 23 25 19 20 222 DAYS WITH P.CLOUDY (3-6)/8 13 8 13 14 17 9 1 0 7 5 8 4 99 DAYS WITH CLOUDY (7-8)/8 7 7 5 9 3 2 0 0 0 1 3 7 44 DAYS WITH VISIBILITY =< 2 KM 3 1 0 0 0 1 0 0 0 0 1 0 6 DURATION OF SUNSHINE HOURS 143.7 155.0 224.0 ****** ****** 205.7 379.0 368.9 292.1 258.0 222.8 173.8 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 862.6 859.7 858.7 858.1 861.0 858.1 854.7 857.2 858.9 861.9 859.9 860.5 859.3 MAX. QFE PRESSURE IN HPA 870.0 867.0 868.0 863.5 865.9 861.9 858.5 861.5 865.0 870.0 867.0 868.2 870.0 DAY-HOUR 7- 6 13- 9 3- 9 7- 6 22- 9 2- 6 4- 6 20- 6 13- 6 25- 9 15- 9 10- 9 MIN. QFE PRESSURE IN HPA 852.8 849.0 849.9 850.0 853.0 852.0 850.9 853.0 852.0 856.0 852.0 854.2 849.0 DAY-HOUR 16-21 5- 3 16-18 19- 9 2- 6 29- 9 16-15 3-15 19-15 11-15 23-21 25-12 MEAN QNH PRESSURE IN HPA 1027.2 1023.9 1022.8 1022.0 1025.3 1022.0 1018.0 1021.0 1023.0 1026.4 1024.1 1024.7 1023.4 MAX. QNH PRESSURE IN HPA 1035.7 1032.3 1033.4 1028.3 1031.0 1026.4 1022.5 1026.0 1030.0 1035.7 1032.3 1033.7 1035.7 DAY-HOUR 7- 6 13- 9 3- 9 7- 6 22- 9 2- 6 4- 6 20- 6 13- 6 25- 9 15- 9 10- 9 MIN. QNH PRESSURE IN HPA 1015.9 1011.5 1012.6 1012.7 1016.2 1015.0 1013.7 1016.2 1015.0 1019.6 1015.0 1017.5 1011.5 DAY-HOUR 16-21 5- 3 16-18 19- 9 2- 6 29- 9 16-15 3-15 19-15 11-15 23-21 25-12 MEAN QFF PRESSURE IN HPA 1029.6 1026.3 1022.3 1019.0 1018.4 1012.8 1006.4 1008.8 1013.9 1021.7 1023.4 1027.8 1019.2 MAX. QFF PRESSURE IN HPA 1038.5 1035.2 1034.9 1027.7 1024.2 1020.3 1011.8 1014.6 1024.8 1031.9 1033.8 1037.3 1038.5 DAY-HOUR 7- 6 12- 6 3- 6 6- 6 13- 3 1- 3 4- 6 24- 9 22- 3 26- 3 27- 3 10- 9 MIN. QFF PRESSURE IN HPA 1018.2 1013.7 1010.1 1009.4 1009.0 1001.4 1000.8 1003.3 1005.4 1010.8 1011.3 1019.2 1000.8 DAY-HOUR 16-18 5- 6 25- 3 19- 9 2- 9 29-12 21-18 3-21 19-12 3-12 23-21 25-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 862.5 859.8 858.8 858.2 861.0 858.3 854.7 857.2 859.0 862.1 859.9 860.6 859.3 MAX. QFE PRESSURE IN HPA 869.9 865.0 867.0 863.0 864.4 861.5 858.0 860.0 864.0 868.9 867.0 867.2 869.9 DAY 7 1 3 7 22 1 4 20 13 25 16 10 MIN. QFE PRESSURE IN HPA 854.5 850.0 850.5 851.9 855.0 852.0 852.0 854.4 852.5 857.0 852.4 855.1 850.0 DAY 17 5 17 19 6 30 17 4 20 11 24 16 MEAN QNH PRESSURE IN HPA 1027.1 1024.0 1022.8 1022.1 1025.4 1022.2 1018.1 1021.0 1023.1 1026.7 1024.1 1024.9 1023.5 MAX. QNH PRESSURE IN HPA 1035.6 1030.0 1032.3 1027.7 1029.3 1026.0 1021.9 1024.2 1028.8 1034.5 1032.3 1032.5 1035.6 DAY 7 1 3 7 22 1 4 20 13 25 16 10 MIN. QNH PRESSURE IN HPA 1017.9 1012.7 1013.3 1014.9 1018.5 1015.0 1015.0 1017.8 1015.6 1020.8 1015.5 1018.6 1012.7 DAY 17 5 17 19 6 30 17 4 20 11 24 16 MEAN QFF PRESSURE IN HPA 1029.2 1026.0 1021.9 1018.7 1018.4 1013.0 1006.5 1008.7 1013.6 1021.4 1022.8 1027.4 1019.0 MAX. QFF PRESSURE IN HPA 1037.1 1033.2 1032.9 1026.5 1022.6 1018.2 1011.0 1013.4 1024.6 1030.8 1032.3 1035.9 1037.1 DAY 7 12 3 7 13 3 4 25 22 27 27 10 MIN. QFF PRESSURE IN HPA 1018.8 1014.1 1013.2 1009.8 1011.3 1002.5 1002.5 1004.1 1005.9 1011.9 1012.5 1019.3 1002.5 DAY 11 5 25 19 6 29 22 4 4 11 24 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 862.4 859.5 858.6 858.1 861.0 858.3 855.0 857.4 859.1 862.0 859.7 860.3 859.3 MAX. QFE PRESSURE IN HPA 869.5 865.0 867.0 863.2 864.9 861.5 858.0 861.0 864.0 868.9 866.2 867.0 869.5 DAY 7 1 3 7 22 1 4 20 13 25 16 10 MIN. QFE PRESSURE IN HPA 855.5 849.0 850.2 851.0 854.0 852.5 852.5 855.0 852.5 856.5 852.4 855.0 849.0 DAY 11 5 17 19 2 30 16 3 20 11 24 4 MEAN QNH PRESSURE IN HPA 1027.0 1023.7 1022.6 1022.0 1025.3 1022.3 1018.5 1021.2 1023.1 1026.6 1023.8 1024.6 1023.4 MAX. QNH PRESSURE IN HPA 1035.2 1030.0 1032.3 1027.9 1029.9 1026.0 1021.9 1025.4 1028.8 1034.5 1031.4 1032.3 1035.2 DAY 7 1 3 7 22 1 4 20 13 25 16 10 MIN. QNH PRESSURE IN HPA 1019.0 1011.5 1012.9 1013.8 1017.3 1015.6 1015.6 1018.5 1015.6 1020.2 1015.5 1018.5 1011.5 DAY 11 5 17 19 2 30 16 3 20 11 24 4 MEAN QFF PRESSURE IN HPA 1029.8 1026.4 1022.7 1019.6 1018.9 1013.7 1007.2 1010.1 1014.8 1022.6 1023.8 1028.2 1019.8 MAX. QFF PRESSURE IN HPA 1037.6 1033.8 1033.7 1027.1 1024.2 1020.3 1011.6 1014.3 1024.8 1031.9 1033.8 1035.9 1037.6 DAY 7 12 3 6 13 1 4 25 22 26 27 10 MIN. QFF PRESSURE IN HPA 1019.3 1013.9 1010.1 1010.6 1011.1 1003.7 1003.4 1006.1 1007.2 1012.4 1013.2 1020.3 1003.4 DAY 11 5 25 19 2 29 21 4 4 11 11 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 862.8 859.9 859.1 858.5 861.3 858.6 855.6 858.1 859.7 862.6 860.2 861.1 859.8 MAX. QFE PRESSURE IN HPA 870.0 866.0 867.8 863.5 865.4 861.9 858.5 861.5 865.0 869.9 866.8 867.7 870.0 DAY 7 1 3 7 23 2 4 20 13 25 15 10 MIN. QFE PRESSURE IN HPA 855.8 849.0 850.8 850.4 853.0 852.9 852.8 855.4 854.0 856.9 852.8 855.6 849.0 DAY 11 5 17 19 2 29 16 3 19 11 11 4 MEAN QNH PRESSURE IN HPA 1027.5 1024.1 1023.1 1022.4 1025.8 1022.6 1019.1 1022.1 1023.9 1027.2 1024.5 1025.5 1024.0 MAX. QNH PRESSURE IN HPA 1035.7 1031.1 1033.2 1028.3 1030.4 1026.4 1022.5 1026.0 1030.0 1035.6 1032.1 1033.1 1035.7 DAY 7 1 3 7 23 2 4 20 13 25 15 10 MIN. QNH PRESSURE IN HPA 1019.4 1011.5 1013.6 1013.2 1016.2 1016.0 1015.9 1018.9 1017.3 1020.6 1015.9 1019.2 1011.5 DAY 11 5 17 19 2 29 16 3 19 11 11 4 MEAN QFF PRESSURE IN HPA 1030.3 1026.9 1023.2 1019.6 1018.8 1013.4 1007.2 1009.6 1014.8 1022.7 1024.3 1029.3 1020.0 MAX. QFF PRESSURE IN HPA 1038.5 1035.2 1034.9 1027.7 1023.2 1019.4 1011.8 1014.0 1023.0 1031.8 1033.3 1037.1 1038.5 DAY 7 12 3 6 13 2 4 20 22 26 27 10 MIN. QFF PRESSURE IN HPA 1019.5 1013.7 1012.0 1009.8 1009.1 1003.2 1003.3 1005.8 1007.1 1011.7 1014.0 1022.5 1003.2 DAY 11 5 25 19 2 29 16 6 19 3 11 31 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 863.2 860.4 859.4 858.6 861.5 858.6 855.4 857.9 859.4 862.6 860.4 861.0 859.9 MAX. QFE PRESSURE IN HPA 870.0 867.0 868.0 863.3 865.9 861.7 858.0 861.0 865.0 870.0 867.0 868.2 870.0 DAY 7 13 3 7 22 1 4 20 13 25 15 10 MIN. QFE PRESSURE IN HPA 856.2 850.0 851.7 850.0 853.5 852.0 852.0 855.2 853.5 857.0 853.7 855.9 850.0 DAY 11 5 17 19 2 29 16 3 19 3 25 16 MEAN QNH PRESSURE IN HPA 1027.9 1024.6 1023.5 1022.6 1025.9 1022.6 1018.9 1021.9 1023.6 1027.2 1024.7 1025.4 1024.1 MAX. QNH PRESSURE IN HPA 1035.7 1032.3 1033.4 1028.0 1031.0 1026.2 1021.9 1025.4 1030.0 1035.7 1032.3 1033.7 1035.7 DAY 7 13 3 7 22 1 4 20 13 25 15 10 MIN. QNH PRESSURE IN HPA 1019.8 1012.7 1014.7 1012.7 1016.7 1015.0 1015.0 1018.7 1016.7 1020.8 1017.0 1019.5 1012.7 DAY 11 5 17 19 2 29 16 3 19 3 25 16 MEAN QFF PRESSURE IN HPA 1030.2 1026.7 1022.6 1019.2 1018.7 1013.1 1007.1 1009.2 1014.1 1022.0 1023.5 1027.9 1019.5 MAX. QFF PRESSURE IN HPA 1038.2 1035.0 1033.7 1027.4 1023.2 1019.2 1011.1 1014.6 1022.5 1031.6 1032.3 1037.3 1038.2 DAY 7 13 3 6 13 2 4 24 21 25 15 10 MIN. QFF PRESSURE IN HPA 1020.1 1014.9 1013.3 1009.4 1009.0 1002.3 1002.9 1004.2 1005.7 1010.9 1014.3 1020.3 1002.3 DAY 11 5 25 19 2 29 16 6 4 3 23 26 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 862.4 859.7 858.7 857.9 860.9 858.0 854.4 856.8 858.4 861.3 859.4 859.6 859.0 MAX. QFE PRESSURE IN HPA 869.0 866.2 866.5 862.2 865.0 861.2 857.0 860.0 863.0 868.6 866.5 867.0 869.0 DAY 7 1 3 6 22 1 3 24 13 25 15 10 MIN. QFE PRESSURE IN HPA 855.0 850.3 851.8 850.8 854.0 852.0 851.0 854.0 852.4 856.3 853.9 854.2 850.3 DAY 11 5 25 19 2 29 16 3 19 3 25 25 MEAN QNH PRESSURE IN HPA 1027.0 1023.8 1022.7 1021.9 1025.3 1021.9 1017.8 1020.5 1022.4 1025.7 1023.6 1023.8 1023.0 MAX. QNH PRESSURE IN HPA 1034.6 1031.4 1031.7 1026.8 1030.0 1025.6 1020.8 1024.2 1027.7 1034.1 1031.7 1032.3 1034.6 DAY 7 1 3 6 22 1 3 24 13 25 15 10 MIN. QNH PRESSURE IN HPA 1018.5 1013.0 1014.8 1013.6 1017.3 1015.0 1013.8 1017.3 1015.5 1020.0 1017.2 1017.5 1013.0 DAY 11 5 25 19 2 29 16 3 19 3 25 25 MEAN QFF PRESSURE IN HPA 1029.0 1025.8 1021.8 1018.5 1018.3 1012.7 1006.1 1008.2 1013.1 1020.5 1022.4 1026.2 1018.5 MAX. QFF PRESSURE IN HPA 1037.2 1033.1 1031.9 1025.7 1022.6 1019.3 1010.7 1013.1 1022.3 1029.5 1031.3 1035.5 1037.2 DAY 7 12 3 6 13 2 3 24 21 25 15 10 MIN. QFF PRESSURE IN HPA 1018.4 1015.4 1013.4 1010.3 1010.8 1001.4 1002.2 1004.3 1005.4 1010.8 1013.0 1019.5 1001.4 DAY 11 5 16 19 2 29 16 3 19 3 23 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 862.2 859.3 858.2 857.6 860.3 857.4 853.7 856.3 858.0 861.2 859.5 859.9 858.6 MAX. QFE PRESSURE IN HPA 868.8 865.7 865.2 861.6 864.5 860.0 856.7 859.0 862.7 868.5 866.2 866.8 868.8 DAY 6 1 3 6 22 1 3 24 13 26 15 9 MIN. QFE PRESSURE IN HPA 855.2 851.0 850.2 852.0 854.5 852.0 850.9 853.0 852.0 856.0 854.0 854.8 850.2 DAY 11 5 16 19 2 29 16 3 19 11 23 15 MEAN QNH PRESSURE IN HPA 1026.7 1023.4 1022.1 1021.5 1024.5 1021.2 1017.0 1019.9 1022.0 1025.6 1023.6 1024.2 1022.6 MAX. QNH PRESSURE IN HPA 1034.4 1030.8 1030.2 1026.1 1029.4 1024.2 1020.4 1023.1 1027.3 1034.0 1031.4 1032.1 1034.4 DAY 6 1 3 6 22 1 3 24 13 26 15 9 MIN. QNH PRESSURE IN HPA 1018.7 1013.8 1012.9 1015.0 1017.9 1015.0 1013.7 1016.2 1015.0 1019.6 1017.3 1018.2 1012.9 DAY 11 5 16 19 2 29 16 3 19 11 23 15 MEAN QFF PRESSURE IN HPA 1029.4 1026.1 1022.1 1019.0 1018.1 1012.6 1005.8 1008.7 1013.8 1021.7 1023.7 1027.7 1019.1 MAX. QFF PRESSURE IN HPA 1036.6 1033.0 1031.0 1025.7 1022.4 1018.0 1010.8 1013.1 1022.8 1031.6 1033.0 1035.4 1036.6 DAY 6 12 3 6 13 3 3 24 21 26 15 10 MIN. QFF PRESSURE IN HPA 1019.4 1016.2 1011.5 1012.3 1011.1 1003.6 1001.5 1004.4 1006.4 1012.4 1013.9 1020.8 1001.5 DAY 11 5 16 19 2 29 21 3 19 11 23 26 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 862.4 859.6 858.5 857.9 860.6 857.6 853.9 856.7 858.6 861.7 859.9 860.5 859.0 MAX. QFE PRESSURE IN HPA 869.2 865.7 865.5 862.0 864.9 860.5 857.0 859.0 863.0 868.5 866.9 867.4 869.2 DAY 6 1 2 6 19 1 3 24 12 25 15 9 MIN. QFE PRESSURE IN HPA 853.5 852.2 849.9 853.8 855.2 852.0 851.0 853.5 852.5 856.4 853.0 855.0 849.9 DAY 16 5 16 19 2 29 16 3 19 11 23 15 MEAN QNH PRESSURE IN HPA 1026.9 1023.7 1022.4 1021.8 1025.0 1021.4 1017.2 1020.4 1022.6 1026.2 1024.1 1024.8 1023.1 MAX. QNH PRESSURE IN HPA 1034.8 1030.8 1030.6 1026.5 1029.9 1024.8 1020.8 1023.1 1027.7 1034.0 1032.2 1032.7 1034.8 DAY 6 1 2 6 19 1 3 24 12 25 15 9 MIN. QNH PRESSURE IN HPA 1016.7 1015.2 1012.6 1017.1 1018.7 1015.0 1013.8 1016.7 1015.6 1020.1 1016.2 1018.5 1012.6 DAY 16 5 16 19 2 29 16 3 19 11 23 15 MEAN QFF PRESSURE IN HPA 1029.7 1026.6 1022.4 1018.9 1018.0 1012.1 1005.4 1008.0 1013.7 1021.7 1024.0 1028.6 1019.1 MAX. QFF PRESSURE IN HPA 1037.5 1033.7 1031.6 1025.8 1023.3 1017.9 1010.4 1011.8 1023.2 1031.0 1033.6 1036.4 1037.5 DAY 6 11 2 6 19 3 3 24 21 25 15 9 MIN. QFF PRESSURE IN HPA 1018.2 1017.7 1010.5 1013.6 1011.1 1003.6 1000.8 1003.9 1006.1 1013.5 1011.8 1022.4 1000.8 DAY 16 5 16 18 2 29 21 3 19 11 23 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 862.6 859.8 858.8 858.2 861.1 858.0 854.6 857.3 859.1 862.1 860.0 860.7 859.4 MAX. QFE PRESSURE IN HPA 869.9 865.5 866.0 862.8 864.4 861.2 858.0 860.0 864.0 868.8 867.0 867.5 869.9 DAY 6 1 2 6 25 1 3 24 21 25 15 9 MIN. QFE PRESSURE IN HPA 852.8 852.0 850.4 852.9 855.5 852.0 852.0 853.7 852.5 857.0 852.0 855.0 850.4 DAY 16 4 16 18 4 29 16 3 19 10 23 15 MEAN QNH PRESSURE IN HPA 1027.2 1023.9 1022.9 1022.2 1025.5 1021.9 1018.0 1021.1 1023.2 1026.6 1024.2 1025.0 1023.5 MAX. QNH PRESSURE IN HPA 1035.6 1030.6 1031.1 1027.4 1029.3 1025.6 1021.9 1024.2 1028.8 1034.4 1032.3 1032.9 1035.6 DAY 6 1 2 6 25 1 3 24 21 25 15 9 MIN. QNH PRESSURE IN HPA 1015.9 1015.0 1013.2 1016.0 1019.0 1015.0 1015.0 1017.0 1015.6 1020.8 1015.0 1018.5 1013.2 DAY 16 4 16 18 4 29 16 3 19 10 23 15 MEAN QFF PRESSURE IN HPA 1029.5 1026.0 1021.8 1018.7 1018.2 1012.3 1006.2 1008.5 1013.8 1021.5 1023.1 1027.5 1018.9 MAX. QFF PRESSURE IN HPA 1037.4 1033.4 1031.8 1026.6 1022.9 1018.4 1011.5 1013.8 1024.3 1030.9 1032.2 1036.3 1037.4 DAY 6 13 2 6 13 1 3 24 21 25 26 9 MIN. QFF PRESSURE IN HPA 1018.4 1014.4 1012.0 1011.1 1011.6 1003.2 1001.4 1003.3 1005.9 1012.2 1011.3 1019.2 1001.4 DAY 16 4 16 18 5 28 21 3 3 10 23 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.5 2.9 4.0 9.7 17.6 20.9 25.9 25.7 21.6 13.7 7.0 5.7 12.7 MINIMUN AIR TEMPERATURE (C) -5.6 -0.7 0.4 5.1 11.2 13.1 18.0 16.7 13.7 7.9 1.0 2.3 6.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 19 6 0 0 0 0 0 0 0 0 0 0 25 DAYS WITH FREEZING MIN.<= 0 28 13 16 0 0 0 0 0 0 2 12 9 80 TEMPERATURE RECORDS LOWEST(C) -15.4 -10.0 -3.0 0.6 7.0 7.4 14.0 13.0 9.0 -0.4 -3.8 -2.6 -15.4 DAY 22 3 17 15 1 7 1 24 23 31 13 19 MAXIMUM AIR TEMPERATURE (C) 0.9 7.6 8.2 14.9 23.2 27.3 32.7 33.1 28.4 20.0 13.9 10.0 18.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 4 26 29 10 0 0 0 69 DAYS WITH MAXIMUM TEMP. <= 0 13 2 0 0 0 0 0 0 0 0 0 0 15 TEMPERATURE RECORDS HIGHEST(C) 11.2 14.0 15.0 23.0 28.4 35.6 36.0 36.4 33.4 28.4 18.0 14.4 36.4 DAY 1 25 30 30 27 30 21 1 2 3 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 6.5 8.3 7.8 9.8 12.0 14.2 14.7 16.4 14.7 12.1 12.9 7.7 11.5 MEAN DAILY TEMP. (MDT) (C) -2.3 3.4 4.3 10.0 17.2 20.2 25.3 24.9 21.0 14.0 7.4 6.1 12.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 4.0 14.4 134.6 120.6 26.5 0.0 0.0 0.0 300.1 HEATING DEG. DAYS(BASE 18 0C) 630.3 422.6 423.9 239.1 46.9 4.7 0.0 0.0 4.2 129.5 316.6 367.7 2585.5 DEWPOINT (MEAN C) -6.5 -3.7 -1.7 0.6 5.5 5.1 8.8 5.1 4.4 3.2 -1.8 -1.0 1.5 MIXING RATIO (G/KG) 2.90 3.51 4.04 4.81 6.80 6.73 8.66 6.71 6.30 5.85 4.06 4.26 5.38 VAPOUR PRESSURE (HPA) 3.98 4.79 5.49 6.56 9.25 9.12 11.70 9.10 8.55 7.98 5.58 5.83 7.33 SATURATION DEF. (HPA) 1.36 3.02 2.84 5.95 11.73 16.60 22.98 25.42 18.37 8.68 4.84 3.48 10.44 RELATIVE HUMIDITY (MEAN %) 75 65 69 57 50 39 37 30 36 53 57 65 53 RELATIVE HUMIDITY (MAX. %) 86 82 87 79 73 62 56 48 55 75 79 82 72 RELATIVE HUMIDITY (MIN. %) 62 45 49 35 31 24 22 16 21 34 33 46 35 RELATIVE HUMIDITY (MEAN% 03UTC) 79 76 76 69 69 57 53 46 52 69 77 74 66 RELATIVE HUMIDITY (MEAN% 09UTC) 69 58 61 48 39 31 30 22 26 44 47 61 45 RELATIVE HUMIDITY (MEAN% 15UTC) 73 61 63 47 37 26 26 19 27 44 44 60 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 138.2 54.3 74.7 134.7 30.3 1.0 0.7 0.1 1.9 26.4 19.5 86.8 568.6 DAYS WITH PRECIPITATION >=10 5 2 3 4 1 0 0 0 0 0 1 4 20 DAYS WITH PRECIPITATION >= 5 9 4 6 7 2 0 0 0 0 3 2 4 37 DAYS WITH PRECIPITATION >= 1 13 8 14 10 6 1 0 0 1 7 2 9 71 DAYS WITH PRECIPITATION 15 11 15 13 9 2 2 2 2 11 3 15 100 GREATEST DAILY PRECIPITATION 24.0 17.0 15.0 45.0 10.0 1.0 0.7 0.1 1.1 6.0 11.0 24.0 45.0 DAY 7 1 23 12 8 1 8 29 21 15 6 10 DAY WITH THUNDER STORM 2 2 1 5 4 0 2 1 0 2 0 0 19 DAYS WITH SNOW OR SLEET 14 6 13 1 0 0 0 0 0 0 0 2 36 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 180 225 180 360 225 225 225 225 180 180 PREVAILING WIND SPEED(KNOTS) 9.0 9.3 9.3 9.2 11.4 9.3 7.3 9.9 11.5 11.8 10.0 10.1 9.3 PREVAILING WIND PERCENT 8.5 9.9 19.4 24.6 8.5 10.0 12.5 12.9 25.0 13.7 4.6 17.3 10.7 CALMS PERCENT OF WIND 78.6 65.1 56.0 47.9 68.5 60.8 71.8 62.9 50.0 60.1 85.4 50.8 63.2 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 171 203 186 213 238 246 360 257 226 218 209 193 216 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.8 2.3 2.8 1.7 1.3 1.3 1.4 4.4 2.6 0.6 3.7 1.7 WIND STEADINESES (MEAN %) 52.9 58.1 60.5 57.1 54.8 36.1 59.1 41.2 80.0 61.9 50.0 69.8 48.6 WIND SPEED (MEAN KNOTS) 1.7 3.1 3.8 4.9 3.1 3.6 2.2 3.4 5.5 4.2 1.2 5.3 3.5 FASTEST WIND DIRECTION 240 150 240 220 240 280 60 250 190 210 240 240 220 FASTEST WIND SPEED (KNOTS) 17 19 17 23 23 19 16 21 23 23 16 21 23 DAY 30 6 2 11 17 4 8 19 7 22 3 26 DAYS WITH SKY CLEAR (0-2)/8 3 2 4 4 13 22 24 31 27 15 20 6 171 DAYS WITH P.CLOUDY (3-6)/8 13 18 13 17 13 8 7 0 3 14 6 15 127 DAYS WITH CLOUDY (7-8)/8 15 9 14 9 5 0 0 0 0 2 4 10 68 DAYS WITH VISIBILITY =< 2 KM 7 0 0 0 0 0 0 0 0 0 0 1 8 DURATION OF SUNSHINE HOURS 83.2 126.4 134.5 196.6 277.8 354.6 341.0 358.8 309.3 239.4 212.5 117.2 2751.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 857.0 854.4 852.3 854.4 855.4 853.2 853.1 852.9 854.2 857.6 861.1 858.2 855.3 MAX. QFE PRESSURE IN HPA 865.3 860.8 858.7 862.3 860.5 859.5 859.6 860.8 861.1 864.7 869.7 863.7 869.7 DAY-HOUR 26- 6 13- 6 29- 6 4- 6 3-21 12- 6 3- 6 29- 6 26- 6 2- 6 18- 6 4- 6 MIN. QFE PRESSURE IN HPA 848.0 843.6 843.9 841.8 849.8 847.7 846.2 847.2 846.7 850.5 854.4 851.7 841.8 DAY-HOUR 6-12 1-18 7-12 12-21 28-15 18-15 6-15 7-15 21-21 26-15 6-12 29-12 MEAN QNH PRESSURE IN HPA 1020.7 1017.8 1015.3 1017.8 1019.0 1016.4 1016.3 1016.0 1017.5 1021.5 1025.5 1022.1 1018.8 MAX. QNH PRESSURE IN HPA 1030.3 1025.1 1022.7 1026.9 1024.8 1023.6 1023.8 1025.1 1025.5 1029.6 1035.4 1028.5 1035.4 DAY-HOUR 26- 6 13- 6 29- 6 4- 6 3-21 12- 6 3- 6 29- 6 26- 6 2- 6 18- 6 4- 6 MIN. QNH PRESSURE IN HPA 1010.4 1005.3 1005.7 1003.2 1012.5 1010.0 1008.3 1009.5 1008.9 1013.3 1017.8 1014.7 1003.2 DAY-HOUR 6-12 1-18 7-12 12-21 28-15 18-15 6-15 7-15 21-21 26-15 6-12 29-12 MEAN QFF PRESSURE IN HPA 1026.0 1019.4 1016.1 1015.0 1011.3 1006.8 1003.8 1003.8 1007.6 1016.2 1024.7 1022.0 1014.4 MAX. QFF PRESSURE IN HPA 1037.8 1030.9 1024.0 1028.2 1017.7 1017.1 1011.2 1014.3 1016.8 1027.1 1038.4 1029.4 1038.4 DAY-HOUR 26- 3 3- 9 28-18 4- 6 18- 3 12- 6 3- 6 29- 6 30-21 19- 6 18- 6 4- 6 MIN. QFF PRESSURE IN HPA 1012.6 1006.1 1007.0 999.6 1001.4 998.2 996.8 996.5 999.3 1005.9 1014.0 1014.1 996.5 DAY-HOUR 6- 6 1-18 7-12 12-21 24-21 19- 0 6-15 7-21 21-21 5-12 2-12 29-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 856.9 854.2 852.0 854.3 855.5 853.2 853.3 853.0 854.2 857.6 861.3 858.2 855.3 MAX. QFE PRESSURE IN HPA 865.0 859.9 858.0 861.6 859.7 859.0 857.8 858.9 860.1 864.2 868.8 862.0 868.8 DAY 26 24 29 4 18 12 4 29 26 19 18 4 MIN. QFE PRESSURE IN HPA 849.7 845.3 846.5 842.1 850.0 848.3 848.3 848.2 847.0 850.7 856.5 852.8 842.1 DAY 6 2 2 13 25 19 7 8 22 27 2 14 MEAN QNH PRESSURE IN HPA 1020.6 1017.5 1015.0 1017.6 1019.0 1016.4 1016.5 1016.1 1017.5 1021.4 1025.7 1022.2 1018.8 MAX. QNH PRESSURE IN HPA 1030.0 1024.1 1021.9 1026.1 1023.9 1023.1 1021.7 1023.0 1024.3 1029.1 1034.4 1026.5 1034.4 DAY 26 24 29 4 18 12 4 29 26 19 18 4 MIN. QNH PRESSURE IN HPA 1012.3 1007.3 1008.7 1003.6 1012.7 1010.7 1010.7 1010.6 1009.2 1013.5 1020.2 1015.9 1003.6 DAY 6 2 2 13 25 19 7 8 22 27 2 14 MEAN QFF PRESSURE IN HPA 1025.5 1018.7 1015.6 1014.7 1011.3 1006.7 1003.9 1003.5 1007.2 1015.6 1024.2 1021.6 1014.0 MAX. QFF PRESSURE IN HPA 1037.0 1028.8 1021.9 1027.0 1017.2 1015.2 1010.4 1011.9 1014.2 1026.0 1035.7 1026.1 1037.0 DAY 26 4 29 4 18 12 9 30 25 19 18 4 MIN. QFF PRESSURE IN HPA 1013.3 1008.5 1008.0 1000.6 1001.5 998.2 997.8 997.8 999.4 1008.5 1015.8 1016.0 997.8 DAY 6 2 25 13 25 19 29 8 8 6 2 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 856.6 854.3 852.1 854.5 855.7 853.8 854.0 853.6 854.5 857.9 861.3 858.1 855.5 MAX. QFE PRESSURE IN HPA 865.0 859.9 858.1 861.6 859.9 859.0 859.1 859.8 860.4 864.5 868.8 862.4 868.8 DAY 26 24 29 4 18 12 3 29 26 2 18 4 MIN. QFE PRESSURE IN HPA 849.1 847.6 844.7 844.8 850.4 848.8 849.2 848.7 848.0 851.4 856.5 852.7 844.7 DAY 6 9 2 13 25 19 7 8 22 27 2 14 MEAN QNH PRESSURE IN HPA 1020.3 1017.6 1015.1 1017.9 1019.3 1017.1 1017.4 1016.8 1017.9 1021.8 1025.7 1022.0 1019.1 MAX. QNH PRESSURE IN HPA 1030.0 1024.1 1022.0 1026.1 1024.1 1023.1 1023.2 1024.0 1024.7 1029.4 1034.4 1027.0 1034.4 DAY 26 24 29 4 18 12 3 29 26 2 18 4 MIN. QNH PRESSURE IN HPA 1011.7 1009.9 1006.6 1006.7 1013.2 1011.3 1011.8 1011.2 1010.4 1014.3 1020.2 1015.8 1006.6 DAY 6 9 2 13 25 19 7 8 22 27 2 14 MEAN QFF PRESSURE IN HPA 1025.7 1019.6 1016.2 1015.7 1012.1 1008.1 1005.3 1005.4 1008.9 1017.1 1025.5 1022.2 1015.2 MAX. QFF PRESSURE IN HPA 1037.8 1029.0 1022.8 1027.6 1017.7 1016.3 1010.6 1013.2 1015.8 1027.0 1036.9 1027.5 1037.8 DAY 26 4 29 4 18 12 3 29 25 19 18 4 MIN. QFF PRESSURE IN HPA 1013.1 1009.1 1008.9 1003.6 1002.3 1000.8 999.2 999.5 1000.5 1010.3 1017.0 1016.1 999.2 DAY 6 9 2 13 25 19 29 8 8 13 6 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 857.5 855.2 853.1 855.3 856.3 854.1 854.4 854.1 855.2 858.7 862.2 859.0 856.3 MAX. QFE PRESSURE IN HPA 865.3 860.8 858.7 862.3 859.4 859.5 859.6 860.8 861.1 864.7 869.7 863.7 869.7 DAY 26 13 29 4 7 12 3 29 26 2 18 4 MIN. QFE PRESSURE IN HPA 848.7 847.6 847.0 847.0 851.4 849.0 849.7 849.5 849.8 852.6 856.5 852.9 847.0 DAY 6 9 2 13 25 19 7 8 21 27 6 14 MEAN QNH PRESSURE IN HPA 1021.4 1018.7 1016.3 1018.8 1020.0 1017.5 1017.8 1017.5 1018.7 1022.7 1026.8 1023.0 1019.9 MAX. QNH PRESSURE IN HPA 1030.3 1025.1 1022.7 1026.9 1023.5 1023.6 1023.8 1025.1 1025.5 1029.6 1035.4 1028.5 1035.4 DAY 26 13 29 4 7 12 3 29 26 2 18 4 MIN. QNH PRESSURE IN HPA 1011.2 1009.9 1009.2 1009.2 1014.3 1011.5 1012.3 1012.1 1012.5 1015.7 1020.2 1016.0 1009.2 DAY 6 9 2 13 25 19 7 8 21 27 6 14 MEAN QFF PRESSURE IN HPA 1027.0 1020.8 1017.4 1016.3 1012.3 1007.8 1005.3 1005.2 1008.8 1017.6 1026.6 1023.3 1015.7 MAX. QFF PRESSURE IN HPA 1037.2 1030.6 1023.4 1028.2 1016.6 1017.1 1011.2 1014.3 1016.3 1027.1 1038.4 1029.4 1038.4 DAY 26 3 29 4 7 12 3 29 25 19 18 4 MIN. QFF PRESSURE IN HPA 1012.6 1008.0 1010.7 1005.7 1003.3 1000.3 1000.6 998.9 1002.3 1010.7 1017.2 1016.2 998.9 DAY 6 9 25 13 25 19 7 8 8 13 6 29 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 857.6 855.1 852.9 854.9 855.9 853.6 853.7 853.2 854.3 858.0 861.4 858.5 855.8 MAX. QFE PRESSURE IN HPA 865.0 860.6 857.1 861.4 859.4 858.7 859.3 860.3 860.2 864.3 868.7 862.6 868.7 DAY 26 22 29 4 17 12 3 29 25 18 18 4 MIN. QFE PRESSURE IN HPA 848.5 848.1 846.3 847.1 851.2 848.9 848.7 848.8 848.3 853.2 855.2 852.9 846.3 DAY 6 9 7 13 25 19 6 8 21 5 6 29 MEAN QNH PRESSURE IN HPA 1021.4 1018.6 1016.1 1018.4 1019.6 1016.9 1016.9 1016.4 1017.7 1021.9 1025.8 1022.5 1019.3 MAX. QNH PRESSURE IN HPA 1030.0 1024.9 1020.9 1025.8 1023.5 1022.7 1023.4 1024.6 1024.5 1029.2 1034.2 1027.2 1034.2 DAY 26 22 29 4 17 12 3 29 25 18 18 4 MIN. QNH PRESSURE IN HPA 1011.0 1010.5 1008.4 1009.4 1014.1 1011.4 1011.2 1011.3 1010.7 1016.4 1018.7 1016.0 1008.4 DAY 6 9 7 13 25 19 6 8 21 5 6 29 MEAN QFF PRESSURE IN HPA 1026.6 1020.0 1016.6 1015.2 1011.7 1007.1 1004.2 1003.7 1007.1 1016.2 1024.4 1022.0 1014.6 MAX. QFF PRESSURE IN HPA 1036.5 1030.9 1022.1 1026.5 1016.1 1015.5 1011.0 1013.5 1014.8 1025.7 1035.8 1027.2 1036.5 DAY 26 3 28 4 8 12 3 29 24 18 18 18 MIN. QFF PRESSURE IN HPA 1012.8 1007.7 1009.3 1004.4 1002.9 999.3 999.1 997.7 1000.8 1008.1 1014.6 1015.8 997.7 DAY 6 9 7 13 25 19 6 8 21 5 6 27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 856.4 853.7 851.8 853.8 855.0 852.5 852.2 851.9 853.4 856.7 860.0 857.4 854.6 MAX. QFE PRESSURE IN HPA 863.2 858.9 858.2 860.0 859.2 857.1 858.2 858.3 859.4 863.9 866.7 861.2 866.7 DAY 26 22 29 4 17 12 3 29 25 18 16 8 MIN. QFE PRESSURE IN HPA 848.0 847.6 843.9 845.5 850.6 847.9 847.1 847.5 848.4 851.3 854.4 851.7 843.9 DAY 6 9 7 12 28 18 6 7 21 26 6 29 MEAN QNH PRESSURE IN HPA 1020.0 1017.0 1014.8 1017.1 1018.4 1015.5 1015.2 1014.9 1016.6 1020.4 1024.2 1021.2 1018.0 MAX. QNH PRESSURE IN HPA 1027.9 1023.0 1022.1 1024.2 1023.3 1020.9 1022.1 1022.3 1023.5 1028.7 1031.9 1025.6 1031.9 DAY 26 22 29 4 17 12 3 29 25 18 16 8 MIN. QNH PRESSURE IN HPA 1010.4 1009.9 1005.7 1007.5 1013.4 1010.3 1009.4 1009.8 1010.9 1014.2 1017.8 1014.7 1005.7 DAY 6 9 7 12 28 18 6 7 21 26 6 29 MEAN QFF PRESSURE IN HPA 1024.9 1018.1 1015.3 1014.1 1010.7 1005.8 1002.6 1002.4 1006.5 1014.8 1022.7 1020.7 1013.2 MAX. QFF PRESSURE IN HPA 1035.0 1029.4 1021.9 1024.8 1016.8 1013.1 1009.1 1010.7 1013.9 1025.3 1032.9 1025.5 1035.0 DAY 26 3 28 4 17 12 3 29 25 18 18 8 MIN. QFF PRESSURE IN HPA 1012.9 1007.5 1007.0 1004.2 1003.1 998.4 996.9 997.2 1000.4 1005.9 1014.0 1014.1 996.9 DAY 6 9 7 9 28 19 6 7 8 5 2 29 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.7 853.9 851.8 853.7 854.6 852.1 851.5 851.7 853.4 856.9 860.4 857.7 854.5 MAX. QFE PRESSURE IN HPA 864.0 858.7 858.0 859.6 859.5 856.7 857.0 857.3 859.5 864.1 867.5 861.8 867.5 DAY 25 22 29 26 17 11 3 29 25 18 15 4 MIN. QFE PRESSURE IN HPA 849.6 845.5 844.4 843.4 849.8 847.7 846.2 847.2 848.1 850.5 854.9 852.5 843.4 DAY 6 1 18 12 28 18 6 7 21 26 6 29 MEAN QNH PRESSURE IN HPA 1020.4 1017.1 1014.8 1016.9 1018.0 1015.1 1014.5 1014.7 1016.6 1020.6 1024.7 1021.6 1017.9 MAX. QNH PRESSURE IN HPA 1028.8 1022.7 1021.9 1023.8 1023.6 1020.4 1020.8 1021.1 1023.6 1028.9 1032.9 1026.3 1032.9 DAY 25 22 29 26 17 11 3 29 25 18 15 4 MIN. QNH PRESSURE IN HPA 1012.2 1007.5 1006.2 1005.1 1012.5 1010.0 1008.3 1009.5 1010.5 1013.3 1018.3 1015.6 1005.1 DAY 6 1 18 12 28 18 6 7 21 26 6 29 MEAN QFF PRESSURE IN HPA 1025.9 1019.0 1015.7 1014.6 1010.9 1006.0 1002.4 1003.3 1007.7 1016.1 1024.5 1021.8 1014.0 MAX. QFF PRESSURE IN HPA 1036.7 1030.1 1023.2 1024.6 1015.7 1013.0 1009.5 1010.9 1015.4 1026.6 1034.7 1026.7 1036.7 DAY 25 3 28 4 17 12 9 29 25 18 15 18 MIN. QFF PRESSURE IN HPA 1014.6 1008.7 1008.1 1002.0 1002.5 999.8 996.8 997.8 1001.7 1007.5 1015.8 1015.7 996.8 DAY 6 1 7 12 28 18 6 7 8 5 6 29 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 857.2 854.4 852.3 854.4 855.2 852.9 852.6 852.7 854.4 857.7 861.2 858.2 855.3 MAX. QFE PRESSURE IN HPA 864.5 859.7 858.3 861.0 860.5 858.7 858.2 858.3 860.4 864.6 868.5 862.1 868.5 DAY 25 22 28 3 17 11 3 29 25 18 16 3 MIN. QFE PRESSURE IN HPA 851.1 843.6 845.0 842.4 850.0 848.4 848.1 848.2 848.6 850.8 856.1 853.8 842.4 DAY 18 1 18 12 24 18 6 7 21 26 2 29 MEAN QNH PRESSURE IN HPA 1021.0 1017.8 1015.3 1017.8 1018.7 1016.1 1015.7 1015.9 1017.7 1021.5 1025.6 1022.2 1018.8 MAX. QNH PRESSURE IN HPA 1029.4 1023.9 1022.3 1025.4 1024.8 1022.7 1022.1 1022.3 1024.7 1029.5 1034.0 1026.6 1034.0 DAY 25 22 28 3 17 11 3 29 25 18 16 3 MIN. QNH PRESSURE IN HPA 1014.0 1005.3 1006.9 1003.9 1012.7 1010.9 1010.5 1010.6 1011.1 1013.6 1019.7 1017.1 1003.9 DAY 18 1 18 12 24 18 6 7 21 26 2 29 MEAN QFF PRESSURE IN HPA 1026.7 1019.8 1016.3 1015.1 1011.0 1006.4 1003.2 1003.7 1008.0 1016.6 1025.4 1022.5 1014.5 MAX. QFF PRESSURE IN HPA 1037.8 1030.0 1024.0 1026.3 1016.7 1015.9 1010.9 1012.0 1016.0 1026.7 1036.1 1027.5 1037.8 DAY 25 3 28 3 12 11 9 29 30 18 17 3 MIN. QFF PRESSURE IN HPA 1015.7 1006.1 1009.4 1000.7 1001.7 999.7 997.5 997.6 1002.5 1007.6 1017.7 1016.1 997.5 DAY 5 1 18 12 24 18 28 7 7 5 6 26 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 857.1 854.5 852.4 854.6 855.5 853.4 853.3 853.0 854.4 857.7 861.4 858.3 855.5 MAX. QFE PRESSURE IN HPA 865.0 860.0 858.0 861.9 860.5 859.2 858.5 858.8 860.3 864.2 868.9 862.4 868.9 DAY 25 23 28 3 3 11 3 28 30 1 17 3 MIN. QFE PRESSURE IN HPA 850.8 845.3 847.0 841.8 850.0 848.4 849.2 848.2 846.7 850.5 856.4 853.4 841.8 DAY 5 1 18 12 24 18 28 7 21 26 2 13 MEAN QNH PRESSURE IN HPA 1020.9 1017.9 1015.4 1018.0 1019.0 1016.6 1016.5 1016.2 1017.8 1021.5 1025.8 1022.2 1019.0 MAX. QNH PRESSURE IN HPA 1030.0 1024.2 1021.9 1026.4 1024.8 1023.3 1022.5 1022.8 1024.6 1029.1 1034.5 1027.0 1034.5 DAY 25 23 28 3 3 11 3 28 30 1 17 3 MIN. QNH PRESSURE IN HPA 1013.6 1007.3 1009.2 1003.2 1012.7 1010.9 1011.8 1010.6 1008.9 1013.3 1020.1 1016.6 1003.2 DAY 5 1 18 12 24 18 28 7 21 26 2 13 MEAN QFF PRESSURE IN HPA 1026.1 1019.4 1015.9 1014.8 1011.1 1006.9 1003.8 1003.5 1007.2 1016.0 1024.5 1021.8 1014.2 MAX. QFF PRESSURE IN HPA 1036.7 1029.6 1022.7 1027.6 1016.3 1015.8 1010.5 1012.3 1016.8 1025.6 1035.8 1026.3 1036.7 DAY 25 3 28 3 3 11 9 29 30 18 17 18 MIN. QFF PRESSURE IN HPA 1014.4 1009.1 1009.0 999.6 1001.4 998.4 997.2 996.5 999.3 1008.0 1016.7 1015.5 996.5 DAY 5 1 24 12 24 18 28 7 21 5 6 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.7 -5.0 0.1 9.5 16.3 21.3 24.4 25.5 19.8 15.7 7.9 3.7 11.6 MINIMUN AIR TEMPERATURE (C) -5.0 -10.1 -3.6 4.2 9.7 13.0 15.7 15.9 12.8 9.4 3.1 -0.3 5.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 13 18 12 1 0 0 0 0 0 0 0 6 50 DAYS WITH FREEZING MIN.<= 0 24 27 28 6 0 0 0 0 0 0 6 14 105 TEMPERATURE RECORDS LOWEST(C) -19.6 -23.0 -15.2 -6.0 4.2 8.4 12.0 12.0 7.6 3.6 -2.0 -7.4 -23.0 DAY 29 1 8 11 6 7 17 17 15 25 28 29 MAXIMUM AIR TEMPERATURE (C) 4.6 1.1 4.4 15.1 22.9 28.4 31.4 33.4 26.2 21.5 11.9 7.3 17.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 11 22 31 2 0 0 0 66 DAYS WITH MAXIMUM TEMP. <= 0 10 12 4 0 0 0 0 0 0 0 0 0 26 TEMPERATURE RECORDS HIGHEST(C) 12.4 9.4 11.0 28.0 28.0 32.0 36.2 36.0 30.8 27.4 16.4 13.4 36.2 DAY 14 19 31 25 27 22 28 26 19 17 16 7 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 11.2 8.0 10.9 13.2 15.4 15.7 17.5 13.4 12.1 8.8 7.6 11.9 MEAN DAILY TEMP. (MDT) (C) -0.2 -4.5 0.4 9.7 16.3 20.7 23.6 24.7 19.5 15.5 7.5 3.5 11.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 24.4 80.3 113.7 7.8 0.0 0.0 0.0 226.2 HEATING DEG. DAYS(BASE 18 0C) 563.8 630.0 545.5 252.4 64.2 3.9 0.0 0.0 7.7 82.8 316.0 449.7 2916.0 DEWPOINT (MEAN C) -7.0 -9.9 -4.2 0.2 5.1 7.0 6.8 7.4 6.2 6.0 2.8 -2.1 1.5 MIXING RATIO (G/KG) 2.89 2.42 3.45 4.72 6.62 7.62 7.71 7.88 7.08 6.92 5.55 3.95 5.57 VAPOUR PRESSURE (HPA) 3.95 3.31 4.70 6.43 9.01 10.31 10.40 10.65 9.63 9.44 7.59 5.41 7.57 SATURATION DEF. (HPA) 2.41 1.40 1.70 6.51 10.44 16.13 21.57 23.53 14.39 9.20 3.31 2.81 9.45 RELATIVE HUMIDITY (MEAN %) 66 71 75 56 52 44 37 35 44 55 72 69 56 RELATIVE HUMIDITY (MAX. %) 82 87 91 79 75 69 57 55 63 76 88 85 76 RELATIVE HUMIDITY (MIN. %) 47 52 56 37 30 24 21 20 30 39 59 52 39 RELATIVE HUMIDITY (MEAN% 03UTC) 74 82 80 72 70 64 56 53 61 73 86 80 71 RELATIVE HUMIDITY (MEAN% 09UTC) 58 66 68 46 38 35 29 28 34 44 67 64 48 RELATIVE HUMIDITY (MEAN% 15UTC) 60 63 69 46 38 29 23 21 34 47 69 65 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 103.2 123.2 127.1 73.6 53.4 7.0 1.2 0.0 0.0 12.3 87.4 36.1 624.5 DAYS WITH PRECIPITATION >=10 3 7 4 3 2 0 0 0 0 0 4 1 24 DAYS WITH PRECIPITATION >= 5 5 8 9 6 3 1 0 0 0 0 8 2 42 DAYS WITH PRECIPITATION >= 1 7 9 15 11 6 2 0 0 0 3 8 8 69 DAYS WITH PRECIPITATION 11 9 17 12 8 2 2 0 0 7 9 9 86 GREATEST DAILY PRECIPITATION 41.0 28.3 24.0 15.0 21.0 6.0 0.8 0.0 0.0 4.2 18.0 18.1 41.0 DAY 16 24 28 9 21 6 6 ** ** 20 3 10 DAY WITH THUNDER STORM 0 1 2 5 4 2 0 0 0 0 0 0 14 DAYS WITH SNOW OR SLEET 9 9 16 5 0 0 0 0 0 0 0 4 43 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 225 180 225 225 270 225 225 180 180 180 PREVAILING WIND SPEED(KNOTS) 9.0 10.6 10.3 11.4 9.9 10.0 10.3 10.0 10.3 11.0 9.3 11.4 9.8 PREVAILING WIND PERCENT 10.5 12.5 22.2 20.0 14.1 10.0 10.1 11.3 19.2 19.7 12.0 24.5 12.8 CALMS PERCENT OF WIND 67.3 70.5 59.3 45.4 58.5 69.2 65.3 64.1 50.4 50.4 72.7 49.0 60.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 228 150 155 2717 VECTOR WIND DIRECTION (MEAN) 224 184 182 205 202 219 245 229 235 207 211 190 207 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.2 3.3 4.6 1.9 1.5 1.1 2.2 2.8 3.9 1.4 4.7 2.5 WIND STEADINESES (MEAN %) 59.4 73.3 80.5 76.7 50.0 60.0 36.7 62.9 60.9 78.0 56.0 79.7 64.1 WIND SPEED (MEAN KNOTS) 3.2 3.0 4.1 6.0 3.8 2.5 3.0 3.5 4.6 5.0 2.5 5.9 3.9 FASTEST WIND DIRECTION 240 180 180 220 200 170 240 240 250 220 280 240 170 FASTEST WIND SPEED (KNOTS) 25 19 19 27 25 29 16 19 19 25 16 23 29 DAY 30 3 1 19 3 28 25 12 23 2 5 8 DAYS WITH SKY CLEAR (0-2)/8 14 16 8 5 13 25 27 30 26 17 9 10 200 DAYS WITH P.CLOUDY (3-6)/8 11 6 9 19 15 5 4 1 4 11 11 15 111 DAYS WITH CLOUDY (7-8)/8 6 6 14 6 3 0 0 0 0 3 10 6 54 DAYS WITH VISIBILITY =< 2 KM 1 6 1 0 0 0 0 0 0 0 0 1 9 DURATION OF SUNSHINE HOURS 168.0 173.8 148.8 215.5 284.6 353.2 369.7 363.8 291.6 242.3 138.1 145.1 2894.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.1 856.1 852.1 853.5 856.0 852.3 850.5 852.1 856.3 858.5 858.9 856.6 854.9 MAX. QFE PRESSURE IN HPA 863.1 864.2 865.5 861.2 861.8 857.8 856.8 856.9 862.9 865.3 869.2 864.0 869.2 DAY-HOUR 23-21 7- 9 11- 6 13- 6 12- 6 8- 6 19- 6 24- 6 14-18 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 843.0 844.9 841.5 843.6 845.3 844.9 845.7 846.6 849.9 851.8 854.2 846.9 841.5 DAY-HOUR 15-21 5- 3 19- 9 5- 3 4- 9 24-15 16-15 5-15 2-12 2-12 5- 3 10- 3 MEAN QNH PRESSURE IN HPA 1019.8 1019.7 1015.1 1016.7 1019.6 1015.4 1013.3 1015.1 1019.9 1022.5 1022.9 1020.3 1018.4 MAX. QNH PRESSURE IN HPA 1027.8 1029.1 1030.6 1025.6 1026.3 1021.7 1020.5 1020.6 1027.6 1030.3 1034.8 1028.8 1034.8 DAY-HOUR 23-21 7- 9 11- 6 13- 6 12- 6 8- 6 19- 6 24- 6 14-18 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1004.6 1006.8 1002.9 1005.3 1007.3 1006.8 1007.7 1008.8 1012.6 1014.8 1017.5 1009.1 1002.9 DAY-HOUR 15-21 5- 3 19- 9 5- 3 4- 9 24-15 16-15 5-15 2-12 2-12 5- 3 10- 3 MEAN QFF PRESSURE IN HPA 1023.8 1026.8 1018.5 1014.1 1012.8 1005.6 1001.6 1002.9 1011.0 1015.9 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.6 1045.7 1036.9 1027.9 1020.7 1013.7 1009.3 1009.2 1023.1 1023.4 ****** ****** ****** DAY-HOUR 20- 6 7- 3 11- 6 13- 6 9- 3 7- 3 19- 6 21- 6 14-18 8- 6 **-** **-** MIN. QFF PRESSURE IN HPA 1006.1 1011.7 1004.5 1001.1 1001.0 995.6 995.7 996.1 1000.2 1005.7 ****** ****** ****** DAY-HOUR 15-21 5- 0 19- 9 28- 0 4- 0 24-15 13-12 5-12 2-12 2-12 **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 856.2 855.8 851.9 853.2 855.9 852.4 850.5 852.1 856.3 858.4 ****** ****** ****** MAX. QFE PRESSURE IN HPA 863.1 862.5 864.3 859.1 860.6 857.1 854.7 855.6 861.9 863.0 ****** ****** ****** DAY 24 7 11 13 12 8 19 25 15 9 ** ** MIN. QFE PRESSURE IN HPA 843.0 845.6 843.2 845.0 845.4 846.7 847.0 848.0 851.0 853.3 ****** ****** ****** DAY 16 5 29 5 4 25 16 5 3 6 ** ** MEAN QNH PRESSURE IN HPA 1019.9 1019.4 1014.9 1016.4 1019.5 1015.5 1013.3 1015.2 1020.0 1022.4 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.8 1027.1 1029.2 1023.2 1024.9 1020.9 1018.1 1019.2 1026.4 1027.7 ****** ****** ****** DAY 24 7 11 13 12 8 19 25 15 9 ** ** MIN. QNH PRESSURE IN HPA 1004.6 1007.6 1004.9 1006.9 1007.4 1008.9 1009.2 1010.4 1013.8 1016.5 ****** ****** ****** DAY 16 5 29 5 4 25 16 5 3 6 ** ** MEAN QFF PRESSURE IN HPA 1023.4 1026.1 1018.1 1013.5 1012.5 1005.6 1001.6 1002.8 1010.7 1015.1 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.6 1042.3 1035.5 1025.0 1019.3 1012.6 1006.5 1007.4 1021.2 1020.5 ****** ****** ****** DAY 20 7 11 13 7 8 8 25 15 10 ** ** MIN. QFF PRESSURE IN HPA 1007.2 1011.7 1006.4 1001.1 1001.0 996.9 997.4 997.3 1001.4 1007.7 ****** ****** ****** DAY 16 5 25 28 4 24 11 5 2 6 ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 856.0 855.7 851.9 853.4 856.2 853.0 851.3 852.7 856.7 858.7 859.0 856.5 855.1 MAX. QFE PRESSURE IN HPA 862.1 862.8 865.0 860.2 861.4 857.6 856.3 856.1 861.9 863.8 867.8 863.0 867.8 DAY 24 7 11 13 12 8 19 24 15 9 8 28 MIN. QFE PRESSURE IN HPA 843.1 844.9 843.4 843.6 845.6 848.0 847.7 848.3 850.7 853.2 854.2 846.9 843.1 DAY 16 5 19 5 4 24 16 5 2 2 5 10 MEAN QNH PRESSURE IN HPA 1019.6 1019.3 1014.9 1016.6 1019.9 1016.2 1014.2 1015.9 1020.4 1022.7 1023.1 1020.2 1018.6 MAX. QNH PRESSURE IN HPA 1026.6 1027.4 1030.0 1024.5 1025.8 1021.5 1020.0 1019.7 1026.4 1028.6 1033.2 1027.7 1033.2 DAY 24 7 11 13 12 8 19 24 15 9 8 28 MIN. QNH PRESSURE IN HPA 1004.7 1006.8 1005.1 1005.3 1007.6 1010.4 1010.0 1010.7 1013.5 1016.4 1017.5 1009.1 1004.7 DAY 16 5 19 5 4 24 16 5 2 2 5 10 MEAN QFF PRESSURE IN HPA 1024.0 1027.0 1018.7 1014.5 1013.6 1006.8 1003.0 1004.4 1012.1 1017.2 1022.4 1022.0 1015.5 MAX. QFF PRESSURE IN HPA 1036.8 1045.7 1036.4 1027.5 1020.7 1013.7 1007.6 1008.8 1022.4 1023.2 1032.3 1032.9 1045.7 DAY 20 7 11 13 9 7 19 21 15 8 8 28 MIN. QFF PRESSURE IN HPA 1007.2 1011.9 1005.7 1003.7 1001.8 998.6 998.8 998.1 1001.5 1008.0 1015.3 1010.6 998.1 DAY 16 5 25 28 4 24 11 5 2 6 5 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 856.7 856.8 852.8 854.2 856.8 853.3 851.5 853.2 857.4 859.7 859.9 857.5 855.8 MAX. QFE PRESSURE IN HPA 862.8 863.7 865.5 861.2 861.8 857.8 856.8 856.9 862.8 865.3 869.2 864.0 869.2 DAY 12 7 11 13 12 8 19 24 15 9 8 28 MIN. QFE PRESSURE IN HPA 844.5 847.9 842.6 844.3 847.3 847.8 847.7 848.4 851.0 853.7 855.8 847.8 842.6 DAY 16 5 19 9 4 24 16 5 2 2 5 10 MEAN QNH PRESSURE IN HPA 1020.5 1020.5 1015.9 1017.5 1020.6 1016.5 1014.4 1016.4 1021.2 1023.8 1024.1 1021.4 1019.4 MAX. QNH PRESSURE IN HPA 1027.4 1028.5 1030.6 1025.6 1026.3 1021.7 1020.5 1020.6 1027.4 1030.3 1034.8 1028.8 1034.8 DAY 12 7 11 13 12 8 19 24 15 9 8 28 MIN. QNH PRESSURE IN HPA 1006.4 1010.3 1004.2 1006.1 1009.6 1010.2 1010.0 1010.9 1013.8 1017.0 1019.4 1010.2 1004.2 DAY 16 5 19 9 4 24 16 5 2 2 5 10 MEAN QFF PRESSURE IN HPA 1025.0 1028.3 1019.5 1015.1 1013.8 1006.5 1002.6 1004.1 1012.4 1017.6 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.6 1044.9 1036.9 1027.9 1020.6 1013.1 1009.3 1009.2 1022.3 1023.4 ****** ****** ****** DAY 20 7 11 13 6 8 19 21 15 8 ** ** MIN. QFF PRESSURE IN HPA 1009.0 1015.5 1006.7 1005.1 1005.3 997.8 998.2 997.1 1001.7 1008.1 ****** ****** ****** DAY 16 22 6 28 4 24 16 5 2 6 ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 856.6 856.8 852.6 853.8 856.3 852.7 850.8 852.4 856.5 858.7 859.2 856.7 855.3 MAX. QFE PRESSURE IN HPA 862.5 864.2 865.3 860.4 861.3 856.8 855.6 855.9 862.4 864.4 868.6 862.7 868.6 DAY 12 7 11 13 12 8 19 24 14 9 8 28 MIN. QFE PRESSURE IN HPA 845.9 849.7 841.5 844.0 845.3 847.1 846.7 847.8 850.5 853.2 855.8 847.5 841.5 DAY 16 4 19 9 4 24 11 5 2 2 3 9 MEAN QNH PRESSURE IN HPA 1020.3 1020.5 1015.7 1017.1 1019.9 1015.8 1013.6 1015.4 1020.2 1022.8 1023.3 1020.5 1018.8 MAX. QNH PRESSURE IN HPA 1027.1 1029.1 1030.3 1024.7 1025.7 1020.5 1019.2 1019.5 1027.0 1029.3 1034.1 1027.3 1034.1 DAY 12 7 11 13 12 8 19 24 14 9 8 28 MIN. QNH PRESSURE IN HPA 1008.0 1012.3 1002.9 1005.8 1007.3 1009.4 1008.9 1010.2 1013.3 1016.4 1019.4 1009.8 1002.9 DAY 16 4 19 9 4 24 11 5 2 2 3 9 MEAN QFF PRESSURE IN HPA 1024.0 1027.2 1018.8 1014.1 1012.7 1005.7 1001.7 1002.6 1010.7 1015.5 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1036.3 1044.4 1035.7 1025.9 1020.0 1012.2 1007.7 1007.8 1021.2 1021.7 ****** ****** ****** DAY 19 7 11 13 6 7 19 24 14 8 ** ** MIN. QFF PRESSURE IN HPA 1010.7 1014.7 1004.5 1006.1 1002.6 997.9 996.2 996.5 1000.9 1007.4 ****** ****** ****** DAY 16 22 19 5 4 24 11 5 2 2 ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.4 855.5 851.7 853.0 855.2 851.7 849.6 851.1 855.2 857.6 858.0 855.8 854.1 MAX. QFE PRESSURE IN HPA 862.1 862.6 863.7 859.3 859.9 856.1 853.9 854.4 861.4 862.3 866.8 861.5 866.8 DAY 23 7 11 13 12 8 19 24 14 9 8 27 MIN. QFE PRESSURE IN HPA 846.1 848.2 841.7 845.5 846.2 845.5 845.9 846.8 849.9 851.8 854.8 847.0 841.7 DAY 16 4 19 9 4 24 16 5 2 2 19 9 MEAN QNH PRESSURE IN HPA 1018.9 1019.0 1014.6 1016.1 1018.6 1014.6 1012.3 1013.9 1018.7 1021.5 1021.9 1019.4 1017.5 MAX. QNH PRESSURE IN HPA 1026.6 1027.2 1028.5 1023.4 1024.1 1019.7 1017.2 1017.8 1025.8 1026.9 1032.1 1026.0 1032.1 DAY 23 7 11 13 12 8 19 24 14 9 8 27 MIN. QNH PRESSURE IN HPA 1008.2 1010.6 1003.1 1007.5 1008.3 1007.5 1008.0 1009.0 1012.6 1014.8 1018.2 1009.2 1003.1 DAY 16 4 19 9 4 24 16 5 2 2 19 9 MEAN QFF PRESSURE IN HPA 1022.5 1025.5 1017.7 1013.2 1011.6 1004.8 1000.6 1001.5 1009.5 1014.2 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.3 1041.2 1034.5 1023.6 1018.3 1010.6 1005.9 1005.4 1019.7 1019.7 ****** ****** ****** DAY 19 7 10 13 6 8 19 21 14 8 ** ** MIN. QFF PRESSURE IN HPA 1011.1 1013.6 1005.2 1006.0 1002.8 995.7 995.7 996.1 1000.2 1005.7 ****** ****** ****** DAY 16 22 19 27 4 24 13 5 2 2 ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 855.7 855.6 851.7 853.1 855.1 851.3 849.3 851.0 855.2 857.9 858.3 856.4 854.2 MAX. QFE PRESSURE IN HPA 862.4 862.4 863.5 858.9 860.2 855.5 853.4 854.2 861.3 862.4 866.8 862.4 866.8 DAY 23 7 11 13 8 8 19 24 14 9 8 27 MIN. QFE PRESSURE IN HPA 845.2 848.7 842.4 846.6 846.6 844.9 845.7 846.6 850.2 852.6 854.7 847.5 842.4 DAY 15 4 28 9 4 24 16 5 2 2 4 9 MEAN QNH PRESSURE IN HPA 1019.2 1019.2 1014.7 1016.2 1018.6 1014.2 1011.9 1013.8 1018.7 1021.8 1022.3 1020.1 1017.5 MAX. QNH PRESSURE IN HPA 1027.0 1027.0 1028.3 1023.0 1024.5 1019.0 1016.6 1017.5 1025.7 1027.0 1032.1 1027.0 1032.1 DAY 23 7 11 13 8 8 19 24 14 9 8 27 MIN. QNH PRESSURE IN HPA 1007.2 1011.2 1003.9 1008.8 1008.8 1006.8 1007.7 1008.8 1012.9 1015.7 1018.1 1009.8 1003.9 DAY 15 4 28 9 4 24 16 5 2 2 4 9 MEAN QFF PRESSURE IN HPA 1023.7 1026.7 1018.3 1014.0 1012.2 1004.8 1000.8 1002.3 1010.4 1016.3 1021.5 1021.9 1014.4 MAX. QFF PRESSURE IN HPA 1035.8 1042.9 1035.9 1024.1 1019.8 1011.0 1005.0 1005.5 1020.5 1021.6 1032.1 1031.0 1042.9 DAY 19 6 10 13 8 8 19 16 14 8 7 27 MIN. QFF PRESSURE IN HPA 1009.1 1014.9 1006.0 1006.9 1003.8 995.6 996.4 996.7 1001.2 1007.5 1016.4 1011.0 995.6 DAY 15 22 25 27 4 24 13 5 2 2 4 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 856.2 856.3 852.4 853.9 856.2 852.0 850.4 852.2 856.4 858.6 ****** ****** ****** MAX. QFE PRESSURE IN HPA 863.0 862.3 863.5 859.8 860.6 856.2 854.1 855.3 862.9 863.7 ****** ****** ****** DAY 23 16 10 13 8 7 19 24 14 9 ** ** MIN. QFE PRESSURE IN HPA 844.2 849.0 843.0 847.6 848.7 846.4 847.2 847.5 851.2 854.0 ****** ****** ****** DAY 15 4 28 9 4 23 16 5 2 2 ** ** MEAN QNH PRESSURE IN HPA 1019.9 1019.9 1015.4 1017.2 1019.8 1015.0 1013.1 1015.2 1020.0 1022.6 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.7 1026.9 1028.3 1024.0 1024.9 1019.8 1017.4 1018.8 1027.6 1028.5 ****** ****** ****** DAY 23 16 10 13 8 7 19 24 14 9 ** ** MIN. QNH PRESSURE IN HPA 1006.0 1011.5 1004.6 1009.9 1011.2 1008.5 1009.5 1009.8 1014.1 1017.3 ****** ****** ****** DAY 15 4 28 9 4 23 16 5 2 2 ** ** MEAN QFF PRESSURE IN HPA 1024.5 1027.5 1018.9 1014.8 1013.0 1005.1 1001.4 1003.0 1011.3 1016.2 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.6 1042.6 1036.4 1025.1 1019.0 1011.9 1006.6 1007.1 1023.1 1021.9 ****** ****** ****** DAY 19 6 10 12 6 7 19 24 14 9 ** ** MIN. QFF PRESSURE IN HPA 1007.2 1015.5 1007.1 1003.1 1006.1 996.8 997.3 996.8 1002.1 1008.7 ****** ****** ****** DAY 15 21 25 27 3 23 11 5 2 2 ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 856.3 856.3 852.2 853.7 856.5 852.5 850.8 852.4 856.5 858.6 ****** ****** ****** MAX. QFE PRESSURE IN HPA 863.1 862.7 864.3 859.8 860.7 857.2 854.6 855.6 862.9 864.2 ****** ****** ****** DAY 23 16 10 13 8 7 19 24 14 9 ** ** MIN. QFE PRESSURE IN HPA 843.0 847.6 843.2 844.5 848.4 846.4 847.2 848.1 851.0 854.0 ****** ****** ****** DAY 15 4 28 4 3 23 16 5 2 2 ** ** MEAN QNH PRESSURE IN HPA 1019.9 1019.9 1015.2 1017.0 1020.1 1015.5 1013.6 1015.4 1020.2 1022.6 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.8 1027.3 1029.2 1024.0 1025.0 1021.0 1018.0 1019.2 1027.6 1029.1 ****** ****** ****** DAY 23 16 10 13 8 7 19 24 14 9 ** ** MIN. QNH PRESSURE IN HPA 1004.6 1009.9 1004.9 1006.4 1010.9 1008.5 1009.5 1010.5 1013.8 1017.3 ****** ****** ****** DAY 15 4 28 4 3 23 16 5 2 2 ** ** MEAN QFF PRESSURE IN HPA 1023.8 1026.5 1018.2 1013.9 1012.9 1005.4 1001.7 1002.7 1010.8 1015.2 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.9 1042.0 1036.2 1025.4 1019.5 1013.3 1006.7 1007.1 1022.6 1021.2 ****** ****** ****** DAY 19 6 10 12 6 7 19 24 14 9 ** ** MIN. QFF PRESSURE IN HPA 1006.1 1013.2 1005.8 1003.0 1004.1 996.9 996.0 996.8 1002.1 1008.5 ****** ****** ****** DAY 15 21 28 27 3 23 11 5 2 2 ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.2 -1.5 5.5 11.9 16.4 23.3 25.5 26.6 21.7 15.2 12.2 7.4 13.4 MINIMUN AIR TEMPERATURE (C) -7.0 -6.3 1.0 6.0 9.5 14.8 18.3 18.4 14.2 7.8 6.4 1.9 7.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 1 0 0 0 0 6 DAYS WITH MINIMUM TEMP. <=-4 18 19 2 0 0 0 0 0 0 0 0 2 41 DAYS WITH FREEZING MIN.<= 0 31 24 13 2 0 0 0 0 0 0 0 13 83 TEMPERATURE RECORDS LOWEST(C) -21.0 -17.6 -6.4 -0.8 4.4 9.8 15.0 15.2 10.0 3.8 1.4 -4.0 -21.0 DAY 14 21 3 1 4 4 26 21 27 27 25 20 MAXIMUM AIR TEMPERATURE (C) 0.4 2.4 9.5 17.6 22.7 30.3 31.8 33.9 28.8 22.3 17.6 11.8 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 17 24 28 13 0 0 0 83 DAYS WITH MAXIMUM TEMP. <= 0 14 10 0 0 0 0 0 0 0 0 0 0 24 TEMPERATURE RECORDS HIGHEST(C) 4.4 10.6 15.0 26.6 30.0 35.4 36.0 38.4 36.4 28.2 21.4 19.4 38.4 DAY 26 6 12 15 9 23 18 29 1 6 6 10 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 8.7 8.5 11.6 13.2 15.5 13.5 15.5 14.6 14.5 11.2 9.9 12.0 MEAN DAILY TEMP. (MDT) (C) -3.3 -1.9 5.2 11.8 16.1 22.5 25.1 26.2 21.5 15.1 12.0 6.9 13.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.4 57.2 125.8 159.8 35.6 0.0 0.0 0.0 378.8 HEATING DEG. DAYS(BASE 18 0C) 661.2 558.1 396.4 186.4 73.3 1.4 0.0 0.0 2.6 94.3 180.2 345.1 2498.9 DEWPOINT (MEAN C) -6.5 -7.0 -0.7 3.3 6.6 7.2 9.3 6.8 3.3 0.5 0.9 -2.0 1.8 MIXING RATIO (G/KG) 2.88 2.80 4.41 5.80 7.31 7.67 8.88 7.55 5.86 4.72 4.92 3.96 5.56 VAPOUR PRESSURE (HPA) 3.93 3.83 6.01 7.89 9.93 10.41 11.98 10.23 7.97 6.47 6.74 5.43 7.57 SATURATION DEF. (HPA) 1.10 1.94 3.33 6.78 9.67 19.49 21.73 26.07 19.17 11.72 7.90 5.33 11.18 RELATIVE HUMIDITY (MEAN %) 80 68 68 59 56 39 38 31 33 40 51 55 52 RELATIVE HUMIDITY (MAX. %) 92 83 86 81 82 59 57 48 50 59 70 72 70 RELATIVE HUMIDITY (MIN. %) 65 54 51 39 34 24 25 19 19 25 35 41 36 RELATIVE HUMIDITY (MEAN% 03UTC) 90 76 81 77 78 56 55 48 50 57 66 69 67 RELATIVE HUMIDITY (MEAN% 09UTC) 76 64 62 47 42 31 32 25 25 31 44 49 44 RELATIVE HUMIDITY (MEAN% 15UTC) 76 66 62 48 41 27 27 20 24 30 46 49 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 119.4 55.8 160.6 71.4 34.8 6.2 0.0 0.0 0.0 1.0 38.4 37.6 525.2 DAYS WITH PRECIPITATION >=10 3 2 5 3 1 0 0 0 0 0 2 1 17 DAYS WITH PRECIPITATION >= 5 6 4 7 5 3 1 0 0 0 0 2 3 31 DAYS WITH PRECIPITATION >= 1 14 7 11 9 7 1 0 0 0 1 5 6 61 DAYS WITH PRECIPITATION 15 9 14 11 9 3 0 0 0 1 7 7 76 GREATEST DAILY PRECIPITATION 35.0 22.0 58.0 23.0 12.0 5.0 0.0 0.0 0.0 1.0 18.6 19.0 58.0 DAY 12 8 17 28 3 3 ** ** ** 19 11 30 DAY WITH THUNDER STORM 0 1 1 2 6 1 0 0 0 0 1 0 12 DAYS WITH SNOW OR SLEET 12 5 7 0 0 0 0 0 0 0 0 2 26 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 225 225 225 225 180 360 360 225 225 225 180 225 PREVAILING WIND SPEED(KNOTS) 8.5 15.1 13.5 10.1 10.1 7.3 6.4 6.4 10.0 8.8 11.2 9.5 11.0 PREVAILING WIND PERCENT 12.9 10.0 20.9 16.7 9.7 4.6 7.7 6.9 17.1 8.5 18.7 16.8 11.0 CALMS PERCENT OF WIND 74.8 67.9 45.5 61.7 71.4 80.4 74.2 75.4 64.2 71.4 58.8 58.1 67.7 NO. OF WIND OBSERVATION 155 140 187 240 248 240 248 248 240 248 187 155 2536 VECTOR WIND DIRECTION (MEAN) 183 219 219 211 223 255 281 265 236 247 215 200 219 VECTOR WIND MAGNITUDE(KNOTS) 1.7 2.0 4.2 2.4 1.9 0.4 0.5 1.1 2.1 1.0 3.3 3.0 1.9 WIND STEADINESES (MEAN %) 70.8 57.1 65.6 66.7 70.4 28.6 23.8 47.8 70.0 40.0 73.3 75.0 59.4 WIND SPEED (MEAN KNOTS) 2.4 3.5 6.4 3.6 2.7 1.4 2.1 2.3 3.0 2.5 4.5 4.0 3.2 FASTEST WIND DIRECTION 190 240 340 240 270 250 330 240 240 270 260 210 240 FASTEST WIND SPEED (KNOTS) 16 25 29 19 19 16 17 39 17 17 25 23 39 DAY 7 14 30 21 21 1 28 20 6 17 28 8 DAYS WITH SKY CLEAR (0-2)/8 8 9 10 10 11 29 26 30 28 24 13 13 211 DAYS WITH P.CLOUDY (3-6)/8 10 12 12 15 20 1 5 1 2 5 14 13 110 DAYS WITH CLOUDY (7-8)/8 13 7 9 5 0 0 0 0 0 2 3 5 44 DAYS WITH VISIBILITY =< 2 KM 5 2 1 0 0 0 0 0 0 0 0 0 8 DURATION OF SUNSHINE HOURS 103.0 134.9 199.2 218.8 300.8 370.9 359.4 357.4 307.9 260.9 211.6 166.7 2991.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 854.7 856.2 853.6 855.1 855.4 854.8 851.7 854.0 855.1 859.1 858.8 859.4 855.7 MAX. QFE PRESSURE IN HPA 863.7 868.2 861.8 866.1 863.0 861.2 859.0 858.0 861.0 865.9 864.7 867.0 868.2 DAY-HOUR 22- 6 22- 9 26- 6 12- 6 8- 6 17- 3 20- 6 2-21 27- 3 9- 6 21- 6 29- 6 MIN. QFE PRESSURE IN HPA 844.5 842.5 843.4 846.9 847.8 850.0 845.1 847.4 850.0 851.6 851.2 852.8 842.5 DAY-HOUR 12-15 8- 3 17- 6 21-12 21- 0 24- 3 4-15 20-12 4-15 1-12 9-12 17- 3 MEAN QNH PRESSURE IN HPA 1018.1 1019.9 1016.8 1018.6 1018.9 1018.2 1014.7 1017.3 1018.6 1023.2 1022.8 1023.5 1019.2 MAX. QNH PRESSURE IN HPA 1028.5 1033.7 1026.3 1031.2 1027.7 1025.6 1023.1 1021.9 1025.4 1031.0 1029.6 1032.3 1033.7 DAY-HOUR 22- 6 22- 9 26- 6 12- 6 8- 6 17- 3 20- 6 2-21 27- 3 9- 6 21- 6 29- 6 MIN. QNH PRESSURE IN HPA 1006.4 1004.0 1005.1 1009.1 1010.2 1012.7 1007.0 1009.7 1012.7 1014.5 1014.1 1015.9 1004.0 DAY-HOUR 12-15 8- 3 17- 6 21-12 21- 0 24- 3 4-15 20-12 4-15 1-12 9-12 17- 3 MEAN QFF PRESSURE IN HPA ****** ****** 1016.9 1014.4 1011.9 1007.2 1002.3 1004.6 1008.7 1017.2 1018.6 ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** 1029.3 1025.4 1023.4 1016.1 1010.3 1010.5 1019.3 1027.1 1027.3 ****** ****** DAY-HOUR **-** **-** 26- 3 12- 6 4- 3 17- 3 21- 3 3- 3 27- 3 9- 9 25- 3 **-** MIN. QFF PRESSURE IN HPA ****** ****** 1002.1 1003.6 1001.7 998.8 994.4 995.8 1001.0 1005.3 1007.1 ****** ****** DAY-HOUR **-** **-** 29-15 21-12 21- 0 24- 3 5- 0 20-12 4- 9 1-12 9-12 **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 854.8 855.3 854.9 852.0 854.2 855.2 859.2 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 865.3 861.7 859.9 857.8 857.1 859.7 865.5 ****** ****** ****** DAY ** ** ** 12 8 17 20 3 27 14 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** 847.6 847.8 850.8 845.7 850.4 851.5 853.8 ****** ****** ****** DAY ** ** ** 24 21 24 5 13 5 1 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** 1018.3 1018.7 1018.3 1015.0 1017.5 1018.7 1023.3 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1030.3 1026.2 1024.1 1021.7 1020.9 1023.9 1030.6 ****** ****** ****** DAY ** ** ** 12 8 17 20 3 27 14 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** 1009.9 1010.2 1013.6 1007.7 1013.2 1014.4 1017.1 ****** ****** ****** DAY ** ** ** 24 21 24 5 13 5 1 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** 1013.8 1011.7 1007.4 1002.5 1004.6 1008.4 1016.8 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1024.2 1023.2 1012.4 1008.6 1009.4 1016.6 1025.3 ****** ****** ****** DAY ** ** ** 12 4 4 21 3 27 10 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1004.5 1001.7 999.5 994.4 998.2 1002.1 1007.2 ****** ****** ****** DAY ** ** ** 21 21 24 5 13 2 1 ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 854.4 855.8 853.3 855.2 855.8 855.5 852.5 854.8 855.7 859.6 859.0 859.5 855.9 MAX. QFE PRESSURE IN HPA 862.1 867.5 860.8 865.3 862.5 861.2 858.6 857.6 861.0 865.5 863.9 866.4 867.5 DAY 22 23 26 12 8 17 20 3 27 14 22 29 MIN. QFE PRESSURE IN HPA 844.9 842.5 843.7 847.8 848.6 850.0 846.0 850.9 851.9 854.0 852.2 852.8 842.5 DAY 30 8 17 21 21 24 5 13 4 1 10 17 MEAN QNH PRESSURE IN HPA 1017.7 1019.4 1016.4 1018.7 1019.3 1019.0 1015.6 1018.2 1019.3 1023.7 1023.1 1023.6 1019.5 MAX. QNH PRESSURE IN HPA 1026.6 1032.9 1025.1 1030.3 1027.1 1025.6 1022.6 1021.5 1025.4 1030.6 1028.7 1031.6 1032.9 DAY 22 23 26 12 8 17 20 3 27 14 22 29 MIN. QNH PRESSURE IN HPA 1006.8 1004.0 1005.4 1010.2 1011.1 1012.7 1008.1 1013.7 1014.9 1017.3 1015.2 1015.9 1004.0 DAY 30 8 17 21 21 24 5 13 4 1 10 17 MEAN QFF PRESSURE IN HPA 1023.9 1024.5 1017.0 1015.1 1013.0 1008.5 1003.6 1006.1 1010.2 1018.7 1019.8 1023.4 1015.3 MAX. QFF PRESSURE IN HPA 1036.0 1039.4 1029.3 1025.1 1023.4 1016.1 1010.3 1010.5 1019.3 1026.3 1027.3 1033.7 1039.4 DAY 16 23 26 12 4 17 21 3 27 13 25 29 MIN. QFF PRESSURE IN HPA 1010.7 1003.9 1005.0 1006.4 1002.9 998.8 995.9 999.9 1004.4 1009.1 1009.2 1011.9 995.9 DAY 30 8 17 22 29 24 5 16 2 1 10 17 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 855.4 857.0 854.0 855.9 856.3 855.8 852.7 855.4 856.3 860.5 859.9 860.4 856.6 MAX. QFE PRESSURE IN HPA 863.7 868.0 861.8 866.1 863.0 861.0 859.0 857.8 860.8 865.9 864.7 867.0 868.0 DAY 22 23 26 12 8 17 20 25 27 9 21 29 MIN. QFE PRESSURE IN HPA 847.5 843.6 843.4 848.0 848.2 850.4 846.0 851.2 851.8 853.9 853.0 854.6 843.4 DAY 30 8 17 21 21 24 5 16 5 1 10 17 MEAN QNH PRESSURE IN HPA 1018.9 1020.8 1017.3 1019.5 1019.9 1019.4 1015.8 1018.9 1019.9 1024.8 1024.1 1024.7 1020.3 MAX. QNH PRESSURE IN HPA 1028.5 1033.4 1026.3 1031.2 1027.7 1025.4 1023.1 1021.7 1025.1 1031.0 1029.6 1032.3 1033.4 DAY 22 23 26 12 8 17 20 25 27 9 21 29 MIN. QNH PRESSURE IN HPA 1009.8 1005.3 1005.1 1010.4 1010.6 1013.2 1008.1 1014.1 1014.8 1017.2 1016.2 1018.0 1005.1 DAY 30 8 17 21 21 24 5 16 5 1 10 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1015.6 1012.9 1008.3 1003.4 1006.1 1010.1 1019.0 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1025.4 1023.1 1015.5 1010.0 1010.1 1018.3 1026.8 ****** ****** ****** DAY ** ** ** 12 4 17 21 3 27 9 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1005.8 1002.8 999.5 995.3 999.2 1004.0 1008.0 ****** ****** ****** DAY ** ** ** 21 21 24 5 16 4 1 ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.2 856.8 853.7 855.4 855.7 855.2 852.0 854.4 855.4 859.4 859.1 859.6 856.0 MAX. QFE PRESSURE IN HPA 862.9 868.2 861.6 865.4 862.5 860.0 857.8 857.0 860.2 865.6 864.0 866.0 868.2 DAY 22 22 26 12 8 17 20 3 27 9 22 29 MIN. QFE PRESSURE IN HPA 847.0 844.7 844.2 847.5 848.7 850.3 845.6 849.9 850.9 852.3 851.9 854.2 844.2 DAY 12 8 17 21 21 24 5 20 4 1 9 17 MEAN QNH PRESSURE IN HPA 1018.7 1020.6 1017.0 1018.9 1019.3 1018.7 1015.0 1017.7 1018.9 1023.6 1023.2 1023.8 1019.6 MAX. QNH PRESSURE IN HPA 1027.6 1033.7 1026.1 1030.4 1027.1 1024.2 1021.7 1020.8 1024.5 1030.7 1028.8 1031.1 1033.7 DAY 22 22 26 12 8 17 20 3 27 9 22 29 MIN. QNH PRESSURE IN HPA 1009.2 1006.6 1006.0 1009.8 1011.2 1013.0 1007.6 1012.6 1013.7 1015.3 1014.9 1017.5 1006.0 DAY 12 8 17 21 21 24 5 20 4 1 9 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1014.5 1012.0 1007.5 1002.4 1004.6 1008.3 1017.0 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1023.5 1020.8 1013.1 1008.9 1009.6 1016.5 1027.1 ****** ****** ****** DAY ** ** ** 6 4 17 21 3 27 9 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1005.1 1003.4 1000.3 994.4 998.3 1001.0 1005.4 ****** ****** ****** DAY ** ** ** 17 21 24 5 20 4 1 ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 854.2 855.7 852.8 854.5 854.9 854.1 850.7 852.9 854.1 858.0 857.9 858.6 854.9 MAX. QFE PRESSURE IN HPA 861.4 868.2 860.0 863.7 861.2 858.2 856.6 855.2 858.3 864.5 863.0 864.3 868.2 DAY 22 22 26 12 3 17 20 3 28 9 22 28 MIN. QFE PRESSURE IN HPA 845.7 844.0 843.8 846.9 848.4 850.1 845.6 847.4 850.2 851.6 851.2 853.0 843.8 DAY 12 14 17 21 21 24 5 20 4 1 9 20 MEAN QNH PRESSURE IN HPA 1017.5 1019.2 1015.9 1017.9 1018.3 1017.4 1013.6 1016.1 1017.4 1021.9 1021.8 1022.6 1018.3 MAX. QNH PRESSURE IN HPA 1025.8 1033.7 1024.2 1028.5 1025.6 1022.1 1020.3 1018.7 1022.3 1029.4 1027.7 1029.2 1033.7 DAY 22 22 26 12 3 17 20 3 28 9 22 28 MIN. QNH PRESSURE IN HPA 1007.7 1005.8 1005.6 1009.1 1010.9 1012.8 1007.6 1009.7 1012.9 1014.5 1014.1 1016.2 1005.6 DAY 12 14 17 21 21 24 5 20 4 1 9 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1013.4 1011.2 1006.4 1001.1 1003.1 1007.2 1015.5 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1021.7 1023.1 1012.1 1007.2 1007.8 1014.7 1025.9 ****** ****** ****** DAY ** ** ** 12 3 3 21 3 27 9 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1003.6 1003.4 999.5 994.6 995.8 1001.8 1005.3 ****** ****** ****** DAY ** ** ** 21 21 24 5 20 4 1 ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 854.4 855.8 853.0 854.5 854.5 853.5 850.3 852.7 854.0 858.1 858.4 859.0 854.8 MAX. QFE PRESSURE IN HPA 861.0 868.2 859.0 863.3 860.8 858.5 855.8 855.0 858.2 864.4 862.9 864.7 868.2 DAY 22 22 21 11 3 16 20 24 26 13 21 28 MIN. QFE PRESSURE IN HPA 844.5 844.7 843.8 846.9 848.5 850.1 845.1 849.5 850.0 851.7 851.3 853.2 843.8 DAY 12 14 29 21 20 26 4 12 4 1 9 20 MEAN QNH PRESSURE IN HPA 1017.7 1019.4 1016.2 1017.8 1017.9 1016.8 1013.1 1015.8 1017.3 1022.1 1022.4 1023.1 1018.3 MAX. QNH PRESSURE IN HPA 1025.4 1033.7 1023.1 1028.0 1025.1 1022.5 1019.4 1018.5 1022.1 1029.3 1027.6 1029.6 1033.7 DAY 22 22 21 11 3 16 20 24 26 13 21 28 MIN. QNH PRESSURE IN HPA 1006.4 1006.6 1005.6 1009.1 1011.0 1012.8 1007.0 1012.1 1012.7 1014.7 1014.2 1016.4 1005.6 DAY 12 14 29 21 20 26 4 12 4 1 9 20 MEAN QFF PRESSURE IN HPA 1023.9 1024.5 1016.6 1014.1 1011.4 1006.2 1001.2 1003.7 1008.3 1017.0 1019.1 1022.9 1014.1 MAX. QFF PRESSURE IN HPA 1034.9 1040.7 1025.4 1022.8 1022.7 1012.1 1007.8 1007.6 1015.9 1026.0 1025.7 1031.3 1040.7 DAY 16 22 21 11 3 16 21 3 26 9 24 28 MIN. QFF PRESSURE IN HPA 1011.7 1007.8 1002.1 1004.7 1004.4 1000.1 995.4 999.0 1002.7 1007.1 1007.9 1015.1 995.4 DAY 12 7 29 21 20 24 4 12 4 1 9 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 855.3 855.3 854.4 851.5 853.9 855.2 859.0 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 864.6 861.3 858.9 856.7 857.3 859.7 865.0 ****** ****** ****** DAY ** ** ** 11 3 16 19 2 26 13 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** 847.8 849.3 850.7 845.9 850.4 851.2 852.1 ****** ****** ****** DAY ** ** ** 21 20 24 4 12 4 1 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** 1018.8 1018.9 1017.7 1014.4 1017.2 1018.6 1023.1 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1029.5 1025.7 1023.0 1020.4 1021.1 1023.9 1030.0 ****** ****** ****** DAY ** ** ** 11 3 16 19 2 26 13 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** 1010.2 1011.9 1013.5 1008.0 1013.2 1014.1 1015.1 ****** ****** ****** DAY ** ** ** 21 20 24 4 12 4 1 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** 1014.8 1011.8 1006.6 1002.0 1004.4 1008.9 1017.3 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1024.4 1022.1 1012.0 1007.7 1009.4 1017.4 1026.3 ****** ****** ****** DAY ** ** ** 11 3 5 21 2 26 9 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1005.2 1004.3 1001.0 995.4 999.0 1002.9 1006.7 ****** ****** ****** DAY ** ** ** 21 20 24 4 12 3 1 ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 855.3 855.5 854.8 852.1 854.2 855.2 859.2 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 865.3 861.7 859.7 857.4 858.0 859.7 865.2 ****** ****** ****** DAY ** ** ** 11 7 16 19 2 26 13 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** 848.2 849.3 851.1 846.5 850.4 851.2 853.5 ****** ****** ****** DAY ** ** ** 23 20 26 4 12 4 1 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** 1018.8 1019.1 1018.3 1015.2 1017.5 1018.7 1023.3 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1030.3 1026.2 1023.9 1021.2 1021.9 1023.9 1030.2 ****** ****** ****** DAY ** ** ** 11 7 16 19 2 26 13 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** 1010.6 1011.9 1014.0 1008.7 1013.2 1014.1 1016.7 ****** ****** ****** DAY ** ** ** 23 20 26 4 12 4 1 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** 1014.2 1011.7 1007.1 1002.7 1004.5 1008.3 1016.8 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1023.7 1022.3 1012.7 1008.1 1010.3 1016.2 1025.5 ****** ****** ****** DAY ** ** ** 11 3 5 20 2 26 9 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1005.9 1002.8 1000.4 995.6 998.3 1001.8 1006.7 ****** ****** ****** DAY ** ** ** 21 28 23 5 12 3 1 ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.2 4.3 6.7 13.4 19.6 25.0 26.7 29.1 22.9 17.4 7.5 4.0 14.8 MINIMUN AIR TEMPERATURE (C) -2.4 -1.0 0.6 6.4 10.0 15.6 17.8 19.6 13.8 10.4 2.7 -0.4 7.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 9 0 0 0 0 12 DAYS WITH MINIMUM TEMP. <=-4 11 4 0 0 0 0 0 0 0 0 1 4 20 DAYS WITH FREEZING MIN.<= 0 25 17 15 0 0 0 0 0 0 0 9 20 86 TEMPERATURE RECORDS LOWEST(C) -8.0 -5.0 -3.8 1.4 2.6 10.0 13.6 14.8 9.0 3.6 -4.0 -4.4 -8.0 DAY 14 23 28 10 21 5 15 31 24 14 30 5 MAXIMUM AIR TEMPERATURE (C) 4.7 8.6 11.5 17.9 25.2 29.8 31.8 34.4 28.3 21.9 12.8 9.4 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 13 24 31 11 2 0 0 83 DAYS WITH MAXIMUM TEMP. <= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 10.4 14.0 17.4 23.4 32.0 33.8 36.6 38.0 32.4 30.4 19.0 17.0 38.0 DAY 31 28 7 25 30 20 20 2 4 1 21 31 DIF. BETWEEN (MAX.-MIN.) (C) 7.1 9.6 10.9 11.5 15.2 14.2 14.0 14.8 14.5 11.5 10.1 9.8 12.0 MEAN DAILY TEMP. (MDT) (C) 1.2 3.8 6.0 12.2 17.6 22.7 24.8 27.0 21.0 16.1 7.8 4.5 13.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.9 54.8 119.9 185.1 29.3 0.7 0.0 0.0 395.7 HEATING DEG. DAYS(BASE 18 0C) 522.1 397.8 370.6 174.8 43.0 0.0 0.0 0.0 4.5 78.4 306.9 418.6 2316.7 DEWPOINT (MEAN C) -3.0 -3.1 -1.6 0.6 2.5 5.1 7.1 5.4 3.6 1.2 -2.0 -2.8 1.1 MIXING RATIO (G/KG) 3.65 3.64 4.08 4.78 5.57 6.66 7.71 6.94 5.97 5.02 3.98 3.72 5.14 VAPOUR PRESSURE (HPA) 4.99 4.97 5.56 6.52 7.58 9.02 10.42 9.40 8.12 6.87 5.45 5.12 7.00 SATURATION DEF. (HPA) 1.78 3.70 4.64 9.57 16.55 23.70 25.99 32.22 21.27 14.16 5.56 3.28 13.54 RELATIVE HUMIDITY (MEAN %) 76 62 59 46 37 30 32 25 31 38 54 64 46 RELATIVE HUMIDITY (MAX. %) 89 82 80 68 62 48 49 42 51 56 74 81 65 RELATIVE HUMIDITY (MIN. %) 62 44 43 31 21 18 21 15 20 27 38 45 32 RELATIVE HUMIDITY (MEAN% 03UTC) 87 78 76 68 59 47 49 42 52 53 72 76 63 RELATIVE HUMIDITY (MEAN% 09UTC) 71 55 50 40 29 27 29 20 25 31 46 53 40 RELATIVE HUMIDITY (MEAN% 15UTC) 72 52 54 37 28 21 22 18 25 38 48 56 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 70.0 91.0 60.4 57.6 4.6 0.0 5.4 1.0 0.6 32.0 44.6 37.7 404.9 DAYS WITH PRECIPITATION >=10 2 4 2 1 0 0 0 0 0 1 3 2 15 DAYS WITH PRECIPITATION >= 5 4 5 4 2 0 0 0 0 0 2 3 3 23 DAYS WITH PRECIPITATION >= 1 10 10 12 4 3 0 2 1 0 5 4 5 56 DAYS WITH PRECIPITATION 10 11 14 5 6 0 3 1 1 9 5 6 71 GREATEST DAILY PRECIPITATION 28.6 23.0 15.0 45.0 1.0 0.0 4.0 1.0 0.6 16.0 18.0 15.3 45.0 DAY 9 18 11 1 14 ** 15 10 22 25 1 15 DAY WITH THUNDER STORM 0 0 0 2 2 0 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 8 5 3 0 0 0 0 0 0 0 2 2 20 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 225 225 225 225 180 225 225 225 225 180 225 PREVAILING WIND SPEED(KNOTS) 8.5 10.0 11.6 12.4 12.5 10.8 8.0 11.3 9.5 10.6 11.2 9.9 11.2 PREVAILING WIND PERCENT 2.6 25.0 19.4 25.3 13.5 14.7 12.3 8.4 20.0 17.4 15.2 10.1 13.2 CALMS PERCENT OF WIND 93.5 48.6 59.4 49.3 56.1 57.3 58.7 71.0 56.7 52.9 58.5 75.8 62.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 164 248 1932 VECTOR WIND DIRECTION (MEAN) 192 198 217 217 226 211 167 242 234 226 198 196 215 VECTOR WIND MAGNITUDE(KNOTS) 0.4 4.4 2.7 4.4 3.3 2.8 0.2 1.6 2.6 3.1 2.8 1.5 2.4 WIND STEADINESES (MEAN %) 66.7 80.0 62.8 77.2 64.7 65.1 6.3 61.5 68.4 68.9 73.7 65.2 63.2 WIND SPEED (MEAN KNOTS) 0.6 5.5 4.3 5.7 5.1 4.3 3.2 2.6 3.8 4.5 3.8 2.3 3.8 FASTEST WIND DIRECTION 240 210 260 240 180 230 220 240 270 220 240 250 210 FASTEST WIND SPEED (KNOTS) 16 23 19 21 21 21 16 17 21 21 19 23 23 DAY 29 7 22 13 7 2 2 28 15 18 17 26 DAYS WITH SKY CLEAR (0-2)/8 13 17 15 9 18 27 27 25 26 19 10 12 218 DAYS WITH P.CLOUDY (3-6)/8 7 5 8 18 12 2 2 6 4 7 18 12 101 DAYS WITH CLOUDY (7-8)/8 11 6 8 3 1 1 2 0 0 5 2 7 46 DAYS WITH VISIBILITY =< 2 KM 5 2 1 0 0 0 0 0 0 0 0 0 8 DURATION OF SUNSHINE HOURS 140.3 197.2 220.0 269.2 304.6 351.7 356.8 323.7 316.3 232.3 184.6 156.3 3053.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 857.4 854.6 853.7 854.6 854.4 852.0 851.0 853.0 854.6 857.5 858.1 860.7 855.1 MAX. QFE PRESSURE IN HPA 868.5 862.6 860.7 862.0 861.8 858.2 855.4 861.2 860.4 862.4 865.0 866.8 868.5 DAY-HOUR 2- 6 11- 6 18- 6 10- 6 28- 6 16- 6 19- 3 20- 6 28- 6 13- 6 3- 6 5- 6 MIN. QFE PRESSURE IN HPA 846.8 840.1 845.7 845.5 846.4 843.5 845.3 848.7 850.0 853.0 850.3 850.6 840.1 DAY-HOUR 9-12 20-12 21- 3 8- 9 20- 3 24-15 21-15 13-15 12-12 31-12 26- 3 15- 9 MEAN QNH PRESSURE IN HPA 1021.2 1018.0 1017.0 1017.9 1017.8 1015.1 1013.9 1016.2 1017.9 1021.3 1022.1 1025.0 1018.6 MAX. QNH PRESSURE IN HPA 1034.0 1027.2 1025.0 1026.5 1026.3 1022.1 1018.9 1025.6 1024.7 1027.0 1030.0 1032.1 1034.0 DAY-HOUR 2- 6 11- 6 18- 6 10- 6 28- 6 16- 6 19- 3 20- 6 28- 6 13- 6 3- 6 5- 6 MIN. QNH PRESSURE IN HPA 1009.0 1001.3 1007.7 1007.5 1008.5 1005.2 1007.3 1011.2 1012.7 1016.2 1013.0 1013.4 1001.3 DAY-HOUR 9-12 20-12 21- 3 8- 9 20- 3 24-15 21-15 13-15 12-12 31-12 26- 3 15- 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1035.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 5- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** 15- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 860.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 865.0 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 6 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 853.2 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 14 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1030.0 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 6 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.4 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1032.9 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.9 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.2 854.9 853.8 854.8 854.8 852.8 851.9 853.7 855.1 857.7 858.0 860.7 855.5 MAX. QFE PRESSURE IN HPA 868.1 860.8 860.0 860.6 860.1 857.9 855.4 860.8 859.9 861.3 864.1 865.4 868.1 DAY 2 11 5 10 28 16 19 20 28 7 3 5 MIN. QFE PRESSURE IN HPA 847.3 843.6 845.7 846.4 846.4 843.8 848.0 850.8 851.5 853.8 850.3 853.1 843.6 DAY 9 20 21 8 20 25 6 6 16 31 26 14 MEAN QNH PRESSURE IN HPA 1021.0 1018.3 1017.0 1018.3 1018.3 1015.9 1014.9 1017.0 1018.6 1021.6 1022.0 1025.0 1019.0 MAX. QNH PRESSURE IN HPA 1033.6 1025.1 1024.2 1024.9 1024.3 1021.8 1018.9 1025.1 1024.1 1025.7 1028.9 1030.4 1033.6 DAY 2 11 5 10 28 16 19 20 28 7 3 5 MIN. QNH PRESSURE IN HPA 1009.6 1005.3 1007.7 1008.5 1008.5 1005.6 1010.4 1013.6 1014.4 1017.1 1013.0 1016.3 1005.3 DAY 9 20 21 8 20 25 6 6 16 31 26 14 MEAN QFF PRESSURE IN HPA 1024.4 1019.9 1017.3 1014.5 1011.1 1005.4 1003.0 1004.4 1009.8 1015.6 1021.4 1026.7 1014.5 MAX. QFF PRESSURE IN HPA 1037.9 1028.0 1025.2 1025.2 1019.9 1012.5 1007.9 1013.6 1018.8 1022.0 1031.8 1033.2 1037.9 DAY 2 23 5 10 21 17 18 20 28 27 30 5 MIN. QFF PRESSURE IN HPA 1012.5 1005.4 1006.3 1004.2 999.7 993.4 996.6 1000.1 1004.8 1008.8 1010.7 1015.9 993.4 DAY 9 20 21 8 20 25 22 5 15 12 25 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.2 855.6 854.6 855.4 855.3 853.1 852.3 854.3 855.8 858.6 859.0 861.7 856.2 MAX. QFE PRESSURE IN HPA 868.5 862.6 860.7 862.0 861.8 858.2 855.4 861.2 860.4 862.4 865.0 866.8 868.5 DAY 2 11 18 10 28 16 19 20 28 13 3 5 MIN. QFE PRESSURE IN HPA 847.8 842.8 847.2 845.8 848.6 844.2 848.7 851.2 851.7 854.4 852.0 852.4 842.8 DAY 9 20 21 8 20 25 14 6 22 12 26 15 MEAN QNH PRESSURE IN HPA 1022.2 1019.2 1018.0 1018.9 1018.8 1016.2 1015.4 1017.6 1019.3 1022.6 1023.1 1026.2 1019.8 MAX. QNH PRESSURE IN HPA 1034.0 1027.2 1025.0 1026.5 1026.3 1022.1 1018.9 1025.6 1024.7 1027.0 1030.0 1032.1 1034.0 DAY 2 11 18 10 28 16 19 20 28 13 3 5 MIN. QNH PRESSURE IN HPA 1010.2 1004.4 1009.5 1007.9 1011.1 1006.0 1011.2 1014.1 1014.7 1017.8 1015.0 1015.5 1004.4 DAY 9 20 21 8 20 25 14 6 22 12 26 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1027.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1035.4 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.1 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 857.8 855.2 854.2 854.9 854.6 852.3 851.4 853.3 854.8 857.7 858.3 861.0 855.5 MAX. QFE PRESSURE IN HPA 867.4 861.4 860.7 861.1 861.6 857.2 854.7 860.0 859.4 861.4 863.7 866.2 867.4 DAY 2 11 18 10 28 16 18 20 28 7 3 5 MIN. QFE PRESSURE IN HPA 847.4 841.5 847.5 845.5 850.2 844.2 847.6 850.3 851.1 853.9 851.4 850.6 841.5 DAY 9 20 21 8 4 25 21 6 12 10 25 15 MEAN QNH PRESSURE IN HPA 1021.7 1018.7 1017.5 1018.4 1018.0 1015.3 1014.3 1016.5 1018.2 1021.6 1022.3 1025.3 1019.0 MAX. QNH PRESSURE IN HPA 1032.7 1025.8 1025.0 1025.5 1026.1 1021.0 1018.1 1024.2 1023.5 1025.8 1028.5 1031.4 1032.7 DAY 2 11 18 10 28 16 18 20 28 7 3 5 MIN. QNH PRESSURE IN HPA 1009.7 1002.9 1009.8 1007.5 1012.9 1006.0 1009.9 1013.0 1014.0 1017.2 1014.3 1013.4 1002.9 DAY 9 20 21 8 4 25 21 6 12 10 25 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1033.5 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.8 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 856.7 853.8 853.0 853.9 853.8 851.3 850.1 852.0 853.6 856.6 857.3 859.8 854.3 MAX. QFE PRESSURE IN HPA 865.9 859.3 859.5 859.8 861.0 856.2 853.5 858.0 858.2 860.2 862.6 864.6 865.9 DAY 2 11 18 10 28 16 18 20 30 13 3 5 MIN. QFE PRESSURE IN HPA 846.8 840.1 846.4 846.6 849.2 843.7 845.5 849.3 850.0 853.0 851.2 850.7 840.1 DAY 9 20 26 8 19 24 21 6 12 31 25 15 MEAN QNH PRESSURE IN HPA 1020.5 1017.0 1016.1 1017.2 1017.1 1014.2 1012.8 1015.0 1016.8 1020.3 1021.1 1024.0 1017.7 MAX. QNH PRESSURE IN HPA 1031.0 1023.4 1023.6 1024.0 1025.4 1019.8 1016.7 1021.9 1022.1 1024.5 1027.2 1029.5 1031.0 DAY 2 11 18 10 28 16 18 20 30 13 3 5 MIN. QNH PRESSURE IN HPA 1009.0 1001.3 1008.5 1008.8 1011.8 1005.4 1007.5 1011.9 1012.7 1016.2 1014.1 1013.5 1001.3 DAY 9 20 26 8 19 24 21 6 12 31 25 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1032.0 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.1 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 857.0 853.8 853.1 853.7 853.5 850.9 849.6 851.8 853.6 856.7 857.7 860.2 854.3 MAX. QFE PRESSURE IN HPA 865.5 859.5 859.5 859.3 861.0 856.2 852.6 857.6 858.2 861.0 863.1 864.9 865.5 DAY 2 12 18 10 28 16 9 19 30 6 30 5 MIN. QFE PRESSURE IN HPA 848.9 840.7 847.5 847.6 847.3 843.5 845.3 848.7 850.0 853.7 851.2 851.0 840.7 DAY 9 20 20 1 13 24 21 13 12 31 25 15 MEAN QNH PRESSURE IN HPA 1020.7 1017.1 1016.3 1017.0 1016.7 1013.7 1012.2 1014.8 1016.8 1020.4 1021.6 1024.4 1017.6 MAX. QNH PRESSURE IN HPA 1030.6 1023.6 1023.6 1023.4 1025.4 1019.8 1015.7 1021.5 1022.1 1025.4 1027.8 1029.9 1030.6 DAY 2 12 18 10 28 16 9 19 30 6 30 5 MIN. QNH PRESSURE IN HPA 1011.4 1002.0 1009.8 1009.9 1009.6 1005.2 1007.3 1011.2 1012.7 1017.0 1014.1 1013.8 1002.0 DAY 9 20 20 1 13 24 21 13 12 31 25 15 MEAN QFF PRESSURE IN HPA 1024.1 1018.6 1016.4 1013.2 1009.5 1003.2 1000.4 1002.4 1008.0 1014.6 1021.0 1026.0 1013.1 MAX. QFF PRESSURE IN HPA 1035.0 1025.7 1025.7 1022.0 1016.7 1010.1 1004.6 1009.6 1016.0 1021.8 1032.5 1033.2 1035.0 DAY 2 11 18 10 28 16 17 20 27 26 30 5 MIN. QFF PRESSURE IN HPA 1014.2 1004.7 1008.9 1004.8 1002.7 993.6 993.3 998.5 1003.0 1009.3 1011.6 1015.8 993.3 DAY 9 20 20 13 19 24 21 3 15 10 25 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 860.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 865.6 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 850.8 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 15 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1030.7 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.6 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1034.3 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.6 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 860.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 865.3 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 852.5 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 13 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1030.3 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.6 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1032.9 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 5 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.9 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.3 -1.0 5.6 14.8 19.2 23.1 29.9 28.1 23.1 14.4 7.3 3.1 13.9 MINIMUN AIR TEMPERATURE (C) -4.9 -4.7 -0.3 7.7 10.3 13.8 19.9 18.6 13.9 7.6 2.0 -0.4 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 10 4 0 0 0 0 14 DAYS WITH MINIMUM TEMP. <=-4 15 16 7 0 0 0 0 0 0 0 0 4 42 DAYS WITH FREEZING MIN.<= 0 26 24 16 2 0 0 0 0 0 0 7 17 92 TEMPERATURE RECORDS LOWEST(C) -19.6 -14.4 -6.4 -1.0 5.4 8.8 16.0 12.0 10.0 2.2 -1.6 -6.0 -19.6 DAY 18 1 16 2 1 14 1 30 29 29 29 27 MAXIMUM AIR TEMPERATURE (C) 2.7 3.7 10.0 19.1 23.7 29.5 34.7 33.3 28.6 19.0 11.2 6.4 18.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 16 31 30 11 0 0 0 88 DAYS WITH MAXIMUM TEMP. <= 0 8 6 0 0 0 0 0 0 0 0 0 0 14 TEMPERATURE RECORDS HIGHEST(C) 17.4 12.0 18.0 24.6 28.6 34.8 37.6 38.0 34.4 25.2 16.8 11.8 38.0 DAY 2 24 31 14 25 30 16 2 9 11 12 1 DIF. BETWEEN (MAX.-MIN.) (C) 7.6 8.4 10.3 11.4 13.4 15.7 14.8 14.7 14.7 11.4 9.2 6.8 11.5 MEAN DAILY TEMP. (MDT) (C) -1.1 -0.5 4.9 13.4 17.0 21.7 27.3 25.9 21.3 13.3 6.6 3.0 12.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 35.3 195.7 152.9 23.2 0.0 0.0 0.0 407.1 HEATING DEG. DAYS(BASE 18 0C) 593.5 537.0 407.2 139.9 42.5 2.3 0.0 0.0 1.5 145.9 342.4 464.4 2676.6 DEWPOINT (MEAN C) -7.1 -9.0 -5.1 1.8 3.3 3.1 5.2 3.1 1.4 1.8 -0.6 -2.0 -0.3 MIXING RATIO (G/KG) 2.80 2.40 3.25 5.27 5.83 5.84 6.82 6.03 5.22 5.23 4.39 3.93 4.75 VAPOUR PRESSURE (HPA) 3.83 3.29 4.43 7.18 7.93 7.92 9.24 8.18 7.10 7.14 6.02 5.38 6.47 SATURATION DEF. (HPA) 2.11 2.76 5.19 10.35 15.17 21.73 34.29 31.42 22.49 10.03 4.54 2.43 13.54 RELATIVE HUMIDITY (MEAN %) 69 59 51 45 38 31 24 23 28 47 61 71 46 RELATIVE HUMIDITY (MAX. %) 88 78 70 67 60 49 41 39 47 68 79 87 64 RELATIVE HUMIDITY (MIN. %) 47 43 36 29 25 17 15 13 17 34 46 57 32 RELATIVE HUMIDITY (MEAN% 03UTC) 76 72 68 64 59 47 40 39 45 66 77 81 61 RELATIVE HUMIDITY (MEAN% 09UTC) 62 50 45 40 32 23 20 19 22 40 54 65 39 RELATIVE HUMIDITY (MEAN% 15UTC) 63 53 45 38 28 20 15 15 22 42 57 72 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 118.1 54.0 98.6 95.2 10.1 0.0 1.0 0.0 3.1 41.0 42.0 114.1 577.2 DAYS WITH PRECIPITATION >=10 5 2 5 3 0 0 0 0 0 3 1 4 23 DAYS WITH PRECIPITATION >= 5 7 4 6 5 0 0 0 0 0 4 3 6 35 DAYS WITH PRECIPITATION >= 1 14 7 7 11 3 0 1 0 2 6 6 11 68 DAYS WITH PRECIPITATION 19 9 8 13 6 0 1 0 3 7 8 13 87 GREATEST DAILY PRECIPITATION 36.0 20.0 26.0 23.6 4.0 0.0 1.0 0.0 1.6 13.0 16.0 37.0 37.0 DAY 21 14 8 29 8 ** 15 ** 29 25 24 21 DAY WITH THUNDER STORM 0 0 1 3 0 0 0 0 1 1 1 0 7 DAYS WITH SNOW OR SLEET 18 6 6 0 0 0 0 0 0 0 1 8 39 DAYS WITH DUST 3 1 0 0 0 0 0 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 180 180 180 225 225 180 360 225 225 225 180 180 225 PREVAILING WIND SPEED(KNOTS) 11.3 10.4 9.4 12.1 11.0 8.9 6.5 10.2 9.8 9.2 7.2 8.0 11.0 PREVAILING WIND PERCENT 21.4 13.2 17.4 21.3 22.6 9.0 20.0 20.0 22.7 15.5 3.3 11.0 12.7 CALMS PERCENT OF WIND 62.9 60.4 53.5 49.3 47.7 70.0 58.1 49.7 54.7 65.8 88.7 66.5 60.9 NO. OF WIND OBSERVATION 248 182 155 150 155 210 155 155 150 155 150 155 2020 VECTOR WIND DIRECTION (MEAN) 188 188 208 198 208 194 12 252 235 227 188 175 205 VECTOR WIND MAGNITUDE(KNOTS) 3.7 2.8 3.4 4.3 4.2 1.2 1.7 1.5 2.0 1.4 0.3 1.5 1.9 WIND STEADINESES (MEAN %) 84.1 71.8 69.4 75.4 76.4 48.0 56.7 34.1 51.3 51.9 33.3 53.6 51.4 WIND SPEED (MEAN KNOTS) 4.4 3.9 4.9 5.7 5.5 2.5 3.0 4.4 3.9 2.7 0.9 2.8 3.7 FASTEST WIND DIRECTION 210 180 230 210 240 210 340 210 240 210 180 210 210 FASTEST WIND SPEED (KNOTS) 35 19 31 27 21 21 16 17 19 17 14 16 35 DAY 25 6 14 9 18 4 13 26 27 18 27 23 DAYS WITH SKY CLEAR (0-2)/8 9 16 14 9 18 27 25 31 27 17 16 12 221 DAYS WITH P.CLOUDY (3-6)/8 9 6 10 14 11 3 6 0 1 10 6 11 87 DAYS WITH CLOUDY (7-8)/8 13 7 7 7 2 0 0 0 2 4 8 8 58 DAYS WITH VISIBILITY =< 2 KM 8 2 1 0 0 0 0 0 0 0 0 1 12 DURATION OF SUNSHINE HOURS 98.2 174.5 224.8 224.8 312.4 369.0 338.3 350.9 294.9 227.5 155.8 132.2 2903.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 854.3 856.0 854.2 854.7 853.6 852.4 852.4 853.0 854.2 858.0 859.8 857.2 855.0 MAX. QFE PRESSURE IN HPA 864.6 863.9 862.0 861.2 858.0 859.2 859.3 858.3 859.2 862.7 867.2 864.7 867.2 DAY-HOUR 30-18 10- 9 27- 6 2- 6 22- 6 13- 6 30- 6 23- 6 23- 6 29- 6 17- 6 4- 6 MIN. QFE PRESSURE IN HPA 841.0 844.4 842.6 846.1 847.0 847.5 844.7 847.4 848.3 854.2 854.2 848.1 841.0 DAY-HOUR 21- 3 6-21 24- 9 9-12 19-15 24-15 10-15 30-12 2-15 25-12 30-15 21- 3 MEAN QNH PRESSURE IN HPA 1017.7 1019.6 1017.5 1018.1 1016.9 1015.4 1015.4 1016.2 1017.6 1021.9 1024.0 1021.0 1018.4 MAX. QNH PRESSURE IN HPA 1029.5 1028.7 1026.5 1025.6 1021.9 1023.3 1023.4 1022.3 1023.3 1027.3 1032.5 1029.6 1032.5 DAY-HOUR 30-18 10- 9 27- 6 2- 6 22- 6 13- 6 30- 6 23- 6 23- 6 29- 6 17- 6 4- 6 MIN. QNH PRESSURE IN HPA 1002.3 1006.2 1004.2 1008.2 1009.2 1009.8 1006.6 1009.7 1010.7 1017.5 1017.5 1010.5 1002.3 DAY-HOUR 21- 3 6-21 24- 9 9-12 19-15 24-15 10-15 30-12 2-15 25-12 30-15 21- 3 MEAN QFF PRESSURE IN HPA 1022.0 1025.1 ****** ****** ****** 1005.1 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1041.9 1037.2 ****** ****** ****** 1016.1 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 30-18 10-15 **-** **-** **-** 13- 6 **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1004.2 1007.8 ****** ****** ****** 999.4 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 21- 3 6-21 **-** **-** **-** 25-15 **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 854.4 ****** ****** ****** ****** 852.7 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 863.5 ****** ****** ****** ****** 857.6 ****** ****** ****** ****** ****** ****** ****** DAY 31 ** ** ** ** 13 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 841.8 ****** ****** ****** ****** 848.6 ****** ****** ****** ****** ****** ****** ****** DAY 21 ** ** ** ** 26 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1017.7 ****** ****** ****** ****** 1015.8 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.3 ****** ****** ****** ****** 1021.5 ****** ****** ****** ****** ****** ****** ****** DAY 31 ** ** ** ** 13 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1003.2 ****** ****** ****** ****** 1011.1 ****** ****** ****** ****** ****** ****** ****** DAY 21 ** ** ** ** 26 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1021.5 ****** ****** ****** ****** 1005.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1038.9 ****** ****** ****** ****** 1013.9 ****** ****** ****** ****** ****** ****** ****** DAY 31 ** ** ** ** 13 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1004.7 ****** ****** ****** ****** 1000.4 ****** ****** ****** ****** ****** ****** ****** DAY 21 ** ** ** ** 26 ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 854.0 855.6 854.2 854.9 854.1 853.1 853.3 854.0 854.8 858.3 860.0 857.0 855.3 MAX. QFE PRESSURE IN HPA 863.0 862.6 861.2 860.5 857.5 858.7 858.8 858.0 858.5 862.0 866.4 863.1 866.4 DAY 31 11 27 2 22 13 31 8 9 29 17 4 MIN. QFE PRESSURE IN HPA 841.0 847.0 843.9 848.1 850.6 849.0 848.2 849.6 850.2 854.5 856.3 848.1 841.0 DAY 21 7 24 10 20 26 11 31 3 24 22 21 MEAN QNH PRESSURE IN HPA 1017.4 1019.1 1017.6 1018.3 1017.5 1016.3 1016.5 1017.3 1018.3 1022.2 1024.2 1020.8 1018.8 MAX. QNH PRESSURE IN HPA 1027.7 1027.2 1025.6 1024.8 1021.3 1022.7 1022.8 1021.9 1022.5 1026.5 1031.6 1027.8 1031.6 DAY 31 11 27 2 22 13 31 8 9 29 17 4 MIN. QNH PRESSURE IN HPA 1002.3 1009.2 1005.7 1010.5 1013.4 1011.5 1010.6 1012.2 1012.9 1017.9 1020.0 1010.5 1002.3 DAY 21 7 24 10 20 26 11 31 3 24 22 21 MEAN QFF PRESSURE IN HPA 1022.0 1023.6 1018.6 1013.6 1010.3 1006.2 1003.3 1005.2 1009.3 1018.1 1024.1 1023.0 1014.8 MAX. QFF PRESSURE IN HPA 1039.5 1036.2 1028.3 1022.1 1016.6 1015.8 1009.2 1010.8 1014.1 1025.6 1032.6 1032.2 1039.5 DAY 31 10 1 2 11 13 31 8 29 29 17 29 MIN. QFF PRESSURE IN HPA 1004.2 1013.7 1004.6 1005.7 1005.1 1001.1 997.0 999.9 1003.2 1013.3 1016.9 1012.7 997.0 DAY 21 7 24 21 26 19 11 25 3 12 13 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 855.1 856.7 855.1 855.6 854.5 853.3 853.6 854.3 855.5 859.1 861.0 858.0 856.0 MAX. QFE PRESSURE IN HPA 864.3 863.5 862.0 861.2 858.0 859.2 859.3 858.3 859.2 862.7 867.2 864.7 867.2 DAY 30 29 27 2 22 13 30 23 23 29 17 4 MIN. QFE PRESSURE IN HPA 843.0 848.7 844.5 849.7 850.5 849.2 848.8 849.8 851.0 855.5 857.0 849.9 843.0 DAY 21 6 24 21 19 19 11 31 1 24 22 21 MEAN QNH PRESSURE IN HPA 1018.5 1020.4 1018.6 1019.1 1017.9 1016.6 1016.9 1017.6 1019.0 1023.2 1025.4 1022.0 1019.6 MAX. QNH PRESSURE IN HPA 1029.2 1028.3 1026.5 1025.6 1021.9 1023.3 1023.4 1022.3 1023.3 1027.3 1032.5 1029.6 1032.5 DAY 30 29 27 2 22 13 30 23 23 29 17 4 MIN. QNH PRESSURE IN HPA 1004.6 1011.2 1006.4 1012.3 1013.3 1011.8 1011.3 1012.5 1013.8 1019.0 1020.8 1012.6 1004.6 DAY 21 6 24 21 19 19 11 31 1 24 22 21 MEAN QFF PRESSURE IN HPA 1023.3 ****** ****** ****** ****** 1006.1 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1041.6 ****** ****** ****** ****** 1016.1 ****** ****** ****** ****** ****** ****** ****** DAY 31 ** ** ** ** 13 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1008.0 ****** ****** ****** ****** 1000.2 ****** ****** ****** ****** ****** ****** ****** DAY 21 ** ** ** ** 26 ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 854.5 856.4 854.7 855.0 854.0 852.5 852.7 853.2 854.5 858.1 860.1 857.5 855.3 MAX. QFE PRESSURE IN HPA 864.5 863.9 860.9 860.2 857.9 858.4 858.8 857.5 857.8 861.3 865.2 863.5 865.2 DAY 30 10 3 2 6 13 30 8 25 3 17 4 MIN. QFE PRESSURE IN HPA 843.3 847.4 842.6 848.5 848.1 848.6 847.4 848.2 850.0 855.0 856.0 850.8 842.6 DAY 21 6 24 9 19 26 10 30 2 24 22 21 MEAN QNH PRESSURE IN HPA 1017.9 1020.1 1018.1 1018.5 1017.3 1015.6 1015.8 1016.4 1017.9 1022.0 1024.3 1021.3 1018.8 MAX. QNH PRESSURE IN HPA 1029.4 1028.7 1025.3 1024.5 1021.8 1022.4 1022.8 1021.3 1021.7 1025.7 1030.2 1028.3 1030.2 DAY 30 10 3 2 6 13 30 8 25 3 17 4 MIN. QNH PRESSURE IN HPA 1005.0 1009.7 1004.2 1011.0 1010.5 1011.1 1009.7 1010.6 1012.7 1018.5 1019.6 1013.6 1004.2 DAY 21 6 24 9 19 26 10 30 2 24 22 21 MEAN QFF PRESSURE IN HPA 1021.9 ****** ****** ****** ****** 1005.3 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1040.0 ****** ****** ****** ****** 1014.9 ****** ****** ****** ****** ****** ****** ****** DAY 31 ** ** ** ** 13 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1008.1 ****** ****** ****** ****** 999.7 ****** ****** ****** ****** ****** ****** ****** DAY 19 ** ** ** ** 26 ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 853.5 855.2 853.4 854.0 853.0 851.4 851.3 852.0 853.2 857.1 859.0 856.7 854.2 MAX. QFE PRESSURE IN HPA 863.7 863.0 859.5 858.1 857.6 857.5 857.5 856.4 856.2 861.2 863.9 862.5 863.9 DAY 30 10 3 2 6 13 30 8 29 15 16 4 MIN. QFE PRESSURE IN HPA 843.3 845.3 842.7 846.1 847.3 848.0 845.4 847.4 848.5 854.2 854.8 850.4 842.7 DAY 21 6 24 9 19 26 10 30 2 25 22 20 MEAN QNH PRESSURE IN HPA 1016.7 1018.7 1016.6 1017.3 1016.2 1014.4 1014.2 1015.0 1016.4 1020.9 1023.0 1020.4 1017.5 MAX. QNH PRESSURE IN HPA 1028.5 1027.7 1023.6 1022.0 1021.5 1021.3 1021.3 1020.1 1019.8 1025.6 1028.7 1027.1 1028.7 DAY 30 10 3 2 6 13 30 8 29 15 16 4 MIN. QNH PRESSURE IN HPA 1005.0 1007.3 1004.3 1008.2 1009.6 1010.4 1007.4 1009.7 1011.0 1017.5 1018.2 1013.2 1004.3 DAY 21 6 24 9 19 26 10 30 2 25 22 20 MEAN QFF PRESSURE IN HPA 1020.6 ****** ****** ****** ****** 1004.1 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1038.7 ****** ****** ****** ****** 1014.3 ****** ****** ****** ****** ****** ****** ****** DAY 30 ** ** ** ** 13 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1008.8 ****** ****** ****** ****** 999.5 ****** ****** ****** ****** ****** ****** ****** DAY 21 ** ** ** ** 28 ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 854.0 855.4 853.6 854.1 852.6 851.1 850.9 851.7 853.2 857.3 859.2 857.1 854.2 MAX. QFE PRESSURE IN HPA 864.0 863.3 859.5 858.0 855.9 856.7 856.7 856.0 856.4 861.5 864.5 862.6 864.5 DAY 30 10 26 12 12 13 30 8 28 15 16 4 MIN. QFE PRESSURE IN HPA 844.6 844.7 843.6 847.5 847.0 847.5 844.7 847.4 848.3 854.3 854.2 850.4 843.6 DAY 20 6 24 9 19 24 10 30 2 24 30 20 MEAN QNH PRESSURE IN HPA 1017.3 1018.9 1016.9 1017.4 1015.7 1014.0 1013.7 1014.6 1016.4 1021.1 1023.3 1020.8 1017.5 MAX. QNH PRESSURE IN HPA 1028.8 1028.0 1023.6 1021.9 1019.5 1020.4 1020.4 1019.6 1020.1 1026.0 1029.4 1027.2 1029.4 DAY 30 10 26 12 12 13 30 8 28 15 16 4 MIN. QNH PRESSURE IN HPA 1006.5 1006.6 1005.3 1009.8 1009.2 1009.8 1006.6 1009.7 1010.7 1017.7 1017.5 1013.2 1005.3 DAY 20 6 24 9 19 24 10 30 2 24 30 20 MEAN QFF PRESSURE IN HPA 1022.0 1023.2 1017.7 1012.6 1008.5 1003.9 1000.6 1002.7 1007.5 1017.0 1023.3 1023.0 1013.5 MAX. QFF PRESSURE IN HPA 1039.3 1037.2 1027.5 1018.6 1014.2 1013.8 1007.0 1008.5 1013.7 1023.2 1030.0 1031.7 1039.3 DAY 30 10 3 1 2 13 30 8 29 15 16 28 MIN. QFF PRESSURE IN HPA 1008.2 1009.0 1006.6 1003.7 1001.8 999.4 993.6 998.6 1001.0 1012.9 1016.8 1014.5 993.6 DAY 20 6 24 14 19 25 10 3 2 13 13 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 854.7 ****** ****** ****** ****** 852.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 864.6 ****** ****** ****** ****** 857.2 ****** ****** ****** ****** ****** ****** ****** DAY 30 ** ** ** ** 13 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 845.3 ****** ****** ****** ****** 848.7 ****** ****** ****** ****** ****** ****** ****** DAY 20 ** ** ** ** 25 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1018.1 ****** ****** ****** ****** 1015.5 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.5 ****** ****** ****** ****** 1021.0 ****** ****** ****** ****** ****** ****** ****** DAY 30 ** ** ** ** 13 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1007.3 ****** ****** ****** ****** 1011.2 ****** ****** ****** ****** ****** ****** ****** DAY 20 ** ** ** ** 25 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1022.9 ****** ****** ****** ****** 1004.9 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1041.9 ****** ****** ****** ****** 1014.9 ****** ****** ****** ****** ****** ****** ****** DAY 30 ** ** ** ** 13 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1009.3 ****** ****** ****** ****** 999.9 ****** ****** ****** ****** ****** ****** ****** DAY 20 ** ** ** ** 27 ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 854.5 ****** ****** ****** ****** 852.8 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 864.6 ****** ****** ****** ****** 857.3 ****** ****** ****** ****** ****** ****** ****** DAY 30 ** ** ** ** 12 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 844.3 ****** ****** ****** ****** 848.7 ****** ****** ****** ****** ****** ****** ****** DAY 20 ** ** ** ** 25 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1017.8 ****** ****** ****** ****** 1015.9 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.5 ****** ****** ****** ****** 1021.1 ****** ****** ****** ****** ****** ****** ****** DAY 30 ** ** ** ** 12 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1006.1 ****** ****** ****** ****** 1011.2 ****** ****** ****** ****** ****** ****** ****** DAY 20 ** ** ** ** 25 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1022.1 ****** ****** ****** ****** 1005.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1040.2 ****** ****** ****** ****** 1014.4 ****** ****** ****** ****** ****** ****** ****** DAY 30 ** ** ** ** 13 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1008.1 ****** ****** ****** ****** 1000.7 ****** ****** ****** ****** ****** ****** ****** DAY 20 ** ** ** ** 25 ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.0 2.8 10.9 14.7 18.1 24.7 27.7 28.7 23.9 16.4 7.6 4.7 15.1 MINIMUN AIR TEMPERATURE (C) -3.0 -1.1 4.4 7.5 9.6 14.5 19.6 19.1 14.8 9.4 2.0 1.4 8.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 11 7 0 0 0 0 18 DAYS WITH MINIMUM TEMP. <=-4 9 7 0 0 0 0 0 0 0 0 4 3 23 DAYS WITH FREEZING MIN.<= 0 22 15 5 0 0 0 0 0 0 0 10 6 58 TEMPERATURE RECORDS LOWEST(C) -15.4 -11.0 -1.0 3.0 5.0 10.0 13.0 14.0 11.4 3.8 -16.4 -7.4 -16.4 DAY 30 1 12 13 6 1 19 23 15 27 20 22 MAXIMUM AIR TEMPERATURE (C) 4.4 6.1 15.5 19.0 22.5 29.5 32.3 34.0 29.3 21.3 11.9 7.4 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 13 28 27 15 0 0 0 83 DAYS WITH MAXIMUM TEMP. <= 0 7 1 0 0 0 0 0 0 0 0 2 0 10 TEMPERATURE RECORDS HIGHEST(C) 11.6 13.4 23.6 24.4 28.0 35.2 37.2 38.0 32.4 28.6 21.4 12.6 38.0 DAY 10 28 28 30 28 22 28 1 2 5 4 31 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 7.2 11.1 11.5 12.9 15.0 12.7 14.9 14.5 11.9 9.9 6.0 11.2 MEAN DAILY TEMP. (MDT) (C) 0.7 2.5 9.9 13.2 16.0 22.0 26.0 26.6 22.1 15.3 7.0 4.4 13.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 43.6 154.9 172.5 36.3 0.0 0.0 0.0 407.3 HEATING DEG. DAYS(BASE 18 0C) 536.2 433.8 250.4 144.4 67.8 0.5 0.0 0.0 0.0 92.4 331.4 420.2 2277.1 DEWPOINT (MEAN C) -5.0 -3.9 -0.0 2.0 2.8 3.0 8.5 5.0 2.6 1.7 -1.7 -1.8 1.1 MIXING RATIO (G/KG) 3.19 3.44 4.57 5.28 5.64 5.75 8.36 6.69 5.54 5.18 4.20 4.12 5.16 VAPOUR PRESSURE (HPA) 4.37 4.71 6.23 7.20 7.66 7.81 11.29 9.07 7.55 7.08 5.74 5.64 7.03 SATURATION DEF. (HPA) 2.56 3.00 7.48 10.26 14.04 24.79 27.13 31.97 23.36 12.59 5.52 3.08 13.82 RELATIVE HUMIDITY (MEAN %) 67 64 51 46 40 27 33 25 28 41 56 67 45 RELATIVE HUMIDITY (MAX. %) 81 79 74 69 61 45 50 43 45 60 73 76 63 RELATIVE HUMIDITY (MIN. %) 54 50 36 31 26 17 22 15 18 28 41 57 33 RELATIVE HUMIDITY (MEAN% 03UTC) 79 71 72 66 60 44 50 42 45 57 68 72 61 RELATIVE HUMIDITY (MEAN% 09UTC) 63 61 43 37 33 22 28 20 22 34 48 62 39 RELATIVE HUMIDITY (MEAN% 15UTC) 65 65 46 40 33 19 23 17 22 37 54 67 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.8 76.2 71.2 36.2 35.0 0.0 8.0 0.0 0.0 17.4 63.6 121.3 461.7 DAYS WITH PRECIPITATION >=10 1 4 2 1 1 0 0 0 0 0 2 4 15 DAYS WITH PRECIPITATION >= 5 2 5 2 3 1 0 1 0 0 2 2 7 25 DAYS WITH PRECIPITATION >= 1 5 6 7 6 2 0 2 0 0 4 7 12 51 DAYS WITH PRECIPITATION 5 7 8 7 5 0 2 0 0 9 9 13 65 GREATEST DAILY PRECIPITATION 13.0 19.0 36.0 13.0 31.0 0.0 6.0 0.0 0.0 5.0 41.0 35.0 41.0 DAY 26 15 9 6 3 ** 19 ** ** 1 18 30 DAY WITH THUNDER STORM 0 0 1 3 2 0 0 0 0 0 1 1 8 DAYS WITH SNOW OR SLEET 3 7 0 0 0 0 0 0 0 0 2 6 18 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 225 225 225 225 225 45 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 10.0 11.4 10.4 10.5 10.4 9.3 7.2 10.7 9.3 10.0 10.6 10.2 10.2 PREVAILING WIND PERCENT 5.8 18.6 25.2 33.3 29.0 20.0 13.5 23.2 29.3 27.1 15.3 22.6 20.9 CALMS PERCENT OF WIND 76.8 52.1 46.5 40.0 40.6 49.3 61.3 43.2 42.7 41.3 53.3 43.9 49.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 175 194 205 212 202 272 6 239 217 213 189 193 209 VECTOR WIND MAGNITUDE(KNOTS) 0.8 3.1 3.4 4.6 3.9 1.2 1.5 2.7 2.9 3.0 3.1 3.8 2.5 WIND STEADINESES (MEAN %) 42.1 72.1 70.8 80.7 68.4 27.9 55.6 54.0 59.2 57.7 72.1 74.5 55.6 WIND SPEED (MEAN KNOTS) 1.9 4.3 4.8 5.7 5.7 4.3 2.7 5.0 4.9 5.2 4.3 5.1 4.5 FASTEST WIND DIRECTION 180 220 240 240 180 210 240 240 150 210 120 240 240 FASTEST WIND SPEED (KNOTS) 19 19 21 23 19 17 12 16 17 17 23 21 23 DAY 15 19 3 12 28 17 9 6 28 13 21 30 DAYS WITH SKY CLEAR (0-2)/8 14 10 14 12 18 29 28 31 27 18 10 7 218 DAYS WITH P.CLOUDY (3-6)/8 8 8 10 13 10 1 3 0 3 12 14 11 93 DAYS WITH CLOUDY (7-8)/8 9 10 7 5 3 0 0 0 0 1 6 13 54 DAYS WITH VISIBILITY =< 2 KM 1 5 0 0 0 0 0 0 0 0 1 1 8 DURATION OF SUNSHINE HOURS 143.2 136.9 223.3 247.3 302.4 384.2 353.5 362.1 311.3 254.3 155.2 106.6 2980.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 858.5 855.2 855.0 854.6 852.6 852.0 851.7 853.5 855.4 857.7 857.8 857.7 855.2 MAX. QFE PRESSURE IN HPA 864.0 864.0 864.2 863.3 858.1 859.0 856.5 858.8 861.0 864.8 865.0 865.6 865.6 DAY-HOUR 30- 9 12- 6 1- 6 1- 6 18- 6 2- 6 29- 6 5- 6 24- 6 9- 6 2- 6 9-15 MIN. QFE PRESSURE IN HPA 853.6 838.4 842.3 849.4 844.8 843.2 846.8 847.2 850.3 850.6 841.9 848.3 838.4 DAY-HOUR 19-12 21- 3 25- 3 12-15 29-15 17-15 17-15 29-12 5-15 25-15 18- 3 5- 3 MEAN QNH PRESSURE IN HPA 1022.5 1018.7 1018.4 1018.0 1015.7 1015.0 1014.6 1016.7 1019.0 1021.6 1021.7 1021.6 1018.6 MAX. QNH PRESSURE IN HPA 1028.8 1028.8 1029.1 1028.0 1022.0 1023.1 1020.2 1022.8 1025.4 1029.8 1030.0 1030.7 1030.7 DAY-HOUR 30- 9 12- 6 1- 6 1- 6 18- 6 2- 6 29- 6 5- 6 24- 6 9- 6 2- 6 9-15 MIN. QNH PRESSURE IN HPA 1016.8 999.3 1003.8 1012.0 1006.7 1004.9 1009.0 1009.5 1013.0 1013.4 1003.4 1010.7 999.3 DAY-HOUR 19-12 21- 3 25- 3 12-15 29-15 17-15 17-15 29-12 5-15 25-15 18- 3 5- 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 858.4 854.9 855.1 855.0 853.1 852.9 852.8 854.3 856.1 857.9 857.8 857.6 855.5 MAX. QFE PRESSURE IN HPA 862.4 863.2 863.0 862.6 857.4 858.8 856.3 858.4 860.0 864.0 864.5 864.1 864.5 DAY 9 12 1 2 18 2 28 5 24 10 2 10 MIN. QFE PRESSURE IN HPA 854.0 838.4 842.3 849.7 846.1 845.5 849.3 849.3 852.1 852.1 841.9 848.3 838.4 DAY 19 21 25 12 3 17 10 30 5 26 18 5 MEAN QNH PRESSURE IN HPA 1022.3 1018.4 1018.6 1018.5 1016.3 1016.0 1015.9 1017.7 1019.7 1021.7 1021.7 1021.5 1019.0 MAX. QNH PRESSURE IN HPA 1027.0 1027.9 1027.7 1027.2 1021.2 1022.8 1020.0 1022.4 1024.2 1028.8 1029.4 1028.9 1029.4 DAY 9 12 1 2 18 2 28 5 24 10 2 10 MIN. QNH PRESSURE IN HPA 1017.3 999.3 1003.8 1012.3 1008.2 1007.5 1011.9 1011.9 1015.1 1015.1 1003.4 1010.7 999.3 DAY 19 21 25 12 3 17 10 30 5 26 18 5 MEAN QFF PRESSURE IN HPA 1026.1 1020.7 1016.4 1014.0 1009.8 1005.8 1003.5 1005.2 1010.3 1016.3 1021.4 1022.6 1014.3 MAX. QFF PRESSURE IN HPA 1038.6 1030.8 1027.8 1021.5 1015.6 1014.8 1008.1 1010.8 1015.5 1024.0 1038.4 1033.0 1038.6 DAY 30 12 1 2 18 2 22 12 24 28 20 22 MIN. QFF PRESSURE IN HPA 1018.8 1001.2 1001.8 1008.2 1002.6 996.5 999.2 998.9 1004.1 1008.2 1003.4 1010.8 996.5 DAY 19 21 24 12 8 17 11 30 5 6 18 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 859.4 856.0 855.9 855.6 853.5 853.1 853.0 854.7 856.6 858.8 858.8 858.5 856.2 MAX. QFE PRESSURE IN HPA 863.7 864.0 864.2 863.3 858.1 859.0 856.5 858.8 861.0 864.8 865.0 864.9 865.0 DAY 30 12 1 1 18 2 29 5 24 9 2 9 MIN. QFE PRESSURE IN HPA 854.2 840.0 842.9 850.4 846.7 845.5 849.4 850.1 852.3 854.2 843.8 849.7 840.0 DAY 19 21 25 12 3 17 9 30 5 6 18 5 MEAN QNH PRESSURE IN HPA 1023.6 1019.7 1019.5 1019.1 1016.7 1016.3 1016.1 1018.1 1020.3 1022.8 1022.9 1022.5 1019.8 MAX. QNH PRESSURE IN HPA 1028.5 1028.8 1029.1 1028.0 1022.0 1023.1 1020.2 1022.8 1025.4 1029.8 1030.0 1029.9 1030.0 DAY 30 12 1 1 18 2 29 5 24 9 2 9 MIN. QNH PRESSURE IN HPA 1017.5 1001.2 1004.5 1013.2 1008.9 1007.5 1012.0 1012.8 1015.3 1017.5 1005.6 1012.3 1001.2 DAY 19 21 25 12 3 17 9 30 5 6 18 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 859.1 855.8 855.5 855.0 852.9 852.3 852.0 853.8 855.7 858.0 858.0 857.9 855.5 MAX. QFE PRESSURE IN HPA 864.0 863.4 863.4 862.9 857.6 857.9 855.9 858.1 859.6 864.0 863.9 864.8 864.8 DAY 30 11 1 1 18 2 29 5 24 9 14 9 MIN. QFE PRESSURE IN HPA 854.0 840.7 842.8 850.0 846.6 844.7 848.2 848.8 851.2 852.6 844.7 850.1 840.7 DAY 19 21 25 12 29 17 9 29 5 25 18 5 MEAN QNH PRESSURE IN HPA 1023.1 1019.4 1019.0 1018.4 1016.0 1015.4 1015.0 1017.1 1019.2 1021.9 1021.9 1021.8 1019.0 MAX. QNH PRESSURE IN HPA 1028.8 1028.1 1028.1 1027.6 1021.5 1021.8 1019.5 1022.0 1023.8 1028.8 1028.7 1029.8 1029.8 DAY 30 11 1 1 18 2 29 5 24 9 14 9 MIN. QNH PRESSURE IN HPA 1017.3 1002.0 1004.4 1012.7 1008.8 1006.6 1010.6 1011.3 1014.1 1015.7 1006.6 1012.8 1002.0 DAY 19 21 25 12 29 17 9 29 5 25 18 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 857.9 854.7 854.1 854.0 851.9 851.1 850.6 852.4 854.4 856.9 857.1 857.1 854.4 MAX. QFE PRESSURE IN HPA 862.5 862.2 861.7 862.0 856.0 856.8 854.1 856.2 857.4 862.0 862.3 864.6 864.6 DAY 30 10 1 1 18 1 29 5 24 9 14 9 MIN. QFE PRESSURE IN HPA 853.6 840.7 842.6 850.0 845.0 844.3 847.2 847.2 850.6 851.0 845.8 850.0 840.7 DAY 19 21 25 12 29 17 10 29 5 25 17 19 MEAN QNH PRESSURE IN HPA 1021.8 1018.1 1017.5 1017.3 1014.9 1014.0 1013.4 1015.5 1017.8 1020.7 1020.9 1020.9 1017.7 MAX. QNH PRESSURE IN HPA 1027.1 1026.8 1026.2 1026.5 1019.6 1020.5 1017.4 1019.8 1021.2 1026.5 1026.9 1029.5 1029.5 DAY 30 10 1 1 18 1 29 5 24 9 14 9 MIN. QNH PRESSURE IN HPA 1016.8 1002.0 1004.2 1012.7 1006.9 1006.1 1009.5 1009.5 1013.4 1013.8 1007.9 1012.7 1002.0 DAY 19 21 25 12 29 17 10 29 5 25 17 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 858.0 854.8 854.3 853.7 851.8 850.7 850.0 852.3 854.4 857.1 857.3 857.5 854.3 MAX. QFE PRESSURE IN HPA 863.0 862.4 861.2 862.0 856.5 856.0 853.4 856.0 857.6 862.2 862.8 865.6 865.6 DAY 30 9 1 1 13 1 15 11 23 9 14 9 MIN. QFE PRESSURE IN HPA 854.2 843.2 843.9 849.4 844.8 843.2 846.8 847.4 850.3 850.6 844.9 849.6 843.2 DAY 19 21 25 12 29 17 17 29 5 25 17 4 MEAN QNH PRESSURE IN HPA 1021.9 1018.2 1017.6 1016.9 1014.8 1013.6 1012.7 1015.3 1017.8 1020.8 1021.1 1021.3 1017.7 MAX. QNH PRESSURE IN HPA 1027.7 1027.0 1025.6 1026.5 1020.2 1019.6 1016.6 1019.6 1021.5 1026.8 1027.4 1030.7 1030.7 DAY 30 9 1 1 13 1 15 11 23 9 14 9 MIN. QNH PRESSURE IN HPA 1017.5 1004.9 1005.7 1012.0 1006.7 1004.9 1009.0 1009.7 1013.0 1013.4 1006.8 1012.2 1004.9 DAY 19 21 25 12 29 17 17 29 5 25 17 4 MEAN QFF PRESSURE IN HPA 1025.7 1020.3 1015.3 1012.4 1008.3 1003.3 1000.3 1003.0 1008.4 1015.5 1020.8 1022.4 1013.0 MAX. QFF PRESSURE IN HPA 1038.1 1030.0 1025.1 1019.4 1013.4 1011.5 1004.5 1008.0 1012.4 1023.9 1035.9 1033.6 1038.1 DAY 30 9 1 1 5 1 21 11 19 27 20 9 MIN. QFF PRESSURE IN HPA 1019.6 1005.6 1002.2 1007.8 999.6 994.8 996.5 998.6 1002.2 1007.4 1004.5 1011.1 994.8 DAY 18 20 23 25 29 17 11 29 5 25 17 19 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.0 3.0 8.9 11.4 17.6 23.9 27.2 26.8 24.3 18.4 9.2 -1.0 14.1 MINIMUN AIR TEMPERATURE (C) -5.2 -2.0 2.8 6.9 9.3 14.5 17.8 17.1 13.6 10.7 3.4 -4.6 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 3 1 0 1 0 0 6 DAYS WITH MINIMUM TEMP. <=-4 19 10 1 0 0 0 0 0 0 0 0 14 44 DAYS WITH FREEZING MIN.<= 0 25 19 8 0 0 0 0 0 0 0 3 23 78 TEMPERATURE RECORDS LOWEST(C) -17.4 -9.0 -4.2 2.6 4.8 7.6 15.0 13.2 11.4 5.0 -2.0 -17.6 -17.6 DAY 25 5 1 22 5 4 5 23 17 23 30 27 MAXIMUM AIR TEMPERATURE (C) 2.5 7.0 13.5 14.7 22.2 28.3 31.8 32.2 30.4 24.0 13.8 2.0 18.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 9 26 30 19 0 0 0 84 DAYS WITH MAXIMUM TEMP. <= 0 10 0 0 0 0 0 0 0 0 0 0 13 23 TEMPERATURE RECORDS HIGHEST(C) 10.4 13.4 20.0 20.0 29.4 33.0 34.8 36.4 34.2 29.8 19.0 11.8 36.4 DAY 1 22 11 29 28 27 23 14 3 1 9 6 DIF. BETWEEN (MAX.-MIN.) (C) 7.7 9.0 10.7 7.8 12.9 13.8 14.0 15.1 16.8 13.3 10.4 6.6 11.5 MEAN DAILY TEMP. (MDT) (C) -1.4 2.5 8.1 10.8 15.7 21.4 24.8 24.6 22.0 17.3 8.6 -1.3 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 33.3 117.7 112.8 32.5 5.8 0.0 0.0 302.1 HEATING DEG. DAYS(BASE 18 0C) 600.8 434.6 305.5 216.8 80.7 0.7 0.0 0.0 0.0 50.1 283.0 599.1 2571.3 DEWPOINT (MEAN C) -6.5 -5.5 -2.5 2.6 4.0 3.2 7.1 5.3 1.1 3.6 -0.8 -5.5 0.5 MIXING RATIO (G/KG) 2.94 3.13 3.88 5.55 6.10 5.88 7.63 6.85 4.93 5.86 4.35 3.23 5.03 VAPOUR PRESSURE (HPA) 4.02 4.29 5.28 7.53 8.28 7.98 10.34 9.27 6.74 8.01 5.97 4.41 6.84 SATURATION DEF. (HPA) 2.01 3.58 6.76 6.30 12.83 22.72 26.88 27.43 25.30 14.29 6.24 1.66 13.00 RELATIVE HUMIDITY (MEAN %) 69 57 50 58 45 29 31 28 24 42 54 74 47 RELATIVE HUMIDITY (MAX. %) 84 73 68 74 69 47 50 46 44 64 73 87 65 RELATIVE HUMIDITY (MIN. %) 54 44 36 45 29 18 19 18 14 27 39 59 34 RELATIVE HUMIDITY (MEAN% 03UTC) 78 67 67 70 68 47 50 46 44 62 70 80 62 RELATIVE HUMIDITY (MEAN% 09UTC) 66 54 42 52 39 23 26 24 18 30 47 70 41 RELATIVE HUMIDITY (MEAN% 15UTC) 65 53 44 53 34 21 21 19 18 38 52 74 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 160.4 72.7 141.1 101.1 19.8 0.4 0.0 0.0 0.0 17.2 45.4 175.6 733.7 DAYS WITH PRECIPITATION >=10 5 2 5 5 0 0 0 0 0 0 2 6 25 DAYS WITH PRECIPITATION >= 5 6 4 7 6 2 0 0 0 0 2 2 8 37 DAYS WITH PRECIPITATION >= 1 11 7 8 12 3 0 0 0 0 3 6 15 65 DAYS WITH PRECIPITATION 16 7 10 14 8 1 0 0 0 5 9 16 86 GREATEST DAILY PRECIPITATION 38.0 42.0 32.0 21.0 8.0 0.4 0.0 0.0 0.0 8.0 25.0 53.0 53.0 DAY 3 12 20 7 9 20 ** ** ** 5 25 21 DAY WITH THUNDER STORM 1 1 2 3 1 0 0 0 0 2 0 0 10 DAYS WITH SNOW OR SLEET 11 1 4 0 0 0 0 0 0 0 2 12 30 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 225 225 225 225 45 225 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 10.1 9.7 9.9 11.4 8.5 10.7 7.4 10.1 10.0 10.0 12.3 11.4 10.4 PREVAILING WIND PERCENT 11.6 13.6 25.2 39.3 21.3 26.0 12.9 21.9 28.7 23.9 13.3 12.9 20.3 CALMS PERCENT OF WIND 65.8 51.4 38.7 23.3 50.3 36.0 49.0 48.4 50.0 63.9 72.7 62.6 51.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 185 194 197 214 210 228 17 233 225 218 224 194 212 VECTOR WIND MAGNITUDE(KNOTS) 2.3 2.2 3.5 5.9 2.4 2.6 0.3 2.3 3.7 2.8 1.6 2.3 2.5 WIND STEADINESES (MEAN %) 69.7 48.9 67.3 78.7 63.2 46.4 7.9 50.0 84.1 82.4 64.0 71.9 58.1 WIND SPEED (MEAN KNOTS) 3.3 4.5 5.2 7.5 3.8 5.6 3.8 4.6 4.4 3.4 2.5 3.2 4.3 FASTEST WIND DIRECTION 240 240 250 240 240 190 240 240 210 180 240 180 240 FASTEST WIND SPEED (KNOTS) 21 19 19 23 19 23 16 17 23 19 25 16 25 DAY 4 26 5 9 25 12 12 9 19 3 11 10 DAYS WITH SKY CLEAR (0-2)/8 14 15 11 4 15 27 26 29 30 15 13 7 206 DAYS WITH P.CLOUDY (3-6)/8 8 9 13 15 14 3 5 2 0 14 11 10 104 DAYS WITH CLOUDY (7-8)/8 9 4 7 11 2 0 0 0 0 2 6 14 55 DAYS WITH VISIBILITY =< 2 KM 6 2 1 0 0 0 0 0 0 0 1 4 14 DURATION OF SUNSHINE HOURS 141.7 177.1 214.8 167.3 306.9 370.5 371.3 363.0 326.4 210.1 166.6 73.2 2888.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 857.0 857.9 854.7 852.1 853.3 852.5 853.1 852.0 856.5 858.4 860.0 855.9 855.3 MAX. QFE PRESSURE IN HPA 867.8 868.0 866.3 859.9 859.7 859.6 858.8 857.4 861.6 864.3 869.0 865.5 869.0 DAY-HOUR 27- 6 6- 6 10- 6 1- 6 17- 6 25- 6 29- 6 31- 6 21- 6 11- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 844.6 845.7 844.9 843.7 849.1 845.0 845.4 846.4 851.2 852.9 850.9 839.6 839.6 DAY-HOUR 7-12 25- 3 22- 3 3- 3 19-15 19-15 24- 9 15-12 10-12 21- 9 12-12 21- 3 MEAN QNH PRESSURE IN HPA 1020.7 1021.8 1018.1 1015.1 1016.5 1015.6 1016.2 1015.0 1020.1 1022.4 1024.2 1019.4 1018.8 MAX. QNH PRESSURE IN HPA 1033.2 1033.4 1031.5 1024.1 1023.9 1023.8 1022.8 1021.2 1026.1 1029.2 1034.6 1030.6 1034.6 DAY-HOUR 27- 6 6- 6 10- 6 1- 6 17- 6 25- 6 29- 6 31- 6 21- 6 11- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 1006.5 1007.7 1006.8 1005.4 1011.7 1006.9 1007.4 1008.5 1014.1 1016.0 1013.7 1000.7 1000.7 DAY-HOUR 7-12 25- 3 22- 3 3- 3 19-15 19-15 24- 9 15-12 10-12 21- 9 12-12 21- 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 856.8 857.7 854.9 852.0 853.8 853.0 853.8 852.7 856.9 858.5 860.1 855.6 855.5 MAX. QFE PRESSURE IN HPA 866.3 867.2 865.0 859.0 859.2 859.2 858.6 856.6 860.6 863.6 867.6 864.9 867.6 DAY 27 6 11 1 17 25 29 31 29 11 18 3 MIN. QFE PRESSURE IN HPA 847.5 845.7 844.9 843.7 850.5 846.4 846.8 847.4 853.0 853.8 852.5 839.6 839.6 DAY 8 25 22 3 20 19 24 15 19 30 13 21 MEAN QNH PRESSURE IN HPA 1020.5 1021.5 1018.4 1015.0 1017.1 1016.2 1017.1 1015.8 1020.7 1022.5 1024.4 1019.2 1019.0 MAX. QNH PRESSURE IN HPA 1031.5 1032.5 1030.0 1023.1 1023.3 1023.3 1022.6 1020.3 1024.9 1028.4 1033.0 1029.9 1033.0 DAY 27 6 11 1 17 25 29 31 29 11 18 3 MIN. QNH PRESSURE IN HPA 1009.8 1007.7 1006.8 1005.4 1013.3 1008.5 1009.0 1009.7 1016.2 1017.1 1015.6 1000.7 1000.7 DAY 8 25 22 3 20 19 24 15 19 30 13 21 MEAN QFF PRESSURE IN HPA 1025.5 1024.1 1017.3 1011.8 1010.9 1006.3 1005.3 1004.4 1011.4 1016.1 1023.2 1024.0 1015.0 MAX. QFF PRESSURE IN HPA 1043.5 1038.0 1031.2 1023.0 1017.3 1012.9 1011.0 1010.3 1016.2 1022.3 1032.8 1039.9 1043.5 DAY 27 6 11 1 17 4 29 31 21 23 18 14 MIN. QFF PRESSURE IN HPA 1010.8 1007.7 1005.0 1004.4 1003.6 997.6 997.1 996.8 1006.1 1007.1 1010.6 1003.0 996.8 DAY 7 25 27 25 29 19 24 15 19 3 12 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 857.8 858.9 855.7 852.7 854.3 853.4 854.2 853.2 857.7 859.5 861.2 856.5 856.2 MAX. QFE PRESSURE IN HPA 867.8 868.0 866.3 859.9 859.7 859.6 858.8 857.4 861.6 864.3 869.0 865.5 869.0 DAY 27 6 10 1 17 25 29 31 21 11 18 3 MIN. QFE PRESSURE IN HPA 848.0 848.8 845.6 844.2 850.8 846.4 846.0 848.1 853.6 854.2 853.2 840.4 840.4 DAY 8 12 22 3 24 19 24 15 19 21 12 21 MEAN QNH PRESSURE IN HPA 1021.7 1022.9 1019.2 1015.8 1017.7 1016.6 1017.5 1016.4 1021.6 1023.7 1025.6 1020.2 1019.9 MAX. QNH PRESSURE IN HPA 1033.2 1033.4 1031.5 1024.1 1023.9 1023.8 1022.8 1021.2 1026.1 1029.2 1034.6 1030.6 1034.6 DAY 27 6 10 1 17 25 29 31 21 11 18 3 MIN. QNH PRESSURE IN HPA 1010.4 1011.3 1007.6 1006.0 1013.6 1008.5 1008.1 1010.5 1016.8 1017.5 1016.4 1001.6 1001.6 DAY 8 12 22 3 24 19 24 15 19 21 12 21 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 857.4 858.5 855.1 852.3 853.5 853.0 853.3 852.2 856.6 858.6 860.3 856.2 855.6 MAX. QFE PRESSURE IN HPA 867.2 867.0 866.0 858.8 859.1 859.3 858.0 856.3 860.3 863.7 868.5 864.8 868.5 DAY 27 6 10 1 17 24 29 31 29 10 18 3 MIN. QFE PRESSURE IN HPA 847.8 849.1 845.6 844.4 849.1 846.7 845.4 847.4 852.6 852.9 852.1 840.4 840.4 DAY 7 26 22 3 24 20 24 15 10 21 12 21 MEAN QNH PRESSURE IN HPA 1021.2 1022.5 1018.5 1015.4 1016.7 1016.1 1016.5 1015.3 1020.3 1022.6 1024.6 1019.8 1019.1 MAX. QNH PRESSURE IN HPA 1032.5 1032.3 1031.1 1022.8 1023.2 1023.4 1021.9 1020.0 1024.6 1028.5 1034.0 1029.8 1034.0 DAY 27 6 10 1 17 24 29 31 29 10 18 3 MIN. QNH PRESSURE IN HPA 1010.2 1011.7 1007.6 1006.2 1011.7 1008.9 1007.4 1009.7 1015.7 1016.0 1015.1 1001.6 1001.6 DAY 7 26 22 3 24 20 24 15 10 21 12 21 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 856.3 857.2 853.8 851.8 852.5 851.9 852.3 851.0 855.5 857.8 859.1 855.4 854.5 MAX. QFE PRESSURE IN HPA 865.2 866.1 863.9 858.8 857.7 857.8 856.8 855.0 859.0 863.3 866.2 863.6 866.2 DAY 27 5 6 1 17 24 29 12 21 10 18 3 MIN. QFE PRESSURE IN HPA 844.6 845.7 845.2 843.8 849.1 845.3 845.4 846.4 851.2 853.2 850.9 840.6 840.6 DAY 7 26 22 3 24 19 24 15 10 30 12 21 MEAN QNH PRESSURE IN HPA 1020.0 1021.0 1017.1 1014.7 1015.5 1014.8 1015.3 1013.8 1019.0 1021.6 1023.2 1018.9 1017.9 MAX. QNH PRESSURE IN HPA 1030.2 1031.2 1028.7 1022.8 1021.6 1021.7 1020.5 1018.5 1023.1 1028.0 1031.4 1028.4 1031.4 DAY 27 5 6 1 17 24 29 12 21 10 18 3 MIN. QNH PRESSURE IN HPA 1006.5 1007.7 1007.2 1005.6 1011.7 1007.3 1007.4 1008.5 1014.1 1016.4 1013.7 1001.9 1001.9 DAY 7 26 22 3 24 19 24 15 10 30 12 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.6 857.1 854.0 851.6 852.4 851.5 851.8 850.8 855.6 857.8 859.4 855.6 854.5 MAX. QFE PRESSURE IN HPA 865.2 866.1 863.9 857.5 857.1 857.1 856.4 854.8 859.5 863.0 866.5 863.7 866.5 DAY 27 5 6 1 17 24 29 30 23 10 17 29 MIN. QFE PRESSURE IN HPA 845.4 847.0 844.9 844.0 849.1 845.0 845.8 846.4 851.2 853.8 851.3 841.7 841.7 DAY 7 26 26 3 19 19 24 15 10 29 12 20 MEAN QNH PRESSURE IN HPA 1020.3 1020.9 1017.3 1014.6 1015.4 1014.5 1014.8 1013.6 1019.1 1021.7 1023.5 1019.2 1017.9 MAX. QNH PRESSURE IN HPA 1030.2 1031.2 1028.7 1021.3 1020.9 1020.9 1020.1 1018.2 1023.6 1027.7 1031.7 1028.5 1031.7 DAY 27 5 6 1 17 24 29 30 23 10 17 29 MIN. QNH PRESSURE IN HPA 1007.4 1009.2 1006.8 1005.8 1011.7 1006.9 1007.9 1008.5 1014.1 1017.1 1014.2 1003.1 1003.1 DAY 7 26 26 3 19 19 24 15 10 29 12 20 MEAN QFF PRESSURE IN HPA 1025.3 1023.4 1016.1 1011.3 1009.1 1004.6 1003.1 1002.3 1009.9 1015.4 1022.4 1024.0 1013.9 MAX. QFF PRESSURE IN HPA 1041.7 1036.6 1028.7 1020.2 1014.5 1010.6 1008.8 1008.4 1014.8 1020.5 1032.0 1040.9 1041.7 DAY 25 5 6 1 17 8 29 30 23 26 17 14 MIN. QFF PRESSURE IN HPA 1006.4 1009.8 1001.5 1005.7 1003.4 996.5 996.7 995.7 1005.4 1008.7 1009.7 1006.0 995.7 DAY 7 26 26 3 28 19 24 14 10 3 12 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 1.7 4.4 12.6 18.5 23.3 27.4 28.3 22.8 18.3 7.9 2.2 14.1 MINIMUN AIR TEMPERATURE (C) -2.1 -1.8 0.3 7.3 9.9 13.9 18.1 18.4 14.5 11.3 3.5 -0.7 7.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 2 1 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 9 7 4 0 0 0 0 0 0 0 0 9 29 DAYS WITH FREEZING MIN.<= 0 21 23 12 0 0 0 0 0 0 0 8 16 80 TEMPERATURE RECORDS LOWEST(C) -15.0 -7.0 -10.0 0.6 4.8 7.6 14.2 14.6 10.2 6.0 -2.2 -10.2 -15.0 DAY 1 19 2 1 1 1 10 27 9 31 17 25 MAXIMUM AIR TEMPERATURE (C) 4.9 4.9 7.7 16.4 23.0 28.1 32.3 33.6 28.2 23.1 11.6 4.7 18.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 11 29 30 9 0 0 0 79 DAYS WITH MAXIMUM TEMP. <= 0 5 2 0 0 0 0 0 0 0 0 0 4 11 TEMPERATURE RECORDS HIGHEST(C) 14.4 11.0 13.2 23.6 27.0 32.2 36.0 39.0 34.4 28.2 20.2 11.4 39.0 DAY 8 8 16 5 16 29 16 11 5 9 6 17 DIF. BETWEEN (MAX.-MIN.) (C) 7.0 6.7 7.4 9.1 13.1 14.2 14.2 15.2 13.7 11.8 8.1 5.4 10.5 MEAN DAILY TEMP. (MDT) (C) 1.4 1.6 4.0 11.9 16.4 21.0 25.2 26.0 21.4 17.2 7.5 2.0 13.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 31.5 129.4 155.6 36.4 0.0 0.0 0.0 352.9 HEATING DEG. DAYS(BASE 18 0C) 514.5 459.6 434.0 184.4 56.0 8.8 0.0 0.0 0.4 39.2 313.8 496.2 2506.9 DEWPOINT (MEAN C) -5.4 -5.2 -2.9 2.2 4.9 8.3 8.7 6.3 4.2 2.4 -0.0 -2.2 1.8 MIXING RATIO (G/KG) 3.10 3.13 3.80 5.42 6.70 8.28 8.62 7.30 6.20 5.53 4.63 3.93 5.55 VAPOUR PRESSURE (HPA) 4.25 4.26 5.18 7.38 9.11 11.19 11.62 9.90 8.44 7.55 6.35 5.38 7.55 SATURATION DEF. (HPA) 2.95 2.81 3.43 7.83 13.07 18.77 26.06 30.15 20.70 14.35 4.73 2.06 12.24 RELATIVE HUMIDITY (MEAN %) 64 63 63 53 44 42 34 28 33 39 61 74 50 RELATIVE HUMIDITY (MAX. %) 76 79 78 73 68 63 52 47 51 60 78 85 68 RELATIVE HUMIDITY (MIN. %) 51 48 49 38 30 28 22 17 21 26 46 65 37 RELATIVE HUMIDITY (MEAN% 03UTC) 72 70 76 68 66 63 51 47 50 58 76 79 65 RELATIVE HUMIDITY (MEAN% 09UTC) 60 59 56 48 37 37 29 24 27 29 56 72 45 RELATIVE HUMIDITY (MEAN% 15UTC) 60 61 59 50 35 31 23 19 27 35 55 74 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 58.2 128.4 222.6 143.8 12.8 6.2 0.0 1.0 0.0 71.6 129.8 110.8 885.2 DAYS WITH PRECIPITATION >=10 1 4 6 6 0 0 0 0 0 2 5 4 28 DAYS WITH PRECIPITATION >= 5 4 8 11 10 0 1 0 0 0 2 6 7 49 DAYS WITH PRECIPITATION >= 1 5 15 13 12 8 1 0 1 0 5 9 13 82 DAYS WITH PRECIPITATION 7 17 14 13 9 2 0 1 0 5 9 15 92 GREATEST DAILY PRECIPITATION 29.0 46.0 42.0 38.0 2.0 6.0 0.0 1.0 0.0 41.0 55.4 19.0 55.4 DAY 28 22 25 16 7 1 ** 22 ** 29 11 3 DAY WITH THUNDER STORM 0 1 3 2 5 0 0 0 0 2 3 0 16 DAYS WITH SNOW OR SLEET 7 13 3 0 0 0 0 0 0 0 1 7 31 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 225 45 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 12.5 11.6 12.1 10.0 11.5 9.3 7.9 6.5 11.3 12.3 12.3 11.2 11.1 PREVAILING WIND PERCENT 12.3 23.6 23.9 22.7 18.7 12.7 11.0 9.7 20.0 27.7 16.0 12.3 17.5 CALMS PERCENT OF WIND 55.5 36.4 46.5 44.0 52.3 57.3 51.0 56.8 64.0 47.1 70.7 60.0 53.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 194 196 205 197 233 187 216 262 233 213 210 208 208 VECTOR WIND MAGNITUDE(KNOTS) 2.4 4.0 3.8 3.6 1.8 1.2 0.5 0.5 2.5 4.2 2.1 2.2 2.3 WIND STEADINESES (MEAN %) 55.8 71.4 76.0 73.5 46.2 37.5 16.7 16.7 73.5 75.0 72.4 61.1 57.5 WIND SPEED (MEAN KNOTS) 4.3 5.6 5.0 4.9 3.9 3.2 3.0 3.0 3.4 5.6 2.9 3.6 4.0 FASTEST WIND DIRECTION 240 240 240 210 240 60 240 270 240 240 240 240 240 FASTEST WIND SPEED (KNOTS) 25 27 25 23 21 21 17 25 19 23 27 21 27 DAY 14 11 28 25 26 5 29 10 13 25 13 7 DAYS WITH SKY CLEAR (0-2)/8 11 7 8 6 21 28 29 31 30 19 15 6 211 DAYS WITH P.CLOUDY (3-6)/8 9 10 13 17 9 2 2 0 0 10 8 15 95 DAYS WITH CLOUDY (7-8)/8 11 11 10 7 1 0 0 0 0 2 7 10 59 DAYS WITH VISIBILITY =< 2 KM 2 1 0 0 0 0 0 0 0 0 0 2 5 DURATION OF SUNSHINE HOURS 122.0 129.9 179.2 161.3 294.6 340.3 359.0 350.7 312.5 232.4 163.2 99.5 2744.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 857.2 852.4 853.0 854.3 855.9 852.5 850.3 853.5 855.0 857.3 859.1 858.9 854.9 MAX. QFE PRESSURE IN HPA 864.6 861.2 865.2 862.0 863.6 859.3 857.5 857.1 862.7 864.2 868.0 868.6 868.6 DAY-HOUR 11- 6 12- 6 2- 9 30- 9 1- 6 6- 6 3- 6 3- 6 23- 6 15- 6 25- 6 11-15 MIN. QFE PRESSURE IN HPA 842.0 839.1 839.1 844.6 848.3 845.8 845.6 850.0 850.0 848.1 848.8 848.8 839.1 DAY-HOUR 28-12 20- 3 26- 3 20-15 7- 9 30-15 1-15 14-12 7-15 29- 3 9-15 6-12 MEAN QNH PRESSURE IN HPA 1020.9 1015.5 1016.1 1017.7 1019.4 1015.6 1013.0 1016.7 1018.5 1021.1 1023.2 1022.9 1018.4 MAX. QNH PRESSURE IN HPA 1029.5 1025.6 1030.2 1026.5 1028.4 1023.4 1021.3 1020.9 1027.3 1029.1 1033.4 1034.1 1034.1 DAY-HOUR 11- 6 12- 6 2- 9 30- 9 1- 6 6- 6 3- 6 3- 6 23- 6 15- 6 25- 6 11-15 MIN. QNH PRESSURE IN HPA 1003.5 1000.1 1000.1 1006.5 1010.7 1007.9 1007.6 1012.7 1012.7 1010.5 1011.3 1011.3 1000.1 DAY-HOUR 28-12 20- 3 26- 3 20-15 7- 9 30-15 1-15 14-12 7-15 29- 3 9-15 6-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.0 852.2 852.7 854.2 856.4 853.3 851.0 854.2 855.7 857.5 859.2 858.7 855.2 MAX. QFE PRESSURE IN HPA 863.4 859.3 863.9 859.9 862.4 858.7 856.7 856.9 862.3 862.6 866.1 866.7 866.7 DAY 12 7 2 30 1 6 3 4 23 15 25 12 MIN. QFE PRESSURE IN HPA 845.2 839.1 839.1 846.3 849.5 849.0 846.9 851.5 851.0 848.1 851.2 849.0 839.1 DAY 28 20 26 20 7 30 8 14 7 29 9 19 MEAN QNH PRESSURE IN HPA 1020.8 1015.3 1015.8 1017.5 1020.0 1016.5 1013.9 1017.6 1019.2 1021.3 1023.3 1022.7 1018.7 MAX. QNH PRESSURE IN HPA 1028.1 1023.4 1028.7 1024.1 1027.0 1022.7 1020.4 1020.6 1026.9 1027.2 1031.2 1031.9 1031.9 DAY 12 7 2 30 1 6 3 4 23 15 25 12 MIN. QNH PRESSURE IN HPA 1007.2 1000.1 1000.1 1008.4 1012.1 1011.5 1009.1 1014.4 1013.8 1010.5 1014.1 1011.5 1000.1 DAY 28 20 26 20 7 30 8 14 7 29 9 19 MEAN QFF PRESSURE IN HPA 1024.1 1018.1 1017.2 1013.8 1013.3 1006.9 1001.7 1005.4 1010.1 1014.8 1022.6 1025.2 1014.4 MAX. QFF PRESSURE IN HPA 1032.5 1028.6 1036.6 1024.5 1024.5 1016.5 1009.3 1009.2 1020.5 1020.9 1032.7 1037.5 1037.5 DAY 1 28 2 29 1 6 3 18 23 23 25 12 MIN. QFF PRESSURE IN HPA 1009.0 1001.5 998.9 1001.8 1004.5 999.2 996.5 1002.4 1001.7 1004.1 1009.9 1011.1 996.5 DAY 28 20 26 20 29 30 8 14 6 27 9 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.1 853.2 853.8 855.0 856.8 853.7 851.5 854.8 856.3 858.4 860.3 859.8 856.0 MAX. QFE PRESSURE IN HPA 864.6 861.2 865.1 861.3 863.6 859.3 857.5 857.1 862.7 864.2 868.0 867.9 868.0 DAY 11 12 2 30 1 6 3 3 23 15 25 11 MIN. QFE PRESSURE IN HPA 844.6 840.0 840.9 846.5 849.0 849.0 846.9 852.1 851.0 849.8 851.2 849.7 840.0 DAY 28 19 26 20 7 30 8 14 7 27 9 6 MEAN QNH PRESSURE IN HPA 1022.0 1016.3 1017.1 1018.5 1020.5 1016.9 1014.4 1018.2 1020.0 1022.4 1024.5 1024.0 1019.6 MAX. QNH PRESSURE IN HPA 1029.5 1025.6 1030.1 1025.7 1028.4 1023.4 1021.3 1020.9 1027.3 1029.1 1033.4 1033.3 1033.4 DAY 11 12 2 30 1 6 3 3 23 15 25 11 MIN. QNH PRESSURE IN HPA 1006.5 1001.2 1002.2 1008.7 1011.5 1011.5 1009.1 1015.1 1013.8 1012.5 1014.1 1012.3 1001.2 DAY 28 19 26 20 7 30 8 14 7 27 9 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 857.6 853.0 853.6 854.6 856.1 852.8 850.7 853.7 855.4 857.5 859.5 859.3 855.3 MAX. QFE PRESSURE IN HPA 864.0 861.2 865.2 862.0 863.0 858.2 857.5 856.6 861.3 863.1 867.2 868.3 868.3 DAY 11 12 2 30 1 6 3 17 22 15 25 11 MIN. QFE PRESSURE IN HPA 843.2 840.0 840.9 846.2 848.3 848.0 846.7 851.2 851.1 848.3 850.2 849.1 840.0 DAY 28 19 26 20 7 30 8 14 6 29 9 6 MEAN QNH PRESSURE IN HPA 1021.5 1016.1 1016.9 1018.0 1019.8 1015.9 1013.5 1017.0 1018.9 1021.3 1023.7 1023.4 1018.8 MAX. QNH PRESSURE IN HPA 1028.8 1025.6 1030.2 1026.5 1027.7 1022.1 1021.3 1020.3 1025.7 1027.8 1032.5 1033.8 1033.8 DAY 11 12 2 30 1 6 3 17 22 15 25 11 MIN. QNH PRESSURE IN HPA 1004.9 1001.2 1002.2 1008.3 1010.7 1010.4 1008.9 1014.1 1014.0 1010.7 1012.9 1011.7 1001.2 DAY 28 19 26 20 7 30 8 14 6 29 9 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 856.4 851.8 852.5 854.0 855.1 851.5 849.4 852.5 854.0 856.5 858.4 858.3 854.2 MAX. QFE PRESSURE IN HPA 863.4 859.9 863.0 861.5 861.4 856.6 855.6 854.8 860.4 861.6 865.7 867.8 867.8 DAY 11 28 2 30 1 6 3 3 22 15 25 11 MIN. QFE PRESSURE IN HPA 842.0 840.4 841.7 846.0 848.7 846.2 846.2 850.0 850.4 849.0 849.5 848.8 840.4 DAY 28 20 26 20 7 30 1 14 5 29 9 6 MEAN QNH PRESSURE IN HPA 1020.1 1014.8 1015.6 1017.3 1018.6 1014.5 1012.0 1015.5 1017.3 1020.2 1022.4 1022.3 1017.5 MAX. QNH PRESSURE IN HPA 1028.1 1024.1 1027.7 1026.0 1025.8 1020.3 1019.2 1018.2 1024.7 1026.1 1030.8 1033.2 1033.2 DAY 11 28 2 30 1 6 3 3 22 15 25 11 MIN. QNH PRESSURE IN HPA 1003.5 1001.6 1003.1 1008.1 1011.2 1008.3 1008.3 1012.7 1013.2 1011.5 1012.1 1011.3 1001.6 DAY 28 20 26 20 7 30 1 14 5 29 9 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.7 851.9 852.3 853.9 854.9 851.2 849.0 852.2 853.8 856.6 858.4 858.6 854.1 MAX. QFE PRESSURE IN HPA 863.4 860.4 862.7 861.5 860.5 856.2 855.2 854.8 860.7 861.8 866.0 868.6 868.6 DAY 11 28 2 30 1 6 3 3 22 15 25 11 MIN. QFE PRESSURE IN HPA 843.2 841.7 842.7 844.6 848.7 845.8 845.6 850.0 850.0 848.5 848.8 849.7 841.7 DAY 28 19 26 20 7 30 1 14 7 28 9 6 MEAN QNH PRESSURE IN HPA 1020.4 1014.9 1015.4 1017.2 1018.3 1014.1 1011.6 1015.2 1017.1 1020.3 1022.3 1022.6 1017.4 MAX. QNH PRESSURE IN HPA 1028.1 1024.7 1027.3 1026.0 1024.8 1019.8 1018.7 1018.2 1025.0 1026.3 1031.1 1034.1 1034.1 DAY 11 28 2 30 1 6 3 3 22 15 25 11 MIN. QNH PRESSURE IN HPA 1004.9 1003.1 1004.3 1006.5 1011.2 1007.9 1007.6 1012.7 1012.7 1011.0 1011.3 1012.3 1003.1 DAY 28 19 26 20 7 30 1 14 7 28 9 6 MEAN QFF PRESSURE IN HPA 1023.6 1017.8 1016.6 1013.5 1011.6 1004.3 999.4 1003.1 1008.0 1013.9 1021.6 1025.1 1013.2 MAX. QFF PRESSURE IN HPA 1030.8 1030.6 1034.8 1023.9 1021.6 1013.7 1006.9 1006.6 1017.9 1019.0 1032.7 1037.8 1037.8 DAY 1 28 2 30 1 6 3 17 22 31 25 11 MIN. QFF PRESSURE IN HPA 1008.3 1004.6 1005.6 1000.4 1003.2 996.5 994.9 1000.2 1001.6 1004.2 1007.3 1010.5 994.9 DAY 28 19 26 20 28 30 7 20 5 28 9 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 PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.2 -0.2 5.3 12.1 17.3 22.7 26.6 26.5 22.2 15.6 7.9 2.1 13.1 MINIMUN AIR TEMPERATURE (C) -5.5 -4.3 -0.0 5.7 9.2 12.9 17.0 16.4 12.4 8.2 2.5 -2.0 6.0 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.0 0.0 0.1 2.9 1.6 0.1 0.1 0.0 0.0 4.8 DAYS WITH MINIMUM TEMP. <=-4 16.4 12.8 4.2 0.1 0.0 0.0 0.0 0.0 0.0 0.0 1.9 9.2 44.6 DAYS WITH FREEZING MIN.<= 0 26.6 22.1 15.6 1.8 0.0 0.0 0.0 0.0 0.0 0.1 8.4 19.6 94.2 TEMPERATURE RECORDS LOWEST(C) -28.6 -25.0 -20.0 -6.0 0.6 4.0 10.4 8.8 5.0 -0.4 -17.0 -22.0 -28.6 YEAR-DAY 89- 5 89-15 92- 2 97-11 92- 6 89-21 89- 1 89-16 89-21 96-31 92-27 88-29 89- 5 MAXIMUM AIR TEMPERATURE (C) 2.4 4.2 9.2 16.4 22.1 28.1 32.1 32.4 28.1 20.7 12.4 5.8 17.8 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.0 0.0 0.2 9.1 24.4 26.0 10.3 0.1 0.0 0.0 70.1 DAYS WITH MAXIMUM TEMP. <= 0 10.0 5.7 1.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.7 21.9 TEMPERATURE RECORDS HIGHEST(C) 17.4 16.6 23.6 28.0 32.0 36.0 39.0 39.0 36.4 30.4 22.0 19.4 39.0 YEAR-DAY 0- 2 87- 3 1-28 97-25 99-30 91-30 89-21 91- 1 98- 1 99- 1 90- 3 98-10 89-21 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 8.5 9.2 10.7 12.9 15.2 15.1 16.0 15.7 12.5 9.9 7.8 11.8 MEAN DAILY TEMP. (MDT) (C) -1.6 -0.1 4.6 11.1 15.7 20.5 24.5 24.4 20.3 14.5 7.5 1.9 11.9 STANDARD DEVIATION OF MDT(C) 3.17 3.35 2.72 1.54 1.38 1.30 1.18 1.56 1.19 1.61 1.70 2.73 1.95 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.7 22.6 110.9 107.2 17.8 0.5 0.0 0.0 259.7 HEATING DEG. DAYS(BASE 18 0C) 604.8 500.2 415.9 207.8 82.5 5.9 0.0 0.0 7.9 112.1 302.1 488.1 2727.3 DEWPOINT (MEAN C) -6.4 -6.3 -2.2 2.1 5.0 6.3 8.7 7.1 3.7 2.7 -0.0 -3.6 1.4 MIXING RATIO (G/KG) 2.94 2.98 3.97 5.38 6.63 7.27 8.63 7.84 6.11 5.57 4.67 3.59 5.47 VAPOUR PRESSURE (HPA) 4.04 4.08 5.42 7.33 9.03 9.87 11.67 10.63 8.33 7.63 6.40 4.92 7.44 SATURATION DEF. (HPA) 1.96 2.38 3.99 7.50 11.72 18.73 24.59 25.54 19.85 11.04 4.84 2.63 11.23 RELATIVE HUMIDITY (MEAN %) 71 66 63 55 49 39 36 33 34 47 61 69 51 RELATIVE HUMIDITY (MAX. %) 85 83 81 75 72 61 56 53 54 68 79 84 71 RELATIVE HUMIDITY (MIN. %) 58 54 48 38 32 24 23 21 21 32 43 54 37 RELATIVE HUMIDITY (MEAN% 03UTC) 78 76 76 72 71 61 56 53 54 66 76 77 68 RELATIVE HUMIDITY (MEAN% 09UTC) 68 64 57 47 40 32 31 28 27 38 53 64 46 RELATIVE HUMIDITY (MEAN% 15UTC) 68 65 57 47 38 28 25 23 26 41 57 66 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 86.6 100.6 111.9 97.3 36.8 5.9 1.0 1.4 1.9 38.9 91.2 103.1 676.6 DAYS WITH PRECIPITATION >=10 2.8 3.7 4.0 3.6 1.1 0.1 0.0 0.0 0.1 1.3 3.2 3.6 23.5 DAYS WITH PRECIPITATION >= 5 5.1 5.6 6.4 5.3 2.3 0.4 0.1 0.1 0.2 2.9 4.8 5.6 38.8 DAYS WITH PRECIPITATION >= 1 9.2 9.4 11.4 9.4 5.8 1.2 0.3 0.3 0.4 4.9 7.4 9.4 69.1 DAYS WITH PRECIPITATION 11.6 11.6 13.0 11.4 7.9 2.1 0.7 0.6 0.9 6.9 9.2 11.5 87.4 GREATEST DAILY PRECIPITATION 89.0 64.0 58.0 45.0 50.0 22.8 6.0 9.0 11.0 51.0 85.0 74.0 89.0 YEAR-DAY 92-16 92- 7 98-17 93- 8 93-13 94-28 1-19 88- 4 94- 8 93-28 91- 4 91- 9 92 DAY WITH THUNDER STORM 0.2 0.6 1.0 2.8 2.7 1.1 0.2 0.2 0.2 1.1 1.3 0.2 11.6 DAYS WITH SNOW OR SLEET 8.7 8.0 6.4 0.7 0.1 0.0 0.0 0.0 0.0 0.1 1.5 6.3 31.8 DAYS WITH DUST 0.3 0.2 0.2 0.2 0.3 0.4 0.1 0.2 0.5 0.2 0.0 0.6 3.2 WIND DIRECTION (PREVAILING) 180 180 225 225 225 225 45 225 225 225 225 180 225 PREVAILING WIND SPEED(KNOTS) 10.0 9.7 11.0 11.2 10.8 9.9 7.0 10.4 10.6 10.3 10.7 9.6 10.7 PREVAILING WIND PERCENT 11.9 11.9 16.0 18.8 15.8 10.6 9.5 10.1 16.1 15.5 13.6 13.2 12.9 CALMS PERCENT OF WIND 67.6 62.8 53.1 48.2 55.1 61.3 61.5 61.5 57.6 60.7 63.9 61.7 59.6 NO. OF WIND OBSERVATION 180.2 167.3 170.1 170.3 178.9 176.7 178.9 177.2 174.6 183.5 170.4 177.1 2105.2 VECTOR WIND DIRECTION (MEAN) 198 196 212 218 226 232 335 258 237 221 207 198 217 VECTOR WIND MAGNITUDE(KNOTS) 2.1 2.4 2.8 3.7 2.9 1.8 0.4 1.1 2.4 2.4 2.6 2.7 2.1 WIND STEADINESES (MEAN %) 63.6 64.9 58.3 67.3 63.0 50.0 13.3 31.4 60.0 64.9 74.3 69.2 53.8 WIND SPEED (MEAN KNOTS) 3.3 3.7 4.8 5.5 4.6 3.6 3.0 3.5 4.0 3.7 3.5 3.9 3.9 FASTEST WIND DIRECTION 240 270 230 270 170 180 40 240 230 200 240 250 270 FASTEST WIND SPEED (KNOTS) 49 29 31 58 39 45 29 39 29 29 27 39 58 YEAR-DAY 89- 1 95- 4 0-14 89-15 89- 5 92-26 89-25 98-20 93- 3 92-10 3-13 86-22 89 DAYS WITH SKY CLEAR (0-2)/8 10.8 10.1 10.2 8.9 15.3 24.7 27.2 27.9 26.8 17.9 13.4 9.9 203.1 DAYS WITH P.CLOUDY (3-6)/8 10.1 8.9 11.0 13.5 12.2 4.8 3.6 2.8 2.8 9.9 10.1 11.4 101.1 DAYS WITH CLOUDY (7-8)/8 10.0 9.1 9.8 7.6 3.5 0.5 0.1 0.2 0.3 3.2 6.5 9.6 60.4 DAYS WITH VISIBILITY =< 2 KM 4.7 3.1 1.6 0.5 0.3 0.2 0.1 0.0 0.2 0.4 0.7 2.6 14.4 DURATION OF SUNSHINE HOURS 119.9 140.0 173.8 203.8 275.9 330.8 351.5 339.5 293.2 223.7 166.0 126.2 2744.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 857.6 856.2 855.0 855.8 856.4 854.5 853.6 854.7 857.4 859.9 859.6 858.7 856.6 MAX. QFE PRESSURE IN HPA 870.0 868.8 868.0 867.1 866.0 869.0 862.5 865.6 869.7 871.6 871.5 871.0 871.6 YEAR-DAY 94-18 94-18 95- 3 88- 8 92-14 93-22 93-27 92-31 94-23 94-11 94- 2 94- 7 94-11 MIN. QFE PRESSURE IN HPA 840.2 838.4 839.0 841.8 844.8 843.2 844.7 846.4 846.7 848.1 841.9 838.0 838.0 YEAR-DAY 92-30 1-21 87-13 96-12 1-29 1-17 0-10 2-15 96-21 3-29 1-18 88-27 88-27 MEAN QNH PRESSURE IN HPA 1021.5 1019.8 1018.4 1019.3 1020.0 1017.9 1016.8 1018.1 1021.2 1024.1 1023.7 1022.8 1020.3 MAX. QNH PRESSURE IN HPA 1035.7 1034.4 1033.4 1032.4 1031.1 1034.6 1027.1 1030.7 1035.4 1037.6 1037.5 1036.9 1037.6 YEAR-DAY 94-18 94-18 95- 3 88- 8 92-14 93-22 93-27 92-31 94-23 94-11 94- 2 94- 7 94-11 MIN. QNH PRESSURE IN HPA 1001.4 999.3 1000.0 1003.2 1006.7 1004.9 1006.6 1008.5 1008.9 1010.5 1003.4 998.9 998.9 YEAR-DAY 92-30 1-21 87-13 96-12 1-29 1-17 0-10 2-15 96-21 3-29 1-18 88-27 88-27 MEAN QFF PRESSURE IN HPA 1025.8 1024.4 1019.1 1016.4 1014.3 1008.1 1004.5 1005.8 1012.5 1019.4 1023.6 1028.2 1016.8 MAX. QFF PRESSURE IN HPA 1042.4 1045.7 1036.9 1030.0 1026.4 1020.3 1017.2 1015.6 1028.3 1033.9 1038.4 1049.2 1049.2 YEAR-DAY 94-18 97- 7 97-11 94- 5 94-17 95- 1 94- 1 94-15 94-23 94-11 96-18 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1004.2 1006.1 1002.1 999.6 1001.0 995.6 994.4 995.8 999.3 1005.3 1007.1 1011.8 994.4 YEAR-DAY 0-21 96- 1 98-29 96-12 97- 4 97-24 98- 5 98-20 96-21 98- 1 98- 9 94- 3 98- 5 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 858.1 856.8 855.2 856.1 857.4 854.7 853.4 854.7 857.9 860.6 861.1 861.1 857.2 MAX. QFE PRESSURE IN HPA 869.9 868.0 867.0 865.5 865.4 861.5 860.3 862.0 868.9 871.0 870.0 870.0 871.0 YEAR-DAY 95- 7 94-19 95- 3 94- 5 94-18 95- 1 94- 3 94-15 94-24 94-11 94- 2 94- 7 94-11 MIN. QFE PRESSURE IN HPA 841.8 845.3 843.2 842.1 845.4 846.7 845.7 848.0 847.0 850.7 849.0 849.0 841.8 YEAR-DAY 0-21 96- 2 97-29 96-13 97- 4 97-25 98- 5 97- 5 96-22 96-27 93-11 94- 4 0-21 MEAN QNH PRESSURE IN HPA 1022.0 1020.5 1018.7 1019.7 1021.3 1018.1 1016.6 1018.1 1021.8 1024.9 1025.4 1025.5 1021.0 MAX. QNH PRESSURE IN HPA 1035.6 1033.4 1032.3 1030.6 1030.4 1026.0 1024.6 1026.5 1034.5 1036.9 1035.7 1035.7 1036.9 YEAR-DAY 95- 7 94-19 95- 3 94- 5 94-18 95- 1 94- 3 94-15 94-24 94-11 94- 2 94- 7 94-11 MIN. QNH PRESSURE IN HPA 1003.2 1007.3 1004.9 1003.6 1007.4 1008.9 1007.7 1010.4 1009.2 1013.5 1011.5 1011.5 1003.2 YEAR-DAY 0-21 96- 2 97-29 96-13 97- 4 97-25 98- 5 97- 5 96-22 96-27 93-11 94- 4 0-21 MEAN QFF PRESSURE IN HPA 1025.4 1023.5 1019.3 1016.0 1014.2 1008.2 1004.7 1005.7 1012.2 1018.9 1024.3 1027.7 1016.7 MAX. QFF PRESSURE IN HPA 1040.2 1042.3 1035.5 1028.3 1026.1 1019.4 1016.5 1013.5 1026.7 1032.2 1035.7 1048.1 1048.1 YEAR-DAY 94-19 97- 7 97-11 94- 5 94-18 94-29 94- 1 94-15 94-23 94-11 96-18 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1004.7 1006.9 1006.4 1000.6 1001.0 996.9 994.4 997.3 999.4 1007.2 1009.1 1015.2 994.4 YEAR-DAY 0-21 94- 1 97-25 96-13 97- 4 97-24 98- 5 97- 5 96- 8 98- 1 93-11 94- 4 98- 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.3 855.9 855.1 855.8 856.6 855.0 854.2 855.4 857.8 860.1 859.6 858.5 856.8 MAX. QFE PRESSURE IN HPA 869.5 867.5 867.0 865.9 865.4 868.5 861.8 865.0 868.8 871.0 870.4 870.0 871.0 YEAR-DAY 95- 7 94-19 95- 3 94- 5 94-18 93-22 92- 6 92-31 94-24 94-11 94- 2 94- 7 94-11 MIN. QFE PRESSURE IN HPA 841.0 838.4 839.1 843.5 845.6 843.8 846.0 847.4 848.0 848.1 841.9 838.0 838.0 YEAR-DAY 0-21 1-21 3-26 90- 2 97- 4 99-25 98- 5 2-15 96-22 3-29 1-18 88-27 88-27 MEAN QNH PRESSURE IN HPA 1021.1 1019.5 1018.6 1019.3 1020.3 1018.5 1017.6 1018.9 1021.6 1024.3 1023.8 1022.5 1020.5 MAX. QNH PRESSURE IN HPA 1035.2 1032.9 1032.3 1031.0 1030.4 1034.0 1026.3 1030.0 1034.4 1036.9 1036.2 1035.7 1036.9 YEAR-DAY 95- 7 94-19 95- 3 94- 5 94-18 93-22 92- 6 92-31 94-24 94-11 94- 2 94- 7 94-11 MIN. QNH PRESSURE IN HPA 1002.3 999.3 1000.1 1005.2 1007.6 1005.6 1008.1 1009.7 1010.4 1010.5 1003.4 998.9 998.9 YEAR-DAY 0-21 1-21 3-26 90- 2 97- 4 99-25 98- 5 2-15 96-22 3-29 1-18 88-27 88-27 MEAN QFF PRESSURE IN HPA 1026.4 1023.8 1019.7 1016.0 1014.2 1009.1 1005.9 1007.6 1013.2 1019.4 1023.0 1025.3 1017.0 MAX. QFF PRESSURE IN HPA 1043.6 1045.7 1041.9 1030.0 1026.2 1027.9 1017.1 1021.9 1027.9 1033.9 1038.4 1049.2 1049.2 YEAR-DAY 92- 5 97- 7 92-12 94- 5 94-18 93-22 94- 1 92-31 94-23 94-11 1-20 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1004.2 1001.2 998.9 1001.8 999.7 993.4 995.9 996.8 1000.5 1004.1 1003.4 1001.6 993.4 YEAR-DAY 0-21 1-21 3-26 3-20 99-20 99-25 98- 5 2-15 96- 8 3-27 1-18 88-27 99-25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.2 856.7 855.6 856.4 857.1 855.4 854.7 855.9 858.4 861.0 860.6 859.4 857.4 MAX. QFE PRESSURE IN HPA 870.0 868.0 867.8 866.8 866.0 869.0 862.5 865.6 869.5 871.3 872.0 870.5 872.0 YEAR-DAY 95- 7 94-18 95- 3 94- 5 94-18 93-22 93-27 92-31 94-23 94-11 87-30 87- 1 87-30 MIN. QFE PRESSURE IN HPA 843.0 840.0 840.0 844.2 846.7 844.2 846.0 848.1 849.8 849.8 843.8 838.8 838.8 YEAR-DAY 0-21 1-21 87-19 2- 3 1- 3 99-25 98- 5 2-15 96-21 3-27 1-18 88-27 88-27 MEAN QNH PRESSURE IN HPA 1022.2 1020.5 1019.2 1020.1 1020.9 1018.9 1018.1 1019.4 1022.4 1025.3 1024.9 1023.5 1021.3 MAX. QNH PRESSURE IN HPA 1035.7 1033.4 1033.2 1032.1 1031.1 1034.6 1027.1 1030.7 1035.2 1037.2 1038.0 1036.3 1038.0 YEAR-DAY 95- 7 94-18 95- 3 94- 5 94-18 93-22 93-27 92-31 94-23 94-11 87-30 87- 1 87-30 MIN. QNH PRESSURE IN HPA 1004.6 1001.2 1001.2 1006.0 1008.9 1006.0 1008.1 1010.5 1012.5 1012.5 1005.6 999.8 999.8 YEAR-DAY 0-21 1-21 87-19 2- 3 1- 3 99-25 98- 5 2-15 96-21 3-27 1-18 88-27 88-27 MEAN QFF PRESSURE IN HPA 1026.8 1025.2 1020.6 1017.3 1015.1 1009.0 1005.6 1007.0 1013.7 1020.7 1025.9 1029.3 1018.0 MAX. QFF PRESSURE IN HPA 1041.6 1044.9 1036.9 1030.0 1025.6 1019.4 1017.1 1015.6 1028.3 1032.8 1038.4 1049.1 1049.1 YEAR-DAY 0-31 97- 7 97-11 94- 5 94-18 95- 2 94- 1 94-15 94-23 94-11 96-18 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1008.0 1008.0 1006.7 1005.1 1002.8 997.8 995.3 997.1 1001.7 1008.0 1011.6 1013.8 995.3 YEAR-DAY 0-21 96- 9 97- 6 97-28 98-21 97-24 98- 5 97- 5 97- 2 98- 1 93-11 94- 3 98- 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 858.1 856.7 855.5 856.1 856.7 854.8 854.0 855.1 857.7 860.3 860.0 859.0 857.0 MAX. QFE PRESSURE IN HPA 870.0 868.8 868.0 867.1 866.0 868.2 862.3 864.8 869.7 871.6 871.5 871.0 871.6 YEAR-DAY 95- 7 94-18 95- 3 88- 8 92-14 93-22 93-27 92-31 94-23 94-11 94- 2 94- 7 94-11 MIN. QFE PRESSURE IN HPA 842.8 840.0 840.0 844.0 845.3 844.2 845.4 847.4 848.3 848.3 844.7 840.0 840.0 YEAR-DAY 92-30 3-19 87-19 97- 9 97- 4 99-25 2-24 2-15 96-21 3-29 1-18 88-27 87-19 MEAN QNH PRESSURE IN HPA 1022.1 1020.5 1019.0 1019.8 1020.4 1018.2 1017.3 1018.6 1021.6 1024.6 1024.3 1023.1 1020.8 MAX. QNH PRESSURE IN HPA 1035.7 1034.4 1033.4 1032.4 1031.1 1033.7 1026.9 1029.8 1035.4 1037.6 1037.5 1036.9 1037.6 YEAR-DAY 95- 7 94-18 95- 3 88- 8 92-14 93-22 93-27 92-31 94-23 94-11 94- 2 94- 7 94-11 MIN. QNH PRESSURE IN HPA 1004.4 1001.2 1001.2 1005.8 1007.3 1006.0 1007.4 1009.7 1010.7 1010.7 1006.6 1001.2 1001.2 YEAR-DAY 92-30 3-19 87-19 97- 9 97- 4 99-25 2-24 2-15 96-21 3-29 1-18 88-27 87-19 MEAN QFF PRESSURE IN HPA 1026.2 1024.8 1020.0 1016.5 1014.5 1008.4 1004.9 1005.9 1012.4 1019.4 1024.6 1027.4 1017.1 MAX. QFF PRESSURE IN HPA 1040.5 1044.4 1035.7 1029.7 1026.3 1019.2 1017.2 1014.6 1028.1 1032.5 1035.8 1049.1 1049.1 YEAR-DAY 94-19 97- 7 97-11 94- 5 94-18 95- 2 94- 1 95-24 94-23 94-11 96-18 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1008.1 1007.7 1004.5 1004.4 1002.6 997.9 994.4 996.5 1000.8 1005.4 1014.3 1011.9 994.4 YEAR-DAY 0-19 96- 9 97-19 96-13 97- 4 97-24 98- 5 97- 5 96-21 98- 1 95-23 94- 3 98- 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 857.1 855.6 854.4 855.3 855.9 853.9 852.8 853.9 856.5 859.3 859.0 858.2 856.0 MAX. QFE PRESSURE IN HPA 869.0 868.2 866.5 866.2 865.4 867.0 861.2 863.4 868.7 870.7 870.5 870.0 870.7 YEAR-DAY 94-18 98-22 95- 3 88- 8 92-14 93-22 93-27 92-31 94-23 94-11 94- 2 90-28 94-11 MIN. QFE PRESSURE IN HPA 841.0 840.1 840.0 843.8 845.0 843.7 845.4 846.4 848.4 849.0 845.8 840.5 840.0 YEAR-DAY 92-30 99-20 87-19 2- 3 1-29 99-24 0-10 2-15 96-21 3-29 1-17 88-26 87-19 MEAN QNH PRESSURE IN HPA 1020.9 1019.2 1017.8 1018.8 1019.5 1017.1 1015.9 1017.1 1020.2 1023.4 1023.1 1022.1 1019.6 MAX. QNH PRESSURE IN HPA 1034.6 1033.7 1031.7 1031.4 1030.4 1032.3 1025.6 1028.1 1034.2 1036.5 1036.3 1035.7 1036.5 YEAR-DAY 94-18 98-22 95- 3 88- 8 92-14 93-22 93-27 92-31 94-23 94-11 94- 2 90-28 94-11 MIN. QNH PRESSURE IN HPA 1002.3 1001.3 1001.2 1005.6 1006.9 1005.4 1007.4 1008.5 1010.9 1011.5 1007.9 1001.7 1001.2 YEAR-DAY 92-30 99-20 87-19 2- 3 1-29 99-24 0-10 2-15 96-21 3-29 1-17 88-26 87-19 MEAN QFF PRESSURE IN HPA 1024.7 1023.2 1019.0 1015.6 1013.7 1007.5 1003.7 1004.7 1011.4 1018.0 1023.6 1026.9 1016.0 MAX. QFF PRESSURE IN HPA 1039.2 1041.2 1034.5 1028.4 1025.8 1019.3 1016.2 1013.1 1026.5 1032.1 1035.1 1046.8 1046.8 YEAR-DAY 94-18 97- 7 97-10 94- 5 94-18 95- 2 94- 1 95-24 94-23 94-11 94- 9 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1008.8 1007.5 1005.2 1003.6 1002.8 995.7 994.6 995.8 1000.2 1005.3 1009.6 1011.8 994.6 YEAR-DAY 0-21 96- 9 97-19 98-21 97- 4 97-24 98- 5 98-20 97- 2 98- 1 93-10 94- 3 98- 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 857.2 855.8 854.4 855.2 855.6 853.5 852.3 853.6 856.5 859.4 859.1 858.5 855.9 MAX. QFE PRESSURE IN HPA 869.0 868.2 867.0 865.8 864.5 866.0 860.1 863.0 868.2 870.0 870.0 870.0 870.0 YEAR-DAY 94-18 98-22 90- 9 88- 8 95-22 93-22 93-27 92-31 94-23 94-11 94- 2 90-28 90-28 MIN. QFE PRESSURE IN HPA 840.2 840.7 839.0 843.4 844.8 843.2 844.7 846.4 848.1 848.5 844.9 840.5 839.0 YEAR-DAY 92-30 99-20 87-13 96-12 1-29 1-17 0-10 2-15 96-21 3-28 1-17 88-26 87-13 MEAN QNH PRESSURE IN HPA 1021.0 1019.4 1017.8 1018.7 1019.2 1016.7 1015.4 1016.9 1020.2 1023.5 1023.1 1022.5 1019.5 MAX. QNH PRESSURE IN HPA 1034.6 1033.7 1032.3 1030.9 1029.4 1031.1 1024.3 1027.7 1033.7 1035.7 1035.7 1035.7 1035.7 YEAR-DAY 94-18 98-22 90- 9 88- 8 95-22 93-22 93-27 92-31 94-23 94-11 94- 2 90-28 90-28 MIN. QNH PRESSURE IN HPA 1001.4 1002.0 1000.0 1005.1 1006.7 1004.9 1006.6 1008.5 1010.5 1011.0 1006.8 1001.7 1000.0 YEAR-DAY 92-30 99-20 87-13 96-12 1-29 1-17 0-10 2-15 96-21 3-28 1-17 88-26 87-13 MEAN QFF PRESSURE IN HPA 1026.2 1023.5 1019.1 1015.2 1013.0 1007.3 1003.6 1005.6 1011.8 1018.5 1022.4 1025.2 1016.0 MAX. QFF PRESSURE IN HPA 1043.3 1044.7 1041.0 1028.2 1027.0 1023.6 1015.9 1019.3 1027.4 1034.0 1035.9 1047.8 1047.8 YEAR-DAY 90-26 89- 8 92-12 94- 5 92- 2 93-22 94- 1 92-31 94-23 90-15 1-20 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1006.4 1004.6 1001.5 1000.4 999.6 993.6 993.3 995.7 1001.0 1004.2 1004.5 1003.5 993.3 YEAR-DAY 2- 7 3-19 2-26 3-20 1-29 99-24 99-21 2-14 0- 2 3-28 1-17 88-26 99-21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 858.2 857.0 855.2 856.2 857.3 854.3 852.8 854.4 857.8 860.5 861.0 861.3 857.2 MAX. QFE PRESSURE IN HPA 870.0 868.5 865.5 865.0 865.0 860.5 859.7 860.5 868.5 870.2 869.9 870.0 870.2 YEAR-DAY 94-18 94-18 95- 2 94- 4 94-17 95- 1 94- 1 94-14 94-23 94-10 94- 2 94- 7 94-10 MIN. QFE PRESSURE IN HPA 844.2 843.6 843.0 842.4 848.7 846.4 845.9 847.5 848.6 850.8 851.0 848.8 842.4 YEAR-DAY 97-15 96- 1 97-28 96-12 97- 4 97-23 98- 4 97- 5 96-21 96-26 93-10 94- 3 96-12 MEAN QNH PRESSURE IN HPA 1022.1 1020.8 1018.7 1019.9 1021.1 1017.6 1015.9 1017.7 1021.6 1024.8 1025.4 1025.7 1020.9 MAX. QNH PRESSURE IN HPA 1035.7 1034.0 1030.6 1030.0 1030.0 1024.8 1023.9 1024.8 1034.0 1036.0 1035.6 1035.7 1036.0 YEAR-DAY 94-18 94-18 95- 2 94- 4 94-17 95- 1 94- 1 94-14 94-23 94-10 94- 2 94- 7 94-10 MIN. QNH PRESSURE IN HPA 1006.0 1005.3 1004.6 1003.9 1011.2 1008.5 1008.0 1009.8 1011.1 1013.6 1013.8 1011.3 1003.9 YEAR-DAY 97-15 96- 1 97-28 96-12 97- 4 97-23 98- 4 97- 5 96-21 96-26 93-10 94- 3 96-12 MEAN QFF PRESSURE IN HPA 1026.3 1024.7 1019.8 1016.6 1014.1 1007.6 1003.9 1005.5 1012.6 1019.5 1025.2 1028.8 1017.1 MAX. QFF PRESSURE IN HPA 1042.3 1042.6 1036.4 1028.4 1025.2 1019.6 1014.9 1012.8 1026.7 1031.9 1036.2 1047.6 1047.6 YEAR-DAY 94-18 97- 6 97-10 94- 4 94-17 94-28 94- 1 94-14 94-23 94-11 94- 9 94- 6 94- 6 MIN. QFF PRESSURE IN HPA 1007.2 1006.1 1007.1 1000.7 1001.7 996.8 995.4 996.8 1002.1 1006.7 1011.0 1014.6 995.4 YEAR-DAY 97-15 96- 1 97-25 96-12 96-24 97-23 98- 4 97- 5 97- 2 98- 1 93-10 99-15 98- 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 858.1 857.2 855.4 856.4 857.7 854.7 853.4 854.7 858.0 860.7 861.2 860.7 857.4 MAX. QFE PRESSURE IN HPA 870.0 868.5 866.0 865.3 865.6 861.2 860.0 861.2 868.9 870.6 870.0 870.0 870.6 YEAR-DAY 94-18 94-18 95- 2 94- 4 94-17 95- 1 94- 1 94-14 94-23 94-10 94- 1 94- 6 94-10 MIN. QFE PRESSURE IN HPA 843.0 845.3 843.2 841.8 848.4 846.4 846.5 848.1 846.7 850.5 852.0 849.0 841.8 YEAR-DAY 97-15 96- 1 97-28 96-12 97- 3 97-23 98- 4 97- 5 96-21 96-26 95-23 94- 3 96-12 MEAN QNH PRESSURE IN HPA 1022.1 1021.0 1018.9 1020.0 1021.5 1018.2 1016.6 1018.2 1021.9 1025.0 1025.6 1025.1 1021.2 MAX. QNH PRESSURE IN HPA 1035.7 1034.0 1031.1 1030.3 1030.7 1025.6 1024.2 1025.6 1034.5 1036.4 1035.7 1035.7 1036.4 YEAR-DAY 94-18 94-18 95- 2 94- 4 94-17 95- 1 94- 1 94-14 94-23 94-10 94- 1 94- 6 94-10 MIN. QNH PRESSURE IN HPA 1004.6 1007.3 1004.9 1003.2 1010.9 1008.5 1008.7 1010.5 1008.9 1013.3 1015.0 1011.5 1003.2 YEAR-DAY 97-15 96- 1 97-28 96-12 97- 3 97-23 98- 4 97- 5 96-21 96-26 95-23 94- 3 96-12 MEAN QFF PRESSURE IN HPA 1025.7 1024.2 1019.3 1016.2 1014.2 1008.0 1004.5 1005.6 1012.3 1019.0 1024.3 1027.1 1016.7 MAX. QFF PRESSURE IN HPA 1042.4 1042.0 1036.2 1027.6 1026.4 1020.2 1015.1 1013.8 1026.4 1031.4 1035.8 1048.4 1048.4 YEAR-DAY 94-18 97- 6 97-10 96- 3 94-17 94-28 94- 2 95-24 94-23 94-10 96-17 94- 6 94- 6 MIN. QFF PRESSURE IN HPA 1006.0 1009.1 1005.8 999.6 1001.4 996.9 995.6 996.5 999.3 1006.7 1011.3 1014.9 995.6 YEAR-DAY 94-31 96- 1 97-28 96-12 96-24 97-23 98- 5 96- 7 96-21 98- 1 95-23 99-13 98- 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 6.2 12.5 15.1 21.0 27.3 26.4 23.6 ***** 5.3 -1.2 ****** 1987 4.3 ***** 4.2 12.5 21.1 25.9 28.3 27.8 23.9 ***** ***** ***** ****** 1988 ***** ***** 5.5 11.9 17.9 22.0 25.2 24.4 21.8 15.6 7.0 1.8 ****** 1989 -8.1 -6.7 5.9 15.3 18.7 24.1 28.8 26.5 21.5 16.5 8.8 3.2 12.9 1990 -3.7 -1.0 5.4 10.4 17.7 23.5 27.1 25.7 22.8 15.2 11.4 4.0 13.2 1991 -2.4 ***** 6.5 13.9 16.9 23.3 26.9 27.5 22.3 15.4 9.0 -1.4 ****** 1992 -5.5 -3.4 -1.6 9.5 13.2 20.7 25.5 23.8 20.4 15.9 7.0 0.5 10.5 1993 -2.6 -1.9 3.9 10.7 15.2 21.9 26.0 25.1 22.8 14.3 5.1 0.5 11.8 1994 1.5 1.5 6.1 12.6 16.0 20.7 24.2 24.6 19.0 13.7 7.4 -2.5 12.1 1995 2.1 1.9 6.3 10.2 16.6 20.2 24.4 25.6 20.4 13.2 6.7 1.1 12.4 1996 -2.5 2.9 4.0 9.7 17.6 20.9 25.9 25.7 21.6 13.7 7.0 5.7 12.7 1997 -0.7 -5.0 0.1 9.5 16.3 21.3 24.4 25.5 19.8 15.7 7.9 3.7 11.6 1998 -3.2 -1.5 5.5 11.9 16.4 23.3 25.5 26.6 21.7 15.2 12.2 7.4 13.4 1999 1.2 4.3 6.7 13.4 19.6 25.0 26.7 29.1 22.9 17.4 7.5 4.0 14.8 2000 -1.3 -1.0 5.6 14.8 19.2 23.1 29.9 28.1 23.1 14.4 7.3 3.1 13.9 2001 1.0 2.8 10.9 14.7 18.1 24.7 27.7 28.7 23.9 16.4 7.6 4.7 15.1 2002 -1.0 3.0 8.9 11.4 17.6 23.9 27.2 26.8 24.3 18.4 9.2 -1.0 14.1 2003 1.5 1.7 4.4 12.6 18.5 23.3 27.4 28.3 22.8 18.3 7.9 2.2 14.1 MEAN -1.2 -0.2 5.3 12.1 17.3 22.7 26.6 26.5 22.2 15.6 7.9 2.1 13.1 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** -2.3 -0.2 6.3 6.4 10.0 16.2 15.0 11.6 ***** 0.4 -6.5 ****** 1987 -1.9 0.6 -1.1 3.6 9.1 11.4 15.8 14.3 10.8 5.7 2.2 -1.5 5.8 1988 -6.1 -6.2 -0.1 5.1 9.1 11.7 15.8 15.7 10.5 8.0 0.1 -4.5 4.9 1989 -14.0 -13.5 1.4 6.8 9.1 10.9 16.9 14.1 10.6 9.7 4.3 -1.4 4.6 1990 -8.5 -4.7 0.1 3.9 8.0 12.4 16.9 14.3 10.2 6.7 2.6 -2.5 5.0 1991 -7.8 -7.0 0.7 5.2 8.3 12.5 16.8 16.5 11.7 8.0 3.4 -4.4 5.3 1992 -10.2 -7.2 -7.9 3.5 7.8 11.2 14.0 15.0 10.1 6.5 1.6 -3.4 3.4 1993 -6.9 -6.2 -1.2 5.0 9.4 12.4 16.5 15.5 12.1 6.3 1.9 -2.9 5.2 1994 -1.6 -1.8 1.9 6.6 9.3 13.1 16.2 15.9 12.2 8.0 3.6 -5.5 6.5 1995 -1.2 -2.0 0.7 5.0 10.1 12.8 15.9 15.6 12.5 5.9 1.5 -3.1 6.1 1996 -5.6 -0.7 0.4 5.1 11.2 13.1 18.0 16.7 13.7 7.9 1.0 2.3 6.9 1997 -5.0 -10.1 -3.6 4.2 9.7 13.0 15.7 15.9 12.8 9.4 3.1 -0.3 5.4 1998 -7.0 -6.3 1.0 6.0 9.5 14.8 18.3 18.4 14.2 7.8 6.4 1.9 7.1 1999 -2.4 -1.0 0.6 6.4 10.0 15.6 17.8 19.6 13.8 10.4 2.7 -0.4 7.7 2000 -4.9 -4.7 -0.3 7.7 10.3 13.8 19.9 18.6 13.9 7.6 2.0 -0.4 7.0 2001 -3.0 -1.1 4.4 7.5 9.6 14.5 19.6 19.1 14.8 9.4 2.0 1.4 8.2 2002 -5.2 -2.0 2.8 6.9 9.3 14.5 17.8 17.1 13.6 10.7 3.4 -4.6 7.0 2003 -2.1 -1.8 0.3 7.3 9.9 13.9 18.1 18.4 14.5 11.3 3.5 -0.7 7.7 MEAN -5.5 -4.3 -0.0 5.7 9.2 12.9 17.0 16.4 12.4 8.2 2.5 -2.0 6.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** 7.8 8.8 15.6 19.6 26.0 32.8 32.0 29.6 ***** 8.1 1.9 ****** 1987 7.6 8.6 6.8 15.2 24.1 29.1 31.4 30.8 27.3 15.9 ***** 6.7 ****** 1988 0.8 2.0 7.9 15.0 21.9 26.8 30.0 28.9 27.5 20.2 11.6 5.8 16.5 1989 -3.2 -1.4 9.1 20.6 23.5 29.4 34.8 32.5 26.9 20.8 12.2 7.5 17.7 1990 0.1 2.2 10.1 14.8 22.3 28.7 32.5 31.9 29.3 20.0 16.0 6.7 17.9 1991 0.7 2.3 9.0 17.7 21.2 28.4 32.3 33.5 28.3 20.7 13.3 1.2 17.4 1992 -2.0 -0.2 2.7 13.3 16.8 25.2 30.9 28.6 26.0 21.5 11.6 2.9 14.8 1993 -0.1 1.1 7.6 15.0 19.0 26.5 31.4 30.6 29.0 19.8 8.8 4.4 16.1 1994 5.2 5.5 10.6 18.6 22.1 27.3 30.8 31.8 25.8 20.3 11.7 1.2 17.6 1995 6.1 6.5 12.1 15.5 22.1 26.5 31.6 34.0 27.8 20.6 12.7 6.3 18.5 1996 0.9 7.6 8.2 14.9 23.2 27.3 32.7 33.1 28.4 20.0 13.9 10.0 18.4 1997 4.6 1.1 4.4 15.1 22.9 28.4 31.4 33.4 26.2 21.5 11.9 7.3 17.3 1998 0.4 2.4 9.5 17.6 22.7 30.3 31.8 33.9 28.8 22.3 17.6 11.8 19.1 1999 4.7 8.6 11.5 17.9 25.2 29.8 31.8 34.4 28.3 21.9 12.8 9.4 19.7 2000 2.7 3.7 10.0 19.1 23.7 29.5 34.7 33.3 28.6 19.0 11.2 6.4 18.5 2001 4.4 6.1 15.5 19.0 22.5 29.5 32.3 34.0 29.3 21.3 11.9 7.4 19.4 2002 2.5 7.0 13.5 14.7 22.2 28.3 31.8 32.2 30.4 24.0 13.8 2.0 18.5 2003 4.9 4.9 7.7 16.4 23.0 28.1 32.3 33.6 28.2 23.1 11.6 4.7 18.2 MEAN 2.4 4.2 9.2 16.4 22.1 28.1 32.1 32.4 28.1 20.7 12.4 5.8 17.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** 10.1 9.0 9.3 13.2 16.0 16.6 17.0 18.0 ***** 7.7 8.4 ****** 1987 9.5 8.0 7.9 11.6 15.0 17.7 15.6 16.5 16.5 10.2 ***** 8.2 ****** 1988 6.9 8.2 8.0 9.9 12.8 15.1 14.2 13.2 17.0 12.2 11.5 10.3 11.6 1989 10.8 12.1 7.7 13.8 14.4 18.5 17.9 18.4 16.3 11.1 7.9 8.9 13.1 1990 8.6 6.9 10.0 10.9 14.3 16.3 15.6 17.6 19.1 13.3 13.4 9.2 12.9 1991 8.5 9.3 8.3 12.5 12.9 15.9 15.5 17.0 16.6 12.7 9.9 5.6 12.1 1992 8.2 7.0 10.6 9.8 9.0 14.0 16.9 13.6 15.9 15.0 10.0 6.3 11.4 1993 6.8 7.3 8.8 10.0 9.6 14.1 14.9 15.1 16.9 13.5 6.9 7.3 10.9 1994 6.8 7.3 8.7 12.0 12.8 14.2 14.6 15.9 13.6 12.3 8.1 6.7 11.1 1995 7.3 8.5 11.4 10.5 12.0 13.7 15.7 18.4 15.3 14.7 11.2 9.4 12.4 1996 6.5 8.3 7.8 9.8 12.0 14.2 14.7 16.4 14.7 12.1 12.9 7.7 11.5 1997 9.6 11.2 8.0 10.9 13.2 15.4 15.7 17.5 13.4 12.1 8.8 7.6 11.9 1998 7.4 8.7 8.5 11.6 13.2 15.5 13.5 15.5 14.6 14.5 11.2 9.9 12.0 1999 7.1 9.6 10.9 11.5 15.2 14.2 14.0 14.8 14.5 11.5 10.1 9.8 12.0 2000 7.6 8.4 10.3 11.4 13.4 15.7 14.8 14.7 14.7 11.4 9.2 6.8 11.5 2001 7.4 7.2 11.1 11.5 12.9 15.0 12.7 14.9 14.5 11.9 9.9 6.0 11.2 2002 7.7 9.0 10.7 7.8 12.9 13.8 14.0 15.1 16.8 13.3 10.4 6.6 11.5 2003 7.0 6.7 7.4 9.1 13.1 14.2 14.2 15.2 13.7 11.8 8.1 5.4 10.5 MEAN 7.9 8.5 9.2 10.7 12.9 15.2 15.1 16.0 15.7 12.5 9.9 7.8 11.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** 2.7 4.3 10.9 13.0 18.0 24.5 23.5 20.6 ***** 4.2 -2.3 ****** 1987 2.9 4.6 2.9 9.4 16.6 20.2 23.6 22.5 19.0 10.8 ***** 2.6 ****** 1988 -2.7 -2.1 3.9 10.1 15.5 19.2 22.9 22.3 19.0 14.1 5.9 0.7 10.7 1989 -8.6 -7.5 5.3 13.7 16.3 20.2 25.8 23.3 18.8 15.2 8.3 3.1 11.2 1990 -4.2 -1.2 5.1 9.4 15.1 20.6 24.7 23.1 19.8 13.4 9.3 2.1 11.4 1991 -3.5 -2.4 4.9 11.4 14.7 20.4 24.5 25.0 20.0 14.4 8.3 -1.6 11.4 1992 -6.1 -3.7 -2.6 8.4 12.3 18.2 22.5 21.8 18.0 14.0 6.6 -0.3 9.1 1993 -3.5 -2.5 3.2 10.0 14.2 19.5 23.9 23.0 20.6 13.0 5.3 0.7 10.6 1994 1.8 1.9 6.2 12.6 15.7 20.2 23.5 23.8 19.0 14.1 7.7 -2.2 12.0 1995 2.5 2.3 6.4 10.3 16.1 19.7 23.8 24.8 20.2 13.2 7.1 1.6 12.3 1996 -2.3 3.4 4.3 10.0 17.2 20.2 25.3 24.9 21.0 14.0 7.4 6.1 12.6 1997 -0.2 -4.5 0.4 9.7 16.3 20.7 23.6 24.7 19.5 15.5 7.5 3.5 11.4 1998 -3.3 -1.9 5.2 11.8 16.1 22.5 25.1 26.2 21.5 15.1 12.0 6.9 13.1 1999 1.2 3.8 6.0 12.2 17.6 22.7 24.8 27.0 21.0 16.1 7.8 4.5 13.7 2000 -1.1 -0.5 4.9 13.4 17.0 21.7 27.3 25.9 21.3 13.3 6.6 3.0 12.7 2001 0.7 2.5 9.9 13.2 16.0 22.0 26.0 26.6 22.1 15.3 7.0 4.4 13.8 2002 -1.4 2.5 8.1 10.8 15.7 21.4 24.8 24.6 22.0 17.3 8.6 -1.3 12.8 2003 1.4 1.6 4.0 11.9 16.4 21.0 25.2 26.0 21.4 17.2 7.5 2.0 13.0 MEAN -1.6 -0.1 4.6 11.1 15.7 20.5 24.5 24.4 20.3 14.5 7.5 1.9 11.9 SD 3.17 3.35 2.72 1.54 1.38 1.30 1.18 1.56 1.19 1.61 1.70 2.73 1.95 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** -7.5 -6.5 0.0 2.0 5.0 12.0 11.5 9.4 ***** -5.0 -19.0 ****** DAY ** 11 3 1 15 22 1 26 20 ** 15 5 1987 -7.4 -9.0 -8.0 -3.5 2.5 7.0 12.0 9.2 5.5 1.0 -7.0 -17.0 -17.0 DAY 12 11 20 21 4 6 9 25 24 12 30 31 1988 -22.0 -18.7 -10.0 -1.3 3.2 7.6 11.4 9.4 7.4 1.0 -12.0 -22.0 -22.0 DAY 20 27 6 1 7 26 2 31 7 23 15 29 1989 -28.6 -25.0 -5.2 2.0 4.0 4.0 10.4 8.8 5.0 3.0 -5.0 -9.0 -28.6 DAY 5 15 30 3 12 21 1 16 21 25 22 6 1990 -20.0 -15.0 -9.0 -2.0 1.0 8.2 12.6 10.2 6.8 3.0 -4.2 -20.0 -20.0 DAY 26 1 17 4 8 28 8 25 18 17 14 29 1991 -22.0 -17.0 -11.0 -3.0 3.0 8.0 13.0 8.8 7.4 2.6 -2.0 -14.0 -22.0 DAY 25 5 11 20 3 3 8 31 28 30 23 7 1992 -20.6 -21.6 -20.0 -5.8 0.6 7.6 10.4 11.0 5.6 1.0 -17.0 -18.4 -21.6 DAY 28 29 2 3 6 5 1 30 29 30 27 27 1993 -16.0 -18.0 -6.0 -1.0 3.6 8.0 11.4 11.0 8.4 0.5 -10.8 -11.4 -18.0 DAY 20 18 22 23 4 6 6 13 25 22 14 20 1994 -7.0 -7.6 -2.0 0.8 5.0 9.4 11.0 11.6 9.0 5.0 -3.0 -18.0 -18.0 DAY 25 4 2 4 7 30 1 3 22 11 9 22 1995 -7.4 -8.4 -3.4 -1.0 4.6 9.6 12.0 12.0 5.6 2.6 -8.0 -9.8 -9.8 DAY 23 10 1 6 8 6 3 17 22 15 27 20 1996 -15.4 -10.0 -3.0 0.6 7.0 7.4 14.0 13.0 9.0 -0.4 -3.8 -2.6 -15.4 DAY 22 3 17 15 1 7 1 24 23 31 13 19 1997 -19.6 -23.0 -15.2 -6.0 4.2 8.4 12.0 12.0 7.6 3.6 -2.0 -7.4 -23.0 DAY 29 1 8 11 6 7 17 17 15 25 28 29 1998 -21.0 -17.6 -6.4 -0.8 4.4 9.8 15.0 15.2 10.0 3.8 1.4 -4.0 -21.0 DAY 14 21 3 1 4 4 26 21 27 27 25 20 1999 -8.0 -5.0 -3.8 1.4 2.6 10.0 13.6 14.8 9.0 3.6 -4.0 -4.4 -8.0 DAY 14 23 28 10 21 5 15 31 24 14 30 5 2000 -19.6 -14.4 -6.4 -1.0 5.4 8.8 16.0 12.0 10.0 2.2 -1.6 -6.0 -19.6 DAY 18 1 16 2 1 14 1 30 29 29 29 27 2001 -15.4 -11.0 -1.0 3.0 5.0 10.0 13.0 14.0 11.4 3.8 -16.4 -7.4 -16.4 DAY 30 1 12 13 6 1 19 23 15 27 20 22 2002 -17.4 -9.0 -4.2 2.6 4.8 7.6 15.0 13.2 11.4 5.0 -2.0 -17.6 -17.6 DAY 25 5 1 22 5 4 5 23 17 23 30 27 2003 -15.0 -7.0 -10.0 0.6 4.8 7.6 14.2 14.6 10.2 6.0 -2.2 -10.2 -15.0 DAY 1 19 2 1 1 1 10 27 9 31 17 25 1986-2003 -28.6 -25.0 -20.0 -6.0 0.6 4.0 10.4 8.8 5.0 -0.4 -17.0 -22.0 -28.6 YEAR-DAY 89- 5 89-15 92- 2 97-11 92- 6 89-21 89- 1 89-16 89-21 96-31 92-27 88-29 89 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M TEMPERATURE RECORDS HIGHEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** 12.2 17.5 21.0 25.0 31.0 36.0 35.4 32.5 ***** 16.0 10.0 ****** DAY ** 24 29 23 21 30 7 2 3 ** 1 26 1987 14.8 16.6 12.5 25.0 27.8 33.4 35.6 34.8 31.4 27.6 ***** 11.2 ****** DAY 17 3 24 30 8 24 15 11 9 2 ** 11 1988 5.0 8.8 14.5 20.2 27.2 32.0 36.8 34.4 31.8 24.8 18.8 15.0 36.8 DAY 25 29 19 20 18 12 31 12 15 28 3 5 1989 4.0 10.0 17.0 25.0 29.0 34.4 39.0 36.0 34.0 27.6 17.0 13.0 39.0 DAY 20 27 24 29 24 29 21 7 3 6 4 27 1990 4.0 8.0 15.4 25.0 28.8 32.0 37.0 35.4 31.0 26.2 22.0 16.0 37.0 DAY 2 28 31 26 31 12 16 5 9 7 3 2 1991 5.6 8.6 21.0 25.0 25.2 36.0 38.0 39.0 34.0 25.6 17.2 10.0 39.0 DAY 4 28 30 25 27 30 30 1 1 6 2 9 1992 3.0 4.4 11.2 19.4 27.6 30.4 34.8 33.6 32.0 25.4 19.8 9.6 34.8 DAY 20 20 30 12 29 29 30 16 8 4 2 11 1993 8.0 11.6 19.2 24.0 24.0 33.0 35.4 34.6 32.4 26.0 19.6 10.0 35.4 DAY 28 28 31 19 31 30 16 31 1 1 8 28 1994 11.6 11.4 17.4 26.0 30.0 32.2 35.4 35.0 30.4 23.4 19.0 8.2 35.4 DAY 3 27 31 21 28 10 15 18 12 6 3 2 1995 11.0 11.6 16.8 20.0 27.4 31.4 34.8 37.2 34.6 28.2 19.0 11.6 37.2 DAY 31 28 22 29 25 20 26 5 3 2 21 30 1996 11.2 14.0 15.0 23.0 28.4 35.6 36.0 36.4 33.4 28.4 18.0 14.4 36.4 DAY 1 25 30 30 27 30 21 1 2 3 3 2 1997 12.4 9.4 11.0 28.0 28.0 32.0 36.2 36.0 30.8 27.4 16.4 13.4 36.2 DAY 14 19 31 25 27 22 28 26 19 17 16 7 1998 4.4 10.6 15.0 26.6 30.0 35.4 36.0 38.4 36.4 28.2 21.4 19.4 38.4 DAY 26 6 12 15 9 23 18 29 1 6 6 10 1999 10.4 14.0 17.4 23.4 32.0 33.8 36.6 38.0 32.4 30.4 19.0 17.0 38.0 DAY 31 28 7 25 30 20 20 2 4 1 21 31 2000 17.4 12.0 18.0 24.6 28.6 34.8 37.6 38.0 34.4 25.2 16.8 11.8 38.0 DAY 2 24 31 14 25 30 16 2 9 11 12 1 2001 11.6 13.4 23.6 24.4 28.0 35.2 37.2 38.0 32.4 28.6 21.4 12.6 38.0 DAY 10 28 28 30 28 22 28 1 2 5 4 31 2002 10.4 13.4 20.0 20.0 29.4 33.0 34.8 36.4 34.2 29.8 19.0 11.8 36.4 DAY 1 22 11 29 28 27 23 14 3 1 9 6 2003 14.4 11.0 13.2 23.6 27.0 32.2 36.0 39.0 34.4 28.2 20.2 11.4 39.0 DAY 8 8 16 5 16 29 16 11 5 9 6 17 1986-2003 17.4 16.6 23.6 28.0 32.0 36.0 39.0 39.0 36.4 30.4 22.0 19.4 39.0 YEAR-DAY 0- 2 87- 3 1-28 97-25 99-30 91-30 89-21 91- 1 98- 1 99- 1 90- 3 98-10 89 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 8 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M 0C COOLING DEGREE DAYS (BASE 21) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** 0.0 0.0 0.0 0.0 0.0 109.5 77.5 9.3 ***** 0.0 0.0 ****** 1987 0.0 0.0 0.0 0.0 0.0 16.0 79.6 61.6 4.0 0.0 0.0 0.0 ****** 1988 0.0 0.0 0.0 0.0 0.0 4.7 63.2 50.3 1.0 0.0 0.0 0.0 119.2 1989 0.0 0.0 0.0 0.0 0.0 14.4 150.2 73.0 15.4 1.4 0.0 0.0 254.5 1990 0.0 0.0 0.0 0.0 0.7 17.2 115.5 64.6 2.4 0.0 0.0 0.0 200.4 1991 0.0 0.0 0.0 0.0 0.0 25.9 109.6 125.4 11.7 0.0 0.0 0.0 272.6 1992 0.0 0.0 0.0 0.0 0.0 0.4 49.7 37.5 3.0 0.0 0.0 0.0 90.6 1993 0.0 0.0 0.0 0.0 0.0 10.2 93.1 62.1 13.2 0.0 0.0 0.0 178.7 1994 0.0 0.0 0.0 0.0 1.5 14.3 79.9 87.7 1.3 0.0 0.0 0.0 184.7 1995 0.0 0.0 0.0 0.0 0.0 9.2 87.7 117.6 32.1 0.0 0.0 0.0 246.6 1996 0.0 0.0 0.0 0.0 4.0 14.4 134.6 120.6 26.5 0.0 0.0 0.0 300.1 1997 0.0 0.0 0.0 0.0 0.0 24.4 80.3 113.7 7.8 0.0 0.0 0.0 226.2 1998 0.0 0.0 0.0 0.0 0.4 57.2 125.8 159.8 35.6 0.0 0.0 0.0 378.8 1999 0.0 0.0 0.0 0.0 5.9 54.8 119.9 185.1 29.3 0.7 0.0 0.0 395.7 2000 0.0 0.0 0.0 0.0 0.0 35.3 195.7 152.9 23.2 0.0 0.0 0.0 407.1 2001 0.0 0.0 0.0 0.0 0.0 43.6 154.9 172.5 36.3 0.0 0.0 0.0 407.3 2002 0.0 0.0 0.0 0.0 0.0 33.3 117.7 112.8 32.5 5.8 0.0 0.0 302.1 2003 0.0 0.0 0.0 0.0 0.0 31.5 129.4 155.6 36.4 0.0 0.0 0.0 352.9 MEAN 0.0 0.0 0.0 0.0 0.7 22.6 110.9 107.2 17.8 0.5 0.0 0.0 259.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 9 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M 0C HEATING DEGREE DAYS (BASE 18) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** 251.9 424.5 207.0 154.2 18.1 0.0 0.0 0.5 ***** 398.5 629.7 ****** 1987 469.5 375.1 469.3 256.8 49.8 1.0 0.0 0.0 12.1 169.1 81.9 290.6 ****** 1988 640.6 582.5 436.0 238.4 82.3 7.0 0.0 0.1 5.7 121.6 364.2 517.6 2996.1 1989 796.5 713.7 394.3 128.8 61.6 4.3 0.0 0.0 30.8 101.6 292.4 448.1 2972.2 1990 687.2 538.9 399.8 260.5 98.6 0.0 0.0 0.0 0.0 138.2 260.7 492.6 2876.5 1991 668.0 569.9 407.4 197.8 100.8 6.0 0.0 0.0 7.1 114.0 289.7 608.8 2969.5 1992 748.3 629.6 638.9 277.0 180.2 20.2 0.0 0.4 34.6 124.4 342.4 566.7 3562.8 1993 666.5 574.8 458.6 240.1 122.5 9.0 0.0 0.0 2.9 156.5 380.1 535.2 3146.2 1994 501.2 451.9 364.5 163.6 92.9 10.5 0.0 0.0 4.4 119.6 309.7 625.3 2643.6 1995 481.7 440.8 359.4 232.2 67.1 7.0 0.0 0.0 23.1 148.0 327.7 509.6 2596.6 1996 630.3 422.6 423.9 239.1 46.9 4.7 0.0 0.0 4.2 129.5 316.6 367.7 2585.5 1997 563.8 630.0 545.5 252.4 64.2 3.9 0.0 0.0 7.7 82.8 316.0 449.7 2916.0 1998 661.2 558.1 396.4 186.4 73.3 1.4 0.0 0.0 2.6 94.3 180.2 345.1 2498.9 1999 522.1 397.8 370.6 174.8 43.0 0.0 0.0 0.0 4.5 78.4 306.9 418.6 2316.7 2000 593.5 537.0 407.2 139.9 42.5 2.3 0.0 0.0 1.5 145.9 342.4 464.4 2676.6 2001 536.2 433.8 250.4 144.4 67.8 0.5 0.0 0.0 0.0 92.4 331.4 420.2 2277.1 2002 600.8 434.6 305.5 216.8 80.7 0.7 0.0 0.0 0.0 50.1 283.0 599.1 2571.3 2003 514.5 459.6 434.0 184.4 56.0 8.8 0.0 0.0 0.4 39.2 313.8 496.2 2506.9 MEAN 604.8 500.2 415.9 207.8 82.5 5.9 0.0 0.0 7.9 112.1 302.1 488.1 2727.3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 10 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** -1.2 6.1 6.6 7.0 10.2 7.9 0.4 ***** 2.0 -5.6 ****** 1987 -3.5 ***** -2.3 0.2 6.1 ***** 7.1 7.5 7.6 ***** ***** ***** ****** 1988 ***** ***** -0.2 5.0 8.2 11.0 14.9 13.6 5.6 4.3 -1.9 -3.6 ****** 1989 -12.3 -12.7 -1.4 1.4 3.8 4.5 11.4 11.4 9.4 1.6 2.8 -3.4 1.4 1990 -8.2 -5.7 -2.5 0.9 3.7 5.8 8.7 6.0 1.5 3.2 -0.2 -2.6 0.9 1991 -5.2 ***** -0.0 2.9 5.0 7.8 8.6 7.8 2.7 4.3 0.8 -4.8 ****** 1992 -9.8 -7.0 -6.8 1.0 6.7 7.4 7.5 8.6 2.9 1.3 1.4 -4.6 0.7 1993 -6.5 -6.6 -4.0 1.6 5.4 5.9 8.8 7.4 1.6 1.8 -0.9 -4.0 0.9 1994 -5.0 -5.1 -0.8 3.4 4.6 6.4 8.9 6.5 4.4 4.5 1.0 -8.7 1.7 1995 -4.2 -3.8 -1.8 1.9 5.9 8.6 8.3 6.7 4.1 1.1 -2.4 -5.5 1.6 1996 -6.5 -3.7 -1.7 0.6 5.5 5.1 8.8 5.1 4.4 3.2 -1.8 -1.0 1.5 1997 -7.0 -9.9 -4.2 0.2 5.1 7.0 6.8 7.4 6.2 6.0 2.8 -2.1 1.5 1998 -6.5 -7.0 -0.7 3.3 6.6 7.2 9.3 6.8 3.3 0.5 0.9 -2.0 1.8 1999 -3.0 -3.1 -1.6 0.6 2.5 5.1 7.1 5.4 3.6 1.2 -2.0 -2.8 1.1 2000 -7.1 -9.0 -5.1 1.8 3.3 3.1 5.2 3.1 1.4 1.8 -0.6 -2.0 -0.3 2001 -5.0 -3.9 -0.0 2.0 2.8 3.0 8.5 5.0 2.6 1.7 -1.7 -1.8 1.1 2002 -6.5 -5.5 -2.5 2.6 4.0 3.2 7.1 5.3 1.1 3.6 -0.8 -5.5 0.5 2003 -5.4 -5.2 -2.9 2.2 4.9 8.3 8.7 6.3 4.2 2.4 -0.0 -2.2 1.8 MEAN -6.4 -6.3 -2.2 2.1 5.0 6.3 8.7 7.1 3.7 2.7 -0.0 -3.6 1.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 11 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 4.27 7.06 7.33 7.63 9.41 8.22 4.77 ***** 5.27 3.07 ***** 1987 3.51 ***** 3.90 4.73 7.16 ***** 7.65 7.78 7.74 ***** ***** ***** ***** 1988 ***** ***** 4.58 6.66 8.20 9.84 12.80 11.84 6.88 6.17 4.13 3.66 ***** 1989 1.86 1.82 4.13 5.04 6.00 6.40 10.62 10.45 9.01 5.25 5.63 3.56 5.81 1990 2.54 3.04 3.85 4.88 6.10 6.99 8.50 7.22 5.13 5.73 4.53 3.97 5.21 1991 3.13 ***** 4.67 5.62 6.55 7.96 8.55 8.26 5.74 6.23 4.90 3.33 ***** 1992 2.37 2.82 2.88 4.89 7.36 7.79 7.90 8.47 5.62 5.02 5.49 3.40 5.33 1993 2.87 2.90 3.42 5.12 6.76 7.01 8.52 7.81 5.30 5.21 4.43 3.39 5.23 1994 3.15 3.23 4.30 5.86 6.38 7.23 8.62 7.53 6.47 6.34 4.94 2.54 5.55 1995 3.33 3.46 4.02 5.28 6.96 8.34 8.44 7.63 6.16 4.87 3.96 3.03 5.46 1996 2.90 3.51 4.04 4.81 6.80 6.73 8.66 6.71 6.30 5.85 4.06 4.26 5.38 1997 2.89 2.42 3.45 4.72 6.62 7.62 7.71 7.88 7.08 6.92 5.55 3.95 5.57 1998 2.88 2.80 4.41 5.80 7.31 7.67 8.88 7.55 5.86 4.72 4.92 3.96 5.56 1999 3.65 3.64 4.08 4.78 5.57 6.66 7.71 6.94 5.97 5.02 3.98 3.72 5.14 2000 2.80 2.40 3.25 5.27 5.83 5.84 6.82 6.03 5.22 5.23 4.39 3.93 4.75 2001 3.19 3.44 4.57 5.28 5.64 5.75 8.36 6.69 5.54 5.18 4.20 4.12 5.16 2002 2.94 3.13 3.88 5.55 6.10 5.88 7.63 6.85 4.93 5.86 4.35 3.23 5.03 2003 3.10 3.13 3.80 5.42 6.70 8.28 8.62 7.30 6.20 5.53 4.63 3.93 5.55 MEAN 2.94 2.98 3.97 5.38 6.63 7.27 8.63 7.84 6.11 5.57 4.67 3.59 5.47 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 12 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 5.83 9.59 9.95 10.33 12.72 11.16 6.54 ***** 7.20 4.21 ***** 1987 4.81 ***** 5.30 6.44 9.74 ***** 10.37 10.55 10.54 ***** ***** ***** ***** 1988 ***** ***** 6.23 9.06 11.15 13.31 17.21 15.96 9.38 8.44 5.65 5.02 ***** 1989 2.56 2.50 5.64 6.91 8.20 8.72 14.31 14.11 12.23 7.19 7.71 4.88 7.91 1990 3.48 4.15 5.28 6.64 8.31 9.49 11.52 9.82 7.01 7.86 6.20 5.44 7.10 1991 4.29 ***** 6.37 7.67 8.91 10.79 11.55 11.16 7.83 8.51 6.72 4.54 ***** 1992 3.24 3.83 3.93 6.67 10.05 10.60 10.72 11.52 7.70 6.90 7.53 4.67 7.28 1993 3.95 3.99 4.69 7.00 9.23 9.56 11.59 10.65 7.26 7.18 6.08 4.67 7.15 1994 4.33 4.43 5.88 8.01 8.72 9.85 11.70 10.24 8.88 8.73 6.79 3.51 7.59 1995 4.59 4.75 5.51 7.22 9.53 11.35 11.43 10.37 8.42 6.70 5.43 4.17 7.46 1996 3.98 4.79 5.49 6.56 9.25 9.12 11.70 9.10 8.55 7.98 5.58 5.83 7.33 1997 3.95 3.31 4.70 6.43 9.01 10.31 10.40 10.65 9.63 9.44 7.59 5.41 7.57 1998 3.93 3.83 6.01 7.89 9.93 10.41 11.98 10.23 7.97 6.47 6.74 5.43 7.57 1999 4.99 4.97 5.56 6.52 7.58 9.02 10.42 9.40 8.12 6.87 5.45 5.12 7.00 2000 3.83 3.29 4.43 7.18 7.93 7.92 9.24 8.18 7.10 7.14 6.02 5.38 6.47 2001 4.37 4.71 6.23 7.20 7.66 7.81 11.29 9.07 7.55 7.08 5.74 5.64 7.03 2002 4.02 4.29 5.28 7.53 8.28 7.98 10.34 9.27 6.74 8.01 5.97 4.41 6.84 2003 4.25 4.26 5.18 7.38 9.11 11.19 11.62 9.90 8.44 7.55 6.35 5.38 7.55 MEAN 4.04 4.08 5.42 7.33 9.03 9.87 11.67 10.63 8.33 7.63 6.40 4.92 7.44 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 13 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 ***** ***** 4.03 5.26 8.01 15.59 25.34 25.05 24.31 ***** 2.06 1.68 ***** 1987 3.74 ***** 3.14 8.60 15.61 ***** 28.69 27.57 19.83 ***** ***** ***** ***** 1988 ***** ***** 3.06 5.19 10.16 14.14 16.20 15.62 18.12 10.07 5.05 2.71 ***** 1989 1.06 1.60 3.96 11.32 14.47 23.01 27.17 22.56 15.34 12.64 3.94 3.06 11.68 1990 1.36 1.65 4.15 6.96 13.03 20.78 26.11 25.11 22.83 10.36 7.93 3.54 11.98 1991 1.04 ***** 3.95 9.00 11.04 19.12 25.36 27.56 20.84 9.78 5.24 1.19 ***** 1992 1.07 1.15 1.99 5.65 5.89 14.86 23.45 19.19 17.92 12.12 3.40 1.95 9.05 1993 1.40 1.69 3.91 6.50 8.82 17.91 23.38 22.51 22.00 9.88 3.16 1.82 10.25 1994 2.68 2.57 3.93 7.30 10.36 15.72 19.64 21.94 13.98 7.48 3.80 1.90 9.27 1995 2.71 2.48 4.43 5.65 10.02 13.31 20.56 24.35 17.01 9.28 5.14 2.64 9.80 1996 1.36 3.02 2.84 5.95 11.73 16.60 22.98 25.42 18.37 8.68 4.84 3.48 10.44 1997 2.41 1.40 1.70 6.51 10.44 16.13 21.57 23.53 14.39 9.20 3.31 2.81 9.45 1998 1.10 1.94 3.33 6.78 9.67 19.49 21.73 26.07 19.17 11.72 7.90 5.33 11.18 1999 1.78 3.70 4.64 9.57 16.55 23.70 25.99 32.22 21.27 14.16 5.56 3.28 13.54 2000 2.11 2.76 5.19 10.35 15.17 21.73 34.29 31.42 22.49 10.03 4.54 2.43 13.54 2001 2.56 3.00 7.48 10.26 14.04 24.79 27.13 31.97 23.36 12.59 5.52 3.08 13.82 2002 2.01 3.58 6.76 6.30 12.83 22.72 26.88 27.43 25.30 14.29 6.24 1.66 13.00 2003 2.95 2.81 3.43 7.83 13.07 18.77 26.06 30.15 20.70 14.35 4.73 2.06 12.24 MEAN 1.96 2.38 3.99 7.50 11.72 18.73 24.59 25.54 19.85 11.04 4.84 2.63 11.23 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 14 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 *** *** 63 68 61 45 38 35 26 *** 81 74 *** 1987 61 *** 65 46 40 *** 28 30 37 *** *** *** *** 1988 *** *** 70 65 56 53 56 55 39 51 57 70 *** 1989 73 65 63 42 41 33 37 43 50 43 69 65 52 1990 73 73 60 56 43 35 34 32 26 49 49 67 50 1991 82 *** 67 51 49 40 35 33 32 53 61 80 *** 1992 74 77 70 59 68 47 36 42 36 42 71 72 58 1993 76 72 61 58 56 39 37 36 29 48 68 74 55 1994 64 64 65 58 51 44 41 35 43 59 67 66 55 1995 65 68 60 60 52 51 39 34 39 47 56 65 53 1996 75 65 69 57 50 39 37 30 36 53 57 65 53 1997 66 71 75 56 52 44 37 35 44 55 72 69 56 1998 80 68 68 59 56 39 38 31 33 40 51 55 52 1999 76 62 59 46 37 30 32 25 31 38 54 64 46 2000 69 59 51 45 38 31 24 23 28 47 61 71 46 2001 67 64 51 46 40 27 33 25 28 41 56 67 45 2002 69 57 50 58 45 29 31 28 24 42 54 74 47 2003 64 63 63 53 44 42 34 28 33 39 61 74 50 MEAN 71 66 63 55 49 39 36 33 34 47 61 69 51 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 15 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 *** 84 78 85 87 74 63 60 52 *** 92 86 *** 1987 79 85 79 64 55 40 35 39 48 64 58 87 61 1988 92 90 85 85 85 85 84 81 65 71 76 85 82 1989 81 77 80 62 66 62 56 65 71 62 88 83 71 1990 83 83 79 78 68 58 53 51 39 72 72 83 68 1991 92 87 84 72 74 64 56 54 59 80 82 91 75 1992 85 88 85 79 86 74 64 65 62 70 89 84 78 1993 85 82 79 77 77 65 59 60 52 70 84 87 73 1994 82 82 85 82 75 65 63 54 63 81 84 84 75 1995 82 85 82 83 73 74 61 54 61 74 79 81 74 1996 86 82 87 79 73 62 56 48 55 75 79 82 72 1997 82 87 91 79 75 69 57 55 63 76 88 85 76 1998 92 83 86 81 82 59 57 48 50 59 70 72 70 1999 89 82 80 68 62 48 49 42 51 56 74 81 65 2000 88 78 70 67 60 49 41 39 47 68 79 87 64 2001 81 79 74 69 61 45 50 43 45 60 73 76 63 2002 84 73 68 74 69 47 50 46 44 64 73 87 65 2003 76 79 78 73 68 63 52 47 51 60 78 85 68 MEAN 85 83 81 75 72 61 56 53 54 68 79 84 71 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION PIRANSHAHR (40724) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 16 LATITUDE 36 40 N LONGITUDE 45 8 E DATA PROCESSING CENTER ELEVATION 1455.0 M AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1986 *** 56 51 53 41 29 24 23 13 *** 69 62 *** 1987 49 58 54 35 30 22 22 24 29 44 25 66 38 1988 81 75 58 49 38 36 41 40 25 37 41 55 48 1989 64 53 50 28 27 19 25 30 37 31 52 49 39 1990 62 63 45 40 29 23 24 20 18 34 31 54 37 1991 73 68 55 36 34 26 22 21 17 35 39 68 41 1992 60 64 55 45 54 31 21 29 21 26 55 59 43 1993 67 62 48 43 39 25 25 22 16 31 50 56 40 1994 46 46 47 36 28 27 24 20 26 37 48 45 36 1995 48 48 38 39 34 32 23 17 21 27 35 43 34 1996 62 45 49 35 31 24 22 16 21