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