STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 **** **** **** 101 129 120 124 124 120 124 120 124 1086 VECTOR WIND DIRECTION (MEAN) *** *** *** *** 195 280 253 285 270 227 179 185 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** 3.1 6.0 3.7 2.9 2.6 2.7 2.0 1.3 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** 44.9 75.0 52.9 34.5 46.4 49.1 64.5 32.5 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** 6.9 8.0 7.0 8.4 5.6 5.5 3.1 4.0 **** FASTEST WIND DIRECTION *** *** *** *** 150 350 30 300 90 180 180 250 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** 23 17 19 23 16 19 16 19 *** DAY ** ** ** ** 3 2 22 18 1 1 2 30 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** 1 10 27 22 25 26 14 9 15 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** 16 15 3 9 6 4 11 9 6 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** 7 6 0 0 0 0 6 12 10 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** 0 0 0 0 0 0 0 1 0 **** DURATION OF SUNSHINE HOURS ****** ****** ****** 152.4 272.8 358.9 346.2 350.9 301.0 223.8 173.4 200.2 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. 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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 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 862.6 862.7 858.5 858.8 860.4 865.5 867.8 865.5 866.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 867.9 868.9 866.1 862.1 863.3 870.5 871.9 870.4 872.1 ****** DAY ** ** ** 15 21 2 31 24 23 15 15 23 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 862.7 862.8 858.5 858.9 860.3 865.2 867.5 865.0 865.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 867.4 867.0 866.2 861.9 863.6 870.0 872.0 870.2 871.7 ****** DAY ** ** ** 15 20 2 4 24 23 15 15 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** 858.2 856.0 854.4 855.2 854.0 860.8 860.6 858.2 858.0 ****** DAY ** ** ** 9 4 25 20 5 5 1 8 27 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1013.1 1013.1 1008.3 1008.7 1010.3 1015.9 1018.5 1015.7 1016.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1018.4 1018.0 1017.1 1012.2 1014.1 1021.4 1023.7 1021.6 1023.3 ****** DAY ** ** ** 15 20 2 4 24 23 15 15 23 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 ****** ****** ****** 861.7 861.8 857.9 858.2 859.4 864.1 866.7 864.5 865.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 866.7 866.3 865.4 861.3 863.2 868.7 871.5 870.2 871.3 ****** DAY ** ** ** 14 18 2 31 24 23 15 15 23 MIN. 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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 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.2 9.3 7.5 15.3 23.4 28.3 30.6 29.9 26.1 17.8 12.8 6.1 17.9 MINIMUN AIR TEMPERATURE (C) 1.4 3.8 3.6 8.5 16.4 19.2 22.5 22.1 18.6 12.5 6.7 1.8 11.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 6 28 19 4 0 0 0 58 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH FREEZING MIN.<= 0 11 3 5 0 0 0 0 0 0 0 0 8 27 TEMPERATURE RECORDS LOWEST(C) -2.2 -0.8 -2.2 1.6 9.8 15.0 17.8 14.3 14.4 7.8 1.4 -4.2 -4.2 DAY 1 11 20 1 26 11 10 27 21 31 28 31 MAXIMUM AIR TEMPERATURE (C) 12.7 13.4 11.5 19.9 28.0 33.2 35.9 34.9 31.1 22.3 17.9 10.1 22.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 30 30 30 19 2 0 0 119 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.2 19.6 16.0 29.5 31.0 37.2 38.8 38.2 36.2 30.0 22.4 15.4 38.8 DAY 18 1 3 30 29 27 18 6 9 3 17 3 DIF. BETWEEN (MAX.-MIN.) (C) 11.3 9.6 7.9 11.4 11.6 14.0 13.4 12.8 12.5 9.8 11.2 8.3 11.2 MEAN DAILY TEMP. (MDT) (C) 7.0 8.6 7.6 14.2 22.2 26.2 29.2 28.5 24.8 17.4 12.3 5.9 17.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.8 50.0 156.5 246.2 232.6 114.6 7.5 0.0 0.0 808.4 HEATING DEG. DAYS(BASE 18 0C) 294.0 262.9 313.7 124.0 1.2 0.0 0.0 0.0 0.0 52.2 167.2 373.9 1589.0 DEWPOINT (MEAN C) -5.8 -1.7 1.1 -0.7 2.7 -1.5 2.2 1.1 -1.7 3.8 -0.9 -1.0 -0.2 MIXING RATIO (G/KG) 3.05 4.10 5.06 4.56 5.62 4.13 5.41 4.99 4.09 6.27 4.44 4.36 4.67 VAPOUR PRESSURE (HPA) 4.23 5.66 6.94 6.27 7.74 5.67 7.41 6.84 5.64 8.62 6.14 6.03 6.43 SATURATION DEF. (HPA) 7.27 6.45 3.78 12.14 21.76 33.97 37.67 36.21 29.09 12.58 9.15 3.69 17.81 RELATIVE HUMIDITY (MEAN %) 41 51 67 38 29 16 18 17 18 46 42 65 37 RELATIVE HUMIDITY (MAX. %) 54 66 83 56 42 24 27 25 29 61 57 79 50 RELATIVE HUMIDITY (MIN. %) 29 37 49 26 19 10 11 11 11 32 27 50 26 RELATIVE HUMIDITY (MEAN% 03UTC) 48 60 78 50 37 24 26 23 28 53 50 72 46 RELATIVE HUMIDITY (MEAN% 09UTC) 32 41 56 32 22 12 13 12 13 34 30 57 30 RELATIVE HUMIDITY (MEAN% 15UTC) 50 55 70 34 28 13 15 15 15 49 45 67 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.1 101.6 283.0 21.4 27.4 0.0 2.8 1.0 0.0 125.6 48.0 201.4 820.3 DAYS WITH PRECIPITATION >=10 0 3 10 0 1 0 0 0 0 5 2 7 28 DAYS WITH PRECIPITATION >= 5 0 5 12 2 2 0 0 0 0 8 4 9 42 DAYS WITH PRECIPITATION >= 1 2 10 20 6 6 0 1 1 0 11 4 10 71 DAYS WITH PRECIPITATION 6 11 23 8 7 0 3 2 1 16 5 11 93 GREATEST DAILY PRECIPITATION 4.0 36.0 50.0 6.0 10.0 0.0 2.0 1.0 0.0 28.4 18.0 56.0 56.0 DAY 7 5 4 4 5 ** 31 1 ** 24 2 23 DAY WITH THUNDER STORM 2 9 7 5 5 0 2 2 0 12 4 7 55 DAYS WITH SNOW OR SLEET 1 0 4 0 0 0 0 0 0 0 0 1 6 DAYS WITH DUST 2 0 0 0 1 3 3 1 4 3 0 0 17 WIND DIRECTION (PREVAILING) 225 135 180 180 225 270 270 270 225 180 180 180 225 PREVAILING WIND SPEED(KNOTS) 5.8 10.1 8.4 8.1 8.7 9.1 9.2 8.8 7.8 8.8 8.4 8.0 7.5 PREVAILING WIND PERCENT 13.2 13.1 17.2 14.4 11.8 20.0 19.4 26.9 15.6 19.4 10.0 19.9 11.7 CALMS PERCENT OF WIND 52.7 53.1 48.9 50.6 51.1 41.1 46.2 39.2 55.6 45.7 68.3 59.1 50.9 NO. OF WIND OBSERVATION 129 145 186 180 186 180 186 186 180 186 180 186 2110 VECTOR WIND DIRECTION (MEAN) 187 173 183 211 249 276 277 268 262 146 192 182 222 VECTOR WIND MAGNITUDE(KNOTS) 2.1 2.5 2.9 1.9 1.1 3.1 2.2 3.2 2.6 1.6 1.3 1.9 1.5 WIND STEADINESES (MEAN %) 65.6 67.6 69.0 55.9 28.9 63.3 47.8 65.3 72.2 36.4 52.0 65.5 39.5 WIND SPEED (MEAN KNOTS) 3.2 3.7 4.2 3.4 3.8 4.9 4.6 4.9 3.6 4.4 2.5 2.9 3.8 FASTEST WIND DIRECTION 130 150 30 230 240 300 270 240 270 190 240 270 270 FASTEST WIND SPEED (KNOTS) 16 19 16 14 17 14 16 14 12 17 17 39 39 DAY 6 25 4 4 21 9 19 1 1 6 19 7 DAYS WITH SKY CLEAR (0-2)/8 17 8 5 16 10 29 28 25 28 13 20 7 206 DAYS WITH P.CLOUDY (3-6)/8 11 13 15 12 11 1 3 6 2 11 5 11 101 DAYS WITH CLOUDY (7-8)/8 2 7 11 2 10 0 0 0 0 7 5 13 57 DAYS WITH VISIBILITY =< 2 KM 1 1 3 0 0 3 0 1 2 0 2 3 16 DURATION OF SUNSHINE HOURS 211.0 200.2 157.4 272.0 216.4 334.5 335.2 325.5 297.4 218.6 220.4 124.1 2912.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 867.3 865.0 860.8 864.3 863.9 860.8 859.0 859.7 863.5 865.7 867.5 866.4 863.7 MAX. QFE PRESSURE IN HPA 873.2 872.9 865.8 871.0 868.3 865.2 862.0 864.0 868.5 870.1 872.0 873.0 873.2 DAY-HOUR 17- 6 1- 6 31-18 22- 9 4-12 29- 6 30- 6 6- 6 25- 6 14- 6 30-18 2- 6 MIN. QFE PRESSURE IN HPA 855.6 858.1 852.3 856.9 859.7 856.5 854.7 856.5 860.2 860.0 861.3 857.1 852.3 DAY-HOUR 6-12 9- 3 13-15 4-12 29-15 13- 3 27-12 25- 3 10-12 23- 3 7- 3 23-18 MEAN QNH PRESSURE IN HPA 1018.3 1015.7 1010.9 1014.9 1014.4 1011.0 1008.8 1009.6 1014.0 1016.4 1018.5 1017.3 1014.2 MAX. QNH PRESSURE IN HPA 1025.0 1024.7 1016.6 1022.5 1019.5 1015.9 1012.3 1014.6 1019.7 1021.5 1023.7 1024.8 1025.0 DAY-HOUR 17- 6 1- 6 31-18 22- 9 4-12 29- 6 30- 6 6- 6 25- 6 14- 6 30-18 2- 6 MIN. QNH PRESSURE IN HPA 1005.0 1007.8 1001.2 1006.5 1009.7 1006.0 1004.0 1006.0 1010.2 1010.0 1011.5 1006.7 1001.2 DAY-HOUR 6-12 9- 3 13-15 4-12 29-15 13- 3 27-12 25- 3 10-12 23- 3 7- 3 23-18 MEAN QFF PRESSURE IN HPA ****** ****** 1010.5 1010.6 1005.4 999.9 996.5 ****** 1004.1 1010.5 1015.9 1018.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1015.8 1019.1 1012.1 1004.6 1001.4 ****** 1010.8 1018.0 1023.7 1026.0 ****** DAY-HOUR **-** **-** 31-18 22- 6 13- 3 3-15 10- 3 **-** 30- 6 31- 6 30-18 2- 6 MIN. QFF PRESSURE IN HPA ****** ****** 1000.8 1001.9 999.2 995.7 990.4 ****** 999.4 1002.2 1007.0 1005.1 ****** DAY-HOUR **-** **-** 13-15 19- 3 29-18 12- 6 26-15 **-** 10- 3 4- 6 7- 3 23-18 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 868.3 864.8 860.5 864.0 863.5 860.6 858.8 859.4 863.1 865.3 867.1 866.3 863.5 MAX. QFE PRESSURE IN HPA 872.2 871.9 864.5 869.7 867.5 864.7 861.6 863.5 868.1 869.1 870.0 872.5 872.5 DAY 17 1 24 22 13 29 30 6 26 15 23 2 MIN. QFE PRESSURE IN HPA 862.2 858.1 853.4 858.2 860.4 856.5 855.3 856.5 860.6 860.0 861.3 858.6 853.4 DAY 24 9 14 5 22 13 27 25 10 23 7 24 MEAN QNH PRESSURE IN HPA 1019.5 1015.5 1010.5 1014.6 1014.0 1010.7 1008.6 1009.3 1013.5 1016.1 1018.1 1017.2 1014.0 MAX. QNH PRESSURE IN HPA 1023.9 1023.6 1015.1 1021.0 1018.5 1015.4 1011.8 1014.0 1019.2 1020.4 1021.4 1024.2 1024.2 DAY 17 1 24 22 13 29 30 6 26 15 23 2 MIN. QNH PRESSURE IN HPA 1012.5 1007.8 1002.5 1007.9 1010.5 1006.0 1004.6 1006.0 1010.7 1010.0 1011.5 1008.4 1002.5 DAY 24 9 14 5 22 13 27 25 10 23 7 24 MEAN QFF PRESSURE IN HPA 1019.5 1014.8 1010.3 1010.6 1005.5 1000.0 996.5 997.9 1003.9 1010.3 1015.7 1017.9 1008.6 MAX. QFF PRESSURE IN HPA 1023.9 1022.2 1014.7 1018.4 1012.1 1004.6 1001.4 1001.2 1010.0 1016.0 1020.7 1025.4 1025.4 DAY 28 1 22 22 13 1 10 5 30 14 30 2 MIN. QFF PRESSURE IN HPA 1011.3 1007.6 1001.5 1001.9 1001.0 996.9 990.9 995.5 999.4 1002.7 1007.0 1005.8 990.9 DAY 24 9 4 19 30 13 27 21 10 4 7 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 867.8 865.8 861.3 864.9 864.3 861.1 859.2 859.9 864.0 866.3 868.1 867.2 864.2 MAX. QFE PRESSURE IN HPA 873.2 872.9 865.6 870.7 867.7 865.2 862.0 864.0 868.5 870.1 871.0 873.0 873.2 DAY 17 1 7 22 13 29 30 6 25 14 30 2 MIN. QFE PRESSURE IN HPA 858.5 859.9 855.1 858.6 860.7 856.9 856.0 857.0 861.1 862.0 862.8 859.0 855.1 DAY 6 9 14 4 30 12 27 25 10 4 7 23 MEAN QNH PRESSURE IN HPA 1018.9 1016.6 1011.4 1015.5 1014.8 1011.3 1009.1 1009.9 1014.6 1017.2 1019.2 1018.2 1014.7 MAX. QNH PRESSURE IN HPA 1025.0 1024.7 1016.4 1022.2 1018.8 1015.9 1012.3 1014.6 1019.7 1021.5 1022.5 1024.8 1025.0 DAY 17 1 7 22 13 29 30 6 25 14 30 2 MIN. QNH PRESSURE IN HPA 1008.3 1009.9 1004.4 1008.4 1010.8 1006.5 1005.4 1006.6 1011.3 1012.3 1013.2 1008.9 1004.4 DAY 6 9 14 4 30 12 27 25 10 4 7 23 MEAN QFF PRESSURE IN HPA ****** ****** 1010.8 1011.1 1005.7 999.9 996.6 997.7 1004.3 1011.0 1016.3 1018.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1015.3 1019.1 1011.2 1003.8 1000.5 1000.7 1010.8 1018.0 1022.8 1026.0 ****** DAY ** ** 15 22 13 3 9 6 30 31 30 2 MIN. QFF PRESSURE IN HPA ****** ****** 1002.4 1003.3 1000.5 995.7 992.0 995.0 999.8 1002.2 1008.7 1006.3 ****** DAY ** ** 4 19 30 12 27 25 10 4 7 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.6 865.6 861.1 864.8 864.4 861.1 859.2 859.9 863.8 866.1 867.6 866.7 864.0 MAX. QFE PRESSURE IN HPA 873.2 872.8 865.6 871.0 867.8 865.1 861.9 863.7 868.5 870.0 870.5 873.0 873.2 DAY 17 1 7 22 12 3 30 6 26 1 30 2 MIN. QFE PRESSURE IN HPA 856.3 859.8 854.2 858.0 860.7 857.3 855.8 857.1 860.7 861.9 862.5 859.5 854.2 DAY 6 9 13 4 30 12 27 25 10 4 7 23 MEAN QNH PRESSURE IN HPA 1018.7 1016.4 1011.3 1015.5 1015.0 1011.3 1009.1 1009.9 1014.4 1017.0 1018.7 1017.6 1014.6 MAX. QNH PRESSURE IN HPA 1025.0 1024.6 1016.4 1022.5 1018.9 1015.8 1012.2 1014.2 1019.7 1021.4 1022.0 1024.8 1025.0 DAY 17 1 7 22 12 3 30 6 26 1 30 2 MIN. QNH PRESSURE IN HPA 1005.8 1009.8 1003.4 1007.7 1010.8 1006.9 1005.2 1006.7 1010.8 1012.2 1012.8 1009.4 1003.4 DAY 6 9 13 4 30 12 27 25 10 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 866.3 864.4 860.3 864.1 863.9 860.7 858.7 859.3 863.1 865.3 867.0 865.8 863.2 MAX. QFE PRESSURE IN HPA 871.9 870.6 864.7 869.3 868.3 864.5 860.8 863.5 868.0 868.8 870.2 872.0 872.0 DAY 17 1 7 22 4 3 9 6 26 1 30 1 MIN. QFE PRESSURE IN HPA 855.6 858.7 852.5 856.9 860.0 857.2 854.7 856.9 860.2 861.0 862.6 858.8 852.5 DAY 6 9 13 4 21 12 27 25 10 4 7 23 MEAN QNH PRESSURE IN HPA 1017.2 1015.0 1010.3 1014.6 1014.5 1010.8 1008.5 1009.2 1013.5 1016.0 1018.0 1016.6 1013.7 MAX. QNH PRESSURE IN HPA 1023.6 1022.1 1015.4 1020.6 1019.5 1015.1 1010.9 1014.0 1019.1 1020.0 1021.6 1023.7 1023.7 DAY 17 1 7 22 4 3 9 6 26 1 30 1 MIN. QNH PRESSURE IN HPA 1005.0 1008.5 1001.5 1006.5 1010.0 1006.8 1004.0 1006.5 1010.2 1011.1 1013.0 1008.6 1001.5 DAY 6 9 13 4 21 12 27 25 10 4 7 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 866.9 864.7 860.5 863.8 863.5 860.4 858.6 859.4 863.1 865.3 867.3 866.2 863.3 MAX. QFE PRESSURE IN HPA 872.5 870.9 864.8 868.6 867.0 863.9 860.9 863.6 867.6 868.8 871.0 871.8 872.5 DAY 17 1 6 21 12 3 31 6 26 1 30 1 MIN. QFE PRESSURE IN HPA 856.4 859.2 852.3 857.5 859.7 857.1 854.9 857.2 860.6 861.5 863.5 858.3 852.3 DAY 6 9 13 4 29 12 26 25 1 4 25 23 MEAN QNH PRESSURE IN HPA 1017.8 1015.3 1010.6 1014.3 1013.9 1010.5 1008.4 1009.3 1013.6 1016.0 1018.3 1017.0 1013.8 MAX. QNH PRESSURE IN HPA 1024.2 1022.4 1015.5 1019.8 1018.0 1014.4 1011.0 1014.1 1018.7 1020.0 1022.5 1023.4 1024.2 DAY 17 1 6 21 12 3 31 6 26 1 30 1 MIN. QNH PRESSURE IN HPA 1005.9 1009.1 1001.2 1007.2 1009.7 1006.7 1004.2 1006.8 1010.7 1011.7 1014.0 1008.1 1001.2 DAY 6 9 13 4 29 12 26 25 1 4 25 23 MEAN QFF PRESSURE IN HPA 1019.3 1014.6 1010.2 1010.1 1005.4 999.8 996.3 997.7 1004.0 1010.3 1015.9 1017.8 1008.4 MAX. QFF PRESSURE IN HPA 1024.2 1022.1 1014.8 1018.6 1010.5 1004.6 1000.6 1001.0 1010.4 1016.4 1022.3 1024.4 1024.4 DAY 28 11 31 21 4 3 9 31 30 31 30 2 MIN. QFF PRESSURE IN HPA 1009.7 1008.3 1000.8 1003.4 999.8 997.0 990.4 994.8 999.4 1003.4 1011.1 1005.6 990.4 DAY 23 17 13 18 29 18 26 13 11 4 7 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 861.2 864.6 863.8 861.1 859.3 860.1 863.9 865.7 867.7 866.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** 865.8 869.5 867.5 864.8 861.8 863.8 868.2 869.8 872.0 872.5 ****** DAY ** ** 31 21 16 28 9 6 30 1 30 1 MIN. QFE PRESSURE IN HPA ****** ****** 853.0 858.5 859.7 857.4 855.2 857.8 861.1 861.6 863.5 857.1 ****** DAY ** ** 13 4 29 12 26 24 10 11 25 23 MEAN QNH PRESSURE IN HPA ****** ****** 1011.4 1015.2 1014.3 1011.3 1009.2 1010.1 1014.5 1016.5 1018.7 1017.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1016.6 1020.8 1018.5 1015.5 1012.0 1014.3 1019.3 1021.2 1023.7 1024.2 ****** DAY ** ** 31 21 16 28 9 6 30 1 30 1 MIN. QNH PRESSURE IN HPA ****** ****** 1002.0 1008.3 1009.7 1007.0 1004.5 1007.5 1011.3 1011.8 1014.0 1006.7 ****** DAY ** ** 13 4 29 12 26 24 10 11 25 23 MEAN QFF PRESSURE IN HPA ****** ****** 1010.7 1010.6 1005.2 999.8 996.7 997.8 1004.3 1010.4 1015.8 1017.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1015.8 1018.7 1011.6 1003.5 1001.0 1001.3 1010.7 1016.8 1023.7 1024.2 ****** DAY ** ** 31 21 12 1 9 31 30 31 30 1 MIN. QFF PRESSURE IN HPA ****** ****** 1002.0 1003.2 999.2 996.4 990.9 995.1 999.6 1002.3 1009.0 1005.1 ****** DAY ** ** 13 18 29 12 26 13 11 3 6 23 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 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.3 5.2 9.4 15.5 22.5 26.8 31.1 29.7 26.3 20.5 11.9 6.8 17.5 MINIMUN AIR TEMPERATURE (C) 0.8 0.8 5.3 9.2 14.4 18.6 22.0 20.9 18.0 14.2 6.5 2.3 11.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 26 14 2 0 0 0 46 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 0 4 5 DAYS WITH FREEZING MIN.<= 0 15 13 1 0 0 0 0 0 0 0 2 7 38 TEMPERATURE RECORDS LOWEST(C) -5.4 -2.2 -3.0 3.4 6.5 16.0 19.8 15.0 14.4 6.6 -2.0 -12.0 -12.0 DAY 20 25 6 1 4 2 1 31 13 31 14 29 MAXIMUM AIR TEMPERATURE (C) 8.4 9.4 13.2 19.9 27.2 32.0 36.6 35.5 31.7 25.1 16.5 11.1 22.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 11 24 31 30 27 0 0 0 123 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 2 2 TEMPERATURE RECORDS HIGHEST(C) 13.8 14.4 19.2 25.4 32.0 39.0 39.4 39.0 36.0 29.6 22.3 20.6 39.4 DAY 11 27 30 19 23 13 31 1 15 1 7 5 DIF. BETWEEN (MAX.-MIN.) (C) 7.6 8.6 7.9 10.7 12.8 13.4 14.6 14.6 13.7 10.9 10.0 8.8 11.1 MEAN DAILY TEMP. (MDT) (C) 4.6 5.1 9.3 14.5 20.8 25.3 29.3 28.2 24.8 19.6 11.5 6.7 16.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 40.9 128.7 256.5 223.8 115.0 14.4 0.0 0.0 779.4 HEATING DEG. DAYS(BASE 18 0C) 415.8 374.1 262.4 104.4 14.5 0.0 0.0 0.0 0.0 16.3 194.9 350.5 1732.8 DEWPOINT (MEAN C) -1.4 -0.2 0.9 2.9 2.1 -1.5 4.0 5.6 1.1 2.4 -2.2 -2.1 1.0 MIXING RATIO (G/KG) 4.13 4.51 4.85 5.96 5.32 4.13 6.17 6.88 4.95 5.52 4.21 4.03 5.06 VAPOUR PRESSURE (HPA) 5.71 6.21 6.66 8.18 7.31 5.67 8.41 9.39 6.81 7.60 5.82 5.55 6.94 SATURATION DEF. (HPA) 2.79 2.82 5.42 9.97 20.95 30.84 37.94 33.61 28.31 17.22 8.79 5.02 16.97 RELATIVE HUMIDITY (MEAN %) 69 71 59 46 28 17 19 24 20 33 41 59 41 RELATIVE HUMIDITY (MAX. %) 84 86 76 62 41 25 29 37 28 46 58 72 54 RELATIVE HUMIDITY (MIN. %) 52 52 44 34 19 11 13 15 14 23 28 44 29 RELATIVE HUMIDITY (MEAN% 03UTC) 74 81 73 53 39 23 28 34 27 42 49 67 49 RELATIVE HUMIDITY (MEAN% 09UTC) 58 64 50 37 22 13 15 18 16 27 30 50 33 RELATIVE HUMIDITY (MEAN% 15UTC) 74 69 56 46 25 16 17 19 19 34 43 62 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 82.3 128.4 101.4 53.3 2.4 0.0 0.0 0.0 0.0 11.6 14.0 154.2 547.6 DAYS WITH PRECIPITATION >=10 3 6 3 2 0 0 0 0 0 0 0 4 18 DAYS WITH PRECIPITATION >= 5 6 11 6 3 0 0 0 0 0 1 1 7 35 DAYS WITH PRECIPITATION >= 1 13 15 8 8 1 0 0 0 0 3 3 8 59 DAYS WITH PRECIPITATION 15 15 10 12 2 0 0 0 0 6 11 10 81 GREATEST DAILY PRECIPITATION 18.0 19.0 48.0 19.0 2.0 0.0 0.0 0.0 0.0 7.2 5.0 48.0 48.0 DAY 18 9 3 25 1 ** ** ** ** 15 9 17 DAY WITH THUNDER STORM 3 6 2 7 1 1 0 0 1 5 4 1 31 DAYS WITH SNOW OR SLEET 5 5 0 0 0 0 0 0 0 0 0 3 13 DAYS WITH DUST 0 0 2 2 2 3 2 0 3 2 3 0 19 WIND DIRECTION (PREVAILING) 180 225 270 180 270 225 270 270 270 180 180 90 270 PREVAILING WIND SPEED(KNOTS) 5.7 8.9 10.4 9.1 8.8 7.0 7.3 8.5 7.9 9.2 8.2 5.0 8.3 PREVAILING WIND PERCENT 10.8 11.5 15.6 12.2 14.1 15.0 23.7 16.7 19.4 13.7 25.6 19.4 12.2 CALMS PERCENT OF WIND 69.4 69.0 60.8 47.8 49.7 49.4 36.0 52.2 35.6 34.1 26.7 44.6 47.9 NO. OF WIND OBSERVATION 186 174 186 180 185 180 186 186 180 182 180 186 2191 VECTOR WIND DIRECTION (MEAN) 182 219 238 197 261 260 267 236 296 212 175 139 232 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.8 2.7 1.5 2.0 2.0 2.3 2.1 2.8 0.7 2.6 1.9 1.4 WIND STEADINESES (MEAN %) 52.9 69.2 69.2 34.1 47.6 51.3 52.3 55.3 57.1 13.0 54.2 57.6 35.0 WIND SPEED (MEAN KNOTS) 1.7 2.6 3.9 4.4 4.2 3.9 4.4 3.8 4.9 5.4 4.8 3.3 4.0 FASTEST WIND DIRECTION 170 150 180 290 190 360 270 260 300 320 150 150 150 FASTEST WIND SPEED (KNOTS) 17 19 17 17 19 19 16 19 27 21 19 39 39 DAY 7 1 24 11 21 17 6 16 28 7 19 25 DAYS WITH SKY CLEAR (0-2)/8 9 9 15 7 25 27 31 29 29 17 10 8 216 DAYS WITH P.CLOUDY (3-6)/8 13 9 9 14 5 3 0 2 1 12 13 10 91 DAYS WITH CLOUDY (7-8)/8 9 11 7 9 1 0 0 0 0 2 7 13 59 DAYS WITH VISIBILITY =< 2 KM 0 1 1 0 0 0 0 0 0 0 0 3 5 DURATION OF SUNSHINE HOURS 161.6 135.3 215.7 220.8 342.3 370.5 384.6 348.1 310.5 253.8 167.5 143.3 3054.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 864.7 863.0 862.1 863.0 863.3 860.2 856.5 858.1 862.5 865.9 866.5 864.4 862.5 MAX. QFE PRESSURE IN HPA 870.7 869.7 868.0 869.3 866.9 864.5 861.5 861.7 866.9 870.7 871.9 872.2 872.2 DAY-HOUR 3- 9 20- 6 15- 9 8- 6 8- 6 12- 9 30- 6 31-18 15- 9 28- 6 4-18 3- 6 MIN. QFE PRESSURE IN HPA 859.7 852.9 854.4 854.1 859.7 854.0 852.8 853.7 858.6 861.3 859.8 851.0 851.0 DAY-HOUR 18- 3 2- 3 8-12 25-15 1- 3 30-15 18-12 2-15 2-15 30-12 19-12 27- 3 MEAN QNH PRESSURE IN HPA 1015.4 1013.5 1012.4 1013.5 1013.8 1010.3 1006.0 1007.9 1012.8 1016.7 1017.4 1015.1 1012.9 MAX. QNH PRESSURE IN HPA 1022.2 1021.0 1019.1 1020.6 1017.9 1015.1 1011.7 1011.9 1017.9 1022.2 1023.6 1023.9 1023.9 DAY-HOUR 3- 9 20- 6 15- 9 8- 6 8- 6 12- 9 30- 6 31-18 15- 9 28- 6 4-18 3- 6 MIN. QNH PRESSURE IN HPA 1009.7 1001.9 1003.6 1003.3 1009.7 1003.2 1001.8 1002.8 1008.4 1011.5 1009.8 999.7 999.7 DAY-HOUR 18- 3 2- 3 8-12 25-15 1- 3 30-15 18-12 2-15 2-15 30-12 19-12 27- 3 MEAN QFF PRESSURE IN HPA 1017.1 ****** 1010.9 1008.7 1005.6 999.9 993.4 995.9 1002.9 ****** 1015.2 1015.5 ****** MAX. QFF PRESSURE IN HPA 1024.8 ****** 1017.4 1017.4 1012.3 1004.3 999.0 1003.3 1007.8 ****** 1022.9 1030.4 ****** DAY-HOUR 20- 6 **-** 6- 6 8- 6 4- 3 18-18 30- 6 31-18 14- 6 **-** 15- 6 29- 6 MIN. QFF PRESSURE IN HPA 1010.6 ****** 1002.0 997.2 1000.2 991.4 989.2 990.2 997.4 ****** 1006.0 1000.0 ****** DAY-HOUR 26- 3 **-** 26-15 25-15 18- 3 30- 6 16- 6 2-18 2-15 **-** 19-15 26- 3 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 864.4 862.7 861.6 862.7 862.9 860.0 856.2 858.0 862.2 865.7 866.3 864.1 862.2 MAX. QFE PRESSURE IN HPA 869.5 868.5 867.0 867.9 865.7 863.0 860.6 860.5 866.4 869.6 871.0 870.8 871.0 DAY 3 20 16 8 8 12 31 21 15 28 6 3 MIN. QFE PRESSURE IN HPA 859.7 852.9 857.4 856.4 859.7 854.1 853.0 855.9 858.9 862.1 862.1 851.0 851.0 DAY 18 2 3 26 1 30 16 2 3 2 28 27 MEAN QNH PRESSURE IN HPA 1015.0 1013.1 1011.9 1013.1 1013.3 1010.0 1005.6 1007.7 1012.5 1016.4 1017.1 1014.7 1012.5 MAX. QNH PRESSURE IN HPA 1020.8 1019.7 1018.0 1019.0 1016.5 1013.4 1010.7 1010.6 1017.3 1020.9 1022.5 1022.3 1022.5 DAY 3 20 16 8 8 12 31 21 15 28 6 3 MIN. QNH PRESSURE IN HPA 1009.7 1001.9 1007.0 1005.9 1009.7 1003.3 1002.0 1005.3 1008.7 1012.4 1012.4 999.7 999.7 DAY 18 2 3 26 1 30 16 2 3 2 28 27 MEAN QFF PRESSURE IN HPA 1016.7 1014.2 1010.4 1008.8 1005.5 999.9 993.4 996.0 1002.9 1009.6 1015.0 1015.1 1007.3 MAX. QFF PRESSURE IN HPA 1023.6 1021.5 1016.8 1015.6 1012.3 1003.8 998.6 1002.5 1007.4 1015.6 1022.5 1029.3 1029.3 DAY 20 5 6 8 4 1 12 31 25 22 15 29 MIN. QFF PRESSURE IN HPA 1010.6 1000.4 1004.7 999.6 1000.2 991.8 989.6 992.6 998.3 1002.9 1007.9 1000.0 989.6 DAY 26 2 27 25 18 30 16 2 17 1 19 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 865.4 863.7 862.4 863.6 863.6 860.5 856.8 858.4 863.0 866.6 867.2 865.1 863.0 MAX. QFE PRESSURE IN HPA 870.3 869.7 867.3 869.3 866.9 864.0 861.5 860.9 866.7 870.7 871.9 872.2 872.2 DAY 4 20 17 8 8 12 30 31 14 28 6 3 MIN. QFE PRESSURE IN HPA 860.3 854.8 857.4 857.0 860.8 854.4 853.3 855.3 859.4 862.4 862.6 852.2 852.2 DAY 18 2 4 25 1 30 18 3 3 30 28 26 MEAN QNH PRESSURE IN HPA 1016.1 1014.3 1012.7 1014.1 1014.1 1010.6 1006.3 1008.2 1013.4 1017.6 1018.2 1015.8 1013.4 MAX. QNH PRESSURE IN HPA 1021.7 1021.0 1018.3 1020.6 1017.9 1014.6 1011.7 1011.0 1017.6 1022.2 1023.6 1023.9 1023.9 DAY 4 20 17 8 8 12 30 31 14 28 6 3 MIN. QNH PRESSURE IN HPA 1010.3 1004.1 1007.0 1006.6 1010.9 1003.6 1002.4 1004.6 1009.3 1012.7 1013.0 1001.1 1001.1 DAY 18 2 4 25 1 30 18 3 3 30 28 26 MEAN QFF PRESSURE IN HPA 1017.9 1015.1 1011.1 1009.3 1005.8 1000.1 993.3 995.7 1003.1 1009.7 1015.5 1016.1 1007.7 MAX. QFF PRESSURE IN HPA 1024.8 1022.7 1017.4 1017.4 1011.7 1003.8 999.0 1002.5 1007.8 1016.8 1022.9 1030.4 1030.4 DAY 20 20 6 8 4 3 30 31 14 22 15 29 MIN. QFF PRESSURE IN HPA 1011.7 1002.5 1005.2 999.3 1000.5 991.4 989.2 990.7 998.5 1003.2 1008.2 1000.8 989.2 DAY 26 2 4 25 18 30 16 3 17 1 19 26 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 865.1 863.5 862.4 863.6 863.7 860.6 856.8 858.2 862.9 866.2 866.7 864.8 862.9 MAX. QFE PRESSURE IN HPA 870.7 869.0 868.0 869.3 866.6 864.5 861.2 861.4 866.9 869.9 871.0 871.5 871.5 DAY 3 20 15 8 8 12 31 31 15 28 5 3 MIN. QFE PRESSURE IN HPA 860.2 855.5 856.5 856.9 861.0 855.0 853.3 855.2 859.5 862.4 861.1 852.2 852.2 DAY 26 2 4 25 18 30 18 25 3 1 19 26 MEAN QNH PRESSURE IN HPA 1015.8 1014.0 1012.8 1014.0 1014.2 1010.7 1006.3 1008.0 1013.3 1017.1 1017.6 1015.4 1013.3 MAX. QNH PRESSURE IN HPA 1022.2 1020.3 1019.1 1020.6 1017.5 1015.1 1011.4 1011.6 1017.9 1021.3 1022.5 1023.1 1023.1 DAY 3 20 15 8 8 12 31 31 15 28 5 3 MIN. QNH PRESSURE IN HPA 1010.2 1004.9 1006.0 1006.5 1011.1 1004.3 1002.4 1004.5 1009.4 1012.7 1011.3 1001.1 1001.1 DAY 26 2 4 25 18 30 18 25 3 1 19 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 864.2 862.5 861.6 862.9 863.1 860.1 856.3 857.9 862.0 865.4 865.9 863.8 862.1 MAX. QFE PRESSURE IN HPA 869.8 868.0 866.4 868.0 866.4 864.0 860.8 861.1 866.0 869.0 870.5 870.1 870.5 DAY 3 26 16 8 8 12 30 31 14 28 6 2 MIN. QFE PRESSURE IN HPA 860.0 855.6 854.4 855.2 860.5 855.0 852.8 854.1 858.8 861.3 859.8 851.5 851.5 DAY 18 16 8 25 18 30 18 25 3 30 19 26 MEAN QNH PRESSURE IN HPA 1014.8 1012.8 1011.9 1013.3 1013.6 1010.1 1005.8 1007.6 1012.3 1016.1 1016.7 1014.3 1012.4 MAX. QNH PRESSURE IN HPA 1021.2 1019.1 1017.3 1019.1 1017.3 1014.6 1010.9 1011.3 1016.8 1020.3 1022.0 1021.5 1022.0 DAY 3 26 16 8 8 12 30 31 14 28 6 2 MIN. QNH PRESSURE IN HPA 1010.0 1005.0 1003.6 1004.5 1010.6 1004.3 1001.8 1003.3 1008.6 1011.5 1009.8 1000.3 1000.3 DAY 18 16 8 25 18 30 18 25 3 30 19 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 864.4 862.7 861.9 862.4 862.8 859.8 856.1 857.9 862.1 865.7 866.3 864.2 862.2 MAX. QFE PRESSURE IN HPA 869.8 868.4 866.7 867.2 865.8 863.0 860.4 860.8 866.0 869.2 871.0 870.2 871.0 DAY 3 26 16 11 3 12 30 31 14 28 5 3 MIN. QFE PRESSURE IN HPA 859.8 854.9 855.1 854.1 860.5 854.0 852.8 853.7 858.6 861.6 860.0 851.9 851.9 DAY 18 16 8 25 18 30 18 2 2 30 19 25 MEAN QNH PRESSURE IN HPA 1015.0 1013.1 1012.2 1012.7 1013.2 1009.7 1005.5 1007.6 1012.4 1016.5 1017.1 1014.8 1012.5 MAX. QNH PRESSURE IN HPA 1021.2 1019.6 1017.6 1018.2 1016.6 1013.4 1010.5 1010.9 1016.8 1020.5 1022.5 1021.6 1022.5 DAY 3 26 16 11 3 12 30 31 14 28 5 3 MIN. QNH PRESSURE IN HPA 1009.8 1004.2 1004.4 1003.3 1010.6 1003.2 1001.8 1002.8 1008.4 1011.8 1010.0 1000.8 1000.8 DAY 18 16 8 25 18 30 18 2 2 30 19 25 MEAN QFF PRESSURE IN HPA 1016.7 1014.1 1010.7 1008.2 1005.3 999.5 993.2 996.0 1002.6 1009.7 1015.1 1015.2 1007.2 MAX. QFF PRESSURE IN HPA 1023.7 1021.4 1017.0 1014.7 1012.0 1003.7 997.9 1002.7 1006.5 1015.1 1022.5 1028.5 1028.5 DAY 2 26 6 8 4 3 30 31 14 23 14 29 MIN. QFF PRESSURE IN HPA 1011.7 1003.9 1002.0 997.2 1000.3 991.8 989.9 990.2 997.4 1002.7 1006.0 1000.6 989.9 DAY 25 16 26 25 17 30 16 2 2 1 19 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 865.0 863.1 862.5 863.2 863.7 860.5 857.1 858.5 862.9 865.9 866.8 864.8 862.8 MAX. QFE PRESSURE IN HPA 870.1 868.4 867.2 867.7 866.6 864.0 861.4 861.7 866.3 869.4 871.9 871.0 871.9 DAY 3 26 15 8 3 12 30 31 14 27 4 2 MIN. QFE PRESSURE IN HPA 860.1 855.2 855.1 857.8 861.5 854.7 853.8 854.9 859.5 862.3 861.5 852.7 852.7 DAY 15 1 8 24 31 30 18 2 16 30 19 25 MEAN QNH PRESSURE IN HPA 1015.7 1013.6 1012.8 1013.6 1014.3 1010.6 1006.6 1008.3 1013.3 1016.8 1017.7 1015.5 1013.2 MAX. QNH PRESSURE IN HPA 1021.5 1019.6 1018.2 1018.8 1017.5 1014.6 1011.6 1011.9 1017.2 1020.7 1023.6 1022.5 1023.6 DAY 3 26 15 8 3 12 30 31 14 27 4 2 MIN. QNH PRESSURE IN HPA 1010.1 1004.5 1004.4 1007.5 1011.7 1004.0 1002.9 1004.2 1009.4 1012.6 1011.7 1001.7 1001.7 DAY 15 1 8 24 31 30 18 2 16 30 19 25 MEAN QFF PRESSURE IN HPA 1017.3 1014.4 1011.3 1008.6 1005.8 1000.0 993.6 995.9 1002.9 1009.4 1015.1 1015.7 1007.5 MAX. QFF PRESSURE IN HPA 1024.6 1021.1 1016.9 1015.4 1012.2 1004.3 998.3 1003.3 1007.0 1014.9 1022.3 1028.4 1028.4 DAY 2 26 15 8 3 18 30 31 13 22 14 29 MIN. QFF PRESSURE IN HPA 1011.0 1002.7 1002.4 1000.9 1002.0 991.9 989.4 990.2 998.4 1003.7 1007.3 1001.2 989.4 DAY 6 1 26 24 23 30 18 2 16 1 19 25 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 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 2.7 8.6 16.2 21.7 26.5 30.9 29.1 24.2 19.9 10.9 5.9 16.5 MINIMUN AIR TEMPERATURE (C) -3.0 -1.1 4.4 10.8 16.1 19.4 23.9 22.2 17.8 14.7 6.8 2.1 11.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 7 30 22 5 0 0 0 65 DAYS WITH MINIMUM TEMP. <=-4 11 4 1 0 0 0 0 0 0 0 0 0 16 DAYS WITH FREEZING MIN.<= 0 28 16 3 0 0 0 0 0 0 0 0 6 53 TEMPERATURE RECORDS LOWEST(C) -9.0 -9.2 -4.4 1.0 10.4 15.4 20.8 19.0 13.0 8.2 1.4 -3.0 -9.2 DAY 17 15 30 1 9 2 13 12 29 22 21 7 MAXIMUM AIR TEMPERATURE (C) 5.8 7.6 13.8 22.1 27.4 33.0 37.7 35.8 30.9 25.7 15.8 10.7 22.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 26 31 31 15 2 0 0 114 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 9.6 17.0 22.2 27.4 33.0 37.8 40.6 38.2 36.4 31.8 20.8 15.2 40.6 DAY 19 28 7 16 24 27 20 26 2 6 4 24 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 8.7 9.4 11.3 11.3 13.6 13.8 13.6 13.1 11.0 9.0 8.6 11.0 MEAN DAILY TEMP. (MDT) (C) 1.4 3.3 9.1 16.4 21.8 26.2 30.8 29.0 24.3 20.2 11.3 6.4 16.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 49.2 156.7 303.6 247.1 98.7 28.1 0.0 0.0 883.4 HEATING DEG. DAYS(BASE 18 0C) 515.8 412.7 275.5 60.2 5.4 0.0 0.0 0.0 0.0 18.5 201.4 359.1 1848.6 DEWPOINT (MEAN C) -2.8 -4.9 1.8 3.0 -0.1 -2.3 -0.6 0.1 -1.4 1.2 3.6 -0.5 -0.2 MIXING RATIO (G/KG) 3.69 3.31 5.19 5.71 4.66 3.85 4.36 4.71 4.12 5.02 5.95 4.44 4.58 VAPOUR PRESSURE (HPA) 5.08 4.56 7.11 7.86 6.41 5.29 5.98 6.46 5.68 6.94 8.22 6.13 6.31 SATURATION DEF. (HPA) 1.87 3.18 4.52 11.29 20.57 30.73 40.04 35.22 25.78 17.16 5.12 3.37 16.57 RELATIVE HUMIDITY (MEAN %) 75 63 66 44 27 16 14 17 20 32 64 67 42 RELATIVE HUMIDITY (MAX. %) 90 80 83 62 41 25 22 27 29 43 81 83 56 RELATIVE HUMIDITY (MIN. %) 59 45 44 27 17 10 8 9 12 21 45 45 29 RELATIVE HUMIDITY (MEAN% 03UTC) 84 66 71 52 35 23 18 23 24 36 71 73 48 RELATIVE HUMIDITY (MEAN% 09UTC) 63 54 51 29 20 11 10 11 13 24 51 49 32 RELATIVE HUMIDITY (MEAN% 15UTC) 80 62 66 42 21 12 11 12 17 33 66 71 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 61.3 83.3 163.6 40.3 17.7 0.0 0.0 0.0 0.0 4.5 125.9 101.3 597.9 DAYS WITH PRECIPITATION >=10 3 4 5 1 1 0 0 0 0 0 3 3 20 DAYS WITH PRECIPITATION >= 5 7 6 13 3 1 0 0 0 0 0 4 4 38 DAYS WITH PRECIPITATION >= 1 8 9 16 7 1 0 0 0 0 2 8 7 58 DAYS WITH PRECIPITATION 9 12 20 9 3 0 0 0 0 3 10 8 74 GREATEST DAILY PRECIPITATION 13.0 27.0 26.0 14.0 17.7 0.0 0.0 0.0 0.0 3.1 55.0 53.8 55.0 DAY 17 13 14 11 7 ** ** ** ** 30 14 1 DAY WITH THUNDER STORM 3 2 7 7 2 0 0 0 0 2 5 3 31 DAYS WITH SNOW OR SLEET 10 6 3 0 0 0 0 0 0 0 0 1 20 DAYS WITH DUST 0 0 0 5 2 5 1 4 3 2 0 0 22 WIND DIRECTION (PREVAILING) 90 90 180 45 270 270 270 270 270 180 90 180 270 PREVAILING WIND SPEED(KNOTS) 5.4 4.6 4.5 5.3 7.3 6.1 4.9 5.3 3.8 5.2 3.4 3.7 5.1 PREVAILING WIND PERCENT 12.3 17.0 19.4 15.5 20.2 23.3 22.2 23.8 20.8 14.1 19.6 10.5 13.6 CALMS PERCENT OF WIND 57.2 37.9 33.1 34.7 21.9 27.5 31.9 39.1 35.4 34.3 42.5 54.8 37.1 NO. OF WIND OBSERVATION 187 224 248 239 247 240 248 248 240 248 240 248 2857 VECTOR WIND DIRECTION (MEAN) 129 88 147 147 327 316 290 302 290 140 132 150 319 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.6 1.5 0.3 1.3 2.5 0.9 1.8 0.6 0.8 1.1 0.5 0.1 WIND STEADINESES (MEAN %) 57.9 44.4 41.7 9.1 27.1 58.1 32.1 56.2 26.1 27.6 50.0 29.4 3.2 WIND SPEED (MEAN KNOTS) 1.9 3.6 3.6 3.3 4.8 4.3 2.8 3.2 2.3 2.9 2.2 1.7 3.1 FASTEST WIND DIRECTION 100 50 90 230 60 330 30 360 270 140 140 120 60 FASTEST WIND SPEED (KNOTS) 29 23 19 19 35 29 17 19 16 16 29 16 35 DAY 22 4 8 28 1 6 30 28 11 26 30 1 DAYS WITH SKY CLEAR (0-2)/8 16 15 7 13 21 30 30 31 30 21 15 16 245 DAYS WITH P.CLOUDY (3-6)/8 9 5 11 12 7 0 1 0 0 6 8 10 69 DAYS WITH CLOUDY (7-8)/8 6 8 13 5 3 0 0 0 0 4 7 5 51 DAYS WITH VISIBILITY =< 2 KM 5 3 3 1 0 0 0 0 0 0 1 3 16 DURATION OF SUNSHINE HOURS 194.4 183.0 172.6 243.8 324.6 379.2 379.7 362.0 324.2 262.3 196.4 205.0 3227.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 861.9 862.8 860.6 864.1 863.5 860.6 858.7 859.7 862.9 866.8 867.8 865.9 862.9 MAX. QFE PRESSURE IN HPA 866.6 867.8 868.9 869.7 866.6 864.6 864.0 863.1 868.5 871.1 871.6 870.7 871.6 DAY-HOUR 18- 9 8- 6 31-21 1- 6 8-18 25- 9 8-21 26-18 24- 6 28- 6 26- 6 18-18 MIN. QFE PRESSURE IN HPA 853.9 854.6 848.0 858.9 860.6 856.7 855.6 854.3 858.8 862.6 863.2 859.8 848.0 DAY-HOUR 11-12 22-15 10-12 23-12 6-21 30- 0 31-15 1-15 6- 0 11-12 14-12 4-12 MEAN QNH PRESSURE IN HPA 1012.1 1013.2 1010.7 1014.7 1014.0 1010.7 1008.5 1009.6 1013.3 1017.8 1018.9 1016.8 1013.3 MAX. QNH PRESSURE IN HPA 1017.5 1018.9 1020.1 1021.0 1017.5 1015.2 1014.6 1013.5 1019.7 1022.6 1023.2 1022.2 1023.2 DAY-HOUR 18- 9 8- 6 31-21 1- 6 8-18 25- 9 8-21 26-18 24- 6 28- 6 26- 6 18-18 MIN. QNH PRESSURE IN HPA 1003.0 1003.8 996.3 1008.7 1010.7 1006.2 1005.0 1003.5 1008.6 1013.0 1013.6 1009.8 996.3 DAY-HOUR 11-12 22-15 10-12 23-12 6-21 30- 0 31-15 1-15 6- 0 11-12 14-12 4-12 MEAN QFF PRESSURE IN HPA 1015.0 1015.1 1008.9 1008.9 1005.4 999.7 995.2 997.2 1003.4 1010.1 1016.0 1016.7 1007.6 MAX. QFF PRESSURE IN HPA 1021.1 1021.8 1022.5 1021.0 1012.7 1005.1 1002.6 1000.8 1010.9 1015.7 1022.4 1023.4 1023.4 DAY-HOUR 18-15 15-15 31- 6 1- 6 8-18 12-21 8-21 26-18 30- 6 22- 3 22- 6 18-18 MIN. QFF PRESSURE IN HPA 1004.5 1004.3 992.0 1001.9 1000.0 993.4 991.3 991.8 997.2 1002.3 1009.8 1008.7 991.3 DAY-HOUR 11-15 22-15 10-12 23-12 30-15 30- 6 31- 0 1-12 6- 0 11-12 11-12 4-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** 862.4 860.1 863.8 863.0 860.2 858.3 859.2 862.4 866.3 867.7 865.9 ****** MAX. QFE PRESSURE IN HPA ****** 866.6 864.6 868.6 865.8 863.2 863.5 861.6 867.0 870.5 870.8 869.8 ****** DAY ** 8 31 1 9 25 9 27 24 28 23 19 MIN. QFE PRESSURE IN HPA ****** 854.9 853.0 859.5 861.0 856.7 855.8 854.6 858.8 862.9 864.2 861.7 ****** DAY ** 11 29 24 7 30 31 2 6 12 15 13 MEAN QNH PRESSURE IN HPA ****** 1012.7 1010.1 1014.3 1013.4 1010.2 1008.0 1009.1 1012.7 1017.2 1018.8 1016.7 ****** MAX. QNH PRESSURE IN HPA ****** 1017.5 1015.2 1019.8 1016.6 1013.6 1014.0 1011.8 1018.0 1022.0 1022.3 1021.2 ****** DAY ** 8 31 1 9 25 9 27 24 28 23 19 MIN. QNH PRESSURE IN HPA ****** 1004.2 1002.0 1009.4 1011.1 1006.2 1005.2 1003.8 1008.6 1013.3 1014.8 1011.9 ****** DAY ** 11 29 24 7 30 31 2 6 12 15 13 MEAN QFF PRESSURE IN HPA ****** 1014.4 1008.0 1008.8 1004.6 999.1 994.7 996.5 1002.5 1009.2 1015.4 1016.3 ****** MAX. QFF PRESSURE IN HPA ****** 1020.7 1018.1 1020.0 1011.4 1004.1 1001.8 999.2 1009.3 1015.0 1020.4 1021.7 ****** DAY ** 4 31 1 9 13 9 31 30 28 22 18 MIN. QFF PRESSURE IN HPA ****** 1005.4 999.0 1002.3 1000.9 993.8 991.3 992.1 997.2 1004.0 1009.9 1011.2 ****** DAY ** 11 10 24 31 30 31 1 6 12 11 13 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 861.6 862.4 860.2 863.9 863.3 860.4 858.4 859.4 862.6 866.6 867.6 865.7 862.7 MAX. QFE PRESSURE IN HPA 865.2 866.6 865.9 868.6 865.8 863.3 863.7 862.0 867.0 870.5 870.4 869.7 870.5 DAY 19 25 31 1 14 13 9 26 24 28 29 19 MIN. QFE PRESSURE IN HPA 857.0 855.6 853.1 859.7 861.1 856.8 855.7 855.0 858.8 863.3 863.6 861.6 853.1 DAY 23 11 29 23 7 30 31 1 6 12 15 4 MEAN QNH PRESSURE IN HPA 1011.8 1012.7 1010.3 1014.4 1013.7 1010.4 1008.2 1009.4 1013.0 1017.5 1018.7 1016.4 1013.0 MAX. QNH PRESSURE IN HPA 1015.9 1017.5 1016.7 1019.8 1016.6 1013.8 1014.2 1012.3 1018.0 1022.0 1021.8 1021.0 1022.0 DAY 19 25 31 1 14 13 9 26 24 28 29 19 MIN. QNH PRESSURE IN HPA 1006.6 1005.0 1002.1 1009.7 1011.3 1006.4 1005.1 1004.3 1008.6 1013.8 1014.1 1011.8 1002.1 DAY 23 11 29 23 7 30 31 1 6 12 15 4 MEAN QFF PRESSURE IN HPA 1015.3 1015.1 1008.9 1009.3 1005.4 999.9 995.3 997.5 1003.6 1010.4 1016.5 1017.0 1007.9 MAX. QFF PRESSURE IN HPA 1019.7 1021.6 1019.1 1020.4 1010.6 1005.0 1002.2 1000.2 1010.3 1015.7 1021.8 1021.7 1021.8 DAY 19 15 31 1 8 13 9 26 30 22 22 19 MIN. QFF PRESSURE IN HPA 1007.9 1007.3 997.2 1003.7 1001.1 994.4 991.4 993.1 998.0 1005.8 1012.5 1010.9 991.4 DAY 11 11 10 23 30 30 31 1 6 11 6 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 862.4 863.5 861.3 864.7 864.0 860.9 859.0 860.0 863.5 867.5 868.6 866.6 863.5 MAX. QFE PRESSURE IN HPA 865.6 867.8 868.8 869.7 866.3 864.4 863.6 863.0 868.5 871.1 871.6 870.3 871.6 DAY 30 8 31 1 14 3 9 26 24 28 26 19 MIN. QFE PRESSURE IN HPA 858.0 857.0 853.4 860.3 862.0 857.2 856.1 854.8 859.7 863.8 864.7 861.6 853.4 DAY 11 13 10 23 31 30 31 1 6 12 15 4 MEAN QNH PRESSURE IN HPA 1012.8 1013.9 1011.5 1015.4 1014.6 1011.1 1008.9 1010.1 1013.9 1018.6 1019.7 1017.5 1014.0 MAX. QNH PRESSURE IN HPA 1016.4 1018.9 1020.0 1021.0 1017.2 1015.0 1014.1 1013.4 1019.7 1022.6 1023.2 1021.7 1023.2 DAY 30 8 31 1 14 3 9 26 24 28 26 19 MIN. QNH PRESSURE IN HPA 1007.7 1006.6 1002.5 1010.3 1012.3 1006.8 1005.6 1004.1 1009.7 1014.3 1015.4 1011.8 1002.5 DAY 11 13 10 23 31 30 31 1 6 12 15 4 MEAN QFF PRESSURE IN HPA ****** 1016.3 1009.9 1009.6 1005.8 999.9 995.4 997.5 1003.9 1010.9 1017.1 1017.8 ****** MAX. QFF PRESSURE IN HPA ****** 1021.8 1022.5 1021.0 1012.3 1005.0 1001.7 1000.5 1010.9 1015.5 1022.4 1022.6 ****** DAY ** 15 31 1 8 1 9 26 30 25 22 18 MIN. QFF PRESSURE IN HPA ****** 1008.0 998.8 1004.5 1001.3 993.4 991.9 992.0 998.0 1005.5 1012.5 1010.3 ****** DAY ** 22 10 23 30 30 31 1 6 12 11 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 862.3 863.4 861.2 864.5 864.2 861.0 859.1 860.0 863.3 867.3 868.1 866.1 863.4 MAX. QFE PRESSURE IN HPA 866.6 867.7 868.5 869.3 866.2 864.6 863.2 863.0 868.0 870.4 870.7 869.5 870.7 DAY 18 25 31 1 13 25 9 26 24 28 28 18 MIN. QFE PRESSURE IN HPA 855.4 857.2 849.9 860.2 862.0 857.1 856.2 854.9 859.4 863.5 864.2 860.8 849.9 DAY 11 13 10 23 31 30 31 1 6 30 15 4 MEAN QNH PRESSURE IN HPA 1012.6 1013.9 1011.3 1015.2 1014.8 1011.1 1008.9 1010.0 1013.8 1018.3 1019.2 1016.9 1013.8 MAX. QNH PRESSURE IN HPA 1017.5 1018.8 1019.7 1020.6 1017.1 1015.2 1013.6 1013.4 1019.1 1021.8 1022.2 1020.8 1022.2 DAY 18 25 31 1 13 25 9 26 24 28 28 18 MIN. QNH PRESSURE IN HPA 1004.8 1006.8 998.5 1010.2 1012.3 1006.7 1005.7 1004.2 1009.3 1014.0 1014.8 1010.9 998.5 DAY 11 13 10 23 31 30 31 1 6 30 15 4 MEAN QFF PRESSURE IN HPA ****** 1015.5 1009.1 1009.0 1006.0 999.8 995.5 997.2 1003.6 1010.2 1015.9 1016.4 ****** MAX. QFF PRESSURE IN HPA ****** 1021.2 1020.5 1020.1 1012.1 1005.1 1001.7 1000.3 1010.4 1014.7 1021.0 1021.1 ****** DAY ** 15 31 1 8 3 9 26 30 25 22 18 MIN. QFF PRESSURE IN HPA ****** 1007.1 994.4 1003.9 1001.8 993.7 991.8 992.3 997.6 1004.9 1010.4 1009.2 ****** DAY ** 22 10 23 30 30 31 1 6 11 15 12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 861.2 862.2 860.0 863.8 863.4 860.5 858.5 859.4 862.5 866.3 867.1 865.2 862.5 MAX. QFE PRESSURE IN HPA 865.7 866.4 868.0 868.4 865.7 864.1 862.2 862.6 866.7 869.3 869.7 869.4 869.7 DAY 18 8 31 1 8 25 8 26 24 27 28 18 MIN. QFE PRESSURE IN HPA 853.9 855.2 848.0 858.9 861.2 857.1 855.8 854.6 859.2 862.6 863.2 859.8 848.0 DAY 11 22 10 23 31 30 31 1 6 11 14 4 MEAN QNH PRESSURE IN HPA 1011.4 1012.6 1010.0 1014.3 1013.8 1010.5 1008.3 1009.3 1012.8 1017.2 1018.0 1016.0 1012.8 MAX. QNH PRESSURE IN HPA 1016.5 1017.3 1019.1 1019.6 1016.5 1014.7 1012.5 1013.0 1017.6 1020.6 1021.0 1020.7 1021.0 DAY 18 8 31 1 8 25 8 26 24 27 28 18 MIN. QNH PRESSURE IN HPA 1003.0 1004.5 996.3 1008.7 1011.4 1006.7 1005.2 1003.8 1009.1 1013.0 1013.6 1009.8 996.3 DAY 11 22 10 23 31 30 31 1 6 11 14 4 MEAN QFF PRESSURE IN HPA ****** 1014.1 1007.9 1008.6 1005.0 999.4 995.0 996.7 1002.7 1009.2 1014.7 1015.5 ****** MAX. QFF PRESSURE IN HPA ****** 1019.7 1020.3 1018.7 1009.8 1003.8 1000.5 1000.1 1008.6 1014.6 1019.5 1020.9 ****** DAY ** 15 31 1 9 12 8 26 29 25 21 18 MIN. QFF PRESSURE IN HPA ****** 1005.0 992.0 1001.9 1000.8 994.2 991.8 991.8 997.9 1002.3 1009.8 1008.7 ****** DAY ** 22 10 23 30 30 31 1 6 11 11 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 861.6 862.6 860.2 863.7 863.1 860.4 858.4 859.2 862.6 866.6 867.5 865.8 862.6 MAX. QFE PRESSURE IN HPA 866.4 867.0 867.5 868.4 865.7 863.7 862.2 862.2 866.9 870.1 870.5 870.5 870.5 DAY 18 8 31 1 8 25 8 26 24 27 28 18 MIN. QFE PRESSURE IN HPA 854.2 854.6 851.3 860.2 860.7 857.2 855.6 854.3 859.4 862.6 864.1 860.2 851.3 DAY 11 22 10 23 6 10 31 1 13 30 15 4 MEAN QNH PRESSURE IN HPA 1011.9 1013.0 1010.2 1014.2 1013.5 1010.4 1008.2 1009.1 1012.9 1017.5 1018.6 1016.6 1013.0 MAX. QNH PRESSURE IN HPA 1017.3 1018.0 1018.5 1019.6 1016.5 1014.2 1012.5 1012.5 1017.9 1021.5 1022.0 1022.0 1022.0 DAY 18 8 31 1 8 25 8 26 24 27 28 18 MIN. QNH PRESSURE IN HPA 1003.4 1003.8 1000.1 1010.2 1010.8 1006.8 1005.0 1003.5 1009.3 1013.0 1014.7 1010.2 1000.1 DAY 11 22 10 23 6 10 31 1 13 30 15 4 MEAN QFF PRESSURE IN HPA 1015.3 1015.2 1008.8 1008.8 1005.2 999.8 995.3 997.3 1003.6 1010.4 1016.3 1017.1 1007.8 MAX. QFF PRESSURE IN HPA 1021.1 1021.8 1019.4 1019.2 1011.6 1003.9 1000.3 1000.2 1009.4 1015.6 1021.9 1023.0 1023.0 DAY 18 15 31 1 8 12 8 26 30 22 21 18 MIN. QFF PRESSURE IN HPA 1004.5 1004.3 997.0 1004.5 1000.0 994.8 991.8 992.6 998.8 1003.9 1011.6 1009.0 991.8 DAY 11 22 10 22 30 30 31 1 1 11 11 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** 863.1 861.0 864.3 863.9 861.0 859.1 860.1 863.4 867.2 868.0 866.2 ****** MAX. QFE PRESSURE IN HPA ****** 866.8 868.5 868.9 866.6 864.4 863.3 863.1 867.3 870.6 871.0 870.7 ****** DAY ** 7 31 1 8 25 8 26 23 27 22 18 MIN. QFE PRESSURE IN HPA ****** 855.2 853.4 859.8 861.6 857.9 856.2 855.2 860.4 862.9 864.7 860.4 ****** DAY ** 22 10 23 30 10 31 1 12 30 15 4 MEAN QNH PRESSURE IN HPA ****** 1013.5 1011.1 1014.9 1014.4 1011.1 1009.0 1010.2 1013.8 1018.2 1019.1 1017.1 ****** MAX. QNH PRESSURE IN HPA ****** 1017.7 1019.7 1020.1 1017.5 1015.0 1013.8 1013.5 1018.3 1022.1 1022.5 1022.2 ****** DAY ** 7 31 1 8 25 8 26 23 27 22 18 MIN. QNH PRESSURE IN HPA ****** 1004.5 1002.5 1009.8 1011.8 1007.6 1005.7 1004.5 1010.5 1013.3 1015.4 1010.5 ****** DAY ** 22 10 23 30 10 31 1 12 30 15 4 MEAN QFF PRESSURE IN HPA ****** 1015.6 1009.5 1008.9 1005.7 999.9 995.5 997.6 1003.9 1010.6 1016.4 1017.4 ****** MAX. QFF PRESSURE IN HPA ****** 1021.7 1020.9 1019.2 1012.7 1004.5 1001.3 1000.8 1010.0 1015.5 1022.2 1023.4 ****** DAY ** 3 31 1 8 1 8 26 29 22 21 18 MIN. QFF PRESSURE IN HPA ****** 1004.6 1001.0 1004.1 1000.7 995.1 992.8 992.5 999.0 1005.5 1012.8 1009.8 ****** DAY ** 22 10 23 30 30 31 1 8 11 10 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** 863.0 860.8 864.2 863.6 860.9 858.9 860.0 863.1 866.9 868.0 866.1 ****** MAX. QFE PRESSURE IN HPA ****** 867.3 868.9 869.0 866.4 863.9 864.0 862.7 867.2 870.7 871.3 870.7 ****** DAY ** 7 31 8 8 12 8 26 23 27 22 18 MIN. QFE PRESSURE IN HPA ****** 856.2 854.8 859.5 860.6 857.9 855.8 854.8 860.1 863.2 863.2 861.8 ****** DAY ** 22 28 23 6 10 31 1 5 11 14 12 MEAN QNH PRESSURE IN HPA ****** 1013.4 1010.9 1014.8 1014.1 1011.0 1008.7 1010.0 1013.5 1017.9 1019.1 1017.0 ****** MAX. QNH PRESSURE IN HPA ****** 1018.3 1020.1 1020.3 1017.3 1014.4 1014.6 1013.1 1018.2 1022.2 1022.9 1022.2 ****** DAY ** 7 31 8 8 12 8 26 23 27 22 18 MIN. QNH PRESSURE IN HPA ****** 1005.7 1004.1 1009.4 1010.7 1007.6 1005.2 1004.1 1010.1 1013.6 1013.6 1012.0 ****** DAY ** 22 28 23 6 10 31 1 5 11 14 12 MEAN QFF PRESSURE IN HPA ****** 1015.0 1008.7 1008.4 1005.3 999.6 995.3 997.1 1003.3 1009.8 1015.7 1016.5 ****** MAX. QFF PRESSURE IN HPA ****** 1021.5 1020.4 1019.2 1012.2 1005.1 1002.6 999.9 1009.1 1015.3 1021.4 1022.0 ****** DAY ** 3 31 1 8 12 8 26 29 31 21 17 MIN. QFF PRESSURE IN HPA ****** 1006.3 1001.9 1002.5 1001.2 994.6 992.1 992.7 998.7 1004.8 1010.2 1010.7 ****** DAY ** 22 9 23 30 30 25 1 1 11 14 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.9 3.8 9.6 13.7 22.1 26.8 30.1 28.3 25.5 18.7 13.6 8.2 16.8 MINIMUN AIR TEMPERATURE (C) -1.3 -0.0 4.5 8.0 15.4 19.4 24.7 21.9 19.1 13.7 9.2 4.4 11.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 7 27 23 1 0 0 0 60 DAYS WITH MINIMUM TEMP. <=-4 7 0 0 0 0 0 0 0 0 0 0 0 7 DAYS WITH FREEZING MIN.<= 0 21 16 0 0 0 0 0 0 0 0 0 5 42 TEMPERATURE RECORDS LOWEST(C) -10.6 -2.6 0.8 2.4 9.0 14.8 18.8 18.6 17.0 7.8 2.2 -3.0 -10.6 DAY 25 24 19 5 7 20 3 10 7 29 13 27 MAXIMUM AIR TEMPERATURE (C) 5.6 8.3 14.8 19.0 28.1 33.6 36.1 34.8 32.3 24.2 19.2 13.1 22.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 13 28 31 31 29 0 0 0 132 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 11.6 12.6 19.4 26.8 34.2 37.4 39.0 39.8 34.4 29.0 23.6 20.4 39.8 DAY 13 27 10 27 21 24 17 14 9 7 5 2 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 8.3 10.3 11.0 12.7 14.2 11.4 12.9 13.2 10.5 10.0 8.7 10.8 MEAN DAILY TEMP. (MDT) (C) 2.2 4.1 9.6 13.5 21.7 26.5 30.4 28.4 25.7 19.0 14.2 8.7 17.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 69.2 165.4 290.3 228.5 140.7 6.4 0.0 0.0 900.5 HEATING DEG. DAYS(BASE 18 0C) 490.1 388.1 258.9 142.3 10.6 0.0 0.0 0.0 0.0 25.2 113.8 287.7 1716.7 DEWPOINT (MEAN C) -3.4 -3.0 -3.6 -0.3 -2.0 3.1 4.2 1.2 -2.5 -1.7 -0.6 -3.5 -1.0 MIXING RATIO (G/KG) 3.62 3.67 3.74 4.56 3.97 5.73 6.17 4.92 3.84 4.26 4.41 3.65 4.38 VAPOUR PRESSURE (HPA) 5.00 5.05 5.16 6.28 5.47 7.84 8.42 6.74 5.29 5.89 6.11 5.06 6.02 SATURATION DEF. (HPA) 2.16 3.11 7.14 10.27 22.44 28.71 35.43 32.80 28.21 16.37 9.99 6.40 16.92 RELATIVE HUMIDITY (MEAN %) 71 65 45 43 22 23 20 18 17 30 40 47 37 RELATIVE HUMIDITY (MAX. %) 87 82 66 63 35 34 29 26 25 40 55 62 50 RELATIVE HUMIDITY (MIN. %) 53 45 27 27 13 16 14 11 10 19 26 32 24 RELATIVE HUMIDITY (MEAN% 03UTC) 72 70 50 51 28 27 25 24 20 36 46 52 42 RELATIVE HUMIDITY (MEAN% 09UTC) 61 52 33 31 15 19 15 13 11 23 29 37 28 RELATIVE HUMIDITY (MEAN% 15UTC) 74 65 44 35 18 19 17 14 15 28 43 49 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 132.6 129.3 54.7 59.0 0.2 0.0 0.0 0.0 0.0 44.8 25.0 53.0 498.6 DAYS WITH PRECIPITATION >=10 5 5 1 2 0 0 0 0 0 2 1 3 19 DAYS WITH PRECIPITATION >= 5 11 6 2 2 0 0 0 0 0 2 1 3 27 DAYS WITH PRECIPITATION >= 1 16 10 3 4 0 0 0 0 0 2 2 3 40 DAYS WITH PRECIPITATION 18 10 8 5 2 0 0 0 0 5 4 4 56 GREATEST DAILY PRECIPITATION 24.0 39.7 45.0 38.0 0.2 0.0 0.0 0.0 0.0 32.0 20.0 24.0 45.0 DAY 24 2 11 2 11 ** ** ** ** 28 11 24 DAY WITH THUNDER STORM 3 4 2 3 2 0 0 0 0 2 3 0 19 DAYS WITH SNOW OR SLEET 14 6 0 0 0 0 0 0 0 0 0 4 24 DAYS WITH DUST 0 0 2 0 2 2 6 0 2 0 0 0 14 WIND DIRECTION (PREVAILING) 180 90 180 270 90 270 270 270 270 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 5.7 4.7 8.4 5.5 4.8 8.1 8.1 7.2 6.7 5.9 4.3 10.4 6.5 PREVAILING WIND PERCENT 14.1 19.2 17.7 18.3 12.5 20.8 16.5 17.3 16.7 8.5 8.8 7.3 12.0 CALMS PERCENT OF WIND 56.9 46.9 28.6 45.4 39.9 43.3 42.7 44.8 47.1 58.5 66.3 68.5 49.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 142 131 138 207 164 275 285 292 300 247 188 159 230 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.5 2.0 1.1 0.5 2.0 1.7 2.1 1.6 0.5 0.3 0.9 0.5 WIND STEADINESES (MEAN %) 36.4 55.6 37.0 34.4 14.3 47.6 41.5 58.3 59.3 25.0 20.0 40.9 16.1 WIND SPEED (MEAN KNOTS) 2.2 2.7 5.4 3.2 3.5 4.2 4.1 3.6 2.7 2.0 1.5 2.2 3.1 FASTEST WIND DIRECTION 30 120 90 90 150 360 300 260 340 330 150 160 160 FASTEST WIND SPEED (KNOTS) 19 19 39 19 23 19 29 19 23 17 16 43 43 DAY 30 1 21 1 11 6 23 14 8 8 9 24 DAYS WITH SKY CLEAR (0-2)/8 9 11 17 12 21 30 24 31 30 21 20 14 240 DAYS WITH P.CLOUDY (3-6)/8 6 11 8 12 8 0 7 0 0 7 5 11 75 DAYS WITH CLOUDY (7-8)/8 16 6 6 6 2 0 0 0 0 3 5 6 50 DAYS WITH VISIBILITY =< 2 KM 5 2 0 1 0 0 0 0 0 0 0 0 8 DURATION OF SUNSHINE HOURS 149.2 198.9 245.7 247.8 323.3 374.1 334.7 367.3 326.6 244.0 218.9 164.8 3195.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 865.3 862.3 865.1 863.2 862.4 860.2 857.6 859.5 862.4 866.9 868.3 866.8 863.3 MAX. QFE PRESSURE IN HPA 872.3 869.0 872.6 867.6 866.6 866.3 862.8 863.0 867.3 871.2 873.5 871.8 873.5 DAY-HOUR 26- 6 8- 6 9- 9 24- 9 18- 9 4-18 15- 6 4-18 27-18 30- 6 14- 6 13- 6 MIN. QFE PRESSURE IN HPA 858.3 851.0 860.7 852.2 856.2 854.3 852.7 856.4 858.7 860.5 862.4 859.4 851.0 DAY-HOUR 4-12 10- 3 18-12 2- 0 12-12 25-15 5-15 1- 0 4- 0 14- 0 1-12 25- 0 MEAN QNH PRESSURE IN HPA 1016.1 1012.6 1015.8 1013.7 1012.8 1010.2 1007.3 1009.4 1012.8 1017.8 1019.4 1017.7 1013.8 MAX. QNH PRESSURE IN HPA 1024.0 1020.3 1024.3 1018.7 1017.5 1017.2 1013.2 1013.4 1018.3 1022.8 1025.4 1023.4 1025.4 DAY-HOUR 26- 6 8- 6 9- 9 24- 9 18- 9 4-18 15- 6 4-18 27-18 30- 6 14- 6 13- 6 MIN. QNH PRESSURE IN HPA 1008.1 999.7 1010.8 1001.1 1005.7 1003.5 1001.7 1005.9 1008.5 1010.6 1012.7 1009.3 999.7 DAY-HOUR 4-12 10- 3 18-12 2- 0 12-12 25-15 5-15 1- 0 4- 0 14- 0 1-12 25- 0 MEAN QFF PRESSURE IN HPA 1018.5 1013.8 1013.7 1009.2 1004.0 998.8 994.2 997.4 1002.2 1010.8 1015.1 1016.6 1007.9 MAX. QFF PRESSURE IN HPA 1029.5 1021.4 1022.7 1017.0 1010.1 1006.2 1000.4 1001.6 1007.8 1019.0 1024.4 1024.5 1029.5 DAY-HOUR 26- 6 13- 6 9- 6 4- 9 7- 9 4-15 15- 3 28-18 27- 6 30- 6 14- 6 28- 6 MIN. QFF PRESSURE IN HPA 1007.4 1000.1 1005.7 996.9 997.9 991.5 989.3 991.8 998.4 1002.5 1006.4 1010.2 989.3 DAY-HOUR 4-12 10- 3 24- 0 2- 0 11-21 25-15 13- 0 14- 0 4- 0 14- 0 1-12 24-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 865.1 861.9 864.7 862.6 861.9 859.8 857.2 859.0 861.9 866.4 867.9 866.7 862.9 MAX. QFE PRESSURE IN HPA 871.2 868.1 871.1 866.6 865.0 864.9 861.4 862.6 865.6 870.0 872.6 870.8 872.6 DAY 20 8 10 25 19 5 15 4 27 16 14 13 MIN. QFE PRESSURE IN HPA 859.8 852.0 860.7 852.2 857.0 854.8 853.2 856.4 858.7 860.5 863.0 859.4 852.0 DAY 4 10 24 2 12 26 5 1 4 14 2 25 MEAN QNH PRESSURE IN HPA 1015.8 1012.2 1015.4 1013.0 1012.2 1009.7 1006.8 1008.8 1012.1 1017.3 1019.0 1017.7 1013.3 MAX. QNH PRESSURE IN HPA 1022.8 1019.2 1022.6 1017.5 1015.7 1015.6 1011.6 1013.0 1016.4 1021.4 1024.3 1022.3 1024.3 DAY 20 8 10 25 19 5 15 4 27 16 14 13 MIN. QNH PRESSURE IN HPA 1009.8 1000.9 1010.8 1001.1 1006.6 1004.1 1002.2 1005.9 1008.5 1010.6 1013.4 1009.3 1000.9 DAY 4 10 24 2 12 26 5 1 4 14 2 25 MEAN QFF PRESSURE IN HPA 1017.9 1013.1 1013.2 1008.5 1003.4 998.5 993.6 996.6 1001.4 1009.9 1014.3 1016.1 1007.2 MAX. QFF PRESSURE IN HPA 1027.4 1020.3 1020.6 1014.5 1008.3 1004.8 999.0 999.9 1005.5 1016.6 1022.6 1024.2 1027.4 DAY 26 12 10 5 15 5 15 29 28 30 14 28 MIN. QFF PRESSURE IN HPA 1010.7 1000.6 1005.7 996.9 998.3 992.2 989.3 991.8 998.4 1002.5 1007.8 1010.3 989.3 DAY 5 10 24 2 30 26 13 14 4 14 2 25 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 864.9 861.9 864.8 862.8 862.2 860.0 857.5 859.2 862.2 866.6 868.1 866.7 863.1 MAX. QFE PRESSURE IN HPA 871.2 867.9 871.0 866.7 865.5 865.2 862.3 862.3 866.2 870.4 872.3 870.8 872.3 DAY 20 8 10 25 19 5 15 4 28 30 14 13 MIN. QFE PRESSURE IN HPA 860.1 851.0 860.7 854.3 856.8 855.0 853.4 856.4 858.7 860.5 863.3 859.4 851.0 DAY 4 10 24 2 13 26 5 1 4 14 2 25 MEAN QNH PRESSURE IN HPA 1015.6 1012.1 1015.4 1013.2 1012.5 1010.0 1007.2 1009.1 1012.5 1017.5 1019.2 1017.7 1013.5 MAX. QNH PRESSURE IN HPA 1022.8 1019.0 1022.5 1017.6 1016.3 1015.9 1012.6 1012.6 1017.1 1021.8 1024.0 1022.3 1024.0 DAY 20 8 10 25 19 5 15 4 28 30 14 13 MIN. QNH PRESSURE IN HPA 1010.1 999.7 1010.8 1003.5 1006.4 1004.3 1002.5 1005.9 1008.5 1010.6 1013.8 1009.3 999.7 DAY 4 10 24 2 13 26 5 1 4 14 2 25 MEAN QFF PRESSURE IN HPA 1018.4 1013.7 1013.9 1009.1 1004.1 998.9 994.4 997.5 1002.6 1011.1 1015.6 1017.1 1008.0 MAX. QFF PRESSURE IN HPA 1027.8 1020.9 1021.7 1015.3 1009.8 1005.1 1000.4 1000.6 1007.3 1018.5 1023.7 1023.8 1027.8 DAY 26 12 10 8 8 5 15 16 28 30 14 28 MIN. QFF PRESSURE IN HPA 1011.1 1000.1 1007.4 999.7 999.7 992.3 990.2 992.7 998.6 1003.4 1009.1 1010.7 990.2 DAY 4 10 24 2 22 25 5 14 4 14 2 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 866.0 862.9 865.6 863.6 863.0 860.6 857.9 859.8 863.0 867.5 869.0 867.5 863.9 MAX. QFE PRESSURE IN HPA 872.3 869.0 872.1 867.2 866.5 866.0 862.8 863.0 867.2 871.2 873.5 871.8 873.5 DAY 26 8 9 19 18 5 15 16 27 30 14 13 MIN. QFE PRESSURE IN HPA 860.5 853.5 861.7 855.2 857.3 855.5 853.9 856.5 859.9 862.2 864.6 860.4 853.5 DAY 4 10 24 2 12 26 5 1 4 14 2 25 MEAN QNH PRESSURE IN HPA 1016.8 1013.3 1016.4 1014.1 1013.5 1010.6 1007.6 1009.7 1013.4 1018.6 1020.3 1018.6 1014.4 MAX. QNH PRESSURE IN HPA 1024.0 1020.3 1023.8 1018.2 1017.4 1016.8 1013.2 1013.4 1018.2 1022.8 1025.4 1023.4 1025.4 DAY 26 8 9 19 18 5 15 16 27 30 14 13 MIN. QNH PRESSURE IN HPA 1010.6 1002.6 1011.9 1004.5 1006.9 1004.9 1003.0 1006.0 1009.9 1012.5 1015.2 1010.5 1002.6 DAY 4 10 24 2 12 26 5 1 4 14 2 25 MEAN QFF PRESSURE IN HPA 1019.6 1014.8 1014.5 1009.6 1004.7 999.1 994.5 997.6 1002.8 1011.6 1016.3 1017.7 1008.6 MAX. QFF PRESSURE IN HPA 1029.5 1021.4 1022.7 1016.8 1009.6 1005.7 1000.3 1001.4 1007.8 1019.0 1024.4 1024.5 1029.5 DAY 26 13 9 4 8 5 15 16 27 30 14 28 MIN. QFF PRESSURE IN HPA 1011.4 1004.1 1008.1 1001.2 1000.0 992.4 990.9 993.0 999.1 1005.9 1009.9 1011.7 990.9 DAY 4 15 24 2 12 25 5 14 5 14 1 25 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 865.8 862.8 865.6 863.8 863.1 860.6 857.9 859.7 862.8 867.3 868.5 867.0 863.7 MAX. QFE PRESSURE IN HPA 871.7 868.7 872.6 867.6 866.6 865.8 862.8 862.9 866.6 870.8 873.2 871.3 873.2 DAY 26 8 9 24 18 4 15 16 27 30 14 13 MIN. QFE PRESSURE IN HPA 859.6 854.6 862.0 857.8 856.9 855.9 853.8 856.6 859.9 862.5 864.1 860.4 853.8 DAY 4 15 2 2 12 26 5 1 4 14 1 25 MEAN QNH PRESSURE IN HPA 1016.6 1013.1 1016.3 1014.3 1013.5 1010.7 1007.6 1009.7 1013.1 1018.3 1019.6 1018.0 1014.2 MAX. QNH PRESSURE IN HPA 1023.3 1019.9 1024.3 1018.7 1017.5 1016.6 1013.2 1013.3 1017.5 1022.3 1025.0 1022.9 1025.0 DAY 26 8 9 24 18 4 15 16 27 30 14 13 MIN. QNH PRESSURE IN HPA 1009.5 1003.8 1012.3 1007.5 1006.5 1005.3 1002.9 1006.1 1009.9 1012.8 1014.7 1010.5 1002.9 DAY 4 15 2 2 12 26 5 1 4 14 1 25 MEAN QFF PRESSURE IN HPA 1018.7 1014.0 1014.0 1009.7 1004.6 999.1 994.2 997.4 1002.3 1010.9 1014.8 1016.3 1008.0 MAX. QFF PRESSURE IN HPA 1026.8 1020.7 1022.3 1017.0 1010.1 1005.5 1000.4 1001.3 1007.3 1017.4 1022.6 1023.5 1026.8 DAY 26 12 9 4 7 4 15 16 27 30 14 28 MIN. QFF PRESSURE IN HPA 1009.4 1004.8 1008.1 1003.7 999.3 993.1 990.4 992.4 998.7 1006.2 1008.7 1012.3 990.4 DAY 4 15 24 15 12 25 13 14 9 14 1 25 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 864.7 861.7 864.5 863.0 862.2 860.1 857.3 859.2 862.0 866.5 867.5 866.1 862.9 MAX. QFE PRESSURE IN HPA 870.5 867.6 871.7 866.7 865.9 866.0 861.8 862.2 866.2 870.3 872.2 870.0 872.2 DAY 26 8 9 24 18 4 15 16 27 30 14 13 MIN. QFE PRESSURE IN HPA 858.3 853.8 860.7 856.3 856.2 855.5 853.1 856.6 859.4 862.7 862.4 859.9 853.1 DAY 4 15 18 1 12 25 5 1 4 14 1 25 MEAN QNH PRESSURE IN HPA 1015.3 1012.0 1015.2 1013.4 1012.5 1010.1 1006.9 1009.1 1012.3 1017.4 1018.6 1016.9 1013.3 MAX. QNH PRESSURE IN HPA 1022.0 1018.7 1023.3 1017.6 1016.7 1016.8 1012.0 1012.5 1017.1 1021.7 1023.9 1021.4 1023.9 DAY 26 8 9 24 18 4 15 16 27 30 14 13 MIN. QNH PRESSURE IN HPA 1008.1 1002.9 1010.8 1005.8 1005.7 1004.9 1002.1 1006.1 1009.3 1013.1 1012.7 1009.9 1002.1 DAY 4 15 18 1 12 25 5 1 4 14 1 25 MEAN QFF PRESSURE IN HPA 1017.3 1012.9 1013.0 1008.9 1003.7 998.7 993.7 997.0 1001.6 1010.0 1013.9 1015.3 1007.2 MAX. QFF PRESSURE IN HPA 1026.9 1019.6 1021.5 1016.3 1008.5 1005.8 999.4 1001.0 1006.4 1017.0 1021.5 1022.0 1026.9 DAY 25 8 9 4 8 4 15 16 27 30 14 28 MIN. QFF PRESSURE IN HPA 1007.4 1003.3 1007.9 1002.3 998.3 993.1 989.9 992.5 998.7 1005.0 1006.4 1011.0 989.9 DAY 4 15 31 1 11 25 13 14 4 13 1 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 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 865.2 862.1 864.6 862.8 862.0 859.7 857.1 859.3 862.2 866.7 868.1 866.4 863.0 MAX. QFE PRESSURE IN HPA 870.6 867.3 871.9 866.3 865.3 866.0 861.7 862.4 866.3 870.8 872.9 870.1 872.9 DAY 26 7 9 24 18 4 15 4 27 30 14 28 MIN. QFE PRESSURE IN HPA 858.6 855.3 861.0 855.4 856.2 854.3 852.7 856.7 859.3 862.3 862.8 859.6 852.7 DAY 1 15 31 1 12 25 5 1 4 13 1 24 MEAN QNH PRESSURE IN HPA 1015.9 1012.4 1015.3 1013.2 1012.2 1009.6 1006.7 1009.2 1012.5 1017.6 1019.2 1017.3 1013.4 MAX. QNH PRESSURE IN HPA 1022.1 1018.3 1023.6 1017.2 1016.0 1016.8 1011.9 1012.7 1017.2 1022.3 1024.7 1021.5 1024.7 DAY 26 7 9 24 18 4 15 4 27 30 14 28 MIN. QNH PRESSURE IN HPA 1008.4 1004.6 1011.1 1004.8 1005.7 1003.5 1001.7 1006.2 1009.2 1012.6 1013.2 1009.5 1001.7 DAY 1 15 31 1 12 25 5 1 4 13 1 24 MEAN QFF PRESSURE IN HPA 1018.7 1013.9 1013.6 1009.1 1003.8 998.4 994.0 997.6 1002.6 1011.2 1015.7 1016.7 1007.9 MAX. QFF PRESSURE IN HPA 1029.1 1020.6 1022.0 1015.8 1009.3 1006.2 999.4 1001.5 1007.7 1018.6 1023.8 1023.0 1029.1 DAY 25 12 9 4 7 4 15 16 27 30 14 28 MIN. QFF PRESSURE IN HPA 1008.9 1005.3 1007.1 1000.5 999.7 991.5 989.7 993.3 998.4 1005.1 1008.0 1011.3 989.7 DAY 1 15 31 1 29 25 5 14 5 13 1 24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 865.7 862.6 865.5 863.6 862.7 860.6 858.2 860.2 863.0 867.2 868.6 867.0 863.8 MAX. QFE PRESSURE IN HPA 870.9 868.5 872.4 867.3 866.3 866.3 862.6 863.0 867.3 871.0 873.4 871.0 873.4 DAY 19 7 9 24 18 4 15 4 27 30 14 12 MIN. QFE PRESSURE IN HPA 859.9 855.8 862.4 854.7 857.7 856.0 854.3 857.8 860.1 862.3 863.4 859.6 854.3 DAY 4 9 18 1 12 25 5 1 4 13 1 24 MEAN QNH PRESSURE IN HPA 1016.5 1013.0 1016.3 1014.1 1013.1 1010.7 1008.0 1010.2 1013.4 1018.2 1019.8 1018.0 1014.3 MAX. QNH PRESSURE IN HPA 1022.4 1019.7 1024.1 1018.3 1017.2 1017.2 1013.0 1013.4 1018.3 1022.5 1025.3 1022.5 1025.3 DAY 19 7 9 24 18 4 15 4 27 30 14 12 MIN. QNH PRESSURE IN HPA 1009.9 1005.2 1012.7 1004.0 1007.4 1005.4 1003.5 1007.5 1010.1 1012.6 1013.9 1009.5 1003.5 DAY 4 9 18 1 12 25 5 1 4 13 1 24 MEAN QFF PRESSURE IN HPA 1019.2 1014.4 1014.3 1009.6 1004.3 999.2 994.9 998.1 1002.8 1011.4 1015.9 1017.1 1008.4 MAX. QFF PRESSURE IN HPA 1027.8 1021.2 1022.4 1016.8 1008.6 1006.0 999.9 1001.6 1007.7 1018.7 1023.9 1023.9 1027.8 DAY 25 7 9 4 14 4 15 28 27 30 14 28 MIN. QFF PRESSURE IN HPA 1009.7 1004.9 1008.0 999.5 998.5 992.9 991.7 993.6 999.5 1004.4 1008.6 1010.2 991.7 DAY 4 9 31 1 11 25 12 14 5 13 1 24 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 865.5 862.5 865.3 863.6 862.5 860.4 858.0 859.7 862.6 867.0 868.4 866.9 863.5 MAX. QFE PRESSURE IN HPA 871.3 868.4 872.2 867.5 866.1 866.0 862.1 862.7 866.6 870.5 872.8 871.0 872.8 DAY 19 7 9 24 18 4 15 4 27 15 14 12 MIN. QFE PRESSURE IN HPA 860.5 853.6 861.7 854.4 857.7 856.0 854.5 857.3 859.7 861.4 863.4 859.6 853.6 DAY 1 9 18 1 11 25 5 13 3 13 1 24 MEAN QNH PRESSURE IN HPA 1016.3 1012.8 1016.0 1014.1 1012.9 1010.4 1007.7 1009.7 1012.9 1017.9 1019.6 1017.9 1014.0 MAX. QNH PRESSURE IN HPA 1022.9 1019.6 1023.9 1018.5 1016.9 1016.8 1012.4 1013.1 1017.5 1022.0 1024.6 1022.5 1024.6 DAY 19 7 9 24 18 4 15 4 27 15 14 12 MIN. QNH PRESSURE IN HPA 1010.6 1002.7 1011.9 1003.6 1007.4 1005.4 1003.7 1006.9 1009.7 1011.6 1013.9 1009.5 1002.7 DAY 1 9 18 1 11 25 5 13 3 13 1 24 MEAN QFF PRESSURE IN HPA 1018.4 1013.7 1013.6 1009.4 1003.8 998.9 994.4 997.3 1002.1 1010.6 1014.8 1016.2 1007.8 MAX. QFF PRESSURE IN HPA 1027.5 1020.6 1021.5 1015.8 1009.1 1005.7 999.2 1000.9 1006.6 1017.2 1022.7 1023.5 1027.5 DAY 25 11 9 3 14 4 15 28 27 29 13 28 MIN. QFF PRESSURE IN HPA 1010.1 1001.6 1007.6 999.3 997.9 993.1 989.9 992.8 998.7 1003.2 1008.1 1010.6 989.9 DAY 4 9 31 1 11 25 12 13 9 13 1 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ILAM (40780) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 33 38 N LONGITUDE 46 26 E DATA PROCESSING CENTER ELEVATION 1337.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.6 4.5 9.1 16.5 19.5 27.1 29.1 28.6 25.2 17.6 12.5 5.2 16.6 MINIMUN AIR TEMPERATURE (C) 1.4 0.7 5.1 11.1 13.7 21.0 22.3 22.4 19.5 13.2 8.3 1.8 11.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 14 27 21 7 0 0 0 69 DAYS WITH MINIMUM TEMP. <=-4 1 3 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH FREEZING MIN.<= 0 6 13 3 0 0 0 0 0 0 0 0 10 32 TEMPERATURE RECORDS LOWEST(C) -4.2 -5.4 -2.0 4.4 8.6 15.0 18.2 19.2 15.4 10.0 5.0 -1.2 -5.4 DAY 28 10 8 13 24 4 8 31 21 23 26 16 MAXIMUM AIR TEMPERATURE (C) 8.7 9.0 13.3 21.7 25.2 32.8 35.6 35.1 31.5 22.9 17.7 9.2 21.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 23 31 31 21 0 0 0 107 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.6 15.6 20.6 28.8 30.4 37.6 39.6 39.6 36.4 28.6 23.8 13.8 39.6 DAY 6 24 29 25 9 25 31 1 1 13 2 8 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 8.3 8.2 10.6 11.5 11.8 13.3 12.7 12.0 9.7 9.4 7.4 10.2 MEAN DAILY TEMP. (MDT) (C) 5.0 4.8 9.2 16.4 19.5 26.9 29.0 28.8 25.5 18.1 13.0 5.5 16.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 9.2 7.2 176.7 246.5 240.9 134.6 5.2 0.0 0.0 820.3 HEATING DEG. DAYS(BASE 18 0C) 401.7 368.3 273.2 81.4 12.0 0.0 0.0 0.0 0.0 31.0 151.9 387.3 1706.8 DEWPOINT (MEAN C) -1.2 -4.0 1.7 0.5 -2.4 -0.4 3.2 1.7 -3.0 4.2 -0.1 -1.1 -0.1 MIXING RATIO (G/KG) 4.22 3.69 5.24 4.79 3.98 4.52 5.92 5.27 3.77 6.23 4.57 4.35 4.71 VAPOUR PRESSURE (HPA) 5.82 5.10 7.20 6.60 5.47 6.19 8.08 7.21 5.20 8.60 6.32 6.00 6.48 SATURATION DEF. (HPA) 2.84 3.59 4.80 13.07 17.87 30.79 33.36 33.07 27.92 12.09 8.57 3.04 15.92 RELATIVE HUMIDITY (MEAN %) 69 59 63 38 25 18 21 19 17 45 46 67 41 RELATIVE HUMIDITY (MAX. %) 84 75 80 54 39 27 30 29 27 61 62 85 54 RELATIVE HUMIDITY (MIN. %) 51 39 43 23 15 11 13 11 9 29 26 48 27 RELATIVE HUMIDITY (MEAN% 03UTC) 70 67 66 45 32 24 27 25 22 52 51 70 46 RELATIVE HUMIDITY (MEAN% 09UTC) 56 47 49 27 17 12 14 12 11 32 31 55 30 RELATIVE HUMIDITY (MEAN% 15UTC) 78 59 63 33 20 13 17 16 15 43 47 74 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 94.8 148.5 128.2 33.9 0.2 0.0 0.0 0.0 0.0 26.1 47.2 186.7 665.6 DAYS WITH PRECIPITATION >=10 3 3 5 2 0 0 0 0 0 1 1 7 22 DAYS WITH PRECIPITATION >= 5 6 5 9 3 0 0 0 0 0 3 4 9 39 DAYS WITH PRECIPITATION >= 1 10 7 13 4 0 0 0 0 0 6 4 14 58 DAYS WITH PRECIPITATION 11 8 15 6 1 0 0 0 0 8 4 15 68 GREATEST DAILY PRECIPITATION 33.0 86.0 26.0 12.0 0.2 0.0 0.0 0.0 0.0 10.6 25.0 38.0 86.0 DAY 14 26 6 17 2