STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** 26.9 ***** 20.7 15.8 11.2 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** 21.5 19.4 14.6 9.5 5.0 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** **** **** **** **** 19 6 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** **** **** **** **** 0 0 0 0 0 **** DAYS WITH FREEZING MIN.<= 0 **** **** **** **** **** **** **** 0 0 0 0 0 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** ***** ***** ***** ***** 18.0 16.0 11.0 7.0 3.0 ***** DAY ** ** ** ** ** ** ** 18 30 13 23 6 MAXIMUM AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 23.7 18.9 14.8 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** **** **** **** **** **** **** **** 0 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** **** **** **** **** **** **** **** 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** ***** ***** ***** ***** ***** ***** ***** 27.0 25.0 19.0 ***** DAY ** ** ** ** ** ** ** ** ** 6 28 9 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 9.1 9.4 9.8 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** ***** ***** ***** ***** ***** ***** 19.2 14.2 9.9 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** ****** ****** ****** ****** ****** 0.0 ****** 5.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** ****** ****** ****** ****** ****** 0.0 ****** 3.0 102.5 210.0 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** 21.8 ***** 16.7 12.8 8.4 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** 16.72 ****** 11.96 9.26 6.91 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** 26.35 ****** 19.19 14.93 11.16 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** 9.81 ****** 5.59 3.28 2.38 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** 75 *** 79 83 84 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** 86 92 91 93 94 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** 67 79 69 73 74 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** 84 92 90 90 89 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** 71 79 71 73 78 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** *** 83 88 89 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** ****** ****** ****** ****** 80.0 88.0 4.0 274.0 15.0 ****** DAYS WITH PRECIPITATION >=10 **** **** **** **** **** **** **** 2 2 0 6 0 **** DAYS WITH PRECIPITATION >= 5 **** **** **** **** **** **** **** 6 5 0 6 1 **** DAYS WITH PRECIPITATION >= 1 **** **** **** **** **** **** **** 7 7 2 9 3 **** DAYS WITH PRECIPITATION **** **** **** **** **** **** **** 7 7 2 10 3 **** GREATEST DAILY PRECIPITATION ****** ****** ****** ****** ****** ****** ****** 30.0 33.0 3.0 70.0 9.0 ****** DAY ** ** ** ** ** ** ** 17 11 25 12 4 DAY WITH THUNDER STORM **** **** **** **** **** **** **** 0 0 0 0 0 **** DAYS WITH SNOW OR SLEET **** **** **** **** **** **** **** 0 0 0 0 0 **** DAYS WITH DUST **** **** **** **** **** **** **** 0 0 0 0 0 **** WIND DIRECTION (PREVAILING) *** *** *** *** *** *** *** 315 *** 315 *** *** *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** **** **** **** 3.9 **** 3.9 **** **** **** PREVAILING WIND PERCENT ***** ***** ***** ***** ***** ***** ***** 33.3 ***** 48.2 ***** ***** ***** CALMS PERCENT OF WIND ***** ***** ***** ***** ***** ***** ***** 23.3 ***** 32.8 ***** ***** ***** NO. OF WIND OBSERVATION **** **** **** **** **** **** **** 120 84 137 61 0 402 VECTOR WIND DIRECTION (MEAN) *** *** *** *** *** *** *** 328 *** 326 *** *** *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** **** **** **** 2.8 **** 2.4 **** **** **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** ***** ***** ***** 82.4 ***** 96.0 ***** ***** ***** WIND SPEED (MEAN KNOTS) **** **** **** **** **** **** **** 3.4 **** 2.5 **** **** **** FASTEST WIND DIRECTION *** *** *** *** *** *** *** 360 *** 310 *** *** *** FASTEST WIND SPEED (KNOTS) *** *** *** *** *** *** *** 17 *** 12 *** *** *** DAY ** ** ** ** ** ** ** 25 ** 8 ** ** DAYS WITH SKY CLEAR (0-2)/8 **** **** **** **** **** **** **** 9 4 10 4 7 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** **** **** **** **** 9 11 14 9 7 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** **** **** **** **** 13 12 7 15 14 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** **** **** **** **** 0 0 0 3 0 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.0 1015.0 1017.9 1018.0 1016.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1017.2 1023.4 1025.9 1031.4 1038.5 ****** DAY ** ** ** ** ** ** ** 17 30 11 12 2 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.8 1007.9 1012.1 1004.4 1005.9 ****** DAY ** ** ** ** ** ** ** 1 8 6 24 18 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1005.3 1012.3 1015.2 1015.2 1014.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1014.5 1020.7 1023.2 1028.7 1035.8 ****** DAY ** ** ** ** ** ** ** 17 30 11 12 2 MIN. 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QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.6 ****** 1011.3 1005.9 1005.9 ****** DAY ** ** ** ** ** ** ** 1 ** 6 22 12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.0 ****** 1014.2 1015.0 1012.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.9 ****** 1022.6 1028.8 1032.1 ****** DAY ** ** ** ** ** ** ** 17 ** 11 11 1 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.9 ****** 1008.6 1003.2 1003.2 ****** DAY ** ** ** ** ** ** ** 1 ** 6 22 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.1 1018.1 1015.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.0 1032.6 1037.5 ****** DAY ** ** ** ** ** ** ** ** ** 10 11 1 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.5 1005.3 1005.3 ****** DAY ** ** ** ** ** ** ** ** ** 6 22 18 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.4 1015.4 1012.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.3 1029.9 1034.8 ****** DAY ** ** ** ** ** ** ** ** ** 10 11 1 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.8 1002.6 1002.6 ****** DAY ** ** ** ** ** ** ** ** ** 6 22 18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.7 1015.7 1013.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.6 1030.1 1035.0 ****** DAY ** ** ** ** ** ** ** ** ** 10 11 1 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.2 1002.9 1002.9 ****** DAY ** ** ** ** ** ** ** ** ** 6 22 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.3 8.0 7.0 13.0 16.6 22.2 24.5 25.4 20.7 17.6 13.4 8.3 15.5 MINIMUN AIR TEMPERATURE (C) 4.2 4.7 4.8 9.2 12.9 18.1 20.9 21.5 17.7 13.9 9.4 5.4 11.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 20 23 2 0 0 0 47 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 2 1 1 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS LOWEST(C) 1.0 0.0 0.0 0.0 6.0 15.0 18.0 19.0 12.0 10.0 5.0 1.0 0.0 DAY 18 13 25 2 2 1 2 9 28 30 14 13 MAXIMUM AIR TEMPERATURE (C) 13.1 11.1 9.7 17.4 19.7 26.2 28.3 29.3 24.6 22.2 17.9 12.1 19.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 7 15 4 0 0 0 29 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 26.0 22.0 29.0 24.0 31.0 32.0 33.0 33.0 25.0 26.0 25.0 33.0 DAY 28 3 4 8 18 25 18 6 15 5 4 5 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 6.4 4.9 8.2 6.8 8.1 7.4 7.8 6.9 8.3 8.5 6.7 7.4 MEAN DAILY TEMP. (MDT) (C) 8.6 7.9 7.2 13.3 16.3 22.1 24.6 25.4 21.2 18.0 13.6 8.8 15.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.0 0.0 44.0 111.5 137.0 38.5 1.0 0.0 0.0 333.0 HEATING DEG. DAYS(BASE 18 0C) 281.5 281.5 334.0 152.0 57.0 0.0 0.0 0.0 8.5 23.0 132.5 286.0 1556.0 DEWPOINT (MEAN C) 5.9 5.3 5.5 10.4 14.0 17.7 20.0 21.8 18.8 15.0 10.3 5.4 12.5 MIXING RATIO (G/KG) 5.83 5.55 5.61 8.01 10.07 12.81 14.83 16.72 13.82 10.71 7.89 5.63 9.79 VAPOUR PRESSURE (HPA) 9.46 8.99 9.09 12.88 16.14 20.40 23.49 26.43 22.01 17.22 12.73 9.15 15.67 SATURATION DEF. (HPA) 2.50 1.97 1.06 2.69 3.04 6.72 7.54 6.49 3.06 3.26 3.16 2.03 3.63 RELATIVE HUMIDITY (MEAN %) 81 85 91 85 85 77 77 82 90 85 83 83 84 RELATIVE HUMIDITY (MAX. %) 93 95 98 95 94 88 87 92 98 96 94 92 94 RELATIVE HUMIDITY (MIN. %) 69 74 81 73 75 64 64 68 77 71 68 70 71 RELATIVE HUMIDITY (MEAN% 03UTC) 90 91 95 88 88 83 83 88 92 92 88 88 89 RELATIVE HUMIDITY (MEAN% 09UTC) 70 77 83 77 78 68 68 72 80 72 73 72 74 RELATIVE HUMIDITY (MEAN% 15UTC) 88 87 90 88 86 73 75 81 93 90 84 86 85 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 29.1 81.4 104.4 80.6 90.8 8.0 83.0 35.5 215.5 18.9 117.0 87.1 951.3 DAYS WITH PRECIPITATION >=10 1 4 4 2 2 0 2 1 7 0 2 3 28 DAYS WITH PRECIPITATION >= 5 3 5 6 4 2 0 5 2 10 1 3 6 47 DAYS WITH PRECIPITATION >= 1 5 10 15 7 5 3 9 6 18 5 5 7 95 DAYS WITH PRECIPITATION 6 14 18 10 11 3 9 7 21 7 6 9 121 GREATEST DAILY PRECIPITATION 13.0 19.0 25.0 33.0 66.0 4.0 34.0 15.0 59.0 8.0 58.0 25.0 66.0 DAY 31 25 10 1 26 4 23 16 20 23 2 6 DAY WITH THUNDER STORM 0 0 0 0 0 0 1 0 2 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 0 1 1 1 0 0 0 1 4 WIND DIRECTION (PREVAILING) *** *** 270 270 90 270 270 270 270 90 270 270 *** PREVAILING WIND SPEED(KNOTS) **** **** 7.6 8.9 7.7 9.5 10.0 9.7 10.0 7.6 9.0 9.5 **** PREVAILING WIND PERCENT ***** ***** 19.0 16.3 19.8 20.4 16.9 22.6 24.2 20.0 26.3 26.6 ***** CALMS PERCENT OF WIND ***** ***** 43.5 63.8 47.1 42.5 64.5 58.1 61.7 55.9 46.3 51.2 ***** NO. OF WIND OBSERVATION 0 114 248 240 242 240 248 248 240 245 240 248 2553 VECTOR WIND DIRECTION (MEAN) *** *** 312 308 350 318 298 293 275 334 298 277 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** 1.8 0.9 0.9 0.9 1.7 1.6 1.7 0.3 0.7 1.4 **** WIND STEADINESES (MEAN %) ***** ***** 50.0 32.1 22.5 19.6 56.7 44.4 47.2 8.6 15.6 34.1 ***** WIND SPEED (MEAN KNOTS) **** **** 3.6 2.8 4.0 4.6 3.0 3.6 3.6 3.5 4.5 4.1 **** FASTEST WIND DIRECTION *** *** 270 270 90 270 270 270 270 270 270 270 *** FASTEST WIND SPEED (KNOTS) *** *** 18 25 20 30 35 35 25 20 25 35 *** DAY ** ** 13 11 23 26 15 8 25 17 12 5 DAYS WITH SKY CLEAR (0-2)/8 10 3 1 4 9 12 8 11 6 9 6 3 82 DAYS WITH P.CLOUDY (3-6)/8 12 4 4 8 5 10 7 9 6 14 10 10 99 DAYS WITH CLOUDY (7-8)/8 9 22 26 18 17 8 16 11 18 8 14 18 185 DAYS WITH VISIBILITY =< 2 KM 4 0 1 2 4 1 4 0 4 1 3 0 24 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.5 1017.9 1017.6 1013.9 1013.5 1011.9 1009.0 1010.2 1014.3 1018.2 1018.1 1022.3 1015.5 MAX. QFE PRESSURE IN HPA 1029.2 1030.1 1027.8 1033.1 1020.1 1021.4 1016.7 1017.8 1028.7 1026.5 1038.3 1034.1 1038.3 DAY-HOUR 22- 3 26-15 14- 3 12-15 15- 6 11- 6 1-21 8-18 26- 6 25- 6 12- 6 18-15 MIN. QFE PRESSURE IN HPA 999.3 1003.1 1005.8 999.2 1003.2 996.6 998.5 999.9 1003.1 1009.7 999.6 999.3 996.6 DAY-HOUR 30-12 7-18 4- 9 26- 0 4- 0 26- 0 19-12 25-15 13- 0 10-18 8-15 5-12 MEAN QNH PRESSURE IN HPA 1015.8 1015.2 1014.9 1011.2 1010.8 1009.2 1006.3 1007.5 1011.6 1015.4 1015.4 1019.6 1012.8 MAX. QNH PRESSURE IN HPA 1026.5 1027.4 1025.1 1030.4 1017.4 1018.7 1014.0 1015.1 1026.0 1023.8 1035.6 1031.4 1035.6 DAY-HOUR 22- 3 26-15 14- 3 12-15 15- 6 11- 6 1-21 8-18 26- 6 25- 6 12- 6 18-15 MIN. QNH PRESSURE IN HPA 996.6 1000.4 1003.1 996.5 1000.5 993.9 995.8 997.2 1000.4 1007.0 996.9 996.6 993.9 DAY-HOUR 30-12 7-18 4- 9 26- 0 4- 0 26- 0 19-12 25-15 13- 0 10-18 8-15 5-12 MEAN QFF PRESSURE IN HPA ****** 1015.0 1015.1 1011.5 1011.1 1009.6 1006.7 1007.9 1012.0 1015.8 1015.7 1019.9 ****** MAX. QFF PRESSURE IN HPA ****** 1027.6 1025.3 1030.6 1017.7 1019.1 1014.4 1015.5 1026.3 1024.1 1035.8 1031.6 ****** DAY-HOUR **-** 26-15 14- 3 12-15 15- 6 11- 6 1-21 8-18 26- 6 25- 6 12- 6 18-18 MIN. QFF PRESSURE IN HPA ****** 1000.7 1003.4 996.9 1000.8 994.3 996.2 997.6 1000.8 1007.4 997.3 996.9 ****** DAY-HOUR **-** 7-18 4-12 26- 0 4- 0 26- 0 19-12 25-15 13- 3 10-18 8-15 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 1017.0 1013.4 1012.9 1011.5 1009.1 1010.2 1013.8 1018.0 1017.7 1022.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** 1026.8 1024.2 1018.2 1018.7 1016.0 1016.5 1025.5 1025.0 1032.6 1033.8 ****** DAY ** ** 14 1 15 12 29 29 29 25 13 19 MIN. QFE PRESSURE IN HPA ****** ****** 1006.6 999.2 1003.2 996.6 999.3 1000.3 1003.1 1010.1 1000.0 1001.5 ****** DAY ** ** 4 26 4 26 19 4 13 11 8 5 MEAN QNH PRESSURE IN HPA ****** ****** 1014.3 1010.7 1010.2 1008.9 1006.4 1007.5 1011.1 1015.2 1015.0 1019.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1024.1 1021.5 1015.5 1016.0 1013.3 1013.8 1022.8 1022.3 1029.9 1031.1 ****** DAY ** ** 14 1 15 12 29 29 29 25 13 19 MIN. QNH PRESSURE IN HPA ****** ****** 1003.9 996.5 1000.5 993.9 996.6 997.6 1000.4 1007.4 997.3 998.8 ****** DAY ** ** 4 26 4 26 19 4 13 11 8 5 MEAN QFF PRESSURE IN HPA ****** ****** 1014.6 1010.9 1010.5 1009.2 1006.8 1007.9 1011.4 1015.6 1015.3 1019.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1024.3 1021.7 1015.8 1016.3 1013.7 1014.2 1023.1 1022.6 1030.1 1031.3 ****** DAY ** ** 14 1 15 12 29 30 29 25 13 19 MIN. QFF PRESSURE IN HPA ****** ****** 1004.2 996.9 1000.8 994.3 997.0 998.0 1000.8 1007.8 997.7 999.1 ****** DAY ** ** 4 26 4 26 19 4 13 11 8 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1018.1 1017.5 1014.1 1013.7 1012.2 1009.5 1010.7 1014.4 1018.1 1018.5 1022.6 1015.7 MAX. QFE PRESSURE IN HPA 1029.2 1027.0 1027.8 1025.4 1019.2 1020.7 1016.0 1017.2 1026.6 1025.8 1034.6 1034.0 1034.6 DAY 22 18 14 1 15 11 2 29 26 25 12 19 MIN. QFE PRESSURE IN HPA 1004.0 1005.1 1006.9 1000.5 1005.4 999.8 999.6 1001.3 1003.1 1010.6 1000.1 1000.3 999.6 DAY 30 29 4 26 7 26 19 4 13 31 8 5 MEAN QNH PRESSURE IN HPA 1016.1 1015.4 1014.8 1011.4 1011.0 1009.5 1006.8 1008.0 1011.7 1015.4 1015.8 1019.8 1013.0 MAX. QNH PRESSURE IN HPA 1026.5 1024.3 1025.1 1022.7 1016.5 1018.0 1013.3 1014.5 1023.9 1023.1 1031.9 1031.3 1031.9 DAY 22 18 14 1 15 11 2 29 26 25 12 19 MIN. QNH PRESSURE IN HPA 1001.3 1002.4 1004.2 997.8 1002.7 997.1 996.9 998.6 1000.4 1007.9 997.4 997.6 996.9 DAY 30 29 4 26 7 26 19 4 13 31 8 5 MEAN QFF PRESSURE IN HPA 1016.1 1016.1 1015.0 1011.7 1011.1 1009.9 1007.2 1008.4 1012.1 1015.7 1016.1 1020.1 1013.3 MAX. QFF PRESSURE IN HPA 1026.7 1024.5 1025.3 1022.9 1016.8 1018.4 1013.7 1014.9 1024.2 1023.4 1032.1 1031.5 1032.1 DAY 22 18 14 1 15 11 2 29 26 25 12 19 MIN. QFF PRESSURE IN HPA 1001.6 1004.5 1004.5 998.2 1003.0 997.5 997.3 999.0 1000.8 1008.2 997.8 997.9 997.3 DAY 30 10 4 26 7 26 19 4 13 31 8 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.6 1018.9 1018.4 1014.7 1014.5 1012.6 1009.8 1011.2 1015.4 1019.0 1019.7 1023.5 1016.4 MAX. QFE PRESSURE IN HPA 1029.2 1029.2 1026.6 1027.5 1020.1 1021.4 1016.5 1017.6 1028.7 1026.5 1038.3 1034.0 1038.3 DAY 22 26 19 1 15 11 29 29 26 25 12 18 MIN. QFE PRESSURE IN HPA 1002.1 1007.2 1007.3 1002.8 1006.8 1002.8 999.7 1002.4 1003.2 1010.1 1001.3 1000.0 999.7 DAY 30 10 4 26 3 26 19 4 13 15 8 5 MEAN QNH PRESSURE IN HPA 1016.9 1016.2 1015.7 1012.0 1011.8 1009.9 1007.1 1008.5 1012.7 1016.3 1017.0 1020.8 1013.7 MAX. QNH PRESSURE IN HPA 1026.5 1026.5 1023.9 1024.8 1017.4 1018.7 1013.8 1014.9 1026.0 1023.8 1035.6 1031.3 1035.6 DAY 22 26 19 1 15 11 29 29 26 25 12 18 MIN. QNH PRESSURE IN HPA 999.4 1004.5 1004.6 1000.1 1004.1 1000.1 997.0 999.7 1000.5 1007.4 998.6 997.3 997.0 DAY 30 10 4 26 3 26 19 4 13 15 8 5 MEAN QFF PRESSURE IN HPA ****** 1015.6 1015.9 1012.3 1012.1 1010.3 1007.5 1009.0 1013.1 1016.6 1017.3 1021.0 ****** MAX. QFF PRESSURE IN HPA ****** 1025.9 1024.1 1025.0 1017.7 1019.1 1014.2 1015.3 1026.3 1024.1 1035.8 1031.5 ****** DAY ** 18 19 1 15 11 29 29 26 25 12 19 MIN. QFF PRESSURE IN HPA ****** 1004.8 1004.9 1000.5 1004.4 1000.5 997.5 1000.1 1000.9 1007.8 999.0 997.6 ****** DAY ** 10 4 26 3 26 19 4 13 15 8 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1018.7 1017.9 1014.4 1014.2 1012.5 1009.3 1010.8 1014.7 1018.4 1018.6 1022.4 1015.9 MAX. QFE PRESSURE IN HPA 1025.9 1029.8 1025.6 1027.0 1019.7 1020.6 1016.3 1017.4 1027.7 1025.7 1037.0 1033.1 1037.0 DAY 16 26 19 1 10 11 29 8 26 25 12 18 MIN. QFE PRESSURE IN HPA 999.8 1006.4 1005.8 1003.0 1005.5 1003.6 999.4 1001.9 1003.3 1010.4 1000.6 999.8 999.4 DAY 30 7 4 26 3 25 19 25 13 31 8 5 MEAN QNH PRESSURE IN HPA 1015.6 1016.0 1015.2 1011.7 1011.5 1009.8 1006.6 1008.1 1012.0 1015.7 1015.9 1019.7 1013.2 MAX. QNH PRESSURE IN HPA 1023.2 1027.1 1022.9 1024.3 1017.0 1017.9 1013.6 1014.7 1025.0 1023.0 1034.3 1030.4 1034.3 DAY 16 26 19 1 10 11 29 8 26 25 12 18 MIN. QNH PRESSURE IN HPA 997.1 1003.7 1003.1 1000.3 1002.8 1000.9 996.7 999.2 1000.6 1007.7 997.9 997.1 996.7 DAY 30 7 4 26 3 25 19 25 13 31 8 5 MEAN QFF PRESSURE IN HPA ****** ****** 1015.3 1012.0 1011.7 1010.2 1007.0 1008.5 1012.4 1016.1 1016.2 1020.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1023.1 1024.5 1017.3 1018.3 1014.0 1015.1 1025.3 1023.3 1034.5 1030.6 ****** DAY ** ** 19 1 10 11 29 8 26 25 12 18 MIN. QFF PRESSURE IN HPA ****** ****** 1003.4 1000.6 1003.1 1001.3 997.2 999.6 1001.0 1008.0 998.3 997.4 ****** DAY ** ** 4 26 3 25 19 25 13 31 8 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1018.0 1017.1 1013.3 1013.2 1011.8 1008.4 1009.7 1014.0 1017.7 1017.6 1021.4 1015.0 MAX. QFE PRESSURE IN HPA 1025.2 1030.0 1025.4 1025.5 1019.4 1020.1 1015.5 1017.5 1027.3 1025.3 1035.7 1033.2 1035.7 DAY 21 26 13 1 21 11 1 8 26 19 12 18 MIN. QFE PRESSURE IN HPA 999.3 1005.2 1005.8 1001.7 1005.0 1002.2 998.5 1000.2 1003.2 1010.2 1000.2 999.3 998.5 DAY 30 7 4 26 3 25 19 25 13 31 8 5 MEAN QNH PRESSURE IN HPA 1014.9 1015.3 1014.4 1010.6 1010.5 1009.1 1005.7 1007.0 1011.3 1015.0 1014.8 1018.7 1012.3 MAX. QNH PRESSURE IN HPA 1022.5 1027.3 1022.7 1022.8 1016.7 1017.4 1012.8 1014.8 1024.6 1022.6 1033.0 1030.5 1033.0 DAY 21 26 13 1 21 11 1 8 26 19 12 18 MIN. QNH PRESSURE IN HPA 996.6 1002.5 1003.1 999.0 1002.3 999.5 995.8 997.5 1000.5 1007.5 997.5 996.6 995.8 DAY 30 7 4 26 3 25 19 25 13 31 8 5 MEAN QFF PRESSURE IN HPA ****** ****** 1014.7 1010.9 1010.6 1009.4 1006.1 1007.4 1011.6 1015.3 1015.1 1019.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1022.9 1023.0 1016.8 1017.8 1013.2 1015.2 1024.9 1022.9 1033.2 1030.7 ****** DAY ** ** 13 1 15 11 1 8 26 19 12 18 MIN. QFF PRESSURE IN HPA ****** ****** 1003.4 999.3 1002.6 999.9 996.2 998.0 1000.9 1007.8 997.9 996.9 ****** DAY ** ** 4 26 3 25 19 25 13 31 8 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1018.2 1018.5 1017.6 1014.0 1012.8 1011.1 1008.0 1009.1 1013.9 1017.8 1017.8 1022.0 1015.1 MAX. QFE PRESSURE IN HPA 1028.0 1030.1 1026.7 1033.1 1019.5 1019.5 1015.1 1016.8 1026.4 1025.6 1035.5 1034.1 1035.5 DAY 21 26 13 12 21 11 29 8 26 19 12 18 MIN. QFE PRESSURE IN HPA 999.9 1003.6 1006.8 1002.0 1004.0 999.1 999.4 999.9 1003.2 1010.0 999.6 1003.3 999.1 DAY 30 7 4 25 2 25 19 25 14 10 8 9 MEAN QNH PRESSURE IN HPA 1015.4 1015.8 1014.9 1011.3 1010.1 1008.4 1005.3 1006.5 1011.2 1015.1 1015.1 1019.3 1012.4 MAX. QNH PRESSURE IN HPA 1025.3 1027.4 1024.0 1030.4 1016.8 1016.8 1012.4 1014.1 1023.7 1022.9 1032.8 1031.4 1032.8 DAY 21 26 13 12 21 11 29 8 26 19 12 18 MIN. QNH PRESSURE IN HPA 997.2 1000.9 1004.1 999.3 1001.3 996.4 996.7 997.2 1000.5 1007.3 996.9 1000.6 996.4 DAY 30 7 4 25 2 25 19 25 14 10 8 9 MEAN QFF PRESSURE IN HPA 1015.7 1016.1 1015.2 1011.6 1010.4 1008.8 1005.7 1006.9 1011.6 1015.4 1015.3 1019.5 1012.7 MAX. QFF PRESSURE IN HPA 1025.5 1027.6 1024.2 1030.6 1017.1 1017.2 1012.8 1014.5 1024.0 1023.2 1033.0 1031.6 1033.0 DAY 21 26 13 12 21 11 29 8 26 19 12 18 MIN. QFF PRESSURE IN HPA 997.5 1001.2 1004.4 999.7 1001.6 996.8 997.1 997.6 1000.9 1007.6 997.3 1000.9 996.8 DAY 30 7 4 25 2 25 19 25 14 10 8 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** 1016.6 1017.9 1014.1 1013.6 1011.6 1009.0 1010.0 1014.4 1018.3 1017.6 1022.3 ****** MAX. QFE PRESSURE IN HPA ****** 1027.4 1027.2 1024.2 1019.7 1019.9 1016.0 1017.8 1025.7 1025.7 1034.7 1034.1 ****** DAY ** 12 13 1 15 11 1 8 26 19 12 18 MIN. QFE PRESSURE IN HPA ****** 1003.1 1007.8 1000.4 1003.9 998.8 1001.0 1000.6 1003.2 1009.7 999.8 1003.5 ****** DAY ** 7 7 25 2 25 18 3 14 10 7 9 MEAN QNH PRESSURE IN HPA ****** 1013.9 1015.2 1011.4 1010.9 1008.9 1006.3 1007.3 1011.7 1015.6 1014.9 1019.6 ****** MAX. QNH PRESSURE IN HPA ****** 1024.7 1024.5 1021.5 1017.0 1017.2 1013.3 1015.1 1023.0 1023.0 1032.0 1031.4 ****** DAY ** 12 13 1 15 11 1 8 26 19 12 18 MIN. QNH PRESSURE IN HPA ****** 1000.4 1005.1 997.7 1001.2 996.1 998.3 997.9 1000.5 1007.0 997.1 1000.8 ****** DAY ** 7 7 25 2 25 18 3 14 10 7 9 MEAN QFF PRESSURE IN HPA ****** 1014.2 1015.5 1011.7 1011.2 1009.3 1006.7 1007.7 1012.1 1016.0 1015.2 1019.9 ****** MAX. QFF PRESSURE IN HPA ****** 1024.9 1024.7 1021.7 1017.3 1017.6 1013.7 1015.5 1023.3 1023.3 1032.2 1031.6 ****** DAY ** 12 13 1 15 11 1 8 26 19 12 18 MIN. QFF PRESSURE IN HPA ****** 1000.7 1005.4 998.1 1001.5 996.5 998.7 998.3 1000.9 1007.4 997.5 1001.1 ****** DAY ** 7 7 25 3 25 18 3 14 10 7 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 1017.5 1013.6 1013.4 1011.8 1009.1 1010.1 1014.3 1018.2 1017.8 1022.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** 1026.6 1024.2 1019.0 1020.0 1016.7 1016.5 1025.8 1024.6 1032.2 1033.9 ****** DAY ** ** 13 15 15 11 1 29 28 19 12 18 MIN. QFE PRESSURE IN HPA ****** ****** 1007.1 999.4 1003.9 996.9 1000.6 1000.4 1003.3 1010.2 1000.0 1003.5 ****** DAY ** ** 7 25 2 25 18 3 14 10 7 4 MEAN QNH PRESSURE IN HPA ****** ****** 1014.8 1010.9 1010.7 1009.1 1006.4 1007.4 1011.6 1015.5 1015.1 1019.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1023.9 1021.5 1016.3 1017.3 1014.0 1013.8 1023.1 1021.9 1029.5 1031.2 ****** DAY ** ** 13 15 15 11 1 29 28 19 12 18 MIN. QNH PRESSURE IN HPA ****** ****** 1004.4 996.7 1001.2 994.2 997.9 997.7 1000.6 1007.5 997.3 1000.8 ****** DAY ** ** 7 25 2 25 18 3 14 10 7 4 MEAN QFF PRESSURE IN HPA ****** ****** 1015.0 1011.2 1011.0 1009.4 1006.8 1007.8 1011.9 1015.8 1015.4 1019.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1024.1 1021.8 1016.6 1017.7 1014.4 1014.2 1023.4 1022.2 1029.7 1031.4 ****** DAY ** ** 13 15 15 11 1 29 28 25 12 18 MIN. QFF PRESSURE IN HPA ****** ****** 1004.7 997.1 1001.5 994.6 998.3 998.1 1001.0 1007.9 997.7 1001.1 ****** DAY ** ** 7 25 2 25 18 3 14 10 7 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.5 7.1 8.8 13.0 19.4 21.7 24.8 25.8 26.0 18.9 13.2 10.4 16.2 MINIMUN AIR TEMPERATURE (C) 2.9 4.7 6.1 9.4 15.3 18.3 21.1 21.5 21.2 15.0 9.9 6.6 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 7 23 19 23 2 0 0 75 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 1 1 0 0 0 0 0 0 0 1 0 3 TEMPERATURE RECORDS LOWEST(C) 1.0 0.0 0.0 4.0 11.0 12.0 17.0 16.0 19.0 6.0 -1.0 1.0 -1.0 DAY 5 6 30 3 3 6 5 16 21 19 22 30 MAXIMUM AIR TEMPERATURE (C) 9.1 10.5 11.8 16.9 24.4 26.0 29.2 29.6 29.0 21.9 16.2 14.2 19.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 4 15 13 5 0 0 0 38 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 14.0 17.0 22.0 26.0 30.0 32.0 33.0 35.0 31.0 28.0 21.0 24.0 35.0 DAY 14 24 17 21 9 29 31 2 13 1 2 16 DIF. BETWEEN (MAX.-MIN.) (C) 6.2 5.8 5.7 7.5 9.1 7.7 8.1 8.1 7.8 6.9 6.3 7.6 7.2 MEAN DAILY TEMP. (MDT) (C) 6.0 7.6 8.9 13.2 19.8 22.1 25.2 25.5 25.1 18.4 13.1 10.4 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 13.0 60.5 129.0 118.5 123.5 18.0 0.0 0.0 462.5 HEATING DEG. DAYS(BASE 18 0C) 371.0 291.5 281.5 147.0 13.5 10.5 0.0 0.0 0.0 36.0 148.0 236.0 1535.0 DEWPOINT (MEAN C) 2.6 4.9 6.5 9.5 15.6 18.7 20.4 22.1 21.4 15.6 10.3 6.6 12.8 MIXING RATIO (G/KG) 4.56 5.38 6.05 7.50 11.21 13.77 15.33 17.01 16.09 11.28 7.98 6.16 10.19 VAPOUR PRESSURE (HPA) 7.42 8.74 9.79 12.10 17.89 21.93 24.26 26.89 25.64 18.20 12.96 10.01 16.32 SATURATION DEF. (HPA) 1.72 1.49 1.77 3.36 5.21 4.79 7.56 6.94 8.26 4.30 2.62 2.97 4.25 RELATIVE HUMIDITY (MEAN %) 82 86 87 80 79 84 77 81 77 83 84 78 82 RELATIVE HUMIDITY (MAX. %) 93 95 96 91 90 93 89 90 88 94 96 92 92 RELATIVE HUMIDITY (MIN. %) 67 73 75 67 65 72 65 69 69 73 72 67 70 RELATIVE HUMIDITY (MEAN% 03UTC) 89 92 89 87 83 91 85 88 87 92 92 84 88 RELATIVE HUMIDITY (MEAN% 09UTC) 70 76 82 72 71 76 68 75 71 76 76 70 74 RELATIVE HUMIDITY (MEAN% 15UTC) 84 90 89 79 79 81 75 80 80 90 92 89 84 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 15.0 53.1 117.6 35.6 50.1 166.4 32.2 104.1 4.6 605.8 324.4 96.0 1604.9 DAYS WITH PRECIPITATION >=10 0 1 3 0 2 9 1 5 0 10 7 2 40 DAYS WITH PRECIPITATION >= 5 1 5 8 4 4 10 1 6 0 12 8 4 63 DAYS WITH PRECIPITATION >= 1 6 7 17 8 8 12 3 7 2 15 11 6 102 DAYS WITH PRECIPITATION 6 9 17 9 11 14 7 7 4 16 12 6 118 GREATEST DAILY PRECIPITATION 6.0 28.0 24.0 9.0 17.0 36.0 27.0 41.1 3.0 200.0 97.0 56.0 200.0 DAY 20 5 11 22 29 5 4 9 21 10 16 21 DAY WITH THUNDER STORM 1 0 2 0 3 1 1 1 3 2 0 0 14 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 1 2 1 0 0 0 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 360 360 360 360 45 360 90 360 360 90 225 225 360 PREVAILING WIND SPEED(KNOTS) 6.2 6.8 7.3 7.8 5.2 6.3 5.5 7.7 9.2 6.6 4.4 3.8 7.2 PREVAILING WIND PERCENT 29.4 29.0 31.0 18.8 17.3 17.1 17.3 19.2 22.5 18.1 19.3 15.5 19.8 CALMS PERCENT OF WIND 37.5 38.8 31.5 49.8 37.1 43.3 24.2 17.0 12.6 14.8 21.3 19.4 30.9 NO. OF WIND OBSERVATION 248 224 248 239 248 240 248 182 151 155 150 155 2488 VECTOR WIND DIRECTION (MEAN) 323 332 313 350 54 11 61 320 20 341 287 329 347 VECTOR WIND MAGNITUDE(KNOTS) 2.3 2.2 3.3 1.6 1.8 1.2 1.3 1.0 3.1 1.5 1.1 0.7 1.4 WIND STEADINESES (MEAN %) 47.9 43.1 52.4 39.0 52.9 42.9 31.7 18.2 43.7 22.1 23.4 15.6 28.6 WIND SPEED (MEAN KNOTS) 4.8 5.1 6.3 4.1 3.4 2.8 4.1 5.5 7.1 6.8 4.7 4.5 4.9 FASTEST WIND DIRECTION 270 90 270 270 340 360 180 270 300 180 270 340 270 FASTEST WIND SPEED (KNOTS) 30 20 30 26 15 15 18 22 18 28 25 20 30 DAY 19 12 5 21 11 6 5 29 21 17 4 26 DAYS WITH SKY CLEAR (0-2)/8 5 5 3 8 6 8 7 13 9 6 7 8 85 DAYS WITH P.CLOUDY (3-6)/8 9 6 8 5 17 9 18 7 18 14 6 10 127 DAYS WITH CLOUDY (7-8)/8 17 17 20 17 8 13 6 7 3 11 17 13 149 DAYS WITH VISIBILITY =< 2 KM 0 6 4 3 1 4 0 1 0 1 3 1 24 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1019.9 1019.5 1016.9 1017.0 1011.5 1013.4 1009.8 1011.6 1017.5 1023.7 1024.9 1023.9 1017.5 MAX. QFE PRESSURE IN HPA 1031.9 1029.0 1031.0 1026.6 1020.6 1021.8 1023.5 1020.8 1022.8 1037.4 1045.9 1039.9 1045.9 DAY-HOUR 23- 6 7- 3 29-12 5- 6 29- 6 5- 6 5- 6 31- 6 10- 6 12- 9 14-12 22- 9 MIN. QFE PRESSURE IN HPA 1002.3 1002.5 1001.1 1007.6 1003.7 1005.6 997.2 1003.0 1009.9 1010.9 1014.9 1007.4 997.2 DAY-HOUR 19- 6 26-18 17-12 9-12 25-21 29- 0 2-21 7- 0 28-15 22-15 28-12 19-12 MEAN QNH PRESSURE IN HPA 1017.2 1016.7 1014.2 1014.3 1008.8 1010.7 1007.1 1008.9 1014.7 1020.9 1022.1 1021.2 1014.7 MAX. QNH PRESSURE IN HPA 1029.2 1026.3 1028.3 1023.9 1017.9 1019.1 1020.8 1018.1 1020.1 1034.7 1043.1 1037.1 1043.1 DAY-HOUR 23- 6 7- 3 29-12 5- 6 29- 6 5- 6 5- 6 31- 6 10- 6 12- 9 14-12 22- 9 MIN. QNH PRESSURE IN HPA 999.6 999.8 998.4 1004.9 1001.0 1002.9 994.5 1000.3 1007.2 1008.2 1012.2 1004.7 994.5 DAY-HOUR 19- 6 26-18 17-12 9-12 25-21 29- 0 2-21 7- 0 28-15 22-15 28-12 19-12 MEAN QFF PRESSURE IN HPA 1017.4 1017.0 1014.5 1014.5 1009.2 1011.1 1007.5 1008.4 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1029.4 1026.5 1028.5 1024.1 1018.2 1019.4 1021.2 1017.1 ****** ****** ****** ****** ****** DAY-HOUR 23- 6 7- 3 29-12 5- 6 29- 6 5- 6 5- 6 31-15 **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 999.9 1000.1 998.7 1005.2 1001.4 1003.3 995.0 1000.8 ****** ****** ****** ****** ****** DAY-HOUR 19- 6 26-18 17-12 9-12 26- 0 29- 0 2-21 7- 0 **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1020.0 1019.2 1016.3 1016.4 1010.9 1013.0 1009.4 1009.5 ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 1029.0 1028.8 1026.0 1026.3 1017.5 1020.0 1022.6 1015.1 ****** ****** ****** ****** ****** DAY 4 7 29 5 29 5 5 11 ** ** ** ** MIN. QFE PRESSURE IN HPA 1005.0 1004.5 1004.0 1008.0 1003.7 1005.6 999.4 1003.0 ****** ****** ****** ****** ****** DAY 19 27 17 9 26 29 3 7 ** ** ** ** MEAN QNH PRESSURE IN HPA 1017.3 1016.4 1013.6 1013.7 1008.2 1010.3 1006.7 1006.8 ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1026.3 1026.1 1023.3 1023.6 1014.8 1017.3 1019.9 1012.4 ****** ****** ****** ****** ****** DAY 4 7 29 5 29 5 5 11 ** ** ** ** MIN. QNH PRESSURE IN HPA 1002.3 1001.8 1001.3 1005.3 1001.0 1002.9 996.7 1000.3 ****** ****** ****** ****** ****** DAY 19 27 17 9 26 29 3 7 ** ** ** ** MEAN QFF PRESSURE IN HPA 1017.5 1016.7 1013.9 1014.0 1008.5 1010.7 1007.1 1007.2 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.5 1026.3 1023.5 1023.8 1015.1 1017.6 1020.2 1012.8 ****** ****** ****** ****** ****** DAY 4 7 29 5 29 5 5 11 ** ** ** ** MIN. QFF PRESSURE IN HPA 1002.6 1002.1 1001.6 1005.6 1001.4 1003.3 997.1 1000.8 ****** ****** ****** ****** ****** DAY 19 27 17 9 26 29 3 7 ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1019.3 1016.7 1016.9 1011.5 1013.5 1010.1 1012.1 1017.6 1023.6 1024.6 1023.8 1017.5 MAX. QFE PRESSURE IN HPA 1029.9 1029.0 1028.0 1026.5 1019.4 1020.5 1023.2 1019.3 1022.8 1035.5 1036.9 1036.7 1036.9 DAY 23 7 29 5 29 5 5 31 21 13 24 22 MIN. QFE PRESSURE IN HPA 1003.7 1005.2 1003.9 1007.7 1003.9 1006.6 1000.7 1003.9 1011.0 1014.7 1016.7 1008.8 1000.7 DAY 19 27 17 9 7 28 12 7 29 23 14 19 MEAN QNH PRESSURE IN HPA 1017.4 1016.6 1014.0 1014.1 1008.8 1010.8 1007.4 1009.4 1014.9 1020.9 1021.9 1021.1 1014.8 MAX. QNH PRESSURE IN HPA 1027.2 1026.3 1025.3 1023.8 1016.7 1017.8 1020.5 1016.6 1020.1 1032.8 1034.2 1034.0 1034.2 DAY 23 7 29 5 29 5 5 31 21 13 24 22 MIN. QNH PRESSURE IN HPA 1001.0 1002.5 1001.2 1005.0 1001.2 1003.9 998.0 1001.2 1008.3 1012.0 1014.0 1006.1 998.0 DAY 19 27 17 9 7 28 12 7 29 23 14 19 MEAN QFF PRESSURE IN HPA 1017.6 1016.8 1014.2 1014.4 1009.1 1011.1 1007.8 1009.8 1015.3 1021.2 1022.2 1021.3 1015.1 MAX. QFF PRESSURE IN HPA 1027.4 1026.5 1025.5 1024.0 1017.0 1018.1 1020.8 1017.0 1020.5 1033.0 1034.4 1034.2 1034.4 DAY 23 7 29 5 29 5 5 31 21 13 24 22 MIN. QFF PRESSURE IN HPA 1001.3 1002.8 1001.5 1005.3 1001.6 1004.3 998.4 1001.6 1008.7 1012.3 1014.3 1006.4 998.4 DAY 19 27 17 9 7 28 12 7 29 23 14 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1020.9 1020.2 1017.9 1017.7 1012.2 1013.8 1010.6 1013.0 1018.3 1024.3 1025.5 1024.7 1018.3 MAX. QFE PRESSURE IN HPA 1031.9 1028.9 1029.8 1026.6 1020.6 1021.8 1023.5 1020.8 1022.8 1037.1 1038.8 1038.0 1038.8 DAY 23 7 29 5 29 5 5 31 10 12 21 22 MIN. QFE PRESSURE IN HPA 1002.3 1006.6 1003.3 1008.0 1004.5 1006.5 1001.6 1004.5 1012.4 1014.9 1017.4 1008.8 1001.6 DAY 19 26 17 9 7 29 12 8 29 22 14 19 MEAN QNH PRESSURE IN HPA 1018.2 1017.5 1015.1 1015.0 1009.5 1011.1 1007.9 1010.3 1015.6 1021.6 1022.8 1022.0 1015.5 MAX. QNH PRESSURE IN HPA 1029.2 1026.2 1027.1 1023.9 1017.9 1019.1 1020.8 1018.1 1020.1 1034.4 1036.1 1035.3 1036.1 DAY 23 7 29 5 29 5 5 31 10 12 21 22 MIN. QNH PRESSURE IN HPA 999.6 1003.9 1000.6 1005.3 1001.8 1003.8 998.9 1001.8 1009.7 1012.2 1014.7 1006.1 998.9 DAY 19 26 17 9 7 29 12 8 29 22 14 19 MEAN QFF PRESSURE IN HPA 1018.4 1017.7 1015.4 1015.3 1009.8 1011.5 1008.3 1008.4 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1029.4 1026.4 1027.3 1024.1 1018.2 1019.4 1021.2 1015.3 ****** ****** ****** ****** ****** DAY 23 7 29 5 29 5 5 11 ** ** ** ** MIN. QFF PRESSURE IN HPA 999.9 1004.2 1000.9 1005.6 1002.2 1004.2 999.3 1002.2 ****** ****** ****** ****** ****** DAY 19 26 17 9 7 29 12 8 ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1019.6 1017.6 1017.6 1012.1 1013.8 1010.4 1012.7 1018.0 1023.9 1024.7 1024.2 1017.8 MAX. QFE PRESSURE IN HPA 1030.1 1027.8 1030.9 1026.0 1020.1 1021.2 1023.5 1020.3 1021.7 1037.4 1039.0 1039.9 1039.9 DAY 23 3 29 22 29 5 5 31 15 12 21 22 MIN. QFE PRESSURE IN HPA 1002.7 1007.0 1001.9 1008.1 1004.5 1006.6 1001.1 1004.5 1012.7 1013.2 1016.7 1008.3 1001.1 DAY 19 26 17 9 7 28 12 8 28 22 14 19 MEAN QNH PRESSURE IN HPA 1017.0 1016.9 1014.8 1014.8 1009.4 1011.1 1007.7 1010.0 1015.3 1021.1 1021.9 1021.5 1015.1 MAX. QNH PRESSURE IN HPA 1027.4 1025.1 1028.2 1023.3 1017.4 1018.5 1020.8 1017.6 1019.0 1034.7 1036.2 1037.1 1037.1 DAY 23 3 29 22 29 5 5 31 15 12 21 22 MIN. QNH PRESSURE IN HPA 1000.0 1004.3 999.2 1005.4 1001.8 1003.9 998.4 1001.8 1010.0 1010.5 1014.0 1005.6 998.4 DAY 19 26 17 9 7 28 12 8 28 22 14 19 MEAN QFF PRESSURE IN HPA 1017.2 1017.1 1015.1 1015.0 1009.8 1011.5 1008.1 1008.2 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.6 1025.3 1028.4 1023.6 1017.7 1018.8 1021.1 1016.9 ****** ****** ****** ****** ****** DAY 23 7 29 22 29 5 5 11 ** ** ** ** MIN. QFF PRESSURE IN HPA 1000.3 1004.6 999.5 1005.7 1002.2 1004.3 998.8 1002.2 ****** ****** ****** ****** ****** DAY 19 26 17 9 7 28 12 8 ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1019.1 1019.0 1016.5 1016.9 1011.5 1013.4 1009.7 1011.9 1017.0 1023.3 1025.1 1023.3 1017.2 MAX. QFE PRESSURE IN HPA 1029.9 1028.1 1031.0 1025.6 1019.8 1020.2 1022.2 1019.7 1020.7 1037.4 1045.9 1036.8 1045.9 DAY 23 3 29 22 11 5 5 30 9 12 14 17 MIN. QFE PRESSURE IN HPA 1005.0 1004.4 1001.1 1007.6 1004.3 1006.5 999.6 1004.8 1011.0 1011.4 1014.9 1007.4 999.6 DAY 18 26 17 9 25 28 2 7 28 22 28 19 MEAN QNH PRESSURE IN HPA 1016.4 1016.3 1013.8 1014.2 1008.8 1010.7 1007.0 1009.2 1014.3 1020.5 1022.4 1020.6 1014.5 MAX. QNH PRESSURE IN HPA 1027.2 1025.4 1028.3 1022.9 1017.1 1017.5 1019.5 1017.0 1018.0 1034.7 1043.1 1034.1 1043.1 DAY 23 3 29 22 11 5 5 30 9 12 14 17 MIN. QNH PRESSURE IN HPA 1002.3 1001.7 998.4 1004.9 1001.6 1003.8 996.9 1002.1 1008.3 1008.7 1012.2 1004.7 996.9 DAY 18 26 17 9 25 28 2 7 28 22 28 19 MEAN QFF PRESSURE IN HPA 1016.6 1016.5 1014.1 1014.5 1009.1 1011.0 1007.4 1007.3 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.4 1025.6 1028.5 1023.2 1017.4 1017.8 1019.8 1014.2 ****** ****** ****** ****** ****** DAY 23 3 29 22 11 5 5 11 ** ** ** ** MIN. QFF PRESSURE IN HPA 1002.5 1002.0 998.7 1005.2 1002.0 1004.2 997.3 1002.5 ****** ****** ****** ****** ****** DAY 18 26 17 9 25 28 2 7 ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1019.5 1016.7 1016.5 1011.1 1012.9 1009.0 1011.7 1016.7 1023.4 1024.5 1023.6 1017.1 MAX. QFE PRESSURE IN HPA 1030.3 1028.5 1031.0 1025.7 1019.1 1020.0 1021.2 1019.4 1020.7 1037.4 1039.2 1037.0 1039.2 DAY 23 3 29 22 11 5 5 31 9 12 23 21 MIN. QFE PRESSURE IN HPA 1004.4 1004.5 1002.0 1007.7 1004.0 1005.7 998.5 1003.4 1009.9 1010.9 1014.9 1007.5 998.5 DAY 18 26 17 9 25 28 2 7 28 22 28 19 MEAN QNH PRESSURE IN HPA 1017.0 1016.8 1014.0 1013.8 1008.4 1010.2 1006.3 1009.0 1014.0 1020.6 1021.8 1020.8 1014.4 MAX. QNH PRESSURE IN HPA 1027.6 1025.8 1028.3 1023.0 1016.4 1017.3 1018.5 1016.7 1018.0 1034.7 1036.4 1034.3 1036.4 DAY 23 3 29 22 11 5 5 31 9 12 23 21 MIN. QNH PRESSURE IN HPA 1001.7 1001.8 999.3 1005.0 1001.3 1003.0 995.8 1000.7 1007.2 1008.2 1012.2 1004.8 995.8 DAY 18 26 17 9 25 28 2 7 28 22 28 19 MEAN QFF PRESSURE IN HPA 1017.2 1017.1 1014.2 1014.1 1008.8 1010.6 1006.7 1009.2 1014.4 1021.0 1022.1 1021.1 1014.7 MAX. QFF PRESSURE IN HPA 1027.8 1026.0 1028.5 1023.3 1016.8 1017.6 1018.8 1017.1 1018.4 1034.9 1036.7 1034.5 1036.7 DAY 23 3 29 22 11 5 5 31 9 12 23 21 MIN. QFF PRESSURE IN HPA 1001.9 1002.1 999.6 1005.3 1001.7 1003.4 996.2 1001.1 1007.6 1008.5 1012.5 1005.1 996.2 DAY 18 26 17 9 25 28 2 7 28 22 28 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1020.0 1019.7 1016.9 1017.3 1011.8 1013.6 1009.6 1010.1 ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 1029.8 1028.8 1030.2 1026.2 1019.2 1020.8 1021.3 1016.4 ****** ****** ****** ****** ****** DAY 23 5 29 4 11 4 5 11 ** ** ** ** MIN. QFE PRESSURE IN HPA 1004.1 1002.5 1004.4 1008.5 1004.3 1006.0 998.3 1003.3 ****** ****** ****** ****** ****** DAY 18 26 17 9 25 28 2 6 ** ** ** ** MEAN QNH PRESSURE IN HPA 1017.3 1016.9 1014.2 1014.6 1009.1 1010.9 1006.9 1007.4 ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.1 1026.1 1027.5 1023.5 1016.5 1018.1 1018.6 1013.7 ****** ****** ****** ****** ****** DAY 23 5 29 4 11 4 5 11 ** ** ** ** MIN. QNH PRESSURE IN HPA 1001.4 999.8 1001.7 1005.8 1001.6 1003.3 995.6 1000.6 ****** ****** ****** ****** ****** DAY 18 26 17 9 25 28 2 6 ** ** ** ** MEAN QFF PRESSURE IN HPA 1017.5 1017.2 1014.5 1014.9 1009.4 1011.2 1007.3 1007.8 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.3 1026.3 1027.7 1023.8 1016.9 1018.4 1019.0 1014.1 ****** ****** ****** ****** ****** DAY 23 5 29 22 11 4 5 11 ** ** ** ** MIN. QFF PRESSURE IN HPA 1001.7 1000.1 1002.0 1006.1 1002.0 1003.7 996.0 1001.1 ****** ****** ****** ****** ****** DAY 18 26 17 9 25 28 2 6 ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1019.4 1017.0 1016.6 1011.3 1013.3 1009.5 1010.1 ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 1029.0 1028.1 1028.9 1026.3 1018.5 1020.5 1021.4 1015.3 ****** ****** ****** ****** ****** DAY 3 6 29 4 11 4 5 15 ** ** ** ** MIN. QFE PRESSURE IN HPA 1005.3 1003.5 1005.0 1008.4 1003.7 1005.9 997.2 1003.1 ****** ****** ****** ****** ****** DAY 18 26 16 9 25 28 2 6 ** ** ** ** MEAN QNH PRESSURE IN HPA 1017.0 1016.7 1014.3 1013.9 1008.6 1010.6 1006.8 1007.4 ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1026.3 1025.4 1026.2 1023.6 1015.8 1017.8 1018.7 1012.6 ****** ****** ****** ****** ****** DAY 3 6 29 4 11 4 5 15 ** ** ** ** MIN. QNH PRESSURE IN HPA 1002.6 1000.8 1002.3 1005.7 1001.0 1003.2 994.5 1000.4 ****** ****** ****** ****** ****** DAY 18 26 16 9 25 28 2 6 ** ** ** ** MEAN QFF PRESSURE IN HPA 1017.3 1016.9 1014.5 1014.2 1008.9 1011.0 1007.2 1007.8 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.5 1025.6 1026.4 1023.8 1016.1 1018.1 1019.1 1013.0 ****** ****** ****** ****** ****** DAY 3 6 29 4 11 19 5 15 ** ** ** ** MIN. QFF PRESSURE IN HPA 1002.9 1001.1 1002.6 1006.0 1001.4 1003.6 995.0 1000.9 ****** ****** ****** ****** ****** DAY 18 26 16 9 25 28 2 6 ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.9 9.7 11.7 13.2 20.5 23.4 25.2 25.8 22.7 18.1 11.5 10.2 16.8 MINIMUN AIR TEMPERATURE (C) 7.1 5.3 9.5 11.4 15.8 19.1 20.8 21.3 19.2 14.5 7.2 6.1 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 8 19 24 8 0 0 0 59 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) 2.0 -1.0 6.0 8.0 11.0 16.0 17.0 18.0 15.0 8.0 1.0 1.0 -1.0 DAY 31 1 16 6 13 15 14 6 25 29 24 13 MAXIMUM AIR TEMPERATURE (C) 13.3 13.1 14.3 15.5 23.2 25.9 27.7 28.5 25.3 21.0 14.9 13.6 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 0 0 2 4 5 1 1 0 0 14 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 21.0 31.0 22.0 28.0 30.0 31.0 31.0 30.0 30.0 19.0 20.0 31.0 DAY 9 21 14 26 26 5 26 12 2 17 5 8 DIF. BETWEEN (MAX.-MIN.) (C) 6.2 7.8 4.8 4.1 7.4 6.8 6.9 7.2 6.1 6.5 7.7 7.5 6.6 MEAN DAILY TEMP. (MDT) (C) 10.2 9.2 11.9 13.4 19.5 22.5 24.2 24.9 22.2 17.8 11.0 9.8 16.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 13.5 51.0 101.0 120.5 46.5 0.5 0.0 0.0 333.0 HEATING DEG. DAYS(BASE 18 0C) 235.0 247.5 191.5 137.5 11.0 0.0 0.0 0.0 0.5 31.0 208.5 253.5 1316.0 DEWPOINT (MEAN C) 6.8 5.5 9.3 10.7 16.7 19.7 20.9 21.5 19.7 15.2 7.9 7.2 13.4 MIXING RATIO (G/KG) 6.12 5.68 7.30 8.04 12.02 14.52 15.72 16.25 14.48 10.86 6.62 6.37 10.33 VAPOUR PRESSURE (HPA) 9.96 9.26 11.81 12.99 19.30 23.08 24.92 25.80 23.12 17.56 10.84 10.36 16.58 SATURATION DEF. (HPA) 2.37 3.09 2.14 2.33 5.23 6.11 7.50 7.65 4.84 3.61 3.01 2.27 4.18 RELATIVE HUMIDITY (MEAN %) 82 77 86 85 80 80 78 78 84 84 80 83 81 RELATIVE HUMIDITY (MAX. %) 92 89 96 94 89 89 87 89 94 94 92 94 92 RELATIVE HUMIDITY (MIN. %) 72 66 78 78 72 71 70 70 75 76 70 71 72 RELATIVE HUMIDITY (MEAN% 03UTC) 86 84 92 92 87 85 85 88 93 91 88 87 88 RELATIVE HUMIDITY (MEAN% 09UTC) 79 72 84 82 77 77 77 74 78 80 71 77 77 RELATIVE HUMIDITY (MEAN% 15UTC) 88 82 87 87 79 81 78 80 87 89 89 90 85 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 46.6 41.7 42.7 43.6 18.0 172.6 40.0 72.4 244.1 142.0 212.5 82.0 1158.2 DAYS WITH PRECIPITATION >=10 1 1 1 2 1 4 2 2 6 2 5 2 29 DAYS WITH PRECIPITATION >= 5 3 1 4 3 2 6 3 3 9 6 7 4 51 DAYS WITH PRECIPITATION >= 1 8 4 12 8 3 11 4 8 12 13 11 7 101 DAYS WITH PRECIPITATION 11 6 19 10 3 11 4 9 13 13 12 10 121 GREATEST DAILY PRECIPITATION 22.0 35.0 10.0 18.0 10.0 78.0 16.0 46.0 66.0 69.0 57.0 38.0 78.0 DAY 15 4 6 18 4 21 13 25 18 1 21 9 DAY WITH THUNDER STORM 0 0 0 0 0 1 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 315 90 90 90 90 90 360 360 270 315 90 90 90 PREVAILING WIND SPEED(KNOTS) 10.4 6.6 8.6 8.0 7.3 6.8 8.0 9.7 4.3 7.6 4.5 6.5 6.7 PREVAILING WIND PERCENT 19.1 27.9 29.0 30.7 28.4 40.0 29.7 17.4 19.3 16.2 18.7 17.4 22.0 CALMS PERCENT OF WIND 17.1 14.3 12.3 8.0 11.0 8.7 9.0 5.8 11.3 13.0 16.0 21.9 12.4 NO. OF WIND OBSERVATION 152 140 155 150 155 150 155 155 150 154 150 155 1821 VECTOR WIND DIRECTION (MEAN) 336 70 58 43 41 57 3 350 323 337 317 360 20 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.6 3.4 2.8 3.6 2.3 2.9 2.8 1.6 2.2 0.5 1.1 1.8 WIND STEADINESES (MEAN %) 26.8 30.8 45.3 35.9 54.5 37.7 51.8 46.7 33.3 43.1 13.2 26.2 31.6 WIND SPEED (MEAN KNOTS) 5.6 5.2 7.5 7.8 6.6 6.1 5.6 6.0 4.8 5.1 3.8 4.2 5.7 FASTEST WIND DIRECTION 330 330 360 320 340 320 350 340 340 340 350 360 340 FASTEST WIND SPEED (KNOTS) 30 23 30 35 30 19 20 25 17 38 20 15 38 DAY 31 6 24 20 19 19 28 17 2 28 7 9 DAYS WITH SKY CLEAR (0-2)/8 3 13 1 2 10 8 9 9 4 4 5 6 74 DAYS WITH P.CLOUDY (3-6)/8 8 6 6 3 13 8 8 9 7 9 11 7 95 DAYS WITH CLOUDY (7-8)/8 20 9 24 25 8 14 14 13 19 18 14 18 196 DAYS WITH VISIBILITY =< 2 KM 0 2 8 5 2 3 5 1 8 2 1 3 40 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1022.2 1024.5 1018.4 1019.1 1019.3 1013.1 1011.6 1013.8 1017.2 1023.7 1030.3 1023.2 1019.7 MAX. QFE PRESSURE IN HPA 1032.8 1035.3 1033.7 1030.0 1029.4 1022.4 1023.1 1023.9 1026.6 1036.2 1042.6 1038.5 1042.6 DAY-HOUR 14- 6 13- 3 1- 6 24- 6 13- 3 12-12 15- 6 4- 6 24- 6 31-15 22- 6 5- 6 MIN. QFE PRESSURE IN HPA 1003.9 1003.4 999.1 996.7 1008.0 1002.3 1003.0 1005.0 1003.4 1010.2 1012.9 1005.9 996.7 DAY-HOUR 30-12 13-15 14-12 20- 3 2-15 18-15 2-15 16-15 1-15 17-12 28- 3 8-15 MEAN QNH PRESSURE IN HPA 1019.5 1021.8 1015.7 1016.4 1016.6 1010.4 1008.9 1011.1 1014.4 1021.0 1027.5 1020.5 1017.0 MAX. QNH PRESSURE IN HPA 1030.1 1032.6 1031.0 1027.3 1026.7 1019.7 1020.4 1021.2 1023.9 1033.5 1039.8 1035.8 1039.8 DAY-HOUR 14- 6 13- 3 1- 6 24- 6 13- 3 12-12 15- 6 4- 6 24- 6 31-15 22- 6 5- 6 MIN. QNH PRESSURE IN HPA 1001.2 1000.7 996.4 994.0 1005.3 999.6 1000.3 1002.3 1000.7 1007.5 1010.2 1003.2 994.0 DAY-HOUR 30-12 13-15 14-12 20- 3 2-15 18-15 2-15 16-15 1-15 17-12 28- 3 8-15 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 1022.3 1025.0 1018.9 1019.1 1019.3 1013.4 1011.7 1014.2 1017.0 1023.7 1030.1 1023.5 1019.8 MAX. QFE PRESSURE IN HPA 1032.1 1035.3 1033.0 1029.0 1029.4 1020.2 1022.0 1022.8 1025.6 1034.4 1042.1 1037.2 1042.1 DAY 14 13 1 27 13 13 15 4 24 31 22 5 MIN. QFE PRESSURE IN HPA 1006.7 1012.6 1005.8 996.7 1011.3 1004.3 1004.0 1008.2 1006.7 1012.1 1012.9 1011.1 996.7 DAY 30 22 14 20 26 8 3 12 1 17 28 8 MEAN QNH PRESSURE IN HPA 1019.6 1022.2 1016.1 1016.3 1016.5 1010.7 1009.0 1011.5 1014.3 1020.9 1027.4 1020.8 1017.1 MAX. QNH PRESSURE IN HPA 1029.4 1032.6 1030.3 1026.3 1026.7 1017.5 1019.3 1020.1 1022.9 1031.7 1039.3 1034.5 1039.3 DAY 14 13 1 27 13 13 15 4 24 31 22 5 MIN. QNH PRESSURE IN HPA 1004.0 1009.9 1003.1 994.0 1008.6 1001.6 1001.3 1005.5 1004.0 1009.4 1010.2 1008.4 994.0 DAY 30 22 14 20 26 8 3 12 1 17 28 8 MEAN QFF PRESSURE IN HPA 1019.7 1022.5 1016.4 1016.6 1016.9 1011.1 1009.4 1011.9 1014.7 1021.3 1027.6 1021.0 1017.4 MAX. QFF PRESSURE IN HPA 1029.6 1032.8 1030.5 1026.6 1027.0 1017.8 1019.7 1020.4 1023.2 1031.9 1039.5 1034.7 1039.5 DAY 14 13 1 27 13 13 15 4 24 31 22 5 MIN. QFF PRESSURE IN HPA 1004.3 1010.2 1003.4 994.3 1009.0 1002.0 1001.7 1005.9 1004.4 1009.7 1010.5 1008.7 994.3 DAY 30 22 14 20 26 8 10 12 1 17 28 8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1023.1 1025.5 1019.4 1019.7 1019.8 1013.6 1012.4 1014.8 1018.1 1024.5 1031.2 1024.3 1020.5 MAX. QFE PRESSURE IN HPA 1032.8 1035.0 1033.7 1030.0 1029.4 1020.4 1023.1 1023.9 1026.6 1036.0 1042.6 1038.5 1042.6 DAY 14 13 1 24 13 13 15 4 24 31 22 5 MIN. QFE PRESSURE IN HPA 1006.0 1012.6 1004.7 1001.3 1011.8 1005.2 1004.4 1008.7 1006.7 1012.3 1017.0 1010.8 1001.3 DAY 30 22 14 20 2 30 10 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1020.4 1022.7 1016.7 1016.9 1017.1 1010.9 1009.7 1012.1 1015.4 1021.7 1028.5 1021.6 1017.8 MAX. QNH PRESSURE IN HPA 1030.1 1032.3 1031.0 1027.3 1026.7 1017.7 1020.4 1021.2 1023.9 1033.3 1039.8 1035.8 1039.8 DAY 14 13 1 24 13 13 15 4 24 31 22 5 MIN. QNH PRESSURE IN HPA 1003.3 1009.9 1002.0 998.6 1009.1 1002.5 1001.7 1006.0 1004.0 1009.6 1014.3 1008.1 998.6 DAY 30 22 14 20 2 30 10 16 1 17 27 8 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 1022.4 1025.2 1018.9 1019.3 1019.9 1013.5 1012.1 1014.4 1017.3 1024.0 1030.7 1023.3 1020.1 MAX. QFE PRESSURE IN HPA 1031.9 1034.8 1032.7 1029.4 1029.4 1021.2 1023.0 1022.6 1026.2 1035.9 1041.6 1037.1 1041.6 DAY 14 13 27 23 13 12 15 4 24 31 22 5 MIN. QFE PRESSURE IN HPA 1006.0 1012.0 1002.1 1005.0 1010.7 1004.0 1004.1 1007.9 1006.1 1011.7 1015.5 1008.5 1002.1 DAY 30 22 14 11 26 8 9 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1019.7 1022.5 1016.2 1016.6 1017.2 1010.8 1009.4 1011.7 1014.6 1021.3 1028.0 1020.6 1017.4 MAX. QNH PRESSURE IN HPA 1029.2 1032.1 1030.0 1026.7 1026.7 1018.5 1020.3 1019.9 1023.5 1033.2 1038.8 1034.4 1038.8 DAY 14 13 27 23 13 12 15 4 24 31 22 5 MIN. QNH PRESSURE IN HPA 1003.3 1009.3 999.4 1002.3 1008.0 1001.3 1001.4 1005.2 1003.4 1009.0 1012.8 1005.8 999.4 DAY 30 22 14 11 26 8 9 16 1 17 27 8 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 1021.4 1024.0 1017.5 1018.7 1019.1 1012.8 1011.1 1013.1 1016.9 1023.2 1029.6 1022.3 1019.1 MAX. QFE PRESSURE IN HPA 1030.7 1033.9 1031.8 1028.7 1028.1 1022.4 1021.5 1022.1 1026.0 1035.4 1040.6 1038.0 1040.6 DAY 12 28 27 23 22 12 15 4 16 31 21 5 MIN. QFE PRESSURE IN HPA 1003.9 1010.5 999.1 1003.8 1009.2 1003.4 1003.5 1006.4 1004.0 1010.2 1014.5 1007.2 999.1 DAY 30 22 14 11 2 8 2 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1018.6 1021.2 1014.8 1016.0 1016.4 1010.1 1008.4 1010.4 1014.2 1020.4 1026.8 1019.6 1016.4 MAX. QNH PRESSURE IN HPA 1028.0 1031.2 1029.1 1026.0 1025.4 1019.7 1018.8 1019.4 1023.3 1032.7 1037.8 1035.3 1037.8 DAY 12 28 27 23 22 12 15 4 16 31 21 5 MIN. QNH PRESSURE IN HPA 1001.2 1007.8 996.4 1001.1 1006.5 1000.7 1000.8 1003.7 1001.3 1007.5 1011.8 1004.5 996.4 DAY 30 22 14 11 2 8 2 16 1 17 27 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1022.0 1023.0 1017.5 1018.9 1018.4 1012.2 1010.6 1012.5 1016.5 1023.2 1029.7 1022.6 1018.9 MAX. QFE PRESSURE IN HPA 1031.5 1033.9 1031.6 1029.1 1027.6 1021.4 1021.0 1020.6 1024.9 1036.2 1041.7 1035.2 1041.7 DAY 12 12 27 23 22 12 15 4 19 31 21 5 MIN. QFE PRESSURE IN HPA 1004.5 1003.4 999.2 1006.3 1008.0 1002.3 1003.0 1005.0 1003.4 1010.2 1013.8 1005.9 999.2 DAY 30 13 14 11 2 18 2 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1019.3 1020.2 1014.8 1016.2 1015.7 1009.5 1007.9 1009.8 1013.8 1020.4 1027.0 1019.8 1016.2 MAX. QNH PRESSURE IN HPA 1028.8 1031.2 1028.9 1026.4 1024.9 1018.7 1018.3 1017.9 1022.2 1033.5 1038.9 1032.5 1038.9 DAY 12 12 27 23 22 12 15 4 19 31 21 5 MIN. QNH PRESSURE IN HPA 1001.8 1000.7 996.5 1003.6 1005.3 999.6 1000.3 1002.3 1000.7 1007.5 1011.1 1003.2 996.5 DAY 30 13 14 11 2 18 2 16 1 17 27 8 MEAN QFF PRESSURE IN HPA 1019.5 1020.5 1015.1 1016.5 1016.0 1009.9 1008.3 1010.2 1014.2 1020.8 1027.2 1020.1 1016.5 MAX. QFF PRESSURE IN HPA 1029.0 1031.4 1029.1 1026.6 1025.2 1019.0 1018.7 1018.3 1022.5 1033.7 1039.1 1032.7 1039.1 DAY 12 12 27 23 22 12 15 24 19 31 21 5 MIN. QFF PRESSURE IN HPA 1002.1 1001.0 996.9 1003.9 1005.6 1000.0 1000.7 1002.7 1001.1 1007.9 1011.3 1003.5 996.9 DAY 30 13 14 11 2 18 2 16 1 17 27 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 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.7 5.5 7.7 13.6 19.4 22.6 26.4 25.7 21.9 17.1 11.9 8.3 15.7 MINIMUN AIR TEMPERATURE (C) 4.3 1.7 5.0 9.9 15.0 18.2 20.7 21.1 18.5 14.2 8.4 4.6 11.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 16 24 2 0 0 0 46 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 9 2 0 0 0 0 0 0 0 0 3 14 TEMPERATURE RECORDS LOWEST(C) 1.0 -2.0 -1.0 5.0 7.0 14.0 18.0 18.0 15.0 11.0 2.0 -1.0 -2.0 DAY 3 11 9 2 4 3 3 26 29 9 26 15 MAXIMUM AIR TEMPERATURE (C) 11.8 8.5 9.8 16.6 22.1 25.3 29.1 28.7 24.8 20.0 15.0 11.1 18.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 12 11 2 0 0 0 25 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.0 17.0 14.0 24.0 27.0 29.0 32.0 32.0 31.0 25.0 19.0 19.0 32.0 DAY 17 24 28 14 9 24 19 5 2 25 3 6 DIF. BETWEEN (MAX.-MIN.) (C) 7.5 6.8 4.8 6.7 7.1 7.1 8.4 7.6 6.3 5.8 6.6 6.5 6.8 MEAN DAILY TEMP. (MDT) (C) 8.0 5.1 7.4 13.3 18.5 21.7 24.9 24.9 21.6 17.1 11.7 7.8 15.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 38.5 121.5 121.0 31.0 0.5 0.0 0.0 313.0 HEATING DEG. DAYS(BASE 18 0C) 309.0 362.0 327.5 142.0 24.0 1.5 0.0 0.0 0.0 38.0 188.5 315.0 1707.5 DEWPOINT (MEAN C) 5.9 2.2 4.8 11.7 16.1 18.8 22.1 23.1 20.4 14.8 9.0 5.4 12.9 MIXING RATIO (G/KG) 5.84 4.50 5.44 8.65 11.63 13.80 17.11 18.20 15.19 10.51 7.23 5.75 10.32 VAPOUR PRESSURE (HPA) 9.49 7.34 8.88 13.98 18.63 22.03 27.05 28.71 24.18 16.97 11.80 9.41 16.54 SATURATION DEF. (HPA) 1.92 1.89 1.68 1.92 4.25 5.68 7.64 4.76 2.40 2.72 2.49 1.70 3.26 RELATIVE HUMIDITY (MEAN %) 84 82 84 89 82 80 79 87 92 87 83 86 85 RELATIVE HUMIDITY (MAX. %) 94 94 93 97 94 90 88 95 99 97 95 97 94 RELATIVE HUMIDITY (MIN. %) 72 71 71 82 71 72 68 77 85 78 71 70 74 RELATIVE HUMIDITY (MEAN% 03UTC) 88 92 92 96 93 88 85 92 97 96 93 92 92 RELATIVE HUMIDITY (MEAN% 09UTC) 80 77 81 86 80 78 77 84 88 81 77 81 81 RELATIVE HUMIDITY (MEAN% 15UTC) 91 87 81 90 81 80 80 85 94 92 90 90 87 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 106.0 157.0 106.3 34.0 38.2 51.0 12.0 57.0 174.3 341.9 139.9 86.8 1304.4 DAYS WITH PRECIPITATION >=10 5 9 4 2 0 1 0 2 4 8 4 3 42 DAYS WITH PRECIPITATION >= 5 6 10 8 3 3 5 0 4 9 10 6 5 69 DAYS WITH PRECIPITATION >= 1 8 16 12 4 11 9 5 12 14 16 12 7 126 DAYS WITH PRECIPITATION 8 16 13 4 14 9 5 12 14 19 15 8 137 GREATEST DAILY PRECIPITATION 27.0 26.0 33.0 14.0 9.0 18.0 4.0 16.0 62.0 80.3 48.0 40.0 80.3 DAY 20 2 16 6 25 18 23 11 20 7 26 14 DAY WITH THUNDER STORM 0 0 0 0 2 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 5 0 0 0 0 0 0 0 0 0 2 7 DAYS WITH DUST 0 0 0 0 2 0 0 1 1 1 0 0 5 WIND DIRECTION (PREVAILING) 90 315 90 90 90 360 45 315 270 90 315 315 90 PREVAILING WIND SPEED(KNOTS) 5.8 10.5 6.8 6.6 5.9 7.3 5.2 7.4 4.8 5.2 8.5 7.8 5.9 PREVAILING WIND PERCENT 20.0 32.9 22.4 24.7 31.6 22.0 20.6 20.0 17.2 20.6 24.7 21.2 18.4 CALMS PERCENT OF WIND 26.5 21.4 17.3 13.3 11.6 12.0 11.0 8.4 6.0 7.7 4.7 5.1 12.0 NO. OF WIND OBSERVATION 155 140 156 150 155 150 155 155 151 155 150 156 1828 VECTOR WIND DIRECTION (MEAN) 344 335 27 35 40 14 9 333 325 353 306 291 355 VECTOR WIND MAGNITUDE(KNOTS) 0.6 3.3 1.7 2.2 2.8 2.8 3.3 2.4 1.9 1.0 1.9 1.3 1.8 WIND STEADINESES (MEAN %) 14.0 51.6 33.3 44.0 53.8 52.8 56.9 47.1 35.8 19.6 38.8 28.3 34.6 WIND SPEED (MEAN KNOTS) 4.3 6.4 5.1 5.0 5.2 5.3 5.8 5.1 5.3 5.1 4.9 4.6 5.2 FASTEST WIND DIRECTION 320 330 320 340 310 320 340 320 60 320 310 270 320 FASTEST WIND SPEED (KNOTS) 18 30 38 28 28 25 23 18 18 30 18 24 38 DAY 21 20 11 2 2 9 2 1 20 7 17 12 DAYS WITH SKY CLEAR (0-2)/8 8 5 3 7 4 8 14 11 4 3 3 6 76 DAYS WITH P.CLOUDY (3-6)/8 10 8 5 3 13 7 11 6 4 6 6 5 84 DAYS WITH CLOUDY (7-8)/8 13 15 23 19 14 15 6 14 22 22 21 19 203 DAYS WITH VISIBILITY =< 2 KM 5 4 5 8 1 1 0 2 8 4 1 2 41 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1020.9 1022.3 1024.9 1019.9 1016.1 1015.5 1010.9 1011.0 1014.8 1022.1 1027.1 1027.8 1019.4 MAX. QFE PRESSURE IN HPA 1034.4 1034.5 1034.7 1031.8 1026.7 1027.8 1025.0 1019.3 1025.4 1037.8 1037.1 1043.7 1043.7 DAY-HOUR 2- 9 10-15 14-15 3- 6 3- 6 21- 6 16- 9 24- 3 28- 3 26- 6 30-15 14- 6 MIN. QFE PRESSURE IN HPA 1007.4 1004.5 1013.8 1005.6 1003.4 1005.4 1000.9 1004.1 1000.3 1005.7 1016.3 1012.1 1000.3 DAY-HOUR 31-15 2-12 28-12 4-15 19- 3 16-15 5- 9 9- 3 2-12 12- 9 5-15 29-12 MEAN QNH PRESSURE IN HPA 1018.2 1019.6 1022.2 1017.2 1013.4 1012.8 1008.2 1008.3 1012.1 1019.4 1024.3 1025.0 1016.7 MAX. QNH PRESSURE IN HPA 1031.7 1031.8 1032.0 1029.1 1024.0 1025.1 1022.3 1016.6 1022.7 1035.1 1034.4 1040.9 1040.9 DAY-HOUR 2- 9 10-15 14-15 3- 6 3- 6 21- 6 16- 9 24- 3 28- 3 26- 6 30-15 14- 6 MIN. QNH PRESSURE IN HPA 1004.7 1001.8 1011.1 1002.9 1000.7 1002.7 998.2 1001.4 997.6 1003.0 1013.6 1009.4 997.6 DAY-HOUR 31-15 2-12 28-12 4-15 19- 3 16-15 5- 9 9- 3 2-12 12- 9 5-15 29-12 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 1021.0 1022.7 1025.0 1020.0 1016.2 1015.7 1010.9 1011.4 1015.4 1022.2 1026.8 1027.7 1019.6 MAX. QFE PRESSURE IN HPA 1031.3 1033.7 1032.7 1031.3 1026.1 1022.9 1015.6 1019.3 1025.4 1035.5 1034.4 1043.1 1043.1 DAY 21 14 20 3 3 21 14 24 28 26 22 14 MIN. QFE PRESSURE IN HPA 1011.8 1010.0 1014.9 1010.0 1003.4 1010.6 1007.6 1004.1 1005.6 1006.8 1016.9 1014.8 1003.4 DAY 31 20 1 5 19 16 21 9 2 12 6 6 MEAN QNH PRESSURE IN HPA 1018.3 1020.0 1022.3 1017.3 1013.5 1013.0 1008.3 1008.7 1012.7 1019.5 1024.0 1025.0 1016.9 MAX. QNH PRESSURE IN HPA 1028.6 1031.0 1030.0 1028.6 1023.4 1020.2 1012.9 1016.6 1022.7 1032.8 1031.7 1040.3 1040.3 DAY 21 14 20 3 3 21 14 24 28 26 22 14 MIN. QNH PRESSURE IN HPA 1009.1 1007.3 1012.2 1007.3 1000.7 1007.9 1004.9 1001.4 1002.9 1004.1 1014.2 1012.1 1000.7 DAY 31 20 1 5 19 16 21 9 2 12 6 6 MEAN QFF PRESSURE IN HPA 1018.5 1020.2 1022.5 1017.6 1013.8 1013.3 1008.6 1009.1 1013.1 1019.8 1024.3 1025.2 1017.2 MAX. QFF PRESSURE IN HPA 1028.8 1031.1 1030.2 1028.8 1023.6 1020.5 1013.3 1017.0 1023.0 1033.1 1031.9 1040.5 1040.5 DAY 21 14 20 3 3 21 14 24 28 26 22 14 MIN. QFF PRESSURE IN HPA 1009.4 1007.5 1012.4 1007.6 1001.1 1008.3 1005.3 1001.8 1003.3 1004.4 1014.5 1012.3 1001.1 DAY 31 20 1 5 19 28 21 9 2 12 6 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1022.0 1022.5 1025.9 1020.9 1016.9 1016.2 1011.2 1011.7 1016.1 1022.9 1027.8 1028.7 1020.2 MAX. QFE PRESSURE IN HPA 1033.6 1033.5 1034.5 1031.8 1026.7 1027.8 1016.7 1019.2 1024.8 1037.8 1035.4 1043.7 1043.7 DAY 5 14 14 3 3 21 14 24 24 26 29 14 MIN. QFE PRESSURE IN HPA 1012.2 1008.9 1015.8 1011.2 1003.8 1009.4 1002.2 1005.5 1005.5 1007.1 1018.1 1016.1 1002.2 DAY 31 2 1 24 19 1 5 9 2 12 6 6 MEAN QNH PRESSURE IN HPA 1019.3 1019.8 1023.2 1018.2 1014.2 1013.5 1008.5 1009.0 1013.4 1020.2 1025.1 1026.0 1017.5 MAX. QNH PRESSURE IN HPA 1030.9 1030.8 1031.8 1029.1 1024.0 1025.1 1014.0 1016.5 1022.1 1035.1 1032.7 1040.9 1040.9 DAY 5 14 14 3 3 21 14 24 24 26 29 14 MIN. QNH PRESSURE IN HPA 1009.5 1006.2 1013.1 1008.5 1001.1 1006.7 999.5 1002.8 1002.8 1004.4 1015.4 1013.4 999.5 DAY 31 2 1 24 19 1 5 9 2 12 6 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1021.1 1023.3 1025.3 1020.6 1016.5 1015.9 1011.4 1011.3 1015.2 1022.2 1027.2 1027.9 1019.8 MAX. QFE PRESSURE IN HPA 1034.4 1033.5 1034.5 1030.4 1026.0 1023.1 1025.0 1018.8 1024.3 1037.2 1035.4 1042.1 1042.1 DAY 2 13 20 3 3 7 16 24 24 26 29 14 MIN. QFE PRESSURE IN HPA 1011.9 1013.0 1015.9 1009.8 1003.9 1008.2 1000.9 1005.5 1004.5 1005.7 1018.0 1014.8 1000.9 DAY 18 20 1 4 19 1 5 9 2 12 5 20 MEAN QNH PRESSURE IN HPA 1018.4 1020.6 1022.6 1017.9 1013.8 1013.2 1008.7 1008.6 1012.5 1019.5 1024.4 1025.2 1017.1 MAX. QNH PRESSURE IN HPA 1031.7 1030.8 1031.8 1027.7 1023.3 1020.4 1022.3 1016.1 1021.6 1034.5 1032.7 1039.3 1039.3 DAY 2 13 20 3 3 7 16 24 24 26 29 14 MIN. QNH PRESSURE IN HPA 1009.2 1010.3 1013.2 1007.1 1001.2 1005.5 998.2 1002.8 1001.8 1003.0 1015.3 1012.1 998.2 DAY 18 20 1 4 19 1 5 9 2 12 5 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1020.3 1020.9 1024.4 1019.3 1015.4 1015.1 1010.5 1010.5 1013.6 1021.3 1026.7 1026.7 1018.7 MAX. QFE PRESSURE IN HPA 1032.8 1033.3 1034.0 1029.0 1025.1 1023.1 1015.3 1017.6 1022.9 1035.5 1034.0 1041.1 1041.1 DAY 2 10 14 8 3 7 14 24 27 26 29 14 MIN. QFE PRESSURE IN HPA 1008.0 1004.5 1013.8 1006.7 1003.7 1006.9 1006.5 1004.6 1000.3 1007.1 1016.4 1012.1 1000.3 DAY 31 2 28 24 19 16 25 5 2 12 5 29 MEAN QNH PRESSURE IN HPA 1017.6 1018.2 1021.7 1016.6 1012.7 1012.4 1007.8 1007.8 1010.9 1018.6 1023.9 1024.0 1016.0 MAX. QNH PRESSURE IN HPA 1030.1 1030.6 1031.3 1026.3 1022.4 1020.4 1012.6 1014.9 1020.2 1032.8 1031.3 1038.3 1038.3 DAY 2 10 14 8 3 7 14 24 27 26 29 14 MIN. QNH PRESSURE IN HPA 1005.3 1001.8 1011.1 1004.0 1001.0 1004.2 1003.8 1001.9 997.6 1004.4 1013.7 1009.4 997.6 DAY 31 2 28 24 19 16 25 5 2 12 5 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1020.3 1022.1 1024.5 1018.7 1015.4 1014.6 1010.3 1010.3 1013.8 1021.8 1027.1 1027.6 1018.9 MAX. QFE PRESSURE IN HPA 1030.8 1034.5 1034.7 1029.4 1026.1 1022.1 1022.2 1017.6 1023.2 1034.7 1037.1 1040.5 1040.5 DAY 2 10 14 27 2 7 1 24 27 26 30 13 MIN. QFE PRESSURE IN HPA 1007.4 1009.9 1014.5 1005.6 1004.5 1005.4 1005.9 1004.5 1003.2 1009.4 1016.3 1015.6 1003.2 DAY 31 19 17 4 19 16 25 9 2 13 5 5 MEAN QNH PRESSURE IN HPA 1017.6 1019.4 1021.8 1016.0 1012.7 1011.9 1007.6 1007.6 1011.1 1019.0 1024.4 1024.9 1016.2 MAX. QNH PRESSURE IN HPA 1028.1 1031.8 1032.0 1026.7 1023.4 1019.4 1019.5 1014.9 1020.5 1032.0 1034.4 1037.7 1037.7 DAY 2 10 14 27 2 7 1 24 27 26 30 13 MIN. QNH PRESSURE IN HPA 1004.7 1007.2 1011.8 1002.9 1001.8 1002.7 1003.2 1001.8 1000.5 1006.7 1013.6 1012.9 1000.5 DAY 31 19 17 4 19 16 25 9 2 13 5 5 MEAN QFF PRESSURE IN HPA 1017.8 1019.6 1022.0 1016.3 1013.1 1012.3 1008.0 1008.0 1011.5 1019.4 1024.6 1025.1 1016.5 MAX. QFF PRESSURE IN HPA 1028.3 1031.9 1032.2 1026.9 1023.7 1019.7 1019.9 1015.3 1020.8 1032.3 1034.6 1037.9 1037.9 DAY 2 10 14 27 2 7 1 24 27 26 30 13 MIN. QFF PRESSURE IN HPA 1005.0 1007.4 1012.0 1003.2 1002.2 1003.1 1003.6 1002.2 1000.9 1007.0 1013.9 1013.1 1000.9 DAY 31 19 17 4 19 16 25 9 2 13 5 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.1 8.6 7.5 13.6 18.5 23.4 25.5 25.4 23.3 20.2 15.1 11.6 16.8 MINIMUN AIR TEMPERATURE (C) 5.3 5.1 3.9 10.3 14.6 19.7 20.6 21.9 20.1 15.5 10.8 7.2 12.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 11 18 28 12 0 0 0 69 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 2 3 0 0 0 0 0 0 0 0 0 6 TEMPERATURE RECORDS LOWEST(C) 0.0 -1.0 -1.0 4.0 9.0 15.0 18.0 19.0 16.0 12.0 7.0 4.0 -1.0 DAY 29 11 10 16 19 9 16 1 30 15 12 28 MAXIMUM AIR TEMPERATURE (C) 12.4 11.9 10.5 16.6 20.9 25.9 27.9 28.1 25.6 23.0 18.3 14.8 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 0 3 10 4 0 0 0 0 18 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.0 23.0 23.0 31.0 26.0 30.0 31.0 31.0 29.0 26.0 24.0 20.0 31.0 DAY 14 19 31 25 28 15 30 6 9 1 19 1 DIF. BETWEEN (MAX.-MIN.) (C) 7.1 6.8 6.6 6.3 6.3 6.2 7.3 6.2 5.5 7.5 7.5 7.6 6.8 MEAN DAILY TEMP. (MDT) (C) 8.8 8.5 7.2 13.5 17.7 22.8 24.3 25.0 22.8 19.3 14.5 11.0 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.5 5.5 60.5 102.0 123.0 61.0 2.0 0.0 0.0 356.5 HEATING DEG. DAYS(BASE 18 0C) 284.0 275.5 336.0 109.0 33.0 0.0 0.0 0.0 0.0 3.0 106.0 216.5 1363.0 DEWPOINT (MEAN C) 6.6 6.1 4.5 10.0 15.7 19.9 20.7 21.5 20.6 16.7 11.9 9.1 13.6 MIXING RATIO (G/KG) 6.06 5.88 5.24 7.79 11.22 14.80 15.55 16.31 15.36 11.86 8.77 7.11 10.50 VAPOUR PRESSURE (HPA) 9.85 9.57 8.54 12.58 18.05 23.54 24.68 25.83 24.52 19.11 14.22 11.60 16.84 SATURATION DEF. (HPA) 1.88 1.84 2.10 3.64 3.61 5.70 8.21 6.91 4.50 4.74 3.19 2.25 4.05 RELATIVE HUMIDITY (MEAN %) 85 85 82 80 84 82 76 80 85 81 83 85 82 RELATIVE HUMIDITY (MAX. %) 93 94 92 91 93 91 86 89 94 92 93 95 92 RELATIVE HUMIDITY (MIN. %) 75 77 74 72 77 73 66 72 78 72 72 74 74 RELATIVE HUMIDITY (MEAN% 03UTC) 91 92 91 90 91 87 85 87 94 90 90 93 90 RELATIVE HUMIDITY (MEAN% 09UTC) 82 81 78 77 83 80 71 77 81 76 75 76 78 RELATIVE HUMIDITY (MEAN% 15UTC) 89 88 82 80 82 81 75 81 86 87 89 91 84 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.1 52.8 179.8 53.5 36.9 45.5 33.3 58.1 485.9 137.7 144.6 72.4 1342.6 DAYS WITH PRECIPITATION >=10 1 1 7 2 1 1 2 2 6 3 3 2 31 DAYS WITH PRECIPITATION >= 5 4 3 10 3 1 2 2 5 7 5 7 4 53 DAYS WITH PRECIPITATION >= 1 8 7 14 12 2 10 4 10 11 7 9 7 101 DAYS WITH PRECIPITATION 12 9 16 19 6 15 6 15 14 11 10 10 143 GREATEST DAILY PRECIPITATION 12.0 30.0 43.0 20.0 33.0 17.2 15.0 18.0 260.0 91.0 71.0 40.5 260.0 DAY 28 4 8 7 18 5 7 25 17 22 25 2 DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 1 0 0 0 2 DAYS WITH SNOW OR SLEET 0 0 3 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 3 2 3 1 1 0 0 0 0 0 0 0 10 WIND DIRECTION (PREVAILING) 90 90 90 90 90 90 90 360 360 225 225 225 90 PREVAILING WIND SPEED(KNOTS) 6.1 6.2 8.0 5.7 6.5 5.7 5.9 8.0 6.1 2.9 3.4 3.3 6.0 PREVAILING WIND PERCENT 24.5 22.1 23.9 28.7 46.5 20.7 21.3 23.2 18.0 21.9 26.7 22.6 21.7 CALMS PERCENT OF WIND 6.5 6.9 0.6 5.3 5.8 4.7 5.8 1.3 4.0 3.2 5.3 11.0 5.0 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 73 22 32 3 53 5 350 338 355 337 279 275 4 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.2 1.2 2.2 3.1 2.4 3.4 2.6 1.3 1.5 0.9 0.4 1.5 WIND STEADINESES (MEAN %) 17.0 20.3 18.5 36.7 52.5 45.3 51.5 49.1 31.0 31.3 21.4 10.3 28.3 WIND SPEED (MEAN KNOTS) 4.7 5.9 6.5 6.0 5.9 5.3 6.6 5.3 4.2 4.8 4.2 3.9 5.3 FASTEST WIND DIRECTION 350 330 310 170 320 350 310 340 320 310 200 310 330 FASTEST WIND SPEED (KNOTS) 20 30 25 23 20 16 30 16 15 25 16 17 30 DAY 16 21 9 1 23 13 13 6 9 21 14 2 DAYS WITH SKY CLEAR (0-2)/8 9 4 8 2 10 12 14 4 4 15 10 6 98 DAYS WITH P.CLOUDY (3-6)/8 10 10 5 11 8 7 8 9 11 9 10 17 115 DAYS WITH CLOUDY (7-8)/8 12 15 18 17 13 11 9 18 15 7 10 8 153 DAYS WITH VISIBILITY =< 2 KM 4 4 0 1 0 0 0 0 1 0 0 0 10 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1022.5 1022.9 1023.8 1019.9 1019.6 1014.1 1012.4 1011.5 1017.9 1021.7 1023.4 1026.4 1019.7 MAX. QFE PRESSURE IN HPA 1032.5 1035.7 1040.0 1044.0 1031.1 1024.9 1021.1 1039.1 1025.6 1028.1 1035.2 1031.9 1044.0 DAY-HOUR 28- 3 7- 9 19-15 7- 9 5- 9 7- 6 25- 3 27-12 19- 6 22- 6 26- 6 4- 3 MIN. QFE PRESSURE IN HPA 1010.6 1009.6 1000.0 1005.3 1006.5 1002.4 1004.5 1002.3 1007.9 1013.3 1005.1 1012.3 1000.0 DAY-HOUR 23-12 21- 3 2- 9 1-12 30-15 20-15 5-12 23-15 9-12 10-12 19-12 29-12 MEAN QNH PRESSURE IN HPA 1019.8 1020.1 1021.1 1017.1 1016.9 1011.4 1009.7 1008.8 1015.2 1019.0 1020.6 1023.7 1016.9 MAX. QNH PRESSURE IN HPA 1029.8 1033.0 1037.2 1041.2 1028.4 1022.2 1018.4 1036.3 1022.9 1025.4 1032.5 1029.2 1041.2 DAY-HOUR 28- 3 7- 9 19-15 7- 9 5- 9 7- 6 25- 3 27-12 19- 6 22- 6 26- 6 4- 3 MIN. QNH PRESSURE IN HPA 1007.9 1006.9 997.3 1002.6 1003.8 999.7 1001.8 999.6 1005.2 1010.6 1002.4 1009.6 997.3 DAY-HOUR 23-12 21- 3 2- 9 1-12 30-15 20-15 5-12 23-15 9-12 10-12 19-12 29-12 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 1022.8 1022.8 1024.0 1019.2 1019.7 1014.5 1012.9 1011.7 1018.0 1021.6 1023.3 1026.2 1019.7 MAX. QFE PRESSURE IN HPA 1032.5 1033.8 1038.3 1042.3 1029.6 1024.5 1021.1 1019.6 1024.5 1028.1 1034.8 1031.9 1042.3 DAY 28 7 19 7 5 7 25 14 19 31 26 4 MIN. QFE PRESSURE IN HPA 1012.5 1009.6 1009.1 1007.9 1007.6 1008.2 1006.4 1003.3 1010.7 1014.2 1006.6 1016.3 1003.3 DAY 23 21 2 1 30 30 6 24 4 21 19 29 MEAN QNH PRESSURE IN HPA 1020.0 1020.1 1021.3 1016.5 1017.0 1011.8 1010.2 1009.0 1015.3 1018.9 1020.6 1023.4 1017.0 MAX. QNH PRESSURE IN HPA 1029.8 1031.1 1035.6 1039.5 1026.9 1021.8 1018.4 1016.9 1021.8 1025.4 1032.1 1029.2 1039.5 DAY 28 7 19 7 5 7 25 14 19 31 26 4 MIN. QNH PRESSURE IN HPA 1009.8 1006.9 1006.4 1005.2 1004.9 1005.5 1003.7 1000.6 1008.0 1011.5 1003.9 1013.6 1000.6 DAY 23 21 2 1 30 30 6 24 4 21 19 29 MEAN QFF PRESSURE IN HPA 1020.3 1020.4 1021.5 1015.2 1017.3 1012.2 1010.6 1009.4 1015.7 1019.2 1020.9 1023.7 1017.2 MAX. QFF PRESSURE IN HPA 1030.0 1031.3 1035.7 1036.9 1027.2 1022.1 1018.8 1017.3 1022.1 1025.7 1032.3 1029.4 1036.9 DAY 28 7 19 8 5 7 25 14 19 31 26 4 MIN. QFF PRESSURE IN HPA 1010.1 1007.2 1006.7 1005.5 1005.3 1005.9 1004.1 1001.0 1008.4 1011.8 1004.2 1013.8 1001.0 DAY 23 21 2 1 30 30 6 24 4 21 19 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1023.6 1023.5 1024.7 1020.4 1020.4 1014.8 1012.8 1012.2 1018.7 1022.3 1024.1 1027.4 1020.4 MAX. QFE PRESSURE IN HPA 1032.4 1035.6 1039.5 1043.7 1029.2 1024.9 1017.4 1019.9 1025.6 1028.1 1035.2 1031.9 1043.7 DAY 26 7 19 7 5 7 9 14 19 22 26 4 MIN. QFE PRESSURE IN HPA 1013.1 1011.5 1007.9 1007.6 1008.3 1007.8 1006.6 1005.3 1011.7 1015.5 1006.6 1016.9 1005.3 DAY 23 21 2 1 30 20 5 23 4 3 19 29 MEAN QNH PRESSURE IN HPA 1020.9 1020.7 1022.0 1017.7 1017.7 1012.1 1010.1 1009.5 1016.0 1019.6 1021.4 1024.6 1017.7 MAX. QNH PRESSURE IN HPA 1029.7 1032.9 1036.7 1040.9 1026.5 1022.2 1014.7 1017.2 1022.9 1025.4 1032.5 1029.2 1040.9 DAY 26 7 19 7 5 7 9 14 19 22 26 4 MIN. QNH PRESSURE IN HPA 1010.4 1008.8 1005.2 1004.9 1005.6 1005.1 1003.9 1002.6 1009.0 1012.8 1003.9 1014.2 1002.6 DAY 23 21 2 1 30 20 5 23 4 3 19 29 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 1022.8 1023.4 1024.0 1020.4 1020.1 1014.7 1012.9 1011.7 1018.5 1022.2 1023.6 1026.7 1020.1 MAX. QFE PRESSURE IN HPA 1031.8 1035.7 1039.6 1044.0 1031.1 1024.9 1019.6 1019.3 1025.6 1028.0 1034.5 1031.4 1044.0 DAY 28 7 19 7 5 7 7 14 19 22 26 4 MIN. QFE PRESSURE IN HPA 1011.4 1012.4 1000.0 1007.4 1007.8 1007.6 1006.0 1004.7 1011.6 1014.7 1006.4 1014.3 1000.0 DAY 16 21 2 1 30 20 5 23 4 10 19 29 MEAN QNH PRESSURE IN HPA 1020.0 1020.7 1021.3 1017.7 1017.4 1012.0 1010.2 1009.0 1015.8 1019.5 1020.9 1024.0 1017.4 MAX. QNH PRESSURE IN HPA 1029.1 1033.0 1036.8 1041.2 1028.4 1022.2 1016.9 1016.6 1022.9 1025.3 1031.8 1028.7 1041.2 DAY 28 7 19 7 5 7 7 14 19 22 26 4 MIN. QNH PRESSURE IN HPA 1008.7 1009.7 997.3 1004.7 1005.1 1004.9 1003.3 1002.0 1008.9 1012.0 1003.7 1011.6 997.3 DAY 16 21 2 1 30 20 5 23 4 10 19 29 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 1021.4 1022.2 1023.0 1019.6 1018.7 1013.5 1011.9 1011.7 1017.2 1021.1 1022.8 1026.0 1019.1 MAX. QFE PRESSURE IN HPA 1031.4 1032.3 1039.4 1043.4 1028.1 1024.2 1016.5 1039.1 1025.4 1027.3 1033.1 1030.4 1043.4 DAY 27 6 19 7 5 7 9 27 20 30 26 4 MIN. QFE PRESSURE IN HPA 1010.6 1010.8 1001.9 1005.3 1006.8 1004.0 1004.5 1003.1 1007.9 1013.3 1005.1 1012.3 1001.9 DAY 23 21 2 1 30 20 5 23 9 10 19 29 MEAN QNH PRESSURE IN HPA 1018.7 1019.5 1020.3 1016.9 1016.0 1010.8 1009.2 1009.0 1014.5 1018.4 1020.1 1023.3 1016.4 MAX. QNH PRESSURE IN HPA 1028.7 1029.6 1036.6 1040.6 1025.4 1021.5 1013.8 1036.3 1022.7 1024.6 1030.4 1027.7 1040.6 DAY 27 6 19 7 5 7 9 27 20 30 26 4 MIN. QNH PRESSURE IN HPA 1007.9 1008.1 999.2 1002.6 1004.1 1001.3 1001.8 1000.4 1005.2 1010.6 1002.4 1009.6 999.2 DAY 23 21 2 1 30 20 5 23 9 10 19 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1022.0 1022.5 1023.3 1019.6 1019.1 1012.8 1011.6 1010.4 1017.3 1021.2 1023.0 1026.0 1019.1 MAX. QFE PRESSURE IN HPA 1031.7 1035.5 1040.0 1043.5 1029.9 1023.8 1015.9 1017.5 1025.5 1027.3 1033.5 1030.0 1043.5 DAY 27 10 19 7 6 7 9 14 20 30 25 4 MIN. QFE PRESSURE IN HPA 1012.0 1010.6 1004.4 1007.6 1006.5 1002.4 1004.7 1002.3 1010.5 1013.4 1007.0 1012.5 1002.3 DAY 20 21 2 25 30 20 5 23 13 10 19 29 MEAN QNH PRESSURE IN HPA 1019.2 1019.8 1020.6 1016.9 1016.4 1010.1 1008.9 1007.7 1014.6 1018.5 1020.2 1023.3 1016.4 MAX. QNH PRESSURE IN HPA 1029.0 1032.8 1037.2 1040.7 1027.2 1021.1 1013.2 1014.8 1022.8 1024.6 1030.8 1027.3 1040.7 DAY 27 10 19 7 6 7 9 14 20 30 25 4 MIN. QNH PRESSURE IN HPA 1009.3 1007.9 1001.7 1004.9 1003.8 999.7 1002.0 999.6 1007.8 1010.7 1004.3 1009.8 999.6 DAY 20 21 2 25 30 20 5 23 13 10 19 29 MEAN QFF PRESSURE IN HPA 1019.5 1020.0 1020.8 1015.8 1016.8 1010.5 1009.3 1008.1 1015.0 1018.8 1020.5 1023.6 1016.5 MAX. QFF PRESSURE IN HPA 1029.2 1033.0 1037.4 1029.7 1027.5 1021.4 1013.6 1015.2 1023.1 1024.9 1031.0 1027.5 1037.4 DAY 27 10 19 8 6 7 9 14 20 30 25 16 MIN. QFF PRESSURE IN HPA 1009.6 1008.2 1002.0 1005.3 1004.2 1000.1 1002.4 1000.0 1008.2 1011.1 1004.6 1010.0 1000.0 DAY 20 21 2 25 30 20 5 23 13 10 19 29 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 RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.9 8.8 10.4 14.1 21.3 24.6 26.2 26.0 21.8 17.9 15.2 12.8 17.3 MINIMUN AIR TEMPERATURE (C) 5.0 4.9 5.1 9.6 15.8 18.7 21.6 20.9 18.9 14.3 10.0 7.2 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 6 27 17 2 0 0 0 52 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) 1.0 -1.0 1.0 3.0 11.0 15.0 20.0 16.0 15.0 9.0 5.0 3.0 -1.0 DAY 25 1 11 18 3 7 6 9 20 28 25 27 MAXIMUM AIR TEMPERATURE (C) 11.9 11.6 13.3 16.7 23.8 27.1 28.5 28.7 23.9 20.3 18.2 16.2 20.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 6 12 7 0 0 0 0 26 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 19.0 25.0 24.0 30.0 30.0 31.0 32.0 27.0 27.0 21.0 20.0 32.0 DAY 18 7 24 22 23 15 20 15 12 15 3 22 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 6.7 8.2 7.1 8.0 8.4 6.9 7.8 5.0 6.0 8.2 9.0 7.3 MEAN DAILY TEMP. (MDT) (C) 8.4 8.2 9.2 13.2 19.8 22.9 25.1 24.8 21.4 17.3 14.1 11.7 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 10.5 65.5 127.0 118.0 19.5 0.5 0.0 0.0 341.0 HEATING DEG. DAYS(BASE 18 0C) 296.5 273.5 255.5 148.0 9.5 0.0 0.0 0.0 0.0 36.5 116.5 195.0 1331.0 DEWPOINT (MEAN C) 5.9 6.0 6.4 12.1 17.7 20.3 22.2 22.2 20.4 15.4 12.9 11.1 14.4 MIXING RATIO (G/KG) 5.76 5.85 6.06 8.93 12.89 15.13 17.04 16.97 15.11 10.90 9.32 8.31 11.02 VAPOUR PRESSURE (HPA) 9.39 9.53 9.84 14.41 20.57 24.03 26.95 26.90 24.08 17.62 15.07 13.43 17.65 SATURATION DEF. (HPA) 2.20 1.98 3.12 2.00 5.20 7.38 7.34 6.98 2.22 3.21 2.53 1.67 3.82 RELATIVE HUMIDITY (MEAN %) 82 84 78 89 81 78 79 80 92 86 87 90 84 RELATIVE HUMIDITY (MAX. %) 93 97 90 98 92 89 88 90 98 94 96 98 94 RELATIVE HUMIDITY (MIN. %) 72 71 67 80 71 70 72 73 86 77 78 81 75 RELATIVE HUMIDITY (MEAN% 03UTC) 87 97 88 95 92 88 87 89 97 94 93 95 92 RELATIVE HUMIDITY (MEAN% 09UTC) 75 75 72 84 77 73 76 77 89 80 80 84 79 RELATIVE HUMIDITY (MEAN% 15UTC) 88 91 79 95 79 78 80 80 95 89 93 97 87 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 143.5 72.0 24.0 90.0 53.9 72.4 6.0 35.0 175.0 245.0 221.4 54.0 1192.2 DAYS WITH PRECIPITATION >=10 3 2 0 2 2 2 0 2 5 6 4 1 29 DAYS WITH PRECIPITATION >= 5 7 7 2 5 5 3 1 3 7 6 5 2 53 DAYS WITH PRECIPITATION >= 1 13 11 6 8 5 3 1 5 15 10 6 3 86 DAYS WITH PRECIPITATION 15 11 7 11 6 4 4 5 16 12 8 3 102 GREATEST DAILY PRECIPITATION 64.0 19.0 8.0 35.0 20.0 45.0 6.0 15.0 64.0 54.0 93.0 48.0 93.0 DAY 28 16 10 15 28 6 14 20 2 5 14 16 DAY WITH THUNDER STORM 1 0 0 0 2 0 0 0 0 0 0 1 4 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 1 0 2 WIND DIRECTION (PREVAILING) 225 90 90 90 90 90 360 90 270 225 90 225 90 PREVAILING WIND SPEED(KNOTS) 2.7 5.4 5.8 7.1 6.4 5.3 8.4 5.4 3.5 2.8 4.4 2.7 5.6 PREVAILING WIND PERCENT 20.6 30.7 33.1 33.3 35.5 24.0 33.5 25.2 20.7 21.9 22.0 23.2 21.9 CALMS PERCENT OF WIND 3.2 6.4 2.8 2.7 5.2 4.7 2.6 5.8 6.0 2.6 9.3 9.7 5.1 NO. OF WIND OBSERVATION 155 140 145 150 155 150 155 155 150 155 150 155 1815 VECTOR WIND DIRECTION (MEAN) 308 31 40 34 60 14 341 16 316 305 72 282 7 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.9 1.5 2.4 2.6 2.7 4.6 1.8 2.3 1.0 0.5 0.4 1.4 WIND STEADINESES (MEAN %) 9.8 18.4 28.3 38.7 49.1 50.9 73.0 34.0 50.0 25.0 14.3 10.5 28.6 WIND SPEED (MEAN KNOTS) 4.1 4.9 5.3 6.2 5.3 5.3 6.3 5.3 4.6 4.0 3.5 3.8 4.9 FASTEST WIND DIRECTION 320 300 10 330 350 320 350 350 320 300 40 270 330 FASTEST WIND SPEED (KNOTS) 20 22 20 25 17 20 20 22 24 20 25 22 25 DAY 29 17 31 22 25 15 4 11 24 15 14 24 DAYS WITH SKY CLEAR (0-2)/8 7 6 9 5 15 18 13 13 3 6 9 11 115 DAYS WITH P.CLOUDY (3-6)/8 12 7 9 10 10 8 7 5 3 9 11 13 104 DAYS WITH CLOUDY (7-8)/8 12 15 11 15 6 4 11 13 24 16 10 7 144 DAYS WITH VISIBILITY =< 2 KM 0 0 1 1 2 0 0 0 0 0 1 0 5 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1025.0 1024.1 1020.6 1018.8 1014.0 1012.5 1011.1 1014.0 1016.2 1024.0 1021.2 1019.5 1018.4 MAX. QFE PRESSURE IN HPA 1036.0 1037.2 1039.6 1031.4 1026.0 1020.1 1018.4 1021.9 1023.5 1037.2 1030.4 1031.5 1039.6 DAY-HOUR 8- 6 21- 6 3-15 16-15 1- 6 7- 3 24- 6 26- 6 7- 9 24- 9 14- 9 6- 6 MIN. QFE PRESSURE IN HPA 1009.5 1013.0 1007.6 1005.5 1000.1 1002.3 1002.4 1002.8 1005.6 1010.1 1003.7 1000.8 1000.1 DAY-HOUR 26-15 8-15 16-15 13- 3 27-15 5-15 11-12 19-15 12-12 15-12 22- 6 22-15 MEAN QNH PRESSURE IN HPA 1022.3 1021.4 1017.9 1016.1 1011.2 1009.8 1008.4 1011.2 1013.5 1021.3 1018.4 1016.8 1015.7 MAX. QNH PRESSURE IN HPA 1033.3 1034.5 1036.8 1028.7 1023.3 1017.4 1015.7 1019.2 1020.8 1034.5 1027.7 1028.8 1036.8 DAY-HOUR 8- 6 21- 6 3-15 16-15 1- 6 7- 3 24- 6 26- 6 7- 9 24- 9 14- 9 6- 6 MIN. QNH PRESSURE IN HPA 1006.8 1010.3 1004.9 1002.8 997.4 999.6 999.7 1000.1 1002.9 1007.4 1001.0 998.1 997.4 DAY-HOUR 26-15 8-15 16-15 13- 3 27-15 5-15 11-12 19-15 12-12 15-12 22- 6 22-15 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 1024.7 1023.9 1020.6 1018.7 1014.4 1012.8 1011.4 1014.2 1016.4 1023.9 1021.3 1019.5 1018.5 MAX. QFE PRESSURE IN HPA 1034.6 1036.2 1038.3 1030.9 1025.5 1020.1 1018.3 1020.8 1022.2 1035.3 1027.6 1029.5 1038.3 DAY 8 22 4 17 1 7 24 26 7 25 29 6 MIN. QFE PRESSURE IN HPA 1011.3 1015.7 1009.4 1005.5 1006.2 1003.5 1005.2 1005.4 1006.8 1012.6 1005.5 1002.7 1002.7 DAY 18 14 30 13 31 15 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1022.0 1021.2 1017.9 1016.0 1011.7 1010.1 1008.7 1011.5 1013.7 1021.2 1018.6 1016.8 1015.8 MAX. QNH PRESSURE IN HPA 1031.9 1033.5 1035.6 1028.2 1022.8 1017.4 1015.6 1018.1 1019.5 1032.6 1024.9 1026.8 1035.6 DAY 8 22 4 17 1 7 24 26 7 25 29 6 MIN. QNH PRESSURE IN HPA 1008.6 1013.0 1006.7 1002.8 1003.5 1000.8 1002.5 1002.7 1004.1 1009.9 1002.8 1000.0 1000.0 DAY 18 14 30 13 31 15 11 19 12 15 22 22 MEAN QFF PRESSURE IN HPA 1022.2 1021.4 1018.0 1016.3 1012.1 1010.5 1009.1 1011.9 1014.1 1021.5 1018.9 1017.0 1016.1 MAX. QFF PRESSURE IN HPA 1032.1 1033.7 1035.8 1028.4 1023.1 1017.7 1016.0 1018.5 1019.8 1032.8 1025.1 1027.1 1035.8 DAY 8 22 4 17 1 7 24 26 7 25 29 6 MIN. QFF PRESSURE IN HPA 1008.9 1013.3 1007.0 1003.1 1003.9 1001.2 1002.9 1003.1 1004.5 1010.2 1003.1 1000.3 1000.3 DAY 18 14 30 13 31 15 11 19 12 15 22 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1025.7 1024.9 1021.8 1019.5 1015.0 1013.1 1011.7 1015.0 1017.0 1024.7 1022.0 1020.6 1019.2 MAX. QFE PRESSURE IN HPA 1036.0 1037.2 1038.7 1031.0 1026.0 1019.9 1018.4 1021.9 1023.4 1036.5 1028.5 1031.5 1038.7 DAY 8 21 4 17 1 7 24 26 7 24 14 6 MIN. QFE PRESSURE IN HPA 1012.4 1015.6 1010.2 1005.6 1006.9 1004.5 1004.6 1005.9 1006.8 1012.7 1003.7 1003.3 1003.3 DAY 21 8 30 13 31 15 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1023.0 1022.1 1019.1 1016.7 1012.3 1010.4 1009.0 1012.3 1014.3 1022.0 1019.3 1017.8 1016.5 MAX. QNH PRESSURE IN HPA 1033.3 1034.5 1036.0 1028.3 1023.3 1017.2 1015.7 1019.2 1020.7 1033.8 1025.8 1028.8 1036.0 DAY 8 21 4 17 1 7 24 26 7 24 14 6 MIN. QNH PRESSURE IN HPA 1009.7 1012.9 1007.5 1002.9 1004.2 1001.8 1001.9 1003.2 1004.1 1010.0 1001.0 1000.6 1000.6 DAY 21 8 30 13 31 15 11 19 12 15 22 22 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 1025.4 1024.6 1021.4 1019.2 1014.6 1013.0 1011.5 1014.6 1016.5 1024.4 1021.7 1019.9 1018.9 MAX. QFE PRESSURE IN HPA 1036.0 1037.2 1038.1 1029.8 1024.3 1020.1 1018.3 1021.2 1023.5 1037.2 1030.4 1031.3 1038.1 DAY 8 21 3 16 1 7 24 26 7 24 14 6 MIN. QFE PRESSURE IN HPA 1012.5 1014.7 1009.2 1006.1 1005.7 1004.7 1003.4 1005.4 1006.8 1011.9 1003.7 1002.5 1002.5 DAY 18 8 30 13 31 14 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1022.7 1021.9 1018.7 1016.5 1011.9 1010.3 1008.8 1011.9 1013.8 1021.7 1019.0 1017.2 1016.2 MAX. QNH PRESSURE IN HPA 1033.3 1034.5 1035.4 1027.1 1021.6 1017.4 1015.6 1018.5 1020.8 1034.5 1027.7 1028.6 1035.4 DAY 8 21 3 16 1 7 24 26 7 24 14 6 MIN. QNH PRESSURE IN HPA 1009.8 1012.0 1006.5 1003.4 1003.0 1002.0 1000.7 1002.7 1004.1 1009.2 1001.0 999.8 999.8 DAY 18 8 30 13 31 14 11 19 12 15 22 22 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 1024.4 1023.5 1019.7 1018.4 1013.1 1012.0 1010.6 1013.2 1015.5 1023.4 1020.4 1018.7 1017.8 MAX. QFE PRESSURE IN HPA 1035.0 1036.0 1038.1 1031.2 1022.6 1019.9 1016.3 1019.0 1022.3 1035.8 1030.3 1030.3 1038.1 DAY 8 21 3 16 17 7 24 9 24 24 14 6 MIN. QFE PRESSURE IN HPA 1009.7 1013.3 1008.3 1006.4 1002.7 1003.7 1002.4 1003.0 1005.6 1010.1 1005.4 1001.0 1001.0 DAY 20 8 30 29 27 5 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1021.7 1020.8 1017.0 1015.7 1010.4 1009.3 1007.9 1010.5 1012.8 1020.7 1017.7 1016.0 1015.1 MAX. QNH PRESSURE IN HPA 1032.3 1033.3 1035.4 1028.5 1019.9 1017.2 1013.6 1016.3 1019.6 1033.1 1027.6 1027.6 1035.4 DAY 8 21 3 16 17 7 24 9 24 24 14 6 MIN. QNH PRESSURE IN HPA 1007.0 1010.6 1005.6 1003.7 1000.0 1001.0 999.7 1000.3 1002.9 1007.4 1002.7 998.3 998.3 DAY 20 8 30 29 27 5 11 19 12 15 22 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1024.7 1023.8 1019.6 1018.3 1012.7 1011.7 1010.1 1012.8 1015.5 1023.6 1020.5 1018.9 1017.7 MAX. QFE PRESSURE IN HPA 1034.8 1036.0 1039.6 1031.4 1022.6 1020.0 1015.7 1018.9 1022.3 1035.9 1030.3 1030.3 1039.6 DAY 8 21 3 16 17 7 15 20 24 24 14 6 MIN. QFE PRESSURE IN HPA 1009.5 1013.0 1007.6 1006.0 1000.1 1002.3 1002.6 1002.8 1006.3 1012.2 1004.3 1000.8 1000.1 DAY 26 8 16 29 27 5 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1022.0 1021.1 1016.9 1015.6 1010.0 1009.0 1007.5 1010.1 1012.8 1020.8 1017.8 1016.2 1015.0 MAX. QNH PRESSURE IN HPA 1032.1 1033.3 1036.8 1028.7 1019.9 1017.3 1013.0 1016.2 1019.6 1033.2 1027.6 1027.6 1036.8 DAY 8 21 3 16 17 7 15 20 24 24 14 6 MIN. QNH PRESSURE IN HPA 1006.8 1010.3 1004.9 1003.3 997.4 999.6 999.9 1000.1 1003.6 1009.5 1001.6 998.1 997.4 DAY 26 8 16 29 27 5 11 19 12 15 22 22 MEAN QFF PRESSURE IN HPA 1022.3 1021.3 1017.1 1015.9 1010.3 1009.4 1007.9 1010.5 1013.2 1021.2 1018.1 1016.5 1015.3 MAX. QFF PRESSURE IN HPA 1032.3 1033.5 1037.1 1028.9 1020.2 1017.6 1013.4 1016.6 1019.9 1033.4 1027.8 1027.9 1037.1 DAY 8 21 3 16 17 7 15 20 24 24 14 6 MIN. QFF PRESSURE IN HPA 1007.1 1010.6 1005.2 1003.7 997.8 1000.0 1000.3 1000.5 1004.0 1009.8 1001.9 998.4 997.8 DAY 26 8 16 29 27 5 11 19 12 15 22 22 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 RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 10.5 12.0 14.0 19.2 22.7 27.6 26.2 22.8 18.7 14.0 11.4 17.3 MINIMUN AIR TEMPERATURE (C) 4.8 6.3 8.5 9.7 14.6 17.6 22.5 21.8 18.7 14.8 10.5 7.2 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 3 30 24 6 0 0 0 63 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 1.0 2.0 3.0 5.0 11.0 11.0 20.0 18.0 14.0 8.0 5.0 2.0 1.0 DAY 19 14 13 14 1 11 7 11 19 12 16 11 MAXIMUM AIR TEMPERATURE (C) 11.7 13.1 14.4 16.0 21.4 25.1 30.2 28.5 25.5 21.5 16.8 14.7 19.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 19 11 0 0 0 0 30 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.0 23.0 22.0 20.0 28.0 29.0 33.0 31.0 29.0 26.0 22.0 26.0 33.0 DAY 4 16 4 29 17 7 26 1 1 6 1 20 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 6.8 5.9 6.3 6.8 7.5 7.7 6.7 6.8 6.7 6.3 7.5 6.8 MEAN DAILY TEMP. (MDT) (C) 8.2 9.7 11.5 12.9 18.0 21.4 26.3 25.1 22.1 18.1 13.7 10.9 16.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 33.5 165.5 128.5 44.5 2.5 0.0 0.0 375.0 HEATING DEG. DAYS(BASE 18 0C) 302.5 232.5 203.0 154.0 24.5 2.0 0.0 0.0 0.0 32.0 131.5 221.0 1303.0 DEWPOINT (MEAN C) ***** 8.2 9.6 11.4 17.0 20.1 23.6 23.9 19.4 16.3 12.0 9.8 ***** MIXING RATIO (G/KG) ****** 6.74 7.47 8.43 12.20 14.91 18.58 18.91 14.28 11.77 8.77 7.57 ****** VAPOUR PRESSURE (HPA) ****** 10.92 12.08 13.62 19.56 23.74 29.32 29.91 22.85 18.95 14.28 12.27 ****** SATURATION DEF. (HPA) ****** 2.03 2.05 2.56 2.95 4.23 7.96 4.42 5.39 3.12 2.02 1.50 ****** RELATIVE HUMIDITY (MEAN %) *** 86 87 85 88 86 79 88 82 87 88 91 *** RELATIVE HUMIDITY (MAX. %) 94 95 95 95 96 97 87 94 93 96 97 98 95 RELATIVE HUMIDITY (MIN. %) 78 79 78 78 80 75 72 82 72 78 80 83 78 RELATIVE HUMIDITY (MEAN% 03UTC) 92 93 93 93 95 95 84 93 90 95 95 96 93 RELATIVE HUMIDITY (MEAN% 09UTC) 81 82 81 82 86 81 76 86 77 83 83 87 82 RELATIVE HUMIDITY (MEAN% 15UTC) 91 86 89 85 86 92 80 89 85 91 92 94 88 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 110.6 26.3 49.3 68.0 33.3 35.0 2.0 182.0 235.0 252.1 604.2 183.0 1780.8 DAYS WITH PRECIPITATION >=10 6 0 1 2 1 1 0 5 5 6 9 7 43 DAYS WITH PRECIPITATION >= 5 8 2 1 7 2 3 0 6 6 7 9 8 59 DAYS WITH PRECIPITATION >= 1 9 7 9 15 8 6 1 8 8 8 11 14 104 DAYS WITH PRECIPITATION 10 7 9 19 10 7 3 8 8 8 13 14 116 GREATEST DAILY PRECIPITATION 22.0 9.0 33.0 12.0 10.0 11.0 2.0 110.0 140.0 87.0 195.0 47.0 195.0 DAY 5 8 11 21 11 9 12 24 17 22 9 24 DAY WITH THUNDER STORM 0 0 0 0 2 1 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 0 0 0 1 0 1 0 0 2 WIND DIRECTION (PREVAILING) 315 90 90 315 90 90 360 45 225 225 225 90 90 PREVAILING WIND SPEED(KNOTS) 6.4 7.2 6.1 10.6 5.1 5.6 9.1 5.1 2.6 2.9 2.7 5.4 5.4 PREVAILING WIND PERCENT 18.1 17.9 32.9 20.7 35.5 24.5 23.2 21.9 16.7 19.4 23.3 23.2 21.5 CALMS PERCENT OF WIND 7.7 11.4 7.7 10.0 7.1 8.6 6.5 10.3 14.0 12.3 6.7 9.7 9.3 NO. OF WIND OBSERVATION 155 140 155 150 155 151 155 155 150 155 150 155 1826 VECTOR WIND DIRECTION (MEAN) 317 59 26 349 50 16 20 30 355 360 154 82 21 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.4 1.6 2.8 2.3 2.6 3.4 1.7 0.8 1.4 0.4 0.4 1.4 WIND STEADINESES (MEAN %) 11.4 29.2 28.6 50.0 47.9 47.3 58.6 37.8 23.5 34.1 10.8 10.8 29.8 WIND SPEED (MEAN KNOTS) 4.4 4.8 5.6 5.6 4.8 5.5 5.8 4.5 3.4 4.1 3.7 3.7 4.7 FASTEST WIND DIRECTION 270 360 330 330 330 310 350 320 300 330 80 90 330 FASTEST WIND SPEED (KNOTS) 24 20 25 25 15 25 18 12 15 27 13 14 27 DAY 5 21 10 11 10 14 6 8 12 10 9 3 DAYS WITH SKY CLEAR (0-2)/8 7 4 1 6 10 8 19 16 8 4 5 8 96 DAYS WITH P.CLOUDY (3-6)/8 11 9 8 6 7 15 8 7 12 12 11 10 116 DAYS WITH CLOUDY (7-8)/8 13 15 22 18 14 7 4 8 10 15 14 13 153 DAYS WITH VISIBILITY =< 2 KM 0 1 5 3 2 0 0 2 1 1 0 1 16 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** 1018.3 1018.2 1018.9 1017.1 1015.2 1011.6 1014.9 1018.6 1021.7 1028.2 1020.9 ****** MAX. QFE PRESSURE IN HPA ****** 1029.0 1028.8 1034.5 1029.0 1024.9 1019.3 1024.6 1028.4 1031.0 1038.3 1038.9 ****** DAY-HOUR **-** 10- 3 6- 6 19- 6 18- 9 17-15 27- 6 26- 6 25- 9 18-15 23- 6 3-15 MIN. QFE PRESSURE IN HPA ****** 999.5 998.6 1007.9 1006.4 1001.3 1003.7 1002.3 1005.1 1007.8 1018.5 1005.0 ****** DAY-HOUR **-** 20-15 27-15 29- 3 9- 9 7-15 21-15 21-15 11-15 9-12 7-12 19-15 MEAN QNH PRESSURE IN HPA ****** 1015.6 1015.5 1016.2 1014.4 1012.5 1008.9 1012.2 1015.9 1019.0 1025.5 1018.2 ****** MAX. QNH PRESSURE IN HPA ****** 1026.3 1026.1 1031.8 1026.3 1022.2 1016.6 1021.9 1025.7 1028.3 1035.6 1036.2 ****** DAY-HOUR **-** 10- 3 6- 6 19- 6 18- 9 17-15 27- 6 26- 6 25- 9 18-15 23- 6 3-15 MIN. QNH PRESSURE IN HPA ****** 996.8 995.9 1005.2 1003.7 998.6 1001.0 999.6 1002.4 1005.1 1015.8 1002.3 ****** DAY-HOUR **-** 20-15 27-15 29- 3 9- 9 7-15 21-15 21-15 11-15 9-12 7-12 19-15 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 1022.1 1018.5 1018.1 1018.3 1017.3 1015.4 1011.8 1015.4 1018.6 1021.8 1028.2 1020.9 1018.9 MAX. QFE PRESSURE IN HPA 1030.0 1029.0 1027.9 1028.5 1025.8 1024.6 1019.0 1023.9 1026.7 1028.2 1037.1 1031.6 1037.1 DAY 11 10 6 24 19 18 27 26 26 28 23 10 MIN. QFE PRESSURE IN HPA 1009.4 1002.7 999.3 1007.9 1009.3 1006.9 1004.9 1006.5 1008.4 1009.5 1018.7 1007.0 999.3 DAY 4 18 28 29 9 7 4 21 11 10 7 20 MEAN QNH PRESSURE IN HPA 1019.4 1015.8 1015.4 1015.5 1014.6 1012.7 1009.1 1012.7 1015.9 1019.1 1025.5 1018.1 1016.2 MAX. QNH PRESSURE IN HPA 1027.3 1026.3 1025.2 1025.8 1023.1 1021.9 1016.3 1021.2 1024.0 1025.5 1034.4 1028.9 1034.4 DAY 11 10 6 24 19 18 27 26 26 28 23 10 MIN. QNH PRESSURE IN HPA 1006.7 1000.0 996.6 1005.2 1006.6 1004.2 1002.2 1003.8 1005.7 1006.8 1016.0 1004.3 996.6 DAY 4 18 28 29 9 7 4 21 11 10 7 20 MEAN QFF PRESSURE IN HPA 1018.9 1015.4 1015.4 1015.8 1015.0 1013.1 1009.5 1013.1 1016.3 1019.5 1025.7 1018.4 1016.3 MAX. QFF PRESSURE IN HPA 1027.5 1026.5 1024.1 1026.0 1023.4 1022.2 1016.7 1021.6 1024.3 1025.8 1034.6 1029.1 1034.6 DAY 11 10 22 24 19 18 27 26 26 28 23 10 MIN. QFF PRESSURE IN HPA 1007.0 1000.3 996.9 1005.5 1007.0 1004.6 1002.6 1004.2 1006.1 1007.2 1016.3 1004.6 996.9 DAY 4 18 28 29 9 7 4 21 11 10 7 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1022.7 1019.2 1018.9 1019.5 1017.8 1015.7 1012.1 1015.6 1019.2 1022.3 1028.9 1021.7 1019.5 MAX. QFE PRESSURE IN HPA 1031.8 1028.6 1028.8 1034.5 1027.5 1024.6 1019.3 1024.6 1028.2 1028.9 1038.3 1034.0 1038.3 DAY 11 23 6 19 18 18 27 26 25 27 23 10 MIN. QFE PRESSURE IN HPA 1009.9 1005.4 1001.3 1010.3 1008.0 1005.5 1004.7 1005.8 1007.9 1010.5 1019.7 1009.2 1001.3 DAY 4 18 28 29 9 7 4 21 11 10 7 19 MEAN QNH PRESSURE IN HPA 1020.0 1016.5 1016.2 1016.8 1015.1 1013.0 1009.4 1012.9 1016.5 1019.6 1026.2 1018.9 1016.8 MAX. QNH PRESSURE IN HPA 1029.1 1025.9 1026.1 1031.8 1024.8 1021.9 1016.6 1021.9 1025.5 1026.2 1035.6 1031.3 1035.6 DAY 11 23 6 19 18 18 27 26 25 27 23 10 MIN. QNH PRESSURE IN HPA 1007.2 1002.7 998.6 1007.6 1005.3 1002.8 1002.0 1003.1 1005.2 1007.8 1017.0 1006.5 998.6 DAY 4 18 28 29 9 7 4 21 11 10 7 19 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 1022.2 1018.9 1018.8 1019.4 1017.7 1015.7 1012.0 1015.3 1019.0 1021.9 1028.2 1020.8 1019.2 MAX. QFE PRESSURE IN HPA 1032.0 1028.3 1028.4 1033.8 1029.0 1024.3 1019.3 1024.6 1028.4 1029.0 1037.8 1033.0 1037.8 DAY 11 23 15 19 18 18 27 26 25 27 23 10 MIN. QFE PRESSURE IN HPA 1009.6 1005.5 1001.8 1010.3 1006.4 1004.6 1005.0 1004.9 1007.6 1010.4 1019.4 1006.5 1001.8 DAY 4 20 28 29 9 7 4 21 11 9 7 19 MEAN QNH PRESSURE IN HPA 1019.5 1016.1 1016.1 1016.7 1015.0 1013.0 1009.3 1012.6 1016.3 1019.1 1025.5 1018.1 1016.4 MAX. QNH PRESSURE IN HPA 1029.3 1025.6 1025.7 1031.1 1026.3 1021.6 1016.6 1021.9 1025.7 1026.3 1035.1 1030.3 1035.1 DAY 11 23 15 19 18 18 27 26 25 27 23 10 MIN. QNH PRESSURE IN HPA 1006.9 1002.8 999.1 1007.6 1003.7 1001.9 1002.3 1002.2 1004.9 1007.7 1016.7 1003.8 999.1 DAY 4 20 28 29 9 7 4 21 11 9 7 19 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 1021.6 1017.5 1017.6 1018.7 1016.6 1014.8 1011.2 1014.3 1018.3 1021.2 1027.8 1020.4 1018.3 MAX. QFE PRESSURE IN HPA 1029.1 1026.9 1027.0 1031.8 1026.8 1024.6 1018.6 1023.5 1028.1 1029.5 1037.5 1035.4 1037.5 DAY 31 13 15 19 18 17 27 26 25 11 23 3 MIN. QFE PRESSURE IN HPA 1007.4 1000.7 1000.6 1011.0 1007.6 1002.6 1004.4 1002.5 1005.4 1007.8 1018.5 1005.1 1000.6 DAY 4 20 27 28 9 7 4 21 11 9 7 19 MEAN QNH PRESSURE IN HPA 1018.9 1014.7 1014.9 1016.0 1013.9 1012.1 1008.5 1011.6 1015.6 1018.5 1025.0 1017.6 1015.6 MAX. QNH PRESSURE IN HPA 1026.4 1024.2 1024.3 1029.1 1024.1 1021.9 1015.9 1020.8 1025.4 1026.8 1034.8 1032.7 1034.8 DAY 31 13 15 19 18 17 27 26 25 11 23 3 MIN. QNH PRESSURE IN HPA 1004.7 998.0 997.9 1008.3 1004.9 999.9 1001.7 999.8 1002.7 1005.1 1015.8 1002.4 997.9 DAY 4 20 27 28 9 7 4 21 11 9 7 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1021.4 1017.7 1017.5 1018.6 1016.3 1014.5 1010.7 1013.9 1018.0 1021.4 1028.0 1020.9 1018.2 MAX. QFE PRESSURE IN HPA 1029.1 1028.0 1026.9 1029.8 1026.9 1024.9 1017.9 1023.1 1028.1 1031.0 1036.9 1038.9 1038.9 DAY 10 9 6 19 18 17 27 26 25 18 23 3 MIN. QFE PRESSURE IN HPA 1007.7 999.5 998.6 1010.7 1006.8 1001.3 1003.7 1002.3 1005.1 1008.2 1018.8 1005.0 998.6 DAY 4 20 27 28 9 7 21 21 11 9 6 19 MEAN QNH PRESSURE IN HPA 1018.7 1015.0 1014.8 1015.9 1013.6 1011.8 1008.0 1011.2 1015.3 1018.7 1025.3 1018.2 1015.5 MAX. QNH PRESSURE IN HPA 1026.4 1025.3 1024.2 1027.1 1024.2 1022.2 1015.2 1020.4 1025.4 1028.3 1034.2 1036.2 1036.2 DAY 10 9 6 19 18 17 27 26 25 18 23 3 MIN. QNH PRESSURE IN HPA 1005.0 996.8 995.9 1008.0 1004.1 998.6 1001.0 999.6 1002.4 1005.5 1016.1 1002.3 995.9 DAY 4 20 27 28 9 7 21 21 11 9 6 19 MEAN QFF PRESSURE IN HPA 1018.9 1015.2 1015.1 1015.8 1014.0 1012.1 1008.4 1011.6 1015.7 1019.0 1025.6 1018.5 1015.8 MAX. QFF PRESSURE IN HPA 1026.6 1025.5 1024.4 1026.9 1024.5 1022.5 1015.6 1020.8 1025.7 1028.6 1034.4 1036.4 1036.4 DAY 10 9 6 18 18 17 27 26 25 18 23 3 MIN. QFF PRESSURE IN HPA 1005.3 997.1 996.2 1008.3 1004.5 999.0 1001.4 1000.0 1002.8 1005.9 1016.4 1002.6 996.2 DAY 4 20 27 28 9 7 21 21 11 9 6 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.7 10.6 9.6 14.1 18.6 23.0 26.2 25.6 23.6 19.7 13.4 8.3 17.0 MINIMUN AIR TEMPERATURE (C) 6.8 7.7 5.7 11.4 14.8 19.1 21.8 21.7 19.9 16.5 8.7 3.6 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 9 27 25 11 0 0 0 72 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 2 0 0 0 0 0 0 0 0 7 9 TEMPERATURE RECORDS LOWEST(C) 2.0 3.0 -1.0 7.0 12.0 15.0 16.0 19.0 17.0 12.0 3.0 -2.0 -2.0 DAY 9 4 8 2 1 18 1 4 11 30 27 26 MAXIMUM AIR TEMPERATURE (C) 13.6 13.0 12.5 16.3 21.2 25.2 28.6 28.4 26.2 22.2 16.7 12.1 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 10 10 0 0 0 0 20 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 23.0 22.0 26.0 29.0 29.0 31.0 31.0 29.0 25.0 23.0 20.0 31.0 DAY 16 20 25 29 27 19 19 24 3 11 15 23 DIF. BETWEEN (MAX.-MIN.) (C) 6.8 5.3 6.8 4.9 6.4 6.1 6.8 6.7 6.3 5.7 8.0 8.5 6.6 MEAN DAILY TEMP. (MDT) (C) 10.2 10.3 9.1 13.8 18.0 22.1 25.2 25.0 23.1 19.3 12.7 7.9 16.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 4.5 38.0 130.0 125.0 67.0 2.5 0.0 0.0 367.0 HEATING DEG. DAYS(BASE 18 0C) 240.5 214.5 276.0 127.0 28.5 0.0 0.0 0.0 0.0 9.5 157.5 314.5 1368.0 DEWPOINT (MEAN C) 9.4 9.4 8.5 13.3 16.1 20.2 22.4 22.3 21.3 17.2 9.9 5.3 14.6 MIXING RATIO (G/KG) 7.34 7.34 6.98 9.58 11.53 14.88 17.16 17.11 15.99 12.33 7.60 5.68 11.13 VAPOUR PRESSURE (HPA) 11.90 11.90 11.28 15.39 18.44 23.69 27.14 27.11 25.48 19.84 12.34 9.24 17.81 SATURATION DEF. (HPA) 1.19 1.11 0.94 0.85 3.18 4.66 7.19 6.07 4.03 3.33 3.38 2.15 3.17 RELATIVE HUMIDITY (MEAN %) 92 93 93 95 86 84 80 83 87 86 81 83 87 RELATIVE HUMIDITY (MAX. %) 99 98 99 99 94 92 88 93 96 95 92 95 95 RELATIVE HUMIDITY (MIN. %) 83 87 86 90 78 78 73 75 79 78 69 70 79 RELATIVE HUMIDITY (MEAN% 03UTC) 95 97 97 99 93 92 88 92 94 93 88 92 93 RELATIVE HUMIDITY (MEAN% 09UTC) 87 90 90 93 84 82 76 78 82 80 72 72 82 RELATIVE HUMIDITY (MEAN% 15UTC) 97 95 97 96 86 83 80 84 91 92 89 89 90 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 65.5 60.0 112.0 40.2 67.1 77.2 12.4 51.0 117.0 334.3 321.0 211.0 1468.7 DAYS WITH PRECIPITATION >=10 4 2 4 1 1 3 0 0 2 5 8 4 34 DAYS WITH PRECIPITATION >= 5 4 3 6 4 5 6 1 6 5 9 9 6 64 DAYS WITH PRECIPITATION >= 1 7 8 12 9 15 9 3 10 9 18 11 10 121 DAYS WITH PRECIPITATION 11 12 15 13 16 11 6 12 11 20 12 13 152 GREATEST DAILY PRECIPITATION 16.0 27.0 30.0 11.0 22.0 24.0 6.0 9.0 48.0 111.0 108.0 79.0 111.0 DAY 24 28 26 21 18 8 26 28 23 18 2 25 DAY WITH THUNDER STORM 0 1 0 0 3 1 0 1 0 1 0 0 7 DAYS WITH SNOW OR SLEET 0 0 1 0 0 0 0 0 0 0 0 1 2 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 90 90 90 90 90 90 315 315 315 315 90 315 90 PREVAILING WIND SPEED(KNOTS) 4.5 4.8 6.1 4.9 5.1 5.1 8.4 7.0 6.1 6.5 3.5 5.4 4.6 PREVAILING WIND PERCENT 30.4 34.3 32.9 43.3 38.7 34.0 23.9 21.9 25.3 25.2 24.0 18.7 26.9 CALMS PERCENT OF WIND 8.2 7.9 3.2 5.3 9.0 6.0 8.4 10.3 7.3 1.3 16.0 28.4 9.3 NO. OF WIND OBSERVATION 158 140 155 150 155 150 155 155 150 155 150 155 1828 VECTOR WIND DIRECTION (MEAN) 312 352 331 54 9 50 334 337 316 293 333 295 339 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.0 0.9 1.4 1.3 1.2 2.7 2.1 1.5 1.5 0.4 1.3 1.1 WIND STEADINESES (MEAN %) 19.6 20.8 14.8 33.3 26.0 27.3 50.9 47.7 39.5 37.5 13.3 44.8 25.0 WIND SPEED (MEAN KNOTS) 4.6 4.8 6.1 4.2 5.0 4.4 5.3 4.4 3.8 4.0 3.0 2.9 4.4 FASTEST WIND DIRECTION 290 330 300 300 290 290 280 330 320 300 300 300 300 FASTEST WIND SPEED (KNOTS) 18 16 30 13 18 16 25 20 18 16 15 18 30 DAY 4 24 5 30 11 1 24 10 6 21 4 10 DAYS WITH SKY CLEAR (0-2)/8 3 2 8 2 4 9 6 3 7 5 8 8 65 DAYS WITH P.CLOUDY (3-6)/8 10 9 7 6 14 7 12 14 10 10 11 7 117 DAYS WITH CLOUDY (7-8)/8 18 17 16 22 13 14 13 14 13 16 11 16 183 DAYS WITH VISIBILITY =< 2 KM 1 2 2 2 1 2 0 1 3 3 2 3 22 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1020.6 1021.2 1018.0 1015.0 1013.3 1014.3 1011.1 1013.1 1017.5 1021.4 1023.4 1023.1 1017.7 MAX. QFE PRESSURE IN HPA 1033.1 1037.4 1032.4 1026.8 1022.4 1023.5 1016.5 1019.2 1032.7 1032.7 1036.8 1044.5 1044.5 DAY-HOUR 5- 6 7- 6 7- 6 2- 9 13- 9 12-12 29- 3 5- 6 24- 6 18- 3 26- 9 26- 6 MIN. QFE PRESSURE IN HPA 1011.1 1004.9 1000.2 1004.7 1004.2 1004.1 1004.3 1005.6 1008.4 1013.4 1013.0 1006.7 1000.2 DAY-HOUR 26-15 23-12 5- 9 29- 3 27-12 19-15 23-15 23-15 3-12 20-15 16- 3 10- 3 MEAN QNH PRESSURE IN HPA 1017.9 1018.5 1015.3 1012.3 1010.6 1011.6 1008.4 1010.4 1014.7 1018.7 1020.7 1020.3 1014.9 MAX. QNH PRESSURE IN HPA 1030.4 1034.7 1029.7 1024.1 1019.7 1020.8 1013.8 1016.5 1030.0 1030.0 1034.1 1041.7 1041.7 DAY-HOUR 5- 6 7- 6 7- 6 2- 9 13- 9 12-12 29- 3 5- 6 24- 6 18- 3 26- 9 26- 6 MIN. QNH PRESSURE IN HPA 1008.4 1002.2 997.5 1002.0 1001.5 1001.4 1001.6 1002.9 1005.7 1010.7 1010.3 1004.0 997.5 DAY-HOUR 26-15 23-12 5- 9 29- 3 27-12 19-15 23-15 23-15 3-12 20-15 16- 3 10- 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 1020.7 1021.1 1018.3 1015.1 1013.3 1014.7 1011.4 1013.5 1017.7 1021.5 1023.2 1023.1 1017.8 MAX. QFE PRESSURE IN HPA 1032.0 1036.6 1031.0 1025.0 1021.7 1021.5 1016.5 1018.7 1031.6 1032.7 1031.8 1042.9 1042.9 DAY 5 8 7 2 13 13 29 5 24 18 26 26 MIN. QFE PRESSURE IN HPA 1012.6 1005.0 1004.3 1004.7 1005.9 1006.1 1006.4 1006.2 1009.1 1013.6 1013.0 1006.7 1004.3 DAY 26 23 16 29 29 19 4 12 3 21 16 10 MEAN QNH PRESSURE IN HPA 1017.9 1018.4 1015.6 1012.4 1010.6 1012.0 1008.7 1010.8 1015.0 1018.8 1020.5 1020.4 1015.1 MAX. QNH PRESSURE IN HPA 1029.3 1033.9 1028.3 1022.3 1019.0 1018.8 1013.8 1016.0 1028.9 1030.0 1029.1 1040.1 1040.1 DAY 5 8 7 2 13 13 29 5 24 18 26 26 MIN. QNH PRESSURE IN HPA 1009.9 1002.3 1001.6 1002.0 1003.2 1003.4 1003.7 1003.5 1006.4 1010.9 1010.3 1004.0 1001.6 DAY 26 23 16 29 29 19 4 12 3 21 16 10 MEAN QFF PRESSURE IN HPA 1018.2 1018.7 1015.8 1012.7 1010.9 1012.4 1009.1 1011.2 1015.4 1019.1 1020.8 1020.6 1015.4 MAX. QFF PRESSURE IN HPA 1029.5 1034.1 1028.5 1022.6 1019.3 1019.1 1014.2 1016.4 1029.2 1030.3 1029.3 1040.3 1040.3 DAY 5 8 7 2 13 13 29 5 24 18 26 26 MIN. QFF PRESSURE IN HPA 1010.2 1002.6 1001.9 1002.3 1003.6 1003.8 1004.1 1003.9 1006.8 1011.3 1010.6 1004.3 1001.9 DAY 26 23 16 29 29 19 4 12 3 21 16 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1021.6 1022.0 1018.7 1015.8 1013.8 1014.8 1011.6 1013.7 1018.2 1022.2 1024.5 1023.8 1018.4 MAX. QFE PRESSURE IN HPA 1033.1 1037.4 1032.4 1026.5 1022.3 1022.4 1016.5 1019.2 1032.7 1032.1 1036.5 1044.5 1044.5 DAY 5 7 7 2 13 12 29 5 24 18 26 26 MIN. QFE PRESSURE IN HPA 1012.5 1006.1 1004.4 1005.3 1005.7 1005.6 1006.3 1006.2 1009.4 1016.5 1017.1 1007.8 1004.4 DAY 26 23 5 29 29 19 4 12 3 31 24 10 MEAN QNH PRESSURE IN HPA 1018.9 1019.2 1016.0 1013.1 1011.1 1012.1 1008.9 1011.0 1015.5 1019.5 1021.8 1021.1 1015.7 MAX. QNH PRESSURE IN HPA 1030.4 1034.7 1029.7 1023.8 1019.6 1019.7 1013.8 1016.5 1030.0 1029.4 1033.8 1041.7 1041.7 DAY 5 7 7 2 13 12 29 5 24 18 26 26 MIN. QNH PRESSURE IN HPA 1009.8 1003.4 1001.7 1002.6 1003.0 1002.9 1003.6 1003.5 1006.7 1013.8 1014.4 1005.1 1001.7 DAY 26 23 5 29 29 19 4 12 3 31 24 10 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 1020.4 1021.5 1018.2 1015.4 1013.7 1014.7 1011.4 1013.5 1017.6 1021.7 1023.7 1022.9 1017.9 MAX. QFE PRESSURE IN HPA 1032.2 1037.1 1032.3 1026.8 1022.4 1023.1 1015.9 1019.1 1031.4 1030.9 1036.8 1043.9 1043.9 DAY 5 7 7 2 13 12 29 5 24 18 26 26 MIN. QFE PRESSURE IN HPA 1011.4 1006.1 1000.2 1005.5 1007.0 1005.5 1005.7 1006.9 1008.8 1015.7 1015.1 1007.2 1000.2 DAY 26 23 5 29 29 19 4 12 3 31 24 10 MEAN QNH PRESSURE IN HPA 1017.7 1018.8 1015.5 1012.7 1011.0 1012.0 1008.7 1010.8 1014.9 1019.0 1021.0 1020.2 1015.2 MAX. QNH PRESSURE IN HPA 1029.5 1034.4 1029.6 1024.1 1019.7 1020.4 1013.2 1016.4 1028.7 1028.2 1034.1 1041.1 1041.1 DAY 5 7 7 2 13 12 29 5 24 18 26 26 MIN. QNH PRESSURE IN HPA 1008.7 1003.4 997.5 1002.8 1004.3 1002.8 1003.0 1004.2 1006.1 1013.0 1012.4 1004.5 997.5 DAY 26 23 5 29 29 19 4 12 3 31 24 10 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 1019.8 1020.6 1017.2 1014.5 1012.9 1013.9 1010.8 1012.7 1016.9 1020.9 1022.8 1022.4 1017.1 MAX. QFE PRESSURE IN HPA 1031.3 1036.1 1032.1 1026.0 1022.4 1023.5 1015.3 1018.3 1029.8 1029.1 1036.3 1042.9 1042.9 DAY 5 7 7 2 13 12 29 5 24 18 26 26 MIN. QFE PRESSURE IN HPA 1011.8 1004.9 1002.8 1005.9 1004.2 1004.6 1005.6 1005.8 1008.4 1015.0 1014.1 1008.3 1002.8 DAY 26 23 5 29 27 19 4 12 3 20 24 10 MEAN QNH PRESSURE IN HPA 1017.1 1017.9 1014.5 1011.7 1010.2 1011.2 1008.1 1010.0 1014.2 1018.1 1020.1 1019.7 1014.4 MAX. QNH PRESSURE IN HPA 1028.6 1033.4 1029.4 1023.3 1019.7 1020.8 1012.6 1015.6 1027.1 1026.4 1033.6 1040.1 1040.1 DAY 5 7 7 2 13 12 29 5 24 18 26 26 MIN. QNH PRESSURE IN HPA 1009.1 1002.2 1000.1 1003.2 1001.5 1001.9 1002.9 1003.1 1005.7 1012.3 1011.4 1005.6 1000.1 DAY 26 23 5 29 27 19 4 12 3 20 24 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1021.0 1017.5 1014.5 1012.7 1013.4 1010.4 1012.4 1016.9 1020.8 1022.9 1023.1 1017.1 MAX. QFE PRESSURE IN HPA 1031.0 1036.0 1031.5 1025.3 1021.8 1023.5 1015.2 1017.9 1030.3 1029.3 1036.4 1043.1 1043.1 DAY 5 7 7 2 13 12 29 5 23 17 26 26 MIN. QFE PRESSURE IN HPA 1011.1 1005.9 1004.8 1006.6 1004.3 1004.1 1004.3 1005.6 1008.5 1013.4 1014.5 1010.8 1004.1 DAY 26 23 30 28 27 19 23 23 3 20 15 9 MEAN QNH PRESSURE IN HPA 1017.3 1018.3 1014.8 1011.8 1010.0 1010.7 1007.7 1009.7 1014.2 1018.1 1020.2 1020.4 1014.4 MAX. QNH PRESSURE IN HPA 1028.3 1033.3 1028.8 1022.6 1019.1 1020.8 1012.5 1015.2 1027.6 1026.6 1033.7 1040.3 1040.3 DAY 5 7 7 2 13 12 29 5 23 17 26 26 MIN. QNH PRESSURE IN HPA 1008.4 1003.2 1002.1 1003.9 1001.6 1001.4 1001.6 1002.9 1005.8 1010.7 1011.8 1008.1 1001.4 DAY 26 23 30 28 27 19 23 23 3 20 15 9 MEAN QFF PRESSURE IN HPA 1017.6 1018.6 1015.1 1012.1 1010.3 1011.1 1008.1 1010.1 1014.6 1018.4 1020.4 1020.6 1014.7 MAX. QFF PRESSURE IN HPA 1028.5 1033.5 1029.0 1022.9 1019.4 1021.1 1012.9 1015.6 1027.9 1026.9 1033.9 1040.5 1040.5 DAY 5 7 7 2 13 12 29 5 23 17 26 26 MIN. QFF PRESSURE IN HPA 1008.7 1003.6 1002.4 1004.2 1002.0 1001.8 1002.0 1003.3 1006.2 1011.0 1012.1 1008.4 1001.8 DAY 26 23 30 28 27 19 23 23 3 20 15 9 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 RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.3 7.6 9.4 12.1 18.2 23.8 24.7 23.8 21.3 16.8 13.8 8.0 15.3 MINIMUN AIR TEMPERATURE (C) -0.9 4.1 7.4 8.4 14.6 20.8 21.6 21.0 18.6 13.7 9.3 4.5 11.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 17 24 20 6 0 0 0 67 DAYS WITH MINIMUM TEMP. <=-4 4 0 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH FREEZING MIN.<= 0 23 2 0 0 0 0 0 0 0 0 0 3 28 TEMPERATURE RECORDS LOWEST(C) -10.0 -3.0 3.0 3.0 9.0 18.0 19.0 19.0 16.0 10.0 1.0 -1.0 -10.0 DAY 20 1 2 15 2 3 3 14 10 17 30 21 MAXIMUM AIR TEMPERATURE (C) 8.2 10.0 11.1 14.8 21.8 27.1 28.4 27.0 24.3 20.8 18.9 12.1 18.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 2 7 2 0 0 1 0 12 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 15.0 13.0 20.0 22.0 25.0 31.0 31.0 30.0 27.0 25.0 30.0 18.0 31.0 DAY 16 2 26 25 11 12 20 4 1 1 21 4 DIF. BETWEEN (MAX.-MIN.) (C) 9.1 5.9 3.7 6.4 7.2 6.3 6.8 6.0 5.7 7.1 9.6 7.6 6.8 MEAN DAILY TEMP. (MDT) (C) 3.7 7.1 9.2 11.6 18.2 24.0 25.0 24.0 21.5 17.3 14.1 8.3 15.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.0 89.0 123.0 94.5 25.5 0.0 0.5 0.0 333.5 HEATING DEG. DAYS(BASE 18 0C) 444.5 317.0 271.5 192.0 25.0 0.0 0.0 0.0 0.5 35.5 122.0 301.5 1709.5 DEWPOINT (MEAN C) 0.7 4.9 7.4 8.8 15.3 19.4 19.7 20.1 18.7 13.3 9.4 4.7 11.9 MIXING RATIO (G/KG) 4.02 5.38 6.41 7.12 10.93 14.32 14.54 14.92 13.53 9.54 7.57 5.34 9.47 VAPOUR PRESSURE (HPA) 6.60 8.75 10.40 11.51 17.54 22.77 23.09 23.68 21.66 15.47 12.25 8.74 15.20 SATURATION DEF. (HPA) 1.90 1.79 1.50 2.95 3.76 6.90 8.32 6.14 3.93 3.92 4.00 2.28 3.95 RELATIVE HUMIDITY (MEAN %) 79 84 88 82 84 78 75 81 86 81 77 81 81 RELATIVE HUMIDITY (MAX. %) 91 93 95 93 94 89 87 91 95 92 90 91 92 RELATIVE HUMIDITY (MIN. %) 67 76 82 72 72 64 61 69 75 66 61 66 69 RELATIVE HUMIDITY (MEAN% 03UTC) 85 92 93 92 89 84 78 85 91 86 83 85 87 RELATIVE HUMIDITY (MEAN% 09UTC) 74 78 85 76 76 70 66 73 77 70 68 69 74 RELATIVE HUMIDITY (MEAN% 15UTC) 87 85 89 81 80 75 73 80 86 85 83 86 83 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 142.0 51.2 58.1 123.6 16.1 27.9 58.3 121.3 116.8 106.4 130.4 121.6 1073.7 DAYS WITH PRECIPITATION >=10 5 2 1 5 1 1 1 2 3 4 4 4 33 DAYS WITH PRECIPITATION >= 5 7 3 5 7 1 3 1 7 3 6 4 8 55 DAYS WITH PRECIPITATION >= 1 10 9 16 14 3 5 4 11 9 9 6 12 108 DAYS WITH PRECIPITATION 11 11 22 18 6 8 6 12 12 13 8 13 140 GREATEST DAILY PRECIPITATION 45.0 22.0 11.0 24.0 10.0 13.0 51.0 49.0 45.0 34.0 54.0 33.0 54.0 DAY 29 26 14 9 1 17 27 6 16 6 11 25 DAY WITH THUNDER STORM 0 0 0 2 1 4 0 3 0 0 2 0 12 DAYS WITH SNOW OR SLEET 3 0 0 0 0 0 0 0 0 0 0 1 4 DAYS WITH DUST 0 0 0 0 0 1 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 315 90 90 90 90 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 6.5 8.6 6.4 5.2 5.3 5.6 3.1 2.5 3.2 3.6 4.0 3.1 3.7 PREVAILING WIND PERCENT 27.1 28.3 31.6 42.7 33.7 26.8 30.2 29.4 31.3 30.0 28.5 51.0 26.4 CALMS PERCENT OF WIND 15.5 4.1 9.7 7.3 12.8 13.0 14.5 12.5 17.1 9.7 5.9 2.0 10.5 NO. OF WIND OBSERVATION 155 145 155 150 243 239 248 248 240 247 239 247 2556 VECTOR WIND DIRECTION (MEAN) 291 331 16 46 53 54 307 296 293 275 263 263 308 VECTOR WIND MAGNITUDE(KNOTS) 2.7 1.7 0.9 1.1 0.9 0.6 2.1 1.3 1.3 1.1 0.9 2.0 1.0 WIND STEADINESES (MEAN %) 62.8 26.6 16.4 24.4 21.4 16.2 52.5 39.4 43.3 32.4 22.5 55.6 23.8 WIND SPEED (MEAN KNOTS) 4.3 6.4 5.5 4.5 4.2 3.7 4.0 3.3 3.0 3.4 4.0 3.6 4.2 FASTEST WIND DIRECTION 300 290 270 300 300 300 300 310 300 290 290 300 300 FASTEST WIND SPEED (KNOTS) 35 25 30 25 20 30 25 17 18 35 30 14 35 DAY 18 25 3 29 22 12 5 14 8 3 26 16 DAYS WITH SKY CLEAR (0-2)/8 11 2 1 6 14 6 8 8 7 10 10 10 93 DAYS WITH P.CLOUDY (3-6)/8 9 9 3 4 10 14 13 8 7 10 12 7 106 DAYS WITH CLOUDY (7-8)/8 11 18 27 20 7 10 10 15 16 11 8 14 167 DAYS WITH VISIBILITY =< 2 KM 3 0 0 1 0 0 0 3 4 0 3 1 15 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1027.0 1021.5 1019.6 1017.2 1015.9 1012.0 1011.5 1011.5 1017.9 1025.0 1019.9 1027.9 1018.9 MAX. QFE PRESSURE IN HPA 1039.4 1035.5 1032.5 1026.0 1021.2 1018.2 1020.0 1019.2 1030.1 1035.9 1037.6 1040.9 1040.9 DAY-HOUR 30- 6 27- 6 8- 3 24- 6 1-18 1- 6 22- 6 20-18 16-18 29- 6 10-18 25-18 MIN. QFE PRESSURE IN HPA 1011.2 1010.9 1008.0 996.6 1002.4 1002.6 1003.7 1000.3 1008.8 1009.9 997.0 1011.6 996.6 DAY-HOUR 16- 3 2- 3 3- 3 6-12 11-12 15-12 4-15 13-15 11- 0 2-15 27- 9 23-12 MEAN QNH PRESSURE IN HPA 1024.2 1018.8 1016.9 1014.5 1013.2 1009.3 1008.8 1008.8 1015.2 1022.2 1017.2 1025.1 1016.2 MAX. QNH PRESSURE IN HPA 1036.6 1032.8 1029.8 1023.3 1018.5 1015.5 1017.3 1016.5 1027.4 1033.2 1034.9 1038.1 1038.1 DAY-HOUR 30- 6 27- 6 8- 3 24- 6 1-18 1- 6 22- 6 20-18 16-18 29- 6 10-18 25-18 MIN. QNH PRESSURE IN HPA 1008.5 1008.2 1005.3 993.9 999.7 999.9 1001.0 997.6 1006.1 1007.2 994.3 1008.9 993.9 DAY-HOUR 16- 3 2- 3 3- 3 6-12 11-12 15-12 4-15 13-15 11- 0 2-15 27- 9 23-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.5 1009.6 1009.2 1009.1 1015.6 1022.5 1017.5 1025.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1018.8 1015.9 1017.7 1016.8 1027.7 1033.4 1035.1 1038.3 ****** DAY-HOUR **-** **-** **-** **-** 1-18 1- 6 22- 6 20-18 16-18 29- 6 10-18 25-18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1000.1 1000.3 1001.4 998.0 1006.5 1007.6 994.7 1009.2 ****** DAY-HOUR **-** **-** **-** **-** 11-12 15-12 4-15 13-15 11- 0 2-15 27- 9 23-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 1015.5 1011.9 1011.4 1011.4 1017.7 1024.3 1019.6 1027.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 1020.4 1017.1 1019.2 1018.3 1028.7 1034.3 1036.0 1039.4 ****** DAY ** ** ** ** 2 1 23 21 17 29 11 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 1008.2 1005.2 1004.7 1003.2 1008.8 1010.3 998.3 1013.5 ****** DAY ** ** ** ** 11 15 5 13 11 5 27 24 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1012.8 1009.2 1008.7 1008.7 1015.0 1021.6 1016.9 1025.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1017.7 1014.4 1016.5 1015.6 1026.0 1031.6 1033.3 1036.6 ****** DAY ** ** ** ** 2 1 23 21 17 29 11 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1005.5 1002.5 1002.0 1000.5 1006.1 1007.6 995.6 1010.8 ****** DAY ** ** ** ** 11 15 5 13 11 5 27 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.2 1009.6 1009.1 1009.1 1015.4 1021.9 1017.2 1025.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1018.0 1014.8 1016.9 1015.9 1026.3 1031.8 1033.5 1036.8 ****** DAY ** ** ** ** 2 1 23 21 17 29 11 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.9 1002.9 1002.4 1000.9 1006.5 1007.9 996.0 1011.1 ****** DAY ** ** ** ** 11 15 5 13 11 5 27 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1026.6 1021.6 1019.4 1017.2 1016.2 1012.5 1012.0 1011.9 1018.2 1024.8 1020.1 1027.9 1019.0 MAX. QFE PRESSURE IN HPA 1038.9 1033.8 1032.5 1024.8 1020.6 1017.8 1019.5 1018.4 1029.4 1034.8 1036.1 1039.5 1039.5 DAY 30 27 8 23 2 1 23 21 16 29 11 26 MIN. QFE PRESSURE IN HPA 1011.2 1010.9 1008.0 1002.3 1008.0 1005.5 1007.0 1002.9 1009.7 1012.5 997.5 1013.6 997.5 DAY 16 2 3 6 11 15 19 13 11 5 27 24 MEAN QNH PRESSURE IN HPA 1023.9 1018.9 1016.7 1014.5 1013.5 1009.8 1009.3 1009.2 1015.5 1022.1 1017.4 1025.2 1016.3 MAX. QNH PRESSURE IN HPA 1036.2 1031.1 1029.8 1022.1 1017.9 1015.1 1016.8 1015.7 1026.7 1032.1 1033.4 1036.7 1036.7 DAY 30 27 8 23 2 1 23 21 16 29 11 26 MIN. QNH PRESSURE IN HPA 1008.5 1008.2 1005.3 999.6 1005.3 1002.8 1004.3 1000.2 1007.0 1009.8 994.8 1010.9 994.8 DAY 16 2 3 6 11 15 19 13 11 5 27 24 MEAN QFF PRESSURE IN HPA 1024.1 1019.1 1017.0 1014.8 1013.9 1010.2 1009.7 1009.6 1015.9 1022.4 1017.7 1025.4 1016.6 MAX. QFF PRESSURE IN HPA 1036.3 1031.3 1030.0 1022.3 1018.2 1015.5 1017.2 1016.0 1027.0 1032.3 1033.6 1036.9 1036.9 DAY 30 27 8 24 2 1 23 21 16 29 11 26 MIN. QFF PRESSURE IN HPA 1008.7 1008.4 1005.6 999.9 1005.7 1003.2 1004.7 1000.6 1007.4 1010.1 995.1 1011.2 995.1 DAY 16 2 3 6 11 15 19 13 11 5 27 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1027.7 1022.4 1020.2 1017.6 1016.8 1012.7 1012.3 1012.2 1018.8 1025.8 1020.9 1028.9 1019.7 MAX. QFE PRESSURE IN HPA 1039.4 1035.5 1032.2 1026.0 1020.7 1018.2 1020.0 1018.6 1030.0 1035.9 1036.8 1039.7 1039.7 DAY 30 27 8 24 2 1 22 21 16 29 11 26 MIN. QFE PRESSURE IN HPA 1011.4 1011.9 1009.0 1000.6 1006.8 1005.1 1007.0 1002.6 1010.1 1014.5 997.4 1013.4 997.4 DAY 16 2 3 6 11 15 19 13 11 2 27 23 MEAN QNH PRESSURE IN HPA 1025.0 1019.6 1017.5 1014.9 1014.1 1010.0 1009.6 1009.5 1016.1 1023.1 1018.2 1026.1 1017.0 MAX. QNH PRESSURE IN HPA 1036.6 1032.8 1029.5 1023.3 1018.0 1015.5 1017.3 1015.9 1027.3 1033.2 1034.1 1036.9 1036.9 DAY 30 27 8 24 2 1 22 21 16 29 11 26 MIN. QNH PRESSURE IN HPA 1008.7 1009.2 1006.3 997.9 1004.1 1002.4 1004.3 999.9 1007.4 1011.8 994.7 1010.7 994.7 DAY 16 2 3 6 11 15 19 13 11 2 27 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1014.5 1010.4 1010.0 1009.9 1016.5 1023.4 1018.5 1026.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1018.3 1015.9 1017.7 1016.3 1027.6 1033.4 1034.3 1037.1 ****** DAY ** ** ** ** 2 1 22 31 16 29 11 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.5 1002.8 1004.7 1000.3 1007.8 1012.2 995.1 1010.9 ****** DAY ** ** ** ** 11 15 19 13 11 2 27 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1027.0 1021.7 1019.9 1017.5 1016.5 1012.4 1011.9 1011.6 1018.3 1025.4 1020.0 1027.9 1019.2 MAX. QFE PRESSURE IN HPA 1037.0 1034.7 1030.5 1025.9 1020.7 1018.2 1019.4 1017.8 1029.7 1035.0 1035.9 1038.3 1038.3 DAY 21 27 8 24 13 1 22 6 16 29 11 26 MIN. QFE PRESSURE IN HPA 1011.6 1011.7 1010.5 998.8 1003.9 1004.3 1006.4 1001.4 1010.3 1013.0 997.0 1011.7 997.0 DAY 18 2 3 6 11 15 2 13 11 2 27 23 MEAN QNH PRESSURE IN HPA 1024.3 1019.0 1017.2 1014.8 1013.8 1009.7 1009.2 1008.9 1015.6 1022.7 1017.3 1025.2 1016.5 MAX. QNH PRESSURE IN HPA 1034.3 1032.0 1027.8 1023.2 1018.0 1015.5 1016.7 1015.1 1027.0 1032.3 1033.2 1035.6 1035.6 DAY 21 27 8 24 13 1 22 6 16 29 11 26 MIN. QNH PRESSURE IN HPA 1008.9 1009.0 1007.8 996.1 1001.2 1001.6 1003.7 998.7 1007.6 1010.3 994.3 1009.0 994.3 DAY 18 2 3 6 11 15 2 13 11 2 27 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1014.1 1009.9 1009.7 1009.3 1015.9 1022.8 1017.1 1025.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1018.3 1014.1 1017.1 1015.5 1027.3 1032.5 1033.4 1035.7 ****** DAY ** ** ** ** 13 2 22 6 16 29 11 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1001.6 1002.0 1004.1 999.1 1008.0 1010.7 994.7 1009.3 ****** DAY ** ** ** ** 11 15 2 13 11 2 27 23 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1026.5 1020.8 1019.2 1016.8 1015.4 1011.7 1011.1 1010.8 1017.4 1024.7 1019.6 1027.4 1018.4 MAX. QFE PRESSURE IN HPA 1037.8 1033.6 1029.2 1025.8 1020.7 1017.7 1017.9 1017.5 1028.6 1034.2 1035.3 1037.1 1037.8 DAY 21 27 8 23 13 1 22 20 16 29 11 26 MIN. QFE PRESSURE IN HPA 1011.9 1011.8 1009.5 996.6 1002.4 1002.6 1005.0 1000.6 1010.3 1010.6 1000.7 1011.6 996.6 DAY 18 2 26 6 11 15 4 13 11 2 26 23 MEAN QNH PRESSURE IN HPA 1023.8 1018.1 1016.5 1014.1 1012.7 1009.0 1008.4 1008.1 1014.6 1022.0 1016.9 1024.6 1015.7 MAX. QNH PRESSURE IN HPA 1035.1 1030.9 1026.5 1023.1 1018.0 1015.0 1015.2 1014.8 1025.9 1031.5 1032.6 1034.4 1035.1 DAY 21 27 8 23 13 1 22 20 16 29 11 26 MIN. QNH PRESSURE IN HPA 1009.2 1009.1 1006.8 993.9 999.7 999.9 1002.3 997.9 1007.6 1007.9 998.0 1008.9 993.9 DAY 18 2 26 6 11 15 4 13 11 2 26 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.9 1009.4 1008.8 1008.5 1015.0 1022.3 1017.2 1024.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1018.3 1015.4 1015.6 1015.2 1026.2 1031.7 1032.8 1034.5 ****** DAY ** ** ** ** 13 1 22 20 16 29 11 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1000.1 1000.3 1002.7 998.3 1008.0 1008.3 998.3 1009.2 ****** DAY ** ** ** ** 11 15 4 13 11 2 26 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1027.1 1021.3 1019.4 1016.9 1015.0 1011.2 1010.6 1010.6 1017.2 1024.9 1020.0 1027.7 1018.5 MAX. QFE PRESSURE IN HPA 1039.0 1033.3 1029.0 1025.6 1020.5 1016.8 1018.7 1017.7 1028.6 1034.1 1036.3 1038.8 1039.0 DAY 21 27 8 23 13 1 22 20 16 29 10 25 MIN. QFE PRESSURE IN HPA 1013.6 1011.9 1009.2 1003.5 1005.1 1003.6 1003.7 1000.3 1010.5 1009.9 999.2 1012.4 999.2 DAY 18 2 26 6 11 15 4 13 10 2 26 23 MEAN QNH PRESSURE IN HPA 1024.4 1018.5 1016.7 1014.2 1012.3 1008.5 1007.9 1007.9 1014.5 1022.2 1017.3 1024.9 1015.8 MAX. QNH PRESSURE IN HPA 1036.2 1030.6 1026.3 1022.9 1017.8 1014.1 1016.0 1015.0 1025.9 1031.4 1033.6 1036.1 1036.2 DAY 21 27 8 23 13 1 22 20 16 29 10 25 MIN. QNH PRESSURE IN HPA 1010.9 1009.2 1006.5 1000.8 1002.4 1000.9 1001.0 997.6 1007.8 1007.2 996.5 1009.7 996.5 DAY 18 2 26 6 11 15 4 13 10 2 26 23 MEAN QFF PRESSURE IN HPA 1024.6 1018.8 1016.9 1014.5 1012.7 1008.9 1008.3 1008.3 1014.9 1022.5 1017.6 1025.2 1016.1 MAX. QFF PRESSURE IN HPA 1036.4 1030.8 1026.5 1023.1 1018.1 1014.5 1016.4 1015.4 1026.2 1031.6 1033.8 1036.2 1036.4 DAY 21 27 8 23 13 1 22 20 16 29 10 25 MIN. QFF PRESSURE IN HPA 1011.1 1009.4 1006.8 1001.1 1002.8 1001.3 1001.4 998.0 1008.2 1007.6 996.8 1010.0 996.8 DAY 18 2 26 6 11 15 4 13 10 2 26 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 1015.9 1011.9 1011.4 1011.5 1018.0 1025.2 1020.0 1028.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 1021.2 1017.1 1019.9 1019.2 1030.1 1034.3 1037.6 1040.9 ****** DAY ** ** ** ** 1 1 22 20 16 29 10 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 1008.5 1005.5 1004.1 1003.1 1010.1 1010.1 998.6 1013.6 ****** DAY ** ** ** ** 11 14 4 12 10 2 26 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1013.2 1009.2 1008.7 1008.8 1015.3 1022.5 1017.3 1025.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.5 1014.4 1017.2 1016.5 1027.4 1031.6 1034.9 1038.1 ****** DAY ** ** ** ** 1 1 22 20 16 29 10 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1005.8 1002.8 1001.4 1000.4 1007.4 1007.4 995.9 1010.9 ****** DAY ** ** ** ** 11 14 4 12 10 2 26 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.6 1009.6 1009.1 1009.2 1015.7 1022.8 1017.6 1025.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1018.8 1014.8 1017.6 1016.8 1027.7 1031.8 1035.1 1038.3 ****** DAY ** ** ** ** 1 1 22 20 16 29 10 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1006.2 1003.2 1001.8 1000.8 1007.8 1007.8 996.2 1011.2 ****** DAY ** ** ** ** 11 14 4 12 10 2 26 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 1015.6 1011.7 1011.3 1011.6 1018.0 1024.6 1019.3 1027.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 1020.9 1016.5 1019.7 1018.9 1029.3 1034.3 1036.8 1039.8 ****** DAY ** ** ** ** 1 1 22 20 16 28 10 25 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 1010.0 1004.3 1003.8 1003.4 1009.2 1010.4 998.0 1013.1 ****** DAY ** ** ** ** 10 14 4 12 10 2 26 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1012.9 1009.0 1008.6 1008.9 1015.2 1021.9 1016.5 1024.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.2 1013.8 1017.0 1016.2 1026.6 1031.6 1034.1 1037.0 ****** DAY ** ** ** ** 1 1 22 20 16 28 10 25 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1007.3 1001.6 1001.1 1000.7 1006.5 1007.7 995.3 1010.4 ****** DAY ** ** ** ** 10 14 4 12 10 2 26 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.3 1009.4 1009.0 1009.3 1015.6 1022.0 1016.8 1025.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1018.5 1014.2 1017.4 1016.5 1026.9 1031.8 1034.3 1037.2 ****** DAY ** ** ** ** 1 1 22 20 16 28 10 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1007.7 1002.0 1001.5 1001.1 1006.9 1008.1 995.7 1010.7 ****** DAY ** ** ** ** 10 14 4 12 10 2 26 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.1 7.7 8.6 11.5 17.7 23.1 24.9 24.9 22.1 16.7 13.6 11.0 15.6 MINIMUN AIR TEMPERATURE (C) 3.1 3.5 5.9 8.6 14.1 19.6 21.6 22.2 19.2 14.2 9.7 6.7 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 9 25 27 7 0 0 0 68 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 5 4 0 0 0 0 0 0 0 0 0 0 9 TEMPERATURE RECORDS LOWEST(C) -3.0 -1.0 1.0 2.0 9.0 16.0 19.0 20.0 16.0 9.0 5.0 1.0 -3.0 DAY 6 4 17 10 5 27 7 8 23 26 12 23 MAXIMUM AIR TEMPERATURE (C) 9.5 12.1 11.3 14.6 21.2 26.6 28.5 28.2 25.5 19.9 17.9 15.6 19.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 1 12 5 0 0 0 0 19 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.0 20.0 18.0 25.0 32.0 30.0 32.0 31.0 28.0 26.0 26.0 23.0 32.0 DAY 6 9 31 28 16 8 17 5 1 7 27 14 DIF. BETWEEN (MAX.-MIN.) (C) 6.4 8.6 5.4 6.0 7.1 7.0 6.9 6.0 6.3 5.7 8.2 8.9 6.8 MEAN DAILY TEMP. (MDT) (C) 6.3 7.8 8.6 11.6 17.7 23.1 25.1 25.2 22.3 17.1 13.8 11.2 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.5 64.0 126.5 131.0 49.0 1.5 0.0 0.0 375.5 HEATING DEG. DAYS(BASE 18 0C) 363.0 286.5 291.0 194.5 38.5 0.0 0.0 0.0 0.5 54.0 126.5 212.0 1566.5 DEWPOINT (MEAN C) 3.5 4.3 6.7 9.3 14.9 19.3 21.2 21.7 18.6 14.6 11.0 7.3 12.7 MIXING RATIO (G/KG) 4.87 5.21 6.12 7.38 10.63 14.13 15.95 16.43 13.44 10.52 8.22 6.43 9.94 VAPOUR PRESSURE (HPA) 7.94 8.46 9.95 11.91 17.06 22.53 25.29 26.08 21.53 16.95 13.30 10.44 15.95 SATURATION DEF. (HPA) 1.57 2.33 1.39 1.93 3.49 5.91 6.45 5.67 5.35 2.48 2.56 2.98 3.51 RELATIVE HUMIDITY (MEAN %) 85 81 88 88 85 80 81 83 81 88 86 79 84 RELATIVE HUMIDITY (MAX. %) 94 94 96 97 95 92 93 94 93 96 97 93 95 RELATIVE HUMIDITY (MIN. %) 73 63 77 73 72 67 68 71 70 76 70 61 70 RELATIVE HUMIDITY (MEAN% 03UTC) 89 85 93 90 90 86 85 89 87 92 90 84 88 RELATIVE HUMIDITY (MEAN% 09UTC) 76 77 82 82 78 71 72 75 72 79 76 68 76 RELATIVE HUMIDITY (MEAN% 15UTC) 87 81 88 87 81 77 77 80 83 92 93 85 84 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 94.9 31.6 71.4 72.0 35.8 39.2 35.5 104.2 130.8 198.0 118.2 56.0 987.6 DAYS WITH PRECIPITATION >=10 2 1 2 1 1 2 1 2 2 4 3 2 23 DAYS WITH PRECIPITATION >= 5 6 2 4 4 2 2 3 2 4 7 5 3 44 DAYS WITH PRECIPITATION >= 1 9 6 12 14 8 5 8 5 11 20 9 6 113 DAYS WITH PRECIPITATION 14 10 15 16 14 12 14 8 14 23 11 8 159 GREATEST DAILY PRECIPITATION 45.0 17.0 20.3 24.0 16.0 21.0 10.0 88.0 87.0 60.0 41.2 23.0 88.0 DAY 24 13 12 15 4 16 11 8 19 26 10 29 DAY WITH THUNDER STORM 0 0 1 2 7 6 6 0 5 4 0 2 33 DAYS WITH SNOW OR SLEET 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 1 2 WIND DIRECTION (PREVAILING) 270 135 90 315 315 360 270 270 225 315 225 225 315 PREVAILING WIND SPEED(KNOTS) 2.6 3.5 5.9 9.4 9.0 7.1 3.7 5.3 3.4 9.3 2.8 2.9 8.2 PREVAILING WIND PERCENT 39.7 16.1 19.0 23.8 18.6 22.2 19.8 10.9 20.9 21.1 15.1 13.8 13.3 CALMS PERCENT OF WIND 2.0 14.8 19.4 25.1 17.8 27.6 26.7 35.6 19.2 31.2 42.3 33.2 24.6 NO. OF WIND OBSERVATION 247 223 247 239 247 239 247 247 239 247 239 247 2908 VECTOR WIND DIRECTION (MEAN) 252 309 20 340 351 359 345 332 295 301 288 272 321 VECTOR WIND MAGNITUDE(KNOTS) 2.0 0.5 1.2 1.7 2.1 2.2 1.1 1.1 1.8 2.6 0.8 0.6 1.2 WIND STEADINESES (MEAN %) 55.6 12.5 29.3 37.8 46.7 56.4 32.4 31.4 45.0 60.5 32.0 19.4 31.6 WIND SPEED (MEAN KNOTS) 3.6 4.0 4.1 4.5 4.5 3.9 3.4 3.5 4.0 4.3 2.5 3.1 3.8 FASTEST WIND DIRECTION 240 330 320 300 310 270 360 310 300 300 290 260 310 FASTEST WIND SPEED (KNOTS) 18 20 24 34 25 20 25 40 21 27 40 21 40 DAY 9 9 8 3 16 15 30 26 1 19 30 20 DAYS WITH SKY CLEAR (0-2)/8 5 9 1 4 7 11 8 8 5 2 11 11 82 DAYS WITH P.CLOUDY (3-6)/8 8 9 9 5 13 10 11 10 8 9 10 10 112 DAYS WITH CLOUDY (7-8)/8 18 10 21 21 11 9 12 13 17 20 9 10 171 DAYS WITH VISIBILITY =< 2 KM 0 3 4 5 2 0 0 0 2 0 2 0 18 DURATION OF SUNSHINE HOURS ****** 109.2 83.5 80.9 200.8 220.9 175.5 121.0 79.8 51.6 149.4 148.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1023.3 1018.7 1023.2 1016.3 1016.5 1014.1 1011.7 1014.1 1019.0 1020.1 1020.1 1020.5 1018.1 MAX. QFE PRESSURE IN HPA 1036.0 1032.6 1039.4 1030.2 1030.7 1022.1 1017.8 1026.2 1026.7 1032.6 1030.9 1035.8 1039.4 DAY-HOUR 29- 6 16- 9 14-18 9- 6 20- 6 2- 6 1- 6 8-18 30-18 28- 6 19- 9 22- 6 MIN. QFE PRESSURE IN HPA 1007.3 996.5 1006.3 998.1 1004.9 1004.3 1004.9 1007.2 1013.0 1006.8 1005.2 1008.0 996.5 DAY-HOUR 11-12 23- 0 31-15 3-18 16- 0 15-12 11-15 26-12 16-15 25-12 17-18 14- 3 MEAN QNH PRESSURE IN HPA 1020.6 1016.0 1020.5 1013.5 1013.7 1011.3 1009.0 1011.3 1016.2 1017.4 1017.4 1017.8 1015.4 MAX. QNH PRESSURE IN HPA 1033.3 1029.9 1036.6 1027.5 1028.0 1019.4 1015.1 1023.5 1024.0 1029.9 1028.2 1033.1 1036.6 DAY-HOUR 29- 6 16- 9 14-18 9- 6 20- 6 2- 6 1- 6 8-18 30-18 28- 6 19- 9 22- 6 MIN. QNH PRESSURE IN HPA 1004.6 993.8 1003.6 995.4 1002.2 1001.6 1002.2 1004.5 1010.3 1004.1 1002.5 1005.3 993.8 DAY-HOUR 11-12 23- 0 31-15 3-18 16- 0 15-12 11-15 26-12 16-15 25-12 17-18 14- 3 MEAN QFF PRESSURE IN HPA 1020.8 1016.2 1020.7 1013.8 1014.1 1011.7 1009.4 1011.8 1016.6 1017.7 1017.6 1018.1 1015.7 MAX. QFF PRESSURE IN HPA 1033.5 1030.1 1036.9 1027.7 1028.3 1019.8 1015.5 1023.8 1024.3 1030.1 1028.4 1033.3 1036.9 DAY-HOUR 29- 6 16- 9 14-18 9- 6 20- 6 2- 6 1- 6 8-18 30-18 28- 6 19- 9 22- 6 MIN. QFF PRESSURE IN HPA 1004.8 994.1 1003.9 995.7 1002.6 1002.0 1002.6 1004.9 1010.7 1004.4 1002.9 1005.6 994.1 DAY-HOUR 11-12 23- 0 31-15 3-18 16- 0 15-12 11-15 26-15 16-15 25-18 17-18 14- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1023.1 1018.3 1022.9 1015.7 1016.1 1013.6 1011.5 1013.7 1018.6 1019.5 1020.0 1020.0 1017.8 MAX. QFE PRESSURE IN HPA 1035.5 1032.2 1039.1 1026.9 1029.6 1020.6 1016.4 1024.6 1024.9 1030.2 1029.4 1035.3 1039.1 DAY 31 1 15 9 20 2 24 9 20 29 28 22 MIN. QFE PRESSURE IN HPA 1008.9 996.5 1012.5 998.3 1004.9 1008.3 1005.8 1008.1 1014.9 1008.2 1009.4 1008.3 996.5 DAY 8 23 24 4 16 15 29 14 17 25 17 14 MEAN QNH PRESSURE IN HPA 1020.3 1015.6 1020.2 1013.0 1013.4 1010.9 1008.8 1011.0 1015.9 1016.8 1017.2 1017.3 1015.0 MAX. QNH PRESSURE IN HPA 1032.8 1029.5 1036.3 1024.2 1026.9 1017.9 1013.7 1021.9 1022.2 1027.5 1026.7 1032.6 1036.3 DAY 31 1 15 9 20 2 24 9 20 29 28 22 MIN. QNH PRESSURE IN HPA 1006.2 993.8 1009.8 995.6 1002.2 1005.6 1003.1 1005.4 1012.2 1005.5 1006.7 1005.6 993.8 DAY 8 23 24 4 16 15 29 14 17 25 17 14 MEAN QFF PRESSURE IN HPA 1020.6 1015.9 1020.5 1013.3 1013.7 1011.3 1009.2 1011.4 1016.2 1017.2 1017.5 1017.6 1015.4 MAX. QFF PRESSURE IN HPA 1033.0 1029.7 1036.6 1024.4 1027.2 1018.3 1014.1 1022.2 1022.5 1027.7 1027.0 1032.8 1036.6 DAY 31 1 15 9 20 2 24 9 20 29 28 22 MIN. QFF PRESSURE IN HPA 1006.5 994.1 1010.1 995.9 1002.6 1006.0 1003.5 1005.8 1012.6 1005.8 1007.0 1005.9 994.1 DAY 8 23 24 4 16 15 29 14 17 25 17 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1023.3 1018.9 1023.2 1016.3 1016.6 1014.5 1012.1 1014.6 1019.1 1020.1 1020.4 1020.6 1018.3 MAX. QFE PRESSURE IN HPA 1035.3 1031.8 1038.2 1028.1 1030.3 1021.5 1017.4 1025.2 1025.7 1031.0 1030.1 1034.8 1038.2 DAY 31 1 15 9 20 2 1 9 30 28 28 22 MIN. QFE PRESSURE IN HPA 1008.9 999.5 1013.2 999.7 1006.3 1007.6 1006.1 1010.1 1015.2 1008.8 1009.4 1008.0 999.5 DAY 8 23 8 4 2 15 29 31 13 25 17 14 MEAN QNH PRESSURE IN HPA 1020.6 1016.2 1020.5 1013.6 1013.9 1011.8 1009.5 1011.9 1016.4 1017.4 1017.7 1017.9 1015.6 MAX. QNH PRESSURE IN HPA 1032.6 1029.1 1035.5 1025.4 1027.6 1018.8 1014.7 1022.5 1023.0 1028.3 1027.4 1032.1 1035.5 DAY 31 1 15 9 20 2 1 9 30 28 28 22 MIN. QNH PRESSURE IN HPA 1006.2 996.8 1010.5 997.0 1003.6 1004.9 1003.4 1007.4 1012.5 1006.1 1006.7 1005.3 996.8 DAY 8 23 8 4 2 15 29 31 13 25 17 14 MEAN QFF PRESSURE IN HPA 1020.8 1016.4 1020.7 1013.9 1014.2 1012.2 1009.8 1012.3 1016.8 1017.7 1018.0 1018.2 1015.9 MAX. QFF PRESSURE IN HPA 1032.8 1029.3 1035.7 1025.6 1027.9 1019.1 1015.1 1022.8 1023.3 1028.5 1027.7 1032.3 1035.7 DAY 31 1 15 9 20 2 1 9 30 28 28 22 MIN. QFF PRESSURE IN HPA 1006.4 997.1 1010.8 997.3 1003.9 1005.3 1003.8 1007.8 1012.9 1006.4 1007.0 1005.6 997.1 DAY 8 23 8 4 2 15 29 31 13 25 17 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1024.2 1019.7 1024.0 1017.0 1017.0 1014.9 1012.4 1015.1 1019.8 1021.0 1021.4 1021.8 1019.0 MAX. QFE PRESSURE IN HPA 1036.0 1031.9 1038.7 1030.2 1030.7 1022.1 1017.8 1025.5 1026.5 1032.6 1030.7 1035.8 1038.7 DAY 29 1 15 9 20 2 1 8 30 28 28 22 MIN. QFE PRESSURE IN HPA 1008.6 1000.7 1013.2 1003.3 1006.4 1006.2 1006.5 1010.2 1016.0 1009.7 1010.4 1009.4 1000.7 DAY 11 9 8 4 16 15 11 30 9 25 17 14 MEAN QNH PRESSURE IN HPA 1021.5 1017.0 1021.3 1014.2 1014.3 1012.2 1009.7 1012.4 1017.1 1018.3 1018.7 1019.1 1016.3 MAX. QNH PRESSURE IN HPA 1033.3 1029.2 1036.0 1027.5 1028.0 1019.4 1015.1 1022.8 1023.8 1029.9 1028.0 1033.1 1036.0 DAY 29 1 15 9 20 2 1 8 30 28 28 22 MIN. QNH PRESSURE IN HPA 1005.9 998.0 1010.5 1000.6 1003.7 1003.5 1003.8 1007.5 1013.3 1007.0 1007.7 1006.7 998.0 DAY 11 9 8 4 16 15 11 30 9 25 17 14 MEAN QFF PRESSURE IN HPA 1021.7 1017.2 1021.5 1014.5 1014.7 1012.6 1010.1 1012.8 1017.5 1018.6 1019.0 1019.4 1016.6 MAX. QFF PRESSURE IN HPA 1033.5 1029.4 1036.2 1027.7 1028.3 1019.8 1015.5 1023.1 1024.1 1030.1 1028.3 1033.3 1036.2 DAY 29 1 15 9 20 2 1 8 30 28 28 22 MIN. QFF PRESSURE IN HPA 1006.1 998.3 1010.8 1000.9 1004.1 1003.9 1004.2 1007.9 1013.7 1007.3 1008.0 1007.0 998.3 DAY 11 9 8 4 16 15 11 30 9 25 17 14 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1023.4 1019.1 1023.3 1016.7 1016.8 1014.6 1012.1 1014.7 1019.3 1020.3 1020.4 1020.9 1018.5 MAX. QFE PRESSURE IN HPA 1035.9 1032.6 1037.9 1029.2 1029.8 1021.4 1017.5 1026.1 1026.2 1032.5 1030.9 1034.6 1037.9 DAY 29 16 16 9 20 2 1 8 30 28 19 22 MIN. QFE PRESSURE IN HPA 1007.5 999.9 1011.5 1005.3 1005.9 1005.6 1006.3 1008.7 1015.6 1008.4 1007.7 1008.4 999.9 DAY 11 9 8 3 16 15 11 26 24 25 17 14 MEAN QNH PRESSURE IN HPA 1020.7 1016.4 1020.6 1014.0 1014.1 1011.9 1009.4 1012.0 1016.6 1017.6 1017.6 1018.2 1015.8 MAX. QNH PRESSURE IN HPA 1033.2 1029.9 1035.2 1026.5 1027.1 1018.7 1014.8 1023.4 1023.5 1029.8 1028.2 1031.9 1035.2 DAY 29 16 16 9 20 2 1 8 30 28 19 22 MIN. QNH PRESSURE IN HPA 1004.8 997.2 1008.8 1002.6 1003.2 1002.9 1003.6 1006.0 1012.9 1005.7 1005.0 1005.7 997.2 DAY 11 9 8 3 16 15 11 26 24 25 17 14 MEAN QFF PRESSURE IN HPA 1020.8 1016.2 1021.1 1014.5 1014.7 1012.1 1009.7 1012.4 1017.0 1017.8 1017.9 1018.3 1016.0 MAX. QFF PRESSURE IN HPA 1033.4 1030.1 1035.4 1026.7 1027.4 1019.1 1014.1 1023.7 1023.8 1030.0 1028.4 1032.1 1035.4 DAY 29 16 16 9 20 2 25 8 30 28 19 22 MIN. QFF PRESSURE IN HPA 1005.0 997.5 1009.1 1002.9 1003.6 1003.3 1004.0 1006.4 1013.3 1006.0 1005.3 1006.0 997.5 DAY 11 9 8 3 16 15 11 26 24 25 17 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1022.8 1018.2 1022.4 1015.7 1016.0 1013.7 1011.4 1013.7 1018.5 1019.6 1019.3 1020.1 1017.6 MAX. QFE PRESSURE IN HPA 1034.8 1031.2 1036.8 1027.9 1028.9 1020.4 1016.5 1025.4 1026.2 1031.4 1029.1 1032.2 1036.8 DAY 30 16 14 9 19 2 1 8 30 28 19 22 MIN. QFE PRESSURE IN HPA 1007.3 1000.3 1009.0 1001.3 1006.6 1004.3 1005.2 1007.2 1014.1 1006.8 1006.4 1008.0 1000.3 DAY 11 9 31 3 16 15 20 26 16 25 17 14 MEAN QNH PRESSURE IN HPA 1020.0 1015.5 1019.7 1013.0 1013.3 1011.0 1008.7 1011.0 1015.7 1016.9 1016.6 1017.4 1014.9 MAX. QNH PRESSURE IN HPA 1032.1 1028.5 1034.1 1025.2 1026.2 1017.7 1013.8 1022.7 1023.5 1028.7 1026.4 1029.5 1034.1 DAY 30 16 14 9 19 2 1 8 30 28 19 22 MIN. QNH PRESSURE IN HPA 1004.6 997.6 1006.3 998.6 1003.9 1001.6 1002.5 1004.5 1011.4 1004.1 1003.7 1005.3 997.6 DAY 11 9 31 3 16 15 20 26 16 25 17 14 MEAN QFF PRESSURE IN HPA 1020.3 1015.7 1019.9 1013.3 1013.6 1011.4 1009.1 1011.4 1016.1 1017.3 1016.9 1017.7 1015.2 MAX. QFF PRESSURE IN HPA 1032.3 1028.7 1034.3 1025.4 1026.5 1018.1 1014.2 1023.0 1023.8 1028.9 1026.6 1029.7 1034.3 DAY 30 16 14 9 19 2 1 8 30 28 19 22 MIN. QFF PRESSURE IN HPA 1004.8 997.9 1006.6 998.9 1004.3 1002.0 1002.9 1004.9 1011.8 1004.4 1004.0 1005.6 997.9 DAY 11 9 31 3 16 15 20 26 16 25 17 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1023.3 1018.5 1022.7 1016.0 1015.8 1013.3 1010.9 1013.2 1018.4 1020.1 1019.7 1020.5 1017.7 MAX. QFE PRESSURE IN HPA 1035.4 1032.0 1037.6 1026.7 1028.9 1020.2 1015.5 1025.3 1026.4 1031.8 1029.1 1032.7 1037.6 DAY 30 16 14 14 19 2 1 8 30 28 19 21 MIN. QFE PRESSURE IN HPA 1009.0 1005.0 1006.3 1001.9 1007.0 1005.8 1004.9 1007.2 1013.0 1006.8 1006.1 1008.4 1001.9 DAY 8 22 31 3 15 18 11 26 16 25 17 14 MEAN QNH PRESSURE IN HPA 1020.5 1015.7 1020.0 1013.3 1013.1 1010.6 1008.2 1010.5 1015.7 1017.4 1017.0 1017.8 1015.0 MAX. QNH PRESSURE IN HPA 1032.7 1029.3 1034.9 1024.0 1026.2 1017.5 1012.8 1022.6 1023.7 1029.1 1026.4 1030.0 1034.9 DAY 30 16 14 14 19 2 1 8 30 28 19 21 MIN. QNH PRESSURE IN HPA 1006.3 1002.3 1003.6 999.2 1004.3 1003.1 1002.2 1004.5 1010.3 1004.1 1003.4 1005.7 999.2 DAY 8 22 31 3 15 18 11 26 16 25 17 14 MEAN QFF PRESSURE IN HPA 1020.8 1016.0 1020.2 1013.6 1013.4 1011.0 1008.6 1010.9 1016.0 1017.8 1017.3 1018.0 1015.3 MAX. QFF PRESSURE IN HPA 1032.9 1029.5 1035.1 1024.2 1026.5 1017.9 1013.2 1022.9 1024.0 1029.3 1026.6 1030.2 1035.1 DAY 30 16 14 14 19 2 1 8 30 28 19 21 MIN. QFF PRESSURE IN HPA 1006.6 1002.5 1003.9 999.5 1004.7 1003.5 1002.6 1004.9 1010.7 1004.4 1003.7 1006.0 999.5 DAY 8 22 31 3 15 18 11 26 16 25 17 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1023.6 1018.7 1023.5 1016.5 1016.9 1014.0 1011.8 1013.9 1019.2 1020.4 1019.9 1020.6 1018.3 MAX. QFE PRESSURE IN HPA 1035.9 1032.0 1039.4 1028.1 1029.6 1020.8 1016.5 1026.2 1026.7 1032.1 1028.8 1033.5 1039.4 DAY 29 16 14 14 19 1 23 8 30 28 19 21 MIN. QFE PRESSURE IN HPA 1009.6 1000.5 1007.7 998.1 1006.7 1008.0 1005.5 1008.3 1013.8 1006.8 1005.2 1008.9 998.1 DAY 8 22 31 3 15 18 11 25 16 25 17 14 MEAN QNH PRESSURE IN HPA 1020.9 1016.0 1020.8 1013.8 1014.2 1011.3 1009.1 1011.2 1016.5 1017.7 1017.2 1017.9 1015.5 MAX. QNH PRESSURE IN HPA 1033.2 1029.3 1036.6 1025.4 1026.9 1018.1 1013.8 1023.5 1024.0 1029.4 1026.1 1030.8 1036.6 DAY 29 16 14 14 19 1 23 8 30 28 19 21 MIN. QNH PRESSURE IN HPA 1006.9 997.8 1005.0 995.4 1004.0 1005.3 1002.8 1005.6 1011.1 1004.1 1002.5 1006.2 995.4 DAY 8 22 31 3 15 18 11 25 16 25 17 14 MEAN QFF PRESSURE IN HPA 1021.1 1016.2 1021.0 1014.1 1014.6 1011.7 1009.5 1011.7 1016.9 1018.0 1017.5 1018.1 1015.9 MAX. QFF PRESSURE IN HPA 1033.4 1029.5 1036.9 1025.6 1027.2 1018.5 1014.2 1023.8 1024.3 1029.6 1026.3 1031.0 1036.9 DAY 29 16 14 14 19 1 23 8 30 28 19 21 MIN. QFF PRESSURE IN HPA 1007.2 998.1 1005.3 995.7 1004.4 1005.7 1003.2 1006.0 1011.5 1004.4 1002.9 1006.5 995.7 DAY 8 22 31 3 15 18 11 25 16 25 17 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1023.0 1018.4 1023.6 1016.2 1016.5 1013.9 1011.4 1013.7 1018.9 1019.8 1019.7 1019.8 1017.9 MAX. QFE PRESSURE IN HPA 1035.7 1031.5 1039.1 1027.4 1029.2 1021.0 1016.6 1024.9 1025.9 1030.9 1028.7 1034.0 1039.1 DAY 30 16 14 14 19 1 23 8 29 28 19 21 MIN. QFE PRESSURE IN HPA 1009.0 999.9 1012.5 998.3 1006.5 1008.2 1005.7 1007.5 1014.3 1006.8 1006.7 1008.7 998.3 DAY 7 22 23 3 15 18 11 13 16 25 17 13 MEAN QNH PRESSURE IN HPA 1020.3 1015.7 1020.9 1013.5 1013.8 1011.2 1008.7 1011.0 1016.2 1017.1 1017.0 1017.1 1015.2 MAX. QNH PRESSURE IN HPA 1033.0 1028.8 1036.3 1024.7 1026.5 1018.3 1013.9 1022.2 1023.2 1028.2 1026.0 1031.3 1036.3 DAY 30 16 14 14 19 1 23 8 29 28 19 21 MIN. QNH PRESSURE IN HPA 1006.3 997.2 1009.8 995.6 1003.8 1005.5 1003.0 1004.8 1011.6 1004.1 1004.0 1006.0 995.6 DAY 7 22 23 3 15 18 11 13 16 25 17 13 MEAN QFF PRESSURE IN HPA 1020.5 1015.9 1021.2 1013.7 1014.2 1011.6 1009.1 1011.4 1016.6 1017.4 1017.3 1017.3 1015.5 MAX. QFF PRESSURE IN HPA 1033.2 1029.0 1036.6 1024.9 1026.8 1018.7 1014.3 1022.5 1023.5 1028.4 1026.2 1031.5 1036.6 DAY 30 16 14 14 19 1 23 8 29 28 19 21 MIN. QFF PRESSURE IN HPA 1006.6 997.5 1010.1 995.9 1004.2 1005.9 1003.4 1005.2 1012.0 1004.4 1004.4 1006.3 995.9 DAY 7 22 23 3 15 18 11 13 16 25 17 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.6 9.6 11.0 15.0 17.5 22.9 25.8 26.6 22.2 17.5 14.8 12.1 17.1 MINIMUN AIR TEMPERATURE (C) 7.0 6.4 8.3 11.6 14.1 19.3 21.8 22.9 19.7 14.9 11.5 8.5 13.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 8 24 31 7 0 0 0 70 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 3.0 2.0 1.0 5.0 9.0 16.0 18.0 21.0 18.0 11.0 6.0 6.0 1.0 DAY 16 8 3 5 9 17 2 7 13 18 30 23 MAXIMUM AIR TEMPERATURE (C) 15.3 12.9 14.3 18.6 20.5 26.2 29.5 30.3 24.8 20.6 18.3 15.8 20.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 2 18 25 0 0 0 0 45 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 17.0 24.0 26.0 25.0 30.0 33.0 34.0 28.0 24.0 23.0 22.0 34.0 DAY 25 25 12 17 31 6 25 23 5 6 1 17 DIF. BETWEEN (MAX.-MIN.) (C) 8.3 6.5 6.0 7.0 6.4 6.9 7.7 7.4 5.1 5.7 6.8 7.3 6.8 MEAN DAILY TEMP. (MDT) (C) 11.1 9.6 11.3 15.1 17.3 22.7 25.7 26.6 22.3 17.7 14.9 12.1 17.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.0 56.5 145.0 173.5 41.5 0.0 0.0 0.0 417.5 HEATING DEG. DAYS(BASE 18 0C) 213.0 234.5 208.0 90.0 42.0 0.0 0.0 0.0 0.0 25.0 94.0 181.5 1088.0 DEWPOINT (MEAN C) 8.1 7.7 8.7 12.2 14.6 19.3 21.4 22.6 19.4 15.1 12.0 9.2 14.2 MIXING RATIO (G/KG) 6.72 6.52 7.06 8.92 10.48 14.12 16.21 17.43 14.13 10.72 8.75 7.25 10.69 VAPOUR PRESSURE (HPA) 10.90 10.58 11.43 14.36 16.86 22.48 25.64 27.53 22.58 17.32 14.24 11.74 17.14 SATURATION DEF. (HPA) 2.18 1.53 1.93 2.91 3.45 5.76 8.01 7.73 4.36 2.92 2.82 2.55 3.85 RELATIVE HUMIDITY (MEAN %) 86 88 86 85 84 81 77 80 85 86 84 83 84 RELATIVE HUMIDITY (MAX. %) 96 98 96 96 94 93 90 92 94 95 94 93 94 RELATIVE HUMIDITY (MIN. %) 72 77 74 71 71 67 64 67 72 74 71 72 71 RELATIVE HUMIDITY (MEAN% 03UTC) 90 93 91 91 88 85 81 86 91 92 89 87 89 RELATIVE HUMIDITY (MEAN% 09UTC) 75 81 79 76 77 73 69 71 76 78 73 75 75 RELATIVE HUMIDITY (MEAN% 15UTC) 88 89 87 81 81 76 72 77 84 89 90 89 84 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.0 77.4 93.0 65.5 46.3 54.5 3.0 188.0 148.8 243.2 165.0 22.8 1149.5 DAYS WITH PRECIPITATION >=10 1 3 4 2 3 2 0 3 3 6 2 0 29 DAYS WITH PRECIPITATION >= 5 2 4 7 4 3 2 0 4 5 12 3 3 49 DAYS WITH PRECIPITATION >= 1 7 10 13 8 5 3 2 5 10 15 4 5 87 DAYS WITH PRECIPITATION 8 10 17 11 11 8 3 7 15 16 6 10 122 GREATEST DAILY PRECIPITATION 26.0 28.0 22.0 28.0 17.0 27.0 2.0 108.0 57.0 132.0 101.0 9.0 132.0 DAY 31 6 22 23 7 22 5 31 21 16 5 28 DAY WITH THUNDER STORM 0 1 0 3 1 2 3 1 4 3 0 7 25 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 1 1 2 0 1 0 0 0 5 WIND DIRECTION (PREVAILING) 315 315 90 90 315 45 45 225 315 225 225 225 315 PREVAILING WIND SPEED(KNOTS) 8.3 9.6 6.6 6.2 11.3 5.7 5.6 3.7 7.6 4.2 2.9 3.5 9.8 PREVAILING WIND PERCENT 11.3 14.8 15.0 12.6 19.0 12.1 12.1 16.6 11.3 14.2 10.9 10.1 11.2 CALMS PERCENT OF WIND 42.1 50.7 34.0 45.6 39.7 46.4 47.4 35.2 52.7 47.6 54.0 47.4 45.1 NO. OF WIND OBSERVATION 247 223 247 239 247 239 247 247 239 246 239 247 2907 VECTOR WIND DIRECTION (MEAN) 313 322 4 342 336 350 353 335 310 282 291 282 330 VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.3 0.8 1.5 2.5 1.6 1.8 1.8 1.3 0.9 0.4 1.0 1.2 WIND STEADINESES (MEAN %) 25.9 41.9 19.5 34.9 53.2 44.4 54.5 46.2 48.1 33.3 20.0 38.5 36.4 WIND SPEED (MEAN KNOTS) 2.7 3.1 4.1 4.3 4.7 3.6 3.3 3.9 2.7 2.7 2.0 2.6 3.3 FASTEST WIND DIRECTION 310 310 300 300 320 300 320 320 330 360 290 300 320 FASTEST WIND SPEED (KNOTS) 20 24 25 25 40 22 20 18 20 20 15 20 40 DAY 11 18 20 22 26 30 5 25 14 16 1 27 DAYS WITH SKY CLEAR (0-2)/8 8 7 3 3 7 13 19 17 2 6 7 11 103 DAYS WITH P.CLOUDY (3-6)/8 9 5 12 9 11 8 9 9 13 10 10 10 115 DAYS WITH CLOUDY (7-8)/8 14 16 16 18 13 9 3 5 15 15 13 10 147 DAYS WITH VISIBILITY =< 2 KM 5 1 1 3 1 1 0 0 0 0 1 0 13 DURATION OF SUNSHINE HOURS 112.9 110.6 98.3 126.1 188.4 224.8 262.0 251.1 89.6 104.7 117.5 118.1 1804.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1020.1 1019.7 1018.7 1016.8 1018.4 1013.1 1010.1 1010.2 1017.2 1022.5 1027.6 1019.8 1017.9 MAX. QFE PRESSURE IN HPA 1029.9 1029.3 1031.8 1029.2 1029.8 1020.7 1020.0 1020.5 1025.6 1033.6 1036.8 1035.1 1036.8 DAY-HOUR 1- 0 22- 9 2- 9 5- 6 17-18 17- 3 7-18 31-18 21- 9 9- 6 23- 6 30- 6 MIN. QFE PRESSURE IN HPA 1007.2 1008.1 1002.2 1004.1 1006.1 1003.5 1002.9 1002.7 1007.4 1011.4 1011.2 1005.9 1002.2 DAY-HOUR 26-21 2-12 28-12 16-12 25-21 13- 9 25-15 29- 0 11- 3 15-15 30-12 18- 6 MEAN QNH PRESSURE IN HPA 1017.4 1016.9 1016.0 1014.1 1015.7 1010.4 1007.4 1007.5 1014.5 1019.8 1024.9 1017.1 1015.1 MAX. QNH PRESSURE IN HPA 1027.2 1026.6 1029.1 1026.5 1027.1 1018.0 1017.3 1017.8 1022.9 1030.9 1034.1 1032.4 1034.1 DAY-HOUR 1- 0 22- 9 2- 9 5- 6 17-18 17- 3 7-18 31-18 21- 9 9- 6 23- 6 30- 6 MIN. QNH PRESSURE IN HPA 1004.5 1005.4 999.5 1001.4 1003.4 1000.8 1000.2 1000.0 1004.7 1008.7 1008.5 1003.2 999.5 DAY-HOUR 26-21 2-12 28-12 16-12 25-21 13- 9 25-15 29- 0 11- 3 15-15 30-12 18- 6 MEAN QFF PRESSURE IN HPA 1017.7 1017.2 1016.2 1014.4 1016.1 1010.8 1007.8 1007.9 1014.6 1020.1 1025.2 1017.4 1015.4 MAX. QFF PRESSURE IN HPA 1027.4 1026.8 1029.3 1026.7 1027.4 1018.4 1017.7 1018.2 1023.2 1031.2 1034.4 1032.6 1034.4 DAY-HOUR 1- 0 22- 9 2- 9 5- 6 17-18 17- 3 7-18 31-18 21- 9 9- 6 23- 6 30- 6 MIN. QFF PRESSURE IN HPA 1004.8 1005.7 999.8 1001.7 1003.8 1001.2 1000.7 1000.4 1005.1 1009.0 1008.8 1003.5 999.8 DAY-HOUR 26-21 2-18 28-12 16-12 25-21 13- 9 25-15 29- 0 11- 3 15-15 30-12 18- 6 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1020.0 1019.4 1017.8 1016.6 1018.0 1013.0 1009.9 1009.9 1017.0 1022.0 1027.3 1019.3 1017.5 MAX. QFE PRESSURE IN HPA 1029.9 1028.2 1028.8 1028.7 1028.4 1019.7 1018.9 1013.9 1024.2 1032.0 1034.8 1034.3 1034.8 DAY 1 23 2 5 18 17 8 8 21 9 23 30 MIN. QFE PRESSURE IN HPA 1007.4 1009.5 1003.5 1004.5 1009.9 1006.6 1003.3 1002.7 1007.6 1014.0 1014.0 1006.2 1002.7 DAY 27 3 20 17 26 13 25 29 11 15 30 12 MEAN QNH PRESSURE IN HPA 1017.3 1016.7 1015.1 1013.9 1015.2 1010.3 1007.2 1007.2 1014.3 1019.2 1024.6 1016.6 1014.8 MAX. QNH PRESSURE IN HPA 1027.2 1025.5 1026.1 1026.0 1025.7 1017.0 1016.2 1011.2 1021.5 1029.3 1032.1 1031.6 1032.1 DAY 1 23 2 5 18 17 8 8 21 9 23 30 MIN. QNH PRESSURE IN HPA 1004.7 1006.8 1000.8 1001.8 1007.2 1003.9 1000.6 1000.0 1004.9 1011.3 1011.3 1003.5 1000.0 DAY 27 3 20 17 26 13 25 29 11 15 30 12 MEAN QFF PRESSURE IN HPA 1017.6 1017.0 1015.4 1014.2 1015.6 1010.7 1007.7 1007.7 1014.3 1019.6 1024.9 1016.9 1015.1 MAX. QFF PRESSURE IN HPA 1027.4 1025.7 1026.3 1026.2 1026.0 1017.4 1016.6 1011.6 1021.9 1029.6 1032.4 1031.8 1032.4 DAY 1 23 2 5 18 17 8 8 21 9 23 30 MIN. QFF PRESSURE IN HPA 1005.0 1007.1 1001.1 1002.2 1007.6 1004.3 1001.0 1000.4 1005.3 1011.6 1011.6 1003.8 1000.4 DAY 27 3 20 17 26 13 25 29 11 15 30 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1020.4 1019.6 1018.5 1017.1 1018.8 1013.9 1010.6 1010.5 1017.3 1022.4 1027.8 1019.6 1018.0 MAX. QFE PRESSURE IN HPA 1028.0 1028.1 1030.0 1029.1 1028.4 1020.7 1019.2 1015.0 1024.8 1032.4 1035.7 1034.5 1035.7 DAY 1 23 2 5 18 17 8 31 21 9 23 30 MIN. QFE PRESSURE IN HPA 1007.6 1010.2 1004.1 1005.3 1012.3 1006.0 1004.3 1002.7 1007.4 1014.0 1013.4 1006.2 1002.7 DAY 27 3 28 13 4 13 5 29 11 15 30 12 MEAN QNH PRESSURE IN HPA 1017.7 1016.9 1015.8 1014.4 1016.1 1011.2 1007.9 1007.8 1014.6 1019.7 1025.1 1016.9 1015.3 MAX. QNH PRESSURE IN HPA 1025.3 1025.4 1027.3 1026.4 1025.7 1018.0 1016.5 1012.3 1022.1 1029.7 1033.0 1031.8 1033.0 DAY 1 23 2 5 18 17 8 31 21 9 23 30 MIN. QNH PRESSURE IN HPA 1004.9 1007.5 1001.4 1002.6 1009.6 1003.3 1001.6 1000.0 1004.7 1011.3 1010.7 1003.5 1000.0 DAY 27 3 28 13 4 13 5 29 11 15 30 12 MEAN QFF PRESSURE IN HPA 1017.9 1017.2 1016.0 1014.7 1016.5 1011.5 1008.3 1008.3 1014.8 1020.0 1025.4 1017.2 1015.6 MAX. QFF PRESSURE IN HPA 1025.5 1025.6 1027.5 1026.6 1026.0 1018.4 1016.9 1012.7 1022.4 1030.0 1033.2 1032.0 1033.2 DAY 1 23 2 5 18 17 8 31 21 9 23 30 MIN. QFF PRESSURE IN HPA 1005.2 1007.8 1001.7 1003.0 1009.9 1003.7 1002.0 1000.4 1005.1 1011.6 1011.0 1003.8 1000.4 DAY 27 3 28 13 4 13 5 29 11 15 30 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1021.2 1020.6 1019.5 1017.8 1019.2 1013.9 1011.0 1011.1 1018.0 1023.5 1028.7 1020.8 1018.8 MAX. QFE PRESSURE IN HPA 1027.7 1028.9 1031.5 1029.2 1028.4 1020.6 1019.1 1017.2 1025.2 1033.6 1036.8 1035.1 1036.8 DAY 17 23 2 5 18 17 8 31 21 9 23 30 MIN. QFE PRESSURE IN HPA 1010.2 1011.7 1004.2 1005.6 1010.2 1003.9 1004.3 1002.7 1009.9 1013.9 1013.6 1005.9 1002.7 DAY 27 3 28 13 25 13 5 29 11 15 30 18 MEAN QNH PRESSURE IN HPA 1018.5 1017.9 1016.7 1015.1 1016.5 1011.2 1008.3 1008.4 1015.3 1020.7 1026.0 1018.0 1016.0 MAX. QNH PRESSURE IN HPA 1025.0 1026.2 1028.8 1026.5 1025.7 1017.9 1016.4 1014.5 1022.5 1030.9 1034.1 1032.4 1034.1 DAY 17 23 2 5 18 17 8 31 21 9 23 30 MIN. QNH PRESSURE IN HPA 1007.5 1009.0 1001.5 1002.9 1007.5 1001.2 1001.6 1000.0 1007.2 1011.2 1010.9 1003.2 1000.0 DAY 27 3 28 13 25 13 5 29 11 15 30 18 MEAN QFF PRESSURE IN HPA 1018.7 1018.1 1017.0 1015.4 1016.8 1011.6 1008.7 1008.8 1015.4 1021.1 1026.3 1018.3 1016.4 MAX. QFF PRESSURE IN HPA 1025.2 1026.4 1029.0 1026.7 1026.0 1018.2 1016.8 1014.9 1022.8 1031.2 1034.4 1032.6 1034.4 DAY 17 23 2 5 18 17 8 31 21 9 23 30 MIN. QFF PRESSURE IN HPA 1007.8 1009.3 1001.8 1003.3 1007.9 1001.6 1002.0 1000.4 1007.6 1011.5 1011.2 1003.5 1000.4 DAY 27 3 28 13 25 13 5 29 11 15 30 18 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1020.5 1020.1 1019.4 1017.2 1018.9 1013.6 1010.7 1010.8 1017.5 1023.0 1027.9 1019.9 1018.3 MAX. QFE PRESSURE IN HPA 1027.6 1029.3 1031.8 1029.0 1027.7 1020.5 1019.2 1017.8 1025.6 1032.7 1035.6 1034.2 1035.6 DAY 17 22 2 5 18 17 7 31 21 9 23 30 MIN. QFE PRESSURE IN HPA 1010.4 1011.1 1003.5 1005.1 1010.3 1003.5 1004.3 1004.0 1009.9 1012.9 1012.4 1007.0 1003.5 DAY 27 2 28 13 25 13 5 29 8 15 30 18 MEAN QNH PRESSURE IN HPA 1017.8 1017.4 1016.7 1014.5 1016.2 1010.9 1008.1 1008.1 1014.8 1020.2 1025.1 1017.2 1015.6 MAX. QNH PRESSURE IN HPA 1024.9 1026.6 1029.1 1026.3 1025.0 1017.8 1016.5 1015.1 1022.9 1030.0 1032.9 1031.5 1032.9 DAY 17 22 2 5 18 17 7 31 21 9 23 30 MIN. QNH PRESSURE IN HPA 1007.7 1008.4 1000.8 1002.4 1007.6 1000.8 1001.6 1001.3 1007.2 1010.2 1009.7 1004.3 1000.8 DAY 27 2 28 13 25 13 5 29 8 15 30 18 MEAN QFF PRESSURE IN HPA 1017.9 1017.4 1016.9 1014.5 1016.7 1011.3 1008.4 1008.5 1014.8 1020.6 1025.5 1017.6 1015.8 MAX. QFF PRESSURE IN HPA 1025.1 1026.8 1029.3 1026.5 1025.3 1018.1 1016.9 1015.5 1023.2 1030.3 1033.2 1031.7 1033.2 DAY 17 22 2 5 18 17 7 31 21 9 23 30 MIN. QFF PRESSURE IN HPA 1008.0 1008.7 1001.1 1002.7 1008.0 1001.2 1002.0 1001.7 1007.6 1010.5 1010.0 1004.6 1001.1 DAY 27 2 28 13 25 13 5 29 8 15 30 18 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1019.4 1019.1 1018.4 1016.2 1018.2 1012.7 1009.7 1010.0 1016.5 1022.3 1027.0 1019.4 1017.4 MAX. QFE PRESSURE IN HPA 1027.6 1028.7 1030.4 1027.0 1027.2 1018.7 1018.2 1018.1 1023.9 1031.8 1035.0 1033.1 1035.0 DAY 31 22 2 5 17 17 7 31 21 9 23 30 MIN. QFE PRESSURE IN HPA 1009.6 1008.1 1002.2 1004.1 1008.9 1003.5 1003.6 1003.8 1008.7 1011.8 1011.2 1007.1 1002.2 DAY 27 2 28 16 3 13 25 29 8 15 30 18 MEAN QNH PRESSURE IN HPA 1016.7 1016.4 1015.7 1013.5 1015.5 1010.0 1007.1 1007.3 1013.8 1019.6 1024.3 1016.7 1014.7 MAX. QNH PRESSURE IN HPA 1024.9 1026.0 1027.7 1024.3 1024.5 1016.0 1015.5 1015.4 1021.2 1029.1 1032.3 1030.4 1032.3 DAY 31 22 2 5 17 17 7 31 21 9 23 30 MIN. QNH PRESSURE IN HPA 1006.9 1005.4 999.5 1001.4 1006.2 1000.8 1000.9 1001.1 1006.0 1009.1 1008.5 1004.4 999.5 DAY 27 2 28 16 3 13 25 29 8 15 30 18 MEAN QFF PRESSURE IN HPA 1017.0 1016.7 1016.0 1013.8 1015.8 1010.4 1007.5 1007.7 1014.0 1019.9 1024.6 1017.0 1015.0 MAX. QFF PRESSURE IN HPA 1025.1 1026.2 1027.9 1024.5 1024.8 1016.4 1015.9 1015.8 1021.5 1029.4 1032.6 1030.6 1032.6 DAY 31 22 2 5 17 17 7 31 21 9 23 30 MIN. QFF PRESSURE IN HPA 1007.2 1005.7 999.8 1001.7 1006.5 1001.2 1001.4 1001.5 1006.4 1009.4 1008.8 1004.7 999.8 DAY 27 2 28 16 3 13 25 29 8 15 30 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1019.8 1019.5 1018.5 1016.2 1017.9 1012.2 1009.3 1009.4 1016.5 1022.4 1027.2 1019.8 1017.4 MAX. QFE PRESSURE IN HPA 1028.4 1028.7 1030.6 1028.0 1028.0 1018.0 1018.6 1018.8 1023.2 1031.5 1035.1 1033.9 1035.1 DAY 31 22 2 4 17 17 7 31 21 9 23 29 MIN. QFE PRESSURE IN HPA 1009.2 1008.6 1005.2 1004.7 1007.0 1004.6 1002.9 1003.8 1007.7 1011.4 1012.0 1007.8 1002.9 DAY 26 2 28 13 3 10 25 29 8 15 30 18 MEAN QNH PRESSURE IN HPA 1017.1 1016.8 1015.8 1013.5 1015.2 1009.5 1006.6 1006.7 1013.8 1019.7 1024.5 1017.1 1014.7 MAX. QNH PRESSURE IN HPA 1025.7 1026.0 1027.9 1025.3 1025.3 1015.3 1015.9 1016.1 1020.5 1028.8 1032.4 1031.2 1032.4 DAY 31 22 2 4 17 17 7 31 21 9 23 29 MIN. QNH PRESSURE IN HPA 1006.5 1005.9 1002.5 1002.0 1004.3 1001.9 1000.2 1001.1 1005.0 1008.7 1009.3 1005.1 1000.2 DAY 26 2 28 13 3 10 25 29 8 15 30 18 MEAN QFF PRESSURE IN HPA 1017.4 1017.0 1016.1 1013.8 1015.6 1009.9 1007.0 1007.2 1013.9 1020.0 1024.8 1017.4 1015.0 MAX. QFF PRESSURE IN HPA 1025.9 1026.2 1028.1 1025.5 1025.6 1015.7 1016.3 1016.5 1020.8 1029.1 1032.6 1031.4 1032.6 DAY 31 22 2 4 17 17 7 31 21 9 23 29 MIN. QFF PRESSURE IN HPA 1006.8 1006.2 1002.8 1002.3 1004.6 1002.3 1000.7 1001.5 1005.4 1009.0 1009.6 1005.4 1000.7 DAY 26 2 28 16 3 10 25 29 8 15 30 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1020.2 1019.7 1019.1 1017.1 1018.5 1012.9 1009.9 1010.2 1017.4 1022.7 1027.4 1020.1 1017.9 MAX. QFE PRESSURE IN HPA 1028.8 1028.9 1030.2 1029.0 1029.8 1018.7 1020.0 1020.5 1024.2 1031.3 1035.1 1035.0 1035.1 DAY 31 22 2 4 17 2 7 31 14 17 22 29 MIN. QFE PRESSURE IN HPA 1008.8 1008.1 1005.5 1005.9 1006.7 1005.7 1003.4 1005.1 1008.0 1012.9 1013.7 1006.7 1003.4 DAY 26 2 19 13 3 10 25 2 10 15 30 11 MEAN QNH PRESSURE IN HPA 1017.5 1017.0 1016.3 1014.4 1015.7 1010.2 1007.2 1007.5 1014.7 1020.0 1024.7 1017.4 1015.2 MAX. QNH PRESSURE IN HPA 1026.1 1026.2 1027.5 1026.3 1027.1 1016.0 1017.3 1017.8 1021.5 1028.6 1032.4 1032.3 1032.4 DAY 31 22 2 4 17 2 7 31 14 17 22 29 MIN. QNH PRESSURE IN HPA 1006.1 1005.4 1002.8 1003.2 1004.0 1003.0 1000.7 1002.4 1005.3 1010.2 1011.0 1004.0 1000.7 DAY 26 2 19 13 3 10 25 2 10 15 30 11 MEAN QFF PRESSURE IN HPA 1017.8 1017.3 1016.6 1014.7 1016.1 1010.6 1007.6 1007.9 1014.9 1020.3 1025.0 1017.7 1015.5 MAX. QFF PRESSURE IN HPA 1026.3 1026.4 1027.7 1026.5 1027.4 1016.4 1017.7 1018.2 1021.8 1028.9 1032.7 1032.5 1032.7 DAY 31 22 2 4 17 2 7 31 14 17 22 29 MIN. QFF PRESSURE IN HPA 1006.4 1005.7 1003.1 1003.5 1004.4 1003.4 1001.2 1002.8 1005.7 1010.5 1011.3 1004.3 1001.2 DAY 26 2 19 13 3 10 25 2 10 15 30 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1019.5 1019.4 1018.5 1016.8 1018.1 1013.0 1009.9 1010.0 1017.3 1022.1 1027.7 1019.5 1017.6 MAX. QFE PRESSURE IN HPA 1027.5 1028.6 1030.4 1029.1 1028.4 1018.9 1019.3 1014.1 1024.6 1031.2 1034.9 1034.3 1034.9 DAY 11 22 2 4 17 2 7 8 14 8 22 29 MIN. QFE PRESSURE IN HPA 1007.2 1008.6 1003.5 1005.3 1006.1 1006.6 1003.3 1003.7 1009.1 1014.1 1014.8 1006.3 1003.3 DAY 26 2 19 12 25 10 24 28 10 15 29 11 MEAN QNH PRESSURE IN HPA 1016.8 1016.7 1015.8 1014.1 1015.4 1010.3 1007.2 1007.3 1014.6 1019.4 1024.9 1016.8 1014.9 MAX. QNH PRESSURE IN HPA 1024.8 1025.9 1027.7 1026.4 1025.7 1016.2 1016.6 1011.4 1021.9 1028.5 1032.2 1031.6 1032.2 DAY 11 22 2 4 17 2 7 8 14 8 22 29 MIN. QNH PRESSURE IN HPA 1004.5 1005.9 1000.8 1002.6 1003.4 1003.9 1000.6 1001.0 1006.4 1011.4 1012.1 1003.6 1000.6 DAY 26 2 19 12 25 10 24 28 10 15 29 11 MEAN QFF PRESSURE IN HPA 1017.1 1016.9 1016.1 1014.4 1015.7 1010.6 1007.6 1007.8 1014.5 1019.7 1025.2 1017.1 1015.2 MAX. QFF PRESSURE IN HPA 1025.0 1026.1 1027.9 1026.6 1026.0 1016.6 1017.0 1011.8 1022.2 1028.8 1032.5 1031.8 1032.5 DAY 11 22 2 4 17 2 7 8 14 8 22 29 MIN. QFF PRESSURE IN HPA 1004.8 1006.2 1001.1 1003.0 1003.8 1004.3 1001.0 1001.4 1006.8 1011.7 1012.4 1003.9 1001.0 DAY 26 2 19 12 25 12 24 28 10 15 29 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 5.9 8.8 12.4 18.8 21.2 24.3 25.2 21.2 18.7 15.4 10.8 16.0 MINIMUN AIR TEMPERATURE (C) 4.8 3.2 6.1 9.2 15.2 17.5 20.8 21.3 18.8 14.5 11.5 5.7 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 3 18 20 5 0 0 0 46 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 6 1 0 0 0 0 0 0 0 0 1 9 TEMPERATURE RECORDS LOWEST(C) -1.0 -2.0 0.0 2.0 11.0 10.0 18.0 19.0 14.0 9.0 4.0 -1.0 -2.0 DAY 23 3 2 2 1 6 2 2 26 23 29 25 MAXIMUM AIR TEMPERATURE (C) 13.4 9.1 11.7 15.6 22.4 25.0 28.0 29.0 24.2 21.5 18.2 14.6 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 4 14 1 1 0 0 20 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.0 16.0 19.0 26.0 29.0 29.0 31.0 32.0 30.0 31.0 23.0 21.0 32.0 DAY 15 23 6 20 23 28 9 18 6 11 4 6 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 5.9 5.6 6.4 7.2 7.5 7.2 7.7 5.4 7.0 6.7 8.9 7.0 MEAN DAILY TEMP. (MDT) (C) 9.1 6.2 8.9 12.4 18.8 21.2 24.4 25.2 21.5 18.0 14.8 10.2 15.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 6.5 28.5 105.0 129.0 33.5 2.0 0.0 0.0 304.5 HEATING DEG. DAYS(BASE 18 0C) 276.5 331.5 282.5 169.5 17.5 5.5 0.0 0.0 0.5 18.5 97.5 243.0 1442.5 DEWPOINT (MEAN C) 5.3 3.2 6.4 9.0 15.1 16.2 19.2 21.1 18.4 15.7 12.4 7.1 12.4 MIXING RATIO (G/KG) 5.63 4.82 6.01 7.24 10.78 11.79 14.06 15.94 13.36 11.18 9.18 6.40 9.70 VAPOUR PRESSURE (HPA) 9.16 7.85 9.74 11.68 17.31 18.82 22.29 25.17 21.28 17.98 14.78 10.34 15.53 SATURATION DEF. (HPA) 2.69 1.65 1.73 3.09 4.70 6.86 8.34 7.19 4.25 3.92 3.08 3.00 4.21 RELATIVE HUMIDITY (MEAN %) 79 84 86 81 80 75 74 79 85 84 83 80 81 RELATIVE HUMIDITY (MAX. %) 92 95 95 93 90 89 89 93 95 96 95 92 93 RELATIVE HUMIDITY (MIN. %) 64 70 73 67 67 58 59 64 71 73 73 66 67 RELATIVE HUMIDITY (MEAN% 03UTC) 82 90 90 86 85 81 82 89 89 94 93 89 88 RELATIVE HUMIDITY (MEAN% 09UTC) 71 75 80 72 72 64 62 69 76 77 74 68 72 RELATIVE HUMIDITY (MEAN% 15UTC) 86 84 83 82 75 69 70 76 85 89 90 87 81 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 28.0 196.7 127.8 12.7 32.3 103.0 5.1 29.4 158.4 248.6 150.5 128.9 1221.4 DAYS WITH PRECIPITATION >=10 1 3 5 0 1 1 0 1 7 6 4 4 33 DAYS WITH PRECIPITATION >= 5 2 6 7 0 2 1 0 4 9 10 6 5 52 DAYS WITH PRECIPITATION >= 1 6 11 14 4 4 4 3 6 16 11 8 6 93 DAYS WITH PRECIPITATION 7 12 19 18 10 4 7 6 16 12 13 7 131 GREATEST DAILY PRECIPITATION 11.0 86.0 28.0 4.0 23.0 96.0 3.0 10.0 31.0 85.0 90.0 63.0 96.0 DAY 22 14 8 9 15 5 25 13 11 13 16 16 DAY WITH THUNDER STORM 0 0 1 2 0 0 0 0 0 2 0 0 5 DAYS WITH SNOW OR SLEET 0 3 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 0 1 2 0 1 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 225 315 315 90 45 315 360 360 315 90 315 90 315 PREVAILING WIND SPEED(KNOTS) 3.5 10.6 10.4 8.3 5.8 8.9 7.5 6.0 5.1 5.9 6.8 5.2 9.0 PREVAILING WIND PERCENT 11.7 17.9 17.4 15.9 11.3 11.3 14.9 17.8 5.4 7.7 12.0 9.0 10.2 CALMS PERCENT OF WIND 41.3 37.7 38.9 48.1 53.4 53.8 65.3 70.9 72.0 61.5 62.7 65.2 55.3 NO. OF WIND OBSERVATION 247 223 247 239 247 238 248 247 239 156 150 155 2636 VECTOR WIND DIRECTION (MEAN) 309 300 328 36 7 360 347 347 17 32 348 41 348 VECTOR WIND MAGNITUDE(KNOTS) 0.6 2.4 1.8 1.4 1.3 1.6 1.9 1.5 0.4 0.7 0.5 0.5 1.0 WIND STEADINESES (MEAN %) 18.8 52.2 36.7 35.0 48.1 48.5 79.2 83.3 26.7 33.3 26.3 29.4 35.7 WIND SPEED (MEAN KNOTS) 3.2 4.6 4.9 4.0 2.7 3.3 2.4 1.8 1.5 2.1 1.9 1.7 2.8 FASTEST WIND DIRECTION 290 280 300 300 310 300 340 320 340 310 330 300 300 FASTEST WIND SPEED (KNOTS) 28 28 35 22 14 30 18 18 17 13 14 15 35 DAY 20 1 29 5 25 3 18 18 7 22 27 23 DAYS WITH SKY CLEAR (0-2)/8 13 6 6 3 6 14 7 14 4 8 8 13 102 DAYS WITH P.CLOUDY (3-6)/8 14 7 7 11 15 4 13 11 10 11 8 10 121 DAYS WITH CLOUDY (7-8)/8 4 15 18 16 10 12 11 6 16 12 14 8 142 DAYS WITH VISIBILITY =< 2 KM 0 1 0 0 0 1 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 167.7 92.8 107.2 109.2 174.7 202.4 155.6 207.5 68.5 134.5 104.9 158.0 1683.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1021.6 1023.6 1018.7 1016.8 1016.9 1013.5 1008.6 1007.8 1013.0 1018.8 1017.6 1015.5 1016.0 MAX. QFE PRESSURE IN HPA 1033.5 1039.3 1031.9 1030.6 1026.2 1024.1 1016.4 1013.6 1024.3 1028.3 1029.2 1028.5 1039.3 DAY-HOUR 26- 6 3- 6 1- 6 9- 6 3- 6 5-15 22- 6 15- 6 24-15 15- 6 30- 9 12- 6 MIN. QFE PRESSURE IN HPA 1007.0 1001.6 1006.8 1000.3 1006.6 997.7 1004.0 1002.5 1002.7 1005.7 1007.5 1000.9 997.7 DAY-HOUR 15-21 24- 0 17- 3 25- 9 27-12 22-15 10-12 20-15 17-15 11-12 22-15 22-15 MEAN QNH PRESSURE IN HPA 1018.8 1020.8 1016.0 1014.0 1014.2 1010.8 1005.9 1005.1 1010.3 1016.1 1014.9 1012.8 1013.3 MAX. QNH PRESSURE IN HPA 1030.8 1036.5 1029.2 1027.9 1023.5 1021.4 1013.7 1010.9 1021.6 1025.6 1026.5 1025.8 1036.5 DAY-HOUR 26- 6 3- 6 1- 6 9- 6 3- 6 5-15 22- 6 15- 6 24-15 15- 6 30- 9 12- 6 MIN. QNH PRESSURE IN HPA 1004.3 998.9 1004.1 997.6 1003.9 995.0 1001.3 999.8 1000.0 1003.0 1004.8 998.2 995.0 DAY-HOUR 15-21 24- 0 17- 3 25- 9 27-12 22-15 10-12 20-15 17-15 11-12 22-15 22-15 MEAN QFF PRESSURE IN HPA 1019.1 1021.1 1016.2 1014.3 1014.6 1011.2 1006.3 1005.5 1010.6 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.0 1036.7 1029.4 1028.1 1023.8 1021.7 1014.1 1011.3 1021.9 ****** ****** ****** ****** DAY-HOUR 26- 6 3- 6 1- 6 9- 6 3- 9 5-15 22- 9 15- 6 24-18 **-** **-** **-** MIN. QFF PRESSURE IN HPA 1004.7 999.2 1004.4 997.9 1004.3 995.4 1001.7 1000.2 1000.4 ****** ****** ****** ****** DAY-HOUR 15-21 24- 0 17- 3 25- 9 27-12 22-15 10-12 20-15 17-15 **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1021.6 1022.9 1018.2 1016.2 1016.5 1013.4 1008.4 1007.6 1012.9 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 1030.8 1038.1 1031.8 1028.6 1024.4 1020.6 1014.8 1012.6 1023.3 ****** ****** ****** ****** DAY 1 3 1 13 3 6 22 15 25 ** ** ** MIN. QFE PRESSURE IN HPA 1010.6 1001.6 1007.0 1002.6 1007.7 1004.2 1004.4 1003.5 1003.6 ****** ****** ****** ****** DAY 16 24 17 25 27 23 5 20 18 ** ** ** MEAN QNH PRESSURE IN HPA 1018.9 1020.2 1015.5 1013.5 1013.7 1010.7 1005.7 1004.9 1010.2 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.1 1035.4 1029.1 1025.9 1021.7 1017.9 1012.1 1009.9 1020.6 ****** ****** ****** ****** DAY 1 3 1 13 3 6 22 15 25 ** ** ** MIN. QNH PRESSURE IN HPA 1007.9 998.9 1004.3 999.9 1005.0 1001.5 1001.7 1000.8 1000.9 ****** ****** ****** ****** DAY 16 24 17 25 27 23 5 20 18 ** ** ** MEAN QFF PRESSURE IN HPA 1019.1 1020.4 1015.8 1013.8 1014.1 1011.1 1006.1 1005.3 1010.5 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1028.3 1035.5 1029.3 1026.1 1022.0 1018.2 1012.5 1010.3 1020.9 ****** ****** ****** ****** DAY 1 3 1 13 3 6 22 15 25 ** ** ** MIN. QFF PRESSURE IN HPA 1008.2 999.2 1004.6 1000.2 1005.4 1001.9 1002.1 1001.2 1001.3 ****** ****** ****** ****** DAY 16 24 17 25 27 23 7 20 18 ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1021.8 1023.3 1018.7 1016.8 1017.0 1014.0 1009.0 1008.2 1013.3 1018.5 1017.7 1015.7 1016.2 MAX. QFE PRESSURE IN HPA 1032.2 1038.6 1031.8 1029.2 1025.8 1020.9 1015.6 1013.1 1023.3 1027.2 1028.6 1028.4 1038.6 DAY 26 3 1 13 3 6 22 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 1010.9 1003.7 1006.8 1001.1 1007.7 1005.1 1004.8 1004.1 1003.8 1006.1 1007.9 1002.4 1001.1 DAY 15 24 17 25 27 23 10 20 18 11 23 23 MEAN QNH PRESSURE IN HPA 1019.1 1020.6 1016.0 1014.1 1014.3 1011.3 1006.3 1005.6 1010.6 1015.8 1015.0 1013.0 1013.5 MAX. QNH PRESSURE IN HPA 1029.5 1035.9 1029.1 1026.5 1023.1 1018.2 1012.9 1010.4 1020.6 1024.5 1025.9 1025.7 1035.9 DAY 26 3 1 13 3 6 22 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1008.2 1001.0 1004.1 998.4 1005.0 1002.4 1002.1 1001.4 1001.1 1003.4 1005.2 999.7 998.4 DAY 15 24 17 25 27 23 10 20 18 11 23 23 MEAN QFF PRESSURE IN HPA 1019.3 1020.8 1016.3 1014.4 1014.6 1011.6 1006.7 1006.0 1011.0 1016.1 1015.2 1013.2 1013.8 MAX. QFF PRESSURE IN HPA 1029.7 1036.0 1029.3 1026.7 1023.4 1018.5 1013.3 1010.8 1020.9 1024.8 1026.1 1025.9 1036.0 DAY 26 3 1 13 3 6 22 15 25 15 30 12 MIN. QFF PRESSURE IN HPA 1008.5 1001.3 1004.4 998.7 1005.4 1002.8 1002.5 1001.8 1001.5 1003.7 1005.5 1000.0 998.7 DAY 15 24 17 25 27 23 10 20 18 11 23 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1023.0 1024.5 1019.7 1017.7 1017.7 1014.4 1009.2 1008.7 1013.8 1019.6 1018.3 1016.5 1016.9 MAX. QFE PRESSURE IN HPA 1033.5 1039.3 1031.9 1030.6 1026.2 1022.5 1016.4 1013.6 1023.4 1028.3 1028.7 1028.5 1039.3 DAY 26 3 1 9 3 5 22 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 1011.3 1006.4 1006.9 1000.5 1007.7 1005.9 1005.1 1004.6 1004.9 1006.4 1009.4 1004.3 1000.5 DAY 15 24 17 25 27 23 10 20 18 11 22 4 MEAN QNH PRESSURE IN HPA 1020.3 1021.7 1017.0 1015.0 1015.0 1011.7 1006.6 1006.0 1011.1 1016.9 1015.6 1013.8 1014.2 MAX. QNH PRESSURE IN HPA 1030.8 1036.5 1029.2 1027.9 1023.5 1019.8 1013.7 1010.9 1020.7 1025.6 1026.0 1025.8 1036.5 DAY 26 3 1 9 3 5 22 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1008.6 1003.7 1004.2 997.8 1005.0 1003.2 1002.4 1001.9 1002.2 1003.7 1006.7 1001.6 997.8 DAY 15 24 17 25 27 23 10 20 18 11 22 4 MEAN QFF PRESSURE IN HPA 1020.6 1022.0 1017.3 1015.3 1015.3 1012.1 1006.9 1006.4 1011.4 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.0 1036.7 1029.4 1028.1 1023.8 1020.1 1014.1 1011.3 1021.0 ****** ****** ****** ****** DAY 26 3 1 9 3 5 22 15 25 ** ** ** MIN. QFF PRESSURE IN HPA 1008.9 1004.0 1004.5 998.2 1005.4 1003.6 1002.8 1002.3 1002.6 ****** ****** ****** ****** DAY 15 24 17 25 27 23 10 20 18 ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1021.8 1023.9 1019.1 1017.1 1017.4 1013.8 1008.8 1008.2 1013.1 1019.1 1017.4 1015.5 1016.3 MAX. QFE PRESSURE IN HPA 1032.3 1038.6 1030.2 1030.0 1026.2 1023.5 1016.4 1012.9 1023.4 1027.4 1029.2 1026.7 1038.6 DAY 26 3 1 13 3 5 22 15 24 15 30 12 MIN. QFE PRESSURE IN HPA 1008.1 1007.2 1008.5 1000.3 1006.7 1002.5 1004.4 1004.0 1004.7 1006.4 1008.3 1003.5 1000.3 DAY 15 24 17 25 27 22 10 20 17 11 25 3 MEAN QNH PRESSURE IN HPA 1019.1 1021.1 1016.4 1014.4 1014.7 1011.1 1006.1 1005.5 1010.4 1016.4 1014.7 1012.8 1013.6 MAX. QNH PRESSURE IN HPA 1029.6 1035.9 1027.5 1027.3 1023.5 1020.8 1013.7 1010.2 1020.7 1024.7 1026.5 1024.0 1035.9 DAY 26 3 1 13 3 5 22 15 24 15 30 12 MIN. QNH PRESSURE IN HPA 1005.4 1004.5 1005.8 997.6 1004.0 999.8 1001.7 1001.3 1002.0 1003.7 1005.6 1000.8 997.6 DAY 15 24 17 25 27 22 10 20 17 11 25 3 MEAN QFF PRESSURE IN HPA 1019.0 1021.3 1016.3 1014.3 1015.1 1011.4 1006.6 1005.9 1010.9 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1029.8 1036.0 1026.6 1027.5 1023.8 1021.1 1014.1 1010.6 1021.0 ****** ****** ****** ****** DAY 26 3 11 13 3 5 22 15 24 ** ** ** MIN. QFF PRESSURE IN HPA 1005.7 1004.8 1006.1 997.9 1004.4 1000.2 1002.1 1001.7 1002.4 ****** ****** ****** ****** DAY 15 24 17 25 27 22 10 20 17 ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1020.8 1022.9 1018.2 1016.3 1016.6 1013.0 1008.1 1007.4 1012.4 1018.4 1017.1 1014.8 1015.5 MAX. QFE PRESSURE IN HPA 1031.3 1036.8 1028.8 1029.3 1024.7 1023.7 1015.4 1012.4 1023.4 1027.5 1027.6 1025.1 1036.8 DAY 26 3 30 12 3 5 22 15 24 22 30 12 MIN. QFE PRESSURE IN HPA 1007.4 1008.1 1008.3 1002.6 1006.6 1000.8 1004.0 1002.7 1003.6 1005.7 1007.7 1001.4 1000.8 DAY 15 24 5 25 27 22 10 20 17 11 22 3 MEAN QNH PRESSURE IN HPA 1018.1 1020.1 1015.5 1013.6 1013.9 1010.3 1005.4 1004.7 1009.7 1015.7 1014.4 1012.0 1012.8 MAX. QNH PRESSURE IN HPA 1028.6 1034.1 1026.1 1026.6 1022.0 1021.0 1012.7 1009.7 1020.7 1024.8 1024.9 1022.4 1034.1 DAY 26 3 30 12 3 5 22 15 24 22 30 12 MIN. QNH PRESSURE IN HPA 1004.7 1005.4 1005.6 999.9 1003.9 998.1 1001.3 1000.0 1000.9 1003.0 1005.0 998.7 998.1 DAY 15 24 5 25 27 22 10 20 17 11 22 3 MEAN QFF PRESSURE IN HPA 1018.4 1020.4 1015.7 1013.9 1014.2 1010.7 1005.8 1005.1 1010.0 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1028.8 1034.2 1026.3 1026.8 1022.3 1021.3 1013.1 1010.1 1021.0 ****** ****** ****** ****** DAY 26 3 30 12 3 5 22 15 24 ** ** ** MIN. QFF PRESSURE IN HPA 1005.0 1005.7 1005.9 1000.2 1004.3 998.5 1001.7 1000.4 1001.3 ****** ****** ****** ****** DAY 15 24 5 25 27 22 10 20 17 ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1021.1 1023.6 1018.5 1016.5 1016.6 1012.6 1007.8 1007.0 1012.3 1018.5 1017.4 1015.3 1015.6 MAX. QFE PRESSURE IN HPA 1030.6 1036.6 1029.4 1029.3 1024.1 1024.1 1015.1 1011.8 1024.3 1028.0 1028.0 1025.9 1036.6 DAY 26 3 30 12 3 5 22 15 24 22 30 11 MIN. QFE PRESSURE IN HPA 1007.5 1008.8 1008.2 1003.6 1007.5 997.7 1004.0 1002.5 1002.7 1007.0 1007.5 1000.9 997.7 DAY 15 23 5 25 27 22 10 20 17 11 22 22 MEAN QNH PRESSURE IN HPA 1018.4 1020.8 1015.8 1013.8 1013.9 1009.9 1005.1 1004.3 1009.6 1015.8 1014.7 1012.6 1012.9 MAX. QNH PRESSURE IN HPA 1027.9 1033.9 1026.7 1026.6 1021.4 1021.4 1012.4 1009.1 1021.6 1025.3 1025.3 1023.2 1033.9 DAY 26 3 30 12 3 5 22 15 24 22 30 11 MIN. QNH PRESSURE IN HPA 1004.8 1006.1 1005.5 1000.9 1004.8 995.0 1001.3 999.8 1000.0 1004.3 1004.8 998.2 995.0 DAY 15 23 5 25 27 22 10 20 17 11 22 22 MEAN QFF PRESSURE IN HPA 1018.7 1021.1 1016.0 1014.1 1014.2 1010.3 1005.5 1004.7 1010.0 1016.1 1015.0 1012.9 1013.2 MAX. QFF PRESSURE IN HPA 1028.1 1034.0 1026.9 1026.8 1021.7 1021.7 1012.8 1009.5 1021.9 1025.6 1025.5 1023.4 1034.0 DAY 26 3 30 12 3 5 22 15 24 22 30 11 MIN. QFF PRESSURE IN HPA 1005.1 1006.4 1005.8 1001.2 1005.2 995.4 1001.7 1000.2 1000.4 1004.7 1005.1 998.5 995.4 DAY 15 23 5 25 27 22 10 20 17 11 22 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1021.3 1024.3 1018.9 1016.9 1017.0 1013.3 1008.6 1007.8 1013.2 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 1030.2 1037.0 1029.9 1029.8 1024.9 1023.7 1015.7 1012.6 1024.3 ****** ****** ****** ****** DAY 1 2 30 12 2 5 22 15 24 ** ** ** MIN. QFE PRESSURE IN HPA 1007.9 1007.8 1008.4 1002.7 1007.5 1000.5 1004.1 1004.0 1003.4 ****** ****** ****** ****** DAY 15 23 25 24 27 22 4 17 17 ** ** ** MEAN QNH PRESSURE IN HPA 1018.6 1021.6 1016.2 1014.2 1014.3 1010.6 1005.9 1005.1 1010.5 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.5 1034.3 1027.2 1027.1 1022.2 1021.0 1013.0 1009.9 1021.6 ****** ****** ****** ****** DAY 1 2 30 12 2 5 22 15 24 ** ** ** MIN. QNH PRESSURE IN HPA 1005.2 1005.1 1005.7 1000.0 1004.8 997.8 1001.4 1001.3 1000.7 ****** ****** ****** ****** DAY 15 23 25 24 27 22 4 17 17 ** ** ** MEAN QFF PRESSURE IN HPA 1018.9 1021.8 1016.5 1014.4 1014.6 1011.4 1006.3 1005.5 1010.8 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.7 1034.4 1027.4 1027.3 1022.5 1021.3 1013.4 1010.3 1021.9 ****** ****** ****** ****** DAY 1 2 30 12 2 5 22 15 24 ** ** ** MIN. QFF PRESSURE IN HPA 1005.6 1005.4 1006.0 1000.3 1005.2 1000.8 1001.8 1001.7 1001.1 ****** ****** ****** ****** DAY 15 23 25 24 27 3 4 20 17 ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1021.2 1023.4 1018.3 1016.6 1016.9 1013.6 1008.6 1007.6 1013.1 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 1029.7 1037.5 1029.2 1029.8 1024.9 1022.4 1015.4 1012.6 1024.1 ****** ****** ****** ****** DAY 23 2 11 12 2 5 22 14 24 ** ** ** MIN. QFE PRESSURE IN HPA 1007.0 1005.5 1008.4 1002.3 1007.7 1003.4 1004.4 1004.2 1003.6 ****** ****** ****** ****** DAY 15 23 25 24 26 22 4 19 17 ** ** ** MEAN QNH PRESSURE IN HPA 1018.5 1020.7 1015.6 1013.8 1014.2 1010.9 1005.9 1004.9 1010.4 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.0 1034.8 1026.5 1027.1 1022.2 1019.7 1012.7 1009.9 1021.4 ****** ****** ****** ****** DAY 23 2 11 12 2 5 22 14 24 ** ** ** MIN. QNH PRESSURE IN HPA 1004.3 1002.8 1005.7 999.6 1005.0 1000.7 1001.7 1001.5 1000.9 ****** ****** ****** ****** DAY 15 23 25 24 26 22 4 19 17 ** ** ** MEAN QFF PRESSURE IN HPA 1018.7 1020.9 1015.8 1014.1 1014.5 1011.2 1006.3 1005.3 1010.7 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.2 1034.9 1026.7 1027.3 1022.5 1020.0 1013.1 1010.3 1021.7 ****** ****** ****** ****** DAY 23 2 11 12 2 5 22 14 24 ** ** ** MIN. QFF PRESSURE IN HPA 1004.7 1003.1 1006.0 999.9 1005.4 1001.1 1002.1 1001.9 1001.3 ****** ****** ****** ****** DAY 15 23 25 24 26 22 6 19 17 ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.0 8.1 9.8 13.0 21.1 22.2 25.6 24.7 22.9 18.9 13.8 10.0 16.7 MINIMUN AIR TEMPERATURE (C) 4.9 4.0 5.7 9.0 15.1 17.3 20.5 21.7 19.2 16.2 11.0 7.4 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 5 16 23 6 1 0 0 52 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 2 4 0 0 0 0 0 0 0 0 0 0 6 TEMPERATURE RECORDS LOWEST(C) 0.0 -1.0 1.0 6.0 9.0 13.0 15.0 20.0 17.0 9.0 7.0 4.0 -1.0 DAY 23 5 24 1 1 1 13 15 8 28 19 14 MAXIMUM AIR TEMPERATURE (C) 13.7 10.7 12.7 15.2 23.9 24.3 28.1 28.3 27.2 22.0 17.2 13.0 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 0 0 0 14 5 3 0 0 0 23 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.0 23.0 31.0 22.0 28.0 29.0 33.0 31.0 32.0 25.0 20.0 22.0 33.0 DAY 13 27 13 14 20 28 20 16 27 4 7 27 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 6.7 7.0 6.2 8.8 7.0 7.6 6.6 8.0 5.8 6.2 5.6 7.0 MEAN DAILY TEMP. (MDT) (C) 9.3 7.4 9.2 12.1 19.5 20.8 24.3 25.0 23.2 19.1 14.1 10.2 16.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.0 0.0 7.0 29.0 103.0 124.5 68.5 4.5 0.0 0.0 337.5 HEATING DEG. DAYS(BASE 18 0C) 269.5 308.5 276.0 177.5 7.0 9.0 0.0 0.0 0.0 21.5 116.5 242.0 1427.5 DEWPOINT (MEAN C) 4.0 4.6 6.1 9.9 15.8 17.8 20.5 21.1 19.5 17.0 12.4 8.2 13.1 MIXING RATIO (G/KG) 5.19 5.34 5.92 7.59 11.42 12.92 15.40 15.92 14.31 12.27 8.96 6.78 10.17 VAPOUR PRESSURE (HPA) 8.37 8.67 9.59 12.27 18.28 20.57 24.36 25.16 22.74 19.67 14.47 10.97 16.26 SATURATION DEF. (HPA) 4.38 2.39 2.90 2.90 7.03 6.69 8.97 6.25 5.70 2.52 1.46 1.49 4.39 RELATIVE HUMIDITY (MEAN %) 69 80 80 82 73 77 75 81 82 89 92 89 81 RELATIVE HUMIDITY (MAX. %) 85 90 93 94 87 88 89 93 95 98 100 98 93 RELATIVE HUMIDITY (MIN. %) 55 71 68 74 62 67 64 70 66 78 80 76 69 RELATIVE HUMIDITY (MEAN% 03UTC) 75 87 90 92 85 88 89 88 92 96 98 96 90 RELATIVE HUMIDITY (MEAN% 09UTC) 61 74 74 77 64 73 67 71 70 80 80 78 72 RELATIVE HUMIDITY (MEAN% 15UTC) 79 84 82 83 78 77 76 81 82 91 94 92 83 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.9 92.2 128.6 74.6 28.9 59.3 89.7 15.0 36.0 545.5 197.8 55.7 1355.2 DAYS WITH PRECIPITATION >=10 0 4 3 2 0 2 3 0 1 7 3 2 27 DAYS WITH PRECIPITATION >= 5 4 4 6 4 1 5 4 0 4 9 6 4 51 DAYS WITH PRECIPITATION >= 1 8 8 11 12 8 6 6 7 6 16 13 7 108 DAYS WITH PRECIPITATION 9 9 18 14 9 9 8 11 6 20 15 12 140 GREATEST DAILY PRECIPITATION 8.0 31.0 53.0 33.0 6.0 26.0 48.0 3.0 12.0 180.0 135.0 23.5 180.0 DAY 16 23 3 4 21 7 12 4 14 27 21 4 DAY WITH THUNDER STORM 0 0 0 0 1 1 0 1 1 1 1 2 8 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 1 0 1 0 1 2 4 2 0 0 12 WIND DIRECTION (PREVAILING) 315 315 90 90 45 90 45 360 360 315 90 315 90 PREVAILING WIND SPEED(KNOTS) 6.9 8.3 6.1 5.9 4.9 5.8 3.9 4.9 4.3 5.0 4.6 6.2 5.4 PREVAILING WIND PERCENT 14.8 16.6 23.2 18.7 14.8 20.7 19.4 11.6 8.8 7.7 5.9 7.7 10.7 CALMS PERCENT OF WIND 47.7 44.1 38.1 32.0 43.2 31.3 31.6 57.9 63.2 64.0 72.0 64.4 52.1 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 216 239 247 239 247 2253 VECTOR WIND DIRECTION (MEAN) 328 346 36 16 8 41 24 13 10 359 33 331 15 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.6 2.0 2.3 1.9 2.2 1.9 1.0 0.8 0.5 0.2 0.4 1.2 WIND STEADINESES (MEAN %) 25.8 43.2 48.8 53.5 61.3 59.5 59.4 47.6 47.1 29.4 18.2 26.7 42.9 WIND SPEED (MEAN KNOTS) 3.1 3.7 4.1 4.3 3.1 3.7 3.2 2.1 1.7 1.7 1.1 1.5 2.8 FASTEST WIND DIRECTION 220 300 330 330 300 80 330 330 340 90 330 330 220 FASTEST WIND SPEED (KNOTS) 27 20 20 19 15 14 12 18 13 12 12 15 27 DAY 10 3 21 15 29 10 21 17 23 16 20 11 DAYS WITH SKY CLEAR (0-2)/8 15 3 7 6 6 10 17 6 15 4 4 2 95 DAYS WITH P.CLOUDY (3-6)/8 5 13 7 6 13 13 3 11 7 13 11 9 111 DAYS WITH CLOUDY (7-8)/8 11 13 17 18 12 7 11 14 8 14 15 20 160 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 0 1 DURATION OF SUNSHINE HOURS 143.7 110.0 108.6 108.3 170.8 197.2 227.6 118.6 179.6 89.4 96.9 61.1 1611.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1012.5 1019.2 1017.8 1018.5 1014.7 1011.6 1009.1 1008.7 1011.5 1017.2 1019.8 1017.9 1014.9 MAX. QFE PRESSURE IN HPA 1026.3 1036.1 1033.7 1025.5 1021.7 1022.7 1017.4 1014.7 1020.9 1030.2 1030.7 1028.7 1036.1 DAY-HOUR 1- 6 5- 9 26- 9 6- 6 23- 6 8- 3 12- 9 27- 6 17- 9 30- 6 21- 9 31- 6 MIN. QFE PRESSURE IN HPA 994.6 1005.7 994.0 1006.7 1003.7 1002.1 1001.0 998.7 1003.8 1003.7 1012.2 1003.0 994.0 DAY-HOUR 10-12 20-12 13- 3 23-12 20-12 18-15 31-15 16-18 27-21 25- 3 28-21 27-12 MEAN QNH PRESSURE IN HPA 1009.8 1016.5 1015.1 1015.7 1012.0 1008.9 1006.4 1006.0 1008.8 1014.5 1017.1 1015.2 1012.2 MAX. QNH PRESSURE IN HPA 1023.6 1033.4 1031.0 1022.8 1019.0 1020.0 1014.7 1012.0 1018.2 1027.5 1028.0 1026.0 1033.4 DAY-HOUR 1- 6 5- 9 26- 9 6- 6 23- 6 8- 3 12- 9 27- 6 17- 9 30- 6 21- 9 31- 6 MIN. QNH PRESSURE IN HPA 991.9 1003.0 991.3 1004.0 1001.0 999.4 998.3 996.0 1001.1 1001.0 1009.5 1000.3 991.3 DAY-HOUR 10-12 20-12 13- 3 23-12 20-12 18-15 31-15 16-18 27-21 25- 3 28-21 27-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.8 1009.2 1014.9 1017.4 1015.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.4 1018.6 1027.8 1028.3 1026.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 27- 6 17- 9 30- 6 21- 9 31- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.5 1001.5 1001.4 1009.8 1000.6 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 16-21 27-21 25- 3 28-21 27-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1009.2 1011.1 1016.9 1019.5 1017.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.6 1018.1 1025.3 1027.8 1027.7 ****** DAY ** ** ** ** ** ** ** 27 18 30 22 31 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.1 1004.3 1005.0 1012.7 1004.9 ****** DAY ** ** ** ** ** ** ** 17 28 25 27 11 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.5 1008.4 1014.2 1016.8 1015.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.9 1015.4 1022.6 1025.1 1025.0 ****** DAY ** ** ** ** ** ** ** 27 18 30 22 31 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.4 1001.6 1002.3 1010.0 1002.2 ****** DAY ** ** ** ** ** ** ** 17 28 25 27 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.9 1008.8 1014.5 1017.1 1015.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.3 1015.8 1022.9 1025.3 1025.2 ****** DAY ** ** ** ** ** ** ** 27 18 30 22 31 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.8 1002.0 1002.7 1010.3 1002.5 ****** DAY ** ** ** ** ** ** ** 17 28 25 27 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1012.4 1019.0 1017.5 1018.3 1014.5 1011.9 1009.5 1008.8 1011.5 1017.2 1019.8 1017.8 1014.8 MAX. QFE PRESSURE IN HPA 1025.2 1035.0 1032.5 1024.6 1020.8 1022.7 1016.0 1013.9 1018.6 1028.0 1028.8 1027.4 1035.0 DAY 19 5 26 6 23 8 13 19 17 30 21 31 MIN. QFE PRESSURE IN HPA 997.9 1006.4 994.0 1007.5 1006.9 1005.6 1002.8 1000.6 1006.4 1003.7 1012.4 1005.6 994.0 DAY 10 27 13 24 20 24 31 16 28 25 27 27 MEAN QNH PRESSURE IN HPA 1009.7 1016.3 1014.8 1015.5 1011.8 1009.2 1006.8 1006.1 1008.9 1014.5 1017.1 1015.1 1012.1 MAX. QNH PRESSURE IN HPA 1022.5 1032.3 1029.8 1021.9 1018.1 1020.0 1013.3 1011.2 1015.9 1025.3 1026.1 1024.7 1032.3 DAY 19 5 26 6 23 8 13 19 17 30 21 31 MIN. QNH PRESSURE IN HPA 995.2 1003.7 991.3 1004.8 1004.2 1002.9 1000.1 997.9 1003.7 1001.0 1009.7 1002.9 991.3 DAY 10 27 13 24 20 24 31 16 28 25 27 27 MEAN QFF PRESSURE IN HPA 1009.9 1016.5 1015.0 1015.8 1012.2 1009.3 1007.2 1006.5 1009.2 1014.9 1017.4 1015.4 1012.4 MAX. QFF PRESSURE IN HPA 1022.7 1032.5 1030.0 1022.1 1018.4 1020.3 1013.6 1011.6 1016.3 1025.6 1026.3 1024.9 1032.5 DAY 19 5 26 6 23 8 13 19 17 30 21 31 MIN. QFF PRESSURE IN HPA 995.5 1004.0 991.7 1005.1 1004.6 1003.3 1000.5 998.3 1004.1 1001.4 1010.0 1003.2 991.7 DAY 10 27 13 24 20 24 31 16 28 25 27 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1013.3 1019.9 1018.4 1019.2 1015.1 1012.0 1009.8 1009.3 1012.4 1018.2 1020.6 1018.9 1015.6 MAX. QFE PRESSURE IN HPA 1026.3 1036.0 1033.5 1025.5 1021.7 1022.5 1016.3 1014.7 1020.2 1030.2 1030.4 1028.7 1036.0 DAY 1 5 26 6 23 8 12 27 17 30 21 31 MIN. QFE PRESSURE IN HPA 997.0 1007.5 996.8 1008.3 1007.0 1006.0 1003.6 1001.8 1006.9 1004.7 1013.9 1005.7 996.8 DAY 10 20 13 24 20 5 31 16 27 25 27 27 MEAN QNH PRESSURE IN HPA 1010.6 1017.2 1015.7 1016.4 1012.3 1009.3 1007.1 1006.6 1009.7 1015.5 1017.9 1016.2 1012.9 MAX. QNH PRESSURE IN HPA 1023.6 1033.3 1030.8 1022.8 1019.0 1019.8 1013.6 1012.0 1017.5 1027.5 1027.7 1026.0 1033.3 DAY 1 5 26 6 23 8 12 27 17 30 21 31 MIN. QNH PRESSURE IN HPA 994.3 1004.8 994.1 1005.6 1004.3 1003.3 1000.9 999.1 1004.2 1002.0 1011.2 1003.0 994.1 DAY 10 20 13 24 20 5 31 16 27 25 27 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.0 1010.1 1015.8 1018.2 1016.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.4 1017.9 1027.8 1028.0 1026.2 ****** DAY ** ** ** ** ** ** ** 27 17 30 21 31 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.5 1004.6 1002.4 1011.5 1003.3 ****** DAY ** ** ** ** ** ** ** 16 27 25 27 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1012.8 1019.7 1018.2 1019.1 1015.0 1012.0 1009.5 1008.9 1012.0 1017.7 1019.9 1017.9 1015.2 MAX. QFE PRESSURE IN HPA 1026.0 1036.1 1033.7 1025.4 1021.5 1022.1 1017.4 1014.3 1020.9 1029.4 1030.7 1027.9 1036.1 DAY 1 5 26 27 23 8 12 27 17 30 21 23 MIN. QFE PRESSURE IN HPA 995.0 1006.8 998.9 1008.3 1005.5 1005.5 1003.3 1001.4 1006.4 1006.1 1013.5 1003.4 995.0 DAY 10 20 13 24 20 5 31 16 9 25 27 27 MEAN QNH PRESSURE IN HPA 1010.1 1017.0 1015.4 1016.4 1012.3 1009.3 1006.8 1006.2 1009.4 1015.0 1017.2 1015.2 1012.5 MAX. QNH PRESSURE IN HPA 1023.3 1033.4 1031.0 1022.7 1018.8 1019.4 1014.7 1011.6 1018.2 1026.7 1028.0 1025.2 1033.4 DAY 1 5 26 27 23 8 12 27 17 30 21 23 MIN. QNH PRESSURE IN HPA 992.3 1004.1 996.2 1005.6 1002.8 1002.8 1000.6 998.7 1003.7 1003.4 1010.8 1000.7 992.3 DAY 10 20 13 24 20 5 31 16 9 25 27 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.6 1009.8 1015.3 1017.7 1015.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.0 1018.6 1027.0 1028.3 1025.4 ****** DAY ** ** ** ** ** ** ** 27 17 30 21 23 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.1 1004.1 1003.8 1011.1 1001.0 ****** DAY ** ** ** ** ** ** ** 16 9 25 27 27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1011.9 1018.7 1017.3 1018.0 1014.5 1011.2 1008.7 1008.0 1011.1 1017.0 1019.2 1017.4 1014.4 MAX. QFE PRESSURE IN HPA 1024.6 1034.8 1032.8 1024.5 1020.8 1021.3 1016.9 1013.8 1019.4 1027.9 1030.1 1028.0 1034.8 DAY 1 5 26 21 22 8 12 27 17 30 21 31 MIN. QFE PRESSURE IN HPA 994.6 1005.7 1002.3 1006.7 1003.7 1003.9 1001.9 1000.0 1005.5 1006.7 1012.8 1003.0 994.6 DAY 10 20 13 23 20 18 31 16 27 25 27 27 MEAN QNH PRESSURE IN HPA 1009.2 1015.9 1014.6 1015.3 1011.8 1008.5 1006.0 1005.3 1008.4 1014.3 1016.5 1014.7 1011.7 MAX. QNH PRESSURE IN HPA 1021.9 1032.1 1030.1 1021.8 1018.1 1018.6 1014.2 1011.1 1016.7 1025.2 1027.4 1025.3 1032.1 DAY 1 5 26 21 22 8 12 27 17 30 21 31 MIN. QNH PRESSURE IN HPA 991.9 1003.0 999.6 1004.0 1001.0 1001.2 999.2 997.3 1002.8 1004.0 1010.1 1000.3 991.9 DAY 10 20 13 23 20 18 31 16 27 25 27 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.8 1008.8 1014.6 1016.8 1014.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.5 1017.1 1025.5 1027.6 1025.5 ****** DAY ** ** ** ** ** ** ** 27 17 30 21 31 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.7 1003.2 1004.4 1010.4 1000.6 ****** DAY ** ** ** ** ** ** ** 16 27 25 27 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1012.1 1019.0 1017.7 1017.9 1014.3 1010.8 1008.3 1007.6 1011.0 1016.8 1019.5 1017.9 1014.4 MAX. QFE PRESSURE IN HPA 1025.1 1035.1 1032.6 1024.7 1020.4 1021.9 1016.7 1013.7 1018.5 1027.8 1030.1 1028.5 1035.1 DAY 1 5 26 21 22 7 12 19 17 27 21 31 MIN. QFE PRESSURE IN HPA 996.1 1005.7 1002.0 1006.8 1003.9 1002.1 1001.0 999.0 1004.9 1007.5 1012.6 1004.1 996.1 DAY 10 20 12 23 20 18 31 16 8 25 28 27 MEAN QNH PRESSURE IN HPA 1009.4 1016.3 1015.0 1015.2 1011.6 1008.1 1005.7 1005.0 1008.3 1014.1 1016.8 1015.2 1011.7 MAX. QNH PRESSURE IN HPA 1022.4 1032.4 1029.9 1022.0 1017.7 1019.2 1014.0 1011.0 1015.8 1025.1 1027.4 1025.8 1032.4 DAY 1 5 26 21 22 7 12 19 17 27 21 31 MIN. QNH PRESSURE IN HPA 993.4 1003.0 999.3 1004.1 1001.2 999.4 998.3 996.3 1002.2 1004.8 1009.9 1001.4 993.4 DAY 10 20 12 23 20 18 31 16 8 25 28 27 MEAN QFF PRESSURE IN HPA 1009.7 1016.5 1015.2 1015.5 1011.8 1008.4 1006.0 1005.3 1008.6 1014.5 1017.1 1015.4 1012.0 MAX. QFF PRESSURE IN HPA 1022.6 1032.6 1030.1 1022.2 1018.1 1019.5 1014.4 1011.4 1016.2 1025.4 1027.6 1026.0 1032.6 DAY 1 5 26 21 22 7 12 19 17 27 21 31 MIN. QFF PRESSURE IN HPA 993.8 1003.3 999.6 1004.4 1001.6 999.8 998.7 996.7 1002.6 1005.2 1010.2 1001.7 993.8 DAY 10 20 12 23 20 18 31 16 8 25 28 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1009.4 1011.7 1017.2 1020.0 1018.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1014.1 1019.3 1027.7 1030.1 1028.6 ****** DAY ** ** ** ** ** ** ** 29 17 30 21 31 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.7 1004.4 1006.9 1012.7 1005.1 ****** DAY ** ** ** ** ** ** ** 16 27 24 28 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.7 1009.0 1014.5 1017.2 1015.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.4 1016.6 1025.0 1027.4 1025.9 ****** DAY ** ** ** ** ** ** ** 29 17 30 21 31 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.0 1001.7 1004.2 1010.0 1002.4 ****** DAY ** ** ** ** ** ** ** 16 27 24 28 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.1 1009.4 1014.8 1017.5 1015.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.8 1017.0 1025.3 1027.6 1026.1 ****** DAY ** ** ** ** ** ** ** 29 17 30 21 31 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.5 1002.1 1004.6 1010.3 1002.7 ****** DAY ** ** ** ** ** ** ** 16 27 24 28 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1009.2 1011.3 1017.0 1019.8 1017.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.6 1018.7 1026.6 1029.8 1027.5 ****** DAY ** ** ** ** ** ** ** 26 17 30 21 19 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.7 1003.8 1006.1 1012.2 1004.9 ****** DAY ** ** ** ** ** ** ** 16 27 24 28 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.6 1008.6 1014.3 1017.1 1015.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.9 1016.0 1023.9 1027.1 1024.8 ****** DAY ** ** ** ** ** ** ** 26 17 30 21 19 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.0 1001.1 1003.4 1009.5 1002.2 ****** DAY ** ** ** ** ** ** ** 16 27 24 28 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.0 1009.0 1014.7 1017.4 1015.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.3 1016.4 1024.2 1027.3 1025.0 ****** DAY ** ** ** ** ** ** ** 26 17 30 21 19 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.5 1001.5 1003.8 1009.8 1002.5 ****** DAY ** ** ** ** ** ** ** 16 27 24 28 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.1 3.5 6.5 10.5 16.3 22.1 22.9 24.1 21.1 17.2 11.0 10.9 14.2 MINIMUN AIR TEMPERATURE (C) 1.7 0.8 5.0 8.0 13.2 17.9 19.6 20.5 16.9 14.0 6.6 7.5 11.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 10 15 2 0 0 0 28 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH FREEZING MIN.<= 0 12 14 3 0 0 0 0 0 0 0 0 0 29 TEMPERATURE RECORDS LOWEST(C) -5.0 -3.0 -1.0 3.0 9.0 12.0 16.0 18.0 12.0 7.0 3.0 3.0 -5.0 DAY 7 12 25 15 7 1 7 1 13 31 20 17 MAXIMUM AIR TEMPERATURE (C) 7.1 6.2 8.2 13.5 19.5 25.7 26.3 27.6 24.8 20.6 15.4 14.7 17.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 0 2 2 0 0 0 4 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.0 11.0 12.0 22.0 27.0 29.0 29.0 30.0 30.0 25.0 22.0 20.0 30.0 DAY 14 1 31 17 23 10 13 22 6 1 1 18 DIF. BETWEEN (MAX.-MIN.) (C) 5.4 5.4 3.2 5.5 6.3 7.8 6.7 7.1 7.9 6.6 8.8 7.2 6.5 MEAN DAILY TEMP. (MDT) (C) 4.4 3.5 6.6 10.7 16.3 21.8 23.0 24.0 20.9 17.3 11.0 11.1 14.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 40.5 62.5 94.5 28.0 1.0 0.0 0.0 226.5 HEATING DEG. DAYS(BASE 18 0C) 409.5 405.5 354.0 218.0 59.0 2.0 0.0 0.0 6.0 42.5 199.0 214.5 1910.0 DEWPOINT (MEAN C) 2.4 1.7 5.7 8.7 13.8 18.9 19.1 20.7 18.0 15.1 8.6 8.4 11.8 MIXING RATIO (G/KG) 4.56 4.29 5.69 7.05 9.93 13.84 13.94 15.45 13.06 10.83 6.99 6.88 9.37 VAPOUR PRESSURE (HPA) 7.44 7.02 9.24 11.42 15.97 21.99 22.19 24.57 20.90 17.45 11.38 11.16 15.06 SATURATION DEF. (HPA) 0.94 0.92 0.51 1.51 2.87 5.04 6.00 5.73 4.73 2.49 2.07 2.04 2.90 RELATIVE HUMIDITY (MEAN %) 89 89 95 90 86 82 80 82 83 88 86 86 86 RELATIVE HUMIDITY (MAX. %) 97 97 99 98 96 94 91 93 94 97 96 96 96 RELATIVE HUMIDITY (MIN. %) 78 78 88 78 74 70 68 70 71 76 71 72 75 RELATIVE HUMIDITY (MEAN% 03UTC) 94 92 98 94 90 87 82 88 88 93 90 89 90 RELATIVE HUMIDITY (MEAN% 09UTC) 81 83 91 83 79 77 73 74 75 80 76 77 79 RELATIVE HUMIDITY (MEAN% 15UTC) 91 90 94 89 82 77 76 79 82 91 91 89 86 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 220.1 92.5 141.0 48.4 56.6 59.9 76.5 16.5 167.0 253.3 111.8 108.4 1352.0 DAYS WITH PRECIPITATION >=10 7 3 4 2 2 3 2 0 5 4 5 1 38 DAYS WITH PRECIPITATION >= 5 8 7 7 3 4 4 4 1 6 6 8 4 62 DAYS WITH PRECIPITATION >= 1 11 13 17 12 7 4 9 6 8 16 9 7 119 DAYS WITH PRECIPITATION 15 17 21 19 16 5 13 9 10 20 13 15 173 GREATEST DAILY PRECIPITATION 72.0 35.4 35.0 13.4 22.0 25.0 38.0 6.0 42.0 72.0 40.0 82.0 82.0 DAY 3 11 23 6 27 25 31 1 8 14 15 15 DAY WITH THUNDER STORM 0 0 1 1 4 2 2 1 4 4 0 0 19 DAYS WITH SNOW OR SLEET 5 7 2 0 0 0 0 0 0 0 0 0 14 DAYS WITH DUST 0 0 0 3 0 0 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 315 315 315 315 315 90 225 225 225 315 225 90 315 PREVAILING WIND SPEED(KNOTS) 6.3 7.4 5.2 9.3 8.6 6.0 4.0 3.1 3.6 7.2 3.0 4.2 7.4 PREVAILING WIND PERCENT 14.6 16.6 14.1 13.8 12.9 14.2 10.9 10.1 20.5 11.7 10.8 10.1 11.5 CALMS PERCENT OF WIND 68.0 64.6 61.3 61.5 50.8 49.4 50.4 47.0 31.4 44.1 56.3 58.3 53.5 NO. OF WIND OBSERVATION 247 223 248 239 248 239 248 247 239 247 240 247 2912 VECTOR WIND DIRECTION (MEAN) 320 332 13 351 2 22 335 2 313 319 309 360 348 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.5 0.6 1.3 1.3 1.4 0.7 0.8 0.7 0.4 0.3 0.4 0.8 WIND STEADINESES (MEAN %) 50.0 71.4 35.3 46.4 44.8 42.4 28.0 33.3 23.3 15.4 17.6 21.1 33.3 WIND SPEED (MEAN KNOTS) 1.6 2.1 1.7 2.8 2.9 3.3 2.5 2.4 3.0 2.6 1.7 1.9 2.4 FASTEST WIND DIRECTION 320 320 310 320 320 140 330 320 330 320 300 320 140 FASTEST WIND SPEED (KNOTS) 15 26 15 25 20 30 17 11 18 18 18 16 30 DAY 20 13 6 2 23 17 23 8 20 7 9 5 DAYS WITH SKY CLEAR (0-2)/8 3 6 0 5 8 19 7 11 12 5 12 7 95 DAYS WITH P.CLOUDY (3-6)/8 10 2 1 4 6 7 9 9 4 7 10 5 74 DAYS WITH CLOUDY (7-8)/8 18 20 30 21 17 4 15 11 14 19 8 19 196 DAYS WITH VISIBILITY =< 2 KM 2 0 3 9 3 0 0 0 1 5 5 1 29 DURATION OF SUNSHINE HOURS 62.6 66.3 17.1 70.9 163.6 264.5 143.1 166.9 148.7 92.2 153.1 80.5 1429.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1023.8 1026.9 1020.5 1019.7 1017.5 1011.4 1013.1 1014.2 1017.6 1019.8 1024.0 1020.0 1019.0 MAX. QFE PRESSURE IN HPA 1037.9 1038.4 1034.8 1031.0 1026.2 1021.4 1020.8 1021.5 1029.5 1032.3 1032.8 1029.0 1038.4 DAY-HOUR 6- 0 10-21 11-21 4- 6 27-18 1- 9 2-18 31- 6 13-12 26- 6 10- 6 6-21 MIN. QFE PRESSURE IN HPA 1010.4 1011.2 1002.6 996.7 1004.1 999.9 999.9 1005.7 1006.6 1004.3 1010.8 1006.3 996.7 DAY-HOUR 19-18 13-12 19-12 17-12 14-21 24- 0 14- 0 14-18 7- 9 29- 3 7- 0 31-12 MEAN QNH PRESSURE IN HPA 1021.1 1024.2 1017.8 1016.9 1014.7 1008.7 1010.4 1011.5 1014.9 1017.1 1021.3 1017.3 1016.3 MAX. QNH PRESSURE IN HPA 1035.2 1035.7 1032.1 1028.3 1023.5 1018.7 1018.1 1018.8 1026.8 1029.6 1030.1 1026.3 1035.7 DAY-HOUR 6- 0 10-21 11-21 4- 6 27-18 1- 9 2-18 31- 6 13-12 26- 6 10- 6 6-21 MIN. QNH PRESSURE IN HPA 1007.7 1008.5 999.9 994.0 1001.4 997.2 997.2 1003.0 1003.9 1001.6 1008.1 1003.6 994.0 DAY-HOUR 19-18 13-12 19-12 17-12 14-21 24- 0 14- 0 14-18 7- 9 29- 3 7- 0 31-12 MEAN QFF PRESSURE IN HPA 1021.3 1024.4 1018.0 1017.2 1015.1 1009.1 1010.7 1011.9 1015.1 1017.4 1022.1 1017.5 1016.6 MAX. QFF PRESSURE IN HPA 1035.3 1035.8 1032.3 1028.5 1023.8 1019.0 1018.4 1019.2 1027.1 1029.9 1030.3 1026.5 1035.8 DAY-HOUR 6- 0 10-21 11-21 4- 6 27-18 1- 9 2-18 31- 9 13-12 26- 6 10- 6 6-21 MIN. QFF PRESSURE IN HPA 1007.9 1008.7 1000.2 994.3 1001.8 997.6 997.6 1003.4 1004.3 1001.9 1010.4 1003.9 994.3 DAY-HOUR 19-18 13-12 19-12 17-12 14-21 24- 0 14- 0 14-18 7- 9 29- 3 8-12 31-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1023.9 1026.5 1020.2 1018.8 1016.9 1011.0 1012.7 1013.9 1017.3 1019.6 1023.7 1019.9 1018.7 MAX. QFE PRESSURE IN HPA 1037.9 1037.0 1033.5 1029.4 1025.3 1020.1 1019.1 1020.4 1028.0 1029.8 1032.0 1029.0 1037.9 DAY 6 11 12 4 17 1 3 31 13 26 18 7 MIN. QFE PRESSURE IN HPA 1010.9 1013.8 1005.5 1001.5 1006.7 999.9 999.9 1006.3 1007.2 1005.5 1010.8 1008.9 999.9 DAY 20 13 20 18 3 24 14 4 7 29 7 24 MEAN QNH PRESSURE IN HPA 1021.2 1023.7 1017.5 1016.1 1014.2 1008.3 1010.0 1011.2 1014.6 1016.9 1021.0 1017.2 1016.0 MAX. QNH PRESSURE IN HPA 1035.2 1034.3 1030.8 1026.7 1022.6 1017.4 1016.4 1017.7 1025.3 1027.1 1029.3 1026.3 1035.2 DAY 6 11 12 4 17 1 3 31 13 26 18 7 MIN. QNH PRESSURE IN HPA 1008.2 1011.1 1002.8 998.8 1004.0 997.2 997.2 1003.6 1004.5 1002.8 1008.1 1006.2 997.2 DAY 20 13 20 18 3 24 14 4 7 29 7 24 MEAN QFF PRESSURE IN HPA 1021.4 1023.9 1017.7 1016.4 1014.5 1008.7 1010.4 1011.6 1015.0 1017.3 1021.7 1017.5 1016.3 MAX. QFF PRESSURE IN HPA 1035.3 1034.4 1031.0 1026.9 1022.9 1017.7 1016.7 1018.1 1025.6 1027.4 1029.5 1026.5 1035.3 DAY 6 11 12 4 17 1 3 31 14 26 18 7 MIN. QFF PRESSURE IN HPA 1008.4 1011.3 1003.1 999.2 1004.3 997.6 997.6 1004.0 1004.9 1003.1 1011.6 1006.5 997.6 DAY 20 13 20 18 3 24 14 4 7 29 1 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1023.7 1026.5 1020.6 1019.6 1017.4 1011.7 1013.5 1014.6 1017.8 1020.0 1023.9 1020.0 1019.1 MAX. QFE PRESSURE IN HPA 1037.5 1037.0 1033.9 1029.9 1025.4 1020.6 1019.1 1020.9 1028.8 1030.9 1032.1 1029.0 1037.5 DAY 6 11 12 4 11 1 3 31 13 26 10 7 MIN. QFE PRESSURE IN HPA 1011.2 1012.9 1006.6 1003.4 1006.8 1000.6 1001.1 1008.1 1007.8 1004.3 1011.3 1007.2 1000.6 DAY 20 13 20 17 14 24 14 15 7 29 7 31 MEAN QNH PRESSURE IN HPA 1021.0 1023.8 1017.9 1016.9 1014.7 1009.1 1010.8 1011.9 1015.1 1017.2 1021.2 1017.3 1016.4 MAX. QNH PRESSURE IN HPA 1034.8 1034.3 1031.2 1027.2 1022.7 1017.9 1016.4 1018.2 1026.1 1028.2 1029.4 1026.3 1034.8 DAY 6 11 12 4 11 1 3 31 13 26 10 7 MIN. QNH PRESSURE IN HPA 1008.5 1010.2 1003.9 1000.7 1004.1 997.9 998.4 1005.4 1005.1 1001.6 1008.6 1004.5 997.9 DAY 20 13 20 17 14 24 14 15 7 29 7 31 MEAN QFF PRESSURE IN HPA 1021.2 1024.0 1018.1 1017.2 1015.0 1009.4 1011.2 1012.3 1015.4 1017.6 1021.9 1017.6 1016.7 MAX. QFF PRESSURE IN HPA 1034.9 1034.4 1031.4 1027.4 1023.0 1018.2 1016.7 1018.6 1026.4 1028.5 1029.6 1026.5 1034.9 DAY 6 11 12 4 11 1 3 31 13 26 10 7 MIN. QFF PRESSURE IN HPA 1008.7 1010.4 1004.2 1001.0 1004.5 998.3 998.8 1005.8 1005.5 1001.9 1011.9 1004.8 998.3 DAY 20 13 20 17 14 24 14 15 7 29 8 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1024.7 1027.7 1021.7 1020.5 1017.8 1012.2 1013.8 1015.1 1018.1 1020.9 1024.9 1020.9 1019.9 MAX. QFE PRESSURE IN HPA 1037.6 1037.9 1034.6 1031.0 1025.9 1021.3 1018.7 1021.5 1027.9 1032.3 1032.8 1029.0 1037.9 DAY 6 11 12 4 21 1 26 31 14 26 10 7 MIN. QFE PRESSURE IN HPA 1013.0 1012.9 1007.8 1002.1 1006.7 1002.6 1001.4 1008.2 1007.3 1005.3 1012.1 1008.2 1001.4 DAY 19 13 19 17 14 24 14 4 7 29 7 31 MEAN QNH PRESSURE IN HPA 1022.0 1025.0 1019.0 1017.7 1015.1 1009.5 1011.1 1012.4 1015.4 1018.2 1022.1 1018.1 1017.1 MAX. QNH PRESSURE IN HPA 1034.9 1035.2 1031.9 1028.3 1023.2 1018.6 1016.0 1018.8 1025.2 1029.6 1030.1 1026.3 1035.2 DAY 6 11 12 4 21 1 26 31 14 26 10 7 MIN. QNH PRESSURE IN HPA 1010.3 1010.2 1005.1 999.4 1004.0 999.9 998.7 1005.5 1004.6 1002.6 1009.4 1005.5 998.7 DAY 19 13 19 17 14 24 14 4 7 29 7 31 MEAN QFF PRESSURE IN HPA 1022.2 1025.2 1019.2 1018.0 1015.4 1009.9 1011.5 1012.8 1015.8 1018.5 1022.9 1018.4 1017.5 MAX. QFF PRESSURE IN HPA 1035.0 1035.3 1032.1 1028.5 1023.5 1018.9 1016.4 1019.2 1025.5 1029.9 1030.3 1026.5 1035.3 DAY 6 11 12 4 21 1 26 31 14 26 10 7 MIN. QFF PRESSURE IN HPA 1010.5 1010.4 1005.4 999.7 1004.4 1000.3 999.1 1005.9 1005.0 1002.9 1012.1 1005.8 999.1 DAY 19 13 19 17 14 24 14 4 7 29 8 31 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1024.2 1027.4 1021.3 1020.2 1017.9 1012.1 1013.7 1014.8 1017.8 1020.4 1024.3 1020.2 1019.5 MAX. QFE PRESSURE IN HPA 1036.2 1037.9 1033.8 1030.1 1025.8 1021.4 1019.1 1021.5 1027.2 1031.9 1032.2 1027.9 1037.9 DAY 4 10 12 4 21 1 2 31 12 26 10 7 MIN. QFE PRESSURE IN HPA 1012.3 1012.4 1006.7 1000.4 1007.0 1003.1 1003.5 1007.5 1006.6 1005.6 1011.9 1006.6 1000.4 DAY 20 13 19 17 14 24 14 3 7 29 7 31 MEAN QNH PRESSURE IN HPA 1021.4 1024.7 1018.6 1017.5 1015.2 1009.4 1011.0 1012.1 1015.1 1017.7 1021.6 1017.5 1016.8 MAX. QNH PRESSURE IN HPA 1033.5 1035.2 1031.1 1027.4 1023.1 1018.7 1016.4 1018.8 1024.5 1029.2 1029.5 1025.2 1035.2 DAY 4 10 12 4 21 1 2 31 12 26 10 7 MIN. QNH PRESSURE IN HPA 1009.6 1009.7 1004.0 997.7 1004.3 1000.4 1000.8 1004.8 1003.9 1002.9 1009.2 1003.9 997.7 DAY 20 13 19 17 14 24 14 3 7 29 7 31 MEAN QFF PRESSURE IN HPA 1021.5 1024.9 1018.5 1017.8 1015.6 1009.8 1011.4 1012.5 1015.4 1017.9 1022.7 1017.8 1017.2 MAX. QFF PRESSURE IN HPA 1033.6 1035.3 1031.3 1027.6 1023.4 1019.0 1016.8 1019.2 1024.8 1029.5 1029.7 1025.4 1035.3 DAY 4 10 12 4 21 1 2 31 12 26 10 7 MIN. QFF PRESSURE IN HPA 1009.9 1009.9 1004.3 998.0 1004.7 1000.8 1001.2 1005.2 1004.3 1003.2 1011.9 1004.2 998.0 DAY 20 13 19 17 14 24 14 3 7 29 8 31 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1023.2 1026.3 1019.8 1019.3 1017.4 1011.4 1012.7 1013.9 1017.3 1019.4 1023.5 1019.3 1018.6 MAX. QFE PRESSURE IN HPA 1035.2 1037.1 1032.5 1028.6 1025.3 1021.0 1019.3 1020.9 1029.5 1031.2 1031.7 1026.9 1037.1 DAY 4 10 23 3 21 1 2 31 13 26 17 6 MIN. QFE PRESSURE IN HPA 1011.1 1011.2 1002.6 996.7 1005.6 1003.2 1003.5 1006.0 1007.2 1008.7 1011.6 1006.3 996.7 DAY 19 13 19 17 14 23 14 3 7 29 7 31 MEAN QNH PRESSURE IN HPA 1020.5 1023.5 1017.1 1016.6 1014.7 1008.7 1010.0 1011.2 1014.6 1016.6 1020.8 1016.5 1015.9 MAX. QNH PRESSURE IN HPA 1032.5 1034.4 1029.8 1025.9 1022.6 1018.3 1016.6 1018.2 1026.8 1028.5 1029.0 1024.2 1034.4 DAY 4 10 23 3 21 1 2 31 13 26 17 6 MIN. QNH PRESSURE IN HPA 1008.4 1008.5 999.9 994.0 1002.9 1000.5 1000.8 1003.3 1004.5 1006.0 1008.9 1003.6 994.0 DAY 19 13 19 17 14 23 14 3 7 29 7 31 MEAN QFF PRESSURE IN HPA 1020.7 1023.7 1017.3 1016.8 1015.0 1009.1 1010.4 1011.6 1015.0 1017.0 1021.5 1016.8 1016.2 MAX. QFF PRESSURE IN HPA 1032.6 1034.5 1029.9 1026.1 1022.9 1018.6 1017.0 1018.6 1027.1 1028.8 1029.2 1024.5 1034.5 DAY 4 10 23 3 21 1 2 31 13 26 17 6 MIN. QFF PRESSURE IN HPA 1008.6 1008.7 1000.2 994.3 1003.3 1000.9 1001.2 1003.7 1004.9 1006.3 1010.4 1003.9 994.3 DAY 19 13 19 17 14 23 14 3 7 29 8 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1023.7 1026.7 1020.2 1019.2 1017.2 1010.7 1012.3 1013.5 1017.3 1019.2 1023.8 1019.7 1018.6 MAX. QFE PRESSURE IN HPA 1035.3 1037.8 1032.8 1028.3 1025.2 1020.2 1019.8 1020.2 1029.5 1031.0 1031.7 1028.8 1037.8 DAY 4 10 23 3 27 1 2 30 13 26 15 6 MIN. QFE PRESSURE IN HPA 1011.8 1013.5 1003.5 998.7 1004.3 1002.0 1002.5 1005.8 1008.4 1009.5 1011.6 1007.5 998.7 DAY 13 13 19 1 14 23 13 3 19 19 7 13 MEAN QNH PRESSURE IN HPA 1021.0 1023.9 1017.5 1016.5 1014.5 1008.0 1009.6 1010.8 1014.6 1016.5 1021.1 1017.0 1015.9 MAX. QNH PRESSURE IN HPA 1032.6 1035.1 1030.1 1025.6 1022.5 1017.5 1017.1 1017.5 1026.8 1028.3 1029.0 1026.1 1035.1 DAY 4 10 23 3 27 1 2 30 13 26 15 6 MIN. QNH PRESSURE IN HPA 1009.1 1010.8 1000.8 996.0 1001.6 999.3 999.8 1003.1 1005.7 1006.8 1008.9 1004.8 996.0 DAY 13 13 19 1 14 23 13 3 19 19 7 13 MEAN QFF PRESSURE IN HPA 1021.2 1024.1 1017.7 1016.7 1014.8 1008.4 1010.0 1011.2 1014.9 1016.8 1022.1 1017.3 1016.3 MAX. QFF PRESSURE IN HPA 1032.7 1035.2 1030.2 1025.8 1022.8 1017.8 1017.5 1017.9 1027.1 1028.6 1029.2 1026.3 1035.2 DAY 4 10 23 3 27 1 2 30 13 26 15 6 MIN. QFF PRESSURE IN HPA 1009.3 1011.0 1001.1 996.3 1002.0 999.7 1000.2 1003.5 1006.1 1007.1 1010.7 1005.1 996.3 DAY 13 13 19 1 14 23 13 3 19 19 8 13 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1023.7 1027.1 1020.4 1020.0 1017.8 1011.3 1013.1 1014.1 1017.9 1019.7 1024.1 1020.0 1019.1 MAX. QFE PRESSURE IN HPA 1036.6 1038.0 1033.8 1029.4 1026.2 1020.4 1020.8 1020.9 1029.3 1030.8 1032.7 1028.8 1038.0 DAY 5 10 11 3 27 1 2 30 13 26 15 6 MIN. QFE PRESSURE IN HPA 1010.4 1015.9 1003.8 1000.5 1004.3 1001.3 1002.1 1005.7 1009.6 1008.7 1012.9 1010.2 1000.5 DAY 19 8 19 17 14 23 13 14 19 19 6 30 MEAN QNH PRESSURE IN HPA 1021.0 1024.3 1017.7 1017.2 1015.1 1008.6 1010.4 1011.4 1015.2 1016.9 1021.4 1017.3 1016.4 MAX. QNH PRESSURE IN HPA 1033.9 1035.3 1031.1 1026.7 1023.5 1017.7 1018.1 1018.2 1026.6 1028.1 1030.0 1026.1 1035.3 DAY 5 10 11 3 27 1 2 30 13 26 15 6 MIN. QNH PRESSURE IN HPA 1007.7 1013.2 1001.1 997.8 1001.6 998.6 999.4 1003.0 1006.9 1006.0 1010.2 1007.5 997.8 DAY 19 8 19 17 14 23 13 14 19 19 6 30 MEAN QFF PRESSURE IN HPA 1021.2 1024.5 1018.0 1017.5 1015.4 1009.0 1010.8 1011.8 1015.1 1017.3 1022.0 1017.6 1016.7 MAX. QFF PRESSURE IN HPA 1034.0 1035.4 1031.3 1026.9 1023.8 1018.0 1018.4 1018.6 1026.4 1028.4 1030.2 1026.3 1035.4 DAY 5 10 11 3 27 1 2 30 12 26 15 6 MIN. QFF PRESSURE IN HPA 1007.9 1013.4 1001.4 998.1 1002.0 999.0 999.8 1003.4 1007.3 1006.4 1010.6 1007.8 998.1 DAY 19 8 19 17 14 23 13 14 19 19 7 30 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1023.5 1027.3 1020.2 1019.8 1017.5 1011.0 1012.9 1013.8 1017.3 1019.5 1024.0 1019.9 1018.9 MAX. QFE PRESSURE IN HPA 1037.1 1038.4 1034.8 1029.4 1026.2 1020.0 1020.0 1020.9 1029.0 1029.3 1032.0 1029.0 1038.4 DAY 5 10 11 3 27 25 2 30 13 26 15 6 MIN. QFE PRESSURE IN HPA 1010.8 1015.6 1005.4 1000.7 1004.1 1000.7 1000.8 1005.9 1007.9 1007.9 1011.7 1008.9 1000.7 DAY 13 12 19 17 14 23 13 14 6 28 6 30 MEAN QNH PRESSURE IN HPA 1020.8 1024.5 1017.5 1017.1 1014.7 1008.3 1010.2 1011.1 1014.6 1016.8 1021.3 1017.2 1016.2 MAX. QNH PRESSURE IN HPA 1034.4 1035.7 1032.1 1026.7 1023.5 1017.3 1017.3 1018.2 1026.3 1026.6 1029.3 1026.3 1035.7 DAY 5 10 11 3 27 25 2 30 13 26 15 6 MIN. QNH PRESSURE IN HPA 1008.1 1012.9 1002.7 998.0 1001.4 998.0 998.1 1003.2 1005.2 1005.2 1009.0 1006.2 998.0 DAY 13 12 19 17 14 23 13 14 6 28 6 30 MEAN QFF PRESSURE IN HPA 1021.0 1024.7 1017.7 1017.4 1015.1 1008.7 1010.5 1011.5 1014.6 1017.1 1022.0 1017.5 1016.5 MAX. QFF PRESSURE IN HPA 1034.5 1035.8 1032.3 1026.9 1023.8 1017.6 1017.7 1018.6 1026.1 1026.9 1029.5 1026.5 1035.8 DAY 5 10 11 3 27 25 2 30 12 26 15 6 MIN. QFF PRESSURE IN HPA 1008.3 1013.1 1003.0 998.4 1001.8 998.4 998.5 1003.6 1005.6 1005.5 1011.6 1006.5 998.4 DAY 13 12 19 17 14 23 13 14 6 28 7 30 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.9 9.2 10.4 13.6 18.9 21.4 24.6 24.9 21.1 17.7 14.7 9.1 16.1 MINIMUN AIR TEMPERATURE (C) 4.9 5.9 7.2 10.2 14.7 17.7 20.4 21.7 18.0 15.0 11.0 5.9 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 15 27 2 1 0 0 47 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) 0.0 2.0 3.0 6.0 10.0 13.0 16.0 20.0 13.0 10.0 8.0 1.0 0.0 DAY 29 2 10 26 9 13 2 20 13 26 1 16 MAXIMUM AIR TEMPERATURE (C) 11.2 13.5 13.6 17.3 22.7 24.6 28.5 28.5 24.4 20.9 18.7 13.1 19.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 10 10 0 0 0 0 20 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 24.0 28.0 24.0 28.0 28.0 31.0 30.0 28.0 25.0 25.0 19.0 31.0 DAY 18 19 18 19 23 30 11 5 7 1 3 6 DIF. BETWEEN (MAX.-MIN.) (C) 6.3 7.6 6.4 7.1 8.0 6.9 8.1 6.8 6.4 5.9 7.7 7.2 7.1 MEAN DAILY TEMP. (MDT) (C) 8.1 9.7 10.4 13.7 18.7 21.1 24.4 25.1 21.2 17.9 14.8 9.5 16.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 4.5 25.5 106.0 127.0 24.5 2.5 0.0 0.0 290.0 HEATING DEG. DAYS(BASE 18 0C) 308.0 233.5 236.0 128.5 12.5 4.5 0.0 0.0 0.0 26.0 94.5 263.5 1307.0 DEWPOINT (MEAN C) 5.6 6.8 7.4 11.1 15.7 17.8 20.2 21.4 18.1 15.1 12.6 6.7 13.2 MIXING RATIO (G/KG) 5.71 6.13 6.41 8.26 11.25 12.86 15.03 16.16 13.14 10.74 9.06 6.18 10.08 VAPOUR PRESSURE (HPA) 9.29 9.95 10.40 13.35 18.00 20.53 23.83 25.55 21.00 17.30 14.66 10.05 16.16 SATURATION DEF. (HPA) 1.48 1.82 2.73 2.42 4.18 5.25 7.44 6.18 4.35 3.20 2.22 1.80 3.59 RELATIVE HUMIDITY (MEAN %) 87 86 83 86 82 81 78 82 84 85 88 86 84 RELATIVE HUMIDITY (MAX. %) 97 97 95 97 94 94 92 92 94 96 97 97 95 RELATIVE HUMIDITY (MIN. %) 73 72 70 72 69 68 64 70 72 73 75 71 71 RELATIVE HUMIDITY (MEAN% 03UTC) 92 90 90 91 88 86 83 87 92 92 92 93 90 RELATIVE HUMIDITY (MEAN% 09UTC) 76 78 75 80 75 72 69 73 75 74 78 74 75 RELATIVE HUMIDITY (MEAN% 15UTC) 90 87 81 83 77 76 74 77 81 88 92 90 83 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 190.0 40.6 57.1 64.6 28.1 52.2 58.4 101.2 98.0 142.7 159.0 265.0 1256.9 DAYS WITH PRECIPITATION >=10 6 1 3 1 0 1 2 1 5 4 4 6 34 DAYS WITH PRECIPITATION >= 5 9 4 3 2 2 1 4 3 5 5 6 8 52 DAYS WITH PRECIPITATION >= 1 12 7 11 8 7 7 5 6 8 9 9 11 100 DAYS WITH PRECIPITATION 13 13 15 14 13 10 6 10 12 14 11 15 146 GREATEST DAILY PRECIPITATION 61.0 11.0 21.0 42.0 8.0 39.0 27.6 75.0 30.0 73.0 71.0 114.0 114.0 DAY 1 25 24 21 21 10 24 29 16 18 13 8 DAY WITH THUNDER STORM 0 0 1 4 5 1 5 0 0 0 1 0 17 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 315 90 315 90 315 360 360 315 225 315 225 315 315 PREVAILING WIND SPEED(KNOTS) 7.5 5.9 7.6 4.7 8.9 5.8 7.0 7.8 3.5 7.3 2.5 6.4 7.6 PREVAILING WIND PERCENT 10.1 15.7 21.9 20.1 14.6 13.3 14.2 15.4 8.4 17.8 12.1 14.1 13.3 CALMS PERCENT OF WIND 57.3 48.4 46.2 44.4 42.9 44.6 42.9 40.9 54.8 44.5 48.5 53.2 47.4 NO. OF WIND OBSERVATION 248 223 247 239 247 240 247 247 239 247 239 248 2911 VECTOR WIND DIRECTION (MEAN) 321 44 334 8 3 18 350 332 346 319 311 293 345 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.7 1.5 1.4 1.3 1.3 1.7 1.9 0.6 1.5 0.6 0.7 1.0 WIND STEADINESES (MEAN %) 30.0 25.0 50.0 46.7 40.6 50.0 53.1 59.4 28.6 57.7 28.6 33.3 37.0 WIND SPEED (MEAN KNOTS) 2.0 2.8 3.0 3.0 3.2 2.6 3.2 3.2 2.1 2.6 2.1 2.1 2.7 FASTEST WIND DIRECTION 310 310 310 310 330 360 330 300 320 310 300 310 310 FASTEST WIND SPEED (KNOTS) 18 35 18 32 28 15 17 16 15 18 28 13 35 DAY 31 19 2 19 23 10 11 31 24 1 3 20 DAYS WITH SKY CLEAR (0-2)/8 4 5 3 2 9 12 13 6 7 5 7 7 80 DAYS WITH P.CLOUDY (3-6)/8 12 8 6 9 11 6 8 11 7 9 12 9 108 DAYS WITH CLOUDY (7-8)/8 15 15 22 19 11 12 10 14 16 17 11 15 177 DAYS WITH VISIBILITY =< 2 KM 1 1 2 8 0 0 2 0 2 1 2 2 21 DURATION OF SUNSHINE HOURS 106.0 99.4 68.4 101.6 189.6 171.9 214.0 118.2 97.3 104.1 119.7 111.6 1501.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1022.0 1019.4 1020.3 1019.6 1013.6 1014.0 1010.4 1009.9 1016.0 1019.8 1021.0 1022.8 1017.4 MAX. QFE PRESSURE IN HPA 1031.7 1029.8 1031.9 1034.0 1024.5 1027.1 1016.8 1022.7 1026.7 1031.4 1035.2 1030.8 1035.2 DAY-HOUR 2- 6 5-21 5- 6 22- 6 9- 9 11- 3 31-18 29-18 18- 9 31- 9 14- 6 27- 6 MIN. QFE PRESSURE IN HPA 1010.0 1001.3 999.9 997.3 1001.2 1005.9 1003.9 997.9 1007.4 1005.2 1008.5 1006.1 997.3 DAY-HOUR 30- 3 19- 3 19- 0 19-18 15-12 20-15 13-15 27- 0 6-15 14-12 3-18 11- 0 MEAN QNH PRESSURE IN HPA 1019.3 1016.7 1017.6 1016.9 1010.9 1011.3 1007.7 1007.2 1013.3 1017.1 1018.3 1020.0 1014.7 MAX. QNH PRESSURE IN HPA 1029.0 1027.1 1029.2 1031.3 1021.8 1024.4 1014.1 1020.0 1024.0 1028.7 1032.5 1028.1 1032.5 DAY-HOUR 2- 6 5-21 5- 6 22- 6 9- 9 11- 3 31-18 29-18 18- 9 31- 9 14- 6 27- 6 MIN. QNH PRESSURE IN HPA 1007.3 998.6 997.2 994.6 998.5 1003.2 1001.2 995.2 1004.7 1002.5 1005.8 1003.4 994.6 DAY-HOUR 30- 3 19- 3 19- 0 19-18 15-12 20-15 13-15 27- 0 6-15 14-12 3-18 11- 0 MEAN QFF PRESSURE IN HPA 1019.6 1017.0 1017.9 1017.2 1011.2 1011.6 1008.1 1007.6 1013.7 1017.5 1018.6 1020.3 1015.0 MAX. QFF PRESSURE IN HPA 1029.2 1027.3 1029.4 1031.5 1022.1 1024.7 1014.5 1020.3 1024.3 1029.0 1032.7 1028.3 1032.7 DAY-HOUR 2- 6 5-21 5- 6 22- 6 9- 9 11- 3 31-18 29-18 18- 9 31- 9 14- 6 27- 6 MIN. QFF PRESSURE IN HPA 1007.5 998.9 997.6 995.0 998.9 1003.6 1001.6 995.6 1005.1 1002.9 1006.1 1003.7 995.0 DAY-HOUR 30- 3 19- 3 19- 0 19-18 15-12 20-15 13-15 27- 0 6-15 14-12 3-18 11- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1021.7 1019.0 1019.7 1018.8 1013.2 1014.0 1009.9 1009.7 1015.8 1019.5 1020.8 1022.5 1017.0 MAX. QFE PRESSURE IN HPA 1029.8 1029.0 1029.6 1033.3 1022.3 1026.6 1014.8 1020.5 1024.4 1026.7 1033.5 1030.1 1033.5 DAY 2 16 5 22 9 11 23 30 18 12 14 30 MIN. QFE PRESSURE IN HPA 1010.1 1002.3 999.9 1001.4 1004.8 1007.6 1005.4 997.9 1009.6 1005.4 1012.8 1006.1 997.9 DAY 30 19 19 20 20 20 20 27 6 6 8 11 MEAN QNH PRESSURE IN HPA 1019.0 1016.3 1017.0 1016.1 1010.5 1011.3 1007.2 1007.0 1013.1 1016.7 1018.1 1019.7 1014.3 MAX. QNH PRESSURE IN HPA 1027.1 1026.3 1026.9 1030.6 1019.6 1023.9 1012.1 1017.8 1021.7 1024.0 1030.8 1027.4 1030.8 DAY 2 16 5 22 9 11 23 30 18 12 14 30 MIN. QNH PRESSURE IN HPA 1007.4 999.6 997.2 998.7 1002.1 1004.9 1002.7 995.2 1006.9 1002.7 1010.1 1003.4 995.2 DAY 30 19 19 20 20 20 20 27 6 6 8 11 MEAN QFF PRESSURE IN HPA 1019.2 1016.5 1017.2 1016.4 1010.8 1011.6 1007.6 1007.5 1013.5 1017.1 1018.4 1020.0 1014.7 MAX. QFF PRESSURE IN HPA 1027.3 1026.5 1027.1 1030.8 1019.9 1024.2 1012.5 1018.2 1022.0 1024.3 1031.0 1027.6 1031.0 DAY 2 16 5 22 9 11 23 30 18 12 14 30 MIN. QFF PRESSURE IN HPA 1007.6 999.9 997.6 999.1 1002.5 1005.3 1003.1 995.6 1007.3 1003.1 1010.4 1003.7 995.6 DAY 30 19 19 20 20 20 20 27 6 6 8 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1021.8 1019.2 1020.2 1019.4 1013.9 1014.5 1010.7 1010.3 1016.4 1019.9 1021.1 1022.6 1017.5 MAX. QFE PRESSURE IN HPA 1030.0 1029.1 1030.4 1033.5 1022.9 1027.1 1015.1 1020.4 1025.5 1028.7 1033.8 1029.8 1033.8 DAY 2 16 5 22 9 11 23 30 18 31 14 30 MIN. QFE PRESSURE IN HPA 1010.0 1001.3 1003.9 1001.3 1005.7 1007.0 1006.4 998.3 1009.8 1005.8 1014.5 1008.5 998.3 DAY 30 19 19 19 26 20 20 27 6 6 8 11 MEAN QNH PRESSURE IN HPA 1019.1 1016.5 1017.5 1016.7 1011.2 1011.8 1008.0 1007.6 1013.7 1017.1 1018.4 1019.9 1014.8 MAX. QNH PRESSURE IN HPA 1027.3 1026.4 1027.7 1030.8 1020.2 1024.4 1012.4 1017.7 1022.8 1026.0 1031.1 1027.1 1031.1 DAY 2 16 5 22 9 11 23 30 18 31 14 30 MIN. QNH PRESSURE IN HPA 1007.3 998.6 1001.2 998.6 1003.0 1004.3 1003.7 995.6 1007.1 1003.1 1011.8 1005.8 995.6 DAY 30 19 19 19 26 20 20 27 6 6 8 11 MEAN QFF PRESSURE IN HPA 1019.3 1016.7 1017.8 1017.0 1011.6 1012.2 1008.4 1008.0 1014.1 1017.5 1018.7 1020.1 1015.1 MAX. QFF PRESSURE IN HPA 1027.5 1026.6 1027.9 1031.0 1020.5 1024.7 1012.8 1018.0 1023.1 1026.3 1031.3 1027.3 1031.3 DAY 2 16 5 22 9 11 23 30 18 31 14 30 MIN. QFF PRESSURE IN HPA 1007.5 998.9 1001.6 998.9 1003.4 1004.7 1004.1 996.0 1007.5 1003.5 1012.1 1006.1 996.0 DAY 30 19 19 19 26 20 20 27 6 6 8 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1022.9 1020.2 1021.0 1020.7 1014.4 1014.8 1011.0 1010.8 1016.9 1020.6 1022.1 1023.7 1018.3 MAX. QFE PRESSURE IN HPA 1031.7 1029.8 1031.9 1034.0 1024.2 1026.9 1015.6 1020.1 1026.6 1031.1 1035.2 1030.8 1035.2 DAY 2 16 5 22 9 11 23 30 18 31 14 27 MIN. QFE PRESSURE IN HPA 1011.8 1005.5 1005.2 1001.5 1005.6 1007.3 1006.3 998.5 1009.6 1007.0 1015.2 1011.8 998.5 DAY 30 19 18 19 15 20 13 27 6 6 3 11 MEAN QNH PRESSURE IN HPA 1020.2 1017.5 1018.3 1018.0 1011.7 1012.1 1008.3 1008.1 1014.2 1017.9 1019.4 1021.0 1015.6 MAX. QNH PRESSURE IN HPA 1029.0 1027.1 1029.2 1031.3 1021.5 1024.2 1012.9 1017.4 1023.9 1028.4 1032.5 1028.1 1032.5 DAY 2 16 5 22 9 11 23 30 18 31 14 27 MIN. QNH PRESSURE IN HPA 1009.1 1002.8 1002.5 998.8 1002.9 1004.6 1003.6 995.8 1006.9 1004.3 1012.5 1009.1 995.8 DAY 30 19 18 19 15 20 13 27 6 6 3 11 MEAN QFF PRESSURE IN HPA 1020.5 1017.8 1018.6 1018.3 1012.1 1012.5 1008.7 1008.5 1014.6 1018.3 1019.7 1021.2 1015.9 MAX. QFF PRESSURE IN HPA 1029.2 1027.3 1029.4 1031.5 1021.8 1024.5 1013.3 1017.7 1024.2 1028.7 1032.7 1028.3 1032.7 DAY 2 16 5 22 9 11 23 30 18 31 14 27 MIN. QFF PRESSURE IN HPA 1009.3 1003.1 1002.8 999.2 1003.3 1005.0 1004.0 996.2 1007.3 1004.7 1012.8 1009.4 996.2 DAY 30 19 18 19 15 20 13 27 6 6 3 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1022.4 1020.0 1020.9 1020.7 1014.1 1014.5 1011.0 1010.3 1016.4 1020.1 1021.5 1023.0 1017.9 MAX. QFE PRESSURE IN HPA 1030.7 1028.8 1031.6 1033.5 1024.5 1026.4 1016.0 1019.3 1026.7 1031.4 1035.1 1029.8 1035.1 DAY 2 16 5 22 9 11 31 29 18 31 14 26 MIN. QFE PRESSURE IN HPA 1012.8 1006.6 1004.1 999.5 1004.0 1007.1 1005.6 998.6 1008.8 1006.5 1012.7 1013.1 998.6 DAY 22 18 18 19 15 20 13 27 6 14 3 11 MEAN QNH PRESSURE IN HPA 1019.6 1017.3 1018.2 1017.9 1011.4 1011.8 1008.3 1007.6 1013.7 1017.4 1018.8 1020.3 1015.2 MAX. QNH PRESSURE IN HPA 1028.0 1026.1 1028.9 1030.8 1021.8 1023.7 1013.3 1016.6 1024.0 1028.7 1032.4 1027.1 1032.4 DAY 2 16 5 22 9 11 31 29 18 31 14 26 MIN. QNH PRESSURE IN HPA 1010.1 1003.9 1001.4 996.8 1001.3 1004.4 1002.9 995.9 1006.1 1003.8 1010.0 1010.4 995.9 DAY 22 18 18 19 15 20 13 27 6 14 3 11 MEAN QFF PRESSURE IN HPA 1019.8 1017.5 1018.7 1018.1 1011.7 1012.1 1008.7 1007.8 1014.2 1017.8 1019.1 1020.7 1015.5 MAX. QFF PRESSURE IN HPA 1028.2 1026.3 1029.1 1031.0 1022.1 1024.0 1013.7 1017.0 1024.3 1029.0 1032.6 1027.3 1032.6 DAY 2 16 5 22 9 11 31 29 18 31 14 26 MIN. QFF PRESSURE IN HPA 1010.3 1004.2 1001.7 997.2 1001.7 1004.8 1003.3 996.4 1006.5 1004.2 1010.3 1010.7 996.4 DAY 30 18 18 19 15 20 13 27 6 14 3 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1021.4 1019.0 1019.9 1019.6 1013.0 1013.7 1010.3 1009.3 1015.4 1019.4 1020.3 1022.2 1017.0 MAX. QFE PRESSURE IN HPA 1030.1 1027.5 1030.5 1031.9 1023.1 1025.0 1015.4 1019.5 1025.6 1030.6 1033.9 1029.6 1033.9 DAY 2 16 5 22 8 11 31 29 18 31 14 29 MIN. QFE PRESSURE IN HPA 1011.0 1004.0 1002.0 998.7 1001.2 1006.7 1004.2 999.6 1007.6 1005.2 1010.1 1011.5 998.7 DAY 22 18 18 19 15 20 13 27 6 14 3 10 MEAN QNH PRESSURE IN HPA 1018.7 1016.3 1017.2 1016.8 1010.3 1011.0 1007.6 1006.7 1012.7 1016.6 1017.6 1019.5 1014.3 MAX. QNH PRESSURE IN HPA 1027.4 1024.8 1027.8 1029.2 1020.4 1022.3 1012.7 1016.8 1022.9 1027.9 1031.2 1026.9 1031.2 DAY 2 16 5 22 8 11 31 29 18 31 14 29 MIN. QNH PRESSURE IN HPA 1008.3 1001.3 999.3 996.0 998.5 1004.0 1001.5 996.9 1004.9 1002.5 1007.4 1008.8 996.0 DAY 22 18 18 19 15 20 13 27 6 14 3 10 MEAN QFF PRESSURE IN HPA 1019.0 1016.5 1017.5 1017.1 1010.7 1011.4 1008.0 1007.1 1013.1 1017.0 1017.9 1019.8 1014.6 MAX. QFF PRESSURE IN HPA 1027.6 1025.0 1028.0 1029.4 1020.7 1022.6 1013.1 1017.2 1023.2 1028.2 1031.5 1027.1 1031.5 DAY 2 16 5 22 8 11 31 29 18 31 14 29 MIN. QFF PRESSURE IN HPA 1008.6 1001.6 999.6 996.4 998.9 1004.4 1001.9 997.3 1005.3 1002.9 1007.7 1009.1 996.4 DAY 22 18 18 19 15 20 13 27 6 14 3 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1022.0 1019.3 1020.1 1019.2 1012.7 1013.0 1009.7 1009.1 1015.2 1019.6 1020.6 1022.7 1016.9 MAX. QFE PRESSURE IN HPA 1029.9 1027.0 1029.7 1032.1 1022.5 1025.1 1015.7 1020.9 1025.6 1028.0 1032.4 1030.5 1032.4 DAY 2 15 5 21 8 10 31 29 18 11 14 29 MIN. QFE PRESSURE IN HPA 1011.2 1004.0 1000.3 999.1 1004.0 1005.9 1003.9 1000.4 1007.4 1008.0 1009.4 1011.0 999.1 DAY 22 18 18 19 14 20 13 26 6 6 3 10 MEAN QNH PRESSURE IN HPA 1019.3 1016.5 1017.3 1016.5 1010.0 1010.3 1007.0 1006.4 1012.5 1016.9 1017.8 1019.9 1014.2 MAX. QNH PRESSURE IN HPA 1027.2 1024.3 1027.0 1029.4 1019.8 1022.4 1013.0 1018.2 1022.9 1025.3 1029.7 1027.8 1029.7 DAY 2 15 5 21 8 10 31 29 18 11 14 29 MIN. QNH PRESSURE IN HPA 1008.5 1001.3 997.6 996.4 1001.3 1003.2 1001.2 997.7 1004.7 1005.3 1006.7 1008.3 996.4 DAY 22 18 18 19 14 20 13 26 6 6 3 10 MEAN QFF PRESSURE IN HPA 1019.5 1016.8 1017.6 1016.8 1010.4 1010.7 1007.4 1006.8 1012.9 1017.2 1018.1 1020.2 1014.5 MAX. QFF PRESSURE IN HPA 1027.4 1024.5 1027.2 1029.6 1020.1 1022.7 1013.4 1018.6 1023.2 1025.6 1030.0 1028.0 1030.0 DAY 2 15 5 21 8 10 31 29 18 11 14 29 MIN. QFF PRESSURE IN HPA 1008.8 1001.6 998.0 996.8 1001.7 1003.6 1001.6 998.1 1005.1 1005.7 1007.0 1008.6 996.8 DAY 22 18 18 19 14 20 13 26 6 6 3 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1022.3 1019.5 1020.4 1019.6 1013.9 1013.7 1010.5 1009.9 1016.0 1020.2 1021.0 1022.9 1017.5 MAX. QFE PRESSURE IN HPA 1030.4 1029.3 1030.2 1033.4 1023.5 1026.3 1016.8 1022.7 1025.0 1028.0 1033.1 1030.5 1033.4 DAY 1 5 8 21 8 10 31 29 18 11 14 29 MIN. QFE PRESSURE IN HPA 1011.3 1002.4 1000.3 997.3 1004.8 1006.2 1005.8 999.7 1008.4 1007.8 1008.5 1009.5 997.3 DAY 22 18 18 19 14 7 9 26 23 5 3 10 MEAN QNH PRESSURE IN HPA 1019.6 1016.8 1017.7 1016.8 1011.2 1011.0 1007.8 1007.3 1013.3 1017.5 1018.2 1020.1 1014.8 MAX. QNH PRESSURE IN HPA 1027.7 1026.6 1027.5 1030.7 1020.8 1023.6 1014.1 1020.0 1022.3 1025.3 1030.4 1027.8 1030.7 DAY 1 5 8 21 8 10 31 29 18 11 14 29 MIN. QNH PRESSURE IN HPA 1008.6 999.7 997.6 994.6 1002.1 1003.5 1003.1 997.0 1005.7 1005.1 1005.8 1006.8 994.6 DAY 22 18 18 19 14 7 9 26 23 5 3 10 MEAN QFF PRESSURE IN HPA 1019.8 1017.0 1017.9 1017.1 1011.5 1011.4 1008.2 1007.7 1013.7 1017.8 1018.6 1020.4 1015.1 MAX. QFF PRESSURE IN HPA 1027.9 1026.8 1027.7 1030.9 1021.1 1023.9 1014.5 1020.3 1022.6 1025.6 1030.7 1028.0 1030.9 DAY 1 5 8 21 8 10 31 29 18 11 14 29 MIN. QFF PRESSURE IN HPA 1008.9 1000.0 998.0 995.0 1002.5 1003.9 1003.5 997.4 1006.1 1005.5 1006.1 1007.1 995.0 DAY 22 18 18 19 14 7 9 26 23 5 3 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1022.0 1019.4 1020.2 1019.4 1013.6 1013.8 1010.2 1009.8 1016.1 1019.7 1020.7 1022.6 1017.3 MAX. QFE PRESSURE IN HPA 1029.8 1029.8 1030.0 1033.4 1023.0 1026.8 1015.6 1022.3 1024.4 1026.2 1032.8 1030.2 1033.4 DAY 1 5 8 21 8 10 22 29 17 17 13 29 MIN. QFE PRESSURE IN HPA 1011.1 1001.9 1001.9 999.0 1004.6 1006.9 1005.7 998.4 1009.3 1006.5 1011.9 1007.2 998.4 DAY 22 18 18 19 14 7 9 26 23 5 3 10 MEAN QNH PRESSURE IN HPA 1019.2 1016.7 1017.5 1016.7 1010.9 1011.1 1007.6 1007.1 1013.4 1017.0 1018.0 1019.9 1014.6 MAX. QNH PRESSURE IN HPA 1027.1 1027.1 1027.3 1030.7 1020.3 1024.1 1012.9 1019.6 1021.7 1023.5 1030.1 1027.5 1030.7 DAY 1 5 8 21 8 10 22 29 17 17 13 29 MIN. QNH PRESSURE IN HPA 1008.4 999.2 999.2 996.3 1001.9 1004.2 1003.0 995.7 1006.6 1003.8 1009.2 1004.5 995.7 DAY 22 18 18 19 14 7 9 26 23 5 3 10 MEAN QFF PRESSURE IN HPA 1019.5 1016.9 1018.1 1017.0 1011.3 1011.4 1008.0 1007.5 1013.8 1017.3 1018.3 1020.2 1014.9 MAX. QFF PRESSURE IN HPA 1027.3 1027.3 1027.5 1030.9 1020.6 1024.4 1013.3 1019.9 1022.0 1023.8 1030.3 1027.7 1030.9 DAY 1 5 8 21 8 10 22 29 17 17 13 29 MIN. QFF PRESSURE IN HPA 1008.7 999.5 999.6 996.7 1002.3 1004.6 1003.4 996.2 1007.0 1004.2 1009.6 1004.8 996.2 DAY 22 18 18 19 14 7 9 26 23 5 3 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.9 6.8 9.6 12.3 18.9 21.8 25.4 25.0 23.6 18.0 14.6 9.9 16.1 MINIMUN AIR TEMPERATURE (C) 3.7 3.3 6.3 9.3 15.5 17.5 20.8 21.0 19.2 14.1 10.0 6.1 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 17 23 5 0 0 0 45 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 4 6 0 0 0 0 0 0 0 0 0 3 13 TEMPERATURE RECORDS LOWEST(C) 0.0 -1.0 2.0 5.0 12.0 13.0 18.0 17.0 16.0 11.0 6.0 -1.0 -1.0 DAY 15 15 17 2 4 4 1 12 20 10 20 21 MAXIMUM AIR TEMPERATURE (C) 10.4 11.1 12.6 16.0 22.2 26.1 29.8 29.2 28.3 22.4 19.3 14.6 20.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 16 18 2 0 0 0 39 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.0 22.0 19.0 29.0 26.0 31.0 34.0 32.0 32.0 29.0 24.0 22.0 34.0 DAY 2 10 28 17 24 13 22 17 10 7 23 13 DIF. BETWEEN (MAX.-MIN.) (C) 6.7 7.8 6.3 6.7 6.7 8.6 9.0 8.2 9.1 8.3 9.3 8.5 8.0 MEAN DAILY TEMP. (MDT) (C) 7.0 7.2 9.5 12.6 18.9 21.8 25.3 25.1 23.7 18.3 14.6 10.3 16.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.0 34.0 134.5 126.0 81.5 1.5 0.0 0.0 379.5 HEATING DEG. DAYS(BASE 18 0C) 339.5 303.5 264.5 166.5 10.5 0.0 0.0 0.0 0.0 14.0 100.5 238.0 1437.0 DEWPOINT (MEAN C) 4.3 4.2 7.8 9.7 16.1 16.9 20.2 20.2 19.1 14.6 11.5 6.5 12.6 MIXING RATIO (G/KG) 5.19 5.19 6.60 7.57 11.49 12.20 15.17 14.98 14.01 10.37 8.46 6.17 9.78 VAPOUR PRESSURE (HPA) 8.49 8.40 10.69 12.23 18.39 19.43 24.01 23.77 22.39 16.73 13.68 10.00 15.69 SATURATION DEF. (HPA) 1.69 1.70 1.39 2.38 3.69 7.13 8.96 8.32 7.27 4.28 3.19 2.68 4.39 RELATIVE HUMIDITY (MEAN %) 85 85 89 86 84 75 75 76 77 81 83 81 81 RELATIVE HUMIDITY (MAX. %) 95 95 98 96 95 90 90 92 90 93 94 93 93 RELATIVE HUMIDITY (MIN. %) 70 69 76 74 71 59 58 58 64 67 68 65 67 RELATIVE HUMIDITY (MEAN% 03UTC) 91 90 94 93 92 80 79 84 86 87 86 85 87 RELATIVE HUMIDITY (MEAN% 09UTC) 73 74 82 80 76 65 65 63 65 71 71 69 71 RELATIVE HUMIDITY (MEAN% 15UTC) 87 88 89 83 78 68 69 73 73 85 87 86 81 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 171.1 115.5 77.1 114.2 8.0 21.1 1.0 44.7 14.0 128.8 5.4 54.5 755.4 DAYS WITH PRECIPITATION >=10 3 3 3 4 0 1 0 1 1 3 0 3 22 DAYS WITH PRECIPITATION >= 5 3 5 7 8 0 1 0 1 1 3 0 5 34 DAYS WITH PRECIPITATION >= 1 7 10 10 16 3 2 1 4 3 6 3 8 73 DAYS WITH PRECIPITATION 12 12 14 20 16 3 1 8 3 13 4 14 120 GREATEST DAILY PRECIPITATION 68.0 50.0 18.0 29.0 2.4 18.0 1.0 40.0 12.0 70.0 2.4 12.0 70.0 DAY 14 12 15 19 21 19 31 20 30 3 11 6 DAY WITH THUNDER STORM 0 0 0 0 4 0 1 0 0 1 0 1 7 DAYS WITH SNOW OR SLEET 2 1 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 0 0 1 5 4 5 3 2 1 0 21 WIND DIRECTION (PREVAILING) 315 315 90 90 360 315 360 360 360 315 225 315 315 PREVAILING WIND SPEED(KNOTS) 6.5 8.2 5.9 5.7 5.7 9.4 5.9 6.4 5.8 7.7 2.6 9.7 8.3 PREVAILING WIND PERCENT 14.1 17.0 20.2 18.0 13.0 15.4 24.6 13.8 16.0 12.1 10.9 18.2 12.5 CALMS PERCENT OF WIND 50.0 38.8 37.2 41.8 44.5 39.2 46.4 48.2 41.2 44.9 57.3 54.7 45.4 NO. OF WIND OBSERVATION 248 224 247 239 247 240 248 247 238 247 239 247 2911 VECTOR WIND DIRECTION (MEAN) 306 336 29 22 1 339 347 339 7 330 319 305 345 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.8 1.2 1.4 1.8 2.2 2.1 1.9 1.5 0.7 0.3 1.8 1.3 WIND STEADINESES (MEAN %) 45.5 26.7 35.3 41.2 62.1 59.5 70.0 67.9 55.6 26.9 17.6 58.1 44.8 WIND SPEED (MEAN KNOTS) 2.2 3.0 3.4 3.4 2.9 3.7 3.0 2.8 2.7 2.6 1.7 3.1 2.9 FASTEST WIND DIRECTION 310 300 310 320 320 300 300 320 340 300 310 300 300 FASTEST WIND SPEED (KNOTS) 16 40 20 22 18 20 18 18 14 20 15 22 40 DAY 30 10 15 1 17 12 5 9 10 25 24 7 DAYS WITH SKY CLEAR (0-2)/8 8 4 4 4 5 13 20 9 23 12 7 3 112 DAYS WITH P.CLOUDY (3-6)/8 8 12 7 7 16 13 10 13 4 11 14 14 129 DAYS WITH CLOUDY (7-8)/8 15 12 20 19 10 4 1 9 3 8 9 14 124 DAYS WITH VISIBILITY =< 2 KM 5 1 8 5 1 0 0 0 1 2 1 0 24 DURATION OF SUNSHINE HOURS 106.4 108.2 86.9 113.0 181.5 228.9 255.1 163.2 240.5 166.5 127.9 94.5 1872.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1027.8 1017.4 1019.4 1017.5 1015.0 1010.9 1009.6 1011.1 1017.3 1020.9 1020.0 1019.3 1017.2 MAX. QFE PRESSURE IN HPA 1043.1 1032.0 1033.6 1030.3 1023.8 1021.0 1015.8 1017.6 1026.9 1031.9 1031.4 1034.4 1043.1 DAY-HOUR 8-18 1- 6 5-18 9- 6 2- 6 16-18 12- 3 24- 6 23- 9 31- 6 20- 6 31-18 MIN. QFE PRESSURE IN HPA 1013.1 996.2 1005.4 997.4 1007.2 1001.4 1000.4 1005.3 1007.8 1006.0 1007.1 1004.6 996.2 DAY-HOUR 13-12 27-12 11-21 14- 3 26- 0 21- 3 4-15 18-15 7-15 8-12 18-12 7-15 MEAN QNH PRESSURE IN HPA 1025.1 1014.7 1016.7 1014.8 1012.3 1008.2 1006.9 1008.4 1014.5 1018.2 1017.3 1016.6 1014.5 MAX. QNH PRESSURE IN HPA 1040.3 1029.3 1030.9 1027.6 1021.1 1018.3 1013.1 1014.9 1024.2 1029.2 1028.7 1031.7 1040.3 DAY-HOUR 8-18 1- 6 5-18 9- 6 2- 6 16-18 12- 3 24- 6 23- 9 31- 6 20- 6 31-18 MIN. QNH PRESSURE IN HPA 1010.4 993.5 1002.7 994.7 1004.5 998.7 997.7 1002.6 1005.1 1003.3 1004.4 1001.9 993.5 DAY-HOUR 13-12 27-12 11-21 14- 3 26- 0 21- 3 4-15 18-15 7-15 8-12 18-12 7-15 MEAN QFF PRESSURE IN HPA 1025.3 1015.0 1017.0 1015.1 1012.6 1008.6 1007.3 1008.8 1014.9 1018.5 1017.6 1016.8 1014.8 MAX. QFF PRESSURE IN HPA 1040.6 1029.5 1031.1 1027.8 1021.4 1018.6 1013.5 1015.3 1024.6 1029.5 1029.0 1031.9 1040.6 DAY-HOUR 8-18 1- 6 5-18 9- 6 2- 6 16-18 12- 3 24- 6 23- 9 31- 6 20- 6 31-18 MIN. QFF PRESSURE IN HPA 1010.7 993.8 1003.0 995.0 1004.9 999.1 998.1 1003.0 1005.5 1003.7 1004.7 1002.2 993.8 DAY-HOUR 13-12 27-12 11-21 14- 3 26- 0 21- 3 4-15 18-15 7-15 8-12 18-12 7-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1027.7 1017.5 1019.1 1016.7 1014.5 1010.8 1009.3 1010.9 1016.7 1020.5 1019.8 1018.9 1016.9 MAX. QFE PRESSURE IN HPA 1041.2 1030.8 1032.0 1028.2 1022.6 1021.0 1015.4 1016.7 1025.1 1031.3 1029.6 1030.4 1041.2 DAY 9 1 6 9 2 17 12 21 23 31 20 28 MIN. QFE PRESSURE IN HPA 1013.9 1005.2 1008.2 998.0 1007.2 1001.5 1000.6 1005.6 1008.7 1008.1 1010.1 1005.1 998.0 DAY 14 8 28 14 26 21 5 19 8 7 18 13 MEAN QNH PRESSURE IN HPA 1025.0 1014.8 1016.4 1014.0 1011.8 1008.1 1006.6 1008.2 1014.0 1017.8 1017.1 1016.2 1014.2 MAX. QNH PRESSURE IN HPA 1038.4 1028.1 1029.3 1025.5 1019.9 1018.3 1012.7 1014.0 1022.4 1028.6 1026.9 1027.7 1038.4 DAY 9 1 6 9 2 17 12 21 23 31 20 28 MIN. QNH PRESSURE IN HPA 1011.2 1002.5 1005.5 995.3 1004.5 998.8 997.9 1002.9 1006.0 1005.4 1007.4 1002.4 995.3 DAY 14 8 28 14 26 21 5 19 8 7 18 13 MEAN QFF PRESSURE IN HPA 1025.2 1015.0 1016.6 1014.3 1012.1 1008.4 1007.0 1008.6 1014.4 1018.1 1017.4 1016.4 1014.5 MAX. QFF PRESSURE IN HPA 1038.7 1028.3 1029.5 1025.7 1020.2 1018.6 1013.1 1014.4 1022.8 1028.9 1027.1 1027.9 1038.7 DAY 9 1 6 9 2 17 12 21 23 31 20 28 MIN. QFF PRESSURE IN HPA 1011.5 1002.8 1005.8 995.6 1004.9 999.2 998.3 1003.3 1006.4 1005.8 1007.7 1002.7 995.6 DAY 14 8 28 14 26 21 5 19 8 24 18 13 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1027.6 1017.7 1019.6 1017.2 1015.3 1011.4 1010.1 1011.6 1017.5 1021.0 1020.3 1019.1 1017.4 MAX. QFE PRESSURE IN HPA 1039.6 1031.2 1032.1 1028.8 1023.0 1021.0 1015.8 1017.2 1025.7 1031.3 1029.9 1030.8 1039.6 DAY 9 1 6 9 2 17 12 21 23 31 20 28 MIN. QFE PRESSURE IN HPA 1014.9 1004.1 1008.9 997.4 1007.8 1001.4 1003.0 1006.6 1010.0 1008.5 1009.0 1006.7 997.4 DAY 13 10 28 14 26 21 21 18 7 24 18 13 MEAN QNH PRESSURE IN HPA 1024.8 1015.0 1016.9 1014.5 1012.6 1008.7 1007.4 1008.9 1014.8 1018.3 1017.6 1016.4 1014.7 MAX. QNH PRESSURE IN HPA 1036.8 1028.5 1029.4 1026.1 1020.3 1018.3 1013.1 1014.5 1023.0 1028.6 1027.2 1028.1 1036.8 DAY 9 1 6 9 2 17 12 21 23 31 20 28 MIN. QNH PRESSURE IN HPA 1012.2 1001.4 1006.2 994.7 1005.1 998.7 1000.3 1003.9 1007.3 1005.8 1006.3 1004.0 994.7 DAY 13 10 28 14 26 21 21 18 7 24 18 13 MEAN QFF PRESSURE IN HPA 1025.0 1015.2 1017.1 1014.8 1013.0 1009.1 1007.8 1009.3 1015.2 1018.7 1017.8 1016.6 1015.0 MAX. QFF PRESSURE IN HPA 1037.1 1028.7 1029.6 1026.3 1020.6 1018.6 1013.5 1014.9 1023.3 1028.9 1027.4 1028.3 1037.1 DAY 9 1 6 9 2 17 12 21 23 31 20 28 MIN. QFF PRESSURE IN HPA 1012.5 1001.7 1006.5 995.0 1005.5 999.1 1000.7 1004.3 1007.7 1006.2 1006.6 1004.3 995.0 DAY 13 10 28 14 26 21 21 18 7 24 18 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1028.4 1018.4 1020.4 1018.0 1015.9 1011.6 1010.4 1012.0 1018.2 1022.0 1021.2 1020.1 1018.1 MAX. QFE PRESSURE IN HPA 1039.5 1032.0 1032.7 1030.3 1023.8 1020.2 1015.5 1017.6 1026.7 1031.9 1031.4 1032.5 1039.5 DAY 8 1 6 9 2 17 11 24 23 31 20 31 MIN. QFE PRESSURE IN HPA 1015.4 1003.6 1009.3 997.4 1008.7 1002.6 1003.4 1007.8 1010.5 1009.2 1008.6 1008.9 997.4 DAY 13 10 28 14 26 21 21 18 7 7 18 13 MEAN QNH PRESSURE IN HPA 1025.7 1015.7 1017.7 1015.3 1013.2 1008.9 1007.7 1009.3 1015.5 1019.3 1018.4 1017.4 1015.3 MAX. QNH PRESSURE IN HPA 1036.7 1029.3 1030.0 1027.6 1021.1 1017.5 1012.8 1014.9 1024.0 1029.2 1028.7 1029.8 1036.7 DAY 8 1 6 9 2 17 11 24 23 31 20 31 MIN. QNH PRESSURE IN HPA 1012.7 1000.9 1006.6 994.7 1006.0 999.9 1000.7 1005.1 1007.8 1006.5 1005.9 1006.2 994.7 DAY 13 10 28 14 26 21 21 18 7 7 18 13 MEAN QFF PRESSURE IN HPA 1025.9 1015.9 1018.0 1015.6 1013.6 1009.2 1008.1 1009.7 1015.9 1019.6 1018.7 1017.6 1015.7 MAX. QFF PRESSURE IN HPA 1037.0 1029.5 1030.2 1027.8 1021.4 1017.9 1013.2 1015.3 1024.4 1029.5 1029.0 1030.0 1037.0 DAY 8 1 6 9 2 17 11 24 23 31 20 31 MIN. QFF PRESSURE IN HPA 1013.0 1001.2 1006.9 995.0 1006.4 1000.3 1001.1 1005.5 1008.2 1006.9 1006.2 1006.5 995.0 DAY 13 10 28 14 26 21 21 18 8 7 18 13 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1027.8 1017.8 1020.1 1017.9 1015.7 1011.3 1010.3 1011.6 1017.8 1021.4 1020.4 1019.5 1017.6 MAX. QFE PRESSURE IN HPA 1040.8 1031.9 1032.6 1030.2 1023.2 1019.8 1015.3 1017.0 1026.9 1031.3 1030.1 1032.7 1040.8 DAY 8 1 6 9 2 16 11 24 23 31 20 31 MIN. QFE PRESSURE IN HPA 1013.6 998.7 1008.8 998.8 1008.9 1002.4 1003.8 1007.6 1009.8 1009.2 1007.7 1007.8 998.7 DAY 13 27 28 14 26 21 21 17 8 7 18 14 MEAN QNH PRESSURE IN HPA 1025.1 1015.1 1017.3 1015.2 1013.0 1008.6 1007.6 1008.9 1015.1 1018.7 1017.6 1016.7 1014.9 MAX. QNH PRESSURE IN HPA 1038.0 1029.2 1029.9 1027.5 1020.5 1017.1 1012.6 1014.3 1024.2 1028.6 1027.4 1030.0 1038.0 DAY 8 1 6 9 2 16 11 24 23 31 20 31 MIN. QNH PRESSURE IN HPA 1010.9 996.0 1006.1 996.1 1006.2 999.7 1001.1 1004.9 1007.1 1006.5 1005.0 1005.1 996.0 DAY 13 27 28 14 26 21 21 17 8 7 18 14 MEAN QFF PRESSURE IN HPA 1025.3 1015.4 1017.6 1015.8 1013.1 1009.0 1008.0 1009.3 1015.7 1019.0 1017.7 1016.9 1015.2 MAX. QFF PRESSURE IN HPA 1038.3 1029.4 1030.1 1027.7 1020.8 1017.5 1013.0 1014.7 1024.6 1028.9 1027.7 1030.2 1038.3 DAY 8 1 6 9 2 16 11 24 23 31 20 31 MIN. QFF PRESSURE IN HPA 1011.2 996.3 1006.4 996.4 1006.6 1000.1 1001.5 1005.3 1007.5 1006.9 1005.3 1005.4 996.3 DAY 13 27 28 14 26 21 21 18 8 7 18 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1027.1 1016.8 1019.0 1017.1 1014.6 1010.4 1009.3 1010.6 1017.0 1020.4 1019.4 1018.6 1016.7 MAX. QFE PRESSURE IN HPA 1041.7 1031.0 1031.3 1029.5 1022.9 1019.6 1013.8 1016.4 1025.8 1031.1 1028.7 1033.2 1041.7 DAY 8 1 6 9 2 16 11 24 23 31 20 31 MIN. QFE PRESSURE IN HPA 1013.1 996.2 1008.3 998.0 1007.3 1001.5 1002.5 1006.2 1008.6 1006.0 1007.1 1005.3 996.2 DAY 13 27 11 14 11 21 4 16 8 8 18 7 MEAN QNH PRESSURE IN HPA 1024.4 1014.0 1016.2 1014.4 1011.9 1007.7 1006.6 1007.9 1014.3 1017.7 1016.7 1015.9 1014.0 MAX. QNH PRESSURE IN HPA 1038.9 1028.3 1028.6 1026.8 1020.2 1016.9 1011.1 1013.7 1023.1 1028.4 1026.0 1030.5 1038.9 DAY 8 1 6 9 2 16 11 24 23 31 20 31 MIN. QNH PRESSURE IN HPA 1010.4 993.5 1005.6 995.3 1004.6 998.8 999.8 1003.5 1005.9 1003.3 1004.4 1002.6 993.5 DAY 13 27 11 14 11 21 4 16 8 8 18 7 MEAN QFF PRESSURE IN HPA 1024.6 1014.3 1016.5 1014.7 1012.2 1008.1 1007.0 1008.3 1014.7 1018.0 1017.0 1016.2 1014.3 MAX. QFF PRESSURE IN HPA 1039.2 1028.5 1028.8 1027.0 1020.5 1017.3 1011.5 1014.1 1023.4 1028.7 1026.3 1030.7 1039.2 DAY 8 1 6 9 2 16 11 24 23 31 20 31 MIN. QFF PRESSURE IN HPA 1010.7 993.8 1005.9 995.7 1005.0 999.2 1000.2 1003.9 1006.3 1003.7 1004.7 1002.9 993.8 DAY 13 27 11 14 11 21 4 17 8 8 18 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1027.7 1016.9 1018.8 1017.3 1014.2 1010.0 1008.8 1010.2 1016.7 1020.5 1019.6 1019.1 1016.6 MAX. QFE PRESSURE IN HPA 1042.5 1031.2 1032.5 1029.4 1022.3 1019.9 1014.0 1016.4 1025.3 1030.8 1028.5 1033.5 1042.5 DAY 8 1 5 9 1 16 31 20 23 31 20 31 MIN. QFE PRESSURE IN HPA 1013.7 998.3 1006.0 998.7 1007.4 1001.6 1000.4 1005.3 1007.8 1009.1 1008.2 1004.6 998.3 DAY 13 27 11 14 25 21 4 18 7 6 18 7 MEAN QNH PRESSURE IN HPA 1025.0 1014.1 1016.1 1014.6 1011.5 1007.3 1006.1 1007.5 1014.0 1017.8 1016.9 1016.4 1013.9 MAX. QNH PRESSURE IN HPA 1039.7 1028.5 1029.8 1026.7 1019.6 1017.2 1011.3 1013.7 1022.6 1028.1 1025.8 1030.8 1039.7 DAY 8 1 5 9 1 16 31 20 23 31 20 31 MIN. QNH PRESSURE IN HPA 1011.0 995.6 1003.3 996.0 1004.7 998.9 997.7 1002.6 1005.1 1006.4 1005.5 1001.9 995.6 DAY 13 27 11 14 25 21 4 18 7 6 18 7 MEAN QFF PRESSURE IN HPA 1025.2 1014.4 1016.3 1014.9 1011.9 1007.7 1006.5 1007.9 1014.4 1018.1 1017.1 1016.7 1014.2 MAX. QFF PRESSURE IN HPA 1040.0 1028.7 1030.0 1026.9 1019.9 1017.6 1011.7 1014.1 1022.9 1028.4 1026.0 1031.0 1040.0 DAY 8 1 5 9 1 16 31 20 23 31 20 31 MIN. QFF PRESSURE IN HPA 1011.3 995.9 1003.6 996.4 1005.1 999.3 998.1 1003.0 1005.5 1006.8 1005.8 1002.2 995.9 DAY 13 27 11 14 25 21 4 18 7 6 18 7 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1028.3 1017.4 1019.3 1018.0 1014.9 1010.8 1009.3 1011.0 1017.2 1021.0 1019.9 1019.8 1017.3 MAX. QFE PRESSURE IN HPA 1043.1 1031.2 1033.6 1029.8 1023.6 1021.0 1015.1 1017.2 1025.2 1031.2 1030.1 1034.4 1043.1 DAY 8 1 5 9 1 16 11 7 23 10 19 31 MIN. QFE PRESSURE IN HPA 1014.2 1000.6 1005.9 999.8 1007.8 1003.3 1000.8 1005.4 1008.5 1008.9 1009.9 1004.7 999.8 DAY 13 27 11 14 25 20 4 18 7 6 18 7 MEAN QNH PRESSURE IN HPA 1025.6 1014.7 1016.6 1015.3 1012.2 1008.1 1006.6 1008.3 1014.5 1018.3 1017.2 1017.1 1014.5 MAX. QNH PRESSURE IN HPA 1040.3 1028.5 1030.9 1027.1 1020.9 1018.3 1012.4 1014.5 1022.5 1028.5 1027.4 1031.7 1040.3 DAY 8 1 5 9 1 16 11 7 23 10 19 31 MIN. QNH PRESSURE IN HPA 1011.5 997.9 1003.2 997.1 1005.1 1000.6 998.1 1002.7 1005.8 1006.2 1007.2 1002.0 997.1 DAY 13 27 11 14 25 20 4 18 7 6 18 7 MEAN QFF PRESSURE IN HPA 1025.8 1014.9 1016.8 1015.6 1012.6 1008.5 1007.0 1008.7 1014.9 1018.7 1017.5 1017.4 1014.9 MAX. QFF PRESSURE IN HPA 1040.6 1028.7 1031.1 1027.3 1021.2 1018.6 1012.8 1014.9 1022.9 1028.8 1027.7 1031.9 1040.6 DAY 8 1 5 9 1 16 11 7 23 10 19 31 MIN. QFF PRESSURE IN HPA 1011.8 998.2 1003.5 997.5 1005.5 1001.0 998.5 1003.1 1006.2 1006.6 1007.5 1002.3 997.5 DAY 13 27 11 14 25 20 4 18 7 6 18 7 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1028.1 1017.2 1019.4 1017.6 1014.7 1010.9 1009.4 1010.9 1017.0 1020.6 1019.7 1019.2 1017.1 MAX. QFE PRESSURE IN HPA 1041.8 1030.1 1033.1 1029.1 1023.7 1021.0 1015.4 1016.8 1024.9 1031.2 1029.7 1028.9 1041.8 DAY 8 1 5 9 1 16 11 7 22 30 19 27 MIN. QFE PRESSURE IN HPA 1014.0 1004.4 1005.4 999.3 1007.8 1002.7 1001.2 1005.4 1008.2 1008.6 1010.1 1006.1 999.3 DAY 13 27 11 13 10 20 4 18 7 23 17 12 MEAN QNH PRESSURE IN HPA 1025.3 1014.5 1016.7 1014.9 1012.0 1008.2 1006.7 1008.2 1014.3 1017.9 1017.0 1016.5 1014.4 MAX. QNH PRESSURE IN HPA 1039.0 1027.4 1030.4 1026.4 1021.0 1018.3 1012.7 1014.1 1022.2 1028.5 1027.0 1026.2 1039.0 DAY 8 1 5 9 1 16 11 7 22 30 19 27 MIN. QNH PRESSURE IN HPA 1011.3 1001.7 1002.7 996.6 1005.1 1000.0 998.5 1002.7 1005.5 1005.9 1007.4 1003.4 996.6 DAY 13 27 11 13 10 20 4 18 7 23 17 12 MEAN QFF PRESSURE IN HPA 1025.6 1014.7 1017.0 1015.2 1012.4 1008.6 1007.1 1008.6 1014.7 1018.2 1017.3 1016.7 1014.7 MAX. QFF PRESSURE IN HPA 1039.3 1027.6 1030.6 1026.6 1021.3 1018.6 1013.1 1014.5 1022.6 1028.8 1027.2 1026.4 1039.3 DAY 8 1 5 9 1 16 11 7 22 30 19 27 MIN. QFF PRESSURE IN HPA 1011.6 1002.0 1003.0 996.9 1005.5 1000.4 998.9 1003.1 1005.9 1006.3 1007.7 1003.7 996.9 DAY 13 27 11 13 10 20 4 18 7 23 17 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 2.1 6.0 13.9 17.7 23.6 26.5 24.8 23.3 20.3 13.2 6.6 15.1 MINIMUN AIR TEMPERATURE (C) -0.3 -1.3 3.0 10.0 14.0 19.9 22.8 20.5 20.1 17.1 9.2 4.0 11.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 8 30 16 13 3 0 0 70 DAYS WITH MINIMUM TEMP. <=-4 6 7 0 0 0 0 0 0 0 0 0 0 13 DAYS WITH FREEZING MIN.<= 0 18 22 3 0 0 0 0 0 0 0 0 9 52 TEMPERATURE RECORDS LOWEST(C) -9.0 -6.0 -1.0 5.0 10.0 17.0 20.0 17.0 16.0 12.0 5.0 -2.0 -9.0 DAY 21 3 11 3 12 1 14 27 19 31 9 24 MAXIMUM AIR TEMPERATURE (C) 6.6 5.6 9.5 18.2 21.4 27.2 30.1 29.2 26.9 24.0 18.1 10.0 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 5 23 12 2 0 0 0 43 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.0 11.0 18.0 28.0 30.0 33.0 32.0 33.0 31.0 28.0 26.0 14.0 33.0 DAY 13 28 25 28 30 22 12 16 2 4 27 3 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 6.9 6.5 8.2 7.4 7.3 7.3 8.7 6.8 6.9 8.9 6.0 7.3 MEAN DAILY TEMP. (MDT) (C) 3.2 2.2 6.2 14.1 17.7 23.5 26.5 24.9 23.5 20.5 13.6 7.0 15.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.0 77.0 169.5 120.0 76.0 18.0 0.0 0.0 465.5 HEATING DEG. DAYS(BASE 18 0C) 460.0 459.5 364.5 122.5 33.5 0.0 0.0 0.0 0.0 2.0 130.5 341.0 1913.5 DEWPOINT (MEAN C) 1.0 -0.7 4.1 11.1 14.7 19.9 22.3 20.7 20.7 18.2 10.9 4.1 12.3 MIXING RATIO (G/KG) 4.09 3.65 5.06 8.40 10.58 14.68 17.14 15.55 15.40 13.20 8.20 5.14 10.09 VAPOUR PRESSURE (HPA) 6.71 6.00 8.25 13.51 16.96 23.31 27.06 24.69 24.53 21.17 13.28 8.42 16.16 SATURATION DEF. (HPA) 1.08 1.26 1.24 2.93 3.56 6.18 7.90 7.12 4.32 3.00 2.28 1.61 3.54 RELATIVE HUMIDITY (MEAN %) 87 83 89 85 84 81 78 79 86 89 87 85 84 RELATIVE HUMIDITY (MAX. %) 97 93 98 96 93 92 89 92 96 97 98 96 95 RELATIVE HUMIDITY (MIN. %) 73 70 77 70 72 69 67 65 74 75 71 69 71 RELATIVE HUMIDITY (MEAN% 03UTC) 92 88 95 93 89 85 84 88 92 95 95 91 91 RELATIVE HUMIDITY (MEAN% 09UTC) 78 73 82 77 79 74 71 70 77 80 76 73 76 RELATIVE HUMIDITY (MEAN% 15UTC) 89 85 85 80 82 76 72 73 85 90 91 87 83 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 141.9 87.9 126.0 17.5 67.4 40.2 28.8 88.4 114.3 359.5 140.0 245.4 1457.3 DAYS WITH PRECIPITATION >=10 6 3 3 0 2 1 2 2 1 5 5 5 35 DAYS WITH PRECIPITATION >= 5 9 6 6 2 3 3 2 2 4 6 9 10 62 DAYS WITH PRECIPITATION >= 1 15 9 16 4 13 9 2 2 8 9 12 13 112 DAYS WITH PRECIPITATION 21 11 22 8 17 12 5 7 11 11 12 17 154 GREATEST DAILY PRECIPITATION 32.0 43.0 35.0 8.0 21.0 15.0 17.0 77.0 93.0 180.0 46.0 72.0 180.0 DAY 19 8 19 4 7 8 31 1 7 8 19 23 DAY WITH THUNDER STORM 0 0 0 0 4 6 1 3 0 2 0 1 17 DAYS WITH SNOW OR SLEET 8 4 3 0 0 0 0 0 0 0 0 5 20 DAYS WITH DUST 0 0 0 5 0 0 0 0 1 1 0 0 7 WIND DIRECTION (PREVAILING) 315 315 315 45 90 45 45 45 45 90 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.3 8.0 7.2 4.1 6.5 4.7 4.6 4.5 3.7 4.2 10.0 6.3 7.8 PREVAILING WIND PERCENT 26.6 17.7 17.8 17.2 14.5 18.4 13.8 16.2 7.9 13.4 8.8 19.4 11.8 CALMS PERCENT OF WIND 54.0 55.8 57.9 51.9 53.2 52.7 49.4 54.3 58.8 69.2 65.7 60.7 57.0 NO. OF WIND OBSERVATION 248 231 247 239 248 239 247 247 240 247 239 247 2919 VECTOR WIND DIRECTION (MEAN) 307 320 360 31 28 31 345 24 357 25 309 304 349 VECTOR WIND MAGNITUDE(KNOTS) 2.4 1.6 1.2 1.6 1.5 1.4 1.8 1.1 0.6 0.6 0.9 1.5 1.1 WIND STEADINESES (MEAN %) 77.4 57.1 44.4 61.5 51.7 53.8 58.1 52.4 33.3 40.0 50.0 78.9 45.8 WIND SPEED (MEAN KNOTS) 3.1 2.8 2.7 2.6 2.9 2.6 3.1 2.1 1.8 1.5 1.8 1.9 2.4 FASTEST WIND DIRECTION 310 320 320 330 310 330 320 350 330 320 300 300 330 FASTEST WIND SPEED (KNOTS) 18 18 22 33 16 12 17 14 15 27 18 15 33 DAY 18 20 12 3 10 5 7 18 10 21 8 14 DAYS WITH SKY CLEAR (0-2)/8 5 10 4 6 7 13 12 16 7 5 13 3 101 DAYS WITH P.CLOUDY (3-6)/8 5 6 7 16 8 12 15 12 12 14 9 10 126 DAYS WITH CLOUDY (7-8)/8 21 13 20 8 16 5 4 3 11 12 8 18 139 DAYS WITH VISIBILITY =< 2 KM 6 6 4 9 0 2 0 0 0 3 3 5 38 DURATION OF SUNSHINE HOURS 80.6 139.3 84.7 191.4 146.1 202.5 190.7 261.6 136.0 108.9 150.8 76.7 1769.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1027.3 1029.2 1023.1 1015.4 1014.9 1011.6 1009.8 1013.5 1016.1 1019.3 1021.2 1028.8 1019.2 MAX. QFE PRESSURE IN HPA 1041.0 1044.3 1036.7 1029.2 1027.2 1020.8 1015.0 1021.0 1027.2 1028.8 1030.5 1040.6 1044.3 DAY-HOUR 4-18 22- 6 20- 6 1- 6 23- 6 17- 9 25- 9 24- 9 17-18 25-18 11- 6 23- 6 MIN. QFE PRESSURE IN HPA 1010.4 1013.9 1007.8 1005.3 999.8 999.6 1002.8 1005.4 1007.5 1011.9 1006.5 1012.0 999.6 DAY-HOUR 13-12 14-21 25-21 3-15 6- 3 21-21 6- 0 16- 0 1-18 21-15 3-12 16- 9 MEAN QNH PRESSURE IN HPA 1024.5 1026.4 1020.4 1012.7 1012.2 1008.9 1007.1 1010.8 1013.4 1016.6 1018.4 1026.1 1016.5 MAX. QNH PRESSURE IN HPA 1038.2 1041.5 1034.0 1026.5 1024.5 1018.1 1012.3 1018.3 1024.5 1026.1 1027.8 1037.8 1041.5 DAY-HOUR 4-18 22- 6 20- 6 1- 6 23- 6 17- 9 25- 9 24- 9 17-18 25-18 11- 6 23- 6 MIN. QNH PRESSURE IN HPA 1007.7 1011.2 1005.1 1002.6 997.1 996.9 1000.1 1002.7 1004.8 1009.2 1003.8 1009.3 996.9 DAY-HOUR 13-12 14-21 25-21 3-15 6- 3 21-21 6- 0 16- 0 1-18 21-15 3-12 16- 9 MEAN QFF PRESSURE IN HPA 1024.7 1026.6 1020.6 1013.0 1012.6 1009.3 1007.5 1011.2 1013.8 1016.9 1018.7 1026.3 1016.8 MAX. QFF PRESSURE IN HPA 1038.4 1041.7 1034.1 1026.7 1024.8 1018.5 1012.7 1018.7 1024.8 1026.4 1028.1 1038.0 1041.7 DAY-HOUR 4-18 22- 6 20- 6 1- 6 23- 6 17- 9 25-21 24- 9 17-18 25-18 11- 6 23- 6 MIN. QFF PRESSURE IN HPA 1007.9 1011.4 1005.4 1002.9 997.5 997.3 1000.5 1003.1 1005.2 1009.6 1004.1 1009.6 997.3 DAY-HOUR 13-12 14-21 25-21 3-15 6- 3 21-21 6- 0 16- 0 1-18 21-15 3-12 16- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1027.1 1028.9 1022.6 1015.1 1014.1 1011.2 1009.4 1012.9 1015.7 1019.2 1020.9 1028.4 1018.8 MAX. QFE PRESSURE IN HPA 1038.1 1043.3 1035.4 1027.2 1025.7 1018.9 1014.4 1019.6 1025.6 1026.6 1029.8 1037.7 1043.3 DAY 5 22 20 15 23 17 26 25 17 26 9 25 MIN. QFE PRESSURE IN HPA 1014.6 1014.0 1008.0 1006.7 1000.0 1000.5 1002.8 1005.4 1008.6 1013.5 1007.0 1014.9 1000.0 DAY 13 17 26 27 6 22 6 16 2 20 4 16 MEAN QNH PRESSURE IN HPA 1024.4 1026.1 1019.9 1012.4 1011.4 1008.5 1006.7 1010.2 1012.9 1016.5 1018.2 1025.7 1016.1 MAX. QNH PRESSURE IN HPA 1035.4 1040.5 1032.7 1024.5 1023.0 1016.2 1011.7 1016.9 1022.9 1023.9 1027.1 1035.0 1040.5 DAY 5 22 20 15 23 17 26 25 17 26 9 25 MIN. QNH PRESSURE IN HPA 1011.9 1011.3 1005.3 1004.0 997.3 997.8 1000.1 1002.7 1005.9 1010.8 1004.3 1012.2 997.3 DAY 13 17 26 27 6 22 6 16 2 20 4 16 MEAN QFF PRESSURE IN HPA 1024.6 1026.3 1020.1 1012.7 1011.7 1008.9 1007.1 1010.6 1013.3 1016.8 1018.5 1025.9 1016.4 MAX. QFF PRESSURE IN HPA 1035.5 1040.7 1032.8 1024.8 1023.3 1016.6 1012.1 1017.3 1023.3 1024.2 1027.3 1035.1 1040.7 DAY 5 22 20 15 23 17 26 25 17 26 9 25 MIN. QFF PRESSURE IN HPA 1012.1 1011.5 1005.6 1004.3 997.7 998.2 1000.5 1003.1 1006.3 1011.2 1004.7 1012.4 997.7 DAY 13 17 26 27 6 22 6 16 2 20 4 16 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1027.3 1029.1 1022.9 1015.7 1014.7 1011.8 1010.1 1013.5 1016.2 1019.5 1021.1 1028.6 1019.2 MAX. QFE PRESSURE IN HPA 1038.1 1043.7 1036.1 1027.5 1026.7 1019.6 1014.4 1019.4 1025.7 1026.1 1029.8 1037.8 1043.7 DAY 31 22 20 1 23 17 26 25 17 26 9 25 MIN. QFE PRESSURE IN HPA 1013.8 1015.4 1010.2 1007.6 999.8 1001.6 1002.8 1006.7 1010.0 1013.9 1007.9 1013.0 999.8 DAY 13 15 26 22 6 30 6 17 1 21 4 16 MEAN QNH PRESSURE IN HPA 1024.6 1026.4 1020.2 1013.0 1012.0 1009.1 1007.4 1010.8 1013.5 1016.7 1018.3 1025.8 1016.5 MAX. QNH PRESSURE IN HPA 1035.4 1040.9 1033.4 1024.8 1024.0 1016.9 1011.7 1016.7 1023.0 1023.4 1027.1 1035.1 1040.9 DAY 31 22 20 1 23 17 26 25 17 26 9 25 MIN. QNH PRESSURE IN HPA 1011.1 1012.7 1007.5 1004.9 997.1 998.9 1000.1 1004.0 1007.3 1011.2 1005.2 1010.3 997.1 DAY 13 15 26 22 6 30 6 17 1 21 4 16 MEAN QFF PRESSURE IN HPA 1024.7 1026.6 1020.4 1013.3 1012.3 1009.5 1007.8 1011.2 1013.8 1017.1 1018.6 1026.1 1016.8 MAX. QFF PRESSURE IN HPA 1035.5 1041.1 1033.5 1025.0 1024.3 1017.2 1012.1 1017.1 1023.4 1023.7 1027.3 1035.2 1041.1 DAY 31 22 20 1 23 17 26 25 17 26 9 25 MIN. QFF PRESSURE IN HPA 1011.3 1012.9 1007.8 1005.2 997.5 999.3 1000.5 1004.4 1007.7 1011.5 1005.5 1010.5 997.5 DAY 13 15 26 22 6 30 6 17 13 21 4 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1028.2 1030.0 1023.9 1016.4 1015.3 1012.3 1010.5 1014.1 1016.9 1020.3 1022.1 1029.6 1020.0 MAX. QFE PRESSURE IN HPA 1038.9 1044.3 1036.7 1029.2 1027.2 1020.7 1014.9 1019.9 1026.7 1026.0 1030.5 1040.6 1044.3 DAY 31 22 20 1 23 17 16 25 17 26 11 23 MIN. QFE PRESSURE IN HPA 1014.1 1016.2 1012.4 1008.2 1001.0 1002.7 1003.3 1007.9 1009.6 1013.9 1010.1 1013.0 1001.0 DAY 13 17 25 3 6 30 6 17 13 21 3 16 MEAN QNH PRESSURE IN HPA 1025.5 1027.3 1021.2 1013.7 1012.6 1009.6 1007.8 1011.4 1014.2 1017.5 1019.4 1026.9 1017.3 MAX. QNH PRESSURE IN HPA 1036.2 1041.5 1034.0 1026.5 1024.5 1018.0 1012.2 1017.2 1024.0 1023.3 1027.8 1037.8 1041.5 DAY 31 22 20 1 23 17 16 25 17 26 11 23 MIN. QNH PRESSURE IN HPA 1011.4 1013.5 1009.7 1005.5 998.3 1000.0 1000.6 1005.2 1006.9 1011.2 1007.4 1010.3 998.3 DAY 13 17 25 3 6 30 6 17 13 21 3 16 MEAN QFF PRESSURE IN HPA 1025.7 1027.4 1021.4 1014.0 1013.0 1010.0 1008.2 1011.8 1014.6 1017.9 1019.7 1027.1 1017.6 MAX. QFF PRESSURE IN HPA 1036.3 1041.7 1034.1 1026.7 1024.8 1018.4 1012.6 1017.6 1024.4 1023.6 1028.1 1038.0 1041.7 DAY 31 22 20 1 23 17 26 25 17 26 11 23 MIN. QFF PRESSURE IN HPA 1011.6 1013.7 1010.0 1005.8 998.7 1000.4 1001.0 1005.6 1007.3 1011.6 1007.7 1010.5 998.7 DAY 13 17 25 3 6 30 6 17 13 21 3 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1027.4 1029.7 1023.8 1016.1 1015.4 1012.1 1010.2 1014.0 1016.5 1019.9 1021.5 1029.2 1019.6 MAX. QFE PRESSURE IN HPA 1038.6 1043.7 1035.9 1028.4 1027.0 1020.8 1015.0 1021.0 1027.0 1026.5 1030.0 1040.2 1043.7 DAY 31 22 20 1 23 17 25 24 17 8 11 23 MIN. QFE PRESSURE IN HPA 1012.2 1016.3 1011.4 1007.1 1000.4 1002.6 1003.8 1007.6 1008.0 1013.4 1009.2 1012.0 1000.4 DAY 13 17 25 3 6 30 6 17 13 21 3 16 MEAN QNH PRESSURE IN HPA 1024.7 1026.9 1021.0 1013.4 1012.7 1009.4 1007.5 1011.3 1013.8 1017.2 1018.8 1026.5 1016.9 MAX. QNH PRESSURE IN HPA 1035.9 1040.9 1033.2 1025.7 1024.3 1018.1 1012.3 1018.3 1024.3 1023.8 1027.3 1037.4 1040.9 DAY 31 22 20 1 23 17 25 24 17 8 11 23 MIN. QNH PRESSURE IN HPA 1009.5 1013.6 1008.7 1004.4 997.7 999.9 1001.1 1004.9 1005.3 1010.7 1006.5 1009.3 997.7 DAY 13 17 25 3 6 30 6 17 13 21 3 16 MEAN QFF PRESSURE IN HPA 1024.7 1027.1 1021.2 1013.3 1013.4 1009.8 1008.0 1011.9 1014.4 1017.5 1019.0 1026.8 1017.3 MAX. QFF PRESSURE IN HPA 1036.0 1041.1 1033.3 1024.6 1024.6 1018.5 1012.7 1018.7 1024.6 1024.1 1027.6 1037.6 1041.1 DAY 31 22 20 15 23 17 25 24 17 8 11 23 MIN. QFF PRESSURE IN HPA 1009.7 1013.8 1009.0 1004.7 998.1 1000.3 1001.5 1005.3 1005.7 1011.1 1006.9 1009.6 998.1 DAY 13 17 25 3 6 30 6 17 13 21 3 16 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1026.6 1028.6 1022.9 1015.1 1014.9 1011.4 1009.5 1013.3 1015.6 1018.8 1020.4 1028.3 1018.8 MAX. QFE PRESSURE IN HPA 1038.8 1042.4 1034.5 1026.3 1026.4 1020.0 1014.3 1020.6 1026.9 1026.7 1029.8 1039.0 1042.4 DAY 4 22 15 1 23 17 25 24 17 25 11 23 MIN. QFE PRESSURE IN HPA 1010.4 1015.5 1009.5 1005.4 1000.1 1002.1 1002.8 1007.1 1007.6 1013.2 1006.5 1012.3 1000.1 DAY 13 17 25 3 6 30 6 17 13 6 3 16 MEAN QNH PRESSURE IN HPA 1023.8 1025.9 1020.2 1012.4 1012.2 1008.7 1006.8 1010.6 1012.9 1016.1 1017.7 1025.5 1016.1 MAX. QNH PRESSURE IN HPA 1036.1 1039.6 1031.8 1023.6 1023.7 1017.3 1011.6 1017.9 1024.2 1024.0 1027.1 1036.2 1039.6 DAY 4 22 15 1 23 17 25 24 17 25 11 23 MIN. QNH PRESSURE IN HPA 1007.7 1012.8 1006.8 1002.7 997.4 999.4 1000.1 1004.4 1004.9 1010.5 1003.8 1009.6 997.4 DAY 13 17 25 3 6 30 6 17 13 6 3 16 MEAN QFF PRESSURE IN HPA 1024.0 1026.1 1020.4 1012.7 1012.5 1009.1 1007.2 1011.0 1013.3 1016.5 1018.0 1025.8 1016.4 MAX. QFF PRESSURE IN HPA 1036.2 1039.8 1032.0 1023.8 1024.0 1017.7 1012.0 1018.3 1024.5 1024.3 1027.4 1036.4 1039.8 DAY 4 22 15 1 23 17 25 24 17 25 11 23 MIN. QFF PRESSURE IN HPA 1007.9 1013.0 1007.1 1003.0 997.8 999.8 1000.5 1004.8 1005.3 1010.9 1004.1 1009.8 997.8 DAY 13 17 25 3 6 30 6 17 13 20 3 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1027.1 1029.1 1023.0 1014.7 1014.5 1010.8 1009.1 1013.0 1015.4 1018.7 1021.0 1028.7 1018.7 MAX. QFE PRESSURE IN HPA 1039.9 1042.9 1034.8 1025.3 1025.7 1019.5 1014.0 1018.6 1026.9 1027.5 1029.9 1039.8 1042.9 DAY 4 22 19 1 23 17 25 24 17 25 11 31 MIN. QFE PRESSURE IN HPA 1011.4 1014.5 1008.1 1005.3 1000.4 1000.6 1002.8 1006.4 1007.7 1011.9 1007.0 1016.4 1000.4 DAY 13 14 25 3 6 21 6 16 1 21 3 16 MEAN QNH PRESSURE IN HPA 1024.4 1026.3 1020.3 1012.0 1011.8 1008.1 1006.4 1010.3 1012.7 1015.9 1018.2 1026.0 1016.0 MAX. QNH PRESSURE IN HPA 1037.1 1040.1 1032.1 1022.6 1023.0 1016.8 1011.3 1015.9 1024.2 1024.8 1027.2 1037.0 1040.1 DAY 4 22 19 1 23 17 25 24 17 25 11 31 MIN. QNH PRESSURE IN HPA 1008.7 1011.8 1005.4 1002.6 997.7 997.9 1000.1 1003.7 1005.0 1009.2 1004.3 1013.7 997.7 DAY 13 14 25 3 6 21 6 16 1 21 3 16 MEAN QFF PRESSURE IN HPA 1024.6 1026.5 1020.5 1012.3 1012.1 1008.5 1006.8 1010.7 1013.1 1016.3 1018.5 1026.2 1016.3 MAX. QFF PRESSURE IN HPA 1037.3 1040.3 1032.2 1022.8 1023.3 1017.2 1011.7 1016.3 1024.5 1025.1 1027.4 1037.2 1040.3 DAY 4 22 19 1 23 17 25 24 17 25 11 31 MIN. QFF PRESSURE IN HPA 1008.9 1012.0 1005.7 1002.9 998.1 998.3 1000.5 1004.1 1005.4 1009.6 1004.6 1013.9 998.1 DAY 13 14 25 3 6 21 6 16 1 21 3 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1027.3 1029.3 1023.3 1015.2 1015.4 1011.5 1009.7 1013.6 1016.3 1019.1 1021.4 1029.2 1019.3 MAX. QFE PRESSURE IN HPA 1041.0 1043.4 1035.3 1027.1 1026.0 1019.7 1015.0 1020.6 1027.2 1028.8 1030.1 1039.8 1043.4 DAY 4 21 19 14 23 17 25 24 17 25 8 31 MIN. QFE PRESSURE IN HPA 1011.9 1014.3 1008.4 1007.4 1000.7 1000.1 1003.9 1006.8 1007.5 1012.7 1008.8 1018.0 1000.1 DAY 13 14 25 26 5 21 5 16 1 21 3 16 MEAN QNH PRESSURE IN HPA 1024.6 1026.6 1020.6 1012.5 1012.7 1008.8 1007.0 1010.9 1013.6 1016.4 1018.7 1026.4 1016.6 MAX. QNH PRESSURE IN HPA 1038.2 1040.6 1032.6 1024.4 1023.3 1017.0 1012.3 1017.9 1024.5 1026.1 1027.4 1037.0 1040.6 DAY 4 21 19 14 23 17 25 24 17 25 8 31 MIN. QNH PRESSURE IN HPA 1009.2 1011.6 1005.7 1004.7 998.0 997.4 1001.2 1004.1 1004.8 1010.0 1006.1 1015.3 997.4 DAY 13 14 25 26 5 21 5 16 1 21 3 16 MEAN QFF PRESSURE IN HPA 1024.8 1026.8 1020.8 1012.8 1013.0 1009.2 1007.4 1011.3 1014.0 1016.8 1019.0 1026.7 1016.9 MAX. QFF PRESSURE IN HPA 1038.4 1040.8 1032.7 1024.7 1023.6 1017.4 1012.7 1018.3 1024.8 1026.4 1027.6 1037.2 1040.8 DAY 4 21 19 14 23 17 25 24 17 25 8 31 MIN. QFF PRESSURE IN HPA 1009.4 1011.8 1006.0 1005.0 998.4 997.8 1001.6 1004.5 1005.2 1010.4 1006.5 1015.5 997.8 DAY 13 14 25 26 5 21 5 16 1 21 3 16 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1027.2 1028.9 1022.9 1015.3 1015.0 1011.5 1009.7 1013.5 1016.1 1019.1 1021.0 1028.6 1019.1 MAX. QFE PRESSURE IN HPA 1039.5 1043.6 1035.4 1027.2 1025.8 1019.1 1015.0 1020.0 1026.3 1027.7 1029.9 1038.2 1043.6 DAY 4 21 19 14 22 16 25 24 17 25 8 23 MIN. QFE PRESSURE IN HPA 1012.4 1013.9 1007.8 1006.7 1000.9 999.6 1003.3 1007.5 1007.7 1013.3 1008.3 1016.9 999.6 DAY 13 14 25 26 5 21 5 16 1 18 3 15 MEAN QNH PRESSURE IN HPA 1024.5 1026.1 1020.2 1012.5 1012.3 1008.8 1007.0 1010.8 1013.4 1016.4 1018.3 1025.9 1016.4 MAX. QNH PRESSURE IN HPA 1036.7 1040.8 1032.7 1024.5 1023.1 1016.4 1012.3 1017.3 1023.6 1025.0 1027.2 1035.5 1040.8 DAY 4 21 19 14 22 16 25 24 17 25 8 23 MIN. QNH PRESSURE IN HPA 1009.7 1011.2 1005.1 1004.0 998.2 996.9 1000.6 1004.8 1005.0 1010.6 1005.6 1014.2 996.9 DAY 13 14 25 26 5 21 5 16 1 18 3 15 MEAN QFF PRESSURE IN HPA 1024.7 1026.3 1020.4 1012.8 1012.7 1009.2 1007.4 1011.2 1013.8 1016.7 1018.6 1026.1 1016.7 MAX. QFF PRESSURE IN HPA 1036.9 1041.0 1032.8 1024.8 1023.4 1016.8 1012.7 1017.7 1023.9 1025.3 1027.4 1035.6 1041.0 DAY 4 21 19 14 22 16 25 24 17 25 8 23 MIN. QFF PRESSURE IN HPA 1010.0 1011.4 1005.4 1004.3 998.6 997.3 1001.0 1005.2 1005.4 1011.0 1006.0 1014.4 997.3 DAY 13 14 25 26 5 21 5 16 1 18 3 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.3 7.5 8.6 13.2 17.8 21.4 24.4 25.1 20.5 18.3 11.9 8.1 15.1 MINIMUN AIR TEMPERATURE (C) 1.1 4.1 6.0 9.8 14.5 18.3 20.8 22.0 17.7 14.9 7.8 4.3 11.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 14 26 4 0 0 0 48 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 13 1 1 0 0 0 0 0 0 0 0 2 17 TEMPERATURE RECORDS LOWEST(C) -3.0 -2.0 0.0 6.0 9.0 12.0 18.0 18.0 10.0 6.0 2.0 0.0 -3.0 DAY 25 7 10 12 6 10 3 30 27 31 26 14 MAXIMUM AIR TEMPERATURE (C) 8.5 12.2 12.2 16.9 21.0 24.6 28.1 28.7 23.9 21.9 17.5 12.9 19.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 6 16 0 0 0 0 22 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.0 20.0 22.0 28.0 25.0 29.0 32.0 31.0 28.0 25.0 28.0 19.0 32.0 DAY 12 19 2 18 17 14 16 3 5 6 15 16 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 8.1 6.2 7.1 6.5 6.3 7.3 6.7 6.2 7.0 9.7 8.6 7.2 MEAN DAILY TEMP. (MDT) (C) 4.8 8.2 9.1 13.3 17.7 21.5 24.4 25.4 20.8 18.4 12.6 8.6 15.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.0 32.5 106.5 136.0 25.0 0.5 0.0 0.0 301.5 HEATING DEG. DAYS(BASE 18 0C) 409.5 275.0 276.5 143.0 34.5 1.5 0.0 0.0 7.5 26.5 163.0 292.5 1629.5 DEWPOINT (MEAN C) 1.3 5.1 6.4 10.3 15.4 17.9 20.3 22.1 17.9 16.0 8.7 5.2 12.2 MIXING RATIO (G/KG) 4.18 5.48 5.98 7.81 11.07 13.00 15.25 16.84 12.91 11.46 7.19 5.53 9.72 VAPOUR PRESSURE (HPA) 6.85 8.89 9.71 12.59 17.73 20.71 24.13 26.68 20.69 18.44 11.63 9.02 15.59 SATURATION DEF. (HPA) 1.62 1.69 1.65 2.76 2.97 5.15 6.73 5.49 3.77 2.98 2.78 2.03 3.30 RELATIVE HUMIDITY (MEAN %) 82 86 87 84 87 81 79 84 86 87 82 83 84 RELATIVE HUMIDITY (MAX. %) 94 97 97 94 95 92 92 96 96 96 95 96 95 RELATIVE HUMIDITY (MIN. %) 65 70 73 72 76 68 67 71 74 74 65 66 70 RELATIVE HUMIDITY (MEAN% 03UTC) 88 92 92 90 93 87 84 92 92 94 87 89 90 RELATIVE HUMIDITY (MEAN% 09UTC) 68 75 81 77 81 74 70 75 77 77 68 69 74 RELATIVE HUMIDITY (MEAN% 15UTC) 86 86 83 83 84 76 75 80 85 88 86 86 83 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 37.2 31.4 80.9 18.6 71.5 55.7 4.9 99.0 343.4 65.9 43.2 151.6 1003.3 DAYS WITH PRECIPITATION >=10 1 1 2 0 3 2 0 3 8 3 1 3 27 DAYS WITH PRECIPITATION >= 5 2 3 7 1 3 3 0 5 10 5 3 6 48 DAYS WITH PRECIPITATION >= 1 8 8 11 7 5 4 2 14 15 10 8 13 105 DAYS WITH PRECIPITATION 10 11 21 11 10 8 3 16 16 14 15 15 150 GREATEST DAILY PRECIPITATION 15.0 10.0 23.0 6.0 31.0 24.0 3.0 39.0 150.0 17.4 15.0 72.0 150.0 DAY 9 5 8 24 3 5 30 29 26 27 19 12 DAY WITH THUNDER STORM 0 1 0 2 2 1 0 0 0 0 0 0 6 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 0 1 WIND DIRECTION (PREVAILING) 315 315 315 90 45 315 315 225 360 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 10.1 7.4 8.8 5.3 4.4 6.8 9.0 3.9 5.6 8.9 10.3 9.1 8.5 PREVAILING WIND PERCENT 13.4 8.5 19.8 17.6 17.0 13.0 13.8 9.3 7.1 8.1 10.8 13.3 10.9 CALMS PERCENT OF WIND 55.1 61.0 49.0 49.4 51.4 53.6 57.9 59.3 61.3 65.3 56.7 55.6 56.3 NO. OF WIND OBSERVATION 247 223 247 239 247 239 247 248 240 248 240 248 2913 VECTOR WIND DIRECTION (MEAN) 320 8 352 35 30 356 348 329 338 322 333 304 347 VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.8 1.4 1.0 1.5 1.3 1.8 1.0 0.5 0.9 1.3 1.1 1.0 WIND STEADINESES (MEAN %) 48.1 42.1 40.0 33.3 57.7 48.1 69.2 47.6 27.8 42.9 44.8 42.3 40.0 WIND SPEED (MEAN KNOTS) 2.7 1.9 3.5 3.0 2.6 2.7 2.6 2.1 1.8 2.1 2.9 2.6 2.5 FASTEST WIND DIRECTION 310 330 300 300 310 310 320 310 310 300 290 300 300 FASTEST WIND SPEED (KNOTS) 18 17 30 17 20 13 16 13 15 25 28 17 30 DAY 13 19 13 24 21 4 15 6 25 27 5 18 DAYS WITH SKY CLEAR (0-2)/8 12 9 3 4 11 10 11 5 6 7 10 10 98 DAYS WITH P.CLOUDY (3-6)/8 8 7 9 12 10 6 12 11 4 8 9 10 106 DAYS WITH CLOUDY (7-8)/8 11 12 19 14 10 14 8 15 20 16 11 11 161 DAYS WITH VISIBILITY =< 2 KM 1 7 4 1 3 0 0 2 5 2 0 0 25 DURATION OF SUNSHINE HOURS 145.1 130.6 94.6 140.2 192.7 115.7 156.8 107.9 58.3 78.3 123.9 134.0 1478.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1026.2 1018.6 1021.1 1015.2 1015.6 1013.1 1009.3 1012.7 1018.5 1019.8 1020.4 1024.1 1017.9 MAX. QFE PRESSURE IN HPA 1044.8 1032.6 1034.6 1028.7 1027.8 1022.0 1016.7 1019.5 1032.4 1032.1 1035.6 1035.4 1044.8 DAY-HOUR 24-18 2- 6 9- 9 10-18 7-21 5-18 22- 6 30- 3 26- 9 27- 6 20- 6 21- 6 MIN. QFE PRESSURE IN HPA 1005.9 999.1 1005.1 1000.0 1001.0 1003.6 1000.1 1003.6 1009.2 1007.2 1005.9 1005.7 999.1 DAY-HOUR 13- 3 22- 9 3-18 18-15 30- 0 27- 0 28-21 9-15 8-21 31-21 1- 0 17-15 MEAN QNH PRESSURE IN HPA 1023.4 1015.9 1018.4 1012.5 1012.9 1010.4 1006.6 1010.0 1015.8 1017.1 1017.7 1021.4 1015.2 MAX. QNH PRESSURE IN HPA 1042.0 1029.9 1031.9 1026.0 1025.1 1019.3 1014.0 1016.8 1029.7 1029.4 1032.9 1032.7 1042.0 DAY-HOUR 24-18 2- 6 9- 9 10-18 7-21 5-18 22- 6 30- 3 26- 9 27- 6 20- 6 21- 6 MIN. QNH PRESSURE IN HPA 1003.2 996.4 1002.4 997.3 998.3 1000.9 997.4 1000.9 1006.5 1004.5 1003.2 1003.0 996.4 DAY-HOUR 13- 3 22- 9 3-18 18-15 30- 0 27- 0 28-21 9-15 8-21 31-21 1- 0 17-15 MEAN QFF PRESSURE IN HPA 1023.6 1016.1 1018.6 1012.8 1013.2 1010.7 1007.0 1010.4 1016.1 1017.4 1017.9 1021.7 1015.5 MAX. QFF PRESSURE IN HPA 1042.2 1030.1 1032.1 1026.3 1025.4 1019.6 1014.4 1017.1 1030.0 1029.7 1033.1 1032.9 1042.2 DAY-HOUR 24-18 2- 6 9- 9 10-18 7-21 5-18 22- 6 30- 6 26- 9 27- 6 20- 6 21- 6 MIN. QFF PRESSURE IN HPA 1003.5 996.7 1002.7 997.7 998.7 1001.3 997.9 1001.3 1006.9 1004.8 1003.5 1003.3 996.7 DAY-HOUR 13- 3 22- 9 3-18 18-15 30- 0 27- 3 29- 0 9-15 9- 0 31-21 1- 0 17-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1026.3 1018.1 1020.7 1014.7 1015.1 1012.6 1009.2 1012.5 1018.1 1019.5 1020.0 1023.6 1017.5 MAX. QFE PRESSURE IN HPA 1044.4 1030.9 1032.4 1027.3 1026.1 1020.8 1015.9 1018.9 1028.3 1028.9 1034.1 1034.9 1044.4 DAY 26 2 10 11 8 6 23 30 27 27 20 31 MIN. QFE PRESSURE IN HPA 1006.3 1005.8 1007.3 1002.6 1001.0 1003.6 1000.1 1005.5 1009.2 1012.0 1005.9 1007.7 1000.1 DAY 13 22 4 21 30 27 29 10 9 24 1 17 MEAN QNH PRESSURE IN HPA 1023.6 1015.4 1018.0 1012.0 1012.4 1009.9 1006.5 1009.8 1015.4 1016.8 1017.3 1020.9 1014.8 MAX. QNH PRESSURE IN HPA 1041.6 1028.2 1029.7 1024.6 1023.4 1018.1 1013.2 1016.2 1025.6 1026.2 1031.4 1032.2 1041.6 DAY 26 2 10 11 8 6 23 30 27 27 20 31 MIN. QNH PRESSURE IN HPA 1003.6 1003.1 1004.6 999.9 998.3 1000.9 997.4 1002.8 1006.5 1009.3 1003.2 1005.0 997.4 DAY 13 22 4 21 30 27 29 10 9 24 1 17 MEAN QFF PRESSURE IN HPA 1023.8 1015.7 1018.2 1012.3 1012.7 1010.3 1006.9 1010.2 1015.8 1017.1 1017.6 1021.2 1015.1 MAX. QFF PRESSURE IN HPA 1041.8 1028.4 1029.9 1024.9 1023.7 1018.4 1013.6 1016.5 1025.9 1026.5 1031.6 1032.4 1041.8 DAY 26 2 10 11 8 6 23 30 27 27 20 31 MIN. QFF PRESSURE IN HPA 1003.9 1003.4 1004.9 1000.2 998.7 1001.3 997.9 1003.2 1006.9 1009.6 1003.5 1005.3 997.9 DAY 13 22 4 21 30 27 29 10 9 24 1 17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1026.0 1018.4 1021.1 1015.0 1015.8 1013.2 1009.8 1013.4 1018.5 1020.1 1020.3 1023.7 1017.9 MAX. QFE PRESSURE IN HPA 1043.3 1031.5 1033.0 1027.3 1025.6 1021.0 1016.4 1019.5 1028.7 1030.5 1034.5 1035.1 1043.3 DAY 25 2 9 11 8 6 23 30 26 27 20 21 MIN. QFE PRESSURE IN HPA 1005.9 1002.4 1008.6 1003.6 1002.0 1003.6 1001.7 1007.0 1010.1 1012.2 1006.7 1007.4 1001.7 DAY 13 22 2 21 30 27 29 9 9 24 1 17 MEAN QNH PRESSURE IN HPA 1023.2 1015.6 1018.4 1012.3 1013.1 1010.5 1007.1 1010.7 1015.8 1017.4 1017.6 1021.0 1015.2 MAX. QNH PRESSURE IN HPA 1040.5 1028.8 1030.3 1024.6 1022.9 1018.3 1013.7 1016.8 1026.0 1027.8 1031.8 1032.4 1040.5 DAY 25 2 9 11 8 6 23 30 26 27 20 21 MIN. QNH PRESSURE IN HPA 1003.2 999.7 1005.9 1000.9 999.3 1000.9 999.0 1004.3 1007.4 1009.5 1004.0 1004.7 999.0 DAY 13 22 2 21 30 27 29 9 9 24 1 17 MEAN QFF PRESSURE IN HPA 1023.4 1015.9 1018.6 1012.6 1013.4 1010.9 1007.5 1011.1 1016.2 1017.7 1017.9 1021.2 1015.5 MAX. QFF PRESSURE IN HPA 1040.7 1029.0 1030.5 1024.8 1023.2 1018.6 1014.1 1017.1 1026.3 1028.1 1032.0 1032.6 1040.7 DAY 26 2 9 11 8 6 23 30 26 27 20 21 MIN. QFF PRESSURE IN HPA 1003.5 1000.0 1006.2 1001.2 999.7 1001.3 999.4 1004.7 1007.8 1009.8 1004.3 1005.0 999.4 DAY 13 22 2 21 30 27 29 9 9 24 1 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1027.2 1019.2 1022.0 1015.8 1016.3 1013.7 1010.0 1013.8 1019.3 1021.1 1021.2 1024.8 1018.7 MAX. QFE PRESSURE IN HPA 1043.9 1032.6 1034.4 1027.7 1026.7 1021.4 1016.7 1019.5 1031.7 1032.1 1035.6 1035.4 1043.9 DAY 25 2 9 11 7 6 22 30 26 27 20 21 MIN. QFE PRESSURE IN HPA 1008.3 1000.6 1009.1 1004.8 1004.4 1005.4 1002.9 1007.0 1011.4 1013.5 1008.2 1007.9 1000.6 DAY 13 22 2 21 30 16 29 9 9 24 1 17 MEAN QNH PRESSURE IN HPA 1024.5 1016.5 1019.2 1013.1 1013.6 1011.0 1007.3 1011.1 1016.6 1018.4 1018.5 1022.1 1016.0 MAX. QNH PRESSURE IN HPA 1041.1 1029.9 1031.7 1025.0 1024.0 1018.7 1014.0 1016.8 1029.0 1029.4 1032.9 1032.7 1041.1 DAY 25 2 9 11 7 6 22 30 26 27 20 21 MIN. QNH PRESSURE IN HPA 1005.6 997.9 1006.4 1002.1 1001.7 1002.7 1000.2 1004.3 1008.7 1010.8 1005.5 1005.2 997.9 DAY 13 22 2 21 30 16 29 9 9 24 1 17 MEAN QFF PRESSURE IN HPA 1024.7 1016.7 1019.5 1013.4 1013.9 1011.3 1007.7 1011.5 1017.0 1018.7 1018.8 1022.4 1016.3 MAX. QFF PRESSURE IN HPA 1041.3 1030.1 1031.9 1025.3 1024.3 1019.0 1014.4 1017.1 1029.3 1029.7 1033.1 1032.9 1041.3 DAY 25 2 9 11 7 6 22 30 26 27 20 21 MIN. QFF PRESSURE IN HPA 1005.9 998.2 1006.7 1002.4 1002.1 1003.1 1000.6 1004.7 1009.1 1011.1 1005.8 1005.5 998.2 DAY 13 22 2 21 30 16 29 9 9 24 1 17 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1026.5 1019.1 1021.6 1015.6 1016.1 1013.6 1009.7 1013.3 1018.8 1020.5 1020.3 1024.6 1018.3 MAX. QFE PRESSURE IN HPA 1043.3 1031.8 1034.6 1027.5 1027.2 1021.8 1016.6 1018.9 1032.4 1031.5 1034.1 1034.9 1043.3 DAY 25 2 9 11 7 4 22 30 26 27 20 21 MIN. QFE PRESSURE IN HPA 1009.3 999.1 1009.6 1004.4 1004.1 1006.1 1003.0 1006.1 1011.4 1013.7 1007.6 1006.4 999.1 DAY 13 22 2 8 30 15 29 9 9 24 1 17 MEAN QNH PRESSURE IN HPA 1023.7 1016.4 1018.9 1012.9 1013.4 1010.9 1007.0 1010.6 1016.1 1017.8 1017.6 1021.9 1015.6 MAX. QNH PRESSURE IN HPA 1040.5 1029.1 1031.9 1024.8 1024.5 1019.1 1013.9 1016.2 1029.7 1028.8 1031.4 1032.2 1040.5 DAY 25 2 9 11 7 4 22 30 26 27 20 21 MIN. QNH PRESSURE IN HPA 1006.6 996.4 1006.9 1001.7 1001.4 1003.4 1000.3 1003.4 1008.7 1011.0 1004.9 1003.7 996.4 DAY 13 22 2 8 30 15 29 9 9 24 1 17 MEAN QFF PRESSURE IN HPA 1023.5 1016.5 1019.3 1013.2 1013.6 1011.2 1007.3 1011.0 1016.5 1018.2 1017.9 1022.1 1015.9 MAX. QFF PRESSURE IN HPA 1040.7 1029.3 1032.1 1025.1 1024.8 1019.4 1014.3 1016.5 1030.0 1029.1 1031.6 1032.4 1040.7 DAY 25 2 9 11 7 4 22 30 26 27 20 26 MIN. QFF PRESSURE IN HPA 1006.9 996.7 1007.2 1002.0 1001.8 1003.8 1000.7 1003.8 1009.1 1011.3 1005.2 1004.0 996.7 DAY 13 22 2 8 30 15 29 9 9 24 1 17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1025.4 1018.1 1020.5 1015.0 1015.4 1013.0 1009.0 1012.2 1017.9 1019.5 1019.5 1023.7 1017.4 MAX. QFE PRESSURE IN HPA 1042.4 1029.8 1033.7 1027.9 1027.0 1021.9 1015.7 1017.2 1032.4 1029.8 1032.0 1034.2 1042.4 DAY 24 2 9 10 7 4 22 30 26 27 6 26 MIN. QFE PRESSURE IN HPA 1008.1 999.3 1006.9 1002.7 1002.9 1005.0 1002.0 1004.9 1012.0 1012.6 1007.6 1005.9 999.3 DAY 31 22 3 18 30 15 29 9 8 31 1 17 MEAN QNH PRESSURE IN HPA 1022.7 1015.4 1017.8 1012.3 1012.7 1010.3 1006.3 1009.5 1015.2 1016.8 1016.8 1021.0 1014.7 MAX. QNH PRESSURE IN HPA 1039.6 1027.1 1031.0 1025.2 1024.3 1019.2 1013.0 1014.5 1029.7 1027.1 1029.3 1031.5 1039.6 DAY 24 2 9 10 7 4 22 30 26 27 6 26 MIN. QNH PRESSURE IN HPA 1005.4 996.6 1004.2 1000.0 1000.2 1002.3 999.3 1002.2 1009.3 1009.9 1004.9 1003.2 996.6 DAY 31 22 3 18 30 15 29 9 8 31 1 17 MEAN QFF PRESSURE IN HPA 1022.9 1015.6 1018.0 1012.6 1013.0 1010.7 1006.7 1009.9 1015.6 1017.1 1017.1 1021.2 1015.0 MAX. QFF PRESSURE IN HPA 1039.8 1027.3 1031.2 1025.5 1024.6 1019.5 1013.4 1014.9 1030.0 1027.4 1029.5 1031.7 1039.8 DAY 24 2 9 10 7 4 22 30 26 27 20 26 MIN. QFF PRESSURE IN HPA 1005.6 996.9 1004.5 1000.4 1000.6 1002.7 999.8 1002.6 1009.7 1010.2 1005.3 1003.5 996.9 DAY 31 22 3 18 30 15 29 9 8 31 1 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1025.9 1018.5 1020.6 1014.9 1015.0 1012.7 1008.5 1011.6 1017.8 1019.3 1020.3 1024.0 1017.4 MAX. QFE PRESSURE IN HPA 1044.4 1029.8 1034.2 1027.3 1026.6 1021.5 1015.7 1017.1 1031.8 1028.1 1032.6 1034.4 1044.4 DAY 24 2 9 10 7 4 22 6 26 27 6 26 MIN. QFE PRESSURE IN HPA 1008.7 1001.6 1006.8 1000.0 1002.3 1004.3 1002.0 1003.6 1010.9 1010.7 1008.4 1005.7 1000.0 DAY 31 22 3 18 28 12 28 9 8 31 1 17 MEAN QNH PRESSURE IN HPA 1023.2 1015.8 1017.9 1012.2 1012.3 1010.0 1005.8 1008.9 1015.1 1016.6 1017.5 1021.3 1014.7 MAX. QNH PRESSURE IN HPA 1041.6 1027.1 1031.5 1024.6 1023.9 1018.8 1013.0 1014.4 1029.1 1025.4 1029.9 1031.7 1041.6 DAY 24 2 9 10 7 4 22 6 26 27 6 26 MIN. QNH PRESSURE IN HPA 1006.0 998.9 1004.1 997.3 999.6 1001.6 999.3 1000.9 1008.2 1008.0 1005.7 1003.0 997.3 DAY 31 22 3 18 28 12 28 9 8 31 1 17 MEAN QFF PRESSURE IN HPA 1023.4 1016.0 1018.1 1012.5 1012.6 1010.3 1006.2 1009.3 1015.5 1016.9 1017.8 1021.5 1015.0 MAX. QFF PRESSURE IN HPA 1041.8 1027.3 1031.7 1024.9 1024.2 1019.1 1013.4 1014.8 1029.4 1025.6 1030.1 1031.9 1041.8 DAY 24 2 9 10 7 4 22 6 26 27 6 26 MIN. QFF PRESSURE IN HPA 1006.2 999.2 1004.4 997.7 1000.0 1002.0 999.7 1001.3 1008.6 1008.3 1006.1 1003.3 997.7 DAY 31 22 3 18 28 12 28 9 11 31 1 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1026.1 1019.0 1021.2 1015.7 1015.6 1013.2 1009.2 1012.4 1018.7 1019.4 1020.9 1024.5 1018.0 MAX. QFE PRESSURE IN HPA 1044.8 1030.3 1034.1 1028.7 1027.6 1022.0 1015.8 1018.6 1031.8 1026.3 1032.9 1035.3 1044.8 DAY 24 6 9 10 7 5 22 29 26 22 6 30 MIN. QFE PRESSURE IN HPA 1008.0 1004.7 1005.1 1004.8 1001.6 1004.7 1000.8 1004.1 1010.5 1007.4 1012.7 1006.6 1000.8 DAY 12 22 3 18 28 12 28 9 8 31 2 17 MEAN QNH PRESSURE IN HPA 1023.4 1016.3 1018.4 1013.0 1012.9 1010.5 1006.5 1009.7 1016.0 1016.6 1018.2 1021.8 1015.3 MAX. QNH PRESSURE IN HPA 1042.0 1027.6 1031.4 1026.0 1024.9 1019.3 1013.1 1015.9 1029.1 1023.6 1030.2 1032.6 1042.0 DAY 24 6 9 10 7 5 22 29 26 22 6 30 MIN. QNH PRESSURE IN HPA 1005.3 1002.0 1002.4 1002.1 998.9 1002.0 998.1 1001.4 1007.8 1004.7 1010.0 1003.9 998.1 DAY 12 22 3 18 28 12 28 9 8 31 2 17 MEAN QFF PRESSURE IN HPA 1023.6 1016.6 1018.7 1013.3 1013.2 1010.9 1006.9 1010.1 1016.3 1017.0 1018.4 1022.0 1015.6 MAX. QFF PRESSURE IN HPA 1042.2 1027.7 1031.6 1026.3 1025.2 1019.6 1013.5 1016.2 1029.4 1023.9 1030.4 1032.8 1042.2 DAY 24 6 9 10 7 5 22 29 26 22 6 30 MIN. QFF PRESSURE IN HPA 1005.5 1002.3 1002.7 1002.4 999.3 1002.4 998.6 1001.8 1008.2 1005.0 1010.3 1004.2 998.6 DAY 12 22 3 18 28 12 28 9 8 31 2 17 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1026.0 1018.7 1021.2 1015.3 1015.6 1012.8 1009.0 1012.4 1018.6 1019.0 1020.7 1024.3 1017.8 MAX. QFE PRESSURE IN HPA 1044.7 1029.9 1033.1 1028.3 1027.8 1021.4 1015.9 1018.6 1032.0 1025.5 1032.7 1035.2 1044.7 DAY 24 1 9 10 7 5 22 29 26 22 6 30 MIN. QFE PRESSURE IN HPA 1006.6 1007.1 1005.7 1003.8 1001.7 1004.7 1000.1 1005.0 1009.2 1007.2 1011.9 1007.0 1000.1 DAY 12 22 3 20 29 12 28 9 8 31 29 17 MEAN QNH PRESSURE IN HPA 1023.3 1016.0 1018.5 1012.6 1012.9 1010.1 1006.3 1009.7 1015.9 1016.3 1018.0 1021.5 1015.1 MAX. QNH PRESSURE IN HPA 1041.9 1027.2 1030.4 1025.6 1025.1 1018.7 1013.2 1015.9 1029.3 1022.8 1030.0 1032.5 1041.9 DAY 24 1 9 10 7 5 22 29 26 22 6 30 MIN. QNH PRESSURE IN HPA 1003.9 1004.4 1003.0 1001.1 999.0 1002.0 997.4 1002.3 1006.5 1004.5 1009.2 1004.3 997.4 DAY 12 22 3 20 29 12 28 9 8 31 29 17 MEAN QFF PRESSURE IN HPA 1023.5 1016.3 1018.7 1012.9 1013.2 1010.4 1006.7 1010.1 1016.3 1016.7 1018.3 1021.8 1015.4 MAX. QFF PRESSURE IN HPA 1042.1 1027.4 1030.6 1025.9 1025.4 1019.0 1013.6 1016.2 1029.6 1023.1 1030.2 1032.7 1042.1 DAY 24 1 9 10 7 5 22 29 26 22 6 30 MIN. QFF PRESSURE IN HPA 1004.2 1004.6 1003.3 1001.4 999.4 1002.4 997.9 1002.7 1006.9 1004.8 1009.5 1004.6 997.9 DAY 12 22 3 20 29 12 28 9 8 31 29 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.4 5.3 7.8 11.5 18.3 22.7 23.2 23.5 21.1 18.0 15.0 8.8 15.0 MINIMUN AIR TEMPERATURE (C) 2.9 2.0 5.5 8.6 15.1 18.9 20.4 20.4 17.7 12.5 11.5 4.4 11.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 13 15 3 0 0 0 35 DAYS WITH MINIMUM TEMP. <=-4 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 6 9 2 0 0 0 0 0 0 0 0 4 21 TEMPERATURE RECORDS LOWEST(C) -1.0 -6.0 -1.0 3.0 8.0 14.0 18.0 18.0 14.0 8.0 7.0 0.0 -6.0 DAY 26 9 7 13 2 9 6 10 25 19 28 24 MAXIMUM AIR TEMPERATURE (C) 8.8 8.7 10.6 14.9 21.7 26.1 26.5 27.2 24.8 24.1 19.1 14.0 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 2 4 0 1 1 0 8 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 12.0 15.0 21.0 27.0 28.0 29.0 30.0 31.0 27.0 30.0 30.0 17.0 31.0 DAY 2 9 17 16 4 23 3 21 2 29 3 1 DIF. BETWEEN (MAX.-MIN.) (C) 5.9 6.7 5.1 6.3 6.6 7.2 6.1 6.8 7.1 11.6 7.6 9.6 7.2 MEAN DAILY TEMP. (MDT) (C) 5.9 5.4 8.1 11.7 18.4 22.5 23.5 23.8 21.3 18.3 15.3 9.2 15.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.0 51.0 79.0 87.5 23.0 2.0 0.0 0.0 243.5 HEATING DEG. DAYS(BASE 18 0C) 376.5 354.0 307.5 190.5 21.0 0.0 0.0 0.0 0.0 16.0 86.0 272.5 1624.0 DEWPOINT (MEAN C) 2.9 2.7 5.7 9.1 16.5 19.7 21.1 20.5 18.1 13.7 12.3 5.6 12.3 MIXING RATIO (G/KG) 4.63 4.65 5.73 7.27 11.81 14.52 15.94 15.29 13.08 9.84 8.94 5.73 9.79 VAPOUR PRESSURE (HPA) 7.57 7.60 9.36 11.73 18.89 23.06 25.26 24.26 20.94 15.89 14.48 9.32 15.70 SATURATION DEF. (HPA) 1.49 1.44 1.45 2.24 2.39 4.77 3.57 5.12 4.27 5.33 2.83 2.26 3.10 RELATIVE HUMIDITY (MEAN %) 85 85 87 87 90 84 89 84 84 77 85 82 85 RELATIVE HUMIDITY (MAX. %) 95 97 97 98 99 95 97 96 95 91 95 94 96 RELATIVE HUMIDITY (MIN. %) 70 69 76 73 78 72 78 71 71 60 69 63 71 RELATIVE HUMIDITY (MEAN% 03UTC) 89 92 93 94 95 90 94 90 91 87 92 89 91 RELATIVE HUMIDITY (MEAN% 09UTC) 74 73 78 78 81 77 83 75 74 63 73 66 75 RELATIVE HUMIDITY (MEAN% 15UTC) 85 83 87 83 87 79 87 79 82 78 87 85 84 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.4 77.6 76.8 71.6 11.2 58.0 297.1 50.9 37.3 3.2 97.0 38.4 861.5 DAYS WITH PRECIPITATION >=10 1 2 2 3 0 3 4 1 0 0 3 1 20 DAYS WITH PRECIPITATION >= 5 3 6 6 4 0 5 7 6 3 0 5 2 47 DAYS WITH PRECIPITATION >= 1 12 13 12 15 6 5 13 9 9 2 11 6 113 DAYS WITH PRECIPITATION 17 15 17 16 15 6 17 13 16 2 15 9 158 GREATEST DAILY PRECIPITATION 13.0 27.0 24.0 18.0 4.0 22.0 103.0 15.2 9.0 2.2 32.0 20.0 103.0 DAY 31 1 30 4 1 28 6 2 21 5 7 13 DAY WITH THUNDER STORM 0 0 0 0 3 1 1 1 4 0 0 0 10 DAYS WITH SNOW OR SLEET 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 0 0 0 0 0 0 2 0 0 0 0 2 WIND DIRECTION (PREVAILING) 315 315 315 315 45 45 315 315 315 45 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.3 8.5 7.3 8.1 5.1 5.2 8.0 8.0 7.3 4.0 9.5 8.4 8.0 PREVAILING WIND PERCENT 19.8 10.7 23.8 13.3 16.9 13.8 14.5 10.9 17.9 13.3 11.3 9.3 12.5 CALMS PERCENT OF WIND 50.4 62.5 52.0 49.2 50.0 48.3 48.0 55.2 53.3 64.1 60.8 62.5 54.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 317 334 322 360 16 8 325 323 311 40 322 340 339 VECTOR WIND MAGNITUDE(KNOTS) 1.7 1.1 1.9 1.3 1.6 1.4 1.4 0.8 1.5 0.8 0.9 0.8 1.1 WIND STEADINESES (MEAN %) 56.7 47.8 67.9 43.3 53.3 50.0 50.0 33.3 55.6 53.3 40.9 44.4 44.0 WIND SPEED (MEAN KNOTS) 3.0 2.3 2.8 3.0 3.0 2.8 2.8 2.4 2.7 1.5 2.2 1.8 2.5 FASTEST WIND DIRECTION 310 310 300 310 280 310 320 310 310 70 310 310 310 FASTEST WIND SPEED (KNOTS) 18 18 16 18 14 16 16 15 18 8 25 16 25 DAY 23 20 18 1 23 15 8 22 3 9 26 23 DAYS WITH SKY CLEAR (0-2)/8 4 5 2 3 6 13 6 5 6 21 4 12 87 DAYS WITH P.CLOUDY (3-6)/8 8 8 7 8 16 12 8 11 9 8 13 11 119 DAYS WITH CLOUDY (7-8)/8 19 15 22 19 9 5 17 15 15 2 13 8 159 DAYS WITH VISIBILITY =< 2 KM 1 1 6 2 6 1 6 0 2 1 0 0 26 DURATION OF SUNSHINE HOURS 77.5 73.7 49.5 84.5 175.5 202.9 120.6 115.2 103.8 211.2 99.2 136.4 1450.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1024.5 1026.0 1026.1 1016.0 1014.0 1011.7 1012.0 1012.1 1016.8 1021.3 1022.5 1021.6 1018.7 MAX. QFE PRESSURE IN HPA 1039.8 1036.4 1037.4 1029.7 1022.0 1019.0 1019.2 1022.0 1025.0 1028.9 1032.2 1029.1 1039.8 DAY-HOUR 5- 6 3- 6 9- 6 25- 6 9- 3 7-21 15- 9 25-18 23-18 23- 6 16-18 2-15 MIN. QFE PRESSURE IN HPA 1000.7 1012.7 1003.4 998.4 1000.6 1003.6 1002.1 998.7 1005.5 1009.0 1009.3 1008.2 998.4 DAY-HOUR 21-15 11-21 17- 9 20-12 22-18 26-15 2-21 15-21 2-12 28-15 3- 0 5-12 MEAN QNH PRESSURE IN HPA 1021.7 1023.2 1023.4 1013.3 1011.3 1009.0 1009.3 1009.4 1014.1 1018.6 1019.8 1018.9 1016.0 MAX. QNH PRESSURE IN HPA 1037.0 1033.7 1034.7 1027.0 1019.3 1016.3 1016.5 1019.3 1022.3 1026.2 1029.5 1026.4 1037.0 DAY-HOUR 5- 6 3- 6 9- 6 25- 6 9- 3 7-21 15- 9 25-18 23-18 23- 6 16-18 2-15 MIN. QNH PRESSURE IN HPA 998.0 1010.0 1000.7 995.7 997.9 1000.9 999.4 996.0 1002.8 1006.3 1006.6 1005.5 995.7 DAY-HOUR 21-15 11-21 17- 9 20-12 22-18 26-15 2-21 15-21 2-12 28-15 3- 0 5-12 MEAN QFF PRESSURE IN HPA 1021.9 1023.4 1023.6 1013.6 1011.6 1009.4 1009.6 1009.8 1014.5 1018.9 1020.1 1019.1 1016.3 MAX. QFF PRESSURE IN HPA 1037.3 1033.9 1034.9 1027.2 1019.6 1016.6 1016.9 1019.6 1022.6 1026.5 1029.8 1026.6 1037.3 DAY-HOUR 5- 6 20-21 9- 6 25- 6 9- 3 7-21 15- 9 25-18 23-18 23- 6 17- 6 2-15 MIN. QFF PRESSURE IN HPA 998.3 1010.2 1001.0 996.1 998.3 1001.3 999.8 996.4 1003.2 1006.6 1006.9 1005.8 996.1 DAY-HOUR 21-15 12- 0 17- 9 20-12 22-18 26-15 2-21 15-21 2-15 28-15 3- 0 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1024.3 1025.7 1025.5 1015.6 1013.8 1011.6 1011.6 1011.9 1016.2 1020.9 1021.9 1021.5 1018.4 MAX. QFE PRESSURE IN HPA 1038.8 1033.6 1036.1 1027.1 1019.6 1019.0 1018.0 1021.0 1024.1 1026.7 1032.1 1028.3 1038.8 DAY 5 21 7 1 9 8 15 26 24 14 17 3 MIN. QFE PRESSURE IN HPA 1003.4 1012.7 1005.3 1001.6 1006.2 1004.4 1002.3 998.7 1007.0 1009.6 1009.3 1008.8 998.7 DAY 22 12 17 20 23 27 3 16 2 29 3 6 MEAN QNH PRESSURE IN HPA 1021.6 1022.9 1022.8 1012.9 1011.1 1008.9 1008.9 1009.2 1013.5 1018.2 1019.2 1018.8 1015.7 MAX. QNH PRESSURE IN HPA 1036.1 1030.9 1033.4 1024.4 1016.9 1016.3 1015.3 1018.3 1021.4 1024.0 1029.4 1025.6 1036.1 DAY 5 21 7 1 9 8 15 26 24 14 17 3 MIN. QNH PRESSURE IN HPA 1000.7 1010.0 1002.6 998.9 1003.5 1001.7 999.6 996.0 1004.3 1006.9 1006.6 1006.1 996.0 DAY 22 12 17 20 23 27 3 16 2 29 3 6 MEAN QFF PRESSURE IN HPA 1021.8 1023.2 1023.0 1013.2 1011.4 1009.3 1009.3 1009.6 1013.9 1018.5 1019.5 1019.0 1016.0 MAX. QFF PRESSURE IN HPA 1036.3 1031.1 1033.6 1024.6 1017.2 1016.6 1015.7 1018.6 1021.7 1024.3 1029.7 1025.8 1036.3 DAY 5 21 7 1 9 8 15 26 24 14 17 3 MIN. QFF PRESSURE IN HPA 1001.0 1010.2 1002.9 999.2 1003.9 1002.1 1000.0 996.4 1004.7 1007.3 1006.9 1006.4 996.4 DAY 22 12 17 20 23 27 3 16 2 29 3 6 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1024.4 1025.9 1026.0 1016.2 1014.7 1012.3 1012.1 1012.5 1016.9 1021.5 1022.3 1021.6 1018.9 MAX. QFE PRESSURE IN HPA 1038.8 1034.4 1036.4 1027.2 1022.0 1019.0 1018.0 1021.0 1024.1 1027.1 1031.4 1028.0 1038.8 DAY 5 3 7 1 9 8 15 25 24 14 17 3 MIN. QFE PRESSURE IN HPA 1004.9 1013.7 1004.1 1001.2 1007.8 1006.7 1003.1 1000.5 1007.2 1011.0 1009.7 1010.0 1000.5 DAY 21 12 17 20 4 24 3 16 2 29 3 6 MEAN QNH PRESSURE IN HPA 1021.7 1023.2 1023.3 1013.5 1012.0 1009.6 1009.4 1009.8 1014.2 1018.7 1019.6 1018.9 1016.1 MAX. QNH PRESSURE IN HPA 1036.1 1031.7 1033.7 1024.5 1019.3 1016.3 1015.3 1018.3 1021.4 1024.4 1028.7 1025.3 1036.1 DAY 5 3 7 1 9 8 15 25 24 14 17 3 MIN. QNH PRESSURE IN HPA 1002.2 1011.0 1001.4 998.5 1005.1 1004.0 1000.4 997.8 1004.5 1008.3 1007.0 1007.3 997.8 DAY 21 12 17 20 4 24 3 16 2 29 3 6 MEAN QFF PRESSURE IN HPA 1021.9 1023.4 1023.5 1013.8 1012.4 1010.0 1009.8 1010.1 1014.5 1019.1 1019.9 1019.1 1016.4 MAX. QFF PRESSURE IN HPA 1036.3 1031.9 1033.8 1024.7 1019.6 1016.6 1015.7 1018.6 1021.7 1024.7 1029.0 1025.5 1036.3 DAY 5 3 7 1 9 8 15 25 24 14 17 3 MIN. QFF PRESSURE IN HPA 1002.4 1011.2 1001.7 998.8 1005.4 1004.4 1000.8 998.2 1004.9 1008.6 1007.3 1007.6 998.2 DAY 21 12 17 20 4 24 3 16 2 29 24 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1025.5 1026.9 1026.9 1016.9 1015.0 1012.6 1012.5 1012.9 1017.6 1022.4 1023.4 1022.4 1019.6 MAX. QFE PRESSURE IN HPA 1039.8 1036.4 1037.4 1029.7 1021.5 1018.4 1018.8 1021.4 1024.6 1028.9 1032.2 1027.7 1039.8 DAY 5 3 9 25 9 8 15 25 24 23 17 3 MIN. QFE PRESSURE IN HPA 1004.5 1014.6 1004.3 1001.4 1008.4 1006.1 1004.2 1002.5 1007.5 1012.1 1012.0 1011.8 1001.4 DAY 21 12 17 20 22 24 3 16 2 27 3 6 MEAN QNH PRESSURE IN HPA 1022.8 1024.2 1024.1 1014.2 1012.3 1009.9 1009.8 1010.2 1014.9 1019.7 1020.7 1019.7 1016.9 MAX. QNH PRESSURE IN HPA 1037.0 1033.7 1034.7 1027.0 1018.8 1015.7 1016.1 1018.7 1021.9 1026.2 1029.5 1025.0 1037.0 DAY 5 3 9 25 9 8 15 25 24 23 17 3 MIN. QNH PRESSURE IN HPA 1001.8 1011.9 1001.6 998.7 1005.7 1003.4 1001.5 999.8 1004.8 1009.4 1009.3 1009.1 998.7 DAY 21 12 17 20 22 24 3 16 2 27 3 6 MEAN QFF PRESSURE IN HPA 1023.0 1024.4 1024.4 1014.5 1012.7 1010.2 1010.2 1010.5 1015.2 1020.0 1021.0 1020.0 1017.2 MAX. QFF PRESSURE IN HPA 1037.3 1033.8 1034.9 1027.2 1019.1 1016.0 1016.5 1019.0 1022.2 1026.5 1029.8 1025.2 1037.3 DAY 5 3 9 25 9 8 15 25 24 23 17 3 MIN. QFF PRESSURE IN HPA 1002.1 1012.1 1001.9 999.0 1006.1 1003.8 1001.9 1000.2 1005.2 1009.7 1009.7 1009.4 999.0 DAY 21 12 17 20 22 24 3 16 2 27 3 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1024.9 1026.4 1026.5 1016.5 1014.7 1012.5 1012.5 1012.5 1017.2 1021.9 1022.9 1022.0 1019.2 MAX. QFE PRESSURE IN HPA 1038.6 1036.4 1036.9 1029.1 1021.2 1018.6 1019.2 1021.2 1023.9 1028.2 1031.2 1026.7 1038.6 DAY 5 3 9 25 9 8 15 25 23 23 17 2 MIN. QFE PRESSURE IN HPA 1002.7 1014.2 1003.4 999.4 1006.1 1006.0 1004.5 1002.3 1007.0 1011.9 1011.3 1011.3 999.4 DAY 21 12 17 20 22 24 4 16 2 27 3 5 MEAN QNH PRESSURE IN HPA 1022.1 1023.7 1023.8 1013.8 1011.9 1009.8 1009.8 1009.8 1014.5 1019.2 1020.2 1019.2 1016.5 MAX. QNH PRESSURE IN HPA 1035.9 1033.7 1034.2 1026.4 1018.5 1015.9 1016.5 1018.5 1021.2 1025.5 1028.5 1024.0 1035.9 DAY 5 3 9 25 9 8 15 25 23 23 17 2 MIN. QNH PRESSURE IN HPA 1000.0 1011.5 1000.7 996.7 1003.4 1003.3 1001.8 999.6 1004.3 1009.2 1008.6 1008.6 996.7 DAY 21 12 17 20 22 24 4 16 2 27 3 5 MEAN QFF PRESSURE IN HPA 1022.4 1023.9 1024.1 1014.1 1012.3 1010.1 1010.1 1010.2 1014.9 1019.5 1020.5 1019.5 1016.8 MAX. QFF PRESSURE IN HPA 1036.1 1033.8 1034.4 1026.6 1018.8 1016.2 1016.9 1018.8 1021.5 1025.8 1028.8 1024.3 1036.1 DAY 5 3 9 25 9 8 15 25 23 23 17 2 MIN. QFF PRESSURE IN HPA 1000.3 1011.7 1001.0 997.1 1003.8 1003.7 1002.2 1000.0 1004.7 1009.5 1008.9 1008.9 997.1 DAY 21 12 17 20 22 24 4 16 2 27 26 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1023.8 1025.4 1025.7 1015.4 1013.5 1011.6 1011.7 1011.8 1016.5 1020.9 1022.1 1021.1 1018.3 MAX. QFE PRESSURE IN HPA 1037.7 1034.4 1035.9 1028.7 1020.4 1018.6 1017.0 1021.1 1024.2 1027.0 1030.2 1027.6 1037.7 DAY 5 3 9 25 1 8 15 25 23 13 16 2 MIN. QFE PRESSURE IN HPA 1000.8 1014.1 1003.6 998.4 1001.9 1004.9 1003.6 1001.7 1005.5 1010.3 1010.4 1008.2 998.4 DAY 21 12 17 20 22 26 4 15 2 28 3 5 MEAN QNH PRESSURE IN HPA 1021.1 1022.7 1023.0 1012.7 1010.8 1008.9 1009.0 1009.1 1013.8 1018.2 1019.4 1018.3 1015.6 MAX. QNH PRESSURE IN HPA 1035.0 1031.7 1033.2 1026.0 1017.7 1015.9 1014.3 1018.4 1021.5 1024.3 1027.5 1024.9 1035.0 DAY 5 3 9 25 1 8 15 25 23 13 16 2 MIN. QNH PRESSURE IN HPA 998.1 1011.4 1000.9 995.7 999.2 1002.2 1000.9 999.0 1002.8 1007.6 1007.7 1005.5 995.7 DAY 21 12 17 20 22 26 4 15 2 28 3 5 MEAN QFF PRESSURE IN HPA 1021.3 1022.9 1023.3 1013.0 1011.1 1009.2 1009.4 1009.5 1014.2 1018.5 1019.7 1018.6 1015.9 MAX. QFF PRESSURE IN HPA 1035.2 1031.9 1033.4 1026.2 1018.0 1016.2 1014.7 1018.7 1021.8 1024.6 1027.8 1025.1 1035.2 DAY 5 3 9 25 1 8 15 25 23 13 16 2 MIN. QFF PRESSURE IN HPA 998.4 1011.6 1001.2 996.1 999.6 1002.6 1001.3 999.4 1003.2 1008.0 1008.1 1005.8 996.1 DAY 21 12 17 20 22 26 4 15 2 28 3 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1024.2 1025.7 1025.8 1015.3 1013.0 1010.8 1011.3 1011.5 1016.5 1020.8 1022.4 1021.4 1018.2 MAX. QFE PRESSURE IN HPA 1037.2 1035.6 1035.8 1028.7 1019.6 1016.8 1016.1 1021.3 1024.8 1027.0 1031.4 1029.1 1037.2 DAY 5 20 9 25 6 8 30 25 23 13 16 2 MIN. QFE PRESSURE IN HPA 1000.7 1014.9 1004.6 1003.4 1001.4 1003.6 1003.1 999.7 1005.5 1009.0 1010.4 1008.6 999.7 DAY 21 11 17 9 22 26 2 15 2 28 3 5 MEAN QNH PRESSURE IN HPA 1021.5 1022.9 1023.1 1012.6 1010.3 1008.1 1008.6 1008.8 1013.8 1018.0 1019.7 1018.7 1015.5 MAX. QNH PRESSURE IN HPA 1034.5 1032.9 1033.1 1026.0 1016.9 1014.1 1013.4 1018.6 1022.1 1024.3 1028.7 1026.4 1034.5 DAY 5 20 9 25 6 8 30 25 23 13 16 2 MIN. QNH PRESSURE IN HPA 998.0 1012.2 1001.9 1000.7 998.7 1000.9 1000.4 997.0 1002.8 1006.3 1007.7 1005.9 997.0 DAY 21 11 17 9 22 26 2 15 2 28 3 5 MEAN QFF PRESSURE IN HPA 1021.7 1023.1 1023.4 1012.9 1010.6 1008.5 1009.0 1009.2 1014.1 1018.4 1020.0 1018.9 1015.8 MAX. QFF PRESSURE IN HPA 1034.7 1033.1 1033.3 1026.2 1017.2 1014.4 1013.8 1018.9 1022.4 1024.6 1029.0 1026.6 1034.7 DAY 5 20 9 25 6 8 30 25 23 13 16 2 MIN. QFF PRESSURE IN HPA 998.3 1012.4 1002.2 1001.0 999.1 1001.3 1000.8 997.4 1003.2 1006.6 1008.1 1006.2 997.4 DAY 21 11 17 9 22 26 2 15 2 28 3 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1024.5 1026.1 1026.3 1016.2 1013.5 1011.3 1012.0 1012.2 1017.1 1021.2 1022.6 1021.6 1018.7 MAX. QFE PRESSURE IN HPA 1036.6 1036.4 1035.8 1028.7 1019.7 1018.6 1017.8 1022.0 1025.0 1027.7 1032.2 1028.7 1036.6 DAY 5 20 7 25 6 7 30 25 23 13 16 2 MIN. QFE PRESSURE IN HPA 1002.0 1013.7 1007.9 1003.4 1000.6 1004.0 1003.2 999.2 1007.3 1009.2 1010.6 1009.0 999.2 DAY 21 11 17 9 22 26 2 15 2 28 3 5 MEAN QNH PRESSURE IN HPA 1021.8 1023.4 1023.6 1013.5 1010.8 1008.6 1009.3 1009.5 1014.3 1018.5 1019.9 1018.8 1016.0 MAX. QNH PRESSURE IN HPA 1033.9 1033.7 1033.1 1026.0 1017.0 1015.9 1015.1 1019.3 1022.3 1025.0 1029.5 1026.0 1033.9 DAY 5 20 7 25 6 7 30 25 23 13 16 2 MIN. QNH PRESSURE IN HPA 999.3 1011.0 1005.2 1000.7 997.9 1001.3 1000.5 996.5 1004.6 1006.5 1007.9 1006.3 996.5 DAY 21 11 17 9 22 26 2 15 2 28 3 5 MEAN QFF PRESSURE IN HPA 1022.0 1023.6 1023.8 1013.8 1011.1 1009.0 1009.7 1009.9 1014.7 1018.9 1020.2 1019.1 1016.3 MAX. QFF PRESSURE IN HPA 1034.1 1033.9 1033.3 1026.2 1017.3 1016.2 1015.5 1019.6 1022.6 1025.3 1029.8 1026.2 1034.1 DAY 5 20 7 25 6 7 30 25 23 13 16 2 MIN. QFF PRESSURE IN HPA 999.6 1011.2 1005.5 1001.0 998.3 1001.7 1000.9 996.9 1005.0 1006.8 1008.3 1006.6 996.9 DAY 21 11 17 9 22 26 2 15 2 28 3 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1024.2 1025.8 1026.0 1015.9 1013.7 1011.4 1012.1 1012.0 1016.9 1021.1 1022.2 1021.4 1018.6 MAX. QFE PRESSURE IN HPA 1037.4 1036.4 1036.1 1028.2 1019.0 1019.0 1018.0 1021.6 1025.0 1027.5 1032.1 1028.7 1037.4 DAY 4 20 6 25 9 7 14 25 23 13 16 2 MIN. QFE PRESSURE IN HPA 1003.0 1012.7 1007.8 1004.7 1002.0 1004.0 1002.1 998.7 1007.8 1009.7 1009.8 1008.6 998.7 DAY 21 11 17 9 22 26 2 15 1 28 23 5 MEAN QNH PRESSURE IN HPA 1021.5 1023.1 1023.3 1013.2 1011.0 1008.7 1009.4 1009.3 1014.1 1018.4 1019.5 1018.6 1015.8 MAX. QNH PRESSURE IN HPA 1034.7 1033.7 1033.4 1025.5 1016.3 1016.3 1015.3 1018.9 1022.3 1024.8 1029.4 1026.0 1034.7 DAY 4 20 6 25 9 7 14 25 23 13 16 2 MIN. QNH PRESSURE IN HPA 1000.3 1010.0 1005.1 1002.0 999.3 1001.3 999.4 996.0 1005.1 1007.0 1007.1 1005.9 996.0 DAY 21 11 17 9 22 26 2 15 1 28 23 5 MEAN QFF PRESSURE IN HPA 1021.7 1023.3 1023.5 1013.5 1011.3 1009.1 1009.7 1009.7 1014.5 1018.7 1019.8 1018.9 1016.2 MAX. QFF PRESSURE IN HPA 1034.9 1033.9 1033.6 1025.7 1016.6 1016.6 1015.7 1019.2 1022.6 1025.1 1029.7 1026.3 1034.9 DAY 4 20 7 25 14 7 14 25 23 13 16 2 MIN. QFF PRESSURE IN HPA 1000.6 1010.2 1005.4 1002.3 999.7 1001.7 999.8 996.4 1005.5 1007.4 1007.4 1006.2 996.4 DAY 21 11 17 9 22 26 2 15 1 28 23 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.2 7.1 8.8 14.1 19.5 23.9 26.0 24.3 22.0 16.9 10.9 7.3 15.7 MINIMUN AIR TEMPERATURE (C) 3.4 3.6 5.4 9.4 16.0 19.9 21.1 20.3 19.0 14.1 7.9 3.4 12.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 10 20 14 4 0 0 0 49 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 3 0 1 0 0 0 0 0 0 0 0 4 8 TEMPERATURE RECORDS LOWEST(C) 0.0 1.0 0.0 4.0 12.0 16.0 19.0 17.0 16.0 9.0 1.0 -1.0 -1.0 DAY 13 12 9 3 2 4 15 18 24 26 15 26 MAXIMUM AIR TEMPERATURE (C) 12.0 10.8 12.9 18.5 23.2 27.5 30.4 28.5 25.5 20.9 15.3 12.0 19.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 6 27 14 2 0 0 0 50 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 19.0 23.0 27.0 30.0 31.0 34.0 32.0 30.0 26.0 23.0 16.0 34.0 DAY 10 10 22 30 31 30 25 7 2 8 22 10 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 7.2 7.5 9.1 7.2 7.6 9.3 8.2 6.5 6.8 7.4 8.6 7.8 MEAN DAILY TEMP. (MDT) (C) 7.7 7.2 9.1 14.0 19.6 23.7 25.7 24.4 22.3 17.5 11.6 7.7 15.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 16.0 81.5 146.5 108.5 48.5 0.0 0.0 0.0 401.0 HEATING DEG. DAYS(BASE 18 0C) 318.5 303.0 275.5 123.5 11.5 0.0 0.0 0.0 0.0 39.0 192.0 318.5 1581.5 DEWPOINT (MEAN C) 3.9 3.8 5.7 11.0 16.9 20.3 20.4 20.4 19.5 14.4 8.9 4.6 12.5 MIXING RATIO (G/KG) 5.06 4.98 5.73 8.28 12.16 15.13 15.36 15.27 14.31 10.35 7.14 5.33 9.92 VAPOUR PRESSURE (HPA) 8.25 8.11 9.30 13.36 19.45 23.99 24.28 24.21 22.82 16.68 11.62 8.69 15.90 SATURATION DEF. (HPA) 2.18 2.12 2.42 3.21 3.65 6.06 9.90 6.78 3.99 2.92 1.71 1.77 3.89 RELATIVE HUMIDITY (MEAN %) 81 81 83 83 85 81 73 80 87 86 88 84 83 RELATIVE HUMIDITY (MAX. %) 92 92 95 94 95 93 89 92 96 96 98 96 94 RELATIVE HUMIDITY (MIN. %) 65 67 67 69 74 67 56 66 76 71 75 67 68 RELATIVE HUMIDITY (MEAN% 03UTC) 86 87 90 91 89 87 82 88 91 90 94 91 89 RELATIVE HUMIDITY (MEAN% 09UTC) 66 71 72 73 79 73 62 70 80 77 78 71 73 RELATIVE HUMIDITY (MEAN% 15UTC) 83 80 79 80 81 77 66 77 86 88 90 87 81 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 44.0 63.8 108.7 26.7 47.4 109.0 0.0 106.9 213.5 253.7 380.9 90.3 1444.9 DAYS WITH PRECIPITATION >=10 1 3 3 1 1 1 0 2 7 6 8 4 37 DAYS WITH PRECIPITATION >= 5 2 5 6 2 4 4 0 3 8 6 9 7 56 DAYS WITH PRECIPITATION >= 1 7 11 11 5 10 6 0 6 11 13 13 11 104 DAYS WITH PRECIPITATION 9 12 17 8 12 6 0 8 15 17 15 12 131 GREATEST DAILY PRECIPITATION 29.0 13.0 33.0 13.0 13.0 82.0 0.0 64.0 86.0 92.0 108.0 22.0 108.0 DAY 14 19 16 23 6 14 ** 16 14 14 28 2 DAY WITH THUNDER STORM 1 0 0 0 2 0 0 0 1 2 0 0 6 DAYS WITH SNOW OR SLEET 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 1 0 0 0 0 1 0 0 1 0 1 4 WIND DIRECTION (PREVAILING) 315 315 315 45 360 360 360 360 315 270 270 270 315 PREVAILING WIND SPEED(KNOTS) 8.4 8.5 7.6 3.9 4.2 4.7 6.1 5.2 8.3 4.4 4.9 4.0 8.2 PREVAILING WIND PERCENT 8.5 10.7 16.5 21.7 14.5 13.3 19.8 16.1 12.1 8.9 7.9 8.9 9.3 CALMS PERCENT OF WIND 58.9 55.8 46.8 45.4 48.0 47.5 41.1 38.3 43.8 54.4 68.3 65.3 51.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 342 339 10 32 12 350 336 338 311 324 323 312 345 VECTOR WIND MAGNITUDE(KNOTS) 0.6 1.0 1.2 1.4 1.3 1.2 2.8 1.3 1.5 0.4 0.6 0.7 1.1 WIND STEADINESES (MEAN %) 28.6 43.5 37.5 56.0 52.0 50.0 73.7 48.1 50.0 20.0 40.0 43.8 44.0 WIND SPEED (MEAN KNOTS) 2.1 2.3 3.2 2.5 2.5 2.4 3.8 2.7 3.0 2.0 1.5 1.6 2.5 FASTEST WIND DIRECTION 310 320 320 310 310 330 330 300 40 310 290 310 320 FASTEST WIND SPEED (KNOTS) 18 20 20 18 12 16 20 12 15 14 14 18 20 DAY 2 10 24 23 6 24 17 12 5 10 4 23 DAYS WITH SKY CLEAR (0-2)/8 8 6 9 15 12 16 23 14 7 8 7 7 132 DAYS WITH P.CLOUDY (3-6)/8 12 7 9 5 8 7 8 10 6 3 4 11 90 DAYS WITH CLOUDY (7-8)/8 11 15 13 10 11 7 0 7 17 20 19 13 143 DAYS WITH VISIBILITY =< 2 KM 1 0 2 1 0 1 0 2 5 2 8 2 24 DURATION OF SUNSHINE HOURS 119.3 99.1 147.4 199.2 194.3 241.2 306.9 201.6 116.0 104.1 83.4 96.8 1909.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1023.9 1021.0 1020.0 1018.4 1014.5 1010.8 1008.2 1011.3 1015.9 1020.4 1025.0 1023.3 1017.7 MAX. QFE PRESSURE IN HPA 1044.5 1034.8 1032.0 1030.9 1021.6 1020.5 1016.4 1025.5 1028.2 1032.3 1043.6 1036.9 1044.5 DAY-HOUR 14- 6 19- 6 15-21 3- 9 3- 6 17- 6 14- 3 17-18 18- 6 23- 9 14- 6 4- 6 MIN. QFE PRESSURE IN HPA 1010.8 1002.0 999.8 1006.2 1008.3 1000.8 999.9 1000.5 1004.6 1005.4 1013.4 1004.4 999.8 DAY-HOUR 8-21 10-15 27-12 30-15 1- 0 23-15 1-15 10-15 9-12 9-12 26- 0 23- 0 MEAN QNH PRESSURE IN HPA 1021.2 1018.3 1017.3 1015.7 1011.7 1008.0 1005.5 1008.6 1013.2 1017.7 1022.2 1020.6 1015.0 MAX. QNH PRESSURE IN HPA 1041.7 1032.1 1029.3 1028.2 1018.9 1017.8 1013.7 1022.8 1025.5 1029.6 1040.8 1034.2 1041.7 DAY-HOUR 14- 6 19- 6 15-21 3- 9 3- 6 17- 6 14- 3 17-18 18- 6 23- 9 14- 6 4- 6 MIN. QNH PRESSURE IN HPA 1008.1 999.3 997.1 1003.5 1005.6 998.1 997.2 997.8 1001.9 1002.7 1010.7 1001.7 997.1 DAY-HOUR 8-21 10-15 27-12 30-15 1- 0 23-15 1-15 10-15 9-12 9-12 26- 0 23- 0 MEAN QFF PRESSURE IN HPA 1021.4 1018.5 1017.5 1016.0 1012.1 1008.4 1006.0 1009.0 1013.6 1018.0 1022.5 1020.8 1015.3 MAX. QFF PRESSURE IN HPA 1041.9 1032.3 1029.5 1028.4 1019.2 1018.2 1014.1 1023.1 1025.8 1029.9 1041.1 1034.4 1041.9 DAY-HOUR 14- 6 19- 6 15-21 3- 9 3- 6 17- 6 14- 6 17-18 18- 6 23- 9 14- 6 4- 6 MIN. QFF PRESSURE IN HPA 1008.3 999.6 997.4 1003.9 1006.0 998.5 997.6 998.2 1002.3 1003.1 1011.0 1002.0 997.4 DAY-HOUR 9- 0 10-15 27-12 30-15 1- 0 23-15 1-15 10-15 9-15 9-12 26- 3 23- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1023.5 1020.9 1019.8 1018.1 1013.8 1010.6 1008.1 1011.0 1015.5 1020.1 1024.8 1022.7 1017.4 MAX. QFE PRESSURE IN HPA 1041.3 1032.1 1032.0 1028.6 1020.2 1019.5 1016.0 1023.4 1026.2 1029.7 1041.7 1035.9 1041.7 DAY 14 19 16 2 3 17 14 18 19 18 14 4 MIN. QFE PRESSURE IN HPA 1010.8 1005.4 1000.2 1007.2 1008.3 1002.4 1002.0 1002.8 1006.4 1008.6 1013.4 1004.4 1000.2 DAY 9 10 27 27 1 24 5 15 7 9 26 23 MEAN QNH PRESSURE IN HPA 1020.8 1018.2 1017.1 1015.4 1011.1 1007.9 1005.4 1008.3 1012.8 1017.4 1022.0 1020.0 1014.7 MAX. QNH PRESSURE IN HPA 1038.5 1029.4 1029.3 1025.9 1017.5 1016.8 1013.3 1020.7 1023.5 1027.0 1038.9 1033.2 1038.9 DAY 14 19 16 2 3 17 14 18 19 18 14 4 MIN. QNH PRESSURE IN HPA 1008.1 1002.7 997.5 1004.5 1005.6 999.7 999.3 1000.1 1003.7 1005.9 1010.7 1001.7 997.5 DAY 9 10 27 27 1 24 5 15 7 9 26 23 MEAN QFF PRESSURE IN HPA 1021.1 1018.4 1017.3 1015.7 1011.5 1008.3 1005.8 1008.7 1013.2 1017.7 1022.3 1020.2 1015.0 MAX. QFF PRESSURE IN HPA 1038.8 1029.6 1029.5 1026.1 1017.8 1017.2 1013.7 1021.0 1023.8 1027.3 1039.2 1033.4 1039.2 DAY 14 19 16 2 3 17 14 18 19 18 14 4 MIN. QFF PRESSURE IN HPA 1008.3 1003.0 997.8 1004.8 1006.0 1000.1 999.7 1000.5 1004.1 1006.3 1011.0 1002.0 997.8 DAY 9 10 27 27 1 24 5 15 7 9 26 23 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1023.6 1021.4 1020.2 1018.5 1014.5 1011.0 1008.8 1011.8 1016.1 1020.4 1025.0 1023.0 1017.9 MAX. QFE PRESSURE IN HPA 1043.0 1034.0 1031.0 1029.3 1020.8 1020.1 1016.4 1023.4 1027.2 1030.5 1042.4 1036.0 1043.0 DAY 14 19 16 2 3 17 14 18 18 17 14 4 MIN. QFE PRESSURE IN HPA 1011.0 1005.1 1001.0 1007.2 1009.1 1003.4 1001.6 1003.5 1006.7 1008.6 1013.4 1004.7 1001.0 DAY 9 10 27 27 1 24 5 15 10 4 26 23 MEAN QNH PRESSURE IN HPA 1020.9 1018.6 1017.5 1015.8 1011.8 1008.3 1006.1 1009.1 1013.4 1017.7 1022.3 1020.3 1015.1 MAX. QNH PRESSURE IN HPA 1040.2 1031.3 1028.3 1026.6 1018.1 1017.4 1013.7 1020.7 1024.5 1027.8 1039.6 1033.3 1040.2 DAY 14 19 16 2 3 17 14 18 18 17 14 4 MIN. QNH PRESSURE IN HPA 1008.3 1002.4 998.3 1004.5 1006.4 1000.7 998.9 1000.8 1004.0 1005.9 1010.7 1002.0 998.3 DAY 9 10 27 27 1 24 5 15 10 4 26 23 MEAN QFF PRESSURE IN HPA 1021.1 1018.9 1017.7 1016.1 1012.1 1008.7 1006.5 1009.5 1013.7 1018.0 1022.6 1020.5 1015.5 MAX. QFF PRESSURE IN HPA 1040.4 1031.5 1028.5 1026.8 1018.4 1017.8 1014.1 1021.0 1024.8 1028.1 1039.9 1033.5 1040.4 DAY 14 19 16 2 3 17 14 18 18 17 14 4 MIN. QFF PRESSURE IN HPA 1008.5 1002.7 998.6 1004.8 1006.8 1001.1 999.3 1001.2 1004.4 1006.2 1011.0 1002.3 998.6 DAY 9 10 27 27 1 24 5 15 10 9 26 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RAMSAR (40732) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 54 N LONGITUDE 50 40 E DATA PROCESSING CENTER ELEVATION -20.0 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1025.0 1022.3 1020.9 1019.5 1015.3 1011.6 1009.1 1012.3 1016.7 1021.3 1025.9 1024.1 1018.7 MAX. QFE PRESSURE IN HPA 1044.5 1034.8 1031.9 1030.7 1021.6 1020.5 1016.4 1023.7 1028.2 1032.1 1043.6 1036.9 1044.5 DAY 14 19 8 3 3 17 14 18 18 23 14 4 MIN. QFE PRESSURE IN HPA 1013.9 1004.3 1000.6 1007.7 1009.8 1004.0 1001.5 1004.3 1006.9 1008.5 1014.9 1005.9 1000.6 DAY 9 10 27 30 1 24 5 15 9 9 26 23 MEAN QNH PRESSURE IN HPA 1022.2 1019.6 1018.2 1016.8 1012.6 1008.9 1006.4 1009.6 1014.0 1018.5 1023.1 1021.4 1015.9 MAX. QNH PRESSURE IN HPA 1041.7 1032.1 1029.2 1028.0 1018.9 1017.8 1013.7 1021.0 1025.5 1029.4 1040.8 1034.2 1041.7 DAY 14 19 8 3 3 17 14 18 18 23 14 4 MIN. QNH PRESSURE IN HPA 1011.2 1001.6 997.9 1005.0 1007.1 1001.3 998.8 1001.6 1004.2 1005.8 1012.2 1003.2 997.9 DAY 9 10 27 30 1 24 5 15 9 9 26 23 MEAN QFF PRESSURE IN HPA 1022.5 1019.8 1018.5 1017.1 1012.9 1009.3 1006.8 1010.0 1014.4 1018.9 1023.4 1021.6 1016.3 MAX. QFF PRESSURE IN HPA 1041.9 1032.3 1029.4 1028.2 1019.2 1018.2 1014.1 1021.3 1025.8 1029.7 1041.1 1034.4 1041.9 DAY 14 19 8 3 3 17 14 18 18 23 14 4 MIN. QFF PRESSURE IN HPA 1011.4 1001.9 998.2 1005.4 1007.5 1001.7 999.2 1002.0 1004.6 1006.2 1012.5 1003.5 998.2 DAY 9 10 27 30 1 24 5 15 9 9 26 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1024.2 1021.8 1020.6 1019.2 1015.2 1011.4 1008.8 1011.9 1016.4 1020.7 1025.1 1023.7 1018.2 MAX. QFE PRESSURE IN HPA 1043.1 1032.9 1031.5 1030.9 1020.9 1019.7 1016.2 1022.9 1028.0 1032.3 1042.5 1036.0 1043.1 DAY 14 17 7 3 3 17 14 17 18 23 14 4 MIN. QFE PRESSURE IN HPA 1012.3 1004.5 1000.0 1007.5 1010.3 1004.2 1001.3 1004.2 1005.6 1006.7 1014.3 1008.2 1000.0 DAY 9 10 27 30 1 24 5 10 9 9 26 27 MEAN QNH PRESSURE IN HPA 1021.5 1019.0 1017.9 1016.5 1012.5 1008.7 1006.1 1009.2 1013.6 1018.0 1022.4 1021.0 1015.5 MAX. QNH PRESSURE IN HPA 1040.3 1030.2 1028.8 1028.2 1018.2 1017.0 1013.5 1020.2 1025.3 1029.6 1039.7 1033.3 1040.3 DAY 14 17 7 3 3 17 14 17 18 23 14 4 MIN. QNH PRESSURE IN HPA 1009.6 1001.8 997.3 1004.8 1007.6 1001.5 998.6 1001.5 1002.9 1004.0 1011.6 1005.5 997.3 DAY 9 10 27 30 1 24 5 10 9 9 26 27 MEAN QFF PRESSURE IN HPA 1021.7 1019.3 1018.1 1016.8 1012.9 1009.1 1006.5 1009.6 1014.0 1018.3 1022.6 1021.2 1015.8 MAX. QFF PRESSURE IN HPA 1040.5 1030.4 1029.0 1028.4 1018.5 1017.4 1013.9 1020.5 1025.6 1029.9 1040.0 1033.5 1040.5 DAY 14 17 7 3 3 17 14 17 18 23 14 4 MIN. QFF PRESSURE IN HPA 1009.9 1002.1 997.7 1005.2 1008.0 1001.9 999.0 1001.9 1003.3 1004.4 1011.9 1005.8 997.7 DAY 9 10 27 30 1 24 5 10 9 9 26 27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1023.4 1020.3 1019.3 1018.2 1014.4 1010.6 1007.8 1010.9 1015.4 1019.8 1024.4 1022.9 1017.3 MAX. QFE PRESSURE IN HPA 1042.2 1031.2 1030.7 1029.8 1019.4 1019.0 1015.0 1022.6 1027.8 1031.5 1041.4 1035.6 1042.2 DAY 14 24 7 3 3 17 13 17 18 23 14 4 MIN. QFE PRESSURE IN HPA 1012.2 1002.4 999.8 1007.4 1010.2 1002.6 1000.7 1002.0 1004.6 1005.4 1013.6 1007.1 999.8 DAY 8 10 27 30 16 23 1 10 9 9 26 27 MEAN QNH PRESSURE IN HPA 1020.6 1017.5 1016.5 1015.5 1011.6 1007.9 1005.1 1008.2 1012.7 1017.1 1021.6 1020.2 1014.6 MAX. QNH PRESSURE IN HPA 1039.4 1028.5 1028.0 1027.1 1016.7 1016.3 1012.3 1019.9 1025.1 1028.8 1038.6 1032.9 1039.4 DAY 14 24 7 3 3 17 13 17 18 23 14 4 MIN. QNH PRESSURE IN HPA 1009.5 999.7 997.1 1004.7 1007.5 999.9 998.0 999.3 1001.9 1002.7 1010.9 1004.4 997.1 DAY 8 10 27 30 16 23 1 10 9 9 26 27 MEAN QFF PRESSURE IN HPA 1020.9 1017.8 1016.8 1015.8 1012.0 1008.3 1005.5 1008.6 1013.1 1017.4 1021.9 1020.5 1014.9 MAX. QFF PRESSURE IN HPA 1039.6 1028.7 1028.2 1027.