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. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.8 ****** 1017.8 1018.1 1016.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1017.2 ****** 1026.7 1032.7 1040.1 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 17- 9 **-** 11- 6 12- 3 2- 3 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.6 ****** 1010.7 1004.4 1005.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 1-12 **-** 30- 3 24- 9 18- 3 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1005.1 ****** 1015.1 1015.3 1014.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1014.5 ****** 1024.0 1030.0 1037.3 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 17- 9 **-** 11- 6 12- 3 2- 3 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.9 ****** 1008.0 1001.7 1002.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 1-12 **-** 30- 3 24- 9 18- 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 ****** ****** ****** ****** ****** ****** ****** 1008.0 1014.1 1017.9 1017.7 1017.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1016.5 1023.5 1026.1 1032.7 1040.1 ****** DAY ** ** ** ** ** ** ** 18 30 11 12 2 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.8 1007.6 1010.7 1006.3 1005.2 ****** DAY ** ** ** ** ** ** ** 2 1 30 24 18 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1005.3 1011.4 1015.2 1015.0 1014.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.8 1020.8 1023.4 1030.0 1037.3 ****** DAY ** ** ** ** ** ** ** 18 30 11 12 2 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.1 1004.9 1008.0 1003.6 1002.5 ****** DAY ** ** ** ** ** ** ** 2 1 30 24 18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.1 1015.4 1014.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.7 1030.2 1037.6 ****** DAY ** ** ** ** ** ** ** ** ** 11 12 2 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.3 1003.9 1002.8 ****** DAY ** ** ** ** ** ** ** ** ** 30 24 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 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.4 1014.5 1018.6 1018.9 1018.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1016.7 1024.1 1026.7 1032.7 1040.1 ****** DAY ** ** ** ** ** ** ** 17 30 11 12 2 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.2 1007.7 1012.1 1007.0 1006.6 ****** DAY ** ** ** ** ** ** ** 1 1 7 24 18 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1005.7 1011.8 1015.9 1016.2 1015.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1014.0 1021.4 1024.0 1030.0 1037.3 ****** DAY ** ** ** ** ** ** ** 17 30 11 12 2 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.5 1005.0 1009.4 1004.3 1003.9 ****** DAY ** ** ** ** ** ** ** 1 1 7 24 18 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 ****** ****** ****** ****** ****** ****** ****** 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. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.1 1005.2 1009.4 1001.7 1003.2 ****** DAY ** ** ** ** ** ** ** 1 8 6 24 18 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 ****** ****** ****** ****** ****** ****** ****** 1006.7 ****** 1016.9 1017.7 1015.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1016.6 ****** 1025.3 1031.5 1034.8 ****** DAY ** ** ** ** ** ** ** 17 ** 11 11 1 MIN. 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