STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** ***** 32.6 30.1 28.8 25.9 23.1 ***** MINIMUN AIR TEMPERATURE (C) 15.3 15.1 18.5 22.0 25.2 27.6 29.2 29.5 26.6 23.8 20.0 17.9 22.6 DAYS WITH MINIMUM TEMP. >=21 0 0 6 23 31 30 31 31 30 31 10 3 226 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) 12.0 10.0 13.0 20.0 21.0 24.0 24.0 26.0 24.0 21.0 17.0 11.0 10.0 DAY 1 7 5 5 1 5 6 17 21 19 20 31 MAXIMUM AIR TEMPERATURE (C) 23.9 21.8 26.9 30.5 33.4 34.7 36.0 35.5 32.1 31.5 28.9 25.5 30.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 18 31 30 31 31 30 29 10 0 211 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.0 24.0 31.0 36.0 36.0 42.0 41.0 39.0 36.0 35.0 31.0 28.0 42.0 DAY 5 16 18 20 16 12 15 7 27 4 2 3 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 6.7 8.4 8.5 8.2 7.1 6.8 6.0 5.5 7.7 8.9 7.6 7.5 MEAN DAILY TEMP. (MDT) (C) 19.6 18.5 22.7 26.2 29.3 31.1 32.6 32.5 29.3 27.6 24.4 21.7 26.3 COOLING DEG. DAYS(BASE 21 0C) 2.0 0.0 60.0 156.5 257.0 304.0 359.0 357.0 250.5 206.0 103.0 32.5 2087.5 HEATING DEG. DAYS(BASE 18 0C) 2.5 18.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 21.5 DEWPOINT (MEAN C) ***** ***** ***** ***** ***** ***** ***** 25.5 23.8 20.9 17.7 14.3 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** ****** ****** ****** 21.26 18.94 15.99 13.16 10.62 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** ****** ****** ****** 32.99 29.69 25.31 21.01 17.03 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** ****** ****** ****** 16.55 13.17 14.73 12.74 11.58 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** 68 70 64 63 60 *** RELATIVE HUMIDITY (MAX. %) 71 72 67 68 70 74 75 77 80 76 76 73 73 RELATIVE HUMIDITY (MIN. %) 55 59 52 53 54 60 59 57 61 53 50 49 55 RELATIVE HUMIDITY (MEAN% 03UTC) 70 69 64 65 65 72 72 74 78 68 70 69 70 RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** 66 65 61 56 55 *** RELATIVE HUMIDITY (MEAN% 15UTC) 56 61 55 56 59 61 63 72 73 69 70 63 63 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 13.0 104.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 201.0 318.0 DAYS WITH PRECIPITATION >=10 1 2 0 0 0 0 0 0 0 0 0 2 5 DAYS WITH PRECIPITATION >= 5 1 3 0 0 0 0 0 0 0 0 0 3 7 DAYS WITH PRECIPITATION >= 1 2 4 0 0 0 0 0 0 0 0 0 3 9 DAYS WITH PRECIPITATION 2 4 0 0 0 0 0 0 0 0 0 3 9 GREATEST DAILY PRECIPITATION 11.0 49.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 180.0 180.0 DAY 17 2 ** ** ** ** ** ** ** ** ** 9 DAY WITH THUNDER STORM 0 1 0 2 0 0 0 1 0 0 1 2 7 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 7 2 12 6 7 6 3 8 2 13 1 2 69 WIND DIRECTION (PREVAILING) *** *** *** *** *** *** *** 270 180 270 270 270 *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** **** **** **** 6.3 5.8 5.7 3.9 2.2 **** PREVAILING WIND PERCENT ***** ***** ***** ***** ***** ***** ***** 32.8 46.3 37.7 39.3 23.2 ***** CALMS PERCENT OF WIND ***** ***** ***** ***** ***** ***** ***** 7.2 3.4 13.6 14.0 9.0 ***** NO. OF WIND OBSERVATION 62 58 62 60 62 60 62 125 149 154 150 155 1159 VECTOR WIND DIRECTION (MEAN) *** *** *** *** *** *** *** 244 160 228 249 154 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** **** **** **** 2.0 3.4 1.7 1.5 0.9 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** ***** ***** ***** 38.5 64.2 42.5 62.5 30.0 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** **** **** **** 5.2 5.3 4.0 2.4 3.0 **** FASTEST WIND DIRECTION *** *** *** *** *** *** *** 310 180 90 270 130 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** *** *** *** 18 18 18 10 20 *** DAY ** ** ** ** ** ** ** 12 17 12 3 8 DAYS WITH SKY CLEAR (0-2)/8 26 18 24 21 31 29 27 31 26 31 27 25 316 DAYS WITH P.CLOUDY (3-6)/8 4 5 5 8 0 1 2 0 4 0 3 6 38 DAYS WITH CLOUDY (7-8)/8 1 6 2 1 0 0 0 0 0 0 0 0 10 DAYS WITH VISIBILITY =< 2 KM 19 19 24 28 31 30 9 8 1 3 0 0 172 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 ****** ****** ****** ****** ****** ****** ****** 998.7 1005.3 1011.2 1016.1 1015.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.2 1011.0 1018.1 1021.4 1022.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 13- 3 21- 6 21- 6 16- 6 17- 6 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.8 1000.1 1002.4 1011.1 1010.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 7-12 5-12 3-15 1-12 28-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.0 1005.6 1011.5 1016.4 1016.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.5 1011.3 1018.4 1021.7 1022.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 13- 3 21- 6 21- 6 16- 6 17- 6 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.1 1000.4 1002.7 1011.4 1010.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 7-12 5-12 3-15 1-12 28-12 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 1016.5 1016.8 1012.8 1010.3 1006.2 1000.7 998.1 999.0 1005.7 1011.8 1016.7 1016.2 1009.2 MAX. QFE PRESSURE IN HPA 1021.0 1023.3 1018.2 1014.4 1010.8 1007.1 1002.6 1008.2 1009.8 1018.1 1020.4 1020.9 1023.3 DAY 20 7 28 4 2 1 26 13 21 23 29 17 MIN. QFE PRESSURE IN HPA 1012.5 1008.5 1003.0 1004.7 1001.0 996.4 993.3 995.7 1003.2 1004.3 1012.8 1010.9 993.3 DAY 29 15 19 24 30 29 10 11 7 3 3 9 MEAN QNH PRESSURE IN HPA 1016.8 1017.1 1013.1 1010.6 1006.5 1001.0 998.4 999.3 1006.1 1012.2 1017.1 1016.6 1009.6 MAX. QNH PRESSURE IN HPA 1021.3 1023.6 1018.5 1014.7 1011.1 1007.4 1002.9 1008.5 1010.1 1018.4 1020.7 1021.2 1023.6 DAY 20 7 28 4 2 1 26 13 21 23 29 17 MIN. QNH PRESSURE IN HPA 1012.8 1008.8 1003.3 1005.0 1001.3 996.7 993.6 996.0 1003.5 1004.6 1013.1 1011.2 993.6 DAY 29 15 19 24 30 29 10 11 7 3 3 9 MEAN QFF PRESSURE IN HPA 1017.0 1017.4 1013.4 1010.9 1006.8 1001.3 998.6 1000.6 1006.4 1012.4 1017.3 1016.8 1009.9 MAX. QFF PRESSURE IN HPA 1021.6 1023.9 1018.8 1015.0 1011.4 1007.7 1003.2 1008.8 1010.4 1018.7 1021.0 1021.5 1023.9 DAY 20 7 28 4 2 1 26 13 21 23 29 17 MIN. QFF PRESSURE IN HPA 1013.1 1009.1 1003.6 1005.3 1001.6 997.0 993.9 996.5 1003.8 1004.9 1013.4 1011.5 993.9 DAY 29 15 19 24 30 29 10 12 7 3 3 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 ****** ****** ****** ****** ****** ****** ****** 1000.9 1006.9 1012.8 1017.7 1017.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.7 1011.0 1018.1 1021.4 1022.4 ****** DAY ** ** ** ** ** ** ** 28 21 21 16 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.2 1004.1 1005.6 1013.7 1013.0 ****** DAY ** ** ** ** ** ** ** 11 7 3 1 30 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1001.2 1007.3 1013.1 1018.0 1018.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.0 1011.3 1018.4 1021.7 1022.7 ****** DAY ** ** ** ** ** ** ** 28 21 21 16 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.5 1004.4 1005.9 1014.0 1013.3 ****** DAY ** ** ** ** ** ** ** 11 7 3 1 30 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 ****** ****** ****** ****** ****** ****** ****** 998.9 1005.6 1011.2 1015.7 1015.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.0 1009.7 1016.0 1019.6 1020.1 ****** DAY ** ** ** ** ** ** ** 28 21 21 15 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.8 1002.5 1004.2 1011.9 1010.5 ****** DAY ** ** ** ** ** ** ** 11 7 3 1 9 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.2 1005.9 1011.5 1016.0 1015.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1006.3 1010.0 1016.3 1019.9 1020.4 ****** DAY ** ** ** ** ** ** ** 28 21 21 15 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 995.1 1002.8 1004.5 1012.2 1010.8 ****** DAY ** ** ** ** ** ** ** 11 7 3 1 9 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 ****** ****** ****** ****** ****** ****** ****** 997.1 1004.1 1009.9 1014.8 1014.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.2 1009.8 1015.0 1018.9 1019.0 ****** DAY ** ** ** ** ** ** ** 28 16 21 15 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.8 1000.1 1002.7 1011.1 1010.2 ****** DAY ** ** ** ** ** ** ** 7 5 3 1 28 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.4 1004.4 1010.2 1015.1 1015.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.5 1010.1 1015.3 1019.2 1019.3 ****** DAY ** ** ** ** ** ** ** 28 16 21 15 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.1 1000.4 1003.0 1011.4 1010.5 ****** DAY ** ** ** ** ** ** ** 7 5 3 1 28 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1014.4 1015.7 1010.8 1008.8 1004.7 998.4 996.4 998.3 1004.1 1010.2 1015.7 1015.6 1007.8 MAX. QFE PRESSURE IN HPA 1018.1 1021.2 1016.8 1012.9 1009.4 1004.8 1000.5 1004.1 1008.8 1015.1 1020.2 1020.8 1021.2 DAY 20 7 2 4 1 1 20 28 20 21 15 17 MIN. QFE PRESSURE IN HPA 1009.8 1011.3 1001.6 1002.7 999.9 994.8 990.2 994.3 1000.5 1002.4 1011.6 1010.8 990.2 DAY 28 2 19 24 30 22 3 11 7 3 1 28 MEAN QNH PRESSURE IN HPA 1014.8 1016.0 1011.2 1009.1 1005.0 998.8 996.7 998.6 1004.5 1010.5 1016.0 1016.0 1008.1 MAX. QNH PRESSURE IN HPA 1018.4 1021.5 1017.1 1013.2 1009.7 1005.1 1000.8 1004.4 1009.1 1015.4 1020.5 1021.1 1021.5 DAY 20 7 2 4 1 1 20 28 20 21 15 17 MIN. QNH PRESSURE IN HPA 1010.1 1011.6 1001.9 1003.0 1000.2 995.1 990.5 994.6 1000.8 1002.7 1011.9 1011.1 990.5 DAY 28 2 19 24 30 22 3 11 7 3 1 28 MEAN QFF PRESSURE IN HPA 1015.0 1016.3 1011.4 1009.4 1005.3 999.0 996.9 998.9 1004.8 1010.8 1016.3 1016.2 1008.4 MAX. QFF PRESSURE IN HPA 1018.7 1021.8 1017.4 1013.5 1010.0 1005.4 1001.1 1004.7 1009.4 1015.7 1020.8 1021.4 1021.8 DAY 20 7 4 4 1 1 20 28 20 21 15 17 MIN. QFF PRESSURE IN HPA 1010.4 1011.9 1002.2 1003.3 1000.5 995.4 990.8 994.9 1001.1 1003.0 1012.2 1011.4 990.8 DAY 28 12 19 24 30 22 3 11 7 3 1 28 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 JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.3 21.0 25.6 27.9 30.9 33.3 32.7 32.4 31.9 29.7 25.8 23.2 27.9 MINIMUN AIR TEMPERATURE (C) 16.1 14.9 20.0 22.9 25.6 28.0 28.8 28.8 26.0 23.7 19.1 16.4 22.5 DAYS WITH MINIMUM TEMP. >=21 0 1 13 29 31 29 31 31 30 31 12 0 238 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) 11.0 11.0 13.0 20.0 22.0 18.0 24.0 25.0 22.0 21.0 14.0 13.0 11.0 DAY 13 5 5 23 3 15 27 5 18 16 25 25 MAXIMUM AIR TEMPERATURE (C) 22.5 23.5 28.0 30.6 33.3 35.9 34.4 34.4 34.8 32.3 28.6 26.0 30.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 4 22 29 30 31 31 30 31 10 0 218 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.0 27.0 31.0 36.0 40.0 40.0 43.0 40.0 40.0 39.0 32.0 28.0 43.0 DAY 18 11 14 4 19 7 15 2 8 23 3 5 DIF. BETWEEN (MAX.-MIN.) (C) 6.4 8.6 8.0 7.7 7.7 7.9 5.6 5.6 8.8 8.6 9.5 9.6 7.9 MEAN DAILY TEMP. (MDT) (C) 19.3 19.2 24.0 26.8 29.5 31.9 31.6 31.6 30.4 28.0 23.9 21.2 26.4 COOLING DEG. DAYS(BASE 21 0C) 4.0 8.5 95.0 173.0 262.5 328.0 329.5 328.0 282.5 217.0 87.0 16.0 2131.0 HEATING DEG. DAYS(BASE 18 0C) 10.5 6.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17.0 DEWPOINT (MEAN C) 12.6 10.8 18.5 18.5 22.6 23.8 26.5 25.7 21.0 23.4 13.6 14.5 19.3 MIXING RATIO (G/KG) 9.58 8.57 13.70 13.67 17.95 19.50 22.50 21.41 16.92 18.34 10.38 10.42 15.24 VAPOUR PRESSURE (HPA) 15.38 13.78 21.76 21.68 28.13 30.33 34.79 33.24 26.53 28.92 16.60 16.75 23.99 SATURATION DEF. (HPA) 8.69 11.39 11.28 16.19 16.93 21.25 15.00 15.78 21.28 12.92 17.20 12.06 15.00 RELATIVE HUMIDITY (MEAN %) 64 55 67 59 64 61 71 69 57 70 49 59 62 RELATIVE HUMIDITY (MAX. %) 77 69 80 72 77 72 81 78 71 83 63 72 75 RELATIVE HUMIDITY (MIN. %) 53 42 55 48 51 48 63 60 45 60 36 47 51 RELATIVE HUMIDITY (MEAN% 03UTC) 73 64 75 67 69 65 78 76 60 81 56 69 69 RELATIVE HUMIDITY (MEAN% 09UTC) 57 47 61 53 57 58 66 64 55 63 44 52 56 RELATIVE HUMIDITY (MEAN% 15UTC) 67 56 72 61 72 63 76 71 64 70 56 65 66 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 192.0 17.5 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 209.7 DAYS WITH PRECIPITATION >=10 6 0 0 0 0 0 0 0 0 0 0 0 6 DAYS WITH PRECIPITATION >= 5 8 2 0 0 0 0 0 0 0 0 0 0 10 DAYS WITH PRECIPITATION >= 1 8 3 0 0 0 0 0 0 0 0 0 0 11 DAYS WITH PRECIPITATION 8 3 0 0 0 0 1 0 0 0 0 0 12 GREATEST DAILY PRECIPITATION 43.0 9.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 43.0 DAY 9 22 ** ** ** ** 26 ** ** ** ** ** DAY WITH THUNDER STORM 1 2 2 1 3 0 0 1 0 1 0 0 11 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 8 4 7 7 6 9 5 1 5 6 5 0 63 WIND DIRECTION (PREVAILING) 90 270 270 270 270 180 180 180 270 180 270 270 270 PREVAILING WIND SPEED(KNOTS) 4.7 4.1 5.3 6.1 4.5 5.1 4.8 4.1 3.9 3.3 4.1 3.6 4.7 PREVAILING WIND PERCENT 42.6 37.1 34.8 48.0 39.4 40.0 62.6 54.8 38.0 31.0 48.0 30.3 31.7 CALMS PERCENT OF WIND 9.7 9.3 11.0 7.3 9.0 5.3 0.6 0.6 8.0 15.5 8.7 9.7 7.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 65 277 232 281 213 213 156 164 223 199 257 244 219 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.6 1.0 3.6 1.7 1.9 3.4 2.4 0.8 1.6 1.7 0.8 1.2 WIND STEADINESES (MEAN %) 11.1 61.5 23.3 73.5 44.7 40.4 68.0 58.5 25.0 44.4 58.6 38.1 31.6 WIND SPEED (MEAN KNOTS) 4.5 2.6 4.3 4.9 3.8 4.7 5.0 4.1 3.2 3.6 2.9 2.1 3.8 FASTEST WIND DIRECTION 310 270 270 310 110 90 160 90 270 270 290 290 310 FASTEST WIND SPEED (KNOTS) 24 16 20 32 20 20 18 14 12 20 25 14 32 DAY 31 26 18 8 21 15 23 23 10 10 4 19 DAYS WITH SKY CLEAR (0-2)/8 18 24 26 17 30 30 24 27 28 28 26 27 305 DAYS WITH P.CLOUDY (3-6)/8 6 3 5 9 1 0 4 4 0 3 4 4 43 DAYS WITH CLOUDY (7-8)/8 7 1 0 4 0 0 3 0 0 0 0 0 15 DAYS WITH VISIBILITY =< 2 KM 9 4 6 2 2 3 1 0 4 2 1 0 34 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1015.8 1015.9 1011.2 1008.8 1004.5 999.2 996.8 999.9 1004.7 1010.4 1014.6 1016.8 1008.2 MAX. QFE PRESSURE IN HPA 1023.9 1023.2 1017.6 1013.3 1011.9 1006.7 1002.5 1008.7 1011.9 1016.2 1022.6 1022.3 1023.9 DAY-HOUR 13- 6 4- 6 1- 6 7- 3 4- 6 3- 6 27- 6 24- 6 29- 6 31- 6 24- 6 17- 6 MIN. QFE PRESSURE IN HPA 1010.0 1008.9 1005.1 1004.5 996.6 994.0 991.6 991.4 998.2 1004.0 1009.7 1011.0 991.4 DAY-HOUR 25-12 15-12 24- 3 17-12 9- 6 22-12 21-15 7-12 7-12 29-15 3-12 7-12 MEAN QNH PRESSURE IN HPA 1016.1 1016.2 1011.5 1009.1 1004.8 999.6 997.1 1000.3 1005.0 1010.7 1015.0 1017.1 1008.5 MAX. QNH PRESSURE IN HPA 1024.2 1023.5 1017.9 1013.6 1012.2 1007.0 1002.8 1009.0 1012.2 1016.5 1022.9 1022.6 1024.2 DAY-HOUR 13- 6 4- 6 1- 6 7- 3 4- 6 3- 6 27- 6 24- 6 29- 6 31- 6 24- 6 17- 6 MIN. QNH PRESSURE IN HPA 1010.3 1009.2 1005.4 1004.8 996.9 994.3 991.9 991.7 998.5 1004.3 1010.0 1011.3 991.7 DAY-HOUR 25-12 15-12 24- 3 17-12 9- 6 22-12 21-15 7-12 7-12 29-15 3-12 7-12 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 1015.9 1016.3 1011.2 1008.8 1004.9 999.8 997.4 1000.7 1005.2 1010.8 1015.3 1017.1 1008.6 MAX. QFE PRESSURE IN HPA 1022.2 1022.0 1016.2 1013.3 1010.4 1005.4 1001.1 1007.6 1010.8 1015.0 1021.2 1020.7 1022.2 DAY 13 4 1 7 5 3 27 24 29 31 24 17 MIN. QFE PRESSURE IN HPA 1010.6 1010.8 1005.1 1005.6 999.8 996.2 993.0 993.2 1000.2 1008.0 1011.2 1014.4 993.0 DAY 25 15 24 17 31 22 18 7 7 2 9 8 MEAN QNH PRESSURE IN HPA 1016.3 1016.6 1011.6 1009.1 1005.2 1000.1 997.7 1001.0 1005.5 1011.1 1015.6 1017.5 1008.9 MAX. QNH PRESSURE IN HPA 1022.5 1022.3 1016.5 1013.6 1010.7 1005.7 1001.4 1007.9 1011.1 1015.3 1021.5 1021.0 1022.5 DAY 13 4 1 7 5 3 27 24 29 31 24 17 MIN. QNH PRESSURE IN HPA 1010.9 1011.1 1005.4 1005.9 1000.1 996.5 993.3 993.5 1000.5 1008.3 1011.5 1014.7 993.3 DAY 25 15 24 17 31 22 18 7 7 2 9 8 MEAN QFF PRESSURE IN HPA 1016.5 1016.9 1011.8 1009.4 1005.5 1000.4 998.0 1001.3 1005.7 1011.4 1015.9 1017.7 1009.2 MAX. QFF PRESSURE IN HPA 1022.8 1022.6 1016.8 1013.9 1011.0 1006.0 1001.7 1008.2 1011.4 1015.6 1021.8 1021.3 1022.8 DAY 13 4 1 7 5 3 27 24 29 31 24 17 MIN. QFF PRESSURE IN HPA 1011.2 1011.4 1005.7 1006.2 1000.4 996.8 993.6 993.8 1000.8 1008.6 1011.8 1015.0 993.6 DAY 25 15 24 17 31 22 18 7 7 2 9 8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1017.6 1017.6 1012.9 1010.4 1005.8 1000.7 998.3 1001.4 1006.4 1012.3 1016.6 1018.7 1009.9 MAX. QFE PRESSURE IN HPA 1023.9 1023.2 1017.6 1013.3 1011.9 1006.7 1002.5 1008.7 1011.9 1016.2 1022.6 1022.3 1023.9 DAY 13 4 1 9 4 3 27 24 29 31 24 17 MIN. QFE PRESSURE IN HPA 1012.1 1011.5 1008.2 1006.5 996.6 996.5 994.5 994.5 1001.3 1009.1 1012.3 1015.2 994.5 DAY 25 15 18 18 9 22 18 7 7 2 3 7 MEAN QNH PRESSURE IN HPA 1017.9 1017.9 1013.3 1010.7 1006.1 1001.1 998.6 1001.8 1006.7 1012.6 1016.9 1019.1 1010.2 MAX. QNH PRESSURE IN HPA 1024.2 1023.5 1017.9 1013.6 1012.2 1007.0 1002.8 1009.0 1012.2 1016.5 1022.9 1022.6 1024.2 DAY 13 4 1 9 4 3 27 24 29 31 24 17 MIN. QNH PRESSURE IN HPA 1012.4 1011.8 1008.5 1006.8 996.9 996.8 994.8 994.8 1001.6 1009.4 1012.6 1015.5 994.8 DAY 25 15 18 18 9 22 18 7 7 2 3 7 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 1015.4 1015.8 1011.7 1009.3 1005.0 999.8 997.1 1000.3 1005.1 1010.5 1014.4 1016.4 1008.4 MAX. QFE PRESSURE IN HPA 1021.6 1020.8 1016.0 1012.4 1011.2 1005.5 1001.0 1007.4 1010.5 1013.9 1020.5 1020.4 1021.6 DAY 13 4 1 23 4 3 27 25 29 26 24 17 MIN. QFE PRESSURE IN HPA 1010.3 1009.8 1006.2 1006.1 1000.1 995.5 994.0 993.2 999.5 1007.5 1010.9 1012.5 993.2 DAY 25 15 18 17 31 22 21 7 10 1 3 7 MEAN QNH PRESSURE IN HPA 1015.7 1016.2 1012.0 1009.6 1005.4 1000.1 997.4 1000.6 1005.4 1010.8 1014.7 1016.7 1008.7 MAX. QNH PRESSURE IN HPA 1021.9 1021.1 1016.3 1012.7 1011.5 1005.8 1001.3 1007.7 1010.8 1014.2 1020.8 1020.7 1021.9 DAY 13 4 1 23 4 3 27 25 29 26 24 17 MIN. QNH PRESSURE IN HPA 1010.6 1010.1 1006.5 1006.4 1000.4 995.8 994.3 993.5 999.8 1007.8 1011.2 1012.8 993.5 DAY 25 15 18 17 31 22 21 7 10 1 3 7 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 1014.7 1014.6 1009.9 1007.7 1003.4 997.9 995.7 998.5 1003.5 1009.2 1013.4 1015.5 1007.0 MAX. QFE PRESSURE IN HPA 1020.0 1019.8 1015.1 1010.3 1010.1 1002.7 999.7 1005.1 1009.1 1012.8 1019.6 1019.4 1020.0 DAY 13 3 3 2 4 3 26 24 29 25 24 17 MIN. QFE PRESSURE IN HPA 1010.0 1008.9 1006.0 1004.5 998.0 994.0 991.9 991.4 998.2 1005.5 1009.7 1011.0 991.4 DAY 25 15 18 17 29 22 22 7 7 2 3 7 MEAN QNH PRESSURE IN HPA 1015.0 1014.9 1010.2 1008.0 1003.7 998.2 996.0 998.8 1003.8 1009.5 1013.7 1015.8 1007.3 MAX. QNH PRESSURE IN HPA 1020.3 1020.1 1015.4 1010.6 1010.4 1003.0 1000.0 1005.4 1009.4 1013.1 1019.9 1019.7 1020.3 DAY 13 3 3 2 4 3 26 24 29 25 24 17 MIN. QNH PRESSURE IN HPA 1010.3 1009.2 1006.3 1004.8 998.3 994.3 992.2 991.7 998.5 1005.8 1010.0 1011.3 991.7 DAY 25 15 18 17 29 22 22 7 7 2 3 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1015.3 1015.1 1010.3 1008.0 1003.5 998.1 995.5 998.8 1003.6 1009.4 1013.7 1016.1 1007.3 MAX. QFE PRESSURE IN HPA 1021.0 1021.1 1015.2 1011.7 1010.3 1003.7 999.1 1005.6 1009.1 1013.4 1020.1 1019.6 1021.1 DAY 13 3 3 6 4 3 26 24 29 25 24 17 MIN. QFE PRESSURE IN HPA 1010.4 1009.7 1006.7 1004.6 998.3 994.1 991.6 992.0 998.7 1004.0 1010.0 1012.0 991.6 DAY 25 11 18 17 29 22 21 6 10 29 3 7 MEAN QNH PRESSURE IN HPA 1015.6 1015.4 1010.6 1008.3 1003.8 998.4 995.8 999.2 1003.9 1009.7 1014.0 1016.5 1007.6 MAX. QNH PRESSURE IN HPA 1021.3 1021.4 1015.5 1012.0 1010.6 1004.0 999.4 1005.9 1009.4 1013.7 1020.4 1019.9 1021.4 DAY 13 3 3 6 4 3 26 24 29 25 24 17 MIN. QNH PRESSURE IN HPA 1010.7 1010.0 1007.0 1004.9 998.6 994.4 991.9 992.3 999.0 1004.3 1010.3 1012.3 991.9 DAY 25 11 18 17 29 22 21 6 10 29 3 7 MEAN QFF PRESSURE IN HPA 1015.9 1015.7 1010.9 1008.6 1004.1 998.6 996.0 999.4 1004.1 1009.9 1014.3 1016.7 1007.9 MAX. QFF PRESSURE IN HPA 1021.6 1021.7 1015.8 1012.3 1010.9 1004.3 999.7 1006.2 1009.7 1014.0 1020.7 1020.2 1021.7 DAY 13 3 3 6 4 3 26 24 29 25 24 17 MIN. QFF PRESSURE IN HPA 1011.0 1010.3 1007.3 1005.2 998.9 994.7 992.2 992.6 999.3 1004.6 1010.6 1012.6 992.2 DAY 25 11 18 17 29 22 21 6 10 29 3 7 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 JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.9 23.1 24.6 28.7 31.4 33.1 33.2 31.7 31.8 29.4 26.7 23.2 28.1 MINIMUN AIR TEMPERATURE (C) 14.7 17.0 19.0 22.2 25.7 29.3 28.5 28.4 27.7 23.9 19.7 16.9 22.8 DAYS WITH MINIMUM TEMP. >=21 0 0 6 23 31 30 31 31 30 28 8 0 218 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) 10.0 13.0 15.0 18.0 22.0 26.0 23.0 23.0 23.0 19.0 18.0 11.0 10.0 DAY 30 1 7 5 15 1 19 25 27 28 7 17 MAXIMUM AIR TEMPERATURE (C) 23.5 25.6 27.0 31.5 34.5 35.6 35.4 33.6 34.4 32.0 29.4 25.5 30.7 DAYS WITH MAXIMUM TEMP. >=30 0 1 4 25 31 30 31 31 30 30 13 0 226 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.0 30.0 31.0 36.0 43.0 42.0 39.0 37.0 37.0 36.0 31.0 28.0 43.0 DAY 1 23 22 23 28 15 21 20 26 20 2 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 8.6 8.0 9.3 8.8 6.3 6.9 5.2 6.7 8.1 9.7 8.6 7.9 MEAN DAILY TEMP. (MDT) (C) 19.1 21.3 23.0 26.8 30.1 32.5 32.0 31.0 31.0 28.0 24.5 21.2 26.7 COOLING DEG. DAYS(BASE 21 0C) 2.0 23.0 66.0 175.5 282.0 344.0 339.5 311.0 301.0 215.5 105.5 30.0 2195.0 HEATING DEG. DAYS(BASE 18 0C) 10.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.5 13.5 DEWPOINT (MEAN C) 11.6 14.8 16.2 18.9 21.4 26.4 26.7 26.0 23.8 22.6 18.6 13.0 20.0 MIXING RATIO (G/KG) 8.69 10.66 11.73 14.02 16.62 22.37 22.80 21.82 19.58 17.62 13.63 10.01 15.79 VAPOUR PRESSURE (HPA) 13.98 17.08 18.71 22.21 26.05 34.64 35.22 33.81 30.53 27.79 21.74 16.07 24.82 SATURATION DEF. (HPA) 11.12 11.41 12.40 17.39 20.26 16.12 15.79 13.05 16.85 13.40 13.58 12.70 14.51 RELATIVE HUMIDITY (MEAN %) 57 61 61 57 58 70 70 72 65 68 62 56 63 RELATIVE HUMIDITY (MAX. %) 71 72 72 71 73 79 78 80 76 79 73 71 75 RELATIVE HUMIDITY (MIN. %) 47 52 51 44 45 61 62 64 56 58 53 46 53 RELATIVE HUMIDITY (MEAN% 03UTC) 68 68 68 62 69 76 75 78 70 75 68 66 70 RELATIVE HUMIDITY (MEAN% 09UTC) 52 54 56 52 55 64 64 66 61 62 56 50 58 RELATIVE HUMIDITY (MEAN% 15UTC) 56 65 64 66 61 72 76 79 71 72 66 58 67 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 103.4 0.0 2.5 0.0 0.0 0.0 0.0 1.0 0.0 107.0 0.0 0.0 213.9 DAYS WITH PRECIPITATION >=10 3 0 0 0 0 0 0 0 0 2 0 0 5 DAYS WITH PRECIPITATION >= 5 3 0 0 0 0 0 0 0 0 2 0 0 5 DAYS WITH PRECIPITATION >= 1 6 0 1 0 0 0 0 1 0 2 0 0 10 DAYS WITH PRECIPITATION 7 0 2 0 0 0 0 1 0 2 0 0 12 GREATEST DAILY PRECIPITATION 51.0 0.0 2.0 0.0 0.0 0.0 0.0 1.0 0.0 70.0 0.0 0.0 70.0 DAY 18 ** 8 ** ** ** ** 24 ** 25 ** ** DAY WITH THUNDER STORM 5 2 6 0 0 0 1 0 0 2 0 0 16 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 6 7 1 7 7 4 5 0 2 2 3 45 WIND DIRECTION (PREVAILING) 270 270 270 270 270 180 180 180 180 180 270 270 270 PREVAILING WIND SPEED(KNOTS) 4.4 5.0 6.5 3.9 5.6 6.1 5.4 4.0 4.8 3.5 4.2 5.9 5.0 PREVAILING WIND PERCENT 21.9 28.6 48.4 72.0 65.2 52.7 48.4 59.4 37.3 44.5 42.7 40.6 35.8 CALMS PERCENT OF WIND 4.5 10.7 3.9 0.0 0.0 0.0 0.0 1.3 4.7 5.8 16.0 9.0 4.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 309 247 246 260 250 180 171 141 174 199 233 258 211 VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.4 2.2 2.7 3.6 3.8 3.3 4.0 2.4 1.7 2.2 2.1 1.8 WIND STEADINESES (MEAN %) 24.1 48.3 43.1 77.1 72.0 62.3 63.5 85.1 54.5 47.2 71.0 60.0 42.9 WIND SPEED (MEAN KNOTS) 2.9 2.9 5.1 3.5 5.0 6.1 5.2 4.7 4.4 3.6 3.1 3.5 4.2 FASTEST WIND DIRECTION 290 270 270 270 270 270 270 110 180 270 270 290 290 FASTEST WIND SPEED (KNOTS) 20 20 16 12 20 25 18 14 10 18 16 36 36 DAY 28 21 14 9 20 5 27 23 21 21 22 15 DAYS WITH SKY CLEAR (0-2)/8 20 23 24 27 31 29 27 28 28 30 30 26 323 DAYS WITH P.CLOUDY (3-6)/8 8 5 7 3 0 1 4 3 2 1 0 3 37 DAYS WITH CLOUDY (7-8)/8 3 0 0 0 0 0 0 0 0 0 0 2 5 DAYS WITH VISIBILITY =< 2 KM 1 0 3 2 4 5 4 0 0 1 0 2 22 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1016.0 1014.4 1011.4 1008.9 1002.4 998.3 996.5 998.2 1002.4 1009.6 1014.7 1016.8 1007.5 MAX. QFE PRESSURE IN HPA 1023.2 1022.4 1017.8 1014.0 1007.8 1003.7 1001.8 1009.0 1008.8 1017.7 1019.5 1024.5 1024.5 DAY-HOUR 30- 6 4- 6 3- 6 5- 6 1- 6 21- 6 25- 6 17- 6 22- 6 30- 6 28- 6 16- 6 MIN. QFE PRESSURE IN HPA 1010.1 1005.7 1004.7 1003.1 994.8 993.6 992.5 993.1 996.4 1004.2 1010.6 1009.5 992.5 DAY-HOUR 28-12 23-12 5-12 18-12 29-12 13-15 27-15 21-15 9-15 5-15 22-12 1-12 MEAN QNH PRESSURE IN HPA 1016.3 1014.7 1011.7 1009.2 1002.7 998.7 996.8 998.5 1002.7 1010.0 1015.0 1017.1 1007.8 MAX. QNH PRESSURE IN HPA 1023.5 1022.7 1018.1 1014.3 1008.1 1004.0 1002.1 1009.3 1009.1 1018.0 1019.8 1024.8 1024.8 DAY-HOUR 30- 6 4- 6 3- 6 5- 6 1- 6 21- 6 25- 6 17- 6 22- 6 30- 6 28- 6 16- 6 MIN. QNH PRESSURE IN HPA 1010.4 1006.0 1005.0 1003.4 995.1 993.9 992.8 993.4 996.7 1004.5 1010.9 1009.8 992.8 DAY-HOUR 28-12 23-12 5-12 18-12 29-12 13-15 27-15 21-15 9-15 5-15 22-12 1-12 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 1016.2 1014.8 1011.6 1009.0 1002.8 998.6 997.0 998.6 1002.9 1010.1 1015.5 1017.0 1007.8 MAX. QFE PRESSURE IN HPA 1021.3 1020.0 1016.2 1012.1 1006.5 1002.5 1000.9 1001.6 1008.1 1016.3 1018.7 1022.2 1022.2 DAY 30 4 3 5 1 21 25 24 23 31 29 16 MIN. QFE PRESSURE IN HPA 1012.1 1007.6 1005.5 1005.7 996.2 995.8 994.6 995.9 998.2 1005.6 1012.8 1010.2 994.6 DAY 12 23 6 23 29 14 27 7 1 23 25 1 MEAN QNH PRESSURE IN HPA 1016.5 1015.1 1011.9 1009.4 1003.1 998.9 997.3 998.9 1003.2 1010.4 1015.9 1017.4 1008.2 MAX. QNH PRESSURE IN HPA 1021.6 1020.3 1016.5 1012.4 1006.8 1002.8 1001.2 1001.9 1008.4 1016.6 1019.0 1022.5 1022.5 DAY 30 4 3 5 1 21 25 24 23 31 29 16 MIN. QNH PRESSURE IN HPA 1012.4 1007.9 1005.8 1006.0 996.5 996.1 994.9 996.2 998.5 1005.9 1013.1 1010.5 994.9 DAY 12 23 6 23 29 14 27 7 1 23 25 1 MEAN QFF PRESSURE IN HPA 1016.8 1015.4 1012.2 1009.6 1003.3 999.2 997.5 999.2 1003.5 1010.7 1016.1 1017.6 1008.4 MAX. QFF PRESSURE IN HPA 1021.9 1020.6 1016.8 1012.7 1007.1 1003.1 1001.5 1002.2 1008.7 1016.9 1019.3 1022.8 1022.8 DAY 30 4 3 5 1 21 25 24 23 31 29 16 MIN. QFF PRESSURE IN HPA 1012.7 1008.2 1006.1 1006.3 996.8 996.4 995.2 996.5 998.8 1006.2 1013.4 1010.8 995.2 DAY 12 23 6 23 29 14 27 7 1 23 25 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1017.9 1016.2 1013.2 1010.6 1003.9 999.8 997.8 999.8 1003.9 1011.3 1016.5 1018.4 1009.1 MAX. QFE PRESSURE IN HPA 1023.2 1022.4 1017.8 1014.0 1007.8 1003.7 1001.8 1009.0 1008.8 1017.7 1019.5 1024.5 1024.5 DAY 30 4 3 5 1 21 25 17 22 30 28 16 MIN. QFE PRESSURE IN HPA 1012.1 1008.4 1006.5 1006.7 996.8 996.5 995.3 996.7 999.5 1006.4 1013.2 1011.3 995.3 DAY 12 23 6 19 29 14 7 6 1 22 25 1 MEAN QNH PRESSURE IN HPA 1018.2 1016.5 1013.5 1010.9 1004.3 1000.1 998.1 1000.2 1004.2 1011.6 1016.8 1018.8 1009.4 MAX. QNH PRESSURE IN HPA 1023.5 1022.7 1018.1 1014.3 1008.1 1004.0 1002.1 1009.3 1009.1 1018.0 1019.8 1024.8 1024.8 DAY 30 4 3 5 1 21 25 17 22 30 28 16 MIN. QNH PRESSURE IN HPA 1012.4 1008.7 1006.8 1007.0 997.1 996.8 995.6 997.0 999.8 1006.7 1013.5 1011.6 995.6 DAY 12 23 6 19 29 14 7 6 1 22 25 1 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 1015.8 1014.3 1011.4 1009.0 1003.0 998.7 996.6 998.4 1002.5 1009.8 1014.5 1016.7 1007.6 MAX. QFE PRESSURE IN HPA 1020.4 1020.2 1016.0 1013.1 1006.6 1003.4 1000.7 1000.9 1007.1 1016.4 1017.3 1022.3 1022.3 DAY 30 4 3 5 10 21 25 24 27 30 29 31 MIN. QFE PRESSURE IN HPA 1010.8 1007.8 1005.9 1004.3 996.7 995.7 994.0 994.7 997.4 1006.0 1011.5 1010.3 994.0 DAY 28 23 6 18 29 13 27 21 9 5 25 1 MEAN QNH PRESSURE IN HPA 1016.1 1014.6 1011.8 1009.4 1003.3 999.1 996.9 998.7 1002.9 1010.1 1014.8 1017.0 1007.9 MAX. QNH PRESSURE IN HPA 1020.7 1020.5 1016.3 1013.4 1006.9 1003.7 1001.0 1001.2 1007.4 1016.7 1017.6 1022.6 1022.6 DAY 30 4 3 5 10 21 25 24 27 30 29 31 MIN. QNH PRESSURE IN HPA 1011.1 1008.1 1006.2 1004.6 997.0 996.0 994.3 995.0 997.7 1006.3 1011.8 1010.6 994.3 DAY 28 23 6 18 29 13 27 21 9 5 25 1 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 1014.8 1013.1 1010.1 1007.8 1001.2 997.4 995.9 997.0 1001.2 1008.6 1013.4 1015.6 1006.3 MAX. QFE PRESSURE IN HPA 1019.8 1018.9 1013.6 1012.1 1004.8 1000.3 998.8 999.1 1006.1 1014.8 1015.8 1020.6 1020.6 DAY 30 4 2 5 10 2 25 14 22 31 28 16 MIN. QFE PRESSURE IN HPA 1010.1 1005.7 1004.7 1003.1 994.8 994.6 993.0 994.3 996.7 1004.2 1010.6 1009.5 993.0 DAY 28 23 5 18 29 14 7 6 1 22 22 1 MEAN QNH PRESSURE IN HPA 1015.1 1013.4 1010.4 1008.1 1001.5 997.7 996.2 997.3 1001.6 1008.9 1013.7 1015.9 1006.6 MAX. QNH PRESSURE IN HPA 1020.1 1019.2 1013.9 1012.4 1005.1 1000.6 999.1 999.4 1006.4 1015.1 1016.1 1020.9 1020.9 DAY 30 4 2 5 10 2 25 14 22 31 28 16 MIN. QNH PRESSURE IN HPA 1010.4 1006.0 1005.0 1003.4 995.1 994.9 993.3 994.6 997.0 1004.5 1010.9 1009.8 993.3 DAY 28 23 5 18 29 14 7 6 1 22 22 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1015.6 1013.5 1010.5 1007.9 1001.3 997.2 995.3 997.0 1001.5 1008.6 1013.7 1016.3 1006.5 MAX. QFE PRESSURE IN HPA 1020.0 1018.8 1014.2 1011.2 1005.0 1000.5 998.4 1000.6 1006.2 1015.5 1016.4 1021.3 1021.3 DAY 30 4 3 4 10 2 25 23 22 29 28 16 MIN. QFE PRESSURE IN HPA 1010.3 1006.0 1004.7 1003.2 995.3 993.6 992.5 993.1 996.4 1004.2 1010.9 1009.7 992.5 DAY 28 23 5 18 28 13 27 21 9 5 22 1 MEAN QNH PRESSURE IN HPA 1015.9 1013.8 1010.8 1008.3 1001.6 997.5 995.6 997.3 1001.8 1008.9 1014.0 1016.6 1006.8 MAX. QNH PRESSURE IN HPA 1020.3 1019.1 1014.5 1011.5 1005.3 1000.8 998.7 1000.9 1006.5 1015.8 1016.7 1021.6 1021.6 DAY 30 4 3 4 10 2 25 23 22 29 28 16 MIN. QNH PRESSURE IN HPA 1010.6 1006.3 1005.0 1003.5 995.6 993.9 992.8 993.4 996.7 1004.5 1011.2 1010.0 992.8 DAY 28 23 5 18 28 13 27 21 9 5 22 1 MEAN QFF PRESSURE IN HPA 1016.2 1014.1 1011.1 1008.5 1001.8 997.8 995.9 997.6 1002.0 1009.1 1014.3 1016.9 1007.1 MAX. QFF PRESSURE IN HPA 1020.6 1019.4 1014.8 1011.8 1005.6 1001.1 999.0 1001.2 1006.8 1016.1 1017.0 1021.9 1021.9 DAY 30 4 3 4 10 2 25 23 27 29 28 16 MIN. QFF PRESSURE IN HPA 1010.9 1006.6 1005.3 1003.8 995.9 994.2 993.1 993.7 997.0 1004.8 1011.5 1010.3 993.1 DAY 28 23 5 18 28 13 27 21 9 5 22 1 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 JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.8 21.6 24.5 28.3 30.8 32.1 31.7 31.0 31.2 28.2 25.0 23.2 27.4 MINIMUN AIR TEMPERATURE (C) 13.6 15.1 18.0 22.9 25.3 26.8 27.5 27.0 25.6 21.6 19.1 19.2 21.8 DAYS WITH MINIMUM TEMP. >=21 0 0 4 27 31 30 31 29 30 18 3 7 210 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) 6.0 10.0 15.0 20.0 21.0 23.0 22.0 20.0 22.0 18.0 17.0 12.0 6.0 DAY 24 4 1 2 1 21 10 23 25 23 12 23 MAXIMUM AIR TEMPERATURE (C) 23.8 23.9 27.3 31.5 33.4 35.1 34.1 32.8 34.0 31.3 27.6 26.5 30.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 6 25 31 30 31 31 30 29 2 0 215 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 28.0 29.0 32.0 36.0 39.0 38.0 40.0 40.0 39.0 35.0 30.0 29.0 40.0 DAY 3 24 30 18 26 3 28 8 24 1 1 5 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 8.8 9.3 8.6 8.1 8.3 6.6 5.8 8.4 9.7 8.5 7.3 8.3 MEAN DAILY TEMP. (MDT) (C) 18.7 19.5 22.6 27.2 29.4 30.9 30.8 29.9 29.8 26.5 23.3 22.9 26.0 COOLING DEG. DAYS(BASE 21 0C) 3.0 4.5 56.0 186.0 259.5 297.5 304.0 276.5 264.0 170.0 70.0 65.0 1956.0 HEATING DEG. DAYS(BASE 18 0C) 23.5 8.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 32.5 DEWPOINT (MEAN C) 9.2 12.3 14.3 17.3 22.8 20.4 26.1 25.3 21.3 19.5 17.0 15.4 18.4 MIXING RATIO (G/KG) 7.77 9.27 10.52 12.67 18.36 15.69 22.04 20.81 17.44 14.84 12.30 11.16 14.41 VAPOUR PRESSURE (HPA) 12.52 14.86 16.85 20.10 28.70 24.46 34.09 32.34 27.32 23.52 19.70 17.89 22.69 SATURATION DEF. (HPA) 12.55 11.24 14.28 18.76 15.86 23.67 13.01 12.83 18.54 15.06 12.27 10.97 14.92 RELATIVE HUMIDITY (MEAN %) 51 57 55 53 65 52 74 73 61 62 62 62 61 RELATIVE HUMIDITY (MAX. %) 63 70 70 70 77 65 84 79 76 77 74 72 73 RELATIVE HUMIDITY (MIN. %) 40 48 44 40 54 40 64 66 48 47 54 53 50 RELATIVE HUMIDITY (MEAN% 03UTC) 55 66 62 65 67 60 78 76 57 64 70 69 66 RELATIVE HUMIDITY (MEAN% 09UTC) 44 52 47 46 62 50 66 67 55 54 56 56 55 RELATIVE HUMIDITY (MEAN% 15UTC) 57 61 62 59 70 55 80 78 74 72 65 67 67 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.0 0.0 52.0 DAYS WITH PRECIPITATION >=10 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 2 0 0 0 0 0 0 0 0 0 1 0 3 DAYS WITH PRECIPITATION >= 1 2 0 0 0 0 0 0 0 0 0 2 0 4 DAYS WITH PRECIPITATION 2 0 0 0 0 0 0 0 0 0 2 0 4 GREATEST DAILY PRECIPITATION 30.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8.0 0.0 30.0 DAY 24 ** ** ** ** ** ** ** ** ** 11 ** DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 3 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 6 5 7 4 3 9 1 2 1 0 1 2 41 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 180 180 180 270 225 270 270 PREVAILING WIND SPEED(KNOTS) 4.2 7.2 6.4 5.8 4.4 6.2 5.5 5.3 4.5 3.5 2.0 3.9 5.1 PREVAILING WIND PERCENT 38.1 52.9 61.3 82.0 41.9 69.3 71.0 86.5 50.0 49.0 23.3 23.9 41.1 CALMS PERCENT OF WIND 7.1 6.4 11.6 5.3 1.9 8.0 0.6 1.9 6.0 9.0 7.3 4.5 5.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 247 269 271 268 232 274 182 179 207 248 200 334 238 VECTOR WIND MAGNITUDE(KNOTS) 0.6 1.9 3.2 4.6 2.2 5.1 4.0 4.7 2.3 1.9 0.9 0.8 2.0 WIND STEADINESES (MEAN %) 17.6 27.9 65.3 88.5 59.5 92.7 80.0 92.2 57.5 67.9 40.9 23.5 46.5 WIND SPEED (MEAN KNOTS) 3.4 6.8 4.9 5.2 3.7 5.5 5.0 5.1 4.0 2.8 2.2 3.4 4.3 FASTEST WIND DIRECTION 90 90 290 270 130 310 180 180 290 270 130 340 90 FASTEST WIND SPEED (KNOTS) 20 32 32 30 18 20 18 12 20 12 12 20 32 DAY 23 14 23 8 31 4 9 29 24 1 9 31 DAYS WITH SKY CLEAR (0-2)/8 24 23 28 26 29 30 31 31 27 31 22 24 326 DAYS WITH P.CLOUDY (3-6)/8 7 5 2 3 2 0 0 0 3 0 7 6 35 DAYS WITH CLOUDY (7-8)/8 0 0 1 1 0 0 0 0 0 0 1 1 4 DAYS WITH VISIBILITY =< 2 KM 0 2 2 5 0 2 2 0 1 1 0 0 15 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1016.3 1013.1 1013.7 1008.0 1002.9 995.6 996.5 999.4 1005.1 1011.1 1016.2 1016.1 1007.8 MAX. QFE PRESSURE IN HPA 1023.5 1021.5 1020.5 1013.7 1010.3 1000.4 1001.4 1005.2 1009.9 1017.8 1024.0 1021.8 1024.0 DAY-HOUR 4- 6 4- 6 10- 6 9- 6 30- 9 15- 6 6- 6 24- 3 15- 6 23- 6 20- 6 31- 6 MIN. QFE PRESSURE IN HPA 1012.0 1008.7 1005.7 1004.0 996.7 990.7 992.4 990.4 999.8 1002.0 1011.1 1010.2 990.4 DAY-HOUR 19-12 13-15 20-15 16- 3 26-15 23-15 27-15 9-15 3-15 3- 3 1-15 20-12 MEAN QNH PRESSURE IN HPA 1016.6 1013.5 1014.0 1008.4 1003.2 995.9 996.9 999.7 1005.4 1011.4 1016.5 1016.4 1008.2 MAX. QNH PRESSURE IN HPA 1023.8 1021.8 1020.8 1014.0 1010.6 1000.7 1001.7 1005.5 1010.2 1018.1 1024.3 1022.1 1024.3 DAY-HOUR 4- 6 4- 6 10- 6 9- 6 30- 9 15- 6 6- 6 24- 3 15- 6 23- 6 20- 6 31- 6 MIN. QNH PRESSURE IN HPA 1012.3 1009.0 1006.0 1004.3 997.0 991.0 992.7 990.7 1000.1 1002.3 1011.4 1010.5 990.7 DAY-HOUR 19-12 13-15 20-15 16- 3 26-15 23-15 27-15 9-15 3-15 3- 3 1-15 20-12 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 1016.7 1013.4 1013.9 1008.0 1003.2 996.4 997.1 1000.1 1005.6 1011.4 1017.0 1016.7 1008.3 MAX. QFE PRESSURE IN HPA 1022.5 1019.9 1018.6 1010.6 1007.1 1000.1 1001.1 1005.2 1009.3 1016.2 1021.8 1019.8 1022.5 DAY 4 4 10 9 4 15 10 24 15 25 20 31 MIN. QFE PRESSURE IN HPA 1012.6 1010.3 1007.3 1004.0 997.0 993.1 994.0 991.7 1001.8 1002.0 1012.0 1012.3 991.7 DAY 31 22 21 16 26 24 3 9 3 3 1 20 MEAN QNH PRESSURE IN HPA 1017.1 1013.7 1014.2 1008.3 1003.5 996.7 997.4 1000.5 1005.9 1011.8 1017.3 1017.0 1008.6 MAX. QNH PRESSURE IN HPA 1022.8 1020.2 1018.9 1010.9 1007.4 1000.4 1001.4 1005.5 1009.6 1016.5 1022.1 1020.1 1022.8 DAY 4 4 10 9 4 15 10 24 15 25 20 31 MIN. QNH PRESSURE IN HPA 1012.9 1010.6 1007.6 1004.3 997.3 993.4 994.3 992.0 1002.1 1002.3 1012.3 1012.6 992.0 DAY 31 22 21 16 26 24 3 9 3 3 1 20 MEAN QFF PRESSURE IN HPA 1017.3 1014.0 1014.4 1008.6 1003.8 996.9 997.7 1000.7 1006.2 1012.0 1017.6 1017.3 1008.9 MAX. QFF PRESSURE IN HPA 1023.1 1020.5 1019.2 1011.2 1007.7 1000.7 1001.7 1005.8 1009.9 1016.8 1022.4 1020.4 1023.1 DAY 4 4 10 9 4 15 10 24 15 25 20 31 MIN. QFF PRESSURE IN HPA 1013.2 1010.9 1007.9 1004.6 997.6 993.7 994.6 992.3 1002.4 1002.6 1012.6 1012.9 992.3 DAY 31 22 21 16 26 24 3 9 3 3 1 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1017.9 1014.8 1015.3 1009.3 1003.9 996.7 997.6 1000.7 1006.3 1012.4 1017.9 1017.3 1009.2 MAX. QFE PRESSURE IN HPA 1023.5 1021.5 1020.5 1013.7 1007.2 1000.4 1001.4 1004.9 1009.9 1017.8 1024.0 1021.8 1024.0 DAY 4 4 10 9 1 15 6 24 15 23 20 31 MIN. QFE PRESSURE IN HPA 1013.4 1011.6 1008.8 1006.5 997.4 992.9 994.0 992.3 1002.4 1004.6 1012.9 1012.4 992.3 DAY 31 26 20 18 26 24 3 9 3 1 1 20 MEAN QNH PRESSURE IN HPA 1018.2 1015.1 1015.6 1009.6 1004.3 997.0 997.9 1001.0 1006.6 1012.7 1018.3 1017.7 1009.5 MAX. QNH PRESSURE IN HPA 1023.8 1021.8 1020.8 1014.0 1007.5 1000.7 1001.7 1005.2 1010.2 1018.1 1024.3 1022.1 1024.3 DAY 4 4 10 9 1 15 6 24 15 23 20 31 MIN. QNH PRESSURE IN HPA 1013.7 1011.9 1009.1 1006.8 997.7 993.2 994.3 992.6 1002.7 1004.9 1013.2 1012.7 992.6 DAY 31 26 20 18 26 24 3 9 3 1 1 20 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 1016.2 1013.3 1014.0 1008.5 1003.3 995.9 996.8 999.5 1005.3 1011.1 1016.1 1016.0 1008.0 MAX. QFE PRESSURE IN HPA 1021.2 1020.5 1019.7 1012.7 1010.3 999.6 1000.7 1004.0 1008.4 1015.7 1020.9 1019.7 1021.2 DAY 5 4 10 9 30 15 6 24 15 24 20 31 MIN. QFE PRESSURE IN HPA 1013.0 1010.0 1006.8 1005.9 997.1 992.7 993.5 991.4 1001.2 1005.0 1011.5 1010.3 991.4 DAY 16 26 20 23 26 24 3 9 3 1 1 20 MEAN QNH PRESSURE IN HPA 1016.5 1013.6 1014.3 1008.9 1003.6 996.2 997.1 999.8 1005.7 1011.4 1016.4 1016.3 1008.3 MAX. QNH PRESSURE IN HPA 1021.5 1020.8 1020.0 1013.0 1010.6 999.9 1001.0 1004.3 1008.7 1016.0 1021.2 1020.0 1021.5 DAY 5 4 10 9 30 15 6 24 15 24 20 31 MIN. QNH PRESSURE IN HPA 1013.3 1010.3 1007.1 1006.2 997.4 993.0 993.8 991.7 1001.5 1005.3 1011.8 1010.6 991.7 DAY 16 26 20 23 26 24 3 9 3 1 1 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 1015.3 1012.2 1012.7 1007.5 1002.5 994.9 996.0 998.7 1004.3 1010.4 1015.2 1015.3 1007.1 MAX. QFE PRESSURE IN HPA 1021.3 1018.4 1017.9 1012.4 1009.2 999.4 1000.5 1003.4 1007.8 1015.4 1019.7 1019.4 1021.3 DAY 4 4 10 10 7 2 6 24 21 24 20 31 MIN. QFE PRESSURE IN HPA 1012.0 1009.4 1006.2 1005.6 996.9 991.6 992.9 991.2 1000.6 1005.0 1011.3 1010.2 991.2 DAY 19 21 20 6 26 24 27 9 3 3 1 20 MEAN QNH PRESSURE IN HPA 1015.6 1012.5 1013.1 1007.8 1002.8 995.2 996.3 999.0 1004.6 1010.7 1015.5 1015.7 1007.4 MAX. QNH PRESSURE IN HPA 1021.6 1018.7 1018.2 1012.7 1009.5 999.7 1000.8 1003.7 1008.1 1015.7 1020.0 1019.7 1021.6 DAY 4 4 10 10 7 2 6 24 21 24 20 31 MIN. QNH PRESSURE IN HPA 1012.3 1009.7 1006.5 1005.9 997.2 991.9 993.2 991.5 1000.9 1005.3 1011.6 1010.5 991.5 DAY 19 21 20 6 26 24 27 9 3 3 1 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1015.6 1012.1 1012.8 1007.1 1001.8 994.4 995.2 997.8 1003.8 1010.0 1014.9 1015.0 1006.7 MAX. QFE PRESSURE IN HPA 1021.7 1018.5 1017.7 1011.8 1007.7 998.0 999.7 1002.8 1007.0 1014.6 1022.0 1020.0 1022.0 DAY 4 4 10 10 30 1 6 24 20 24 22 31 MIN. QFE PRESSURE IN HPA 1012.0 1008.7 1005.7 1004.5 996.7 990.7 992.4 990.4 999.8 1005.0 1011.1 1011.2 990.4 DAY 23 13 20 6 26 23 27 9 3 2 1 20 MEAN QNH PRESSURE IN HPA 1015.9 1012.4 1013.1 1007.4 1002.1 994.7 995.6 998.1 1004.2 1010.3 1015.2 1015.4 1007.0 MAX. QNH PRESSURE IN HPA 1022.0 1018.8 1018.0 1012.1 1008.0 998.3 1000.0 1003.1 1007.3 1014.9 1022.3 1020.3 1022.3 DAY 4 4 10 10 30 1 6 24 20 24 22 31 MIN. QNH PRESSURE IN HPA 1012.3 1009.0 1006.0 1004.8 997.0 991.0 992.7 990.7 1000.1 1005.3 1011.4 1011.5 990.7 DAY 23 13 20 6 26 23 27 9 3 2 1 20 MEAN QFF PRESSURE IN HPA 1016.2 1012.7 1013.4 1007.6 1002.3 995.0 995.8 998.4 1004.4 1010.6 1015.5 1015.6 1007.3 MAX. QFF PRESSURE IN HPA 1022.3 1019.1 1018.3 1012.4 1008.3 998.6 1000.3 1003.4 1007.6 1015.2 1022.6 1020.6 1022.6 DAY 4 4 10 10 30 1 6 24 20 24 22 31 MIN. QFF PRESSURE IN HPA 1012.6 1009.3 1006.3 1005.1 997.3 991.3 993.0 991.0 1000.4 1005.6 1011.7 1011.8 991.0 DAY 23 13 20 6 26 23 27 9 3 2 1 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 20.6 18.6 22.5 26.0 29.6 32.3 33.3 33.0 31.0 29.0 26.1 21.5 27.0 MINIMUN AIR TEMPERATURE (C) 17.2 14.1 18.5 22.0 25.3 28.9 30.4 29.2 27.5 23.9 21.2 16.1 22.9 DAYS WITH MINIMUM TEMP. >=21 2 0 6 26 31 30 31 31 30 30 22 2 241 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) 14.0 10.0 15.0 14.0 22.0 27.0 28.0 26.0 25.0 20.0 18.0 9.0 9.0 DAY 20 4 19 7 5 3 3 13 24 29 27 28 MAXIMUM AIR TEMPERATURE (C) 23.2 21.1 25.0 29.1 32.5 35.3 35.7 35.7 33.4 32.6 29.1 24.7 29.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 11 28 30 31 31 30 31 15 0 207 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 25.0 23.0 29.0 32.0 37.0 43.0 42.0 40.0 37.0 36.0 31.0 29.0 43.0 DAY 14 8 26 8 30 12 17 24 1 19 15 3 DIF. BETWEEN (MAX.-MIN.) (C) 6.0 7.0 6.5 7.1 7.2 6.4 5.3 6.5 5.9 8.7 7.9 8.6 6.9 MEAN DAILY TEMP. (MDT) (C) 20.2 17.6 21.7 25.5 28.9 32.1 33.1 32.5 30.4 28.2 25.2 20.4 26.3 COOLING DEG. DAYS(BASE 21 0C) 6.5 0.0 35.5 136.5 244.0 332.0 374.5 355.5 283.0 224.5 125.0 21.0 2138.0 HEATING DEG. DAYS(BASE 18 0C) 1.0 31.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.5 44.0 DEWPOINT (MEAN C) 13.9 7.9 16.5 19.2 20.0 26.3 26.7 25.6 26.0 22.7 17.4 11.2 19.5 MIXING RATIO (G/KG) 10.13 7.07 11.87 14.13 14.94 22.22 22.96 21.49 21.71 17.74 12.95 8.92 15.51 VAPOUR PRESSURE (HPA) 16.28 11.41 18.97 22.42 23.59 34.46 35.46 33.39 33.92 28.03 20.67 14.36 24.41 SATURATION DEF. (HPA) 8.17 10.37 8.55 11.33 18.18 14.30 15.84 17.26 11.17 12.42 13.42 11.77 12.73 RELATIVE HUMIDITY (MEAN %) 67 52 70 67 58 72 70 67 76 70 61 54 65 RELATIVE HUMIDITY (MAX. %) 76 63 82 79 72 83 80 79 86 82 75 63 77 RELATIVE HUMIDITY (MIN. %) 58 44 60 56 44 62 62 57 66 57 51 46 55 RELATIVE HUMIDITY (MEAN% 03UTC) 73 60 75 73 67 79 75 75 80 75 70 59 72 RELATIVE HUMIDITY (MEAN% 09UTC) 63 46 67 62 56 70 66 62 71 67 56 50 61 RELATIVE HUMIDITY (MEAN% 15UTC) 67 55 74 75 60 72 76 70 80 75 66 56 69 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 50.0 1.0 94.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.0 154.0 DAYS WITH PRECIPITATION >=10 2 0 4 0 0 0 0 0 0 0 0 0 6 DAYS WITH PRECIPITATION >= 5 2 0 4 1 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 1 2 1 4 1 0 0 0 0 0 0 0 1 9 DAYS WITH PRECIPITATION 3 1 4 1 0 0 0 0 0 0 0 2 11 GREATEST DAILY PRECIPITATION 38.0 1.0 51.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.0 51.0 DAY 19 3 14 25 ** ** ** ** ** ** ** 6 DAY WITH THUNDER STORM 2 0 0 3 0 0 0 0 0 0 0 0 5 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 3 3 3 8 2 2 4 1 3 1 0 33 WIND DIRECTION (PREVAILING) 90 135 270 270 270 180 135 135 135 270 225 270 270 PREVAILING WIND SPEED(KNOTS) 8.9 7.6 7.8 7.8 9.4 6.5 9.5 9.6 8.2 8.4 6.5 7.7 7.8 PREVAILING WIND PERCENT 21.3 17.2 32.9 48.0 56.1 27.3 26.5 21.3 41.3 32.3 22.0 29.7 25.0 CALMS PERCENT OF WIND 3.9 3.4 3.2 7.3 3.9 4.7 3.9 3.2 2.0 1.9 3.3 1.9 3.6 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 102 250 276 251 266 163 158 164 139 244 205 288 214 VECTOR WIND MAGNITUDE(KNOTS) 1.2 0.4 2.5 4.1 6.9 3.3 4.3 3.9 4.9 3.5 2.0 3.2 1.9 WIND STEADINESES (MEAN %) 22.2 5.6 35.2 61.2 87.3 50.0 57.3 49.4 62.8 56.5 33.9 50.8 27.5 WIND SPEED (MEAN KNOTS) 5.4 7.1 7.1 6.7 7.9 6.6 7.5 7.9 7.8 6.2 5.9 6.3 6.9 FASTEST WIND DIRECTION 110 270 90 280 270 120 90 120 150 250 270 300 270 FASTEST WIND SPEED (KNOTS) 20 25 25 15 20 22 22 25 20 18 20 20 25 DAY 18 21 14 4 16 16 21 1 9 1 15 25 DAYS WITH SKY CLEAR (0-2)/8 15 22 14 19 31 27 22 29 30 29 25 13 276 DAYS WITH P.CLOUDY (3-6)/8 13 5 11 8 0 3 7 2 0 2 5 17 73 DAYS WITH CLOUDY (7-8)/8 3 2 6 3 0 0 2 0 0 0 0 1 17 DAYS WITH VISIBILITY =< 2 KM 0 0 2 0 0 0 1 0 0 3 0 0 6 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1016.7 1017.4 1013.7 1010.3 1005.9 999.8 997.0 1000.8 1006.5 1012.1 1015.2 1018.2 1009.5 MAX. QFE PRESSURE IN HPA 1022.9 1025.2 1019.9 1014.0 1012.4 1006.6 1004.5 1005.6 1012.8 1019.8 1021.1 1028.7 1028.7 DAY-HOUR 5- 6 25- 6 15- 9 28- 6 25- 6 5- 3 21- 6 15- 6 28- 6 28- 6 23- 6 27- 6 MIN. QFE PRESSURE IN HPA 1008.5 1010.5 1009.5 1005.4 1001.5 994.0 993.0 994.3 999.5 1007.7 1010.5 1012.6 993.0 DAY-HOUR 30-12 15-12 2-12 3-12 2-12 29-12 3-15 5-12 4- 3 16-12 15-12 18-12 MEAN QNH PRESSURE IN HPA 1017.0 1017.7 1014.0 1010.6 1006.2 1000.1 997.3 1001.1 1006.8 1012.4 1015.5 1018.5 1009.8 MAX. QNH PRESSURE IN HPA 1023.2 1025.5 1020.2 1014.3 1012.7 1006.9 1004.8 1005.9 1013.1 1020.1 1021.4 1029.0 1029.0 DAY-HOUR 5- 6 25- 6 15- 9 28- 6 25- 6 5- 3 21- 6 15- 6 28- 6 28- 6 23- 6 27- 6 MIN. QNH PRESSURE IN HPA 1008.8 1010.8 1009.8 1005.7 1001.8 994.3 993.3 994.6 999.8 1008.0 1010.8 1012.9 993.3 DAY-HOUR 30-12 15-12 2-12 3-12 2-12 29-12 3-15 5-12 4- 3 16-12 15-12 18-12 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 1017.1 1017.8 1013.8 1010.3 1006.2 1000.5 997.5 1001.2 1006.8 1012.7 1015.7 1018.6 1009.8 MAX. QFE PRESSURE IN HPA 1022.6 1023.1 1017.6 1012.5 1010.5 1006.6 1002.1 1004.7 1011.6 1018.5 1019.7 1027.0 1027.0 DAY 9 25 16 28 25 5 21 30 28 28 23 27 MIN. QFE PRESSURE IN HPA 1008.8 1012.1 1010.5 1007.2 1003.3 996.8 994.4 996.8 999.5 1009.3 1012.5 1013.8 994.4 DAY 30 15 9 3 2 25 7 1 4 9 15 18 MEAN QNH PRESSURE IN HPA 1017.4 1018.1 1014.1 1010.6 1006.5 1000.8 997.8 1001.5 1007.1 1013.0 1016.0 1018.9 1010.2 MAX. QNH PRESSURE IN HPA 1022.9 1023.4 1017.9 1012.8 1010.8 1006.9 1002.4 1005.0 1011.9 1018.8 1020.0 1027.3 1027.3 DAY 9 25 16 28 25 5 21 30 28 28 23 27 MIN. QNH PRESSURE IN HPA 1009.1 1012.4 1010.8 1007.5 1003.6 997.1 994.7 997.1 999.8 1009.6 1012.8 1014.1 994.7 DAY 30 15 9 3 2 25 7 1 4 9 15 18 MEAN QFF PRESSURE IN HPA 1017.7 1018.4 1014.4 1010.9 1006.8 1001.0 998.1 1001.8 1007.4 1013.3 1016.3 1019.2 1010.4 MAX. QFF PRESSURE IN HPA 1023.2 1023.7 1018.2 1013.1 1011.1 1007.2 1002.7 1005.3 1012.2 1019.1 1020.3 1027.6 1027.6 DAY 9 25 16 28 25 5 21 30 28 28 23 27 MIN. QFF PRESSURE IN HPA 1009.4 1012.7 1011.1 1007.8 1003.9 997.4 995.0 997.4 1000.1 1009.9 1013.1 1014.4 995.0 DAY 30 15 9 3 2 25 7 1 4 9 15 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1018.2 1019.4 1015.3 1011.9 1007.3 1001.0 998.4 1002.2 1008.3 1013.9 1017.0 1020.1 1011.1 MAX. QFE PRESSURE IN HPA 1022.9 1025.2 1019.6 1014.0 1012.4 1005.9 1004.5 1005.6 1012.8 1019.8 1021.1 1028.7 1028.7 DAY 5 25 16 28 25 2 21 15 28 28 23 27 MIN. QFE PRESSURE IN HPA 1010.5 1013.4 1012.6 1009.8 1004.1 996.5 995.4 997.6 1002.1 1010.6 1014.0 1015.9 995.4 DAY 30 15 25 15 2 30 7 1 4 17 15 18 MEAN QNH PRESSURE IN HPA 1018.6 1019.7 1015.6 1012.2 1007.6 1001.4 998.7 1002.5 1008.6 1014.2 1017.4 1020.4 1011.4 MAX. QNH PRESSURE IN HPA 1023.2 1025.5 1019.9 1014.3 1012.7 1006.2 1004.8 1005.9 1013.1 1020.1 1021.4 1029.0 1029.0 DAY 5 25 16 28 25 2 21 15 28 28 23 27 MIN. QNH PRESSURE IN HPA 1010.8 1013.7 1012.9 1010.1 1004.4 996.8 995.7 997.9 1002.4 1010.9 1014.3 1016.2 995.7 DAY 30 15 25 15 2 30 7 1 4 17 15 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 1016.6 1017.5 1014.0 1010.9 1006.3 1000.5 997.5 1001.3 1006.9 1012.0 1015.0 1018.2 1009.7 MAX. QFE PRESSURE IN HPA 1021.9 1023.1 1019.9 1013.4 1011.6 1005.9 1001.8 1005.1 1011.1 1017.4 1019.3 1026.6 1026.6 DAY 1 25 15 11 25 2 21 30 28 28 23 27 MIN. QFE PRESSURE IN HPA 1009.8 1011.0 1010.9 1007.7 1003.4 996.3 995.1 996.8 1001.1 1008.6 1011.5 1013.7 995.1 DAY 30 15 2 3 2 30 6 6 4 17 15 18 MEAN QNH PRESSURE IN HPA 1016.9 1017.8 1014.3 1011.2 1006.7 1000.8 997.8 1001.6 1007.2 1012.3 1015.3 1018.5 1010.0 MAX. QNH PRESSURE IN HPA 1022.2 1023.4 1020.2 1013.7 1011.9 1006.2 1002.1 1005.4 1011.4 1017.7 1019.6 1026.9 1026.9 DAY 1 25 15 11 25 2 21 30 28 28 23 27 MIN. QNH PRESSURE IN HPA 1010.1 1011.3 1011.2 1008.0 1003.7 996.6 995.4 997.1 1001.4 1008.9 1011.8 1014.0 995.4 DAY 30 15 2 3 2 30 6 6 4 17 15 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 1015.6 1015.9 1012.5 1009.1 1004.9 998.7 995.8 999.5 1005.1 1010.7 1013.8 1016.8 1008.2 MAX. QFE PRESSURE IN HPA 1020.7 1021.8 1018.2 1011.8 1010.4 1004.1 999.8 1003.7 1009.7 1016.1 1017.7 1024.6 1024.6 DAY 1 25 15 11 25 2 21 30 30 28 23 27 MIN. QFE PRESSURE IN HPA 1008.5 1010.5 1009.5 1005.4 1001.5 994.0 993.1 994.3 999.5 1007.7 1010.5 1012.6 993.1 DAY 30 15 2 3 2 29 3 5 4 16 15 18 MEAN QNH PRESSURE IN HPA 1015.9 1016.2 1012.8 1009.4 1005.2 999.0 996.2 999.9 1005.4 1011.0 1014.2 1017.1 1008.5 MAX. QNH PRESSURE IN HPA 1021.0 1022.1 1018.5 1012.1 1010.7 1004.4 1000.1 1004.0 1010.0 1016.4 1018.0 1024.9 1024.9 DAY 1 25 15 11 25 2 21 30 30 28 23 27 MIN. QNH PRESSURE IN HPA 1008.8 1010.8 1009.8 1005.7 1001.8 994.3 993.4 994.6 999.8 1008.0 1010.8 1012.9 993.4 DAY 30 15 2 3 2 29 3 5 4 16 15 18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 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 1016.1 1016.5 1013.0 1009.4 1005.0 998.6 995.9 999.8 1005.6 1011.1 1014.5 1017.5 1008.6 MAX. QFE PRESSURE IN HPA 1019.9 1021.9 1018.9 1011.9 1010.0 1004.0 999.8 1003.7 1010.4 1016.4 1019.0 1025.1 1025.1 DAY 1 24 15 11 25 2 21 29 28 26 30 27 MIN. QFE PRESSURE IN HPA 1009.8 1011.1 1009.7 1006.5 1002.3 994.2 993.0 994.5 999.5 1008.0 1011.2 1013.7 993.0 DAY 29 15 25 3 28 29 3 5 4 16 16 17 MEAN QNH PRESSURE IN HPA 1016.4 1016.8 1013.4 1009.8 1005.3 998.9 996.2 1000.1 1005.9 1011.4 1014.8 1017.9 1008.9 MAX. QNH PRESSURE IN HPA 1020.2 1022.2 1019.2 1012.2 1010.3 1004.3 1000.1 1004.0 1010.7 1016.7 1019.3 1025.4 1025.4 DAY 1 24 15 11 25 2 21 29 28 26 30 27 MIN. QNH PRESSURE IN HPA 1010.1 1011.4 1010.0 1006.8 1002.6 994.5 993.3 994.8 999.8 1008.3 1011.5 1014.0 993.3 DAY 29 15 25 3 28 29 3 5 4 16 16 17 MEAN QFF PRESSURE IN HPA 1016.7 1017.1 1013.6 1010.0 1005.6 999.1 996.4 1000.3 1006.2 1011.6 1015.1 1018.1 1009.2 MAX. QFF PRESSURE IN HPA 1020.5 1022.5 1019.5 1012.5 1010.6 1004.6 1000.4 1004.3 1011.0 1017.0 1019.6 1025.7 1025.7 DAY 1 24 15 11 25 2 21 29 30 27 30 27 MIN. QFF PRESSURE IN HPA 1010.4 1011.7 1010.3 1007.1 1002.9 994.8 993.6 995.1 1000.1 1008.6 1011.8 1014.3 993.6 DAY 29 15 25 3 28 29 3 5 4 16 16 17 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 JASK (40893) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 25 38 N LONGITUDE 57 46 E DATA PROCESSING CENTER ELEVATION 5.2 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 18.1 21.7 24.2 27.9 31.1 31.6 31.8 30.9 29.0 28.5 24.5 22.2 26.8 MINIMUN AIR TEMPERATURE (C) 13.0 17.2 20.0 23.6 26.8 28.8 29.6 28.7 26.1 23.5 19.4 16.7 22.8 DAYS WITH MINIMUM TEMP. >=21 0 0 16 28 31 30 31 31 30 27 7 0 231 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) 7.0 15.0 16.0 20.0 24.0 27.0 26.0 27.0 25.0 19.0 17.0 13.0 7.0 DAY 5 3 11 15 3 1 20 29 12 30 13 16 MAXIMUM AIR TEMPERATURE (C) 21.1 24.4 27.0 31.6 34.3 33.8 33.8 32.8 30.8 32.0 27.9 25.3 29.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 6 22 30 30 31 31 27 30 5 0 212 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 28.0 32.0 39.0 38.0 38.0 36.0 34.0 35.0 37.0 31.0 27.0 39.0 DAY 1 26 28 30 8 14 10 1 30 7 3 4 DIF. BETWEEN (MAX.-MIN.) (C) 8.1 7.2 7.0 8.0 7.5 5.0 4.2 4.1 4.7 8.5 8.5 8.6 6.8 MEAN DAILY TEMP. (MDT) (C) 17.0 20.8 23.5 27.6 30.5 31.3 31.7 30.8 28.4 27.8 23.6 21.0 26.2 COOLING DEG. DAYS(BASE 21 0C) 0.5 14.5 78.0 198.0 295.5 309.5 331.0 303.5 223.5 209.5 79.5 12.5 2055.5 HEATING DEG. DAYS(BASE 18 0C) 47.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 47.0 DEWPOINT (MEAN C) 8.1 15.0 15.6 18.6 22.8 26.3 26.6 26.1 24.4 20.1 15.1 10.6 19.1 MIXING RATIO (G/KG) 7.25 11.00 11.85 13.79 18.00 22.30 22.51 21.76 19.61 15.41 11.25 8.62 15.28 VAPOUR PRESSURE (HPA) 11.71 17.62 18.91 21.84 28.19 34.50 34.81 33.78 30.70 24.38 17.99 13.88 24.03 SATURATION DEF. (HPA) 9.47 8.56 11.54 16.23 17.33 12.12 12.26 10.91 9.51 15.01 13.22 13.14 12.44 RELATIVE HUMIDITY (MEAN %) 55 68 62 59 64 75 74 76 77 63 58 51 65 RELATIVE HUMIDITY (MAX. %) 66 79 74 74 78 83 81 84 87 79 71 64 77 RELATIVE HUMIDITY (MIN. %) 46 58 50 45 53 67 68 70 68 50 47 41 55 RELATIVE HUMIDITY (MEAN% 03UTC) 61 76 67 66 73 80 81 84 85 64 68 60 72 RELATIVE HUMIDITY (MEAN% 09UTC) 49 62 57 55 62 72 69 70 71 58 50 44 60 RELATIVE HUMIDITY (MEAN% 15UTC) 60 70 68 63 64 78 76 78 82 72 62 58 69 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.0 0.0 0.0 0.0 0.0 0.0 6.0 0.0 0.0 0.0 0.0 0.0 42.0 DAYS WITH PRECIPITATION >=10 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 2 0 0 0 0 0 1 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 1 3 0 0 0 0 0 2 0 0 0 0 0 5 DAYS WITH PRECIPITATION 3 0 0 0 0 0 2 0 0 0 0 0 5 GREATEST DAILY PRECIPITATION 23.0 0.0 0.0 0.0 0.0 0.0 5.0 0.0 0.0 0.0 0.0 0.0 23.0 DAY 3 ** ** ** **