STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** 8.1 15.3 20.2 26.7 28.5 26.0 21.4 13.9 9.3 5.7 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** 1.4 6.7 10.7 14.1 17.4 15.8 10.6 5.1 2.8 -2.1 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** 0 0 0 0 4 0 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** 1 0 0 0 0 0 0 0 2 9 **** DAYS WITH FREEZING MIN.<= 0 **** **** 10 0 0 0 0 0 0 1 12 21 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** -4.0 1.5 4.4 9.0 14.0 12.8 6.6 -0.2 -4.0 -8.2 ***** DAY ** ** 24 6 8 5 17 4 30 9 17 13 MAXIMUM AIR TEMPERATURE (C) ***** ***** 12.4 20.4 25.1 32.1 33.7 33.1 30.2 21.6 16.1 14.2 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** 0 0 4 23 31 30 15 0 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** 0 0 0 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** 18.5 26.8 31.6 36.2 36.8 35.8 33.6 28.8 22.2 19.8 ***** DAY ** ** 31 19 27 18 15 15 3 1 3 19 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** 11.0 13.7 14.4 18.0 16.3 17.3 19.6 16.5 13.3 16.3 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** 6.9 13.6 17.9 23.1 25.6 24.4 20.4 13.4 9.4 6.0 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** 0.0 0.0 6.4 71.1 141.2 106.6 16.4 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** 343.2 133.6 43.5 0.0 0.0 0.0 0.9 144.6 256.8 370.8 ****** DEWPOINT (MEAN C) ***** ***** -3.4 -1.4 0.9 -0.6 0.4 1.4 -3.4 -1.3 -3.0 -5.0 ***** MIXING RATIO (G/KG) ****** ****** 3.90 4.46 5.19 4.60 4.98 5.35 3.75 4.39 4.00 3.33 ****** VAPOUR PRESSURE (HPA) ****** ****** 5.06 5.79 6.74 5.97 6.45 6.93 4.88 5.74 5.21 4.35 ****** SATURATION DEF. (HPA) ****** ****** 6.14 12.35 18.12 30.70 33.91 28.38 22.46 11.15 7.27 5.48 ****** RELATIVE HUMIDITY (MEAN %) *** *** 50 36 31 18 18 22 21 38 46 50 *** RELATIVE HUMIDITY (MAX. %) *** *** 74 59 53 33 33 35 37 54 68 73 *** RELATIVE HUMIDITY (MIN. %) *** *** 33 24 20 12 11 13 11 25 26 29 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** 72 57 51 33 33 35 37 52 65 69 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** 42 28 24 14 14 15 13 27 32 33 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** 45 31 27 14 14 16 14 33 37 40 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** 58.0 3.6 13.2 0.0 0.8 0.7 0.0 0.1 21.3 0.5 ****** DAYS WITH PRECIPITATION >=10 **** **** 2 0 1 0 0 0 0 0 1 0 **** DAYS WITH PRECIPITATION >= 5 **** **** 4 0 1 0 0 0 0 0 2 0 **** DAYS WITH PRECIPITATION >= 1 **** **** 6 1 2 0 0 0 0 0 4 0 **** DAYS WITH PRECIPITATION **** **** 14 4 7 1 1 1 0 2 5 1 **** GREATEST DAILY PRECIPITATION ****** ****** 25.0 2.0 11.0 0.0 0.8 0.7 0.0 0.1 11.0 0.5 ****** DAY ** ** 9 27 6 ** 31 25 ** 26 12 25 DAY WITH THUNDER STORM **** **** 0 0 0 0 1 0 0 0 1 0 **** DAYS WITH SNOW OR SLEET **** **** 1 0 0 0 0 0 0 0 0 0 **** DAYS WITH DUST **** **** 1 3 1 1 1 1 0 0 0 0 **** WIND DIRECTION (PREVAILING) *** *** 270 270 270 45 45 45 45 45 225 225 *** PREVAILING WIND SPEED(KNOTS) **** **** 9.9 11.3 12.6 9.6 10.1 9.7 8.5 7.8 13.3 10.7 **** PREVAILING WIND PERCENT ***** ***** 15.5 26.0 18.1 18.0 30.3 23.3 17.1 13.3 21.3 10.1 ***** CALMS PERCENT OF WIND ***** ***** 37.4 31.3 30.3 37.3 36.8 42.6 57.5 60.5 52.1 73.8 ***** NO. OF WIND OBSERVATION **** **** 155 150 155 150 155 223 240 248 240 248 1964 VECTOR WIND DIRECTION (MEAN) *** *** 229 252 254 317 39 22 37 336 233 249 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** 2.6 4.6 3.6 1.1 3.9 3.0 1.8 0.7 3.3 1.0 **** WIND STEADINESES (MEAN %) ***** ***** 44.1 68.7 50.0 16.9 61.9 53.6 51.4 21.9 63.5 43.5 ***** WIND SPEED (MEAN KNOTS) **** **** 5.9 6.7 7.2 6.5 6.3 5.6 3.5 3.2 5.2 2.3 **** FASTEST WIND DIRECTION *** *** 190 260 270 240 360 280 250 210 250 220 *** FASTEST WIND SPEED (KNOTS) *** *** 35 29 35 29 27 27 19 25 29 23 *** DAY ** ** 8 21 20 4 16 27 27 30 6 4 DAYS WITH SKY CLEAR (0-2)/8 **** **** 13 11 11 29 26 23 30 17 14 17 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** 10 13 15 1 5 8 0 14 15 14 **** DAYS WITH CLOUDY (7-8)/8 **** **** 8 6 5 0 0 0 0 0 1 0 **** DAYS WITH VISIBILITY =< 2 KM **** **** 1 1 0 0 1 1 0 0 1 0 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** 310.8 ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** 813.6 814.4 815.1 812.8 812.0 813.6 815.2 819.6 816.7 817.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** 821.6 821.6 818.2 819.2 817.3 818.8 820.8 825.2 821.8 824.9 ****** DAY-HOUR **-** **-** 31- 6 18- 6 19- 3 23- 6 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QFE PRESSURE IN HPA ****** ****** 807.3 808.7 810.0 808.4 806.2 806.7 810.4 813.8 810.0 810.0 ****** DAY-HOUR **-** **-** 12- 9 13-12 31-12 25-15 13-12 12-15 3-15 3-12 14- 3 4-12 MEAN QNH PRESSURE IN HPA ****** ****** 1016.9 1017.8 1018.6 1015.9 1014.9 1016.9 1018.8 1024.0 1020.6 1021.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1026.5 1026.5 1022.4 1023.6 1021.3 1023.1 1025.5 1030.8 1026.7 1030.4 ****** DAY-HOUR **-** **-** 31- 6 18- 6 19- 3 23- 6 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QNH PRESSURE IN HPA ****** ****** 1009.3 1011.0 1012.6 1010.6 1008.0 1008.6 1013.0 1017.1 1012.6 1012.6 ****** DAY-HOUR **-** **-** 12- 9 13-12 31-12 25-15 13-12 12-15 3-15 3-12 14- 3 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.5 1004.7 1015.4 1015.3 1019.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.0 1013.4 1024.2 1025.4 1030.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 31- 3 23- 3 9- 3 30- 6 27- 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 991.6 996.6 1004.4 1004.7 1008.2 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 12-21 3-12 3-12 11- 0 3- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.4 815.2 819.5 816.4 817.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 817.4 818.8 823.5 820.8 823.9 ****** DAY ** ** ** ** ** ** ** 31 24 18 21 27 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.5 812.3 816.0 810.4 811.6 ****** DAY ** ** ** ** ** ** ** 13 29 3 14 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1016.6 1018.8 1023.9 1020.3 1021.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1021.4 1023.1 1028.7 1025.5 1029.2 ****** DAY ** ** ** ** ** ** ** 31 24 18 21 27 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.8 1015.3 1019.7 1013.0 1014.5 ****** DAY ** ** ** ** ** ** ** 13 29 3 14 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.2 1004.6 1014.9 1014.4 1018.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.8 1010.3 1020.7 1021.0 1028.1 ****** DAY ** ** ** ** ** ** ** 31 24 9 23 27 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 992.6 999.1 1007.1 1004.7 1008.8 ****** DAY ** ** ** ** ** ** ** 13 4 3 11 3 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 814.1 815.1 815.7 813.8 812.9 814.6 816.0 820.2 817.0 818.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** 820.6 821.0 818.2 819.1 817.1 817.7 819.5 824.4 821.0 823.9 ****** DAY ** ** 31 17 19 23 27 31 23 17 21 27 MIN. QFE PRESSURE IN HPA ****** ****** 807.4 810.1 811.9 811.1 808.7 810.1 812.8 816.8 810.0 812.4 ****** DAY ** ** 12 13 7 26 12 13 29 4 14 5 MEAN QNH PRESSURE IN HPA ****** ****** 1017.5 1018.7 1019.4 1017.1 1016.0 1018.1 1019.7 1024.8 1020.9 1022.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1025.3 1025.7 1022.4 1023.5 1021.1 1021.8 1023.9 1029.8 1025.7 1029.2 ****** DAY ** ** 31 17 19 23 27 31 23 17 21 27 MIN. QNH PRESSURE IN HPA ****** ****** 1009.4 1012.7 1014.8 1013.9 1011.0 1012.7 1015.9 1020.7 1012.6 1015.4 ****** DAY ** ** 12 13 7 26 12 13 29 4 14 5 MEAN QFF PRESSURE IN HPA ****** ****** 1015.1 1011.0 1008.1 1001.4 999.1 1002.2 1007.3 1018.0 1016.7 1021.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1022.2 1018.7 1013.2 1008.5 1005.3 1007.0 1013.4 1024.2 1024.2 1030.2 ****** DAY ** ** 17 1 15 23 28 31 23 9 30 27 MIN. QFF PRESSURE IN HPA ****** ****** 1006.7 1004.1 1002.0 997.5 993.3 994.3 1001.6 1011.1 1005.8 1011.2 ****** DAY ** ** 12 26 29 13 10 13 4 3 11 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 814.6 815.5 815.9 814.0 813.1 815.0 816.8 821.1 817.8 819.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** 821.6 821.6 818.1 819.2 817.3 818.8 820.8 825.2 821.8 824.9 ****** DAY ** ** 31 18 15 23 27 31 23 17 21 26 MIN. QFE PRESSURE IN HPA ****** ****** 808.0 810.6 811.3 811.4 808.9 810.8 813.5 817.4 811.8 813.3 ****** DAY ** ** 12 13 7 13 13 12 29 3 14 5 MEAN QNH PRESSURE IN HPA ****** ****** 1018.1 1019.2 1019.7 1017.4 1016.3 1018.6 1020.7 1025.9 1021.9 1023.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1026.5 1026.5 1022.3 1023.6 1021.3 1023.1 1025.5 1030.8 1026.7 1030.4 ****** DAY ** ** 31 18 15 23 27 31 23 17 21 26 MIN. QNH PRESSURE IN HPA ****** ****** 1010.2 1013.3 1014.1 1014.2 1011.2 1013.5 1016.8 1021.4 1014.7 1016.5 ****** DAY ** ** 12 13 7 13 13 12 29 3 14 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.3 1006.1 1016.8 1016.7 1022.1 ****** MAX. 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QNH PRESSURE IN HPA ****** ****** 1009.3 1011.8 1013.5 1012.7 1009.4 1012.3 1015.9 1019.4 1014.8 1014.2 ****** DAY ** ** 12 13 7 13 13 12 14 3 16 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.8 1004.1 1014.7 1014.4 1018.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.4 1010.7 1020.6 1023.0 1026.5 ****** DAY ** ** ** ** ** ** ** 30 23 17 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.2 998.1 1005.3 1006.9 1008.2 ****** DAY ** ** ** ** ** ** ** 13 14 3 13 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 812.8 813.3 814.1 811.6 811.0 812.6 814.0 818.3 815.7 816.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** 818.8 818.5 816.9 816.4 815.8 816.1 818.2 822.2 819.1 822.4 ****** DAY ** ** 31 16 10 23 27 30 23 17 21 26 MIN. QFE PRESSURE IN HPA ****** ****** 807.4 808.7 810.0 808.9 806.2 807.5 811.0 813.8 811.7 810.0 ****** DAY ** ** 12 13 31 25 13 12 3 3 13 4 MEAN QNH PRESSURE IN HPA ****** ****** 1015.9 1016.6 1017.5 1014.5 1013.8 1015.7 1017.4 1022.6 1019.4 1020.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1023.1 1022.7 1020.8 1020.2 1019.5 1019.9 1022.4 1027.2 1023.5 1027.4 ****** DAY ** ** 31 16 10 23 27 30 23 17 21 26 MIN. QNH PRESSURE IN HPA ****** ****** 1009.4 1011.0 1012.6 1011.2 1008.0 1009.6 1013.8 1017.1 1014.6 1012.6 ****** DAY ** ** 12 13 31 25 13 12 3 3 13 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.9 1003.1 1013.5 1013.7 1017.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.6 1009.8 1018.6 1022.0 1025.5 ****** DAY ** ** ** ** ** ** ** 30 23 22 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 991.8 996.6 1004.4 1004.9 1008.4 ****** DAY ** ** ** ** ** ** ** 12 3 3 10 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 813.0 813.6 814.4 811.6 810.7 812.3 813.8 818.7 816.4 817.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** 819.0 819.1 816.9 816.0 815.0 815.9 818.2 822.5 820.5 823.1 ****** DAY ** ** 30 16 10 22 27 28 23 17 21 26 MIN. QFE PRESSURE IN HPA ****** ****** 807.9 809.2 811.0 808.4 806.6 806.7 810.4 814.1 811.8 810.3 ****** DAY ** ** 21 26 31 25 9 12 3 3 13 4 MEAN QNH PRESSURE IN HPA ****** ****** 1016.2 1016.9 1017.8 1014.5 1013.5 1015.4 1017.2 1022.9 1020.3 1021.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1023.3 1023.5 1020.8 1019.7 1018.6 1019.6 1022.4 1027.5 1025.1 1028.3 ****** DAY ** ** 30 16 10 22 27 28 23 17 21 26 MIN. QNH PRESSURE IN HPA ****** ****** 1010.0 1011.6 1013.8 1010.6 1008.5 1008.6 1013.0 1017.5 1014.7 1012.9 ****** DAY ** ** 21 26 31 25 9 12 3 3 13 4 MEAN QFF PRESSURE IN HPA ****** ****** 1013.6 1009.1 1006.4 998.8 996.6 999.4 1004.7 1016.0 1016.2 1020.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1020.5 1015.3 1013.0 1004.7 1002.4 1005.2 1011.8 1021.3 1024.7 1028.7 ****** DAY ** ** 23 16 5 22 27 30 23 21 30 26 MIN. QFF PRESSURE IN HPA ****** ****** 1006.6 1002.8 999.7 994.6 989.5 992.7 998.7 1007.6 1006.8 1011.2 ****** DAY ** ** 8 26 31 25 9 13 3 3 10 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.4 815.1 819.7 816.9 818.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 817.3 819.1 823.6 820.4 823.8 ****** DAY ** ** ** ** ** ** ** 28 23 17 20 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.1 811.7 815.9 811.6 811.4 ****** DAY ** ** ** ** ** ** ** 12 3 3 13 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1016.6 1018.7 1024.2 1020.8 1022.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1021.3 1023.5 1028.9 1025.0 1029.1 ****** DAY ** ** ** ** ** ** ** 28 23 17 20 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.3 1014.6 1019.6 1014.5 1014.2 ****** DAY ** ** ** ** ** ** ** 12 3 3 13 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.6 1004.2 1015.1 1015.8 1020.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.2 1010.5 1021.0 1024.8 1029.0 ****** DAY ** ** ** ** ** ** ** 28 23 21 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 992.4 998.4 1006.3 1005.9 1011.0 ****** DAY ** ** ** ** ** ** ** 12 3 2 10 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.7 815.4 819.7 816.7 817.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 817.6 818.9 823.5 820.6 823.8 ****** DAY ** ** ** ** ** ** ** 30 23 16 20 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.4 812.2 816.1 811.5 811.4 ****** DAY ** ** ** ** ** ** ** 12 3 3 13 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1017.0 1019.0 1024.1 1020.6 1021.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1021.7 1023.2 1028.7 1025.3 1029.1 ****** DAY ** ** ** ** ** ** ** 30 23 16 20 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.6 1015.2 1019.9 1014.4 1014.2 ****** DAY ** ** ** ** ** ** ** 12 3 3 13 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.7 1004.0 1014.7 1014.7 1018.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.8 1009.5 1020.5 1023.7 1027.3 ****** DAY ** ** ** ** ** ** ** 30 18 8 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 991.6 997.9 1005.9 1005.2 1009.3 ****** DAY ** ** ** ** ** ** ** 12 3 2 10 2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.0 5.5 10.3 16.4 20.8 27.1 30.7 29.7 20.8 15.5 11.7 4.2 16.5 MINIMUN AIR TEMPERATURE (C) -3.2 -4.0 1.4 7.5 11.4 14.1 19.9 17.3 9.4 6.6 3.9 -3.7 6.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 10 5 0 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 15 18 0 0 0 0 0 0 0 0 0 18 51 DAYS WITH FREEZING MIN.<= 0 24 27 10 0 0 0 0 0 0 0 8 24 93 TEMPERATURE RECORDS LOWEST(C) -11.6 -9.6 -3.6 1.2 6.2 10.4 16.0 12.8 2.8 0.6 -2.6 -10.6 -11.6 DAY 11 21 6 6 7 6 1 23 23 13 12 8 MAXIMUM AIR TEMPERATURE (C) 10.2 11.2 15.7 21.7 25.9 33.0 36.3 36.0 26.6 20.9 16.6 9.3 22.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 27 31 31 4 0 0 0 96 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 17.6 17.6 22.2 27.2 31.4 36.6 39.0 38.8 33.6 26.6 21.4 16.4 39.0 DAY 1 28 30 28 31 25 25 6 3 1 4 29 DIF. BETWEEN (MAX.-MIN.) (C) 13.4 15.2 14.3 14.2 14.5 18.9 16.4 18.7 17.2 14.3 12.7 13.0 15.3 MEAN DAILY TEMP. (MDT) (C) 3.5 3.6 8.5 14.6 18.7 23.5 28.1 26.6 18.0 13.7 10.2 2.8 14.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 7.9 78.1 220.6 175.1 12.0 0.0 0.0 0.0 493.8 HEATING DEG. DAYS(BASE 18 0C) 449.9 401.9 293.6 108.7 17.1 0.0 0.0 0.0 38.6 133.1 232.6 470.3 2145.8 DEWPOINT (MEAN C) -4.6 -6.8 -4.0 1.2 1.8 -1.1 2.1 -1.4 -4.1 1.3 1.2 -9.0 -1.9 MIXING RATIO (G/KG) 3.45 2.94 3.68 5.36 5.54 4.55 5.74 4.40 3.74 5.45 5.39 2.57 4.40 VAPOUR PRESSURE (HPA) 4.49 3.82 4.78 6.96 7.20 5.89 7.39 5.69 4.87 7.11 7.01 3.36 5.71 SATURATION DEF. (HPA) 4.89 5.71 8.42 12.70 18.49 31.80 38.56 38.22 21.19 11.29 7.34 5.52 17.01 RELATIVE HUMIDITY (MEAN %) 54 46 42 40 31 18 18 15 21 43 53 43 35 RELATIVE HUMIDITY (MAX. %) 78 70 68 67 50 32 31 27 34 70 74 69 56 RELATIVE HUMIDITY (MIN. %) 36 29 27 25 22 11 11 9 14 26 38 24 23 RELATIVE HUMIDITY (MEAN% 03UTC) 74 67 67 64 49 32 31 27 34 68 72 65 54 RELATIVE HUMIDITY (MEAN% 09UTC) 42 37 33 30 24 14 14 11 16 32 43 30 27 RELATIVE HUMIDITY (MEAN% 15UTC) 49 39 34 36 28 13 13 11 17 40 52 42 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.7 9.2 22.4 12.2 7.0 0.0 0.0 0.0 0.0 21.3 70.7 11.9 163.4 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 2 0 3 DAYS WITH PRECIPITATION >= 5 0 1 1 1 0 0 0 0 0 1 3 1 8 DAYS WITH PRECIPITATION >= 1 4 2 4 4 2 0 0 0 0 7 4 3 30 DAYS WITH PRECIPITATION 5 5 7 8 6 0 0 0 0 13 7 7 58 GREATEST DAILY PRECIPITATION 4.0 7.0 16.9 7.0 4.0 0.0 0.0 0.0 0.0 6.0 40.0 7.0 40.0 DAY 24 1 12 2 6 ** ** ** ** 22 17 1 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 4 1 0 5 DAYS WITH SNOW OR SLEET 1 2 2 0 0 0 0 0 0 0 0 0 5 DAYS WITH DUST 0 2 2 1 4 1 2 0 1 0 0 1 14 WIND DIRECTION (PREVAILING) 225 270 225 225 225 270 45 45 45 45 180 225 45 PREVAILING WIND SPEED(KNOTS) 11.4 11.9 13.9 9.1 12.0 9.6 7.1 6.8 6.8 7.1 15.0 13.2 6.5 PREVAILING WIND PERCENT 10.3 13.6 14.8 15.3 15.5 18.7 30.3 28.4 26.7 14.2 17.3 18.7 12.1 CALMS PERCENT OF WIND 61.3 53.6 46.5 49.3 43.2 44.0 46.5 49.0 57.3 61.9 52.7 54.2 51.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 237 233 236 243 244 262 44 42 49 343 203 233 242 VECTOR WIND MAGNITUDE(KNOTS) 2.3 3.4 2.8 1.7 3.2 2.2 2.7 2.8 2.3 0.8 4.1 3.1 1.2 WIND STEADINESES (MEAN %) 62.2 66.7 58.3 41.5 62.7 46.8 75.0 80.0 85.2 25.0 75.9 64.6 28.6 WIND SPEED (MEAN KNOTS) 3.7 5.1 4.8 4.1 5.1 4.7 3.6 3.5 2.7 3.2 5.4 4.8 4.2 FASTEST WIND DIRECTION 190 240 210 240 250 210 30 300 60 310 180 260 210 FASTEST WIND SPEED (KNOTS) 27 31 37 29 25 23 19 25 17 31 25 29 37 DAY 16 3 7 2 6 4 29 8 5 19 5 16 DAYS WITH SKY CLEAR (0-2)/8 14 18 16 14 20 29 23 28 26 20 11 20 239 DAYS WITH P.CLOUDY (3-6)/8 14 10 13 11 11 1 8 3 4 11 13 10 109 DAYS WITH CLOUDY (7-8)/8 3 0 2 5 0 0 0 0 0 0 6 1 17 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 0 0 0 0 0 0 1 0 3 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** 305.3 374.6 337.2 354.4 310.3 268.8 183.6 247.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 815.3 812.4 813.6 815.4 814.7 810.4 808.6 810.7 817.2 819.1 816.9 816.2 814.2 MAX. QFE PRESSURE IN HPA 823.1 819.0 819.8 821.2 819.8 815.4 812.8 815.2 824.8 824.7 823.6 820.9 824.8 DAY-HOUR 10- 6 20- 6 18- 6 5- 6 15- 3 9- 6 3- 6 22- 6 23- 6 10- 6 2- 6 28- 6 MIN. QFE PRESSURE IN HPA 804.3 805.0 805.0 809.0 808.8 805.2 804.6 805.6 809.4 814.5 809.4 805.0 804.3 DAY-HOUR 16-12 12- 3 12- 3 3-12 1-12 28-15 7-15 1-15 4-12 3-12 26- 3 4- 3 MEAN QNH PRESSURE IN HPA 1018.9 1015.4 1016.9 1019.0 1018.2 1013.0 1010.9 1013.4 1021.2 1023.5 1020.8 1019.9 1017.6 MAX. QNH PRESSURE IN HPA 1028.3 1023.3 1024.3 1026.0 1024.3 1019.0 1015.9 1018.8 1030.3 1030.2 1028.9 1025.6 1030.3 DAY-HOUR 10- 6 20- 6 18- 6 5- 6 15- 3 9- 6 3- 6 22- 6 23- 6 10- 6 2- 6 28- 6 MIN. QNH PRESSURE IN HPA 1005.7 1006.6 1006.6 1011.4 1011.1 1006.8 1006.1 1007.3 1011.8 1018.0 1011.8 1006.6 1005.7 DAY-HOUR 16-12 12- 3 12- 3 3-12 1-12 28-15 7-15 1-15 4-12 3-12 26- 3 4- 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 815.7 812.7 814.0 816.1 815.4 811.5 809.7 811.7 818.0 819.7 817.2 816.2 814.8 MAX. QFE PRESSURE IN HPA 822.7 817.7 818.6 820.1 819.8 815.1 812.7 814.8 824.1 823.9 822.2 820.2 824.1 DAY 10 20 18 29 15 9 3 23 23 10 2 8 MIN. QFE PRESSURE IN HPA 809.0 805.0 805.0 810.6 810.0 807.3 807.2 808.4 812.1 816.6 809.4 805.0 805.0 DAY 26 12 12 3 1 29 8 1 1 3 26 4 MEAN QNH PRESSURE IN HPA 1019.4 1015.8 1017.3 1019.9 1019.0 1014.3 1012.2 1014.6 1022.1 1024.2 1021.2 1020.0 1018.3 MAX. QNH PRESSURE IN HPA 1027.8 1021.8 1022.9 1024.7 1024.3 1018.7 1015.8 1018.3 1029.5 1029.2 1027.2 1024.8 1029.5 DAY 10 20 18 29 15 9 3 23 23 10 2 8 MIN. QNH PRESSURE IN HPA 1011.4 1006.6 1006.6 1013.3 1012.6 1009.3 1009.2 1010.6 1015.1 1020.5 1011.8 1006.6 1006.6 DAY 26 12 12 3 1 29 8 1 1 3 26 4 MEAN QFF PRESSURE IN HPA 1019.7 1015.8 1013.6 1011.6 1007.4 998.6 993.4 997.3 1011.4 1016.9 1016.2 1021.4 1010.3 MAX. QFF PRESSURE IN HPA 1033.0 1026.1 1022.5 1021.4 1013.5 1004.4 998.4 1003.3 1023.6 1024.2 1023.7 1033.5 1033.5 DAY 10 20 18 6 15 9 3 23 23 10 20 8 MIN. QFF PRESSURE IN HPA 1008.1 1001.8 1002.0 1004.4 1001.9 993.0 989.5 992.4 1000.1 1010.3 1008.5 1004.5 989.5 DAY 16 1 12 27 1 22 8 1 1 3 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 816.6 813.6 814.8 816.7 815.8 811.7 809.9 812.2 818.6 820.5 818.1 817.3 815.5 MAX. QFE PRESSURE IN HPA 823.1 819.0 819.8 821.2 819.6 815.4 812.8 815.2 824.8 824.7 823.6 820.9 824.8 DAY 10 20 18 5 15 9 3 22 23 10 2 28 MIN. QFE PRESSURE IN HPA 809.5 806.4 806.6 811.3 810.3 807.4 807.4 808.4 812.8 817.0 811.7 806.2 806.2 DAY 16 12 12 3 1 29 8 2 1 3 26 4 MEAN QNH PRESSURE IN HPA 1020.5 1016.9 1018.4 1020.5 1019.5 1014.6 1012.5 1015.2 1022.9 1025.1 1022.2 1021.3 1019.1 MAX. QNH PRESSURE IN HPA 1028.3 1023.3 1024.3 1026.0 1024.1 1019.0 1015.9 1018.8 1030.3 1030.2 1028.9 1025.6 1030.3 DAY 10 20 18 5 15 9 3 22 23 10 2 28 MIN. QNH PRESSURE IN HPA 1012.0 1008.2 1008.5 1014.1 1012.9 1009.4 1009.4 1010.6 1015.9 1020.9 1014.6 1008.0 1008.0 DAY 16 12 12 3 1 29 8 2 1 3 26 4 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 815.2 812.5 813.9 815.5 814.8 810.6 808.9 811.1 817.5 819.1 816.8 816.1 814.3 MAX. QFE PRESSURE IN HPA 821.8 818.1 818.7 820.6 818.8 814.9 811.7 814.6 824.0 823.4 822.3 819.8 824.0 DAY 10 20 18 5 15 9 3 23 23 10 2 28 MIN. QFE PRESSURE IN HPA 805.5 806.1 806.6 810.2 809.1 806.4 806.6 807.9 811.8 815.9 811.1 805.3 805.3 DAY 16 12 12 3 1 29 8 2 1 3 26 4 MEAN QNH PRESSURE IN HPA 1018.8 1015.5 1017.2 1019.2 1018.3 1013.3 1011.2 1013.9 1021.6 1023.5 1020.7 1019.9 1017.8 MAX. QNH PRESSURE IN HPA 1026.7 1022.3 1023.0 1025.3 1023.1 1018.4 1014.6 1018.1 1029.3 1028.6 1027.3 1024.3 1029.3 DAY 10 20 18 5 15 9 3 23 23 10 2 28 MIN. QNH PRESSURE IN HPA 1007.2 1007.9 1008.5 1012.8 1011.5 1008.2 1008.5 1010.0 1014.7 1019.6 1013.9 1006.9 1006.9 DAY 16 12 12 3 1 29 8 2 1 3 26 4 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 814.2 811.3 812.6 814.2 813.8 809.3 807.5 809.5 815.9 817.9 816.0 815.2 813.1 MAX. QFE PRESSURE IN HPA 820.4 816.7 817.2 819.8 817.8 813.4 810.5 813.0 822.8 821.8 820.9 818.7 822.8 DAY 9 20 18 5 15 8 13 22 23 10 2 28 MIN. QFE PRESSURE IN HPA 804.3 806.7 805.1 809.0 808.8 805.3 805.0 806.5 809.4 814.5 810.8 805.1 804.3 DAY 16 12 12 3 1 28 7 1 4 3 26 4 MEAN QNH PRESSURE IN HPA 1017.6 1014.1 1015.6 1017.6 1017.1 1011.7 1009.5 1011.9 1019.7 1022.1 1019.8 1018.8 1016.3 MAX. QNH PRESSURE IN HPA 1025.0 1020.6 1021.2 1024.3 1021.9 1016.6 1013.2 1016.2 1027.9 1026.7 1025.6 1023.0 1027.9 DAY 9 20 18 5 15 8 13 22 23 10 2 28 MIN. QNH PRESSURE IN HPA 1005.7 1008.6 1006.7 1011.4 1011.1 1006.9 1006.6 1008.4 1011.8 1018.0 1013.5 1006.7 1005.7 DAY 16 12 12 3 1 28 7 1 4 3 26 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 814.9 812.0 812.9 814.4 813.9 809.1 807.2 809.1 816.0 818.4 816.5 815.9 813.4 MAX. QFE PRESSURE IN HPA 821.4 817.1 817.6 820.1 817.5 813.0 810.4 812.5 822.8 822.0 821.6 819.4 822.8 DAY 9 20 31 5 14 9 13 22 23 10 2 30 MIN. QFE PRESSURE IN HPA 806.1 807.8 805.3 809.4 809.5 805.2 804.6 805.6 809.6 814.8 810.5 805.8 804.6 DAY 16 11 12 3 1 28 7 1 4 3 25 4 MEAN QNH PRESSURE IN HPA 1018.4 1015.0 1016.0 1017.9 1017.2 1011.5 1009.2 1011.5 1019.7 1022.6 1020.3 1019.7 1016.6 MAX. QNH PRESSURE IN HPA 1026.2 1021.1 1021.7 1024.7 1021.5 1016.2 1013.0 1015.6 1027.9 1026.9 1026.5 1023.8 1027.9 DAY 9 20 31 5 14 9 13 22 23 10 2 30 MIN. QNH PRESSURE IN HPA 1007.9 1009.9 1006.9 1011.8 1012.0 1006.8 1006.1 1007.3 1012.1 1018.3 1013.2 1007.5 1006.1 DAY 16 11 12 3 1 28 7 1 4 3 25 4 MEAN QFF PRESSURE IN HPA 1018.7 1014.9 1012.1 1009.5 1005.3 995.7 990.5 994.2 1008.9 1015.3 1015.3 1021.0 1008.4 MAX. QFF PRESSURE IN HPA 1029.4 1024.0 1019.9 1020.9 1009.8 1001.8 995.2 1000.4 1022.0 1021.9 1022.5 1031.1 1031.1 DAY 10 20 18 5 14 9 13 22 23 10 20 7 MIN. QFF PRESSURE IN HPA 1004.3 1007.6 1002.2 1003.3 1000.1 990.6 986.1 988.8 996.9 1007.9 1007.9 1003.7 986.1 DAY 16 12 7 30 31 22 7 1 4 2 25 3 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 SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.0 6.1 9.7 15.0 19.5 25.5 30.5 28.7 23.9 16.4 11.4 0.8 16.1 MINIMUN AIR TEMPERATURE (C) -3.4 -1.2 1.5 6.7 10.5 14.6 18.5 15.7 12.1 5.1 0.3 -4.8 6.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 0 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 21 7 1 0 0 0 0 0 0 0 4 18 51 DAYS WITH FREEZING MIN.<= 0 26 16 10 0 0 0 0 0 0 1 14 26 93 TEMPERATURE RECORDS LOWEST(C) -8.6 -6.2 -5.2 1.6 5.4 8.6 14.2 12.4 7.8 0.0 -10.6 -13.8 -13.8 DAY 23 26 1 1 11 1 2 11 23 16 29 15 MAXIMUM AIR TEMPERATURE (C) 11.9 11.0 14.7 20.2 24.5 30.9 36.3 34.4 30.0 22.5 17.3 5.5 21.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 21 31 31 18 0 0 0 101 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 3 3 TEMPERATURE RECORDS HIGHEST(C) 15.0 16.2 20.4 24.0 28.2 35.4 39.2 36.2 32.2 28.2 22.4 12.2 39.2 DAY 16 22 25 30 4 13 12 23 5 3 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 15.3 12.2 13.2 13.5 14.0 16.3 17.8 18.7 17.9 17.4 17.0 10.3 15.3 MEAN DAILY TEMP. (MDT) (C) 4.2 4.9 8.1 13.5 17.5 22.7 27.4 25.1 21.1 13.8 8.8 0.4 14.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 69.3 198.0 126.7 22.6 0.0 0.0 0.0 416.6 HEATING DEG. DAYS(BASE 18 0C) 427.4 365.6 305.9 136.1 29.4 2.8 0.0 0.0 1.2 135.4 275.4 546.8 2226.0 DEWPOINT (MEAN C) -8.0 -7.1 -7.1 -2.5 3.3 3.5 2.9 0.8 0.3 -2.6 -6.8 -4.2 -2.3 MIXING RATIO (G/KG) 2.80 2.96 3.14 4.24 6.26 6.18 5.92 5.08 4.91 4.03 3.00 3.55 4.34 VAPOUR PRESSURE (HPA) 3.65 3.84 4.08 5.51 8.12 7.98 7.62 6.59 6.38 5.27 3.92 4.63 5.63 SATURATION DEF. (HPA) 6.23 5.94 8.52 12.25 15.43 26.24 38.08 34.80 25.04 15.00 10.80 2.20 16.71 RELATIVE HUMIDITY (MEAN %) 43 44 37 35 39 27 19 18 23 32 30 72 35 RELATIVE HUMIDITY (MAX. %) 71 72 63 59 60 49 34 31 37 52 50 85 55 RELATIVE HUMIDITY (MIN. %) 22 26 21 21 27 17 12 12 16 21 19 59 23 RELATIVE HUMIDITY (MEAN% 03UTC) 67 71 62 57 59 48 34 31 37 52 48 82 54 RELATIVE HUMIDITY (MEAN% 09UTC) 31 33 27 28 30 22 15 14 18 25 22 65 28 RELATIVE HUMIDITY (MEAN% 15UTC) 36 36 29 28 36 20 14 14 19 26 25 74 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.4 40.9 17.8 20.4 30.0 23.6 0.0 0.0 0.0 7.0 0.0 39.0 181.1 DAYS WITH PRECIPITATION >=10 0 1 1 0 1 1 0 0 0 0 0 2 6 DAYS WITH PRECIPITATION >= 5 0 2 1 1 3 1 0 0 0 1 0 3 12 DAYS WITH PRECIPITATION >= 1 1 3 2 4 7 1 0 0 0 2 0 3 23 DAYS WITH PRECIPITATION 3 5 6 7 8 4 0 0 0 2 0 6 41 GREATEST DAILY PRECIPITATION 2.0 28.0 15.0 8.0 11.0 22.0 0.0 0.0 0.0 5.0 0.0 15.0 28.0 DAY 13 6 14 13 29 1 ** ** ** 22 ** 12 DAY WITH THUNDER STORM 0 0 0 2 6 0 0 0 0 1 0 0 9 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 2 3 DAYS WITH DUST 0 0 0 3 2 0 0 0 1 0 0 0 6 WIND DIRECTION (PREVAILING) 225 225 270 225 225 225 45 45 270 45 225 45 225 PREVAILING WIND SPEED(KNOTS) 13.4 13.8 12.8 13.6 13.9 12.3 8.1 7.2 13.3 8.9 15.0 6.6 13.5 PREVAILING WIND PERCENT 10.3 8.6 14.2 16.7 12.9 12.0 11.6 23.9 13.3 13.5 12.7 4.5 9.2 CALMS PERCENT OF WIND 69.0 57.9 54.2 45.3 49.7 56.0 54.2 54.2 50.7 58.7 61.3 89.7 58.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 237 235 258 244 245 260 270 45 284 287 249 356 256 VECTOR WIND MAGNITUDE(KNOTS) 2.7 1.6 2.5 3.7 2.9 1.4 0.1 2.7 1.9 0.3 3.0 0.4 1.4 WIND STEADINESES (MEAN %) 73.0 41.0 51.0 60.7 50.9 33.3 2.1 73.0 38.8 7.3 65.2 50.0 32.6 WIND SPEED (MEAN KNOTS) 3.7 3.9 4.9 6.1 5.7 4.2 4.7 3.7 4.9 4.1 4.6 0.8 4.3 FASTEST WIND DIRECTION 250 210 260 250 240 180 190 150 240 270 230 240 230 FASTEST WIND SPEED (KNOTS) 29 29 29 27 35 35 29 19 29 23 39 16 39 DAY 18 8 25 19 8 3 6 23 20 9 11 4 DAYS WITH SKY CLEAR (0-2)/8 21 13 15 7 13 27 30 30 28 28 24 12 248 DAYS WITH P.CLOUDY (3-6)/8 7 11 11 14 15 3 1 1 2 2 6 11 84 DAYS WITH CLOUDY (7-8)/8 3 4 5 9 3 0 0 0 0 1 0 8 33 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 7 7 DURATION OF SUNSHINE HOURS 250.5 218.5 248.7 187.7 ****** 205.0 380.2 369.4 320.5 ****** 267.3 162.3 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 816.6 813.8 814.0 814.1 816.0 812.2 809.0 812.6 814.8 817.6 817.2 816.6 814.5 MAX. QFE PRESSURE IN HPA 823.5 819.5 821.2 819.0 820.3 817.6 813.7 817.1 820.9 824.7 823.5 820.4 824.7 DAY-HOUR 7- 6 1- 6 3- 6 13- 6 26-15 1- 6 4- 6 25- 6 13- 6 27- 6 16- 6 20- 6 MIN. QFE PRESSURE IN HPA 811.7 804.7 808.8 807.7 810.5 807.5 804.4 808.5 810.7 812.5 810.6 810.6 804.4 DAY-HOUR 11-12 23-12 26-12 24-15 10-12 22-12 16-15 22-15 5-12 14-12 25-15 4-12 MEAN QNH PRESSURE IN HPA 1020.4 1017.1 1017.3 1017.4 1019.7 1015.2 1011.3 1015.7 1018.3 1021.7 1021.2 1020.4 1018.0 MAX. QNH PRESSURE IN HPA 1028.7 1023.9 1026.0 1023.3 1024.9 1021.7 1017.0 1021.1 1025.6 1030.2 1028.7 1025.0 1030.2 DAY-HOUR 7- 6 1- 6 3- 6 13- 6 26-15 1- 6 4- 6 25- 6 13- 6 27- 6 16- 6 20- 6 MIN. QNH PRESSURE IN HPA 1014.6 1006.2 1011.1 1009.8 1013.2 1009.6 1005.8 1010.8 1013.4 1015.6 1013.3 1013.3 1005.8 DAY-HOUR 11-12 23-12 26-12 24-15 10-12 22-12 16-15 22-15 5-12 14-12 25-15 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 816.8 814.1 814.2 814.6 816.5 813.2 809.8 813.3 815.6 818.3 817.8 816.8 815.1 MAX. QFE PRESSURE IN HPA 822.0 818.6 820.0 817.8 820.3 817.4 813.1 816.2 820.2 823.9 822.7 819.6 823.9 DAY 7 1 3 4 27 2 4 25 13 27 16 20 MIN. QFE PRESSURE IN HPA 812.4 808.8 808.9 810.2 812.7 809.9 806.2 810.9 813.0 813.8 812.2 812.3 806.2 DAY 1 5 27 24 11 22 17 23 5 13 26 4 MEAN QNH PRESSURE IN HPA 1020.7 1017.5 1017.6 1018.1 1020.4 1016.4 1012.3 1016.6 1019.3 1022.5 1021.9 1020.8 1018.7 MAX. QNH PRESSURE IN HPA 1026.9 1022.9 1024.5 1021.9 1024.9 1021.4 1016.3 1020.0 1024.8 1029.2 1027.8 1024.1 1029.2 DAY 7 1 3 4 27 2 4 25 13 27 16 20 MIN. QNH PRESSURE IN HPA 1015.4 1011.1 1011.2 1012.8 1015.8 1012.4 1008.0 1013.6 1016.2 1017.1 1015.2 1015.3 1008.0 DAY 1 5 27 24 11 22 17 23 5 13 26 4 MEAN QFF PRESSURE IN HPA 1020.7 1016.6 1014.3 1010.4 1009.3 1001.2 994.1 1000.1 1006.2 1015.0 1018.4 1024.3 1010.9 MAX. QFF PRESSURE IN HPA 1027.8 1023.5 1024.1 1017.3 1016.0 1013.6 999.2 1003.9 1011.4 1024.9 1028.0 1032.5 1032.5 DAY 7 2 3 13 27 1 29 11 22 27 28 15 MIN. QFF PRESSURE IN HPA 1011.1 1005.4 1003.4 1006.0 1004.6 993.3 989.0 996.3 1001.7 1004.1 1009.7 1013.2 989.0 DAY 17 5 26 20 9 22 17 8 1 13 11 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 817.8 815.0 815.2 815.3 817.0 813.5 810.1 813.9 816.3 819.2 818.7 817.7 815.8 MAX. QFE PRESSURE IN HPA 823.5 819.5 821.2 819.0 820.3 817.6 813.7 817.1 820.9 824.7 823.5 820.4 824.7 DAY 7 1 3 13 27 1 4 25 13 27 16 20 MIN. QFE PRESSURE IN HPA 813.3 809.8 811.2 810.3 813.4 810.1 806.8 811.3 813.7 814.3 813.0 812.7 806.8 DAY 22 23 27 24 11 22 17 8 5 13 26 4 MEAN QNH PRESSURE IN HPA 1021.9 1018.6 1018.8 1018.9 1020.9 1016.7 1012.7 1017.2 1020.1 1023.6 1022.9 1021.8 1019.5 MAX. QNH PRESSURE IN HPA 1028.7 1023.9 1026.0 1023.3 1024.9 1021.7 1017.0 1021.1 1025.6 1030.2 1028.7 1025.0 1030.2 DAY 7 1 3 13 27 1 4 25 13 27 16 20 MIN. QNH PRESSURE IN HPA 1016.5 1012.3 1014.0 1012.9 1016.6 1012.7 1008.7 1014.1 1017.0 1017.7 1016.2 1015.8 1008.7 DAY 22 23 27 24 11 22 17 8 5 13 26 4 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 816.7 814.0 814.3 814.3 816.0 812.5 809.2 813.1 815.1 817.8 817.1 816.6 814.7 MAX. QFE PRESSURE IN HPA 822.5 818.4 820.1 818.0 819.0 817.2 812.4 816.3 819.7 823.1 821.8 819.5 823.1 DAY 7 1 3 13 3 1 4 25 13 27 16 20 MIN. QFE PRESSURE IN HPA 812.9 807.1 810.2 809.3 812.6 809.0 806.3 810.6 812.4 813.5 811.6 810.9 806.3 DAY 22 23 17 24 10 22 2 8 5 13 26 4 MEAN QNH PRESSURE IN HPA 1020.5 1017.3 1017.7 1017.7 1019.8 1015.5 1011.6 1016.2 1018.6 1021.9 1021.1 1020.5 1018.2 MAX. QNH PRESSURE IN HPA 1027.5 1022.6 1024.7 1022.1 1023.3 1021.2 1015.4 1020.1 1024.2 1028.3 1026.7 1023.9 1028.3 DAY 7 1 3 13 3 1 4 25 13 27 16 20 MIN. QNH PRESSURE IN HPA 1016.0 1009.1 1012.8 1011.7 1015.7 1011.4 1008.1 1013.3 1015.4 1016.8 1014.5 1013.6 1008.1 DAY 22 23 17 24 10 22 2 8 5 13 26 4 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 815.5 812.7 813.0 813.0 815.0 811.1 808.0 811.7 813.5 816.4 816.0 815.5 813.4 MAX. QFE PRESSURE IN HPA 821.4 817.8 819.1 817.0 819.8 815.7 811.1 814.7 818.1 821.6 820.1 818.2 821.6 DAY 7 1 3 12 26 2 28 25 13 26 15 20 MIN. QFE PRESSURE IN HPA 811.7 804.7 808.8 807.9 810.5 807.5 804.9 808.9 810.7 812.5 810.8 810.6 804.7 DAY 11 23 26 24 10 22 10 22 5 14 25 4 MEAN QNH PRESSURE IN HPA 1019.1 1015.8 1016.2 1016.2 1018.6 1013.9 1010.2 1014.5 1016.8 1020.2 1019.7 1019.2 1016.7 MAX. QNH PRESSURE IN HPA 1026.2 1021.9 1023.5 1020.9 1024.3 1019.4 1013.9 1018.2 1022.3 1026.5 1024.7 1022.4 1026.5 DAY 7 1 3 12 26 2 28 25 13 26 15 20 MIN. QNH PRESSURE IN HPA 1014.6 1006.2 1011.1 1010.0 1013.2 1009.6 1006.4 1011.2 1013.4 1015.6 1013.5 1013.3 1006.2 DAY 11 23 26 24 10 22 10 22 5 14 25 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 816.3 813.2 813.3 813.1 815.3 810.8 807.7 811.3 813.7 816.6 816.6 816.2 813.7 MAX. QFE PRESSURE IN HPA 821.8 818.3 819.1 817.3 820.3 816.4 811.1 814.4 817.7 822.2 820.7 818.8 822.2 DAY 7 1 3 12 26 1 28 25 12 26 15 30 MIN. QFE PRESSURE IN HPA 812.2 808.1 808.8 807.7 810.5 807.5 804.4 808.5 810.8 812.6 810.6 811.8 804.4 DAY 25 23 26 24 10 22 16 22 4 15 25 4 MEAN QNH PRESSURE IN HPA 1020.0 1016.4 1016.5 1016.3 1018.9 1013.6 1009.8 1014.1 1017.0 1020.5 1020.5 1020.0 1017.0 MAX. QNH PRESSURE IN HPA 1026.7 1022.5 1023.5 1021.3 1024.9 1020.2 1013.9 1017.8 1021.8 1027.2 1025.4 1023.1 1027.2 DAY 7 1 3 12 26 1 28 25 12 26 15 30 MIN. QNH PRESSURE IN HPA 1015.2 1010.3 1011.1 1009.8 1013.2 1009.6 1005.8 1010.8 1013.5 1015.7 1013.3 1014.7 1005.8 DAY 25 23 26 24 10 22 16 22 4 15 25 4 MEAN QFF PRESSURE IN HPA 1020.0 1015.5 1013.1 1008.5 1007.9 998.2 991.5 997.6 1003.8 1013.0 1017.0 1023.5 1009.1 MAX. QFF PRESSURE IN HPA 1028.1 1021.3 1023.2 1015.3 1015.6 1010.5 996.8 1001.5 1008.6 1022.2 1026.1 1033.1 1033.1 DAY 7 1 3 12 26 1 28 11 22 26 27 14 MIN. QFF PRESSURE IN HPA 1011.0 1008.2 1004.1 1003.3 1002.7 991.7 986.6 993.7 999.7 1004.7 1008.0 1012.6 986.6 DAY 11 23 26 24 9 22 16 22 5 13 25 4 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 SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.3 7.3 8.8 15.9 21.6 27.2 27.1 27.3 24.9 17.1 9.3 7.2 16.1 MINIMUN AIR TEMPERATURE (C) -7.7 1.1 2.7 7.8 11.9 16.0 17.3 16.1 12.3 5.6 0.9 -1.6 6.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 1 1 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 22 1 0 0 0 0 0 0 0 0 0 8 31 DAYS WITH FREEZING MIN.<= 0 28 13 7 1 0 0 0 0 0 1 13 21 84 TEMPERATURE RECORDS LOWEST(C) -20.0 -4.2 -1.6 0.0 8.0 8.4 13.4 11.8 7.0 0.0 -3.8 -7.2 -20.0 DAY 15 14 29 6 3 7 21 5 21 21 19 4 MAXIMUM AIR TEMPERATURE (C) 3.9 11.9 13.3 20.8 26.8 32.5 31.8 32.9 31.4 23.0 14.7 13.1 21.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 6 27 29 29 21 0 0 0 112 DAYS WITH MAXIMUM TEMP. <= 0 8 0 0 0 0 0 0 0 0 0 0 0 8 TEMPERATURE RECORDS HIGHEST(C) 11.4 19.2 20.4 29.0 33.8 35.2 34.0 35.0 35.0 28.4 21.0 17.8 35.2 DAY 5 10 30 26 31 4 3 8 10 1 3 29 DIF. BETWEEN (MAX.-MIN.) (C) 11.6 10.8 10.6 13.0 14.9 16.5 14.5 16.8 19.1 17.4 13.8 14.7 14.4 MEAN DAILY TEMP. (MDT) (C) -1.9 6.5 8.0 14.3 19.3 24.2 24.6 24.5 21.9 14.3 7.8 5.7 14.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 13.8 93.4 110.1 107.6 39.1 0.0 0.0 0.0 364.1 HEATING DEG. DAYS(BASE 18 0C) 616.7 333.9 309.5 109.5 14.2 0.0 0.0 0.0 0.0 115.3 305.8 380.0 2184.9 DEWPOINT (MEAN C) -5.8 -1.4 -0.0 1.6 6.7 6.3 7.5 6.6 3.8 0.7 -1.6 -2.8 1.8 MIXING RATIO (G/KG) 3.23 4.40 4.89 5.54 7.82 7.57 8.16 7.65 6.35 5.19 4.31 3.92 5.75 VAPOUR PRESSURE (HPA) 4.21 5.70 6.32 7.19 10.12 9.75 10.52 9.88 8.22 6.76 5.63 5.13 7.45 SATURATION DEF. (HPA) 1.89 4.96 5.43 11.67 16.89 27.74 26.57 28.11 25.36 14.10 6.85 5.64 14.60 RELATIVE HUMIDITY (MEAN %) 73 58 57 41 41 28 30 28 27 35 50 52 43 RELATIVE HUMIDITY (MAX. %) 87 80 77 61 62 42 42 41 41 53 66 75 61 RELATIVE HUMIDITY (MIN. %) 58 41 44 30 30 21 24 22 20 26 39 37 33 RELATIVE HUMIDITY (MEAN% 03UTC) 85 79 75 59 61 42 43 41 41 52 65 73 60 RELATIVE HUMIDITY (MEAN% 09UTC) 65 49 49 34 35 24 26 24 23 29 43 43 37 RELATIVE HUMIDITY (MEAN% 15UTC) 76 54 53 36 36 23 26 23 23 31 48 47 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.9 13.8 38.2 10.8 14.8 0.0 0.0 0.0 0.0 0.2 4.3 13.7 128.7 DAYS WITH PRECIPITATION >=10 0 0 2 0 0 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 5 4 1 2 1 2 0 0 0 0 0 0 1 11 DAYS WITH PRECIPITATION >= 1 7 5 5 3 4 0 0 0 0 0 1 2 27 DAYS WITH PRECIPITATION 9 8 10 4 7 0 0 0 0 1 2 3 44 GREATEST DAILY PRECIPITATION 8.0 5.0 15.0 6.0 5.0 0.0 0.0 0.0 0.0 0.2 4.0 12.0 15.0 DAY 6 21 7 15 12 ** ** ** ** 10 28 23 DAY WITH THUNDER STORM 0 0 0 1 1 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 7 1 0 0 0 0 0 0 0 0 0 1 9 DAYS WITH DUST 0 0 1 0 1 0 0 0 5 0 0 0 7 WIND DIRECTION (PREVAILING) 225 270 225 225 270 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 13.9 14.0 14.5 18.8 14.2 9.8 12.1 10.4 10.2 8.6 9.4 7.3 10.2 PREVAILING WIND PERCENT 5.2 15.2 18.1 20.1 14.8 16.7 36.1 25.2 11.3 15.5 15.3 11.0 13.2 CALMS PERCENT OF WIND 80.6 51.0 37.4 42.3 54.2 48.7 42.6 47.1 58.0 51.0 70.0 67.1 54.2 NO. OF WIND OBSERVATION 155 145 155 149 155 150 155 155 150 155 150 155 1829 VECTOR WIND DIRECTION (MEAN) 243 235 220 238 274 285 41 30 295 260 20 266 270 VECTOR WIND MAGNITUDE(KNOTS) 0.5 4.2 4.1 4.9 3.5 1.3 4.9 3.3 0.5 2.0 1.5 0.9 1.1 WIND STEADINESES (MEAN %) 23.8 63.6 47.7 54.4 61.4 20.6 71.0 61.1 10.2 32.8 53.6 30.0 19.6 WIND SPEED (MEAN KNOTS) 2.1 6.6 8.6 9.0 5.7 6.3 6.9 5.4 4.9 6.1 2.8 3.0 5.6 FASTEST WIND DIRECTION 210 230 180 200 300 240 130 50 270 250 250 260 180 FASTEST WIND SPEED (KNOTS) 23 29 39 35 29 29 29 23 31 33 23 23 39 DAY 5 5 2 3 22 5 10 10 22 15 8 11 DAYS WITH SKY CLEAR (0-2)/8 13 10 9 16 15 26 26 26 30 30 16 19 236 DAYS WITH P.CLOUDY (3-6)/8 12 17 16 10 14 4 5 5 0 1 11 12 107 DAYS WITH CLOUDY (7-8)/8 6 2 6 4 2 0 0 0 0 0 3 0 23 DAYS WITH VISIBILITY =< 2 KM 6 1 0 0 0 0 0 0 1 0 0 0 8 DURATION OF SUNSHINE HOURS ****** ****** ****** 262.0 308.6 364.9 336.0 341.3 318.5 305.5 208.2 237.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 815.4 812.3 811.3 814.5 815.3 812.2 813.2 813.5 814.3 817.5 818.9 818.1 814.7 MAX. QFE PRESSURE IN HPA 822.4 819.7 817.4 819.4 820.0 817.3 818.7 819.4 821.9 824.1 827.1 823.3 827.1 DAY-HOUR 26- 6 8- 6 29- 6 8- 6 17- 6 3- 6 3- 6 30- 6 25- 6 2- 6 18- 6 4- 6 MIN. QFE PRESSURE IN HPA 807.6 717.4 801.3 808.4 811.0 806.6 807.8 804.4 806.9 811.0 813.9 813.6 717.4 DAY-HOUR 12-12 9- 6 15- 3 3- 9 29-15 19-15 6-12 8- 9 20-12 5-12 29-12 15- 3 MEAN QNH PRESSURE IN HPA 1019.1 1015.3 1014.1 1017.9 1018.9 1015.2 1016.3 1016.7 1017.7 1021.6 1023.2 1022.3 1018.2 MAX. QNH PRESSURE IN HPA 1027.4 1024.2 1021.4 1023.8 1024.5 1021.3 1023.0 1023.8 1026.8 1029.5 1033.0 1028.5 1033.0 DAY-HOUR 26- 6 8- 6 29- 6 8- 6 17- 6 3- 6 3- 6 30- 6 25- 6 2- 6 18- 6 4- 6 MIN. QNH PRESSURE IN HPA 1009.7 901.4 1002.1 1010.6 1013.8 1008.5 1009.9 1005.8 1008.8 1013.8 1017.2 1016.9 901.4 DAY-HOUR 12-12 9- 6 15- 3 3- 9 29-15 19-15 6-12 8- 9 20-12 5-12 29-12 15- 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 815.4 813.0 811.3 815.0 816.0 813.2 813.9 814.4 815.1 818.2 819.3 818.3 815.2 MAX. QFE PRESSURE IN HPA 821.0 818.2 816.9 818.9 819.1 816.9 818.4 819.3 820.4 823.3 826.1 822.5 826.1 DAY 26 8 29 8 17 3 4 30 26 2 19 4 MIN. QFE PRESSURE IN HPA 808.9 802.2 801.3 810.6 813.3 809.3 809.2 810.4 810.2 812.7 814.7 813.6 801.3 DAY 12 5 15 10 30 19 7 8 20 6 29 15 MEAN QNH PRESSURE IN HPA 1019.0 1016.1 1014.1 1018.5 1019.8 1016.3 1017.3 1017.8 1018.7 1022.4 1023.6 1022.5 1018.8 MAX. QNH PRESSURE IN HPA 1025.7 1022.4 1020.8 1023.2 1023.5 1020.8 1022.6 1023.7 1025.0 1028.5 1031.8 1027.5 1031.8 DAY 26 8 29 8 17 3 4 30 26 2 19 4 MIN. QNH PRESSURE IN HPA 1011.2 1003.2 1002.1 1013.3 1016.5 1011.7 1011.6 1013.0 1012.8 1015.8 1018.2 1016.9 1002.1 DAY 12 5 15 10 30 19 7 8 20 6 29 15 MEAN QFF PRESSURE IN HPA 1024.6 1013.9 1010.5 1010.1 1007.3 999.9 1000.8 1001.8 1005.1 1014.4 1021.1 1021.6 1010.9 MAX. QFF PRESSURE IN HPA 1035.8 1023.9 1020.2 1016.4 1012.2 1005.1 1004.5 1008.5 1013.1 1022.9 1033.4 1030.5 1035.8 DAY 15 24 29 6 7 3 4 31 26 20 19 4 MIN. QFF PRESSURE IN HPA 1011.4 1000.9 999.6 1002.2 1001.2 995.7 994.4 996.3 999.2 1006.5 1014.7 1013.0 994.4 DAY 6 5 15 10 29 20 12 9 22 5 28 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 816.6 810.7 812.5 815.5 816.4 813.6 814.3 814.9 815.8 819.0 820.2 819.4 815.7 MAX. QFE PRESSURE IN HPA 822.4 819.7 817.4 819.4 820.0 817.3 818.7 819.4 821.9 824.1 827.1 823.3 827.1 DAY 26 8 29 8 17 3 3 30 25 2 18 4 MIN. QFE PRESSURE IN HPA 809.4 717.4 807.5 810.0 813.0 809.7 809.5 810.7 810.5 813.8 815.6 814.8 717.4 DAY 12 9 13 3 29 19 7 8 20 5 28 15 MEAN QNH PRESSURE IN HPA 1020.4 1013.4 1015.5 1019.2 1020.2 1016.8 1017.7 1018.4 1019.6 1023.3 1024.8 1023.9 1019.4 MAX. QNH PRESSURE IN HPA 1027.4 1024.2 1021.4 1023.8 1024.5 1021.3 1023.0 1023.8 1026.8 1029.5 1033.0 1028.5 1033.0 DAY 26 8 29 8 17 3 3 30 25 2 18 4 MIN. QNH PRESSURE IN HPA 1011.8 901.4 1009.6 1012.6 1016.2 1012.2 1012.0 1013.4 1013.2 1017.1 1019.3 1018.3 901.4 DAY 12 9 13 3 29 19 7 8 20 5 28 15 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 815.6 813.4 811.6 814.7 815.6 812.6 813.5 813.7 814.7 817.6 819.0 818.2 815.0 MAX. QFE PRESSURE IN HPA 821.3 819.2 816.4 818.6 819.5 816.5 818.2 818.1 821.0 822.7 825.8 822.1 825.8 DAY 26 8 29 8 17 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 808.1 804.3 807.1 808.4 812.2 808.5 808.6 804.4 809.0 812.3 814.1 814.8 804.3 DAY 12 5 13 3 29 19 7 8 20 5 28 15 MEAN QNH PRESSURE IN HPA 1019.3 1016.6 1014.5 1018.2 1019.3 1015.6 1016.7 1017.0 1018.2 1021.7 1023.3 1022.4 1018.6 MAX. QNH PRESSURE IN HPA 1026.1 1023.6 1020.2 1022.9 1023.9 1020.3 1022.4 1022.3 1025.7 1027.8 1031.5 1027.1 1031.5 DAY 26 8 29 8 17 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1010.3 1005.7 1009.1 1010.6 1015.2 1010.8 1010.9 1005.8 1011.4 1015.3 1017.5 1018.3 1005.7 DAY 12 5 13 3 29 19 7 8 20 5 28 15 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 814.6 812.0 810.2 813.5 814.3 811.1 812.2 812.3 813.0 816.3 817.8 817.1 813.7 MAX. QFE PRESSURE IN HPA 820.1 818.4 815.1 817.6 818.2 814.7 817.9 816.2 819.1 821.3 824.8 821.1 824.8 DAY 26 8 29 8 17 3 3 31 25 2 18 28 MIN. QFE PRESSURE IN HPA 807.6 804.9 804.4 808.9 811.2 806.9 807.8 808.2 806.9 811.0 813.9 813.8 804.4 DAY 12 5 4 3 29 19 6 8 20 5 29 15 MEAN QNH PRESSURE IN HPA 1018.1 1015.0 1012.8 1016.7 1017.7 1013.9 1015.3 1015.3 1016.2 1020.1 1021.9 1021.1 1017.0 MAX. QNH PRESSURE IN HPA 1024.7 1022.6 1018.7 1021.7 1022.4 1018.2 1022.0 1020.0 1023.5 1026.1 1030.3 1025.9 1030.3 DAY 26 8 29 8 17 3 3 31 25 2 18 28 MIN. QNH PRESSURE IN HPA 1009.7 1006.4 1005.8 1011.2 1014.0 1008.8 1009.9 1010.4 1008.8 1013.8 1017.2 1017.1 1005.8 DAY 12 5 4 3 29 19 6 8 20 5 29 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 815.0 812.5 810.8 813.7 814.2 810.8 811.9 812.1 812.9 816.6 818.2 817.6 813.9 MAX. QFE PRESSURE IN HPA 820.1 819.0 814.9 818.1 817.8 814.4 817.0 816.3 819.2 821.3 825.2 821.4 825.2 DAY 26 8 29 8 7 3 3 30 25 2 18 28 MIN. QFE PRESSURE IN HPA 807.6 807.2 807.1 810.3 811.0 806.6 808.5 807.8 807.7 811.3 814.1 814.4 806.6 DAY 12 5 12 10 29 19 6 8 20 5 28 15 MEAN QNH PRESSURE IN HPA 1018.6 1015.5 1013.5 1017.0 1017.6 1013.6 1014.9 1015.1 1016.1 1020.5 1022.4 1021.7 1017.2 MAX. QNH PRESSURE IN HPA 1024.7 1023.3 1018.4 1022.3 1021.9 1017.8 1020.9 1020.1 1023.6 1026.1 1030.8 1026.2 1030.8 DAY 26 8 29 8 7 3 3 30 25 2 18 28 MIN. QNH PRESSURE IN HPA 1009.7 1009.2 1009.1 1012.9 1013.8 1008.5 1010.8 1009.9 1009.8 1014.1 1017.5 1017.8 1008.5 DAY 12 5 12 10 29 19 6 8 20 5 28 15 MEAN QFF PRESSURE IN HPA 1023.9 1013.2 1009.6 1008.5 1004.9 996.9 998.1 998.9 1002.1 1012.5 1019.7 1020.6 1009.1 MAX. QFF PRESSURE IN HPA 1034.5 1021.1 1016.1 1014.8 1011.9 1002.1 1002.5 1005.4 1010.6 1021.0 1031.5 1028.5 1034.5 DAY 14 23 28 8 7 7 3 31 25 19 18 3 MIN. QFF PRESSURE IN HPA 1011.0 1003.5 1004.8 1002.4 998.6 991.3 992.8 992.7 996.4 1004.2 1013.5 1013.2 991.3 DAY 6 10 12 10 28 19 12 8 20 5 1 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.5 5.4 8.0 14.2 20.4 26.2 31.5 29.1 24.1 18.7 9.3 4.6 16.3 MINIMUN AIR TEMPERATURE (C) -2.6 -3.3 0.7 6.3 11.3 15.9 20.5 16.3 12.0 8.6 2.0 -2.3 7.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 12 0 0 0 0 0 13 DAYS WITH MINIMUM TEMP. <=-4 14 14 2 0 0 0 0 0 0 0 0 10 40 DAYS WITH FREEZING MIN.<= 0 23 23 13 2 0 0 0 0 0 0 10 24 95 TEMPERATURE RECORDS LOWEST(C) -8.6 -13.2 -6.6 -1.4 4.0 11.4 16.0 9.4 7.2 2.2 -2.8 -11.6 -13.2 DAY 20 8 1 12 6 5 1 30 10 28 21 22 MAXIMUM AIR TEMPERATURE (C) 9.4 11.2 13.1 19.2 25.3 31.4 37.2 34.9 30.1 24.3 14.2 9.9 21.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 26 31 31 15 0 0 0 105 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 14.2 20.4 18.8 26.4 30.8 35.2 39.6 38.0 34.4 29.4 20.2 15.4 39.6 DAY 11 21 3 27 31 15 18 15 1 3 2 8 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 14.5 12.4 12.9 14.0 15.5 16.7 18.6 18.1 15.7 12.2 12.2 14.6 MEAN DAILY TEMP. (MDT) (C) 3.4 4.0 6.9 12.7 18.3 23.7 28.8 25.6 21.1 16.4 8.1 3.8 14.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.3 80.0 243.0 143.1 22.8 2.7 0.0 0.0 494.9 HEATING DEG. DAYS(BASE 18 0C) 452.0 392.7 343.7 159.8 29.7 0.0 0.0 0.0 0.5 68.4 297.6 440.7 2185.1 DEWPOINT (MEAN C) -5.0 -8.6 -3.7 -0.3 1.0 4.4 7.5 1.2 1.9 1.6 0.2 -3.2 -0.2 MIXING RATIO (G/KG) 3.30 2.65 3.80 4.96 5.19 6.75 8.44 5.32 5.54 5.43 4.82 3.77 5.00 VAPOUR PRESSURE (HPA) 4.29 3.46 4.92 6.43 6.75 8.72 10.82 6.88 7.20 7.08 6.28 4.91 6.48 SATURATION DEF. (HPA) 4.58 6.27 6.31 10.60 18.33 26.60 37.39 35.67 24.53 15.76 6.02 4.00 16.34 RELATIVE HUMIDITY (MEAN %) 54 39 48 43 31 28 24 18 25 34 56 61 38 RELATIVE HUMIDITY (MAX. %) 73 57 71 68 53 45 36 31 40 51 78 81 57 RELATIVE HUMIDITY (MIN. %) 39 26 33 29 20 19 18 13 18 24 41 44 27 RELATIVE HUMIDITY (MEAN% 03UTC) 72 55 69 66 52 45 36 31 40 51 77 78 56 RELATIVE HUMIDITY (MEAN% 09UTC) 46 32 41 33 23 22 20 14 20 27 47 50 31 RELATIVE HUMIDITY (MEAN% 15UTC) 49 33 41 38 25 23 20 14 21 30 52 59 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.8 0.0 21.8 34.9 11.1 6.4 0.0 0.0 0.0 1.1 10.4 24.5 131.0 DAYS WITH PRECIPITATION >=10 1 0 0 1 0 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 5 1 0 2 3 1 0 0 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 1 2 0 5 5 3 3 0 0 0 0 3 5 26 DAYS WITH PRECIPITATION 5 0 9 9 3 5 0 0 0 2 7 5 45 GREATEST DAILY PRECIPITATION 18.0 0.0 9.0 17.0 9.0 4.0 0.0 0.0 0.0 0.6 4.0 10.0 18.0 DAY 17 ** 29 7 20 24 ** ** ** 24 28 21 DAY WITH THUNDER STORM 0 0 0 0 1 2 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 3 0 2 0 0 0 0 0 0 0 0 2 7 DAYS WITH DUST 0 0 0 1 0 1 0 0 1 0 0 0 3 WIND DIRECTION (PREVAILING) 270 225 225 225 270 270 45 45 45 270 45 225 225 PREVAILING WIND SPEED(KNOTS) 13.0 18.3 18.5 19.4 16.8 16.0 10.1 10.8 10.7 15.6 7.6 12.8 16.7 PREVAILING WIND PERCENT 15.5 26.4 25.8 18.7 13.5 13.3 15.5 29.0 16.7 12.3 12.7 11.0 11.5 CALMS PERCENT OF WIND 63.2 45.7 35.5 39.3 50.3 48.0 55.5 54.2 48.7 56.1 66.7 74.8 53.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 242 233 230 251 256 299 19 38 303 271 344 234 257 VECTOR WIND MAGNITUDE(KNOTS) 3.7 6.0 7.1 4.6 3.1 2.1 0.7 4.2 2.2 3.3 0.7 2.1 2.3 WIND STEADINESES (MEAN %) 77.1 74.1 68.9 50.0 47.7 30.9 14.3 85.7 34.4 57.9 21.9 75.0 37.7 WIND SPEED (MEAN KNOTS) 4.8 8.1 10.3 9.2 6.5 6.8 4.9 4.9 6.4 5.7 3.2 2.8 6.1 FASTEST WIND DIRECTION 200 210 200 320 270 310 170 360 280 250 220 230 270 FASTEST WIND SPEED (KNOTS) 49 39 54 43 68 39 23 23 29 39 23 39 68 DAY 16 19 28 15 19 23 4 1 27 3 5 10 DAYS WITH SKY CLEAR (0-2)/8 21 24 15 13 16 22 23 31 30 22 11 18 246 DAYS WITH P.CLOUDY (3-6)/8 4 4 12 15 12 7 8 0 0 9 12 11 94 DAYS WITH CLOUDY (7-8)/8 6 0 4 2 3 1 0 0 0 0 7 2 25 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 2 2 DURATION OF SUNSHINE HOURS 219.7 270.3 264.6 262.2 291.9 315.6 314.6 373.2 331.2 273.1 173.9 214.6 3304.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 814.3 813.9 811.0 813.6 815.6 812.6 809.0 812.5 816.0 818.2 817.2 815.3 814.1 MAX. QFE PRESSURE IN HPA 820.5 821.8 821.7 818.9 820.7 817.2 813.2 816.3 821.4 823.2 825.3 822.0 825.3 DAY-HOUR 7- 6 17- 6 11- 6 14- 6 12- 6 8- 6 28- 6 10- 6 19- 6 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 804.7 809.2 802.0 807.2 809.2 805.5 804.0 806.6 811.8 813.2 812.3 808.4 802.0 DAY-HOUR 17-12 27-12 29- 9 11- 9 5-12 30-15 16-15 5-15 2-12 23-15 19-12 10- 9 MEAN QNH PRESSURE IN HPA 1017.7 1017.2 1013.8 1016.9 1019.2 1015.7 1011.4 1015.6 1019.8 1022.4 1021.2 1019.0 1017.5 MAX. QNH PRESSURE IN HPA 1025.1 1026.7 1026.6 1023.2 1025.4 1021.2 1016.4 1020.1 1026.2 1028.4 1030.9 1026.9 1030.9 DAY-HOUR 7- 6 17- 6 11- 6 14- 6 12- 6 8- 6 28- 6 10- 6 19- 6 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1006.2 1011.6 1003.0 1009.2 1011.6 1007.2 1005.4 1008.5 1014.7 1016.4 1015.3 1010.6 1003.0 DAY-HOUR 17-12 27-12 29- 9 11- 9 5-12 30-15 16-15 5-15 2-12 23-15 19-12 10- 9 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 814.6 813.9 811.2 814.0 816.4 813.5 809.8 813.3 816.9 818.9 817.5 815.4 814.6 MAX. QFE PRESSURE IN HPA 819.6 820.3 820.3 817.7 820.2 816.9 813.0 815.8 820.7 821.8 824.5 820.0 824.5 DAY 7 17 11 14 12 15 29 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 806.5 809.8 804.7 808.2 810.1 808.6 805.9 809.2 813.7 815.3 814.2 809.1 804.7 DAY 16 27 25 11 5 30 16 5 13 24 13 10 MEAN QNH PRESSURE IN HPA 1018.1 1017.3 1014.0 1017.4 1020.2 1016.7 1012.4 1016.5 1020.8 1023.2 1021.6 1019.1 1018.1 MAX. QNH PRESSURE IN HPA 1024.1 1024.9 1024.9 1021.8 1024.8 1020.8 1016.2 1019.5 1025.4 1026.7 1029.9 1024.5 1029.9 DAY 7 17 11 14 12 15 29 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1008.4 1012.3 1006.2 1010.4 1012.7 1010.9 1007.6 1011.6 1017.0 1018.9 1017.6 1011.5 1006.2 DAY 16 27 25 11 5 30 16 5 13 24 13 10 MEAN QFF PRESSURE IN HPA 1018.5 1017.5 1011.6 1010.3 1008.7 1001.0 993.2 999.8 1007.7 1013.8 1018.5 1019.6 1010.0 MAX. QFF PRESSURE IN HPA 1027.2 1028.1 1023.9 1018.5 1016.5 1007.0 997.2 1005.0 1013.3 1017.1 1027.5 1029.1 1029.1 DAY 19 8 11 14 7 1 29 30 19 18 8 23 MIN. QFF PRESSURE IN HPA 1003.8 1006.9 1000.2 1002.3 1001.0 995.0 988.1 993.3 1000.8 1007.4 1011.7 1006.5 988.1 DAY 16 19 25 10 5 30 16 6 2 7 12 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 815.5 815.1 812.1 814.6 816.7 813.8 810.3 813.9 817.6 819.7 818.4 816.4 815.4 MAX. QFE PRESSURE IN HPA 820.5 821.8 821.7 818.9 820.7 817.2 813.2 816.3 821.4 823.2 825.3 822.0 825.3 DAY 7 17 11 14 12 8 28 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 807.0 810.5 803.3 808.2 812.0 808.9 806.1 809.3 814.7 816.3 815.1 809.3 803.3 DAY 16 27 29 11 5 30 16 5 13 23 13 10 MEAN QNH PRESSURE IN HPA 1019.1 1018.7 1015.1 1018.1 1020.6 1017.1 1012.9 1017.2 1021.7 1024.1 1022.7 1020.3 1019.0 MAX. QNH PRESSURE IN HPA 1025.1 1026.7 1026.6 1023.2 1025.4 1021.2 1016.4 1020.1 1026.2 1028.4 1030.9 1026.9 1030.9 DAY 7 17 11 14 12 8 28 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1009.0 1013.2 1004.5 1010.4 1015.0 1011.2 1007.9 1011.7 1018.2 1020.1 1018.7 1011.7 1004.5 DAY 16 27 29 11 5 30 16 5 13 23 13 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 814.5 814.2 811.3 813.8 815.8 812.9 809.4 812.9 816.4 818.4 817.4 815.4 814.4 MAX. QFE PRESSURE IN HPA 819.2 820.1 820.4 818.2 819.2 816.2 812.6 815.5 819.8 822.1 823.9 821.1 823.9 DAY 12 17 11 14 12 14 28 28 19 9 8 28 MIN. QFE PRESSURE IN HPA 805.7 809.6 802.0 807.2 810.6 807.7 805.1 808.8 813.3 814.8 814.2 808.4 802.0 DAY 17 27 29 11 5 30 16 5 13 23 12 10 MEAN QNH PRESSURE IN HPA 1017.9 1017.6 1014.1 1017.1 1019.5 1016.0 1011.9 1016.0 1020.2 1022.6 1021.4 1019.0 1017.8 MAX. QNH PRESSURE IN HPA 1023.6 1024.7 1025.0 1022.4 1023.6 1020.0 1015.7 1019.2 1024.3 1027.1 1029.2 1025.9 1029.2 DAY 12 17 11 14 12 14 28 28 19 9 8 28 MIN. QNH PRESSURE IN HPA 1007.4 1012.1 1003.0 1009.2 1013.3 1009.8 1006.7 1011.1 1016.5 1018.3 1017.6 1010.6 1003.0 DAY 17 27 29 11 5 30 16 5 13 23 12 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.2 813.0 810.0 812.7 814.5 811.5 808.0 811.5 814.7 817.0 816.1 814.5 813.1 MAX. QFE PRESSURE IN HPA 817.9 818.0 818.5 817.0 818.1 815.2 811.3 814.4 818.0 820.5 822.8 819.8 822.8 DAY 19 7 11 14 12 13 28 28 19 8 8 28 MIN. QFE PRESSURE IN HPA 804.7 809.2 802.3 807.9 809.2 806.0 804.2 807.0 811.8 813.6 812.3 808.7 802.3 DAY 17 27 29 11 5 30 16 5 2 23 19 10 MEAN QNH PRESSURE IN HPA 1016.4 1016.2 1012.6 1015.8 1018.0 1014.4 1010.2 1014.3 1018.1 1020.9 1019.9 1017.9 1016.2 MAX. QNH PRESSURE IN HPA 1022.0 1022.1 1022.7 1020.9 1022.3 1018.8 1014.1 1017.8 1022.1 1025.1 1027.9 1024.3 1027.9 DAY 19 7 11 14 12 13 28 28 19 8 8 28 MIN. QNH PRESSURE IN HPA 1006.2 1011.6 1003.3 1010.0 1011.6 1007.8 1005.6 1009.0 1014.7 1016.9 1015.3 1011.0 1003.3 DAY 17 27 29 11 5 30 16 5 2 23 19 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 813.6 813.3 810.5 812.9 814.5 811.4 807.7 811.1 814.6 817.3 816.5 815.0 813.2 MAX. QFE PRESSURE IN HPA 818.2 817.8 819.0 817.0 817.8 815.3 810.7 813.8 817.5 821.0 822.8 820.4 822.8 DAY 7 7 11 14 12 13 28 28 20 8 8 28 MIN. QFE PRESSURE IN HPA 805.3 809.4 803.1 808.2 810.6 805.5 804.0 806.6 811.8 813.2 812.9 809.4 803.1 DAY 17 27 29 10 5 30 16 5 2 23 19 10 MEAN QNH PRESSURE IN HPA 1016.9 1016.5 1013.2 1016.0 1017.9 1014.3 1009.8 1013.9 1018.1 1021.4 1020.4 1018.6 1016.4 MAX. QNH PRESSURE IN HPA 1022.4 1021.9 1023.3 1020.9 1021.9 1018.9 1013.4 1017.1 1021.5 1025.7 1027.9 1025.0 1027.9 DAY 7 7 11 14 12 13 28 28 20 8 8 28 MIN. QNH PRESSURE IN HPA 1006.9 1011.8 1004.3 1010.4 1013.3 1007.2 1005.4 1008.5 1014.7 1016.4 1016.0 1011.8 1004.3 DAY 17 27 29 10 5 30 16 5 2 23 19 10 MEAN QFF PRESSURE IN HPA 1017.3 1016.6 1010.6 1008.9 1006.4 998.4 990.2 997.0 1004.8 1011.9 1017.2 1019.0 1008.2 MAX. QFF PRESSURE IN HPA 1026.1 1025.6 1022.3 1016.9 1013.9 1003.0 993.4 1002.9 1009.2 1015.4 1025.2 1029.2 1029.2 DAY 19 7 11 13 6 13 28 29 20 13 8 28 MIN. QFF PRESSURE IN HPA 1005.4 1005.0 999.4 1002.5 1002.0 990.8 985.1 990.4 997.7 1006.4 1010.4 1008.0 985.1 DAY 16 22 29 28 31 30 16 5 2 23 12 10 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 SHAHREZA (40815) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 59 N LONGITUDE 51 50 E DATA PROCESSING CENTER ELEVATION 1845.2 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.3 6.0 10.6 17.0 21.9 26.7 29.2 28.1 24.5 17.4 12.5 10.2 17.3 MINIMUN AIR TEMPERATURE (C) -3.2 -0.4 3.1 7.9 11.8 15.2 18.9 17.1 12.2 5.7 0.5 -0.3 7.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 4 0 0 0 0 9 DAYS WITH MINIMUM TEMP. <=-4 14 6 2 0 0 0 0 0 0 0 0 6 28 DAYS WITH FREEZING MIN.<= 0 22 18 9 0 0 0 0 0 0 0 18 19 86 TEMPERATURE RECORDS LOWEST(C) -10.6 -7.0 -5.6 3.0 5.0 12.6 16.0 13.6 8.4 1.4 -2.8 -6.6 -10.6 DAY 15 18 6 8 2 1 22 31 18 26 27 6 MAXIMUM AIR TEMPERATURE (C) 8.1 10.8 15.7 22.3 27.1 32.0 35.1 33.8 30.7 23.8 19.3 17.1 23.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 26 29 31 18 2 0 0 108 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 11.0 17.2 24.0 27.8 31.0 34.8 40.2 38.0 34.2 31.2 22.0 22.2 40.2 DAY 12 8 28 15 28 13 10 20 4 1 1 17 DIF. BETWEEN (MAX.-MIN.) (C) 11.3 11.2 12.6 14.4 15.3 16.8 16.2 16.7 18.5 18.1 18.8 17.4 15.6 MEAN DAILY TEMP. (MDT) (C) 2.4 5.2 9.4 15.1 19.5 23.6 27.0 25.4 21.4 14.8 9.9 8.4 15.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 10.7 77.8 185.1 137.9 25.7 0.3 0.0 0.0 437.5 HEATING DEG. DAYS(BASE 18 0C) 483.0 359.2 267.1 89.8 21.5 0.0 0.0 0.0 0.0 108.8 243.1 297.1 1869.6 DEWPOINT (MEAN C) -6.0 -4.5 -2.4 0.2 3.5 4.7 7.3 5.9 3.8 0.2 -5.3 -4.3 0.2 MIXING RATIO (G/KG) 3.14 3.54 4.19 4.98 6.16 6.81 8.09 7.29 6.34 5.00 3.24 3.58 5.20 VAPOUR PRESSURE (HPA) 4.08 4.60 5.44 6.46 8.00 8.81 10.41 9.43 8.21 6.52 4.24 4.68 6.74 SATURATION DEF. (HPA) 4.01 5.27 8.08 13.99 19.46 27.61 31.99 30.49 24.34 15.01 11.40 8.62 16.69 RELATIVE HUMIDITY (MEAN %) 54 51 46 35 33 26 28 26 29 36 31 40 36 RELATIVE HUMIDITY (MAX. %) 75 74 70 59 50 42 44 42 47 60 52 61 56 RELATIVE HUMIDITY (MIN. %) 38 35 30 24 24 19 19 19 19 24 20 26 25 RELATIVE HUMIDITY (MEAN% 03UTC) 73 72 69 57 50 42 44 42 47 59 52 61 56 RELATIVE HUMIDITY (MEAN% 09UTC) 46 43 38 27 27 21 23 21 23 28 23 30 29 RELATIVE HUMIDITY (MEAN% 15UTC) 51 42 37 30 28 22 22 21 23 30 26 35 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 23.2 46.2 81.0 0.7 0.6 0.0 3.0 1.2 0.2 10.2 0.0 5.0 171.3 DAYS WITH PRECIPITATION >=10 1 2 3 0 0 0 0 0 0 0 0 0 6 DAYS WITH PRECIPITATION >= 5 2 4 4 0 0 0 0 0 0 1 0 0 11 DAYS WITH PRECIPITATION >= 1 4 4 4 0 0 0 1 1 0 2 0 1 17 DAYS WITH PRECIPITATION 6 7 8 4 2 0 2 3 2 3 0 3 40 GREATEST DAILY PRECIPITATION 11.0 20.0 33.0 0.4 0.3 0.0 3.0 1.0 0.2 8.0 0.0 4.0 33.0 DAY 6 12 18 21 14