STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** ***** 22.2 25.0 30.0 27.5 23.1 14.8 11.8 7.1 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** ***** ***** 12.2 15.1 19.7 17.8 12.7 4.9 3.3 1.3 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** **** 0 0 14 9 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** **** 0 0 0 0 0 0 0 0 **** DAYS WITH FREEZING MIN.<= 0 **** **** **** **** 0 0 0 0 0 3 6 13 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** ***** 5.0 10.0 14.0 10.0 6.0 -2.0 -2.0 -3.0 ***** DAY ** ** ** ** 10 14 11 24 25 16 19 17 MAXIMUM AIR TEMPERATURE (C) ***** ***** ***** ***** 29.0 33.0 38.2 36.0 33.1 25.5 22.2 14.7 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** **** **** 13 28 31 31 28 2 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** **** **** 0 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** ***** ***** 33.0 39.0 43.0 41.0 38.0 31.0 27.0 22.0 ***** DAY ** ** ** ** 20 24 22 4 11 1 2 2 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** ***** ***** 16.8 17.9 18.5 18.2 20.4 20.6 18.9 13.4 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** ***** 20.6 24.1 29.0 26.9 22.9 15.2 12.7 8.0 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** ****** ****** 23.0 93.5 247.0 183.5 67.0 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** ****** ****** 9.5 0.0 0.0 0.0 0.0 90.5 159.5 310.0 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** 3.9 4.4 6.2 6.2 6.4 -0.8 -4.3 -0.8 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** 6.07 6.36 7.25 7.21 7.42 4.38 3.38 4.35 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** 8.25 8.60 9.76 9.72 10.04 5.99 4.64 5.94 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** 19.78 24.77 34.73 29.61 20.57 12.61 10.55 4.71 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** 32 28 24 28 36 36 36 62 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** 47 43 35 45 50 53 60 81 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** 22 17 15 17 25 23 18 38 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** 39 32 30 36 44 47 47 72 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** 23 21 17 18 27 25 19 42 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** 29 24 20 22 33 36 36 62 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** ****** 0.0 0.0 0.0 0.0 0.0 0.0 1.0 47.5 ****** DAYS WITH PRECIPITATION >=10 **** **** **** **** 0 0 0 0 0 0 0 2 **** DAYS WITH PRECIPITATION >= 5 **** **** **** **** 0 0 0 0 0 0 0 4 **** DAYS WITH PRECIPITATION >= 1 **** **** **** **** 0 0 0 0 0 0 1 6 **** DAYS WITH PRECIPITATION **** **** **** **** 0 0 0 0 2 1 1 9 **** GREATEST DAILY PRECIPITATION ****** ****** ****** ****** 0.0 0.0 0.0 0.0 0.0 0.0 1.0 23.0 ****** DAY ** ** ** ** ** ** ** ** ** ** 3 20 DAY WITH THUNDER STORM **** **** **** **** 0 0 1 0 0 0 0 0 **** DAYS WITH SNOW OR SLEET **** **** **** **** 0 0 0 0 0 0 0 1 **** DAYS WITH DUST **** **** **** **** 0 0 0 3 0 1 0 0 **** WIND DIRECTION (PREVAILING) *** *** *** *** 90 90 90 90 90 90 90 90 *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** 5.5 6.8 6.1 7.2 4.6 3.5 2.6 3.2 **** PREVAILING WIND PERCENT ***** ***** ***** ***** 29.7 39.6 27.0 24.5 44.2 35.5 30.4 29.0 ***** CALMS PERCENT OF WIND ***** ***** ***** ***** 50.5 46.7 51.6 50.6 25.8 39.5 38.8 33.9 ***** NO. OF WIND OBSERVATION **** **** **** **** 212 240 248 245 240 248 240 248 1921 VECTOR WIND DIRECTION (MEAN) *** *** *** *** 96 87 97 60 71 79 87 112 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** 1.2 2.8 1.3 2.5 2.5 1.1 0.7 0.7 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** 40.0 80.0 44.8 71.4 73.5 47.8 31.8 25.9 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** 3.0 3.5 2.9 3.5 3.4 2.3 2.2 2.7 **** FASTEST WIND DIRECTION *** *** *** *** 180 90 180 310 90 310 50 90 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** 19 15 15 24 12 12 13 20 *** DAY ** ** ** ** 22 5 15 12 1 2 1 31 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** **** 19 24 27 31 28 26 20 12 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** **** 11 6 4 0 2 4 7 13 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** **** 0 0 0 0 0 1 3 6 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** **** 2 0 1 1 0 0 0 0 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 853.5 851.0 847.8 849.2 853.3 857.5 858.1 855.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 858.1 854.8 857.6 877.4 859.6 862.4 862.5 863.3 ****** DAY-HOUR **-** **-** **-** **-** 19-18 2- 6 3-15 17-12 20- 6 18- 6 29- 6 2- 6 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 842.5 845.1 842.0 843.2 848.0 852.9 853.1 846.7 ****** DAY-HOUR **-** **-** **-** **-** 3-12 2-21 29-15 6-15 1-12 7-12 1-12 29-12 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.1 1018.1 1014.5 1016.1 1020.9 1025.6 1026.4 1023.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.4 1022.6 1025.8 1048.7 1028.1 1031.4 1031.5 1032.4 ****** DAY-HOUR **-** **-** **-** **-** 19-18 2- 6 3-15 17-12 20- 6 18- 6 29- 6 2- 6 MIN. 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QNH PRESSURE IN HPA ****** ****** ****** ****** 1017.0 1011.4 1011.4 1011.8 1015.9 1022.4 1022.1 1014.9 ****** DAY ** ** ** ** 14 3 29 7 1 8 3 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.0 1006.3 1000.9 1003.8 1011.9 1022.4 1025.0 1024.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1019.1 1010.3 1008.3 1011.3 1020.6 1028.3 1032.8 1034.0 ****** DAY ** ** ** ** 10 6 10 22 23 17 29 23 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1006.6 999.7 995.4 997.0 1005.5 1012.8 1014.9 1014.1 ****** DAY ** ** ** ** 22 11 22 7 3 8 3 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 854.0 851.7 848.3 849.7 854.2 858.4 859.1 857.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 858.0 854.8 853.0 853.0 859.6 862.4 862.5 863.3 ****** DAY ** ** ** ** 19 2 10 22 20 18 29 2 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 847.6 848.1 844.2 845.3 849.5 855.4 854.6 849.3 ****** DAY ** ** ** ** 3 11 29 7 1 8 3 29 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.7 1019.0 1015.0 1016.7 1021.9 1026.7 1027.6 1025.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.3 1022.6 1020.5 1020.5 1028.1 1031.4 1031.5 1032.4 ****** DAY ** ** ** ** 19 2 10 22 20 18 29 2 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1014.3 1014.8 1010.3 1011.6 1016.4 1023.3 1022.4 1016.2 ****** DAY ** ** ** ** 3 11 29 7 1 8 3 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.1 1006.5 999.7 1002.6 1010.3 1020.5 1023.2 1024.1 ****** MAX. 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QNH PRESSURE IN HPA ****** ****** ****** ****** 1012.7 1011.5 1009.9 1011.6 1014.9 1021.8 1021.4 1014.4 ****** DAY ** ** ** ** 3 2 29 6 1 1 1 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.7 1005.2 998.5 1001.2 1008.0 1017.6 1020.5 1021.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1017.6 1009.1 1006.5 1009.4 1015.9 1023.4 1026.3 1030.7 ****** DAY ** ** ** ** 10 13 10 22 22 18 28 22 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1003.9 999.3 992.3 995.0 1001.3 1011.6 1013.2 1013.9 ****** DAY ** ** ** ** 23 10 22 8 1 7 2 29 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 852.3 850.2 846.9 848.8 851.9 856.1 856.8 855.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 856.2 853.3 851.5 877.4 857.6 859.8 860.8 861.3 ****** DAY ** ** ** ** 11 2 10 17 20 18 16 22 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 842.5 846.5 843.0 843.2 848.0 852.9 853.1 846.7 ****** DAY ** ** ** ** 3 11 29 7 1 7 1 29 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1019.7 1017.2 1013.5 1015.7 1019.3 1024.0 1024.8 1022.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1024.2 1020.8 1018.8 1048.7 1025.8 1028.4 1029.5 1030.1 ****** DAY ** ** ** ** 11 2 10 17 20 18 16 22 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1008.4 1013.0 1008.9 1009.2 1014.7 1020.4 1020.6 1013.2 ****** DAY ** ** ** ** 3 11 29 7 1 7 1 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1009.5 1005.3 998.4 1002.1 1007.7 1017.5 1020.6 1021.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1016.3 1010.2 1005.6 1035.3 1015.5 1023.3 1026.9 1030.2 ****** DAY ** ** ** ** 11 2 10 17 21 22 28 22 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 997.2 998.8 992.4 992.6 1002.4 1011.0 1013.3 1013.5 ****** DAY ** ** ** ** 3 10 22 7 1 7 2 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 852.8 850.3 847.2 848.3 852.5 857.0 857.5 855.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 856.3 852.9 857.6 852.4 857.7 860.8 861.4 862.1 ****** DAY ** ** ** ** 10 5 3 21 22 18 16 2 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 847.3 846.3 842.0 843.2 849.1 853.0 854.1 848.2 ****** DAY ** ** ** ** 25 11 29 6 1 7 1 29 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1020.3 1017.3 1013.8 1015.0 1020.0 1025.1 1025.7 1023.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1024.3 1020.4 1025.8 1019.8 1025.9 1029.5 1030.2 1031.0 ****** DAY ** ** ** ** 10 5 3 21 22 18 16 2 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1013.9 1012.7 1007.8 1009.2 1016.0 1020.5 1021.8 1014.9 ****** DAY ** ** ** ** 25 11 29 6 1 7 1 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.4 1005.2 999.3 1002.2 1010.1 1021.0 1023.6 1023.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1017.9 1009.0 1011.2 1010.5 1018.7 1027.4 1031.5 1033.7 ****** DAY ** ** ** ** 10 2 3 21 22 18 28 22 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1003.8 998.6 992.1 993.9 1004.3 1012.2 1015.2 1014.9 ****** DAY ** ** ** ** 23 11 29 6 2 1 2 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 854.1 851.4 847.9 849.7 853.7 857.8 858.4 856.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 858.1 854.4 852.3 853.6 858.9 861.5 861.8 862.5 ****** DAY ** ** ** ** 19 2 9 21 20 18 28 22 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 849.0 847.6 844.4 846.3 850.2 853.6 855.2 849.2 ****** DAY ** ** ** ** 22 10 21 6 1 7 2 29 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.8 1018.6 1014.6 1016.7 1021.3 1026.1 1026.7 1024.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.4 1022.1 1019.7 1021.2 1027.3 1030.3 1030.7 1031.5 ****** DAY ** ** ** ** 19 2 9 21 20 18 28 22 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.9 1014.3 1010.6 1012.7 1017.3 1021.2 1023.0 1016.1 ****** DAY ** ** ** ** 22 10 21 6 1 7 2 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.5 1006.2 999.4 1002.8 1009.8 1020.0 1022.4 1023.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1019.1 1012.1 1006.5 1011.2 1018.4 1026.1 1028.6 1033.3 ****** DAY ** ** ** ** 9 2 10 21 22 14 28 22 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.3 998.8 994.0 996.1 1003.6 1010.4 1013.8 1015.7 ****** DAY ** ** ** ** 22 10 22 7 10 7 2 12 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 854.2 851.0 848.0 849.6 853.8 857.8 858.4 855.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 857.8 854.2 852.5 853.3 858.5 861.3 862.3 863.0 ****** DAY ** ** ** ** 19 1 9 21 20 22 28 22 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.6 999.1 993.6 995.5 1003.5 1009.7 1014.6 1014.3 ****** DAY ** ** ** ** 23 10 21 6 10 7 2 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.5 8.0 12.2 20.5 28.4 25.9 29.4 24.8 22.8 15.3 11.0 5.1 17.3 MINIMUN AIR TEMPERATURE (C) -2.3 0.4 6.4 10.9 13.4 15.9 21.8 15.6 13.6 4.5 1.6 -0.2 8.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 0 23 2 0 0 0 0 26 DAYS WITH MINIMUM TEMP. <=-4 15 7 0 0 0 0 0 0 0 0 0 7 29 DAYS WITH FREEZING MIN.<= 0 25 15 1 2 0 0 0 0 0 2 8 17 70 TEMPERATURE RECORDS LOWEST(C) -6.0 -7.0 0.0 -2.0 6.0 11.0 18.0 9.0 9.0 0.0 -3.0 -6.0 -7.0 DAY 20 14 15 3 3 6 1 29 22 2 5 21 MAXIMUM AIR TEMPERATURE (C) 11.0 16.3 17.5 ***** 34.0 34.5 37.3 32.7 32.3 27.3 22.1 12.6 ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 0 **** 27 30 31 28 26 11 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 **** 0 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C) 18.0 24.0 25.0 ***** 39.0 40.0 43.0 37.0 35.0 32.0 26.0 19.0 ***** DAY 31 8 30 ** 29 2 10 25 12 20 7 1 DIF. BETWEEN (MAX.-MIN.) (C) 13.3 15.9 11.1 ***** 20.6 18.6 15.5 17.1 18.7 22.8 20.5 12.8 ***** MEAN DAILY TEMP. (MDT) (C) 4.3 8.4 11.9 ***** 23.7 25.2 29.6 24.2 22.9 15.9 11.8 6.2 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 88.5 127.5 265.5 103.5 62.5 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 423.5 279.0 193.0 0.0 1.0 0.0 0.0 0.0 0.0 73.0 184.5 365.0 ****** DEWPOINT (MEAN C) -4.2 -4.9 3.1 4.6 ***** 3.5 6.0 2.1 3.0 -4.6 -5.6 -5.3 ***** MIXING RATIO (G/KG) 3.43 3.36 5.78 6.54 ****** 5.91 7.14 5.38 5.81 3.28 3.01 3.22 ****** VAPOUR PRESSURE (HPA) 4.69 4.58 7.84 8.86 ****** 8.01 9.62 7.30 7.88 4.50 4.13 4.41 ****** SATURATION DEF. (HPA) 3.66 7.12 7.17 16.87 ****** 27.67 33.12 25.45 21.78 15.02 10.39 4.98 ****** RELATIVE HUMIDITY (MEAN %) 61 44 58 39 *** 25 25 24 29 28 33 52 *** RELATIVE HUMIDITY (MAX. %) 79 69 77 58 *** 39 38 37 44 44 48 70 *** RELATIVE HUMIDITY (MIN. %) 38 24 39 28 *** 16 15 16 18 15 19 33 *** RELATIVE HUMIDITY (MEAN% 03UTC) 72 61 73 58 *** 32 31 30 36 36 43 63 *** RELATIVE HUMIDITY (MEAN% 09UTC) 42 27 46 29 *** 17 16 17 20 16 20 38 *** RELATIVE HUMIDITY (MEAN% 15UTC) 59 37 *** *** *** 21 20 19 26 29 34 53 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 28.0 4.0 68.0 8.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21.7 129.7 DAYS WITH PRECIPITATION >=10 1 0 2 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 2 0 6 1 0 0 0 0 0 0 0 2 11 DAYS WITH PRECIPITATION >= 1 3 3 12 1 0 0 0 0 0 0 0 4 23 DAYS WITH PRECIPITATION 5 5 12 1 0 0 0 0 0 0 0 8 31 GREATEST DAILY PRECIPITATION 16.0 2.0 17.0 8.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 17.0 DAY 16 27 18 6 ** ** ** ** ** ** ** 23 DAY WITH THUNDER STORM 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 1 1 2 DAYS WITH DUST 0 1 1 0 0 0 5 2 1 0 0 1 11 WIND DIRECTION (PREVAILING) 90 270 270 270 270 45 45 45 90 90 270 270 45 PREVAILING WIND SPEED(KNOTS) 3.5 4.6 5.9 5.0 5.6 5.7 7.5 7.8 5.5 3.7 6.1 6.5 6.4 PREVAILING WIND PERCENT 20.2 18.3 16.4 15.0 21.0 27.9 38.7 49.2 32.1 25.8 12.1 10.1 19.4 CALMS PERCENT OF WIND 37.1 26.5 43.0 61.7 66.1 32.5 25.0 10.5 17.9 36.3 54.6 66.9 37.6 NO. OF WIND OBSERVATION 248 230 165 120 124 240 248 248 240 248 240 248 2599 VECTOR WIND DIRECTION (MEAN) 95 295 222 231 262 31 63 57 58 84 352 317 52 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.8 1.4 1.3 1.1 2.3 4.6 5.2 2.8 0.7 0.2 0.3 1.0 WIND STEADINESES (MEAN %) 20.8 23.5 40.0 61.9 55.0 60.5 92.0 88.1 58.3 25.9 9.1 18.8 30.3 WIND SPEED (MEAN KNOTS) 2.4 3.4 3.5 2.1 2.0 3.8 5.0 5.9 4.8 2.7 2.2 1.6 3.3 FASTEST WIND DIRECTION 130 50 180 230 50 360 90 50 50 230 90 50 90 FASTEST WIND SPEED (KNOTS) 13 18 18 13 12 18 25 25 22 16 18 16 25 DAY 15 29 3 30 27 9 3 13 28 31 9 9 DAYS WITH SKY CLEAR (0-2)/8 19 10 10 9 30 27 27 30 25 28 20 10 245 DAYS WITH P.CLOUDY (3-6)/8 9 11 8 12 1 3 2 1 5 3 10 11 76 DAYS WITH CLOUDY (7-8)/8 3 8 13 9 0 0 2 0 0 0 0 10 45 DAYS WITH VISIBILITY =< 2 KM 1 1 4 0 0 0 1 0 0 0 1 0 8 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 854.9 854.8 852.3 852.0 851.3 850.8 848.0 851.2 852.8 857.2 858.8 858.0 853.5 MAX. QFE PRESSURE IN HPA 861.6 861.2 858.5 860.0 856.7 856.0 852.8 857.1 857.4 863.2 864.3 864.2 864.3 DAY-HOUR 26- 6 13- 6 6- 6 2- 6 12- 6 11-21 24-18 30-18 29- 6 25-21 20- 6 3- 6 MIN. QFE PRESSURE IN HPA 845.0 844.9 843.6 846.0 844.8 845.0 843.2 844.8 847.9 852.2 852.1 851.9 843.2 DAY-HOUR 15-21 11-21 23-12 6-12 27-12 28-12 22-12 4-12 12-12 28-12 8-12 11- 0 MEAN QNH PRESSURE IN HPA 1022.7 1022.5 1019.7 1019.4 1018.6 1018.0 1014.7 1018.5 1020.3 1025.4 1027.2 1026.3 1021.1 MAX. QNH PRESSURE IN HPA 1030.4 1030.0 1026.9 1028.6 1024.8 1024.0 1020.3 1025.2 1025.6 1032.3 1033.6 1033.4 1033.6 DAY-HOUR 26- 6 13- 6 6- 6 2- 6 12- 6 11-21 24-18 30-18 29- 6 25-21 20- 6 3- 6 MIN. QNH PRESSURE IN HPA 1011.2 1011.1 1009.6 1012.4 1011.0 1011.2 1009.2 1011.0 1014.6 1019.6 1019.5 1019.2 1009.2 DAY-HOUR 15-21 11-21 23-12 6-12 27-12 28-12 22-12 4-12 12-12 28-12 8-12 11- 0 MEAN QFF PRESSURE IN HPA 1023.9 1020.9 ****** ****** ****** 1005.3 999.9 1006.4 1009.4 1019.3 1023.9 1026.6 ****** MAX. QFF PRESSURE IN HPA 1033.9 1034.0 ****** ****** ****** 1012.8 1007.6 1015.5 1017.9 1027.8 1030.5 1035.7 ****** DAY-HOUR 20- 6 13-18 **-** **-** **-** 7- 3 25- 3 31- 0 29- 3 26- 3 20- 6 25- 6 MIN. QFF PRESSURE IN HPA 1008.8 1005.9 ****** ****** ****** 995.9 993.2 998.1 1002.2 1012.2 1012.5 1014.0 ****** DAY-HOUR 15-21 11-21 **-** **-** **-** 28-12 22-12 4-12 12-21 17-12 8- 9 10-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 854.9 854.6 ****** ****** ****** 851.0 848.3 851.4 852.9 857.3 858.7 857.9 ****** MAX. QFE PRESSURE IN HPA 860.3 860.4 ****** ****** ****** 856.0 852.3 856.6 856.2 862.3 862.5 863.1 ****** DAY 27 5 ** ** ** 12 25 31 30 26 21 3 MIN. QFE PRESSURE IN HPA 846.7 848.0 ****** ****** ****** 846.6 845.7 847.2 849.2 853.0 854.0 851.9 ****** DAY 16 1 ** ** ** 4 23 4 13 29 8 11 MEAN QNH PRESSURE IN HPA 1022.6 1022.4 ****** ****** ****** 1018.2 1015.0 1018.6 1020.4 1025.5 1027.1 1026.2 ****** MAX. QNH PRESSURE IN HPA 1028.9 1029.1 ****** ****** ****** 1024.0 1019.7 1024.7 1024.2 1031.3 1031.5 1032.2 ****** DAY 27 5 ** ** ** 12 25 31 30 26 21 3 MIN. QNH PRESSURE IN HPA 1013.2 1014.7 ****** ****** ****** 1013.1 1012.1 1013.8 1016.1 1020.5 1021.7 1019.2 ****** DAY 16 1 ** ** ** 4 23 4 13 29 8 11 MEAN QFF PRESSURE IN HPA 1023.4 1020.4 ****** ****** ****** 1005.9 1000.1 1006.6 1009.3 1018.9 1023.2 1025.8 ****** MAX. QFF PRESSURE IN HPA 1031.5 1032.1 ****** ****** ****** 1012.3 1006.1 1015.5 1016.3 1026.4 1028.1 1034.0 ****** DAY 20 14 ** ** ** 7 25 31 30 26 16 21 MIN. QFF PRESSURE IN HPA 1011.8 1010.0 ****** ****** ****** 998.8 996.0 1000.8 1002.7 1014.8 1015.2 1014.1 ****** DAY 16 12 ** ** ** 28 11 5 13 18 8 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 854.9 855.0 851.5 852.4 851.7 851.5 848.8 851.9 853.6 857.8 859.2 858.1 853.9 MAX. QFE PRESSURE IN HPA 860.3 860.0 857.0 858.3 856.0 855.9 852.8 856.9 856.9 862.4 862.4 863.4 863.4 DAY 21 5 6 2 12 12 25 31 29 26 20 3 MIN. QFE PRESSURE IN HPA 848.6 849.1 845.0 846.3 846.2 847.0 846.4 847.9 849.9 853.8 854.0 852.7 845.0 DAY 16 24 18 1 1 28 11 4 13 29 8 11 MEAN QNH PRESSURE IN HPA 1022.7 1022.8 1018.8 1019.8 1019.0 1018.7 1015.6 1019.3 1021.2 1026.0 1027.6 1026.4 1021.5 MAX. QNH PRESSURE IN HPA 1028.9 1028.6 1025.1 1026.6 1024.0 1023.9 1020.3 1025.0 1025.0 1031.4 1031.4 1032.5 1032.5 DAY 21 5 6 2 12 12 25 31 29 26 20 3 MIN. QNH PRESSURE IN HPA 1015.4 1016.0 1011.2 1012.7 1012.6 1013.6 1012.9 1014.6 1016.9 1021.4 1021.7 1020.2 1011.2 DAY 16 24 18 1 1 28 11 4 13 29 8 11 MEAN QFF PRESSURE IN HPA 1025.2 1022.5 ****** ****** ****** 1006.6 1001.3 1007.9 1011.3 1022.0 1026.6 1027.9 ****** MAX. QFF PRESSURE IN HPA 1033.7 1033.9 ****** ****** ****** 1012.8 1007.6 1015.5 1017.9 1027.8 1030.5 1034.9 ****** DAY 21 14 ** ** ** 7 25 31 29 26 14 21 MIN. QFF PRESSURE IN HPA 1013.5 1011.7 ****** ****** ****** 999.9 996.7 1002.8 1005.2 1018.4 1017.4 1017.1 ****** DAY 16 24 ** ** ** 28 11 4 13 17 8 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 856.2 856.0 852.5 852.8 851.9 851.6 848.7 851.9 853.8 858.3 860.0 859.1 854.4 MAX. QFE PRESSURE IN HPA 861.6 861.2 858.5 860.0 856.7 855.8 852.7 856.7 857.4 862.5 864.3 864.2 864.3 DAY 26 13 6 2 12 11 25 31 29 26 20 3 MIN. QFE PRESSURE IN HPA 850.3 849.3 845.1 846.5 846.0 847.8 846.1 847.8 850.8 854.2 854.0 854.0 845.1 DAY 1 24 18 1 1 4 22 4 13 29 8 9 MEAN QNH PRESSURE IN HPA 1024.2 1024.0 1019.9 1020.3 1019.3 1018.9 1015.6 1019.2 1021.5 1026.6 1028.6 1027.5 1022.1 MAX. QNH PRESSURE IN HPA 1030.4 1030.0 1026.9 1028.6 1024.8 1023.7 1020.2 1024.8 1025.6 1031.5 1033.6 1033.4 1033.6 DAY 26 13 6 2 12 11 25 31 29 26 20 3 MIN. QNH PRESSURE IN HPA 1017.4 1016.2 1011.4 1013.0 1012.4 1014.5 1012.5 1014.5 1018.0 1021.9 1021.7 1021.7 1011.4 DAY 1 24 18 1 1 4 22 4 13 29 8 9 MEAN QFF PRESSURE IN HPA 1025.6 1022.6 ****** ****** ****** 1005.9 1000.7 1007.1 1010.4 1020.1 1025.1 1028.1 ****** MAX. QFF PRESSURE IN HPA 1033.9 1032.9 ****** ****** ****** 1011.9 1007.2 1014.9 1017.3 1025.9 1030.5 1035.7 ****** DAY 20 13 ** ** ** 8 25 30 29 26 20 25 MIN. QFF PRESSURE IN HPA 1015.9 1011.9 ****** ****** ****** 998.8 995.9 1001.3 1004.7 1015.8 1015.3 1018.1 ****** DAY 15 24 ** ** ** 29 11 5 13 17 8 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 854.7 854.8 851.9 852.0 851.3 850.7 847.8 850.8 852.5 856.9 858.7 858.0 853.3 MAX. QFE PRESSURE IN HPA 860.9 860.0 858.2 859.6 855.6 855.3 851.2 855.6 855.7 861.1 863.1 863.0 863.1 DAY 26 13 6 2 12 11 30 30 20 26 20 3 MIN. QFE PRESSURE IN HPA 848.5 847.8 844.6 846.6 845.8 846.5 845.0 846.5 849.2 852.3 852.4 853.5 844.6 DAY 15 24 24 6 1 29 22 4 12 29 8 9 MEAN QNH PRESSURE IN HPA 1022.4 1022.6 1019.3 1019.4 1018.5 1017.9 1014.5 1018.0 1019.9 1025.0 1027.1 1026.3 1020.9 MAX. QNH PRESSURE IN HPA 1029.6 1028.6 1026.5 1028.1 1023.5 1023.2 1018.4 1023.5 1023.6 1029.9 1032.2 1032.1 1032.2 DAY 26 13 6 2 12 11 30 30 20 26 20 3 MIN. QNH PRESSURE IN HPA 1015.3 1014.5 1010.8 1013.1 1012.2 1013.0 1011.2 1013.0 1016.1 1019.7 1019.8 1021.1 1010.8 DAY 15 24 24 6 1 29 22 4 12 29 8 9 MEAN QFF PRESSURE IN HPA 1022.7 1019.5 ****** ****** ****** 1004.8 999.3 1005.4 1008.1 1017.5 1022.1 1025.5 ****** MAX. QFF PRESSURE IN HPA 1031.1 1030.9 ****** ****** ****** 1012.6 1004.1 1013.2 1014.8 1023.3 1027.7 1033.3 ****** DAY 20 13 ** ** ** 6 25 31 30 26 20 25 MIN. QFF PRESSURE IN HPA 1011.6 1008.2 ****** ****** ****** 996.8 994.1 1000.2 1003.1 1012.7 1012.5 1016.7 ****** DAY 15 24 ** ** ** 29 11 4 13 17 8 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 854.1 853.7 850.9 850.8 850.4 849.8 846.5 849.9 851.5 856.0 857.6 857.1 852.4 MAX. QFE PRESSURE IN HPA 860.1 858.9 857.0 858.0 854.0 854.3 850.8 855.5 855.3 860.0 862.5 862.0 862.5 DAY 26 13 6 2 12 7 30 30 20 26 20 24 MIN. QFE PRESSURE IN HPA 847.2 847.1 843.6 846.0 844.8 845.0 843.2 844.8 847.9 852.2 852.1 852.0 843.2 DAY 31 24 23 6 27 28 22 4 12 28 8 8 MEAN QNH PRESSURE IN HPA 1021.8 1021.3 1018.1 1018.0 1017.5 1016.8 1013.0 1016.9 1018.7 1023.9 1025.8 1025.2 1019.8 MAX. QNH PRESSURE IN HPA 1028.7 1027.3 1025.1 1026.3 1021.7 1022.0 1018.0 1023.4 1023.2 1028.6 1031.5 1030.9 1031.5 DAY 26 13 6 2 12 7 30 30 20 26 20 24 MIN. QNH PRESSURE IN HPA 1013.8 1013.7 1009.6 1012.4 1011.0 1011.2 1009.2 1011.0 1014.6 1019.6 1019.5 1019.3 1009.2 DAY 31 24 23 6 27 28 22 4 12 28 8 8 MEAN QFF PRESSURE IN HPA 1022.4 1019.2 ****** ****** ****** 1004.2 998.0 1004.8 1007.5 1017.2 1021.8 1024.9 ****** MAX. QFF PRESSURE IN HPA 1030.8 1029.2 ****** ****** ****** 1011.5 1004.0 1014.4 1013.9 1022.7 1027.4 1032.8 ****** DAY 20 13 ** ** ** 6 30 30 30 26 20 24 MIN. QFF PRESSURE IN HPA 1011.1 1007.4 ****** ****** ****** 995.9 993.2 998.1 1002.4 1012.2 1012.9 1015.1 ****** DAY 31 24 ** ** ** 28 22 4 13 17 8 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 854.5 854.3 ****** ****** ****** 849.8 846.7 850.4 852.1 856.6 858.4 857.8 ****** MAX. QFE PRESSURE IN HPA 860.8 859.5 ****** ****** ****** 854.5 850.6 856.2 855.8 860.5 862.7 862.2 ****** DAY 26 13 ** ** ** 7 30 30 20 26 20 24 MIN. QFE PRESSURE IN HPA 847.2 847.1 ****** ****** ****** 845.2 843.6 845.3 848.3 853.4 853.4 852.6 ****** DAY 15 29 ** ** ** 3 22 4 12 28 8 8 MEAN QNH PRESSURE IN HPA 1022.3 1022.0 ****** ****** ****** 1016.8 1013.2 1017.4 1019.4 1024.6 1026.7 1026.0 ****** MAX. QNH PRESSURE IN HPA 1029.5 1028.0 ****** ****** ****** 1022.2 1017.7 1024.2 1023.7 1029.2 1031.7 1031.1 ****** DAY 26 13 ** ** ** 7 30 30 20 26 20 24 MIN. QNH PRESSURE IN HPA 1013.8 1013.7 ****** ****** ****** 1011.5 1009.6 1011.6 1015.1 1021.0 1021.0 1020.0 ****** DAY 15 29 ** ** ** 3 22 4 12 28 8 8 MEAN QFF PRESSURE IN HPA 1024.6 1021.7 ****** ****** ****** 1004.6 999.0 1006.0 1009.4 1020.5 1025.5 1027.6 ****** MAX. QFF PRESSURE IN HPA 1033.5 1032.1 ****** ****** ****** 1011.9 1004.8 1015.0 1016.1 1025.7 1029.6 1034.8 ****** DAY 20 13 ** ** ** 7 31 30 29 30 20 24 MIN. QFF PRESSURE IN HPA 1009.5 1010.2 ****** ****** ****** 997.3 994.1 999.9 1004.6 1017.1 1017.2 1017.1 ****** DAY 15 24 ** ** ** 28 10 4 12 22 8 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 855.1 855.1 ****** ****** ****** 851.1 848.6 851.9 853.3 857.6 859.1 858.4 ****** MAX. QFE PRESSURE IN HPA 861.3 860.7 ****** ****** ****** 855.6 852.8 857.1 856.7 863.1 863.4 863.3 ****** DAY 26 13 ** ** ** 8 24 30 29 25 20 2 MIN. QFE PRESSURE IN HPA 847.0 847.9 ****** ****** ****** 846.5 845.4 847.2 849.6 854.0 854.0 853.1 ****** DAY 15 29 ** ** ** 3 19 4 12 28 8 10 MEAN QNH PRESSURE IN HPA 1023.0 1023.0 ****** ****** ****** 1018.3 1015.4 1019.2 1020.8 1025.8 1027.5 1026.8 ****** MAX. QNH PRESSURE IN HPA 1030.1 1029.4 ****** ****** ****** 1023.5 1020.3 1025.2 1024.8 1032.2 1032.5 1032.4 ****** DAY 26 13 ** ** ** 8 24 30 29 25 20 2 MIN. QNH PRESSURE IN HPA 1013.6 1014.6 ****** ****** ****** 1013.0 1011.7 1013.8 1016.6 1021.7 1021.7 1020.6 ****** DAY 15 29 ** ** ** 3 19 4 12 28 8 10 MEAN QFF PRESSURE IN HPA 1024.4 1021.5 ****** ****** ****** 1005.4 1000.6 1007.2 1010.0 1019.5 1024.0 1027.4 ****** MAX. QFF PRESSURE IN HPA 1033.7 1034.0 ****** ****** ****** 1012.6 1006.7 1015.2 1017.5 1026.5 1029.9 1035.3 ****** DAY 20 13 ** ** ** 8 24 30 29 25 20 20 MIN. QFF PRESSURE IN HPA 1009.4 1010.1 ****** ****** ****** 997.5 995.4 1001.2 1004.4 1013.7 1015.1 1017.2 ****** DAY 15 8 ** ** ** 2 19 4 12 18 8 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 854.9 854.5 ****** ****** ****** 851.1 848.6 851.8 853.1 857.5 859.2 858.1 ****** MAX. QFE PRESSURE IN HPA 861.3 860.5 ****** ****** ****** 856.0 852.5 856.8 856.7 863.2 863.3 863.1 ****** DAY 26 13 ** ** ** 11 24 30 5 25 20 2 MIN. QFE PRESSURE IN HPA 845.0 844.9 ****** ****** ****** 846.7 845.8 847.3 849.4 853.4 854.8 852.2 ****** DAY 15 11 ** ** ** 3 22 4 12 28 7 10 MEAN QNH PRESSURE IN HPA 1022.7 1022.3 ****** ****** ****** 1018.3 1015.4 1019.2 1020.6 1025.8 1027.6 1026.5 ****** MAX. QNH PRESSURE IN HPA 1030.1 1029.2 ****** ****** ****** 1024.0 1019.9 1024.9 1024.8 1032.3 1032.4 1032.2 ****** DAY 26 13 ** ** ** 11 24 30 5 25 20 2 MIN. QNH PRESSURE IN HPA 1011.2 1011.1 ****** ****** ****** 1013.2 1012.2 1013.9 1016.3 1021.0 1022.6 1019.6 ****** DAY 15 11 ** ** ** 3 22 4 12 28 7 10 MEAN QFF PRESSURE IN HPA 1023.0 1019.5 ****** ****** ****** 1005.2 1000.2 1006.7 1009.0 1018.4 1022.8 1025.8 ****** MAX. QFF PRESSURE IN HPA 1031.9 1032.7 ****** ****** ****** 1012.2 1006.2 1014.8 1016.3 1026.3 1028.2 1034.0 ****** DAY 19 13 ** ** ** 7 31 30 30 25 20 20 MIN. QFF PRESSURE IN HPA 1008.8 1005.9 ****** ****** ****** 998.3 995.0 1000.9 1002.2 1012.3 1016.1 1014.0 ****** DAY 15 11 ** ** ** 27 10 4 12 18 7 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 5.0 11.8 13.4 19.7 24.5 26.7 24.9 20.0 15.7 8.5 4.7 14.8 MINIMUN AIR TEMPERATURE (C) -1.0 -0.8 4.8 7.0 12.4 15.8 18.2 15.5 9.3 6.6 2.9 -0.8 7.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 6 4 0 0 0 0 12 DAYS WITH MINIMUM TEMP. <=-4 9 9 0 0 0 0 0 0 0 0 1 6 25 DAYS WITH FREEZING MIN.<= 0 21 20 1 2 0 0 0 0 0 2 9 21 76 TEMPERATURE RECORDS LOWEST(C) -5.0 -6.0 -1.0 -2.0 6.0 10.0 13.0 8.0 5.0 -1.0 -6.0 -9.0 -9.0 DAY 9 7 10 6 13 9 1 31 4 23 25 30 MAXIMUM AIR TEMPERATURE (C) 7.9 12.5 19.3 20.2 27.3 32.3 35.1 33.6 29.7 25.6 15.5 12.4 22.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 6 27 31 27 19 9 0 0 119 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 22.0 24.0 26.0 35.0 38.0 41.0 40.0 32.0 32.0 23.0 18.0 41.0 DAY 31 26 6 21 29 5 17 10 13 1 4 20 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 13.3 14.5 13.2 14.9 16.5 16.9 18.1 20.4 19.0 12.6 13.2 15.1 MEAN DAILY TEMP. (MDT) (C) 3.5 5.8 12.0 13.6 19.8 24.0 26.6 24.5 19.5 16.1 9.2 5.8 15.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 21.5 96.0 174.0 112.5 3.5 1.5 0.0 0.0 409.0 HEATING DEG. DAYS(BASE 18 0C) 450.0 341.0 184.5 132.0 14.5 0.0 0.0 0.0 3.0 80.5 264.0 378.0 1847.5 DEWPOINT (MEAN C) -1.6 -3.5 1.7 3.5 7.3 7.8 9.2 6.8 4.0 2.5 2.0 -1.0 3.2 MIXING RATIO (G/KG) 4.10 3.63 5.26 5.98 7.77 7.93 8.87 7.49 6.30 5.53 5.34 4.35 6.04 VAPOUR PRESSURE (HPA) 5.59 4.96 7.15 8.12 10.52 10.71 11.94 10.12 8.56 7.55 7.29 5.94 8.20 SATURATION DEF. (HPA) 2.27 4.47 7.41 8.11 13.78 21.57 25.03 23.37 16.81 12.31 4.61 3.17 11.91 RELATIVE HUMIDITY (MEAN %) 74 59 54 55 48 36 35 33 37 44 67 70 51 RELATIVE HUMIDITY (MAX. %) 89 82 81 76 66 53 47 47 49 62 85 88 69 RELATIVE HUMIDITY (MIN. %) 53 35 32 35 32 24 24 23 26 27 45 45 33 RELATIVE HUMIDITY (MEAN% 03UTC) 80 74 72 67 53 42 41 42 44 55 75 85 61 RELATIVE HUMIDITY (MEAN% 09UTC) 58 40 37 40 36 28 26 24 28 28 50 48 37 RELATIVE HUMIDITY (MEAN% 15UTC) 75 57 46 50 49 30 30 28 36 46 72 71 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 90.0 47.4 36.0 55.7 82.3 2.0 0.0 0.0 0.0 0.0 47.6 21.0 382.0 DAYS WITH PRECIPITATION >=10 3 2 0 2 2 0 0 0 0 0 3 0 12 DAYS WITH PRECIPITATION >= 5 6 2 4 3 2 0 0 0 0 0 4 2 23 DAYS WITH PRECIPITATION >= 1 9 4 6 9 5 1 0 0 0 0 8 4 46 DAYS WITH PRECIPITATION 11 5 7 14 8 1 0 0 0 1 13 6 66 GREATEST DAILY PRECIPITATION 25.6 25.0 9.0 17.0 52.0 2.0 0.0 0.0 0.0 0.0 12.0 8.0 52.0 DAY 23 5 17 4 2 7 ** ** ** ** 19 10 DAY WITH THUNDER STORM 0 0 3 4 7 1 0 0 0 0 0 0 15 DAYS WITH SNOW OR SLEET 4 0 0 0 0 0 0 0 0 0 1 1 6 DAYS WITH DUST 2 2 0 0 0 0 4 3 0 0 0 0 11 WIND DIRECTION (PREVAILING) 90 270 90 45 90 90 90 90 90 90 90 270 90 PREVAILING WIND SPEED(KNOTS) 4.6 6.9 4.1 6.4 6.9 9.4 9.5 7.1 4.4 3.9 2.9 5.0 6.4 PREVAILING WIND PERCENT 13.8 12.5 14.5 22.5 25.4 32.1 35.9 29.8 19.6 17.3 19.2 12.5 20.3 CALMS PERCENT OF WIND 55.1 57.6 33.5 40.0 35.9 20.8 19.0 31.5 47.9 29.4 41.7 53.6 38.7 NO. OF WIND OBSERVATION 247 224 248 240 248 240 248 248 240 248 240 248 2919 VECTOR WIND DIRECTION (MEAN) 129 40 245 82 87 84 87 87 70 41 56 25 85 VECTOR WIND MAGNITUDE(KNOTS) 1.1 0.2 0.6 2.1 2.0 4.8 5.5 3.9 1.6 0.3 0.5 0.3 1.8 WIND STEADINESES (MEAN %) 35.5 6.9 13.6 48.8 46.5 68.6 82.1 83.0 66.7 9.1 21.7 15.0 46.2 WIND SPEED (MEAN KNOTS) 3.1 2.9 4.4 4.3 4.3 7.0 6.7 4.7 2.4 3.3 2.3 2.0 3.9 FASTEST WIND DIRECTION 180 230 230 130 90 90 90 90 50 50 310 50 90 FASTEST WIND SPEED (KNOTS) 23 25 25 23 22 27 23 22 18 16 15 16 27 DAY 20 5 15 7 12 20 29 6 23 2 8 20 DAYS WITH SKY CLEAR (0-2)/8 7 15 8 7 10 29 26 27 30 24 9 14 206 DAYS WITH P.CLOUDY (3-6)/8 8 9 18 13 18 1 4 4 0 7 11 14 107 DAYS WITH CLOUDY (7-8)/8 16 4 5 10 3 0 1 0 0 0 10 3 52 DAYS WITH VISIBILITY =< 2 KM 2 1 0 2 0 0 0 0 0 0 0 0 5 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 854.0 855.9 853.8 853.8 853.0 851.7 849.7 851.8 855.5 857.9 858.1 857.0 854.4 MAX. QFE PRESSURE IN HPA 867.0 863.0 860.7 861.0 857.8 856.0 854.4 855.7 858.3 862.1 863.6 863.6 867.0 DAY-HOUR 3- 0 13- 6 22- 6 17- 6 11-18 18- 3 6- 3 31- 6 9- 6 19- 6 24-18 30- 6 MIN. QFE PRESSURE IN HPA 841.1 843.0 841.5 848.1 848.8 841.6 841.7 844.2 851.2 852.5 850.5 847.2 841.1 DAY-HOUR 21- 6 5- 9 16-21 4-21 8-12 14- 0 13-12 8-12 28-12 10-12 18-18 7- 9 MEAN QNH PRESSURE IN HPA 1021.7 1023.9 1021.4 1021.4 1020.5 1019.0 1016.7 1019.2 1023.4 1026.2 1026.4 1025.1 1022.1 MAX. QNH PRESSURE IN HPA 1036.7 1032.1 1029.4 1029.8 1026.1 1024.0 1022.1 1023.6 1026.6 1031.0 1032.8 1032.8 1036.7 DAY-HOUR 3- 0 13- 6 22- 6 17- 6 11-18 18- 3 6- 3 31- 6 9- 6 19- 6 24-18 30- 6 MIN. QNH PRESSURE IN HPA 1006.7 1008.9 1007.2 1014.8 1015.6 1007.3 1007.4 1010.3 1018.4 1019.9 1017.6 1013.8 1006.7 DAY-HOUR 21- 6 5- 9 16-21 4-21 8-12 14- 0 13-12 8-12 28-12 10-12 18-18 7- 9 MEAN QFF PRESSURE IN HPA 1023.1 1024.1 1017.2 1016.1 1011.2 1007.0 1003.2 1006.9 1014.1 1019.5 1024.3 1025.5 1016.0 MAX. QFF PRESSURE IN HPA 1039.3 1035.8 1027.0 1025.1 1018.0 1011.5 1011.3 1015.2 1019.0 1028.9 1037.4 1038.6 1039.3 DAY-HOUR 3- 0 9- 3 1- 3 16-15 12- 6 2- 6 6- 3 31- 3 24- 3 31-15 25- 3 30- 3 MIN. QFF PRESSURE IN HPA 1005.1 1007.7 1001.7 1009.2 1002.3 994.6 991.2 996.5 1007.9 1009.3 1012.8 1009.9 991.2 DAY-HOUR 21- 6 5- 9 16-21 1- 9 30-12 7- 0 13-12 8-12 28-18 10-18 18-18 7- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 854.1 855.5 853.6 853.2 852.9 851.6 849.8 852.0 855.4 857.8 858.0 856.8 854.2 MAX. QFE PRESSURE IN HPA 867.0 861.9 858.8 858.1 856.2 855.0 853.6 855.2 857.6 861.4 862.9 862.6 867.0 DAY 3 9 2 16 12 18 27 31 10 30 25 30 MIN. QFE PRESSURE IN HPA 845.8 846.0 842.2 848.3 850.0 841.6 843.5 847.4 852.9 853.8 853.2 849.5 841.6 DAY 20 5 17 4 9 14 13 15 28 11 18 7 MEAN QNH PRESSURE IN HPA 1021.8 1023.4 1021.2 1020.8 1020.4 1018.8 1016.7 1019.3 1023.3 1026.1 1026.3 1024.8 1021.9 MAX. QNH PRESSURE IN HPA 1036.7 1030.8 1027.2 1026.4 1024.2 1022.8 1021.2 1023.0 1025.8 1030.2 1031.9 1031.6 1036.7 DAY 3 9 2 16 12 18 27 31 10 30 25 30 MIN. QNH PRESSURE IN HPA 1012.2 1012.4 1008.0 1015.1 1017.0 1007.3 1009.5 1014.0 1020.4 1021.4 1020.7 1016.4 1007.3 DAY 20 5 17 4 9 14 13 15 28 11 18 7 MEAN QFF PRESSURE IN HPA 1023.0 1023.1 1016.6 1015.5 1011.4 1006.8 1003.5 1007.0 1014.1 1019.1 1024.0 1024.7 1015.7 MAX. QFF PRESSURE IN HPA 1039.3 1034.0 1025.0 1023.2 1015.8 1010.4 1009.0 1013.6 1016.8 1026.8 1036.4 1036.8 1039.3 DAY 3 9 2 7 11 1 6 31 10 21 25 30 MIN. QFF PRESSURE IN HPA 1008.8 1008.3 1004.8 1010.0 1006.4 994.6 994.2 998.6 1010.5 1012.1 1015.2 1013.6 994.2 DAY 20 1 17 1 9 7 13 15 29 11 18 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 853.9 855.9 854.3 854.1 853.7 852.5 850.6 852.6 856.1 858.5 858.7 857.0 854.8 MAX. QFE PRESSURE IN HPA 861.6 862.2 859.2 860.7 856.9 856.0 854.4 855.6 858.1 861.7 862.7 862.8 862.8 DAY 4 9 22 17 11 18 6 31 10 30 25 30 MIN. QFE PRESSURE IN HPA 844.2 846.3 842.5 848.3 850.7 843.6 843.9 847.7 853.5 854.3 852.8 850.2 842.5 DAY 12 5 17 4 9 7 13 8 28 11 18 7 MEAN QNH PRESSURE IN HPA 1021.6 1023.8 1021.9 1021.8 1021.3 1020.0 1017.7 1020.1 1024.1 1026.8 1027.1 1025.1 1022.6 MAX. QNH PRESSURE IN HPA 1030.4 1031.1 1027.7 1029.4 1025.0 1024.0 1022.1 1023.5 1026.4 1030.6 1031.7 1031.8 1031.8 DAY 4 9 22 17 11 18 6 31 10 30 25 30 MIN. QNH PRESSURE IN HPA 1010.3 1012.7 1008.4 1015.1 1017.8 1009.6 1010.0 1014.4 1021.1 1022.0 1020.3 1017.3 1008.4 DAY 12 5 17 4 9 7 13 8 28 11 18 7 MEAN QFF PRESSURE IN HPA 1023.9 1025.2 1019.0 1017.3 1012.8 1008.3 1004.9 1008.8 1016.3 1022.1 1026.4 1026.8 1017.7 MAX. QFF PRESSURE IN HPA 1034.3 1035.8 1027.0 1024.6 1017.5 1011.4 1011.3 1015.2 1019.0 1028.8 1037.4 1038.6 1038.6 DAY 14 9 1 7 11 18 6 31 24 15 25 30 MIN. QFF PRESSURE IN HPA 1010.9 1010.2 1006.5 1009.8 1008.3 996.7 996.2 1000.0 1013.4 1014.3 1016.5 1015.5 996.2 DAY 20 1 17 1 9 7 13 15 29 11 18 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 854.7 856.8 855.0 854.7 853.9 852.5 850.5 852.6 856.5 859.0 859.4 858.3 855.3 MAX. QFE PRESSURE IN HPA 862.5 863.0 860.7 861.0 857.3 855.5 854.1 855.7 858.3 862.1 863.2 863.6 863.6 DAY 4 13 22 17 11 17 5 31 9 19 24 30 MIN. QFE PRESSURE IN HPA 841.1 846.0 845.4 848.6 850.3 843.6 843.8 846.9 853.9 854.7 852.6 850.1 841.1 DAY 21 5 17 4 9 7 13 8 28 10 18 7 MEAN QNH PRESSURE IN HPA 1022.5 1024.9 1022.8 1022.4 1021.5 1019.9 1017.7 1020.1 1024.5 1027.5 1027.9 1026.6 1023.2 MAX. QNH PRESSURE IN HPA 1031.5 1032.1 1029.4 1029.8 1025.5 1023.4 1021.8 1023.6 1026.6 1031.0 1032.3 1032.8 1032.8 DAY 4 13 22 17 11 17 5 31 9 19 24 30 MIN. QNH PRESSURE IN HPA 1006.7 1012.4 1011.7 1015.4 1017.4 1009.6 1009.9 1013.4 1021.5 1022.5 1020.0 1017.1 1006.7 DAY 21 5 17 4 9 7 13 8 28 10 18 7 MEAN QFF PRESSURE IN HPA 1024.2 1025.2 1018.5 1016.9 1011.8 1007.6 1004.1 1007.7 1014.5 1020.1 1025.7 1027.0 1016.9 MAX. QFF PRESSURE IN HPA 1034.3 1035.7 1026.6 1025.0 1018.0 1011.5 1009.9 1013.3 1017.3 1027.9 1036.6 1037.7 1037.7 DAY 14 8 1 6 12 2 6 31 9 21 25 30 MIN. QFF PRESSURE IN HPA 1005.1 1011.0 1009.3 1010.1 1006.4 995.5 993.9 999.7 1008.8 1011.8 1014.6 1015.4 993.9 DAY 21 1 17 1 9 7 13 8 29 11 18 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 854.0 855.9 854.0 853.7 852.9 851.6 849.4 851.3 855.1 857.3 857.6 856.3 854.1 MAX. QFE PRESSURE IN HPA 861.7 863.0 860.2 859.9 856.7 854.9 853.5 854.6 857.5 860.7 862.3 861.9 863.0 DAY 4 13 22 17 11 17 30 31 22 19 25 30 MIN. QFE PRESSURE IN HPA 842.0 843.0 846.5 848.3 849.0 842.3 843.0 845.5 852.2 852.8 852.0 847.2 842.0 DAY 12 5 17 4 9 7 13 8 28 10 18 7 MEAN QNH PRESSURE IN HPA 1021.7 1023.9 1021.7 1021.3 1020.4 1018.9 1016.3 1018.5 1023.0 1025.5 1025.8 1024.3 1021.8 MAX. QNH PRESSURE IN HPA 1030.6 1032.1 1028.8 1028.5 1024.8 1022.7 1021.1 1022.4 1025.7 1029.4 1031.3 1030.8 1032.1 DAY 4 13 22 17 11 17 30 31 22 19 25 30 MIN. QNH PRESSURE IN HPA 1007.8 1008.9 1013.0 1015.1 1015.9 1008.1 1008.9 1011.8 1019.6 1020.3 1019.3 1013.8 1007.8 DAY 12 5 17 4 9 7 13 8 28 10 18 7 MEAN QFF PRESSURE IN HPA 1022.4 1023.2 1016.7 1015.5 1010.6 1006.5 1002.2 1005.5 1012.8 1017.8 1022.8 1023.7 1015.0 MAX. QFF PRESSURE IN HPA 1031.8 1033.9 1025.1 1022.6 1016.0 1009.9 1008.0 1011.9 1015.4 1024.7 1034.6 1034.6 1034.6 DAY 4 8 1 6 12 18 27 31 22 31 25 30 MIN. QFF PRESSURE IN HPA 1007.0 1007.7 1006.6 1009.2 1004.4 994.9 992.3 998.0 1009.5 1010.2 1014.5 1009.9 992.3 DAY 12 5 7 1 30 7 13 8 28 10 5 7 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 853.4 854.9 852.7 853.1 851.8 850.7 848.5 850.4 854.2 856.6 857.3 856.0 853.3 MAX. QFE PRESSURE IN HPA 860.1 861.1 858.4 859.1 855.9 854.0 852.8 853.6 856.8 860.1 862.3 861.3 862.3 DAY 4 13 22 3 11 17 26 31 9 19 24 30 MIN. QFE PRESSURE IN HPA 844.7 844.9 845.2 848.8 848.8 843.9 841.7 844.2 851.2 852.5 851.1 848.8 841.7 DAY 12 5 16 1 8 7 13 8 28 10 18 7 MEAN QNH PRESSURE IN HPA 1020.9 1022.7 1020.1 1020.6 1019.2 1017.8 1015.3 1017.4 1021.9 1024.7 1025.4 1023.9 1020.8 MAX. QNH PRESSURE IN HPA 1028.7 1029.9 1026.7 1027.6 1023.9 1021.7 1020.3 1021.2 1024.9 1028.7 1031.3 1030.1 1031.3 DAY 4 13 22 3 11 17 26 31 9 19 24 30 MIN. QNH PRESSURE IN HPA 1010.9 1011.1 1011.5 1015.6 1015.6 1010.0 1007.4 1010.3 1018.4 1019.9 1018.3 1015.6 1007.4 DAY 12 5 16 1 8 7 13 8 28 10 18 7 MEAN QFF PRESSURE IN HPA 1022.0 1022.4 1015.4 1015.2 1009.9 1005.7 1001.6 1004.9 1012.3 1017.6 1023.0 1023.8 1014.5 MAX. QFF PRESSURE IN HPA 1030.6 1033.2 1024.2 1024.5 1015.5 1009.8 1007.4 1012.1 1015.7 1025.5 1034.5 1035.2 1035.2 DAY 4 8 1 3 11 2 27 31 10 31 24 30 MIN. QFF PRESSURE IN HPA 1011.3 1009.1 1005.4 1009.7 1002.3 997.3 991.2 996.5 1008.5 1010.3 1014.7 1012.5 991.2 DAY 31 27 7 9 30 6 13 8 28 10 18 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 853.9 855.7 853.2 853.5 852.2 851.0 848.7 851.0 854.8 857.4 857.9 857.1 853.9 MAX. QFE PRESSURE IN HPA 860.3 861.5 858.8 860.8 856.3 854.7 853.0 853.9 856.8 861.2 863.0 861.8 863.0 DAY 4 8 22 16 11 17 30 31 22 31 24 14 MIN. QFE PRESSURE IN HPA 846.5 848.7 845.3 849.1 849.4 844.6 842.2 844.8 852.4 853.3 850.6 850.7 842.2 DAY 19 5 16 4 30 7 13 8 28 10 18 5 MEAN QNH PRESSURE IN HPA 1021.6 1023.7 1020.7 1021.0 1019.5 1018.2 1015.6 1018.2 1022.5 1025.6 1026.1 1025.2 1021.5 MAX. QNH PRESSURE IN HPA 1028.9 1030.3 1027.2 1029.5 1024.3 1022.5 1020.5 1021.5 1024.9 1030.0 1032.1 1030.7 1032.1 DAY 4 8 22 16 11 17 30 31 22 31 24 14 MIN. QNH PRESSURE IN HPA 1013.0 1015.5 1011.6 1016.0 1016.3 1010.8 1008.0 1011.0 1019.8 1020.8 1017.7 1017.8 1008.0 DAY 19 5 16 4 30 7 13 8 28 10 18 5 MEAN QFF PRESSURE IN HPA 1023.7 1025.1 1017.6 1016.4 1010.8 1006.5 1002.6 1006.7 1014.5 1020.8 1025.3 1027.0 1016.4 MAX. QFF PRESSURE IN HPA 1032.6 1035.2 1026.3 1025.1 1016.3 1010.1 1009.6 1013.3 1017.6 1028.9 1036.2 1038.0 1038.0 DAY 4 8 1 16 11 2 6 31 24 31 25 30 MIN. QFF PRESSURE IN HPA 1012.0 1010.3 1007.5 1010.7 1003.1 998.5 993.2 998.5 1011.5 1013.2 1014.2 1016.5 993.2 DAY 31 27 7 28 30 6 13 8 14 10 18 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 854.4 856.4 853.9 854.3 853.5 852.3 850.2 852.5 856.2 858.4 858.3 857.7 854.8 MAX. QFE PRESSURE IN HPA 861.2 861.9 859.7 860.8 857.8 855.7 854.4 855.1 858.2 861.5 863.6 862.7 863.6 DAY 13 8 22 16 11 17 29 30 9 31 24 30 MIN. QFE PRESSURE IN HPA 847.1 849.3 844.8 849.3 850.6 846.7 844.0 847.1 853.3 853.5 850.5 852.6 844.0 DAY 31 27 16 4 20 7 12 8 28 10 18 7 MEAN QNH PRESSURE IN HPA 1022.1 1024.5 1021.6 1022.1 1021.0 1019.7 1017.2 1019.9 1024.2 1026.7 1026.6 1025.9 1022.6 MAX. QNH PRESSURE IN HPA 1030.0 1030.8 1028.2 1029.5 1026.1 1023.6 1022.1 1022.9 1026.5 1030.3 1032.8 1031.7 1032.8 DAY 13 8 22 16 11 17 29 30 9 31 24 30 MIN. QNH PRESSURE IN HPA 1013.7 1016.2 1011.0 1016.2 1017.7 1013.2 1010.1 1013.7 1020.8 1021.1 1017.6 1020.0 1010.1 DAY 31 27 16 4 20 7 12 8 28 10 18 7 MEAN QFF PRESSURE IN HPA 1023.5 1024.9 1017.3 1016.5 1011.4 1007.4 1003.8 1007.6 1014.3 1019.5 1024.3 1026.4 1016.4 MAX. QFF PRESSURE IN HPA 1035.0 1034.6 1025.6 1024.8 1017.9 1011.0 1009.5 1012.4 1017.3 1027.7 1036.5 1036.4 1036.5 DAY 13 8 1 6 11 18 6 31 24 20 24 30 MIN. QFF PRESSURE IN HPA 1010.3 1010.1 1005.8 1010.4 1006.0 998.1 994.4 1000.3 1007.9 1009.3 1012.8 1017.3 994.4 DAY 31 27 16 28 30 6 12 14 28 10 18 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 853.8 856.2 853.8 854.0 853.3 851.9 850.1 852.5 856.0 858.2 858.1 857.3 854.6 MAX. QFE PRESSURE IN HPA 861.4 862.0 859.1 860.5 857.4 855.5 854.3 855.5 858.1 861.5 863.4 862.5 863.4 DAY 13 8 22 16 11 17 29 11 9 20 24 30 MIN. QFE PRESSURE IN HPA 846.0 849.0 841.5 848.1 850.3 843.0 843.7 847.7 853.8 853.5 850.9 851.5 841.5 DAY 31 27 16 4 20 6 12 14 27 10 18 5 MEAN QNH PRESSURE IN HPA 1021.4 1024.3 1021.4 1021.7 1020.8 1019.3 1017.2 1019.9 1023.9 1026.5 1026.4 1025.5 1022.4 MAX. QNH PRESSURE IN HPA 1030.2 1030.9 1027.6 1029.2 1025.6 1023.4 1022.0 1023.4 1026.4 1030.3 1032.5 1031.5 1032.5 DAY 13 8 22 16 11 17 29 11 9 20 24 30 MIN. QNH PRESSURE IN HPA 1012.4 1015.9 1007.2 1014.8 1017.4 1008.9 1009.7 1014.4 1021.4 1021.1 1018.1 1018.8 1007.2 DAY 31 27 16 4 20 6 12 14 27 10 18 5 MEAN QFF PRESSURE IN HPA 1022.1 1023.6 1016.4 1015.8 1011.1 1007.1 1003.3 1007.2 1014.1 1019.0 1023.5 1025.1 1015.7 MAX. QFF PRESSURE IN HPA 1034.4 1034.1 1024.8 1023.2 1017.4 1011.3 1009.0 1012.1 1017.0 1027.3 1036.0 1036.2 1036.2 DAY 13 7 1 16 11 18 30 21 24 20 24 30 MIN. QFF PRESSURE IN HPA 1007.7 1009.6 1001.7 1010.0 1006.0 994.8 993.7 998.6 1010.9 1010.6 1014.8 1015.0 993.7 DAY 31 27 16 29 30 6 12 14 28 10 18 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.8 6.2 13.5 19.7 21.6 27.4 28.5 25.9 23.1 16.9 7.0 6.8 16.9 MINIMUN AIR TEMPERATURE (C) 0.6 -1.4 6.0 10.5 11.8 17.2 19.3 16.6 12.8 7.2 -0.8 1.4 8.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 10 4 0 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 4 11 1 0 0 0 0 0 0 0 12 5 33 DAYS WITH FREEZING MIN.<= 0 17 19 3 0 0 0 0 0 0 2 18 13 72 TEMPERATURE RECORDS LOWEST(C) -7.0 -6.0 -4.0 4.0 7.0 13.0 14.0 10.0 6.0 0.0 -9.0 -5.0 -9.0 DAY 1 8 2 7 14 1 8 29 29 25 24 13 MAXIMUM AIR TEMPERATURE (C) 12.6 15.1 21.5 28.4 29.9 36.4 37.0 35.8 33.3 27.3 16.7 14.2 25.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 14 21 30 30 31 25 9 0 0 160 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 21.0 26.0 35.0 34.0 40.0 43.0 40.0 39.0 32.0 25.0 22.0 43.0 DAY 17 23 15 22 27 22 4 30 2 4 6 9 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 16.5 15.5 17.9 18.1 19.2 17.7 19.2 20.5 20.1 17.5 12.8 17.3 MEAN DAILY TEMP. (MDT) (C) 6.6 6.9 13.8 19.4 20.8 26.8 28.1 26.2 23.0 17.3 7.9 7.8 17.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 16.0 18.0 173.5 221.5 161.5 78.5 0.5 0.0 0.0 669.5 HEATING DEG. DAYS(BASE 18 0C) 353.0 311.5 131.0 17.5 1.5 0.0 0.0 0.0 3.5 43.5 301.5 316.0 1479.0 DEWPOINT (MEAN C) -0.7 -4.9 1.5 4.4 3.7 8.9 9.4 9.7 5.9 1.0 -5.6 -0.5 2.7 MIXING RATIO (G/KG) 4.38 3.24 5.16 6.33 6.01 8.61 9.01 9.25 7.06 5.06 3.15 4.49 5.98 VAPOUR PRESSURE (HPA) 5.98 4.43 7.02 8.60 8.18 11.60 12.10 12.45 9.56 6.90 4.33 6.14 8.11 SATURATION DEF. (HPA) 3.82 5.93 9.59 16.13 19.13 27.03 29.25 23.33 21.30 14.33 6.97 4.48 15.11 RELATIVE HUMIDITY (MEAN %) 67 50 48 40 33 33 32 38 35 36 44 63 43 RELATIVE HUMIDITY (MAX. %) 83 74 70 61 49 47 44 50 51 50 64 82 60 RELATIVE HUMIDITY (MIN. %) 42 25 27 23 21 22 22 27 22 23 26 41 27 RELATIVE HUMIDITY (MEAN% 03UTC) 77 66 61 52 40 40 38 45 44 44 58 75 53 RELATIVE HUMIDITY (MEAN% 09UTC) 52 28 31 26 23 23 23 29 23 25 27 43 29 RELATIVE HUMIDITY (MEAN% 15UTC) 68 44 43 36 28 28 27 34 34 38 46 67 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.2 1.0 15.9 11.2 0.3 3.0 2.0 0.0 1.1 1.0 0.4 36.6 102.7 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 1 2 DAYS WITH PRECIPITATION >= 5 3 0 1 1 0 0 0 0 0 0 0 2 7 DAYS WITH PRECIPITATION >= 1 9 1 3 4 0 2 2 0 1 1 0 6 29 DAYS WITH PRECIPITATION 11 2 10 6 2 3 2 0 2 1 2 8 49 GREATEST DAILY PRECIPITATION 7.0 1.0 11.3 5.0 0.3 2.0 1.0 0.0 1.0 1.0 0.3 20.0 20.0 DAY 24 16 10 6 9 15 5 ** 25 16 9 11 DAY WITH THUNDER STORM 0 0 0 4 0 2 2 0 1 0 0 2 11 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 3 1 1 8 3 4 6 1 0 0 2 0 29 WIND DIRECTION (PREVAILING) 45 90 270 270 45 135 90 90 90 90 90 90 90 PREVAILING WIND SPEED(KNOTS) 6.5 4.2 9.5 8.9 7.8 8.6 11.5 8.2 6.8 6.3 5.5 6.5 7.5 PREVAILING WIND PERCENT 18.5 18.3 19.4 22.5 23.8 24.6 38.3 38.3 30.8 18.3 23.8 19.0 22.5 CALMS PERCENT OF WIND 35.1 32.6 33.5 34.2 12.9 17.5 11.3 6.9 18.8 30.4 32.5 44.0 25.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 240 240 248 2912 VECTOR WIND DIRECTION (MEAN) 75 360 317 291 66 92 94 99 81 79 45 74 83 VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.4 1.0 1.5 3.0 3.8 7.1 6.1 3.2 1.2 0.7 1.0 2.1 WIND STEADINESES (MEAN %) 31.0 10.5 20.8 30.6 41.1 54.3 79.8 83.6 59.3 25.5 17.1 28.6 38.2 WIND SPEED (MEAN KNOTS) 4.2 3.8 4.8 4.9 7.3 7.0 8.9 7.3 5.4 4.7 4.1 3.5 5.5 FASTEST WIND DIRECTION 270 290 100 310 360 90 130 90 130 50 270 270 100 FASTEST WIND SPEED (KNOTS) 27 23 37 23 27 18 33 18 20 23 20 20 37 DAY 31 1 2 18 13 3 15 2 10 18 7 4 DAYS WITH SKY CLEAR (0-2)/8 10 18 10 11 18 20 25 26 28 26 17 11 220 DAYS WITH P.CLOUDY (3-6)/8 10 9 12 12 12 9 6 5 2 3 9 11 100 DAYS WITH CLOUDY (7-8)/8 11 1 9 7 1 1 0 0 0 1 4 9 44 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.5 856.0 854.6 854.0 855.0 850.2 847.8 850.8 852.7 857.1 859.5 856.7 854.2 MAX. QFE PRESSURE IN HPA 863.2 863.0 860.0 860.4 862.5 855.2 853.3 859.5 859.8 861.7 864.9 864.0 864.9 DAY-HOUR 13- 6 19- 6 28- 6 2- 6 13-18 4- 3 16- 3 20-12 4- 0 7- 6 4- 6 5-18 MIN. QFE PRESSURE IN HPA 847.6 847.6 847.5 848.5 849.0 844.0 837.4 845.9 847.9 851.3 851.5 842.0 837.4 DAY-HOUR 30-15 1- 0 9-15 20-12 2- 0 1- 3 9-15 2-12 4-12 10-12 7- 9 1- 6 MEAN QNH PRESSURE IN HPA 1024.6 1023.9 1022.3 1021.6 1022.8 1017.2 1014.5 1018.0 1020.1 1025.2 1028.0 1024.8 1021.9 MAX. QNH PRESSURE IN HPA 1032.3 1032.1 1028.6 1029.1 1031.5 1023.0 1020.8 1028.0 1028.4 1030.6 1034.3 1033.2 1034.3 DAY-HOUR 13- 6 19- 6 28- 6 2- 6 13-18 4- 3 16- 3 20-12 4- 0 7- 6 4- 6 5-18 MIN. QNH PRESSURE IN HPA 1014.3 1014.3 1014.1 1015.3 1015.9 1010.1 1002.5 1012.3 1014.6 1018.5 1018.8 1007.8 1002.5 DAY-HOUR 30-15 1- 0 9-15 20-12 2- 0 1- 3 9-15 2-12 4-12 10-12 7- 9 1- 6 MEAN QFF PRESSURE IN HPA 1024.3 1023.5 1017.0 1012.5 1012.7 1003.5 1000.0 1005.0 1008.9 1017.9 1027.2 1023.8 1014.7 MAX. QFF PRESSURE IN HPA 1035.9 1033.3 1027.4 1023.7 1024.3 1011.2 1010.7 1017.3 1018.1 1027.7 1036.6 1032.2 1036.6 DAY-HOUR 2-15 13- 3 2- 3 2- 3 13-15 2- 0 16- 3 31-15 28- 3 22- 3 19- 3 6- 3 MIN. QFF PRESSURE IN HPA 1009.2 1011.5 1008.5 1004.0 1004.3 995.6 985.4 996.7 1000.7 1008.5 1010.5 1003.1 985.4 DAY-HOUR 30-21 6- 0 10- 0 22-12 2- 0 21-12 10- 9 2-12 4-12 10- 9 7- 9 1- 6 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 856.7 855.7 854.4 854.1 855.1 850.6 848.0 851.0 853.0 857.0 859.5 856.7 854.3 MAX. QFE PRESSURE IN HPA 862.3 861.5 858.5 859.0 861.0 854.8 852.7 853.6 859.8 859.7 863.5 862.8 863.5 DAY 3 19 29 2 14 2 16 23 4 23 4 6 MIN. QFE PRESSURE IN HPA 849.7 847.6 848.3 849.8 849.0 846.6 839.0 848.3 849.8 853.2 854.2 851.5 839.0 DAY 31 1 10 6 2 21 10 7 5 10 7 10 MEAN QNH PRESSURE IN HPA 1024.8 1023.7 1022.1 1021.8 1023.0 1017.7 1014.7 1018.2 1020.5 1025.2 1028.0 1024.8 1022.0 MAX. QNH PRESSURE IN HPA 1031.3 1030.3 1026.9 1027.4 1029.8 1022.6 1020.2 1021.2 1028.4 1028.2 1032.6 1031.8 1032.6 DAY 3 19 29 2 14 2 16 23 4 23 4 6 MIN. QNH PRESSURE IN HPA 1016.7 1014.3 1015.1 1016.8 1015.9 1013.1 1004.3 1015.1 1016.8 1020.7 1021.9 1018.8 1004.3 DAY 31 1 10 6 2 21 10 7 5 10 7 10 MEAN QFF PRESSURE IN HPA 1024.0 1022.8 1016.6 1013.0 1013.1 1004.2 1000.5 1005.2 1009.4 1017.6 1026.9 1023.1 1014.7 MAX. QFF PRESSURE IN HPA 1032.7 1030.0 1024.9 1022.1 1023.7 1011.2 1009.2 1009.9 1016.8 1024.0 1033.8 1029.2 1033.8 DAY 3 14 2 2 14 2 16 27 30 22 24 27 MIN. QFF PRESSURE IN HPA 1010.2 1011.5 1008.5 1006.4 1004.3 999.3 987.0 1000.0 1003.7 1011.4 1013.8 1010.9 987.0 DAY 31 6 10 30 2 21 10 2 3 10 7 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 856.9 856.2 854.9 854.8 855.9 851.0 848.7 851.7 853.2 857.7 860.1 857.1 854.9 MAX. QFE PRESSURE IN HPA 861.7 861.9 859.1 859.8 861.3 855.2 853.3 855.5 857.0 861.2 864.6 863.0 864.6 DAY 3 19 28 2 14 4 16 25 21 7 4 6 MIN. QFE PRESSURE IN HPA 849.6 848.0 849.5 849.7 849.7 844.0 839.9 848.8 850.0 853.6 853.6 853.1 839.9 DAY 31 6 10 6 2 1 10 7 5 10 7 31 MEAN QNH PRESSURE IN HPA 1025.0 1024.3 1022.7 1022.5 1023.9 1018.2 1015.5 1019.0 1020.8 1026.0 1028.7 1025.3 1022.6 MAX. QNH PRESSURE IN HPA 1030.6 1030.8 1027.6 1028.4 1030.1 1023.0 1020.8 1023.4 1025.1 1030.0 1033.9 1032.1 1033.9 DAY 3 19 28 2 14 4 16 25 21 7 4 6 MIN. QNH PRESSURE IN HPA 1016.6 1014.7 1016.4 1016.7 1016.7 1010.1 1005.3 1015.6 1017.0 1021.2 1021.2 1020.6 1005.3 DAY 31 6 10 6 2 1 10 7 5 10 7 31 MEAN QFF PRESSURE IN HPA 1025.9 1025.5 1018.8 1014.6 1014.3 1005.2 1001.6 1006.9 1011.0 1020.7 1030.0 1025.7 1016.7 MAX. QFF PRESSURE IN HPA 1035.8 1033.3 1027.4 1023.7 1023.1 1011.0 1010.7 1011.7 1018.1 1027.7 1036.6 1032.2 1036.6 DAY 2 13 2 2 14 2 16 26 28 22 19 6 MIN. QFF PRESSURE IN HPA 1010.9 1013.9 1011.2 1007.7 1006.7 998.1 988.6 1001.2 1005.1 1014.2 1015.9 1016.6 988.6 DAY 31 6 10 30 1 1 10 2 5 10 7 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.0 857.1 855.6 855.0 855.9 851.1 848.4 851.7 853.7 858.1 860.6 857.5 855.2 MAX. QFE PRESSURE IN HPA 863.2 863.0 860.0 860.4 861.4 855.1 852.6 856.0 858.1 861.7 864.9 863.7 864.9 DAY 13 19 28 2 14 3 16 25 21 7 4 5 MIN. QFE PRESSURE IN HPA 852.2 849.6 851.2 850.3 850.9 846.5 839.9 848.5 850.6 854.1 853.7 842.0 839.9 DAY 31 3 10 6 2 21 10 2 5 10 7 1 MEAN QNH PRESSURE IN HPA 1026.3 1025.2 1023.5 1022.8 1023.9 1018.3 1015.2 1019.0 1021.3 1026.4 1029.3 1025.7 1023.1 MAX. QNH PRESSURE IN HPA 1032.3 1032.1 1028.6 1029.1 1030.2 1022.9 1020.0 1024.0 1026.4 1030.6 1034.3 1032.9 1034.3 DAY 13 19 28 2 14 3 16 25 21 7 4 5 MIN. QNH PRESSURE IN HPA 1019.6 1016.6 1018.4 1017.4 1018.1 1013.0 1005.3 1015.3 1017.7 1021.8 1021.3 1007.8 1005.3 DAY 31 3 10 6 2 21 10 2 5 10 7 1 MEAN QFF PRESSURE IN HPA 1026.3 1024.8 1017.8 1013.3 1013.3 1004.3 1000.6 1005.8 1009.6 1018.5 1028.4 1024.8 1015.6 MAX. QFF PRESSURE IN HPA 1034.6 1031.6 1025.5 1022.0 1021.4 1010.1 1009.5 1011.9 1017.3 1025.1 1034.5 1032.0 1034.6 DAY 2 19 2 2 14 3 16 25 29 22 24 27 MIN. QFF PRESSURE IN HPA 1014.8 1015.3 1011.2 1006.2 1006.4 998.9 987.3 999.9 1003.7 1011.6 1013.4 1003.1 987.3 DAY 31 6 23 29 1 21 10 2 18 10 7 1 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.9 855.5 854.4 853.7 854.9 849.9 847.4 850.4 852.1 856.4 858.8 856.2 853.8 MAX. QFE PRESSURE IN HPA 861.3 861.0 858.9 859.5 861.1 854.1 852.1 854.3 855.8 860.5 863.0 862.2 863.0 DAY 2 13 28 2 13 3 16 25 21 7 3 5 MIN. QFE PRESSURE IN HPA 850.0 848.1 850.9 849.5 850.4 845.4 838.9 846.8 849.0 851.9 851.5 852.0 838.9 DAY 30 3 9 6 2 21 10 2 3 10 7 11 MEAN QNH PRESSURE IN HPA 1023.8 1023.4 1022.1 1021.3 1022.7 1016.9 1014.0 1017.5 1019.5 1024.4 1027.3 1024.2 1021.4 MAX. QNH PRESSURE IN HPA 1030.1 1029.8 1027.3 1028.0 1029.9 1021.8 1019.5 1022.0 1023.7 1029.2 1032.1 1031.1 1032.1 DAY 2 13 28 2 13 3 16 25 21 7 3 5 MIN. QNH PRESSURE IN HPA 1017.0 1014.8 1018.1 1016.4 1017.5 1011.7 1004.2 1013.3 1015.9 1019.2 1018.8 1019.3 1004.2 DAY 30 3 9 6 2 21 10 2 3 10 7 11 MEAN QFF PRESSURE IN HPA 1022.7 1021.9 1016.1 1011.5 1012.0 1002.5 998.8 1003.6 1007.4 1015.9 1025.3 1022.0 1013.3 MAX. QFF PRESSURE IN HPA 1031.3 1029.1 1022.2 1021.4 1020.6 1009.1 1008.4 1008.8 1014.8 1022.1 1031.1 1027.6 1031.3 DAY 2 13 1 2 13 1 16 25 30 22 19 26 MIN. QFF PRESSURE IN HPA 1012.8 1013.7 1011.6 1004.4 1006.7 996.6 985.4 997.0 1001.4 1008.5 1010.5 1013.7 985.4 DAY 30 3 30 29 2 21 10 2 4 10 7 1 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.4 854.8 853.4 852.7 853.6 848.6 846.4 849.6 851.2 855.7 858.2 855.7 852.9 MAX. QFE PRESSURE IN HPA 860.7 859.8 857.8 859.8 861.0 852.8 851.1 859.5 854.9 859.7 862.6 862.0 862.6 DAY 2 13 28 5 13 1 16 20 21 7 4 5 MIN. QFE PRESSURE IN HPA 848.0 848.0 849.2 848.5 849.1 844.2 837.6 845.9 847.9 851.3 852.2 851.6 837.6 DAY 30 3 9 20 2 21 9 2 4 10 7 11 MEAN QNH PRESSURE IN HPA 1023.3 1022.5 1020.9 1020.2 1021.2 1015.5 1012.8 1016.5 1018.4 1023.6 1026.5 1023.7 1020.4 MAX. QNH PRESSURE IN HPA 1029.4 1028.4 1026.1 1028.4 1029.8 1020.3 1018.3 1028.0 1022.7 1028.2 1031.6 1030.9 1031.6 DAY 2 13 28 5 13 1 16 20 21 7 4 5 MIN. QNH PRESSURE IN HPA 1014.7 1014.7 1016.1 1015.3 1016.0 1010.3 1002.7 1012.3 1014.6 1018.5 1019.6 1018.9 1002.7 DAY 30 3 9 20 2 21 9 2 4 10 7 11 MEAN QFF PRESSURE IN HPA 1022.3 1021.4 1015.3 1011.2 1011.2 1001.7 998.2 1003.1 1007.0 1015.8 1025.0 1022.0 1012.9 MAX. QFF PRESSURE IN HPA 1031.2 1029.2 1021.6 1019.7 1021.9 1008.3 1007.3 1014.1 1014.6 1023.0 1031.4 1027.5 1031.4 DAY 2 13 1 2 13 1 16 20 29 22 23 26 MIN. QFF PRESSURE IN HPA 1010.8 1013.9 1008.6 1004.0 1004.6 995.6 986.3 996.7 1000.7 1009.3 1013.1 1013.9 986.3 DAY 30 3 30 22 2 21 9 2 4 10 7 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.3 855.7 853.9 853.1 854.0 849.0 846.9 850.1 851.8 856.5 859.2 856.7 853.6 MAX. QFE PRESSURE IN HPA 861.7 861.0 858.1 859.6 861.6 853.6 851.7 859.0 855.4 860.3 863.8 863.1 863.8 DAY 2 13 28 18 13 2 16 31 21 22 3 5 MIN. QFE PRESSURE IN HPA 847.6 848.6 847.5 848.5 849.3 845.5 837.4 846.5 848.3 852.6 854.6 853.1 837.4 DAY 30 5 9 20 1 21 9 7 4 10 30 11 MEAN QNH PRESSURE IN HPA 1024.3 1023.6 1021.5 1020.6 1021.6 1015.9 1013.4 1017.1 1019.1 1024.6 1027.6 1024.8 1021.2 MAX. QNH PRESSURE IN HPA 1030.6 1029.8 1026.4 1028.1 1030.4 1021.2 1019.0 1027.4 1023.3 1028.9 1033.0 1032.2 1033.0 DAY 2 13 28 18 13 2 16 31 21 22 3 5 MIN. QNH PRESSURE IN HPA 1014.3 1015.4 1014.1 1015.3 1016.2 1011.8 1002.5 1013.0 1015.1 1020.0 1022.4 1020.6 1002.5 DAY 30 5 9 20 1 21 9 7 4 10 30 11 MEAN QFF PRESSURE IN HPA 1025.1 1024.7 1017.5 1012.5 1011.9 1002.7 999.4 1004.8 1009.1 1019.2 1028.7 1025.1 1015.1 MAX. QFF PRESSURE IN HPA 1035.9 1032.8 1025.4 1021.4 1024.3 1009.4 1008.8 1017.3 1016.4 1027.0 1035.3 1031.2 1035.9 DAY 2 13 1 2 13 2 16 31 29 22 19 26 MIN. QFF PRESSURE IN HPA 1011.0 1016.7 1010.0 1004.9 1006.1 998.4 986.6 999.0 1002.1 1013.1 1018.8 1016.0 986.6 DAY 30 24 30 22 1 30 9 2 4 10 7 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 856.7 856.4 855.0 854.2 855.4 850.6 848.4 851.2 853.2 857.6 859.8 857.2 854.6 MAX. QFE PRESSURE IN HPA 862.7 861.8 859.4 859.8 862.5 855.0 853.2 854.2 857.0 860.9 864.2 864.0 864.2 DAY 2 13 28 2 13 3 15 25 21 22 3 5 MIN. QFE PRESSURE IN HPA 848.2 848.7 849.8 850.1 850.8 847.8 838.7 848.7 849.8 853.7 855.0 853.1 838.7 DAY 30 5 9 18 1 30 9 6 4 9 30 1 MEAN QNH PRESSURE IN HPA 1024.8 1024.4 1022.8 1021.9 1023.3 1017.7 1015.1 1018.4 1020.7 1025.8 1028.3 1025.3 1022.4 MAX. QNH PRESSURE IN HPA 1031.7 1030.7 1027.9 1028.4 1031.5 1022.8 1020.7 1021.9 1025.1 1029.6 1033.4 1033.2 1033.4 DAY 2 13 28 2 13 3 15 25 21 22 3 5 MIN. QNH PRESSURE IN HPA 1014.9 1015.5 1016.8 1017.1 1018.0 1014.5 1004.0 1015.5 1016.8 1021.3 1022.8 1020.6 1004.0 DAY 30 5 9 18 1 30 9 6 4 9 30 1 MEAN QFF PRESSURE IN HPA 1024.7 1024.0 1017.2 1012.4 1012.9 1003.8 1000.6 1005.4 1009.2 1018.0 1027.3 1024.6 1015.0 MAX. QFF PRESSURE IN HPA 1034.7 1030.8 1024.0 1021.2 1024.2 1009.9 1009.7 1010.6 1016.3 1026.2 1035.0 1031.5 1035.0 DAY 2 13 2 2 13 2 15 25 29 22 23 26 MIN. QFF PRESSURE IN HPA 1009.7 1014.9 1010.1 1004.6 1006.2 999.3 987.0 1000.7 1003.4 1011.2 1016.7 1014.9 987.0 DAY 30 5 30 18 1 30 9 2 3 9 6 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 856.6 856.4 855.0 854.2 855.5 850.6 848.3 851.2 853.1 857.5 859.7 857.0 854.6 MAX. QFE PRESSURE IN HPA 862.5 861.3 859.0 859.4 862.2 855.0 852.6 854.6 856.8 861.1 864.4 863.5 864.4 DAY 2 13 28 2 13 1 15 25 21 22 4 5 MIN. QFE PRESSURE IN HPA 847.7 848.1 849.2 850.2 849.9 847.2 839.0 848.7 849.8 853.6 854.6 851.8 839.0 DAY 31 5 9 20 1 20 9 5 4 9 30 9 MEAN QNH PRESSURE IN HPA 1024.7 1024.4 1022.8 1021.9 1023.4 1017.7 1015.1 1018.4 1020.6 1025.7 1028.3 1025.1 1022.3 MAX. QNH PRESSURE IN HPA 1031.5 1030.1 1027.4 1027.9 1031.1 1022.8 1020.0 1022.4 1024.9 1029.9 1033.7 1032.6 1033.7 DAY 2 13 28 2 13 1 15 25 21 22 4 5 MIN. QNH PRESSURE IN HPA 1014.4 1014.8 1016.1 1017.3 1016.9 1013.8 1004.3 1015.5 1016.8 1021.2 1022.4 1019.1 1004.3 DAY 31 5 9 20 1 20 9 5 4 9 30 9 MEAN QFF PRESSURE IN HPA 1023.6 1023.0 1016.8 1012.0 1012.9 1003.4 1000.2 1005.0 1008.8 1017.5 1026.3 1023.2 1014.4 MAX. QFF PRESSURE IN HPA 1032.6 1029.2 1023.8 1022.2 1024.2 1010.4 1008.9 1010.5 1016.2 1024.9 1033.6 1030.1 1033.6 DAY 2 7 1 1 13 1 15 25 29 22 23 26 MIN. QFF PRESSURE IN HPA 1009.2 1012.5 1009.0 1004.8 1006.7 998.7 986.8 1000.1 1002.4 1010.9 1014.3 1011.2 986.8 DAY 30 5 9 20 1 30 9 1 3 9 6 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.3 4.8 12.0 19.2 21.6 26.9 27.7 29.4 25.2 18.7 8.9 3.2 16.8 MINIMUN AIR TEMPERATURE (C) -0.6 -0.4 5.4 11.0 14.1 17.4 18.7 20.5 15.2 8.9 1.5 -3.3 9.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 3 9 19 1 0 0 0 33 DAYS WITH MINIMUM TEMP. <=-4 8 6 0 0 0 0 0 0 0 0 3 13 30 DAYS WITH FREEZING MIN.<= 0 20 14 2 0 0 0 0 0 0 1 11 27 75 TEMPERATURE RECORDS LOWEST(C) -9.0 -7.0 -3.0 3.0 6.0 14.0 14.0 14.0 6.0 -1.0 -5.0 -15.0 -15.0 DAY 4 12 10 3 4 5 5 31 26 28 5 16 MAXIMUM AIR TEMPERATURE (C) 11.4 12.1 20.1 27.6 29.6 36.0 37.0 40.0 36.7 29.9 18.0 12.0 25.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 15 18 30 31 31 30 19 0 0 174 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 20.0 20.0 27.0 33.0 36.0 41.0 43.0 43.0 40.0 36.0 25.0 17.0 43.0 DAY 31 1 17 25 30 28 27 11 2 1 8 20 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 12.5 14.7 16.6 15.5 18.6 18.3 19.5 21.5 21.0 16.5 15.3 16.9 MEAN DAILY TEMP. (MDT) (C) 5.4 5.9 12.7 19.3 21.9 26.7 27.9 30.2 25.9 19.4 9.7 4.4 17.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 18.0 66.5 170.0 213.0 286.5 149.0 13.0 0.0 0.0 916.0 HEATING DEG. DAYS(BASE 18 0C) 392.0 339.5 168.0 31.5 9.5 0.0 0.0 0.0 0.0 15.0 248.5 423.0 1627.0 DEWPOINT (MEAN C) -2.2 -4.1 0.0 4.4 5.4 5.1 6.3 10.6 4.8 0.6 -3.4 -5.3 1.9 MIXING RATIO (G/KG) 3.97 3.50 4.61 6.31 6.80 6.61 7.24 9.84 6.62 4.85 3.60 3.13 5.59 VAPOUR PRESSURE (HPA) 5.42 4.76 6.28 8.58 9.20 8.95 9.75 13.20 8.94 6.62 4.92 4.30 7.58 SATURATION DEF. (HPA) 3.40 4.44 9.03 15.44 18.23 28.67 29.61 30.46 26.06 17.16 7.48 4.12 16.18 RELATIVE HUMIDITY (MEAN %) 67 57 48 43 38 27 28 34 29 32 46 58 42 RELATIVE HUMIDITY (MAX. %) 84 79 69 63 57 39 44 49 41 47 65 76 59 RELATIVE HUMIDITY (MIN. %) 42 32 29 26 24 16 17 21 17 20 27 36 26 RELATIVE HUMIDITY (MEAN% 03UTC) 78 73 62 53 45 33 35 42 36 40 58 71 52 RELATIVE HUMIDITY (MEAN% 09UTC) 49 40 34 29 28 17 19 24 18 21 30 39 29 RELATIVE HUMIDITY (MEAN% 15UTC) 68 55 41 37 34 22 22 30 27 33 47 60 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 48.1 24.3 40.0 32.3 23.4 0.0 0.0 0.0 0.0 0.0 8.0 7.0 183.1 DAYS WITH PRECIPITATION >=10 2 1 2 2 1 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 5 2 1 3 3 2 0 0 0 0 0 0 1 12 DAYS WITH PRECIPITATION >= 1 8 6 4 3 4 0 0 0 0 0 3 2 30 DAYS WITH PRECIPITATION 11 9 6 7 8 0 0 1 0 0 5 3 50 GREATEST DAILY PRECIPITATION 19.2 12.0 21.0 13.0 16.0 0.0 0.0 0.0 0.0 0.0 3.0 5.0 21.0 DAY 23 17 27 20 13 ** ** ** ** ** 26 15 DAY WITH THUNDER STORM 0 2 2 3 3 0 0 0 0 0 0 0 10 DAYS WITH SNOW OR SLEET 3 1 1 0 0 0 0 0 0 0 0 2 7 DAYS WITH DUST 1 1 5 7 7 7 2 2 2 3 2 0 39 WIND DIRECTION (PREVAILING) 90 90 90 90 90 135 90 90 90 135 90 90 90 PREVAILING WIND SPEED(KNOTS) 8.0 8.1 6.7 6.0 7.1 11.7 9.7 8.4 7.8 8.0 10.5 5.9 8.2 PREVAILING WIND PERCENT 26.3 19.3 23.1 18.8 26.7 30.1 35.6 30.8 30.1 21.9 22.2 15.4 24.6 CALMS PERCENT OF WIND 26.3 23.8 24.7 34.7 25.5 13.8 17.4 8.9 22.2 23.1 28.9 49.4 24.9 NO. OF WIND OBSERVATION 247 223 247 239 247 239 247 247 239 247 239 247 2908 VECTOR WIND DIRECTION (MEAN) 111 28 316 89 86 99 101 101 92 89 95 85 96 VECTOR WIND MAGNITUDE(KNOTS) 3.0 0.4 0.6 1.1 2.0 5.4 6.6 5.2 4.4 1.7 2.2 0.3 2.6 WIND STEADINESES (MEAN %) 56.6 6.3 10.5 22.9 32.8 57.4 82.5 73.2 77.2 26.2 32.4 8.8 41.3 WIND SPEED (MEAN KNOTS) 5.3 6.3 5.7 4.8 6.1 9.4 8.0 7.1 5.7 6.5 6.8 3.4 6.3 FASTEST WIND DIRECTION 90 310 90 230 130 270 120 90 100 270 130 290 130 FASTEST WIND SPEED (KNOTS) 25 27 27 25 27 25 25 20 23 25 30 27 30 DAY 16 22 14 7 11 2 13 7 9 8 26 1 DAYS WITH SKY CLEAR (0-2)/8 13 10 12 12 11 29 28 31 30 27 16 19 238 DAYS WITH P.CLOUDY (3-6)/8 9 12 14 15 13 1 3 0 0 4 9 7 87 DAYS WITH CLOUDY (7-8)/8 9 6 5 3 7 0 0 0 0 0 5 5 40 DAYS WITH VISIBILITY =< 2 KM 1 1 1 1 1 0 1 0 0 3 0 1 10 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.1 851.4 854.1 855.0 852.0 851.0 847.9 848.2 850.5 856.3 857.1 859.0 853.2 MAX. QFE PRESSURE IN HPA 861.4 858.6 859.3 861.1 856.7 857.3 878.2 852.0 855.5 863.8 863.0 865.0 878.2 DAY-HOUR 6- 6 23- 6 21- 6 8- 6 4-21 21-21 14- 9 7- 9 25-18 20- 6 22- 6 17- 6 MIN. QFE PRESSURE IN HPA 843.9 832.0 839.9 848.6 844.8 840.8 842.8 841.8 844.0 848.6 847.5 851.2 832.0 DAY-HOUR 23- 9 5-18 1- 3 19-15 29-21 28-12 2-12 24-15 1-18 30-12 8- 9 1- 9 MEAN QNH PRESSURE IN HPA 1024.0 1018.7 1021.8 1022.8 1019.4 1018.2 1014.6 1014.9 1017.6 1024.3 1025.2 1027.4 1020.7 MAX. QNH PRESSURE IN HPA 1030.2 1027.0 1027.8 1029.9 1024.8 1025.5 1049.6 1019.3 1023.4 1033.0 1032.1 1034.4 1049.6 DAY-HOUR 6- 6 23- 6 21- 6 8- 6 4-21 21-21 14- 9 7- 9 25-18 20- 6 22- 6 17- 6 MIN. QNH PRESSURE IN HPA 1010.0 996.2 1005.3 1015.4 1011.0 1006.4 1008.7 1007.5 1010.1 1015.4 1014.1 1018.4 996.2 DAY-HOUR 23- 9 5-18 1- 3 19-15 29-21 28-12 2-12 24-15 1-18 30-12 8- 9 1- 9 MEAN QFF PRESSURE IN HPA 1024.8 1019.0 1017.5 1014.1 1009.1 1004.9 1000.7 999.9 1005.2 1016.0 1023.0 1029.1 1013.6 MAX. QFF PRESSURE IN HPA 1034.1 1031.0 1029.9 1023.9 1019.0 1011.5 1035.0 1006.1 1014.7 1027.1 1032.1 1044.8 1044.8 DAY-HOUR 4- 3 23- 3 9-18 9- 3 5- 3 8- 6 14- 9 31- 3 26- 3 21- 3 22- 3 16-15 MIN. QFF PRESSURE IN HPA 1007.8 995.1 1001.2 1003.8 997.5 990.7 993.4 992.0 998.0 1005.4 1008.4 1016.8 990.7 DAY-HOUR 23- 9 5-18 1- 3 18-21 31- 9 28-12 2-12 22- 0 2-12 5-12 8- 9 12- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 856.1 850.8 853.7 854.8 852.0 851.0 848.0 848.3 850.7 856.4 857.1 859.0 853.2 MAX. QFE PRESSURE IN HPA 860.5 857.3 858.1 860.0 856.2 855.6 850.4 851.6 854.5 863.1 861.9 863.8 863.8 DAY 7 23 15 9 5 21 15 8 26 21 22 17 MIN. QFE PRESSURE IN HPA 847.9 834.3 841.4 849.0 845.4 844.2 844.3 842.2 847.1 850.4 849.0 854.2 834.3 DAY 23 11 1 20 31 28 3 22 3 31 26 13 MEAN QNH PRESSURE IN HPA 1024.1 1018.0 1021.4 1022.6 1019.3 1018.2 1014.7 1015.1 1017.8 1024.5 1025.2 1027.4 1020.7 MAX. QNH PRESSURE IN HPA 1029.2 1025.5 1026.4 1028.6 1024.2 1023.5 1017.5 1018.9 1022.2 1032.2 1030.8 1033.0 1033.0 DAY 7 23 15 9 5 21 15 8 26 21 22 17 MIN. QNH PRESSURE IN HPA 1014.6 998.9 1007.1 1015.9 1011.7 1010.3 1010.4 1008.0 1013.7 1017.5 1015.9 1021.9 998.9 DAY 23 11 1 20 31 28 3 22 3 31 26 13 MEAN QFF PRESSURE IN HPA 1024.3 1017.8 1016.8 1014.0 1009.3 1005.1 1000.8 1000.0 1005.2 1015.9 1022.6 1028.6 1013.4 MAX. QFF PRESSURE IN HPA 1032.7 1029.6 1027.5 1022.3 1017.9 1009.6 1005.3 1005.8 1013.5 1024.3 1029.7 1040.6 1040.6 DAY 4 23 10 9 5 9 16 8 26 28 22 16 MIN. QFF PRESSURE IN HPA 1010.8 1002.1 1001.7 1004.1 997.9 994.9 995.4 992.0 999.7 1007.9 1009.3 1020.6 992.0 DAY 23 11 1 19 31 29 3 22 3 5 26 13 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 856.3 852.2 854.4 855.5 852.7 851.7 848.6 849.1 851.3 857.0 857.6 859.2 853.8 MAX. QFE PRESSURE IN HPA 860.3 857.6 858.7 860.5 856.6 856.0 851.0 851.8 855.3 863.3 862.6 864.0 864.0 DAY 30 23 15 9 5 21 15 8 25 21 22 17 MIN. QFE PRESSURE IN HPA 847.1 843.9 839.9 849.0 846.2 844.3 845.4 844.7 847.8 851.3 850.8 852.6 839.9 DAY 23 17 1 20 31 28 3 3 3 5 26 1 MEAN QNH PRESSURE IN HPA 1024.3 1019.6 1022.1 1023.3 1020.1 1019.0 1015.5 1015.9 1018.5 1025.1 1025.8 1027.7 1021.4 MAX. QNH PRESSURE IN HPA 1028.9 1025.8 1027.1 1029.2 1024.7 1024.0 1018.2 1019.1 1023.2 1032.4 1031.6 1033.2 1033.2 DAY 30 23 15 9 5 21 15 8 25 21 22 17 MIN. QNH PRESSURE IN HPA 1013.7 1010.0 1005.3 1015.9 1012.6 1010.4 1011.7 1010.9 1014.5 1018.5 1018.0 1020.0 1005.3 DAY 23 17 1 20 31 28 3 3 3 5 26 1 MEAN QFF PRESSURE IN HPA 1026.2 1021.0 1019.0 1015.7 1010.4 1006.1 1002.1 1001.9 1007.8 1018.7 1025.2 1031.1 1015.4 MAX. QFF PRESSURE IN HPA 1034.1 1031.0 1028.7 1023.9 1019.0 1011.2 1006.3 1006.1 1014.7 1027.1 1032.1 1043.2 1043.2 DAY 4 23 10 9 5 8 16 31 26 21 22 16 MIN. QFF PRESSURE IN HPA 1010.9 1008.2 1001.2 1006.3 999.6 995.6 996.8 996.4 1001.6 1008.8 1012.5 1020.7 995.6 DAY 23 17 1 19 31 28 2 3 4 5 26 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 857.2 853.0 855.0 856.1 853.1 851.8 848.6 849.1 851.6 857.5 858.4 860.2 854.3 MAX. QFE PRESSURE IN HPA 861.4 858.6 859.3 861.1 856.6 855.7 854.3 851.9 855.4 863.8 863.0 865.0 865.0 DAY 6 23 21 8 7 22 3 28 25 20 22 17 MIN. QFE PRESSURE IN HPA 847.0 844.3 841.0 849.4 846.2 843.7 845.9 844.9 848.0 851.9 853.1 852.9 841.0 DAY 23 17 1 20 31 28 2 3 3 30 26 1 MEAN QNH PRESSURE IN HPA 1025.4 1020.5 1022.8 1024.0 1020.6 1019.1 1015.4 1016.0 1018.9 1025.7 1026.8 1028.9 1022.0 MAX. QNH PRESSURE IN HPA 1030.2 1027.0 1027.8 1029.9 1024.7 1023.6 1022.0 1019.2 1023.3 1033.0 1032.1 1034.4 1034.4 DAY 6 23 21 8 7 22 3 28 25 20 22 17 MIN. QNH PRESSURE IN HPA 1013.6 1010.4 1006.6 1016.3 1012.6 1009.7 1012.3 1011.1 1014.7 1019.2 1020.6 1020.4 1006.6 DAY 23 17 1 20 31 28 2 3 3 30 26 1 MEAN QFF PRESSURE IN HPA 1026.4 1020.9 1018.3 1015.0 1010.1 1005.8 1001.6 1000.7 1006.1 1016.7 1024.4 1030.5 1014.7 MAX. QFF PRESSURE IN HPA 1033.4 1029.9 1027.0 1023.7 1018.2 1011.5 1008.8 1004.9 1013.0 1024.5 1030.5 1041.2 1041.2 DAY 6 23 10 9 5 8 3 31 27 21 22 16 MIN. QFF PRESSURE IN HPA 1010.8 1008.9 1005.8 1004.9 998.5 994.4 996.8 995.5 999.6 1007.5 1017.5 1019.1 994.4 DAY 23 26 1 19 31 28 2 3 3 5 26 1 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.3 851.3 854.0 854.8 851.9 850.7 848.2 848.1 850.1 855.8 856.1 858.3 852.9 MAX. QFE PRESSURE IN HPA 859.8 856.7 857.6 860.2 855.9 854.5 878.2 852.0 854.0 861.6 860.8 863.4 878.2 DAY 6 23 15 8 5 21 14 7 25 20 22 18 MIN. QFE PRESSURE IN HPA 843.9 842.1 843.3 849.0 845.4 842.3 844.0 844.2 846.9 850.5 847.5 851.2 842.1 DAY 23 17 1 19 31 28 3 3 6 5 8 1 MEAN QNH PRESSURE IN HPA 1023.2 1018.5 1021.6 1022.6 1019.2 1017.8 1015.0 1014.8 1017.2 1023.7 1024.1 1026.6 1020.4 MAX. QNH PRESSURE IN HPA 1028.4 1024.8 1025.8 1028.8 1023.9 1022.2 1049.6 1019.3 1021.7 1030.4 1029.5 1032.5 1049.6 DAY 6 23 15 8 5 21 14 7 25 20 22 18 MIN. QNH PRESSURE IN HPA 1010.0 1007.9 1009.3 1015.9 1011.7 1008.1 1010.1 1010.3 1013.4 1017.6 1014.1 1018.4 1007.9 DAY 23 17 1 19 31 28 3 3 6 5 8 1 MEAN QFF PRESSURE IN HPA 1023.1 1018.0 1017.0 1013.3 1008.3 1004.3 1000.8 999.2 1003.8 1014.4 1020.8 1027.3 1012.5 MAX. QFF PRESSURE IN HPA 1030.7 1026.8 1026.0 1021.2 1016.7 1009.1 1035.0 1004.4 1010.3 1022.5 1026.4 1039.5 1039.5 DAY 3 23 9 3 5 16 14 7 28 21 27 16 MIN. QFF PRESSURE IN HPA 1007.8 1006.7 1009.1 1003.8 997.5 992.1 994.5 994.4 998.5 1006.4 1008.4 1016.8 992.1 DAY 23 17 24 19 31 28 2 18 3 5 8 12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 854.9 850.4 853.0 853.8 851.0 849.8 846.4 846.8 849.0 854.9 856.0 857.8 852.0 MAX. QFE PRESSURE IN HPA 859.1 855.6 856.5 859.0 854.6 854.4 849.1 850.8 853.7 861.7 860.4 863.5 863.5 DAY 6 23 20 8 7 21 15 7 25 20 22 16 MIN. QFE PRESSURE IN HPA 845.9 842.9 846.4 849.0 845.2 840.8 842.8 842.9 845.2 848.6 850.8 851.6 840.8 DAY 23 17 1 19 31 28 2 3 11 30 25 12 MEAN QNH PRESSURE IN HPA 1022.7 1017.5 1020.5 1021.4 1018.2 1016.9 1012.8 1013.3 1015.8 1022.7 1024.0 1026.1 1019.3 MAX. QNH PRESSURE IN HPA 1027.6 1023.5 1024.5 1027.4 1022.4 1022.1 1016.0 1018.0 1021.3 1030.6 1029.1 1032.6 1032.6 DAY 6 23 20 8 7 21 15 7 25 20 22 16 MIN. QNH PRESSURE IN HPA 1012.3 1008.8 1012.9 1015.9 1011.5 1006.4 1008.7 1008.8 1011.5 1015.4 1018.0 1018.9 1006.4 DAY 23 17 1 19 31 28 2 3 11 30 25 12 MEAN QFF PRESSURE IN HPA 1022.8 1017.3 1015.8 1012.6 1008.1 1003.5 998.8 998.0 1003.0 1013.9 1021.3 1027.1 1011.9 MAX. QFF PRESSURE IN HPA 1031.0 1025.5 1024.3 1020.1 1015.6 1008.2 1003.4 1004.1 1010.2 1022.2 1027.5 1041.5 1041.5 DAY 3 23 10 3 4 16 6 7 25 21 22 16 MIN. QFF PRESSURE IN HPA 1011.6 1008.0 1008.2 1006.1 997.9 990.7 993.4 992.4 998.0 1005.4 1014.1 1017.1 990.7 DAY 23 17 24 19 30 28 2 3 2 5 25 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.0 851.2 853.6 854.4 851.3 850.0 846.7 847.0 849.6 855.7 856.8 858.7 852.6 MAX. QFE PRESSURE IN HPA 859.7 856.1 857.9 859.8 855.2 855.0 849.4 850.9 854.7 862.8 860.9 863.9 863.9 DAY 6 23 20 8 4 21 15 7 25 20 22 16 MIN. QFE PRESSURE IN HPA 847.1 845.7 849.5 848.6 845.5 841.4 842.8 841.8 845.6 849.7 851.2 852.7 841.4 DAY 23 17 1 19 30 28 3 24 6 30 25 12 MEAN QNH PRESSURE IN HPA 1023.9 1018.4 1021.2 1022.1 1018.5 1017.1 1013.2 1013.6 1016.6 1023.7 1024.9 1027.1 1020.0 MAX. QNH PRESSURE IN HPA 1028.2 1024.1 1026.2 1028.4 1023.0 1022.8 1016.3 1018.1 1022.5 1031.8 1029.6 1033.1 1033.1 DAY 6 23 20 8 4 21 15 7 25 20 22 16 MIN. QNH PRESSURE IN HPA 1013.7 1012.1 1016.4 1015.4 1011.8 1007.1 1008.7 1007.5 1011.9 1016.7 1018.4 1020.2 1007.1 DAY 23 17 1 19 30 28 3 24 6 30 25 12 MEAN QFF PRESSURE IN HPA 1025.7 1019.7 1018.0 1014.2 1008.7 1004.0 999.8 999.4 1005.7 1017.2 1024.3 1030.3 1013.9 MAX. QFF PRESSURE IN HPA 1032.8 1027.7 1027.0 1022.6 1016.8 1009.0 1004.1 1004.4 1013.6 1025.8 1030.0 1044.8 1044.8 DAY 3 23 9 3 4 20 15 7 25 20 21 16 MIN. QFF PRESSURE IN HPA 1013.2 1010.7 1010.4 1006.7 998.3 991.8 994.3 993.0 999.3 1009.1 1014.5 1020.4 991.8 DAY 23 26 23 19 30 28 2 24 2 4 25 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 856.5 850.9 854.7 855.3 852.3 851.4 848.2 848.6 850.9 856.7 857.6 859.5 853.6 MAX. QFE PRESSURE IN HPA 861.1 856.8 858.9 859.3 856.5 857.2 851.1 851.5 855.5 863.4 861.8 864.0 864.0 DAY 6 22 20 7 4 21 15 7 25 20 21 16 MIN. QFE PRESSURE IN HPA 847.7 832.0 850.6 850.1 846.6 843.8 844.9 845.0 844.0 850.2 850.9 853.9 832.0 DAY 23 5 23 18 30 28 2 2 1 30 25 12 MEAN QNH PRESSURE IN HPA 1024.5 1018.1 1022.5 1023.2 1019.7 1018.7 1014.9 1015.4 1018.1 1024.7 1025.8 1028.0 1021.1 MAX. QNH PRESSURE IN HPA 1029.9 1024.9 1027.3 1027.8 1024.5 1025.4 1018.3 1018.8 1023.4 1032.5 1030.7 1033.2 1033.2 DAY 6 22 20 7 4 21 15 7 25 20 21 16 MIN. QNH PRESSURE IN HPA 1014.4 996.2 1017.7 1017.1 1013.1 1009.9 1011.1 1011.2 1010.1 1017.3 1018.1 1021.5 996.2 DAY 23 5 23 18 30 28 2 2 1 30 25 12 MEAN QFF PRESSURE IN HPA 1025.5 1018.4 1017.9 1014.0 1009.2 1005.4 1001.2 1000.2 1005.4 1015.9 1023.5 1029.7 1013.9 MAX. QFF PRESSURE IN HPA 1033.8 1028.6 1029.9 1022.9 1018.7 1011.1 1006.7 1004.3 1013.3 1025.2 1029.1 1041.1 1041.1 DAY 3 22 9 3 4 21 15 7 28 27 21 16 MIN. QFF PRESSURE IN HPA 1014.0 995.1 1007.3 1005.2 999.3 994.1 996.6 995.7 998.7 1007.8 1013.8 1021.2 994.1 DAY 23 5 23 18 30 28 2 17 2 4 25 12 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 856.4 851.7 854.7 855.3 852.2 851.5 848.3 848.8 851.1 856.8 857.3 859.2 853.6 MAX. QFE PRESSURE IN HPA 861.1 857.4 858.9 860.5 856.7 857.3 850.8 852.0 855.3 863.5 861.8 864.1 864.1 DAY 29 22 20 8 4 21 15 7 25 20 21 16 MIN. QFE PRESSURE IN HPA 848.5 844.9 850.4 850.0 844.8 844.5 843.8 845.0 847.1 850.4 849.6 854.0 843.8 DAY 23 20 23 18 29 27 29 2 2 30 25 12 MEAN QNH PRESSURE IN HPA 1024.4 1019.0 1022.5 1023.2 1019.6 1018.8 1015.1 1015.6 1018.3 1024.9 1025.4 1027.7 1021.2 MAX. QNH PRESSURE IN HPA 1029.9 1025.6 1027.3 1029.2 1024.8 1025.5 1018.0 1019.3 1023.2 1032.6 1030.7 1033.3 1033.3 DAY 29 22 20 8 4 21 15 7 25 20 21 16 MIN. QNH PRESSURE IN HPA 1015.3 1011.1 1017.5 1017.0 1011.0 1010.7 1009.9 1011.2 1013.7 1017.5 1016.6 1021.7 1009.9 DAY 23 20 23 18 29 27 29 2 2 30 25 12 MEAN QFF PRESSURE IN HPA 1024.4 1018.6 1017.7 1014.0 1008.8 1005.2 1000.9 1000.2 1005.0 1015.6 1022.0 1028.2 1013.4 MAX. QFF PRESSURE IN HPA 1033.0 1029.0 1028.8 1022.7 1018.3 1011.1 1007.4 1006.1 1012.6 1023.9 1027.6 1040.2 1040.2 DAY 3 22 9 3 4 21 5 3 25 20 26 16 MIN. QFF PRESSURE IN HPA 1013.2 1006.4 1007.3 1003.8 997.9 994.2 993.8 995.0 998.9 1008.0 1009.4 1019.6 993.8 DAY 22 8 23 18 30 28 29 17 2 4 25 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BIRJAND (40809) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 52 N LONGITUDE 59 12 E DATA PROCESSING CENTER ELEVATION 1491.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.7 10.0 8.8 14.8 21.5 27.8 28.0 27.0 22.9 16.0 9.4 4.8 16.4 MINIMUN AIR TEMPERATURE (C) -1.1 2.9 3.1 8.4 12.2 18.6 20.1 17.4 14.0 6.7 1.5 -2.7 8.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 4 18 7 1 0 0 0 31 DAYS WITH MINIMUM TEMP. <=-4 7 0 2 0 0 0 0 0 0 0 3 15 27 DAYS WITH FREEZING MIN.<= 0 21 7 8 0 0 0 0 0 0 0 15 28 79 TEMPERATURE RECORDS LOWEST(C) -7.0 -3.0 -7.0 2.0 5.0 15.0 13.0 11.0 9.0 1.0 -6.0 -7.0 -7.0 DAY 1 1 21 18 6 15 31 2 14 29 27 29 MAXIMUM AIR TEMPERATURE (C) 14.6 18.8 15.4 21.9 29.9 37.0 36.5 36.4 32.7 26.9 19.7 14.4 25.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 21 30 31 31 28 7 0 0 150 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 24.0 23.0 31.0 37.0 41.0 43.0 40.0 38.0 32.0 26.0 19.0 43.0 DAY 17 26 1 27 14 23 5 30 1 1 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 15.7 15.9 12.3 13.5 17.7 18.4 16.4 19.0 18.7 20.2 18.2 17.1 16.9 MEAN DAILY TEMP. (MDT) (C) 6.8 10.8 9.2 15.1 21.0 27.8 28.3 26.9 23.4 16.8 10.6 5.8 16.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.0 53.0 203.5 226.5 182.0 73.5 1.0 0.0 0.0 741.5 HEATING DEG. DAYS(BASE 18 0C) 347.5 208.0 271.5 101.5 21.0 0.0 0.0 0.0 0.0 58.0 222.0 377.0 1606.5 DEWPOINT (MEAN C) -4.1 -0.7 -2.2 4.4 3.8 7.0 5.7 5.1 3.8 1.3 -2.1 -4.5 1.5 MIXING RATIO (G/KG) 3.43 4.38 3.98 6.31 6.04 7.56 6.98 6.66 6.01 5.05 4.00 3.30 5.31 VAPOUR PRESSURE (HPA) 4.69 5.98 5.41 8.56 8.21 10.21 9.41 8.99 8.17 6.91 5.48 4.52 7.21 SATURATION DEF. (HPA) 5.26 7.35 6.83 9.30 19.50 29.35 30.50 28.88 21.77 13.24 7.61 4.78 15.37 RELATIVE HUMIDITY (MEAN %) 54 52 50 54 34 28 26 26 30 39 48 54 41 RELATIVE HUMIDITY (MAX. %) 73 71 71 74 50 41 39 38 41 54 67 73 58 RELATIVE HUMIDITY (MIN. %) 31 30 33 36 21 18 16 17 20 25 29 34 26 RELATIVE HUMIDITY (MEAN% 03UTC) 68 69 60 64 41 35 32 34 37 49 61 68 52 RELATIVE HUMIDITY (MEAN% 09UTC) 33 34 36 38 23 20 18 17 20 26 30 36 28 RELATIVE HUMIDITY (MEAN% 15UTC) 55 48 46 49 28 23 22 23 28 39 46 54 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.0 19.2 30.9 92.2 11.0 0.0 0.0 0.0 0.0 0.0 2.0 0.0 193.3 DAYS WITH PRECIPITATION >=10 2 1 1 5 1 0 0 0 0 0 0 0 10 DAYS WITH PRECIPITATION >= 5 2 1 3 5 1 0 0 0 0 0 0 0 12 DAYS WITH PRECIPITATION >= 1 4 4 5 11 1 0 0 0 0 0 1 0 26 DAYS WITH PRECIPITATION 4 5 9 17 1 0 1 1 0 0 1 1 40 GREATEST DAILY PRECIPITATION 22.0 12.0 14.0 31.0 11.0 0.0 0.0 0.0 0.0 0.0 2.0 0.0 31.0 DAY 10 14 25 3 2