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 ** ** ** ** ** 8 ** DAY WITH THUNDER STORM 2 2 0 11 2 1 0 0 0 0 0 0 18 DAYS WITH SNOW OR SLEET 2 0 1 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 1 5 1 2 0 2 2 0 2 1 0 16 WIND DIRECTION (PREVAILING) 90 90 270 90 90 90 90 90 90 45 45 90 90 PREVAILING WIND SPEED(KNOTS) 8.0 7.2 12.7 8.3 9.6 11.6 11.2 9.6 8.6 5.0 5.5 4.8 8.8 PREVAILING WIND PERCENT 16.9 17.7 19.0 16.3 22.3 29.3 36.0 32.4 23.4 19.8 20.5 17.8 21.4 CALMS PERCENT OF WIND 50.0 34.2 30.8 41.0 35.2 27.6 18.6 28.7 39.3 29.1 14.6 45.7 32.9 NO. OF WIND OBSERVATION 248 231 247 239 247 239 247 247 239 247 239 247 2917 VECTOR WIND DIRECTION (MEAN) 102 21 302 93 76 99 103 87 90 35 10 59 85 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.4 0.8 0.9 3.6 5.5 7.6 5.3 4.1 1.3 1.7 0.8 2.4 WIND STEADINESES (MEAN %) 23.8 6.8 9.6 15.3 55.4 67.1 83.5 77.9 74.5 27.1 31.5 29.6 39.3 WIND SPEED (MEAN KNOTS) 4.2 5.9 8.3 5.9 6.5 8.2 9.1 6.8 5.5 4.8 5.4 2.7 6.1 FASTEST WIND DIRECTION 120 310 270 120 90 90 90 90 150 140 270 290 270 FASTEST WIND SPEED (KNOTS) 27 25 29 25 28 27 27 27 23 25 25 15 29 DAY 7 10 6 15 26 7 7 14 3 23 20 2 DAYS WITH SKY CLEAR (0-2)/8 19 16 12 6 19 26 27 28 27 30 22 19 251 DAYS WITH P.CLOUDY (3-6)/8 10 10 9 16 12 4 4 3 3 1 8 12 92 DAYS WITH CLOUDY (7-8)/8 2 3 10 8 0 0 0 0 0 0 0 0 23 DAYS WITH VISIBILITY =< 2 KM 1 2 2 0 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 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 857.5 856.9 852.1 853.6 854.1 850.1 848.5 849.3 854.1 858.0 858.2 858.5 854.2 MAX. QFE PRESSURE IN HPA 863.2 867.2 859.8 863.0 860.8 855.6 854.8 852.8 858.2 864.0 863.7 869.6 869.6 DAY-HOUR 19- 6 15-12 22- 6 8- 6 5-21 3- 6 16-21 31- 6 25- 6 30- 6 16- 6 4- 3 MIN. QFE PRESSURE IN HPA 849.5 850.2 840.6 848.2 840.4 843.3 840.9 840.9 848.1 850.3 849.3 849.1 840.4 DAY-HOUR 27-18 29-12 2- 9 20-12 14-15 21-15 26- 3 10-15 2-12 11-12 20-12 30-12 MEAN QNH PRESSURE IN HPA 1025.6 1025.0 1019.5 1021.2 1021.7 1017.2 1015.3 1016.2 1021.8 1026.3 1026.5 1026.9 1021.9 MAX. QNH PRESSURE IN HPA 1032.3 1036.9 1028.4 1032.1 1029.5 1023.5 1022.6 1020.3 1026.5 1033.2 1032.9 1039.7 1039.7 DAY-HOUR 19- 6 15-12 22- 6 8- 6 5-21 3- 6 16-21 31- 6 25- 6 30- 6 16- 6 4- 3 MIN. QNH PRESSURE IN HPA 1016.4 1017.3 1006.2 1014.9 1005.9 1009.3 1006.5 1006.5 1014.8 1017.4 1016.2 1016.0 1005.9 DAY-HOUR 27-18 29-12 2- 9 20-12 14-15 21-15 26- 3 10-15 2-12 11-12 20-12 30-12 MEAN QFF PRESSURE IN HPA 1025.5 1022.0 1017.2 1015.0 1011.7 1003.3 1001.3 1002.9 1010.9 1019.6 1024.0 1027.4 1015.1 MAX. QFF PRESSURE IN HPA 1033.6 1037.2 1031.1 1027.3 1024.1 1010.6 1009.8 1007.3 1017.7 1029.7 1035.4 1042.8 1042.8 DAY-HOUR 19-15 15-12 21- 3 8- 3 6- 6 14-18 17- 6 15- 3 25- 3 30- 3 27- 3 4- 3 MIN. QFF PRESSURE IN HPA 1014.0 1011.6 999.1 1005.4 992.6 994.4 992.3 993.2 1000.3 1009.6 1009.7 1018.1 992.3 DAY-HOUR 27-12 29-12 2- 9 29-12 14-15 21-12 5-12 10-15 1-12 11-12 20- 9 30-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 857.5 856.9 851.9 853.3 854.1 850.4 848.7 849.5 854.5 857.9 858.2 858.4 854.3 MAX. QFE PRESSURE IN HPA 861.3 863.6 858.6 861.7 859.6 854.6 852.4 851.9 856.8 862.9 862.3 864.1 864.1 DAY 20 2 30 8 6 3 6 31 25 31 27 6 MIN. QFE PRESSURE IN HPA 850.6 852.3 843.9 848.9 848.7 846.1 843.8 846.8 849.8 853.0 850.0 851.1 843.8 DAY 28 10 25 21 31 21 17 12 2 12 20 30 MEAN QNH PRESSURE IN HPA 1025.7 1025.0 1019.2 1020.9 1021.7 1017.5 1015.5 1016.4 1022.2 1026.2 1026.6 1026.7 1022.0 MAX. QNH PRESSURE IN HPA 1030.1 1032.8 1027.0 1030.6 1028.1 1022.4 1019.8 1019.2 1024.9 1031.9 1031.3 1033.3 1033.3 DAY 20 2 30 8 6 3 6 31 25 31 27 6 MIN. QNH PRESSURE IN HPA 1017.7 1019.7 1010.0 1015.8 1015.5 1012.5 1009.9 1013.3 1016.8 1020.5 1017.0 1018.3 1009.9 DAY 28 10 25 21 31 21 17 12 2 12 20 30 MEAN QFF PRESSURE IN HPA 1024.8 1021.5 1016.6 1014.7 1011.8 1003.7 1001.4 1003.2 1011.1 1019.2 1023.5 1026.7 1014.8 MAX. QFF PRESSURE IN HPA 1031.0 1033.3 1030.4 1025.5 1023.0 1010.1 1009.2 1005.6 1015.5 1026.1 1032.6 1034.7 1034.7 DAY 29 2 21 8 6 15 19 2 26 31 27 5 MIN. QFF PRESSURE IN HPA 1016.2 1013.9 1002.7 1007.8 1002.3 998.2 995.6 999.1 1002.3 1012.2 1010.9 1019.3 995.6 DAY 28 10 25 29 17 21 9 12 2 9 20 30 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.8 857.3 852.4 854.0 854.8 851.2 849.1 850.0 854.8 858.5 858.7 859.2 854.8 MAX. QFE PRESSURE IN HPA 862.0 864.2 859.2 862.5 860.0 855.5 854.2 852.4 857.3 863.3 862.8 869.6 869.6 DAY 19 2 30 8 6 3 17 31 25 30 16 4 MIN. QFE PRESSURE IN HPA 850.7 852.5 843.9 849.2 849.0 846.3 840.9 847.0 850.6 853.8 850.1 854.9 840.9 DAY 28 10 12 11 31 21 26 12 2 11 20 31 MEAN QNH PRESSURE IN HPA 1026.1 1025.5 1019.9 1021.7 1022.6 1018.4 1016.0 1017.1 1022.6 1026.9 1027.1 1027.7 1022.6 MAX. QNH PRESSURE IN HPA 1030.9 1033.4 1027.7 1031.5 1028.6 1023.4 1021.9 1019.8 1025.5 1032.4 1031.8 1039.7 1039.7 DAY 19 2 30 8 6 3 17 31 25 30 16 4 MIN. QNH PRESSURE IN HPA 1017.8 1019.9 1010.0 1016.1 1015.9 1012.7 1006.5 1013.6 1017.7 1021.4 1017.1 1022.7 1006.5 DAY 28 10 12 11 31 21 26 12 2 11 20 31 MEAN QFF PRESSURE IN HPA 1027.6 1024.1 1018.4 1016.3 1013.2 1005.2 1002.7 1004.6 1012.9 1022.0 1026.5 1030.1 1017.0 MAX. QFF PRESSURE IN HPA 1033.5 1036.2 1031.1 1027.3 1024.0 1010.5 1009.4 1007.3 1017.7 1029.7 1035.4 1042.8 1042.8 DAY 1 2 21 8 6 3 18 15 25 30 27 4 MIN. QFF PRESSURE IN HPA 1017.5 1016.1 1005.4 1008.3 1003.7 998.7 993.7 1000.1 1004.7 1015.2 1012.2 1024.0 993.7 DAY 27 10 12 11 31 21 26 12 2 12 20 21 ======================================================================================================================= 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 PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.6 858.1 853.2 854.6 855.1 851.1 849.4 850.1 855.2 859.2 859.5 859.6 855.3 MAX. QFE PRESSURE IN HPA 863.2 865.0 859.8 863.0 860.7 855.6 854.2 852.8 858.2 864.0 863.7 865.3 865.3 DAY 19 2 22 8 6 3 17 31 25 30 16 5 MIN. QFE PRESSURE IN HPA 852.3 853.4 844.7 849.5 848.6 846.3 845.3 847.3 850.9 854.0 850.4 851.2 844.7 DAY 28 29 12 11 31 21 1 12 2 11 20 30 MEAN QNH PRESSURE IN HPA 1027.0 1026.4 1020.7 1022.4 1022.9 1018.3 1016.3 1017.1 1023.1 1027.6 1028.0 1028.1 1023.2 MAX. QNH PRESSURE IN HPA 1032.3 1034.4 1028.4 1032.1 1029.4 1023.5 1021.9 1020.3 1026.5 1033.2 1032.9 1034.7 1034.7 DAY 19 2 22 8 6 3 17 31 25 30 16 5 MIN. QNH PRESSURE IN HPA 1019.7 1021.0 1010.9 1016.4 1015.4 1012.7 1011.6 1013.9 1018.1 1021.7 1017.5 1018.4 1010.9 DAY 28 29 12 11 31 21 1 12 2 11 20 30 MEAN QFF PRESSURE IN HPA 1027.2 1023.8 1018.2 1016.1 1012.7 1004.3 1002.4 1003.6 1011.8 1020.4 1025.3 1028.8 1016.2 MAX. QFF PRESSURE IN HPA 1033.0 1036.7 1029.2 1027.0 1024.1 1009.8 1009.8 1006.4 1016.9 1027.0 1034.4 1037.3 1037.3 DAY 19 15 16 8 6 15 17 15 25 31 27 6 MIN. QFF PRESSURE IN HPA 1016.8 1015.5 1007.8 1007.6 1002.0 997.9 994.9 999.1 1004.4 1013.9 1011.0 1019.8 994.9 DAY 27 29 12 11 31 30 3 12 2 8 20 30 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 856.9 856.5 851.8 853.5 853.9 849.6 848.2 848.8 853.6 857.7 857.9 858.4 853.9 MAX. QFE PRESSURE IN HPA 861.5 863.3 858.2 860.9 859.3 853.0 853.0 851.1 856.7 862.4 862.2 866.1 866.1 DAY 19 15 30 8 6 14 17 31 25 30 26 19 MIN. QFE PRESSURE IN HPA 850.9 851.8 840.6 849.5 847.7 844.5 843.9 846.4 848.8 852.0 849.6 850.1 840.6 DAY 27 29 2 21 31 3 1 12 2 11 20 30 MEAN QNH PRESSURE IN HPA 1025.0 1024.6 1019.1 1021.1 1021.6 1016.5 1015.0 1015.6 1021.1 1026.0 1026.1 1026.7 1021.5 MAX. QNH PRESSURE IN HPA 1030.3 1032.4 1026.5 1029.6 1027.8 1020.5 1020.5 1018.3 1024.8 1031.4 1031.1 1035.6 1035.6 DAY 19 15 30 8 6 14 17 31 25 30 26 19 MIN. QNH PRESSURE IN HPA 1018.1 1019.1 1006.2 1016.4 1014.4 1010.7 1010.0 1012.9 1015.6 1019.3 1016.6 1017.1 1006.2 DAY 27 29 2 21 31 3 1 12 2 11 20 30 MEAN QFF PRESSURE IN HPA 1023.6 1020.7 1016.5 1014.1 1010.9 1001.9 1000.5 1001.6 1009.5 1018.3 1022.4 1025.8 1013.8 MAX. QFF PRESSURE IN HPA 1031.1 1033.3 1027.4 1024.8 1021.2 1007.8 1007.7 1004.2 1014.0 1025.3 1030.6 1033.7 1033.7 DAY 29 15 16 8 6 14 17 15 25 28 26 19 MIN. QFF PRESSURE IN HPA 1014.4 1013.1 999.1 1006.9 1001.2 995.0 993.7 997.4 1001.2 1010.5 1009.7 1018.1 993.7 DAY 27 29 2 29 31 3 9 11 2 11 20 30 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 856.4 855.7 851.1 852.3 852.8 848.7 846.9 847.9 852.4 856.7 856.9 857.5 852.9 MAX. QFE PRESSURE IN HPA 861.1 867.2 856.8 859.4 858.0 852.8 851.4 850.0 855.3 861.4 861.1 866.9 867.2 DAY 19 15 30 7 6 3 16 14 24 30 26 26 MIN. QFE PRESSURE IN HPA 850.2 850.2 843.4 848.2 847.1 843.4 842.7 845.2 848.1 850.3 849.3 849.1 842.7 DAY 27 29 9 20 17 21 8 10 2 11 20 30 MEAN QNH PRESSURE IN HPA 1024.4 1023.6 1018.3 1019.7 1020.2 1015.5 1013.4 1014.6 1019.8 1024.7 1025.0 1025.7 1020.4 MAX. QNH PRESSURE IN HPA 1029.9 1036.9 1024.9 1027.9 1026.3 1020.3 1018.6 1017.0 1023.2 1030.2 1029.9 1036.6 1036.9 DAY 19 15 30 7 6 3 16 14 24 30 26 26 MIN. QNH PRESSURE IN HPA 1017.3 1017.3 1009.4 1014.9 1013.7 1009.4 1008.6 1011.5 1014.8 1017.4 1016.2 1016.0 1008.6 DAY 27 29 9 20 17 21 8 10 2 11 20 30 MEAN QFF PRESSURE IN HPA 1023.4 1019.8 1015.6 1013.4 1010.1 1001.5 999.1 1001.1 1008.5 1017.5 1021.8 1025.6 1013.1 MAX. QFF PRESSURE IN HPA 1031.1 1037.2 1026.9 1023.5 1020.3 1008.1 1006.5 1004.2 1013.3 1024.0 1030.3 1037.1 1037.2 DAY 29 15 20 8 6 14 18 2 24 30 26 26 MIN. QFF PRESSURE IN HPA 1014.0 1011.6 1002.0 1005.4 1000.4 994.4 992.3 996.5 1000.3 1009.6 1010.1 1018.1 992.3 DAY 27 29 24 29 16 21 5 11 1 11 20 30 ======================================================================================================================= 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 PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 857.1 856.1 851.8 853.0 852.9 849.1 847.5 848.4 853.2 857.4 857.8 857.8 853.5 MAX. QFE PRESSURE IN HPA 861.9 862.6 857.7 860.0 858.9 853.3 852.5 851.3 856.1 862.2 861.9 863.7 863.7 DAY 19 2 29 7 5 14 16 14 24 30 26 5 MIN. QFE PRESSURE IN HPA 849.9 850.6 844.0 848.7 840.4 843.3 843.2 840.9 848.8 851.5 850.6 851.0 840.4 DAY 27 29 24 11 14 21 8 10 2 11 19 30 MEAN QNH PRESSURE IN HPA 1025.3 1024.1 1019.1 1020.5 1020.4 1016.0 1014.2 1015.2 1020.7 1025.6 1026.1 1026.1 1021.1 MAX. QNH PRESSURE IN HPA 1030.8 1031.6 1025.9 1028.6 1027.3 1020.8 1019.9 1018.5 1024.1 1031.1 1030.8 1032.9 1032.9 DAY 19 2 29 7 5 14 16 14 24 30 26 5 MIN. QNH PRESSURE IN HPA 1016.9 1017.7 1010.1 1015.5 1005.9 1009.3 1009.2 1006.5 1015.6 1018.8 1017.7 1018.2 1005.9 DAY 27 29 24 11 14 21 8 10 2 11 19 30 MEAN QFF PRESSURE IN HPA 1026.7 1022.4 1017.6 1015.0 1010.8 1002.6 1000.8 1002.6 1010.9 1020.5 1025.4 1028.3 1015.3 MAX. QFF PRESSURE IN HPA 1033.6 1034.7 1029.5 1024.0 1021.8 1008.8 1008.1 1005.9 1015.7 1028.0 1032.8 1036.6 1036.6 DAY 19 15 20 8 5 14 17 14 26 30 26 5 MIN. QFF PRESSURE IN HPA 1014.8 1014.2 1004.6 1009.0 992.6 994.6 993.6 993.2 1003.0 1012.5 1012.7 1021.5 992.6 DAY 27 29 24 11 14 21 8 10 2 8 19 30 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 857.7 857.1 852.7 854.2 854.4 850.5 849.2 850.0 854.7 858.5 858.6 858.6 854.7 MAX. QFE PRESSURE IN HPA 862.2 863.1 858.7 862.1 860.4 854.5 854.4 852.5 857.8 863.0 862.8 864.7 864.7 DAY 19 1 30 7 5 14 16 14 24 30 26 5 MIN. QFE PRESSURE IN HPA 849.5 850.8 844.4 849.8 849.3 845.1 844.9 847.0 850.0 853.0 851.3 852.0 844.4 DAY 27 29 9 20 30 30 8 11 2 11 19 30 MEAN QNH PRESSURE IN HPA 1026.0 1025.3 1020.1 1021.9 1022.2 1017.6 1016.1 1017.0 1022.5 1026.8 1026.9 1027.0 1022.4 MAX. QNH PRESSURE IN HPA 1031.1 1032.2 1027.1 1031.0 1029.1 1022.2 1022.1 1019.9 1026.1 1032.1 1031.8 1034.0 1034.0 DAY 19 1 30 7 5 14 16 14 24 30 26 5 MIN. QNH PRESSURE IN HPA 1016.4 1018.0 1010.6 1016.8 1016.2 1011.4 1011.1 1013.6 1017.0 1020.5 1018.5 1019.3 1010.6 DAY 27 29 9 20 30 30 8 11 2 11 19 30 MEAN QFF PRESSURE IN HPA 1026.2 1022.5 1017.7 1015.5 1011.9 1003.7 1002.2 1003.5 1011.4 1019.8 1024.3 1027.6 1015.5 MAX. QFF PRESSURE IN HPA 1032.4 1034.0 1030.6 1024.6 1023.7 1010.6 1008.7 1007.1 1016.3 1026.5 1032.8 1036.4 1036.4 DAY 19 15 20 7 5 14 16 14 24 30 26 5 MIN. QFF PRESSURE IN HPA 1014.1 1012.4 1005.5 1008.1 1003.0 996.0 993.7 999.1 1003.9 1011.1 1012.2 1020.4 993.7 DAY 27 29 9 29 31 30 2 11 2 8 19 30 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 857.7 857.2 852.4 854.1 854.7 850.8 849.4 850.0 854.8 858.3 858.4 858.5 854.7 MAX. QFE PRESSURE IN HPA 862.4 863.7 858.9 862.0 860.8 854.9 854.8 852.2 857.4 862.9 862.7 864.5 864.5 DAY 19 1 29 7 5 2 16 30 24 30 26 5 MIN. QFE PRESSURE IN HPA 850.1 852.8 845.0 849.5 849.1 846.2 845.2 847.0 850.6 853.0 850.7 851.2 845.0 DAY 27 9 9 20 30 21 8 11 1 11 19 29 MEAN QNH PRESSURE IN HPA 1025.9 1025.4 1019.8 1021.8 1022.4 1017.9 1016.3 1017.0 1022.6 1026.6 1026.8 1026.9 1022.4 MAX. QNH PRESSURE IN HPA 1031.4 1032.9 1027.3 1030.9 1029.5 1022.7 1022.6 1019.6 1025.6 1031.9 1031.7 1033.8 1033.8 DAY 19 1 29 7 5 2 16 30 24 30 26 5 MIN. QNH PRESSURE IN HPA 1017.1 1020.3 1011.2 1016.4 1016.0 1012.6 1011.5 1013.6 1017.7 1020.5 1017.8 1018.4 1011.2 DAY 27 9 9 20 30 21 8 11 1 11 19 29 MEAN QFF PRESSURE IN HPA 1024.7 1021.6 1017.0 1015.0 1012.0 1003.6 1001.8 1003.1 1010.9 1019.0 1023.1 1026.1 1014.8 MAX. QFF PRESSURE IN HPA 1031.6 1033.7 1031.0 1024.4 1023.8 1010.5 1008.1 1005.9 1015.8 1025.8 1032.6 1034.4 1034.4 DAY 29 14 20 7 5 14 16 15 24 30 26 5 MIN. QFF PRESSURE IN HPA 1015.3 1014.4 1005.3 1009.1 1003.2 998.0 995.4 999.1 1003.1 1010.6 1010.7 1019.0 995.4 DAY 27 9 9 20 30 29 8 11 1 8 19 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 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.2 5.2 12.2 14.3 24.8 30.0 32.1 29.2 28.6 20.2 12.9 8.9 18.6 MINIMUN AIR TEMPERATURE (C) -2.1 -2.4 5.8 9.2 16.6 20.2 22.6 18.9 16.5 7.4 3.4 0.1 9.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 3 16 28 4 5 0 0 0 56 DAYS WITH MINIMUM TEMP. <=-4 13 12 1 0 0 0 0 0 0 0 0 1 27 DAYS WITH FREEZING MIN.<= 0 22 22 3 0 0 0 0 0 0 3 4 21 75 TEMPERATURE RECORDS LOWEST(C) -10.0 -9.0 -4.0 2.0 11.0 12.0 19.0 15.0 8.0 -3.0 -3.0 -4.0 -10.0 DAY 2 2 5 5 2 9 21 27 27 29 26 18 MAXIMUM AIR TEMPERATURE (C) 11.5 12.4 19.8 21.3 32.4 34.6 36.7 34.3 34.4 26.7 18.9 14.8 24.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 25 28 31 31 29 7 0 0 155 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 21.0 28.0 36.0 38.0 40.0 41.0 40.0 38.0 33.0 25.0 18.0 41.0 DAY 21 25 26 29 27 6 11 8 12 5 6 7 DIF. BETWEEN (MAX.-MIN.) (C) 13.6 14.8 14.0 12.1 15.8 14.4 14.1 15.4 17.9 19.3 15.5 14.7 15.1 MEAN DAILY TEMP. (MDT) (C) 4.7 5.0 12.8 15.2 24.5 27.4 29.7 26.6 25.4 17.1 11.2 7.5 17.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 14.0 114.5 194.0 268.5 174.0 139.0 6.5 0.0 0.0 910.5 HEATING DEG. DAYS(BASE 18 0C) 413.0 364.5 164.5 121.5 0.0 0.0 0.0 0.0 0.0 59.5 205.0 327.0 1655.0 DEWPOINT (MEAN C) -1.9 -2.8 1.6 3.8 7.0 8.2 10.5 8.6 11.1 -0.7 -1.8 -1.5 3.5 MIXING RATIO (G/KG) 4.15 3.82 5.36 6.08 7.75 8.74 9.88 8.67 10.75 4.63 4.24 4.17 6.52 VAPOUR PRESSURE (HPA) 5.67 5.22 7.28 8.26 10.49 11.76 13.24 11.65 14.38 6.32 5.80 5.69 8.81 SATURATION DEF. (HPA) 3.26 4.40 7.78 9.53 22.81 32.17 35.80 30.08 26.74 19.12 10.08 6.34 17.34 RELATIVE HUMIDITY (MEAN %) 66 59 52 54 35 28 28 29 36 26 41 51 42 RELATIVE HUMIDITY (MAX. %) 82 77 74 72 47 38 38 42 48 40 62 71 58 RELATIVE HUMIDITY (MIN. %) 47 40 36 37 24 23 22 21 29 18 29 35 30 RELATIVE HUMIDITY (MEAN% 03UTC) 77 63 60 66 45 37 38 42 47 37 57 69 53 RELATIVE HUMIDITY (MEAN% 09UTC) 55 51 42 41 26 24 24 24 32 20 32 41 34 RELATIVE HUMIDITY (MEAN% 15UTC) 67 57 46 48 29 27 28 29 35 26 44 53 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.0 12.0 23.0 61.0 0.0 0.0 0.0 0.0 0.0 0.0 12.0 9.0 148.0 DAYS WITH PRECIPITATION >=10 1 0 0 3 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 2 1 2 6 0 0 0 0 0 0 1 1 13 DAYS WITH PRECIPITATION >= 1 4 4 5 10 0 0 0 0 0 0 3 2 28 DAYS WITH PRECIPITATION 6 5 6 12 1 0 0 0 1 0 6 5 42 GREATEST DAILY PRECIPITATION 15.0 6.0 7.0 12.0 0.0 0.0 0.0 0.0 0.0 0.0 5.0 7.0 15.0 DAY 4 3 31 10 ** ** ** ** ** ** 25 23 DAY WITH THUNDER STORM 1 0 3 2 0 0 0 1 0 0 0 0 7 DAYS WITH SNOW OR SLEET 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 2 2 8 1 0 11 1 4 0 0 1 0 30 WIND DIRECTION (PREVAILING) 90 90 45 90 90 90 45 45 45 45 45 270 45 PREVAILING WIND SPEED(KNOTS) 6.1 4.4 4.3 4.5 6.1 7.9 7.5 7.6 6.0 4.3 4.8 7.9 6.0 PREVAILING WIND PERCENT 22.3 36.3 19.4 25.9 27.2 44.7 45.2 51.3 56.0 40.6 18.0 16.1 25.2 CALMS PERCENT OF WIND 51.0 42.2 24.7 24.3 25.1 14.0 4.5 1.3 2.7 18.7 25.3 33.5 24.3 NO. OF WIND OBSERVATION 247 223 247 239 195 150 155 156 150 155 150 155 2222 VECTOR WIND DIRECTION (MEAN) 75 71 164 86 79 106 66 60 61 55 83 298 73 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.1 0.7 1.8 2.6 6.0 7.0 6.8 5.1 2.2 0.5 1.2 2.7 WIND STEADINESES (MEAN %) 46.9 36.7 15.2 43.9 57.8 82.2 88.6 86.1 79.7 56.4 12.5 27.9 52.9 WIND SPEED (MEAN KNOTS) 3.2 3.0 4.6 4.1 4.5 7.3 7.9 7.9 6.4 3.9 4.0 4.3 5.1 FASTEST WIND DIRECTION 90 90 270 90 180 50 10 50 90 90 20 180 90 FASTEST WIND SPEED (KNOTS) 25 13 25 18 18 22 16 16 13 13 14 18 25 DAY 3 9 13 25 21 28 16 12 3 5 10 14 DAYS WITH SKY CLEAR (0-2)/8 15 16 8 9 20 24 31 30 27 30 22 18 250 DAYS WITH P.CLOUDY (3-6)/8 9 5 12 8 7 2 0 1 3 1 5 11 64 DAYS WITH CLOUDY (7-8)/8 7 7 11 13 4 4 0 0 0 0 3 2 51 DAYS WITH VISIBILITY =< 2 KM 0 1 2 0 0 0 0 1 0 0 0 0 4 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 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.7 854.7 854.0 854.1 853.4 851.6 847.8 849.2 849.5 856.6 857.1 855.8 853.4 MAX. QFE PRESSURE IN HPA 863.8 862.5 861.8 860.4 859.0 857.2 852.2 854.8 856.8 862.4 863.0 864.4 864.4 DAY-HOUR 10- 6 22- 6 4-18 21- 6 14-21 10- 6 23- 3 10- 3 29- 6 31- 6 2- 6 4- 6 MIN. QFE PRESSURE IN HPA 850.2 845.8 845.2 845.0 843.0 843.6 844.6 844.8 844.6 850.2 848.8 846.6 843.0 DAY-HOUR 27-12 17-12 13-12 9- 0 30-15 7- 3 30-12 8-12 10-15 1-12 24-12 22-15 MEAN QNH PRESSURE IN HPA 1024.7 1022.4 1021.6 1021.8 1020.9 1018.9 1014.5 1016.1 1016.4 1024.6 1025.2 1023.7 1020.9 MAX. QNH PRESSURE IN HPA 1033.0 1031.5 1030.7 1029.1 1027.4 1025.4 1019.6 1022.6 1024.9 1031.4 1032.1 1033.7 1033.7 DAY-HOUR 10- 6 22- 6 4-18 21- 6 14-21 10- 6 23- 3 10- 3 29- 6 31- 6 2- 6 4- 6 MIN. QNH PRESSURE IN HPA 1017.3 1012.2 1011.5 1011.2 1008.9 1009.6 1010.8 1011.0 1010.8 1017.3 1015.6 1013.1 1008.9 DAY-HOUR 27-12 17-12 13-12 9- 0 30-15 7- 3 30-12 8-12 10-15 1-12 24-12 22-15 MEAN QFF PRESSURE IN HPA 1025.5 1022.5 1017.0 1016.0 1010.6 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1038.9 1034.4 1030.7 1024.9 1018.0 ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 10- 6 23- 3 4-18 5- 3 2- 6 **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1011.3 1009.6 1003.6 1005.8 994.9 ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 22- 0 17-12 13-12 9- 9 30- 3 **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 856.8 854.7 853.9 853.8 854.8 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 862.4 862.0 860.2 859.0 858.0 ****** ****** ****** ****** ****** ****** ****** ****** DAY 11 23 5 21 15 ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 851.2 847.0 848.8 845.0 852.4 ****** ****** ****** ****** ****** ****** ****** ****** DAY 31 18 14 9 9 ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1024.9 1022.4 1021.5 1021.4 1022.6 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1031.4 1030.9 1028.8 1027.4 1026.3 ****** ****** ****** ****** ****** ****** ****** ****** DAY 11 23 5 21 15 ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1018.4 1013.6 1015.6 1011.2 1019.8 ****** ****** ****** ****** ****** ****** ****** ****** DAY 31 18 14 9 9 ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1025.0 1022.2 1016.8 1015.6 1011.8 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.6 1034.2 1029.0 1023.8 1016.6 ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 23 5 4 2 ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1011.3 1010.8 1009.4 1008.0 1006.9 ****** ****** ****** ****** ****** ****** ****** ****** DAY 22 16 14 16 9 ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.0 854.7 854.1 854.3 853.6 852.5 848.9 850.2 850.3 857.1 857.6 856.2 853.9 MAX. QFE PRESSURE IN HPA 862.9 861.0 860.4 860.0 858.2 857.0 852.2 854.8 856.2 861.0 862.0 863.9 863.9 DAY 10 22 4 21 15 10 23 10 29 31 2 4 MIN. QFE PRESSURE IN HPA 851.2 849.2 848.0 845.2 843.2 843.6 846.5 848.0 846.6 850.6 851.8 848.5 843.2 DAY 31 3 13 9 30 7 30 1 11 3 24 23 MEAN QNH PRESSURE IN HPA 1025.1 1022.4 1021.7 1022.0 1021.1 1019.9 1015.7 1017.3 1017.4 1025.2 1025.8 1024.2 1021.5 MAX. QNH PRESSURE IN HPA 1031.9 1029.8 1029.1 1028.6 1026.5 1025.1 1019.6 1022.6 1024.2 1029.8 1030.9 1033.1 1033.1 DAY 10 22 4 21 15 10 23 10 29 31 2 4 MIN. QNH PRESSURE IN HPA 1018.4 1016.1 1014.7 1011.5 1009.2 1009.6 1013.0 1014.7 1013.1 1017.7 1019.1 1015.3 1009.2 DAY 31 3 13 9 30 7 30 1 11 3 24 23 MEAN QFF PRESSURE IN HPA 1027.1 1024.3 1018.3 1017.1 1010.1 1006.9 1001.2 1004.7 1005.6 1019.6 1024.2 1024.7 1015.3 MAX. QFF PRESSURE IN HPA 1038.0 1034.4 1028.9 1024.9 1017.8 1015.9 1005.5 1011.2 1017.1 1029.2 1030.7 1033.9 1038.0 DAY 10 23 4 5 3 10 23 10 30 28 26 3 MIN. QFF PRESSURE IN HPA 1013.5 1013.8 1008.0 1008.6 994.9 994.7 997.9 999.9 999.1 1009.3 1014.2 1012.1 994.7 DAY 22 16 9 2 30 7 15 1 11 3 24 23 ======================================================================================================================= 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 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 857.9 855.7 855.1 855.2 853.9 852.5 848.7 850.1 850.7 857.8 858.4 857.4 854.5 MAX. QFE PRESSURE IN HPA 863.8 862.5 861.4 860.4 858.4 857.2 852.2 854.2 856.8 862.4 863.0 864.4 864.4 DAY 10 22 4 21 14 10 24 10 29 31 2 4 MIN. QFE PRESSURE IN HPA 852.5 850.0 848.1 846.0 843.5 844.4 846.3 847.6 846.8 852.6 852.1 850.1 843.5 DAY 30 3 13 9 30 7 30 1 11 1 24 22 MEAN QNH PRESSURE IN HPA 1026.1 1023.6 1023.0 1023.1 1021.5 1019.9 1015.5 1017.2 1017.9 1026.1 1026.7 1025.5 1022.2 MAX. QNH PRESSURE IN HPA 1033.0 1031.5 1030.2 1029.1 1026.7 1025.4 1019.6 1021.9 1024.9 1031.4 1032.1 1033.7 1033.7 DAY 10 22 4 21 14 10 24 10 29 31 2 4 MIN. QNH PRESSURE IN HPA 1019.9 1017.0 1014.8 1012.4 1009.5 1010.6 1012.7 1014.3 1013.3 1020.0 1019.5 1017.1 1009.5 DAY 30 3 13 9 30 7 30 1 11 1 24 22 MEAN QFF PRESSURE IN HPA 1027.3 1023.8 1018.3 1017.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1038.9 1034.0 1029.0 1024.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 4 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1017.0 1015.4 1008.9 1008.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 22 16 13 2 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 856.9 855.0 854.4 854.3 853.3 851.8 847.8 849.1 849.5 856.6 856.9 855.5 853.4 MAX. QFE PRESSURE IN HPA 862.4 862.0 861.0 859.6 858.0 857.0 851.2 852.4 855.2 861.6 862.0 862.8 862.8 DAY 10 22 4 21 14 10 24 10 29 31 1 4 MIN. QFE PRESSURE IN HPA 851.5 848.8 847.0 845.0 843.5 844.8 845.1 846.3 846.2 851.8 850.1 847.3 843.5 DAY 30 17 13 9 30 7 30 1 11 2 24 22 MEAN QNH PRESSURE IN HPA 1025.0 1022.8 1022.1 1022.0 1020.8 1019.1 1014.5 1016.0 1016.5 1024.6 1025.1 1023.4 1021.0 MAX. QNH PRESSURE IN HPA 1031.4 1030.9 1029.8 1028.1 1026.3 1025.1 1018.4 1019.8 1023.0 1030.4 1030.9 1031.8 1031.8 DAY 10 22 4 21 14 10 24 10 29 31 1 4 MIN. QNH PRESSURE IN HPA 1018.8 1015.6 1013.6 1011.2 1009.5 1011.0 1011.4 1012.7 1012.6 1019.1 1017.1 1013.9 1009.5 DAY 30 17 13 9 30 7 30 1 11 2 24 22 MEAN QFF PRESSURE IN HPA 1024.6 1021.6 1016.6 1015.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.0 1032.7 1027.4 1023.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 5 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1014.3 1012.5 1005.7 1005.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 22 17 13 9 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.5 853.9 853.2 853.4 852.0 850.8 846.9 848.2 848.3 855.5 856.0 854.7 852.4 MAX. QFE PRESSURE IN HPA 860.7 861.0 859.8 858.8 857.4 856.2 849.9 851.6 854.2 860.5 861.4 861.5 861.5 DAY 10 22 4 21 14 10 19 12 29 31 1 4 MIN. QFE PRESSURE IN HPA 850.2 845.8 845.2 845.2 843.2 844.0 844.6 844.8 845.0 850.2 848.8 846.7 843.2 DAY 27 17 13 9 30 7 30 8 10 1 24 22 MEAN QNH PRESSURE IN HPA 1023.4 1021.5 1020.8 1020.9 1019.4 1017.9 1013.4 1014.9 1015.1 1023.4 1023.9 1022.4 1019.8 MAX. QNH PRESSURE IN HPA 1029.4 1029.8 1028.4 1027.2 1025.6 1024.2 1016.9 1018.9 1021.9 1029.2 1030.2 1030.3 1030.3 DAY 10 22 4 21 14 10 19 12 29 31 1 4 MIN. QNH PRESSURE IN HPA 1017.3 1012.2 1011.5 1011.5 1009.2 1010.1 1010.8 1011.0 1011.2 1017.3 1015.6 1013.2 1009.2 DAY 27 17 13 9 30 7 30 8 10 1 24 22 MEAN QFF PRESSURE IN HPA 1023.4 1020.9 1015.9 1014.9 1010.4 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.1 1032.8 1027.2 1022.0 1015.0 ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 21 2 ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1011.8 1009.6 1003.6 1007.2 1004.7 ****** ****** ****** ****** ****** ****** ****** ****** DAY 21 17 13 30 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 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.0 854.0 853.2 853.4 852.1 850.5 846.7 848.3 848.6 855.9 856.6 855.4 852.6 MAX. QFE PRESSURE IN HPA 861.0 861.0 859.8 858.8 857.9 856.0 850.6 851.6 854.5 861.0 861.4 862.0 862.0 DAY 10 22 4 21 14 10 24 12 29 31 1 3 MIN. QFE PRESSURE IN HPA 850.8 845.8 847.0 845.6 843.0 843.8 845.0 845.0 844.6 850.8 851.5 846.6 843.0 DAY 30 17 9 2 30 6 1 8 10 1 24 22 MEAN QNH PRESSURE IN HPA 1024.0 1021.7 1020.8 1020.9 1019.5 1017.6 1013.2 1015.1 1015.4 1023.9 1024.6 1023.3 1020.0 MAX. QNH PRESSURE IN HPA 1029.8 1029.8 1028.4 1027.2 1026.2 1024.0 1017.7 1018.9 1022.2 1029.8 1030.2 1030.9 1030.9 DAY 10 22 4 21 14 10 24 12 29 31 1 3 MIN. QNH PRESSURE IN HPA 1018.0 1012.2 1013.6 1011.9 1008.9 1009.9 1011.2 1011.2 1010.8 1018.0 1018.8 1013.1 1008.9 DAY 30 17 9 2 30 6 1 8 10 1 24 22 MEAN QFF PRESSURE IN HPA 1025.9 1023.1 1017.2 1015.8 1008.5 1004.4 998.5 1002.4 1003.3 1018.2 1023.0 1023.7 1013.7 MAX. QFF PRESSURE IN HPA 1035.2 1033.3 1029.4 1024.0 1017.9 1013.5 1003.0 1008.0 1013.5 1029.9 1029.6 1031.7 1035.2 DAY 10 22 4 4 2 9 19 10 28 28 26 4 MIN. QFF PRESSURE IN HPA 1013.4 1012.3 1006.6 1006.9 995.5 996.0 995.0 996.7 996.9 1009.4 1014.3 1009.9 995.0 DAY 21 17 9 30 30 6 11 8 11 6 23 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 856.7 854.8 854.0 854.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 862.7 862.0 861.8 859.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 21 ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 851.3 847.2 848.0 847.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 30 17 17 8 ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1024.8 1022.6 1021.7 1022.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1031.7 1030.9 1030.7 1027.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 21 ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1018.5 1013.8 1014.7 1013.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 30 17 17 8 ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1026.0 1022.7 1017.1 1016.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1038.1 1033.1 1030.7 1023.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 4 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1015.4 1012.6 1008.7 1007.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 21 17 17 30 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 856.7 854.8 853.8 854.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 862.0 862.0 860.2 859.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 21 ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 851.2 847.2 847.0 845.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 21 17 9 8 ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1024.8 1022.6 1021.5 1021.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1030.9 1030.9 1028.8 1027.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 21 ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1018.4 1013.8 1013.6 1012.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 21 17 9 8 ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1024.6 1021.8 1016.1 1015.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.4 1032.5 1027.9 1023.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 10 22 4 4 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1011.9 1010.3 1007.2 1007.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 21 17 13 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 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.6 10.1 13.3 17.1 23.2 25.7 27.4 24.5 20.1 16.6 8.2 5.6 16.4 MINIMUN AIR TEMPERATURE (C) -1.6 2.8 6.3 10.0 15.1 17.1 20.1 17.2 10.9 7.6 0.3 -0.5 8.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 3 12 3 0 0 0 0 19 DAYS WITH MINIMUM TEMP. <=-4 14 3 1 0 0 0 0 0 0 0 12 8 38 DAYS WITH FREEZING MIN.<= 0 20 11 3 0 0 0 0 0 0 1 16 16 67 TEMPERATURE RECORDS LOWEST(C) -8.0 -5.0 -4.0 4.0 10.0 12.0 15.0 12.0 2.0 -1.0 -9.0 -9.0 -9.0 DAY 20 15 4 8 2 12 9 29 28 13 28 1 MAXIMUM AIR TEMPERATURE (C) 12.8 18.2 21.4 24.8 31.5 33.8 34.4 32.5 29.8 26.5 17.7 13.5 24.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 21 29 30 30 18 3 0 0 132 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.0 24.0 28.0 30.0 38.0 39.0 40.0 38.0 34.0 30.0 26.0 18.0 40.0 DAY 7 18 28 16 27 10 15 23 13 9 8 6 DIF. BETWEEN (MAX.-MIN.) (C) 14.4 15.4 15.1 14.8 16.4 16.7 14.3 15.3 18.9 18.9 17.4 14.0 15.9 MEAN DAILY TEMP. (MDT) (C) 5.6 10.5 13.9 17.4 23.3 25.5 27.2 24.8 20.4 17.1 9.0 6.5 16.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.5 1.5 81.5 134.0 187.5 119.0 38.0 2.5 0.0 0.0 564.5 HEATING DEG. DAYS(BASE 18 0C) 384.0 210.5 136.0 41.0 0.0 0.0 0.0 0.0 23.0 50.0 270.5 357.0 1472.0 DEWPOINT (MEAN C) -5.9 -4.9 -2.7 2.0 2.1 1.2 0.7 0.7 -4.9 -3.3 -7.6 -4.3 -2.2 MIXING RATIO (G/KG) 3.04 3.32 3.97 5.56 5.38 5.20 4.87 4.90 3.43 3.76 2.89 3.57 4.16 VAPOUR PRESSURE (HPA) 4.16 4.53 5.40 7.54 7.31 7.04 6.59 6.65 4.68 5.15 3.97 4.88 5.66 SATURATION DEF. (HPA) 4.97 8.83 11.16 12.95 22.79 27.69 31.15 25.70 20.96 15.34 8.38 4.81 16.23 RELATIVE HUMIDITY (MEAN %) 50 38 39 41 27 23 19 23 21 28 36 54 33 RELATIVE HUMIDITY (MAX. %) 73 58 61 62 44 36 31 39 36 40 57 79 51 RELATIVE HUMIDITY (MIN. %) 29 22 20 23 15 13 12 13 11 17 18 35 19 RELATIVE HUMIDITY (MEAN% 03UTC) 63 50 55 53 37 30 26 30 31 36 50 68 44 RELATIVE HUMIDITY (MEAN% 09UTC) 32 25 26 26 17 16 12 14 12 17 21 38 21 RELATIVE HUMIDITY (MEAN% 15UTC) 47 32 31 36 22 18 15 18 16 28 38 57 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 9.0 0.0 32.0 43.1 1.0 0.0 0.0 0.0 0.0 0.0 0.0 14.6 99.7 DAYS WITH PRECIPITATION >=10 0 0 1 1 0 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 5 1 0 3 2 0 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 1 1 0 7 9 1 0 0 0 0 0 0 4 22 DAYS WITH PRECIPITATION 1 2 10 12 1 0 0 0 0 1 3 5 35 GREATEST DAILY PRECIPITATION 9.0 0.0 10.0 18.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 10.0 18.0 DAY 16 ** 15 22 11 ** ** ** ** ** ** 15 DAY WITH THUNDER STORM 1 0 3 6 0 0 0 0 0 1 0 0 11 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH DUST 2 7 4 6 5 12 12 12 3 4 1 1 69 WIND DIRECTION (PREVAILING) 45 45 45 45 45 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 5.7 6.3 5.9 8.0 6.0 7.5 8.7 6.8 5.8 4.6 4.8 6.5 6.6 PREVAILING WIND PERCENT 22.7 25.9 25.1 19.2 26.2 40.4 52.5 46.6 28.9 23.4 22.9 32.1 30.5 CALMS PERCENT OF WIND 27.5 23.7 24.3 20.0 16.9 13.3 8.7 13.8 15.9 31.5 30.4 26.8 21.1 NO. OF WIND OBSERVATION 247 224 247 240 248 240 242 247 239 248 240 246 2908 VECTOR WIND DIRECTION (MEAN) 57 85 41 34 15 44 43 50 55 12 26 36 43 VECTOR WIND MAGNITUDE(KNOTS) 2.2 0.3 0.5 0.3 2.0 4.3 6.7 5.1 3.1 1.1 1.0 2.0 2.3 WIND STEADINESES (MEAN %) 52.4 5.8 10.9 5.8 40.8 66.2 89.3 85.0 72.1 33.3 29.4 48.8 46.9 WIND SPEED (MEAN KNOTS) 4.2 5.2 4.6 5.2 4.9 6.5 7.5 6.0 4.3 3.3 3.4 4.1 4.9 FASTEST WIND DIRECTION 230 220 210 150 160 360 40 70 50 210 60 90 220 FASTEST WIND SPEED (KNOTS) 15 35 25 30 20 20 28 16 18 15 10 12 35 DAY 9 18 28 21 2 13 27 5 4 11 24 2 DAYS WITH SKY CLEAR (0-2)/8 21 11 13 7 19 28 30 30 29 30 20 16 254 DAYS WITH P.CLOUDY (3-6)/8 9 11 13 14 7 2 0 1 1 1 8 12 79 DAYS WITH CLOUDY (7-8)/8 1 6 5 9 5 0 0 0 0 0 2 3 31 DAYS WITH VISIBILITY =< 2 KM 1 3 3 3 0 0 4 2 3 1 1 1 22 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 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.0 853.9 852.7 851.9 852.4 850.7 849.0 851.2 854.0 857.7 859.6 856.9 853.8 MAX. QFE PRESSURE IN HPA 863.7 863.1 860.2 858.5 858.9 857.1 853.7 857.4 861.4 864.5 866.7 863.9 866.7 DAY-HOUR 19- 6 11- 6 3- 6 19- 6 17- 6 2- 6 31- 3 26- 3 25-18 27- 6 23- 6 1- 6 MIN. QFE PRESSURE IN HPA 849.0 846.1 842.4 842.9 845.1 843.5 844.7 845.9 848.3 850.6 855.3 851.2 842.4 DAY-HOUR 27-12 18-12 28-18 5-21 11-12 10-12 14-12 2-12 17-12 10-12 3-12 25-12 MEAN QNH PRESSURE IN HPA 1023.9 1021.6 1020.2 1019.2 1019.9 1017.9 1015.8 1018.5 1021.7 1025.9 1028.2 1025.0 1021.5 MAX. QNH PRESSURE IN HPA 1032.9 1032.2 1028.8 1026.9 1027.3 1025.2 1021.3 1025.6 1030.2 1033.8 1036.3 1033.1 1036.3 DAY-HOUR 19- 6 11- 6 3- 6 19- 6 17- 6 2- 6 31- 3 26- 3 25-18 27- 6 23- 6 1- 6 MIN. QNH PRESSURE IN HPA 1015.9 1012.5 1008.2 1008.8 1011.4 1009.5 1010.9 1012.3 1015.1 1017.7 1023.2 1018.4 1008.2 DAY-HOUR 27-12 18-12 28-18 5-21 11-12 10-12 14-12 2-12 17-12 10-12 3-12 25-12 MEAN QFF PRESSURE IN HPA 1024.5 1018.6 1015.0 1011.7 1008.8 1005.4 1002.3 1006.7 1012.6 1019.0 1026.6 1024.9 1014.7 MAX. QFF PRESSURE IN HPA 1037.2 1033.5 1030.6 1020.4 1017.0 1013.9 1010.1 1014.5 1026.8 1027.9 1037.6 1037.9 1037.9 DAY-HOUR 20- 3 11- 6 4- 3 19- 3 17- 6 2- 3 31- 3 27- 3 25-15 27- 3 24- 3 1- 3 MIN. QFF PRESSURE IN HPA 1011.9 1005.1 997.8 997.6 999.3 994.6 996.8 998.7 1003.5 1007.1 1016.4 1014.7 994.6 DAY-HOUR 9- 9 21- 0 28-18 5-21 11-12 10- 9 14-12 3-12 17-12 10- 9 3- 9 9-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 855.7 853.9 852.4 851.6 852.5 850.9 849.2 851.4 854.0 857.7 859.5 856.7 853.8 MAX. QFE PRESSURE IN HPA 861.9 860.4 859.0 856.5 857.8 856.3 853.0 855.9 860.0 862.9 866.3 861.3 866.3 DAY 20 1 4 20 17 2 31 26 26 27 23 2 MIN. QFE PRESSURE IN HPA 850.6 847.7 844.3 844.1 846.8 844.1 846.4 847.2 850.4 851.4 856.2 852.0 844.1 DAY 9 21 29 6 11 10 14 3 22 10 15 10 MEAN QNH PRESSURE IN HPA 1023.6 1021.6 1019.8 1018.9 1019.9 1018.1 1016.1 1018.6 1021.7 1025.9 1028.0 1024.8 1021.4 MAX. QNH PRESSURE IN HPA 1030.8 1029.1 1027.4 1024.5 1026.1 1024.3 1020.5 1023.9 1028.6 1031.9 1035.9 1030.1 1035.9 DAY 20 1 4 20 17 2 31 26 26 27 23 2 MIN. QNH PRESSURE IN HPA 1017.7 1014.4 1010.4 1010.2 1013.3 1010.2 1012.9 1013.8 1017.5 1018.6 1024.2 1019.3 1010.2 DAY 9 21 29 6 11 10 14 3 22 10 15 10 MEAN QFF PRESSURE IN HPA 1023.9 1018.4 1014.6 1011.2 1009.0 1005.8 1002.5 1006.9 1012.6 1019.2 1026.3 1024.6 1014.6 MAX. QFF PRESSURE IN HPA 1035.9 1030.2 1027.9 1017.5 1016.3 1012.9 1008.3 1013.7 1023.9 1025.4 1035.2 1034.6 1035.9 DAY 20 11 4 20 17 2 30 13 26 27 24 1 MIN. QFF PRESSURE IN HPA 1013.2 1005.1 1000.7 999.7 1000.4 995.6 999.1 1000.8 1007.0 1009.0 1018.8 1015.8 995.6 DAY 9 21 29 6 11 10 14 3 17 10 10 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 856.0 854.5 853.0 852.3 853.1 851.6 849.7 852.1 854.8 858.3 860.1 857.3 854.4 MAX. QFE PRESSURE IN HPA 862.1 861.6 860.1 857.2 858.0 856.7 853.7 857.4 861.1 864.0 866.4 862.8 866.4 DAY 19 11 4 20 17 2 31 26 25 27 23 1 MIN. QFE PRESSURE IN HPA 850.1 849.2 846.3 845.9 848.6 845.4 847.2 848.2 851.4 852.0 856.9 851.9 845.4 DAY 9 8 29 6 11 10 13 2 22 10 12 25 MEAN QNH PRESSURE IN HPA 1024.0 1022.3 1020.5 1019.7 1020.7 1018.9 1016.6 1019.5 1022.6 1026.6 1028.7 1025.5 1022.1 MAX. QNH PRESSURE IN HPA 1031.0 1030.4 1028.7 1025.4 1026.3 1024.8 1021.3 1025.6 1029.9 1033.2 1036.0 1031.8 1036.0 DAY 19 11 4 20 17 2 31 26 25 27 23 1 MIN. QNH PRESSURE IN HPA 1017.1 1016.1 1012.7 1012.3 1015.4 1011.7 1013.8 1014.9 1018.6 1019.3 1025.0 1019.2 1011.7 DAY 9 8 29 6 11 10 13 2 22 10 12 25 MEAN QFF PRESSURE IN HPA 1025.9 1020.8 1016.8 1013.5 1010.6 1007.0 1003.6 1008.5 1014.9 1021.6 1029.0 1026.9 1016.6 MAX. QFF PRESSURE IN HPA 1037.2 1033.4 1030.6 1020.4 1016.9 1013.9 1010.1 1014.5 1026.0 1027.9 1037.6 1037.9 1037.9 DAY 20 11 4 19 17 2 31 27 25 27 24 1 MIN. QFF PRESSURE IN HPA 1014.7 1008.2 1004.3 1003.9 1002.8 997.4 999.8 1002.6 1008.3 1011.1 1020.8 1018.6 997.4 DAY 9 21 29 6 11 10 17 3 18 10 3 25 ======================================================================================================================= 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 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 857.4 855.4 854.1 853.2 853.4 851.6 849.4 852.1 855.0 858.8 860.9 858.4 855.0 MAX. QFE PRESSURE IN HPA 863.7 863.1 860.2 858.5 858.9 857.1 853.6 857.2 861.2 864.5 866.7 863.9 866.7 DAY 19 11 3 19 17 2 31 25 25 27 23 1 MIN. QFE PRESSURE IN HPA 850.8 850.4 845.8 847.5 848.8 845.5 847.2 847.9 851.6 852.2 857.7 852.1 845.5 DAY 9 21 29 5 11 10 14 2 17 10 1 25 MEAN QNH PRESSURE IN HPA 1025.6 1023.3 1021.8 1020.7 1021.0 1018.8 1016.4 1019.4 1022.8 1027.2 1029.7 1026.7 1022.8 MAX. QNH PRESSURE IN HPA 1032.9 1032.2 1028.8 1026.9 1027.3 1025.2 1021.2 1025.4 1030.0 1033.8 1036.3 1033.1 1036.3 DAY 19 11 3 19 17 2 31 25 25 27 23 1 MIN. QNH PRESSURE IN HPA 1018.0 1017.5 1012.2 1014.1 1015.6 1011.8 1013.8 1014.6 1018.9 1019.6 1025.9 1019.5 1011.8 DAY 9 21 29 5 11 10 14 2 17 10 1 25 MEAN QFF PRESSURE IN HPA 1026.5 1020.6 1016.5 1012.8 1009.6 1006.1 1002.8 1007.4 1013.4 1019.5 1027.4 1026.7 1015.8 MAX. QFF PRESSURE IN HPA 1036.3 1033.5 1028.1 1020.3 1017.0 1013.2 1008.7 1013.5 1025.1 1026.2 1036.5 1037.2 1037.2 DAY 19 11 4 19 17 2 31 27 25 27 24 1 MIN. QFF PRESSURE IN HPA 1014.6 1009.8 1003.7 1004.3 1003.1 996.6 999.4 1001.6 1007.1 1009.9 1019.7 1018.2 996.6 DAY 9 21 29 5 11 10 17 3 17 10 3 25 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.5 853.8 852.8 852.2 852.4 850.6 848.5 850.8 853.5 857.2 859.1 856.4 853.6 MAX. QFE PRESSURE IN HPA 862.1 861.4 859.5 857.5 857.0 856.0 852.5 855.7 860.2 862.9 865.0 861.5 865.0 DAY 19 11 3 19 17 2 31 26 25 27 23 1 MIN. QFE PRESSURE IN HPA 849.1 848.2 845.1 846.3 847.1 844.3 846.1 847.2 850.1 851.1 855.9 851.7 844.3 DAY 9 18 29 5 11 10 14 3 17 10 1 25 MEAN QNH PRESSURE IN HPA 1023.4 1021.4 1020.3 1019.5 1019.8 1017.8 1015.3 1017.9 1021.1 1025.4 1027.5 1024.5 1021.2 MAX. QNH PRESSURE IN HPA 1031.0 1030.2 1028.0 1025.7 1025.1 1024.0 1019.9 1023.6 1028.8 1031.9 1034.4 1030.3 1034.4 DAY 19 11 3 19 17 2 31 26 25 27 23 1 MIN. QNH PRESSURE IN HPA 1016.0 1014.9 1011.4 1012.7 1013.7 1010.4 1012.5 1013.8 1017.1 1018.3 1023.9 1019.0 1010.4 DAY 9 18 29 5 11 10 14 3 17 10 1 25 MEAN QFF PRESSURE IN HPA 1022.6 1016.8 1014.0 1011.1 1008.1 1004.6 1001.4 1005.4 1011.0 1017.0 1024.6 1023.2 1013.3 MAX. QFF PRESSURE IN HPA 1033.6 1029.9 1023.4 1018.1 1014.6 1012.0 1006.6 1011.3 1023.1 1024.1 1032.5 1033.3 1033.6 DAY 19 11 4 22 14 2 31 27 25 27 24 1 MIN. QFF PRESSURE IN HPA 1011.9 1005.7 1001.0 1003.1 1000.9 994.6 997.5 999.5 1004.1 1007.1 1016.4 1016.1 994.6 DAY 9 21 28 5 11 10 14 3 5 10 3 25 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 854.8 852.6 851.4 850.7 851.0 849.6 847.6 849.8 852.5 856.4 858.3 855.7 852.5 MAX. QFE PRESSURE IN HPA 861.5 860.4 858.2 856.2 855.5 854.3 851.7 855.0 859.7 862.3 863.6 860.7 863.6 DAY 19 11 3 23 17 2 31 26 25 27 23 1 MIN. QFE PRESSURE IN HPA 849.0 846.1 843.1 844.0 845.1 843.5 844.7 845.9 848.3 850.6 855.3 851.2 843.1 DAY 27 18 28 5 11 10 14 2 17 10 3 25 MEAN QNH PRESSURE IN HPA 1022.5 1020.1 1018.6 1017.8 1018.2 1016.6 1014.2 1016.8 1019.9 1024.4 1026.6 1023.7 1020.0 MAX. QNH PRESSURE IN HPA 1030.3 1029.1 1026.5 1024.2 1023.4 1022.0 1019.0 1022.8 1028.2 1031.3 1032.8 1029.4 1032.8 DAY 19 11 3 23 17 2 31 26 25 27 23 1 MIN. QNH PRESSURE IN HPA 1015.9 1012.5 1009.0 1010.1 1011.4 1009.5 1010.9 1012.3 1015.1 1017.7 1023.2 1018.4 1009.0 DAY 27 18 28 5 11 10 14 2 17 10 3 25 MEAN QFF PRESSURE IN HPA 1022.8 1016.8 1013.5 1010.0 1007.2 1004.3 1000.8 1005.1 1010.9 1017.6 1025.0 1023.4 1013.1 MAX. QFF PRESSURE IN HPA 1034.2 1029.7 1026.1 1017.0 1013.4 1011.0 1007.0 1011.2 1023.6 1024.8 1032.1 1033.5 1034.2 DAY 19 11 3 23 14 1 31 12 25 27 24 1 MIN. QFF PRESSURE IN HPA 1014.6 1006.0 999.1 1000.0 999.3 994.7 996.8 998.7 1003.5 1008.0 1016.6 1017.2 994.7 DAY 8 18 28 5 11 10 14 3 17 10 3 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 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 855.8 853.4 852.2 851.2 851.4 849.9 848.1 850.4 853.4 857.1 859.4 856.6 853.2 MAX. QFE PRESSURE IN HPA 861.8 861.3 859.3 856.8 855.6 854.8 852.2 855.7 860.8 863.1 864.8 861.7 864.8 DAY 19 11 3 19 17 22 31 26 25 27 23 1 MIN. QFE PRESSURE IN HPA 849.7 848.2 843.6 843.9 847.6 844.7 844.9 846.3 848.8 851.6 856.6 852.5 843.6 DAY 29 18 28 5 10 10 14 2 17 9 1 9 MEAN QNH PRESSURE IN HPA 1023.8 1020.9 1019.6 1018.4 1018.7 1016.9 1014.9 1017.5 1021.0 1025.3 1027.9 1024.7 1020.8 MAX. QNH PRESSURE IN HPA 1030.7 1030.1 1027.8 1024.9 1023.5 1022.6 1019.6 1023.6 1029.5 1032.2 1034.1 1030.6 1034.1 DAY 19 11 3 19 17 22 31 26 25 27 23 1 MIN. QNH PRESSURE IN HPA 1016.7 1014.9 1009.6 1010.0 1014.3 1010.9 1011.1 1012.7 1015.6 1018.9 1024.7 1019.9 1009.6 DAY 29 18 28 5 10 10 14 2 17 9 1 9 MEAN QFF PRESSURE IN HPA 1025.5 1019.3 1015.8 1012.0 1008.6 1005.0 1002.0 1006.5 1013.4 1020.1 1028.1 1025.9 1015.2 MAX. QFF PRESSURE IN HPA 1035.8 1032.5 1028.9 1019.0 1014.5 1011.3 1008.3 1012.4 1026.8 1026.8 1036.3 1036.1 1036.3 DAY 19 11 3 19 13 2 31 26 25 27 23 1 MIN. QFF PRESSURE IN HPA 1016.2 1008.9 1000.7 1001.8 1002.4 996.6 997.7 1000.4 1005.6 1010.7 1019.8 1018.7 996.6 DAY 29 21 28 5 26 10 14 2 17 11 9 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 856.7 854.0 853.2 852.4 852.9 851.0 849.6 852.0 854.8 858.1 860.0 857.2 854.3 MAX. QFE PRESSURE IN HPA 861.9 862.3 860.2 857.5 857.1 856.2 853.1 857.1 861.4 863.2 866.2 862.1 866.2 DAY 19 11 3 19 16 1 29 25 25 27 22 1 MIN. QFE PRESSURE IN HPA 850.1 848.5 842.4 845.0 848.8 844.4 847.1 848.1 850.7 852.6 857.0 852.7 842.4 DAY 29 20 28 5 10 29 13 2 17 9 14 9 MEAN QNH PRESSURE IN HPA 1024.7 1021.7 1020.7 1019.8 1020.4 1018.2 1016.6 1019.3 1022.5 1026.4 1028.6 1025.4 1022.0 MAX. QNH PRESSURE IN HPA 1030.8 1031.3 1028.8 1025.7 1025.2 1024.2 1020.6 1025.2 1030.2 1032.3 1035.8 1031.0 1035.8 DAY 19 11 3 19 16 1 29 25 25 27 22 1 MIN. QNH PRESSURE IN HPA 1017.1 1015.3 1008.2 1011.2 1015.6 1010.6 1013.7 1014.8 1017.8 1020.0 1025.1 1020.2 1008.2 DAY 29 20 28 5 10 29 13 2 17 9 14 9 MEAN QFF PRESSURE IN HPA 1025.7 1018.8 1015.5 1011.9 1009.0 1005.4 1002.9 1007.3 1013.2 1018.7 1026.6 1025.2 1015.0 MAX. QFF PRESSURE IN HPA 1035.5 1032.4 1027.9 1018.9 1014.8 1012.5 1008.4 1013.0 1025.4 1025.1 1035.2 1034.5 1035.5 DAY 19 11 3 19 14 1 29 26 25 27 23 1 MIN. QFF PRESSURE IN HPA 1015.6 1007.8 997.8 1000.4 1001.8 996.3 999.4 1001.9 1005.7 1009.1 1018.1 1017.2 996.3 DAY 29 20 28 5 10 10 14 2 17 11 9 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 856.0 853.9 852.7 851.9 852.9 850.9 849.6 851.6 854.3 857.8 859.8 856.7 854.0 MAX. QFE PRESSURE IN HPA 861.9 861.6 859.8 856.5 857.7 856.2 853.4 856.2 861.0 863.1 866.6 861.5 866.6 DAY 19 11 3 19 16 1 30 24 25 26 22 1 MIN. QFE PRESSURE IN HPA 849.6 848.2 843.8 842.9 848.8 844.5 847.3 848.1 851.2 852.0 856.3 851.8 842.9 DAY 29 20 28 5 10 9 8 2 11 9 14 9 MEAN QNH PRESSURE IN HPA 1024.0 1021.6 1020.1 1019.2 1020.4 1018.0 1016.6 1018.9 1022.0 1026.1 1028.4 1024.8 1021.7 MAX. QNH PRESSURE IN HPA 1030.8 1030.4 1028.4 1024.5 1025.9 1024.2 1021.0 1024.2 1029.8 1032.2 1036.2 1030.3 1036.2 DAY 19 11 3 19 16 1 30 24 25 26 22 1 MIN. QNH PRESSURE IN HPA 1016.6 1014.9 1009.9 1008.8 1015.6 1010.7 1013.9 1014.8 1018.4 1019.3 1024.3 1019.1 1008.8 DAY 29 20 28 5 10 9 8 2 11 9 14 9 MEAN QFF PRESSURE IN HPA 1023.1 1017.3 1013.9 1010.9 1008.7 1004.9 1002.6 1006.4 1011.8 1018.0 1025.7 1023.5 1013.9 MAX. QFF PRESSURE IN HPA 1034.8 1029.9 1028.1 1017.9 1015.3 1012.1 1008.3 1011.5 1024.2 1024.4 1033.9 1033.1 1034.8 DAY 19 10 3 22 16 1 29 26 25 27 22 1 MIN. QFF PRESSURE IN HPA 1012.0 1005.5 998.5 997.6 1001.9 995.7 999.1 1001.0 1006.1 1008.6 1017.8 1014.7 995.7 DAY 29 20 28 5 10 9 14 21 17 9 9 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 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.1 10.1 11.9 18.7 21.1 28.7 28.4 26.5 23.4 19.4 10.6 5.2 17.6 MINIMUN AIR TEMPERATURE (C) 0.3 3.5 4.7 12.1 14.8 19.6 20.5 18.5 14.0 11.2 4.8 -0.1 10.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 7 16 8 1 0 0 0 34 DAYS WITH MINIMUM TEMP. <=-4 6 2 2 0 0 0 0 0 0 0 0 5 15 DAYS WITH FREEZING MIN.<= 0 18 6 7 0 0 0 0 0 0 0 2 21 54 TEMPERATURE RECORDS LOWEST(C) -6.0 -5.0 -5.0 6.0 8.0 16.0 15.0 12.0 8.0 6.0 0.0 -10.0 -10.0 DAY 7 10 9 3 15 15 23 31 15 13 19 29 MAXIMUM AIR TEMPERATURE (C) 16.3 17.9 19.5 26.5 28.3 37.0 35.8 34.7 33.1 29.1 17.9 12.1 25.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 5 13 30 31 31 26 15 0 0 151 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 25.0 27.0 27.0 31.0 37.0 41.0 42.0 40.0 37.0 33.0 26.0 19.0 42.0 DAY 28 28 26 9 29 12 17 3 6 1 2 3 DIF. BETWEEN (MAX.-MIN.) (C) 16.0 14.4 14.8 14.4 13.5 17.4 15.3 16.2 19.1 17.9 13.1 12.2 15.4 MEAN DAILY TEMP. (MDT) (C) 8.3 10.7 12.1 19.3 21.5 28.3 28.2 26.6 23.5 20.1 11.4 6.0 18.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 12.0 60.5 218.0 223.0 174.5 81.0 17.0 0.0 0.0 786.0 HEATING DEG. DAYS(BASE 18 0C) 300.5 205.0 183.5 16.5 10.5 0.0 0.0 0.0 0.0 6.5 201.0 372.0 1295.5 DEWPOINT (MEAN C) -5.0 -1.4 -3.3 3.3 4.6 1.9 4.0 0.7 -1.3 -0.3 -0.2 -3.5 -0.1 MIXING RATIO (G/KG) 3.18 4.19 3.85 5.86 6.53 5.35 6.13 4.87 4.27 4.50 4.55 3.60 4.74 VAPOUR PRESSURE (HPA) 4.35 5.72 5.23 7.94 8.82 7.25 8.27 6.61 5.82 6.16 6.22 4.92 6.44 SATURATION DEF. (HPA) 6.68 7.55 9.86 14.84 18.02 34.03 32.08 29.71 25.00 18.02 7.36 4.61 17.31 RELATIVE HUMIDITY (MEAN %) 44 49 40 40 40 20 23 20 21 28 50 57 36 RELATIVE HUMIDITY (MAX. %) 61 68 60 60 60 33 34 28 31 39 71 74 52 RELATIVE HUMIDITY (MIN. %) 28 30 24 22 23 11 14 12 13 18 32 39 22 RELATIVE HUMIDITY (MEAN% 03UTC) 57 63 55 55 48 28 29 26 28 37 63 65 46 RELATIVE HUMIDITY (MEAN% 09UTC) 30 32 27 25 30 12 14 13 13 18 35 42 24 RELATIVE HUMIDITY (MEAN% 15UTC) 44 43 35 31 33 14 19 17 19 27 49 58 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.0 22.8 19.0 25.0 58.8 0.0 0.0 0.0 0.0 0.0 25.0 19.1 169.7 DAYS WITH PRECIPITATION >=10 0 0 1 1 2 0 0 0 0 0 1 0 5 DAYS WITH PRECIPITATION >= 5 0 2 1 2 3 0 0 0 0 0 3 2 13 DAYS WITH PRECIPITATION >= 1 0 6 5 4 9 0 0 0 0 0 3 6 33 DAYS WITH PRECIPITATION 3 10 6 13 10 1 0 0 1 0 6 8 58 GREATEST DAILY PRECIPITATION 0.0 9.0 11.0 13.0 25.0 0.0 0.0 0.0 0.0 0.0 11.0 7.0 25.0 DAY ** 2 29 26 12 ** ** ** ** ** 13 28 DAY WITH THUNDER STORM 0 2 1 4 5 0 0 0 2 0 2 1 17 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 5 5 DAYS WITH DUST 0 1 11 5 11 13 16 8 5 0 2 3 75 WIND DIRECTION (PREVAILING) 45 45 45 45 45 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 5.4 5.1 5.1 6.7 5.5 5.8 8.2 7.3 5.3 4.8 4.5 6.2 6.1 PREVAILING WIND PERCENT 19.8 32.6 17.7 27.2 25.4 31.4 50.2 48.8 40.6 30.0 26.8 29.0 31.6 CALMS PERCENT OF WIND 53.2 34.8 31.0 12.6 19.0 22.2 10.1 9.7 15.1 23.9 31.0 41.5 25.3 NO. OF WIND OBSERVATION 248 224 248 239 248 239 247 248 239 247 239 248 2914 VECTOR WIND DIRECTION (MEAN) 19 13 249 50 74 42 43 43 33 32 25 40 38 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.2 0.4 1.2 0.6 2.6 5.9 5.4 3.2 1.5 1.3 1.7 2.1 WIND STEADINESES (MEAN %) 41.7 36.4 9.3 22.6 12.2 59.1 86.8 87.1 72.7 42.9 40.6 48.6 47.7 WIND SPEED (MEAN KNOTS) 2.4 3.3 4.3 5.3 4.9 4.4 6.8 6.2 4.4 3.5 3.2 3.5 4.4 FASTEST WIND DIRECTION 30 270 210 240 80 50 30 20 60 30 140 80 210 FASTEST WIND SPEED (KNOTS) 15 15 25 15 23 18 22 20 15 12 18 22 25 DAY 24 3 5 22 10 17 20 16 9 5 11 25 DAYS WITH SKY CLEAR (0-2)/8 20 7 13 5 9 27 30 30 28 22 15 20 226 DAYS WITH P.CLOUDY (3-6)/8 9 12 10 17 15 3 1 1 2 9 11 6 96 DAYS WITH CLOUDY (7-8)/8 2 9 8 8 7 0 0 0 0 0 4 5 43 DAYS WITH VISIBILITY =< 2 KM 1 0 3 0 0 1 4 0 0 0 2 4 15 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 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.6 855.3 851.3 851.6 850.1 850.2 848.7 849.7 853.9 857.0 857.0 856.1 853.1 MAX. QFE PRESSURE IN HPA 860.7 862.3 859.0 858.6 855.0 856.7 852.5 853.1 861.5 861.2 861.6 863.0 863.0 DAY-HOUR 28- 6 4-21 23- 6 2- 6 8- 6 2- 6 29- 6 4-21 24- 6 12- 6 6- 6 21- 6 MIN. QFE PRESSURE IN HPA 852.3 847.5 845.1 843.3 843.2 844.2 845.2 845.2 847.2 853.0 851.7 843.2 843.2 DAY-HOUR 4-12 13-12 13-12 16-12 11-15 17-12 5-12 27- 9 3-12 2-12 25-12 11-12 MEAN QNH PRESSURE IN HPA 1024.7 1023.1 1018.5 1018.9 1017.1 1017.3 1015.5 1016.7 1021.6 1025.1 1025.1 1024.1 1020.6 MAX. QNH PRESSURE IN HPA 1029.4 1031.3 1027.4 1027.0 1022.8 1024.8 1019.9 1020.6 1030.3 1030.0 1030.4 1032.1 1032.1 DAY-HOUR 28- 6 4-21 23- 6 2- 6 8- 6 2- 6 29- 6 4-21 24- 6 12- 6 6- 6 21- 6 MIN. QNH PRESSURE IN HPA 1019.7 1014.1 1011.4 1009.3 1009.2 1010.3 1011.5 1011.5 1013.8 1020.5 1019.0 1009.2 1009.2 DAY-HOUR 4-12 13-12 13-12 16-12 11-15 17-12 5-12 27- 9 3-12 2-12 25-12 11-12 MEAN QFF PRESSURE IN HPA 1023.7 1020.1 1014.2 1010.3 1007.1 1003.1 1001.4 1003.8 1010.5 1016.4 1021.7 1024.2 1013.0 MAX. QFF PRESSURE IN HPA 1031.0 1032.7 1025.9 1020.8 1015.4 1012.3 1006.6 1008.8 1020.2 1025.0 1028.1 1036.3 1036.3 DAY-HOUR 9- 3 5- 3 23- 3 2- 3 15- 3 2- 3 24- 3 26- 3 25- 3 12- 3 19- 3 29- 6 MIN. QFF PRESSURE IN HPA 1014.1 1010.6 1003.4 1001.1 997.4 995.2 995.9 996.2 1000.8 1009.5 1014.7 1006.1 995.2 DAY-HOUR 31- 9 12-12 5-21 15-12 30-21 17-12 7- 6 3-12 9-21 2-12 12-12 11-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 856.6 855.0 851.0 851.4 849.9 850.3 848.7 849.7 853.8 856.9 856.8 856.0 853.0 MAX. QFE PRESSURE IN HPA 860.6 862.2 856.2 856.7 853.4 855.4 851.8 852.3 860.3 859.4 859.8 861.4 862.2 DAY 28 5 24 8 20 2 29 5 25 12 6 21 MIN. QFE PRESSURE IN HPA 853.7 849.4 846.1 844.4 844.0 846.0 846.2 846.7 847.8 854.5 851.9 849.4 844.0 DAY 5 14 6 16 11 19 1 3 10 31 13 11 MEAN QNH PRESSURE IN HPA 1024.7 1022.8 1018.2 1018.6 1016.9 1017.3 1015.5 1016.7 1021.4 1025.0 1024.9 1024.0 1020.5 MAX. QNH PRESSURE IN HPA 1029.3 1031.1 1024.2 1024.8 1021.0 1023.3 1019.1 1019.7 1028.9 1027.9 1028.4 1030.2 1031.1 DAY 28 5 24 8 20 2 29 5 25 12 6 21 MIN. QNH PRESSURE IN HPA 1021.3 1016.3 1012.5 1010.6 1010.1 1012.4 1012.6 1013.2 1014.5 1022.2 1019.2 1016.3 1010.1 DAY 5 14 6 16 11 19 1 3 10 31 13 11 MEAN QFF PRESSURE IN HPA 1023.6 1019.6 1013.7 1010.2 1007.1 1003.4 1001.4 1003.7 1010.6 1016.4 1021.4 1023.8 1012.9 MAX. QFF PRESSURE IN HPA 1028.1 1031.4 1022.7 1018.2 1014.3 1010.7 1004.9 1007.2 1017.9 1021.8 1025.7 1033.9 1033.9 DAY 9 5 15 3 14 2 29 26 25 12 19 29 MIN. QFF PRESSURE IN HPA 1016.1 1012.7 1005.3 1001.7 998.3 997.6 997.3 998.5 1001.5 1011.3 1015.3 1014.2 997.3 DAY 30 26 6 16 11 18 6 3 10 2 12 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.1 855.8 851.7 852.2 850.7 851.2 849.5 850.5 854.6 857.7 857.5 856.6 853.8 MAX. QFE PRESSURE IN HPA 860.5 862.1 857.9 857.3 854.4 856.4 852.2 852.9 860.5 860.6 860.6 862.2 862.2 DAY 28 5 23 8 20 2 29 5 24 12 6 21 MIN. QFE PRESSURE IN HPA 854.6 850.3 847.4 844.3 844.8 846.6 847.4 847.8 849.8 855.4 853.0 848.5 844.3 DAY 31 14 13 16 11 17 1 12 10 27 13 11 MEAN QNH PRESSURE IN HPA 1025.3 1023.7 1019.0 1019.6 1017.9 1018.5 1016.5 1017.7 1022.4 1026.0 1025.7 1024.7 1021.4 MAX. QNH PRESSURE IN HPA 1029.2 1031.0 1026.2 1025.5 1022.1 1024.4 1019.6 1020.4 1029.2 1029.3 1029.3 1031.1 1031.1 DAY 28 5 23 8 20 2 29 5 24 12 6 21 MIN. QNH PRESSURE IN HPA 1022.4 1017.4 1014.0 1010.4 1011.0 1013.1 1014.0 1014.5 1016.8 1023.3 1020.5 1015.3 1010.4 DAY 31 14 13 16 11 17 1 12 10 27 13 11 MEAN QFF PRESSURE IN HPA 1025.9 1022.0 1016.2 1012.1 1008.5 1004.9 1003.0 1005.7 1012.9 1019.1 1023.7 1026.1 1015.0 MAX. QFF PRESSURE IN HPA 1031.0 1032.7 1025.9 1020.8 1015.4 1012.3 1006.6 1008.8 1020.2 1025.0 1028.1 1035.5 1035.5 DAY 9 5 23 2 15 2 24 26 25 12 19 29 MIN. QFF PRESSURE IN HPA 1019.3 1015.4 1009.1 1004.0 1000.8 998.9 999.4 1000.3 1005.2 1014.7 1015.1 1014.5 998.9 DAY 30 14 6 16 11 17 6 3 10 2 12 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 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.1 856.5 852.6 852.9 851.1 851.2 849.3 850.5 855.0 858.4 858.1 857.5 854.3 MAX. QFE PRESSURE IN HPA 860.7 862.3 859.0 858.6 855.0 856.7 852.5 852.6 861.5 861.2 861.6 863.0 863.0 DAY 28 5 23 2 8 2 29 5 24 12 6 21 MIN. QFE PRESSURE IN HPA 854.6 851.1 847.5 845.6 844.7 846.8 845.2 847.4 850.2 855.8 853.9 848.4 844.7 DAY 5 14 13 16 11 17 7 12 9 27 11 11 MEAN QNH PRESSURE IN HPA 1026.4 1024.6 1020.0 1020.4 1018.3 1018.4 1016.2 1017.6 1022.9 1026.7 1026.4 1025.8 1022.0 MAX. QNH PRESSURE IN HPA 1029.4 1031.3 1027.4 1027.0 1022.8 1024.8 1019.9 1020.0 1030.3 1030.0 1030.4 1032.1 1032.1 DAY 28 5 23 2 8 2 29 5 24 12 6 21 MIN. QNH PRESSURE IN HPA 1022.4 1018.3 1014.1 1011.9 1010.9 1013.3 1011.5 1014.0 1017.3 1023.7 1021.5 1015.2 1010.9 DAY 5 14 13 16 11 17 7 12 9 27 11 11 MEAN QFF PRESSURE IN HPA 1025.7 1021.7 1015.4 1011.5 1007.8 1003.7 1001.9 1004.5 1011.1 1017.4 1022.7 1026.2 1014.1 MAX. QFF PRESSURE IN HPA 1030.9 1032.0 1024.4 1020.4 1014.2 1010.5 1005.8 1007.8 1018.8 1022.6 1027.0 1036.3 1036.3 DAY 9 5 23 2 15 2 29 26 25 12 27 29 MIN. QFF PRESSURE IN HPA 1018.8 1014.6 1007.9 1005.0 1000.1 997.9 995.9 1000.5 1004.1 1012.5 1016.1 1012.9 995.9 DAY 31 13 20 14 30 18 7 3 9 2 11 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 856.0 855.1 851.3 851.6 850.1 850.1 848.3 849.4 853.6 856.7 856.6 855.8 852.9 MAX. QFE PRESSURE IN HPA 859.0 860.6 858.0 857.1 854.0 855.5 851.3 852.4 860.3 859.7 860.0 861.4 861.4 DAY 27 5 23 2 20 2 29 5 24 12 6 21 MIN. QFE PRESSURE IN HPA 852.5 849.1 845.9 844.6 843.6 845.6 846.0 845.2 848.6 854.4 852.2 845.4 843.6 DAY 31 13 13 16 11 16 5 27 9 2 25 11 MEAN QNH PRESSURE IN HPA 1024.0 1022.9 1018.5 1018.9 1017.2 1017.2 1015.1 1016.3 1021.2 1024.8 1024.7 1023.7 1020.4 MAX. QNH PRESSURE IN HPA 1027.4 1029.3 1026.3 1025.2 1021.7 1023.4 1018.5 1019.8 1028.9 1028.2 1028.6 1030.2 1030.2 DAY 27 5 23 2 20 2 29 5 24 12 6 21 MIN. QNH PRESSURE IN HPA 1019.9 1016.0 1012.3 1010.8 1009.6 1011.9 1012.4 1011.5 1015.4 1022.1 1019.6 1011.7 1009.6 DAY 31 13 13 16 11 16 5 27 9 2 25 11 MEAN QFF PRESSURE IN HPA 1021.4 1018.8 1013.3 1009.5 1006.6 1002.7 1000.5 1002.6 1009.1 1014.7 1020.1 1022.9 1011.8 MAX. QFF PRESSURE IN HPA 1027.0 1028.2 1022.8 1018.0 1013.0 1009.4 1004.5 1005.9 1017.0 1020.9 1024.1 1032.9 1032.9 DAY 9 5 23 2 13 2 29 26 24 12 19 29 MIN. QFF PRESSURE IN HPA 1014.1 1011.4 1005.9 1002.5 999.0 996.9 996.1 998.4 1001.6 1009.9 1015.2 1008.4 996.1 DAY 31 13 20 15 11 17 5 3 9 2 4 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.4 854.1 850.0 850.2 849.1 848.9 847.5 848.5 852.5 855.6 855.9 854.9 851.9 MAX. QFE PRESSURE IN HPA 858.7 859.4 856.5 855.6 852.5 854.2 850.6 851.8 860.0 858.3 858.8 860.4 860.4 DAY 27 5 23 2 8 2 29 5 24 12 6 20 MIN. QFE PRESSURE IN HPA 852.3 847.5 845.1 843.3 844.2 844.2 845.2 845.7 847.2 853.0 851.7 843.2 843.2 DAY 4 13 13 16 11 17 5 3 3 2 25 11 MEAN QNH PRESSURE IN HPA 1023.2 1021.7 1017.0 1017.3 1016.0 1015.7 1014.1 1015.3 1019.9 1023.5 1023.9 1022.7 1019.2 MAX. QNH PRESSURE IN HPA 1027.1 1027.9 1024.5 1023.5 1019.9 1021.9 1017.7 1019.1 1028.6 1026.6 1027.2 1029.1 1029.1 DAY 27 5 23 2 8 2 29 5 24 12 6 20 MIN. QNH PRESSURE IN HPA 1019.7 1014.1 1011.4 1009.3 1010.3 1010.3 1011.5 1012.1 1013.8 1020.5 1019.0 1009.2 1009.2 DAY 4 13 13 16 11 17 5 3 3 2 25 11 MEAN QFF PRESSURE IN HPA 1021.8 1018.4 1012.6 1008.8 1006.2 1001.8 1000.0 1002.3 1009.0 1014.8 1020.4 1022.4 1011.5 MAX. QFF PRESSURE IN HPA 1027.1 1028.0 1022.4 1018.1 1012.7 1008.7 1004.0 1006.2 1017.6 1020.5 1025.2 1031.8 1031.8 DAY 9 8 23 2 15 2 29 5 24 12 19 29 MIN. QFF PRESSURE IN HPA 1014.6 1010.6 1006.0 1001.1 998.9 995.2 996.1 996.2 1001.6 1009.5 1014.7 1006.1 995.2 DAY 31 12 20 15 30 17 5 3 8 2 12 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 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.2 854.8 850.8 850.7 849.2 849.0 847.9 848.8 853.2 856.3 856.8 855.9 852.5 MAX. QFE PRESSURE IN HPA 859.7 859.9 856.6 855.8 852.6 854.3 850.8 851.5 860.6 858.7 859.1 861.4 861.4 DAY 27 4 23 2 16 2 29 5 24 12 6 21 MIN. QFE PRESSURE IN HPA 853.0 847.9 846.3 843.9 843.2 844.4 845.7 846.2 847.5 853.5 852.8 847.0 843.2 DAY 4 13 5 16 11 16 5 12 3 2 25 11 MEAN QNH PRESSURE IN HPA 1024.2 1022.6 1017.9 1017.9 1016.2 1015.9 1014.6 1015.7 1020.8 1024.3 1024.9 1023.8 1019.9 MAX. QNH PRESSURE IN HPA 1028.2 1028.5 1024.7 1023.7 1020.0 1022.0 1018.0 1018.8 1029.3 1027.1 1027.6 1030.2 1030.2 DAY 27 4 23 2 16 2 29 5 24 12 6 21 MIN. QNH PRESSURE IN HPA 1020.5 1014.6 1012.7 1010.0 1009.2 1010.6 1012.1 1012.6 1014.1 1021.1 1020.3 1013.6 1009.2 DAY 4 13 5 16 11 16 5 12 3 2 25 11 MEAN QFF PRESSURE IN HPA 1024.6 1020.8 1015.0 1010.4 1006.8 1002.4 1001.1 1003.7 1011.2 1017.4 1022.9 1025.2 1013.5 MAX. QFF PRESSURE IN HPA 1030.1 1029.5 1024.3 1019.5 1013.2 1009.9 1005.1 1007.3 1019.1 1022.7 1027.5 1034.2 1034.2 DAY 9 5 23 2 15 1 29 25 24 12 19 29 MIN. QFF PRESSURE IN HPA 1018.3 1012.1 1008.7 1003.4 999.4 996.4 997.1 998.0 1002.9 1011.7 1016.0 1013.2 996.4 DAY 29 12 5 16 30 17 5 3 8 2 12 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 857.0 855.6 851.6 852.0 850.5 850.6 849.3 850.4 854.5 857.2 857.4 856.2 853.5 MAX. QFE PRESSURE IN HPA 860.3 861.9 857.1 857.1 854.0 855.5 851.9 853.1 861.5 859.7 860.0 861.8 861.9 DAY 27 4 23 2 8 2 28 5 24 11 2 20 MIN. QFE PRESSURE IN HPA 853.3 849.1 845.5 846.6 843.8 845.9 847.1 846.8 848.7 854.8 853.1 848.1 843.8 DAY 4 13 5 15 11 30 5 2 9 25 12 11 MEAN QNH PRESSURE IN HPA 1025.1 1023.5 1018.9 1019.4 1017.6 1017.7 1016.2 1017.5 1022.3 1025.4 1025.6 1024.1 1021.1 MAX. QNH PRESSURE IN HPA 1028.9 1030.8 1025.2 1025.2 1021.7 1023.4 1019.2 1020.6 1030.3 1028.2 1028.6 1030.7 1030.8 DAY 27 4 23 2 8 2 28 5 24 11 2 20 MIN. QNH PRESSURE IN HPA 1020.8 1016.0 1011.8 1013.1 1009.9 1012.3 1013.7 1013.3 1015.5 1022.6 1020.6 1014.8 1009.9 DAY 4 13 5 15 11 30 5 2 9 25 12 11 MEAN QFF PRESSURE IN HPA 1024.3 1020.5 1014.2 1010.5 1007.1 1003.1 1001.8 1004.4 1010.6 1016.2 1022.0 1024.5 1013.3 MAX. QFF PRESSURE IN HPA 1028.4 1031.0 1023.0 1018.7 1014.7 1009.1 1004.8 1007.3 1018.4 1021.4 1026.1 1034.1 1034.1 DAY 8 4 14 2 14 1 29 5 24 12 19 28 MIN. QFF PRESSURE IN HPA 1017.1 1012.5 1004.1 1004.5 998.4 997.5 997.7 998.7 1002.2 1011.6 1015.1 1012.7 997.5 DAY 29 13 5 14 30 17 5 2 9 1 12 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 856.7 855.4 851.5 851.8 850.2 850.5 849.1 850.1 854.3 857.1 857.1 855.9 853.3 MAX. QFE PRESSURE IN HPA 860.5 862.3 857.3 857.0 853.6 855.7 851.8 853.1 861.4 859.6 860.0 861.5 862.3 DAY 27 4 23 7 8 1 28 4 24 11 2 20 MIN. QFE PRESSURE IN HPA 852.8 850.0 845.7 845.8 843.8 846.3 847.0 846.9 848.2 855.0 852.0 848.4 843.8 DAY 4 13 5 15 11 15 5 2 9 30 12 31 MEAN QNH PRESSURE IN HPA 1024.8 1023.3 1018.7 1019.1 1017.2 1017.6 1016.0 1017.2 1022.0 1025.2 1025.2 1023.8 1020.9 MAX. QNH PRESSURE IN HPA 1029.2 1031.3 1025.5 1025.1 1021.2 1023.6 1019.1 1020.6 1030.2 1028.1 1028.6 1030.3 1031.3 DAY 27 4 23 7 8 1 28 4 24 11 2 20 MIN. QNH PRESSURE IN HPA 1020.3 1017.0 1012.1 1012.2 1009.9 1012.7 1013.6 1013.4 1014.9 1022.8 1019.3 1015.2 1009.9 DAY 4 13 5 15 11 15 5 2 9 30 12 31 MEAN QFF PRESSURE IN HPA 1022.4 1019.1 1013.5 1009.7 1006.7 1003.0 1001.4 1003.5 1010.1 1015.3 1020.7 1023.0 1012.4 MAX. QFF PRESSURE IN HPA 1027.1 1030.4 1023.4 1017.3 1015.1 1009.9 1004.4 1007.4 1018.9 1021.1 1024.6 1034.7 1034.7 DAY 5 4 23 2 13 1 29 5 24 11 19 28 MIN. QFF PRESSURE IN HPA 1015.9 1012.2 1003.4 1002.6 997.4 997.2 997.1 998.0 1000.8 1010.8 1015.5 1011.9 997.1 DAY 30 12 5 15 30 17 5 2 9 1 12 31 ======================================================================================================================= 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 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.4 6.8 13.6 17.2 24.0 27.4 28.7 27.9 21.7 14.2 9.0 1.6 15.9 MINIMUN AIR TEMPERATURE (C) -6.1 1.4 7.7 10.6 15.2 18.0 21.3 18.8 12.8 4.5 1.6 -5.3 8.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 8 21 10 0 0 0 0 39 DAYS WITH MINIMUM TEMP. <=-4 23 3 0 0 0 0 0 0 0 0 2 21 49 DAYS WITH FREEZING MIN.<= 0 29 11 0 0 0 0 0 0 0 5 10 23 78 TEMPERATURE RECORDS LOWEST(C) -14.0 -5.0 1.0 5.0 9.0 13.0 16.0 14.0 6.0 -1.0 -9.0 -14.0 -14.0 DAY 21 1 3 2 3 6 26 23 26 17 30 10 MAXIMUM AIR TEMPERATURE (C) 4.8 13.7 21.0 24.7 32.6 35.7 36.5 37.3 31.4 25.1 18.6 9.5 24.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 27 30 31 31 23 6 0 0 152 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 12.0 21.0 29.0 32.0 37.0 42.0 40.0 42.0 37.0 35.0 25.0 16.0 42.0 DAY 18 26 27 30 17 28 1 3 10 4 22 24 DIF. BETWEEN (MAX.-MIN.) (C) 10.9 12.3 13.3 14.1 17.4 17.7 15.2 18.5 18.6 20.6 17.0 14.8 15.8 MEAN DAILY TEMP. (MDT) (C) -0.7 7.6 14.4 17.6 23.9 26.8 28.9 28.0 22.1 14.8 10.1 2.1 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 6.0 96.0 175.0 244.5 218.5 62.5 7.5 0.0 0.0 810.0 HEATING DEG. DAYS(BASE 18 0C) 578.5 303.0 122.5 37.5 0.0 0.0 0.0 0.0 6.0 125.5 237.0 493.0 1903.0 DEWPOINT (MEAN C) -8.4 -1.5 1.6 0.8 1.0 1.5 3.2 3.0 0.4 -4.4 -6.5 -10.8 -1.7 MIXING RATIO (G/KG) 2.51 4.16 5.19 5.02 4.94 5.11 5.76 5.66 4.72 3.41 2.87 2.20 4.29 VAPOUR PRESSURE (HPA) 3.43 5.66 7.05 6.80 6.71 6.92 7.78 7.64 6.42 4.66 3.94 3.02 5.84 SATURATION DEF. (HPA) 2.46 4.78 9.50 13.85 24.84 31.87 33.34 32.09 21.66 13.61 8.79 4.55 16.78 RELATIVE HUMIDITY (MEAN %) 61 59 49 37 24 20 21 22 26 30 35 42 36 RELATIVE HUMIDITY (MAX. %) 74 74 71 59 38 31 29 31 39 44 53 59 50 RELATIVE HUMIDITY (MIN. %) 45 41 30 20 14 12 13 13 16 16 21 24 22 RELATIVE HUMIDITY (MEAN% 03UTC) 67 71 64 52 32 27 26 29 36 42 46 55 46 RELATIVE HUMIDITY (MEAN% 09UTC) 48 44 32 23 15 13 13 13 16 18 24 26 24 RELATIVE HUMIDITY (MEAN% 15UTC) 63 55 44 32 20 17 18 18 25 26 33 38 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.0 85.5 39.5 26.6 2.0 0.0 0.0 1.0 0.0 0.0 0.0 4.0 190.6 DAYS WITH PRECIPITATION >=10 1 3 2 2 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 5 3 4 2 2 0 0 0 0 0 0 0 0 11 DAYS WITH PRECIPITATION >= 1 6 4 9 4 1 0 0 1 0 0 0 2 27 DAYS WITH PRECIPITATION 6 6 11 8 3 0 0 1 0 0 3 3 41 GREATEST DAILY PRECIPITATION 12.0 35.0 15.0 13.0 2.0 0.0 0.0 1.0 0.0 0.0 0.0 2.0 35.0 DAY 19 27 22 1 2 ** ** 1 ** ** ** 17 DAY WITH THUNDER STORM 1 1 4 5 1 0 0 0 0 0 0 0 12 DAYS WITH SNOW OR SLEET 5 0 0 0 0 0 0 0 0 0 1 0 6 DAYS WITH DUST 3 5 7 12 1 0 4 3 2 0 2 1 40 WIND DIRECTION (PREVAILING) 45 45 45 225 45 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 4.1 6.1 6.6 11.3 5.5 6.7 7.9 6.8 6.8 4.9 4.8 5.1 6.1 PREVAILING WIND PERCENT 25.8 26.7 20.2 20.8 21.0 33.3 44.4 31.9 25.4 20.6 20.4 25.4 25.7 CALMS PERCENT OF WIND 31.9 32.3 39.1 34.2 33.5 23.3 16.5 37.1 42.1 43.1 47.9 46.0 35.6 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 33 31 84 224 1 26 34 39 30 20 350 27 28 VECTOR WIND MAGNITUDE(KNOTS) 0.4 1.0 0.5 2.3 0.9 3.4 5.5 3.6 3.0 1.7 0.7 1.2 1.6 WIND STEADINESES (MEAN %) 12.1 26.3 11.4 39.0 23.7 69.4 87.3 85.7 83.3 58.6 25.0 48.0 40.0 WIND SPEED (MEAN KNOTS) 3.3 3.8 4.4 5.9 3.8 4.9 6.3 4.2 3.6 2.9 2.8 2.5 4.0 FASTEST WIND DIRECTION 80 190 310 220 240 360 60 50 30 50 190 50 220 FASTEST WIND SPEED (KNOTS) 25 20 25 30 20 16 25 18 18 12 20 24 30 DAY 18 11 22 18 20 2 23 6 16 22 27 24 DAYS WITH SKY CLEAR (0-2)/8 24 10 11 13 21 28 29 28 30 31 22 19 266 DAYS WITH P.CLOUDY (3-6)/8 4 13 12 10 9 2 2 3 0 0 7 5 67 DAYS WITH CLOUDY (7-8)/8 3 6 8 7 1 0 0 0 0 0 1 7 33 DAYS WITH VISIBILITY =< 2 KM 5 7 5 4 0 0 0 0 0 1 1 0 23 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 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 855.6 853.3 853.2 850.7 852.4 848.9 847.8 847.9 853.2 857.4 857.4 858.3 853.0 MAX. QFE PRESSURE IN HPA 864.0 860.0 858.7 859.3 857.4 857.1 852.7 852.7 860.1 861.4 863.5 864.2 864.2 DAY-HOUR 30-18 1- 6 18- 6 24-18 10- 6 2- 6 22- 6 26- 3 29- 6 17- 6 30- 6 4- 6 MIN. QFE PRESSURE IN HPA 835.4 846.0 846.9 838.9 846.7 840.7 842.6 842.0 848.2 850.8 843.5 850.6 835.4 DAY-HOUR 19-12 16- 0 4-12 9-15 12-15 29-15 30-15 2-12 2-12 4-12 27-18 17-18 MEAN QNH PRESSURE IN HPA 1023.5 1020.9 1020.8 1017.8 1019.8 1015.8 1014.5 1014.6 1020.7 1025.6 1025.6 1026.6 1020.5 MAX. QNH PRESSURE IN HPA 1033.2 1028.6 1027.1 1027.8 1025.6 1025.2 1020.2 1020.2 1028.7 1030.2 1032.6 1033.4 1033.4 DAY-HOUR 30-18 1- 6 18- 6 24-18 10- 6 2- 6 22- 6 26- 3 29- 6 17- 6 30- 6 4- 6 MIN. QNH PRESSURE IN HPA 1000.1 1012.4 1013.4 1004.2 1013.2 1006.3 1008.5 1007.8 1014.9 1018.0 1009.5 1017.7 1000.1 DAY-HOUR 19-12 16- 0 4-12 9-15 12-15 29-15 30-15 2-12 2-12 4-12 27-18 17-18 MEAN QFF PRESSURE IN HPA 1028.1 1019.8 1015.4 1010.2 1008.4 1002.4 1000.2 1000.8 1010.6 1020.1 1023.3 1029.4 1014.1 MAX. QFF PRESSURE IN HPA 1040.9 1033.0 1024.1 1023.2 1015.3 1014.1 1006.2 1009.2 1021.1 1029.0 1038.9 1040.2 1040.9 DAY-HOUR 21-15 1- 3 24- 3 25- 3 10- 3 3- 3 22- 3 26- 3 29- 3 17- 3 30- 3 10-15 MIN. QFF PRESSURE IN HPA 998.5 1010.5 1007.0 993.0 1000.8 990.0 993.2 991.8 1002.2 1006.2 1003.8 1014.5 990.0 DAY-HOUR 19- 9 15-21 28-12 8-21 12-12 29-15 31-12 2-12 2-12 4- 9 26-12 17-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 855.3 853.1 852.9 850.2 852.2 849.1 847.9 848.0 853.2 857.2 857.2 858.3 852.9 MAX. QFE PRESSURE IN HPA 861.8 859.5 857.0 858.4 855.7 856.0 851.5 851.7 859.0 860.3 862.0 862.8 862.8 DAY 31 1 24 25 10 3 22 26 29 21 2 4 MIN. QFE PRESSURE IN HPA 843.6 846.0 847.6 840.6 847.8 842.8 844.4 844.2 849.7 852.1 844.0 851.4 840.6 DAY 19 16 4 9 13 29 31 3 9 4 28 18 MEAN QNH PRESSURE IN HPA 1023.1 1020.6 1020.4 1017.2 1019.6 1016.0 1014.6 1014.7 1020.8 1025.3 1025.4 1026.6 1020.4 MAX. QNH PRESSURE IN HPA 1030.7 1028.0 1025.1 1026.7 1023.6 1024.0 1018.8 1019.0 1027.4 1028.9 1030.9 1031.8 1031.8 DAY 31 1 24 25 10 3 22 26 29 21 2 4 MIN. QNH PRESSURE IN HPA 1009.6 1012.4 1014.3 1006.2 1014.5 1008.7 1010.6 1010.3 1016.7 1019.5 1010.1 1018.6 1006.2 DAY 19 16 4 9 13 29 31 3 9 4 28 18 MEAN QFF PRESSURE IN HPA 1027.4 1019.3 1014.8 1009.7 1008.4 1002.8 1000.3 1000.8 1010.7 1020.1 1022.9 1029.1 1013.9 MAX. QFF PRESSURE IN HPA 1038.5 1031.5 1022.6 1021.3 1012.7 1012.7 1004.8 1006.5 1019.2 1026.1 1036.6 1037.2 1038.5 DAY 22 1 24 25 10 3 17 26 29 16 30 4 MIN. QFF PRESSURE IN HPA 1007.9 1010.8 1007.3 996.1 1002.9 992.3 994.6 994.4 1003.9 1009.6 1005.8 1016.6 992.3 DAY 19 16 29 9 13 29 31 3 11 4 28 18 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 855.7 853.6 853.6 851.2 853.1 850.0 848.6 848.7 853.8 857.9 857.9 858.8 853.6 MAX. QFE PRESSURE IN HPA 862.0 859.2 857.3 858.8 857.2 856.9 852.6 852.7 859.4 860.8 862.7 863.6 863.6 DAY 31 1 24 25 10 2 22 26 29 17 2 4 MIN. QFE PRESSURE IN HPA 842.9 847.3 848.3 842.6 849.0 843.4 845.6 845.0 850.4 852.7 846.7 853.4 842.6 DAY 19 16 4 9 12 29 31 2 3 5 28 25 MEAN QNH PRESSURE IN HPA 1023.7 1021.2 1021.1 1018.4 1020.6 1017.1 1015.4 1015.5 1021.4 1026.2 1026.2 1027.2 1021.2 MAX. QNH PRESSURE IN HPA 1030.9 1027.7 1025.5 1027.2 1025.4 1025.0 1020.0 1020.2 1027.9 1029.5 1031.7 1032.8 1032.8 DAY 31 1 24 25 10 2 22 26 29 17 2 4 MIN. QNH PRESSURE IN HPA 1008.8 1013.9 1015.1 1008.5 1015.9 1009.4 1011.9 1011.2 1017.5 1020.2 1013.2 1021.0 1008.5 DAY 19 16 4 9 12 29 31 2 3 5 28 25 MEAN QFF PRESSURE IN HPA 1029.5 1021.5 1017.1 1011.9 1010.1 1004.4 1002.0 1002.8 1013.0 1022.8 1025.9 1031.7 1016.1 MAX. QFF PRESSURE IN HPA 1039.6 1033.0 1024.1 1023.2 1015.3 1014.1 1006.2 1009.2 1021.1 1029.0 1038.9 1040.0 1040.0 DAY 31 1 24 25 10 3 22 26 29 17 30 4 MIN. QFF PRESSURE IN HPA 1007.4 1013.6 1008.9 999.7 1004.5 993.3 996.9 997.5 1006.3 1011.7 1008.8 1019.9 993.3 DAY 19 16 29 9 12 29 12 1 2 6 26 25 ======================================================================================================================= 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 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 856.9 854.6 854.5 852.0 853.5 850.1 848.5 848.7 854.2 858.5 858.7 859.7 854.2 MAX. QFE PRESSURE IN HPA 862.3 860.0 858.7 859.1 857.4 857.1 852.7 852.6 860.1 861.4 863.5 864.2 864.2 DAY 31 1 18 25 10 2 22 26 29 17 30 4 MIN. QFE PRESSURE IN HPA 841.2 849.2 849.0 843.7 849.0 843.1 845.5 845.0 850.7 853.1 847.5 854.3 841.2 DAY 19 16 4 9 12 29 31 2 3 4 26 24 MEAN QNH PRESSURE IN HPA 1025.0 1022.3 1022.2 1019.3 1021.1 1017.1 1015.3 1015.6 1021.9 1026.9 1027.1 1028.2 1021.8 MAX. QNH PRESSURE IN HPA 1031.3 1028.6 1027.1 1027.6 1025.6 1025.2 1020.2 1020.0 1028.7 1030.2 1032.6 1033.4 1033.4 DAY 31 1 18 25 10 2 22 26 29 17 30 4 MIN. QNH PRESSURE IN HPA 1006.8 1016.1 1015.9 1009.7 1015.9 1009.0 1011.8 1011.2 1017.8 1020.6 1014.1 1022.0 1006.8 DAY 19 16 4 9 12 29 31 2 3 4 26 24 MEAN QFF PRESSURE IN HPA 1029.7 1021.5 1016.8 1011.4 1009.0 1003.3 1000.8 1001.3 1011.1 1020.4 1024.2 1030.9 1015.0 MAX. QFF PRESSURE IN HPA 1038.8 1031.0 1023.3 1021.5 1013.7 1013.3 1005.8 1007.6 1018.3 1027.2 1036.6 1038.6 1038.8 DAY 21 1 18 25 10 3 22 26 29 17 30 10 MIN. QFF PRESSURE IN HPA 1005.0 1015.2 1009.7 999.1 1002.4 992.0 996.2 996.1 1005.3 1008.7 1008.2 1020.8 992.0 DAY 19 11 29 9 12 29 10 2 9 4 26 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.3 853.3 853.3 851.0 852.6 849.0 847.5 847.4 852.7 857.0 857.1 857.9 852.8 MAX. QFE PRESSURE IN HPA 861.8 858.6 857.9 857.4 856.8 856.0 851.4 850.8 858.3 859.8 861.5 862.6 862.6 DAY 30 28 18 25 10 2 22 31 29 17 2 4 MIN. QFE PRESSURE IN HPA 835.8 848.8 848.0 842.9 848.0 841.9 844.5 843.6 849.5 851.4 845.3 852.4 835.8 DAY 19 13 4 9 12 29 31 2 3 4 26 24 MEAN QNH PRESSURE IN HPA 1023.1 1020.8 1020.9 1018.2 1020.0 1015.8 1014.2 1014.0 1020.2 1025.1 1025.2 1026.1 1020.3 MAX. QNH PRESSURE IN HPA 1030.7 1027.0 1026.2 1025.6 1024.9 1024.0 1018.6 1018.0 1026.6 1028.4 1030.3 1031.6 1031.6 DAY 30 28 18 25 10 2 22 31 29 17 2 4 MIN. QNH PRESSURE IN HPA 1000.6 1015.6 1014.7 1008.8 1014.7 1007.7 1010.7 1009.6 1016.4 1018.6 1011.6 1019.8 1000.6 DAY 19 13 4 9 12 29 31 2 3 4 26 24 MEAN QFF PRESSURE IN HPA 1026.6 1018.7 1014.5 1009.8 1008.0 1001.9 999.2 999.3 1008.9 1018.2 1021.6 1027.7 1012.9 MAX. QFF PRESSURE IN HPA 1037.1 1028.8 1022.5 1018.9 1013.4 1012.2 1003.7 1004.4 1016.5 1023.7 1033.5 1035.8 1037.1 DAY 21 1 18 25 10 2 22 26 29 17 30 10 MIN. QFF PRESSURE IN HPA 998.5 1013.5 1007.9 997.9 1001.0 990.6 994.2 993.6 1002.7 1006.2 1005.6 1017.1 990.6 DAY 19 11 29 9 12 29 31 2 1 4 26 24 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 854.6 852.2 852.1 849.8 851.3 847.7 846.6 846.4 851.8 856.2 856.3 857.2 851.9 MAX. QFE PRESSURE IN HPA 861.8 857.6 856.9 856.6 855.5 855.0 850.4 850.3 857.1 859.0 861.0 861.6 861.8 DAY 30 1 18 24 10 2 21 31 29 16 1 4 MIN. QFE PRESSURE IN HPA 835.4 848.7 846.9 840.4 846.9 841.0 843.0 842.0 848.2 850.8 844.1 851.7 835.4 DAY 19 13 4 9 12 29 31 2 2 4 26 24 MEAN QNH PRESSURE IN HPA 1022.3 1019.6 1019.4 1016.8 1018.5 1014.4 1013.1 1012.9 1019.2 1024.2 1024.3 1025.4 1019.2 MAX. QNH PRESSURE IN HPA 1030.7 1025.8 1025.0 1024.7 1023.4 1022.8 1017.5 1017.4 1025.2 1027.4 1029.8 1030.4 1030.7 DAY 30 1 18 24 10 2 21 31 29 16 1 4 MIN. QNH PRESSURE IN HPA 1000.1 1015.5 1013.4 1005.9 1013.4 1006.6 1008.9 1007.8 1014.9 1018.0 1010.2 1019.0 1000.1 DAY 19 13 4 9 12 29 31 2 2 4 26 24 MEAN QFF PRESSURE IN HPA 1026.6 1018.2 1013.8 1009.2 1007.3 1001.1 998.7 999.0 1009.0 1018.9 1021.8 1027.8 1012.6 MAX. QFF PRESSURE IN HPA 1037.9 1028.2 1021.7 1018.6 1012.7 1011.4 1003.8 1004.7 1016.3 1024.7 1034.9 1035.6 1037.9 DAY 21 1 18 24 10 2 21 31 28 16 30 3 MIN. QFF PRESSURE IN HPA 999.2 1012.7 1007.0 996.2 1000.8 990.1 993.2 991.8 1002.2 1007.6 1003.8 1016.9 990.1 DAY 19 26 28 9 12 29 31 2 2 4 26 24 ======================================================================================================================= 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 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 855.3 853.0 852.7 849.9 851.4 847.7 846.8 847.1 852.6 857.0 857.1 858.0 852.4 MAX. QFE PRESSURE IN HPA 862.9 858.1 857.8 857.2 855.6 855.7 850.5 850.9 857.5 860.0 862.2 862.5 862.9 DAY 30 1 18 24 10 2 21 31 29 16 1 4 MIN. QFE PRESSURE IN HPA 835.5 848.8 848.2 838.9 846.7 840.7 842.6 843.2 848.8 851.4 844.1 852.4 835.5 DAY 19 13 4 9 12 29 30 2 2 3 27 24 MEAN QNH PRESSURE IN HPA 1023.2 1020.5 1020.2 1016.9 1018.6 1014.4 1013.3 1013.6 1020.0 1025.1 1025.3 1026.3 1019.8 MAX. QNH PRESSURE IN HPA 1031.9 1026.4 1026.1 1025.4 1023.5 1023.6 1017.6 1018.1 1025.7 1028.6 1031.1 1031.5 1031.9 DAY 30 1 18 24 10 2 21 31 29 16 1 4 MIN. QNH PRESSURE IN HPA 1000.3 1015.6 1014.9 1004.2 1013.2 1006.3 1008.5 1009.2 1015.6 1018.6 1010.2 1019.8 1000.3 DAY 19 13 4 9 12 29 30 2 2 3 27 24 MEAN QFF PRESSURE IN HPA 1028.9 1020.6 1016.1 1010.4 1008.0 1001.5 999.7 1001.0 1011.4 1021.8 1025.0 1030.8 1014.6 MAX. QFF PRESSURE IN HPA 1040.9 1030.7 1024.0 1020.9 1013.4 1012.4 1004.6 1007.4 1019.3 1027.9 1037.9 1040.2 1040.9 DAY 21 1 18 24 10 2 16 31 25 16 30 10 MIN. QFF PRESSURE IN HPA 999.0 1015.5 1007.3 995.8 1001.9 990.0 994.0 994.5 1004.3 1010.5 1007.8 1018.3 990.0 DAY 19 26 28 9 12 29 31 2 2 6 26 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 856.2 853.7 853.7 850.9 852.9 849.1 848.3 848.7 853.8 857.9 857.6 858.4 853.5 MAX. QFE PRESSURE IN HPA 864.0 858.3 858.6 859.3 856.6 856.6 852.0 852.7 859.0 861.0 862.8 862.8 864.0 DAY 30 1 18 24 10 2 21 31 28 31 1 4 MIN. QFE PRESSURE IN HPA 842.0 849.2 849.0 839.0 848.7 842.8 844.6 845.1 850.1 852.3 843.5 850.6 839.0 DAY 19 15 3 9 12 28 31 2 10 3 27 17 MEAN QNH PRESSURE IN HPA 1024.2 1021.3 1021.3 1018.1 1020.4 1016.0 1015.1 1015.5 1021.4 1026.2 1025.9 1026.8 1021.0 MAX. QNH PRESSURE IN HPA 1033.2 1026.6 1027.0 1027.8 1024.7 1024.7 1019.3 1020.2 1027.4 1029.8 1031.8 1031.8 1033.2 DAY 30 1 18 24 10 2 21 31 28 31 1 4 MIN. QNH PRESSURE IN HPA 1007.8 1016.1 1015.9 1004.3 1015.5 1008.7 1010.8 1011.4 1017.1 1019.7 1009.5 1017.7 1004.3 DAY 19 15 3 9 12 28 31 2 10 3 27 17 MEAN QFF PRESSURE IN HPA 1028.9 1020.4 1015.9 1010.2 1008.4 1002.1 1000.6 1001.4 1010.8 1019.9 1023.2 1029.4 1014.3 MAX. QFF PRESSURE IN HPA 1039.6 1029.0 1023.1 1021.4 1012.7 1012.9 1004.7 1006.8 1017.3 1026.1 1036.3 1037.6 1039.6 DAY 21 1 18 24 10 2 16 31 28 28 30 10 MIN. QFF PRESSURE IN HPA 1008.5 1014.5 1008.7 993.8 1001.8 992.0 995.4 995.5 1003.1 1008.3 1005.6 1014.5 992.0 DAY 19 15 28 9 12 29 31 2 10 3 27 17 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 855.9 853.2 853.3 850.5 852.6 849.0 848.2 848.6 853.7 857.7 857.5 858.2 853.2 MAX. QFE PRESSURE IN HPA 863.4 857.5 857.5 858.9 856.4 856.6 852.0 852.0 859.0 861.0 862.6 863.0 863.4 DAY 30 1 23 24 10 2 21 31 28 31 1 3 MIN. QFE PRESSURE IN HPA 845.4 846.4 848.6 839.1 848.4 842.9 844.4 844.4 850.0 852.2 843.5 851.2 839.1 DAY 18 15 3 8 12 28 31 2 8 3 27 17 MEAN QNH PRESSURE IN HPA 1023.9 1020.8 1020.9 1017.7 1020.1 1015.9 1014.9 1015.4 1021.3 1026.0 1025.7 1026.5 1020.7 MAX. QNH PRESSURE IN HPA 1032.5 1025.7 1025.7 1027.3 1024.4 1024.7 1019.3 1019.3 1027.4 1029.8 1031.6 1032.1 1032.5 DAY 30 1 23 24 10 2 21 31 28 31 1 3 MIN. QNH PRESSURE IN HPA 1011.7 1012.9 1015.4 1004.4 1015.2 1008.8 1010.6 1010.6 1017.0 1019.6 1009.5 1018.4 1004.4 DAY 18 15 3 8 12 28 31 2 8 3 27 17 MEAN QFF PRESSURE IN HPA 1027.6 1018.6 1014.5 1009.2 1008.0 1001.9 1000.0 1000.8 1010.3 1019.3 1022.3 1028.0 1013.4 MAX. QFF PRESSURE IN HPA 1038.3 1027.6 1022.1 1020.6 1012.3 1013.0 1004.0 1005.4 1017.6 1025.3 1036.0 1036.7 1038.3 DAY 30 1 18 24 10 2 21 25 28 31 30 3 MIN. QFF PRESSURE IN HPA 1009.7 1010.5 1007.7 993.0 1002.1 991.8 994.8 994.2 1002.8 1007.1 1004.3 1014.7 991.8 DAY 18 15 31 8 12 28 31 2 10 3 27 17 ======================================================================================================================= 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 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.6 6.8 12.0 16.5 23.7 26.8 28.1 25.3 21.9 19.6 11.9 5.3 17.0 MINIMUN AIR TEMPERATURE (C) 1.5 1.2 4.7 8.7 14.2 17.5 20.5 17.1 12.2 11.4 5.0 -1.9 9.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 17 6 0 0 0 0 24 DAYS WITH MINIMUM TEMP. <=-4 5 2 1 0 0 0 0 0 0 0 0 6 14 DAYS WITH FREEZING MIN.<= 0 14 15 5 0 0 0 0 0 0 0 1 26 61 TEMPERATURE RECORDS LOWEST(C) -8.0 -5.0 -4.0 3.0 7.0 11.0 16.0 10.0 8.0 6.0 -1.0 -9.0 -9.0 DAY 7 18 18 1 7 5 20 25 25 27 14 24 MAXIMUM AIR TEMPERATURE (C) 10.7 13.6 20.2 25.1 33.0 35.7 36.1 33.7 31.9 29.4 21.1 14.4 25.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 25 30 31 29 29 18 0 0 166 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.0 20.0 28.0 34.0 40.0 41.0 40.0 37.0 35.0 32.0 29.0 20.0 41.0 DAY 14 9 12 30 19 19 4 3 4 8 8 16 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 12.4 15.5 16.4 18.8 18.2 15.6 16.6 19.7 18.0 16.1 16.3 16.1 MEAN DAILY TEMP. (MDT) (C) 6.1 7.4 12.4 16.9 23.6 26.6 28.3 25.4 22.1 20.4 13.1 6.2 17.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 5.0 98.0 167.5 226.0 136.0 39.5 15.0 0.0 0.0 687.0 HEATING DEG. DAYS(BASE 18 0C) 367.5 297.0 176.0 56.5 4.0 0.0 0.0 0.0 0.0 3.5 152.0 364.5 1421.0 DEWPOINT (MEAN C) -2.2 -4.1 -1.8 2.3 4.6 4.3 3.4 1.0 0.0 1.8 -1.0 -6.6 0.1 MIXING RATIO (G/KG) 4.15 3.47 4.11 5.53 6.42 6.23 5.84 4.99 4.60 5.20 4.33 2.84 4.81 VAPOUR PRESSURE (HPA) 5.65 4.73 5.60 7.50 8.71 8.44 7.89 6.77 6.27 7.10 5.93 3.89 6.54 SATURATION DEF. (HPA) 3.82 5.82 9.55 12.64 22.97 29.00 31.74 27.33 21.84 17.25 9.17 5.78 16.41 RELATIVE HUMIDITY (MEAN %) 60 50 41 41 31 25 22 22 25 32 45 46 37 RELATIVE HUMIDITY (MAX. %) 76 69 62 58 45 36 30 31 35 46 63 63 51 RELATIVE HUMIDITY (MIN. %) 44 34 26 26 19 15 13 13 15 20 29 29 24 RELATIVE HUMIDITY (MEAN% 03UTC) 70 63 56 53 39 33 28 28 31 42 56 58 46 RELATIVE HUMIDITY (MEAN% 09UTC) 47 36 29 29 21 15 13 14 16 21 30 30 25 RELATIVE HUMIDITY (MEAN% 15UTC) 58 44 36 37 27 21 20 19 24 31 42 44 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 80.6 32.6 5.8 4.3 0.0 0.0 0.0 0.0 0.0 9.0 9.0 8.0 149.3 DAYS WITH PRECIPITATION >=10 3 2 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 6 3 0 0 0 0 0 0 0 1 0 1 11 DAYS WITH PRECIPITATION >= 1 14 4 4 2 0 0 0 0 0 2 3 1 30 DAYS WITH PRECIPITATION 14 6 7 6 2 0 0 0 0 2 3 2 42 GREATEST DAILY PRECIPITATION 20.0 13.0 2.0 3.0 0.0 0.0 0.0 0.0 0.0 8.0 4.0 8.0 20.0 DAY 21 2 24 21 ** ** ** ** ** 12 20 22 DAY WITH THUNDER STORM 4 2 2 5 1 0 0 0 0 2 2 0 18 DAYS WITH SNOW OR SLEET 4 0 1 0 0 0 0 0 0 0 0 2 7 DAYS WITH DUST 2 5 5 4 1 1 8 6 0 0 0 1 33 WIND DIRECTION (PREVAILING) 45 45 225 45 45 45 45 45 45 45 45 360 45 PREVAILING WIND SPEED(KNOTS) 7.6 5.1 7.4 6.7 6.4 7.8 8.9 8.6 5.8 4.8 4.3 5.9 7.2 PREVAILING WIND PERCENT 27.4 18.8 25.0 19.2 31.0 45.4 57.3 54.8 32.5 12.9 17.9 17.4 28.9 CALMS PERCENT OF WIND 46.0 47.3 35.1 35.0 26.6 23.3 12.1 21.0 37.1 42.7 41.3 46.6 34.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 247 2919 VECTOR WIND DIRECTION (MEAN) 61 278 273 307 23 25 34 34 20 309 351 10 21 VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.7 0.8 0.7 2.5 4.9 7.0 5.8 3.1 1.1 1.3 1.3 2.2 WIND STEADINESES (MEAN %) 34.2 21.9 18.6 14.3 55.6 87.5 92.1 93.5 88.6 33.3 44.8 46.4 50.0 WIND SPEED (MEAN KNOTS) 3.8 3.2 4.3 4.9 4.5 5.6 7.6 6.2 3.5 3.3 2.9 2.8 4.4 FASTEST WIND DIRECTION 160 50 210 230 360 50 30 30 30 210 310 20 160 FASTEST WIND SPEED (KNOTS) 30 25 23 30 16 20 25 25 15 15 12 15 30 DAY 11 22 28 2 20 30 22 8 3 25 2 28 DAYS WITH SKY CLEAR (0-2)/8 4 19 15 18 23 28 25 31 28 22 21 22 256 DAYS WITH P.CLOUDY (3-6)/8 19 5 15 9 7 2 6 0 2 9 7 8 89 DAYS WITH CLOUDY (7-8)/8 8 4 1 3 1 0 0 0 0 0 2 1 20 DAYS WITH VISIBILITY =< 2 KM 2 3 1 2 0 0 1 0 0 0 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 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 853.9 853.2 853.9 851.7 853.2 850.6 848.5 851.9 854.7 856.4 858.0 856.4 853.5 MAX. QFE PRESSURE IN HPA 860.4 860.5 860.3 857.8 861.0 857.3 851.8 856.0 860.1 862.2 863.0 862.5 863.0 DAY-HOUR 17- 6 26- 6 11- 6 25- 6 21- 6 3- 3 9- 6 9- 6 15- 6 5- 6 28- 6 4- 6 MIN. QFE PRESSURE IN HPA 843.6 844.0 846.0 843.0 848.2 844.7 843.6 848.0 849.3 846.4 851.6 846.8 843.0 DAY-HOUR 11- 3 9-18 23-12 21-12 12-12 24-15 11-15 1-12 22-12 25-12 9-21 20-12 MEAN QNH PRESSURE IN HPA 1021.5 1020.7 1021.6 1019.0 1020.7 1017.7 1015.3 1019.2 1022.4 1024.4 1026.3 1024.4 1021.1 MAX. QNH PRESSURE IN HPA 1029.1 1029.2 1028.9 1026.1 1029.8 1025.5 1019.1 1024.0 1028.7 1031.1 1032.1 1031.5 1032.1 DAY-HOUR 17- 6 26- 6 11- 6 25- 6 21- 6 3- 3 9- 6 9- 6 15- 6 5- 6 28- 6 4- 6 MIN. QNH PRESSURE IN HPA 1009.6 1010.1 1012.4 1008.9 1014.9 1010.9 1009.6 1014.7 1016.2 1012.9 1018.9 1013.3 1008.9 DAY-HOUR 11- 3 9-18 23-12 21-12 12-12 24-15 11-15 1-12 22-12 25-12 9-21 20-12 MEAN QFF PRESSURE IN HPA 1021.3 1019.7 1017.3 1011.8 1009.3 1004.5 1001.4 1007.0 1012.2 1015.5 1022.1 1024.6 1013.9 MAX. QFF PRESSURE IN HPA 1031.7 1030.8 1028.1 1020.7 1022.5 1013.8 1006.9 1013.7 1018.8 1024.3 1031.4 1033.6 1033.6 DAY-HOUR 17- 3 26- 3 18- 3 7- 3 21- 6 3- 3 3- 6 10- 3 15- 3 29- 3 28- 3 23- 3 MIN. QFF PRESSURE IN HPA 1006.1 1004.2 1004.9 1000.7 1001.7 997.0 995.1 1001.0 1004.9 1001.2 1010.0 1012.9 995.1 DAY-HOUR 11- 3 9-21 23-18 21-12 12-12 26-12 11-15 3-12 22-12 25-21 9-21 20-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 853.5 852.8 853.7 851.4 853.2 850.8 848.8 852.0 854.7 856.2 857.9 856.3 853.4 MAX. QFE PRESSURE IN HPA 859.6 859.0 858.8 856.4 859.4 857.0 851.0 854.9 858.6 860.0 861.4 860.7 861.4 DAY 17 26 11 25 21 3 9 9 15 4 28 4 MIN. QFE PRESSURE IN HPA 845.8 846.4 846.3 845.0 849.0 846.4 845.0 848.5 850.8 847.1 852.2 849.0 845.0 DAY 11 10 24 4 4 25 12 1 23 26 10 21 MEAN QNH PRESSURE IN HPA 1021.1 1020.3 1021.3 1018.6 1020.8 1017.9 1015.6 1019.3 1022.5 1024.2 1026.2 1024.3 1021.0 MAX. QNH PRESSURE IN HPA 1028.1 1027.4 1027.2 1024.4 1027.9 1025.1 1018.2 1022.7 1027.0 1028.6 1030.2 1029.4 1030.2 DAY 17 26 11 25 21 3 9 9 15 4 28 4 MIN. QNH PRESSURE IN HPA 1012.2 1012.9 1012.7 1011.2 1015.9 1012.9 1011.2 1015.3 1018.0 1013.7 1019.6 1015.9 1011.2 DAY 11 10 24 4 4 25 12 1 23 26 10 21 MEAN QFF PRESSURE IN HPA 1020.6 1019.2 1017.1 1011.8 1009.8 1005.2 1001.7 1007.2 1012.7 1015.5 1021.9 1024.2 1013.9 MAX. QFF PRESSURE IN HPA 1030.2 1027.8 1026.5 1018.8 1018.3 1013.0 1005.0 1011.9 1016.5 1021.2 1028.3 1031.4 1031.4 DAY 17 26 18 7 22 3 3 10 30 29 28 23 MIN. QFF PRESSURE IN HPA 1007.8 1007.6 1005.2 1001.4 1004.5 999.1 996.4 1001.4 1007.4 1003.6 1011.8 1014.6 996.4 DAY 11 10 24 4 30 18 12 1 23 26 10 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 854.0 853.5 854.5 852.4 853.9 851.6 849.4 852.6 855.5 856.9 858.5 856.7 854.1 MAX. QFE PRESSURE IN HPA 859.8 860.0 859.6 857.2 860.4 857.3 851.6 855.7 859.5 860.8 862.4 861.7 862.4 DAY 17 26 11 25 21 3 9 9 15 4 28 4 MIN. QFE PRESSURE IN HPA 843.6 847.7 847.4 846.0 849.8 846.9 846.0 849.4 852.2 848.4 853.4 850.8 843.6 DAY 11 23 24 21 3 25 12 1 23 26 10 21 MEAN QNH PRESSURE IN HPA 1021.7 1021.1 1022.3 1019.8 1021.6 1018.8 1016.3 1020.1 1023.4 1025.1 1026.8 1024.8 1021.8 MAX. QNH PRESSURE IN HPA 1028.4 1028.6 1028.1 1025.4 1029.1 1025.5 1018.9 1023.6 1028.0 1029.5 1031.4 1030.6 1031.4 DAY 17 26 11 25 21 3 9 9 15 4 28 4 MIN. QNH PRESSURE IN HPA 1009.6 1014.4 1014.0 1012.4 1016.8 1013.4 1012.4 1016.3 1019.6 1015.2 1021.0 1018.0 1009.6 DAY 11 23 24 21 3 25 12 1 23 26 10 21 MEAN QFF PRESSURE IN HPA 1022.5 1021.5 1019.7 1014.1 1011.2 1006.6 1003.1 1008.7 1014.5 1018.1 1024.3 1026.7 1015.9 MAX. QFF PRESSURE IN HPA 1031.7 1030.8 1028.1 1020.7 1020.3 1013.8 1006.6 1013.7 1018.8 1024.3 1031.4 1033.6 1033.6 DAY 17 26 18 7 21 3 2 10 15 29 28 23 MIN. QFF PRESSURE IN HPA 1006.1 1011.9 1008.2 1004.5 1005.7 1000.3 997.1 1003.5 1009.8 1007.9 1015.1 1018.2 997.1 DAY 11 23 24 4 12 18 12 1 22 26 10 21 ======================================================================================================================= 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 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 855.1 854.4 855.0 852.9 854.3 851.6 849.3 852.7 855.7 857.6 859.2 857.6 854.6 MAX. QFE PRESSURE IN HPA 860.4 860.5 860.3 857.8 861.0 857.0 851.8 856.0 860.1 862.2 863.0 862.5 863.0 DAY 17 26 11 25 21 3 9 9 15 5 28 4 MIN. QFE PRESSURE IN HPA 845.3 847.9 848.2 846.0 850.2 847.0 845.8 849.6 852.9 849.3 855.0 851.7 845.3 DAY 11 23 24 21 30 25 12 1 22 25 9 20 MEAN QNH PRESSURE IN HPA 1022.9 1022.1 1022.9 1020.4 1022.0 1018.9 1016.3 1020.1 1023.6 1025.9 1027.7 1025.8 1022.4 MAX. QNH PRESSURE IN HPA 1029.1 1029.2 1028.9 1026.1 1029.8 1025.1 1019.1 1024.0 1028.7 1031.1 1032.1 1031.5 1032.1 DAY 17 26 11 25 21 3 9 9 15 5 28 4 MIN. QNH PRESSURE IN HPA 1011.6 1014.6 1014.9 1012.4 1017.3 1013.6 1012.2 1016.6 1020.4 1016.2 1022.8 1019.0 1011.6 DAY 11 23 24 21 30 25 12 1 22 25 9 20 MEAN QFF PRESSURE IN HPA 1022.8 1021.1 1017.8 1012.7 1009.7 1005.1 1002.2 1007.6 1012.5 1016.2 1023.2 1025.9 1014.7 MAX. QFF PRESSURE IN HPA 1031.5 1028.4 1027.1 1019.4 1022.5 1012.9 1006.9 1013.1 1016.5 1021.9 1029.7 1032.6 1032.6 DAY 17 26 17 6 21 3 3 9 15 29 28 23 MIN. QFF PRESSURE IN HPA 1008.5 1010.0 1005.9 1005.0 1004.0 998.7 996.9 1003.2 1008.6 1006.4 1016.2 1018.6 996.9 DAY 11 23 24 21 12 18 12 1 22 26 10 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 853.6 853.2 853.8 851.7 853.1 850.7 848.3 851.5 854.2 856.0 857.5 855.9 853.3 MAX. QFE PRESSURE IN HPA 858.8 859.4 859.6 856.4 859.7 855.8 850.7 855.6 858.4 860.3 861.4 860.6 861.4 DAY 17 26 11 25 21 3 9 9 15 4 28 4 MIN. QFE PRESSURE IN HPA 845.2 846.2 847.3 844.7 849.5 846.2 845.2 848.8 851.2 847.8 853.0 848.3 844.7 DAY 11 23 23 21 12 25 12 1 22 25 9 20 MEAN QNH PRESSURE IN HPA 1021.2 1020.7 1021.4 1019.0 1020.7 1017.8 1015.1 1018.8 1021.9 1023.9 1025.7 1023.9 1020.8 MAX. QNH PRESSURE IN HPA 1027.2 1027.9 1028.1 1024.4 1028.2 1023.7 1017.8 1023.5 1026.7 1028.9 1030.2 1029.3 1030.2 DAY 17 26 11 25 21 3 9 9 15 4 28 4 MIN. QNH PRESSURE IN HPA 1011.5 1012.6 1013.9 1010.9 1016.4 1012.6 1011.5 1015.6 1018.4 1014.5 1020.5 1015.1 1010.9 DAY 11 23 23 21 12 25 12 1 22 25 9 20 MEAN QFF PRESSURE IN HPA 1020.1 1018.7 1016.2 1010.9 1008.4 1004.0 1000.5 1005.7 1010.6 1013.7 1020.3 1022.6 1012.6 MAX. QFF PRESSURE IN HPA 1028.4 1027.0 1024.9 1017.6 1019.5 1011.7 1004.7 1011.9 1016.4 1019.5 1026.6 1029.4 1029.4 DAY 17 26 17 6 21 4 9 9 30 4 28 23 MIN. QFF PRESSURE IN HPA 1007.7 1007.3 1006.3 1002.2 1002.3 997.7 996.4 1002.1 1006.0 1003.9 1013.2 1015.1 996.4 DAY 11 23 23 21 12 26 12 1 22 26 1 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 852.9 852.2 852.7 850.6 851.9 849.3 847.1 850.6 853.3 855.1 856.8 855.2 852.3 MAX. QFE PRESSURE IN HPA 858.7 857.6 857.6 855.0 858.6 855.2 849.7 854.2 857.3 859.2 860.2 859.5 860.2 DAY 16 26 1 25 21 3 15 9 15 4 28 4 MIN. QFE PRESSURE IN HPA 845.0 844.4 846.0 843.0 848.2 845.0 844.0 848.0 849.3 846.4 852.4 846.8 843.0 DAY 11 23 23 21 12 24 11 1 22 25 9 20 MEAN QNH PRESSURE IN HPA 1020.4 1019.5 1020.2 1017.7 1019.2 1016.3 1013.7 1017.7 1020.8 1023.0 1024.9 1023.1 1019.7 MAX. QNH PRESSURE IN HPA 1027.1 1025.8 1025.8 1022.8 1027.0 1023.0 1016.7 1021.9 1025.5 1027.7 1028.8 1028.0 1028.8 DAY 16 26 1 25 21 3 15 9 15 4 28 4 MIN. QNH PRESSURE IN HPA 1011.2 1010.6 1012.4 1008.9 1014.9 1011.2 1010.1 1014.7 1016.2 1012.9 1019.8 1013.3 1008.9 DAY 11 23 23 21 12 24 11 1 22 25 9 20 MEAN QFF PRESSURE IN HPA 1019.9 1018.3 1016.0 1010.6 1008.1 1003.3 999.8 1005.5 1011.0 1014.1 1020.6 1023.0 1012.5 MAX. QFF PRESSURE IN HPA 1028.8 1025.9 1025.1 1017.3 1019.3 1011.2 1004.1 1011.0 1016.0 1019.3 1026.6 1029.9 1029.9 DAY 16 26 17 6 21 3 2 9 30 4 28 23 MIN. QFF PRESSURE IN HPA 1007.8 1005.9 1005.2 1000.7 1001.7 997.0 995.5 1001.0 1004.9 1004.0 1012.8 1013.7 995.5 DAY 11 23 23 21 12 26 11 3 22 25 9 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 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 853.8 852.8 853.3 850.9 852.1 849.3 847.5 851.2 854.0 855.9 857.7 856.3 852.9 MAX. QFE PRESSURE IN HPA 859.4 858.0 858.0 855.0 858.5 855.2 850.1 854.4 857.3 860.0 860.8 860.2 860.8 DAY 16 1 11 24 21 2 9 9 15 14 28 4 MIN. QFE PRESSURE IN HPA 846.5 844.4 846.0 843.0 848.5 844.7 843.6 848.6 849.7 847.2 853.0 848.0 843.0 DAY 11 9 23 21 12 24 11 3 22 25 9 20 MEAN QNH PRESSURE IN HPA 1021.4 1020.3 1020.9 1018.0 1019.5 1016.2 1014.2 1018.4 1021.6 1023.8 1026.0 1024.3 1020.4 MAX. QNH PRESSURE IN HPA 1027.9 1026.3 1026.3 1022.8 1026.9 1023.0 1017.1 1022.1 1025.5 1028.6 1029.5 1028.8 1029.5 DAY 16 1 11 24 21 2 9 9 15 14 28 4 MIN. QNH PRESSURE IN HPA 1013.0 1010.6 1012.4 1008.9 1015.3 1010.9 1009.6 1015.4 1016.7 1013.8 1020.5 1014.7 1008.9 DAY 11 9 23 21 12 24 11 3 22 25 9 20 MEAN QFF PRESSURE IN HPA 1022.1 1020.5 1018.2 1012.1 1009.0 1003.8 1000.9 1006.9 1012.6 1016.7 1023.5 1026.1 1014.4 MAX. QFF PRESSURE IN HPA 1030.7 1027.9 1026.6 1018.8 1020.1 1011.9 1005.3 1012.0 1016.8 1022.4 1029.4 1032.5 1032.5 DAY 16 26 17 6 21 2 2 9 26 28 28 23 MIN. QFF PRESSURE IN HPA 1009.8 1006.8 1006.1 1002.4 1002.9 997.2 995.1 1002.6 1006.6 1005.9 1014.3 1016.2 995.1 DAY 11 23 23 21 12 18 11 3 22 25 9 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 854.3 853.4 854.3 852.0 853.5 850.8 849.0 852.5 855.2 856.7 858.4 856.9 853.9 MAX. QFE PRESSURE IN HPA 860.0 858.3 858.8 856.4 859.3 857.0 851.4 855.8 858.4 860.6 861.0 861.5 861.5 DAY 16 1 1 24 21 2 9 9 14 4 28 31 MIN. QFE PRESSURE IN HPA 847.7 844.0 847.0 845.0 849.8 847.0 845.0 850.0 851.3 847.2 852.9 848.7 844.0 DAY 11 9 23 21 2 18 11 1 22 25 9 20 MEAN QNH PRESSURE IN HPA 1022.0 1021.0 1022.0 1019.3 1021.1 1018.0 1015.8 1020.0 1023.0 1024.8 1026.7 1025.0 1021.6 MAX. QNH PRESSURE IN HPA 1028.6 1026.6 1027.2 1024.4 1027.8 1025.1 1018.6 1023.7 1026.7 1029.3 1029.8 1030.3 1030.3 DAY 16 1 1 24 21 2 9 9 14 4 28 31 MIN. QNH PRESSURE IN HPA 1014.4 1010.1 1013.6 1011.2 1016.8 1013.6 1011.2 1017.0 1018.5 1013.8 1020.4 1015.5 1010.1 DAY 11 9 23 21 2 18 11 1 22 25 9 20 MEAN QFF PRESSURE IN HPA 1021.8 1019.9 1017.0 1011.6 1009.0 1004.1 1001.7 1007.5 1012.1 1015.3 1022.4 1025.1 1014.0 MAX. QFF PRESSURE IN HPA 1030.9 1026.7 1026.5 1019.5 1020.8 1012.6 1005.7 1013.6 1015.8 1020.5 1027.8 1031.1 1031.1 DAY 16 1 17 6 21 2 2 9 26 28 13 31 MIN. QFF PRESSURE IN HPA 1011.4 1004.4 1004.9 1003.1 1002.5 997.5 996.4 1003.9 1006.5 1003.9 1012.7 1014.2 996.4 DAY 11 9 23 21 12 18 12 3 22 25 9 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 854.0 853.1 854.1 851.7 853.5 850.7 849.0 852.3 855.0 856.5 858.1 856.4 853.7 MAX. QFE PRESSURE IN HPA 860.0 858.8 858.8 856.6 859.1 857.2 851.4 855.1 858.8 860.7 861.0 860.8 861.0 DAY 16 25 10 24 21 2 8 8 14 4 13 3 MIN. QFE PRESSURE IN HPA 847.2 844.8 846.7 845.2 850.0 846.7 845.0 850.0 851.1 846.6 851.6 848.4 844.8 DAY 10 9 23 21 3 24 11 1 22 25 9 20 MEAN QNH PRESSURE IN HPA 1021.6 1020.6 1021.8 1019.0 1021.1 1017.9 1015.8 1019.7 1022.8 1024.6 1026.5 1024.4 1021.3 MAX. QNH PRESSURE IN HPA 1028.6 1027.2 1027.2 1024.7 1027.6 1025.4 1018.6 1022.9 1027.2 1029.4 1029.8 1029.5 1029.8 DAY 16 25 10 24 21 2 8 8 14 4 13 3 MIN. QNH PRESSURE IN HPA 1013.8 1011.0 1013.2 1011.5 1017.0 1013.2 1011.2 1017.0 1018.3 1013.1 1018.9 1015.2 1011.0 DAY 10 9 23 21 3 24 11 1 22 25 9 20 MEAN QFF PRESSURE IN HPA 1020.5 1018.7 1016.6 1010.9 1009.1 1004.0 1001.4 1006.8 1011.7 1014.5 1021.2 1023.2 1013.2 MAX. QFF PRESSURE IN HPA 1029.8 1026.1 1025.5 1018.5 1019.5 1013.0 1005.2 1012.3 1015.8 1019.6 1026.8 1031.0 1031.0 DAY 16 25 17 6 21 2 9 9 30 28 27 22 MIN. QFF PRESSURE IN HPA 1009.2 1004.2 1005.1 1002.6 1003.2 997.8 996.1 1002.8 1006.5 1001.2 1010.0 1012.9 996.1 DAY 10 9 23 3 12 18 12 3 22 25 9 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 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.8 8.6 11.4 16.5 23.5 28.2 27.7 25.8 22.7 16.7 8.1 5.8 16.9 MINIMUN AIR TEMPERATURE (C) 0.9 3.8 5.2 9.9 14.6 19.0 19.2 16.5 13.5 9.0 -0.8 -1.4 9.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 10 9 2 1 0 0 0 22 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 6 6 15 DAYS WITH FREEZING MIN.<= 0 18 6 7 0 0 0 0 0 0 0 16 23 70 TEMPERATURE RECORDS LOWEST(C) -4.0 -1.0 -2.0 2.0 8.0 13.0 14.0 12.0 7.0 3.0 -9.0 -10.0 -10.0 DAY 1 12 4 6 13 1 3 17 5 20 25 30 MAXIMUM AIR TEMPERATURE (C) 16.8 15.1 19.3 24.1 32.2 37.3 36.3 34.5 32.9 26.3 19.1 14.9 25.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 26 30 31 31 27 9 0 0 161 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 22.0 27.0 32.0 37.0 43.0 42.0 39.0 36.0 33.0 24.0 21.0 43.0 DAY 31 1 11 21 26 15 7 6 12 1 1 21 DIF. BETWEEN (MAX.-MIN.) (C) 15.9 11.3 14.1 14.2 17.6 18.3 17.1 18.0 19.4 17.3 19.9 16.3 16.6 MEAN DAILY TEMP. (MDT) (C) 8.9 9.5 12.2 17.0 23.4 28.1 27.8 25.5 23.2 17.7 9.1 6.8 17.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 13.5 88.0 214.5 209.5 139.5 71.5 11.0 0.0 0.0 747.5 HEATING DEG. DAYS(BASE 18 0C) 282.5 239.0 182.0 66.5 2.0 0.0 0.0 0.0 0.0 50.0 265.5 347.5 1435.0 DEWPOINT (MEAN C) -3.7 1.5 -1.7 1.9 0.7 5.3 3.3 5.0 1.5 1.7 -9.6 -7.4 -0.1 MIXING RATIO (G/KG) 3.54 5.08 4.08 5.37 4.85 7.04 5.89 6.62 5.22 5.30 2.30 2.68 4.83 VAPOUR PRESSURE (HPA) 4.85 6.91 5.56 7.29 6.60 9.48 7.94 8.95 7.10 7.23 3.17 3.67 6.56 SATURATION DEF. (HPA) 6.58 4.83 8.93 12.86 24.22 31.25 31.06 26.17 22.51 13.23 8.87 6.37 16.41 RELATIVE HUMIDITY (MEAN %) 47 64 44 42 24 25 22 28 26 39 30 40 36 RELATIVE HUMIDITY (MAX. %) 62 81 66 61 34 34 32 41 37 56 43 53 50 RELATIVE HUMIDITY (MIN. %) 31 45 25 25 15 16 14 17 17 25 17 26 23 RELATIVE HUMIDITY (MEAN% 03UTC) 59 78 58 52 29 30 28 36 33 50 40 50 45 RELATIVE HUMIDITY (MEAN% 09UTC) 33 49 29 28 16 17 14 18 17 27 19 28 25 RELATIVE HUMIDITY (MEAN% 15UTC) 44 58 40 40 21 23 20 24 24 36 28 39 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 9.2 44.6 13.0 46.3 0.0 0.0 0.0 0.0 0.0 9.5 0.0 1.0 123.6 DAYS WITH PRECIPITATION >=10 0 1 0 2 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 1 4 1 2 0 0 0 0 0 1 0 0 9 DAYS WITH PRECIPITATION >= 1 1 9 4 8 0 0 0 0 0 2 0 1 25 DAYS WITH PRECIPITATION 2 14 4 9 0 0 0 1 0 7 0 1 38 GREATEST DAILY PRECIPITATION 9.0 16.0 7.0 23.0 0.0 0.0 0.0 0.0 0.0 5.0 0.0 1.0 23.0 DAY 14 24 2 25 ** ** ** ** ** 27 ** 27 DAY WITH THUNDER STORM 0 1 0 4 0 0 0 0 0 1 0 0 6 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 8 0 0 1 3 0 2 0 0 2 16 WIND DIRECTION (PREVAILING) 45 45 360 360 360 360 360 360 360 360 360 360 360 PREVAILING WIND SPEED(KNOTS) 5.3 7.0 6.6 6.0 6.6 7.6 7.3 5.8 6.3 5.5 5.0 5.1 6.2 PREVAILING WIND PERCENT 25.0 25.9 19.8 35.4 46.8 52.1 70.2 52.6 54.0 37.7 41.3 43.1 39.7 CALMS PERCENT OF WIND 42.7 42.0 27.4 13.8 12.1 26.7 8.9 28.7 33.1 32.4 40.0 27.0 27.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 247 239 247 240 248 2917 VECTOR WIND DIRECTION (MEAN) 19 34 328 358 355 7 8 9 1 348 359 349 2 VECTOR WIND MAGNITUDE(KNOTS) 1.4 1.9 1.9 2.9 3.8 4.7 6.0 3.8 3.6 2.6 2.3 2.6 3.1 WIND STEADINESES (MEAN %) 48.3 48.7 39.6 58.0 67.9 87.0 93.8 88.4 87.8 66.7 76.7 65.0 70.5 WIND SPEED (MEAN KNOTS) 2.9 3.9 4.8 5.0 5.6 5.4 6.4 4.3 4.1 3.9 3.0 4.0 4.4 FASTEST WIND DIRECTION 20 90 230 250 30 360 360 30 20 230 40 310 230 FASTEST WIND SPEED (KNOTS) 14 20 32 13 13 18 20 13 18 12 12 20 32 DAY 13 9 20 23 10 8 12 9 1 1 12 3 DAYS WITH SKY CLEAR (0-2)/8 19 10 19 9 26 29 29 31 30 24 29 22 277 DAYS WITH P.CLOUDY (3-6)/8 11 12 7 16 5 1 2 0 0 7 1 6 68 DAYS WITH CLOUDY (7-8)/8 1 6 4 5 0 0 0 0 0 0 0 3 19 DAYS WITH VISIBILITY =< 2 KM 0 0 3 0 0 0 0 0 2 0 0 1 6 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 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 857.4 853.6 852.3 852.4 853.4 849.8 848.1 850.0 853.5 856.8 860.6 855.9 853.6 MAX. QFE PRESSURE IN HPA 864.0 861.0 858.9 859.9 856.9 857.0 854.6 854.0 857.8 862.7 866.2 864.6 866.2 DAY-HOUR 1- 6 26- 6 3- 6 26-18 21- 6 3- 6 11- 6 17- 3 21- 6 31- 6 23- 6 7- 6 MIN. QFE PRESSURE IN HPA 851.8 845.7 839.4 845.3 847.5 841.2 843.2 844.0 848.0 850.4 855.5 848.3 839.4 DAY-HOUR 27-12 10- 0 20-12 23-12 26-15 27-12 26-12 5-12 8-12 1-12 30-12 12-12 MEAN QNH PRESSURE IN HPA 1025.6 1021.2 1019.7 1019.8 1021.0 1016.8 1014.8 1017.0 1021.1 1024.8 1029.2 1023.8 1021.2 MAX. QNH PRESSURE IN HPA 1033.2 1029.8 1027.3 1028.5 1025.0 1025.1 1022.4 1021.7 1026.1 1031.7 1035.8 1033.9 1035.8 DAY-HOUR 1- 6 26- 6 3- 6 26-18 21- 6 3- 6 11- 6 17- 3 21- 6 31- 6 23- 6 7- 6 MIN. QNH PRESSURE IN HPA 1019.1 1012.1 1004.8 1011.6 1014.1 1006.8 1009.2 1010.1 1014.7 1017.5 1023.4 1015.1 1004.8 DAY-HOUR 27-12 10- 0 20-12 23-12 26-15 27-12 26-12 5-12 8-12 1-12 30-12 12-12 MEAN QFF PRESSURE IN HPA 1024.1 1018.8 1015.7 1012.6 1009.8 1002.7 1001.1 1004.2 1010.3 1017.7 1027.8 1023.6 1014.0 MAX. QFF PRESSURE IN HPA 1034.8 1030.0 1028.4 1026.2 1018.0 1013.0 1008.3 1011.9 1016.1 1028.3 1037.1 1035.7 1037.1 DAY-HOUR 1- 3 26- 3 3- 3 6- 3 11- 3 3- 3 11- 3 17- 3 21- 3 31- 3 23- 3 8- 3 MIN. QFF PRESSURE IN HPA 1015.5 1006.9 996.9 1000.1 1001.7 990.7 995.8 995.9 1003.4 1006.3 1021.2 1011.8 990.7 DAY-HOUR 31- 9 2-21 20-12 23-12 26-15 27-12 26-12 5-12 1-12 1-12 16- 9 12- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 857.4 853.2 851.9 852.1 853.6 850.2 848.3 850.0 853.5 856.6 860.4 855.6 853.6 MAX. QFE PRESSURE IN HPA 862.2 859.0 857.2 859.2 856.0 855.8 853.2 853.2 856.9 861.0 865.0 862.8 865.0 DAY 1 26 11 27 11 3 11 17 22 10 23 8 MIN. QFE PRESSURE IN HPA 852.9 845.7 840.6 846.2 849.8 843.8 845.0 846.3 850.0 852.0 856.8 849.7 840.6 DAY 14 10 20 24 27 27 26 5 9 2 16 12 MEAN QNH PRESSURE IN HPA 1025.6 1020.7 1019.2 1019.5 1021.1 1017.2 1015.1 1017.0 1021.1 1024.7 1029.1 1023.6 1021.2 MAX. QNH PRESSURE IN HPA 1031.1 1027.4 1025.4 1027.7 1024.0 1023.7 1020.7 1020.7 1025.0 1029.8 1034.4 1031.8 1034.4 DAY 1 26 11 27 11 3 11 17 22 10 23 8 MIN. QNH PRESSURE IN HPA 1020.4 1012.1 1006.2 1012.6 1016.8 1009.9 1011.2 1012.7 1017.0 1019.3 1024.9 1016.7 1006.2 DAY 14 10 20 24 27 27 26 5 9 2 16 12 MEAN QFF PRESSURE IN HPA 1023.9 1018.1 1015.2 1012.5 1010.6 1003.7 1001.7 1004.7 1010.6 1017.7 1027.5 1023.1 1014.1 MAX. QFF PRESSURE IN HPA 1031.7 1027.3 1025.9 1025.0 1018.0 1012.8 1006.5 1010.7 1014.8 1025.1 1033.6 1032.3 1033.6 DAY 1 26 3 6 11 3 4 17 5 31 26 30 MIN. QFF PRESSURE IN HPA 1016.4 1007.0 997.0 1001.4 1003.6 994.4 997.9 998.0 1004.4 1008.5 1022.4 1013.7 994.4 DAY 31 3 20 24 27 27 27 6 1 2 5 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.9 853.8 852.6 853.0 854.3 850.8 849.0 850.7 854.3 857.3 861.2 856.2 854.3 MAX. QFE PRESSURE IN HPA 863.2 860.0 858.0 859.7 856.7 856.8 854.3 854.0 857.0 862.1 865.5 863.8 865.5 DAY 1 26 3 27 21 3 11 17 21 31 23 7 MIN. QFE PRESSURE IN HPA 854.4 845.8 841.0 847.8 850.4 844.1 845.6 846.8 850.9 852.7 857.2 849.4 841.0 DAY 28 10 20 23 27 27 26 5 8 15 16 12 MEAN QNH PRESSURE IN HPA 1026.2 1021.4 1020.0 1020.5 1022.0 1018.0 1015.8 1017.9 1022.0 1025.5 1030.0 1024.2 1022.0 MAX. QNH PRESSURE IN HPA 1032.3 1028.6 1026.3 1028.2 1024.8 1024.9 1022.0 1021.7 1025.1 1031.0 1035.0 1033.0 1035.0 DAY 1 26 3 27 21 3 11 17 21 31 23 7 MIN. QNH PRESSURE IN HPA 1022.1 1012.2 1006.6 1014.5 1017.5 1010.2 1011.9 1013.3 1018.1 1020.2 1025.4 1016.3 1006.6 DAY 28 10 20 23 27 27 26 5 8 15 16 12 MEAN QFF PRESSURE IN HPA 1026.5 1020.2 1017.4 1014.3 1011.5 1004.5 1002.7 1006.0 1012.5 1020.0 1030.8 1025.8 1016.0 MAX. QFF PRESSURE IN HPA 1034.8 1030.0 1028.4 1026.2 1018.0 1013.0 1008.3 1011.9 1016.1 1028.3 1037.1 1035.7 1037.1 DAY 1 26 3 6 11 3 11 17 21 31 23 8 MIN. QFF PRESSURE IN HPA 1018.9 1009.8 999.2 1003.3 1004.9 994.9 999.0 1000.1 1006.4 1011.2 1025.6 1014.0 994.9 DAY 31 10 20 23 27 27 25 6 1 2 16 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 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.8 854.7 853.1 853.4 854.5 850.6 848.9 850.8 854.7 857.9 861.8 857.1 854.7 MAX. QFE PRESSURE IN HPA 864.0 861.0 858.9 859.4 856.9 857.0 854.6 854.0 857.8 862.7 866.2 864.6 866.2 DAY 1 26 3 27 21 3 11 17 21 31 23 7 MIN. QFE PRESSURE IN HPA 855.2 848.0 841.2 848.2 850.5 843.5 845.6 846.6 850.6 853.2 857.9 850.2 841.2 DAY 27 10 20 23 27 27 26 5 8 2 16 12 MEAN QNH PRESSURE IN HPA 1027.2 1022.5 1020.7 1021.0 1022.2 1017.7 1015.7 1018.0 1022.4 1026.2 1030.7 1025.3 1022.5 MAX. QNH PRESSURE IN HPA 1033.2 1029.8 1027.3 1027.9 1025.0 1025.1 1022.4 1021.7 1026.1 1031.7 1035.8 1033.9 1035.8 DAY 1 26 3 27 21 3 11 17 21 31 23 7 MIN. QNH PRESSURE IN HPA 1023.0 1014.7 1006.8 1014.9 1017.6 1009.5 1011.9 1013.1 1017.7 1020.7 1026.2 1017.3 1006.8 DAY 27 10 20 23 27 27 26 5 8 2 16 12 MEAN QFF PRESSURE IN HPA 1026.0 1020.3 1016.3 1013.6 1010.6 1003.2 1001.8 1004.9 1011.0 1018.5 1028.6 1025.1 1015.0 MAX. QFF PRESSURE IN HPA 1034.3 1029.4 1028.3 1025.0 1016.8 1011.9 1007.8 1009.7 1015.1 1027.2 1035.1 1034.2 1035.1 DAY 1 26 3 6 11 2 11 17 21 31 23 7 MIN. QFF PRESSURE IN HPA 1019.0 1012.3 999.3 1003.4 1004.5 993.3 997.7 998.9 1005.4 1009.1 1024.3 1015.2 993.3 DAY 31 10 20 23 26 27 26 5 1 2 16 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 857.2 853.6 852.2 852.4 853.3 849.5 847.7 849.6 853.2 856.4 860.1 855.5 853.4 MAX. QFE PRESSURE IN HPA 861.8 860.0 858.3 858.0 855.7 855.8 853.4 853.2 856.5 861.4 864.6 863.6 864.6 DAY 1 26 3 26 21 3 11 17 21 31 22 7 MIN. QFE PRESSURE IN HPA 853.0 847.3 840.9 846.9 849.2 841.8 844.4 845.2 849.4 851.8 856.2 848.7 840.9 DAY 27 10 20 14 29 27 26 5 8 2 16 12 MEAN QNH PRESSURE IN HPA 1025.4 1021.2 1019.5 1019.9 1020.8 1016.4 1014.4 1016.5 1020.8 1024.4 1028.7 1023.4 1020.9 MAX. QNH PRESSURE IN HPA 1030.7 1028.6 1026.6 1026.3 1023.6 1023.7 1021.0 1020.7 1024.5 1030.2 1033.9 1032.8 1033.9 DAY 1 26 3 26 21 3 11 17 21 31 22 7 MIN. QNH PRESSURE IN HPA 1020.5 1013.9 1006.5 1013.4 1016.1 1007.5 1010.6 1011.5 1016.3 1019.1 1024.2 1015.5 1006.5 DAY 27 10 20 14 29 27 26 5 8 2 16 12 MEAN QFF PRESSURE IN HPA 1022.2 1017.9 1014.6 1012.1 1009.0 1001.8 1000.0 1002.9 1009.0 1016.1 1025.6 1021.6 1012.7 MAX. QFF PRESSURE IN HPA 1026.4 1026.8 1026.9 1021.8 1015.6 1011.5 1006.7 1008.5 1013.3 1024.3 1031.8 1031.4 1031.8 DAY 6 26 3 26 10 3 11 16 21 31 22 7 MIN. QFF PRESSURE IN HPA 1015.5 1010.9 997.9 1001.5 1003.2 991.4 996.0 997.0 1004.4 1007.1 1021.2 1011.8 991.4 DAY 31 3 20 23 26 27 26 4 12 2 16 12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 856.1 852.6 851.2 851.2 852.1 848.3 846.8 848.7 852.1 855.5 859.2 854.7 852.4 MAX. QFE PRESSURE IN HPA 860.2 858.6 857.3 857.0 855.0 854.0 851.4 852.3 855.0 860.3 863.4 862.8 863.4 DAY 1 26 3 1 10 2 11 17 20 31 22 7 MIN. QFE PRESSURE IN HPA 851.8 846.9 839.4 845.3 848.0 841.2 843.2 844.0 848.0 850.4 855.5 848.3 839.4 DAY 27 10 20 23 26 27 26 5 8 1 30 12 MEAN QNH PRESSURE IN HPA 1024.1 1020.0 1018.4 1018.4 1019.4 1015.1 1013.3 1015.5 1019.5 1023.4 1027.7 1022.4 1019.8 MAX. QNH PRESSURE IN HPA 1028.8 1027.0 1025.5 1025.1 1022.8 1021.7 1018.6 1019.7 1022.8 1028.9 1032.5 1031.8 1032.5 DAY 1 26 3 1 10 2 11 17 20 31 22 7 MIN. QNH PRESSURE IN HPA 1019.1 1013.4 1004.8 1011.6 1014.7 1006.8 1009.2 1010.1 1014.7 1017.5 1023.4 1015.1 1004.8 DAY 27 10 20 23 26 27 26 5 8 1 30 12 MEAN QFF PRESSURE IN HPA 1022.2 1017.4 1014.4 1011.3 1008.7 1001.2 999.8 1003.0 1008.9 1016.3 1026.0 1021.9 1012.6 MAX. QFF PRESSURE IN HPA 1029.9 1025.6 1026.5 1021.6 1016.1 1010.5 1005.1 1009.4 1012.8 1024.4 1031.8 1031.8 1031.8 DAY 1 12 3 5 10 2 3 17 20 31 22 7 MIN. QFF PRESSURE IN HPA 1015.6 1010.4 996.9 1000.1 1001.8 990.7 995.8 995.9 1003.4 1006.3 1021.8 1012.1 990.7 DAY 31 15 20 23 26 27 26 5 1 1 16 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 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 857.0 853.3 851.9 851.7 852.3 848.7 847.2 849.1 852.7 856.4 860.3 855.6 853.0 MAX. QFE PRESSURE IN HPA 861.1 859.0 857.6 858.6 855.3 854.5 851.6 852.6 855.4 861.0 865.0 863.4 865.0 DAY 1 26 3 26 10 6 11 17 15 31 22 7 MIN. QFE PRESSURE IN HPA 853.4 848.6 840.3 845.5 847.5 842.2 844.0 844.3 848.0 850.7 856.4 849.0 840.3 DAY 27 2 20 23 26 27 26 5 8 1 30 12 MEAN QNH PRESSURE IN HPA 1025.1 1020.9 1019.2 1019.0 1019.7 1015.5 1013.8 1016.0 1020.2 1024.4 1028.9 1023.5 1020.5 MAX. QNH PRESSURE IN HPA 1029.9 1027.4 1025.8 1027.0 1023.2 1022.2 1018.9 1020.0 1023.3 1029.8 1034.4 1032.5 1034.4 DAY 1 26 3 26 10 6 11 17 15 31 22 7 MIN. QNH PRESSURE IN HPA 1021.0 1015.4 1005.8 1011.8 1014.1 1008.0 1010.1 1010.4 1014.7 1017.8 1024.4 1015.9 1005.8 DAY 27 2 20 23 26 27 26 5 8 1 30 12 MEAN QFF PRESSURE IN HPA 1025.1 1019.6 1016.5 1012.6 1008.9 1001.9 1000.6 1004.0 1010.6 1018.9 1029.7 1025.0 1014.5 MAX. QFF PRESSURE IN HPA 1032.9 1028.0 1027.5 1023.4 1016.5 1011.0 1005.8 1010.1 1015.0 1026.6 1036.9 1035.2 1036.9 DAY 1 12 3 26 10 6 11 16 20 31 25 7 MIN. QFF PRESSURE IN HPA 1019.0 1009.5 999.1 1000.8 1001.7 992.7 997.1 997.1 1005.0 1008.6 1024.9 1013.8 992.7 DAY 31 2 20 23 26 27 25 5 8 1 16 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 857.8 853.9 852.9 852.7 853.8 850.3 848.6 850.5 853.9 857.2 861.0 856.2 854.1 MAX. QFE PRESSURE IN HPA 862.0 860.0 858.0 859.9 856.4 856.5 852.8 853.5 857.0 862.0 865.8 863.6 865.8 DAY 1 12 3 26 10 2 10 17 15 31 22 7 MIN. QFE PRESSURE IN HPA 854.0 848.4 842.0 847.0 848.5 844.0 845.2 846.0 850.0 851.7 857.2 849.8 842.0 DAY 13 2 20 23 26 27 25 5 8 1 30 12 MEAN QNH PRESSURE IN HPA 1026.0 1021.6 1020.3 1020.2 1021.4 1017.4 1015.4 1017.7 1021.6 1025.4 1029.7 1024.3 1021.7 MAX. QNH PRESSURE IN HPA 1030.9 1028.6 1026.3 1028.5 1024.4 1024.5 1020.3 1021.1 1025.1 1030.9 1035.3 1032.8 1035.3 DAY 1 12 3 26 10 2 10 17 15 31 22 7 MIN. QNH PRESSURE IN HPA 1021.7 1015.2 1007.8 1013.6 1015.3 1010.1 1011.5 1012.4 1017.0 1019.0 1025.4 1016.8 1007.8 DAY 13 2 20 23 26 27 25 5 8 1 30 12 MEAN QFF PRESSURE IN HPA 1024.7 1019.4 1016.1 1012.7 1009.9 1003.1 1001.5 1004.7 1010.3 1017.9 1027.8 1024.1 1014.4 MAX. QFF PRESSURE IN HPA 1033.2 1027.6 1027.8 1025.2 1017.2 1011.3 1005.7 1009.7 1014.2 1026.3 1034.4 1033.5 1034.4 DAY 1 12 3 26 10 6 11 16 4 31 22 7 MIN. QFF PRESSURE IN HPA 1018.1 1008.3 1001.7 1002.0 1001.8 993.7 996.8 997.9 1004.6 1007.2 1023.0 1013.7 993.7 DAY 30 2 20 18 26 27 25 5 8 1 19 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 857.4 853.5 852.6 852.5 853.6 850.1 848.5 850.3 853.8 856.9 860.6 856.0 853.8 MAX. QFE PRESSURE IN HPA 861.0 860.0 858.0 859.4 856.4 856.1 852.8 853.4 856.9 861.0 865.4 863.2 865.4 DAY 1 26 10 26 10 2 10 16 21 9 22 7 MIN. QFE PRESSURE IN HPA 852.4 847.0 841.4 845.8 850.0 843.8 845.2 846.0 850.3 851.4 857.0 849.8 841.4 DAY 13 9 19 23 26 27 25 5 8 1 30 12 MEAN QNH PRESSURE IN HPA 1025.6 1021.1 1020.1 1019.9 1021.2 1017.1 1015.3 1017.4 1021.4 1025.0 1029.3 1023.9 1021.4 MAX. QNH PRESSURE IN HPA 1029.8 1028.6 1026.3 1027.9 1024.4 1024.1 1020.3 1021.0 1025.0 1029.8 1034.8 1032.3 1034.8 DAY 1 26 10 26 10 2 10 16 21 9 22 7 MIN. QNH PRESSURE IN HPA 1019.8 1013.6 1007.1 1012.2 1017.0 1009.9 1011.5 1012.4 1017.4 1018.6 1025.1 1016.8 1007.1 DAY 13 9 19 23 26 27 25 5 8 1 30 12 MEAN QFF PRESSURE IN HPA 1022.7 1017.8 1015.2 1012.0 1009.5 1002.7 1001.0 1003.9 1009.8 1016.5 1026.4 1022.3 1013.3 MAX. QFF PRESSURE IN HPA 1030.0 1026.3 1026.4 1023.9 1017.4 1012.0 1005.8 1008.9 1013.4 1022.8 1033.6 1031.4 1033.6 DAY 1 26 3 5 10 2 3 16 4 22 22 7 MIN. QFF PRESSURE IN HPA 1015.6 1006.9 997.2 1000.4 1003.3 993.7 996.7 996.6 1005.3 1006.4 1022.0 1012.3 993.7 DAY 27 2 19 23 26 27 25 5 8 1 4 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 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.4 6.2 11.1 14.9 22.7 26.6 29.8 27.2 24.6 17.3 12.6 5.1 16.8 MINIMUN AIR TEMPERATURE (C) -2.4 1.5 4.4 8.8 13.9 17.3 20.8 18.0 14.4 7.9 4.8 -1.3 9.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 6 13 7 0 0 0 0 27 DAYS WITH MINIMUM TEMP. <=-4 14 1 0 0 0 0 0 0 0 0 1 9 25 DAYS WITH FREEZING MIN.<= 0 25 7 8 4 0 0 0 0 0 1 4 17 66 TEMPERATURE RECORDS LOWEST(C) -11.0 -4.0 -3.0 -2.0 8.0 12.0 17.0 11.0 10.0 0.0 -4.0 -10.0 -11.0 DAY 8 21 1 1 2 8 2 27 16 24 30 2 MAXIMUM AIR TEMPERATURE (C) 11.0 12.4 19.0 22.0 30.5 34.2 37.4 34.8 33.3 26.7 21.6 12.6 24.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 16 29 31 31 29 5 0 0 142 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 21.0 26.0 31.0 38.0 38.0 44.0 38.0 37.0 32.0 26.0 18.0 44.0 DAY 19 24 8 22 31 22 11 1 7 2 3 17 DIF. BETWEEN (MAX.-MIN.) (C) 13.4 10.9 14.6 13.2 16.6 16.9 16.6 16.8 18.9 18.8 16.8 13.9 15.6 MEAN DAILY TEMP. (MDT) (C) 4.3 7.0 11.7 15.4 22.2 25.8 29.1 26.4 23.8 17.3 13.2 5.6 16.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.0 72.5 143.5 250.5 167.5 88.5 5.0 0.0 0.0 731.5 HEATING DEG. DAYS(BASE 18 0C) 424.0 308.5 197.0 101.0 7.0 0.0 0.0 0.0 0.0 54.0 143.5 383.0 1618.0 DEWPOINT (MEAN C) -5.0 -0.3 -3.7 4.1 3.7 5.3 7.2 2.8 2.8 -0.3 1.2 -3.4 1.2 MIXING RATIO (G/KG) 3.24 4.52 3.53 6.24 5.98 6.77 7.72 5.70 5.61 4.60 5.08 3.70 5.22 VAPOUR PRESSURE (HPA) 4.44 6.15 4.80 8.45 8.12 9.15 10.38 7.70 7.62 6.29 6.94 5.06 7.09 SATURATION DEF. (HPA) 4.08 3.86 9.42 9.85 21.32 27.19 33.32 29.93 25.01 15.00 8.70 4.31 16.00 RELATIVE HUMIDITY (MEAN %) 57 66 38 53 31 27 25 22 26 32 48 56 40 RELATIVE HUMIDITY (MAX. %) 72 80 56 74 46 36 33 32 35 47 64 72 54 RELATIVE HUMIDITY (MIN. %) 39 50 23 33 20 19 17 14 17 21 33 41 27 RELATIVE HUMIDITY (MEAN% 03UTC) 67 76 51 66 41 33 32 29 34 42 60 69 50 RELATIVE HUMIDITY (MEAN% 09UTC) 42 54 25 39 21 20 18 16 17 22 34 43 29 RELATIVE HUMIDITY (MEAN% 15UTC) 55 64 34 48 27 25 24 20 24 30 47 53 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.0 63.0 5.2 67.4 3.0 0.0 0.0 0.0 0.0 6.0 2.0 15.0 194.6 DAYS WITH PRECIPITATION >=10 1 1 0 3 0 0 0 0 0 0 0 1 6 DAYS WITH PRECIPITATION >= 5 4 6 0 6 0 0 0 0 0 1 0 1 18 DAYS WITH PRECIPITATION >= 1 4 10 3 10 2 0 0 0 0 1 2 1 33 DAYS WITH PRECIPITATION 4 10 6 17 3 1 0 0 0 2 3 1 47 GREATEST DAILY PRECIPITATION 11.0 18.0 3.0 14.4 2.0 0.0 0.0 0.0 0.0 6.0 1.0 15.0 18.0 DAY 22 13 31 14 1 ** ** ** ** 23 14 8 DAY WITH THUNDER STORM 1 2 0 9 1 0 0 0 0 0 0 0 13 DAYS WITH SNOW OR SLEET 3 6 0 3 0 0 0 0 0 0 0 0 12 DAYS WITH DUST 1 1 5 1 3 5 3 6 2 0 0 2 29 WIND DIRECTION (PREVAILING) 360 360 270 225 45 45 90 45 45 45 360 45 45 PREVAILING WIND SPEED(KNOTS) 5.0 5.2 7.6 7.7 6.1 10.0 9.3 10.7 7.5 5.9 5.2 5.7 8.0 PREVAILING WIND PERCENT 31.9 26.8 23.4 22.1 25.4 34.3 45.6 52.8 32.5 27.0 19.2 19.0 25.6 CALMS PERCENT OF WIND 36.3 29.0 15.3 6.3 7.3 5.4 1.2 2.4 8.3 16.5 20.1 36.7 15.4 NO. OF WIND OBSERVATION 248 224 248 240 248 239 248 248 240 248 239 248 2918 VECTOR WIND DIRECTION (MEAN) 351 2 293 296 4 39 64 60 50 359 359 18 34 VECTOR WIND MAGNITUDE(KNOTS) 1.7 1.1 2.3 1.2 2.6 5.3 8.5 8.4 3.7 2.2 1.9 1.2 2.7 WIND STEADINESES (MEAN %) 47.2 20.0 39.0 19.0 41.9 65.4 91.4 89.4 55.2 42.3 41.3 33.3 43.5 WIND SPEED (MEAN KNOTS) 3.6 5.5 5.9 6.3 6.2 8.1 9.3 9.4 6.7 5.2 4.6 3.6 6.2 FASTEST WIND DIRECTION 180 160 240 230 90 60 60 30 40 300 120 50 160 FASTEST WIND SPEED (KNOTS) 18 30 20 30 17 22 22 23 18 30 15 20 30 DAY 31 15 18 5 26 13 6 4 2 22 16 23 DAYS WITH SKY CLEAR (0-2)/8 22 15 18 7 27 26 30 31 29 24 18 17 264 DAYS WITH P.CLOUDY (3-6)/8 5 7 13 18 3 3 1 0 1 7 9 12 79 DAYS WITH CLOUDY (7-8)/8 4 6 0 5 1 1 0 0 0 0 3 2 22 DAYS WITH VISIBILITY =< 2 KM 2 2 2 2 0 1 1 1 0 1 0 0 12 DURATION OF SUNSHINE HOURS ****** ****** 175.1 206.5 320.3 340.8 365.5 359.2 314.8 285.8 223.4 213.9 ****** ======================================================================================================================= 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 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.9 852.7 850.8 851.8 853.0 850.2 847.7 849.3 852.5 857.8 856.7 855.7 852.9 MAX. QFE PRESSURE IN HPA 864.2 860.2 862.2 858.0 859.4 855.8 853.5 854.0 856.0 864.0 861.3 862.8 864.2 DAY-HOUR 13- 6 28- 6 3- 6 4- 6 3- 6 16- 6 15- 6 16- 6 15- 6 15- 6 6- 6 16- 6 MIN. QFE PRESSURE IN HPA 846.7 846.0 837.5 842.2 845.5 844.8 841.2 844.7 847.9 850.0 853.0 844.6 837.5 DAY-HOUR 22-12 6-12 24-12 25-12 18-15 19-12 10-12 6-12 6-12 3-12 27-12 23-12 MEAN QNH PRESSURE IN HPA 1025.0 1020.2 1017.9 1019.1 1020.5 1017.3 1014.4 1016.2 1019.9 1026.1 1024.7 1023.6 1020.4 MAX. QNH PRESSURE IN HPA 1033.4 1028.8 1031.1 1026.3 1027.9 1023.7 1021.1 1021.7 1024.0 1033.2 1030.1 1031.8 1033.4 DAY-HOUR 13- 6 28- 6 3- 6 4- 6 3- 6 16- 6 15- 6 16- 6 15- 6 15- 6 6- 6 16- 6 MIN. QNH PRESSURE IN HPA 1013.2 1012.4 1002.6 1008.0 1011.8 1011.0 1006.8 1010.9 1014.6 1017.0 1020.5 1010.8 1002.6 DAY-HOUR 22-12 6-12 24-12 25-12 18-15 19-12 10-12 6-12 6-12 3-12 27-12 23-12 MEAN QFF PRESSURE IN HPA 1026.5 1019.4 1014.1 1012.9 1009.8 1004.1 999.3 1002.8 1008.0 1018.6 1020.1 1023.8 1013.3 MAX. QFF PRESSURE IN HPA 1040.4 1030.6 1030.6 1027.6 1021.2 1013.1 1007.2 1009.7 1015.0 1028.6 1028.0 1032.7 1040.4 DAY-HOUR 6-15 28- 6 1- 3 4- 3 3- 3 16- 3 15- 3 29- 3 26- 3 26- 3 30-15 27-15 MIN. QFF PRESSURE IN HPA 1010.2 1007.1 998.6 998.4 998.7 997.0 989.3 996.0 1001.4 1005.2 1013.7 1008.1 989.3 DAY-HOUR 22-12 25-12 24-12 25-12 18-18 5-12 10-12 1-12 7-12 3- 9 13-21 23-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 856.7 852.1 850.5 851.3 852.9 850.2 847.8 849.4 852.4 857.6 856.5 855.5 852.7 MAX. QFE PRESSURE IN HPA 862.4 857.9 859.7 856.0 858.3 854.7 852.8 853.0 854.7 862.0 859.8 861.8 862.4 DAY 7 28 4 13 3 16 15 16 21 29 6 16 MIN. QFE PRESSURE IN HPA 848.8 847.3 840.2 843.2 847.8 845.2 843.1 845.9 849.2 852.1 853.7 845.8 840.2 DAY 22 16 24 27 19 6 11 6 7 3 26 24 MEAN QNH PRESSURE IN HPA 1024.8 1019.4 1017.6 1018.5 1020.4 1017.3 1014.5 1016.3 1019.8 1025.8 1024.5 1023.4 1020.2 MAX. QNH PRESSURE IN HPA 1031.4 1026.2 1028.2 1024.0 1026.6 1022.5 1020.3 1020.5 1022.5 1030.9 1028.4 1030.7 1031.4 DAY 7 28 4 13 3 16 15 16 21 29 6 16 MIN. QNH PRESSURE IN HPA 1015.6 1013.9 1005.7 1009.2 1014.5 1011.5 1009.0 1012.3 1016.1 1019.5 1021.3 1012.2 1005.7 DAY 22 16 24 27 19 6 11 6 7 3 26 24 MEAN QFF PRESSURE IN HPA 1026.0 1018.2 1013.6 1012.2 1010.0 1004.3 999.4 1002.6 1007.9 1018.4 1019.8 1023.4 1013.0 MAX. QFF PRESSURE IN HPA 1037.8 1027.4 1028.6 1024.8 1019.2 1011.6 1004.9 1007.4 1011.5 1025.5 1023.8 1029.7 1037.8 DAY 7 21 1 4 3 8 15 17 27 24 18 2 MIN. QFF PRESSURE IN HPA 1011.3 1009.1 1000.6 1001.7 1000.4 997.3 991.8 997.6 1002.9 1008.5 1014.2 1009.4 991.8 DAY 22 25 23 27 19 6 11 5 7 2 14 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.3 852.9 851.4 852.3 853.8 851.0 848.6 849.9 853.2 858.4 857.2 856.0 853.5 MAX. QFE PRESSURE IN HPA 863.0 859.1 860.6 857.1 859.3 855.7 853.4 853.2 855.5 862.6 860.3 862.0 863.0 DAY 13 28 3 4 3 16 14 16 15 15 6 16 MIN. QFE PRESSURE IN HPA 847.8 847.9 840.5 843.5 848.6 846.9 843.1 846.2 850.0 852.1 854.2 847.6 840.5 DAY 22 15 24 27 19 20 10 6 7 3 20 24 MEAN QNH PRESSURE IN HPA 1025.4 1020.4 1018.6 1019.7 1021.4 1018.2 1015.4 1016.9 1020.7 1026.8 1025.4 1024.0 1021.1 MAX. QNH PRESSURE IN HPA 1032.1 1027.6 1029.3 1025.2 1027.8 1023.6 1021.0 1020.7 1023.4 1031.6 1028.9 1030.9 1032.1 DAY 13 28 3 4 3 16 14 16 15 15 6 16 MIN. QNH PRESSURE IN HPA 1014.5 1014.6 1006.0 1009.5 1015.4 1013.4 1009.0 1012.6 1017.0 1019.5 1021.9 1014.3 1006.0 DAY 22 15 24 27 19 20 10 6 7 3 20 24 MEAN QFF PRESSURE IN HPA 1028.5 1020.8 1016.4 1014.7 1011.9 1005.8 1001.3 1004.6 1010.4 1021.2 1022.6 1025.9 1015.3 MAX. QFF PRESSURE IN HPA 1040.0 1030.3 1030.6 1027.6 1021.2 1013.1 1007.2 1009.7 1015.0 1028.6 1027.4 1032.4 1040.0 DAY 7 21 1 4 3 16 15 29 26 26 18 28 MIN. QFF PRESSURE IN HPA 1011.6 1011.9 1001.9 1003.2 1002.7 999.5 992.8 999.8 1005.5 1010.2 1016.8 1013.7 992.8 DAY 22 15 23 27 19 20 10 5 7 3 20 24 ======================================================================================================================= 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 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.4 853.9 852.1 853.0 854.0 851.0 848.4 850.0 853.6 859.0 857.9 857.1 854.0 MAX. QFE PRESSURE IN HPA 864.2 860.2 862.2 858.0 859.4 855.8 853.5 854.0 856.0 864.0 861.3 862.8 864.2 DAY 13 28 3 4 3 16 15 16 15 15 6 16 MIN. QFE PRESSURE IN HPA 848.2 849.0 840.1 843.9 849.0 847.0 843.0 846.4 850.0 851.8 855.2 850.0 840.1 DAY 22 6 24 27 19 20 10 6 7 3 20 24 MEAN QNH PRESSURE IN HPA 1026.7 1021.5 1019.5 1020.5 1021.7 1018.2 1015.2 1017.0 1021.1 1027.4 1026.2 1025.2 1021.7 MAX. QNH PRESSURE IN HPA 1033.4 1028.8 1031.1 1026.3 1027.9 1023.7 1021.1 1021.7 1024.0 1033.2 1030.1 1031.8 1033.4 DAY 13 28 3 4 3 16 15 16 15 15 6 16 MIN. QNH PRESSURE IN HPA 1014.9 1015.9 1005.6 1010.0 1015.9 1013.6 1008.9 1012.9 1017.0 1019.1 1023.0 1017.0 1005.6 DAY 22 6 24 27 19 20 10 6 7 3 20 24 MEAN QFF PRESSURE IN HPA 1028.4 1020.8 1015.4 1013.8 1010.6 1004.7 1000.0 1003.4 1008.6 1019.2 1021.0 1025.4 1014.3 MAX. QFF PRESSURE IN HPA 1039.1 1030.6 1029.6 1026.6 1020.0 1011.6 1006.6 1008.3 1012.5 1026.9 1025.3 1030.9 1039.1 DAY 6 28 3 4 3 16 15 16 26 27 30 16 MIN. QFF PRESSURE IN HPA 1011.0 1011.5 1001.1 1001.3 1001.2 998.4 990.4 998.4 1003.2 1007.2 1017.0 1016.2 990.4 DAY 22 25 24 25 19 20 10 4 7 3 14 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 857.0 852.9 850.8 852.0 852.9 850.0 847.3 848.8 852.3 857.4 856.3 855.3 852.8 MAX. QFE PRESSURE IN HPA 862.1 859.1 860.9 858.0 858.7 854.6 852.4 852.4 854.6 862.2 859.8 860.8 862.2 DAY 6 28 3 13 3 16 14 16 26 15 6 16 MIN. QFE PRESSURE IN HPA 848.0 847.0 838.7 844.2 847.8 846.4 842.0 845.6 849.2 850.2 853.8 847.0 838.7 DAY 22 6 24 25 19 20 10 6 7 3 26 23 MEAN QNH PRESSURE IN HPA 1025.1 1020.4 1017.9 1019.3 1020.4 1017.0 1013.9 1015.7 1019.7 1025.6 1024.3 1023.2 1020.2 MAX. QNH PRESSURE IN HPA 1031.0 1027.6 1029.6 1026.3 1027.1 1022.4 1019.8 1019.8 1022.4 1031.1 1028.4 1029.5 1031.1 DAY 6 28 3 13 3 16 14 16 26 15 6 16 MIN. QNH PRESSURE IN HPA 1014.7 1013.6 1004.0 1010.3 1014.5 1012.9 1007.8 1011.9 1016.1 1017.3 1021.4 1013.6 1004.0 DAY 22 6 24 25 19 20 10 6 7 3 26 23 MEAN QFF PRESSURE IN HPA 1025.3 1018.5 1013.0 1012.5 1009.0 1003.2 998.1 1001.4 1006.7 1016.8 1018.1 1021.7 1012.0 MAX. QFF PRESSURE IN HPA 1036.3 1027.9 1027.1 1023.8 1019.1 1009.9 1005.1 1006.0 1011.4 1023.0 1022.8 1027.1 1036.3 DAY 6 28 3 4 3 16 15 16 26 26 30 28 MIN. QFF PRESSURE IN HPA 1010.8 1007.1 999.0 1000.3 1000.4 998.4 989.5 996.7 1001.7 1005.2 1014.9 1011.7 989.5 DAY 22 25 24 25 19 21 10 4 7 3 13 23 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.8 851.9 849.3 850.8 851.9 849.0 846.3 847.9 851.1 856.5 855.6 854.5 851.7 MAX. QFE PRESSURE IN HPA 861.5 857.3 859.0 858.0 856.8 853.6 851.4 851.9 853.4 861.9 858.7 859.3 861.9 DAY 6 28 3 13 2 16 14 16 26 15 6 16 MIN. QFE PRESSURE IN HPA 846.7 846.0 837.5 842.2 846.6 844.8 841.2 844.7 847.9 850.0 853.0 844.6 837.5 DAY 22 6 24 25 19 19 10 6 6 3 27 23 MEAN QNH PRESSURE IN HPA 1023.7 1019.2 1016.3 1017.9 1019.2 1015.9 1012.7 1014.6 1018.3 1024.5 1023.5 1022.3 1019.0 MAX. QNH PRESSURE IN HPA 1030.3 1025.5 1027.4 1026.3 1024.9 1021.2 1018.6 1019.2 1021.0 1030.8 1027.1 1027.8 1030.8 DAY 6 28 3 13 2 16 14 16 26 15 6 16 MIN. QNH PRESSURE IN HPA 1013.2 1012.4 1002.6 1008.0 1013.1 1011.0 1006.8 1010.9 1014.6 1017.0 1020.5 1010.8 1002.6 DAY 22 6 24 25 19 19 10 6 6 3 27 23 MEAN QFF PRESSURE IN HPA 1024.7 1018.0 1012.2 1011.5 1008.5 1002.7 997.4 1001.0 1006.4 1017.0 1018.7 1022.1 1011.7 MAX. QFF PRESSURE IN HPA 1036.0 1027.0 1025.8 1023.4 1018.1 1009.5 1004.0 1006.1 1011.4 1024.0 1024.1 1029.1 1036.0 DAY 6 28 3 3 2 7 15 16 26 15 30 27 MIN. QFF PRESSURE IN HPA 1010.2 1007.1 998.6 998.4 999.9 997.0 989.3 996.0 1001.4 1006.2 1014.1 1009.9 989.3 DAY 22 25 24 25 19 5 10 1 7 1 13 23 ======================================================================================================================= 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 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.6 852.8 850.3 851.3 852.1 849.3 846.7 848.4 851.7 857.4 856.3 855.4 852.3 MAX. QFE PRESSURE IN HPA 862.6 858.2 859.7 857.7 857.4 853.8 851.5 852.2 854.0 862.4 859.2 860.7 862.6 DAY 6 28 3 13 2 16 14 15 26 15 6 16 MIN. QFE PRESSURE IN HPA 848.3 846.0 839.5 842.7 845.5 844.9 841.8 844.9 848.2 851.2 853.3 845.3 839.5 DAY 22 6 24 26 18 19 10 5 18 1 27 23 MEAN QNH PRESSURE IN HPA 1024.6 1020.2 1017.3 1018.5 1019.4 1016.3 1013.2 1015.2 1019.0 1025.6 1024.3 1023.3 1019.7 MAX. QNH PRESSURE IN HPA 1031.6 1026.5 1028.2 1025.9 1025.6 1021.4 1018.8 1019.6 1021.7 1031.4 1027.7 1029.4 1031.6 DAY 6 28 3 13 2 16 14 15 26 15 6 16 MIN. QNH PRESSURE IN HPA 1015.1 1012.4 1004.9 1008.6 1011.8 1011.1 1007.5 1011.1 1014.9 1018.4 1020.8 1011.6 1004.9 DAY 22 6 24 26 18 19 10 5 18 1 27 23 MEAN QFF PRESSURE IN HPA 1027.5 1020.6 1015.0 1013.4 1009.7 1003.8 999.0 1002.8 1008.6 1020.0 1021.5 1025.1 1013.9 MAX. QFF PRESSURE IN HPA 1040.4 1029.8 1028.5 1024.0 1019.3 1011.3 1005.6 1007.3 1014.6 1027.0 1028.0 1032.7 1040.4 DAY 6 28 3 4 2 8 15 16 26 26 30 27 MIN. QFF PRESSURE IN HPA 1013.2 1010.3 1002.8 1000.5 999.1 997.2 991.0 997.4 1003.6 1009.5 1017.0 1012.9 991.0 DAY 22 25 23 25 18 20 10 1 7 1 20 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 857.2 853.0 851.2 852.3 853.5 850.6 848.4 850.2 853.0 858.4 857.0 856.0 853.4 MAX. QFE PRESSURE IN HPA 863.4 859.0 860.4 857.2 858.8 855.0 853.4 853.2 855.0 863.9 859.6 861.8 863.9 DAY 6 28 3 13 2 7 14 16 21 15 5 15 MIN. QFE PRESSURE IN HPA 850.0 847.0 840.6 843.7 847.0 846.6 843.1 846.6 849.8 852.4 854.7 845.2 840.6 DAY 20 6 24 26 18 20 10 5 18 1 25 23 MEAN QNH PRESSURE IN HPA 1025.3 1020.5 1018.4 1019.7 1021.0 1017.8 1015.2 1017.3 1020.5 1026.8 1025.2 1024.0 1021.0 MAX. QNH PRESSURE IN HPA 1032.5 1027.4 1029.1 1025.4 1027.2 1022.8 1021.0 1020.7 1022.8 1033.1 1028.1 1030.7 1033.1 DAY 6 28 3 13 2 7 14 16 21 15 5 15 MIN. QNH PRESSURE IN HPA 1017.0 1013.6 1006.2 1009.7 1013.6 1013.1 1009.0 1013.1 1016.8 1019.8 1022.5 1011.5 1006.2 DAY 20 6 24 26 18 20 10 5 18 1 25 23 MEAN QFF PRESSURE IN HPA 1027.0 1019.9 1014.4 1013.0 1009.8 1004.3 1000.1 1003.8 1008.1 1018.9 1020.1 1024.2 1013.6 MAX. QFF PRESSURE IN HPA 1039.9 1029.5 1027.7 1023.5 1018.7 1010.9 1007.1 1008.3 1012.2 1027.0 1026.2 1030.6 1039.9 DAY 6 28 3 3 2 7 15 16 26 26 30 27 MIN. QFF PRESSURE IN HPA 1013.2 1011.0 1002.1 999.2 998.7 997.4 991.1 998.7 1003.5 1008.8 1015.3 1010.6 991.1 DAY 20 25 23 25 18 20 10 4 6 3 13 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 856.6 852.6 850.7 851.9 853.1 850.6 848.2 850.1 852.8 858.1 856.7 855.7 853.1 MAX. QFE PRESSURE IN HPA 862.4 859.0 860.1 856.8 858.5 855.1 853.4 853.0 854.7 862.8 859.8 861.5 862.8 DAY 6 28 3 12 2 7 14 15 21 15 5 15 MIN. QFE PRESSURE IN HPA 849.4 847.6 840.8 843.4 847.0 846.0 843.6 845.9 849.8 852.0 854.0 845.2 840.8 DAY 20 15 23 26 18 5 10 5 16 3 25 23 MEAN QNH PRESSURE IN HPA 1024.7 1020.1 1017.9 1019.2 1020.6 1017.7 1015.0 1017.2 1020.2 1026.4 1024.8 1023.6 1020.6 MAX. QNH PRESSURE IN HPA 1031.4 1027.4 1028.7 1024.9 1026.9 1022.9 1021.0 1020.5 1022.5 1031.8 1028.4 1030.3 1031.8 DAY 6 28 3 12 2 7 14 15 21 15 5 15 MIN. QNH PRESSURE IN HPA 1016.3 1014.3 1006.4 1009.4 1013.6 1012.4 1009.6 1012.3 1016.8 1019.3 1021.7 1011.5 1006.4 DAY 20 15 23 26 18 5 10 5 16 3 25 23 MEAN QFF PRESSURE IN HPA 1024.7 1018.4 1013.0 1012.2 1009.0 1004.0 999.3 1003.0 1007.3 1017.8 1018.7 1022.4 1012.5 MAX. QFF PRESSURE IN HPA 1036.9 1028.6 1026.5 1023.5 1018.5 1011.5 1005.5 1007.3 1010.8 1025.4 1023.4 1028.7 1036.9 DAY 6 28 2 3 2 8 15 16 26 23 17 27 MIN. QFF PRESSURE IN HPA 1011.0 1007.4 999.6 1001.8 998.7 997.1 991.9 997.9 1003.0 1008.1 1013.7 1008.1 991.9 DAY 20 24 23 26 18 21 10 4 18 1 13 23 ======================================================================================================================= 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 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.3 4.5 13.0 17.2 20.7 28.6 28.0 26.9 ***** 17.6 11.2 6.0 ***** MINIMUN AIR TEMPERATURE (C) -1.9 -0.7 5.6 10.0 13.0 19.4 19.8 17.7 ***** 8.9 4.5 1.0 ***** DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 11 9 7 **** 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 12 5 1 0 0 0 0 0 **** 0 0 6 **** DAYS WITH FREEZING MIN.<= 0 22 18 5 0 0 0 0 0 **** 0 4 15 **** TEMPERATURE RECORDS LOWEST(C) -9.0 -11.0 -4.0 3.0 6.0 14.0 13.0 11.0 ***** 2.0 0.0 -7.0 ***** DAY 20 7 26 6 1 1 14 28 ** 31 13 24 MAXIMUM AIR TEMPERATURE (C) 11.5 11.2 20.5 24.8 28.2 36.7 35.8 34.8 ***** 27.5 20.3 13.3 ***** DAYS WITH MAXIMUM TEMP. >=30 0 0 0 5 14 30 31 30 **** 10 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 0 1 0 0 0 0 0 0 **** 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C) 21.0 21.0 29.0 34.0 34.0 41.0 42.0 38.0 ***** 35.0 25.0 20.0 ***** DAY 15 29 15 18 12 21 1 3 ** 1 5 4 DIF. BETWEEN (MAX.-MIN.) (C) 13.4 11.9 14.9 14.8 15.2 17.3 16.0 17.1 ***** 18.6 15.8 12.3 ***** MEAN DAILY TEMP. (MDT) (C) 4.8 5.3 13.0 17.4 20.6 28.1 27.8 26.2 ***** 18.2 12.4 7.2 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 14.5 40.5 212.0 211.0 162.5 ****** 5.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C) 408.0 369.5 159.0 60.5 19.5 0.0 0.0 0.0 ****** 32.5 167.0 336.0 ****** DEWPOINT (MEAN C) -4.5 -1.9 -0.2 4.8 3.6 5.9 4.4 1.1 ***** 1.2 0.4 -1.4 ***** MIXING RATIO (G/KG) 3.35 4.10 4.61 6.48 6.33 7.04 6.42 5.05 ****** 5.06 4.72 4.36 ****** VAPOUR PRESSURE (HPA) 4.57 5.59 6.27 8.80 8.59 9.51 8.67 6.84 ****** 6.92 6.48 5.95 ****** SATURATION DEF. (HPA) 4.28 3.44 9.84 12.15 16.99 31.35 31.05 30.41 ****** 14.97 7.73 3.97 ****** RELATIVE HUMIDITY (MEAN %) 56 66 44 47 36 25 24 20 *** 36 52 63 *** RELATIVE HUMIDITY (MAX. %) 71 81 63 64 49 32 33 29 *** 52 73 83 *** RELATIVE HUMIDITY (MIN. %) 39 47 29 33 24 17 16 13 *** 23 32 39 *** RELATIVE HUMIDITY (MEAN% 03UTC) 66 77 58 57 44 30 30 27 *** 45 68 79 *** RELATIVE HUMIDITY (MEAN% 09UTC) 43 50 31 37 26 18 17 14 *** 24 33 43 *** RELATIVE HUMIDITY (MEAN% 15UTC) 54 66 39 44 34 23 20 16 *** 32 49 62 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.6 38.0 15.0 34.6 34.5 0.0 0.0 0.0 ****** 1.0 18.2 28.2 ****** DAYS WITH PRECIPITATION >=10 0 0 1 1 2 0 0 0 **** 0 1 0 **** DAYS WITH PRECIPITATION >= 5 5 4 1 3 2 0 0 0 **** 0 1 2 **** DAYS WITH PRECIPITATION >= 1 7 8 2 6 3 0 0 0 **** 1 4 9 **** DAYS WITH PRECIPITATION 7 12 4 11 6 0 0 0 **** 1 10 13 **** GREATEST DAILY PRECIPITATION 9.0 8.0 12.0 11.0 20.0 0.0 0.0 0.0 ****** 1.0 10.0 9.0 ****** DAY 17 24 9 28 17 ** ** ** ** 27 19 9 DAY WITH THUNDER STORM 2 3 1 5 4 0 0 0 **** 0 0 5 **** DAYS WITH SNOW OR SLEET 4 2 0 0 0 0 0 0 **** 0 0 0 **** DAYS WITH DUST 5 3 7 5 3 6 9 6 **** 0 0 0 **** WIND DIRECTION (PREVAILING) 45 45 270 45 45 45 45 45 *** 360 135 90 *** PREVAILING WIND SPEED(KNOTS) 7.2 7.0 9.4 7.2 7.9 8.8 9.3 8.1 **** 5.8 5.3 4.8 **** PREVAILING WIND PERCENT 21.1 31.6 23.5 19.7 44.1 38.5 44.9 55.9 ***** 22.5 13.4 17.4 ***** CALMS PERCENT OF WIND 26.3 8.7 5.3 6.3 10.9 2.9 8.9 10.1 ***** 34.2 64.9 49.4 ***** NO. OF WIND OBSERVATION 247 231 247 239 247 239 247 247 **** 231 239 247 2661 VECTOR WIND DIRECTION (MEAN) 48 36 318 359 53 39 60 48 *** 358 114 101 *** VECTOR WIND MAGNITUDE(KNOTS) 1.3 2.3 2.4 1.2 4.6 4.3 6.8 5.9 **** 2.6 0.7 0.8 **** WIND STEADINESES (MEAN %) 24.5 33.8 31.6 16.4 67.6 53.1 86.1 83.1 ***** 56.5 35.0 29.6 ***** WIND SPEED (MEAN KNOTS) 5.3 6.8 7.6 7.3 6.8 8.1 7.9 7.1 **** 4.6 2.0 2.7 **** FASTEST WIND DIRECTION 250 90 240 210 60 270 80 30 *** 300 300 180 *** FASTEST WIND SPEED (KNOTS) 23 34 20 25 18 20 22 17 *** 20 12 15 *** DAY 16 3 15 3 28 5 7 10 ** 10 1 8 DAYS WITH SKY CLEAR (0-2)/8 18 18 17 9 18 24 31 31 **** 26 21 14 **** DAYS WITH P.CLOUDY (3-6)/8 10 6 10 15 13 6 0 0 **** 5 7 15 **** DAYS WITH CLOUDY (7-8)/8 3 5 4 6 0 0 0 0 **** 0 2 2 **** DAYS WITH VISIBILITY =< 2 KM 3 2 2 2 0 0 4 1 **** 0 0 0 **** DURATION OF SUNSHINE HOURS 212.9 204.7 242.8 209.4 300.7 319.6 366.8 359.0 ****** 276.5 203.3 182.8 ****** ======================================================================================================================= 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 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 853.8 854.9 853.6 853.8 854.4 850.3 849.6 850.6 ****** 857.7 860.3 857.2 ****** MAX. QFE PRESSURE IN HPA 861.0 860.0 862.6 859.9 859.1 857.7 854.1 856.4 ****** 864.2 866.2 863.4 ****** DAY-HOUR 12- 6 6- 6 27- 6 1- 3 8- 6 1- 3 19-21 30- 6 **-** 30-15 24- 6 17- 6 MIN. QFE PRESSURE IN HPA 845.0 843.8 846.3 844.7 849.9 842.9 842.7 845.6 ****** 851.7 851.4 848.7 ****** DAY-HOUR 16-21 3-12 19- 0 24-12 30-12 23-15 11-12 2-12 **-** 25-12 19- 0 9- 9 MEAN QNH PRESSURE IN HPA 1021.4 1022.7 1021.2 1021.4 1022.2 1017.4 1016.6 1017.7 ****** 1026.0 1028.9 1025.3 ****** MAX. QNH PRESSURE IN HPA 1029.8 1028.6 1031.6 1028.5 1027.6 1025.9 1021.8 1024.4 ****** 1033.4 1035.8 1032.5 ****** DAY-HOUR 12- 6 6- 6 27- 6 1- 3 8- 6 1- 3 19-21 30- 6 **-** 30-15 24- 6 17- 6 MIN. QNH PRESSURE IN HPA 1011.2 1009.9 1012.7 1010.9 1016.9 1008.8 1008.6 1011.9 ****** 1019.0 1018.6 1015.5 ****** DAY-HOUR 16-21 3-12 19- 0 24-12 30-12 23-15 11-12 2-12 **-** 25-12 19- 0 9- 9 MEAN QFF PRESSURE IN HPA 1022.1 1023.2 1016.2 1013.7 1012.5 1003.1 1002.7 1004.6 ****** 1018.4 1025.3 1024.9 ****** MAX. QFF PRESSURE IN HPA 1035.9 1037.0 1032.8 1023.8 1020.2 1015.4 1010.6 1014.7 ****** 1031.4 1034.3 1036.7 ****** DAY-HOUR 20- 3 7- 3 27- 6 1- 3 1- 6 1- 3 16- 3 28- 3 **-** 30-15 24- 3 24- 3 MIN. QFF PRESSURE IN HPA 1007.7 1009.0 1005.6 1000.7 1005.4 992.9 993.8 998.2 ****** 1009.1 1014.5 1011.1 ****** DAY-HOUR 16-21 3-12 18- 9 24-12 28-12 21-12 12-12 2-12 **-** 11- 9 19- 0 9- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 853.7 854.4 853.1 853.7 854.3 850.3 849.9 850.6 ****** 857.6 860.3 857.1 ****** MAX. QFE PRESSURE IN HPA 860.4 858.3 860.4 859.1 858.4 856.7 853.9 855.5 ****** 863.6 864.4 862.0 ****** DAY 20 6 27 1 8 1 20 30 ** 31 24 22 MIN. QFE PRESSURE IN HPA 847.4 846.6 846.3 846.6 850.7 845.0 845.3 847.4 ****** 851.7 851.4 851.2 ****** DAY 17 3 19 25 18 23 12 2 ** 27 19 9 MEAN QNH PRESSURE IN HPA 1021.3 1022.1 1020.7 1021.3 1022.0 1017.4 1017.0 1017.7 ****** 1025.8 1028.9 1025.2 ****** MAX. QNH PRESSURE IN HPA 1029.1 1026.6 1029.1 1027.6 1026.7 1024.8 1021.5 1023.4 ****** 1032.8 1033.7 1030.9 ****** DAY 20 6 27 1 8 1 20 30 ** 31 24 22 MIN. QNH PRESSURE IN HPA 1014.0 1013.1 1012.7 1013.1 1017.8 1011.2 1011.6 1014.0 ****** 1019.0 1018.6 1018.4 ****** DAY 17 3 19 25 18 23 12 2 ** 27 19 9 MEAN QFF PRESSURE IN HPA 1021.7 1022.5 1015.7 1013.8 1012.8 1003.6 1003.0 1004.7 ****** 1018.7 1025.3 1024.2 ****** MAX. QFF PRESSURE IN HPA 1034.8 1034.4 1029.9 1021.9 1019.4 1014.4 1009.8 1013.1 ****** 1029.8 1032.0 1034.0 ****** DAY 20 7 27 1 8 1 16 28 ** 31 24 24 MIN. QFF PRESSURE IN HPA 1010.9 1011.5 1006.0 1003.4 1007.8 995.4 996.8 999.8 ****** 1010.6 1014.5 1013.6 ****** DAY 17 3 23 24 15 21 12 14 ** 11 19 9 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 854.1 855.1 854.1 854.6 855.1 851.3 850.4 851.1 ****** 858.3 860.7 857.3 ****** MAX. QFE PRESSURE IN HPA 860.2 859.4 861.8 859.9 859.0 857.7 854.1 855.8 ****** 862.5 865.1 862.5 ****** DAY 20 7 27 1 8 1 20 30 ** 17 24 22 MIN. QFE PRESSURE IN HPA 847.4 846.0 847.0 847.2 851.2 846.0 845.8 847.7 ****** 852.7 851.9 850.3 ****** DAY 23 3 19 25 17 23 12 2 ** 27 19 9 MEAN QNH PRESSURE IN HPA 1021.8 1023.0 1021.7 1022.4 1022.9 1018.5 1017.5 1018.3 ****** 1026.6 1029.4 1025.5 ****** MAX. QNH PRESSURE IN HPA 1028.8 1027.9 1030.7 1028.5 1027.4 1025.9 1021.8 1023.7 ****** 1031.5 1034.5 1031.5 ****** DAY 20 7 27 1 8 1 20 30 ** 17 24 22 MIN. QNH PRESSURE IN HPA 1014.0 1012.4 1013.6 1013.8 1018.4 1012.4 1012.2 1014.4 ****** 1020.2 1019.2 1017.4 ****** DAY 23 3 19 25 17 23 12 2 ** 27 19 9 MEAN QFF PRESSURE IN HPA 1023.9 1024.7 1018.2 1015.7 1014.0 1004.9 1004.2 1006.3 ****** 1020.8 1027.1 1026.3 ****** MAX. QFF PRESSURE IN HPA 1035.9 1037.0 1032.7 1023.8 1020.1 1015.4 1010.6 1014.7 ****** 1029.3 1034.3 1036.7 ****** DAY 20 7 27 1 2 1 16 28 ** 31 24 24 MIN. QFF PRESSURE IN HPA 1013.5 1012.4 1009.6 1005.5 1008.7 996.8 997.8 1001.5 ****** 1012.0 1015.7 1013.6 ****** DAY 17 3 19 24 17 21 12 9 ** 11 19 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 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 855.2 856.0 854.7 855.0 855.3 851.2 850.1 851.3 ****** 858.8 861.3 858.2 ****** MAX. QFE PRESSURE IN HPA 861.0 860.0 862.6 859.8 859.1 857.0 853.4 856.4 ****** 863.0 866.2 863.4 ****** DAY 12 6 27 1 8 1 20 30 ** 16 24 17 MIN. QFE PRESSURE IN HPA 849.0 846.4 847.8 848.8 851.0 846.3 845.6 848.1 ****** 853.6 853.7 850.9 ****** DAY 23 3 19 24 17 23 12 2 ** 11 19 9 MEAN QNH PRESSURE IN HPA 1023.0 1023.9 1022.4 1022.8 1023.1 1018.5 1017.2 1018.5 ****** 1027.2 1030.1 1026.6 ****** MAX. QNH PRESSURE IN HPA 1029.8 1028.6 1031.6 1028.4 1027.6 1025.1 1021.0 1024.4 ****** 1032.1 1035.8 1032.5 ****** DAY 12 6 27 1 8 1 20 30 ** 16 24 17 MIN. QNH PRESSURE IN HPA 1015.9 1012.9 1014.5 1015.6 1018.2 1012.7 1011.9 1014.8 ****** 1021.2 1021.3 1018.1 ****** DAY 23 3 19 24 17 23 12 2 ** 11 19 9 MEAN QFF PRESSURE IN HPA 1023.9 1024.5 1017.3 1014.6 1013.3 1003.9 1003.3 1005.0 ****** 1018.8 1026.4 1026.3 ****** MAX. QFF PRESSURE IN HPA 1034.2 1036.0 1032.8 1022.4 1020.2 1013.3 1009.9 1013.0 ****** 1026.4 1034.2 1035.4 ****** DAY 20 7 27 1 1 2 15 28 ** 31 24 23 MIN. QFF PRESSURE IN HPA 1013.8 1013.1 1008.2 1004.5 1006.5 996.9 996.7 1000.4 ****** 1010.4 1017.3 1013.3 ****** DAY 16 3 18 24 17 21 12 3 ** 11 19 9 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 853.6 855.0 853.5 853.8 854.2 850.3 849.2 850.3 ****** 857.4 859.9 856.9 ****** MAX. QFE PRESSURE IN HPA 859.4 859.0 860.8 858.8 857.9 856.1 852.5 855.2 ****** 861.6 864.1 861.5 ****** DAY 12 7 27 1 8 1 16 30 ** 16 24 23 MIN. QFE PRESSURE IN HPA 846.5 845.0 847.4 848.0 850.1 844.7 844.5 847.0 ****** 853.0 854.6 848.7 ****** DAY 7 3 19 24 17 23 11 2 ** 11 19 9 MEAN QNH PRESSURE IN HPA 1021.2 1022.8 1021.1 1021.4 1021.9 1017.4 1016.1 1017.4 ****** 1025.6 1028.5 1025.0 ****** MAX. QNH PRESSURE IN HPA 1027.9 1027.4 1029.5 1027.2 1026.2 1024.1 1019.9 1023.0 ****** 1030.4 1033.3 1030.3 ****** DAY 12 7 27 1 8 1 16 30 ** 16 24 23 MIN. QNH PRESSURE IN HPA 1013.0 1011.2 1014.0 1014.7 1017.1 1010.9 1010.7 1013.6 ****** 1020.5 1022.4 1015.5 ****** DAY 7 3 19 24 17 23 11 2 ** 11 19 9 MEAN QFF PRESSURE IN HPA 1020.7 1022.4 1015.0 1012.9 1011.5 1002.2 1001.6 1003.5 ****** 1016.8 1023.6 1023.5 ****** MAX. QFF PRESSURE IN HPA 1030.1 1033.7 1029.6 1019.3 1018.4 1011.0 1007.8 1012.1 ****** 1024.4 1030.0 1033.0 ****** DAY 20 7 27 8 8 2 16 30 ** 30 23 23 MIN. QFF PRESSURE IN HPA 1009.5 1010.4 1005.6 1003.8 1005.4 994.0 995.1 999.2 ****** 1009.1 1018.0 1011.1 ****** DAY 7 3 18 24 30 21 12 13 ** 11 18 9 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 852.7 853.7 852.4 852.4 853.3 849.0 848.3 849.4 ****** 856.6 859.2 856.3 ****** MAX. QFE PRESSURE IN HPA 858.7 857.7 859.4 858.0 857.4 855.0 851.7 854.7 ****** 861.4 862.9 861.6 ****** DAY 19 6 27 1 8 1 16 30 ** 16 25 23 MIN. QFE PRESSURE IN HPA 846.1 843.8 846.4 844.7 849.9 843.1 842.7 845.6 ****** 851.7 855.3 848.8 ****** DAY 22 3 18 24 30 21 11 2 ** 25 18 9 MEAN QNH PRESSURE IN HPA 1020.2 1021.4 1019.9 1019.8 1020.8 1015.9 1015.1 1016.3 ****** 1024.7 1027.6 1024.3 ****** MAX. QNH PRESSURE IN HPA 1027.1 1025.9 1027.9 1026.3 1025.6 1022.8 1019.0 1022.5 ****** 1030.2 1031.9 1030.4 ****** DAY 19 6 27 1 8 1 16 30 ** 16 25 23 MIN. QNH PRESSURE IN HPA 1012.5 1009.9 1012.9 1010.9 1016.9 1009.0 1008.6 1011.9 ****** 1019.0 1023.2 1015.6 ****** DAY 22 3 18 24 30 21 11 2 ** 25 18 9 MEAN QFF PRESSURE IN HPA 1020.4 1021.6 1014.8 1012.2 1011.4 1001.8 1001.0 1003.2 ****** 1017.3 1023.9 1023.3 ****** MAX. QFF PRESSURE IN HPA 1030.8 1033.2 1028.7 1019.7 1018.9 1011.5 1008.2 1012.2 ****** 1025.2 1029.8 1033.5 ****** DAY 19 6 27 1 1 1 16 30 ** 30 22 23 MIN. QFF PRESSURE IN HPA 1008.7 1009.0 1005.7 1000.7 1005.4 992.9 993.8 998.2 ****** 1009.8 1017.4 1012.5 ****** DAY 7 3 18 24 28 21 12 2 ** 11 2 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 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 853.6 854.5 853.0 852.9 853.6 849.1 848.6 849.7 ****** 857.3 859.9 857.0 ****** MAX. QFE PRESSURE IN HPA 860.2 858.8 860.6 857.9 857.8 855.6 852.0 854.9 ****** 864.2 864.1 862.2 ****** DAY 19 5 27 1 8 1 15 30 ** 30 24 21 MIN. QFE PRESSURE IN HPA 846.2 845.8 847.0 846.1 850.4 842.9 843.1 845.9 ****** 852.0 854.3 849.1 ****** DAY 22 3 22 24 29 23 11 2 ** 25 18 9 MEAN QNH PRESSURE IN HPA 1021.2 1022.3 1020.5 1020.4 1021.2 1015.9 1015.4 1016.6 ****** 1025.4 1028.5 1025.1 ****** MAX. QNH PRESSURE IN HPA 1028.8 1027.2 1029.3 1026.2 1026.1 1023.5 1019.3 1022.7 ****** 1033.4 1033.3 1031.1 ****** DAY 19 5 27 1 8 1 15 30 ** 30 24 21 MIN. QNH PRESSURE IN HPA 1012.6 1012.2 1013.6 1012.5 1017.5 1008.8 1009.0 1012.3 ****** 1019.3 1022.0 1016.0 ****** DAY 22 3 22 24 29 23 11 2 ** 25 18 9 MEAN QFF PRESSURE IN HPA 1023.1 1023.8 1016.9 1013.7 1012.1 1002.1 1002.1 1004.5 ****** 1019.4 1026.1 1026.0 ****** MAX. QFF PRESSURE IN HPA 1034.0 1035.3 1031.0 1020.9 1019.4 1012.7 1009.1 1013.7 ****** 1031.4 1032.7 1036.1 ****** DAY 19 7 27 1 1 1 15 30 ** 30 23 23 MIN. QFF PRESSURE IN HPA 1009.0 1012.5 1007.8 1003.9 1006.6 994.4 995.0 999.5 ****** 1012.4 1016.1 1013.1 ****** DAY 16 3 22 23 29 23 11 8 ** 25 18 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 854.2 855.4 854.2 854.2 855.2 850.8 850.3 851.5 ****** 858.2 860.5 857.6 ****** MAX. QFE PRESSURE IN HPA 861.0 859.7 861.7 858.2 859.0 857.0 853.6 856.2 ****** 863.8 864.7 862.7 ****** DAY 19 5 27 1 8 1 15 30 ** 30 24 18 MIN. QFE PRESSURE IN HPA 846.0 848.8 847.0 848.0 851.5 846.0 845.7 847.8 ****** 852.6 854.1 851.3 ****** DAY 22 3 18 23 17 21 11 1 ** 25 18 9 MEAN QNH PRESSURE IN HPA 1021.9 1023.3 1021.9 1021.9 1023.1 1017.9 1017.4 1018.8 ****** 1026.5 1029.1 1025.8 ****** MAX. QNH PRESSURE IN HPA 1029.8 1028.2 1030.6 1026.5 1027.4 1025.1 1021.2 1024.2 ****** 1033.0 1034.0 1031.7 ****** DAY 19 5 27 1 8 1 15 30 ** 30 24 18 MIN. QNH PRESSURE IN HPA 1012.4 1015.6 1013.6 1014.7 1018.8 1012.4 1012.1 1014.5 ****** 1020.0 1021.8 1018.5 ****** DAY 22 3 18 23 17 21 11 1 ** 25 18 9 MEAN QFF PRESSURE IN HPA 1022.7 1023.8 1016.7 1013.8 1013.2 1003.4 1003.5 1005.4 ****** 1018.1 1025.4 1025.6 ****** MAX. QFF PRESSURE IN HPA 1034.6 1034.9 1031.5 1020.3 1020.1 1013.0 1009.8 1013.6 ****** 1027.6 1032.8 1035.1 ****** DAY 19 6 27 7 8 1 15 25 ** 30 23 23 MIN. QFF PRESSURE IN HPA 1009.3 1016.6 1006.8 1003.6 1007.9 996.9 996.9 1000.5 ****** 1010.6 1015.4 1015.8 ****** DAY 16 3 18 23 30 21 6 1 ** 25 18 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 853.5 855.0 853.7 854.0 854.5 850.4 850.2 851.1 ****** 857.9 860.7 857.2 ****** MAX. QFE PRESSURE IN HPA 860.6 859.0 861.3 857.6 859.0 856.3 854.1 855.5 ****** 863.8 864.5 862.1 ****** DAY 19 5 27 1 7 1 19 30 ** 30 23 21 MIN. QFE PRESSURE IN HPA 845.0 849.0 846.8 847.6 850.3 845.3 845.7 847.7 ****** 851.7 853.9 851.4 ****** DAY 16 3 18 24 17 21 11 2 ** 26 18 9 MEAN QNH PRESSURE IN HPA 1021.1 1022.8 1021.3 1021.7 1022.3 1017.5 1017.2 1018.3 ****** 1026.2 1029.4 1025.3 ****** MAX. QNH PRESSURE IN HPA 1029.3 1027.4 1030.1 1025.8 1027.4 1024.3 1021.8 1023.4 ****** 1033.0 1033.8 1031.0 ****** DAY 19 5 27 1 7 1 19 30 ** 30 23 21 MIN. QNH PRESSURE IN HPA 1011.2 1015.9 1013.3 1014.3 1017.4 1011.6 1012.1 1014.4 ****** 1019.0 1021.5 1018.6 ****** DAY 16 3 18 24 17 21 11 2 ** 26 18 9 MEAN QFF PRESSURE IN HPA 1020.7 1022.6 1015.4 1013.4 1012.1 1002.7 1002.8 1004.4 ****** 1017.4 1024.5 1023.8 ****** MAX. QFF PRESSURE IN HPA 1034.5 1034.0 1030.2 1020.0 1020.0 1011.5 1009.3 1012.3 ****** 1027.6 1031.3 1034.2 ****** DAY 19 5 27 8 7 1 15 27 ** 30 23 23 MIN. QFF PRESSURE IN HPA 1007.7 1015.4 1006.0 1004.8 1005.7 994.9 996.4 999.8 ****** 1009.7 1014.5 1014.2 ****** DAY 16 2 18 24 16 21 6 13 ** 26 18 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 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.7 5.3 15.3 17.0 22.0 26.6 28.9 24.8 21.4 18.5 7.6 7.4 16.6 MINIMUN AIR TEMPERATURE (C) -1.3 -0.5 8.2 10.3 13.7 17.4 20.7 16.6 11.8 10.0 0.0 -0.0 8.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 6 17 5 0 0 0 0 28 DAYS WITH MINIMUM TEMP. <=-4 11 8 0 0 0 0 0 0 0 0 10 4 33 DAYS WITH FREEZING MIN.<= 0 23 15 1 0 0 0 0 0 0 0 18 18 75 TEMPERATURE RECORDS LOWEST(C) -10.0 -8.0 0.0 2.0 6.0 11.0 17.0 12.0 5.0 6.0 -8.0 -5.0 -10.0 DAY 1 1 25 15 13 9 14 23 14 16 20 11 MAXIMUM AIR TEMPERATURE (C) 10.5 12.3 22.9 24.3 30.4 34.2 37.0 33.1 30.4 27.6 16.6 16.6 24.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 5 19 28 31 31 22 7 0 0 143 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 29.0 32.0 37.0 40.0 41.0 38.0 36.0 32.0 23.0 21.0 41.0 DAY 23 28 11 2 27 25 6 4 11 7 2 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 12.8 14.7 14.0 16.7 16.8 16.3 16.5 18.6 17.6 16.6 16.6 15.8 MEAN DAILY TEMP. (MDT) (C) 4.6 5.9 15.5 17.3 22.1 25.8 28.9 24.8 21.1 18.8 8.3 8.3 16.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.5 11.0 59.0 145.5 244.0 119.0 30.0 1.5 0.0 0.0 610.5 HEATING DEG. DAYS(BASE 18 0C) 415.0 339.5 86.0 56.5 5.5 0.0 0.0 0.0 9.0 12.5 290.5 300.5 1515.0 DEWPOINT (MEAN C) -3.4 -3.5 0.7 0.3 2.6 0.3 4.7 0.9 -0.5 1.3 -5.1 -4.7 -0.5 MIXING RATIO (G/KG) 3.76 3.64 4.85 4.89 5.81 4.78 6.50 5.02 4.46 5.05 3.51 3.29 4.63 VAPOUR PRESSURE (HPA) 5.14 4.97 6.60 6.65 7.88 6.49 8.77 6.81 6.07 6.89 4.80 4.51 6.30 SATURATION DEF. (HPA) 3.43 4.60 11.93 14.18 20.43 30.49 32.97 26.25 21.49 16.02 6.81 6.63 16.27 RELATIVE HUMIDITY (MEAN %) 63 57 41 37 31 20 24 23 25 34 44 45 37 RELATIVE HUMIDITY (MAX. %) 82 78 63 60 48 30 35 35 37 50 65 63 54 RELATIVE HUMIDITY (MIN. %) 42 35 23 19 16 11 14 14 15 21 25 26 22 RELATIVE HUMIDITY (MEAN% 03UTC) 74 74 59 53 42 27 32 31 35 43 61 59 49 RELATIVE HUMIDITY (MEAN% 09UTC) 49 40 26 24 20 12 15 16 17 23 27 29 25 RELATIVE HUMIDITY (MEAN% 15UTC) 64 50 35 30 26 15 19 18 21 31 40 44 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 41.5 6.1 22.0 34.5 8.8 0.0 0.0 0.0 0.0 4.3 1.0 2.5 120.7 DAYS WITH PRECIPITATION >=10 1 0 1 1 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 3 0 2 3 1 0 0 0 0 0 0 0 9 DAYS WITH PRECIPITATION >= 1 8 3 3 3 3 0 0 0 0 2 1 2 25 DAYS WITH PRECIPITATION 12 7 6 9 6 1 1 0 0 2 3 5 52 GREATEST DAILY PRECIPITATION 16.0 3.0 14.0 21.0 6.0 0.0 0.0 0.0 0.0 3.3 1.0 1.0 21.0 DAY 25 12 21 14 9 ** ** ** ** 28 4 27 DAY WITH THUNDER STORM 2 0 1 2 6 0 1 0 0 0 0 0 12 DAYS WITH SNOW OR SLEET 5 3 0 0 0 0 0 0 0 0 0 0 8 DAYS WITH DUST 1 1 6 2 5 2 2 2 1 1 1 0 24 WIND DIRECTION (PREVAILING) 270 270 270 270 90 90 90 90 90 135 135 90 90 PREVAILING WIND SPEED(KNOTS) 6.4 6.3 8.4 8.3 7.0 6.2 7.5 7.5 5.6 5.0 4.8 5.0 6.3 PREVAILING WIND PERCENT 11.3 15.7 24.2 15.8 21.9 28.0 40.9 33.5 23.3 17.8 15.1 12.6 19.7 CALMS PERCENT OF WIND 49.0 46.6 28.2 32.9 20.6 19.7 5.3 11.7 19.2 31.2 39.3 51.0 29.4 NO. OF WIND OBSERVATION 247 223 248 240 247 239 247 248 240 247 239 247 2912 VECTOR WIND DIRECTION (MEAN) 248 290 257 275 66 69 91 85 80 75 133 138 83 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.7 1.9 0.9 1.2 2.3 4.7 4.5 1.8 0.4 0.2 0.4 0.9 WIND STEADINESES (MEAN %) 9.7 21.2 37.3 18.4 22.2 42.6 66.2 71.4 37.5 9.5 6.3 14.3 19.6 WIND SPEED (MEAN KNOTS) 3.1 3.3 5.1 4.9 5.4 5.4 7.1 6.3 4.8 4.2 3.2 2.8 4.6 FASTEST WIND DIRECTION 170 330 240 300 300 50 90 70 290 310 20 210 240 FASTEST WIND SPEED (KNOTS) 20 15 22 20 20 18 18 20 18 20 14 15 22 DAY 25 2 15 14 7 11 23 6 18 29 8 2 DAYS WITH SKY CLEAR (0-2)/8 12 9 7 16 21 28 29 30 30 27 21 20 250 DAYS WITH P.CLOUDY (3-6)/8 10 10 18 9 9 2 2 1 0 4 8 11 84 DAYS WITH CLOUDY (7-8)/8 9 9 6 5 1 0 0 0 0 0 1 0 31 DAYS WITH VISIBILITY =< 2 KM 2 2 2 0 0 0 1 2 1 0 0 0 10 DURATION OF SUNSHINE HOURS 156.0 146.9 197.7 262.5 308.6 354.2 367.2 361.3 324.6 291.4 233.5 221.6 3225.5 ======================================================================================================================= 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 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.2 856.6 854.0 853.6 852.8 850.4 848.1 851.2 854.6 857.0 858.3 857.6 854.2 MAX. QFE PRESSURE IN HPA 862.6 863.7 861.1 858.2 859.3 856.7 851.7 857.3 861.4 862.2 865.3 863.0 865.3 DAY-HOUR 9- 6 3- 6 3- 6 28-21 22- 3 2-18 1-18 31- 6 14- 3 5- 6 23- 6 22- 6 MIN. QFE PRESSURE IN HPA 844.0 850.6 843.2 846.0 845.0 845.0 843.7 844.1 847.2 849.6 851.7 850.7 843.2 DAY-HOUR 25- 3 14-12 24- 0 18- 0 2-12 16-21 23-12 8-12 12- 0 29- 3 9-12 14-12 MEAN QNH PRESSURE IN HPA 1024.2 1024.7 1021.6 1021.2 1020.2 1017.4 1014.9 1018.4 1022.3 1025.1 1026.6 1025.9 1021.9 MAX. QNH PRESSURE IN HPA 1031.6 1032.9 1029.9 1026.5 1027.8 1024.8 1019.0 1025.5 1030.2 1031.1 1034.7 1032.1 1034.7 DAY-HOUR 9- 6 3- 6 3- 6 28-21 22- 3 2-18 1-18 31- 6 14- 3 5- 6 23- 6 22- 6 MIN. QNH PRESSURE IN HPA 1010.1 1017.7 1009.2 1012.4 1011.2 1011.2 1009.7 1010.2 1013.8 1016.6 1019.0 1017.8 1009.2 DAY-HOUR 25- 3 14-12 24- 0 18- 0 2-12 16-21 23-12 8-12 12- 0 29- 3 9-12 14-12 MEAN QFF PRESSURE IN HPA 1025.3 1024.8 1015.3 1013.7 1009.8 1004.5 1000.4 1006.4 1012.4 1016.8 1025.4 1024.7 1015.0 MAX. QFF PRESSURE IN HPA 1036.6 1037.1 1026.2 1022.7 1020.6 1016.0 1006.1 1015.0 1027.2 1023.4 1036.1 1034.2 1037.1 DAY-HOUR 9-15 4- 3 3- 6 15- 3 12-18 2-18 14- 3 31- 3 14- 3 31-18 19- 3 12- 3 MIN. QFF PRESSURE IN HPA 1005.9 1014.2 999.3 1002.9 1000.5 996.0 994.0 995.4 1001.0 1008.6 1012.2 1013.7 994.0 DAY-HOUR 25- 3 22- 0 24- 0 13- 0 28-12 15-21 23-12 8-12 12- 0 29- 0 9-12 14-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 855.9 856.4 853.6 853.3 852.7 850.4 848.4 851.3 854.6 856.8 858.2 857.6 854.1 MAX. QFE PRESSURE IN HPA 861.0 862.4 858.9 858.0 858.4 856.0 851.1 855.7 860.6 860.7 863.8 861.5 863.8 DAY 9 4 3 29 22 3 1 31 14 6 25 23 MIN. QFE PRESSURE IN HPA 844.6 851.6 843.2 846.0 847.2 845.5 846.0 846.3 847.2 849.7 853.5 851.8 843.2 DAY 25 14 24 18 2 17 18 8 12 29 10 15 MEAN QNH PRESSURE IN HPA 1023.9 1024.4 1021.1 1020.8 1020.2 1017.4 1015.2 1018.5 1022.3 1024.9 1026.5 1025.8 1021.8 MAX. QNH PRESSURE IN HPA 1029.8 1031.4 1027.3 1026.3 1026.7 1024.0 1018.3 1023.6 1029.3 1029.4 1033.0 1030.3 1033.0 DAY 9 4 3 29 22 3 1 31 14 6 25 23 MIN. QNH PRESSURE IN HPA 1010.8 1018.9 1009.2 1012.4 1013.8 1011.8 1012.4 1012.7 1013.8 1016.7 1021.1 1019.1 1009.2 DAY 25 14 24 18 2 17 18 8 12 29 10 15 MEAN QFF PRESSURE IN HPA 1024.2 1024.2 1014.5 1013.2 1009.9 1005.0 1000.7 1006.3 1012.4 1016.4 1024.7 1024.0 1014.6 MAX. QFF PRESSURE IN HPA 1032.9 1034.9 1022.9 1020.5 1019.0 1015.3 1005.2 1012.6 1024.5 1019.9 1033.5 1030.5 1034.9 DAY 13 4 3 29 13 3 14 31 14 6 20 11 MIN. QFF PRESSURE IN HPA 1006.1 1014.2 999.3 1002.9 1001.3 997.0 996.8 998.6 1001.0 1008.6 1014.3 1015.3 996.8 DAY 25 22 24 13 20 17 6 8 12 29 10 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 856.2 856.7 854.4 854.1 853.6 851.2 848.9 852.0 855.3 857.4 858.9 858.1 854.7 MAX. QFE PRESSURE IN HPA 860.9 862.4 859.7 858.0 859.3 856.5 851.4 856.9 861.4 861.4 864.5 861.7 864.5 DAY 1 4 3 23 22 3 26 31 14 5 24 23 MIN. QFE PRESSURE IN HPA 844.0 851.5 846.2 847.5 848.1 847.0 846.6 847.0 849.2 849.6 854.1 852.6 844.0 DAY 25 14 24 13 2 16 18 8 12 29 10 14 MEAN QNH PRESSURE IN HPA 1024.2 1024.8 1022.1 1021.8 1021.2 1018.4 1015.8 1019.4 1023.1 1025.6 1027.3 1026.4 1022.5 MAX. QNH PRESSURE IN HPA 1029.6 1031.4 1028.2 1026.3 1027.8 1024.5 1018.6 1025.0 1030.2 1030.2 1033.8 1030.6 1033.8 DAY 1 4 3 23 22 3 26 31 14 5 24 23 MIN. QNH PRESSURE IN HPA 1010.1 1018.8 1012.6 1014.1 1014.8 1013.6 1013.1 1013.6 1016.1 1016.6 1021.8 1020.0 1010.1 DAY 25 14 24 13 2 16 18 8 12 29 10 14 MEAN QFF PRESSURE IN HPA 1026.6 1026.3 1017.0 1015.4 1011.5 1006.0 1002.0 1008.1 1014.6 1018.8 1027.7 1026.9 1016.7 MAX. QFF PRESSURE IN HPA 1036.6 1037.1 1025.8 1022.7 1020.1 1015.5 1006.1 1015.0 1027.2 1022.3 1036.1 1034.2 1037.1 DAY 1 4 25 15 13 3 14 31 14 16 19 12 MIN. QFF PRESSURE IN HPA 1005.9 1016.4 1005.7 1004.5 1002.7 998.2 998.3 1000.7 1004.4 1010.2 1016.8 1019.0 998.2 DAY 25 22 24 13 20 16 23 8 12 29 10 14 ======================================================================================================================= 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 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 857.1 857.5 855.2 854.7 853.8 851.2 848.9 852.1 855.7 858.0 859.6 859.0 855.3 MAX. QFE PRESSURE IN HPA 862.6 863.7 861.1 858.1 858.7 856.7 851.6 857.3 861.0 862.2 865.3 863.0 865.3 DAY 9 3 3 23 22 3 26 31 14 5 23 22 MIN. QFE PRESSURE IN HPA 845.7 852.0 850.5 847.8 848.1 847.5 845.9 846.9 850.5 850.9 854.5 853.8 845.7 DAY 25 14 24 13 2 16 18 8 12 29 9 14 MEAN QNH PRESSURE IN HPA 1025.2 1025.8 1023.1 1022.4 1021.4 1018.4 1015.8 1019.5 1023.6 1026.3 1028.1 1027.5 1023.1 MAX. QNH PRESSURE IN HPA 1031.6 1032.9 1029.9 1026.4 1027.1 1024.8 1018.9 1025.5 1029.8 1031.1 1034.7 1032.1 1034.7 DAY 9 3 3 23 22 3 26 31 14 5 23 22 MIN. QNH PRESSURE IN HPA 1012.1 1019.3 1017.6 1014.5 1014.8 1014.1 1012.3 1013.4 1017.6 1018.1 1022.2 1021.4 1012.1 DAY 25 14 24 13 2 16 18 8 12 29 9 14 MEAN QFF PRESSURE IN HPA 1026.8 1026.2 1016.7 1014.8 1010.7 1005.3 1001.4 1007.4 1013.4 1017.7 1026.8 1026.7 1016.2 MAX. QFF PRESSURE IN HPA 1035.8 1036.4 1026.2 1022.0 1019.5 1015.6 1005.7 1014.8 1025.5 1021.6 1035.9 1033.4 1036.4 DAY 9 3 3 15 12 3 14 31 14 31 19 12 MIN. QFF PRESSURE IN HPA 1009.2 1018.0 1009.8 1004.7 1002.6 998.3 996.6 999.6 1004.7 1009.5 1015.5 1019.4 996.6 DAY 25 22 23 13 20 16 6 8 11 29 9 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 856.3 856.9 854.1 853.8 852.8 850.4 847.9 850.9 854.3 856.8 858.1 857.4 854.1 MAX. QFE PRESSURE IN HPA 861.3 862.8 858.3 856.7 857.6 855.8 850.7 855.9 859.2 860.7 863.7 861.2 863.7 DAY 9 3 3 23 12 3 26 31 14 5 23 18 MIN. QFE PRESSURE IN HPA 846.5 852.0 850.0 848.2 846.7 847.1 845.6 845.7 849.4 850.0 852.8 851.6 845.6 DAY 25 15 20 17 2 14 18 8 12 29 9 31 MEAN QNH PRESSURE IN HPA 1024.3 1025.0 1021.8 1021.4 1020.2 1017.5 1014.6 1018.1 1022.0 1024.9 1026.4 1025.6 1021.8 MAX. QNH PRESSURE IN HPA 1030.1 1031.8 1026.6 1024.8 1025.8 1023.7 1017.8 1023.9 1027.7 1029.4 1032.9 1030.0 1032.9 DAY 9 3 3 23 12 3 26 31 14 5 23 18 MIN. QNH PRESSURE IN HPA 1013.0 1019.3 1017.0 1014.9 1013.2 1013.7 1011.9 1012.1 1016.3 1017.0 1020.3 1018.9 1011.9 DAY 25 15 20 17 2 14 18 8 12 29 9 31 MEAN QFF PRESSURE IN HPA 1024.3 1024.2 1014.6 1013.4 1009.3 1003.9 999.5 1005.5 1011.3 1015.7 1024.0 1023.1 1014.1 MAX. QFF PRESSURE IN HPA 1032.7 1034.6 1023.9 1020.6 1018.7 1013.9 1004.1 1012.7 1022.3 1019.1 1032.8 1029.2 1034.6 DAY 9 3 25 15 12 3 14 31 14 5 19 9 MIN. QFF PRESSURE IN HPA 1009.2 1016.6 1008.4 1007.0 1001.2 998.1 995.0 997.5 1003.1 1008.7 1012.9 1015.5 995.0 DAY 25 21 21 13 29 16 6 8 11 29 9 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.4 855.7 852.8 852.6 851.4 849.2 846.8 849.7 853.2 855.8 857.1 856.4 853.0 MAX. QFE PRESSURE IN HPA 861.3 861.9 856.5 855.8 856.5 854.8 850.4 854.1 858.0 859.7 862.6 860.0 862.6 DAY 9 3 2 25 12 2 26 31 13 5 24 22 MIN. QFE PRESSURE IN HPA 846.4 850.6 848.3 847.5 845.0 845.4 843.7 844.1 847.8 849.9 851.7 850.7 843.7 DAY 25 14 23 17 2 22 23 8 11 29 9 14 MEAN QNH PRESSURE IN HPA 1023.3 1023.6 1020.3 1020.0 1018.7 1016.1 1013.3 1016.7 1020.7 1023.8 1025.2 1024.5 1020.5 MAX. QNH PRESSURE IN HPA 1030.1 1030.8 1024.5 1023.7 1024.5 1022.6 1017.5 1021.8 1026.3 1028.2 1031.6 1028.6 1031.6 DAY 9 3 2 25 12 2 26 31 13 5 24 22 MIN. QNH PRESSURE IN HPA 1012.9 1017.7 1015.1 1014.1 1011.2 1011.7 1009.7 1010.2 1014.5 1016.9 1019.0 1017.8 1009.7 DAY 25 14 23 17 2 22 23 8 11 29 9 14 MEAN QFF PRESSURE IN HPA 1023.7 1023.1 1013.6 1012.4 1008.4 1003.5 998.7 1004.4 1010.6 1015.2 1023.4 1022.5 1013.3 MAX. QFF PRESSURE IN HPA 1032.4 1033.1 1022.1 1018.7 1017.9 1013.3 1003.5 1010.6 1019.8 1018.6 1033.6 1028.7 1033.6 DAY 9 3 25 15 12 2 14 31 14 5 19 9 MIN. QFF PRESSURE IN HPA 1009.5 1015.7 1006.0 1006.4 1000.5 996.8 994.0 995.4 1002.2 1008.9 1012.2 1013.7 994.0 DAY 25 9 23 17 28 16 23 8 11 29 9 14 ======================================================================================================================= 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 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.1 856.2 853.3 852.8 851.7 849.4 847.0 850.1 853.6 856.4 857.7 857.1 853.5 MAX. QFE PRESSURE IN HPA 862.3 862.8 857.3 856.3 857.0 855.8 850.5 854.8 859.7 860.0 862.6 860.6 862.8 DAY 9 3 2 28 12 3 26 31 13 5 23 22 MIN. QFE PRESSURE IN HPA 850.9 850.6 846.8 847.0 847.3 845.1 844.1 844.5 847.8 850.1 852.1 851.3 844.1 DAY 28 14 23 13 2 15 22 8 11 29 9 14 MEAN QNH PRESSURE IN HPA 1024.1 1024.2 1020.8 1020.3 1019.0 1016.3 1013.6 1017.2 1021.2 1024.4 1026.0 1025.3 1021.0 MAX. QNH PRESSURE IN HPA 1031.3 1031.8 1025.5 1024.3 1025.1 1023.7 1017.6 1022.6 1028.2 1028.6 1031.6 1029.3 1031.8 DAY 9 3 2 28 12 3 26 31 13 5 23 22 MIN. QNH PRESSURE IN HPA 1018.1 1017.7 1013.3 1013.6 1013.9 1011.4 1010.2 1010.7 1014.5 1017.1 1019.5 1018.5 1010.2 DAY 28 14 23 13 2 15 22 8 11 29 9 14 MEAN QFF PRESSURE IN HPA 1026.5 1025.4 1015.6 1013.9 1009.2 1003.8 999.7 1005.9 1012.5 1017.5 1026.2 1025.6 1015.2 MAX. QFF PRESSURE IN HPA 1036.6 1036.7 1023.3 1020.4 1019.4 1014.4 1004.3 1012.6 1023.6 1020.9 1034.8 1032.2 1036.7 DAY 9 3 25 15 12 3 26 31 14 31 19 12 MIN. QFF PRESSURE IN HPA 1012.6 1017.2 1004.7 1005.0 1002.7 996.6 995.4 997.2 1003.6 1011.1 1013.7 1016.1 995.4 DAY 23 14 23 13 28 16 22 8 11 29 9 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 856.4 856.9 854.4 854.1 853.2 850.8 848.8 851.9 855.1 857.4 858.7 857.9 854.6 MAX. QFE PRESSURE IN HPA 862.5 862.8 858.7 857.9 858.6 856.7 851.7 856.4 861.2 861.2 864.3 861.7 864.3 DAY 9 3 2 28 17 2 1 31 13 5 23 22 MIN. QFE PRESSURE IN HPA 849.7 851.1 845.5 847.3 848.1 845.7 846.2 847.2 848.8 851.0 853.6 851.8 845.5 DAY 30 14 23 13 19 16 29 8 11 29 9 31 MEAN QNH PRESSURE IN HPA 1024.5 1025.0 1022.1 1021.7 1020.7 1017.9 1015.6 1019.2 1023.0 1025.6 1027.1 1026.2 1022.4 MAX. QNH PRESSURE IN HPA 1031.5 1031.8 1027.1 1026.2 1027.0 1024.8 1019.0 1024.4 1030.0 1030.0 1033.6 1030.6 1033.6 DAY 9 3 2 28 17 2 1 31 13 5 23 22 MIN. QNH PRESSURE IN HPA 1016.7 1018.3 1011.8 1013.9 1014.8 1012.1 1012.6 1013.8 1015.6 1018.2 1021.2 1019.1 1011.8 DAY 30 14 23 13 19 16 29 8 11 29 9 31 MEAN QFF PRESSURE IN HPA 1026.1 1025.3 1015.7 1014.1 1009.9 1004.8 1001.2 1007.3 1012.8 1017.2 1025.7 1025.4 1015.4 MAX. QFF PRESSURE IN HPA 1035.5 1036.3 1023.9 1021.1 1020.6 1016.0 1005.6 1013.9 1024.7 1023.4 1034.7 1032.2 1036.3 DAY 9 3 24 14 12 2 31 31 13 31 19 10 MIN. QFF PRESSURE IN HPA 1012.1 1017.5 1001.7 1004.8 1002.4 996.9 997.3 999.4 1002.1 1010.2 1014.0 1015.3 996.9 DAY 23 14 23 13 19 16 22 8 11 29 9 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 856.1 856.7 854.1 853.4 853.0 850.5 848.5 851.8 854.9 857.1 858.4 857.7 854.3 MAX. QFE PRESSURE IN HPA 861.4 863.0 859.9 858.2 858.3 856.7 851.0 856.2 860.9 861.1 863.8 861.5 863.8 DAY 9 3 2 28 21 2 1 31 13 5 24 22 MIN. QFE PRESSURE IN HPA 847.2 852.0 844.2 847.1 847.9 845.0 846.0 847.5 848.4 850.2 853.6 851.4 844.2 DAY 30 8 23 13 19 16 29 7 11 28 9 14 MEAN QNH PRESSURE IN HPA 1024.0 1024.8 1021.8 1021.0 1020.5 1017.6 1015.3 1019.1 1022.7 1025.2 1026.8 1025.9 1022.1 MAX. QNH PRESSURE IN HPA 1030.2 1032.1 1028.5 1026.5 1026.6 1024.8 1018.2 1024.2 1029.6 1029.9 1033.0 1030.3 1033.0 DAY 9 3 2 28 21 2 1 31 13 5 24 22 MIN. QNH PRESSURE IN HPA 1013.8 1019.3 1010.3 1013.7 1014.6 1011.2 1012.4 1014.1 1015.2 1017.3 1021.2 1018.6 1010.3 DAY 30 8 23 13 19 16 29 7 11 28 9 14 MEAN QFF PRESSURE IN HPA 1024.1 1024.3 1014.6 1012.9 1009.5 1004.2 1000.3 1006.6 1012.1 1016.1 1024.4 1023.5 1014.4 MAX. QFF PRESSURE IN HPA 1032.9 1036.1 1023.8 1019.7 1019.7 1015.3 1004.2 1013.4 1024.3 1019.8 1032.6 1030.1 1036.1 DAY 12 3 2 28 12 2 13 31 13 15 19 10 MIN. QFF PRESSURE IN HPA 1008.9 1014.9 1000.2 1004.8 1001.9 996.0 996.9 999.8 1001.7 1009.0 1013.6 1014.5 996.0 DAY 24 8 23 12 19 15 5 8 11 28 9 27 ======================================================================================================================= 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 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.0 7.9 10.4 19.0 24.1 27.8 27.5 29.2 22.1 17.2 11.6 5.9 17.2 MINIMUN AIR TEMPERATURE (C) -1.9 0.8 3.8 10.6 14.9 18.5 19.8 20.5 12.8 7.7 2.9 -1.1 9.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 2 8 10 19 0 0 0 0 40 DAYS WITH MINIMUM TEMP. <=-4 9 1 0 0 0 0 0 0 0 0 0 11 21 DAYS WITH FREEZING MIN.<= 0 23 13 5 0 0 0 0 0 0 1 3 21 66 TEMPERATURE RECORDS LOWEST(C) -9.0 -6.0 -2.0 5.0 10.0 13.0 15.0 16.0 5.0 0.0 -2.0 -7.0 -9.0 DAY 30 2 15 14 1 7 10 14 21 27 8 17 MAXIMUM AIR TEMPERATURE (C) 11.4 15.9 17.8 27.0 32.2 35.8 34.9 37.2 31.3 27.5 22.4 14.6 25.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 9 22 30 31 31 22 15 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) 18.0 21.0 26.0 32.0 39.0 40.0 40.0 42.0 36.0 35.0 27.0 23.0 42.0 DAY 7 10 31 19 31 1 1 8 5 2 5 6 DIF. BETWEEN (MAX.-MIN.) (C) 13.3 15.1 14.0 16.4 17.3 17.3 15.1 16.7 18.5 19.8 19.5 15.7 16.6 MEAN DAILY TEMP. (MDT) (C) 4.7 8.4 10.8 18.8 23.5 27.1 27.4 28.9 22.0 17.6 12.7 6.8 17.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 8.5 92.0 184.5 197.0 243.5 62.0 6.0 0.0 0.0 793.5 HEATING DEG. DAYS(BASE 18 0C) 411.5 270.0 224.0 22.0 0.0 0.0 0.0 0.0 9.5 60.5 160.0 348.5 1506.0 DEWPOINT (MEAN C) -3.9 -2.4 -0.8 -0.7 -1.1 -1.1 2.6 4.2 -2.4 -3.7 -5.2 -5.4 -1.7 MIXING RATIO (G/KG) 3.48 3.91 4.41 4.44 4.41 4.41 5.61 6.28 3.91 3.54 3.18 3.15 4.23 VAPOUR PRESSURE (HPA) 4.75 5.34 6.01 6.05 6.00 5.98 7.58 8.47 5.32 4.84 4.37 4.31 5.75 SATURATION DEF. (HPA) 3.88 6.02 7.52 17.25 26.37 33.71 30.82 34.34 23.50 17.20 10.79 6.05 18.12 RELATIVE HUMIDITY (MEAN %) 60 53 52 30 23 16 22 22 21 27 33 47 34 RELATIVE HUMIDITY (MAX. %) 80 77 78 50 37 24 31 31 31 41 45 64 49 RELATIVE HUMIDITY (MIN. %) 38 31 29 15 11 10 14 14 13 15 20 28 20 RELATIVE HUMIDITY (MEAN% 03UTC) 75 71 68 45 34 22 29 29 30 36 42 60 45 RELATIVE HUMIDITY (MEAN% 09UTC) 43 35 35 17 13 11 16 15 14 16 22 30 22 RELATIVE HUMIDITY (MEAN% 15UTC) 54 43 42 23 18 14 17 18 18 24 33 44 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 15.3 19.7 50.7 11.5 8.0 0.0 0.3 0.0 0.0 5.0 0.0 6.6 117.1 DAYS WITH PRECIPITATION >=10 0 1 2 0 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 2 2 3 1 1 0 0 0 0 0 0 1 10 DAYS WITH PRECIPITATION >= 1 4 4 9 3 2 0 0 0 0 2 0 1 25 DAYS WITH PRECIPITATION 8 8 16 7 4 0 2 0 0 2 0 3 50 GREATEST DAILY PRECIPITATION 6.0 10.0 14.0 5.0 6.0 0.0 0.3 0.0 0.0 4.0 0.0 6.0 14.0 DAY 13 24 7 13 3 ** 6 ** ** 25 ** 15 DAY WITH THUNDER STORM 0 2 3 3 2 0 1 0 0 0 0 1 12 DAYS WITH SNOW OR SLEET 4 0 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH DUST 2 0 1 3 2 7 3 7 4 0 0 0 29 WIND DIRECTION (PREVAILING) 90 90 90 90 90 90 90 90 90 135 90 90 90 PREVAILING WIND SPEED(KNOTS) 5.8 4.9 6.1 5.6 5.8 7.9 8.3 7.0 7.7 5.1 4.6 4.8 6.6 PREVAILING WIND PERCENT 18.1 17.5 24.7 17.2 19.8 38.9 37.1 40.5 39.3 21.1 20.5 16.2 25.8 CALMS PERCENT OF WIND 42.3 31.4 20.6 21.8 18.6 5.9 2.8 4.0 11.7 17.8 25.9 25.1 18.9 NO. OF WIND OBSERVATION 248 223 247 239 247 239 248 247 239 247 239 247 2910 VECTOR WIND DIRECTION (MEAN) 105 311 54 113 35 90 81 81 87 147 156 192 88 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.3 0.7 0.4 0.7 4.1 4.8 4.5 3.8 0.8 0.5 0.7 1.6 WIND STEADINESES (MEAN %) 20.6 7.3 14.3 8.7 14.3 57.7 62.3 65.2 59.4 17.0 13.2 16.3 30.8 WIND SPEED (MEAN KNOTS) 3.4 4.1 4.9 4.6 4.9 7.1 7.7 6.9 6.4 4.7 3.8 4.3 5.2 FASTEST WIND DIRECTION 120 300 270 180 30 90 80 130 110 360 300 300 130 FASTEST WIND SPEED (KNOTS) 20 18 25 15 15 15 20 28 25 18 12 20 28 DAY 22 5 16 23 4 4 6 30 16 12 3 15 DAYS WITH SKY CLEAR (0-2)/8 17 17 13 16 27 30 26 30 30 29 26 19 280 DAYS WITH P.CLOUDY (3-6)/8 12 9 12 11 4 0 5 1 0 1 4 11 70 DAYS WITH CLOUDY (7-8)/8 2 2 6 3 0 0 0 0 0 1 0 1 15 DAYS WITH VISIBILITY =< 2 KM 2 0 2 0 1 1 1 5 0 0 0 0 12 DURATION OF SUNSHINE HOURS 197.0 207.4 213.1 244.3 341.3 348.6 322.3 322.1 309.7 302.6 265.3 220.7 3294.4 ======================================================================================================================= 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 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 855.2 855.1 853.9 854.9 852.1 849.6 848.2 848.2 852.3 856.2 858.8 857.1 853.5 MAX. QFE PRESSURE IN HPA 864.5 861.1 859.7 859.1 858.6 854.1 853.1 853.4 858.5 862.6 865.4 865.8 865.8 DAY-HOUR 3- 6 9- 6 26- 6 27- 6 23- 6 5-18 9- 3 30- 3 27-18 12- 6 14-18 30- 6 MIN. QFE PRESSURE IN HPA 845.9 845.8 848.7 848.3 847.6 844.2 843.2 843.5 845.2 848.8 852.9 846.4 843.2 DAY-HOUR 23- 0 23-12 24-15 19-15 7-12 30-15 1-15 7-15 1-12 8-12 30-12 14-15 MEAN QNH PRESSURE IN HPA 1023.0 1023.0 1021.6 1022.7 1019.5 1016.6 1014.9 1014.9 1019.6 1024.2 1027.3 1025.2 1021.0 MAX. QNH PRESSURE IN HPA 1033.8 1029.9 1028.2 1027.6 1027.0 1021.8 1020.6 1021.0 1026.9 1031.6 1034.8 1035.3 1035.3 DAY-HOUR 3- 6 9- 6 26- 6 27- 6 23- 6 5-18 9- 3 30- 3 27-18 12- 6 14-18 30- 6 MIN. QNH PRESSURE IN HPA 1012.3 1012.2 1015.5 1015.1 1014.3 1010.3 1009.2 1009.5 1011.5 1015.6 1020.4 1012.9 1009.2 DAY-HOUR 23- 0 23-12 24-15 19-15 7-12 30-15 1-15 7-15 1-12 8-12 30-12 14-15 MEAN QFF PRESSURE IN HPA 1023.9 1021.3 1018.3 1014.2 1008.0 1003.0 1001.3 1000.3 1009.4 1016.9 1023.4 1025.0 1013.8 MAX. QFF PRESSURE IN HPA 1036.9 1032.2 1025.8 1022.2 1016.6 1010.5 1008.4 1007.7 1020.9 1029.9 1034.8 1038.5 1038.5 DAY-HOUR 3- 6 4- 3 26- 6 28- 3 10- 3 6- 3 9- 3 30- 3 22- 3 27- 3 15- 3 16- 3 MIN. QFF PRESSURE IN HPA 1008.6 1008.7 1008.8 1001.6 999.8 996.1 993.6 993.1 998.9 1004.0 1015.4 1007.2 993.1 DAY-HOUR 23- 0 23-12 24- 9 19-21 31-15 30-15 16-12 7-12 1-12 9- 0 9-12 14-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 854.9 854.8 853.6 854.7 852.0 849.9 848.3 848.6 852.3 856.0 858.8 856.8 853.4 MAX. QFE PRESSURE IN HPA 862.6 860.4 858.0 857.6 857.2 853.1 852.4 852.5 857.4 861.9 865.0 864.3 865.0 DAY 3 4 27 27 23 5 9 30 22 28 15 31 MIN. QFE PRESSURE IN HPA 845.9 848.2 849.5 848.5 849.1 845.8 845.4 845.6 846.9 849.0 855.0 848.8 845.4 DAY 23 24 7 20 8 10 16 7 6 9 30 15 MEAN QNH PRESSURE IN HPA 1022.8 1022.6 1021.1 1022.5 1019.4 1016.9 1015.0 1015.4 1019.7 1024.0 1027.3 1024.9 1021.0 MAX. QNH PRESSURE IN HPA 1031.6 1029.1 1026.3 1025.8 1025.4 1020.6 1019.8 1019.9 1025.6 1030.8 1034.4 1033.6 1034.4 DAY 3 4 27 27 23 5 9 30 22 28 15 31 MIN. QNH PRESSURE IN HPA 1012.3 1014.9 1016.4 1015.3 1016.0 1012.2 1011.7 1011.9 1013.4 1015.9 1022.8 1015.6 1011.7 DAY 23 24 7 20 8 10 16 7 6 9 30 15 MEAN QFF PRESSURE IN HPA 1022.9 1020.4 1017.6 1014.0 1008.1 1003.6 1001.4 1000.8 1009.2 1016.4 1022.9 1024.2 1013.5 MAX. QFF PRESSURE IN HPA 1033.5 1030.4 1023.5 1021.0 1015.2 1009.5 1007.8 1006.6 1018.8 1027.6 1032.0 1036.4 1036.4 DAY 3 4 27 14 23 6 9 14 22 28 15 16 MIN. QFF PRESSURE IN HPA 1008.6 1011.1 1009.1 1002.2 1002.8 997.0 996.3 995.6 1000.7 1004.0 1018.1 1010.8 995.6 DAY 23 23 24 20 30 10 16 7 12 9 10 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 855.4 855.4 854.1 855.6 852.9 850.5 848.9 849.2 852.9 856.9 859.5 857.4 854.1 MAX. QFE PRESSURE IN HPA 863.4 860.9 858.6 858.9 858.2 853.4 853.1 853.4 858.1 862.4 865.1 865.1 865.1 DAY 3 4 26 28 23 6 9 30 22 30 15 31 MIN. QFE PRESSURE IN HPA 847.3 848.4 849.5 849.7 849.7 846.0 846.2 846.1 847.9 849.9 855.3 850.1 846.0 DAY 28 23 7 20 25 10 16 7 6 9 30 15 MEAN QNH PRESSURE IN HPA 1023.3 1023.3 1021.8 1023.6 1020.4 1017.6 1015.8 1016.1 1020.4 1025.0 1028.0 1025.6 1021.7 MAX. QNH PRESSURE IN HPA 1032.5 1029.6 1027.0 1027.3 1026.5 1021.0 1020.6 1021.0 1026.4 1031.4 1034.5 1034.5 1034.5 DAY 3 4 26 28 23 6 9 30 22 30 15 31 MIN. QNH PRESSURE IN HPA 1013.9 1015.2 1016.4 1016.7 1016.7 1012.4 1012.6 1012.5 1014.6 1016.9 1023.2 1017.1 1012.4 DAY 28 23 7 20 25 10 16 7 6 9 30 15 MEAN QFF PRESSURE IN HPA 1025.3 1022.9 1019.4 1016.1 1009.7 1004.5 1002.5 1002.3 1011.2 1019.2 1025.9 1026.8 1015.5 MAX. QFF PRESSURE IN HPA 1036.8 1032.2 1025.6 1022.2 1016.6 1010.5 1008.4 1007.7 1020.9 1029.9 1034.8 1038.5 1038.5 DAY 3 4 26 28 10 6 9 30 22 27 15 16 MIN. QFF PRESSURE IN HPA 1012.9 1012.8 1009.0 1004.3 1003.9 997.7 997.9 996.6 1003.6 1006.9 1020.4 1013.1 996.6 DAY 28 23 24 20 30 10 1 7 6 9 30 14 ======================================================================================================================= 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 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 856.6 856.4 855.1 856.1 853.2 850.5 849.0 849.1 853.2 857.3 860.2 858.5 854.6 MAX. QFE PRESSURE IN HPA 864.5 861.1 859.7 859.1 858.6 853.5 853.0 853.2 858.4 862.6 865.4 865.8 865.8 DAY 3 9 26 27 23 17 9 30 27 12 15 30 MIN. QFE PRESSURE IN HPA 849.1 849.1 850.3 851.2 849.7 846.3 845.7 846.5 848.2 850.7 855.8 852.0 845.7 DAY 12 23 7 20 7 10 16 7 1 9 30 14 MEAN QNH PRESSURE IN HPA 1024.7 1024.4 1022.9 1024.1 1020.7 1017.6 1015.9 1016.0 1020.8 1025.5 1028.8 1026.8 1022.4 MAX. QNH PRESSURE IN HPA 1033.8 1029.9 1028.2 1027.6 1027.0 1021.1 1020.5 1020.7 1026.7 1031.6 1034.8 1035.3 1035.3 DAY 3 9 26 27 23 17 9 30 27 12 15 30 MIN. QNH PRESSURE IN HPA 1016.0 1016.0 1017.4 1018.4 1016.7 1012.7 1012.1 1013.0 1014.9 1017.8 1023.7 1019.3 1012.1 DAY 12 23 7 20 7 10 16 7 1 9 30 14 MEAN QFF PRESSURE IN HPA 1026.0 1023.1 1019.7 1015.4 1009.0 1003.9 1002.3 1001.2 1010.3 1017.9 1024.9 1026.9 1015.1 MAX. QFF PRESSURE IN HPA 1036.9 1031.1 1025.8 1021.8 1016.0 1010.3 1008.4 1007.2 1019.6 1029.3 1033.2 1038.3 1038.3 DAY 3 2 26 27 10 6 9 30 22 27 15 16 MIN. QFF PRESSURE IN HPA 1014.8 1012.8 1010.6 1006.0 1002.5 997.5 996.6 995.8 1002.1 1006.5 1019.9 1012.7 995.8 DAY 23 23 24 20 31 10 1 7 6 9 11 14 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.1 855.3 854.2 855.1 852.4 849.7 848.2 848.0 852.0 855.9 858.7 856.8 853.4 MAX. QFE PRESSURE IN HPA 862.3 859.5 858.3 858.3 857.5 853.0 851.8 851.8 857.3 861.3 863.9 864.4 864.4 DAY 3 4 26 27 23 5 9 30 27 12 15 30 MIN. QFE PRESSURE IN HPA 847.8 847.5 849.1 850.0 848.4 845.8 844.8 845.6 846.7 850.2 854.0 849.6 844.8 DAY 12 23 24 24 7 10 16 6 1 8 30 14 MEAN QNH PRESSURE IN HPA 1023.0 1023.2 1021.9 1022.9 1019.7 1016.6 1014.9 1014.8 1019.3 1023.8 1027.0 1024.9 1021.0 MAX. QNH PRESSURE IN HPA 1031.3 1028.0 1026.6 1026.6 1025.7 1020.5 1019.1 1019.1 1025.5 1030.1 1033.1 1033.7 1033.7 DAY 3 4 26 27 23 5 9 30 27 12 15 30 MIN. QNH PRESSURE IN HPA 1014.5 1014.1 1016.0 1017.0 1015.2 1012.2 1011.0 1011.9 1013.2 1017.3 1021.7 1016.6 1011.0 DAY 12 23 24 24 7 10 16 6 1 8 30 14 MEAN QFF PRESSURE IN HPA 1023.0 1020.7 1017.9 1013.8 1007.7 1002.6 1001.1 999.5 1008.5 1015.7 1022.0 1023.6 1013.0 MAX. QFF PRESSURE IN HPA 1032.1 1028.0 1023.8 1019.8 1015.5 1008.8 1006.7 1005.2 1017.5 1026.1 1030.3 1035.5 1035.5 DAY 3 4 26 27 10 6 9 30 22 27 15 16 MIN. QFF PRESSURE IN HPA 1013.2 1010.8 1008.8 1006.0 1000.8 996.9 995.5 994.5 1000.2 1005.8 1017.2 1009.1 994.5 DAY 12 23 24 20 31 10 16 7 12 9 9 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 854.2 853.9 852.9 853.6 850.9 848.4 847.0 846.6 850.8 854.9 857.6 856.0 852.2 MAX. QFE PRESSURE IN HPA 860.8 858.2 856.8 857.1 855.8 851.9 850.6 850.3 856.5 860.2 863.5 863.6 863.6 DAY 3 7 26 27 23 5 22 30 27 29 14 30 MIN. QFE PRESSURE IN HPA 847.7 845.8 848.8 849.0 847.6 845.0 843.2 843.8 845.2 848.8 852.9 847.4 843.2 DAY 28 23 24 19 7 9 16 7 1 8 30 14 MEAN QNH PRESSURE IN HPA 1021.9 1021.5 1020.4 1021.2 1018.1 1015.2 1013.5 1013.1 1018.0 1022.7 1025.8 1024.0 1019.6 MAX. QNH PRESSURE IN HPA 1029.5 1026.5 1024.9 1025.2 1023.7 1019.2 1017.7 1017.4 1024.5 1028.8 1032.6 1032.8 1032.8 DAY 3 7 26 27 23 5 22 30 27 29 14 30 MIN. QNH PRESSURE IN HPA 1014.4 1012.2 1015.6 1015.9 1014.3 1011.2 1009.2 1009.9 1011.5 1015.6 1020.4 1014.0 1009.2 DAY 28 23 24 19 7 9 16 7 1 8 30 14 MEAN QFF PRESSURE IN HPA 1022.0 1019.3 1016.7 1012.7 1006.8 1001.7 999.9 998.3 1007.4 1015.0 1021.3 1023.2 1012.0 MAX. QFF PRESSURE IN HPA 1030.3 1025.9 1021.9 1019.7 1013.6 1008.0 1005.3 1004.2 1017.4 1024.9 1029.7 1033.7 1033.7 DAY 3 4 26 13 10 6 22 13 22 25 14 16 MIN. QFF PRESSURE IN HPA 1012.9 1008.7 1009.3 1005.4 999.9 996.7 993.6 993.1 998.9 1005.3 1015.4 1007.8 993.1 DAY 22 23 23 19 31 10 16 7 1 9 9 14 ======================================================================================================================= 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 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 854.8 854.5 853.3 853.7 851.0 848.4 847.0 846.8 851.3 855.5 858.2 856.6 852.6 MAX. QFE PRESSURE IN HPA 862.3 858.7 857.3 857.6 855.8 851.9 850.7 850.7 857.7 860.8 864.3 864.2 864.3 DAY 2 6 26 27 22 5 22 30 27 29 14 30 MIN. QFE PRESSURE IN HPA 847.9 846.5 848.7 848.3 847.6 844.2 843.2 843.5 845.5 849.0 853.4 846.4 843.2 DAY 22 23 24 19 31 30 1 7 1 8 30 14 MEAN QNH PRESSURE IN HPA 1022.6 1022.2 1020.8 1021.3 1018.2 1015.2 1013.6 1013.3 1018.5 1023.4 1026.5 1024.7 1020.0 MAX. QNH PRESSURE IN HPA 1031.3 1027.1 1025.5 1025.8 1023.7 1019.2 1017.8 1017.8 1025.9 1029.5 1033.6 1033.4 1033.6 DAY 2 6 26 27 22 5 22 30 27 29 14 30 MIN. QNH PRESSURE IN HPA 1014.6 1013.0 1015.5 1015.1 1014.3 1010.3 1009.2 1009.5 1011.8 1015.9 1021.0 1012.9 1009.2 DAY 22 23 24 19 31 30 1 7 1 8 30 14 MEAN QFF PRESSURE IN HPA 1024.6 1021.6 1018.3 1013.8 1007.4 1001.9 1000.3 999.5 1009.2 1017.4 1024.3 1025.8 1013.7 MAX. QFF PRESSURE IN HPA 1033.1 1027.5 1024.0 1020.3 1014.7 1008.4 1005.6 1005.2 1018.7 1027.6 1032.6 1036.5 1036.5 DAY 2 3 26 13 5 6 22 30 21 27 14 30 MIN. QFF PRESSURE IN HPA 1014.3 1011.4 1008.9 1004.9 999.8 996.1 994.1 993.3 1000.7 1007.4 1019.6 1007.2 993.3 DAY 22 23 24 19 31 30 1 7 1 8 30 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 855.4 855.6 854.3 855.3 852.5 849.9 848.6 848.6 852.9 856.7 859.1 857.5 853.9 MAX. QFE PRESSURE IN HPA 862.7 860.2 858.7 859.1 857.4 854.1 852.2 852.8 858.5 862.5 865.4 865.3 865.4 DAY 2 3 26 27 22 5 8 29 27 29 14 30 MIN. QFE PRESSURE IN HPA 847.8 848.1 850.8 848.4 849.3 845.9 845.2 845.5 847.5 849.5 854.8 847.3 845.2 DAY 27 23 6 19 31 9 16 6 5 8 30 14 MEAN QNH PRESSURE IN HPA 1023.3 1023.5 1022.0 1023.1 1019.9 1016.9 1015.4 1015.5 1020.3 1024.7 1027.6 1025.7 1021.5 MAX. QNH PRESSURE IN HPA 1031.7 1028.8 1027.1 1027.6 1025.6 1021.8 1019.6 1020.3 1026.9 1031.5 1034.8 1034.7 1034.8 DAY 2 3 26 27 22 5 8 29 27 29 14 30 MIN. QNH PRESSURE IN HPA 1014.5 1014.8 1018.0 1015.2 1016.2 1012.3 1011.5 1011.8 1014.1 1016.4 1022.6 1013.9 1011.5 DAY 27 23 6 19 31 9 16 6 5 8 30 14 MEAN QFF PRESSURE IN HPA 1024.6 1022.1 1018.7 1014.4 1008.1 1003.2 1001.8 1000.8 1010.0 1017.2 1023.8 1025.7 1014.2 MAX. QFF PRESSURE IN HPA 1033.3 1029.2 1024.9 1022.2 1014.5 1010.1 1007.5 1007.0 1019.2 1027.7 1032.7 1036.9 1036.9 DAY 2 7 26 27 10 5 8 14 21 26 14 30 MIN. QFF PRESSURE IN HPA 1013.2 1012.7 1012.2 1003.0 1000.9 997.3 995.7 994.7 1001.6 1005.6 1018.8 1008.3 994.7 DAY 27 23 24 19 31 30 1 7 5 8 10 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 855.1 855.4 854.1 855.1 852.2 849.9 848.5 848.7 852.7 856.6 858.8 857.0 853.7 MAX. QFE PRESSURE IN HPA 862.7 860.4 858.7 858.8 857.1 853.4 852.8 852.8 857.6 862.4 865.3 864.8 865.3 DAY 2 3 26 12 22 5 8 29 21 27 14 30 MIN. QFE PRESSURE IN HPA 846.0 848.1 850.4 848.3 849.0 845.7 845.6 845.5 847.2 849.3 853.0 847.7 845.5 DAY 27 23 6 19 24 9 16 6 5 8 30 14 MEAN QNH PRESSURE IN HPA 1022.9 1023.3 1021.8 1023.0 1019.5 1016.9 1015.3 1015.5 1020.2 1024.7 1027.2 1025.2 1021.3 MAX. QNH PRESSURE IN HPA 1031.7 1029.1 1027.1 1027.2 1025.2 1021.0 1020.3 1020.3 1025.8 1031.4 1034.7 1034.1 1034.7 DAY 2 3 26 12 22 5 8 29 21 27 14 30 MIN. QNH PRESSURE IN HPA 1012.4 1014.8 1017.5 1015.1 1015.9 1012.1 1011.9 1011.8 1013.8 1016.2 1020.5 1014.4 1011.8 DAY 27 23 6 19 24 9 16 6 5 8 30 14 MEAN QFF PRESSURE IN HPA 1022.9 1020.8 1017.9 1013.8 1007.6 1003.0 1001.3 1000.4 1009.3 1016.6 1022.4 1023.9 1013.3 MAX. QFF PRESSURE IN HPA 1033.1 1029.7 1024.2 1020.9 1014.0 1009.9 1007.8 1006.3 1018.7 1027.8 1031.5 1035.0 1035.0 DAY 2 3 26 27 22 5 8 14 21 27 14 30 MIN. QFF PRESSURE IN HPA 1009.1 1011.7 1011.2 1001.6 1001.8 997.0 996.8 994.8 1000.3 1004.6 1017.5 1008.3 994.8 DAY 22 23 19 19 30 9 1 6 11 8 30 14 ======================================================================================================================= 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 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.3 6.7 12.9 19.3 26.9 30.2 29.5 28.7 22.8 20.0 14.0 9.8 18.7 MINIMUN AIR TEMPERATURE (C) -4.4 0.3 5.3 10.6 16.1 19.4 19.5 18.3 11.1 6.9 4.6 1.5 9.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 6 11 11 3 0 0 0 0 31 DAYS WITH MINIMUM TEMP. <=-4 18 4 0 0 0 0 0 0 0 0 0 3 25 DAYS WITH FREEZING MIN.<= 0 30 17 6 0 0 0 0 0 0 0 2 12 67 TEMPERATURE RECORDS LOWEST(C) -12.0 -10.0 -3.0 6.0 10.0 14.0 15.0 15.0 6.0 1.0 -1.0 -6.0 -12.0 DAY 27 3 2 13 2 9 5 15 29 20 3 22 MAXIMUM AIR TEMPERATURE (C) 12.8 14.4 20.9 24.4 32.7 36.1 34.4 34.9 29.1 27.0 20.1 15.8 25.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 24 30 31 31 11 6 0 0 135 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.0 22.0 29.0 32.0 38.0 40.0 38.0 38.0 37.0 31.0 24.0 21.0 40.0 DAY 5 23 29 25 29 30 10 11 1 5 4 14 DIF. BETWEEN (MAX.-MIN.) (C) 17.2 14.1 15.6 13.8 16.6 16.7 14.9 16.6 18.0 20.1 15.5 14.3 16.1 MEAN DAILY TEMP. (MDT) (C) 4.2 7.4 13.1 17.5 24.4 27.7 26.9 26.6 20.1 17.0 12.3 8.7 17.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 9.5 115.0 202.5 183.5 174.0 32.0 1.5 0.0 0.0 718.0 HEATING DEG. DAYS(BASE 18 0C) 428.0 297.5 157.5 41.0 0.0 0.0 0.0 0.0 7.5 55.0 170.0 288.5 1445.0 DEWPOINT (MEAN C) -9.8 -3.8 -0.1 2.8 3.6 6.6 4.9 4.4 -2.5 -3.5 1.9 0.5 0.4 MIXING RATIO (G/KG) 2.29 3.58 4.70 5.83 6.04 7.45 6.65 6.39 3.89 3.58 5.31 4.91 5.05 VAPOUR PRESSURE (HPA) 3.14 4.87 6.41 7.90 8.18 10.03 8.97 8.64 5.31 4.90 7.26 6.69 6.86 SATURATION DEF. (HPA) 5.47 5.76 9.89 15.56 29.08 34.55 33.59 32.26 24.27 20.22 9.59 6.28 18.88 RELATIVE HUMIDITY (MEAN %) 41 52 46 39 24 24 23 22 20 22 46 56 35 RELATIVE HUMIDITY (MAX. %) 59 73 65 57 37 33 32 32 32 34 64 74 49 RELATIVE HUMIDITY (MIN. %) 24 30 30 27 17 18 17 17 14 15 35 45 24 RELATIVE HUMIDITY (MEAN% 03UTC) 54 64 60 55 35 33 32 31 31 34 63 72 47 RELATIVE HUMIDITY (MEAN% 09UTC) 26 38 33 32 18 19 19 18 16 18 38 47 27 RELATIVE HUMIDITY (MEAN% 15UTC) 38 45 38 35 22 22 21 21 18 22 48 56 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.4 21.3 41.0 46.3 1.1 0.0 0.0 0.0 0.0 0.0 9.3 36.5 157.9 DAYS WITH PRECIPITATION >=10 0 1 2 1 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 5 0 2 2 4 0 0 0 0 0 0 1 2 11 DAYS WITH PRECIPITATION >= 1 1 3 5 6 1 0 0 0 0 0 3 5 24 DAYS WITH PRECIPITATION 2 8 7 6 5 0 0 0 0 0 3 10 41 GREATEST DAILY PRECIPITATION 2.0 12.0 23.0 24.0 1.0 0.0 0.0 0.0 0.0 0.0 5.0 23.0 24.0 DAY 14 14 8 12 11 ** ** ** ** ** 12 31 DAY WITH THUNDER STORM 0 0 1 3 1 0 0 0 0 0 0 1 6 DAYS WITH SNOW OR SLEET 0 2 0 0 0 0 0 0 0 0 0 1 3 DAYS WITH DUST 0 5 6 6 5 7 13 5 3 3 2 2 57 WIND DIRECTION (PREVAILING) 90 270 90 270 90 90 90 90 90 135 135 270 90 PREVAILING WIND SPEED(KNOTS) 5.6 8.1 5.6 8.9 6.2 7.8 6.9 7.6 6.8 5.8 6.8 6.4 6.5 PREVAILING WIND PERCENT 20.2 16.1 17.4 21.4 18.8 36.7 38.1 37.2 24.2 16.8 17.3 21.3 20.8 CALMS PERCENT OF WIND 25.5 38.1 32.8 21.4 16.1 7.2 11.3 8.9 27.3 29.7 26.7 21.3 22.8 NO. OF WIND OBSERVATION 247 223 247 173 186 180 160 180 165 155 150 155 2221 VECTOR WIND DIRECTION (MEAN) 126 232 257 279 119 83 70 78 67 34 208 232 81 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.4 0.5 1.9 0.8 4.0 4.2 5.1 3.0 0.1 0.4 0.4 1.1 WIND STEADINESES (MEAN %) 19.0 30.4 11.4 33.9 14.8 59.7 64.6 73.9 65.2 2.4 8.0 8.2 20.8 WIND SPEED (MEAN KNOTS) 4.2 4.6 4.4 5.6 5.4 6.7 6.5 6.9 4.6 4.1 5.0 4.9 5.3 FASTEST WIND DIRECTION 280 180 220 150 230 150 360 90 80 280 60 160 180 FASTEST WIND SPEED (KNOTS) 15 30 20 25 20 20 18 20 18 12 20 20 30 DAY 10 14 15 6 28 8 11 8 18 23 18 20 DAYS WITH SKY CLEAR (0-2)/8 23 18 17 16 22 28 29 30 30 31 15 14 273 DAYS WITH P.CLOUDY (3-6)/8 6 6 10 9 9 2 0 1 0 0 13 14 70 DAYS WITH CLOUDY (7-8)/8 2 4 4 5 0 0 0 0 0 0 2 3 20 DAYS WITH VISIBILITY =< 2 KM 0 4 3 4 1 1 4 3 1 0 0 0 21 DURATION OF SUNSHINE HOURS 243.1 207.6 245.0 242.7 295.3 331.9 341.1 341.7 328.4 314.4 194.8 201.2 3287.2 ======================================================================================================================= 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 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 857.2 852.4 855.4 852.5 851.8 847.3 848.5 849.8 854.5 857.4 858.4 855.6 853.4 MAX. QFE PRESSURE IN HPA 866.5 860.5 861.1 858.8 856.8 852.2 852.4 854.7 859.9 862.5 865.4 862.2 866.5 DAY-HOUR 4- 6 4- 6 17- 3 21- 6 2-18 1- 6 26- 3 21- 3 24- 6 11- 6 20- 6 11- 6 MIN. QFE PRESSURE IN HPA 846.0 843.0 844.2 845.1 846.0 838.9 842.8 845.4 848.4 851.8 851.1 846.1 838.9 DAY-HOUR 14- 0 28- 0 21-12 26- 3 26-12 5-15 23-15 9-12 2-15 1-12 11-12 20- 3 MEAN QNH PRESSURE IN HPA 1025.4 1019.8 1023.2 1019.9 1019.2 1013.9 1015.3 1016.8 1022.2 1025.5 1026.7 1023.5 1021.0 MAX. QNH PRESSURE IN HPA 1036.1 1029.2 1029.9 1027.2 1024.9 1019.6 1019.8 1022.5 1028.5 1031.5 1034.8 1031.1 1036.1 DAY-HOUR 4- 6 4- 6 17- 3 21- 6 2-18 1- 6 26- 3 21- 3 24- 6 11- 6 20- 6 11- 6 MIN. QNH PRESSURE IN HPA 1012.4 1008.9 1010.3 1011.4 1012.4 1004.2 1008.7 1011.7 1015.2 1019.1 1018.3 1012.5 1004.2 DAY-HOUR 14- 0 28- 0 21-12 26- 3 26-12 5-15 23-15 9-12 2-15 1-12 11-12 20- 3 MEAN QFF PRESSURE IN HPA 1026.9 1018.9 1018.4 ****** 1007.8 1000.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.5 1034.0 1028.8 ****** 1016.8 1007.6 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 4- 6 4- 3 17- 3 **-** 2-18 9- 3 **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1008.3 1002.5 1001.6 ****** 998.8 988.8 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 14- 0 14- 0 21-12 **-** 26-15 5-15 **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 857.2 852.0 855.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 864.8 859.0 860.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 5 4 17 ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 846.0 843.0 846.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 14 28 21 ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1025.4 1019.3 1023.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1034.1 1027.4 1028.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 5 4 17 ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1012.4 1008.9 1013.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 14 28 21 ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1026.1 1018.0 1018.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.1 1031.2 1026.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 4 4 17 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1008.3 1002.5 1003.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 14 14 21 ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 857.7 852.6 855.9 852.9 852.9 848.3 849.4 850.5 855.4 858.1 858.9 855.9 854.0 MAX. QFE PRESSURE IN HPA 865.1 859.5 861.1 858.5 856.4 851.9 852.4 854.7 859.8 861.7 864.6 862.1 865.1 DAY 4 4 17 21 3 1 26 21 24 11 21 12 MIN. QFE PRESSURE IN HPA 848.1 844.5 847.7 845.1 848.8 841.6 846.1 846.9 851.3 853.4 853.4 846.1 841.6 DAY 14 14 21 26 30 6 23 9 2 1 11 20 MEAN QNH PRESSURE IN HPA 1025.9 1020.0 1023.8 1020.4 1020.4 1015.0 1016.4 1017.6 1023.2 1026.4 1027.3 1023.9 1021.7 MAX. QNH PRESSURE IN HPA 1034.5 1028.0 1029.9 1026.9 1024.4 1019.2 1019.8 1022.5 1028.4 1030.6 1033.9 1031.0 1034.5 DAY 4 4 17 21 3 1 26 21 24 11 21 12 MIN. QNH PRESSURE IN HPA 1014.8 1010.7 1014.4 1011.4 1015.6 1007.3 1012.5 1013.4 1018.5 1021.0 1021.0 1012.5 1007.3 DAY 14 14 21 26 30 6 23 9 2 1 11 20 MEAN QFF PRESSURE IN HPA 1029.0 1020.2 1020.2 1013.2 1009.2 1001.4 1003.3 1005.2 1015.2 1021.0 1024.5 1023.2 1015.5 MAX. QFF PRESSURE IN HPA 1037.0 1034.0 1028.8 1021.6 1016.5 1007.6 1007.3 1009.1 1021.5 1026.7 1031.2 1032.2 1037.0 DAY 4 4 17 21 3 9 26 21 24 22 14 12 MIN. QFF PRESSURE IN HPA 1012.8 1004.2 1007.6 1000.6 1001.9 992.2 999.0 1002.4 1005.4 1012.6 1016.0 1007.5 992.2 DAY 14 14 21 26 30 6 23 12 3 7 11 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 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.7 853.6 856.6 853.4 853.0 848.3 849.4 850.8 855.7 858.7 859.7 856.9 854.6 MAX. QFE PRESSURE IN HPA 866.5 860.5 860.9 858.8 856.3 852.2 852.3 854.7 859.9 862.5 865.4 862.2 866.5 DAY 4 4 17 21 3 1 26 21 24 11 20 11 MIN. QFE PRESSURE IN HPA 849.4 845.9 848.0 846.3 849.2 842.6 845.9 846.9 851.6 854.2 853.9 846.9 842.6 DAY 14 8 21 26 30 5 23 9 2 7 11 20 MEAN QNH PRESSURE IN HPA 1027.1 1021.2 1024.7 1021.0 1020.5 1015.1 1016.3 1017.9 1023.6 1027.1 1028.3 1025.0 1022.3 MAX. QNH PRESSURE IN HPA 1036.1 1029.2 1029.6 1027.2 1024.3 1019.6 1019.7 1022.5 1028.5 1031.5 1034.8 1031.1 1036.1 DAY 4 4 17 21 3 1 26 21 24 11 20 11 MIN. QNH PRESSURE IN HPA 1016.3 1012.3 1014.7 1012.7 1016.1 1008.5 1012.3 1013.4 1018.9 1021.9 1021.5 1013.4 1008.5 DAY 14 8 21 26 30 5 23 9 2 7 11 20 MEAN QFF PRESSURE IN HPA 1029.0 1020.5 1019.8 1013.3 1008.3 1001.0 ****** 1005.2 1012.0 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.5 1033.2 1027.1 1021.1 1016.2 1007.6 ****** 1009.0 1017.0 ****** ****** ****** ****** DAY 4 4 10 28 3 9 ** 21 15 ** ** ** MIN. QFF PRESSURE IN HPA 1014.6 1009.0 1006.3 1002.8 1000.4 992.8 ****** 1002.2 1005.1 ****** ****** ****** ****** DAY 14 8 21 26 30 5 ** 9 3 ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 856.9 852.7 855.6 852.7 851.9 847.3 848.5 849.7 854.4 857.4 858.3 855.6 853.4 MAX. QFE PRESSURE IN HPA 865.0 859.3 859.5 857.6 855.1 851.4 851.3 853.3 857.8 861.2 864.3 861.2 865.0 DAY 4 4 10 28 1 1 26 21 23 11 20 11 MIN. QFE PRESSURE IN HPA 848.0 846.9 846.5 846.9 848.5 841.7 844.9 846.0 850.1 853.1 851.9 846.3 841.7 DAY 14 8 21 14 26 5 23 9 2 1 11 20 MEAN QNH PRESSURE IN HPA 1025.0 1020.1 1023.5 1020.2 1019.2 1013.9 1015.3 1016.6 1022.2 1025.6 1026.7 1023.5 1021.0 MAX. QNH PRESSURE IN HPA 1034.4 1027.8 1028.0 1025.8 1022.9 1018.6 1018.5 1020.8 1026.1 1030.0 1033.6 1030.0 1034.4 DAY 4 4 10 28 1 1 26 21 23 11 20 11 MIN. QNH PRESSURE IN HPA 1014.7 1013.4 1013.0 1013.4 1015.3 1007.4 1011.1 1012.4 1017.1 1020.6 1019.2 1012.7 1007.4 DAY 14 8 21 14 26 5 23 9 2 1 11 20 MEAN QFF PRESSURE IN HPA 1025.3 1018.2 1017.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.0 1029.6 1025.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 4 4 2 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1011.8 1008.2 1003.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 14 24 21 ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.8 851.3 854.0 851.3 850.5 846.0 847.3 848.6 853.3 856.2 857.2 854.6 852.2 MAX. QFE PRESSURE IN HPA 863.5 858.5 857.6 856.2 854.2 849.8 850.1 851.9 856.6 859.6 863.6 860.7 863.6 DAY 4 4 17 28 2 1 6 21 23 11 20 11 MIN. QFE PRESSURE IN HPA 849.2 846.3 844.2 845.6 846.0 839.6 844.1 845.4 848.5 851.8 851.1 846.7 839.6 DAY 14 8 21 14 26 5 22 9 2 1 11 20 MEAN QNH PRESSURE IN HPA 1023.8 1018.6 1021.6 1018.5 1017.6 1012.4 1013.9 1015.4 1020.8 1024.1 1025.4 1022.3 1019.5 MAX. QNH PRESSURE IN HPA 1032.6 1026.9 1025.8 1024.2 1021.9 1016.8 1017.1 1019.2 1024.7 1028.1 1032.8 1029.4 1032.8 DAY 4 4 17 28 2 1 6 21 23 11 20 11 MIN. QNH PRESSURE IN HPA 1016.1 1012.7 1010.3 1011.9 1012.4 1005.0 1010.2 1011.7 1015.3 1019.1 1018.3 1013.2 1005.0 DAY 14 8 21 14 26 5 22 9 2 1 11 20 MEAN QFF PRESSURE IN HPA 1024.5 1017.1 1016.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.9 1028.7 1024.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 4 4 2 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1013.3 1008.1 1001.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 14 13 21 ** ** ** ** ** ** ** ** ** ======================================================================================================================= 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 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.7 851.9 854.5 851.6 850.6 846.2 847.6 848.8 853.7 856.5 857.6 855.0 852.6 MAX. QFE PRESSURE IN HPA 864.6 858.7 859.0 856.5 854.8 850.4 850.6 852.3 857.5 860.7 863.9 860.9 864.6 DAY 4 4 16 28 2 8 6 21 23 11 20 11 MIN. QFE PRESSURE IN HPA 849.3 845.5 844.8 846.5 846.2 838.9 842.8 846.0 848.4 852.1 852.3 847.2 838.9 DAY 13 13 21 14 26 5 23 9 2 1 11 20 MEAN QNH PRESSURE IN HPA 1024.8 1019.2 1022.2 1018.9 1017.8 1012.6 1014.3 1015.6 1021.3 1024.6 1025.9 1022.8 1020.0 MAX. QNH PRESSURE IN HPA 1033.9 1027.1 1027.4 1024.5 1022.6 1017.5 1017.7 1019.7 1025.7 1029.4 1033.1 1029.6 1033.9 DAY 4 4 16 28 2 8 6 21 23 11 20 11 MIN. QNH PRESSURE IN HPA 1016.2 1011.8 1011.0 1013.0 1012.6 1004.2 1008.7 1012.4 1015.2 1019.5 1019.7 1013.8 1004.2 DAY 13 13 21 14 26 5 23 9 2 1 11 20 MEAN QFF PRESSURE IN HPA 1027.7 1019.3 1018.4 1011.6 1006.3 998.7 1001.1 1003.1 1013.3 1019.0 1022.9 1022.1 1013.6 MAX. QFF PRESSURE IN HPA 1036.4 1031.4 1026.7 1018.9 1014.8 1005.7 1005.1 1007.2 1019.1 1024.5 1029.3 1032.2 1036.4 DAY 3 4 3 27 2 8 6 21 23 22 20 31 MIN. QFF PRESSURE IN HPA 1016.5 1007.1 1004.7 1002.5 998.8 988.8 995.2 998.4 1002.4 1011.4 1015.8 1010.1 988.8 DAY 13 13 21 25 26 5 23 4 2 6 5 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 857.5 852.9 855.7 853.2 852.2 848.0 ****** 850.8 854.4 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 865.7 859.8 860.4 858.3 856.8 851.9 ****** 853.7 858.0 ****** ****** ****** ****** DAY 3 4 16 20 2 8 ** 21 10 ** ** ** MIN. QFE PRESSURE IN HPA 849.2 845.3 847.9 847.6 847.8 840.2 ****** 847.8 851.2 ****** ****** ****** ****** DAY 13 27 20 25 26 5 ** 9 2 ** ** ** MEAN QNH PRESSURE IN HPA 1025.7 1020.4 1023.7 1020.8 1019.6 1014.7 ****** 1017.9 1022.2 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1035.2 1028.4 1029.1 1026.6 1024.9 1019.2 ****** 1021.3 1026.3 ****** ****** ****** ****** DAY 3 4 16 20 2 8 ** 21 10 ** ** ** MIN. QNH PRESSURE IN HPA 1016.1 1011.6 1014.6 1014.3 1014.5 1005.7 ****** 1014.5 1018.4 ****** ****** ****** ****** DAY 13 27 20 25 26 5 ** 9 2 ** ** ** MEAN QFF PRESSURE IN HPA 1027.6 1019.6 1018.8 1012.6 1007.3 1000.7 ****** 1005.1 1011.7 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1036.5 1030.9 1025.9 1021.2 1016.8 1007.5 ****** 1008.4 1017.5 ****** ****** ****** ****** DAY 3 3 2 27 2 8 ** 21 17 ** ** ** MIN. QFF PRESSURE IN HPA 1014.7 1007.5 1005.6 1001.7 999.5 988.9 ****** 1001.8 1004.6 ****** ****** ****** ****** DAY 13 13 20 25 29 5 ** 11 2 ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 857.3 852.5 855.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 865.2 859.0 860.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 4 3 16 ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 846.8 843.8 847.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 27 20 ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1025.5 1020.0 1023.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1034.6 1027.4 1029.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 4 3 16 ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1013.3 1009.9 1014.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 27 20 ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1026.0 1018.2 1018.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.8 1031.6 1025.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 3 3 16 ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1009.1 1004.4 1004.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 13 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 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.8 2.7 11.6 19.4 22.6 29.9 29.5 25.7 24.4 19.2 14.4 4.8 17.3 MINIMUN AIR TEMPERATURE (C) -2.0 -4.4 4.6 9.4 11.6 17.8 18.4 14.5 11.8 7.4 5.0 -1.8 7.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 5 5 2 0 0 0 0 12 DAYS WITH MINIMUM TEMP. <=-4 15 18 0 0 0 0 0 0 0 0 0 12 45 DAYS WITH FREEZING MIN.<= 0 23 25 4 0 0 0 0 0 0 0 6 21 79 TEMPERATURE RECORDS LOWEST(C) -9.0 -10.0 -3.0 5.0 6.0 13.0 15.0 7.0 3.0 4.0 -2.0 -14.0 -14.0 DAY 31 5 4 4 25 6 18 29 20 21 24 27 MAXIMUM AIR TEMPERATURE (C) 8.6 8.1 16.4 24.9 27.4 34.8 34.2 30.9 30.8 26.9 21.9 10.7 23.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 11 30 30 22 20 2 0 0 117 DAYS WITH MAXIMUM TEMP. <= 0 0 4 0 0 0 0 0 0 0 0 0 2 6 TEMPERATURE RECORDS HIGHEST(C) 15.0 20.0 26.0 30.0 34.0 40.0 41.0 36.0 36.0 30.0 28.0 21.0 41.0 DAY 15 18 31 11 30 24 2 1 11 1 5 1 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 12.5 11.8 15.5 15.8 17.0 15.8 16.4 19.0 19.5 16.9 12.5 15.3 MEAN DAILY TEMP. (MDT) (C) 3.3 1.8 10.5 17.1 19.5 26.3 26.3 22.7 21.3 17.1 13.4 4.4 15.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.5 22.5 159.5 164.0 74.5 53.5 0.0 0.0 0.0 476.5 HEATING DEG. DAYS(BASE 18 0C) 455.5 468.5 232.5 47.5 15.5 0.0 0.0 4.0 12.0 32.0 138.0 420.5 1826.0 DEWPOINT (MEAN C) -1.7 -5.9 0.9 2.2 4.0 5.4 4.2 3.4 2.5 -2.1 -1.2 -4.1 0.6 MIXING RATIO (G/KG) 4.13 3.08 5.02 5.58 6.17 6.93 6.45 5.85 5.50 4.04 4.22 3.54 5.04 VAPOUR PRESSURE (HPA) 5.64 4.21 6.82 7.58 8.36 9.36 8.71 7.93 7.49 5.54 5.77 4.85 6.86 SATURATION DEF. (HPA) 2.74 3.91 7.58 16.13 20.44 34.59 33.99 26.77 25.32 18.25 11.88 4.60 17.18 RELATIVE HUMIDITY (MEAN %) 70 57 54 36 32 23 22 25 25 26 37 56 39 RELATIVE HUMIDITY (MAX. %) 85 76 79 59 52 36 31 37 39 41 55 76 56 RELATIVE HUMIDITY (MIN. %) 55 40 37 24 22 17 17 19 18 17 24 38 27 RELATIVE HUMIDITY (MEAN% 03UTC) 82 73 75 58 51 36 31 35 39 40 54 73 54 RELATIVE HUMIDITY (MEAN% 09UTC) 59 45 45 29 24 19 19 20 20 18 27 43 31 RELATIVE HUMIDITY (MEAN% 15UTC) 76 59 51 31 28 19 19 22 23 26 34 52 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 41.4 28.0 68.0 11.7 2.6 3.3 0.0 0.0 0.0 1.3 1.1 12.3 169.7 DAYS WITH PRECIPITATION >=10 0 1 3 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 4 3 6 1 0 0 0 0 0 0 0 0 14 DAYS WITH PRECIPITATION >= 1 11 5 10 3 1 1 0 0 0 1 1 5 38 DAYS WITH PRECIPITATION 14 5 14 6 4 2 0 0 0 2 4 7 58 GREATEST DAILY PRECIPITATION 7.0 12.0 16.4 6.0 2.0 3.0 0.0 0.0 0.0 1.0 1.0 4.0 16.4 DAY 20 20 15 24 10 13 ** ** ** 11 20 6 DAY WITH THUNDER STORM 0 2 1 4 1 1 0 0 0 0 0 0 9 DAYS WITH SNOW OR SLEET 4 4 0 0 0 0 0 0 0 0 0 2 10 DAYS WITH DUST 2 1 1 3 6 0 1 0 0 0 0 0 14 WIND DIRECTION (PREVAILING) 90 90 315 315 315 315 90 45 90 135 270 270 90 PREVAILING WIND SPEED(KNOTS) 6.2 5.2 7.8 6.9 6.2 6.3 8.0 7.3 6.7 5.3 6.1 5.2 6.5 PREVAILING WIND PERCENT 20.6 17.9 19.4 19.3 18.1 24.7 31.0 25.8 18.2 19.9 13.9 12.9 16.9 CALMS PERCENT OF WIND 23.9 26.2 25.8 33.3 20.6 9.3 2.6 9.7 17.6 28.5 41.1 49.5 24.7 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 159 186 180 186 1931 VECTOR WIND DIRECTION (MEAN) 86 109 303 312 259 48 75 64 51 59 349 210 58 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.3 0.7 0.5 1.2 1.1 4.4 2.9 2.4 0.6 0.2 0.2 0.8 WIND STEADINESES (MEAN %) 7.0 7.0 12.5 11.1 23.5 19.6 59.5 46.0 42.9 14.3 5.9 7.4 16.3 WIND SPEED (MEAN KNOTS) 4.3 4.3 5.6 4.5 5.1 5.6 7.4 6.3 5.6 4.2 3.4 2.7 4.9 FASTEST WIND DIRECTION 90 270 110 180 210 360 110 180 30 240 300 120 90 FASTEST WIND SPEED (KNOTS) 25 20 20 20 25 15 20 15 18 12 12 15 25 DAY 29 18 17 5 10 3 12 1 7 17 6 31 DAYS WITH SKY CLEAR (0-2)/8 14 20 14 18 19 30 31 28 30 28 17 15 264 DAYS WITH P.CLOUDY (3-6)/8 10 5 5 8 10 0 0 3 0 3 12 12 68 DAYS WITH CLOUDY (7-8)/8 7 4 12 4 2 0 0 0 0 0 1 4 34 DAYS WITH VISIBILITY =< 2 KM 5 1 1 0 2 0 0 0 0 0 0 1 10 DURATION OF SUNSHINE HOURS 189.5 212.2 186.5 264.6 269.7 346.6 362.7 344.9 326.9 297.4 216.3 199.2 3216.5 ======================================================================================================================= 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 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 855.5 855.4 853.5 853.6 851.8 850.3 848.9 852.0 855.0 858.5 857.7 857.1 854.1 MAX. QFE PRESSURE IN HPA 864.9 862.6 860.6 859.5 860.5 857.3 853.2 855.6 860.0 865.2 863.1 865.4 865.4 DAY-HOUR 9- 6 25- 6 16- 6 8- 6 25- 6 2- 3 24- 3 25- 3 17- 6 26- 6 24- 6 28- 6 MIN. QFE PRESSURE IN HPA 846.9 846.5 841.6 847.3 843.5 842.4 843.8 843.4 848.1 853.8 853.1 850.1 841.6 DAY-HOUR 29-15 9-15 18-12 25- 3 6-15 24-15 4-12 1-15 11-15 17-12 8-12 17-12 MEAN QNH PRESSURE IN HPA 1023.4 1023.3 1021.0 1021.2 1019.1 1017.4 1015.7 1019.3 1022.8 1026.8 1025.9 1025.2 1021.8 MAX. QNH PRESSURE IN HPA 1034.3 1031.6 1029.3 1028.0 1029.2 1025.5 1020.7 1023.5 1028.6 1034.6 1032.2 1034.8 1034.8 DAY-HOUR 9- 6 25- 6 16- 6 8- 6 25- 6 2- 3 24- 3 25- 3 17- 6 26- 6 24- 6 28- 6 MIN. QNH PRESSURE IN HPA 1013.4 1013.0 1007.3 1013.9 1009.5 1008.2 1009.9 1009.4 1014.8 1021.4 1020.6 1017.1 1007.3 DAY-HOUR 29-15 9-15 18-12 25- 3 6-15 24-15 4-12 1-15 11-15 17-12 8-12 17-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.8 1022.6 1027.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1030.2 1032.1 1044.9 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 26- 3 24- 3 27- 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.9 1014.8 1017.7 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 8-18 8- 6 6- 3 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 855.6 855.6 853.7 854.4 852.6 851.4 849.8 852.8 855.6 859.2 858.4 857.4 854.7 MAX. QFE PRESSURE IN HPA 864.0 861.3 860.0 858.7 860.0 857.3 853.2 855.6 859.4 864.9 861.8 864.5 864.9 DAY 9 25 16 8 25 2 24 25 17 26 24 28 MIN. QFE PRESSURE IN HPA 847.2 848.6 843.8 847.3 846.7 843.8 846.5 844.7 851.1 855.9 854.5 852.2 843.8 DAY 30 20 18 25 7 25 7 1 12 17 8 23 MEAN QNH PRESSURE IN HPA 1023.5 1023.5 1021.3 1022.1 1020.0 1018.7 1016.8 1020.3 1023.5 1027.7 1026.7 1025.6 1022.5 MAX. QNH PRESSURE IN HPA 1033.2 1030.1 1028.6 1027.1 1028.6 1025.5 1020.7 1023.5 1027.9 1034.3 1030.7 1033.8 1034.3 DAY 9 25 16 8 25 2 24 25 17 26 24 28 MIN. QNH PRESSURE IN HPA 1013.8 1015.4 1009.9 1013.9 1013.2 1009.9 1013.0 1010.9 1018.3 1023.9 1022.2 1019.6 1009.9 DAY 30 20 18 25 7 25 7 1 12 17 8 23 MEAN QFF PRESSURE IN HPA 1026.3 1027.8 1019.0 1015.4 1011.2 1005.7 1004.0 1009.7 1014.5 1022.1 1023.5 1027.8 1017.2 MAX. QFF PRESSURE IN HPA 1038.2 1037.6 1028.1 1022.9 1022.1 1014.1 1008.3 1016.0 1021.9 1030.2 1032.1 1044.9 1044.9 DAY 9 24 16 8 25 2 25 28 22 26 24 27 MIN. QFF PRESSURE IN HPA 1015.8 1013.4 1005.6 1005.6 1002.3 993.6 998.2 994.6 1006.2 1018.2 1016.1 1017.7 993.6 DAY 30 20 18 25 3 25 3 1 12 17 8 6 ======================================================================================================================= 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 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 856.7 856.5 854.6 855.0 852.8 851.4 849.8 852.9 855.9 859.7 859.0 858.3 855.2 MAX. QFE PRESSURE IN HPA 864.9 862.6 860.6 859.5 860.5 857.2 853.0 855.5 860.0 865.2 863.1 865.4 865.4 DAY 9 25 16 8 25 2 24 24 17 26 24 28 MIN. QFE PRESSURE IN HPA 849.1 849.0 844.5 849.0 847.3 844.4 846.3 845.1 851.2 856.4 854.7 853.4 844.4 DAY 30 20 18 25 3 25 7 1 11 17 8 17 MEAN QNH PRESSURE IN HPA 1024.8 1024.6 1022.4 1022.8 1020.3 1018.7 1016.8 1020.3 1023.9 1028.2 1027.4 1026.6 1023.1 MAX. QNH PRESSURE IN HPA 1034.3 1031.6 1029.3 1028.0 1029.2 1025.4 1020.5 1023.4 1028.6 1034.6 1032.2 1034.8 1034.8 DAY 9 25 16 8 25 2 24 24 17 26 24 28 MIN. QNH PRESSURE IN HPA 1016.0 1015.9 1010.7 1015.9 1013.9 1010.6 1012.7 1011.4 1018.4 1024.4 1022.5 1021.0 1010.6 DAY 30 20 18 25 3 25 7 1 11 17 8 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.8 1023.0 1028.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1028.5 1031.8 1044.7 ****** DAY ** ** ** ** ** ** ** ** ** 26 24 27 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.7 1014.8 1020.0 ****** DAY ** ** ** ** ** ** ** ** ** 17 8 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 855.5 855.6 853.8 854.0 852.0 850.6 849.0 852.0 854.9 858.5 857.5 856.8 854.2 MAX. QFE PRESSURE IN HPA 863.1 861.8 859.1 858.1 859.4 856.1 852.2 854.6 858.8 863.7 861.8 864.3 864.3 DAY 9 25 16 8 25 1 24 24 22 26 24 28 MIN. QFE PRESSURE IN HPA 849.9 848.1 843.4 849.4 846.2 843.9 845.5 844.6 850.0 855.3 853.9 851.7 843.4 DAY 30 20 18 5 4 25 4 1 11 17 8 17 MEAN QNH PRESSURE IN HPA 1023.3 1023.5 1021.4 1021.6 1019.3 1017.7 1015.8 1019.3 1022.7 1026.8 1025.7 1024.9 1021.9 MAX. QNH PRESSURE IN HPA 1032.2 1030.7 1027.6 1026.4 1027.9 1024.1 1019.6 1022.4 1027.2 1032.9 1030.7 1033.6 1033.6 DAY 9 25 16 8 25 1 24 24 22 26 24 28 MIN. QNH PRESSURE IN HPA 1016.9 1014.8 1009.4 1016.3 1012.6 1010.0 1011.8 1010.8 1017.0 1023.2 1021.5 1019.0 1009.4 DAY 30 20 18 5 4 25 4 1 11 17 8 17 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 854.6 854.4 852.3 852.3 850.8 849.2 847.9 851.0 853.6 857.1 856.4 855.9 853.0 MAX. QFE PRESSURE IN HPA 861.9 860.1 857.8 856.0 857.8 855.0 851.3 853.9 857.5 861.9 860.2 862.9 862.9 DAY 9 25 15 8 24 2 24 24 22 26 24 27 MIN. QFE PRESSURE IN HPA 847.9 847.0 841.6 848.2 844.7 842.6 843.8 843.5 848.6 853.8 853.1 850.1 841.6 DAY 29 9 18 5 6 24 4 1 11 17 8 17 MEAN QNH PRESSURE IN HPA 1022.3 1022.1 1019.7 1019.6 1018.0 1016.1 1014.6 1018.2 1021.2 1025.3 1024.4 1023.9 1020.4 MAX. QNH PRESSURE IN HPA 1030.8 1028.7 1026.1 1024.0 1026.1 1022.8 1018.5 1021.5 1025.7 1030.8 1028.8 1031.9 1031.9 DAY 9 25 15 8 24 2 24 24 22 26 24 27 MIN. QNH PRESSURE IN HPA 1014.6 1013.6 1007.3 1014.9 1010.9 1008.5 1009.9 1009.5 1015.4 1021.4 1020.6 1017.1 1007.3 DAY 29 9 18 5 6 24 4 1 11 17 8 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= 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 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 855.1 855.0 852.9 852.5 850.9 849.1 848.1 851.2 854.0 857.7 857.1 856.5 853.4 MAX. QFE PRESSURE IN HPA 862.1 860.7 859.5 856.0 858.1 855.1 851.6 853.8 858.1 862.3 861.1 863.1 863.1 DAY 9 25 15 8 24 2 24 27 16 26 24 27 MIN. QFE PRESSURE IN HPA 846.9 846.5 843.6 848.6 843.5 842.4 843.9 843.4 848.1 854.4 854.0 850.8 842.4 DAY 29 9 18 24 6 24 4 1 11 17 8 17 MEAN QNH PRESSURE IN HPA 1022.9 1022.9 1020.4 1020.0 1018.1 1016.0 1014.8 1018.5 1021.7 1025.9 1025.2 1024.5 1020.9 MAX. QNH PRESSURE IN HPA 1031.0 1029.4 1028.0 1024.0 1026.4 1022.9 1018.9 1021.4 1026.4 1031.3 1029.9 1032.2 1032.2 DAY 9 25 15 8 24 2 24 27 16 26 24 27 MIN. QNH PRESSURE IN HPA 1013.4 1013.0 1009.6 1015.4 1009.5 1008.2 1010.0 1009.4 1014.8 1022.1 1021.7 1018.0 1008.2 DAY 29 9 18 24 6 24 4 1 11 17 8 17 MEAN QFF PRESSURE IN HPA 1025.7 1026.9 1018.0 1013.2 1009.2 1002.9 1001.8 1007.8 1012.5 1020.2 1022.0 1026.7 1015.6 MAX. QFF PRESSURE IN HPA 1036.3 1037.1 1026.7 1019.4 1019.8 1011.6 1006.3 1014.4 1019.3 1026.6 1030.6 1041.8 1041.8 DAY 5 23 4 8 24 2 25 27 22 26 24 27 MIN. QFF PRESSURE IN HPA 1014.0 1013.9 1005.5 1007.5 1000.7 993.0 994.7 993.2 1002.4 1016.3 1015.2 1017.7 993.0 DAY 29 9 18 24 2 24 4 1 11 8 8 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 858.9 858.0 857.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 863.6 861.2 863.9 ****** DAY ** ** ** ** ** ** ** ** ** 25 24 27 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 855.6 854.9 851.0 ****** DAY ** ** ** ** ** ** ** ** ** 17 8 17 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1027.3 1026.3 1025.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1032.8 1030.0 1033.1 ****** DAY ** ** ** ** ** ** ** ** ** 25 24 27 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.5 1022.7 1018.2 ****** DAY ** ** ** ** ** ** ** ** ** 17 8 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.9 1022.0 1027.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1026.9 1029.3 1042.7 ****** DAY ** ** ** ** ** ** ** ** ** 25 24 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.9 1015.1 1017.8 ****** DAY ** ** ** ** ** ** ** ** ** 8 8 1 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 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 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.9 9.8 13.6 20.1 25.6 31.0 30.8 28.6 24.8 19.9 12.4 6.3 18.7 MINIMUN AIR TEMPERATURE (C) -5.0 1.8 5.1 10.7 14.4 19.9 19.9 18.6 12.7 7.2 1.3 -3.7 8.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 8 14 6 0 0 0 0 29 DAYS WITH MINIMUM TEMP. <=-4 21 4 2 0 0 0 0 0 0 0 7 16 50 DAYS WITH FREEZING MIN.<= 0 28 11 5 0 0 0 0 0 0 1 14 28 87 TEMPERATURE RECORDS LOWEST(C) -11.0 -7.0 -6.0 4.0 11.0 16.0 15.0 13.0 6.0 0.0 -6.0 -10.0 -11.0 DAY 2 7 11 14 17 3 9 9 30 1 9 27 MAXIMUM AIR TEMPERATURE (C) 7.8 16.0 20.2 26.1 31.4 36.8 36.7 33.9 31.8 28.0 21.3 14.3 25.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 24 30 31 31 25 9 0 0 157 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 14.0 22.0 26.0 32.0 36.0 40.0 42.0 38.0 36.0 32.0 28.0 18.0 42.0 DAY 28 21 4 28 31 16 11 1 2 9 3 29 DIF. BETWEEN (MAX.-MIN.) (C) 12.8 14.2 15.1 15.4 17.0 16.9 16.8 15.3 19.1 20.8 20.0 18.0 16.8 MEAN DAILY TEMP. (MDT) (C) 1.4 8.9 12.6 18.4 22.9 28.3 28.3 26.2 22.3 17.6 11.3 5.3 17.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 12.0 62.5 220.5 226.5 162.0 57.0 3.0 0.0 0.0 743.5 HEATING DEG. DAYS(BASE 18 0C) 514.5 255.0 169.5 37.0 0.0 0.0 0.0 0.0 5.0 39.5 202.5 393.0 1616.0 DEWPOINT (MEAN C) -7.8 -1.6 -2.2 -1.3 1.1 3.6 2.5 1.8 -1.4 -4.2 -9.0 -9.3 -2.3 MIXING RATIO (G/KG) 2.66 4.12 4.18 4.24 4.99 6.05 5.60 5.24 4.12 3.44 2.40 2.42 4.12 VAPOUR PRESSURE (HPA) 3.64 5.62 5.69 5.77 6.77 8.16 7.55 7.10 5.61 4.71 3.29 3.32 5.60 SATURATION DEF. (HPA) 3.89 7.29 11.05 19.21 27.49 38.19 38.43 33.40 27.59 20.39 12.79 7.11 20.57 RELATIVE HUMIDITY (MEAN %) 52 49 38 27 22 19 18 19 19 21 25 35 29 RELATIVE HUMIDITY (MAX. %) 71 74 64 47 36 29 27 29 32 33 41 52 45 RELATIVE HUMIDITY (MIN. %) 34 31 22 16 14 13 12 13 12 13 14 22 18 RELATIVE HUMIDITY (MEAN% 03UTC) 68 71 60 44 35 28 26 27 30 32 40 49 43 RELATIVE HUMIDITY (MEAN% 09UTC) 38 36 25 18 16 14 14 14 13 15 16 26 20 RELATIVE HUMIDITY (MEAN% 15UTC) 52 43 33 21 17 16 15 17 16 20 22 35 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.1 26.4 14.1 2.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 64.7 DAYS WITH PRECIPITATION >=10 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 2 1 1 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 1 5 6 4 1 0 0 0 0 0 0 0 0 16 DAYS WITH PRECIPITATION 10 8 8 4 5 0 0 0 0 0 0 2 37 GREATEST DAILY PRECIPITATION 12.6 15.0 7.0 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15.0 DAY 16 23 24 6 ** ** ** ** ** ** ** ** DAY WITH THUNDER STORM 0 0 0 0 2 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 4 0 1 0 0 0 0 0 0 0 0 0 5 DAYS WITH DUST 0 4 4 6 3 1 1 2 0 0 0 0 21 WIND DIRECTION (PREVAILING) 135 270 270 270 315 90 45 90 90 90 135 270 90 PREVAILING WIND SPEED(KNOTS) 5.1 8.1 9.1 7.5 7.4 7.5 7.5 8.8 6.4 4.8 5.4 6.1 6.8 PREVAILING WIND PERCENT 9.1 13.7 19.4 23.9 18.3 28.9 27.4 34.3 22.2 17.2 17.2 14.5 15.1 CALMS PERCENT OF WIND 64.0 48.8 36.6 27.8 28.5 19.4 14.0 9.0 27.2 39.2 46.1 48.4 34.2 NO. OF WIND OBSERVATION 186 168 186 180 186 180 186 166 180 186 180 186 2170 VECTOR WIND DIRECTION (MEAN) 315 242 287 290 334 86 79 75 73 94 274 272 58 VECTOR WIND MAGNITUDE(KNOTS) 0.2 1.0 2.8 2.5 0.6 2.7 4.4 5.6 2.0 0.5 0.2 0.5 0.8 WIND STEADINESES (MEAN %) 9.5 27.0 54.9 45.5 12.2 48.2 69.8 72.7 42.6 15.2 6.5 16.7 17.4 WIND SPEED (MEAN KNOTS) 2.1 3.7 5.1 5.5 4.9 5.6 6.3 7.7 4.7 3.3 3.1 3.0 4.6 FASTEST WIND DIRECTION 280 180 270 330 180 120 90 110 330 50 320 250 180 FASTEST WIND SPEED (KNOTS) 15 25 20 20 25 20 15 15 18 10 25 10 25 DAY 16 5 4 3 25 20 6 1 26 5 25 6 DAYS WITH SKY CLEAR (0-2)/8 14 11 14 14 23 28 30 31 30 31 26 22 274 DAYS WITH P.CLOUDY (3-6)/8 13 10 12 14 6 2 1 0 0 0 4 8 70 DAYS WITH CLOUDY (7-8)/8 4 7 5 2 2 0 0 0 0 0 0 1 21 DAYS WITH VISIBILITY =< 2 KM 3 3 3 2 0 0 0 1 0 0 0 0 12 DURATION OF SUNSHINE HOURS 189.7 163.4 229.5 242.1 314.0 338.2 362.0 357.5 325.6 310.3 256.4 229.5 3318.2 ======================================================================================================================= 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 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.8 854.6 854.1 852.6 851.4 848.4 847.0 850.0 853.8 857.5 857.7 857.6 853.5 MAX. QFE PRESSURE IN HPA 866.1 863.8 862.3 857.4 859.7 856.0 852.0 854.0 860.2 862.5 864.6 866.6 866.6 DAY-HOUR 25-18 7- 6 10- 6 4- 6 8- 6 3- 3 22- 3 21- 6 29- 6 22-18 12- 6 26-18 MIN. QFE PRESSURE IN HPA 846.1 841.2 844.0 848.2 846.0 840.3 841.7 846.0 848.7 853.5 852.4 848.9 840.3 DAY-HOUR 16-12 22-18 7-12 19-15 30-12 16-12 15-12 13-12 2-12 24-12 5-12 7-12 MEAN QNH PRESSURE IN HPA 1024.9 1022.4 1021.7 1020.1 1018.6 1015.1 1013.5 1017.0 1021.4 1025.7 1026.0 1025.8 1021.0 MAX. QNH PRESSURE IN HPA 1035.6 1033.0 1031.3 1025.6 1028.2 1024.0 1019.3 1021.7 1028.8 1031.5 1033.9 1036.2 1036.2 DAY-HOUR 25-18 7- 6 10- 6 4- 6 8- 6 3- 3 22- 3 21- 6 29- 6 22-18 12- 6 26-18 MIN. QNH PRESSURE IN HPA 1012.5 1006.8 1010.1 1014.9 1012.4 1005.8 1007.4 1012.4 1015.5 1021.1 1019.8 1015.8 1005.8 DAY-HOUR 16-12 22-18 7-12 19-15 30-12 16-12 15-12 13-12 2-12 24-12 5-12 7-12 MEAN QFF PRESSURE IN HPA 1029.3 ****** 1018.3 1012.6 1007.9 1001.3 1000.0 ****** 1011.7 1019.4 1024.5 1028.0 ****** MAX. QFF PRESSURE IN HPA 1042.6 ****** 1034.8 1020.7 1018.6 1010.8 1005.3 ****** 1023.3 1024.7 1034.1 1040.3 ****** DAY-HOUR 26- 3 **-** 10- 6 11- 3 8- 6 3- 3 27-18 **-** 30-15 22- 6 12- 3 27- 6 MIN. QFF PRESSURE IN HPA 1010.9 ****** 1006.3 1003.7 999.7 990.5 993.1 ****** 1003.2 1012.6 1014.5 1015.6 ****** DAY-HOUR 16- 6 **-** 7- 3 23-18 30-15 16-15 11-15 **-** 2-15 11-15 5-15 7-15 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 857.1 854.8 854.5 853.4 852.3 849.3 848.1 850.9 854.7 858.3 858.4 858.1 854.2 MAX. QFE PRESSURE IN HPA 865.0 862.1 861.4 857.2 859.4 856.0 852.0 853.6 860.0 861.7 864.2 866.1 866.1 DAY 26 7 11 4 8 3 22 21 29 6 12 27 MIN. QFE PRESSURE IN HPA 846.6 842.4 847.1 848.6 848.4 842.0 845.0 848.1 851.0 856.0 853.5 851.6 842.0 DAY 16 6 7 24 29 16 11 13 2 24 19 7 MEAN QNH PRESSURE IN HPA 1025.2 1022.6 1022.2 1020.9 1019.7 1016.2 1014.9 1018.1 1022.5 1026.6 1026.8 1026.3 1021.8 MAX. QNH PRESSURE IN HPA 1034.4 1031.0 1030.2 1025.4 1027.9 1024.0 1019.3 1021.2 1028.6 1030.6 1033.4 1035.6 1035.6 DAY 26 7 11 4 8 3 22 21 29 6 12 27 MIN. QNH PRESSURE IN HPA 1013.1 1008.2 1013.7 1015.4 1015.2 1007.8 1011.2 1014.8 1018.2 1024.0 1021.1 1018.9 1007.8 DAY 16 6 7 24 29 16 11 13 2 24 19 7 MEAN QFF PRESSURE IN HPA 1029.4 1021.6 1018.7 1013.6 1008.7 1002.1 1000.8 1005.7 1012.5 1020.3 1025.3 1028.4 1015.6 MAX. QFF PRESSURE IN HPA 1042.6 1034.2 1034.2 1020.7 1018.5 1010.8 1005.0 1009.7 1022.2 1024.6 1034.1 1040.1 1042.6 DAY 26 7 11 11 8 3 28 31 30 22 12 27 MIN. QFF PRESSURE IN HPA 1011.5 1004.5 1006.3 1006.0 1002.4 992.1 996.4 1000.5 1005.6 1014.5 1015.8 1018.1 992.1 DAY 16 6 7 24 29 16 17 1 3 11 25 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 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 858.1 856.0 855.2 853.8 852.5 849.2 847.9 851.0 855.0 858.7 859.0 858.9 854.6 MAX. QFE PRESSURE IN HPA 865.7 863.8 862.3 857.4 859.7 855.8 852.0 854.0 860.2 862.1 864.6 866.5 866.5 DAY 26 7 10 4 8 3 22 21 29 6 12 27 MIN. QFE PRESSURE IN HPA 847.0 846.1 847.5 849.3 848.2 842.2 844.6 848.3 851.3 856.0 854.3 852.0 842.2 DAY 16 22 7 24 29 16 11 13 2 24 19 7 MEAN QNH PRESSURE IN HPA 1026.4 1023.9 1023.1 1021.4 1019.9 1016.1 1014.6 1018.2 1022.8 1027.1 1027.4 1027.3 1022.4 MAX. QNH PRESSURE IN HPA 1035.2 1033.0 1031.3 1025.6 1028.2 1023.7 1019.3 1021.7 1028.8 1031.0 1033.9 1036.1 1036.1 DAY 26 7 10 4 8 3 22 21 29 6 12 27 MIN. QNH PRESSURE IN HPA 1013.6 1012.5 1014.1 1016.2 1014.9 1008.0 1010.8 1015.1 1018.5 1024.0 1022.0 1019.3 1008.0 DAY 16 22 7 24 29 16 11 13 2 24 19 7 MEAN QFF PRESSURE IN HPA 1030.3 1022.4 1019.1 1013.3 1008.6 1001.8 1000.6 ****** 1012.3 1019.8 1025.0 1028.7 ****** MAX. QFF PRESSURE IN HPA 1042.2 1037.4 1034.8 1020.4 1018.6 1009.9 1005.0 ****** 1022.7 1024.7 1033.2 1040.3 ****** DAY 26 7 10 14 8 3 28 ** 30 22 12 27 MIN. QFF PRESSURE IN HPA 1010.9 1005.7 1006.5 1005.7 1002.2 991.9 994.9 ****** 1005.1 1014.5 1015.2 1017.8 ****** DAY 16 22 7 24 29 16 11 ** 3 11 5 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 856.8 855.0 854.3 852.7 851.5 848.3 846.9 849.9 853.8 857.4 857.6 857.4 853.5 MAX. QFE PRESSURE IN HPA 865.5 863.2 862.0 856.1 858.4 855.2 850.3 852.5 859.2 861.5 863.4 864.7 865.5 DAY 25 7 10 4 8 3 22 21 29 22 12 27 MIN. QFE PRESSURE IN HPA 846.3 845.4 845.7 848.7 847.1 841.5 843.4 846.9 850.1 854.5 852.9 850.2 841.5 DAY 16 22 7 24 29 16 15 13 2 24 19 7 MEAN QNH PRESSURE IN HPA 1024.9 1022.8 1022.0 1020.1 1018.7 1015.1 1013.4 1016.9 1021.4 1025.6 1025.8 1025.6 1021.0 MAX. QNH PRESSURE IN HPA 1035.0 1032.3 1030.9 1024.1 1026.7 1023.0 1017.4 1019.9 1027.7 1030.3 1032.5 1034.0 1035.0 DAY 25 7 10 4 8 3 22 21 29 22 12 27 MIN. QNH PRESSURE IN HPA 1012.7 1011.7 1012.1 1015.5 1013.7 1007.2 1009.4 1013.4 1017.1 1022.2 1020.4 1017.3 1007.2 DAY 16 22 7 24 29 16 15 13 2 24 19 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 855.6 853.4 852.8 851.4 850.1 846.9 845.5 848.6 852.3 856.1 856.4 856.3 852.1 MAX. QFE PRESSURE IN HPA 864.0 860.6 860.5 854.8 856.4 853.0 849.0 851.3 858.2 860.2 862.3 863.2 864.0 DAY 25 7 10 20 8 3 22 21 30 5 12 26 MIN. QFE PRESSURE IN HPA 846.1 842.4 844.0 848.2 846.0 840.3 841.7 846.0 848.7 853.5 852.4 848.9 840.3 DAY 16 23 7 23 30 16 15 13 2 24 5 7 MEAN QNH PRESSURE IN HPA 1023.5 1020.9 1020.3 1018.6 1017.2 1013.5 1011.8 1015.4 1019.7 1024.0 1024.4 1024.3 1019.5 MAX. QNH PRESSURE IN HPA 1033.2 1029.3 1029.2 1022.6 1024.4 1020.5 1015.9 1018.5 1026.5 1028.8 1031.3 1032.3 1033.2 DAY 25 7 10 20 8 3 22 21 30 5 12 26 MIN. QNH PRESSURE IN HPA 1012.5 1008.2 1010.1 1014.9 1012.4 1005.8 1007.4 1012.4 1015.5 1021.1 1019.8 1015.8 1005.8 DAY 16 23 7 23 30 16 15 13 2 24 5 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION 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 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 856.3 854.0 853.4 851.8 850.2 847.4 845.8 849.1 852.7 856.8 856.9 856.8 852.6 MAX. QFE PRESSURE IN HPA 864.9 861.1 861.2 855.2 855.9 853.1 849.6 852.1 858.6 860.6 863.0 864.1 864.9 DAY 25 7 10 20 8 3 22 21 30 22 12 26 MIN. QFE PRESSURE IN HPA 847.0 842.8 847.2 848.2 846.2 841.1 842.4 846.5 848.7 854.1 852.8 849.2 841.1 DAY 16 22 7 19 30 16 15 4 2 24 5 7 MEAN QNH PRESSURE IN HPA 1024.3 1021.7 1020.9 1019.1 1017.3 1014.0 1012.1 1016.0 1020.2 1024.9 1025.0 1024.9 1020.0 MAX. QNH PRESSURE IN HPA 1034.3 1029.9 1030.0 1023.0 1023.9 1020.6 1016.6 1019.5 1027.0 1029.3 1032.1 1033.3 1034.3 DAY 25 7 10 20 8 3 22 21 30 22 12 26 MIN. QNH PRESSURE IN HPA 1013.6 1008.7 1013.8 1014.9 1012.6 1006.7 1008.2 1013.0 1015.5 1021.8 1020.3 1016.1 1006.7 DAY 16 22 7 19 30 16 15 4 2 24 5 7 MEAN QFF PRESSURE IN HPA 1028.4 1020.5 1017.4 1011.6 1006.3 999.9 998.0 1003.5 1010.2 1018.4 1023.5 1026.9 1013.7 MAX. QFF PRESSURE IN HPA 1040.0 1034.7 1033.2 1018.3 1014.4 1007.1 1002.2 1008.0 1023.3 1023.9 1032.4 1037.4 1040.0 DAY 26 7 10 14 8 2 22 30 30 22 12 22 MIN. QFF PRESSURE IN HPA 1011.9 1003.7 1007.7 1005.2 999.7 990.5 993.1 998.3 1003.2 1012.6 1014.5 1015.6 990.5 DAY 16 22 7 19 30 16 11 4 2 11 5 7 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 857.2 854.7 854.4 852.9 851.9 849.0 847.8 ****** 854.3 858.1 858.1 858.2 ****** MAX. QFE PRESSURE IN HPA 866.1 861.4 862.0 856.8 858.5 855.3 851.5 ****** 858.9 862.5 864.0 866.6 ****** DAY 25 7 10 10 7 2 22 ** 30 22 12 26 MIN. QFE PRESSURE IN HPA 848.6 841.2 847.8 848.3 847.5 842.3 843.8 ****** 850.0 856.0 852.5 852.3 ****** DAY 16 22 8 23 30 15 15 ** 2 10 6 6 MEAN QNH PRESSURE IN HPA 1025.3 1022.5 1022.1 1020.4 1019.2 1015.9 1014.5 ****** 1022.0 1026.4 1026.4 1026.6 ****** MAX. QNH PRESSURE IN HPA 1035.6 1030.2 1030.9 1024.9 1026.9 1023.2 1018.8 ****** 1027.3 1031.5 1033.2 1036.2 ****** DAY 25 7 10 10 7 2 22 ** 30 22 12 26 MIN. QNH PRESSURE IN HPA 1015.4 1006.8 1014.5 1015.1 1014.1 1008.1 1009.9 ****** 1017.0 1024.0 1019.9 1019.7 ****** DAY 16 22 8 23 30 15 15 ** 2 10 6 6 MEAN QFF PRESSURE IN HPA 1029.1 1020.8 1018.0 1012.2 1007.9 1001.6 1000.5 ****** 1011.6 1019.1 1024.1 1028.0 ****** MAX. QFF PRESSURE IN HPA 1042.1 1034.7 1034.1 1019.1 1016.5 1009.0 1005.3 ****** 1023.0 1023.7 1032.3 1039.7 ****** DAY 25 7 10 10 7 2 27 ** 30 22 10 26 MIN. QFF PRESSURE IN HPA 1013.4 1000.1 1009.7 1003.7 1001.0 992.3 994.4 ****** 1003.9 1014.2 1014.9 1018.0 ****** DAY 16 22 22 23 30 15 16 ** 2 10 6 6 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 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 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 4.0 14.3 18.4 24.3 28.6 29.2 28.0 25.1 15.7 12.5 5.4 17.4 MINIMUN AIR TEMPERATURE (C) -3.0 -1.3 5.9 10.1 13.8 17.7 20.2 16.6 14.0 3.5 1.6 -1.5 8.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 4 14 2 0 0 0 0 21 DAYS WITH MINIMUM TEMP. <=-4 14 9 0 0 0 0 0 0 0 0 0 9 32 DAYS WITH FREEZING MIN.<= 0 25 17 7 0 0 0 0 0 0 0 10 22 81 TEMPERATURE RECORDS LOWEST(C) -9.0 -11.0 -2.0 2.0 8.0 13.0 16.0 12.0 8.0 1.0 -3.0 -9.0 -11.0 DAY 6 7 7 13 3 16 18 31 30 14 19 4 MAXIMUM AIR TEMPERATURE (C) 8.1 8.6 20.5 24.3 30.2 34.3 34.2 34.0 31.7 24.0 21.5 11.6 23.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 4 1 17 30 31 31 22 0 0 0 136 DAYS WITH MAXIMUM TEMP. <= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 15.0 15.0 30.0 30.0 36.0 39.0 38.0 37.0 35.0 28.0 27.0 17.0 39.0 DAY 15 28 19 25 24 30 19 9 3 24 4 5 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 9.9 14.6 14.2 16.4 16.6 14.0 17.4 17.7 20.5 19.9 13.1 15.5 MEAN DAILY TEMP. (MDT) (C) 2.6 3.7 13.2 17.2 22.0 26.0 27.2 25.3 22.8 13.7 11.6 5.1 15.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.0 50.0 149.5 192.0 133.0 70.5 0.0 0.0 0.0 599.0 HEATING DEG. DAYS(BASE 18 0C) 478.0 401.5 162.5 53.0 4.5 0.0 0.0 0.0 1.5 132.0 192.5 400.5 1826.0 DEWPOINT (MEAN C) -5.0 -3.0 1.8 2.3 1.8 2.5 4.8 0.5 0.3 -6.9 -6.4 -3.8 -0.9 MIXING RATIO (G/KG) 3.31 3.87 5.32 5.47 5.22 5.52 6.50 4.85 4.70 2.78 2.85 3.60 4.50 VAPOUR PRESSURE (HPA) 4.51 5.28 7.25 7.42 7.09 7.48 8.76 6.57 6.40 3.82 3.92 4.92 6.12 SATURATION DEF. (HPA) 3.40 3.33 10.74 15.08 24.72 33.04 32.68 33.01 27.11 15.37 11.95 4.49 17.91 RELATIVE HUMIDITY (MEAN %) 59 63 48 39 25 20 23 18 21 23 29 56 35 RELATIVE HUMIDITY (MAX. %) 76 79 72 61 42 33 34 28 31 35 46 75 51 RELATIVE HUMIDITY (MIN. %) 46 47 31 25 16 13 16 13 14 14 17 39 24 RELATIVE HUMIDITY (MEAN% 03UTC) 70 76 70 58 40 32 34 28 30 33 43 69 49 RELATIVE HUMIDITY (MEAN% 09UTC) 50 54 36 27 17 15 18 15 16 16 18 43 27 RELATIVE HUMIDITY (MEAN% 15UTC) 58 60 39 35 22 17 20 15 19 23 29 59 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 76.0 44.7 41.4 65.1 0.5 1.0 0.0 0.0 0.0 0.0 0.0 30.0 258.7 DAYS WITH PRECIPITATION >=10 3 1 2 3 0 0 0 0 0 0 0 0 9 DAYS WITH PRECIPITATION >= 5 6 3 3 4 0 0 0 0 0 0 0 2 18 DAYS WITH PRECIPITATION >= 1 9 7 7 5 0 1 0 0 0 0 0 8 37 DAYS WITH PRECIPITATION 10 12 9 7 2 2 2 0 1 0 0 9 54 GREATEST DAILY PRECIPITATION 26.0 17.0 17.0 34.0 0.5 1.0 0.0 0.0 0.0 0.0 0.0 6.0 34.0 DAY 19 19 31 2 11 13 ** ** ** ** ** 7 DAY WITH THUNDER STORM 1 1 3 3 0 1 0 0 0 0 0 2 11 DAYS WITH SNOW OR SLEET 6 3 0 0 0 0 0 0 0 0 0 1 10 DAYS WITH DUST 2 0 1 5 1 0 0 0 0 0 0 0 9 WIND DIRECTION (PREVAILING) 270 90 90 270 90 90 90 90 90 135 90 270 90 PREVAILING WIND SPEED(KNOTS) 9.1 5.9 6.0 7.0 5.3 6.6 8.0 6.5 5.5 5.1 4.6 6.1 6.4 PREVAILING WIND PERCENT 16.1 19.0 16.1 22.8 17.2 21.1 35.8 25.5 17.2 15.1 11.1 9.1 16.6 CALMS PERCENT OF WIND 45.2 41.1 33.3 30.0 28.5 20.6 5.6 15.8 27.2 41.9 55.0 64.5 34.3 NO. OF WIND OBSERVATION 186 168 186 180 186 180 179 165 180 186 180 186 2162 VECTOR WIND DIRECTION (MEAN) 310 342 307 279 39 79 73 68 26 357 321 221 50 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.5 0.2 2.3 1.1 2.3 5.4 2.6 1.2 0.5 0.3 0.2 0.9 WIND STEADINESES (MEAN %) 7.1 15.2 5.0 53.5 24.4 41.8 72.0 50.0 26.7 15.6 12.5 9.5 21.4 WIND SPEED (MEAN KNOTS) 4.2 3.3 4.0 4.3 4.5 5.5 7.5 5.2 4.5 3.2 2.4 2.1 4.2 FASTEST WIND DIRECTION 270 100 250 260 180 120 30 80 180 360 320 180 270 FASTEST WIND SPEED (KNOTS) 25 12 18 15 15 18 18 15 15 12 12 15 25 DAY 25 12 25 6 11 26 10 29 6 6 21 13 DAYS WITH SKY CLEAR (0-2)/8 12 9 15 9 21 24 25 31 26 30 26 17 245 DAYS WITH P.CLOUDY (3-6)/8 9 13 10 17 7 5 6 0 4 1 4 7 83 DAYS WITH CLOUDY (7-8)/8 10 6 6 4 3 1 0 0 0 0 0 7 37 DAYS WITH VISIBILITY =< 2 KM 4 1 0 3 0 0 0 0 0 0 0 0 8 DURATION OF SUNSHINE HOURS 159.9 151.5 219.6 210.5 297.7 322.1 336.0 358.2 307.3 315.0 261.5 191.6 3130.9 ======================================================================================================================= 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 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 854.3 855.3 855.4 851.6 852.3 849.6 848.1 849.4 853.3 858.1 858.8 856.4 853.6 MAX. QFE PRESSURE IN HPA 862.9 861.6 862.1 857.2 857.0 854.2 852.5 852.7 857.8 864.7 866.4 862.9 866.4 DAY-HOUR 5- 6 4- 6 15- 6 16- 6 8- 6 1-18 29- 3 3- 3 9- 6 15- 6 18- 6 31- 6 MIN. QFE PRESSURE IN HPA 839.3 849.5 848.2 844.3 845.3 844.8 841.7 844.6 846.1 854.0 852.0 846.0 839.3 DAY-HOUR 25- 3 12-12 31-12 29-12 27-15 3-12 20-15 16-12 3-12 18-12 29-12 13-15 MEAN QNH PRESSURE IN HPA 1022.0 1023.2 1023.3 1018.8 1019.7 1016.6 1014.8 1016.4 1020.9 1026.5 1027.2 1024.5 1021.1 MAX. QNH PRESSURE IN HPA 1031.9 1030.4 1031.0 1025.4 1025.1 1021.9 1019.9 1020.2 1026.1 1034.0 1036.0 1031.9 1036.0 DAY-HOUR 5- 6 4- 6 15- 6 16- 6 8- 6 1-18 29- 3 3- 3 9- 6 15- 6 18- 6 31- 6 MIN. QNH PRESSURE IN HPA 1004.6 1016.4 1014.9 1010.4 1011.6 1011.0 1007.4 1010.8 1012.5 1021.7 1019.3 1012.4 1004.6 DAY-HOUR 25- 3 12-12 31-12 29-12 27-15 3-12 20-15 16-12 3-12 18-12 29-12 13-15 MEAN QFF PRESSURE IN HPA 1025.0 ****** 1019.4 1012.1 1009.8 1004.0 ****** ****** 1010.8 1022.8 1025.7 1026.4 ****** MAX. QFF PRESSURE IN HPA 1036.3 ****** 1031.3 1022.4 1019.1 1009.8 ****** ****** 1018.0 1032.2 1035.8 1035.3 ****** DAY-HOUR 26- 6 **-** 7- 6 3- 6 3- 3 1-18 **-** **-** 30-18 14-18 18- 3 31- 6 MIN. QFF PRESSURE IN HPA 1005.7 ****** 1006.7 1002.0 1000.8 997.5 ****** ****** 999.8 1018.2 1019.5 1009.5 ****** DAY-HOUR 25- 3 **-** 24-18 29- 6 27-15 26-15 **-** **-** 3-15 17-18 26-15 13-15 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 854.5 855.4 856.0 852.0 853.1 850.4 849.0 850.3 854.1 858.7 859.4 856.6 854.1 MAX. QFE PRESSURE IN HPA 861.6 860.9 860.9 856.3 856.8 853.6 852.5 852.7 857.2 864.1 865.9 861.1 865.9 DAY 5 4 15 16 9 1 29 3 10 15 18 18 MIN. QFE PRESSURE IN HPA 839.3 849.9 850.1 846.0 848.2 847.3 844.1 847.4 848.0 856.0 854.2 849.5 839.3 DAY 25 1 26 29 27 3 20 16 3 18 29 27 MEAN QNH PRESSURE IN HPA 1022.2 1023.2 1024.0 1019.3 1020.6 1017.5 1015.8 1017.4 1021.8 1027.1 1028.0 1024.6 1021.8 MAX. QNH PRESSURE IN HPA 1030.4 1029.6 1029.6 1024.3 1024.9 1021.2 1019.9 1020.2 1025.4 1033.3 1035.4 1029.9 1035.4 DAY 5 4 15 16 9 1 29 3 10 15 18 18 MIN. QNH PRESSURE IN HPA 1004.6 1016.9 1017.1 1012.4 1014.9 1013.9 1010.2 1014.0 1014.7 1024.0 1021.9 1016.4 1004.6 DAY 25 1 26 29 27 3 20 16 3 18 29 27 MEAN QFF PRESSURE IN HPA 1025.1 1025.4 1020.0 1012.6 1010.7 1004.9 1002.6 1005.6 1012.0 1024.0 1026.8 1026.7 1016.4 MAX. QFF PRESSURE IN HPA 1036.2 1037.9 1030.4 1022.2 1019.1 1008.8 1007.4 1009.0 1017.1 1031.8 1035.8 1034.7 1037.9 DAY 26 4 7 3 3 1 30 27 30 15 18 31 MIN. QFF PRESSURE IN HPA 1005.7 1015.7 1008.6 1004.0 1003.4 1000.3 995.4 1001.5 1002.2 1020.4 1019.9 1017.1 995.4 DAY 25 19 25 29 28 3 20 11 3 18 25 27 ======================================================================================================================= 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 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 855.4 856.2 856.7 852.5 853.3 850.6 849.0 850.6 854.5 859.3 860.1 857.6 854.6 MAX. QFE PRESSURE IN HPA 862.9 861.6 862.1 857.2 857.0 853.7 852.5 852.7 857.8 864.7 866.4 862.9 866.4 DAY 5 4 15 16 8 1 29 14 9 15 18 31 MIN. QFE PRESSURE IN HPA 842.6 850.5 850.9 845.9 847.7 847.2 844.3 847.4 848.5 856.4 854.6 852.8 842.6 DAY 25 19 26 29 27 3 20 16 3 18 29 13 MEAN QNH PRESSURE IN HPA 1023.2 1024.3 1024.8 1020.0 1020.9 1017.7 1015.8 1017.7 1022.3 1027.8 1028.7 1025.8 1022.4 MAX. QNH PRESSURE IN HPA 1031.9 1030.4 1031.0 1025.4 1025.1 1021.3 1019.9 1020.2 1026.1 1034.0 1036.0 1031.9 1036.0 DAY 5 4 15 16 8 1 29 14 9 15 18 31 MIN. QNH PRESSURE IN HPA 1008.5 1017.6 1018.1 1012.3 1014.4 1013.8 1010.4 1014.0 1015.3 1024.4 1022.4 1020.3 1008.5 DAY 25 19 26 29 27 3 20 16 3 18 29 13 MEAN QFF PRESSURE IN HPA 1025.9 1026.3 1020.2 1012.6 1010.3 1004.6 1001.5 ****** 1011.2 1022.7 1025.9 1027.0 ****** MAX. QFF PRESSURE IN HPA 1036.3 1038.0 1031.3 1022.4 1017.9 1008.9 1005.9 ****** 1017.1 1031.5 1034.6 1035.3 ****** DAY 26 4 7 3 3 1 17 ** 30 15 18 31 MIN. QFF PRESSURE IN HPA 1009.9 1016.1 1009.7 1002.0 1003.0 999.3 995.6 ****** 1001.7 1019.2 1019.8 1018.0 ****** DAY 25 19 24 29 27 3 20 ** 3 18 25 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 854.2 855.5 855.5 851.8 852.4 849.6 848.1 849.5 853.4 858.1 858.7 856.3 853.6 MAX. QFE PRESSURE IN HPA 861.1 861.2 860.0 856.3 856.3 853.3 851.1 851.5 856.7 863.0 864.8 862.2 864.8 DAY 26 4 15 16 8 1 29 3 9 14 18 31 MIN. QFE PRESSURE IN HPA 844.0 850.8 849.7 845.3 846.7 845.9 843.3 846.2 847.2 855.4 853.4 849.8 843.3 DAY 25 12 31 29 27 3 20 16 3 18 25 13 MEAN QNH PRESSURE IN HPA 1021.9 1023.4 1023.4 1019.1 1019.8 1016.6 1014.8 1016.5 1021.0 1026.3 1027.0 1024.4 1021.2 MAX. QNH PRESSURE IN HPA 1029.9 1030.0 1028.6 1024.3 1024.3 1020.8 1018.3 1018.8 1024.8 1032.1 1034.1 1031.1 1034.1 DAY 26 4 15 16 8 1 29 3 9 14 18 31 MIN. QNH PRESSURE IN HPA 1010.1 1018.0 1016.7 1011.6 1013.2 1012.3 1009.3 1012.6 1013.8 1023.3 1021.0 1016.8 1009.3 DAY 25 12 31 29 27 3 20 16 3 18 25 13 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 853.3 854.2 854.0 850.4 851.0 848.5 847.0 848.1 852.0 856.8 857.4 855.4 852.3 MAX. QFE PRESSURE IN HPA 859.5 859.4 859.0 854.7 855.4 852.6 850.0 850.6 855.2 862.1 863.5 861.3 863.5 DAY 4 4 3 3 3 1 29 14 9 14 18 31 MIN. QFE PRESSURE IN HPA 844.6 849.5 848.2 844.3 845.4 844.8 842.3 844.6 846.1 854.0 852.0 847.2 842.3 DAY 31 12 31 29 27 3 20 16 3 18 29 13 MEAN QNH PRESSURE IN HPA 1020.8 1021.9 1021.6 1017.5 1018.2 1015.4 1013.6 1014.8 1019.3 1024.9 1025.6 1023.2 1019.7 MAX. QNH PRESSURE IN HPA 1028.0 1027.9 1027.4 1022.5 1023.3 1020.0 1017.0 1017.7 1023.0 1031.0 1032.6 1030.1 1032.6 DAY 4 4 3 3 3 1 29 14 9 14 18 31 MIN. QNH PRESSURE IN HPA 1010.8 1016.4 1014.9 1010.4 1011.7 1011.0 1008.1 1010.8 1012.5 1021.7 1019.3 1013.8 1008.1 DAY 31 12 31 29 27 3 20 16 3 18 29 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= 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 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 853.9 854.7 854.5 850.8 851.4 848.6 847.3 848.4 852.3 857.5 858.2 855.9 852.8 MAX. QFE PRESSURE IN HPA 860.3 860.1 859.4 854.9 854.9 852.8 850.6 850.8 855.5 862.8 863.6 861.7 863.6 DAY 4 4 9 15 8 1 29 3 9 14 18 31 MIN. QFE PRESSURE IN HPA 845.0 849.7 848.7 845.1 845.3 845.2 841.7 844.6 846.1 854.7 852.8 846.0 841.7 DAY 18 12 31 29 27 3 20 16 3 18 26 13 MEAN QNH PRESSURE IN HPA 1021.6 1022.5 1022.2 1018.0 1018.6 1015.5 1013.9 1015.2 1019.6 1025.7 1026.5 1023.9 1020.3 MAX. QNH PRESSURE IN HPA 1028.9 1028.7 1027.9 1022.7 1022.7 1020.3 1017.7 1018.0 1023.4 1031.8 1032.8 1030.6 1032.8 DAY 4 4 9 15 8 1 29 3 9 14 18 31 MIN. QNH PRESSURE IN HPA 1011.2 1016.7 1015.5 1011.4 1011.6 1011.5 1007.4 1010.8 1012.5 1022.5 1020.3 1012.4 1007.4 DAY 18 12 31 29 27 3 20 16 3 18 26 13 MEAN QFF PRESSURE IN HPA 1024.4 1024.5 1018.2 1011.1 1008.6 1002.8 1000.7 1003.4 1009.7 1022.5 1025.4 1025.9 1014.8 MAX. QFF PRESSURE IN HPA 1034.2 1036.7 1029.7 1019.5 1016.0 1007.9 1005.3 1006.4 1016.9 1030.6 1033.4 1035.3 1036.7 DAY 4 4 7 3 2 1 29 27 30 14 18 31 MIN. QFF PRESSURE IN HPA 1012.8 1013.9 1007.5 1002.2 1000.8 997.5 992.8 998.3 999.8 1019.2 1019.5 1009.5 992.8 DAY 18 18 25 28 27 26 20 9 3 18 26 13 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 854.6 855.9 855.8 852.0 852.8 850.0 848.2 ****** 853.7 858.6 859.2 856.9 ****** MAX. QFE PRESSURE IN HPA 861.2 860.8 860.6 856.2 856.5 854.2 851.1 ****** 856.7 864.6 865.4 862.0 ****** DAY 4 3 14 16 8 1 23 ** 30 14 17 31 MIN. QFE PRESSURE IN HPA 842.5 851.4 849.0 846.7 847.6 846.6 843.4 ****** 847.5 855.8 854.1 849.7 ****** DAY 18 18 31 28 27 25 20 ** 3 17 24 26 MEAN QNH PRESSURE IN HPA 1022.4 1023.8 1023.7 1019.3 1020.3 1017.1 1014.9 ****** 1021.3 1026.9 1027.7 1025.0 ****** MAX. QNH PRESSURE IN HPA 1030.0 1029.5 1029.3 1024.2 1024.5 1021.9 1018.3 ****** 1024.8 1033.9 1034.8 1030.9 ****** DAY 4 3 14 16 8 1 23 ** 30 14 17 31 MIN. QNH PRESSURE IN HPA 1008.4 1018.6 1015.9 1013.2 1014.3 1013.1 1009.4 ****** 1014.1 1023.7 1021.8 1016.7 ****** DAY 18 18 31 28 27 25 20 ** 3 17 24 26 MEAN QFF PRESSURE IN HPA 1024.9 1025.8 1019.2 1011.9 1009.6 1004.0 1001.1 ****** 1010.3 1021.9 1024.9 1026.1 ****** MAX. QFF PRESSURE IN HPA 1034.9 1036.1 1029.8 1021.3 1017.7 1009.8 1005.4 ****** 1018.0 1032.2 1033.4 1034.2 ****** DAY 4 6 7 2 2 1 17 ** 30 14 17 31 MIN. QFF PRESSURE IN HPA 1009.1 1016.0 1006.7 1002.5 1002.7 998.5 994.6 ****** 1001.3 1018.2 1019.7 1016.4 ****** DAY 24 18 24 28 27 3 20 ** 3 17 25 6 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 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 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.3 7.4 11.7 16.4 24.3 28.1 30.5 28.2 24.7 18.2 10.8 6.4 17.6 MINIMUN AIR TEMPERATURE (C) -2.3 0.4 3.9 7.7 14.6 18.6 20.0 18.1 13.4 6.4 1.5 -0.2 8.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 5 13 11 0 0 0 0 30 DAYS WITH MINIMUM TEMP. <=-4 12 7 2 0 0 0 0 0 0 0 0 6 27 DAYS WITH FREEZING MIN.<= 0 25 16 10 0 0 0 0 0 0 2 16 17 86 TEMPERATURE RECORDS LOWEST(C) -9.0 -7.0 -4.0 1.0 10.0 13.0 14.0 12.0 7.0 -3.0 -3.0 -7.0 -9.0 DAY 15 13 5 4 5 9 2 22 8 22 16 27 MAXIMUM AIR TEMPERATURE (C) 10.8 13.6 18.1 22.6 30.2 33.3 35.9 34.5 32.0 26.7 18.9 13.4 24.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 18 30 31 31 22 9 0 0 143 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.0 21.0 25.0 31.0 36.0 37.0 38.0 40.0 37.0 33.0 26.0 21.0 40.0 DAY 5 25 26 15 29 13 3 11 11 3 1 23 DIF. BETWEEN (MAX.-MIN.) (C) 13.1 13.2 14.2 14.9 15.6 14.7 15.9 16.4 18.6 20.3 17.4 13.6 15.7 MEAN DAILY TEMP. (MDT) (C) 4.3 7.0 11.0 15.1 22.4 26.0 27.9 26.3 22.7 16.6 10.2 6.6 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.5 58.0 149.0 215.0 163.5 58.0 6.5 0.0 0.0 650.5 HEATING DEG. DAYS(BASE 18 0C) 425.5 307.5 217.0 99.5 0.0 0.0 0.0 0.0 0.0 81.0 234.0 353.0 1717.5 DEWPOINT (MEAN C) -5.5 -5.2 -2.6 2.4 4.1 -0.1 1.8 1.0 -1.1 -4.3 -4.6 -2.8 -1.4 MIXING RATIO (G/KG) 3.16 3.21 4.01 5.69 6.22 4.58 5.35 5.02 4.31 3.50 3.29 3.81 4.35 VAPOUR PRESSURE (HPA) 4.33 4.38 5.47 7.73 8.44 6.21 7.23 6.79 5.87 4.78 4.52 5.22 5.91 SATURATION DEF. (HPA) 4.42 6.74 9.35 12.18 23.22 32.79 37.54 33.16 27.06 18.28 9.47 4.98 18.27 RELATIVE HUMIDITY (MEAN %) 53 44 41 45 30 17 17 18 20 24 37 56 34 RELATIVE HUMIDITY (MAX. %) 70 63 63 67 46 25 25 28 30 38 53 79 49 RELATIVE HUMIDITY (MIN. %) 37 29 25 28 20 12 12 13 13 14 24 37 22 RELATIVE HUMIDITY (MEAN% 03UTC) 65 59 58 64 45 25 25 27 29 34 50 73 46 RELATIVE HUMIDITY (MEAN% 09UTC) 41 33 29 33 22 13 13 14 14 16 26 39 24 RELATIVE HUMIDITY (MEAN% 15UTC) 56 43 39 43 26 16 16 16 19 26 42 60 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.6 10.9 40.7 52.6 8.1 0.0 0.0 0.0 0.0 4.0 16.5 26.0 195.4 DAYS WITH PRECIPITATION >=10 2 0 1 1 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 5 2 1 3 6 0 0 0 0 0 0 2 2 16 DAYS WITH PRECIPITATION >= 1 5 4 6 8 4 0 0 0 0 1 2 5 35 DAYS WITH PRECIPITATION 8 8 9 12 9 0 0 0 1 2 5 8 62 GREATEST DAILY PRECIPITATION 16.0 5.4 22.0 19.0 4.0 0.0 0.0 0.0 0.0 4.0 8.0 12.0 22.0 DAY 28 27 2 18 15 ** ** ** ** 15 29 20 DAY WITH THUNDER STORM 1 1 4 5 2 0 0 0 0 1 1 1 16 DAYS WITH SNOW OR SLEET 4 1 0 0 0 0 0 0 0 0 1 0 6 DAYS WITH DUST 0 1 0 1 0 4 4 7 1 0 0 1 19 WIND DIRECTION (PREVAILING) 90 270 270 135 90 90 90 90 90 135 270 270 90 PREVAILING WIND SPEED(KNOTS) 6.1 7.3 6.6 4.8 5.6 8.8 8.1 8.3 7.1 4.5 5.9 5.5 7.0 PREVAILING WIND PERCENT 10.2 21.4 11.3 11.7 17.2 32.8 30.1 36.0 18.9 15.1 13.9 10.8 16.6 CALMS PERCENT OF WIND 59.1 37.5 51.1 49.4 24.7 15.0 14.0 24.2 33.9 43.5 51.1 57.5 38.4 NO. OF WIND OBSERVATION 186 168 186 180 186 180 186 186 180 186 180 186 2190 VECTOR WIND DIRECTION (MEAN) 48 279 291 28 52 87 77 81 76 272 283 322 74 VECTOR WIND MAGNITUDE(KNOTS) 0.3 1.4 0.4 0.3 0.6 4.5 5.3 5.4 2.2 0.3 0.7 0.2 1.3 WIND STEADINESES (MEAN %) 13.0 37.8 12.9 11.1 12.2 64.3 74.6 83.1 48.9 10.0 25.0 7.7 31.0 WIND SPEED (MEAN KNOTS) 2.3 3.7 3.1 2.7 4.9 7.0 7.1 6.5 4.5 3.0 2.8 2.6 4.2 FASTEST WIND DIRECTION 290 270 160 100 290 270 80 130 30 270 130 180 160 FASTEST WIND SPEED (KNOTS) 12 15 20 12 18 20 20 20 20 15 15 15 20 DAY 6 26 13 9 13 5 14 3 5 5 29 19 DAYS WITH SKY CLEAR (0-2)/8 19 13 13 13 17 27 31 30 29 30 21 17 260 DAYS WITH P.CLOUDY (3-6)/8 6 14 12 13 11 3 0 1 1 1 7 9 78 DAYS WITH CLOUDY (7-8)/8 6 1 6 4 3 0 0 0 0 0 2 5 27 DAYS WITH VISIBILITY =< 2 KM 1 0 0 1 0 0 0 0 0 0 1 0 3 DURATION OF SUNSHINE HOURS 183.3 181.2 220.6 222.7 294.3 339.0 364.4 342.0 323.9 314.7 237.3 195.0 3218.4 ======================================================================================================================= 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 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 856.4 853.8 853.5 854.4 852.9 850.0 848.6 849.1 853.3 855.7 858.1 857.6 853.6 MAX. QFE PRESSURE IN HPA 865.7 861.3 860.7 861.5 859.0 853.9 852.5 854.0 861.3 861.8 864.2 863.1 865.7 DAY-HOUR 15- 6 18- 6 24- 6 4- 6 20- 6 17- 6 29- 3 18- 6 19- 6 25- 6 21- 6 17- 6 MIN. QFE PRESSURE IN HPA 849.2 843.6 844.8 846.0 847.4 845.8 845.0 842.4 846.3 849.0 844.8 850.8 842.4 DAY-HOUR 5-12 11-18 3- 3 24-12 7-15 30-12 17-12 14-12 9-12 4-12 29-12 23-12 MEAN QNH PRESSURE IN HPA 1024.4 1021.4 1021.1 1022.1 1020.4 1017.1 1015.4 1016.0 1020.8 1023.6 1026.4 1025.8 1021.2 MAX. QNH PRESSURE IN HPA 1035.2 1030.1 1029.4 1030.3 1027.4 1021.5 1019.9 1021.7 1030.1 1030.7 1033.4 1032.2 1035.2 DAY-HOUR 15- 6 18- 6 24- 6 4- 6 20- 6 17- 6 29- 3 18- 6 19- 6 25- 6 21- 6 17- 6 MIN. QNH PRESSURE IN HPA 1016.1 1009.6 1011.0 1012.4 1014.0 1012.2 1011.2 1008.2 1012.7 1015.9 1011.0 1018.0 1008.2 DAY-HOUR 5-12 11-18 3- 3 24-12 7-15 30-12 17-12 14-12 9-12 4-12 29-12 23-12 MEAN QFF PRESSURE IN HPA 1027.3 ****** 1018.8 1016.7 1010.2 1004.8 1001.8 1004.0 1011.2 1018.3 1025.4 1027.2 ****** MAX. QFF PRESSURE IN HPA 1041.5 ****** 1030.6 1029.1 1017.6 1008.7 1006.9 1012.5 1020.6 1029.3 1033.4 1037.5 ****** DAY-HOUR 15- 3 **-** 5- 6 4- 6 20- 6 6- 3 29- 3 30- 3 19- 6 21- 3 22- 3 25- 3 MIN. QFF PRESSURE IN HPA 1015.0 ****** 1008.6 1006.0 1003.0 1000.1 997.4 994.0 1003.7 1007.4 1009.1 1015.0 ****** DAY-HOUR 5-15 **-** 27-15 15-15 7-15 24-15 5-15 15-15 10-15 4-15 29-15 23-18 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 856.7 853.9 853.8 854.9 853.5 850.9 849.4 849.9 854.2 856.3 858.7 857.7 854.2 MAX. QFE PRESSURE IN HPA 865.0 860.7 860.0 860.7 858.8 853.6 852.5 853.8 860.8 861.2 863.4 862.9 865.0 DAY 15 18 24 8 20 17 29 18 19 21 21 25 MIN. QFE PRESSURE IN HPA 850.1 846.1 844.8 847.4 848.6 847.7 846.6 844.8 848.8 851.2 847.8 852.0 844.8 DAY 28 12 3 25 8 30 17 14 10 4 29 3 MEAN QNH PRESSURE IN HPA 1024.8 1021.5 1021.4 1022.7 1021.1 1018.1 1016.3 1017.0 1021.9 1024.3 1027.1 1026.0 1021.9 MAX. QNH PRESSURE IN HPA 1034.4 1029.4 1028.6 1029.4 1027.2 1021.2 1019.9 1021.4 1029.5 1030.0 1032.5 1031.9 1034.4 DAY 15 18 24 8 20 17 29 18 19 21 21 25 MIN. QNH PRESSURE IN HPA 1017.1 1012.5 1011.0 1014.0 1015.4 1014.4 1013.1 1011.0 1015.6 1018.4 1014.5 1019.3 1011.0 DAY 28 12 3 25 8 30 17 14 10 4 29 3 MEAN QFF PRESSURE IN HPA 1027.8 1022.2 1019.3 1017.5 1010.9 1005.7 1002.6 1004.9 1012.5 1019.5 1026.6 1027.7 1016.4 MAX. QFF PRESSURE IN HPA 1041.5 1032.7 1030.4 1028.9 1017.1 1008.7 1006.9 1012.5 1020.5 1029.3 1033.4 1037.5 1041.5 DAY 15 18 5 4 20 6 29 30 19 21 22 25 MIN. QFF PRESSURE IN HPA 1017.6 1009.5 1008.8 1008.5 1004.4 1001.6 999.9 997.2 1006.3 1009.9 1009.7 1016.6 997.2 DAY 28 11 27 21 8 25 5 14 10 4 29 24 ======================================================================================================================= 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 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 857.8 854.9 854.7 855.4 854.0 851.0 849.4 850.1 854.5 856.9 859.4 858.7 854.7 MAX. QFE PRESSURE IN HPA 865.7 861.3 860.7 861.5 859.0 853.9 852.4 854.0 861.3 861.8 864.2 863.1 865.7 DAY 15 18 24 4 20 17 28 18 19 25 21 17 MIN. QFE PRESSURE IN HPA 851.6 847.0 846.7 848.2 849.8 847.8 847.2 845.1 849.2 851.9 847.3 853.3 845.1 DAY 28 6 3 25 15 30 17 14 9 4 29 3 MEAN QNH PRESSURE IN HPA 1026.0 1022.7 1022.5 1023.3 1021.6 1018.1 1016.3 1017.2 1022.3 1025.0 1027.9 1027.1 1022.5 MAX. QNH PRESSURE IN HPA 1035.2 1030.1 1029.4 1030.3 1027.4 1021.5 1019.8 1021.7 1030.1 1030.7 1033.4 1032.2 1035.2 DAY 15 18 24 4 20 17 28 18 19 25 21 17 MIN. QNH PRESSURE IN HPA 1018.9 1013.6 1013.2 1014.9 1016.8 1014.5 1013.8 1011.4 1016.1 1019.2 1013.9 1020.8 1011.4 DAY 28 6 3 25 15 30 17 14 9 4 29 3 MEAN QFF PRESSURE IN HPA 1028.1 1022.7 1019.4 1017.1 1010.8 1005.4 1002.2 1004.3 1011.5 1018.4 1025.5 1027.7 1016.1 MAX. QFF PRESSURE IN HPA 1040.4 1031.4 1030.6 1029.1 1017.6 1008.7 1006.1 1011.2 1020.6 1028.5 1032.1 1036.4 1040.4 DAY 15 18 5 4 20 8 29 30 19 21 21 25 MIN. QFF PRESSURE IN HPA 1018.7 1010.9 1009.7 1008.0 1005.4 1001.5 999.5 996.6 1005.0 1008.3 1009.4 1017.5 996.6 DAY 28 11 19 15 8 25 9 14 10 4 29 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 856.3 853.9 853.8 854.5 853.1 850.0 848.4 849.0 853.1 855.6 858.0 857.5 853.6 MAX. QFE PRESSURE IN HPA 864.2 860.4 858.9 860.6 857.7 853.0 851.5 852.5 859.6 860.5 862.6 861.9 864.2 DAY 15 18 5 4 20 17 28 30 19 25 21 25 MIN. QFE PRESSURE IN HPA 851.0 845.8 847.4 848.7 849.1 846.4 846.4 843.8 847.8 850.5 845.3 852.1 843.8 DAY 28 6 3 25 15 30 17 14 9 10 29 23 MEAN QNH PRESSURE IN HPA 1024.3 1021.5 1021.4 1022.2 1020.7 1017.0 1015.2 1015.8 1020.6 1023.5 1026.3 1025.7 1021.2 MAX. QNH PRESSURE IN HPA 1033.4 1029.1 1027.3 1029.3 1025.9 1020.5 1018.8 1019.9 1028.1 1029.2 1031.6 1030.8 1033.4 DAY 15 18 5 4 20 17 28 30 19 25 21 25 MIN. QNH PRESSURE IN HPA 1018.2 1012.2 1014.0 1015.5 1016.0 1012.9 1012.9 1009.9 1014.5 1017.6 1011.6 1019.5 1009.9 DAY 28 6 3 25 15 30 17 14 9 10 29 23 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 855.1 852.6 852.3 853.2 851.8 848.9 847.4 847.8 851.8 854.3 856.9 856.5 852.4 MAX. QFE PRESSURE IN HPA 863.4 858.4 857.3 859.1 856.8 851.6 850.3 851.3 858.0 859.7 861.6 860.6 863.4 DAY 15 18 23 4 20 17 27 29 19 20 21 25 MIN. QFE PRESSURE IN HPA 849.2 844.6 846.0 846.0 847.8 845.8 845.0 842.4 846.3 849.0 844.8 850.8 842.4 DAY 5 6 3 24 7 30 17 14 9 4 29 23 MEAN QNH PRESSURE IN HPA 1022.9 1020.1 1019.7 1020.7 1019.1 1015.8 1014.1 1014.5 1019.1 1022.1 1025.0 1024.5 1019.8 MAX. QNH PRESSURE IN HPA 1032.5 1026.7 1025.5 1027.6 1024.9 1018.9 1017.4 1018.5 1026.3 1028.2 1030.4 1029.3 1032.5 DAY 15 18 23 4 20 17 27 29 19 20 21 25 MIN. QNH PRESSURE IN HPA 1016.1 1010.8 1012.4 1012.4 1014.5 1012.2 1011.2 1008.2 1012.7 1015.9 1011.0 1018.0 1008.2 DAY 5 6 3 24 7 30 17 14 9 4 29 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****