STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.1 10.2 15.2 23.8 29.4 30.0 30.0 28.3 24.4 22.1 14.3 8.2 20.4 MINIMUN AIR TEMPERATURE (C) 0.8 3.8 7.4 13.7 18.2 21.7 20.9 19.4 14.1 12.9 6.2 1.9 11.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 18 16 8 1 0 0 0 47 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 0 5 6 DAYS WITH FREEZING MIN.<= 0 16 1 1 0 0 0 0 0 0 0 1 11 30 TEMPERATURE RECORDS LOWEST(C) -4.0 0.0 -1.5 9.3 13.0 16.5 17.0 14.0 10.6 9.0 0.0 -10.0 -10.0 DAY 25 5 18 13 3 5 27 28 12 19 18 13 MAXIMUM AIR TEMPERATURE (C) 14.3 14.5 19.9 28.4 33.9 37.0 36.8 35.1 32.1 29.8 21.8 14.8 26.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 10 27 30 31 30 30 14 0 0 172 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 26.2 32.6 38.0 41.4 38.8 38.6 34.6 34.4 27.2 20.4 41.4 DAY 18 25 26 20 25 21 28 1 28 7 10 5 DIF. BETWEEN (MAX.-MIN.) (C) 13.5 10.7 12.5 14.7 15.7 15.3 15.9 15.7 18.0 16.9 15.6 12.9 14.7 MEAN DAILY TEMP. (MDT) (C) 7.5 9.1 13.6 21.1 26.1 29.4 28.9 27.3 23.1 21.3 14.0 8.4 19.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.3 20.6 157.1 250.7 243.5 194.2 63.3 43.2 0.0 0.0 974.2 HEATING DEG. DAYS(BASE 18 0C) 323.9 248.7 139.9 0.8 0.0 0.0 0.0 0.0 0.0 0.0 119.3 298.3 1130.9 DEWPOINT (MEAN C) -4.5 0.0 1.1 1.6 -2.1 2.3 -1.6 -3.3 -8.9 -3.0 -2.3 -3.3 -2.0 MIXING RATIO (G/KG) 3.38 4.66 5.03 5.28 4.03 5.84 4.52 3.90 2.47 3.65 4.05 3.91 4.23 VAPOUR PRESSURE (HPA) 4.64 6.37 6.87 7.20 5.51 7.90 6.13 5.30 3.38 5.03 5.56 5.38 5.77 SATURATION DEF. (HPA) 7.49 6.56 11.21 23.17 36.80 36.27 37.81 34.63 28.70 23.22 11.91 6.37 22.01 RELATIVE HUMIDITY (MEAN %) 42 55 42 26 14 21 16 14 12 20 37 50 29 RELATIVE HUMIDITY (MAX. %) 68 82 65 43 25 37 33 25 22 32 55 72 47 RELATIVE HUMIDITY (MIN. %) 27 38 28 17 9 9 8 8 5 11 20 27 17 RELATIVE HUMIDITY (MEAN% 03UTC) 65 81 65 43 25 32 25 21 18 30 51 65 43 RELATIVE HUMIDITY (MEAN% 09UTC) 33 44 34 20 10 12 9 10 7 13 24 33 21 RELATIVE HUMIDITY (MEAN% 15UTC) 38 50 36 23 11 13 10 11 8 17 31 39 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 26.0 71.2 7.0 3.5 0.0 0.4 0.0 0.0 0.0 0.5 9.0 3.4 121.0 DAYS WITH PRECIPITATION >=10 2 2 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 2 4 0 0 0 0 0 0 0 0 1 0 7 DAYS WITH PRECIPITATION >= 1 2 7 3 1 0 0 0 0 0 0 2 1 16 DAYS WITH PRECIPITATION 3 8 3 3 0 3 0 0 0 1 4 3 28 GREATEST DAILY PRECIPITATION 15.0 27.2 3.0 3.0 0.0 0.4 0.0 0.0 0.0 0.5 5.0 2.7 27.2 DAY 21 2 9 2 ** 7 ** ** ** 26 25 8 DAY WITH THUNDER STORM 1 0 0 1 0 4 0 0 0 0 0 0 6 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH DUST 4 1 11 11 13 17 15 8 4 3 1 4 92 WIND DIRECTION (PREVAILING) 180 180 270 270 270 45 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 14.9 14.3 14.8 15.1 12.9 12.9 13.9 12.4 10.8 7.2 9.1 8.6 11.5 PREVAILING WIND PERCENT 16.8 14.3 18.7 20.0 30.3 10.4 31.5 31.0 31.7 26.2 15.0 15.7 21.3 CALMS PERCENT OF WIND 56.1 55.7 34.8 49.3 31.6 42.1 38.3 28.2 35.8 38.3 50.4 42.3 41.1 NO. OF WIND OBSERVATION 155 140 155 150 155 240 248 248 240 248 240 248 2467 VECTOR WIND DIRECTION (MEAN) 203 186 234 245 299 332 295 316 299 300 238 225 272 VECTOR WIND MAGNITUDE(KNOTS) 2.9 2.3 3.6 3.3 4.2 1.6 5.0 4.7 4.1 2.7 2.1 2.7 2.4 WIND STEADINESES (MEAN %) 58.0 51.1 41.9 47.1 47.2 21.9 64.9 57.3 66.1 56.3 47.7 50.0 36.9 WIND SPEED (MEAN KNOTS) 5.0 4.5 8.6 7.0 8.9 7.3 7.7 8.2 6.2 4.8 4.4 5.4 6.5 FASTEST WIND DIRECTION 210 160 270 180 270 350 290 280 280 30 200 190 210 FASTEST WIND SPEED (KNOTS) 39 19 35 31 23 33 35 33 27 23 19 25 39 DAY 20 1 11 10 12 6 18 18 4 15 7 21 DAYS WITH SKY CLEAR (0-2)/8 25 14 12 14 23 13 25 27 30 29 23 15 250 DAYS WITH P.CLOUDY (3-6)/8 6 9 19 15 8 17 5 4 0 2 6 14 105 DAYS WITH CLOUDY (7-8)/8 0 5 0 1 0 0 1 0 0 0 1 2 10 DAYS WITH VISIBILITY =< 2 KM 2 1 2 1 2 4 6 7 1 0 0 2 28 DURATION OF SUNSHINE HOURS 251.1 193.2 234.1 205.1 338.1 249.0 242.0 300.4 325.1 301.1 248.9 211.4 3099.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.2 858.2 856.6 856.3 856.1 850.3 850.9 852.3 857.2 860.9 860.8 861.2 856.7 MAX. QFE PRESSURE IN HPA 865.6 864.2 863.4 862.2 860.4 858.0 854.4 857.2 862.1 867.0 865.9 865.8 867.0 DAY-HOUR 25- 6 22- 6 28- 6 4- 6 20- 6 2- 6 31- 3 29- 6 23- 6 20- 6 16- 6 22- 6 MIN. QFE PRESSURE IN HPA 851.9 851.9 851.1 850.9 851.2 844.9 845.5 847.3 852.6 856.5 854.3 857.2 844.9 DAY-HOUR 21- 6 16-12 9-12 24-12 11-12 20-12 18-12 4-12 5-12 1-12 7-12 10-12 MEAN QNH PRESSURE IN HPA 1017.0 1014.7 1013.0 1012.6 1012.3 1005.7 1006.5 1008.1 1013.7 1017.8 1017.7 1018.2 1013.1 MAX. QNH PRESSURE IN HPA 1023.3 1021.7 1020.7 1019.4 1017.3 1014.6 1010.4 1013.6 1019.3 1024.9 1023.6 1023.5 1024.9 DAY-HOUR 25- 6 22- 6 28- 6 4- 6 20- 6 2- 6 31- 3 29- 6 23- 6 20- 6 16- 6 22- 6 MIN. QNH PRESSURE IN HPA 1007.6 1007.6 1006.7 1006.4 1006.8 999.5 1000.2 1002.3 1008.4 1012.8 1010.3 1013.6 999.5 DAY-HOUR 21- 6 16-12 9-12 24-12 11-12 20-12 18-12 4-12 5-12 1-12 7-12 10-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 991.8 992.7 995.2 1003.2 1008.5 1012.6 1016.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.4 997.3 1003.1 1008.8 1017.0 1021.3 1023.7 ****** DAY-HOUR **-** **-** **-** **-** **-** 6- 3 24- 3 29- 3 22- 3 21- 3 16- 6 18- 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 984.0 986.1 988.9 998.2 1001.4 1003.4 1008.1 ****** DAY-HOUR **-** **-** **-** **-** **-** 21-12 18-12 4-12 5- 9 1-12 7-21 31- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 850.5 851.0 852.4 857.1 860.6 860.6 860.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 856.2 853.3 856.0 860.7 864.8 864.2 864.2 ****** DAY ** ** ** ** ** 2 31 30 23 21 16 24 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 846.0 847.6 848.9 853.8 856.8 856.6 857.6 ****** DAY ** ** ** ** ** 21 19 5 5 1 7 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.9 1006.6 1008.2 1013.6 1017.6 1017.5 1017.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1012.5 1009.2 1012.3 1017.6 1022.3 1021.7 1021.7 ****** DAY ** ** ** ** ** 2 31 30 23 21 16 24 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1000.8 1002.6 1004.1 1009.7 1013.2 1013.0 1014.1 ****** DAY ** ** ** ** ** 21 19 5 5 1 7 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 992.2 993.0 995.3 1003.1 1008.2 1012.2 1015.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 999.9 996.8 1001.2 1006.5 1014.6 1019.1 1020.8 ****** DAY ** ** ** ** ** 6 24 30 23 20 16 13 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 985.2 987.8 989.3 999.5 1001.5 1005.0 1008.1 ****** DAY ** ** ** ** ** 21 19 5 8 1 8 31 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.7 858.4 857.2 857.0 857.0 851.3 851.9 853.2 858.1 861.6 861.4 861.5 857.4 MAX. QFE PRESSURE IN HPA 864.6 862.5 862.0 861.4 860.3 857.3 854.4 856.9 861.4 865.7 865.1 864.1 865.7 DAY 1 22 28 5 20 2 31 29 23 21 29 22 MIN. QFE PRESSURE IN HPA 852.6 853.6 852.6 852.8 852.7 847.3 848.5 850.2 854.4 858.1 857.4 857.8 847.3 DAY 21 2 12 25 11 20 19 5 5 1 7 10 MEAN QNH PRESSURE IN HPA 1017.6 1015.1 1013.6 1013.4 1013.4 1006.9 1007.6 1009.1 1014.6 1018.7 1018.4 1018.6 1013.9 MAX. QNH PRESSURE IN HPA 1022.1 1019.7 1019.1 1018.5 1017.2 1013.8 1010.4 1013.3 1018.5 1023.4 1022.7 1021.5 1023.4 DAY 1 22 28 5 20 2 31 29 23 21 29 22 MIN. QNH PRESSURE IN HPA 1008.4 1009.5 1008.4 1008.6 1008.5 1002.3 1003.7 1005.6 1010.4 1014.7 1013.9 1014.3 1002.3 DAY 21 2 12 25 11 20 19 5 5 1 7 10 MEAN QFF PRESSURE IN HPA 1017.4 1013.5 1009.4 1004.8 1001.7 993.6 994.4 997.1 1005.3 1010.6 1014.5 1017.9 1006.7 MAX. QFF PRESSURE IN HPA 1024.7 1019.5 1016.4 1010.5 1007.6 1002.4 997.3 1003.1 1008.8 1017.0 1021.2 1023.7 1024.7 DAY 25 22 28 4 20 6 24 29 22 21 16 18 MIN. QFF PRESSURE IN HPA 1004.2 1006.0 1001.3 999.6 996.1 987.0 989.6 991.5 1001.2 1004.3 1008.4 1010.3 987.0 DAY 21 16 9 25 11 21 19 5 5 1 7 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.8 859.7 858.2 857.5 857.5 851.6 852.0 853.5 858.7 862.4 862.3 862.8 858.2 MAX. QFE PRESSURE IN HPA 865.6 864.2 863.4 862.2 860.4 858.0 854.4 857.2 862.1 867.0 865.9 865.8 867.0 DAY 25 22 28 4 20 2 31 29 23 20 16 22 MIN. QFE PRESSURE IN HPA 851.9 854.2 854.0 853.3 853.1 847.2 848.3 850.2 854.8 859.2 858.2 859.3 847.2 DAY 21 2 9 24 11 20 19 4 5 1 7 10 MEAN QNH PRESSURE IN HPA 1018.9 1016.5 1014.8 1014.0 1014.0 1007.2 1007.7 1009.4 1015.3 1019.6 1019.5 1020.0 1014.7 MAX. QNH PRESSURE IN HPA 1023.3 1021.7 1020.7 1019.4 1017.3 1014.6 1010.4 1013.6 1019.3 1024.9 1023.6 1023.5 1024.9 DAY 25 22 28 4 20 2 31 29 23 20 16 22 MIN. QNH PRESSURE IN HPA 1007.6 1010.2 1010.0 1009.2 1008.9 1002.2 1003.4 1005.6 1010.9 1015.9 1014.8 1016.0 1002.2 DAY 21 2 9 24 11 20 19 4 5 1 7 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 992.8 993.6 996.3 1004.2 1009.5 1014.0 1018.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.8 996.3 1002.0 1008.7 1016.4 1021.3 1023.7 ****** DAY ** ** ** ** ** 6 31 29 23 20 16 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 986.2 988.5 990.9 999.3 1003.6 1007.7 1011.4 ****** DAY ** ** ** ** ** 24 19 5 4 1 8 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.7 858.1 856.7 856.5 856.2 850.3 850.8 852.1 856.9 860.5 860.3 860.8 856.6 MAX. QFE PRESSURE IN HPA 863.6 862.5 862.0 860.8 858.8 856.6 853.7 855.6 860.1 865.4 864.0 864.1 865.4 DAY 25 22 28 5 21 2 31 29 22 20 16 22 MIN. QFE PRESSURE IN HPA 853.0 853.4 853.0 852.3 852.4 846.1 847.2 848.5 853.5 857.6 855.4 857.5 846.1 DAY 21 2 9 24 11 20 18 4 5 1 7 10 MEAN QNH PRESSURE IN HPA 1016.5 1014.7 1013.1 1012.8 1012.5 1005.8 1006.3 1007.8 1013.3 1017.5 1017.2 1017.7 1012.9 MAX. QNH PRESSURE IN HPA 1021.0 1019.7 1019.1 1017.8 1015.5 1013.0 1009.6 1011.8 1017.0 1023.0 1021.4 1021.5 1023.0 DAY 25 22 28 5 21 2 31 29 22 20 16 22 MIN. QNH PRESSURE IN HPA 1008.8 1009.3 1008.8 1008.0 1008.1 1000.9 1002.2 1003.7 1009.4 1014.1 1011.6 1014.0 1000.9 DAY 21 2 9 24 11 20 18 4 5 1 7 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 991.3 992.3 994.3 1002.2 1007.5 1011.4 1015.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.0 995.1 1000.1 1006.4 1014.4 1018.7 1020.3 ****** DAY ** ** ** ** ** 6 24 29 16 20 16 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 985.0 988.3 989.3 998.2 1002.1 1004.5 1008.2 ****** DAY ** ** ** ** ** 20 18 4 5 1 7 31 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.9 857.0 855.3 854.9 854.7 848.9 849.5 850.7 855.7 859.4 859.4 860.0 855.4 MAX. QFE PRESSURE IN HPA 862.8 861.2 859.8 859.1 857.5 854.0 852.5 854.0 859.3 864.1 863.1 863.0 864.1 DAY 25 22 27 5 21 6 31 24 22 20 15 23 MIN. QFE PRESSURE IN HPA 852.4 851.9 851.1 850.9 851.2 844.9 845.5 847.3 852.6 856.5 854.3 857.2 844.9 DAY 20 16 9 24 11 20 18 4 5 1 7 10 MEAN QNH PRESSURE IN HPA 1015.6 1013.4 1011.4 1011.1 1010.8 1004.1 1004.8 1006.2 1011.9 1016.1 1016.2 1016.8 1011.5 MAX. QNH PRESSURE IN HPA 1020.1 1018.2 1016.6 1015.8 1014.0 1010.0 1008.3 1010.0 1016.0 1021.5 1020.4 1020.3 1021.5 DAY 25 22 27 5 21 6 31 24 22 20 15 23 MIN. QNH PRESSURE IN HPA 1008.1 1007.6 1006.7 1006.4 1006.8 999.5 1000.2 1002.3 1008.4 1012.8 1010.3 1013.6 999.5 DAY 20 16 9 24 11 20 18 4 5 1 7 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 990.6 991.4 993.4 1001.4 1006.8 1011.0 1014.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 999.3 994.0 999.0 1005.3 1013.7 1017.5 1019.5 ****** DAY ** ** ** ** ** 6 31 29 17 20 16 13 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 984.0 986.1 988.9 998.5 1001.4 1003.9 1008.1 ****** DAY ** ** ** ** ** 21 18 4 8 1 7 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.9 857.6 855.8 855.5 855.0 849.2 849.8 851.2 856.3 860.2 860.3 861.0 856.0 MAX. QFE PRESSURE IN HPA 863.7 861.5 860.3 860.1 858.4 855.3 852.6 854.8 860.2 864.8 864.5 864.3 864.8 DAY 3 21 27 5 19 5 31 24 22 20 15 23 MIN. QFE PRESSURE IN HPA 853.7 852.8 851.2 851.4 851.7 845.2 846.0 847.6 853.1 857.6 854.8 858.4 845.2 DAY 20 16 11 24 10 20 18 4 4 9 7 30 MEAN QNH PRESSURE IN HPA 1016.7 1014.1 1012.0 1011.7 1011.1 1004.5 1005.1 1006.8 1012.6 1017.1 1017.2 1018.0 1012.3 MAX. QNH PRESSURE IN HPA 1021.1 1018.6 1017.2 1017.0 1015.0 1011.5 1008.4 1010.9 1017.1 1022.3 1022.0 1021.8 1022.3 DAY 3 21 27 5 19 5 31 24 22 20 15 23 MIN. QNH PRESSURE IN HPA 1009.6 1008.6 1006.8 1007.0 1007.3 999.9 1000.8 1002.6 1008.9 1014.1 1010.9 1015.0 999.9 DAY 20 16 11 24 10 20 18 4 4 9 7 30 MEAN QFF PRESSURE IN HPA 1016.6 1012.6 1007.8 1003.0 999.4 991.3 992.0 994.9 1003.2 1009.0 1013.3 1017.4 1005.0 MAX. QFF PRESSURE IN HPA 1023.6 1018.2 1014.7 1008.6 1006.1 1001.8 995.2 1000.0 1008.4 1015.4 1020.6 1022.7 1023.6 DAY 25 21 28 3 19 5 30 29 22 20 16 18 MIN. QFF PRESSURE IN HPA 1005.8 1004.8 999.7 997.5 995.1 985.6 987.0 989.8 1000.0 1003.7 1005.5 1010.8 985.6 DAY 20 16 11 30 10 21 18 5 4 8 7 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 850.5 851.3 852.9 857.8 861.3 861.1 861.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 855.8 853.4 856.4 861.1 865.6 865.3 865.1 ****** DAY ** ** ** ** ** 1 31 29 22 20 15 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 846.8 847.7 849.1 854.7 859.0 856.3 858.7 ****** DAY ** ** ** ** ** 20 18 4 4 9 7 9 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.9 1006.9 1008.7 1014.3 1018.3 1018.1 1018.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1012.0 1009.3 1012.7 1018.1 1023.3 1022.9 1022.7 ****** DAY ** ** ** ** ** 1 31 29 22 20 15 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.7 1002.8 1004.4 1010.8 1015.7 1012.6 1015.4 ****** DAY ** ** ** ** ** 20 18 4 4 9 7 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 991.8 992.8 995.6 1003.1 1008.3 1012.6 1017.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.0 995.9 1001.5 1007.6 1014.7 1020.5 1021.8 ****** DAY ** ** ** ** ** 5 23 29 22 20 16 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 986.0 988.2 989.5 999.4 1003.7 1004.5 1009.5 ****** DAY ** ** ** ** ** 19 18 4 4 7 7 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 850.3 851.3 852.7 857.4 861.0 860.8 861.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 856.0 853.2 856.2 860.8 865.0 864.5 864.8 ****** DAY ** ** ** ** ** 1 3 29 22 19 15 23 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 846.1 847.6 849.1 854.3 858.7 856.3 857.7 ****** DAY ** ** ** ** ** 20 18 4 4 9 7 9 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.8 1006.8 1008.5 1013.9 1018.0 1017.7 1018.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1012.3 1009.1 1012.5 1017.8 1022.6 1022.0 1022.3 ****** DAY ** ** ** ** ** 1 3 29 22 19 15 23 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1000.9 1002.6 1004.4 1010.3 1015.4 1012.6 1014.2 ****** DAY ** ** ** ** ** 20 18 4 4 9 7 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 991.3 992.6 995.1 1002.8 1008.1 1012.0 1016.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1000.3 996.6 1000.7 1006.8 1014.4 1019.5 1020.9 ****** DAY ** ** ** ** ** 5 23 31 22 19 15 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 984.7 988.1 989.2 998.8 1003.3 1003.4 1008.7 ****** DAY ** ** ** ** ** 20 18 4 8 9 7 30 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.5 12.6 15.8 21.8 25.9 29.2 30.3 30.0 27.0 18.9 14.5 10.6 20.5 MINIMUN AIR TEMPERATURE (C) 0.7 5.0 9.9 13.3 17.3 21.1 22.2 21.3 18.2 10.7 5.2 1.7 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 4 17 22 20 4 0 0 0 68 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 4 4 DAYS WITH FREEZING MIN.<= 0 18 4 0 0 0 0 0 0 0 0 0 10 32 TEMPERATURE RECORDS LOWEST(C) -3.6 -1.2 3.5 8.6 10.6 16.4 18.0 17.2 14.0 0.8 0.8 -7.0 -7.0 DAY 13 24 25 4 2 1 7 14 27 19 21 3 MAXIMUM AIR TEMPERATURE (C) 18.0 19.7 21.2 28.7 33.3 36.1 37.0 36.9 34.8 27.1 23.9 19.1 28.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 15 28 29 31 31 30 11 0 0 175 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.8 24.0 26.0 35.8 36.0 39.2 40.0 38.2 37.5 32.6 29.0 22.6 40.0 DAY 26 3 3 28 4 11 9 24 2 1 8 7 DIF. BETWEEN (MAX.-MIN.) (C) 17.3 14.7 11.3 15.4 16.0 15.0 14.8 15.6 16.6 16.4 18.7 17.4 15.8 MEAN DAILY TEMP. (MDT) (C) 9.3 12.4 15.6 21.0 25.3 28.6 29.6 29.1 26.5 18.9 14.6 10.4 20.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 46.0 132.6 228.0 267.1 252.2 160.4 26.1 0.0 0.0 1112.4 HEATING DEG. DAYS(BASE 18 0C) 268.4 158.1 79.4 10.8 0.0 0.0 0.0 0.0 0.0 41.2 102.4 236.7 896.9 DEWPOINT (MEAN C) -8.4 -7.1 1.9 -3.4 0.1 -3.4 0.2 0.2 -1.5 -4.0 -8.0 -9.1 -3.6 MIXING RATIO (G/KG) 2.59 2.93 5.41 3.79 5.06 3.86 4.83 4.91 4.34 3.62 2.53 2.72 3.88 VAPOUR PRESSURE (HPA) 3.56 4.03 7.38 5.19 6.90 5.26 6.56 6.66 5.93 4.98 3.48 3.75 5.31 SATURATION DEF. (HPA) 9.24 11.35 11.27 22.68 27.91 36.73 38.02 37.20 31.48 18.78 14.61 10.14 22.45 RELATIVE HUMIDITY (MEAN %) 32 30 45 23 22 14 16 17 17 23 23 31 24 RELATIVE HUMIDITY (MAX. %) 56 51 70 41 38 24 27 27 29 35 38 49 40 RELATIVE HUMIDITY (MIN. %) 15 14 26 11 10 8 9 9 10 14 12 15 13 RELATIVE HUMIDITY (MEAN% 03UTC) 50 44 64 38 33 21 23 25 27 34 32 45 36 RELATIVE HUMIDITY (MEAN% 09UTC) 20 19 31 14 13 9 10 10 11 16 14 18 15 RELATIVE HUMIDITY (MEAN% 15UTC) 22 19 38 16 17 11 12 12 13 19 18 23 18 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.0 19.0 45.9 0.4 22.2 0.3 0.2 0.2 0.0 0.0 0.0 22.0 110.2 DAYS WITH PRECIPITATION >=10 0 0 1 0 1 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 5 0 1 3 0 1 0 0 0 0 0 0 1 6 DAYS WITH PRECIPITATION >= 1 0 5 7 0 2 0 0 0 0 0 0 1 15 DAYS WITH PRECIPITATION 2 5 10 1 9 1 1 1 0 0 0 1 31 GREATEST DAILY PRECIPITATION 0.0 6.0 19.0 0.4 20.0 0.3 0.2 0.2 0.0 0.0 0.0 22.0 22.0 DAY ** 23 14 6 31 1 28 29 ** ** ** 31 DAY WITH THUNDER STORM 0 2 2 0 11 0 2 0 0 0 0 0 17 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 6 12 6 16 15 9 10 11 4 2 4 98 WIND DIRECTION (PREVAILING) 270 270 180 270 270 270 360 270 270 270 315 180 270 PREVAILING WIND SPEED(KNOTS) 8.3 11.0 14.5 10.2 11.1 8.5 12.2 10.6 7.2 9.0 5.7 11.7 9.4 PREVAILING WIND PERCENT 17.3 20.5 36.3 18.3 24.2 22.5 16.5 20.6 17.1 22.6 18.3 19.8 17.8 CALMS PERCENT OF WIND 50.4 31.7 28.2 35.4 36.3 36.7 35.5 34.3 38.8 40.3 48.8 44.8 38.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 244 233 199 237 260 330 337 284 341 297 299 204 263 VECTOR WIND MAGNITUDE(KNOTS) 2.4 4.3 6.3 3.4 2.3 3.8 3.2 3.0 1.9 3.0 1.9 2.4 2.1 WIND STEADINESES (MEAN %) 57.1 58.1 69.2 50.7 33.3 55.1 47.1 48.4 33.9 58.8 55.9 51.1 34.4 WIND SPEED (MEAN KNOTS) 4.2 7.4 9.1 6.7 6.9 6.9 6.8 6.2 5.6 5.1 3.4 4.7 6.1 FASTEST WIND DIRECTION 200 190 300 280 270 210 300 270 220 260 280 170 210 FASTEST WIND SPEED (KNOTS) 27 23 33 27 31 39 29 29 25 29 19 19 39 DAY 27 5 20 22 21 13 12 26 29 9 17 29 DAYS WITH SKY CLEAR (0-2)/8 27 18 14 21 12 28 27 22 28 28 26 20 271 DAYS WITH P.CLOUDY (3-6)/8 3 8 7 7 18 1 4 9 2 3 4 9 75 DAYS WITH CLOUDY (7-8)/8 1 2 10 2 1 1 0 0 0 0 0 2 19 DAYS WITH VISIBILITY =< 2 KM 1 2 3 1 4 7 8 3 6 2 0 2 39 DURATION OF SUNSHINE HOURS 265.4 250.7 202.1 311.6 269.1 344.4 340.2 301.3 297.9 292.0 269.2 244.2 3388.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 862.0 860.3 856.6 858.0 856.8 852.9 851.9 851.8 856.3 860.6 861.5 862.0 857.6 MAX. QFE PRESSURE IN HPA 867.2 866.1 862.2 862.7 860.8 857.4 856.8 857.1 861.4 865.1 867.4 867.4 867.4 DAY-HOUR 17- 6 1- 6 2- 6 17- 6 10- 6 1- 6 29- 6 7- 6 26- 6 24- 6 30- 6 2- 6 MIN. QFE PRESSURE IN HPA 855.3 855.1 849.6 854.4 851.7 848.0 848.0 847.4 851.9 855.2 856.4 855.5 847.4 DAY-HOUR 3-12 18-12 12-12 4-15 7-12 13-12 3-15 25-12 11-12 9-12 11-12 30-12 MEAN QNH PRESSURE IN HPA 1019.1 1017.2 1013.0 1014.6 1013.2 1008.8 1007.6 1007.5 1012.6 1017.5 1018.6 1019.1 1014.1 MAX. QNH PRESSURE IN HPA 1025.1 1023.8 1019.4 1019.9 1017.8 1013.9 1013.2 1013.5 1018.5 1022.7 1025.3 1025.3 1025.3 DAY-HOUR 17- 6 1- 6 2- 6 17- 6 10- 6 1- 6 29- 6 7- 6 26- 6 24- 6 30- 6 2- 6 MIN. QNH PRESSURE IN HPA 1011.5 1011.2 1004.9 1010.4 1007.3 1003.1 1003.1 1002.4 1007.6 1011.4 1012.7 1011.7 1002.4 DAY-HOUR 3-12 18-12 12-12 4-15 7-12 13-12 3-15 25-12 11-12 9-12 11-12 30-12 MEAN QFF PRESSURE IN HPA 1016.9 1013.2 1006.7 1005.3 1001.6 995.6 993.7 993.7 1000.5 1009.8 1013.5 1016.4 1005.6 MAX. QFF PRESSURE IN HPA 1025.0 1020.2 1016.0 1010.4 1008.2 1005.4 1000.8 999.5 1008.6 1018.5 1025.7 1029.2 1029.2 DAY-HOUR 17- 6 1- 6 23- 6 17- 3 1- 3 1- 3 28- 6 7- 3 27- 3 18- 3 30-18 2- 3 MIN. QFF PRESSURE IN HPA 1006.7 1006.3 996.5 999.6 995.2 989.8 988.5 988.4 994.0 999.6 1005.5 1005.6 988.4 DAY-HOUR 3-12 19- 0 12-12 20-12 29-15 13-12 3-18 25-15 2-12 9-18 10-12 31- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 861.6 860.1 856.2 857.7 856.7 853.1 851.9 851.9 856.1 860.4 861.2 861.9 857.4 MAX. QFE PRESSURE IN HPA 865.3 864.1 861.1 861.0 859.2 856.2 855.9 855.1 859.9 863.2 864.8 866.2 866.2 DAY 20 1 3 17 16 1 29 7 26 25 30 2 MIN. QFE PRESSURE IN HPA 855.8 856.4 851.8 854.7 853.3 849.6 849.5 849.0 853.5 856.5 857.6 855.6 849.0 DAY 3 19 13 5 23 13 4 25 11 10 11 31 MEAN QNH PRESSURE IN HPA 1018.7 1016.9 1012.5 1014.2 1013.0 1008.9 1007.6 1007.5 1012.4 1017.3 1018.2 1019.1 1013.9 MAX. QNH PRESSURE IN HPA 1022.9 1021.5 1018.1 1018.0 1015.9 1012.5 1012.1 1011.2 1016.7 1020.5 1022.3 1024.0 1024.0 DAY 20 1 3 17 16 1 29 7 26 25 30 2 MIN. QNH PRESSURE IN HPA 1012.0 1012.7 1007.5 1010.8 1009.2 1004.9 1004.8 1004.2 1009.4 1012.8 1014.1 1011.8 1004.2 DAY 3 19 13 5 23 13 4 25 11 10 11 31 MEAN QFF PRESSURE IN HPA 1016.1 1012.6 1006.0 1004.9 1001.6 996.0 993.8 993.8 1000.3 1009.4 1012.6 1016.0 1005.2 MAX. QFF PRESSURE IN HPA 1022.8 1017.4 1012.7 1008.2 1006.0 1004.4 999.5 997.3 1005.8 1016.7 1020.0 1026.1 1026.1 DAY 17 8 3 7 9 1 29 7 27 18 30 2 MIN. QFF PRESSURE IN HPA 1007.2 1006.3 998.8 1001.0 996.8 991.5 990.0 990.0 995.9 1001.8 1006.8 1005.6 990.0 DAY 3 19 13 20 30 13 4 26 1 10 10 31 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 862.2 860.8 856.9 858.6 857.6 853.9 852.8 852.8 857.0 861.3 862.0 862.5 858.2 MAX. QFE PRESSURE IN HPA 865.6 865.5 861.6 861.9 860.4 857.2 856.3 856.3 860.8 864.3 865.8 866.7 866.7 DAY 17 1 2 17 1 1 29 7 26 24 30 2 MIN. QFE PRESSURE IN HPA 856.5 857.4 852.8 855.4 854.3 850.3 850.9 850.0 854.1 857.4 858.7 856.3 850.0 DAY 3 19 12 5 23 13 4 25 11 9 10 31 MEAN QNH PRESSURE IN HPA 1019.4 1017.7 1013.3 1015.2 1014.1 1009.8 1008.6 1008.6 1013.4 1018.4 1019.1 1019.8 1014.8 MAX. QNH PRESSURE IN HPA 1023.3 1023.1 1018.7 1019.0 1017.3 1013.6 1012.6 1012.6 1017.8 1021.8 1023.5 1024.5 1024.5 DAY 17 1 2 17 1 1 29 7 26 24 30 2 MIN. QNH PRESSURE IN HPA 1012.8 1013.9 1008.6 1011.6 1010.3 1005.7 1006.4 1005.4 1010.1 1013.9 1015.4 1012.6 1005.4 DAY 3 19 12 5 23 13 4 25 11 9 10 31 MEAN QFF PRESSURE IN HPA 1018.4 1014.7 1007.8 1006.9 1003.2 997.1 995.1 995.7 1002.4 1011.9 1015.5 1018.3 1007.3 MAX. QFF PRESSURE IN HPA 1024.6 1019.9 1014.8 1010.4 1008.2 1005.4 1000.7 999.5 1008.6 1018.5 1023.4 1029.2 1029.2 DAY 17 1 23 17 1 1 29 7 27 18 30 2 MIN. QFF PRESSURE IN HPA 1008.7 1008.2 1001.1 1002.9 998.7 992.2 992.4 991.7 998.0 1004.3 1009.3 1008.1 991.7 DAY 3 11 20 5 29 13 4 25 3 10 11 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 863.7 861.9 857.9 859.5 858.1 854.2 853.0 853.2 857.7 862.1 863.1 863.6 859.0 MAX. QFE PRESSURE IN HPA 867.2 866.1 862.2 862.7 860.8 857.4 856.8 857.1 861.4 865.1 867.4 867.4 867.4 DAY 17 1 2 17 10 1 29 7 26 24 30 2 MIN. QFE PRESSURE IN HPA 857.6 858.1 853.5 856.9 855.0 850.4 851.2 850.8 854.9 857.8 859.6 858.2 850.4 DAY 3 18 12 5 7 13 3 25 2 9 11 31 MEAN QNH PRESSURE IN HPA 1021.1 1019.0 1014.5 1016.2 1014.6 1010.2 1008.9 1009.0 1014.2 1019.3 1020.4 1021.0 1015.7 MAX. QNH PRESSURE IN HPA 1025.1 1023.8 1019.4 1019.9 1017.8 1013.9 1013.2 1013.5 1018.5 1022.7 1025.3 1025.3 1025.3 DAY 17 1 2 17 10 1 29 7 26 24 30 2 MIN. QNH PRESSURE IN HPA 1014.1 1014.7 1009.4 1013.3 1011.1 1005.8 1006.8 1006.3 1011.0 1014.3 1016.4 1014.8 1005.8 DAY 3 18 12 5 7 13 3 25 2 9 11 31 MEAN QFF PRESSURE IN HPA 1018.7 1015.0 1008.0 1006.6 1002.6 996.9 994.7 994.9 1001.5 1011.1 1014.9 1018.1 1006.9 MAX. QFF PRESSURE IN HPA 1025.0 1020.2 1016.0 1009.6 1007.6 1004.7 1000.8 999.4 1006.3 1017.8 1025.1 1027.6 1027.6 DAY 17 1 23 1 1 1 28 7 26 17 30 2 MIN. QFF PRESSURE IN HPA 1009.9 1010.5 1001.2 1003.1 998.6 991.3 991.8 991.4 996.9 1002.9 1009.3 1010.3 991.3 DAY 3 11 12 29 29 13 4 25 2 9 11 30 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 861.7 860.3 856.9 858.4 856.8 853.1 852.0 851.9 856.2 860.3 861.2 861.6 857.5 MAX. QFE PRESSURE IN HPA 865.4 864.6 860.9 861.3 859.7 856.9 855.1 855.5 859.7 863.4 864.7 865.5 865.5 DAY 17 1 2 17 10 1 28 7 30 24 30 2 MIN. QFE PRESSURE IN HPA 855.7 856.7 851.5 856.3 853.2 849.8 850.0 849.4 853.5 856.2 857.8 856.7 849.4 DAY 3 18 12 5 7 13 3 25 10 9 10 31 MEAN QNH PRESSURE IN HPA 1018.8 1017.2 1013.3 1015.0 1013.2 1008.9 1007.7 1007.5 1012.5 1017.2 1018.3 1018.7 1014.0 MAX. QNH PRESSURE IN HPA 1023.0 1022.1 1017.9 1018.3 1016.5 1013.3 1011.2 1011.7 1016.5 1020.7 1022.2 1023.1 1023.1 DAY 17 1 2 17 10 1 28 7 30 24 30 2 MIN. QNH PRESSURE IN HPA 1011.9 1013.1 1007.1 1012.6 1009.1 1005.2 1005.4 1004.7 1009.4 1012.5 1014.3 1013.1 1004.7 DAY 3 18 12 5 7 13 3 25 10 9 10 31 MEAN QFF PRESSURE IN HPA 1016.0 1012.7 1006.6 1005.3 1001.1 995.3 993.4 993.3 999.6 1008.8 1012.3 1015.3 1005.0 MAX. QFF PRESSURE IN HPA 1023.0 1017.5 1013.9 1008.5 1005.9 1003.9 998.5 996.9 1004.0 1014.9 1021.4 1024.5 1024.5 DAY 17 1 23 1 1 1 28 7 25 17 30 1 MIN. QFF PRESSURE IN HPA 1009.0 1008.2 999.9 1000.8 997.4 991.3 990.7 990.1 995.0 1001.3 1007.1 1007.3 990.1 DAY 3 18 13 20 7 12 25 18 1 9 10 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 860.7 858.9 855.5 856.7 855.5 851.7 850.7 850.4 854.9 859.1 860.2 860.7 856.2 MAX. QFE PRESSURE IN HPA 864.1 863.5 860.1 859.4 857.8 855.7 853.9 854.3 858.9 862.4 863.8 864.5 864.5 DAY 17 1 2 16 17 1 29 7 26 24 30 2 MIN. QFE PRESSURE IN HPA 855.3 855.1 849.6 854.5 851.7 848.0 848.1 847.4 851.9 855.2 856.4 855.5 847.4 DAY 3 18 12 4 7 13 3 25 11 9 11 30 MEAN QNH PRESSURE IN HPA 1017.6 1015.5 1011.7 1013.1 1011.7 1007.3 1006.2 1005.9 1011.0 1015.9 1017.0 1017.6 1012.5 MAX. QNH PRESSURE IN HPA 1021.5 1020.9 1017.0 1016.2 1014.3 1011.9 1009.9 1010.3 1015.6 1019.6 1021.2 1022.0 1022.0 DAY 17 1 2 16 17 1 29 7 26 24 30 2 MIN. QNH PRESSURE IN HPA 1011.5 1011.2 1004.9 1010.5 1007.3 1003.1 1003.2 1002.4 1007.6 1011.4 1012.7 1011.7 1002.4 DAY 3 18 12 4 7 13 3 25 11 9 11 30 MEAN QFF PRESSURE IN HPA 1015.0 1011.2 1005.4 1003.8 1000.4 994.2 992.5 992.1 998.9 1008.0 1011.5 1014.5 1004.0 MAX. QFF PRESSURE IN HPA 1021.2 1015.7 1012.4 1008.1 1005.0 1002.0 997.1 995.9 1004.5 1014.5 1021.0 1023.8 1023.8 DAY 17 12 23 6 31 1 29 7 26 18 30 2 MIN. QFF PRESSURE IN HPA 1006.7 1006.6 996.5 999.6 995.4 989.8 989.6 988.5 994.0 1000.7 1005.5 1006.1 988.5 DAY 3 18 12 20 29 13 8 24 2 9 10 30 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 861.5 859.6 856.0 857.1 855.9 851.8 850.8 850.6 855.5 859.9 861.1 861.6 856.8 MAX. QFE PRESSURE IN HPA 865.2 864.4 860.7 859.9 859.2 855.6 854.5 854.1 859.5 862.9 865.7 865.1 865.7 DAY 17 1 2 16 24 1 28 7 26 24 30 2 MIN. QFE PRESSURE IN HPA 856.3 856.8 850.0 854.4 852.1 848.6 848.0 847.4 852.9 855.6 857.1 856.3 847.4 DAY 2 18 12 4 7 13 3 25 10 9 11 30 MEAN QNH PRESSURE IN HPA 1018.6 1016.4 1012.2 1013.5 1012.1 1007.5 1006.4 1006.0 1011.7 1016.7 1018.1 1018.7 1013.2 MAX. QNH PRESSURE IN HPA 1022.8 1021.9 1017.6 1016.7 1015.9 1011.8 1010.5 1010.1 1016.3 1020.2 1023.4 1022.7 1023.4 DAY 17 1 2 16 24 1 28 7 26 24 30 2 MIN. QNH PRESSURE IN HPA 1012.6 1013.2 1005.4 1010.4 1007.8 1003.8 1003.1 1002.4 1008.7 1011.8 1013.5 1012.6 1002.4 DAY 2 18 12 4 7 13 3 25 10 9 11 30 MEAN QFF PRESSURE IN HPA 1017.7 1013.3 1006.9 1005.2 1001.3 994.7 993.0 993.1 1000.7 1010.4 1014.6 1017.1 1005.7 MAX. QFF PRESSURE IN HPA 1023.3 1018.5 1014.0 1008.7 1005.8 1002.5 998.5 996.9 1006.6 1017.0 1025.1 1027.0 1027.0 DAY 17 1 23 6 24 1 28 7 26 17 30 1 MIN. QFF PRESSURE IN HPA 1009.1 1008.7 1000.1 1001.4 995.2 990.4 989.9 988.4 996.2 1002.3 1007.3 1007.8 988.4 DAY 3 18 12 29 29 12 3 25 2 9 11 30 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 862.3 860.6 857.0 858.2 857.1 853.2 852.1 852.0 856.8 860.9 861.9 862.2 857.9 MAX. QFE PRESSURE IN HPA 865.9 865.2 861.5 861.4 859.7 856.2 856.2 855.4 860.7 864.1 866.4 866.5 866.5 DAY 17 1 2 16 15 1 28 7 26 24 30 1 MIN. QFE PRESSURE IN HPA 856.3 857.4 851.8 854.8 852.8 849.3 848.5 849.0 854.2 855.9 858.0 857.0 848.5 DAY 2 10 12 4 6 12 3 25 10 9 11 30 MEAN QNH PRESSURE IN HPA 1019.5 1017.5 1013.4 1014.8 1013.6 1009.0 1007.8 1007.7 1013.1 1017.9 1019.0 1019.4 1014.4 MAX. QNH PRESSURE IN HPA 1023.6 1022.8 1018.6 1018.5 1016.5 1012.5 1012.5 1011.6 1017.6 1021.5 1024.2 1024.3 1024.3 DAY 17 1 2 16 15 1 28 7 26 24 30 1 MIN. QNH PRESSURE IN HPA 1012.6 1013.9 1007.5 1010.9 1008.6 1004.6 1003.7 1004.2 1010.2 1012.1 1014.6 1013.4 1003.7 DAY 2 10 12 4 6 12 3 25 10 9 11 30 MEAN QFF PRESSURE IN HPA 1017.2 1013.4 1006.9 1005.2 1001.6 995.6 993.7 993.6 1000.5 1009.9 1013.6 1016.4 1005.6 MAX. QFF PRESSURE IN HPA 1022.9 1018.7 1013.9 1009.2 1006.2 1002.6 999.7 997.5 1006.1 1017.0 1025.7 1027.0 1027.0 DAY 17 7 23 6 1 1 28 7 26 17 30 1 MIN. QFF PRESSURE IN HPA 1009.2 1007.6 999.0 1001.2 997.0 990.2 988.5 989.8 996.6 999.6 1007.2 1008.4 988.5 DAY 2 10 12 27 6 12 3 25 2 9 10 30 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 862.1 860.4 856.7 858.1 857.0 852.9 852.0 852.0 856.5 860.7 861.6 861.9 857.7 MAX. QFE PRESSURE IN HPA 865.6 864.8 861.4 861.4 859.8 855.7 856.7 855.3 860.3 863.7 866.2 866.2 866.2 DAY 17 1 2 16 15 27 28 7 30 24 30 1 MIN. QFE PRESSURE IN HPA 856.0 857.4 851.8 855.0 853.8 849.6 849.2 849.1 853.9 856.2 857.8 856.2 849.1 DAY 2 16 12 4 22 12 3 24 10 9 10 30 MEAN QNH PRESSURE IN HPA 1019.2 1017.3 1013.1 1014.7 1013.4 1008.8 1007.7 1007.6 1012.8 1017.6 1018.6 1019.0 1014.2 MAX. QNH PRESSURE IN HPA 1023.3 1022.3 1018.5 1018.5 1016.6 1011.9 1013.1 1011.5 1017.2 1021.1 1024.0 1024.0 1024.0 DAY 17 1 2 16 15 27 28 7 30 24 30 1 MIN. QNH PRESSURE IN HPA 1012.3 1013.9 1007.5 1011.1 1009.7 1004.9 1004.5 1004.4 1009.9 1012.5 1014.3 1012.5 1004.4 DAY 2 16 12 4 22 12 3 24 10 9 10 30 MEAN QFF PRESSURE IN HPA 1016.5 1012.7 1006.3 1004.9 1001.3 995.1 993.4 993.4 1000.0 1009.4 1012.9 1015.5 1005.1 MAX. QFF PRESSURE IN HPA 1022.5 1018.3 1012.7 1008.6 1006.2 1001.0 1000.0 997.4 1005.8 1016.2 1025.2 1025.3 1025.3 DAY 16 7 22 6 2 1 28 7 30 17 30 1 MIN. QFF PRESSURE IN HPA 1009.5 1007.1 998.3 1001.0 996.6 990.9 989.0 989.8 995.4 1000.6 1006.9 1006.4 989.0 DAY 2 10 12 20 29 12 3 25 2 9 9 30 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 10.9 16.4 22.0 28.4 31.6 31.3 29.1 28.4 22.9 17.3 13.3 21.7 MINIMUN AIR TEMPERATURE (C) 3.1 4.7 8.9 13.5 18.6 23.2 24.0 20.9 17.6 11.5 5.5 5.4 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 2 25 30 19 9 0 0 0 86 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH FREEZING MIN.<= 0 7 5 0 0 0 0 0 0 0 0 1 2 15 TEMPERATURE RECORDS LOWEST(C) -3.2 -2.0 1.4 6.4 12.0 18.0 20.4 16.0 9.2 6.4 -3.0 -5.6 -5.6 DAY 21 8 19 4 1 15 16 29 30 4 28 31 MAXIMUM AIR TEMPERATURE (C) 15.3 16.9 23.2 29.0 35.7 38.3 38.1 36.5 34.0 28.7 23.3 18.0 28.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 14 31 30 31 31 28 9 0 0 174 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.4 23.2 28.2 33.0 39.2 41.8 41.4 40.0 38.0 31.0 27.6 21.4 41.8 DAY 18 24 23 14 28 25 12 7 9 9 7 16 DIF. BETWEEN (MAX.-MIN.) (C) 12.2 12.2 14.3 15.5 17.1 15.1 14.1 15.6 16.4 17.2 17.8 12.6 15.0 MEAN DAILY TEMP. (MDT) (C) 9.2 10.8 16.0 21.2 27.1 30.8 31.1 28.7 25.8 20.1 14.4 11.7 20.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.3 44.6 190.5 293.7 311.7 237.9 142.2 9.4 0.0 0.0 1230.5 HEATING DEG. DAYS(BASE 18 0C) 272.1 207.9 73.9 7.6 0.0 0.0 0.0 0.0 0.0 3.6 109.8 196.2 870.9 DEWPOINT (MEAN C) -3.1 -2.1 -3.4 -1.4 0.8 2.7 8.1 2.1 0.1 -2.3 -5.0 -1.7 -0.4 MIXING RATIO (G/KG) 3.79 4.36 3.90 4.41 5.03 5.75 8.93 5.68 4.92 3.91 3.49 4.32 4.87 VAPOUR PRESSURE (HPA) 5.20 5.96 5.32 6.03 6.85 7.79 11.98 7.70 6.70 5.36 4.81 5.93 6.64 SATURATION DEF. (HPA) 6.89 7.66 14.40 21.85 33.68 40.29 35.14 34.00 33.87 23.92 16.46 9.95 23.18 RELATIVE HUMIDITY (MEAN %) 48 47 30 25 19 17 29 21 18 20 25 40 28 RELATIVE HUMIDITY (MAX. %) 75 70 49 39 31 26 52 35 30 32 40 60 45 RELATIVE HUMIDITY (MIN. %) 26 25 16 13 11 11 14 11 11 14 16 27 16 RELATIVE HUMIDITY (MEAN% 03UTC) 68 65 44 36 27 23 44 30 30 32 40 60 42 RELATIVE HUMIDITY (MEAN% 09UTC) 30 32 20 15 12 12 17 13 13 15 19 30 19 RELATIVE HUMIDITY (MEAN% 15UTC) 36 39 23 20 14 15 20 16 16 19 22 37 23 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 15.5 19.7 5.5 3.2 0.0 0.8 6.0 4.3 0.4 0.0 0.0 8.1 63.5 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH PRECIPITATION >= 5 2 2 1 0 0 0 1 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 1 3 5 1 1 0 0 1 1 0 0 0 2 14 DAYS WITH PRECIPITATION 4 6 3 2 0 1 3 5 2 0 0 3 29 GREATEST DAILY PRECIPITATION 8.0 7.0 5.1 3.1 0.0 0.8 6.0 3.0 0.2 0.0 0.0 5.0 8.0 DAY 27 17 3 28 ** 30 28 30 4 ** ** 10 DAY WITH THUNDER STORM 1 2 0 1 0 0 3 2 2 0 0 0 11 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 5 17 13 10 11 16 10 6 8 3 8 110 WIND DIRECTION (PREVAILING) 180 270 180 270 270 270 45 270 45 45 180 180 270 PREVAILING WIND SPEED(KNOTS) 11.9 8.0 13.2 9.3 7.1 8.2 9.8 8.3 9.7 10.4 9.1 13.4 8.5 PREVAILING WIND PERCENT 21.8 19.8 25.8 16.7 21.0 17.1 15.4 19.9 22.7 17.4 19.3 22.6 15.7 CALMS PERCENT OF WIND 50.0 42.2 26.6 38.3 37.1 34.2 34.8 37.8 23.3 37.4 40.0 32.3 36.6 NO. OF WIND OBSERVATION 248 232 248 240 248 240 247 246 150 155 150 155 2559 VECTOR WIND DIRECTION (MEAN) 201 218 216 235 270 320 2 317 10 352 230 193 245 VECTOR WIND MAGNITUDE(KNOTS) 2.7 2.1 4.9 2.7 2.0 1.8 1.6 2.0 2.8 1.2 2.1 3.7 1.3 WIND STEADINESES (MEAN %) 57.4 43.7 59.0 49.1 39.2 30.5 29.1 37.7 43.7 22.2 45.7 56.9 22.8 WIND SPEED (MEAN KNOTS) 4.7 4.8 8.3 5.5 5.1 5.9 5.5 5.3 6.4 5.4 4.6 6.5 5.7 FASTEST WIND DIRECTION 200 270 180 190 200 130 300 230 30 30 170 180 190 FASTEST WIND SPEED (KNOTS) 25 29 29 33 25 29 27 21 19 21 17 27 33 DAY 13 25 5 25 23 19 4 25 25 17 14 19 DAYS WITH SKY CLEAR (0-2)/8 21 12 19 17 31 21 9 25 28 30 23 15 251 DAYS WITH P.CLOUDY (3-6)/8 7 13 8 10 0 9 20 5 2 1 7 12 94 DAYS WITH CLOUDY (7-8)/8 3 4 4 3 0 0 2 1 0 0 0 4 21 DAYS WITH VISIBILITY =< 2 KM 0 0 6 5 2 2 12 2 1 2 1 0 33 DURATION OF SUNSHINE HOURS 221.3 209.6 266.5 271.9 354.0 316.4 284.0 290.8 307.6 311.5 271.6 202.4 3307.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.5 858.5 856.0 857.1 855.0 851.9 849.0 851.1 855.1 859.8 861.6 860.7 856.3 MAX. QFE PRESSURE IN HPA 867.8 863.8 860.4 863.6 859.6 858.8 852.6 855.9 859.9 864.8 866.6 866.9 867.8 DAY-HOUR 3- 6 7- 6 17- 6 12- 6 3- 6 1- 3 11- 6 31- 6 14- 6 17- 6 6- 6 3- 6 MIN. QFE PRESSURE IN HPA 853.4 854.7 845.6 852.3 851.4 846.3 845.3 846.5 851.1 854.6 855.5 856.1 845.3 DAY-HOUR 19-21 11-12 24- 3 24-12 30-15 24-12 4-12 1-12 1-12 6-12 1-12 26-12 MEAN QNH PRESSURE IN HPA 1016.3 1015.1 1012.3 1013.5 1011.1 1007.5 1004.2 1006.6 1011.2 1016.6 1018.7 1017.6 1012.6 MAX. QNH PRESSURE IN HPA 1025.8 1021.2 1017.3 1021.0 1016.4 1015.5 1008.4 1012.1 1016.7 1022.3 1024.4 1024.8 1025.8 DAY-HOUR 3- 6 7- 6 17- 6 12- 6 3- 6 1- 3 11- 6 31- 6 14- 6 17- 6 6- 6 3- 6 MIN. QNH PRESSURE IN HPA 1009.3 1010.8 1000.3 1008.0 1007.0 1001.2 1000.0 1001.4 1006.7 1010.7 1011.7 1012.4 1000.0 DAY-HOUR 19-21 11-12 24- 3 24-12 30-15 24-12 4-12 1-12 1-12 6-12 1-12 26-12 MEAN QFF PRESSURE IN HPA 1014.2 1011.9 1005.9 1004.0 998.3 992.9 989.4 993.3 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.1 1021.1 1013.8 1014.8 1005.8 1003.2 996.9 1001.6 ****** ****** ****** ****** ****** DAY-HOUR 3- 6 7-18 17- 3 4- 6 3- 3 1- 3 29- 3 31- 3 **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1004.0 1005.2 990.0 995.6 992.9 984.4 984.7 987.0 ****** ****** ****** ****** ****** DAY-HOUR 19-21 24-12 24- 0 24-12 23-21 26-12 13-12 8-12 **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.2 857.9 855.6 856.7 854.8 852.0 849.1 851.1 ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 865.2 860.8 858.3 861.7 858.2 857.7 851.8 854.9 ****** ****** ****** ****** ****** DAY 3 8 18 13 3 1 12 31 ** ** ** ** MIN. QFE PRESSURE IN HPA 853.8 855.2 845.9 853.6 852.7 847.4 847.3 847.6 ****** ****** ****** ****** ****** DAY 20 12 24 16 24 26 14 2 ** ** ** ** MEAN QNH PRESSURE IN HPA 1015.9 1014.5 1011.8 1013.1 1010.9 1007.6 1004.4 1006.7 ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1022.8 1017.8 1014.9 1018.8 1014.8 1014.2 1007.5 1011.0 ****** ****** ****** ****** ****** DAY 3 8 18 13 3 1 12 31 ** ** ** ** MIN. QNH PRESSURE IN HPA 1009.7 1011.4 1000.7 1009.5 1008.5 1002.4 1002.3 1002.6 ****** ****** ****** ****** ****** DAY 20 12 24 16 24 26 14 2 ** ** ** ** MEAN QFF PRESSURE IN HPA 1013.4 1011.0 1005.4 1003.9 998.4 993.3 989.6 993.4 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1020.7 1019.1 1011.2 1012.4 1003.5 1001.5 992.9 999.6 ****** ****** ****** ****** ****** DAY 3 8 26 4 3 1 20 31 ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.9 1006.4 990.0 997.8 994.8 985.0 986.7 988.9 ****** ****** ****** ****** ****** DAY 27 25 24 24 13 26 18 1 ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.8 858.8 856.5 857.7 855.9 852.9 849.8 851.9 856.0 860.5 862.3 861.1 856.9 MAX. QFE PRESSURE IN HPA 866.9 861.7 859.3 862.7 859.3 858.8 852.4 855.3 859.1 864.2 865.8 865.9 866.9 DAY 3 7 17 13 3 1 29 31 14 17 6 3 MIN. QFE PRESSURE IN HPA 854.8 856.0 845.6 854.5 853.4 848.3 847.7 848.3 853.6 856.3 857.3 856.6 845.6 DAY 20 12 24 1 30 26 18 2 8 7 1 26 MEAN QNH PRESSURE IN HPA 1016.7 1015.5 1012.8 1014.2 1012.1 1008.7 1005.2 1007.6 1012.2 1017.4 1019.4 1018.1 1013.3 MAX. QNH PRESSURE IN HPA 1024.8 1018.8 1016.0 1019.9 1016.0 1015.5 1008.1 1011.5 1015.8 1021.7 1023.5 1023.6 1024.8 DAY 3 7 17 13 3 1 29 31 14 17 6 3 MIN. QNH PRESSURE IN HPA 1010.9 1012.3 1000.3 1010.5 1009.3 1003.4 1002.8 1003.4 1009.5 1012.6 1013.8 1013.0 1000.3 DAY 20 12 24 1 30 26 18 2 8 7 1 26 MEAN QFF PRESSURE IN HPA 1015.4 1013.1 1007.4 1005.6 999.9 994.6 990.8 994.9 1001.4 1010.3 1015.6 1015.3 1005.4 MAX. QFF PRESSURE IN HPA 1024.9 1020.6 1013.8 1014.3 1005.8 1003.2 996.9 1001.6 1007.1 1014.1 1021.3 1026.1 1026.1 DAY 3 8 17 4 3 1 29 31 30 17 25 30 MIN. QFF PRESSURE IN HPA 1006.9 1008.7 990.9 999.8 995.9 986.5 987.5 990.4 996.0 1003.7 1007.9 1008.8 986.5 DAY 27 4 24 16 30 26 18 1 8 7 1 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.0 860.0 857.4 858.4 856.4 853.1 850.0 852.2 856.4 861.2 863.2 862.3 857.6 MAX. QFE PRESSURE IN HPA 867.8 863.8 860.4 863.6 859.6 858.8 852.6 855.9 859.9 864.8 866.6 866.9 867.8 DAY 3 7 17 12 3 1 11 31 14 17 6 3 MIN. QFE PRESSURE IN HPA 856.4 856.9 848.0 855.0 853.7 848.9 847.8 848.6 853.9 857.1 858.4 857.9 847.8 DAY 27 12 24 1 30 24 18 2 8 7 1 26 MEAN QNH PRESSURE IN HPA 1018.0 1016.9 1013.9 1015.0 1012.8 1009.0 1005.4 1007.9 1012.8 1018.3 1020.5 1019.5 1014.1 MAX. QNH PRESSURE IN HPA 1025.8 1021.2 1017.3 1021.0 1016.4 1015.5 1008.4 1012.1 1016.7 1022.3 1024.4 1024.8 1025.8 DAY 3 7 17 12 3 1 11 31 14 17 6 3 MIN. QNH PRESSURE IN HPA 1012.7 1013.3 1003.1 1011.1 1009.6 1004.1 1002.9 1003.8 1009.9 1013.5 1015.0 1014.4 1002.9 DAY 27 12 24 1 30 24 18 2 8 7 1 26 MEAN QFF PRESSURE IN HPA 1016.1 1013.5 1007.3 1005.0 999.3 994.2 990.3 994.2 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.1 1020.9 1012.9 1014.8 1004.4 1002.8 995.4 1000.7 ****** ****** ****** ****** ****** DAY 3 8 17 4 5 1 29 31 ** ** ** ** MIN. QFF PRESSURE IN HPA 1008.2 1008.4 994.9 999.4 993.8 987.3 986.7 989.5 ****** ****** ****** ****** ****** DAY 26 25 24 22 30 24 13 8 ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.4 858.6 856.1 857.2 855.3 852.1 849.0 850.9 854.9 859.4 861.1 860.3 856.2 MAX. QFE PRESSURE IN HPA 865.8 861.7 858.9 862.5 858.1 858.0 851.7 854.5 858.0 862.5 864.4 865.0 865.8 DAY 3 7 17 12 2 1 11 31 14 17 5 3 MIN. QFE PRESSURE IN HPA 855.2 856.0 849.0 853.9 852.9 847.6 847.1 848.0 852.6 855.4 856.5 856.2 847.1 DAY 22 12 24 1 30 24 4 1 2 7 1 26 MEAN QNH PRESSURE IN HPA 1016.2 1015.2 1012.3 1013.7 1011.5 1007.8 1004.2 1006.5 1011.0 1016.2 1018.1 1017.1 1012.5 MAX. QNH PRESSURE IN HPA 1023.5 1018.8 1015.6 1019.7 1014.7 1014.6 1007.3 1010.5 1014.6 1019.7 1021.9 1022.6 1023.5 DAY 3 7 17 12 2 1 11 31 14 17 5 3 MIN. QNH PRESSURE IN HPA 1011.4 1012.3 1004.2 1009.9 1008.7 1002.6 1002.1 1003.1 1008.4 1011.6 1012.8 1012.5 1002.1 DAY 22 12 24 1 30 24 4 1 2 7 1 26 MEAN QFF PRESSURE IN HPA 1013.5 1011.4 1005.5 1003.7 998.3 992.7 989.0 992.6 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1023.2 1017.7 1011.5 1012.4 1003.8 1001.3 993.3 998.0 ****** ****** ****** ****** ****** DAY 3 7 17 4 2 1 29 31 ** ** ** ** MIN. QFF PRESSURE IN HPA 1006.3 1006.0 996.0 997.7 994.4 986.0 985.3 987.8 ****** ****** ****** ****** ****** DAY 19 25 24 24 24 24 13 8 ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.3 857.3 854.9 855.8 853.8 850.7 847.6 849.7 853.8 858.5 860.2 859.4 855.0 MAX. QFE PRESSURE IN HPA 864.1 860.8 857.5 860.6 857.1 856.3 850.2 852.9 856.6 861.3 863.5 863.9 864.1 DAY 3 7 17 12 2 1 29 31 14 17 6 3 MIN. QFE PRESSURE IN HPA 854.1 854.7 849.9 852.3 851.5 846.3 845.3 846.5 851.1 854.6 855.5 856.1 845.3 DAY 22 11 24 24 12 24 4 1 1 6 1 26 MEAN QNH PRESSURE IN HPA 1014.9 1013.8 1011.0 1012.0 1009.8 1006.1 1002.7 1005.1 1009.7 1015.1 1017.1 1016.2 1011.1 MAX. QNH PRESSURE IN HPA 1021.5 1017.8 1014.0 1017.5 1013.5 1012.6 1005.6 1008.7 1013.0 1018.3 1020.9 1021.3 1021.5 DAY 3 7 17 12 2 1 29 31 14 17 6 3 MIN. QNH PRESSURE IN HPA 1010.1 1010.8 1005.3 1008.0 1007.1 1001.2 1000.0 1001.4 1006.7 1010.7 1011.7 1012.4 1000.0 DAY 22 11 24 24 12 24 4 1 1 6 1 26 MEAN QFF PRESSURE IN HPA 1012.4 1010.3 1004.6 1002.8 997.2 991.8 988.1 991.8 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1021.0 1017.1 1010.7 1010.2 1002.9 999.8 992.9 996.7 ****** ****** ****** ****** ****** DAY 3 7 17 4 2 1 29 31 ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.6 1005.2 997.3 995.6 993.6 984.4 984.7 987.0 ****** ****** ****** ****** ****** DAY 19 24 24 24 30 26 13 8 ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.2 858.1 855.5 856.3 853.9 850.8 847.9 850.2 854.4 859.5 861.2 860.5 855.6 MAX. QFE PRESSURE IN HPA 864.7 861.6 858.5 861.4 857.0 856.4 850.6 854.8 856.8 862.6 864.5 864.5 864.7 DAY 3 7 17 12 2 1 28 30 14 16 6 3 MIN. QFE PRESSURE IN HPA 854.8 855.5 851.7 853.0 851.4 846.4 845.6 846.5 851.3 855.3 856.8 857.0 845.6 DAY 19 11 23 24 30 24 13 1 1 7 1 7 MEAN QNH PRESSURE IN HPA 1015.9 1014.6 1011.7 1012.6 1009.8 1006.4 1003.0 1005.6 1010.4 1016.3 1018.2 1017.4 1011.8 MAX. QNH PRESSURE IN HPA 1022.2 1018.7 1015.1 1018.5 1013.4 1012.7 1006.1 1010.9 1013.2 1019.8 1022.0 1022.0 1022.2 DAY 3 7 17 12 2 1 28 30 14 16 6 3 MIN. QNH PRESSURE IN HPA 1010.9 1011.7 1007.3 1008.8 1007.0 1001.3 1000.3 1001.4 1006.9 1011.5 1013.2 1013.4 1000.3 DAY 19 11 23 24 30 24 13 1 1 7 1 7 MEAN QFF PRESSURE IN HPA 1014.6 1012.3 1006.2 1004.0 997.6 992.2 988.9 993.0 999.8 1009.0 1014.4 1014.6 1003.9 MAX. QFF PRESSURE IN HPA 1023.2 1019.9 1013.6 1011.6 1003.2 1000.3 994.1 1000.1 1006.6 1013.1 1020.4 1022.7 1023.2 DAY 3 7 17 3 2 1 28 30 30 28 25 30 MIN. QFF PRESSURE IN HPA 1005.7 1008.5 999.2 998.0 993.5 985.8 984.9 988.5 994.1 1002.7 1007.1 1008.8 984.9 DAY 19 25 10 23 30 25 13 1 2 7 1 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 859.9 858.9 856.4 857.4 855.2 851.8 849.2 851.5 ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 864.8 862.7 859.2 862.6 858.8 857.6 851.7 855.4 ****** ****** ****** ****** ****** DAY 3 7 17 12 2 1 10 30 ** ** ** ** MIN. QFE PRESSURE IN HPA 854.3 856.4 851.3 854.0 852.5 847.9 847.0 847.9 ****** ****** ****** ****** ****** DAY 19 11 23 15 23 24 13 1 ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.7 1015.6 1012.7 1013.9 1011.4 1007.5 1004.5 1007.1 ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1022.3 1019.9 1015.9 1019.8 1015.5 1014.1 1007.3 1011.6 ****** ****** ****** ****** ****** DAY 3 7 17 12 2 1 10 30 ** ** ** ** MIN. QNH PRESSURE IN HPA 1010.3 1012.7 1006.9 1010.0 1008.3 1003.0 1002.0 1003.0 ****** ****** ****** ****** ****** DAY 19 11 23 15 23 24 13 1 ** ** ** ** MEAN QFF PRESSURE IN HPA 1014.8 1012.3 1006.0 1003.9 997.9 992.7 989.6 993.4 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1023.5 1021.1 1012.0 1013.7 1003.9 1001.1 994.2 999.4 ****** ****** ****** ****** ****** DAY 3 7 25 3 2 1 28 30 ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.2 1007.4 996.6 997.6 993.1 986.1 985.9 988.9 ****** ****** ****** ****** ****** DAY 19 25 23 15 29 25 13 7 ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 859.5 858.5 856.1 857.1 855.0 851.7 849.1 851.4 ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 864.4 861.6 858.8 862.3 858.7 857.2 851.8 854.9 ****** ****** ****** ****** ****** DAY 2 7 17 12 2 1 19 30 ** ** ** ** MIN. QFE PRESSURE IN HPA 853.4 855.8 848.8 853.7 852.2 847.6 847.1 847.9 ****** ****** ****** ****** ****** DAY 19 11 23 1 23 25 17 1 ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.3 1015.1 1012.3 1013.5 1011.1 1007.4 1004.4 1007.0 ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1021.9 1018.7 1015.5 1019.5 1015.4 1013.6 1007.5 1011.0 ****** ****** ****** ****** ****** DAY 2 7 17 12 2 1 19 30 ** ** ** ** MIN. QNH PRESSURE IN HPA 1009.3 1012.0 1004.0 1009.6 1007.9 1002.6 1002.1 1003.0 ****** ****** ****** ****** ****** DAY 19 11 23 1 23 25 17 1 ** ** ** ** MEAN QFF PRESSURE IN HPA 1013.7 1011.3 1005.4 1003.5 997.8 992.3 989.0 993.1 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1021.9 1019.0 1011.2 1012.7 1003.4 1000.2 993.3 998.5 ****** ****** ****** ****** ****** DAY 3 7 15 3 2 1 19 30 ** ** ** ** MIN. QFF PRESSURE IN HPA 1004.0 1006.7 993.2 996.6 992.9 985.3 986.0 988.5 ****** ****** ****** ****** ****** DAY 19 25 23 23 23 25 3 8 ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 10.0 15.5 21.2 27.6 32.9 32.7 31.0 27.9 23.9 18.2 12.2 21.8 MINIMUN AIR TEMPERATURE (C) 0.2 2.2 8.0 12.1 17.1 23.0 23.0 20.3 15.3 11.8 8.1 4.1 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 7 24 25 11 1 0 0 0 68 DAYS WITH MINIMUM TEMP. <=-4 3 1 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH FREEZING MIN.<= 0 19 12 0 0 0 0 0 0 0 0 0 8 39 TEMPERATURE RECORDS LOWEST(C) -6.0 -5.0 2.0 3.6 4.4 16.0 18.0 14.0 7.6 7.5 4.4 -1.5 -6.0 DAY 21 7 1 1 3 17 7 29 25 16 28 27 MAXIMUM AIR TEMPERATURE (C) 13.9 14.6 19.7 25.5 32.4 37.2 37.4 36.1 33.7 29.7 23.6 16.4 26.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 6 24 30 31 31 28 15 0 0 165 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.4 22.4 25.5 31.8 38.7 39.4 39.6 38.1 36.2 33.0 28.0 20.8 39.6 DAY 28 21 11 20 29 12 15 18 7 4 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 13.7 12.4 11.7 13.4 15.3 14.2 14.4 15.8 18.4 17.9 15.5 12.3 14.6 MEAN DAILY TEMP. (MDT) (C) 7.1 8.4 13.9 18.8 24.7 30.1 30.2 28.2 24.5 20.8 15.8 10.2 19.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 16.3 144.9 272.5 284.3 222.3 111.3 22.7 0.0 0.0 1074.3 HEATING DEG. DAYS(BASE 18 0C) 338.7 268.8 131.3 37.9 13.2 0.0 0.0 0.0 0.0 1.1 66.9 240.4 1098.3 DEWPOINT (MEAN C) -7.4 -4.5 1.3 1.2 1.1 4.0 7.1 3.9 1.9 -1.3 0.9 -1.1 0.6 MIXING RATIO (G/KG) 2.77 3.54 5.20 5.21 5.42 6.46 8.00 6.22 5.42 4.18 4.84 4.50 5.15 VAPOUR PRESSURE (HPA) 3.80 4.86 7.09 7.11 7.38 8.74 10.78 8.42 7.38 5.73 6.65 6.17 7.01 SATURATION DEF. (HPA) 8.28 8.16 11.27 19.25 31.69 42.21 39.68 37.70 31.96 25.39 15.33 8.63 23.30 RELATIVE HUMIDITY (MEAN %) 34 41 44 31 20 18 23 20 20 20 33 44 29 RELATIVE HUMIDITY (MAX. %) 53 66 63 51 29 27 34 31 31 31 50 65 44 RELATIVE HUMIDITY (MIN. %) 22 27 33 20 16 13 16 13 14 15 23 31 20 RELATIVE HUMIDITY (MEAN% 03UTC) 52 63 61 47 28 24 33 31 31 31 49 65 43 RELATIVE HUMIDITY (MEAN% 09UTC) 26 32 38 24 17 14 18 14 15 16 25 35 23 RELATIVE HUMIDITY (MEAN% 15UTC) 31 39 42 31 20 20 22 18 18 19 31 40 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 11.0 39.4 45.8 9.1 0.0 0.7 1.4 0.0 0.0 0.0 0.0 10.2 117.6 DAYS WITH PRECIPITATION >=10 1 2 1 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 1 2 3 0 0 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 1 1 4 11 3 0 0 1 0 0 0 0 3 23 DAYS WITH PRECIPITATION 1 4 12 7 0 1 2 0 0 0 0 3 30 GREATEST DAILY PRECIPITATION 11.0 19.0 11.0 3.0 0.0 0.7 1.0 0.0 0.0 0.0 0.0 5.0 19.0 DAY 4 3 18 7 ** 2 6 ** ** ** ** 17 DAY WITH THUNDER STORM 0 0 1 3 0 0 1 0 0 0 0 0 5 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 7 8 6 2 12 17 16 12 5 2 2 1 90 WIND DIRECTION (PREVAILING) 180 270 180 180 360 360 360 360 360 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 12.0 10.6 9.8 10.0 9.9 13.2 11.9 10.3 10.0 6.6 7.5 10.7 9.6 PREVAILING WIND PERCENT 18.7 25.7 28.4 14.0 28.4 41.3 26.5 27.1 14.0 21.9 19.3 24.5 16.1 CALMS PERCENT OF WIND 32.3 30.0 32.9 28.0 20.0 21.3 25.2 24.5 45.3 35.5 37.3 35.5 30.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 218 249 212 225 356 4 347 328 3 272 229 196 294 VECTOR WIND MAGNITUDE(KNOTS) 3.1 3.2 3.6 1.4 3.7 6.8 4.5 3.6 1.8 1.6 2.8 3.6 1.4 WIND STEADINESES (MEAN %) 47.7 46.4 59.0 23.7 51.4 75.6 56.3 50.7 41.9 34.0 54.9 64.3 21.9 WIND SPEED (MEAN KNOTS) 6.5 6.9 6.1 5.9 7.2 9.0 8.0 7.1 4.3 4.7 5.1 5.6 6.4 FASTEST WIND DIRECTION 190 150 170 270 180 360 290 280 290 210 180 180 150 FASTEST WIND SPEED (KNOTS) 29 31 25 23 19 29 27 25 19 19 25 25 31 DAY 3 23 28 30 8 26 30 15 7 3 21 7 DAYS WITH SKY CLEAR (0-2)/8 24 18 17 7 27 29 26 23 28 30 18 15 262 DAYS WITH P.CLOUDY (3-6)/8 4 7 4 18 4 1 5 8 2 1 12 13 79 DAYS WITH CLOUDY (7-8)/8 3 3 10 5 0 0 0 0 0 0 0 3 24 DAYS WITH VISIBILITY =< 2 KM 0 5 5 1 5 7 14 6 2 0 0 1 46 DURATION OF SUNSHINE HOURS 238.4 224.3 214.5 242.4 342.3 330.9 303.4 326.7 302.3 296.5 257.6 219.2 3298.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 858.5 859.4 856.8 857.9 856.1 852.3 850.6 851.8 855.1 859.8 861.5 860.5 856.7 MAX. QFE PRESSURE IN HPA 864.1 864.9 862.3 862.1 859.6 863.1 854.1 855.1 861.8 866.0 866.1 866.0 866.1 DAY-HOUR 27- 6 8- 6 1- 6 4-15 5- 6 4-15 9- 6 31- 6 24- 6 27- 6 26- 6 3- 6 MIN. QFE PRESSURE IN HPA 852.1 852.3 852.9 851.0 851.0 848.5 847.9 847.1 851.0 855.5 858.3 855.8 847.1 DAY-HOUR 5- 3 23-12 21-12 23-12 29-12 7-12 23-12 1-12 12-12 1-12 24-12 23-12 MEAN QNH PRESSURE IN HPA 1015.2 1016.1 1013.1 1014.4 1012.4 1008.0 1006.1 1007.4 1011.2 1016.6 1018.6 1017.4 1013.0 MAX. QNH PRESSURE IN HPA 1021.5 1022.5 1019.5 1019.3 1016.4 1020.4 1010.1 1011.2 1018.9 1023.7 1023.8 1023.7 1023.8 DAY-HOUR 27- 6 8- 6 1- 6 4-15 5- 6 4-15 9- 6 31- 6 24- 6 27- 6 26- 6 3- 6 MIN. QNH PRESSURE IN HPA 1007.8 1008.0 1008.7 1006.5 1006.5 1003.7 1003.0 1002.1 1006.5 1011.7 1014.9 1012.0 1002.1 DAY-HOUR 5- 3 23-12 21-12 23-12 29-12 7-12 23-12 1-12 12-12 1-12 24-12 23-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 858.7 859.7 857.0 858.4 856.9 853.0 851.4 852.7 855.8 860.5 862.2 860.9 857.3 MAX. QFE PRESSURE IN HPA 862.3 863.0 861.5 861.5 859.2 855.8 853.8 854.8 861.1 864.9 864.9 865.0 865.0 DAY 10 8 1 1 5 2 8 31 23 27 29 1 MIN. QFE PRESSURE IN HPA 852.1 855.4 853.6 851.6 853.8 850.4 849.6 849.9 852.9 857.4 860.1 857.6 849.6 DAY 5 13 30 30 28 8 26 1 13 10 19 24 MEAN QNH PRESSURE IN HPA 1015.3 1016.5 1013.4 1015.0 1013.3 1008.8 1007.0 1008.5 1012.0 1017.4 1019.3 1017.9 1013.7 MAX. QNH PRESSURE IN HPA 1019.5 1020.3 1018.6 1018.6 1015.9 1012.0 1009.7 1010.9 1018.1 1022.5 1022.5 1022.6 1022.6 DAY 10 8 1 1 5 2 8 31 23 27 29 1 MIN. QNH PRESSURE IN HPA 1007.8 1011.6 1009.5 1007.2 1009.7 1005.8 1004.9 1005.3 1008.7 1013.9 1017.0 1014.1 1004.9 DAY 5 13 30 30 28 8 26 1 13 10 19 24 MEAN QFF PRESSURE IN HPA 1015.2 1015.7 1009.1 1007.7 1002.8 995.0 993.2 996.0 1001.9 1009.7 1014.5 1015.8 1006.4 MAX. QFF PRESSURE IN HPA 1021.2 1023.4 1017.5 1016.3 1012.6 998.7 998.7 1001.4 1011.7 1015.2 1020.0 1019.7 1023.4 DAY 20 8 1 1 2 2 7 31 24 27 30 2 MIN. QFF PRESSURE IN HPA 1004.2 1004.2 1004.0 999.7 996.2 992.1 990.6 992.7 997.1 1004.5 1010.7 1010.1 990.6 DAY 5 23 30 30 29 8 13 2 13 2 4 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 860.1 860.8 858.0 858.9 857.2 853.3 851.5 853.0 856.4 861.3 863.0 862.0 858.0 MAX. QFE PRESSURE IN HPA 864.1 864.9 862.3 861.8 859.6 856.4 854.1 855.1 861.8 866.0 866.1 866.0 866.1 DAY 27 8 1 1 5 2 9 31 24 27 26 3 MIN. QFE PRESSURE IN HPA 854.4 856.0 854.6 852.1 854.1 851.3 849.4 849.9 853.6 858.1 861.1 858.9 849.4 DAY 5 23 21 30 30 8 30 5 13 10 19 23 MEAN QNH PRESSURE IN HPA 1016.9 1017.8 1014.6 1015.6 1013.7 1009.2 1007.1 1008.8 1012.8 1018.3 1020.3 1019.1 1014.5 MAX. QNH PRESSURE IN HPA 1021.5 1022.5 1019.5 1018.9 1016.4 1012.7 1010.1 1011.2 1018.9 1023.7 1023.8 1023.7 1023.8 DAY 27 8 1 1 5 2 9 31 24 27 26 3 MIN. QNH PRESSURE IN HPA 1010.4 1012.3 1010.7 1007.8 1010.1 1006.9 1004.7 1005.3 1009.5 1014.7 1018.1 1015.6 1004.7 DAY 5 23 21 30 30 8 30 5 13 10 19 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 858.4 859.3 857.0 857.9 856.0 852.3 850.6 851.7 855.0 859.4 861.0 860.1 856.6 MAX. QFE PRESSURE IN HPA 863.0 863.1 861.1 861.1 858.5 855.8 853.2 853.7 859.7 863.9 864.1 863.7 864.1 DAY 27 8 1 4 4 2 9 31 23 27 26 3 MIN. QFE PRESSURE IN HPA 853.7 853.9 853.9 852.4 852.2 850.1 848.4 848.0 852.2 856.3 859.3 857.0 848.0 DAY 18 23 21 30 27 30 25 5 5 10 19 23 MEAN QNH PRESSURE IN HPA 1015.0 1016.0 1013.4 1014.4 1012.3 1008.1 1006.1 1007.3 1011.1 1016.2 1018.0 1017.0 1012.9 MAX. QNH PRESSURE IN HPA 1020.3 1020.4 1018.1 1018.1 1015.1 1012.0 1009.1 1009.6 1016.5 1021.3 1021.5 1021.1 1021.5 DAY 27 8 1 4 4 2 9 31 23 27 26 3 MIN. QNH PRESSURE IN HPA 1009.6 1009.9 1009.9 1008.1 1007.9 1005.5 1003.6 1003.1 1007.9 1012.6 1016.0 1013.4 1003.1 DAY 18 23 21 30 27 30 25 5 5 10 19 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 857.4 858.2 855.7 856.8 854.9 851.0 849.7 850.6 853.8 858.5 860.2 859.4 855.5 MAX. QFE PRESSURE IN HPA 861.5 862.0 859.5 860.0 857.6 853.8 852.2 852.8 858.7 863.0 863.2 863.0 863.2 DAY 27 8 1 4 4 2 9 31 23 27 26 1 MIN. QFE PRESSURE IN HPA 853.0 852.3 852.9 851.0 851.0 848.5 847.9 847.1 851.0 855.5 858.3 855.8 847.1 DAY 12 23 21 23 29 7 23 1 12 1 24 23 MEAN QNH PRESSURE IN HPA 1013.9 1014.7 1011.9 1013.1 1011.0 1006.6 1005.0 1006.0 1009.8 1015.1 1017.1 1016.1 1011.7 MAX. QNH PRESSURE IN HPA 1018.6 1019.1 1016.3 1016.8 1014.1 1009.7 1007.9 1008.6 1015.4 1020.3 1020.5 1020.3 1020.5 DAY 27 8 1 4 4 2 9 31 23 27 26 1 MIN. QNH PRESSURE IN HPA 1008.8 1008.0 1008.7 1006.5 1006.5 1003.7 1003.0 1002.1 1006.5 1011.7 1014.9 1012.0 1002.1 DAY 12 23 21 23 29 7 23 1 12 1 24 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 858.2 859.0 856.2 857.3 855.4 851.7 849.9 851.0 854.4 859.3 861.2 860.3 856.1 MAX. QFE PRESSURE IN HPA 862.1 862.9 859.9 862.1 858.2 863.1 852.3 853.2 860.0 864.2 864.0 863.8 864.2 DAY 27 8 31 4 4 4 6 31 23 27 26 2 MIN. QFE PRESSURE IN HPA 853.0 854.5 853.3 852.5 852.0 848.9 848.2 847.6 851.4 856.2 859.0 856.7 847.6 DAY 12 14 21 23 29 7 23 1 12 1 24 23 MEAN QNH PRESSURE IN HPA 1014.8 1015.7 1012.5 1013.8 1011.6 1007.4 1005.2 1006.6 1010.5 1016.1 1018.2 1017.2 1012.4 MAX. QNH PRESSURE IN HPA 1019.3 1020.2 1016.7 1019.3 1014.8 1020.4 1008.0 1009.1 1016.8 1021.7 1021.4 1021.2 1021.7 DAY 27 8 31 4 4 4 6 31 23 27 26 2 MIN. QNH PRESSURE IN HPA 1008.8 1010.5 1009.2 1008.3 1007.7 1004.1 1003.3 1002.6 1007.0 1012.5 1015.7 1013.1 1002.6 DAY 12 14 21 23 29 7 23 1 12 1 24 23 MEAN QFF PRESSURE IN HPA 1014.7 1014.8 1008.1 1006.5 1000.8 993.4 991.4 994.1 1000.3 1008.4 1013.3 1015.1 1005.1 MAX. QFF PRESSURE IN HPA 1020.9 1022.7 1014.1 1015.1 1010.5 1006.7 995.6 999.3 1009.5 1014.9 1018.3 1019.2 1022.7 DAY 27 8 1 4 2 4 6 31 23 27 29 25 MIN. QFF PRESSURE IN HPA 1006.8 1003.8 1003.3 999.2 993.5 989.8 989.1 989.8 995.5 1002.8 1009.8 1010.6 989.1 DAY 4 23 28 22 29 30 23 1 12 1 3 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.8 12.0 17.0 23.6 29.7 33.0 33.1 32.7 28.8 22.8 17.0 12.5 22.8 MINIMUN AIR TEMPERATURE (C) 5.0 5.5 7.3 13.8 19.7 21.5 22.4 21.7 16.2 10.9 5.8 4.3 12.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 11 20 21 20 1 0 0 0 75 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH FREEZING MIN.<= 0 2 3 2 0 0 0 0 0 0 0 0 4 11 TEMPERATURE RECORDS LOWEST(C) -1.2 -1.4 -0.6 8.4 15.4 17.4 17.4 18.4 10.4 4.0 1.8 -5.0 -5.0 DAY 31 2 22 3 1 2 19 17 27 21 29 30 MAXIMUM AIR TEMPERATURE (C) 14.4 16.2 22.2 28.5 34.3 37.5 38.0 38.0 34.7 28.5 23.0 17.5 27.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 16 31 30 31 31 29 10 0 0 179 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 23.2 30.6 33.0 39.0 41.8 41.4 40.6 37.4 33.4 28.0 22.4 41.8 DAY 9 4 14 15 26 29 3 12 2 5 12 8 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 10.7 14.9 14.7 14.6 16.0 15.6 16.3 18.5 17.6 17.2 13.2 14.8 MEAN DAILY TEMP. (MDT) (C) 9.7 10.9 14.7 21.1 27.0 29.5 30.2 29.8 25.5 19.7 14.4 10.9 20.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.7 43.6 187.3 255.9 284.3 274.2 129.2 16.5 0.0 0.0 1192.9 HEATING DEG. DAYS(BASE 18 0C) 257.1 200.0 113.0 9.6 0.0 0.0 0.0 0.0 0.0 13.3 107.8 219.4 920.0 DEWPOINT (MEAN C) 0.2 0.4 -5.6 -0.1 3.2 3.7 3.8 4.3 -0.3 -0.5 -3.4 -1.0 0.4 MIXING RATIO (G/KG) 4.79 4.95 3.18 4.70 5.89 6.10 6.34 6.52 4.56 4.48 3.63 4.38 4.96 VAPOUR PRESSURE (HPA) 6.57 6.76 4.36 6.41 8.01 8.25 8.55 8.81 6.22 6.14 4.99 6.01 6.76 SATURATION DEF. (HPA) 6.77 7.80 16.30 24.21 34.88 43.22 43.26 41.89 34.94 23.09 15.62 9.32 25.11 RELATIVE HUMIDITY (MEAN %) 52 50 24 25 21 17 17 19 16 23 27 43 28 RELATIVE HUMIDITY (MAX. %) 72 74 43 43 32 25 28 29 25 35 42 64 43 RELATIVE HUMIDITY (MIN. %) 38 34 14 15 14 12 12 12 10 16 19 30 19 RELATIVE HUMIDITY (MEAN% 03UTC) 71 71 43 40 32 25 26 28 24 34 42 64 42 RELATIVE HUMIDITY (MEAN% 09UTC) 43 40 17 18 15 13 13 14 12 18 21 34 22 RELATIVE HUMIDITY (MEAN% 15UTC) 49 48 21 23 21 16 18 17 16 23 27 40 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 58.5 55.4 2.4 11.5 2.5 0.0 0.0 0.0 0.0 0.0 1.5 15.0 146.8 DAYS WITH PRECIPITATION >=10 2 3 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 5 3 0 2 0 0 0 0 0 0 0 2 12 DAYS WITH PRECIPITATION >= 1 8 6 1 2 1 0 0 0 0 0 1 3 22 DAYS WITH PRECIPITATION 10 9 2 5 6 0 0 1 0 0 2 3 38 GREATEST DAILY PRECIPITATION 18.2 26.0 2.1 6.0 1.4 0.0 0.0 0.0 0.0 0.0 1.3 7.0 26.0 DAY 18 11 20 2 7 ** ** ** ** ** 2 28 DAY WITH THUNDER STORM 0 2 0 0 3 0 0 1 0 0 1 1 8 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH DUST 6 2 10 10 9 14 15 8 13 3 0 5 95 WIND DIRECTION (PREVAILING) 180 180 270 180 360 360 270 360 270 315 270 180 270 PREVAILING WIND SPEED(KNOTS) 11.7 11.0 11.0 12.4 12.2 11.0 13.1 9.5 10.0 6.0 6.1 10.5 9.8 PREVAILING WIND PERCENT 26.5 22.1 18.1 20.7 29.7 27.3 26.5 22.6 16.7 13.5 18.0 20.6 16.9 CALMS PERCENT OF WIND 23.9 28.6 29.7 25.3 20.6 21.3 20.0 32.3 46.0 41.9 51.3 37.4 31.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 198 206 237 227 11 325 303 340 328 298 279 216 275 VECTOR WIND MAGNITUDE(KNOTS) 4.1 3.2 2.3 4.6 3.3 5.4 4.0 2.9 2.1 1.4 1.5 3.0 1.7 WIND STEADINESES (MEAN %) 59.4 50.0 35.9 59.7 41.8 65.1 48.8 50.0 48.8 29.2 45.5 55.6 27.0 WIND SPEED (MEAN KNOTS) 6.9 6.4 6.4 7.7 7.9 8.3 8.2 5.8 4.3 4.8 3.3 5.4 6.3 FASTEST WIND DIRECTION 180 270 280 280 360 290 280 270 270 10 240 200 270 FASTEST WIND SPEED (KNOTS) 25 31 27 31 31 31 27 21 21 19 23 23 31 DAY 15 16 21 17 19 1 10 4 10 6 1 25 DAYS WITH SKY CLEAR (0-2)/8 17 13 20 14 20 25 27 26 30 31 26 20 269 DAYS WITH P.CLOUDY (3-6)/8 8 10 9 12 11 5 4 5 0 0 3 11 78 DAYS WITH CLOUDY (7-8)/8 6 5 2 4 0 0 0 0 0 0 1 0 18 DAYS WITH VISIBILITY =< 2 KM 3 5 4 2 4 2 4 2 0 1 1 0 28 DURATION OF SUNSHINE HOURS 191.8 208.5 289.6 287.3 333.1 343.3 ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.0 857.3 858.6 856.0 854.4 850.7 849.1 851.3 854.4 860.0 861.6 860.4 856.1 MAX. QFE PRESSURE IN HPA 864.3 864.1 864.9 861.0 857.9 855.5 853.9 855.0 859.2 866.0 867.2 867.8 867.8 DAY-HOUR 27- 6 1- 6 10- 6 3- 6 16- 6 9- 6 15- 6 16- 6 26- 6 19- 6 23- 6 5- 6 MIN. QFE PRESSURE IN HPA 854.8 847.5 852.5 851.0 850.2 845.6 844.2 846.0 849.9 854.7 854.9 855.0 844.2 DAY-HOUR 2-12 16-12 25-15 5-12 13-12 29-12 4-12 13-12 3-12 1-12 1-12 25-12 MEAN QNH PRESSURE IN HPA 1016.8 1013.7 1015.2 1012.2 1010.4 1006.2 1004.4 1006.9 1010.5 1016.8 1018.7 1017.3 1012.4 MAX. QNH PRESSURE IN HPA 1021.8 1021.5 1022.5 1018.0 1014.4 1011.7 1009.9 1011.1 1015.9 1023.7 1025.1 1025.8 1025.8 DAY-HOUR 27- 6 1- 6 10- 6 3- 6 16- 6 9- 6 15- 6 16- 6 26- 6 19- 6 23- 6 5- 6 MIN. QNH PRESSURE IN HPA 1010.9 1002.5 1008.3 1006.5 1005.6 1000.3 998.7 1000.8 1005.3 1010.8 1011.0 1011.1 998.7 DAY-HOUR 2-12 16-12 25-15 5-12 13-12 29-12 4-12 13-12 3-12 1-12 1-12 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.1 857.7 859.0 856.5 855.2 852.1 850.5 852.7 855.3 860.8 862.1 860.9 856.9 MAX. QFE PRESSURE IN HPA 863.4 863.7 863.4 859.8 857.6 855.0 853.5 854.8 858.8 865.0 866.4 866.8 866.8 DAY 27 1 10 3 16 2 15 16 26 19 24 5 MIN. QFE PRESSURE IN HPA 856.3 852.3 853.2 852.4 852.5 848.6 847.7 849.3 852.3 857.2 856.9 855.9 847.7 DAY 18 24 28 10 28 30 4 13 4 1 1 26 MEAN QNH PRESSURE IN HPA 1017.0 1014.2 1015.8 1012.8 1011.4 1007.8 1006.0 1008.5 1011.5 1017.8 1019.3 1017.9 1013.3 MAX. QNH PRESSURE IN HPA 1020.7 1021.1 1020.7 1016.6 1014.1 1011.1 1009.4 1010.9 1015.5 1022.6 1024.2 1024.6 1024.6 DAY 27 1 10 3 16 2 15 16 26 19 24 5 MIN. QNH PRESSURE IN HPA 1012.6 1008.0 1009.1 1008.1 1008.3 1003.8 1002.8 1004.6 1008.0 1013.6 1013.3 1012.1 1002.8 DAY 18 24 28 10 28 30 4 13 4 1 1 26 MEAN QFF PRESSURE IN HPA 1015.0 1011.7 1011.2 1004.2 999.4 994.2 992.1 995.1 1000.9 1010.7 1015.5 1015.7 1005.5 MAX. QFF PRESSURE IN HPA 1022.5 1022.0 1018.1 1011.1 1004.1 1000.7 996.2 998.7 1006.2 1017.7 1021.4 1023.6 1023.6 DAY 27 1 23 3 8 2 15 31 26 19 24 5 MIN. QFF PRESSURE IN HPA 1009.7 1004.4 1004.0 997.3 994.4 989.0 988.0 989.6 996.0 1005.5 1006.7 1007.2 988.0 DAY 2 24 28 30 28 30 4 13 3 2 1 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.4 858.7 859.9 857.1 855.5 852.1 850.4 852.9 855.8 861.5 863.1 861.8 857.5 MAX. QFE PRESSURE IN HPA 864.3 864.1 864.9 861.0 857.9 855.5 853.9 855.0 859.2 866.0 867.2 867.8 867.8 DAY 27 1 10 3 16 9 15 16 26 19 23 5 MIN. QFE PRESSURE IN HPA 857.0 853.0 854.5 853.2 852.5 848.9 847.5 849.0 852.7 858.1 857.4 857.8 847.5 DAY 2 24 3 10 28 30 4 13 3 1 1 26 MEAN QNH PRESSURE IN HPA 1018.5 1015.3 1016.8 1013.5 1011.7 1007.8 1005.8 1008.7 1012.0 1018.6 1020.4 1019.0 1014.0 MAX. QNH PRESSURE IN HPA 1021.8 1021.5 1022.5 1018.0 1014.4 1011.7 1009.9 1011.1 1015.9 1023.7 1025.1 1025.8 1025.8 DAY 27 1 10 3 16 9 15 16 26 19 23 5 MIN. QNH PRESSURE IN HPA 1013.4 1008.8 1010.5 1009.1 1008.3 1004.1 1002.5 1004.2 1008.5 1014.7 1013.9 1014.3 1002.5 DAY 2 24 3 10 28 30 4 13 3 1 1 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.7 857.3 858.6 856.1 854.4 850.5 848.9 851.0 854.2 859.6 861.2 860.1 856.0 MAX. QFE PRESSURE IN HPA 862.3 862.6 862.7 859.5 856.4 853.8 852.5 853.6 857.0 863.5 865.2 865.9 865.9 DAY 6 1 10 3 16 2 15 31 26 19 23 5 MIN. QFE PRESSURE IN HPA 854.9 850.9 853.4 852.3 851.5 847.0 845.8 846.6 851.4 856.3 855.7 856.6 845.8 DAY 2 16 3 10 13 29 2 13 3 1 1 25 MEAN QNH PRESSURE IN HPA 1016.5 1013.7 1015.3 1012.3 1010.4 1006.0 1004.1 1006.5 1010.2 1016.3 1018.2 1016.9 1012.2 MAX. QNH PRESSURE IN HPA 1019.5 1019.8 1019.9 1016.3 1012.7 1009.7 1008.3 1009.5 1013.4 1020.9 1022.8 1023.6 1023.6 DAY 6 1 10 3 16 2 15 31 26 19 23 5 MIN. QNH PRESSURE IN HPA 1011.0 1006.4 1009.3 1008.0 1007.1 1002.0 1000.6 1001.5 1007.0 1012.6 1011.9 1013.0 1000.6 DAY 2 16 3 10 13 29 2 13 3 1 1 25 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 858.9 856.1 857.3 854.9 853.2 849.2 847.5 849.5 853.1 858.6 860.4 859.3 854.8 MAX. QFE PRESSURE IN HPA 861.4 861.2 861.1 857.9 857.0 852.7 851.0 851.8 856.3 862.4 864.6 865.2 865.2 DAY 6 1 10 1 7 2 15 23 26 19 23 5 MIN. QFE PRESSURE IN HPA 854.8 847.5 852.6 851.0 850.2 845.6 844.2 846.0 849.9 854.7 854.9 855.0 844.2 DAY 2 16 3 5 13 29 4 13 3 1 1 25 MEAN QNH PRESSURE IN HPA 1015.6 1012.3 1013.8 1011.0 1009.1 1004.5 1002.5 1004.9 1009.0 1015.2 1017.3 1016.0 1010.9 MAX. QNH PRESSURE IN HPA 1018.5 1018.2 1018.1 1014.4 1013.4 1008.5 1006.5 1007.5 1012.6 1019.6 1022.1 1022.8 1022.8 DAY 6 1 10 1 7 2 15 23 26 19 23 5 MIN. QNH PRESSURE IN HPA 1010.9 1002.5 1008.4 1006.5 1005.6 1000.3 998.7 1000.8 1005.3 1010.8 1011.0 1011.1 998.7 DAY 2 16 3 5 13 29 4 13 3 1 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.8 856.7 858.0 855.4 853.7 849.8 848.3 850.6 853.8 859.5 861.2 860.1 855.6 MAX. QFE PRESSURE IN HPA 862.3 861.7 862.3 858.7 857.0 853.3 851.5 853.0 857.1 863.4 865.7 865.4 865.7 DAY 31 1 10 3 7 1 15 31 26 19 23 5 MIN. QFE PRESSURE IN HPA 855.0 850.3 852.5 851.5 850.3 846.4 844.8 847.2 851.1 855.8 855.8 855.4 844.8 DAY 2 24 25 5 13 30 4 13 2 1 1 25 MEAN QNH PRESSURE IN HPA 1016.6 1013.0 1014.5 1011.5 1009.6 1005.1 1003.4 1006.0 1009.8 1016.3 1018.3 1017.0 1011.8 MAX. QNH PRESSURE IN HPA 1019.5 1018.8 1019.5 1015.4 1013.4 1009.2 1007.1 1008.8 1013.5 1020.7 1023.4 1023.0 1023.4 DAY 31 1 10 3 7 1 15 31 26 19 23 5 MIN. QNH PRESSURE IN HPA 1011.1 1005.7 1008.3 1007.1 1005.7 1001.3 999.4 1002.2 1006.7 1012.0 1012.0 1011.6 999.4 DAY 2 24 25 5 13 30 4 13 2 1 1 25 MEAN QFF PRESSURE IN HPA 1014.7 1010.5 1009.9 1002.9 997.7 991.4 989.5 992.8 999.2 1009.0 1014.5 1014.9 1003.9 MAX. QFF PRESSURE IN HPA 1021.0 1019.4 1016.8 1010.4 1004.7 998.5 993.7 997.0 1004.6 1015.8 1020.3 1023.1 1023.1 DAY 31 1 23 1 7 1 15 31 27 19 23 28 MIN. QFF PRESSURE IN HPA 1007.8 1002.2 1002.5 996.5 992.8 986.4 982.2 988.1 994.1 1002.8 1005.6 1007.5 982.2 DAY 2 24 25 16 27 30 3 13 5 2 1 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.8 11.0 16.0 23.2 28.6 32.4 33.5 31.9 26.5 19.3 14.1 11.3 21.5 MINIMUN AIR TEMPERATURE (C) 3.2 3.9 8.6 13.7 18.3 20.5 22.4 19.8 15.6 10.3 6.0 4.9 12.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 8 17 20 10 0 0 0 0 55 DAYS WITH MINIMUM TEMP. <=-4 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH FREEZING MIN.<= 0 9 8 0 0 0 0 0 0 0 0 1 6 24 TEMPERATURE RECORDS LOWEST(C) -4.2 -4.6 1.5 8.8 13.0 15.0 18.0 12.8 9.2 4.4 -0.2 -3.2 -4.6 DAY 9 17 4 15 8 27 8 11 30 15 30 25 MAXIMUM AIR TEMPERATURE (C) 15.3 15.3 20.2 27.8 33.2 37.1 38.3 37.2 33.6 27.7 21.5 17.2 27.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 10 28 30 31 31 26 3 0 0 159 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.8 21.8 27.8 33.0 38.6 40.6 42.0 39.8 37.8 31.0 27.0 23.8 42.0 DAY 22 4 24 27 31 7 11 16 9 5 1 10 DIF. BETWEEN (MAX.-MIN.) (C) 12.1 11.4 11.6 14.1 14.9 16.6 15.9 17.4 18.0 17.4 15.5 12.3 14.7 MEAN DAILY TEMP. (MDT) (C) 9.3 9.6 14.4 20.8 25.7 28.8 30.3 28.5 24.6 19.0 13.7 11.1 19.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.2 33.3 146.8 234.3 289.5 233.5 115.8 2.6 0.0 0.0 1056.1 HEATING DEG. DAYS(BASE 18 0C) 271.1 234.5 125.0 8.1 0.0 0.0 0.0 0.0 0.3 11.0 127.5 215.2 992.6 DEWPOINT (MEAN C) -1.0 -2.6 4.0 1.1 3.7 1.6 2.5 2.6 -0.8 -3.8 -1.5 -1.2 0.4 MIXING RATIO (G/KG) 4.63 4.00 6.13 4.98 6.18 5.30 5.68 5.78 4.42 3.56 4.30 4.33 4.94 VAPOUR PRESSURE (HPA) 6.34 5.49 8.36 6.80 8.40 7.19 7.69 7.82 6.04 4.89 5.92 5.94 6.74 SATURATION DEF. (HPA) 7.27 8.37 10.69 22.82 31.74 43.04 45.14 40.90 30.97 18.78 11.11 8.40 23.27 RELATIVE HUMIDITY (MEAN %) 49 44 49 26 23 15 15 17 19 23 40 46 31 RELATIVE HUMIDITY (MAX. %) 76 75 76 44 39 25 23 26 28 35 60 69 48 RELATIVE HUMIDITY (MIN. %) 34 27 32 17 15 10 11 11 10 13 22 28 19 RELATIVE HUMIDITY (MEAN% 03UTC) 74 70 75 44 39 25 23 26 27 32 55 66 46 RELATIVE HUMIDITY (MEAN% 09UTC) 38 32 39 19 16 11 12 13 12 14 24 34 22 RELATIVE HUMIDITY (MEAN% 15UTC) 48 42 46 23 18 13 14 15 17 19 32 37 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.7 53.2 84.6 2.4 0.0 0.0 0.0 0.0 0.0 0.0 0.7 5.3 182.9 DAYS WITH PRECIPITATION >=10 2 2 3 0 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 5 3 2 5 0 0 0 0 0 0 0 0 0 10 DAYS WITH PRECIPITATION >= 1 6 3 6 1 0 0 0 0 0 0 0 1 17 DAYS WITH PRECIPITATION 9 4 9 2 0 0 0 0 0 0 3 3 30 GREATEST DAILY PRECIPITATION 12.0 38.2 37.0 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.7 4.4 38.2 DAY 28 9 1 1 ** ** ** ** ** ** 9 19 DAY WITH THUNDER STORM 1 0 5 2 0 0 0 0 1 0 2 0 11 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 6 8 9 13 7 11 10 5 2 1 5 79 WIND DIRECTION (PREVAILING) 270 180 180 270 270 270 360 270 270 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 10.1 10.4 11.2 11.6 12.3 11.0 9.8 9.4 8.2 5.0 3.9 11.3 8.3 PREVAILING WIND PERCENT 14.2 17.9 20.0 20.0 22.6 20.0 29.0 22.6 24.3 25.0 19.2 21.0 19.4 CALMS PERCENT OF WIND 40.0 37.9 43.2 38.0 25.2 24.7 23.9 30.3 38.7 47.6 50.8 39.1 37.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 173 248 240 248 2124 VECTOR WIND DIRECTION (MEAN) 196 224 201 256 225 319 344 319 308 295 266 206 258 VECTOR WIND MAGNITUDE(KNOTS) 2.2 3.3 3.1 3.1 4.9 3.0 3.6 3.0 2.4 1.4 0.9 3.1 1.8 WIND STEADINESES (MEAN %) 40.7 53.2 54.4 51.7 59.0 42.3 50.7 52.6 51.1 48.3 33.3 62.0 32.1 WIND SPEED (MEAN KNOTS) 5.4 6.2 5.7 6.0 8.3 7.1 7.1 5.7 4.7 2.9 2.7 5.0 5.6 FASTEST WIND DIRECTION 140 220 180 280 290 290 360 280 300 280 280 280 300 FASTEST WIND SPEED (KNOTS) 27 21 23 27 25 21 23 23 31 17 27 25 31 DAY 26 4 14 1 9 25 20 17 18 1 1 23 DAYS WITH SKY CLEAR (0-2)/8 13 12 11 18 19 30 30 30 28 31 20 12 254 DAYS WITH P.CLOUDY (3-6)/8 12 12 10 12 12 0 1 1 2 0 9 12 83 DAYS WITH CLOUDY (7-8)/8 6 4 10 0 0 0 0 0 0 0 1 7 28 DAYS WITH VISIBILITY =< 2 KM 5 3 6 3 10 1 3 1 0 0 0 2 34 DURATION OF SUNSHINE HOURS ****** 197.3 209.7 296.5 314.2 352.2 342.2 349.0 311.1 304.1 238.0 169.1 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.8 859.1 857.3 857.0 854.1 852.3 849.9 851.1 856.2 860.0 861.7 860.4 856.6 MAX. QFE PRESSURE IN HPA 866.1 867.5 862.5 862.3 858.0 857.2 854.4 854.6 861.8 864.0 866.7 866.6 867.5 DAY-HOUR 13- 6 15- 6 29- 6 16- 6 9- 6 22- 3 1- 6 31- 6 29- 6 19- 6 14- 6 7- 3 MIN. QFE PRESSURE IN HPA 853.6 853.7 851.2 851.3 849.5 847.6 845.8 848.5 851.4 856.3 857.2 854.3 845.8 DAY-HOUR 26- 9 8-12 7-12 12-12 28-15 12-12 14-15 16-12 7-12 14-12 5-12 26- 9 MEAN QNH PRESSURE IN HPA 1016.6 1015.9 1013.7 1013.4 1010.1 1008.0 1005.3 1006.7 1012.5 1016.9 1018.8 1017.3 1012.9 MAX. QNH PRESSURE IN HPA 1023.8 1025.4 1019.7 1019.5 1014.6 1013.6 1010.4 1010.7 1018.9 1021.4 1024.5 1024.4 1025.4 DAY-HOUR 13- 6 15- 6 29- 6 16- 6 9- 6 22- 3 1- 6 31- 6 29- 6 19- 6 14- 6 7- 3 MIN. QNH PRESSURE IN HPA 1009.5 1009.6 1006.8 1006.9 1004.8 1002.6 1000.6 1003.7 1007.0 1012.6 1013.6 1010.3 1000.6 DAY-HOUR 26- 9 8-12 7-12 12-12 28-15 12-12 14-15 16-12 7-12 14-12 5-12 26- 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1009.0 1013.7 1013.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.8 1020.7 1021.4 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 16- 3 14- 3 7- 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.1 1006.9 1008.1 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 5-12 7-12 26- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 859.8 861.4 860.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 862.5 864.9 865.1 ****** DAY ** ** ** ** ** ** ** ** ** 17 14 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 857.0 857.6 855.2 ****** DAY ** ** ** ** ** ** ** ** ** 5 9 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.7 1018.5 1016.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.7 1022.5 1022.7 ****** DAY ** ** ** ** ** ** ** ** ** 17 14 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.4 1014.1 1011.4 ****** DAY ** ** ** ** ** ** ** ** ** 5 9 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.7 1013.3 1013.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.3 1017.7 1017.8 ****** DAY ** ** ** ** ** ** ** ** ** 17 14 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.9 1007.2 1008.8 ****** DAY ** ** ** ** ** ** ** ** ** 6 9 23 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.2 859.4 857.9 857.6 855.0 853.1 850.7 851.9 856.8 860.8 862.4 860.7 857.2 MAX. QFE PRESSURE IN HPA 865.1 866.0 861.4 861.5 857.9 857.2 854.2 854.1 860.8 863.1 866.0 866.6 866.6 DAY 13 15 19 18 9 22 1 31 29 17 14 7 MIN. QFE PRESSURE IN HPA 855.1 855.4 854.5 852.2 852.0 849.8 848.5 850.0 853.4 858.0 858.4 855.2 848.5 DAY 26 8 3 13 23 12 14 1 8 5 9 26 MEAN QNH PRESSURE IN HPA 1017.1 1016.2 1014.4 1014.1 1011.1 1008.9 1006.2 1007.5 1013.2 1017.8 1019.6 1017.7 1013.6 MAX. QNH PRESSURE IN HPA 1022.7 1023.7 1018.5 1018.6 1014.4 1013.6 1010.2 1010.1 1017.8 1020.4 1023.7 1024.4 1024.4 DAY 13 15 19 18 9 22 1 31 29 17 14 7 MIN. QNH PRESSURE IN HPA 1011.2 1011.6 1010.5 1007.9 1007.7 1005.2 1003.7 1005.4 1009.3 1014.6 1015.0 1011.4 1003.7 DAY 26 8 3 13 23 12 14 1 8 5 9 26 MEAN QFF PRESSURE IN HPA 1015.8 1014.6 1009.6 1005.7 999.5 995.6 992.2 994.8 1003.1 1011.2 1015.7 1015.3 1006.1 MAX. QFF PRESSURE IN HPA 1024.2 1027.6 1017.8 1012.7 1004.8 1001.7 996.1 999.6 1011.7 1016.8 1020.7 1021.4 1027.6 DAY 13 15 18 16 9 22 1 23 29 16 14 7 MIN. QFF PRESSURE IN HPA 1005.3 1005.8 1004.2 999.2 994.1 990.8 988.7 991.6 997.9 1005.7 1009.2 1008.2 988.7 DAY 26 5 27 11 19 9 15 1 4 5 9 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.2 860.5 858.6 858.2 855.3 853.2 851.0 852.3 857.4 861.5 863.2 861.7 857.8 MAX. QFE PRESSURE IN HPA 866.1 867.5 862.5 862.3 858.0 857.2 854.4 854.6 861.8 864.0 866.7 865.8 867.5 DAY 13 15 29 16 9 22 1 31 29 19 14 7 MIN. QFE PRESSURE IN HPA 855.7 855.9 854.7 853.2 852.4 850.0 848.7 850.4 854.0 858.1 859.0 854.7 848.7 DAY 26 8 3 12 23 12 14 1 8 14 6 26 MEAN QNH PRESSURE IN HPA 1018.3 1017.4 1015.2 1014.8 1011.4 1009.1 1006.5 1008.0 1013.9 1018.6 1020.5 1018.7 1014.4 MAX. QNH PRESSURE IN HPA 1023.8 1025.4 1019.7 1019.5 1014.6 1013.6 1010.4 1010.7 1018.9 1021.4 1024.5 1023.5 1025.4 DAY 13 15 29 16 9 22 1 31 29 19 14 7 MIN. QNH PRESSURE IN HPA 1011.9 1012.1 1010.8 1009.1 1008.1 1005.4 1003.9 1005.8 1010.0 1014.7 1015.7 1010.8 1003.9 DAY 26 8 3 12 23 12 14 1 8 14 6 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1010.3 1014.9 1015.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.0 1019.6 1018.4 ****** DAY ** ** ** ** ** ** ** ** ** 16 14 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.8 1008.6 1008.2 ****** DAY ** ** ** ** ** ** ** ** ** 5 5 26 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.3 859.0 857.3 857.0 854.2 852.4 850.1 851.3 855.9 859.7 861.2 860.0 856.4 MAX. QFE PRESSURE IN HPA 863.6 866.1 861.1 860.9 856.7 856.3 853.3 853.7 859.7 862.0 864.4 863.8 866.1 DAY 12 15 18 16 9 22 1 30 29 16 14 7 MIN. QFE PRESSURE IN HPA 853.6 854.4 852.5 852.1 851.4 849.4 847.5 849.5 853.0 856.8 857.5 854.3 847.5 DAY 26 8 7 12 28 12 14 25 3 14 6 26 MEAN QNH PRESSURE IN HPA 1016.1 1015.7 1013.7 1013.4 1010.2 1008.1 1005.5 1006.8 1012.2 1016.5 1018.3 1016.8 1012.8 MAX. QNH PRESSURE IN HPA 1021.0 1023.8 1018.1 1017.9 1013.1 1012.6 1009.2 1009.6 1016.5 1019.1 1021.9 1021.2 1023.8 DAY 12 15 18 16 9 22 1 30 29 16 14 7 MIN. QNH PRESSURE IN HPA 1009.5 1010.4 1008.3 1007.8 1007.0 1004.7 1002.5 1004.8 1008.8 1013.2 1014.0 1010.3 1002.5 DAY 26 8 7 12 28 12 14 25 3 14 6 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.0 1012.7 1012.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.6 1016.8 1015.8 ****** DAY ** ** ** ** ** ** ** ** ** 16 14 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.1 1007.4 1008.1 ****** DAY ** ** ** ** ** ** ** ** ** 5 7 26 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.7 858.0 856.1 855.9 853.0 851.4 849.0 850.1 854.6 858.7 860.5 859.3 855.4 MAX. QFE PRESSURE IN HPA 862.8 865.3 860.2 859.1 856.1 854.8 852.2 852.6 858.8 860.9 863.6 863.4 865.3 DAY 12 15 5 15 9 22 1 31 29 16 13 7 MIN. QFE PRESSURE IN HPA 853.7 853.7 851.2 851.3 850.0 847.6 846.2 848.5 851.4 856.3 857.2 854.8 846.2 DAY 26 8 7 12 28 12 14 16 7 14 5 26 MEAN QNH PRESSURE IN HPA 1015.4 1014.5 1012.4 1012.1 1008.9 1007.0 1004.2 1005.5 1010.6 1015.4 1017.4 1016.1 1011.6 MAX. QNH PRESSURE IN HPA 1020.1 1022.9 1017.1 1015.8 1012.4 1010.9 1007.9 1008.4 1015.5 1017.9 1021.0 1020.7 1022.9 DAY 12 15 5 15 9 22 1 31 29 16 13 7 MIN. QNH PRESSURE IN HPA 1009.6 1009.6 1006.8 1006.9 1005.4 1002.6 1001.0 1003.7 1007.0 1012.6 1013.6 1010.9 1001.0 DAY 26 8 7 12 28 12 14 16 7 14 5 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1007.4 1012.3 1012.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.8 1016.2 1015.4 ****** DAY ** ** ** ** ** ** ** ** ** 16 13 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.1 1006.9 1008.2 ****** DAY ** ** ** ** ** ** ** ** ** 5 7 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.7 858.8 856.7 856.3 853.2 851.4 848.9 850.2 855.3 859.5 861.3 860.3 856.0 MAX. QFE PRESSURE IN HPA 864.5 866.0 860.8 859.6 856.1 854.3 852.4 853.3 859.4 861.7 865.1 865.5 866.0 DAY 12 15 18 17 8 22 1 31 28 16 13 6 MIN. QFE PRESSURE IN HPA 854.4 854.8 851.4 851.4 849.5 847.6 845.8 848.7 851.6 856.8 857.6 855.9 845.8 DAY 26 8 7 12 28 12 14 15 7 5 5 19 MEAN QNH PRESSURE IN HPA 1016.5 1015.5 1013.1 1012.6 1009.0 1007.0 1004.2 1005.7 1011.5 1016.2 1018.3 1017.2 1012.2 MAX. QNH PRESSURE IN HPA 1022.0 1023.7 1017.8 1016.4 1012.4 1010.3 1008.1 1009.2 1016.2 1018.8 1022.7 1023.1 1023.7 DAY 12 15 18 17 8 22 1 31 28 16 13 6 MIN. QNH PRESSURE IN HPA 1010.4 1010.9 1007.0 1007.0 1004.8 1002.6 1000.6 1003.9 1007.2 1013.2 1014.1 1012.1 1000.6 DAY 26 8 7 12 28 12 14 15 7 5 5 19 MEAN QFF PRESSURE IN HPA 1015.1 1013.9 1008.3 1004.3 997.5 993.7 990.2 992.9 1001.4 1009.6 1014.5 1014.8 1004.7 MAX. QFF PRESSURE IN HPA 1023.8 1028.0 1016.6 1011.3 1002.5 998.6 993.2 997.0 1010.2 1014.3 1018.6 1019.4 1028.0 DAY 12 15 18 15 8 21 2 30 30 16 13 6 MIN. QFF PRESSURE IN HPA 1004.6 1006.5 1000.1 997.8 992.7 988.9 986.2 990.0 995.2 1003.9 1009.7 1010.6 986.2 DAY 26 5 7 12 28 12 14 15 7 5 5 26 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 860.2 861.9 860.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 862.9 865.7 865.3 ****** DAY ** ** ** ** ** ** ** ** ** 16 13 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 857.5 858.0 855.9 ****** DAY ** ** ** ** ** ** ** ** ** 4 8 19 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1017.1 1019.0 1017.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.2 1023.4 1022.9 ****** DAY ** ** ** ** ** ** ** ** ** 16 13 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.0 1014.6 1012.1 ****** DAY ** ** ** ** ** ** ** ** ** 4 8 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.8 1013.5 1014.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.4 1018.6 1017.5 ****** DAY ** ** ** ** ** ** ** ** ** 16 13 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.4 1007.5 1010.8 ****** DAY ** ** ** ** ** ** ** ** ** 5 6 1 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 860.0 861.6 860.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 862.9 865.7 864.5 ****** DAY ** ** ** ** ** ** ** ** ** 16 13 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 857.5 857.6 855.5 ****** DAY ** ** ** ** ** ** ** ** ** 4 7 19 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.9 1018.7 1017.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.2 1023.4 1022.0 ****** DAY ** ** ** ** ** ** ** ** ** 16 13 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.0 1014.1 1011.7 ****** DAY ** ** ** ** ** ** ** ** ** 4 7 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1008.4 1013.1 1013.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.7 1018.3 1016.5 ****** DAY ** ** ** ** ** ** ** ** ** 16 13 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.4 1006.9 1008.1 ****** DAY ** ** ** ** ** ** ** ** ** 5 7 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.8 9.9 13.2 19.8 24.7 30.7 30.7 28.5 23.7 19.3 14.9 11.5 19.6 MINIMUN AIR TEMPERATURE (C) 2.8 3.5 6.2 12.6 16.5 20.7 21.7 20.4 14.0 10.5 5.8 5.4 11.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 4 15 20 16 0 0 0 0 56 DAYS WITH MINIMUM TEMP. <=-4 3 2 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 11 8 3 0 0 0 0 0 0 0 1 1 24 TEMPERATURE RECORDS LOWEST(C) -7.6 -4.2 -2.0 5.2 10.8 13.5 17.4 13.5 9.4 5.5 0.0 0.0 -7.6 DAY 11 17 1 10 4 3 17 17 11 24 21 12 MAXIMUM AIR TEMPERATURE (C) 12.7 16.0 19.1 25.8 32.0 37.8 37.9 35.6 31.5 27.5 24.0 17.1 26.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 8 24 30 31 31 25 5 0 0 154 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.6 23.5 24.0 32.5 37.0 40.4 40.0 38.5 34.0 32.0 28.0 22.8 40.4 DAY 16 25 15 26 23 26 7 26 26 4 13 17 DIF. BETWEEN (MAX.-MIN.) (C) 9.9 12.5 12.9 13.2 15.5 17.1 16.2 15.2 17.5 17.0 18.2 11.7 14.7 MEAN DAILY TEMP. (MDT) (C) 7.7 9.8 12.7 19.2 24.3 29.3 29.8 28.0 22.8 19.0 14.9 11.2 19.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 26.0 104.9 248.6 272.9 216.9 58.2 9.5 0.0 0.0 937.2 HEATING DEG. DAYS(BASE 18 0C) 318.5 239.1 167.7 26.7 0.0 0.0 0.0 0.0 0.0 15.4 93.4 210.0 1070.8 DEWPOINT (MEAN C) -1.4 -4.1 -3.8 2.4 5.1 6.2 4.5 2.0 -1.6 -1.1 -6.1 2.2 0.4 MIXING RATIO (G/KG) 4.41 3.75 3.77 5.47 6.69 7.43 6.57 5.59 4.18 4.48 3.03 5.43 5.07 VAPOUR PRESSURE (HPA) 6.04 5.13 5.15 7.46 9.10 10.04 8.88 7.58 5.72 6.13 4.18 7.45 6.91 SATURATION DEF. (HPA) 5.06 7.73 10.74 16.92 23.51 35.82 36.85 32.77 25.05 17.63 14.06 6.65 19.40 RELATIVE HUMIDITY (MEAN %) 57 44 35 35 31 24 21 20 21 29 27 57 33 RELATIVE HUMIDITY (MAX. %) 81 72 56 53 47 35 34 32 31 46 42 82 51 RELATIVE HUMIDITY (MIN. %) 35 23 20 21 18 14 13 11 11 15 13 36 19 RELATIVE HUMIDITY (MEAN% 03UTC) 74 65 50 49 40 31 27 29 29 43 38 76 46 RELATIVE HUMIDITY (MEAN% 09UTC) 40 30 24 24 22 18 14 13 12 17 16 42 23 RELATIVE HUMIDITY (MEAN% 15UTC) 50 33 27 28 25 19 15 16 17 24 21 45 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 49.3 33.4 8.5 7.7 0.8 0.0 0.4 0.0 0.0 16.2 0.0 139.6 255.9 DAYS WITH PRECIPITATION >=10 1 1 0 0 0 0 0 0 0 1 0 3 6 DAYS WITH PRECIPITATION >= 5 3 1 0 0 0 0 0 0 0 1 0 4 9 DAYS WITH PRECIPITATION >= 1 8 2 3 5 0 0 0 0 0 1 0 7 26 DAYS WITH PRECIPITATION 10 4 5 6 4 0 3 0 0 3 0 12 47 GREATEST DAILY PRECIPITATION 23.6 29.0 4.4 2.0 0.8 0.0 0.4 0.0 0.0 15.2 0.0 65.0 65.0 DAY 22 5 21 4 13 ** 13 ** ** 6 ** 31 DAY WITH THUNDER STORM 0 0 1 0 2 0 0 0 0 3 0 2 8 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 3 7 9 4 6 3 7 9 2 0 1 3 54 WIND DIRECTION (PREVAILING) 180 180 180 180 270 270 270 270 270 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 10.5 11.7 12.7 10.6 9.2 6.5 7.2 7.0 7.7 5.9 5.9 9.2 7.8 PREVAILING WIND PERCENT 24.2 25.4 25.4 19.2 28.6 17.5 18.5 16.1 15.0 16.1 12.1 17.3 16.5 CALMS PERCENT OF WIND 35.9 37.9 29.0 32.1 39.1 42.9 47.6 45.2 56.3 55.6 59.2 47.2 44.0 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 189 200 200 214 276 305 330 345 344 292 251 193 236 VECTOR WIND MAGNITUDE(KNOTS) 3.7 3.9 4.1 4.0 3.1 1.5 1.9 2.2 1.9 1.2 1.3 2.4 1.5 WIND STEADINESES (MEAN %) 68.5 62.9 56.2 62.5 56.4 35.7 47.5 51.2 55.9 40.0 50.0 57.1 31.9 WIND SPEED (MEAN KNOTS) 5.4 6.2 7.3 6.4 5.5 4.2 4.0 4.3 3.4 3.0 2.6 4.2 4.7 FASTEST WIND DIRECTION 180 270 180 150 150 20 270 300 280 120 210 200 200 FASTEST WIND SPEED (KNOTS) 25 29 31 31 27 19 21 31 23 16 17 33 33 DAY 1 16 10 19 13 23 25 20 9 7 28 28 DAYS WITH SKY CLEAR (0-2)/8 9 18 12 14 21 28 26 24 29 27 22 11 241 DAYS WITH P.CLOUDY (3-6)/8 13 8 9 15 8 2 5 4 1 4 8 14 91 DAYS WITH CLOUDY (7-8)/8 9 3 10 1 2 0 0 3 0 0 0 6 34 DAYS WITH VISIBILITY =< 2 KM 2 4 2 1 1 1 3 2 2 1 0 4 23 DURATION OF SUNSHINE HOURS 153.0 218.7 209.7 271.0 316.3 324.9 337.9 299.5 316.5 295.8 247.7 180.4 3171.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.0 857.8 857.7 856.5 856.2 852.5 850.3 852.5 856.1 859.4 861.9 861.1 856.8 MAX. QFE PRESSURE IN HPA 866.2 863.6 865.5 862.3 861.1 857.3 856.0 856.2 860.5 864.6 866.3 865.4 866.3 DAY-HOUR 10- 6 23- 6 13- 6 13- 6 13- 6 2- 6 6- 6 31-18 21- 6 29- 6 4- 6 12- 6 MIN. QFE PRESSURE IN HPA 855.6 852.9 851.2 850.2 852.6 846.2 846.4 848.0 850.5 854.8 856.2 857.3 846.2 DAY-HOUR 28-12 12- 0 24-18 19-12 4-12 27-12 19-15 18-12 9-12 5-12 26-12 19-12 MEAN QNH PRESSURE IN HPA 1016.8 1014.3 1014.2 1012.8 1012.5 1008.2 1005.7 1008.2 1012.4 1016.1 1019.0 1018.1 1013.2 MAX. QNH PRESSURE IN HPA 1024.0 1021.0 1023.1 1019.5 1018.1 1013.8 1012.3 1012.5 1017.4 1022.1 1024.1 1023.0 1024.1 DAY-HOUR 10- 6 23- 6 13- 6 13- 6 13- 6 2- 6 6- 6 31-18 21- 6 29- 6 4- 6 12- 6 MIN. QNH PRESSURE IN HPA 1011.8 1008.7 1006.8 1005.6 1008.4 1001.0 1001.3 1003.1 1006.0 1010.9 1012.5 1013.8 1001.0 DAY-HOUR 28-12 12- 0 24-18 19-12 4-12 27-12 19-15 18-12 9-12 5-12 26-12 19-12 MEAN QFF PRESSURE IN HPA 1015.4 1011.6 1009.7 1004.5 1001.4 993.9 991.4 995.2 1002.0 1008.2 1013.6 1014.4 1005.1 MAX. QFF PRESSURE IN HPA 1026.7 1020.8 1023.2 1012.0 1008.4 1001.1 997.1 1000.9 1006.7 1015.4 1019.5 1022.5 1026.7 DAY-HOUR 10-18 13- 6 13- 6 12- 6 13- 6 1- 3 6- 3 31-18 2- 3 29- 3 23- 3 12- 6 MIN. QFF PRESSURE IN HPA 1009.0 1003.2 1001.1 996.0 996.0 985.4 986.6 988.0 995.8 1000.3 1005.8 1007.9 985.4 DAY-HOUR 23-12 27-12 24-21 19-12 20-12 26-12 23-12 2- 9 9-12 6-12 26-21 4-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.6 857.3 857.3 856.2 856.2 852.5 850.4 852.5 856.0 859.2 861.6 860.8 856.6 MAX. QFE PRESSURE IN HPA 864.3 862.1 863.1 860.0 859.4 856.0 853.9 854.6 858.5 862.8 864.2 863.6 864.3 DAY 11 23 13 13 29 3 6 16 21 30 24 12 MIN. QFE PRESSURE IN HPA 856.0 852.9 851.6 853.0 853.1 846.8 847.8 849.5 852.4 856.0 857.1 858.0 846.8 DAY 24 12 25 19 5 28 26 2 10 16 27 5 MEAN QNH PRESSURE IN HPA 1016.4 1013.8 1013.8 1012.5 1012.5 1008.3 1005.9 1008.2 1012.3 1015.9 1018.7 1017.8 1013.0 MAX. QNH PRESSURE IN HPA 1021.8 1019.3 1020.4 1016.8 1016.2 1012.3 1009.9 1010.7 1015.1 1020.1 1021.7 1021.0 1021.8 DAY 11 23 13 13 29 3 6 16 21 30 24 12 MIN. QNH PRESSURE IN HPA 1012.3 1008.7 1007.2 1008.8 1008.9 1001.7 1002.9 1004.8 1008.1 1012.3 1013.5 1014.6 1001.7 DAY 24 12 25 19 5 28 26 2 10 16 27 5 MEAN QFF PRESSURE IN HPA 1014.7 1010.8 1009.1 1004.3 1001.6 994.4 991.7 995.1 1002.0 1007.8 1013.0 1013.9 1004.9 MAX. QFF PRESSURE IN HPA 1024.9 1018.6 1019.4 1010.2 1005.9 1000.2 994.8 999.4 1004.4 1013.5 1018.0 1019.9 1024.9 DAY 11 17 13 13 29 3 7 16 28 30 24 12 MIN. QFF PRESSURE IN HPA 1009.6 1004.9 1001.9 998.4 997.5 987.9 988.5 989.5 997.9 1000.5 1005.9 1008.0 987.9 DAY 24 12 25 18 20 27 24 2 9 6 27 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.2 858.0 858.1 857.0 857.0 853.3 851.1 853.2 856.8 860.0 862.5 861.5 857.4 MAX. QFE PRESSURE IN HPA 864.7 863.0 864.6 861.1 860.4 856.9 855.7 855.1 859.5 864.0 865.4 864.4 865.4 DAY 10 23 13 13 29 2 6 31 21 29 4 12 MIN. QFE PRESSURE IN HPA 856.8 853.3 852.2 853.0 854.1 848.0 848.3 850.1 853.0 856.8 858.4 858.6 848.0 DAY 28 12 25 19 5 28 26 2 9 16 27 10 MEAN QNH PRESSURE IN HPA 1017.1 1014.6 1014.6 1013.5 1013.4 1009.2 1006.7 1009.0 1013.2 1016.9 1019.7 1018.5 1013.9 MAX. QNH PRESSURE IN HPA 1022.2 1020.3 1022.1 1018.1 1017.3 1013.3 1011.9 1011.2 1016.3 1021.4 1023.0 1021.9 1023.0 DAY 10 23 13 13 29 2 6 31 21 29 4 12 MIN. QNH PRESSURE IN HPA 1013.2 1009.2 1007.9 1008.8 1010.1 1003.1 1003.4 1005.5 1008.8 1013.2 1015.0 1015.2 1003.1 DAY 28 12 25 19 5 28 26 2 9 16 27 10 MEAN QFF PRESSURE IN HPA 1016.4 1012.8 1011.1 1005.9 1002.8 995.4 992.9 996.7 1004.1 1010.0 1015.6 1015.6 1006.6 MAX. QFF PRESSURE IN HPA 1025.6 1020.4 1022.7 1011.9 1007.8 1001.1 997.1 1000.3 1006.7 1015.4 1019.5 1021.6 1025.6 DAY 11 13 13 13 14 1 6 16 2 29 23 12 MIN. QFF PRESSURE IN HPA 1009.8 1006.7 1003.2 998.9 998.2 988.9 989.9 991.2 1000.5 1004.3 1009.7 1010.4 988.9 DAY 23 12 25 19 21 28 26 2 10 15 27 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.3 859.1 859.0 857.8 857.4 853.7 851.4 853.6 857.3 860.8 863.4 862.5 858.1 MAX. QFE PRESSURE IN HPA 866.2 863.6 865.5 862.3 861.1 857.3 856.0 856.0 860.5 864.6 866.3 865.4 866.3 DAY 10 23 13 13 13 2 6 31 21 29 4 12 MIN. QFE PRESSURE IN HPA 857.1 856.1 853.0 853.2 854.7 847.6 848.6 849.6 852.8 857.8 859.0 859.7 847.6 DAY 28 8 25 19 21 27 26 2 9 15 26 4 MEAN QNH PRESSURE IN HPA 1018.3 1015.8 1015.7 1014.3 1013.9 1009.6 1007.0 1009.5 1013.7 1017.8 1020.7 1019.7 1014.7 MAX. QNH PRESSURE IN HPA 1024.0 1021.0 1023.1 1019.5 1018.1 1013.8 1012.3 1012.3 1017.4 1022.1 1024.1 1023.0 1024.1 DAY 10 23 13 13 13 2 6 31 21 29 4 12 MIN. QNH PRESSURE IN HPA 1013.5 1012.4 1008.8 1009.1 1010.8 1002.6 1003.8 1004.9 1008.6 1014.3 1015.7 1016.5 1002.6 DAY 28 8 25 19 21 27 26 2 9 15 26 4 MEAN QFF PRESSURE IN HPA 1017.0 1013.1 1011.1 1005.6 1002.6 994.8 992.4 996.1 1002.6 1009.3 1015.0 1016.0 1006.3 MAX. QFF PRESSURE IN HPA 1026.6 1020.8 1023.2 1012.0 1008.4 1000.0 997.0 1000.0 1006.0 1014.4 1019.0 1022.5 1026.6 DAY 10 13 13 12 13 1 6 31 2 30 24 12 MIN. QFF PRESSURE IN HPA 1010.4 1007.9 1004.0 998.6 996.7 986.8 989.1 989.2 998.1 1004.4 1009.1 1010.7 986.8 DAY 23 27 25 19 21 27 26 2 9 15 16 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.6 857.9 857.9 856.6 856.3 852.8 850.4 852.4 855.9 859.0 861.4 860.8 856.8 MAX. QFE PRESSURE IN HPA 864.6 862.6 864.3 860.4 860.3 856.4 854.6 855.0 859.1 862.9 864.1 863.8 864.6 DAY 10 23 13 12 13 2 6 31 21 29 4 12 MIN. QFE PRESSURE IN HPA 856.0 854.4 852.2 851.5 854.0 847.2 847.7 848.9 851.8 856.2 857.2 858.0 847.2 DAY 28 18 25 19 4 27 25 2 9 16 26 4 MEAN QNH PRESSURE IN HPA 1016.4 1014.4 1014.4 1013.0 1012.6 1008.6 1005.8 1008.2 1012.2 1015.7 1018.5 1017.8 1013.1 MAX. QNH PRESSURE IN HPA 1022.1 1019.8 1021.8 1017.3 1017.2 1012.7 1010.7 1011.1 1015.8 1020.2 1021.5 1021.2 1022.1 DAY 10 23 13 12 13 2 6 31 21 29 4 12 MIN. QNH PRESSURE IN HPA 1012.3 1010.4 1007.9 1007.1 1010.0 1002.2 1002.8 1004.1 1007.5 1012.5 1013.6 1014.6 1002.2 DAY 28 18 25 19 4 27 25 2 9 16 26 4 MEAN QFF PRESSURE IN HPA 1014.5 1011.1 1009.3 1004.4 1001.1 993.9 991.2 994.6 1001.2 1007.1 1012.4 1013.7 1004.6 MAX. QFF PRESSURE IN HPA 1023.5 1019.1 1021.3 1009.9 1007.6 999.5 995.5 998.2 1004.1 1012.8 1016.9 1019.5 1023.5 DAY 10 13 13 12 13 2 5 31 16 29 24 12 MIN. QFF PRESSURE IN HPA 1009.5 1005.3 1003.0 996.8 996.8 987.5 987.6 988.0 996.9 1002.1 1007.7 1009.0 987.5 DAY 23 27 24 19 21 27 25 2 9 6 26 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 859.0 856.7 856.7 855.3 855.0 851.4 848.9 851.1 854.8 858.1 860.6 860.0 855.6 MAX. QFE PRESSURE IN HPA 863.5 861.4 862.2 858.9 857.9 855.3 852.7 854.1 857.9 861.8 863.6 862.9 863.6 DAY 10 23 13 12 6 2 5 31 21 29 29 12 MIN. QFE PRESSURE IN HPA 855.6 853.3 851.6 850.2 852.6 846.2 846.4 848.0 850.5 854.8 856.2 857.3 846.2 DAY 28 18 25 19 4 27 23 18 9 5 26 19 MEAN QNH PRESSURE IN HPA 1015.7 1013.1 1013.1 1011.5 1011.1 1007.0 1004.2 1006.6 1010.9 1014.6 1017.5 1016.8 1011.8 MAX. QNH PRESSURE IN HPA 1020.9 1018.5 1019.4 1015.6 1014.4 1011.5 1008.5 1010.1 1014.4 1018.9 1021.0 1020.2 1021.0 DAY 10 23 13 12 6 2 5 31 21 29 29 12 MIN. QNH PRESSURE IN HPA 1011.8 1009.2 1007.2 1005.6 1008.4 1001.0 1001.3 1003.1 1006.0 1010.9 1012.5 1013.8 1001.0 DAY 28 18 25 19 4 27 23 18 9 5 26 19 MEAN QFF PRESSURE IN HPA 1014.1 1010.2 1008.4 1003.2 1000.1 993.0 990.0 993.6 1000.6 1006.6 1011.8 1013.1 1003.7 MAX. QFF PRESSURE IN HPA 1023.5 1017.0 1019.0 1008.1 1005.2 998.6 994.3 998.0 1003.4 1012.1 1016.1 1018.8 1023.5 DAY 10 13 13 13 6 2 5 31 21 29 24 12 MIN. QFF PRESSURE IN HPA 1009.0 1003.2 1001.5 996.0 996.0 985.4 986.6 988.6 995.8 1000.3 1006.8 1009.1 985.4 DAY 23 27 24 19 20 26 23 2 9 6 16 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.9 857.3 857.3 855.7 855.5 851.5 849.1 851.6 855.6 858.9 861.6 860.8 856.2 MAX. QFE PRESSURE IN HPA 865.1 862.0 863.2 859.2 859.0 855.3 852.7 854.8 858.5 862.5 864.3 863.8 865.1 DAY 10 23 13 12 13 2 5 31 21 29 29 12 MIN. QFE PRESSURE IN HPA 856.0 853.3 851.5 850.6 853.1 846.4 846.4 848.7 851.5 855.9 857.1 857.8 846.4 DAY 23 18 24 19 4 27 19 18 9 5 26 4 MEAN QNH PRESSURE IN HPA 1016.7 1013.8 1013.7 1011.9 1011.7 1007.1 1004.4 1007.2 1011.8 1015.6 1018.6 1017.7 1012.5 MAX. QNH PRESSURE IN HPA 1022.7 1019.1 1020.5 1015.9 1015.7 1011.5 1008.5 1010.9 1015.1 1019.7 1021.8 1021.2 1022.7 DAY 10 23 13 12 13 2 5 31 21 29 29 12 MIN. QNH PRESSURE IN HPA 1012.3 1009.2 1007.1 1006.1 1008.9 1001.3 1001.3 1003.9 1007.1 1012.1 1013.5 1014.3 1001.3 DAY 23 18 24 19 4 27 19 18 9 5 26 4 MEAN QFF PRESSURE IN HPA 1016.0 1012.1 1010.1 1004.2 1001.0 993.2 990.5 994.9 1002.6 1008.8 1014.5 1014.8 1005.2 MAX. QFF PRESSURE IN HPA 1026.6 1019.3 1021.1 1009.6 1006.8 999.0 994.5 999.6 1005.0 1013.6 1018.8 1020.9 1026.6 DAY 10 13 13 12 13 2 5 31 21 29 24 12 MIN. QFF PRESSURE IN HPA 1009.2 1005.9 1001.6 997.4 996.7 987.2 987.4 989.5 998.2 1002.7 1008.9 1010.1 987.2 DAY 23 27 24 19 20 21 23 2 4 5 26 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 860.2 858.1 857.9 856.7 856.6 852.5 850.6 852.9 856.5 859.8 862.2 861.3 857.1 MAX. QFE PRESSURE IN HPA 865.8 862.6 863.7 860.3 860.4 856.6 854.5 856.2 858.9 863.5 864.5 864.1 865.8 DAY 10 23 12 12 13 2 5 31 21 29 4 11 MIN. QFE PRESSURE IN HPA 856.6 854.6 851.2 853.0 853.8 847.0 848.0 849.7 852.8 856.7 857.1 857.9 847.0 DAY 23 11 24 19 4 27 24 1 8 15 26 4 MEAN QNH PRESSURE IN HPA 1017.1 1014.7 1014.4 1013.1 1012.9 1008.3 1006.0 1008.7 1012.8 1016.6 1019.3 1018.4 1013.5 MAX. QNH PRESSURE IN HPA 1023.5 1019.8 1021.1 1017.2 1017.3 1013.0 1010.5 1012.5 1015.6 1020.9 1022.0 1021.5 1023.5 DAY 10 23 12 12 13 2 5 31 21 29 4 11 MIN. QNH PRESSURE IN HPA 1013.0 1010.7 1006.8 1008.8 1009.7 1002.0 1003.1 1005.0 1008.6 1013.1 1013.5 1014.4 1002.0 DAY 23 11 24 19 4 27 24 1 8 15 26 4 MEAN QFF PRESSURE IN HPA 1015.8 1012.1 1009.7 1004.3 1001.6 993.4 991.5 995.4 1001.8 1008.2 1013.7 1014.6 1005.2 MAX. QFF PRESSURE IN HPA 1026.7 1019.3 1021.1 1010.3 1008.3 999.4 996.0 1000.9 1004.3 1013.3 1018.1 1021.0 1026.7 DAY 10 13 12 12 13 2 5 31 2 29 24 11 MIN. QFF PRESSURE IN HPA 1009.8 1006.2 1001.3 999.0 997.1 986.1 988.4 989.7 998.0 1002.6 1006.4 1007.9 986.1 DAY 23 27 24 23 20 27 24 1 8 5 26 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 860.0 857.8 857.7 856.5 856.1 852.3 850.4 852.7 856.2 859.4 861.9 860.9 856.8 MAX. QFE PRESSURE IN HPA 864.8 862.6 863.3 860.1 859.8 856.0 854.9 856.1 858.6 863.0 864.3 863.8 864.8 DAY 10 22 12 12 28 1 5 31 20 29 4 11 MIN. QFE PRESSURE IN HPA 856.2 853.7 851.4 853.8 853.1 846.8 846.9 849.4 852.7 856.4 857.1 858.0 846.8 DAY 23 11 24 18 4 27 18 1 9 5 26 4 MEAN QNH PRESSURE IN HPA 1016.8 1014.3 1014.2 1012.8 1012.4 1008.0 1005.8 1008.5 1012.5 1016.2 1019.0 1017.9 1013.2 MAX. QNH PRESSURE IN HPA 1022.3 1019.8 1020.6 1017.0 1016.6 1012.3 1011.0 1012.4 1015.2 1020.3 1021.8 1021.2 1022.3 DAY 10 22 12 12 28 1 5 31 20 29 4 11 MIN. QNH PRESSURE IN HPA 1012.5 1009.6 1007.0 1009.7 1008.9 1001.7 1001.8 1004.7 1008.5 1012.7 1013.5 1014.6 1001.7 DAY 23 11 24 18 4 27 18 1 9 5 26 4 MEAN QFF PRESSURE IN HPA 1014.9 1011.0 1008.9 1004.1 1000.9 993.3 991.2 995.0 1001.6 1007.6 1013.1 1013.8 1004.6 MAX. QFF PRESSURE IN HPA 1024.5 1018.1 1019.8 1010.3 1006.6 999.3 995.2 1000.7 1004.4 1012.5 1017.4 1020.0 1024.5 DAY 10 13 12 20 13 2 5 31 15 28 24 11 MIN. QFF PRESSURE IN HPA 1009.6 1004.0 1001.1 997.9 996.3 986.7 988.1 989.2 997.8 1000.9 1005.8 1009.4 986.7 DAY 23 27 24 23 19 27 18 2 8 5 26 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.2 12.7 14.0 20.3 26.6 30.2 30.1 28.3 25.4 18.3 14.8 10.6 20.0 MINIMUN AIR TEMPERATURE (C) 3.1 6.5 7.0 12.3 17.4 20.8 20.7 19.0 15.6 9.4 5.8 1.6 11.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 4 15 13 6 1 0 0 0 39 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 12 1 1 0 0 0 0 0 0 0 2 11 27 TEMPERATURE RECORDS LOWEST(C) -2.0 -1.0 -1.0 5.0 12.0 15.6 16.4 14.8 11.6 5.4 -1.0 -1.8 -2.0 DAY 25 19 25 1 11 1 12 22 26 26 19 14 MAXIMUM AIR TEMPERATURE (C) 13.2 18.8 20.5 27.0 34.1 37.3 37.3 36.1 33.6 26.6 23.5 19.8 27.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 8 31 30 31 31 30 5 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) 20.6 24.2 27.0 32.4 39.0 41.6 41.0 38.0 37.0 33.4 28.6 24.0 41.6 DAY 30 22 20 23 28 22 8 14 1 2 4 22 DIF. BETWEEN (MAX.-MIN.) (C) 10.1 12.3 13.5 14.7 16.7 16.5 16.6 17.1 18.0 17.2 17.7 18.2 15.7 MEAN DAILY TEMP. (MDT) (C) 8.1 12.6 13.7 19.7 25.8 29.1 29.0 27.6 24.6 18.0 14.7 10.7 19.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 21.2 147.6 242.1 247.3 203.7 108.0 10.6 0.0 0.0 980.8 HEATING DEG. DAYS(BASE 18 0C) 305.7 152.7 134.9 21.4 0.0 0.0 0.0 0.0 0.0 34.9 104.7 226.7 981.0 DEWPOINT (MEAN C) 0.9 -0.2 -1.6 1.1 2.1 3.9 1.2 0.3 -1.0 -6.9 -4.6 -7.3 -1.0 MIXING RATIO (G/KG) 5.04 4.60 4.24 5.09 5.54 6.46 5.37 4.83 4.44 2.83 3.48 2.71 4.55 VAPOUR PRESSURE (HPA) 6.90 6.30 5.81 6.96 7.55 8.75 7.27 6.57 6.06 3.90 4.79 3.74 6.22 SATURATION DEF. (HPA) 4.47 9.11 11.06 18.13 29.09 35.77 36.90 33.61 28.18 18.60 13.50 10.14 20.71 RELATIVE HUMIDITY (MEAN %) 65 44 38 33 23 21 18 18 20 20 29 31 30 RELATIVE HUMIDITY (MAX. %) 87 69 64 54 36 34 28 28 33 31 45 48 46 RELATIVE HUMIDITY (MIN. %) 44 27 19 17 12 12 10 9 10 11 17 16 17 RELATIVE HUMIDITY (MEAN% 03UTC) 82 65 59 47 33 29 25 24 28 27 41 46 42 RELATIVE HUMIDITY (MEAN% 09UTC) 49 29 23 19 14 14 11 11 11 12 19 19 19 RELATIVE HUMIDITY (MEAN% 15UTC) 55 35 30 27 17 17 13 14 15 16 23 23 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 71.3 0.5 8.1 14.8 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 95.1 DAYS WITH PRECIPITATION >=10 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 3 0 1 1 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 1 6 0 1 5 0 0 0 0 0 0 0 0 12 DAYS WITH PRECIPITATION 9 2 4 5 1 2 0 0 0 0 0 0 23 GREATEST DAILY PRECIPITATION 32.0 0.5 7.0 8.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 32.0 DAY 14 23 27 6 ** 6 ** ** ** ** ** ** DAY WITH THUNDER STORM 0 0 1 2 0 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 7 8 2 3 9 10 8 2 0 3 1 55 WIND DIRECTION (PREVAILING) 270 180 270 180 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.9 10.6 9.9 9.7 8.6 10.4 12.0 8.2 7.2 5.3 7.3 6.0 8.5 PREVAILING WIND PERCENT 15.7 15.2 18.1 12.5 18.1 12.9 22.2 19.8 24.2 14.5 13.8 18.5 16.9 CALMS PERCENT OF WIND 55.2 36.2 45.2 55.0 48.0 51.3 55.6 45.6 52.5 61.3 58.3 57.7 51.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 219 200 230 217 257 292 302 331 290 315 231 258 258 VECTOR WIND MAGNITUDE(KNOTS) 2.4 3.2 3.0 2.6 2.3 1.5 3.2 3.0 2.1 1.2 1.8 1.4 1.7 WIND STEADINESES (MEAN %) 55.8 54.2 55.6 61.9 52.3 31.3 66.7 63.8 65.6 52.2 56.2 53.8 40.5 WIND SPEED (MEAN KNOTS) 4.3 5.9 5.4 4.2 4.4 4.8 4.8 4.7 3.2 2.3 3.2 2.6 4.2 FASTEST WIND DIRECTION 190 200 200 270 260 210 290 290 270 240 190 280 200 FASTEST WIND SPEED (KNOTS) 27 31 25 23 27 23 25 23 17 14 23 19 31 DAY 17 22 4 12 30 4 23 20 2 7 29 6 DAYS WITH SKY CLEAR (0-2)/8 13 11 15 14 25 27 28 30 30 30 28 22 273 DAYS WITH P.CLOUDY (3-6)/8 7 8 15 12 6 3 2 1 0 1 1 9 65 DAYS WITH CLOUDY (7-8)/8 11 9 1 4 0 0 1 0 0 0 1 0 27 DAYS WITH VISIBILITY =< 2 KM 3 1 4 1 1 1 0 0 0 0 1 0 12 DURATION OF SUNSHINE HOURS 168.1 184.2 250.9 266.1 343.5 345.0 354.4 360.4 322.3 309.9 266.3 265.3 3436.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.9 860.1 858.5 857.8 856.1 852.7 850.8 853.3 855.6 861.7 861.4 862.2 857.5 MAX. QFE PRESSURE IN HPA 866.0 864.9 863.3 863.2 859.8 856.4 855.2 857.0 860.3 866.5 867.3 867.0 867.3 DAY-HOUR 26- 6 2- 6 18- 6 1- 6 11- 3 8- 3 28- 3 7- 3 30- 6 17- 6 24- 6 26- 6 MIN. QFE PRESSURE IN HPA 849.0 853.4 850.9 852.8 849.0 849.2 847.0 849.4 851.7 856.2 857.1 857.2 847.0 DAY-HOUR 14-12 23-21 22-12 14- 0 29-12 13-12 10-12 12-15 3-12 3-12 7-12 3-12 MEAN QNH PRESSURE IN HPA 1016.7 1016.9 1015.2 1014.3 1012.3 1008.5 1006.4 1009.2 1011.8 1018.8 1018.5 1019.4 1014.0 MAX. QNH PRESSURE IN HPA 1023.7 1022.5 1020.6 1020.5 1016.6 1012.7 1011.4 1013.4 1017.2 1024.3 1025.2 1024.9 1025.2 DAY-HOUR 26- 6 2- 6 18- 6 1- 6 11- 3 8- 3 28- 3 7- 3 30- 6 17- 6 24- 6 26- 6 MIN. QNH PRESSURE IN HPA 1004.2 1009.3 1006.4 1008.6 1004.2 1004.5 1002.0 1004.7 1007.3 1012.5 1013.5 1013.6 1002.0 DAY-HOUR 14-12 23-21 22-12 14- 0 29-12 13-12 10-12 12-15 3-12 3-12 7-12 3-12 MEAN QFF PRESSURE IN HPA 1015.0 1012.6 1010.1 1005.8 1000.3 994.5 992.5 996.3 1000.5 1011.6 1013.1 1016.6 1005.7 MAX. QFF PRESSURE IN HPA 1022.7 1019.3 1017.7 1015.4 1008.9 1001.1 999.4 1001.9 1006.0 1018.7 1022.5 1023.5 1023.5 DAY-HOUR 26-15 19- 3 18- 3 1- 3 11- 3 1- 3 28- 3 26- 3 30- 6 17- 3 24- 3 19- 3 MIN. QFF PRESSURE IN HPA 1001.3 1001.4 998.3 998.9 989.0 988.8 986.4 991.6 994.6 1001.8 1006.7 1007.9 986.4 DAY-HOUR 14-12 23-21 22-12 27-21 29-21 13-12 8-12 12-15 2-12 3- 9 5- 9 5- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.5 859.6 858.0 857.5 856.0 852.7 850.9 853.3 855.4 861.4 861.2 862.0 857.3 MAX. QFE PRESSURE IN HPA 864.4 863.2 862.0 861.8 859.0 855.2 854.2 855.8 857.8 865.4 864.8 865.5 865.5 DAY 27 8 18 1 11 8 28 7 30 17 25 26 MIN. QFE PRESSURE IN HPA 851.7 853.5 851.7 852.8 849.7 850.1 848.5 850.4 852.4 857.1 858.2 857.8 848.5 DAY 15 24 13 14 30 26 9 13 5 3 17 5 MEAN QNH PRESSURE IN HPA 1016.3 1016.4 1014.5 1014.0 1012.2 1008.4 1006.4 1009.2 1011.6 1018.4 1018.2 1019.2 1013.7 MAX. QNH PRESSURE IN HPA 1021.9 1020.5 1019.1 1018.9 1015.7 1011.4 1010.2 1012.0 1014.3 1023.0 1022.3 1023.1 1023.1 DAY 27 8 18 1 11 8 28 7 30 17 25 26 MIN. QNH PRESSURE IN HPA 1007.3 1009.4 1007.3 1008.6 1005.0 1005.5 1003.7 1005.8 1008.1 1013.5 1014.8 1014.3 1003.7 DAY 15 24 13 14 30 26 9 13 5 3 17 5 MEAN QFF PRESSURE IN HPA 1014.4 1011.9 1009.4 1005.8 1000.6 994.8 992.7 996.5 1000.4 1011.2 1012.7 1015.9 1005.5 MAX. QFF PRESSURE IN HPA 1020.5 1016.8 1015.2 1013.8 1007.3 999.8 997.0 1000.5 1004.0 1017.1 1018.6 1020.1 1020.5 DAY 27 19 18 1 11 1 27 27 24 17 24 26 MIN. QFF PRESSURE IN HPA 1006.6 1002.4 999.1 1000.1 990.9 990.3 987.7 992.8 995.7 1002.9 1007.9 1007.9 987.7 DAY 15 24 22 12 30 14 9 10 2 3 5 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.0 860.4 859.1 858.4 856.8 853.6 851.7 854.0 856.3 862.3 862.0 862.7 858.1 MAX. QFE PRESSURE IN HPA 864.4 864.2 863.0 862.4 859.8 856.4 855.2 857.0 858.8 865.9 866.2 866.2 866.2 DAY 27 2 18 1 11 8 28 7 30 17 24 26 MIN. QFE PRESSURE IN HPA 852.2 854.7 852.7 853.8 851.0 851.4 848.8 851.9 853.6 857.8 859.0 858.8 848.8 DAY 15 24 22 13 30 26 12 23 5 3 17 4 MEAN QNH PRESSURE IN HPA 1016.9 1017.3 1015.8 1015.0 1013.2 1009.5 1007.3 1010.0 1012.6 1019.5 1019.2 1019.9 1014.7 MAX. QNH PRESSURE IN HPA 1021.9 1021.7 1020.3 1019.6 1016.6 1012.7 1011.4 1013.4 1015.5 1023.6 1024.0 1024.0 1024.0 DAY 27 2 18 1 11 8 28 7 30 17 24 26 MIN. QNH PRESSURE IN HPA 1007.9 1010.8 1008.5 1009.7 1006.5 1007.0 1004.0 1007.6 1009.5 1014.3 1015.7 1015.5 1004.0 DAY 15 24 22 13 30 26 12 23 5 3 17 4 MEAN QFF PRESSURE IN HPA 1015.9 1013.9 1011.8 1007.2 1001.7 996.0 994.1 997.9 1002.3 1013.4 1015.1 1018.6 1007.3 MAX. QFF PRESSURE IN HPA 1022.3 1019.3 1017.7 1015.4 1008.9 1001.1 999.4 1001.9 1005.8 1018.7 1022.5 1023.5 1023.5 DAY 27 19 18 1 11 1 28 26 24 17 24 19 MIN. QFF PRESSURE IN HPA 1007.9 1005.8 999.4 1000.5 993.2 992.8 989.9 994.6 997.7 1004.7 1009.4 1009.7 989.9 DAY 15 24 22 12 30 14 8 13 1 3 5 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.3 861.5 859.9 859.0 857.2 853.7 851.8 854.3 856.7 863.1 862.8 863.5 858.7 MAX. QFE PRESSURE IN HPA 866.0 864.9 863.3 863.2 859.7 856.1 854.7 857.0 860.3 866.5 867.3 867.0 867.3 DAY 26 2 18 1 11 8 27 18 30 17 24 26 MIN. QFE PRESSURE IN HPA 855.1 856.2 853.2 854.7 851.4 851.6 849.4 852.0 853.6 858.1 859.4 859.7 849.4 DAY 15 23 22 13 30 12 8 12 5 3 14 3 MEAN QNH PRESSURE IN HPA 1018.3 1018.5 1016.8 1015.7 1013.6 1009.6 1007.5 1010.3 1013.1 1020.4 1020.0 1020.9 1015.4 MAX. QNH PRESSURE IN HPA 1023.7 1022.5 1020.6 1020.5 1016.5 1012.4 1010.8 1013.4 1017.2 1024.3 1025.2 1024.9 1025.2 DAY 26 2 18 1 11 8 27 18 30 17 24 26 MIN. QNH PRESSURE IN HPA 1011.2 1012.5 1009.1 1010.8 1007.0 1007.2 1004.7 1007.7 1009.5 1014.7 1016.2 1016.5 1004.7 DAY 15 23 22 13 30 12 8 12 5 3 14 3 MEAN QFF PRESSURE IN HPA 1016.6 1014.1 1011.5 1006.6 1001.0 995.3 993.2 997.1 1001.0 1012.7 1014.1 1017.9 1006.8 MAX. QFF PRESSURE IN HPA 1021.7 1019.0 1016.3 1014.5 1007.3 1000.3 997.3 1001.0 1006.0 1018.3 1021.7 1021.9 1021.9 DAY 26 8 18 1 10 1 24 26 30 17 24 26 MIN. QFF PRESSURE IN HPA 1009.3 1005.6 1000.0 1001.9 992.4 990.8 989.2 994.3 996.1 1002.9 1007.9 1010.9 989.2 DAY 14 23 22 27 29 14 8 12 1 3 14 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.7 860.1 858.7 857.9 856.2 852.9 850.9 853.3 855.6 861.5 861.3 862.0 857.5 MAX. QFE PRESSURE IN HPA 863.9 863.3 862.2 861.6 858.9 855.7 853.8 856.7 859.2 864.9 865.5 865.4 865.5 DAY 6 8 7 1 10 8 27 18 30 16 24 26 MIN. QFE PRESSURE IN HPA 852.0 855.6 852.3 853.7 850.4 850.6 848.5 851.1 852.5 857.0 858.2 858.0 848.5 DAY 14 16 22 13 30 25 10 10 5 3 7 3 MEAN QNH PRESSURE IN HPA 1016.5 1017.0 1015.4 1014.5 1012.5 1008.7 1006.4 1009.2 1011.8 1018.6 1018.3 1019.1 1014.0 MAX. QNH PRESSURE IN HPA 1021.3 1020.6 1019.4 1018.7 1015.6 1011.9 1009.7 1013.1 1015.9 1022.5 1023.1 1023.0 1023.1 DAY 6 8 7 1 10 8 27 18 30 16 24 26 MIN. QNH PRESSURE IN HPA 1007.7 1011.8 1008.0 1009.6 1005.8 1006.1 1003.7 1006.7 1008.3 1013.4 1014.8 1014.6 1003.7 DAY 14 16 22 13 30 25 10 10 5 3 7 3 MEAN QFF PRESSURE IN HPA 1014.3 1012.1 1009.8 1005.6 1000.2 994.3 992.1 995.8 999.9 1010.7 1012.2 1015.5 1005.2 MAX. QFF PRESSURE IN HPA 1019.2 1016.5 1014.3 1012.5 1006.2 999.3 996.2 999.4 1005.3 1015.3 1018.8 1019.9 1019.9 DAY 6 8 18 7 10 1 27 18 30 9 24 26 MIN. QFF PRESSURE IN HPA 1005.1 1004.6 999.3 1000.1 991.8 990.0 988.3 993.0 994.6 1001.8 1006.7 1009.7 988.3 DAY 14 16 22 27 30 13 8 10 3 3 5 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.7 859.0 857.5 856.9 855.1 851.7 849.8 852.2 854.6 860.4 860.4 861.1 856.4 MAX. QFE PRESSURE IN HPA 863.0 862.3 860.7 860.4 857.6 854.4 852.9 855.5 858.3 863.9 864.4 864.4 864.4 DAY 26 8 7 1 10 8 27 18 30 16 24 26 MIN. QFE PRESSURE IN HPA 849.0 854.0 850.9 853.5 849.0 849.2 847.0 849.5 851.7 856.2 857.1 857.2 847.0 DAY 14 23 22 13 29 13 10 12 3 3 7 3 MEAN QNH PRESSURE IN HPA 1015.4 1015.7 1013.9 1013.3 1011.2 1007.3 1005.1 1007.9 1010.6 1017.4 1017.3 1018.1 1012.8 MAX. QNH PRESSURE IN HPA 1020.3 1019.5 1017.6 1017.3 1014.1 1010.4 1008.7 1011.7 1014.9 1021.3 1021.9 1021.9 1021.9 DAY 26 8 7 1 10 8 27 18 30 16 24 26 MIN. QNH PRESSURE IN HPA 1004.2 1010.0 1006.4 1009.4 1004.2 1004.5 1002.0 1004.8 1007.3 1012.5 1013.5 1013.6 1002.0 DAY 14 23 22 13 29 13 10 12 3 3 7 3 MEAN QFF PRESSURE IN HPA 1013.5 1011.3 1008.9 1005.1 999.5 993.7 991.5 995.1 999.5 1010.1 1011.8 1014.8 1004.6 MAX. QFF PRESSURE IN HPA 1018.9 1015.3 1013.6 1011.8 1005.1 997.9 996.2 998.8 1004.4 1015.2 1018.1 1019.5 1019.5 DAY 26 18 17 1 10 1 27 27 30 17 24 26 MIN. QFF PRESSURE IN HPA 1001.3 1003.8 998.3 1000.8 990.3 988.8 986.4 991.9 994.6 1001.8 1007.0 1009.5 986.4 DAY 14 16 22 29 29 13 8 12 2 3 7 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.7 859.7 858.0 857.3 855.3 851.8 849.9 852.5 854.9 861.3 861.1 861.9 856.9 MAX. QFE PRESSURE IN HPA 864.2 863.0 861.9 860.5 858.3 854.4 853.2 856.1 858.8 865.0 865.1 865.3 865.3 DAY 26 1 17 1 10 8 27 18 30 16 24 26 MIN. QFE PRESSURE IN HPA 849.5 854.2 850.9 853.7 849.7 849.3 847.1 849.4 851.9 856.3 858.2 857.8 847.1 DAY 14 23 22 13 29 13 14 12 3 3 14 3 MEAN QNH PRESSURE IN HPA 1016.5 1016.5 1014.6 1013.7 1011.5 1007.5 1005.3 1008.2 1011.0 1018.3 1018.1 1019.0 1013.3 MAX. QNH PRESSURE IN HPA 1021.7 1020.3 1019.0 1017.4 1014.9 1010.4 1009.1 1012.4 1015.5 1022.6 1022.7 1022.9 1022.9 DAY 26 1 17 1 10 8 27 18 30 16 24 26 MIN. QNH PRESSURE IN HPA 1004.8 1010.2 1006.4 1009.6 1005.0 1004.6 1002.1 1004.7 1007.6 1012.6 1014.8 1014.3 1002.1 DAY 14 23 22 13 29 13 14 12 3 3 14 3 MEAN QFF PRESSURE IN HPA 1015.5 1013.1 1010.6 1005.8 1000.0 994.0 992.1 996.1 1000.8 1012.3 1014.0 1017.6 1006.0 MAX. QFF PRESSURE IN HPA 1022.7 1018.3 1016.9 1012.8 1006.9 997.8 997.1 999.4 1005.9 1017.1 1020.8 1021.8 1022.7 DAY 26 25 17 1 10 1 27 26 30 16 23 18 MIN. QFF PRESSURE IN HPA 1002.4 1005.1 999.0 1001.4 991.3 989.6 987.4 991.6 995.2 1003.2 1009.6 1011.2 987.4 DAY 14 16 22 26 29 13 7 12 1 3 29 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 860.3 860.4 858.7 858.0 856.3 852.7 851.0 853.5 855.8 861.9 861.5 862.4 857.7 MAX. QFE PRESSURE IN HPA 865.1 863.6 862.5 861.2 859.3 855.0 854.4 856.5 859.9 865.6 865.3 865.8 865.8 DAY 26 5 17 1 10 7 27 18 30 16 24 25 MIN. QFE PRESSURE IN HPA 851.2 854.2 852.0 854.3 850.1 850.2 848.3 850.2 852.8 857.2 858.6 858.4 848.3 DAY 14 23 22 13 29 13 7 12 4 3 16 4 MEAN QNH PRESSURE IN HPA 1017.2 1017.3 1015.4 1014.6 1012.6 1008.5 1006.6 1009.4 1012.0 1019.1 1018.6 1019.6 1014.2 MAX. QNH PRESSURE IN HPA 1022.7 1021.0 1019.7 1018.2 1016.0 1011.1 1010.4 1012.8 1016.7 1023.3 1022.9 1023.5 1023.5 DAY 26 5 17 1 10 7 27 18 30 16 24 25 MIN. QNH PRESSURE IN HPA 1006.8 1010.2 1007.7 1010.3 1005.5 1005.6 1003.4 1005.6 1008.6 1013.6 1015.2 1015.0 1003.4 DAY 14 23 22 13 29 13 7 12 4 3 16 4 MEAN QFF PRESSURE IN HPA 1015.5 1012.9 1010.1 1005.4 1000.0 994.2 992.3 996.2 1000.1 1011.4 1012.8 1016.6 1005.6 MAX. QFF PRESSURE IN HPA 1022.0 1018.8 1016.4 1012.4 1007.3 998.3 996.4 999.6 1006.0 1017.1 1019.4 1020.9 1022.0 DAY 26 8 17 1 10 23 27 26 30 16 24 7 MIN. QFF PRESSURE IN HPA 1005.9 1003.0 1000.3 999.8 990.7 989.6 987.7 992.0 995.0 1002.0 1007.3 1009.7 987.7 DAY 14 23 21 27 29 13 7 12 2 3 4 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 860.0 860.0 858.5 857.6 855.9 852.6 851.0 853.4 855.6 861.7 861.4 862.2 857.5 MAX. QFE PRESSURE IN HPA 864.6 863.3 862.3 861.2 859.0 855.1 854.2 856.0 859.6 865.7 864.8 866.0 866.0 DAY 26 7 17 16 10 7 27 18 30 16 24 25 MIN. QFE PRESSURE IN HPA 851.5 853.4 851.5 854.0 849.0 850.4 848.5 850.4 852.5 857.3 858.6 857.9 848.5 DAY 14 23 12 13 29 25 7 12 4 2 14 4 MEAN QNH PRESSURE IN HPA 1016.9 1016.9 1015.1 1014.1 1012.2 1008.4 1006.5 1009.3 1011.8 1018.8 1018.4 1019.3 1014.0 MAX. QNH PRESSURE IN HPA 1022.1 1020.6 1019.5 1018.2 1015.7 1011.2 1010.2 1012.3 1016.4 1023.4 1022.3 1023.7 1023.7 DAY 26 7 17 16 10 7 27 18 30 16 24 25 MIN. QNH PRESSURE IN HPA 1007.1 1009.3 1007.1 1010.0 1004.2 1005.8 1003.7 1005.8 1008.3 1013.8 1015.2 1014.4 1003.7 DAY 14 23 12 13 29 25 7 12 4 2 14 4 MEAN QFF PRESSURE IN HPA 1014.7 1012.0 1009.5 1005.0 999.9 994.0 992.1 995.9 999.9 1011.0 1012.5 1015.7 1005.2 MAX. QFF PRESSURE IN HPA 1020.4 1017.3 1015.2 1011.4 1006.2 997.6 996.4 999.1 1005.2 1016.7 1018.2 1020.0 1020.4 DAY 26 8 17 1 10 1 27 25 30 16 23 25 MIN. QFF PRESSURE IN HPA 1006.6 1001.4 999.8 998.9 989.0 990.1 987.3 992.6 994.7 1002.1 1007.3 1008.0 987.3 DAY 14 23 12 27 29 12 8 12 2 2 4 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.6 11.2 16.7 19.8 26.5 30.8 30.4 29.6 22.7 19.3 16.5 9.4 20.1 MINIMUN AIR TEMPERATURE (C) 1.3 4.2 10.2 11.5 18.3 21.2 23.1 21.2 13.9 11.5 8.2 2.0 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 9 15 27 16 2 0 0 0 69 DAYS WITH MINIMUM TEMP. <=-4 5 0 0 0 0 0 0 0 0 0 0 2 7 DAYS WITH FREEZING MIN.<= 0 7 5 0 0 0 0 0 0 0 0 0 13 25 TEMPERATURE RECORDS LOWEST(C) -8.0 -3.0 2.2 2.4 12.0 16.4 20.4 17.0 8.4 3.5 2.8 -8.0 -8.0 DAY 11 21 3 7 12 13 27 26 20 14 29 9 MAXIMUM AIR TEMPERATURE (C) 15.5 17.5 22.3 26.7 33.3 38.0 37.7 37.3 30.8 26.7 23.6 17.1 27.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 8 28 30 31 31 18 3 0 0 149 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 23.2 26.4 33.6 36.6 42.0 41.0 39.2 37.6 31.2 27.2 23.8 42.0 DAY 4 28 31 28 27 23 21 1 2 1 8 2 DIF. BETWEEN (MAX.-MIN.) (C) 14.2 13.3 12.1 15.2 15.0 16.8 14.6 16.1 16.9 15.2 15.4 15.1 15.0 MEAN DAILY TEMP. (MDT) (C) 8.4 10.9 16.3 19.1 25.8 29.6 30.4 29.3 22.4 19.1 15.9 9.5 19.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 17.9 152.0 257.3 291.4 256.4 67.1 9.2 0.0 0.0 1051.5 HEATING DEG. DAYS(BASE 18 0C) 298.2 200.1 64.9 28.3 0.0 0.0 0.0 0.0 0.8 19.9 62.5 262.6 937.1 DEWPOINT (MEAN C) -3.9 -1.4 3.4 1.0 -0.1 -1.5 6.6 4.3 -4.3 0.9 1.8 -4.0 0.2 MIXING RATIO (G/KG) 3.71 4.30 5.95 5.11 4.79 4.29 8.42 7.02 3.44 5.06 5.19 3.66 5.08 VAPOUR PRESSURE (HPA) 5.09 5.88 8.13 6.98 6.53 5.82 11.29 9.46 4.71 6.94 7.13 5.03 6.91 SATURATION DEF. (HPA) 6.80 8.21 11.62 17.55 29.60 40.55 33.54 33.47 24.57 16.53 12.61 7.97 20.25 RELATIVE HUMIDITY (MEAN %) 47 46 45 33 21 14 29 24 18 32 40 44 33 RELATIVE HUMIDITY (MAX. %) 72 70 69 51 40 24 47 40 28 48 61 67 51 RELATIVE HUMIDITY (MIN. %) 27 28 27 19 10 7 14 11 10 19 24 23 18 RELATIVE HUMIDITY (MEAN% 03UTC) 67 67 64 46 30 19 42 36 26 42 57 61 46 RELATIVE HUMIDITY (MEAN% 09UTC) 33 33 31 21 12 8 16 14 12 20 26 29 21 RELATIVE HUMIDITY (MEAN% 15UTC) 38 37 39 28 14 10 21 18 14 28 32 33 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 66.7 12.7 45.3 9.9 9.0 0.0 7.2 6.3 0.0 1.4 2.0 9.9 170.4 DAYS WITH PRECIPITATION >=10 2 1 1 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 2 1 3 1 1 0 0 1 0 0 0 1 10 DAYS WITH PRECIPITATION >= 1 4 1 4 3 1 0 2 1 0 0 1 2 19 DAYS WITH PRECIPITATION 5 3 9 9 3 0 5 2 1 9 2 4 52 GREATEST DAILY PRECIPITATION 50.5 12.7 26.2 7.0 9.0 0.0 4.0 6.0 0.0 0.6 2.0 5.0 50.5 DAY 25 19 18 14 11 ** 7 7 ** 27 13 26 DAY WITH THUNDER STORM 0 1 3 3 0 0 5 3 0 5 0 0 20 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH DUST 4 4 5 5 6 9 6 7 6 0 1 8 61 WIND DIRECTION (PREVAILING) 270 180 270 270 270 360 270 270 270 270 180 180 270 PREVAILING WIND SPEED(KNOTS) 7.3 11.2 10.1 9.0 7.7 8.8 9.9 12.3 8.3 7.1 9.5 12.8 9.1 PREVAILING WIND PERCENT 14.2 22.3 18.1 10.0 14.1 15.8 11.3 10.5 20.0 10.5 12.1 15.3 13.4 CALMS PERCENT OF WIND 51.8 41.1 50.0 51.7 46.0 48.3 56.9 58.9 57.1 76.2 61.7 56.0 54.7 NO. OF WIND OBSERVATION 247 224 248 240 248 240 248 248 240 248 240 248 2919 VECTOR WIND DIRECTION (MEAN) 228 219 228 269 243 338 317 296 314 297 202 218 249 VECTOR WIND MAGNITUDE(KNOTS) 1.3 4.2 2.6 1.2 1.8 2.3 0.6 1.2 2.1 0.9 2.0 2.7 1.4 WIND STEADINESES (MEAN %) 37.1 65.6 57.8 28.6 40.9 51.1 15.0 32.4 61.8 56.3 69.0 64.3 35.9 WIND SPEED (MEAN KNOTS) 3.5 6.4 4.5 4.2 4.4 4.5 4.0 3.7 3.4 1.6 2.9 4.2 3.9 FASTEST WIND DIRECTION 280 270 150 230 260 290 20 290 290 300 200 200 270 FASTEST WIND SPEED (KNOTS) 25 35 25 23 23 23 25 31 25 19 23 27 35 DAY 14 20 2 3 2 3 7 16 21 2 18 1 DAYS WITH SKY CLEAR (0-2)/8 16 22 10 16 22 28 15 20 26 23 17 19 234 DAYS WITH P.CLOUDY (3-6)/8 9 4 14 13 8 2 13 11 4 8 12 11 109 DAYS WITH CLOUDY (7-8)/8 6 2 7 1 1 0 3 0 0 0 1 1 22 DAYS WITH VISIBILITY =< 2 KM 1 1 0 0 1 1 3 0 0 0 0 1 8 DURATION OF SUNSHINE HOURS 223.6 250.9 235.2 286.7 330.1 351.7 306.8 301.9 315.9 278.4 252.2 250.5 3383.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.0 857.3 859.1 857.5 856.0 850.1 848.3 850.7 857.4 861.2 861.9 861.8 856.8 MAX. QFE PRESSURE IN HPA 866.4 862.4 864.1 864.9 860.9 855.2 852.0 854.1 863.8 865.4 866.3 866.0 866.4 DAY-HOUR 28- 6 28-18 18- 6 5-18 14- 6 1- 3 5- 6 14- 3 23- 6 31- 6 1- 6 30- 6 MIN. QFE PRESSURE IN HPA 853.8 852.7 855.3 851.6 851.6 845.2 843.6 845.4 848.7 855.6 855.0 856.1 843.6 DAY-HOUR 17- 0 12-12 13- 0 3-12 2- 0 30-12 20-12 1-12 1-12 3-12 26-12 4-12 MEAN QNH PRESSURE IN HPA 1016.9 1013.8 1015.8 1014.0 1012.2 1005.5 1003.5 1006.2 1013.8 1018.2 1019.0 1018.9 1013.2 MAX. QNH PRESSURE IN HPA 1024.2 1019.6 1021.5 1022.5 1017.9 1011.4 1007.7 1010.1 1021.2 1023.0 1024.1 1023.7 1024.2 DAY-HOUR 28- 6 28-18 18- 6 5-18 14- 6 1- 3 5- 6 14- 3 23- 6 31- 6 1- 6 30- 6 MIN. QNH PRESSURE IN HPA 1009.7 1008.5 1011.5 1007.2 1007.2 999.9 998.1 1000.1 1003.9 1011.8 1011.1 1012.4 998.1 DAY-HOUR 17- 0 12-12 13- 0 3-12 2- 0 30-12 20-12 1-12 1-12 3-12 26-12 4-12 MEAN QFF PRESSURE IN HPA 1015.1 1010.3 1009.2 1005.7 1000.4 991.4 989.1 992.4 1004.1 1010.3 1012.6 1016.7 1004.8 MAX. QFF PRESSURE IN HPA 1023.0 1018.1 1017.3 1020.1 1006.5 999.7 994.3 996.9 1014.8 1016.7 1018.0 1026.6 1026.6 DAY-HOUR 20- 3 21- 3 4- 6 6- 3 14- 3 1- 3 24- 3 14- 3 24- 3 11- 3 22- 3 9- 3 MIN. QFF PRESSURE IN HPA 1004.9 1002.6 1002.5 996.3 994.7 984.2 982.7 985.2 990.2 1002.6 1003.9 1005.6 982.7 DAY-HOUR 17- 0 12-21 13- 0 3- 0 28-15 29-12 20-12 2-21 1-12 2- 9 26- 9 4- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.8 857.0 858.7 857.2 855.8 850.3 848.5 850.8 857.1 861.0 861.8 861.3 856.6 MAX. QFE PRESSURE IN HPA 864.0 860.5 861.6 863.6 859.1 854.3 850.9 852.9 862.4 862.9 865.1 864.5 865.1 DAY 29 28 27 6 15 1 5 15 24 10 5 20 MIN. QFE PRESSURE IN HPA 853.8 853.2 855.3 852.0 851.6 846.9 846.2 846.5 850.7 857.3 857.5 857.1 846.2 DAY 17 10 13 4 2 30 21 3 1 3 26 4 MEAN QNH PRESSURE IN HPA 1016.6 1013.4 1015.4 1013.6 1012.0 1005.7 1003.7 1006.3 1013.5 1018.0 1018.9 1018.3 1013.0 MAX. QNH PRESSURE IN HPA 1021.4 1017.4 1018.7 1021.0 1015.8 1010.3 1006.4 1008.7 1019.6 1020.2 1022.7 1022.0 1022.7 DAY 29 28 27 6 15 1 5 15 24 10 5 20 MIN. QNH PRESSURE IN HPA 1009.7 1009.1 1011.5 1007.7 1007.2 1001.8 1001.0 1001.4 1006.2 1013.8 1014.0 1013.5 1001.0 DAY 17 10 13 4 2 30 21 3 1 3 26 4 MEAN QFF PRESSURE IN HPA 1014.5 1009.7 1008.7 1005.4 1000.4 992.1 989.3 992.6 1003.7 1010.0 1012.3 1015.8 1004.5 MAX. QFF PRESSURE IN HPA 1021.0 1015.6 1015.5 1017.7 1005.2 997.6 993.5 996.2 1012.2 1013.9 1016.1 1023.2 1023.2 DAY 29 21 19 6 8 1 6 8 24 11 5 9 MIN. QFF PRESSURE IN HPA 1004.9 1002.7 1002.5 996.3 994.7 986.4 984.9 986.2 992.2 1004.9 1006.3 1007.1 984.9 DAY 17 13 13 3 2 30 21 3 1 3 26 3 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.4 857.6 859.4 858.3 857.0 851.3 849.2 851.7 858.0 861.9 862.7 862.2 857.5 MAX. QFE PRESSURE IN HPA 864.7 861.3 862.4 863.9 860.4 855.2 851.8 854.1 863.2 864.5 865.2 865.2 865.2 DAY 28 28 18 6 14 1 5 14 23 31 5 20 MIN. QFE PRESSURE IN HPA 854.3 854.0 856.6 852.8 854.1 847.8 846.6 847.8 851.7 858.2 857.5 858.6 846.6 DAY 17 13 15 4 11 30 21 3 1 3 26 4 MEAN QNH PRESSURE IN HPA 1017.3 1014.1 1016.2 1014.9 1013.4 1006.9 1004.5 1007.3 1014.5 1019.0 1019.9 1019.4 1013.9 MAX. QNH PRESSURE IN HPA 1022.2 1018.3 1019.6 1021.3 1017.3 1011.4 1007.5 1010.1 1020.5 1022.0 1022.8 1022.8 1022.8 DAY 28 28 18 6 14 1 5 14 23 31 5 20 MIN. QNH PRESSURE IN HPA 1010.3 1010.0 1013.0 1008.6 1010.1 1002.9 1001.5 1002.9 1007.3 1014.8 1014.0 1015.2 1001.5 DAY 17 13 15 4 11 30 21 3 1 3 26 4 MEAN QFF PRESSURE IN HPA 1016.6 1011.8 1010.5 1007.5 1002.0 993.4 990.6 994.3 1005.9 1012.2 1014.8 1018.2 1006.5 MAX. QFF PRESSURE IN HPA 1023.0 1018.1 1017.2 1020.1 1006.5 999.7 994.3 996.9 1014.8 1016.7 1018.0 1026.6 1026.6 DAY 20 21 4 6 14 1 24 14 24 11 22 9 MIN. QFF PRESSURE IN HPA 1006.1 1004.4 1003.9 999.5 998.0 986.9 986.0 988.3 993.7 1007.2 1007.1 1009.7 986.0 DAY 17 13 13 4 28 30 21 3 1 4 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.3 858.5 860.4 858.9 857.3 851.3 849.2 851.9 858.6 862.7 863.6 863.3 858.1 MAX. QFE PRESSURE IN HPA 866.4 862.1 864.1 864.1 860.9 854.2 852.0 854.1 863.8 865.4 866.3 866.0 866.4 DAY 28 28 18 6 14 1 5 14 23 31 1 30 MIN. QFE PRESSURE IN HPA 855.7 854.7 857.1 853.6 854.1 848.0 846.6 847.6 852.2 858.9 857.9 858.9 846.6 DAY 17 19 15 4 11 30 20 3 1 3 26 4 MEAN QNH PRESSURE IN HPA 1018.4 1015.1 1017.3 1015.5 1013.7 1006.9 1004.5 1007.6 1015.3 1019.9 1021.0 1020.6 1014.7 MAX. QNH PRESSURE IN HPA 1024.2 1019.3 1021.5 1021.5 1017.9 1010.2 1007.7 1010.1 1021.2 1023.0 1024.1 1023.7 1024.2 DAY 28 28 18 6 14 1 5 14 23 31 1 30 MIN. QNH PRESSURE IN HPA 1011.9 1010.8 1013.5 1009.5 1010.1 1003.1 1001.5 1002.6 1007.9 1015.6 1014.4 1015.6 1001.5 DAY 17 19 15 4 11 30 20 3 1 3 26 4 MEAN QFF PRESSURE IN HPA 1016.4 1011.4 1010.4 1006.8 1001.5 992.4 990.0 993.4 1005.1 1011.5 1013.9 1018.2 1005.9 MAX. QFF PRESSURE IN HPA 1022.6 1017.4 1017.3 1019.3 1006.2 997.5 993.1 995.9 1013.4 1015.3 1016.6 1025.8 1025.8 DAY 28 21 4 6 13 9 4 18 23 31 21 8 MIN. QFF PRESSURE IN HPA 1007.4 1006.0 1004.7 1000.0 996.4 986.6 986.2 987.2 993.5 1004.9 1007.0 1008.4 986.2 DAY 17 12 15 4 29 30 21 3 1 2 26 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 860.0 857.4 859.2 857.5 856.1 850.0 848.0 850.6 857.0 860.8 861.6 861.4 856.6 MAX. QFE PRESSURE IN HPA 865.3 860.9 862.8 863.1 859.8 853.0 850.6 852.9 862.2 863.3 864.7 864.3 865.3 DAY 28 28 18 16 14 9 4 14 23 31 1 10 MIN. QFE PRESSURE IN HPA 855.1 854.0 856.1 853.2 853.4 846.8 845.1 847.0 850.7 856.8 855.7 856.9 845.1 DAY 26 19 15 3 28 29 20 3 1 3 26 4 MEAN QNH PRESSURE IN HPA 1016.8 1013.8 1015.9 1013.9 1012.4 1005.4 1003.1 1006.1 1013.4 1017.8 1018.7 1018.5 1013.0 MAX. QNH PRESSURE IN HPA 1022.9 1017.9 1020.1 1020.4 1016.6 1008.8 1006.1 1008.7 1019.4 1020.6 1022.2 1021.8 1022.9 DAY 28 28 18 16 14 9 4 14 23 31 1 10 MIN. QNH PRESSURE IN HPA 1011.2 1010.0 1012.4 1009.1 1009.3 1001.7 999.8 1002.0 1006.2 1013.2 1011.9 1013.3 999.8 DAY 26 19 15 3 28 29 20 3 1 3 26 4 MEAN QFF PRESSURE IN HPA 1014.4 1009.8 1008.8 1005.1 1000.4 990.8 988.5 991.9 1002.9 1009.1 1011.5 1015.6 1004.1 MAX. QFF PRESSURE IN HPA 1021.5 1015.2 1015.5 1015.9 1005.7 995.9 991.6 994.5 1010.8 1013.1 1014.1 1024.4 1024.4 DAY 28 21 18 6 13 14 4 19 23 14 22 27 MIN. QFF PRESSURE IN HPA 1006.8 1004.6 1003.3 999.8 996.3 985.4 984.4 986.4 991.2 1002.6 1003.9 1005.6 984.4 DAY 17 13 15 4 28 29 20 3 1 2 26 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 859.0 856.5 858.0 856.0 854.6 848.5 846.7 849.0 855.8 859.6 860.4 860.5 855.4 MAX. QFE PRESSURE IN HPA 864.6 860.1 861.1 862.2 858.6 851.2 849.0 851.4 861.3 862.1 863.6 863.5 864.6 DAY 28 28 18 5 14 1 5 14 23 31 4 10 MIN. QFE PRESSURE IN HPA 854.9 852.7 855.3 851.6 851.6 845.2 843.6 845.4 848.7 855.6 855.0 856.1 843.6 DAY 25 12 14 3 28 30 20 1 1 3 26 4 MEAN QNH PRESSURE IN HPA 1015.7 1012.8 1014.6 1012.3 1010.7 1003.7 1001.6 1004.2 1012.0 1016.4 1017.4 1017.4 1011.6 MAX. QNH PRESSURE IN HPA 1022.1 1017.0 1018.1 1019.4 1015.2 1006.8 1004.2 1007.0 1018.3 1019.3 1021.0 1020.9 1022.1 DAY 28 28 18 5 14 1 5 14 23 31 4 10 MIN. QNH PRESSURE IN HPA 1011.0 1008.5 1011.5 1007.2 1007.2 999.9 998.1 1000.1 1003.9 1011.8 1011.1 1012.4 998.1 DAY 25 12 14 3 28 30 20 1 1 3 26 4 MEAN QFF PRESSURE IN HPA 1013.6 1009.1 1007.9 1004.1 999.1 990.0 987.4 990.7 1002.2 1008.5 1010.8 1014.9 1003.2 MAX. QFF PRESSURE IN HPA 1020.8 1013.5 1014.1 1014.8 1005.0 994.2 991.7 993.9 1010.4 1011.8 1014.1 1022.7 1022.7 DAY 28 21 3 5 13 13 10 22 22 31 4 27 MIN. QFF PRESSURE IN HPA 1007.0 1004.3 1002.8 996.5 994.8 984.2 982.7 985.6 990.2 1002.9 1004.0 1005.8 982.7 DAY 17 12 15 3 28 29 20 3 1 3 26 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.7 857.0 858.7 856.8 855.0 849.0 847.3 849.5 856.7 860.6 861.5 861.6 856.1 MAX. QFE PRESSURE IN HPA 865.1 860.3 862.2 864.2 858.7 851.3 849.0 852.3 862.4 863.0 864.1 864.6 865.1 DAY 28 28 26 5 14 1 4 14 23 31 1 15 MIN. QFE PRESSURE IN HPA 855.0 853.1 855.7 852.1 852.1 845.4 844.0 846.2 849.5 857.9 857.1 857.5 844.0 DAY 25 12 21 3 28 30 20 3 1 3 26 4 MEAN QNH PRESSURE IN HPA 1016.5 1013.4 1015.3 1013.2 1011.2 1004.2 1002.3 1004.8 1013.1 1017.6 1018.5 1018.7 1012.4 MAX. QNH PRESSURE IN HPA 1022.7 1017.2 1019.4 1021.7 1015.4 1006.9 1004.2 1008.0 1019.6 1020.3 1021.5 1022.1 1022.7 DAY 28 28 26 5 14 1 4 14 23 31 1 15 MIN. QNH PRESSURE IN HPA 1011.1 1008.9 1011.9 1007.8 1007.8 1000.1 998.5 1001.0 1004.8 1014.4 1013.5 1014.0 998.5 DAY 25 12 21 3 28 30 20 3 1 3 26 4 MEAN QFF PRESSURE IN HPA 1015.8 1011.0 1009.6 1005.8 999.8 990.7 988.6 991.9 1004.4 1010.8 1013.3 1017.6 1004.9 MAX. QFF PRESSURE IN HPA 1022.3 1016.6 1016.1 1019.3 1004.6 994.8 991.9 995.5 1013.3 1014.7 1016.5 1025.1 1025.1 DAY 28 21 4 5 14 1 6 14 23 11 23 9 MIN. QFF PRESSURE IN HPA 1008.8 1004.6 1004.3 997.7 994.7 984.5 983.4 987.1 991.8 1006.0 1007.0 1008.0 983.4 DAY 25 12 15 3 28 30 20 3 1 1 26 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 860.2 857.6 859.5 857.9 856.3 850.4 849.0 851.2 858.1 861.7 862.1 862.2 857.2 MAX. QFE PRESSURE IN HPA 865.6 862.4 862.4 864.9 859.3 853.0 851.0 853.8 863.3 864.4 865.6 865.4 865.6 DAY 28 28 26 5 7 9 6 14 23 31 4 19 MIN. QFE PRESSURE IN HPA 855.7 853.3 856.7 853.0 853.6 847.1 846.3 847.2 852.2 858.5 858.1 858.3 846.3 DAY 25 12 21 3 28 29 20 2 1 3 26 4 MEAN QNH PRESSURE IN HPA 1017.1 1014.1 1016.2 1014.4 1012.7 1005.9 1004.2 1006.7 1014.7 1018.8 1019.2 1019.4 1013.6 MAX. QNH PRESSURE IN HPA 1023.3 1019.6 1019.6 1022.5 1016.0 1008.8 1006.5 1009.7 1020.6 1021.9 1023.3 1023.0 1023.3 DAY 28 28 26 5 7 9 6 14 23 31 4 19 MIN. QNH PRESSURE IN HPA 1011.9 1009.2 1013.1 1008.8 1009.5 1002.1 1001.2 1002.2 1007.9 1015.1 1014.7 1014.9 1001.2 DAY 25 12 21 3 28 29 20 2 1 3 26 4 MEAN QFF PRESSURE IN HPA 1015.1 1010.3 1009.2 1005.6 1000.3 991.2 989.8 992.6 1004.6 1010.4 1012.2 1016.9 1004.9 MAX. QFF PRESSURE IN HPA 1022.6 1016.1 1016.4 1019.1 1005.0 996.6 992.6 995.4 1012.5 1014.6 1015.1 1026.0 1026.0 DAY 28 4 3 5 7 9 6 14 23 10 6 8 MIN. QFF PRESSURE IN HPA 1007.8 1003.2 1004.2 998.4 995.2 985.5 985.4 987.0 994.0 1004.6 1007.6 1006.9 985.4 DAY 5 12 12 3 29 29 20 2 1 2 26 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 859.9 857.4 859.1 857.4 855.9 850.1 848.9 851.1 857.7 861.3 861.8 861.8 856.9 MAX. QFE PRESSURE IN HPA 864.9 861.4 861.8 864.2 859.1 852.5 851.6 853.1 862.9 864.6 865.3 865.4 865.4 DAY 28 28 26 5 14 1 5 14 23 31 4 19 MIN. QFE PRESSURE IN HPA 854.4 853.3 856.3 852.0 852.2 847.1 846.6 846.4 851.9 857.8 858.1 858.2 846.4 DAY 16 12 14 3 28 29 20 2 1 2 26 3 MEAN QNH PRESSURE IN HPA 1016.8 1013.9 1015.9 1013.9 1012.1 1005.5 1004.1 1006.6 1014.2 1018.4 1018.9 1018.9 1013.3 MAX. QNH PRESSURE IN HPA 1022.5 1018.5 1018.9 1021.7 1015.8 1008.3 1007.2 1008.9 1020.2 1022.1 1022.9 1023.0 1023.0 DAY 28 28 26 5 14 1 5 14 23 31 4 19 MIN. QNH PRESSURE IN HPA 1010.4 1009.2 1012.6 1007.7 1007.9 1002.1 1001.5 1001.3 1007.6 1014.3 1014.7 1014.8 1001.3 DAY 16 12 14 3 28 29 20 2 1 2 26 3 MEAN QFF PRESSURE IN HPA 1014.4 1009.9 1008.6 1005.0 999.8 990.8 989.2 992.2 1003.8 1009.7 1011.9 1016.1 1004.3 MAX. QFF PRESSURE IN HPA 1021.7 1015.6 1015.6 1017.9 1004.6 995.6 992.7 995.0 1011.7 1013.8 1015.1 1023.7 1023.7 DAY 28 4 18 5 7 12 5 17 23 10 6 8 MIN. QFF PRESSURE IN HPA 1005.6 1002.6 1003.6 997.5 994.8 985.9 985.9 985.2 992.9 1003.4 1006.8 1007.2 985.2 DAY 16 12 14 3 28 29 20 2 1 2 25 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.4 10.9 13.2 20.1 25.4 30.1 31.4 29.9 24.8 20.5 13.8 9.0 19.9 MINIMUN AIR TEMPERATURE (C) 1.8 4.1 7.1 12.7 17.1 21.2 24.2 21.2 15.1 11.6 4.5 4.9 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 17 28 16 0 0 0 0 61 DAYS WITH MINIMUM TEMP. <=-4 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH FREEZING MIN.<= 0 11 4 2 0 0 0 0 0 0 0 4 1 22 TEMPERATURE RECORDS LOWEST(C) -4.4 -3.6 -1.4 6.6 13.8 16.2 19.2 17.0 11.4 2.0 -3.6 -1.4 -4.4 DAY 5 15 7 9 25 1 29 31 6 29 29 1 MAXIMUM AIR TEMPERATURE (C) 16.9 17.0 19.3 26.7 32.3 36.8 37.8 37.5 32.8 28.5 22.7 13.2 26.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 28 30 30 31 29 13 0 0 165 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 25.4 30.6 36.0 40.3 41.4 41.5 35.2 34.6 28.4 18.4 41.5 DAY 19 7 27 21 7 18 4 13 13 5 4 2 DIF. BETWEEN (MAX.-MIN.) (C) 15.1 12.9 12.2 14.0 15.2 15.6 13.6 16.3 17.7 16.9 18.2 8.3 14.7 MEAN DAILY TEMP. (MDT) (C) 9.4 10.5 13.2 19.7 24.7 29.0 31.0 29.4 23.9 20.0 13.6 9.1 19.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 13.7 113.4 240.3 310.2 259.1 88.5 26.8 0.0 0.0 1052.0 HEATING DEG. DAYS(BASE 18 0C) 268.1 209.0 155.1 10.2 0.0 0.0 0.0 0.0 0.0 23.4 132.8 276.4 1074.9 DEWPOINT (MEAN C) -3.2 -2.8 -1.3 0.4 2.3 4.0 9.3 5.1 2.4 1.1 -5.1 4.3 1.4 MIXING RATIO (G/KG) 3.75 3.89 4.68 5.06 5.57 6.21 9.40 6.83 5.51 5.05 3.34 6.25 5.46 VAPOUR PRESSURE (HPA) 5.16 5.34 6.40 6.90 7.59 8.42 12.59 9.23 7.51 6.92 4.58 8.57 7.44 SATURATION DEF. (HPA) 7.32 8.45 9.59 17.64 26.01 35.97 35.13 34.66 25.42 18.95 12.78 3.17 19.59 RELATIVE HUMIDITY (MEAN %) 45 42 42 32 24 21 30 23 25 30 30 75 35 RELATIVE HUMIDITY (MAX. %) 69 62 63 55 35 34 47 38 40 44 50 90 52 RELATIVE HUMIDITY (MIN. %) 25 25 25 16 16 13 19 12 15 19 16 59 22 RELATIVE HUMIDITY (MEAN% 03UTC) 63 57 59 47 30 27 41 34 34 42 41 84 47 RELATIVE HUMIDITY (MEAN% 09UTC) 31 30 29 19 18 14 22 15 17 21 18 63 25 RELATIVE HUMIDITY (MEAN% 15UTC) 36 33 35 23 19 16 22 16 19 25 27 72 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.7 16.8 61.9 12.1 4.4 1.6 5.2 0.0 0.0 0.1 0.2 174.8 277.8 DAYS WITH PRECIPITATION >=10 0 1 2 1 0 0 0 0 0 0 0 5 9 DAYS WITH PRECIPITATION >= 5 0 1 4 1 0 0 0 0 0 0 0 8 14 DAYS WITH PRECIPITATION >= 1 0 2 6 1 1 1 2 0 0 0 0 13 26 DAYS WITH PRECIPITATION 2 6 7 6 1 2 4 0 1 3 1 19 52 GREATEST DAILY PRECIPITATION 0.7 14.0 27.0 10.4 4.4 1.4 2.2 0.0 0.0 0.1 0.2 51.0 51.0 DAY 26 24 23 24 31 1 24 ** ** 27 7 12 DAY WITH THUNDER STORM 0 0 2 3 1 1 1 0 0 0 0 3 11 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 6 9 9 13 9 6 14 3 2 3 1 78 WIND DIRECTION (PREVAILING) 270 270 180 270 270 270 360 270 270 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 7.7 7.3 12.6 10.2 9.7 9.3 8.4 12.0 8.3 7.4 6.2 11.1 8.9 PREVAILING WIND PERCENT 12.9 17.4 10.9 17.5 15.7 15.8 11.7 19.8 12.5 14.1 12.1 11.1 13.5 CALMS PERCENT OF WIND 62.1 46.9 58.9 48.8 56.5 50.8 56.9 57.7 65.0 62.9 65.4 67.1 58.3 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 243 2915 VECTOR WIND DIRECTION (MEAN) 221 217 214 235 283 306 359 276 289 280 270 193 255 VECTOR WIND MAGNITUDE(KNOTS) 1.5 2.7 2.0 2.9 1.9 1.5 1.4 3.2 1.0 1.5 0.8 1.3 1.4 WIND STEADINESES (MEAN %) 48.4 57.4 47.6 63.0 45.2 34.9 40.0 69.6 35.7 57.7 33.3 50.0 38.9 WIND SPEED (MEAN KNOTS) 3.1 4.7 4.2 4.6 4.2 4.3 3.5 4.6 2.8 2.6 2.4 2.6 3.6 FASTEST WIND DIRECTION 140 210 260 280 290 280 320 280 290 310 200 190 260 FASTEST WIND SPEED (KNOTS) 21 23 31 25 27 19 29 27 21 19 21 19 31 DAY 26 5 27 14 21 9 17 13 14 27 26 7 DAYS WITH SKY CLEAR (0-2)/8 22 13 14 12 27 28 22 29 28 29 29 6 259 DAYS WITH P.CLOUDY (3-6)/8 8 9 9 16 4 2 9 2 2 2 1 12 76 DAYS WITH CLOUDY (7-8)/8 1 6 8 2 0 0 0 0 0 0 0 13 30 DAYS WITH VISIBILITY =< 2 KM 0 1 6 1 0 0 1 3 2 0 1 4 19 DURATION OF SUNSHINE HOURS 265.2 188.3 227.6 281.5 ****** 215.7 311.2 335.8 300.6 304.0 283.1 122.1 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 861.2 858.7 858.2 857.1 856.1 852.3 848.2 851.1 855.9 859.9 860.7 862.0 856.8 MAX. QFE PRESSURE IN HPA 866.1 864.6 864.6 863.4 861.9 858.8 852.3 855.5 860.9 865.5 865.0 865.9 866.1 DAY-HOUR 29- 6 1- 6 3- 6 11- 6 26-18 2- 6 28- 3 11- 6 13- 6 25- 6 30- 6 11- 6 MIN. QFE PRESSURE IN HPA 855.4 852.9 850.3 850.0 848.2 847.2 842.6 845.6 850.2 854.3 853.0 859.0 842.6 DAY-HOUR 13-12 24-12 27-12 16-12 15-12 17-15 16-12 3-12 3-12 15-12 26-12 13-12 MEAN QNH PRESSURE IN HPA 1018.2 1015.3 1014.7 1013.5 1012.4 1008.0 1003.4 1006.6 1012.2 1016.7 1017.7 1019.1 1013.2 MAX. QNH PRESSURE IN HPA 1023.8 1022.1 1022.1 1020.7 1019.0 1015.5 1008.0 1011.7 1017.9 1023.1 1022.6 1023.6 1023.8 DAY-HOUR 29- 6 1- 6 3- 6 11- 6 26-18 2- 6 28- 3 11- 6 13- 6 25- 6 30- 6 11- 6 MIN. QNH PRESSURE IN HPA 1011.6 1008.7 1005.7 1005.4 1003.3 1002.2 996.9 1000.3 1005.6 1010.3 1008.8 1015.7 996.9 DAY-HOUR 13-12 24-12 27-12 16-12 15-12 17-15 16-12 3-12 3-12 15-12 26-12 13-12 MEAN QFF PRESSURE IN HPA 1015.9 1012.0 1010.2 1005.0 1001.0 994.2 988.5 992.7 1001.1 1008.1 1012.8 1016.9 1004.9 MAX. QFF PRESSURE IN HPA 1024.0 1019.4 1020.2 1013.1 1009.0 1005.5 995.7 998.5 1006.4 1019.1 1022.5 1023.7 1024.0 DAY-HOUR 16- 3 1- 3 3- 3 11- 3 27- 3 2- 6 28- 3 11- 3 13- 3 30- 3 30- 6 11- 6 MIN. QFF PRESSURE IN HPA 1007.9 1003.0 996.8 995.6 992.3 986.8 981.1 985.7 993.9 1000.8 1002.8 1009.2 981.1 DAY-HOUR 1-21 10-12 27-12 16-12 15-15 17-15 16-12 13-12 1- 9 13-12 26- 9 6-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 860.8 858.3 857.7 856.8 856.1 852.5 848.4 851.2 855.9 859.8 860.5 861.6 856.6 MAX. QFE PRESSURE IN HPA 864.1 862.9 862.0 861.4 861.0 857.3 851.5 854.0 858.9 864.0 863.2 863.8 864.1 DAY 16 1 3 4 27 3 28 19 13 26 18 11 MIN. QFE PRESSURE IN HPA 856.6 854.5 852.1 852.5 849.6 848.9 845.4 847.2 851.9 856.2 854.8 859.4 845.4 DAY 2 25 27 16 15 18 17 3 1 15 26 7 MEAN QNH PRESSURE IN HPA 1017.8 1014.9 1014.2 1013.1 1012.4 1008.3 1003.5 1006.8 1012.2 1016.6 1017.4 1018.7 1013.0 MAX. QNH PRESSURE IN HPA 1021.5 1020.2 1019.1 1018.5 1018.0 1013.8 1007.1 1010.0 1015.6 1021.4 1020.5 1021.2 1021.5 DAY 16 1 3 4 27 3 28 19 13 26 18 11 MIN. QNH PRESSURE IN HPA 1013.0 1010.5 1007.8 1008.3 1004.9 1004.1 1000.1 1002.2 1007.6 1012.5 1010.9 1016.2 1000.1 DAY 2 25 27 16 15 18 17 3 1 15 26 7 MEAN QFF PRESSURE IN HPA 1015.2 1011.5 1009.6 1004.7 1001.2 994.9 988.6 993.0 1001.2 1007.9 1012.3 1016.3 1004.7 MAX. QFF PRESSURE IN HPA 1020.8 1016.8 1018.0 1012.0 1007.8 1004.9 994.3 996.5 1004.3 1015.7 1020.5 1020.3 1020.8 DAY 16 1 7 11 27 1 24 11 13 30 29 12 MIN. QFF PRESSURE IN HPA 1008.9 1006.0 998.6 997.8 994.6 989.2 984.1 987.5 995.0 1002.6 1004.7 1010.7 984.1 DAY 2 10 27 16 15 18 17 14 1 13 26 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 861.5 859.2 858.7 857.9 857.1 853.5 849.2 852.2 856.8 860.7 861.4 862.3 857.5 MAX. QFE PRESSURE IN HPA 864.5 863.7 863.4 862.6 861.8 858.6 852.3 855.1 860.4 864.9 863.8 865.3 865.3 DAY 16 1 3 11 27 2 28 11 13 27 30 11 MIN. QFE PRESSURE IN HPA 858.0 855.7 852.8 852.7 850.7 849.6 845.8 847.7 851.6 857.3 855.2 860.3 845.8 DAY 2 25 27 16 15 18 17 3 4 15 26 13 MEAN QNH PRESSURE IN HPA 1018.6 1016.0 1015.3 1014.4 1013.6 1009.3 1004.5 1007.9 1013.2 1017.7 1018.4 1019.5 1014.0 MAX. QNH PRESSURE IN HPA 1022.0 1021.1 1020.7 1019.8 1018.9 1015.2 1008.0 1011.2 1017.3 1022.5 1021.2 1022.9 1022.9 DAY 16 1 3 11 27 2 28 11 13 27 30 11 MIN. QNH PRESSURE IN HPA 1014.6 1011.9 1008.6 1008.5 1006.2 1004.9 1000.6 1002.8 1007.2 1013.8 1011.4 1017.2 1000.6 DAY 2 25 27 16 15 18 17 3 4 15 26 13 MEAN QFF PRESSURE IN HPA 1017.4 1013.6 1011.5 1006.7 1002.8 996.0 990.0 994.6 1003.1 1010.3 1015.0 1017.8 1006.6 MAX. QFF PRESSURE IN HPA 1024.0 1019.4 1020.2 1013.1 1009.0 1005.4 995.7 998.5 1006.4 1019.1 1022.5 1023.2 1024.0 DAY 16 1 3 11 27 2 28 11 13 30 30 11 MIN. QFF PRESSURE IN HPA 1009.9 1006.2 999.9 998.7 994.9 989.6 984.8 989.3 995.9 1004.6 1006.2 1012.0 984.8 DAY 26 10 27 16 15 18 17 3 1 13 26 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 862.9 860.3 859.7 858.6 857.4 853.6 849.3 852.3 857.2 861.3 862.2 863.4 858.2 MAX. QFE PRESSURE IN HPA 866.1 864.6 864.6 863.4 861.6 858.8 852.2 855.5 860.9 865.5 865.0 865.9 866.1 DAY 29 1 3 11 27 2 28 11 13 25 30 11 MIN. QFE PRESSURE IN HPA 859.2 856.5 853.4 853.4 850.8 850.3 845.4 847.8 852.4 857.2 855.6 861.1 845.4 DAY 13 24 27 16 15 18 17 3 1 15 26 13 MEAN QNH PRESSURE IN HPA 1020.2 1017.1 1016.5 1015.3 1013.8 1009.5 1004.6 1008.0 1013.6 1018.3 1019.4 1020.7 1014.8 MAX. QNH PRESSURE IN HPA 1023.8 1022.1 1022.1 1020.7 1018.7 1015.5 1007.9 1011.7 1017.9 1023.1 1022.6 1023.6 1023.8 DAY 29 1 3 11 27 2 28 11 13 25 30 11 MIN. QNH PRESSURE IN HPA 1015.9 1012.8 1009.3 1009.3 1006.3 1005.7 1000.1 1002.9 1008.1 1013.6 1011.8 1018.1 1000.1 DAY 13 24 27 16 15 18 17 3 1 15 26 13 MEAN QFF PRESSURE IN HPA 1017.9 1013.6 1011.8 1006.5 1002.1 995.3 989.3 993.5 1001.9 1009.1 1014.1 1018.5 1006.1 MAX. QFF PRESSURE IN HPA 1022.2 1018.5 1019.3 1012.9 1007.9 1005.5 994.3 997.5 1005.5 1016.4 1022.5 1023.7 1023.7 DAY 16 1 3 11 27 2 24 11 28 29 30 11 MIN. QFF PRESSURE IN HPA 1011.6 1006.6 999.9 998.9 993.9 989.5 983.5 987.7 995.5 1003.0 1006.0 1013.8 983.5 DAY 26 10 27 16 15 17 17 3 1 13 26 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 860.8 858.5 858.2 857.3 856.0 852.4 848.1 850.8 855.7 859.5 860.2 861.7 856.6 MAX. QFE PRESSURE IN HPA 863.6 862.1 862.5 861.7 860.0 857.6 851.4 854.8 859.1 863.1 863.5 864.2 864.2 DAY 29 7 2 3 27 2 28 11 12 25 30 11 MIN. QFE PRESSURE IN HPA 856.9 855.0 851.7 852.2 849.3 849.1 844.3 846.4 851.1 855.1 853.3 859.4 844.3 DAY 13 10 27 16 15 17 17 3 1 15 26 4 MEAN QNH PRESSURE IN HPA 1017.7 1015.2 1014.8 1013.7 1012.2 1008.1 1003.2 1006.3 1011.9 1016.2 1017.1 1018.8 1012.9 MAX. QNH PRESSURE IN HPA 1021.0 1019.3 1019.7 1018.8 1016.8 1014.1 1007.0 1010.9 1015.8 1020.4 1020.9 1021.7 1021.7 DAY 29 7 2 3 27 2 28 11 12 25 30 11 MIN. QNH PRESSURE IN HPA 1013.3 1011.1 1007.3 1007.9 1004.6 1004.4 998.9 1001.3 1006.7 1011.2 1009.2 1016.2 998.9 DAY 13 10 27 16 15 17 17 3 1 15 26 4 MEAN QFF PRESSURE IN HPA 1014.8 1011.3 1009.8 1004.8 1000.4 993.9 987.9 992.1 1000.2 1007.0 1011.6 1016.2 1004.2 MAX. QFF PRESSURE IN HPA 1019.1 1015.1 1017.4 1011.1 1006.1 1003.4 993.8 997.0 1003.1 1014.5 1019.9 1021.1 1021.1 DAY 15 1 6 10 27 2 24 11 12 29 30 11 MIN. QFF PRESSURE IN HPA 1009.7 1004.4 997.5 997.8 993.6 988.4 982.9 986.7 993.9 1001.6 1002.8 1011.4 982.9 DAY 13 10 27 16 15 17 17 3 1 13 26 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 859.7 857.3 856.9 855.7 854.7 850.9 846.8 849.4 854.3 858.3 859.4 860.9 855.4 MAX. QFE PRESSURE IN HPA 862.6 860.9 861.0 861.0 859.6 856.1 849.6 852.8 858.0 862.4 862.5 864.0 864.0 DAY 29 1 2 11 26 1 28 11 12 26 30 11 MIN. QFE PRESSURE IN HPA 855.4 852.9 850.3 850.0 848.2 847.3 842.6 845.6 850.2 854.3 853.0 859.0 842.6 DAY 13 24 27 16 15 17 16 3 3 15 26 13 MEAN QNH PRESSURE IN HPA 1016.5 1013.8 1013.3 1012.0 1010.8 1006.5 1001.7 1004.7 1010.4 1014.9 1016.2 1017.9 1011.5 MAX. QNH PRESSURE IN HPA 1019.8 1017.9 1018.0 1018.0 1016.4 1012.4 1004.9 1008.6 1014.6 1019.6 1019.7 1021.4 1021.4 DAY 29 1 2 11 26 1 28 11 12 26 30 11 MIN. QNH PRESSURE IN HPA 1011.6 1008.7 1005.7 1005.4 1003.3 1002.3 996.9 1000.3 1005.6 1010.3 1008.8 1015.7 996.9 DAY 13 24 27 16 15 17 16 3 3 15 26 13 MEAN QFF PRESSURE IN HPA 1013.9 1010.4 1008.7 1003.5 999.6 993.0 986.9 991.0 999.4 1006.1 1011.2 1015.5 1003.3 MAX. QFF PRESSURE IN HPA 1018.7 1014.9 1017.2 1010.9 1005.6 1003.1 992.3 995.2 1003.6 1014.6 1020.2 1021.4 1021.4 DAY 15 1 6 11 26 1 24 11 12 29 28 11 MIN. QFF PRESSURE IN HPA 1008.0 1003.0 996.8 995.6 993.2 987.5 981.1 985.7 994.0 1000.8 1003.0 1011.1 981.1 DAY 13 10 27 16 15 17 16 13 1 13 26 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 860.9 858.1 857.6 856.4 855.1 851.2 847.2 850.1 855.1 859.3 860.4 861.9 856.1 MAX. QFE PRESSURE IN HPA 863.8 861.3 861.8 862.0 859.7 856.6 850.3 853.1 858.3 864.0 863.8 864.8 864.8 DAY 15 7 2 11 26 1 28 11 12 26 30 11 MIN. QFE PRESSURE IN HPA 855.7 853.6 851.1 850.7 848.3 847.2 843.3 846.4 851.1 855.5 855.0 859.8 843.3 DAY 1 24 27 16 15 17 16 3 4 15 26 6 MEAN QNH PRESSURE IN HPA 1017.8 1014.7 1014.1 1012.7 1011.2 1006.7 1002.2 1005.4 1011.3 1016.0 1017.3 1019.1 1012.4 MAX. QNH PRESSURE IN HPA 1021.2 1018.3 1018.9 1019.1 1016.5 1013.0 1005.7 1008.9 1014.9 1021.4 1021.2 1022.3 1022.3 DAY 15 7 2 11 26 1 28 11 12 26 30 11 MIN. QNH PRESSURE IN HPA 1011.9 1009.5 1006.7 1006.2 1003.4 1002.2 997.7 1001.3 1006.7 1011.7 1011.1 1016.6 997.7 DAY 1 24 27 16 15 17 16 3 4 15 26 6 MEAN QFF PRESSURE IN HPA 1016.6 1012.4 1010.2 1005.0 1000.4 993.2 987.9 992.3 1001.2 1008.6 1013.9 1017.3 1004.9 MAX. QFF PRESSURE IN HPA 1022.6 1016.7 1019.5 1011.5 1006.5 1003.2 993.1 995.8 1004.2 1017.3 1022.2 1022.9 1022.9 DAY 15 14 6 11 26 1 28 11 12 29 30 11 MIN. QFF PRESSURE IN HPA 1009.8 1005.5 998.3 997.1 992.3 986.8 982.8 987.1 995.7 1003.1 1006.1 1012.5 982.8 DAY 1 24 27 16 15 17 16 13 1 12 26 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 861.6 859.0 858.7 857.3 856.5 852.4 848.6 851.6 856.3 860.3 861.0 862.5 857.1 MAX. QFE PRESSURE IN HPA 864.6 862.2 862.8 862.0 861.9 858.4 851.6 854.5 858.9 865.0 864.1 864.7 865.0 DAY 15 7 2 11 26 1 28 10 12 26 30 10 MIN. QFE PRESSURE IN HPA 856.2 854.9 853.4 852.3 849.9 848.7 844.6 847.6 852.0 856.7 856.2 860.4 844.6 DAY 1 24 26 16 15 17 16 3 4 13 26 4 MEAN QNH PRESSURE IN HPA 1018.7 1015.7 1015.3 1013.8 1012.8 1008.1 1003.8 1007.3 1012.6 1017.2 1018.0 1019.7 1013.6 MAX. QNH PRESSURE IN HPA 1022.1 1019.4 1020.1 1019.1 1019.0 1015.0 1007.2 1010.5 1015.6 1022.6 1021.5 1022.2 1022.6 DAY 15 7 2 11 26 1 28 10 12 26 30 10 MIN. QNH PRESSURE IN HPA 1012.5 1011.0 1009.3 1008.0 1005.3 1003.9 999.2 1002.6 1007.7 1013.1 1012.5 1017.3 999.2 DAY 1 24 26 16 15 17 16 3 4 13 26 4 MEAN QFF PRESSURE IN HPA 1016.3 1012.2 1010.5 1005.0 1001.1 993.8 988.6 992.9 1000.9 1008.1 1012.8 1017.6 1005.0 MAX. QFF PRESSURE IN HPA 1021.5 1016.2 1020.1 1011.2 1007.2 1004.5 994.0 996.4 1003.0 1016.1 1021.0 1022.2 1022.2 DAY 15 1 6 10 26 1 23 10 24 26 28 11 MIN. QFF PRESSURE IN HPA 1008.5 1006.3 1000.7 998.7 993.1 987.7 983.2 987.4 996.9 1001.3 1005.9 1012.1 983.2 DAY 1 9 27 16 14 17 16 3 1 13 5 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 861.3 858.6 858.1 856.9 856.2 852.1 848.6 851.3 856.0 860.0 860.6 861.9 856.8 MAX. QFE PRESSURE IN HPA 864.2 861.6 862.4 861.4 861.3 857.8 851.3 854.8 858.9 864.3 863.4 864.1 864.3 DAY 15 6 2 10 26 1 28 24 12 26 17 10 MIN. QFE PRESSURE IN HPA 856.6 854.9 852.7 852.4 849.9 848.1 845.0 847.5 852.3 856.2 855.9 859.1 845.0 DAY 1 24 26 15 14 30 16 3 3 14 25 6 MEAN QNH PRESSURE IN HPA 1018.4 1015.2 1014.7 1013.3 1012.5 1007.8 1003.7 1006.9 1012.3 1016.8 1017.6 1019.0 1013.2 MAX. QNH PRESSURE IN HPA 1021.7 1018.7 1019.6 1018.5 1018.3 1014.3 1006.9 1010.9 1015.6 1021.8 1020.7 1021.5 1021.8 DAY 15 6 2 10 26 1 28 24 12 26 17 10 MIN. QNH PRESSURE IN HPA 1013.0 1011.0 1008.5 1008.1 1005.3 1003.2 999.7 1002.5 1008.0 1012.5 1012.1 1015.8 999.7 DAY 1 24 26 15 14 30 16 3 3 14 25 6 MEAN QFF PRESSURE IN HPA 1015.5 1011.5 1009.5 1004.2 1000.8 993.4 988.6 992.6 1000.7 1007.6 1012.2 1016.4 1004.4 MAX. QFF PRESSURE IN HPA 1020.4 1015.5 1018.5 1011.1 1007.1 1003.1 993.6 996.5 1003.6 1015.1 1020.3 1021.0 1021.0 DAY 15 21 6 10 26 1 23 10 24 27 28 11 MIN. QFF PRESSURE IN HPA 1007.9 1005.9 999.0 997.5 993.7 987.8 983.7 987.5 996.4 1002.0 1005.4 1009.2 983.7 DAY 1 9 26 15 14 17 16 13 1 12 5 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.3 11.2 14.3 20.2 24.7 29.2 29.4 28.2 26.3 18.9 12.1 9.0 19.2 MINIMUN AIR TEMPERATURE (C) 1.4 4.6 9.5 11.9 15.9 20.7 19.9 18.7 15.7 9.0 3.8 0.3 11.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 15 9 5 1 0 0 0 30 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 2 5 DAYS WITH FREEZING MIN.<= 0 7 3 0 0 0 0 0 0 0 0 3 15 28 TEMPERATURE RECORDS LOWEST(C) -5.8 -2.0 4.8 5.2 9.4 12.4 16.6 13.0 12.2 2.0 -2.0 -5.8 -5.8 DAY 16 25 2 6 1 18 6 22 28 22 19 5 MAXIMUM AIR TEMPERATURE (C) 12.0 17.3 19.1 27.3 32.0 36.4 36.5 36.1 34.7 27.8 20.6 18.4 26.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 26 30 31 31 30 4 0 0 159 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.8 21.8 24.0 33.6 36.8 40.2 39.2 38.4 38.2 31.5 28.0 22.0 40.2 DAY 30 19 31 27 31 6 29 12 11 31 3 15 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 12.7 9.6 15.4 16.1 15.7 16.6 17.4 19.0 18.8 16.8 18.1 15.5 MEAN DAILY TEMP. (MDT) (C) 6.7 11.0 14.3 19.6 24.0 28.6 28.2 27.4 25.2 18.4 12.2 9.3 18.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 25.9 95.4 226.6 224.2 198.1 125.9 4.2 0.0 0.0 900.4 HEATING DEG. DAYS(BASE 18 0C) 350.1 203.8 115.0 24.6 0.0 0.0 0.0 0.0 0.0 25.6 175.7 268.9 1163.6 DEWPOINT (MEAN C) -0.4 1.9 7.0 3.7 3.6 4.2 4.9 2.0 1.5 -1.3 -5.6 -6.7 1.2 MIXING RATIO (G/KG) 4.56 5.34 7.53 6.03 5.96 6.56 6.53 5.47 5.24 4.41 3.16 2.93 5.31 VAPOUR PRESSURE (HPA) 6.25 7.31 10.26 8.23 8.13 8.88 8.84 7.43 7.13 6.04 4.34 4.04 7.24 SATURATION DEF. (HPA) 3.76 6.64 6.46 16.95 24.55 33.18 33.54 32.69 28.97 17.60 11.06 8.46 18.65 RELATIVE HUMIDITY (MEAN %) 66 58 65 38 28 23 23 20 22 28 32 37 37 RELATIVE HUMIDITY (MAX. %) 88 84 87 61 45 35 33 32 35 44 47 60 54 RELATIVE HUMIDITY (MIN. %) 42 36 45 22 16 14 15 11 13 17 19 19 22 RELATIVE HUMIDITY (MEAN% 03UTC) 80 80 82 57 39 32 31 28 33 39 41 55 50 RELATIVE HUMIDITY (MEAN% 09UTC) 50 41 52 25 18 14 16 13 14 18 23 23 26 RELATIVE HUMIDITY (MEAN% 15UTC) 60 45 56 28 21 18 18 15 19 26 28 28 30 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 61.4 84.6 118.1 4.0 1.1 0.3 0.0 0.0 0.0 0.0 3.4 0.0 272.9 DAYS WITH PRECIPITATION >=10 2 2 5 0 0 0 0 0 0 0 0 0 9 DAYS WITH PRECIPITATION >= 5 5 4 7 0 0 0 0 0 0 0 0 0 16 DAYS WITH PRECIPITATION >= 1 6 5 12 1 1 0 0 0 0 0 2 0 27 DAYS WITH PRECIPITATION 6 9 15 2 3 3 0 0 0 1 2 0 41 GREATEST DAILY PRECIPITATION 20.0 46.0 31.0 4.0 1.0 0.3 0.0 0.0 0.0 0.0 2.4 0.0 46.0 DAY 18 22 14 17 23 11 ** ** ** ** 30 ** DAY WITH THUNDER STORM 0 1 6 1 1 2 0 0 1 1 0 0 13 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 5 2 3 4 4 4 8 1 2 1 1 35 WIND DIRECTION (PREVAILING) 270 180 180 270 270 45 270 270 45 180 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.2 11.8 11.3 9.8 10.8 10.3 14.1 14.3 8.0 10.7 8.8 9.3 11.0 PREVAILING WIND PERCENT 11.7 15.1 16.9 12.1 14.5 8.4 13.8 13.3 3.8 4.4 7.5 4.0 8.7 CALMS PERCENT OF WIND 69.4 60.3 56.9 69.2 63.7 72.0 66.4 73.8 82.1 80.6 77.5 85.1 71.4 NO. OF WIND OBSERVATION 248 232 248 240 248 239 247 248 240 248 240 248 2926 VECTOR WIND DIRECTION (MEAN) 263 199 201 234 305 353 306 290 332 253 307 220 261 VECTOR WIND MAGNITUDE(KNOTS) 1.1 2.5 3.2 1.5 2.0 0.9 2.7 2.2 0.4 0.4 0.7 0.7 1.0 WIND STEADINESES (MEAN %) 44.0 61.0 68.1 48.4 54.1 29.0 67.5 68.7 26.7 21.1 36.8 46.7 34.5 WIND SPEED (MEAN KNOTS) 2.5 4.1 4.7 3.1 3.7 3.1 4.0 3.2 1.5 1.9 1.9 1.5 2.9 FASTEST WIND DIRECTION 290 190 140 280 300 320 320 280 300 30 20 280 320 FASTEST WIND SPEED (KNOTS) 27 25 21 19 21 23 31 27 19 17 16 23 31 DAY 14 16 9 30 3 30 1 1 15 2 4 2 DAYS WITH SKY CLEAR (0-2)/8 18 13 4 17 18 22 27 28 29 31 23 30 260 DAYS WITH P.CLOUDY (3-6)/8 9 10 17 10 8 8 4 3 1 0 4 1 75 DAYS WITH CLOUDY (7-8)/8 4 6 10 3 5 0 0 0 0 0 3 0 31 DAYS WITH VISIBILITY =< 2 KM 1 1 2 2 0 0 0 0 0 0 0 0 6 DURATION OF SUNSHINE HOURS 222.7 227.4 197.4 295.7 324.6 326.8 349.9 339.1 331.3 307.4 260.2 286.1 3468.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.2 858.4 857.3 857.3 856.5 852.4 850.9 852.4 854.6 859.8 862.1 862.6 857.0 MAX. QFE PRESSURE IN HPA 866.0 863.1 862.0 863.3 861.6 857.6 856.2 856.4 861.8 864.6 869.8 868.6 869.8 DAY-HOUR 2- 6 18- 6 2- 6 8- 6 4- 6 1- 3 3- 6 27- 6 25- 6 13- 6 15- 6 8- 6 MIN. QFE PRESSURE IN HPA 852.6 852.0 851.7 851.7 850.6 847.6 847.1 847.9 849.4 854.1 856.2 856.6 847.1 DAY-HOUR 13-12 22-12 14-12 28-12 29-12 19-12 24-12 14-12 19-12 4-12 10-12 15-12 MEAN QNH PRESSURE IN HPA 1017.1 1015.0 1013.8 1013.7 1012.8 1008.1 1006.4 1008.1 1010.7 1016.6 1019.2 1019.8 1013.4 MAX. QNH PRESSURE IN HPA 1023.7 1020.4 1019.1 1020.6 1018.7 1014.1 1012.5 1012.7 1018.9 1022.1 1028.1 1026.7 1028.1 DAY-HOUR 2- 6 18- 6 2- 6 8- 6 4- 6 1- 3 3- 6 27- 6 25- 6 13- 6 15- 6 8- 6 MIN. QNH PRESSURE IN HPA 1008.4 1007.7 1007.3 1007.3 1006.1 1002.6 1002.1 1003.0 1004.7 1010.1 1012.5 1013.0 1002.1 DAY-HOUR 13-12 22-12 14-12 28-12 29-12 19-12 24-12 14-12 19-12 4-12 10-12 15-12 MEAN QFF PRESSURE IN HPA 1016.5 1011.5 1008.2 1005.1 1001.8 994.7 992.8 995.2 998.9 1008.9 1015.4 1017.9 1005.6 MAX. QFF PRESSURE IN HPA 1025.6 1017.7 1016.0 1015.9 1009.7 1001.2 999.3 1002.2 1007.3 1018.2 1027.7 1026.3 1027.7 DAY-HOUR 28- 6 25- 3 2- 3 8- 3 4- 6 1- 3 3- 3 31- 3 25- 6 21- 3 19- 3 8- 3 MIN. QFF PRESSURE IN HPA 1006.8 1004.3 1002.1 996.7 993.8 990.1 987.4 988.7 992.4 1003.0 1006.9 1006.6 987.4 DAY-HOUR 13-12 22-12 27- 0 27-12 29-12 23-12 12-12 14- 9 18-12 6-12 10-12 15-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.8 858.2 856.7 857.0 856.4 852.6 851.2 852.4 854.6 859.8 861.8 862.4 856.9 MAX. QFE PRESSURE IN HPA 864.0 861.3 860.7 862.1 860.3 856.8 855.1 855.0 859.2 863.1 868.0 866.5 868.0 DAY 2 19 2 8 4 1 4 27 25 19 16 8 MIN. QFE PRESSURE IN HPA 853.5 853.8 852.9 852.8 851.5 849.5 847.8 848.7 851.7 855.6 857.3 857.5 847.8 DAY 14 23 15 11 30 20 25 14 20 5 29 16 MEAN QNH PRESSURE IN HPA 1016.6 1014.8 1013.1 1013.4 1012.7 1008.4 1006.7 1008.1 1010.6 1016.6 1018.9 1019.6 1013.3 MAX. QNH PRESSURE IN HPA 1021.4 1018.3 1017.6 1019.3 1017.2 1013.2 1011.2 1011.1 1015.9 1020.4 1026.0 1024.3 1026.0 DAY 2 19 2 8 4 1 4 27 25 19 16 8 MIN. QNH PRESSURE IN HPA 1009.4 1009.7 1008.7 1008.6 1007.1 1004.8 1002.9 1003.9 1007.3 1011.8 1013.8 1014.0 1002.9 DAY 14 23 15 11 30 20 25 14 20 5 29 16 MEAN QFF PRESSURE IN HPA 1015.7 1010.9 1007.4 1004.9 1002.0 995.1 993.2 995.2 999.0 1009.0 1014.8 1017.4 1005.4 MAX. QFF PRESSURE IN HPA 1021.6 1016.1 1014.1 1014.1 1009.0 999.5 997.1 1000.3 1004.2 1015.2 1025.2 1023.3 1025.2 DAY 28 25 2 8 4 1 9 23 26 20 19 4 MIN. QFF PRESSURE IN HPA 1009.0 1004.7 1002.1 998.2 994.9 992.1 989.3 990.3 994.8 1004.3 1007.2 1008.6 989.3 DAY 14 6 27 28 30 24 12 14 18 7 1 16 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.4 858.8 857.5 858.1 857.3 853.5 851.8 853.2 855.4 860.5 862.5 863.1 857.7 MAX. QFE PRESSURE IN HPA 864.7 861.6 861.1 862.4 860.7 857.6 856.0 855.8 860.1 863.8 868.3 867.3 868.3 DAY 2 19 2 8 4 1 4 31 25 20 15 8 MIN. QFE PRESSURE IN HPA 854.2 855.4 854.1 853.5 853.3 850.6 848.2 849.4 852.5 855.9 857.8 859.3 848.2 DAY 14 22 17 11 29 19 25 14 20 4 29 16 MEAN QNH PRESSURE IN HPA 1017.3 1015.4 1014.0 1014.6 1013.7 1009.4 1007.5 1009.1 1011.6 1017.4 1019.8 1020.4 1014.2 MAX. QNH PRESSURE IN HPA 1022.2 1018.7 1018.1 1019.6 1017.6 1014.1 1012.3 1012.0 1017.0 1021.2 1026.4 1025.2 1026.4 DAY 2 19 2 8 4 1 4 31 25 20 15 8 MIN. QNH PRESSURE IN HPA 1010.2 1011.6 1010.1 1009.4 1009.2 1006.1 1003.3 1004.7 1008.3 1012.1 1014.3 1016.0 1003.3 DAY 14 22 17 11 29 19 25 14 20 4 29 16 MEAN QFF PRESSURE IN HPA 1017.6 1013.0 1009.2 1006.9 1003.4 996.4 994.6 997.0 1001.0 1011.1 1017.1 1020.1 1007.3 MAX. QFF PRESSURE IN HPA 1024.4 1017.7 1016.0 1015.9 1009.7 1001.2 999.3 1002.2 1006.4 1018.2 1027.7 1026.3 1027.7 DAY 28 25 2 8 4 1 3 31 25 21 19 8 MIN. QFF PRESSURE IN HPA 1010.9 1006.7 1003.7 999.0 996.9 993.2 990.4 991.6 996.4 1005.6 1010.5 1012.1 990.4 DAY 13 6 27 28 30 23 25 14 20 1 1 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.7 859.9 858.5 858.8 857.7 853.6 851.9 853.6 856.0 861.3 863.5 864.3 858.4 MAX. QFE PRESSURE IN HPA 866.0 863.1 862.0 863.3 861.6 857.4 856.2 856.4 861.8 864.6 869.8 868.6 869.8 DAY 2 18 2 8 4 1 3 27 25 13 15 8 MIN. QFE PRESSURE IN HPA 855.5 855.5 854.7 854.2 853.5 850.4 848.9 849.4 852.8 857.0 858.5 860.7 848.9 DAY 13 22 17 11 29 19 25 14 20 4 29 15 MEAN QNH PRESSURE IN HPA 1018.8 1016.7 1015.2 1015.5 1014.3 1009.5 1007.6 1009.5 1012.3 1018.3 1020.8 1021.7 1015.0 MAX. QNH PRESSURE IN HPA 1023.7 1020.4 1019.1 1020.6 1018.7 1013.9 1012.5 1012.7 1018.9 1022.1 1028.1 1026.7 1028.1 DAY 2 18 2 8 4 1 3 27 25 13 15 8 MIN. QNH PRESSURE IN HPA 1011.7 1011.7 1010.8 1010.2 1009.4 1005.8 1004.1 1004.7 1008.6 1013.4 1015.1 1017.6 1004.1 DAY 13 22 17 11 29 19 25 14 20 4 29 15 MEAN QFF PRESSURE IN HPA 1018.4 1013.1 1009.7 1006.4 1002.8 995.7 993.6 996.1 999.9 1009.7 1016.6 1019.5 1006.8 MAX. QFF PRESSURE IN HPA 1025.6 1017.0 1015.8 1015.8 1009.7 999.5 998.4 1001.3 1007.3 1016.6 1026.6 1025.9 1026.6 DAY 28 1 2 7 4 11 3 31 25 20 19 8 MIN. QFF PRESSURE IN HPA 1010.2 1008.2 1004.4 998.7 996.7 992.3 989.8 989.2 994.7 1005.2 1008.1 1013.8 989.2 DAY 13 22 27 26 30 23 25 14 20 6 10 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 860.1 858.3 857.5 857.4 856.6 852.3 850.7 852.2 854.4 859.5 861.9 862.4 856.9 MAX. QFE PRESSURE IN HPA 864.3 862.0 860.5 862.1 860.2 856.4 855.8 854.9 860.3 862.9 868.3 866.8 868.3 DAY 2 18 12 7 4 1 3 27 25 13 15 8 MIN. QFE PRESSURE IN HPA 853.2 853.3 853.0 853.0 852.2 849.2 848.2 848.8 851.0 855.2 857.1 857.9 848.2 DAY 13 22 17 28 29 19 12 14 20 4 29 15 MEAN QNH PRESSURE IN HPA 1016.9 1014.9 1014.0 1013.9 1013.0 1008.0 1006.2 1007.9 1010.4 1016.3 1019.0 1019.6 1013.3 MAX. QNH PRESSURE IN HPA 1021.8 1019.1 1017.4 1019.3 1017.1 1012.7 1012.0 1011.0 1017.2 1020.2 1026.4 1024.6 1026.4 DAY 2 18 12 7 4 1 3 27 25 13 15 8 MIN. QNH PRESSURE IN HPA 1009.1 1009.2 1008.8 1008.8 1007.9 1004.5 1003.3 1004.0 1006.5 1011.4 1013.5 1014.4 1003.3 DAY 13 22 17 28 29 19 12 14 20 4 29 15 MEAN QFF PRESSURE IN HPA 1015.9 1010.8 1008.0 1004.8 1001.5 994.1 992.2 994.4 998.0 1007.9 1014.5 1016.7 1004.9 MAX. QFF PRESSURE IN HPA 1022.7 1015.0 1012.8 1014.1 1007.6 998.0 997.9 998.6 1004.7 1014.0 1023.8 1022.9 1023.8 DAY 28 24 2 7 4 1 3 31 25 20 19 8 MIN. QFF PRESSURE IN HPA 1007.5 1005.7 1003.0 998.1 994.5 991.2 988.0 988.7 993.4 1003.1 1008.0 1010.8 988.0 DAY 13 6 27 28 29 23 29 14 20 6 10 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 859.0 857.0 856.2 856.0 855.1 850.9 849.5 850.8 853.0 858.4 860.9 861.3 855.7 MAX. QFE PRESSURE IN HPA 863.1 860.7 859.4 860.8 858.6 854.6 853.9 853.4 858.7 861.6 867.6 865.9 867.6 DAY 2 18 12 7 4 1 3 27 25 13 15 7 MIN. QFE PRESSURE IN HPA 852.6 852.0 851.7 851.7 850.6 847.6 847.1 847.9 849.4 854.1 856.2 856.6 847.1 DAY 13 22 14 28 29 19 24 14 19 4 10 15 MEAN QNH PRESSURE IN HPA 1015.7 1013.4 1012.5 1012.2 1011.2 1006.4 1004.8 1006.4 1008.8 1015.0 1017.8 1018.3 1011.9 MAX. QNH PRESSURE IN HPA 1020.4 1017.6 1016.2 1017.8 1015.2 1010.7 1009.9 1009.3 1015.4 1018.7 1025.6 1023.6 1025.6 DAY 2 18 12 7 4 1 3 27 25 13 15 7 MIN. QNH PRESSURE IN HPA 1008.4 1007.7 1007.3 1007.3 1006.1 1002.6 1002.1 1003.0 1004.7 1010.1 1012.5 1013.0 1002.1 DAY 13 22 14 28 29 19 24 14 19 4 10 15 MEAN QFF PRESSURE IN HPA 1014.7 1009.6 1006.8 1003.7 1000.5 993.1 991.3 993.5 997.1 1007.3 1013.9 1015.9 1003.9 MAX. QFF PRESSURE IN HPA 1020.8 1013.5 1011.7 1012.9 1006.8 996.9 996.0 998.5 1003.7 1013.8 1023.5 1022.7 1023.5 DAY 28 24 12 7 4 1 3 31 25 20 15 7 MIN. QFF PRESSURE IN HPA 1006.8 1004.3 1002.8 996.7 993.8 990.1 987.4 989.6 992.4 1003.0 1006.9 1008.0 987.4 DAY 13 22 14 27 29 23 12 13 18 6 10 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.8 857.9 856.9 856.3 855.6 851.2 849.7 851.3 853.8 859.2 861.7 862.3 856.3 MAX. QFE PRESSURE IN HPA 864.1 861.3 860.0 861.4 858.8 854.4 854.3 854.7 859.4 862.2 868.6 866.6 868.6 DAY 28 18 12 7 4 1 3 31 25 19 15 7 MIN. QFE PRESSURE IN HPA 853.6 853.0 851.8 852.6 851.5 848.2 847.1 848.4 850.3 855.0 856.4 857.1 847.1 DAY 13 22 14 28 29 19 24 14 19 6 10 15 MEAN QNH PRESSURE IN HPA 1016.7 1014.4 1013.3 1012.7 1011.8 1006.7 1005.1 1006.9 1009.8 1016.0 1018.8 1019.5 1012.6 MAX. QNH PRESSURE IN HPA 1021.5 1018.3 1016.8 1018.5 1015.5 1010.4 1010.3 1010.8 1016.2 1019.4 1026.7 1024.4 1026.7 DAY 28 18 12 7 4 1 3 31 25 19 15 7 MIN. QNH PRESSURE IN HPA 1009.5 1008.8 1007.5 1008.4 1007.1 1003.3 1002.1 1003.6 1005.7 1011.1 1012.7 1013.5 1002.1 DAY 13 22 14 28 29 19 24 14 19 6 10 15 MEAN QFF PRESSURE IN HPA 1016.8 1011.9 1008.4 1004.9 1001.5 993.8 992.1 994.9 999.1 1009.5 1016.3 1019.1 1005.7 MAX. QFF PRESSURE IN HPA 1023.1 1016.0 1013.0 1014.5 1007.8 997.4 997.3 1001.6 1005.9 1016.6 1025.2 1025.6 1025.6 DAY 28 24 12 7 4 1 3 31 25 21 15 7 MIN. QFF PRESSURE IN HPA 1009.0 1005.6 1003.8 998.3 995.3 990.2 989.0 990.7 994.8 1004.4 1008.7 1011.6 989.0 DAY 13 22 14 28 29 23 25 1 18 6 10 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 860.6 858.8 857.8 857.6 856.9 852.8 851.2 852.8 855.0 860.1 862.3 862.9 857.4 MAX. QFE PRESSURE IN HPA 865.0 862.1 860.8 862.3 859.9 856.0 855.8 856.2 859.7 863.4 868.7 867.6 868.7 DAY 28 18 1 7 3 10 3 31 25 13 15 7 MIN. QFE PRESSURE IN HPA 854.1 853.3 852.4 853.6 852.7 849.8 848.5 849.6 851.6 855.9 858.2 857.8 848.5 DAY 13 22 14 10 29 19 24 13 19 4 10 15 MEAN QNH PRESSURE IN HPA 1017.6 1015.5 1014.3 1014.1 1013.3 1008.6 1006.8 1008.6 1011.1 1017.0 1019.5 1020.2 1013.9 MAX. QNH PRESSURE IN HPA 1022.6 1019.3 1017.8 1019.5 1016.7 1012.3 1012.0 1012.5 1016.5 1020.7 1026.8 1025.6 1026.8 DAY 28 18 1 7 3 10 3 31 25 13 15 7 MIN. QNH PRESSURE IN HPA 1010.1 1009.2 1008.1 1009.5 1008.5 1005.2 1003.7 1004.9 1007.2 1012.1 1014.8 1014.3 1003.7 DAY 13 22 14 10 29 19 24 13 19 4 10 15 MEAN QFF PRESSURE IN HPA 1017.2 1011.9 1008.8 1005.0 1001.8 994.8 992.8 995.3 998.6 1008.5 1015.3 1018.0 1005.7 MAX. QFF PRESSURE IN HPA 1024.3 1016.2 1014.2 1014.3 1007.6 998.3 997.6 1001.9 1004.9 1015.4 1025.2 1025.2 1025.2 DAY 28 24 1 7 3 10 3 31 25 21 18 7 MIN. QFF PRESSURE IN HPA 1009.0 1005.5 1004.2 998.3 995.5 991.8 989.5 989.7 993.9 1003.4 1007.8 1008.5 989.5 DAY 13 22 19 25 29 23 25 13 19 6 10 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 860.1 858.4 857.4 857.2 856.5 852.6 851.0 852.6 854.7 860.0 862.0 862.5 857.1 MAX. QFE PRESSURE IN HPA 864.5 861.7 860.9 862.3 860.0 855.8 855.6 856.2 858.6 863.1 868.4 867.1 868.4 DAY 28 18 1 7 3 10 3 31 24 19 15 7 MIN. QFE PRESSURE IN HPA 853.7 853.4 852.7 853.3 851.3 849.5 848.1 849.2 851.8 855.6 857.9 857.4 848.1 DAY 13 22 14 10 29 19 24 13 19 4 10 15 MEAN QNH PRESSURE IN HPA 1017.0 1015.1 1013.8 1013.7 1012.9 1008.4 1006.5 1008.4 1010.8 1016.8 1019.1 1019.7 1013.5 MAX. QNH PRESSURE IN HPA 1022.0 1018.8 1017.9 1019.5 1016.8 1012.0 1011.8 1012.5 1015.2 1020.4 1026.5 1025.0 1026.5 DAY 28 18 1 7 3 10 3 31 24 19 15 7 MIN. QNH PRESSURE IN HPA 1009.6 1009.3 1008.5 1009.2 1006.9 1004.8 1003.2 1004.5 1007.5 1011.8 1014.4 1013.9 1003.2 DAY 13 22 14 10 29 19 24 13 19 4 10 15 MEAN QFF PRESSURE IN HPA 1016.0 1010.9 1007.9 1004.6 1001.3 994.4 992.6 995.0 998.4 1008.5 1014.8 1017.0 1005.1 MAX. QFF PRESSURE IN HPA 1022.6 1015.4 1014.2 1014.2 1007.3 998.0 997.5 1001.8 1003.7 1014.3 1024.6 1023.6 1024.6 DAY 28 24 1 7 3 10 3 31 30 20 18 7 MIN. QFF PRESSURE IN HPA 1008.9 1005.6 1002.8 998.2 993.8 991.7 989.3 989.1 994.5 1003.5 1008.5 1006.6 989.1 DAY 13 5 26 28 29 23 28 13 19 6 10 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.9 11.3 13.6 19.0 24.0 28.0 31.1 29.3 26.3 19.9 13.2 9.3 19.4 MINIMUN AIR TEMPERATURE (C) 0.9 4.1 8.6 12.4 16.5 20.0 21.9 20.0 16.4 12.2 7.9 3.9 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 13 21 16 0 0 0 0 51 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 12 7 0 0 0 0 0 0 0 0 1 4 24 TEMPERATURE RECORDS LOWEST(C) -3.2 -3.8 0.4 4.2 12.6 15.2 16.0 12.5 12.2 8.0 0.0 -3.5 -3.8 DAY 20 10 2 15 11 5 12 27 26 18 26 29 MAXIMUM AIR TEMPERATURE (C) 14.7 18.6 18.6 25.3 30.7 35.4 39.1 37.3 35.0 27.7 18.8 15.2 26.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 18 29 31 31 30 12 0 0 151 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.8 25.8 23.0 27.5 35.5 40.4 42.0 41.0 37.6 35.2 25.2 18.0 42.0 DAY 1 23 29 11 24 17 18 11 2 1 6 2 DIF. BETWEEN (MAX.-MIN.) (C) 13.8 14.5 10.0 12.9 14.2 15.4 17.2 17.3 18.6 15.5 10.9 11.3 14.3 MEAN DAILY TEMP. (MDT) (C) 7.8 11.3 13.6 18.9 23.6 27.7 30.5 28.6 25.7 19.9 13.3 9.5 19.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 8.2 86.4 200.5 294.1 235.9 141.8 35.8 0.0 0.0 1002.8 HEATING DEG. DAYS(BASE 18 0C) 316.1 191.0 136.6 21.6 0.0 0.0 0.0 0.0 0.0 19.5 140.5 262.4 1087.6 DEWPOINT (MEAN C) -3.5 -2.5 3.7 3.1 3.8 7.6 12.1 6.6 3.8 6.7 4.1 1.7 3.9 MIXING RATIO (G/KG) 3.66 3.97 6.17 6.01 6.06 8.03 11.39 7.52 6.03 7.37 6.23 5.18 6.47 VAPOUR PRESSURE (HPA) 5.02 5.45 8.40 8.20 8.26 10.85 15.23 10.16 8.22 10.08 8.54 7.11 8.79 SATURATION DEF. (HPA) 6.20 9.15 7.60 14.64 23.06 28.49 31.70 32.65 27.90 14.73 7.33 5.03 17.37 RELATIVE HUMIDITY (MEAN %) 49 43 56 39 30 32 35 26 25 48 58 62 42 RELATIVE HUMIDITY (MAX. %) 71 69 80 61 48 51 53 41 36 68 78 85 62 RELATIVE HUMIDITY (MIN. %) 30 24 39 22 17 17 21 15 16 29 40 40 26 RELATIVE HUMIDITY (MEAN% 03UTC) 65 65 74 57 42 44 49 37 33 62 76 81 57 RELATIVE HUMIDITY (MEAN% 09UTC) 36 29 45 26 19 19 25 17 17 31 43 44 29 RELATIVE HUMIDITY (MEAN% 15UTC) 42 32 46 30 25 24 27 20 21 42 50 55 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 43.3 14.2 130.0 25.4 7.0 15.7 7.6 0.0 0.0 26.6 43.3 15.6 328.7 DAYS WITH PRECIPITATION >=10 2 0 4 2 0 0 0 0 0 0 2 0 10 DAYS WITH PRECIPITATION >= 5 2 1 4 2 0 0 1 0 0 2 3 1 16 DAYS WITH PRECIPITATION >= 1 4 3 11 2 3 7 1 0 0 7 6 4 48 DAYS WITH PRECIPITATION 4 3 12 8 5 12 4 0 0 10 7 7 72 GREATEST DAILY PRECIPITATION 20.0 9.7 51.0 12.0 3.0 4.0 7.0 0.0 0.0 8.4 17.0 8.0 51.0 DAY 18 12 17 27 2 21 21 ** ** 24 23 15 DAY WITH THUNDER STORM 0 0 0 4 4 11 3 0 0 8 2 0 32 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 6 3 7 5 5 6 10 5 2 0 1 51 WIND DIRECTION (PREVAILING) 90 90 225 225 315 315 315 315 315 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 4.6 4.2 12.8 13.1 8.5 10.5 11.0 10.8 8.2 9.1 7.5 7.8 9.2 PREVAILING WIND PERCENT 10.1 22.3 21.0 19.6 20.2 17.9 18.1 21.0 19.6 22.2 15.0 17.3 16.0 CALMS PERCENT OF WIND 64.9 16.1 10.9 21.3 26.2 30.4 38.3 39.5 32.5 41.9 45.0 35.9 33.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 193 246 212 241 330 349 343 332 338 294 261 244 273 VECTOR WIND MAGNITUDE(KNOTS) 1.2 2.8 4.9 4.3 2.4 1.3 1.9 2.8 2.4 2.6 1.3 2.4 1.6 WIND STEADINESES (MEAN %) 36.4 36.8 54.4 51.2 36.4 19.7 32.8 45.9 43.6 48.1 28.3 40.7 25.8 WIND SPEED (MEAN KNOTS) 3.3 7.6 9.0 8.4 6.6 6.6 5.8 6.1 5.5 5.4 4.6 5.9 6.2 FASTEST WIND DIRECTION 250 290 200 230 70 300 330 300 60 270 180 230 70 FASTEST WIND SPEED (KNOTS) 23 23 31 25 47 29 29 27 19 23 25 31 47 DAY 26 1 8 12 29 3 10 2 6 4 23 11 DAYS WITH SKY CLEAR (0-2)/8 20 21 7 16 18 14 22 27 29 14 11 19 218 DAYS WITH P.CLOUDY (3-6)/8 9 4 10 13 13 14 8 4 1 15 15 9 115 DAYS WITH CLOUDY (7-8)/8 2 3 14 1 0 2 1 0 0 2 4 3 32 DAYS WITH VISIBILITY =< 2 KM 1 3 0 0 2 0 1 1 1 0 0 0 9 DURATION OF SUNSHINE HOURS 245.7 242.6 187.7 301.6 320.6 262.0 325.6 334.8 318.0 238.4 205.5 227.1 3209.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.6 859.0 857.2 856.9 856.7 852.7 849.3 851.9 856.8 860.7 861.2 860.5 856.9 MAX. QFE PRESSURE IN HPA 866.3 863.4 866.0 861.6 862.0 858.6 853.5 856.8 861.9 865.0 867.5 867.5 867.5 DAY-HOUR 8- 6 21- 6 11- 6 24- 6 12- 6 8- 6 5- 6 31- 6 18- 6 31- 6 8- 6 29- 6 MIN. QFE PRESSURE IN HPA 848.4 851.9 852.1 852.6 851.9 844.6 844.5 847.6 851.0 857.0 855.4 855.1 844.5 DAY-HOUR 18- 0 1- 0 30-12 29-12 20-12 29-12 11-12 1-12 2-12 1-12 24-12 11- 9 MEAN QNH PRESSURE IN HPA 1016.4 1015.7 1013.6 1013.3 1013.1 1008.4 1004.6 1007.5 1013.2 1017.7 1018.2 1017.4 1013.3 MAX. QNH PRESSURE IN HPA 1024.1 1020.7 1023.7 1018.7 1019.1 1015.2 1009.4 1013.2 1019.0 1022.6 1025.4 1025.4 1025.4 DAY-HOUR 8- 6 21- 6 11- 6 24- 6 12- 6 8- 6 5- 6 31- 6 18- 6 31- 6 8- 6 29- 6 MIN. QNH PRESSURE IN HPA 1003.6 1007.6 1007.8 1008.4 1007.6 999.2 999.1 1002.6 1006.5 1013.4 1011.6 1011.2 999.1 DAY-HOUR 18- 0 1- 0 30-12 29-12 20-12 29-12 11-12 1-12 2-12 1-12 24-12 11- 9 MEAN QFF PRESSURE IN HPA 1015.0 1012.2 1008.6 1005.4 1002.4 995.4 989.7 993.9 1001.3 1009.1 1013.5 1015.0 1005.1 MAX. QFF PRESSURE IN HPA 1022.3 1021.5 1019.5 1013.3 1011.2 1004.3 996.2 1001.0 1008.4 1017.4 1021.9 1026.8 1026.8 DAY-HOUR 8- 6 8- 6 11- 6 15- 3 8- 6 4- 6 21- 3 31- 3 18- 3 31- 3 30- 3 29- 6 MIN. QFF PRESSURE IN HPA 998.4 1002.1 1001.3 999.2 995.8 985.8 984.2 987.9 994.4 1001.8 1006.6 1006.5 984.2 DAY-HOUR 18- 0 1- 0 30-12 10-12 30-12 27-12 10-12 1-12 2-21 1-12 14- 0 11- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.3 858.5 856.6 856.5 856.4 852.6 849.4 851.8 856.7 860.5 860.8 860.0 856.6 MAX. QFE PRESSURE IN HPA 864.2 861.1 863.3 859.7 860.7 857.1 851.6 854.7 860.6 863.2 864.8 865.5 865.5 DAY 8 8 11 24 12 5 22 10 18 31 8 29 MIN. QFE PRESSURE IN HPA 848.4 851.9 852.6 854.0 853.4 846.4 846.1 848.4 852.1 858.1 856.0 855.4 846.1 DAY 18 1 18 10 30 30 11 1 3 1 24 11 MEAN QNH PRESSURE IN HPA 1016.0 1015.2 1013.0 1012.9 1012.7 1008.4 1004.7 1007.5 1013.1 1017.4 1017.8 1016.9 1013.0 MAX. QNH PRESSURE IN HPA 1021.7 1018.1 1020.6 1016.5 1017.6 1013.5 1007.2 1010.8 1017.5 1020.5 1022.3 1023.1 1023.1 DAY 8 8 11 24 12 5 22 10 18 31 8 29 MIN. QNH PRESSURE IN HPA 1003.6 1007.6 1008.4 1010.0 1009.3 1001.3 1000.9 1003.6 1007.8 1014.7 1012.3 1011.6 1000.9 DAY 18 1 18 10 30 30 11 1 3 1 24 11 MEAN QFF PRESSURE IN HPA 1014.3 1011.4 1007.9 1005.0 1002.3 995.8 990.0 993.9 1001.4 1008.9 1012.9 1014.3 1004.8 MAX. QFF PRESSURE IN HPA 1019.8 1016.6 1016.0 1010.7 1008.7 1003.5 994.1 999.5 1006.5 1015.5 1019.5 1024.4 1024.4 DAY 20 8 2 15 12 5 21 31 19 31 30 29 MIN. QFF PRESSURE IN HPA 998.4 1002.1 1001.5 1000.1 996.5 987.8 986.3 989.1 995.8 1003.1 1006.6 1007.1 986.3 DAY 18 1 30 10 30 28 11 1 3 1 14 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.0 859.3 857.5 857.6 857.6 853.7 850.3 852.9 857.8 861.4 861.8 860.9 857.6 MAX. QFE PRESSURE IN HPA 864.2 862.0 864.2 860.6 861.4 857.9 852.5 855.8 861.7 864.0 866.3 866.1 866.3 DAY 8 8 11 24 12 8 21 10 18 31 8 29 MIN. QFE PRESSURE IN HPA 850.4 852.7 853.4 854.8 853.9 846.8 845.7 849.6 854.3 858.5 856.8 856.1 845.7 DAY 18 1 30 10 30 29 11 1 2 1 24 10 MEAN QNH PRESSURE IN HPA 1016.8 1016.0 1014.0 1014.1 1014.1 1009.6 1005.8 1008.7 1014.3 1018.4 1019.0 1017.9 1014.1 MAX. QNH PRESSURE IN HPA 1021.7 1019.1 1021.7 1017.5 1018.5 1014.4 1008.3 1012.0 1018.8 1021.4 1024.1 1023.8 1024.1 DAY 8 8 11 24 12 8 21 10 18 31 8 29 MIN. QNH PRESSURE IN HPA 1005.8 1008.5 1009.3 1010.9 1009.9 1001.7 1000.5 1004.9 1010.3 1015.1 1013.2 1012.4 1000.5 DAY 18 1 30 10 30 29 11 1 2 1 24 10 MEAN QFF PRESSURE IN HPA 1016.6 1013.6 1009.7 1006.9 1004.0 997.1 991.5 995.8 1003.6 1011.1 1015.0 1016.5 1006.8 MAX. QFF PRESSURE IN HPA 1022.1 1020.5 1018.9 1013.3 1010.8 1004.0 996.2 1001.0 1008.4 1017.4 1021.9 1026.6 1026.6 DAY 8 8 2 15 8 4 21 31 18 31 30 29 MIN. QFF PRESSURE IN HPA 1001.2 1003.7 1002.8 1001.5 998.6 988.1 987.7 990.3 998.9 1005.1 1009.0 1008.3 987.7 DAY 18 1 30 11 30 29 16 1 3 1 13 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.3 860.5 858.7 858.4 858.1 853.7 850.5 853.1 858.2 862.1 862.8 862.1 858.3 MAX. QFE PRESSURE IN HPA 866.3 863.4 866.0 861.6 862.0 858.6 853.5 856.8 861.9 865.0 867.5 867.5 867.5 DAY 8 21 11 24 12 8 5 31 18 31 8 29 MIN. QFE PRESSURE IN HPA 853.2 853.9 854.4 855.6 854.6 846.7 846.1 850.5 854.6 859.2 857.4 856.7 846.1 DAY 26 1 14 10 30 29 11 1 3 1 24 11 MEAN QNH PRESSURE IN HPA 1018.4 1017.4 1015.3 1015.0 1014.7 1009.6 1006.0 1008.9 1014.8 1019.2 1020.0 1019.2 1014.9 MAX. QNH PRESSURE IN HPA 1024.1 1020.7 1023.7 1018.7 1019.1 1015.2 1009.4 1013.2 1019.0 1022.6 1025.4 1025.4 1025.4 DAY 8 21 11 24 12 8 5 31 18 31 8 29 MIN. QNH PRESSURE IN HPA 1009.1 1009.9 1010.4 1011.8 1010.7 1001.6 1000.9 1006.0 1010.7 1015.9 1013.9 1013.1 1000.9 DAY 26 1 14 10 30 29 11 1 3 1 24 11 MEAN QFF PRESSURE IN HPA 1016.9 1013.7 1010.2 1006.7 1003.7 996.2 990.6 994.9 1002.3 1010.0 1015.1 1016.7 1006.4 MAX. QFF PRESSURE IN HPA 1022.3 1021.5 1019.5 1012.7 1011.2 1004.3 994.3 1000.7 1007.7 1016.3 1021.8 1026.8 1026.8 DAY 8 8 11 15 8 4 21 31 18 31 30 29 MIN. QFF PRESSURE IN HPA 1006.4 1004.5 1003.5 1002.4 998.1 987.9 986.0 991.4 996.8 1003.7 1009.7 1008.1 986.0 DAY 18 1 30 10 30 29 11 1 3 1 13 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.5 858.9 857.5 857.0 856.7 852.5 849.1 851.6 856.5 860.2 860.7 860.0 856.7 MAX. QFE PRESSURE IN HPA 864.6 861.9 865.0 859.4 860.3 857.9 851.7 855.6 860.1 862.9 865.1 864.9 865.1 DAY 8 21 11 15 8 4 21 31 18 31 8 29 MIN. QFE PRESSURE IN HPA 852.1 852.9 853.5 854.6 853.0 845.7 845.3 848.6 852.6 857.8 855.7 855.1 845.3 DAY 26 1 30 10 30 29 11 4 2 1 24 11 MEAN QNH PRESSURE IN HPA 1016.3 1015.6 1014.0 1013.4 1013.1 1008.3 1004.4 1007.2 1012.8 1017.1 1017.7 1016.9 1013.1 MAX. QNH PRESSURE IN HPA 1022.1 1019.0 1022.6 1016.2 1017.2 1014.4 1007.3 1011.8 1017.0 1020.2 1022.7 1022.5 1022.7 DAY 8 21 11 15 8 4 21 31 18 31 8 29 MIN. QNH PRESSURE IN HPA 1007.8 1008.7 1009.4 1010.7 1008.8 1000.5 1000.0 1003.8 1008.4 1014.3 1011.9 1011.2 1000.0 DAY 26 1 30 10 30 29 11 4 2 1 24 11 MEAN QFF PRESSURE IN HPA 1014.2 1011.5 1008.4 1005.0 1002.0 994.8 989.0 993.0 1000.3 1007.9 1012.4 1014.0 1004.4 MAX. QFF PRESSURE IN HPA 1020.0 1017.9 1017.7 1011.1 1008.9 1004.1 993.3 999.2 1005.2 1013.4 1019.9 1023.5 1023.5 DAY 8 8 11 15 8 8 21 31 18 31 30 29 MIN. QFF PRESSURE IN HPA 1006.0 1003.3 1003.2 1000.4 996.5 986.6 984.8 989.1 994.9 1002.0 1007.4 1006.5 984.8 DAY 17 1 30 10 30 29 10 1 3 1 13 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.5 857.6 856.1 855.4 855.2 851.5 847.7 850.2 855.1 859.2 859.8 859.2 855.5 MAX. QFE PRESSURE IN HPA 863.2 860.6 862.7 858.8 859.0 857.1 850.5 854.0 858.5 861.9 864.3 864.3 864.3 DAY 8 21 11 23 12 8 20 31 18 9 8 29 MIN. QFE PRESSURE IN HPA 852.6 853.2 852.1 852.6 851.9 844.6 844.5 847.6 851.0 857.0 855.4 855.3 844.5 DAY 17 1 30 29 20 29 11 1 2 1 24 10 MEAN QNH PRESSURE IN HPA 1015.1 1014.1 1012.4 1011.6 1011.3 1007.1 1002.8 1005.6 1011.3 1015.9 1016.7 1016.0 1011.7 MAX. QNH PRESSURE IN HPA 1020.5 1017.5 1019.9 1015.5 1015.7 1013.5 1006.0 1010.0 1015.1 1019.0 1021.8 1021.8 1021.8 DAY 8 21 11 23 12 8 20 31 18 9 8 29 MIN. QNH PRESSURE IN HPA 1008.4 1009.1 1007.8 1008.4 1007.6 999.2 999.1 1002.6 1006.5 1013.4 1011.6 1011.5 999.1 DAY 17 1 30 29 20 29 11 1 2 1 24 10 MEAN QFF PRESSURE IN HPA 1013.4 1010.3 1007.3 1003.7 1000.9 994.6 988.0 992.1 999.4 1007.5 1011.8 1013.4 1003.5 MAX. QFF PRESSURE IN HPA 1019.2 1015.8 1016.1 1009.3 1007.2 1002.6 992.9 998.2 1003.8 1013.3 1018.7 1022.7 1022.7 DAY 19 8 1 14 7 8 20 31 18 30 30 29 MIN. QFF PRESSURE IN HPA 1004.1 1004.0 1001.3 999.2 995.8 985.8 984.2 987.9 994.5 1001.8 1007.1 1007.0 984.2 DAY 17 1 30 10 30 27 10 1 2 1 13 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.3 858.4 856.6 856.1 855.9 851.9 848.2 850.9 856.0 860.2 860.8 860.4 856.2 MAX. QFE PRESSURE IN HPA 863.5 861.0 863.3 859.3 859.6 856.6 850.6 854.4 859.8 863.8 865.4 865.0 865.4 DAY 7 21 11 23 8 10 21 31 18 30 8 28 MIN. QFE PRESSURE IN HPA 852.6 855.6 852.1 853.8 852.1 845.4 845.6 848.0 851.7 858.3 856.9 856.4 845.4 DAY 17 1 30 10 30 29 10 1 2 1 24 11 MEAN QNH PRESSURE IN HPA 1016.1 1015.0 1013.0 1012.4 1012.2 1007.6 1003.3 1006.4 1012.3 1017.1 1017.8 1017.3 1012.5 MAX. QNH PRESSURE IN HPA 1020.9 1018.0 1020.6 1016.0 1016.4 1013.0 1006.1 1010.4 1016.6 1021.2 1023.0 1022.6 1023.0 DAY 7 21 11 23 8 10 21 31 18 30 8 28 MIN. QNH PRESSURE IN HPA 1008.4 1011.8 1007.8 1009.7 1007.8 1000.1 1000.3 1003.1 1007.3 1014.9 1013.3 1012.7 1000.1 DAY 17 1 30 10 30 29 10 1 2 1 24 11 MEAN QFF PRESSURE IN HPA 1015.8 1012.6 1008.7 1005.2 1002.1 995.2 989.0 993.5 1001.5 1009.7 1013.9 1015.7 1005.3 MAX. QFF PRESSURE IN HPA 1021.4 1017.0 1016.9 1011.1 1008.9 1002.6 993.1 999.4 1006.5 1016.4 1020.2 1025.4 1025.4 DAY 7 8 1 14 7 4 20 31 18 30 30 29 MIN. QFF PRESSURE IN HPA 1004.2 1006.9 1002.2 1000.4 996.1 986.1 984.7 988.5 995.8 1004.9 1007.7 1009.1 984.7 DAY 17 28 30 10 30 27 16 1 2 1 13 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 859.9 859.5 857.6 857.5 857.2 852.9 849.6 852.4 857.3 861.3 861.6 860.8 857.3 MAX. QFE PRESSURE IN HPA 864.2 862.8 864.6 860.6 860.8 857.5 852.1 855.6 860.9 864.6 865.4 866.0 866.0 DAY 7 21 11 23 7 4 21 30 17 30 8 28 MIN. QFE PRESSURE IN HPA 852.1 857.5 852.9 855.3 853.5 846.8 847.5 849.8 853.0 859.3 857.3 856.5 846.8 DAY 17 4 17 10 30 29 10 5 2 22 24 10 MEAN QNH PRESSURE IN HPA 1016.7 1016.2 1014.1 1014.0 1013.6 1008.8 1005.0 1008.2 1013.8 1018.3 1018.6 1017.8 1013.8 MAX. QNH PRESSURE IN HPA 1021.7 1020.1 1022.1 1017.5 1017.8 1014.0 1007.8 1011.8 1017.9 1022.1 1023.0 1023.7 1023.7 DAY 7 21 11 23 7 4 21 30 17 30 8 28 MIN. QNH PRESSURE IN HPA 1007.8 1014.0 1008.7 1011.5 1009.4 1001.7 1002.5 1005.2 1008.8 1016.0 1013.8 1012.8 1001.7 DAY 17 4 17 10 30 29 10 5 2 22 24 10 MEAN QFF PRESSURE IN HPA 1015.2 1012.6 1008.9 1005.7 1002.6 995.3 989.8 994.2 1001.4 1009.3 1013.8 1015.2 1005.3 MAX. QFF PRESSURE IN HPA 1021.1 1017.4 1018.0 1012.5 1010.6 1003.7 993.7 999.8 1006.6 1015.0 1019.3 1024.4 1024.4 DAY 19 8 1 14 7 4 21 30 17 30 30 28 MIN. QFF PRESSURE IN HPA 1003.1 1005.8 1003.3 1002.0 996.9 988.0 986.7 990.5 995.2 1004.9 1007.7 1008.4 986.7 DAY 17 27 30 10 30 29 16 1 2 1 13 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 859.4 859.3 857.1 857.1 856.7 852.6 849.5 852.1 857.0 861.0 861.3 860.4 856.9 MAX. QFE PRESSURE IN HPA 864.2 862.3 863.8 860.1 860.4 857.5 851.8 855.4 860.9 864.1 865.3 866.0 866.0 DAY 7 21 11 23 14 4 21 31 17 30 7 28 MIN. QFE PRESSURE IN HPA 849.6 857.0 853.1 854.8 853.5 846.4 846.6 849.8 852.1 859.2 856.8 855.8 846.4 DAY 17 14 17 10 30 29 10 4 2 15 24 10 MEAN QNH PRESSURE IN HPA 1016.1 1016.0 1013.5 1013.6 1013.0 1008.3 1004.8 1007.7 1013.4 1018.0 1018.3 1017.3 1013.3 MAX. QNH PRESSURE IN HPA 1021.7 1019.5 1021.2 1017.0 1017.3 1014.0 1007.5 1011.6 1017.9 1021.5 1022.9 1023.7 1023.7 DAY 7 21 11 23 14 4 21 31 17 30 7 28 MIN. QNH PRESSURE IN HPA 1004.9 1013.4 1008.9 1010.9 1009.4 1001.3 1001.5 1005.2 1007.8 1015.9 1013.2 1012.0 1001.3 DAY 17 14 17 10 30 29 10 4 2 15 24 10 MEAN QFF PRESSURE IN HPA 1014.0 1012.0 1008.0 1005.0 1001.8 994.7 989.4 993.6 1001.0 1008.8 1013.2 1014.4 1004.7 MAX. QFF PRESSURE IN HPA 1020.1 1016.8 1016.9 1011.2 1008.6 1003.6 992.8 999.1 1006.3 1014.5 1018.5 1024.2 1024.2 DAY 19 8 1 14 7 4 21 30 17 30 29 28 MIN. QFF PRESSURE IN HPA 999.9 1005.4 1003.0 1000.5 996.6 987.3 986.3 990.5 994.4 1004.3 1006.8 1007.5 986.3 DAY 17 27 14 10 29 27 16 1 2 3 13 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.6 9.9 15.9 22.0 26.4 28.5 31.3 29.8 25.9 20.7 15.1 13.8 20.7 MINIMUN AIR TEMPERATURE (C) 3.1 3.6 9.8 13.6 17.3 19.9 22.7 21.1 16.9 11.4 6.0 4.7 12.5 DAYS WITH MINIMUM TEMP. >=21 0 0 1 1 5 11 26 14 2 1 0 0 61 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 10 7 0 0 0 0 0 0 0 0 0 0 17 TEMPERATURE RECORDS LOWEST(C) -3.2 -2.2 2.0 5.0 10.4 14.5 18.6 15.0 12.0 4.0 2.0 1.8 -3.2 DAY 17 25 6 9 9 13 18 31 24 16 29 18 MAXIMUM AIR TEMPERATURE (C) 14.0 16.1 21.5 28.9 34.0 35.6 38.6 37.1 34.1 29.4 23.9 23.3 28.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 3 18 28 30 31 31 30 9 0 0 180 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.8 21.4 30.4 32.6 38.4 39.0 43.4 39.2 37.2 35.0 26.6 27.0 43.4 DAY 28 8 29 29 25 29 8 2 8 1 10 14 DIF. BETWEEN (MAX.-MIN.) (C) 10.9 12.5 11.7 15.3 16.7 15.7 15.9 16.0 17.2 18.0 17.9 18.6 15.5 MEAN DAILY TEMP. (MDT) (C) 8.6 9.8 15.7 21.2 25.6 27.8 30.7 29.1 25.5 20.4 15.0 14.0 20.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 6.1 39.7 145.0 203.3 299.6 250.7 136.2 40.7 0.0 0.0 1121.4 HEATING DEG. DAYS(BASE 18 0C) 292.9 228.2 100.3 9.8 0.0 0.0 0.0 0.0 0.0 8.9 90.9 124.8 855.7 DEWPOINT (MEAN C) 0.5 -0.3 2.3 2.0 1.5 1.8 4.2 3.2 1.9 -2.6 -5.9 -5.2 0.3 MIXING RATIO (G/KG) 4.95 4.59 5.54 5.35 5.09 5.29 6.34 6.08 5.48 3.96 2.96 3.31 4.91 VAPOUR PRESSURE (HPA) 6.78 6.28 7.57 7.30 6.95 7.19 8.56 8.24 7.47 5.43 4.08 4.56 6.70 SATURATION DEF. (HPA) 4.84 6.56 11.67 20.66 29.41 33.20 38.84 35.20 27.56 20.84 14.30 12.46 21.30 RELATIVE HUMIDITY (MEAN %) 60 53 45 30 22 20 20 21 23 23 25 30 31 RELATIVE HUMIDITY (MAX. %) 82 79 68 49 33 32 30 31 35 35 38 45 46 RELATIVE HUMIDITY (MIN. %) 41 30 28 17 12 11 11 11 13 12 14 17 18 RELATIVE HUMIDITY (MEAN% 03UTC) 75 75 65 43 30 25 28 28 31 32 35 43 43 RELATIVE HUMIDITY (MEAN% 09UTC) 46 37 32 19 14 12 13 13 14 13 15 20 21 RELATIVE HUMIDITY (MEAN% 15UTC) 55 44 39 21 18 15 14 16 20 19 21 25 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 104.7 17.2 40.5 3.3 0.0 3.0 0.0 10.0 2.3 0.0 0.0 0.0 181.0 DAYS WITH PRECIPITATION >=10 4 1 1 0 0 0 0 1 0 0 0 0 7 DAYS WITH PRECIPITATION >= 5 5 1 1 0 0 0 0 1 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 6 3 2 2 0 1 0 1 1 0 0 0 16 DAYS WITH PRECIPITATION 7 4 7 3 0 1 0 1 3 0 0 0 26 GREATEST DAILY PRECIPITATION 40.0 11.1 36.0 2.0 0.0 3.0 0.0 10.0 2.0 0.0 0.0 0.0 40.0 DAY 30 13 2 24 ** 15 ** 24 10 ** ** ** DAY WITH THUNDER STORM 0 0 0 2 1 3 0 2 2 1 0 0 11 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 4 5 7 3 8 10 5 3 2 1 1 50 WIND DIRECTION (PREVAILING) 225 225 270 360 90 90 360 360 90 360 360 360 360 PREVAILING WIND SPEED(KNOTS) 14.8 15.0 12.6 11.6 7.3 8.0 10.8 11.2 6.5 8.3 8.3 8.1 9.6 PREVAILING WIND PERCENT 17.3 18.3 18.5 23.8 24.2 33.3 27.4 26.2 24.6 27.4 32.5 27.0 20.2 CALMS PERCENT OF WIND 33.5 31.3 23.0 28.8 21.4 22.1 27.8 27.8 29.6 30.2 29.2 34.3 28.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 227 241 281 324 5 53 37 31 39 30 18 20 359 VECTOR WIND MAGNITUDE(KNOTS) 4.0 3.8 4.3 4.5 2.2 4.2 4.2 3.6 2.5 2.8 3.0 2.5 1.7 WIND STEADINESES (MEAN %) 52.6 48.1 50.0 57.7 31.4 57.5 60.0 51.4 43.1 50.0 55.6 48.1 24.6 WIND SPEED (MEAN KNOTS) 7.6 7.9 8.6 7.8 7.0 7.3 7.0 7.0 5.8 5.6 5.4 5.2 6.9 FASTEST WIND DIRECTION 170 150 260 240 60 10 30 170 30 20 220 260 240 FASTEST WIND SPEED (KNOTS) 35 39 39 43 25 29 27 25 31 19 16 25 43 DAY 29 13 19 6 17 10 20 24 10 2 5 18 DAYS WITH SKY CLEAR (0-2)/8 17 19 15 18 28 27 26 26 27 29 29 26 287 DAYS WITH P.CLOUDY (3-6)/8 5 4 7 9 2 3 5 5 3 2 1 5 51 DAYS WITH CLOUDY (7-8)/8 9 5 9 3 1 0 0 0 0 0 0 0 27 DAYS WITH VISIBILITY =< 2 KM 1 1 0 0 0 0 0 0 1 0 0 0 3 DURATION OF SUNSHINE HOURS 212.4 239.1 245.0 300.8 352.2 363.0 359.0 339.8 302.9 303.1 278.8 275.8 3571.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.3 858.9 858.6 857.5 856.3 853.4 850.1 852.8 856.1 859.7 861.9 863.2 857.3 MAX. QFE PRESSURE IN HPA 866.5 866.3 863.4 863.6 861.3 858.7 854.2 856.7 860.9 864.5 866.2 868.1 868.1 DAY-HOUR 4- 6 3- 6 27- 6 1- 6 8- 3 5- 6 22- 3 28- 6 25- 6 25- 6 30- 6 9- 6 MIN. QFE PRESSURE IN HPA 849.7 847.8 852.5 852.1 849.8 847.1 844.1 848.5 851.7 854.5 857.9 857.3 844.1 DAY-HOUR 13-12 13-12 15-12 30-12 30-15 30-12 8-12 13-12 3-12 15-12 13-12 21-12 MEAN QNH PRESSURE IN HPA 1016.1 1015.5 1015.3 1013.9 1012.6 1009.3 1005.5 1008.6 1012.4 1016.5 1019.1 1020.6 1013.8 MAX. QNH PRESSURE IN HPA 1024.3 1024.1 1020.7 1021.0 1018.3 1015.4 1010.2 1013.1 1017.9 1022.0 1024.0 1026.1 1026.1 DAY-HOUR 4- 6 3- 6 27- 6 1- 6 8- 3 5- 6 22- 3 28- 6 25- 6 25- 6 30- 6 9- 6 MIN. QNH PRESSURE IN HPA 1005.0 1002.9 1008.3 1007.8 1005.2 1002.1 998.6 1003.7 1007.3 1010.5 1014.4 1013.8 998.6 DAY-HOUR 13-12 13-12 15-12 30-12 30-15 30-12 8-12 13-12 3-12 15-12 13-12 21-12 MEAN QFF PRESSURE IN HPA 1014.1 1012.8 1009.2 1004.4 1000.8 996.3 990.9 994.9 1000.7 1007.9 1013.6 1015.9 1005.1 MAX. QFF PRESSURE IN HPA 1022.0 1021.4 1016.6 1013.7 1010.0 1003.5 997.3 1000.8 1007.5 1016.3 1020.3 1023.8 1023.8 DAY-HOUR 4- 3 3- 6 6- 6 12- 3 8- 3 16- 0 22- 3 25- 3 26- 3 25- 3 30-15 10- 3 MIN. QFF PRESSURE IN HPA 1001.0 997.6 1002.2 996.1 991.4 987.6 982.2 990.0 995.2 998.2 1008.3 1006.1 982.2 DAY-HOUR 13-12 13-12 15-12 30-12 30-18 30-12 8-12 5-12 7-12 1-12 14-12 19-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 858.8 858.3 858.0 857.1 856.0 853.6 850.2 852.9 856.0 859.4 861.6 863.0 857.1 MAX. QFE PRESSURE IN HPA 864.3 863.7 861.9 862.3 860.2 857.8 853.1 855.3 859.3 862.8 863.8 866.8 866.8 DAY 4 4 27 12 8 5 22 24 26 26 21 10 MIN. QFE PRESSURE IN HPA 851.8 849.5 853.0 853.0 851.5 849.1 845.8 849.8 853.4 855.7 858.6 858.9 845.8 DAY 14 16 3 30 31 30 8 13 3 16 17 21 MEAN QNH PRESSURE IN HPA 1015.4 1014.9 1014.6 1013.6 1012.3 1009.5 1005.6 1008.7 1012.3 1016.2 1018.7 1020.3 1013.5 MAX. QNH PRESSURE IN HPA 1021.8 1021.1 1019.0 1019.5 1017.1 1014.3 1008.9 1011.5 1016.0 1020.1 1021.2 1024.6 1024.6 DAY 4 4 27 12 8 5 22 24 26 26 21 10 MIN. QNH PRESSURE IN HPA 1007.5 1004.8 1008.8 1008.8 1007.1 1004.4 1000.6 1005.2 1009.3 1011.9 1015.2 1015.6 1000.6 DAY 14 16 3 30 31 30 8 13 3 16 17 21 MEAN QFF PRESSURE IN HPA 1013.3 1011.9 1008.4 1004.1 1000.7 996.7 991.2 995.1 1000.9 1007.6 1013.2 1015.2 1004.9 MAX. QFF PRESSURE IN HPA 1020.1 1018.5 1014.3 1012.9 1008.2 1003.5 996.3 1000.6 1006.0 1013.1 1017.0 1021.1 1021.1 DAY 4 4 6 12 8 16 22 25 26 26 30 10 MIN. QFF PRESSURE IN HPA 1004.6 1001.8 1003.1 996.9 992.3 989.8 984.4 991.8 997.3 1000.7 1009.4 1006.5 984.4 DAY 14 16 16 30 31 30 8 6 8 3 14 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.6 859.3 859.0 858.2 857.3 854.4 851.2 853.9 857.0 860.5 862.7 863.8 858.1 MAX. QFE PRESSURE IN HPA 865.5 864.5 862.9 863.0 861.3 858.6 854.2 856.3 860.2 864.0 864.9 867.6 867.6 DAY 4 3 27 12 8 5 22 28 25 29 21 10 MIN. QFE PRESSURE IN HPA 853.0 850.7 854.0 853.6 853.2 849.8 846.7 850.5 854.4 856.3 859.3 859.3 846.7 DAY 14 16 3 30 31 30 8 13 7 16 17 21 MEAN QNH PRESSURE IN HPA 1016.4 1016.0 1015.7 1014.8 1013.8 1010.4 1006.7 1009.9 1013.4 1017.4 1019.9 1021.2 1014.6 MAX. QNH PRESSURE IN HPA 1023.1 1022.0 1020.2 1020.3 1018.3 1015.2 1010.2 1012.6 1017.1 1021.4 1022.5 1025.6 1025.6 DAY 4 3 27 12 8 5 22 28 25 29 21 10 MIN. QNH PRESSURE IN HPA 1008.8 1006.2 1010.0 1009.5 1009.1 1005.2 1001.6 1006.0 1010.4 1012.6 1016.0 1016.0 1001.6 DAY 14 16 3 30 31 30 8 13 7 16 17 21 MEAN QFF PRESSURE IN HPA 1015.3 1014.4 1010.6 1006.0 1002.6 997.7 992.6 996.6 1002.7 1010.0 1015.9 1018.2 1006.9 MAX. QFF PRESSURE IN HPA 1022.0 1020.9 1016.2 1013.7 1010.0 1003.3 997.3 1000.8 1007.5 1016.3 1020.0 1023.8 1023.8 DAY 4 6 6 12 8 16 22 25 26 25 30 10 MIN. QFF PRESSURE IN HPA 1007.4 1003.1 1005.0 997.7 995.5 990.1 985.2 992.7 998.7 1002.0 1011.2 1009.9 985.2 DAY 14 13 31 30 31 30 8 13 7 3 14 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.1 860.4 860.0 859.1 857.8 854.4 851.1 854.1 857.6 861.1 863.5 864.9 858.8 MAX. QFE PRESSURE IN HPA 866.5 866.3 863.4 863.6 861.1 858.7 854.2 856.7 860.9 864.5 866.2 868.1 868.1 DAY 4 3 27 1 3 5 29 28 25 25 30 9 MIN. QFE PRESSURE IN HPA 855.2 851.6 855.2 854.5 853.2 849.3 846.4 850.5 854.9 857.3 860.3 860.2 846.4 DAY 13 13 10 30 30 30 8 13 3 3 17 21 MEAN QNH PRESSURE IN HPA 1018.1 1017.3 1016.8 1015.8 1014.3 1010.5 1006.7 1010.1 1014.1 1018.2 1020.8 1022.5 1015.4 MAX. QNH PRESSURE IN HPA 1024.3 1024.1 1020.7 1021.0 1018.1 1015.4 1010.2 1013.1 1017.9 1022.0 1024.0 1026.1 1026.1 DAY 4 3 27 1 3 5 29 28 25 25 30 9 MIN. QNH PRESSURE IN HPA 1011.4 1007.2 1011.4 1010.5 1009.1 1004.6 1001.3 1006.0 1011.0 1013.8 1017.2 1017.1 1001.3 DAY 13 13 10 30 30 30 8 13 3 3 17 21 MEAN QFF PRESSURE IN HPA 1016.0 1014.4 1010.5 1005.7 1001.9 997.2 991.8 996.0 1001.8 1008.8 1014.7 1017.5 1006.4 MAX. QFF PRESSURE IN HPA 1021.9 1021.4 1016.6 1013.5 1009.2 1002.5 996.2 999.9 1005.8 1014.2 1018.9 1022.4 1022.4 DAY 23 3 6 12 7 16 27 28 25 25 24 7 MIN. QFF PRESSURE IN HPA 1009.4 1001.9 1005.9 998.1 995.6 989.4 984.2 991.8 997.0 1000.1 1011.3 1010.3 984.2 DAY 13 13 31 30 30 30 8 13 7 3 17 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.2 858.7 858.7 857.7 856.4 853.2 849.8 852.6 855.7 859.2 861.4 862.7 857.1 MAX. QFE PRESSURE IN HPA 864.6 864.8 862.1 862.1 859.8 857.7 853.1 855.2 859.2 862.5 864.3 866.0 866.0 DAY 4 3 27 1 3 5 30 28 25 25 30 9 MIN. QFE PRESSURE IN HPA 851.7 850.0 854.1 853.2 851.8 848.3 845.6 849.3 852.9 855.5 858.7 857.9 845.6 DAY 13 13 15 30 30 30 8 13 3 3 17 21 MEAN QNH PRESSURE IN HPA 1015.9 1015.4 1015.4 1014.2 1012.7 1009.1 1005.2 1008.4 1012.0 1015.9 1018.5 1019.9 1013.5 MAX. QNH PRESSURE IN HPA 1022.1 1022.3 1019.3 1019.3 1016.6 1014.2 1008.9 1011.4 1015.9 1019.7 1021.8 1023.7 1023.7 DAY 4 3 27 1 3 5 30 28 25 25 30 9 MIN. QNH PRESSURE IN HPA 1007.3 1005.4 1010.1 1009.1 1007.5 1003.4 1000.3 1004.6 1008.7 1011.7 1015.4 1014.4 1000.3 DAY 13 13 15 30 30 30 8 13 3 3 17 21 MEAN QFF PRESSURE IN HPA 1013.5 1012.1 1008.9 1004.3 1000.7 995.8 990.3 994.2 999.8 1006.5 1012.3 1014.3 1004.4 MAX. QFF PRESSURE IN HPA 1019.1 1019.1 1014.8 1011.9 1007.5 1000.4 994.9 998.0 1005.0 1011.7 1017.4 1019.5 1019.5 DAY 4 3 6 12 7 5 22 28 25 25 30 9 MIN. QFF PRESSURE IN HPA 1004.3 999.7 1003.4 996.6 993.7 988.9 983.0 991.5 995.8 999.3 1009.2 1007.5 983.0 DAY 13 13 15 30 31 30 8 13 7 3 14 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.3 857.5 857.5 856.2 855.1 852.0 848.7 851.4 854.5 858.2 860.6 861.9 856.0 MAX. QFE PRESSURE IN HPA 863.7 862.8 860.4 861.2 858.8 856.9 851.6 854.0 858.0 861.2 863.4 865.6 865.6 DAY 4 3 27 1 7 15 29 24 25 25 30 9 MIN. QFE PRESSURE IN HPA 849.7 847.8 852.5 852.1 850.4 847.1 844.1 848.5 851.7 854.5 857.9 857.3 844.1 DAY 13 13 15 30 30 30 8 13 3 15 13 21 MEAN QNH PRESSURE IN HPA 1014.9 1014.0 1014.0 1012.5 1011.2 1007.6 1003.9 1006.9 1010.5 1014.8 1017.5 1019.0 1012.2 MAX. QNH PRESSURE IN HPA 1021.1 1020.1 1017.3 1018.2 1015.5 1013.3 1007.2 1010.0 1014.6 1018.2 1020.7 1023.3 1023.3 DAY 4 3 27 1 7 15 29 24 25 25 30 9 MIN. QNH PRESSURE IN HPA 1005.0 1002.9 1008.3 1007.8 1005.8 1002.1 998.6 1003.7 1007.3 1010.5 1014.4 1013.8 998.6 DAY 13 13 15 30 30 30 8 13 3 15 13 21 MEAN QFF PRESSURE IN HPA 1012.7 1011.0 1007.7 1003.1 999.6 994.9 989.5 993.4 999.1 1006.2 1012.0 1013.9 1003.6 MAX. QFF PRESSURE IN HPA 1018.2 1017.1 1014.0 1010.5 1006.8 1002.8 994.2 998.1 1004.3 1011.2 1016.7 1019.6 1019.6 DAY 4 3 6 11 7 15 22 24 25 26 30 9 MIN. QFF PRESSURE IN HPA 1001.0 997.6 1002.2 996.1 992.9 987.6 982.2 990.0 995.2 998.2 1008.3 1006.1 982.2 DAY 13 13 15 30 31 30 8 5 7 1 14 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.0 858.5 858.2 856.6 855.4 852.3 849.0 851.8 855.3 859.4 861.7 863.0 856.7 MAX. QFE PRESSURE IN HPA 864.3 864.0 861.5 861.7 860.0 857.3 851.7 853.7 858.4 862.6 864.4 867.2 867.2 DAY 4 3 27 1 7 15 21 19 25 25 20 9 MIN. QFE PRESSURE IN HPA 851.2 849.8 852.9 852.8 849.8 847.4 844.3 849.3 852.5 855.6 859.1 858.5 844.3 DAY 13 13 15 30 30 30 8 12 3 3 13 21 MEAN QNH PRESSURE IN HPA 1015.7 1015.2 1014.8 1012.9 1011.5 1008.0 1004.3 1007.4 1011.4 1016.1 1018.8 1020.3 1013.0 MAX. QNH PRESSURE IN HPA 1021.8 1021.4 1018.6 1018.8 1016.8 1013.8 1007.3 1009.6 1015.0 1019.8 1021.9 1025.1 1025.1 DAY 4 3 27 1 7 15 21 19 25 25 20 9 MIN. QNH PRESSURE IN HPA 1006.8 1005.2 1008.7 1008.6 1005.2 1002.4 998.9 1004.6 1008.3 1011.8 1015.8 1015.1 998.9 DAY 13 13 15 30 30 30 8 12 3 3 13 21 MEAN QFF PRESSURE IN HPA 1014.6 1013.5 1009.5 1004.1 1000.2 995.3 990.3 994.3 1000.7 1008.7 1014.8 1017.2 1005.3 MAX. QFF PRESSURE IN HPA 1019.8 1019.7 1015.2 1011.7 1008.8 1002.8 994.6 997.7 1005.2 1014.4 1020.3 1022.2 1022.2 DAY 23 5 6 11 7 15 21 28 25 25 30 8 MIN. QFF PRESSURE IN HPA 1004.5 1001.2 1004.3 996.9 992.0 987.8 982.7 991.0 996.2 999.5 1011.0 1010.4 982.7 DAY 13 13 15 30 30 30 8 5 7 1 1 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 859.6 859.2 859.1 857.7 856.5 853.8 850.4 853.2 856.5 860.2 862.3 863.6 857.7 MAX. QFE PRESSURE IN HPA 865.1 864.7 862.6 863.0 861.2 857.8 853.3 855.3 859.4 863.2 865.0 867.7 867.7 DAY 4 3 26 11 7 4 21 24 25 25 30 9 MIN. QFE PRESSURE IN HPA 851.0 851.1 854.1 854.0 850.8 849.3 846.1 850.1 853.9 856.2 859.7 859.1 846.1 DAY 13 15 2 30 30 30 8 12 2 15 17 21 MEAN QNH PRESSURE IN HPA 1016.4 1016.0 1015.8 1014.2 1012.9 1009.8 1005.9 1009.0 1012.8 1017.1 1019.5 1020.9 1014.2 MAX. QNH PRESSURE IN HPA 1022.7 1022.2 1019.8 1020.3 1018.2 1014.3 1009.2 1011.5 1016.2 1020.5 1022.6 1025.7 1025.7 DAY 4 3 26 11 7 4 21 24 25 25 30 9 MIN. QNH PRESSURE IN HPA 1006.5 1006.7 1010.1 1010.0 1006.3 1004.6 1000.9 1005.5 1009.9 1012.5 1016.5 1015.8 1000.9 DAY 13 15 2 30 30 30 8 12 2 15 17 21 MEAN QFF PRESSURE IN HPA 1014.2 1013.1 1009.3 1004.2 1000.5 996.4 991.1 994.9 1000.6 1007.9 1013.4 1016.0 1005.1 MAX. QFF PRESSURE IN HPA 1020.4 1019.9 1015.0 1013.3 1008.9 1002.6 995.9 998.1 1004.4 1012.9 1017.9 1021.7 1021.7 DAY 23 3 6 11 7 15 21 27 25 25 24 9 MIN. QFF PRESSURE IN HPA 1003.2 1003.8 1004.8 997.7 991.4 989.3 984.3 991.5 996.4 999.6 1009.6 1008.8 984.3 DAY 13 13 15 30 30 30 8 12 3 2 1 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 859.1 859.0 858.7 857.3 856.1 853.5 850.2 853.0 856.2 859.8 861.9 863.1 857.3 MAX. QFE PRESSURE IN HPA 864.8 864.2 862.6 862.7 860.0 858.5 852.9 855.3 859.2 862.8 864.3 866.8 866.8 DAY 4 3 26 11 7 4 22 28 25 25 20 9 MIN. QFE PRESSURE IN HPA 850.8 850.4 853.8 853.4 851.1 849.0 845.8 849.8 853.4 856.0 859.0 859.0 845.8 DAY 13 15 2 30 30 29 7 12 2 15 16 21 MEAN QNH PRESSURE IN HPA 1015.8 1015.7 1015.4 1013.7 1012.4 1009.4 1005.6 1008.8 1012.5 1016.7 1019.0 1020.4 1013.8 MAX. QNH PRESSURE IN HPA 1022.3 1021.7 1019.8 1019.9 1016.8 1015.1 1008.7 1011.5 1015.9 1020.1 1021.8 1024.6 1024.6 DAY 4 3 26 11 7 4 22 28 25 25 20 9 MIN. QNH PRESSURE IN HPA 1006.3 1005.8 1009.7 1009.3 1006.7 1004.2 1000.6 1005.2 1009.3 1012.3 1015.7 1015.7 1000.6 DAY 13 15 2 30 30 29 7 12 2 15 16 21 MEAN QFF PRESSURE IN HPA 1013.3 1012.4 1008.6 1003.8 1000.3 996.1 990.7 994.6 1000.3 1007.4 1012.9 1014.9 1004.6 MAX. QFF PRESSURE IN HPA 1019.4 1018.9 1014.3 1012.7 1007.6 1001.1 994.8 998.0 1004.8 1012.0 1016.7 1020.4 1020.4 DAY 4 3 5 11 7 15 27 31 25 30 29 9 MIN. QFF PRESSURE IN HPA 1002.4 1002.7 1003.0 997.4 991.6 989.4 983.0 991.1 996.5 1000.1 1009.4 1007.9 983.0 DAY 13 15 15 29 30 30 7 4 2 2 13 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.3 12.1 14.9 22.4 26.6 31.3 32.9 32.1 28.5 23.8 18.2 12.7 22.0 MINIMUN AIR TEMPERATURE (C) 1.8 6.9 7.4 13.1 18.2 21.9 23.1 19.6 17.0 12.0 8.5 1.5 12.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 5 19 24 7 1 0 0 0 57 DAYS WITH MINIMUM TEMP. <=-4 4 0 0 0 0 0 0 0 0 0 0 0 4 DAYS WITH FREEZING MIN.<= 0 8 2 0 0 0 0 0 0 0 0 0 11 21 TEMPERATURE RECORDS LOWEST(C) -10.0 -2.6 0.4 6.4 13.0 18.6 18.4 14.0 13.8 9.0 4.6 -2.6 -10.0 DAY 5 2 8 12 28 23 20 1 12 6 20 7 MAXIMUM AIR TEMPERATURE (C) 15.4 17.3 21.3 30.1 33.8 38.1 37.8 37.1 34.3 29.3 23.4 19.5 28.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 17 31 30 31 31 28 12 0 0 181 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.2 23.4 30.0 34.0 37.6 41.5 41.4 38.4 38.0 31.6 28.4 23.5 41.5 DAY 1 28 27 29 15 30 1 5 1 17 1 27 DIF. BETWEEN (MAX.-MIN.) (C) 13.6 10.4 13.9 17.0 15.6 16.2 14.7 17.5 17.3 17.3 14.9 18.0 15.5 MEAN DAILY TEMP. (MDT) (C) 8.6 12.1 14.4 21.6 26.0 30.0 30.4 28.3 25.6 20.7 15.9 10.5 20.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 49.0 154.9 269.4 292.6 227.1 139.3 9.1 0.0 0.0 1141.5 HEATING DEG. DAYS(BASE 18 0C) 290.5 165.7 126.3 6.7 0.0 0.0 0.0 0.0 0.0 0.0 69.6 233.3 892.0 DEWPOINT (MEAN C) -4.7 3.7 -1.9 -1.6 0.3 1.6 6.6 -0.3 1.9 -1.1 1.6 -8.1 -0.2 MIXING RATIO (G/KG) 3.54 6.13 4.11 4.15 4.80 5.21 7.99 4.56 5.68 4.25 5.21 2.61 4.85 VAPOUR PRESSURE (HPA) 4.85 8.39 5.62 5.67 6.54 7.08 10.76 6.20 7.72 5.84 7.14 3.61 6.62 SATURATION DEF. (HPA) 6.89 6.29 12.64 23.11 29.67 40.29 40.57 42.96 32.88 24.85 14.67 12.04 23.90 RELATIVE HUMIDITY (MEAN %) 45 60 38 22 20 16 23 14 22 21 36 26 29 RELATIVE HUMIDITY (MAX. %) 67 83 64 37 32 27 35 23 34 34 55 43 45 RELATIVE HUMIDITY (MIN. %) 26 39 21 12 12 10 15 9 13 14 26 16 18 RELATIVE HUMIDITY (MEAN% 03UTC) 60 79 59 33 26 23 34 23 33 34 54 43 42 RELATIVE HUMIDITY (MEAN% 09UTC) 31 44 24 14 12 11 17 10 15 15 28 19 20 RELATIVE HUMIDITY (MEAN% 15UTC) 38 54 28 16 15 12 23 12 19 21 33 25 25 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 49.7 52.7 25.5 0.0 0.3 0.0 14.4 0.0 4.0 0.0 0.9 0.0 147.5 DAYS WITH PRECIPITATION >=10 2 1 1 0 0 0 1 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 2 5 2 0 0 0 1 0 0 0 0 0 10 DAYS WITH PRECIPITATION >= 1 3 9 3 0 0 0 2 0 2 0 0 0 19 DAYS WITH PRECIPITATION 5 12 3 1 4 0 3 0 2 0 2 0 32 GREATEST DAILY PRECIPITATION 35.3 20.0 18.0 0.0 0.1 0.0 10.0 0.0 3.0 0.0 0.9 0.0 35.3 DAY 19 14 3 ** 16 ** 14 ** 29 ** 25 ** DAY WITH THUNDER STORM 0 3 0 0 2 0 2 0 1 0 1 0 9 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 6 2 5 10 12 11 9 6 4 0 1 0 66 WIND DIRECTION (PREVAILING) 360 270 360 360 90 90 90 360 90 90 270 360 360 PREVAILING WIND SPEED(KNOTS) 9.8 13.6 9.7 9.5 9.7 9.4 11.5 12.7 10.0 11.0 11.5 8.0 9.9 PREVAILING WIND PERCENT 28.6 22.3 26.6 22.9 31.0 29.1 30.3 43.2 16.7 12.3 14.0 22.6 18.9 CALMS PERCENT OF WIND 27.0 29.5 18.1 30.8 21.8 32.9 36.8 23.2 48.0 57.4 46.0 38.7 32.4 NO. OF WIND OBSERVATION 248 224 248 240 248 213 155 155 150 155 150 155 2341 VECTOR WIND DIRECTION (MEAN) 326 283 323 333 65 85 73 2 63 59 302 20 5 VECTOR WIND MAGNITUDE(KNOTS) 3.2 3.3 3.6 3.4 3.6 2.6 4.0 7.2 1.7 1.2 2.9 1.6 2.0 WIND STEADINESES (MEAN %) 45.1 45.8 46.2 49.3 46.8 40.6 54.8 78.3 34.7 29.3 55.8 31.4 30.3 WIND SPEED (MEAN KNOTS) 7.1 7.2 7.8 6.9 7.7 6.4 7.3 9.2 4.9 4.1 5.2 5.1 6.6 FASTEST WIND DIRECTION 340 310 240 240 90 90 20 360 20 80 340 340 90 FASTEST WIND SPEED (KNOTS) 23 23 23 23 35 23 27 25 23 17 19 19 35 DAY 22 4 2 10 29 1 4 13 3 11 12 6 DAYS WITH SKY CLEAR (0-2)/8 18 10 18 27 28 29 25 28 29 31 23 26 292 DAYS WITH P.CLOUDY (3-6)/8 11 11 7 3 3 1 6 3 1 0 4 4 54 DAYS WITH CLOUDY (7-8)/8 2 7 6 0 0 0 0 0 0 0 3 1 19 DAYS WITH VISIBILITY =< 2 KM 1 0 1 1 1 0 1 1 0 0 0 0 6 DURATION OF SUNSHINE HOURS 236.8 188.4 269.6 323.9 355.1 343.2 341.5 354.4 316.7 310.5 260.1 284.4 3584.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.3 860.2 856.8 857.2 854.4 852.8 849.9 851.6 854.8 859.6 860.9 862.7 856.7 MAX. QFE PRESSURE IN HPA 864.5 866.7 861.9 861.6 859.2 858.8 853.4 857.2 862.1 862.8 866.1 867.0 867.0 DAY-HOUR 13- 6 12- 6 31- 6 5- 6 13- 3 1- 6 8- 3 19- 6 30- 6 27- 6 15- 6 11- 6 MIN. QFE PRESSURE IN HPA 853.5 855.6 851.7 851.9 847.8 846.6 845.9 847.3 850.0 855.8 856.5 857.8 845.9 DAY-HOUR 19-12 6-12 6- 0 10-12 21-12 23-12 12-12 6-12 16-12 3-12 4-12 15-12 MEAN QNH PRESSURE IN HPA 1016.0 1017.1 1013.2 1013.7 1010.4 1008.6 1005.2 1007.3 1010.8 1016.3 1017.9 1019.9 1013.0 MAX. QNH PRESSURE IN HPA 1022.0 1024.5 1019.0 1018.7 1015.9 1015.5 1009.3 1013.6 1019.3 1020.1 1023.8 1024.9 1024.9 DAY-HOUR 13- 6 12- 6 31- 6 5- 6 13- 3 1- 6 8- 3 19- 6 30- 6 27- 6 15- 6 11- 6 MIN. QNH PRESSURE IN HPA 1009.4 1011.8 1007.3 1007.6 1002.9 1001.5 1000.7 1002.3 1005.4 1012.0 1012.8 1014.3 1000.7 DAY-HOUR 19-12 6-12 6- 0 10-12 21-12 23-12 12-12 6-12 16-12 3-12 4-12 15-12 MEAN QFF PRESSURE IN HPA 1014.4 1013.0 1007.6 1004.1 998.4 995.1 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1022.7 1021.0 1016.5 1011.8 1005.8 1001.9 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 5- 3 12- 6 20- 6 1- 3 27- 3 1- 6 **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1004.6 1006.6 1001.3 996.2 989.7 986.6 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 19- 0 6-12 23-21 10-12 21-12 23-15 **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 858.9 859.5 856.3 857.0 854.3 853.6 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 862.8 863.6 859.8 860.2 858.2 857.2 ****** ****** ****** ****** ****** ****** ****** DAY 16 12 1 1 28 2 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 854.1 857.2 851.7 853.6 849.8 851.3 ****** ****** ****** ****** ****** ****** ****** DAY 19 6 6 19 21 19 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1015.6 1016.3 1012.6 1013.4 1010.3 1009.5 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1020.1 1021.0 1016.6 1017.1 1014.8 1013.6 ****** ****** ****** ****** ****** ****** ****** DAY 16 12 1 1 28 2 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1010.1 1013.6 1007.3 1009.5 1005.2 1006.9 ****** ****** ****** ****** ****** ****** ****** DAY 19 6 6 19 21 19 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1013.6 1012.1 1006.9 1004.1 998.6 995.8 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1018.9 1018.2 1013.0 1010.4 1004.7 999.9 ****** ****** ****** ****** ****** ****** ****** DAY 5 3 20 1 28 1 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1004.6 1007.1 1002.2 998.0 991.9 992.6 ****** ****** ****** ****** ****** ****** ****** DAY 19 21 24 19 22 7 ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.7 860.6 857.4 858.2 855.5 853.7 851.0 852.8 855.9 860.5 861.7 863.3 857.5 MAX. QFE PRESSURE IN HPA 863.4 865.3 860.9 860.7 859.2 858.0 853.4 857.1 861.3 862.3 865.5 866.1 866.1 DAY 16 12 1 1 13 2 8 19 30 27 15 2 MIN. QFE PRESSURE IN HPA 854.5 858.5 852.8 855.2 851.1 849.2 847.6 848.9 853.1 858.4 859.1 859.7 847.6 DAY 19 21 6 10 21 23 20 7 18 18 1 16 MEAN QNH PRESSURE IN HPA 1016.5 1017.5 1013.8 1014.8 1011.7 1009.6 1006.5 1008.6 1012.1 1017.4 1018.8 1020.7 1014.0 MAX. QNH PRESSURE IN HPA 1020.7 1022.9 1017.9 1017.6 1015.9 1014.6 1009.3 1013.5 1018.3 1019.5 1023.1 1023.8 1023.8 DAY 16 12 1 1 13 2 8 19 30 27 15 2 MIN. QNH PRESSURE IN HPA 1010.5 1015.1 1008.6 1011.4 1006.7 1004.5 1002.6 1004.1 1008.9 1015.0 1015.8 1016.5 1002.6 DAY 19 21 6 10 21 23 20 7 18 18 1 16 MEAN QFF PRESSURE IN HPA 1015.8 1014.4 1009.2 1006.0 1000.3 995.9 992.4 995.9 1001.3 1009.8 1013.6 1019.7 1006.2 MAX. QFF PRESSURE IN HPA 1022.7 1020.7 1016.4 1011.8 1005.8 1001.0 996.2 1001.0 1010.4 1012.7 1019.2 1024.1 1024.1 DAY 5 3 20 1 27 1 14 19 30 27 15 2 MIN. QFF PRESSURE IN HPA 1005.9 1008.7 1004.0 999.9 994.6 989.2 988.3 990.1 997.0 1006.8 1007.9 1014.5 988.3 DAY 19 21 23 10 21 24 11 6 18 8 12 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 860.8 861.8 858.4 858.9 855.7 853.8 851.1 853.1 856.4 861.2 862.4 864.3 858.2 MAX. QFE PRESSURE IN HPA 864.5 866.7 861.9 861.6 858.8 858.8 853.2 857.2 862.1 862.8 866.1 867.0 867.0 DAY 13 12 31 5 2 1 28 19 30 27 15 11 MIN. QFE PRESSURE IN HPA 855.6 858.6 854.2 855.6 851.1 849.4 848.2 849.2 853.5 858.3 859.8 860.5 848.2 DAY 19 6 6 10 21 23 20 7 16 18 4 16 MEAN QNH PRESSURE IN HPA 1017.8 1019.0 1015.0 1015.6 1012.0 1009.8 1006.7 1008.9 1012.7 1018.2 1019.6 1021.8 1014.7 MAX. QNH PRESSURE IN HPA 1022.0 1024.5 1019.0 1018.7 1015.5 1015.5 1009.1 1013.6 1019.3 1020.1 1023.8 1024.9 1024.9 DAY 13 12 31 5 2 1 28 19 30 27 15 11 MIN. QNH PRESSURE IN HPA 1011.8 1015.2 1010.2 1011.8 1006.7 1004.7 1003.3 1004.5 1009.4 1014.9 1016.6 1017.4 1003.3 DAY 19 6 6 10 21 23 20 7 16 18 4 16 MEAN QFF PRESSURE IN HPA 1016.1 1014.9 1009.1 1005.3 999.7 996.5 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1020.9 1021.0 1016.5 1011.3 1004.3 1001.9 ****** ****** ****** ****** ****** ****** ****** DAY 5 12 20 1 27 1 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1007.0 1010.7 1003.4 999.8 992.9 992.3 ****** ****** ****** ****** ****** ****** ****** DAY 19 6 23 10 21 22 ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 858.9 860.2 857.0 857.3 854.3 852.5 849.8 851.5 854.4 859.1 860.4 862.1 856.5 MAX. QFE PRESSURE IN HPA 862.3 865.2 860.1 859.7 857.7 858.1 851.7 855.2 859.9 860.8 864.3 865.0 865.2 DAY 15 12 20 4 2 1 28 18 30 27 18 24 MIN. QFE PRESSURE IN HPA 854.1 857.0 853.2 854.2 849.5 847.9 847.5 848.3 851.4 856.6 857.1 858.2 847.5 DAY 19 6 6 10 21 23 11 6 16 18 4 16 MEAN QNH PRESSURE IN HPA 1015.6 1017.1 1013.4 1013.7 1010.3 1008.2 1005.2 1007.1 1010.5 1015.8 1017.4 1019.3 1012.8 MAX. QNH PRESSURE IN HPA 1019.5 1022.8 1017.0 1016.5 1014.2 1014.7 1007.3 1011.4 1016.7 1017.8 1021.8 1022.6 1022.8 DAY 15 12 20 4 2 1 28 18 30 27 18 24 MIN. QNH PRESSURE IN HPA 1010.1 1013.4 1009.1 1010.2 1004.8 1003.0 1002.5 1003.4 1007.0 1013.0 1013.5 1014.8 1002.5 DAY 19 6 6 10 21 23 11 6 16 18 4 16 MEAN QFF PRESSURE IN HPA 1013.3 1012.5 1007.2 1003.8 998.0 994.8 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1017.7 1018.6 1013.9 1008.9 1003.2 1000.9 ****** ****** ****** ****** ****** ****** ****** DAY 14 12 20 12 27 1 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.2 1007.4 1002.6 998.5 991.0 989.9 ****** ****** ****** ****** ****** ****** ****** DAY 19 21 23 10 21 22 ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.0 859.0 855.6 855.8 852.9 851.1 848.5 850.2 853.2 858.0 859.5 861.3 855.3 MAX. QFE PRESSURE IN HPA 861.6 864.0 859.2 857.9 856.8 856.8 850.4 853.7 859.0 859.7 863.3 864.0 864.0 DAY 12 12 19 4 27 1 28 18 30 11 14 24 MIN. QFE PRESSURE IN HPA 853.5 855.6 851.8 851.9 847.8 846.6 845.9 847.3 850.0 855.8 856.5 857.8 845.9 DAY 19 6 5 10 21 23 12 6 16 3 4 15 MEAN QNH PRESSURE IN HPA 1014.5 1015.7 1011.8 1012.0 1008.7 1006.7 1003.6 1005.6 1009.0 1014.6 1016.3 1018.3 1011.4 MAX. QNH PRESSURE IN HPA 1018.7 1021.4 1015.9 1014.4 1013.2 1013.2 1005.8 1009.6 1015.7 1016.5 1020.6 1021.4 1021.4 DAY 12 12 19 4 27 1 28 18 30 11 14 24 MIN. QNH PRESSURE IN HPA 1009.4 1011.8 1007.5 1007.6 1002.9 1001.5 1000.7 1002.3 1005.4 1012.0 1012.8 1014.3 1000.7 DAY 19 6 5 10 21 23 12 6 16 3 4 15 MEAN QFF PRESSURE IN HPA 1012.5 1011.5 1006.2 1002.6 997.0 994.3 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1017.1 1017.5 1013.1 1008.0 1003.2 1000.0 ****** ****** ****** ****** ****** ****** ****** DAY 12 12 19 12 27 1 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1004.7 1006.6 1001.8 996.2 989.7 991.5 ****** ****** ****** ****** ****** ****** ****** DAY 19 6 23 10 21 21 ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.0 859.9 856.3 856.3 853.4 851.5 849.0 850.7 854.0 859.0 860.5 862.4 856.0 MAX. QFE PRESSURE IN HPA 863.5 864.7 860.0 858.6 857.0 857.7 851.2 854.7 859.7 860.7 864.4 864.8 864.8 DAY 12 12 19 4 27 1 27 18 30 11 14 1 MIN. QFE PRESSURE IN HPA 854.8 856.5 852.7 852.5 847.9 846.7 846.5 847.5 850.7 857.3 857.8 858.4 846.5 DAY 18 6 5 10 21 23 12 6 16 8 1 15 MEAN QNH PRESSURE IN HPA 1015.7 1016.7 1012.6 1012.6 1009.3 1007.1 1004.2 1006.2 1010.0 1015.7 1017.4 1019.6 1012.3 MAX. QNH PRESSURE IN HPA 1020.9 1022.2 1016.8 1015.2 1013.4 1014.2 1006.8 1010.8 1016.5 1017.6 1021.9 1022.3 1022.3 DAY 12 12 19 4 27 1 27 18 30 11 14 1 MIN. QNH PRESSURE IN HPA 1010.9 1012.8 1008.5 1008.3 1003.0 1001.6 1001.4 1002.5 1006.2 1013.8 1014.3 1015.0 1001.4 DAY 18 6 5 10 21 23 12 6 16 8 1 15 MEAN QFF PRESSURE IN HPA 1015.1 1013.5 1008.0 1003.7 997.8 993.4 990.2 993.4 999.3 1008.0 1012.3 1018.6 1004.4 MAX. QFF PRESSURE IN HPA 1020.9 1019.4 1014.5 1009.1 1003.3 1000.6 994.1 997.8 1008.8 1010.5 1017.7 1022.3 1022.3 DAY 12 2 19 1 27 1 14 18 30 28 14 7 MIN. QFF PRESSURE IN HPA 1007.1 1008.0 1002.6 997.7 990.5 986.6 987.1 987.6 994.6 1005.6 1006.9 1012.8 986.6 DAY 18 6 23 10 21 23 12 6 16 8 1 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 859.8 860.4 857.1 857.4 854.7 853.8 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 864.4 864.8 860.7 859.8 858.7 858.1 ****** ****** ****** ****** ****** ****** ****** DAY 12 12 19 4 27 1 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 855.0 856.6 852.6 853.8 850.0 850.6 ****** ****** ****** ****** ****** ****** ****** DAY 18 6 5 10 21 21 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.6 1017.3 1013.5 1013.9 1010.8 1009.7 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1021.9 1022.3 1017.6 1016.6 1015.4 1014.7 ****** ****** ****** ****** ****** ****** ****** DAY 12 12 19 4 27 1 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1011.1 1013.0 1008.4 1009.7 1005.4 1006.1 ****** ****** ****** ****** ****** ****** ****** DAY 18 6 5 10 21 21 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1014.9 1013.1 1007.7 1003.6 998.4 995.4 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1020.1 1019.3 1015.1 1008.9 1004.1 1001.2 ****** ****** ****** ****** ****** ****** ****** DAY 2 2 19 11 12 1 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.9 1008.2 1001.9 999.3 990.9 992.1 ****** ****** ****** ****** ****** ****** ****** DAY 18 6 23 10 21 21 ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 859.3 860.1 856.8 857.1 854.3 853.3 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 863.6 864.2 860.3 860.0 857.9 857.0 ****** ****** ****** ****** ****** ****** ****** DAY 12 12 19 4 27 1 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 854.7 856.8 852.3 853.8 849.6 850.2 ****** ****** ****** ****** ****** ****** ****** DAY 18 6 5 19 21 21 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.1 1017.0 1013.2 1013.5 1010.3 1009.2 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1021.0 1021.7 1017.2 1016.8 1014.4 1013.4 ****** ****** ****** ****** ****** ****** ****** DAY 12 12 19 4 27 1 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1010.8 1013.2 1008.0 1009.7 1004.9 1005.6 ****** ****** ****** ****** ****** ****** ****** DAY 18 6 5 19 21 21 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1013.7 1012.2 1007.0 1003.6 997.9 994.9 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1019.4 1018.2 1014.0 1008.7 1003.6 999.5 ****** ****** ****** ****** ****** ****** ****** DAY 13 2 19 11 12 1 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.3 1008.2 1001.3 998.8 990.3 991.0 ****** ****** ****** ****** ****** ****** ****** DAY 18 20 23 9 21 21 ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.9 12.9 17.1 26.9 32.8 32.1 32.1 31.5 29.2 24.1 15.8 12.9 23.2 MINIMUN AIR TEMPERATURE (C) 2.4 2.2 6.3 14.8 20.8 21.0 21.0 20.4 17.8 12.7 6.8 3.0 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 16 16 18 12 3 0 0 0 66 DAYS WITH MINIMUM TEMP. <=-4 4 2 0 0 0 0 0 0 0 0 0 1 7 DAYS WITH FREEZING MIN.<= 0 12 9 2 0 0 0 0 0 0 0 0 6 29 TEMPERATURE RECORDS LOWEST(C) -5.4 -7.0 -1.2 10.4 17.6 14.8 16.4 17.4 12.8 8.4 1.2 -6.0 -7.0 DAY 16 11 5 1 1 6 21 19 11 29 28 31 MAXIMUM AIR TEMPERATURE (C) 16.1 18.5 22.6 31.9 37.6 36.6 36.9 36.5 34.7 29.6 21.1 18.6 28.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 23 31 30 31 31 30 16 0 0 192 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.5 26.6 29.4 36.0 40.5 39.6 40.6 39.0 37.4 33.6 29.0 23.5 40.6 DAY 29 28 24 23 10 28 9 8 7 1 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 13.7 16.3 16.3 17.1 16.8 15.6 15.9 16.1 16.9 16.9 14.3 15.6 16.0 MEAN DAILY TEMP. (MDT) (C) 9.3 10.3 14.4 23.3 29.2 28.8 28.9 28.4 26.2 21.2 13.9 10.8 20.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 78.6 253.6 233.8 246.0 230.9 157.0 23.2 0.0 0.0 1223.4 HEATING DEG. DAYS(BASE 18 0C) 270.9 223.3 115.2 0.8 0.0 0.0 0.0 0.0 0.0 0.0 126.6 223.5 960.1 DEWPOINT (MEAN C) -3.3 -5.9 -5.0 1.1 2.5 3.0 0.8 1.1 2.9 0.5 -2.7 -3.7 -0.7 MIXING RATIO (G/KG) 3.84 3.06 3.41 4.93 5.56 5.81 4.99 5.07 5.82 4.83 4.08 3.62 4.59 VAPOUR PRESSURE (HPA) 5.27 4.19 4.67 6.73 7.56 7.87 6.77 6.88 7.92 6.62 5.61 4.97 6.25 SATURATION DEF. (HPA) 8.60 11.88 15.96 30.29 43.64 41.02 42.36 40.63 34.16 24.66 13.37 10.91 26.46 RELATIVE HUMIDITY (MEAN %) 42 29 26 20 16 17 15 16 20 23 31 36 24 RELATIVE HUMIDITY (MAX. %) 63 49 43 33 26 26 22 24 31 34 46 59 38 RELATIVE HUMIDITY (MIN. %) 29 18 16 14 11 12 10 11 14 16 22 23 16 RELATIVE HUMIDITY (MEAN% 03UTC) 60 49 41 33 26 26 22 24 31 34 46 57 37 RELATIVE HUMIDITY (MEAN% 09UTC) 33 22 19 15 13 14 11 12 15 17 25 28 19 RELATIVE HUMIDITY (MEAN% 15UTC) 39 26 25 18 14 15 14 13 19 22 30 33 22 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 11.5 0.0 15.4 0.0 0.0 0.0 0.0 0.0 3.0 0.0 0.0 10.1 40.0 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 0 0 1 0 0 0 0 0 0 0 0 1 2 DAYS WITH PRECIPITATION >= 1 4 0 3 0 0 0 0 0 1 0 0 2 10 DAYS WITH PRECIPITATION 6 0 3 1 0 0 0 1 1 0 0 2 14 GREATEST DAILY PRECIPITATION 4.2 0.0 10.0 0.0 0.0 0.0 0.0 0.0 3.0 0.0 0.0 7.0 10.0 DAY 18 ** 29 ** ** ** ** ** 24 ** ** 16 DAY WITH THUNDER STORM 0 0 1 1 0 0 0 1 1 0 0 0 4 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 7 12 1 4 15 20 8 3 1 0 2 74 WIND DIRECTION (PREVAILING) 360 360 360 360 90 90 360 360 90 360 360 315 360 PREVAILING WIND SPEED(KNOTS) 9.8 10.1 11.1 9.5 11.3 11.2 13.4 11.0 8.8 7.6 6.8 6.2 10.4 PREVAILING WIND PERCENT 18.1 20.7 20.6 17.3 18.7 22.7 36.8 32.9 18.7 17.4 12.0 14.8 19.4 CALMS PERCENT OF WIND 30.3 26.2 22.6 26.0 27.1 20.0 21.3 21.3 32.7 43.9 38.0 34.8 28.7 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 298 314 304 316 23 45 33 19 45 41 345 242 354 VECTOR WIND MAGNITUDE(KNOTS) 3.2 3.6 3.7 2.2 1.7 2.9 5.6 4.1 2.4 1.6 0.6 2.3 1.9 WIND STEADINESES (MEAN %) 47.1 46.2 42.5 32.4 23.3 33.7 61.5 51.2 42.1 39.0 12.2 42.6 27.5 WIND SPEED (MEAN KNOTS) 6.8 7.8 8.7 6.8 7.3 8.6 9.1 8.0 5.7 4.1 4.9 5.4 6.9 FASTEST WIND DIRECTION 290 260 260 350 340 360 20 320 360 280 270 280 20 FASTEST WIND SPEED (KNOTS) 21 25 25 21 19 25 27 25 21 14 16 21 27 DAY 21 7 5 12 12 19 23 4 8 4 10 27 DAYS WITH SKY CLEAR (0-2)/8 18 22 25 23 28 30 30 28 27 29 20 23 303 DAYS WITH P.CLOUDY (3-6)/8 10 7 5 7 3 0 1 3 3 2 10 5 56 DAYS WITH CLOUDY (7-8)/8 3 0 1 0 0 0 0 0 0 0 0 3 7 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 0 2 2 0 0 0 0 0 5 DURATION OF SUNSHINE HOURS 234.6 265.7 288.2 327.1 358.4 361.1 374.0 346.7 293.6 308.5 265.2 250.7 3673.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.3 857.9 857.4 856.6 853.6 851.4 850.3 851.8 855.1 859.8 861.3 861.0 856.3 MAX. QFE PRESSURE IN HPA 864.7 863.5 861.8 861.3 859.5 856.5 855.0 856.0 860.7 864.2 867.4 866.3 867.4 DAY-HOUR 31- 6 24- 6 24- 6 1- 6 6- 6 3- 6 29- 6 23- 6 29- 6 26- 6 30- 6 17- 6 MIN. QFE PRESSURE IN HPA 853.6 852.2 852.4 852.5 848.3 846.8 844.9 847.2 846.9 855.2 854.0 856.5 844.9 DAY-HOUR 10-12 8-12 5-12 21-12 17-12 25-12 9-12 30-12 1-12 1-12 6-12 14-12 MEAN QNH PRESSURE IN HPA 1016.0 1014.5 1013.9 1012.9 1009.6 1007.0 1005.7 1007.5 1011.2 1016.6 1018.3 1018.0 1012.6 MAX. QNH PRESSURE IN HPA 1022.2 1020.9 1018.9 1018.3 1016.3 1012.8 1011.1 1012.3 1017.6 1021.7 1025.3 1024.1 1025.3 DAY-HOUR 31- 6 24- 6 24- 6 1- 6 6- 6 3- 6 29- 6 23- 6 29- 6 26- 6 30- 6 17- 6 MIN. QNH PRESSURE IN HPA 1009.5 1007.9 1008.1 1008.3 1003.4 1001.7 999.5 1002.2 1001.8 1011.4 1010.0 1012.8 999.5 DAY-HOUR 10-12 8-12 5-12 21-12 17-12 25-12 9-12 30-12 1-12 1-12 6-12 14-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.6 858.5 858.1 857.6 854.9 852.9 851.6 853.1 856.1 860.7 862.0 861.6 857.2 MAX. QFE PRESSURE IN HPA 863.8 862.1 861.0 860.1 859.3 856.1 854.7 855.8 860.3 863.3 866.6 865.5 866.6 DAY 31 25 25 1 6 3 29 20 29 26 17 18 MIN. QFE PRESSURE IN HPA 854.1 853.1 853.8 855.4 851.6 849.5 848.0 849.4 849.5 858.0 856.8 857.5 848.0 DAY 21 8 3 12 17 25 11 31 1 1 7 15 MEAN QNH PRESSURE IN HPA 1016.4 1015.1 1014.7 1014.1 1011.0 1008.7 1007.2 1008.9 1012.4 1017.6 1019.1 1018.7 1013.7 MAX. QNH PRESSURE IN HPA 1021.2 1019.3 1018.0 1017.0 1016.0 1012.4 1010.8 1012.0 1017.2 1020.6 1024.4 1023.1 1024.4 DAY 31 25 25 1 6 3 29 20 29 26 17 18 MIN. QNH PRESSURE IN HPA 1010.1 1008.9 1009.7 1011.6 1007.2 1004.8 1003.1 1004.7 1004.8 1014.6 1013.2 1014.0 1003.1 DAY 21 8 3 12 17 25 11 31 1 1 7 15 MEAN QFF PRESSURE IN HPA 1015.4 1013.4 1010.3 1004.3 997.6 995.4 994.1 996.3 1001.3 1009.6 1015.5 1016.8 1005.8 MAX. QFF PRESSURE IN HPA 1021.8 1022.4 1015.7 1011.0 1004.0 1000.8 999.0 1000.7 1007.1 1013.1 1023.2 1023.0 1023.2 DAY 15 11 7 1 6 17 26 20 23 29 30 18 MIN. QFF PRESSURE IN HPA 1005.7 1005.1 1004.1 1000.1 993.8 989.9 988.7 992.4 992.3 1004.2 1006.6 1008.9 988.7 DAY 21 8 3 26 17 25 11 2 2 4 7 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 860.9 859.6 859.0 858.2 855.2 852.7 851.5 853.2 856.6 861.4 862.8 862.6 857.8 MAX. QFE PRESSURE IN HPA 864.7 863.5 861.8 861.3 859.5 856.5 855.0 856.0 860.7 864.2 867.4 866.3 867.4 DAY 31 24 24 1 6 3 29 23 29 26 30 17 MIN. QFE PRESSURE IN HPA 855.4 854.3 855.6 855.6 851.4 849.5 847.8 850.0 849.9 858.7 857.8 859.0 847.8 DAY 21 8 12 6 17 25 12 1 1 1 22 16 MEAN QNH PRESSURE IN HPA 1017.9 1016.3 1015.7 1014.8 1011.3 1008.5 1007.1 1009.1 1012.9 1018.4 1020.0 1019.8 1014.3 MAX. QNH PRESSURE IN HPA 1022.2 1020.9 1018.9 1018.3 1016.3 1012.8 1011.1 1012.3 1017.6 1021.7 1025.3 1024.1 1025.3 DAY 31 24 24 1 6 3 29 23 29 26 30 17 MIN. QNH PRESSURE IN HPA 1011.6 1010.3 1011.8 1011.8 1007.0 1004.8 1002.9 1005.4 1005.3 1015.4 1014.3 1015.7 1002.9 DAY 21 8 12 6 17 25 12 1 1 1 22 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 858.8 857.8 857.4 856.7 853.7 851.3 850.2 851.7 854.8 859.4 860.7 860.5 856.1 MAX. QFE PRESSURE IN HPA 862.4 862.1 860.6 860.3 858.1 855.3 853.5 854.7 859.3 862.2 866.0 864.5 866.0 DAY 31 24 28 1 6 3 29 20 29 26 30 17 MIN. QFE PRESSURE IN HPA 854.3 853.0 854.3 854.1 849.8 848.0 846.0 848.7 848.3 856.6 855.7 857.1 846.0 DAY 21 8 5 21 17 26 10 31 1 1 22 15 MEAN QNH PRESSURE IN HPA 1015.5 1014.3 1013.8 1013.1 1009.7 1006.9 1005.6 1007.3 1010.9 1016.2 1017.7 1017.4 1012.4 MAX. QNH PRESSURE IN HPA 1019.6 1019.3 1017.5 1017.2 1014.7 1011.5 1009.4 1010.8 1016.0 1019.4 1023.7 1022.0 1023.7 DAY 31 24 28 1 6 3 29 20 29 26 30 17 MIN. QNH PRESSURE IN HPA 1010.3 1008.8 1010.3 1010.1 1005.2 1003.1 1000.8 1003.9 1003.4 1013.0 1011.9 1013.5 1000.8 DAY 21 8 5 21 17 26 10 31 1 1 22 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.0 856.4 855.9 854.9 852.0 850.0 848.9 850.4 853.5 858.3 859.8 859.7 854.8 MAX. QFE PRESSURE IN HPA 861.7 860.6 859.5 858.6 856.1 853.5 852.7 853.5 858.0 861.4 865.0 864.1 865.0 DAY 18 24 28 1 5 3 30 13 29 26 30 17 MIN. QFE PRESSURE IN HPA 853.6 852.2 852.4 852.5 848.3 846.8 844.9 847.2 846.9 855.2 854.0 856.5 844.9 DAY 10 8 5 21 17 25 9 30 1 1 6 14 MEAN QNH PRESSURE IN HPA 1014.5 1012.8 1012.2 1011.0 1007.7 1005.4 1004.1 1005.8 1009.4 1014.9 1016.7 1016.6 1010.9 MAX. QNH PRESSURE IN HPA 1018.8 1017.5 1016.3 1015.2 1012.4 1009.4 1008.5 1009.4 1014.6 1018.5 1022.6 1021.5 1022.6 DAY 18 24 28 1 5 3 30 13 29 26 30 17 MIN. QNH PRESSURE IN HPA 1009.5 1007.9 1008.1 1008.3 1003.4 1001.7 999.5 1002.2 1001.8 1011.4 1010.0 1012.8 999.5 DAY 10 8 5 21 17 25 9 30 1 1 6 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.1 857.3 856.6 855.5 852.4 850.4 849.4 850.9 854.4 859.3 861.0 860.9 855.6 MAX. QFE PRESSURE IN HPA 862.2 861.2 859.6 858.7 857.1 853.5 853.1 854.1 859.2 862.1 866.0 865.5 866.0 DAY 18 24 28 1 5 3 30 13 29 16 30 17 MIN. QFE PRESSURE IN HPA 854.0 853.5 852.7 853.0 848.4 847.0 845.3 847.7 847.6 855.8 855.2 857.2 845.3 DAY 10 7 5 21 17 24 11 30 1 1 6 14 MEAN QNH PRESSURE IN HPA 1015.8 1013.8 1013.0 1011.7 1008.2 1005.9 1004.7 1006.4 1010.4 1016.0 1018.0 1017.8 1011.8 MAX. QNH PRESSURE IN HPA 1019.4 1018.2 1016.4 1015.4 1013.5 1009.4 1008.9 1010.1 1015.9 1019.3 1023.7 1023.1 1023.7 DAY 18 24 28 1 5 3 30 13 29 16 30 17 MIN. QNH PRESSURE IN HPA 1010.0 1009.4 1008.5 1008.8 1003.6 1002.0 1000.0 1002.8 1002.6 1012.0 1011.4 1013.6 1000.0 DAY 10 7 5 21 17 24 11 30 1 1 6 14 MEAN QFF PRESSURE IN HPA 1014.7 1011.9 1008.6 1001.7 994.8 992.7 991.5 993.8 999.2 1007.9 1014.4 1016.0 1003.9 MAX. QFF PRESSURE IN HPA 1020.8 1020.6 1013.4 1008.7 1000.5 997.0 996.9 998.0 1005.1 1011.5 1023.1 1023.5 1023.5 DAY 26 11 4 1 5 3 26 13 29 29 30 17 MIN. QFF PRESSURE IN HPA 1006.6 1005.9 1004.5 997.8 989.9 987.6 985.5 989.6 990.4 1002.3 1004.4 1010.2 985.5 DAY 10 7 20 23 28 25 11 1 1 1 6 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.8 12.7 18.3 25.6 32.1 32.9 33.5 31.4 28.7 23.9 17.4 15.6 23.5 MINIMUN AIR TEMPERATURE (C) -0.7 3.9 8.9 13.4 19.7 22.0 24.3 20.1 17.4 11.3 6.2 5.8 12.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 11 19 26 12 6 0 0 0 74 DAYS WITH MINIMUM TEMP. <=-4 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH FREEZING MIN.<= 0 19 4 0 0 0 0 0 0 0 0 0 0 23 TEMPERATURE RECORDS LOWEST(C) -6.4 -4.4 2.6 7.4 14.0 16.0 16.4 14.8 11.8 6.0 1.0 1.4 -6.4 DAY 30 2 6 4 8 6 31 22 16 12 24 31 MAXIMUM AIR TEMPERATURE (C) 16.0 18.1 23.3 30.9 37.1 37.7 38.3 36.6 34.4 30.0 23.2 21.2 28.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 18 31 30 31 31 29 22 1 0 193 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 23.2 27.4 35.8 39.0 41.4 41.4 39.5 40.4 32.8 30.5 24.8 41.4 DAY 16 20 31 29 19 30 2 29 1 3 1 7 DIF. BETWEEN (MAX.-MIN.) (C) 16.7 14.2 14.4 17.5 17.4 15.7 14.0 16.5 17.0 18.7 17.0 15.4 16.2 MEAN DAILY TEMP. (MDT) (C) 7.6 11.0 16.1 22.2 28.4 29.8 31.3 28.3 25.9 20.7 14.7 13.5 20.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 45.9 229.4 265.5 320.3 227.8 147.7 15.2 0.3 0.0 1252.4 HEATING DEG. DAYS(BASE 18 0C) 321.0 197.3 62.7 0.0 0.0 0.0 0.0 0.0 0.0 2.8 102.9 139.9 826.4 DEWPOINT (MEAN C) -5.5 -2.8 -0.2 -0.6 1.3 1.2 4.3 0.5 0.1 -2.8 -3.3 2.4 -0.4 MIXING RATIO (G/KG) 3.12 3.93 4.59 4.65 5.09 5.29 6.94 4.84 4.72 3.81 3.60 5.38 4.66 VAPOUR PRESSURE (HPA) 4.29 5.39 6.28 6.34 6.93 7.16 9.35 6.58 6.45 5.23 4.96 7.40 6.36 SATURATION DEF. (HPA) 8.76 10.17 15.67 27.96 42.10 44.06 43.58 40.92 34.91 26.10 16.09 11.11 26.79 RELATIVE HUMIDITY (MEAN %) 38 39 32 20 15 15 19 15 17 19 27 44 25 RELATIVE HUMIDITY (MAX. %) 59 63 51 35 24 24 33 24 27 32 45 68 40 RELATIVE HUMIDITY (MIN. %) 26 26 22 13 11 10 12 10 11 12 17 30 17 RELATIVE HUMIDITY (MEAN% 03UTC) 58 60 50 35 24 24 33 24 27 31 45 68 40 RELATIVE HUMIDITY (MEAN% 09UTC) 30 33 24 15 12 12 14 12 13 13 19 34 19 RELATIVE HUMIDITY (MEAN% 15UTC) 35 36 27 17 13 13 16 12 16 18 24 38 22 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 6.0 31.3 3.8 0.0 0.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 41.5 DAYS WITH PRECIPITATION >=10 0 2 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 1 2 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 1 1 4 2 0 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION 1 6 3 0 0 1 1 0 0 0 0 0 12 GREATEST DAILY PRECIPITATION 6.0 14.0 2.4 0.0 0.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 14.0 DAY 28 12 11 ** ** ** 14 ** ** ** ** ** DAY WITH THUNDER STORM 0 1 0 0 0 0 2 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 4 4 1 11 13 19 10 9 3 4 1 79 WIND DIRECTION (PREVAILING) 270 315 180 225 270 45 45 45 45 315 315 225 315 PREVAILING WIND SPEED(KNOTS) 9.8 8.4 13.3 10.5 10.7 11.0 10.9 9.9 11.7 7.2 7.6 10.3 8.5 PREVAILING WIND PERCENT 18.7 17.1 14.8 17.3 18.1 24.0 29.0 34.2 22.0 17.4 23.3 16.8 15.2 CALMS PERCENT OF WIND 29.7 20.7 24.5 20.0 18.7 19.3 18.1 18.7 26.7 28.4 22.0 23.9 22.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 280 261 233 236 294 355 3 12 8 298 257 242 307 VECTOR WIND MAGNITUDE(KNOTS) 2.2 1.9 2.0 2.7 2.5 3.5 4.0 3.6 3.4 0.5 2.2 3.4 1.5 WIND STEADINESES (MEAN %) 38.6 24.7 26.0 36.5 31.6 42.7 45.5 47.4 45.9 7.8 32.8 51.5 20.3 WIND SPEED (MEAN KNOTS) 5.7 7.7 7.7 7.4 7.9 8.2 8.8 7.6 7.4 6.4 6.7 6.6 7.4 FASTEST WIND DIRECTION 250 170 180 40 310 300 320 60 320 330 220 300 180 FASTEST WIND SPEED (KNOTS) 17 23 33 19 31 25 27 21 23 19 19 19 33 DAY 20 19 26 3 19 23 28 11 13 5 7 17 DAYS WITH SKY CLEAR (0-2)/8 28 18 22 25 28 27 26 29 30 31 27 18 309 DAYS WITH P.CLOUDY (3-6)/8 2 6 7 4 2 3 3 2 0 0 3 13 45 DAYS WITH CLOUDY (7-8)/8 1 4 2 1 1 0 2 0 0 0 0 0 11 DAYS WITH VISIBILITY =< 2 KM 0 2 2 0 2 6 8 1 1 1 1 0 24 DURATION OF SUNSHINE HOURS 267.3 232.0 279.6 313.4 341.6 310.6 317.6 353.0 305.6 311.2 274.9 259.7 3566.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.0 858.8 858.0 856.6 853.7 850.4 849.9 852.8 856.3 859.9 861.4 862.9 856.7 MAX. QFE PRESSURE IN HPA 864.3 865.1 866.3 863.3 858.9 856.1 854.4 857.3 862.7 863.6 865.1 869.0 869.0 DAY-HOUR 3- 6 10- 6 2- 6 4- 6 5- 6 2- 6 31- 6 5- 3 22- 6 10- 6 3- 6 18- 6 MIN. QFE PRESSURE IN HPA 855.7 853.2 848.1 851.0 848.4 846.6 845.5 849.0 849.3 855.4 857.1 858.1 845.5 DAY-HOUR 20-12 21-12 26-12 13-12 25-12 11-12 12-12 2-12 1-12 3-12 1-12 5-12 MEAN QNH PRESSURE IN HPA 1016.9 1015.5 1014.5 1013.0 1009.6 1005.8 1005.3 1008.6 1012.6 1016.7 1018.5 1020.1 1013.1 MAX. QNH PRESSURE IN HPA 1021.8 1022.7 1024.1 1020.6 1015.6 1012.4 1010.4 1013.8 1019.9 1021.0 1022.7 1027.2 1027.2 DAY-HOUR 3- 6 10- 6 2- 6 4- 6 5- 6 2- 6 31- 6 5- 3 22- 6 10- 6 3- 6 18- 6 MIN. QNH PRESSURE IN HPA 1011.9 1009.1 1003.2 1006.5 1003.6 1001.5 1000.2 1004.2 1004.6 1011.6 1013.5 1014.7 1000.2 DAY-HOUR 20-12 21-12 26-12 13-12 25-12 11-12 12-12 2-12 1-12 3-12 1-12 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.5 859.2 858.7 857.6 854.8 851.6 850.9 854.0 857.3 860.7 862.1 863.5 857.6 MAX. QFE PRESSURE IN HPA 863.3 864.4 865.6 862.5 857.9 855.5 854.0 857.3 862.0 862.8 864.6 868.1 868.1 DAY 30 10 2 5 5 2 31 5 22 10 21 18 MIN. QFE PRESSURE IN HPA 856.0 853.8 851.9 852.5 850.9 849.6 848.5 851.1 852.7 858.1 858.8 860.7 848.5 DAY 28 5 27 18 26 17 4 3 1 1 1 3 MEAN QNH PRESSURE IN HPA 1017.4 1015.9 1015.4 1014.1 1010.9 1007.3 1006.5 1010.0 1013.7 1017.6 1019.3 1020.8 1014.1 MAX. QNH PRESSURE IN HPA 1020.6 1021.9 1023.3 1019.7 1014.4 1011.7 1010.0 1013.8 1019.1 1020.1 1022.1 1026.1 1026.1 DAY 30 10 2 5 5 2 31 5 22 10 21 18 MIN. QNH PRESSURE IN HPA 1012.3 1009.7 1007.6 1008.3 1006.4 1004.9 1003.7 1006.7 1008.5 1014.7 1015.5 1017.6 1003.7 DAY 28 5 27 18 26 17 4 3 1 1 1 3 MEAN QFF PRESSURE IN HPA 1017.6 1013.9 1010.0 1005.0 998.1 993.8 992.2 997.5 1003.1 1010.2 1015.2 1017.4 1006.1 MAX. QFF PRESSURE IN HPA 1026.1 1021.7 1019.7 1012.9 1001.8 999.0 998.8 1002.0 1010.6 1013.2 1019.1 1023.0 1026.1 DAY 30 1 2 4 5 3 31 15 22 12 21 19 MIN. QFF PRESSURE IN HPA 1008.9 1004.3 1000.4 997.9 992.3 990.7 987.9 994.0 994.9 1005.3 1007.4 1012.1 987.9 DAY 28 22 26 18 26 29 12 3 2 3 1 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.6 860.3 859.6 858.2 855.2 851.6 851.0 854.3 857.9 861.5 863.0 864.5 858.2 MAX. QFE PRESSURE IN HPA 864.3 865.1 866.3 863.3 858.9 856.1 854.4 857.2 862.7 863.6 865.1 869.0 869.0 DAY 3 10 2 4 5 2 31 5 22 10 3 18 MIN. QFE PRESSURE IN HPA 857.9 855.4 853.0 853.5 851.1 849.6 848.3 851.5 853.5 859.0 860.1 861.5 848.3 DAY 28 5 27 18 26 17 9 3 1 1 1 5 MEAN QNH PRESSURE IN HPA 1018.7 1017.2 1016.4 1014.8 1011.3 1007.3 1006.6 1010.3 1014.5 1018.6 1020.3 1022.0 1014.8 MAX. QNH PRESSURE IN HPA 1021.8 1022.7 1024.1 1020.6 1015.6 1012.4 1010.4 1013.6 1019.9 1021.0 1022.7 1027.2 1027.2 DAY 3 10 2 4 5 2 31 5 22 10 3 18 MIN. QNH PRESSURE IN HPA 1014.4 1011.6 1008.8 1009.4 1006.7 1004.9 1003.4 1007.1 1009.4 1015.7 1017.0 1018.6 1003.4 DAY 28 5 27 18 26 17 9 3 1 1 1 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.8 858.7 858.1 856.8 853.7 850.3 849.9 852.7 856.1 859.5 860.9 862.4 856.6 MAX. QFE PRESSURE IN HPA 862.6 863.5 864.3 862.4 857.3 855.2 853.5 855.6 860.6 861.7 863.1 866.6 866.6 DAY 3 28 2 1 5 2 31 5 22 16 20 18 MIN. QFE PRESSURE IN HPA 856.5 853.9 850.7 852.0 849.8 848.1 846.8 850.4 851.7 857.0 858.3 859.3 846.8 DAY 20 21 26 18 26 17 9 3 1 3 17 5 MEAN QNH PRESSURE IN HPA 1016.6 1015.4 1014.6 1013.2 1009.7 1005.8 1005.3 1008.4 1012.4 1016.3 1017.9 1019.5 1012.9 MAX. QNH PRESSURE IN HPA 1019.8 1020.9 1021.8 1019.6 1013.8 1011.4 1009.4 1011.8 1017.5 1018.8 1020.4 1024.4 1024.4 DAY 3 28 2 1 5 2 31 5 22 16 20 18 MIN. QNH PRESSURE IN HPA 1012.8 1009.9 1006.2 1007.7 1005.2 1003.2 1001.7 1005.8 1007.3 1013.4 1014.9 1016.0 1001.7 DAY 20 21 26 18 26 17 9 3 1 3 17 5 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 858.6 857.6 856.4 855.1 852.2 849.0 848.5 851.2 854.8 858.5 860.0 861.5 855.3 MAX. QFE PRESSURE IN HPA 861.1 862.3 862.8 861.0 855.5 854.1 852.3 854.3 859.6 860.6 862.5 865.7 865.7 DAY 15 9 1 4 5 2 31 5 22 23 20 18 MIN. QFE PRESSURE IN HPA 855.7 853.2 848.1 851.0 848.4 846.6 845.5 849.0 849.3 855.4 857.1 858.1 845.5 DAY 20 21 26 13 25 11 12 2 1 3 1 5 MEAN QNH PRESSURE IN HPA 1015.3 1014.1 1012.7 1011.2 1007.9 1004.2 1003.7 1006.8 1010.9 1015.1 1016.8 1018.6 1011.4 MAX. QNH PRESSURE IN HPA 1018.1 1019.5 1020.1 1018.0 1011.7 1010.1 1008.0 1010.3 1016.4 1017.5 1019.7 1023.4 1023.4 DAY 15 9 1 4 5 2 31 5 22 23 20 18 MIN. QNH PRESSURE IN HPA 1011.9 1009.1 1003.2 1006.5 1003.6 1001.5 1000.2 1004.2 1004.6 1011.6 1013.5 1014.7 1000.2 DAY 20 21 26 13 25 11 12 2 1 3 1 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.6 858.4 857.1 855.6 852.6 849.4 849.1 851.7 855.7 859.4 861.1 862.6 856.0 MAX. QFE PRESSURE IN HPA 862.3 863.6 863.9 861.3 855.5 854.3 852.5 854.4 860.3 861.5 863.5 866.4 866.4 DAY 15 9 1 4 5 2 31 14 22 23 20 18 MIN. QFE PRESSURE IN HPA 856.6 853.6 849.0 852.1 848.8 847.3 846.2 849.3 851.0 856.6 858.2 858.8 846.2 DAY 27 4 26 17 25 17 9 2 1 3 28 5 MEAN QNH PRESSURE IN HPA 1016.4 1015.0 1013.6 1011.8 1008.4 1004.7 1004.4 1007.4 1011.9 1016.2 1018.1 1019.9 1012.3 MAX. QNH PRESSURE IN HPA 1019.5 1021.0 1021.3 1018.3 1011.7 1010.3 1008.3 1010.4 1017.2 1018.6 1020.9 1024.2 1024.2 DAY 15 9 1 4 5 2 31 14 22 23 20 18 MIN. QNH PRESSURE IN HPA 1013.0 1009.5 1004.2 1007.8 1004.0 1002.3 1001.0 1004.6 1006.5 1013.0 1014.8 1015.5 1001.0 DAY 27 4 26 17 25 17 9 2 1 3 28 5 MEAN QFF PRESSURE IN HPA 1016.5 1012.9 1008.1 1002.6 995.5 991.1 990.3 994.8 1001.2 1008.7 1014.1 1016.4 1004.3 MAX. QFF PRESSURE IN HPA 1023.5 1019.8 1018.5 1011.7 999.0 996.1 996.8 999.4 1008.4 1012.8 1017.8 1021.3 1023.5 DAY 30 1 1 4 5 2 31 14 22 12 20 18 MIN. QFF PRESSURE IN HPA 1010.2 1003.6 995.8 997.4 990.3 987.9 986.2 991.3 993.1 1003.5 1008.7 1011.4 986.2 DAY 20 21 26 28 25 29 12 2 1 3 1 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.6 13.0 18.5 24.4 30.9 33.3 33.2 32.6 28.2 24.3 16.2 12.0 23.1 MINIMUN AIR TEMPERATURE (C) 2.0 4.2 9.1 14.4 19.8 22.6 23.2 21.7 16.6 12.4 7.4 3.3 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 1 2 7 25 25 21 3 0 0 0 84 DAYS WITH MINIMUM TEMP. <=-4 8 1 0 0 0 0 0 0 0 0 0 2 11 DAYS WITH FREEZING MIN.<= 0 12 7 0 0 0 0 0 0 0 0 0 10 29 TEMPERATURE RECORDS LOWEST(C) -6.8 -5.0 1.2 7.0 14.4 19.2 18.8 17.4 12.4 8.0 2.2 -6.4 -6.8 DAY 27 8 12 5 8 2 31 15 22 21 29 31 MAXIMUM AIR TEMPERATURE (C) 15.7 18.2 23.7 29.3 35.8 37.8 38.4 38.0 34.1 29.8 21.5 17.4 28.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 13 31 30 31 31 30 17 0 0 183 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.6 23.6 28.5 36.0 38.6 40.5 41.0 40.6 37.0 32.8 28.2 21.4 41.0 DAY 1 27 29 29 26 7 20 9 1 6 1 14 DIF. BETWEEN (MAX.-MIN.) (C) 13.7 14.0 14.6 14.9 16.0 15.2 15.2 16.3 17.5 17.4 14.1 14.1 15.2 MEAN DAILY TEMP. (MDT) (C) 8.8 11.2 16.4 21.8 27.8 30.2 30.8 29.8 25.4 21.1 14.4 10.3 20.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 9.1 56.5 211.6 277.4 304.7 273.4 130.8 22.8 0.0 0.0 1286.5 HEATING DEG. DAYS(BASE 18 0C) 284.4 192.2 75.6 5.1 0.0 0.0 0.0 0.0 0.0 0.0 112.6 237.7 907.4 DEWPOINT (MEAN C) -2.1 -2.1 -1.9 -1.1 2.0 2.1 1.8 3.5 -0.8 -2.2 -0.6 -3.5 -0.4 MIXING RATIO (G/KG) 4.20 4.12 4.18 4.33 5.32 5.38 5.35 6.09 4.49 3.92 4.61 3.98 4.67 VAPOUR PRESSURE (HPA) 5.77 5.65 5.73 5.92 7.25 7.31 7.26 8.25 6.13 5.39 6.33 5.46 6.37 SATURATION DEF. (HPA) 7.87 10.25 16.81 26.08 38.58 44.90 44.96 42.52 33.73 26.35 13.06 9.44 26.21 RELATIVE HUMIDITY (MEAN %) 45 39 28 21 17 15 15 18 17 19 37 38 26 RELATIVE HUMIDITY (MAX. %) 71 65 47 35 26 23 23 30 26 31 59 59 41 RELATIVE HUMIDITY (MIN. %) 32 25 19 13 12 11 10 11 10 12 23 26 17 RELATIVE HUMIDITY (MEAN% 03UTC) 70 64 45 34 26 23 23 29 25 30 58 58 40 RELATIVE HUMIDITY (MEAN% 09UTC) 35 29 21 16 13 12 11 13 13 14 27 28 19 RELATIVE HUMIDITY (MEAN% 15UTC) 40 34 27 19 15 13 13 14 16 19 35 35 23 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 7.0 21.0 0.4 6.0 0.0 1.0 0.0 0.0 5.5 0.0 16.0 0.3 57.2 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH PRECIPITATION >= 5 1 2 0 0 0 0 0 0 1 0 1 0 5 DAYS WITH PRECIPITATION >= 1 1 3 0 2 0 1 0 0 1 0 5 0 13 DAYS WITH PRECIPITATION 3 3 5 2 0 1 0 0 1 1 6 1 23 GREATEST DAILY PRECIPITATION 7.0 9.0 0.3 3.0 0.0 1.0 0.0 0.0 5.5 0.0 5.0 0.3 9.0 DAY 13 20 30 13 ** 1 ** ** 20 ** 10 23 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 0 2 0 1 0 4 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 7 5 9 10 10 10 10 11 5 1 0 5 83 WIND DIRECTION (PREVAILING) 180 270 270 270 270 45 45 45 45 315 315 225 315 PREVAILING WIND SPEED(KNOTS) 11.4 12.9 12.9 11.9 11.8 11.0 10.2 10.2 10.7 7.0 6.6 12.1 8.8 PREVAILING WIND PERCENT 20.0 19.3 21.3 22.7 21.9 30.7 24.5 23.9 19.3 15.5 17.3 20.6 15.2 CALMS PERCENT OF WIND 21.3 15.7 19.4 16.0 13.5 11.3 14.8 19.4 28.0 32.3 35.3 28.4 21.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 235 237 261 252 295 20 336 344 355 334 279 225 292 VECTOR WIND MAGNITUDE(KNOTS) 2.7 3.9 3.9 3.0 2.9 4.0 4.9 3.0 2.4 1.9 1.3 4.1 1.9 WIND STEADINESES (MEAN %) 34.2 43.8 45.9 33.7 32.2 45.5 56.3 37.0 36.4 34.5 24.1 55.4 24.4 WIND SPEED (MEAN KNOTS) 7.9 8.9 8.5 8.9 9.0 8.8 8.7 8.1 6.6 5.5 5.4 7.4 7.8 FASTEST WIND DIRECTION 340 210 290 170 300 360 320 270 30 300 180 210 170 FASTEST WIND SPEED (KNOTS) 27 25 25 35 27 23 27 29 19 25 19 23 35 DAY 26 13 7 4 19 1 4 14 20 20 4 12 DAYS WITH SKY CLEAR (0-2)/8 18 17 16 20 26 24 26 28 29 27 24 17 272 DAYS WITH P.CLOUDY (3-6)/8 12 8 11 7 5 6 5 3 1 4 4 13 79 DAYS WITH CLOUDY (7-8)/8 1 3 4 3 0 0 0 0 0 0 2 1 14 DAYS WITH VISIBILITY =< 2 KM 0 0 2 2 3 0 5 3 1 1 0 1 18 DURATION OF SUNSHINE HOURS 242.8 234.3 275.6 289.3 342.2 322.8 329.5 330.3 318.7 299.8 243.6 257.0 3485.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.2 860.4 858.9 856.6 855.0 852.4 851.8 851.5 856.6 860.0 861.5 860.4 857.1 MAX. QFE PRESSURE IN HPA 865.1 867.3 866.3 863.3 861.1 856.7 855.3 857.4 861.0 864.1 867.0 865.9 867.3 DAY-HOUR 7- 6 2- 6 13- 6 1- 6 10- 6 6- 6 3- 6 30- 6 30- 6 9- 6 18- 6 13- 6 MIN. QFE PRESSURE IN HPA 853.8 855.3 854.1 847.0 850.9 846.3 848.3 847.0 852.2 855.6 857.6 853.9 846.3 DAY-HOUR 22-12 4-12 23-12 4- 9 6-12 22-12 22-12 9-12 10-12 12-12 26-12 22-12 MEAN QNH PRESSURE IN HPA 1017.1 1017.3 1015.6 1013.0 1011.1 1008.1 1007.4 1007.1 1013.0 1016.9 1018.6 1017.3 1013.5 MAX. QNH PRESSURE IN HPA 1022.7 1025.2 1024.1 1020.6 1018.1 1013.1 1011.5 1013.9 1018.0 1021.5 1024.9 1023.6 1025.2 DAY-HOUR 7- 6 2- 6 13- 6 1- 6 10- 6 6- 6 3- 6 30- 6 30- 6 9- 6 18- 6 13- 6 MIN. QNH PRESSURE IN HPA 1009.7 1011.5 1010.1 1002.0 1006.4 1001.2 1003.4 1002.0 1007.9 1011.8 1014.1 1009.9 1001.2 DAY-HOUR 22-12 4-12 23-12 4- 9 6-12 22-12 22-12 9-12 10-12 12-12 26-12 22-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.8 860.9 859.4 857.5 856.0 853.5 853.0 852.7 857.6 860.9 862.2 860.9 857.9 MAX. QFE PRESSURE IN HPA 863.7 866.2 865.4 862.8 860.1 856.6 855.2 857.0 860.8 863.4 865.8 864.5 866.2 DAY 7 2 13 2 10 6 3 30 21 9 19 13 MIN. QFE PRESSURE IN HPA 856.2 857.0 856.2 851.5 853.1 849.0 851.0 849.8 855.0 858.7 859.9 855.9 849.0 DAY 22 16 23 4 21 22 22 9 10 20 15 25 MEAN QNH PRESSURE IN HPA 1017.8 1017.9 1016.2 1014.0 1012.3 1009.4 1008.8 1008.4 1014.1 1017.9 1019.3 1017.9 1014.5 MAX. QNH PRESSURE IN HPA 1021.1 1024.0 1023.0 1020.1 1017.0 1013.0 1011.4 1013.4 1017.8 1020.7 1023.5 1022.0 1024.0 DAY 7 2 13 2 10 6 3 30 21 9 19 13 MIN. QNH PRESSURE IN HPA 1012.5 1013.4 1012.5 1007.1 1008.9 1004.2 1006.5 1005.2 1011.1 1015.4 1016.7 1012.1 1004.2 DAY 22 16 23 4 21 22 22 9 10 20 15 25 MEAN QFF PRESSURE IN HPA 1016.8 1015.6 1010.9 1005.1 999.9 995.7 995.0 995.2 1003.7 1010.1 1015.4 1016.2 1006.6 MAX. QFF PRESSURE IN HPA 1023.5 1024.5 1020.9 1013.6 1004.6 1000.3 997.4 1000.6 1008.9 1013.7 1021.2 1023.7 1024.5 DAY 27 2 12 2 16 25 31 30 21 26 19 31 MIN. QFF PRESSURE IN HPA 1008.0 1006.7 1003.5 995.8 996.0 989.5 991.9 990.5 999.0 1006.7 1011.6 1007.2 989.5 DAY 13 28 22 4 21 22 26 9 1 13 14 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.9 862.0 860.5 858.1 856.5 853.7 853.1 853.0 858.1 861.6 863.2 862.1 858.6 MAX. QFE PRESSURE IN HPA 865.1 867.3 866.3 863.3 861.1 856.7 855.3 857.4 861.0 864.1 867.0 865.9 867.3 DAY 7 2 13 1 10 6 3 30 30 9 18 13 MIN. QFE PRESSURE IN HPA 856.7 858.3 856.9 850.8 853.3 849.2 851.2 849.9 855.2 859.2 860.7 856.8 849.2 DAY 22 4 23 4 21 22 22 9 10 20 26 25 MEAN QNH PRESSURE IN HPA 1019.0 1019.2 1017.4 1014.7 1012.8 1009.7 1009.0 1008.8 1014.7 1018.7 1020.5 1019.2 1015.3 MAX. QNH PRESSURE IN HPA 1022.7 1025.2 1024.1 1020.6 1018.1 1013.1 1011.5 1013.9 1018.0 1021.5 1024.9 1023.6 1025.2 DAY 7 2 13 1 10 6 3 30 30 9 18 13 MIN. QNH PRESSURE IN HPA 1013.1 1014.9 1013.3 1006.3 1009.2 1004.5 1006.8 1005.3 1011.4 1015.9 1017.6 1013.2 1004.5 DAY 22 4 23 4 21 22 22 9 10 20 26 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.7 860.3 858.8 856.7 855.0 852.4 851.7 851.3 856.4 859.6 861.1 859.9 856.9 MAX. QFE PRESSURE IN HPA 862.3 865.5 864.3 862.3 859.3 855.7 854.3 855.6 859.1 862.4 864.9 864.4 865.5 DAY 7 2 11 1 10 5 3 29 29 26 18 13 MIN. QFE PRESSURE IN HPA 854.6 856.6 855.3 847.0 852.6 847.8 849.5 848.0 853.6 856.8 858.3 854.3 847.0 DAY 22 4 23 4 13 22 22 17 10 12 26 22 MEAN QNH PRESSURE IN HPA 1016.5 1017.2 1015.5 1013.0 1011.1 1008.2 1007.3 1006.9 1012.7 1016.4 1018.1 1016.7 1013.3 MAX. QNH PRESSURE IN HPA 1019.5 1023.1 1021.8 1019.5 1016.0 1011.9 1010.3 1011.8 1015.8 1019.6 1022.5 1021.9 1023.1 DAY 7 2 11 1 10 5 3 29 29 26 18 13 MIN. QNH PRESSURE IN HPA 1010.7 1013.0 1011.5 1002.0 1008.4 1002.9 1004.8 1003.1 1009.5 1013.2 1014.9 1010.3 1002.0 DAY 22 4 23 4 13 22 22 17 10 12 26 22 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 858.9 859.0 857.5 855.2 853.4 850.9 850.4 849.9 855.1 858.5 860.1 859.0 855.7 MAX. QFE PRESSURE IN HPA 861.9 864.2 862.7 861.2 857.7 854.6 852.6 854.4 858.6 861.1 864.0 863.7 864.2 DAY 6 2 11 1 10 5 3 29 20 26 18 13 MIN. QFE PRESSURE IN HPA 853.8 855.3 854.1 849.0 850.9 846.3 848.3 847.0 852.2 855.6 857.6 853.9 846.3 DAY 22 4 23 4 6 22 22 9 10 12 26 22 MEAN QNH PRESSURE IN HPA 1015.5 1015.7 1013.9 1011.4 1009.3 1006.5 1005.8 1005.2 1011.3 1015.1 1016.9 1015.8 1011.9 MAX. QNH PRESSURE IN HPA 1019.0 1021.7 1019.9 1018.2 1014.2 1010.7 1008.4 1010.4 1015.2 1018.1 1021.4 1021.1 1021.7 DAY 6 2 11 1 10 5 3 29 20 26 18 13 MIN. QNH PRESSURE IN HPA 1009.7 1011.5 1010.1 1004.2 1006.4 1001.2 1003.4 1002.0 1007.9 1011.8 1014.1 1009.9 1001.2 DAY 22 4 23 4 6 22 22 9 10 12 26 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 860.0 860.0 858.3 855.7 853.9 851.3 850.9 850.7 856.0 859.5 861.2 860.2 856.5 MAX. QFE PRESSURE IN HPA 862.5 864.9 864.1 862.3 857.7 855.0 853.3 855.2 859.4 861.8 865.3 864.4 865.3 DAY 2 2 12 1 10 5 3 29 30 10 18 13 MIN. QFE PRESSURE IN HPA 854.9 856.9 854.7 850.8 851.0 846.9 849.2 847.7 853.1 856.7 858.5 855.2 846.9 DAY 22 4 23 4 20 22 26 9 10 12 6 22 MEAN QNH PRESSURE IN HPA 1016.9 1016.8 1014.9 1011.9 1009.9 1006.8 1006.4 1006.2 1012.3 1016.3 1018.2 1017.0 1012.8 MAX. QNH PRESSURE IN HPA 1019.7 1022.5 1021.5 1019.5 1014.2 1011.1 1009.2 1011.4 1016.2 1018.9 1022.9 1021.9 1022.9 DAY 2 2 12 1 10 5 3 29 30 10 18 13 MIN. QNH PRESSURE IN HPA 1011.0 1013.3 1010.8 1006.3 1006.5 1001.8 1004.5 1002.8 1008.9 1013.1 1015.1 1011.4 1001.8 DAY 22 4 23 4 20 22 26 9 10 12 6 22 MEAN QFF PRESSURE IN HPA 1015.9 1014.6 1009.5 1002.9 997.5 993.1 992.6 993.0 1001.9 1008.4 1014.3 1015.4 1004.9 MAX. QFF PRESSURE IN HPA 1022.5 1023.2 1019.8 1013.2 1002.3 997.5 995.1 998.5 1007.7 1012.6 1019.9 1023.1 1023.2 DAY 27 2 12 1 15 1 31 29 30 31 18 5 MIN. QFF PRESSURE IN HPA 1007.9 1007.8 1003.4 996.8 993.6 987.2 989.7 988.3 997.8 1004.8 1010.4 1006.3 987.2 DAY 22 28 29 4 20 20 25 9 17 12 3 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.5 14.7 18.4 24.7 27.8 33.4 32.6 31.7 28.0 23.5 16.0 12.0 22.8 MINIMUN AIR TEMPERATURE (C) 3.0 7.6 10.0 14.2 18.5 23.7 23.5 21.5 16.6 11.7 6.1 2.3 13.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 8 27 30 14 1 0 0 0 80 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 0 3 4 DAYS WITH FREEZING MIN.<= 0 8 2 2 0 0 0 0 0 0 0 0 13 25 TEMPERATURE RECORDS LOWEST(C) -7.6 -1.4 -1.0 9.0 10.0 18.8 20.4 18.4 9.2 7.0 0.4 -8.2 -8.2 DAY 1 2 4 20 4 25 9 9 29 17 19 14 MAXIMUM AIR TEMPERATURE (C) 16.7 19.1 23.4 29.7 32.6 38.1 37.9 36.8 33.5 29.3 21.7 17.8 28.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 15 26 30 31 31 27 8 0 0 168 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.5 22.8 28.0 34.8 35.6 40.6 41.2 40.4 36.8 33.5 29.6 23.6 41.2 DAY 14 25 26 29 19 6 2 1 11 5 1 6 DIF. BETWEEN (MAX.-MIN.) (C) 13.7 11.5 13.4 15.5 14.1 14.4 14.4 15.3 16.9 17.6 15.6 15.5 14.8 MEAN DAILY TEMP. (MDT) (C) 9.9 13.4 16.7 22.0 25.5 30.9 30.7 29.1 25.0 20.5 13.9 10.1 20.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.0 42.8 148.0 296.9 300.2 251.8 125.0 19.8 0.0 0.0 1185.6 HEATING DEG. DAYS(BASE 18 0C) 251.9 129.6 64.8 0.1 1.0 0.0 0.0 0.0 0.0 1.6 129.3 246.6 824.8 DEWPOINT (MEAN C) -2.9 -0.1 -2.6 0.3 -1.1 0.8 8.5 1.3 -2.3 -2.5 -7.1 -6.2 -1.2 MIXING RATIO (G/KG) 3.89 4.78 4.17 4.76 4.34 4.94 9.15 5.37 4.04 3.91 3.04 3.16 4.63 VAPOUR PRESSURE (HPA) 5.34 6.54 5.71 6.51 5.93 6.71 12.28 7.27 5.51 5.37 4.19 4.35 6.31 SATURATION DEF. (HPA) 8.86 10.87 16.72 25.88 32.70 45.75 38.13 40.63 33.84 25.05 15.21 10.90 25.38 RELATIVE HUMIDITY (MEAN %) 42 40 27 23 16 14 28 17 15 20 23 31 25 RELATIVE HUMIDITY (MAX. %) 66 60 45 37 25 21 46 29 24 32 38 50 39 RELATIVE HUMIDITY (MIN. %) 28 27 17 15 11 9 16 10 10 12 14 21 16 RELATIVE HUMIDITY (MEAN% 03UTC) 63 58 43 37 25 20 45 29 24 32 38 49 39 RELATIVE HUMIDITY (MEAN% 09UTC) 32 31 20 17 13 10 20 12 11 14 17 23 18 RELATIVE HUMIDITY (MEAN% 15UTC) 40 36 24 20 14 12 24 13 13 18 22 27 22 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 15.6 14.4 15.0 2.0 0.2 0.0 1.6 0.0 0.0 0.0 0.0 0.0 48.8 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH PRECIPITATION >= 5 1 2 2 0 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 1 4 4 4 2 0 0 0 0 0 0 0 0 14 DAYS WITH PRECIPITATION 7 5 4 2 1 0 4 0 0 0 0 1 24 GREATEST DAILY PRECIPITATION 6.0 5.0 7.0 1.0 0.2 0.0 0.7 0.0 0.0 0.0 0.0 0.0 7.0 DAY 25 16 24 11 29 ** 19 ** ** ** ** ** DAY WITH THUNDER STORM 0 0 2 0 0 0 2 0 0 2 0 0 6 DAYS WITH SNOW OR SLEET 0 0 0 0 1 0 0 0 0 0 0 0 1 DAYS WITH DUST 1 12 8 7 6 10 10 13 6 2 3 2 80 WIND DIRECTION (PREVAILING) 180 225 270 270 45 45 45 45 45 315 270 315 270 PREVAILING WIND SPEED(KNOTS) 11.1 14.2 11.5 12.3 9.2 10.7 10.6 10.4 9.3 8.1 10.0 8.0 11.7 PREVAILING WIND PERCENT 20.6 21.4 20.0 16.7 18.7 33.3 21.9 23.9 23.3 19.4 12.0 14.2 14.0 CALMS PERCENT OF WIND 32.9 19.3 26.5 26.7 18.1 28.0 23.9 23.9 28.0 36.8 36.0 40.6 28.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 212 235 231 251 313 9 47 337 335 321 262 255 286 VECTOR WIND MAGNITUDE(KNOTS) 3.7 6.1 4.0 2.2 3.0 4.2 2.1 4.6 3.6 1.9 2.0 2.3 1.8 WIND STEADINESES (MEAN %) 55.2 61.6 50.0 31.0 38.5 56.8 30.4 56.1 52.2 35.2 34.5 42.6 25.4 WIND SPEED (MEAN KNOTS) 6.7 9.9 8.0 7.1 7.8 7.4 6.9 8.2 6.9 5.4 5.8 5.4 7.1 FASTEST WIND DIRECTION 200 210 150 250 300 320 40 300 310 310 200 270 210 FASTEST WIND SPEED (KNOTS) 25 29 25 27 27 23 25 27 27 21 19 19 29 DAY 30 21 12 1 28 23 23 4 28 9 2 12 DAYS WITH SKY CLEAR (0-2)/8 15 11 20 17 30 27 19 29 30 30 22 22 272 DAYS WITH P.CLOUDY (3-6)/8 12 15 5 11 1 3 12 2 0 1 8 9 79 DAYS WITH CLOUDY (7-8)/8 4 2 6 2 0 0 0 0 0 0 0 0 14 DAYS WITH VISIBILITY =< 2 KM 0 0 2 0 4 1 5 2 2 1 1 2 20 DURATION OF SUNSHINE HOURS 237.8 206.3 269.5 289.4 321.6 313.2 292.6 341.4 323.8 306.1 263.2 255.9 3420.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 860.9 858.1 858.7 857.9 856.3 851.7 849.7 852.3 855.6 860.3 861.7 862.2 857.1 MAX. QFE PRESSURE IN HPA 867.2 865.2 866.6 865.2 861.4 858.7 854.5 855.6 861.9 866.2 869.9 866.8 869.9 DAY-HOUR 12- 6 3- 6 3- 6 7- 6 10- 6 1- 3 3- 3 23- 6 26- 6 29- 6 25- 6 13- 6 MIN. QFE PRESSURE IN HPA 855.5 848.1 853.5 853.3 851.6 845.4 845.7 847.9 851.0 855.5 856.5 857.0 845.4 DAY-HOUR 25-12 17-12 29-12 13-12 24-12 30-12 25-12 1-12 3-12 6-12 14-12 11-12 MEAN QNH PRESSURE IN HPA 1017.8 1014.6 1015.3 1014.5 1012.6 1007.3 1005.0 1008.0 1011.8 1017.1 1018.7 1019.3 1013.5 MAX. QNH PRESSURE IN HPA 1025.1 1022.8 1024.4 1022.8 1018.5 1015.4 1010.5 1011.8 1019.0 1024.0 1028.2 1024.6 1028.2 DAY-HOUR 12- 6 3- 6 3- 6 7- 6 10- 6 1- 3 3- 3 23- 6 26- 6 29- 6 25- 6 13- 6 MIN. QNH PRESSURE IN HPA 1011.7 1003.2 1009.4 1009.2 1007.2 1000.1 1000.5 1003.0 1006.5 1011.7 1012.8 1013.4 1000.1 DAY-HOUR 25-12 17-12 29-12 13-12 24-12 30-12 25-12 1-12 3-12 6-12 14-12 11-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 861.2 858.3 859.0 858.6 857.4 853.0 850.8 853.4 856.6 861.1 862.4 862.7 857.9 MAX. QFE PRESSURE IN HPA 865.8 863.9 865.4 864.2 861.1 858.7 854.5 855.5 861.2 865.3 868.4 865.7 868.4 DAY 13 3 3 7 10 1 3 23 27 29 25 13 MIN. QFE PRESSURE IN HPA 857.1 851.1 854.0 854.2 853.7 848.5 847.8 850.5 853.8 857.3 857.5 859.3 847.8 DAY 29 17 1 18 24 30 26 1 2 6 15 11 MEAN QNH PRESSURE IN HPA 1018.3 1014.9 1015.7 1015.3 1013.8 1008.8 1006.3 1009.3 1013.0 1018.1 1019.6 1020.0 1014.4 MAX. QNH PRESSURE IN HPA 1023.5 1021.3 1023.0 1021.7 1018.1 1015.4 1010.5 1011.7 1018.2 1022.9 1026.5 1023.4 1026.5 DAY 13 3 3 7 10 1 3 23 27 29 25 13 MIN. QNH PRESSURE IN HPA 1013.5 1006.7 1010.0 1010.2 1009.6 1003.7 1002.9 1006.0 1009.7 1013.8 1014.0 1016.0 1002.9 DAY 29 17 1 18 24 30 26 1 2 6 15 11 MEAN QFF PRESSURE IN HPA 1016.9 1011.1 1010.1 1006.4 1003.0 995.0 992.3 996.4 1002.7 1010.8 1016.1 1018.8 1006.6 MAX. QFF PRESSURE IN HPA 1023.6 1020.2 1024.7 1013.6 1009.8 1002.6 996.7 999.8 1009.0 1015.8 1026.1 1028.7 1028.7 DAY 13 3 3 7 3 1 19 29 27 29 25 14 MIN. QFF PRESSURE IN HPA 1008.7 1002.2 1002.9 1002.0 996.2 989.4 989.1 991.3 998.3 1004.1 1007.4 1012.2 989.1 DAY 30 17 30 18 24 30 25 1 12 6 15 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 862.5 859.5 860.1 859.4 857.8 853.0 850.9 853.6 857.1 861.8 863.3 863.8 858.6 MAX. QFE PRESSURE IN HPA 867.2 865.2 866.6 865.2 861.4 858.4 854.4 855.6 861.9 866.2 869.9 866.8 869.9 DAY 12 3 3 7 10 1 3 23 26 29 25 13 MIN. QFE PRESSURE IN HPA 858.1 851.5 855.7 855.5 853.7 848.2 847.9 850.6 854.2 858.0 858.9 860.4 847.9 DAY 29 17 29 18 24 30 26 1 5 6 15 11 MEAN QNH PRESSURE IN HPA 1019.7 1016.3 1017.0 1016.2 1014.3 1008.9 1006.5 1009.6 1013.5 1018.9 1020.6 1021.2 1015.2 MAX. QNH PRESSURE IN HPA 1025.1 1022.8 1024.4 1022.8 1018.5 1015.0 1010.4 1011.8 1019.0 1024.0 1028.2 1024.6 1028.2 DAY 12 3 3 7 10 1 3 23 26 29 25 13 MIN. QNH PRESSURE IN HPA 1014.7 1007.1 1011.9 1011.7 1009.6 1003.3 1003.0 1006.1 1010.2 1014.6 1015.6 1017.3 1003.0 DAY 29 17 29 18 24 30 26 1 5 6 15 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 860.5 858.0 858.7 858.0 856.4 851.6 849.7 852.2 855.4 859.8 861.2 861.6 856.9 MAX. QFE PRESSURE IN HPA 865.2 862.9 865.5 864.0 859.4 857.5 852.6 854.3 860.7 863.5 867.3 864.4 867.3 DAY 12 3 3 7 10 1 2 23 26 29 25 13 MIN. QFE PRESSURE IN HPA 856.7 849.8 854.6 854.7 853.1 846.9 846.9 849.4 852.3 856.7 857.3 858.0 846.9 DAY 1 17 29 14 24 30 25 1 3 6 15 11 MEAN QNH PRESSURE IN HPA 1017.4 1014.6 1015.3 1014.6 1012.7 1007.3 1005.0 1007.9 1011.6 1016.6 1018.2 1018.7 1013.3 MAX. QNH PRESSURE IN HPA 1022.8 1020.2 1023.1 1021.4 1016.2 1014.0 1008.4 1010.3 1017.6 1020.9 1025.2 1021.9 1025.2 DAY 12 3 3 7 10 1 2 23 26 29 25 13 MIN. QNH PRESSURE IN HPA 1013.1 1005.2 1010.7 1010.8 1008.9 1001.8 1001.8 1004.7 1008.0 1013.1 1013.8 1014.6 1001.8 DAY 1 17 29 14 24 30 25 1 3 6 15 11 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 859.6 856.9 857.4 856.5 854.8 850.2 848.2 850.8 854.0 858.8 860.2 860.9 855.7 MAX. QFE PRESSURE IN HPA 863.9 861.8 864.4 862.3 858.2 855.6 851.3 852.5 859.1 862.1 866.3 863.9 866.3 DAY 12 3 3 7 10 1 3 23 26 29 25 23 MIN. QFE PRESSURE IN HPA 855.5 848.1 853.5 853.3 851.6 845.4 845.7 847.9 851.0 855.5 856.5 857.0 845.4 DAY 25 17 29 13 24 30 25 1 3 6 14 11 MEAN QNH PRESSURE IN HPA 1016.4 1013.2 1013.9 1012.9 1010.9 1005.7 1003.4 1006.3 1009.9 1015.5 1017.1 1017.8 1011.9 MAX. QNH PRESSURE IN HPA 1021.3 1018.9 1021.9 1019.5 1014.8 1011.8 1006.9 1008.3 1015.8 1019.3 1024.1 1021.3 1024.1 DAY 12 3 3 7 10 1 3 23 26 29 25 23 MIN. QNH PRESSURE IN HPA 1011.7 1003.2 1009.4 1009.2 1007.2 1000.1 1000.5 1003.0 1006.5 1011.7 1012.8 1013.4 1000.1 DAY 25 17 29 13 24 30 25 1 3 6 14 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 860.6 857.6 858.1 857.0 855.3 850.7 848.8 851.4 854.9 859.8 861.3 862.0 856.5 MAX. QFE PRESSURE IN HPA 865.1 862.9 864.4 863.0 859.0 856.1 853.2 853.1 859.9 863.0 867.6 864.9 867.6 DAY 12 3 3 7 10 1 18 23 26 14 25 12 MIN. QFE PRESSURE IN HPA 856.6 848.6 854.0 853.6 852.3 846.4 846.0 848.9 851.6 856.6 857.2 858.4 846.0 DAY 24 17 17 14 24 20 26 19 10 5 14 11 MEAN QNH PRESSURE IN HPA 1017.6 1014.1 1014.7 1013.4 1011.5 1006.2 1004.0 1006.9 1011.0 1016.6 1018.4 1019.2 1012.8 MAX. QNH PRESSURE IN HPA 1022.7 1020.2 1021.9 1020.3 1015.7 1012.4 1009.1 1008.9 1016.7 1020.3 1025.6 1022.5 1025.6 DAY 12 3 3 7 10 1 18 23 26 14 25 12 MIN. QNH PRESSURE IN HPA 1013.0 1003.8 1010.0 1009.5 1008.0 1001.3 1000.8 1004.1 1007.2 1013.0 1013.6 1015.0 1000.8 DAY 24 17 17 14 24 20 26 19 10 5 14 11 MEAN QFF PRESSURE IN HPA 1016.1 1010.2 1009.0 1004.4 1000.6 992.4 990.2 994.2 1000.7 1009.3 1014.9 1018.1 1005.0 MAX. QFF PRESSURE IN HPA 1022.1 1018.9 1023.7 1012.2 1009.1 999.5 997.0 996.9 1008.6 1013.9 1025.8 1027.6 1027.6 DAY 3 3 3 7 2 1 18 28 29 14 24 14 MIN. QFF PRESSURE IN HPA 1009.3 999.8 1002.1 999.7 995.3 986.7 986.5 990.5 995.8 1003.1 1007.1 1010.8 986.5 DAY 29 17 28 14 24 30 26 1 10 5 14 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.8 15.3 21.1 24.5 29.8 33.0 32.5 32.1 27.8 22.4 18.5 11.9 23.4 MINIMUN AIR TEMPERATURE (C) 4.6 5.1 10.1 15.5 19.3 22.1 22.4 20.6 17.1 11.6 7.7 4.3 13.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 3 6 19 25 14 2 0 0 0 69 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 7 5 0 0 0 0 0 0 0 0 0 4 16 TEMPERATURE RECORDS LOWEST(C) -4.4 -1.8 4.2 10.4 11.0 16.6 17.0 16.4 12.4 4.6 3.0 -2.6 -4.4 DAY 22 1 3 30 1 8 10 19 25 10 30 31 MAXIMUM AIR TEMPERATURE (C) 16.6 21.0 26.6 29.2 34.3 37.8 37.4 37.4 33.1 27.9 24.0 16.4 28.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 4 7 31 30 31 31 25 8 0 0 167 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 25.6 32.0 33.8 37.6 40.0 39.6 41.6 36.4 31.8 26.8 21.6 41.6 DAY 11 23 8 25 25 5 26 14 8 12 20 15 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 15.9 16.5 13.7 15.0 15.7 15.0 16.8 16.0 16.3 16.3 12.1 15.1 MEAN DAILY TEMP. (MDT) (C) 10.6 13.1 18.3 22.3 26.8 29.9 29.9 29.0 25.1 19.7 15.8 10.4 20.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 6.9 44.8 179.8 268.3 276.6 247.1 123.1 12.6 0.0 0.0 1159.5 HEATING DEG. DAYS(BASE 18 0C) 230.0 145.7 31.7 0.0 0.0 0.0 0.0 0.0 0.0 13.0 65.1 235.9 721.3 DEWPOINT (MEAN C) -0.6 -6.3 -6.6 -2.4 -0.9 -0.9 2.8 0.6 -0.4 -1.9 -0.1 -1.7 -1.5 MIXING RATIO (G/KG) 4.52 2.94 2.95 3.99 4.35 4.36 5.76 5.10 4.63 4.07 4.61 4.23 4.29 VAPOUR PRESSURE (HPA) 6.20 4.04 4.06 5.46 5.93 5.93 7.80 6.92 6.32 5.60 6.33 5.80 5.87 SATURATION DEF. (HPA) 8.41 14.42 22.39 26.20 37.01 45.53 42.33 42.47 32.44 22.74 15.98 9.06 26.58 RELATIVE HUMIDITY (MEAN %) 46 25 17 19 15 12 17 15 17 21 31 44 23 RELATIVE HUMIDITY (MAX. %) 69 45 31 31 23 18 26 23 25 32 49 63 36 RELATIVE HUMIDITY (MIN. %) 32 15 11 12 10 8 11 9 12 14 21 33 16 RELATIVE HUMIDITY (MEAN% 03UTC) 68 44 31 31 22 18 26 22 24 31 49 62 36 RELATIVE HUMIDITY (MEAN% 09UTC) 35 19 12 15 12 10 12 11 13 16 23 36 18 RELATIVE HUMIDITY (MEAN% 15UTC) 43 20 14 16 13 11 16 13 17 21 27 41 21 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 13.1 0.0 0.0 0.0 3.0 0.0 1.0 0.0 0.0 0.0 0.0 106.0 123.1 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 2 2 DAYS WITH PRECIPITATION >= 5 1 0 0 0 0 0 0 0 0 0 0 3 4 DAYS WITH PRECIPITATION >= 1 4 0 0 0 1 0 0 0 0 0 0 4 9 DAYS WITH PRECIPITATION 6 0 0 0 2 0 2 0 0 1 0 4 15 GREATEST DAILY PRECIPITATION 7.0 0.0 0.0 0.0 3.0 0.0 0.5 0.0 0.0 0.0 0.0 81.0 81.0 DAY 27 ** ** ** 6 ** 12 ** ** ** ** 27 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH DUST 2 6 7 16 9 12 16 15 7 5 3 1 99 WIND DIRECTION (PREVAILING) 180 225 180 270 45 45 45 45 45 315 225 180 45 PREVAILING WIND SPEED(KNOTS) 9.8 14.1 11.2 13.5 10.5 11.4 10.9 11.6 10.6 7.3 8.5 10.6 10.6 PREVAILING WIND PERCENT 18.1 12.4 14.2 18.7 20.6 29.3 30.3 27.1 26.7 21.9 14.7 17.4 15.8 CALMS PERCENT OF WIND 29.7 33.8 27.1 15.3 15.5 22.0 15.5 18.7 20.7 25.2 29.3 27.7 23.3 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 228 232 234 267 315 359 353 354 16 336 242 224 305 VECTOR WIND MAGNITUDE(KNOTS) 3.2 2.8 2.1 4.2 1.1 3.8 4.6 5.3 3.9 2.1 2.5 2.7 1.7 WIND STEADINESES (MEAN %) 47.1 40.6 29.6 45.2 13.3 46.3 49.5 57.0 53.4 30.9 41.0 37.5 22.1 WIND SPEED (MEAN KNOTS) 6.8 6.9 7.1 9.3 8.3 8.2 9.3 9.3 7.3 6.8 6.1 7.2 7.7 FASTEST WIND DIRECTION 210 220 30 280 290 300 300 340 10 40 290 270 290 FASTEST WIND SPEED (KNOTS) 19 23 21 23 35 27 27 27 21 23 23 21 35 DAY 26 3 24 12 6 7 9 1 25 7 24 31 DAYS WITH SKY CLEAR (0-2)/8 16 20 24 20 29 28 27 29 28 30 23 19 293 DAYS WITH P.CLOUDY (3-6)/8 13 9 6 10 2 2 4 0 2 1 7 6 62 DAYS WITH CLOUDY (7-8)/8 2 0 1 0 0 0 0 2 0 0 0 6 11 DAYS WITH VISIBILITY =< 2 KM 1 1 2 3 3 2 3 6 2 1 1 3 28 DURATION OF SUNSHINE HOURS 226.6 270.8 303.5 299.2 334.2 321.4 336.7 331.9 314.4 301.9 275.7 222.6 3538.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 858.9 860.2 859.6 856.7 854.7 852.2 851.1 851.7 856.9 861.6 861.7 860.7 857.2 MAX. QFE PRESSURE IN HPA 864.7 865.8 865.6 861.1 859.5 858.6 854.7 855.9 862.5 865.5 865.4 869.0 869.0 DAY-HOUR 1- 6 11- 6 6- 6 4- 6 28- 3 2- 6 16- 6 23- 6 26- 6 27- 6 29- 6 4- 6 MIN. QFE PRESSURE IN HPA 853.2 854.7 853.3 851.0 849.1 845.9 847.4 847.3 850.5 857.2 856.7 852.6 845.9 DAY-HOUR 28-12 18-12 31-12 18- 3 13-15 18-12 11-12 3-12 11-12 2-12 24- 9 21-12 MEAN QNH PRESSURE IN HPA 1015.6 1017.1 1016.4 1013.1 1010.8 1007.9 1006.7 1007.3 1013.3 1018.7 1018.7 1017.6 1013.6 MAX. QNH PRESSURE IN HPA 1022.2 1023.5 1023.3 1018.1 1016.3 1015.2 1010.8 1012.1 1019.7 1023.1 1023.0 1027.2 1027.2 DAY-HOUR 1- 6 11- 6 6- 6 4- 6 28- 3 2- 6 16- 6 23- 6 26- 6 27- 6 29- 6 4- 6 MIN. QNH PRESSURE IN HPA 1009.1 1010.8 1009.2 1006.5 1004.4 1000.7 1002.4 1002.3 1006.0 1013.6 1013.1 1008.4 1000.7 DAY-HOUR 28-12 18-12 31-12 18- 3 13-15 18-12 11-12 3-12 11-12 2-12 24- 9 21-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.4 860.7 860.4 857.4 855.9 853.5 852.4 852.8 857.9 862.5 862.5 861.1 858.0 MAX. QFE PRESSURE IN HPA 863.8 865.5 863.9 860.7 859.5 858.5 854.5 855.6 862.3 865.1 864.7 868.1 868.1 DAY 1 11 6 4 28 2 17 31 27 27 29 4 MIN. QFE PRESSURE IN HPA 854.9 856.6 856.0 851.0 851.7 848.4 850.2 850.4 853.6 859.4 859.0 853.8 848.4 DAY 28 19 31 18 15 18 28 3 12 3 24 27 MEAN QNH PRESSURE IN HPA 1016.1 1017.7 1017.3 1013.9 1012.2 1009.3 1008.1 1008.6 1014.5 1019.7 1019.8 1018.1 1014.6 MAX. QNH PRESSURE IN HPA 1021.2 1023.1 1021.3 1017.6 1016.3 1015.1 1010.5 1011.8 1019.5 1022.7 1022.2 1026.1 1026.1 DAY 1 11 6 4 28 2 17 31 27 27 29 4 MIN. QNH PRESSURE IN HPA 1011.0 1013.0 1012.3 1006.5 1007.3 1003.6 1005.6 1005.8 1009.5 1016.2 1015.7 1009.7 1003.6 DAY 28 19 31 18 15 18 28 3 12 3 24 27 MEAN QFF PRESSURE IN HPA 1014.1 1014.5 1010.9 1004.8 1000.3 995.9 994.7 995.7 1004.2 1012.8 1015.0 1016.1 1006.6 MAX. QFF PRESSURE IN HPA 1023.2 1023.4 1016.2 1010.4 1004.7 1002.5 997.7 1000.4 1011.4 1016.7 1019.3 1025.4 1025.4 DAY 1 11 7 4 1 2 17 31 27 30 30 4 MIN. QFF PRESSURE IN HPA 1006.7 1008.4 1003.0 995.6 995.1 989.3 991.5 992.1 998.1 1006.3 1009.7 1005.0 989.3 DAY 15 8 31 18 13 18 28 16 12 7 24 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 860.5 861.8 861.3 858.2 856.2 853.5 852.4 853.1 858.4 863.2 863.3 862.2 858.7 MAX. QFE PRESSURE IN HPA 864.7 865.8 865.6 861.1 859.2 858.6 854.7 855.9 862.5 865.5 865.4 869.0 869.0 DAY 1 11 6 4 28 2 16 23 26 27 29 4 MIN. QFE PRESSURE IN HPA 856.4 857.6 856.6 854.9 852.2 848.8 849.7 850.7 854.1 860.2 859.3 854.3 848.8 DAY 28 19 31 16 14 18 28 1 11 6 24 27 MEAN QNH PRESSURE IN HPA 1017.4 1018.9 1018.4 1014.7 1012.5 1009.4 1008.1 1008.9 1015.0 1020.5 1020.6 1019.4 1015.3 MAX. QNH PRESSURE IN HPA 1022.2 1023.5 1023.3 1018.1 1015.9 1015.2 1010.8 1012.1 1019.7 1023.1 1023.0 1027.2 1027.2 DAY 1 11 6 4 28 2 16 23 26 27 29 4 MIN. QNH PRESSURE IN HPA 1012.7 1014.1 1013.0 1011.0 1007.9 1004.0 1005.0 1006.2 1010.1 1017.1 1016.0 1010.3 1004.0 DAY 28 19 31 16 14 18 28 1 11 6 24 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 858.6 860.1 859.7 856.9 854.8 852.1 851.0 851.6 856.7 861.1 861.2 860.3 857.0 MAX. QFE PRESSURE IN HPA 862.4 864.7 863.5 860.4 857.9 857.0 853.2 854.1 860.7 863.2 863.5 866.9 866.9 DAY 1 10 6 4 3 2 16 22 30 25 3 4 MIN. QFE PRESSURE IN HPA 853.8 855.6 855.2 853.6 850.9 847.4 848.6 848.9 851.8 858.4 856.7 853.3 847.4 DAY 28 19 31 18 14 18 28 3 11 2 24 21 MEAN QNH PRESSURE IN HPA 1015.2 1017.0 1016.5 1013.3 1010.9 1007.8 1006.6 1007.2 1013.0 1018.1 1018.2 1017.2 1013.4 MAX. QNH PRESSURE IN HPA 1019.6 1022.2 1020.9 1017.3 1014.4 1013.4 1009.1 1010.1 1017.6 1020.5 1020.9 1024.8 1024.8 DAY 1 10 6 4 3 2 16 22 30 25 3 4 MIN. QNH PRESSURE IN HPA 1009.7 1011.8 1011.4 1009.5 1006.4 1002.4 1003.8 1004.1 1007.5 1015.0 1013.1 1009.2 1002.4 DAY 28 19 31 18 14 18 28 3 11 2 24 21 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 857.6 858.8 858.1 855.4 853.3 850.6 849.7 850.2 855.3 860.1 860.2 859.5 855.7 MAX. QFE PRESSURE IN HPA 861.6 864.0 861.8 858.4 856.5 855.1 851.8 852.7 859.1 862.7 862.3 865.8 865.8 DAY 11 10 6 4 3 2 16 29 27 26 29 4 MIN. QFE PRESSURE IN HPA 853.2 854.7 853.3 851.5 849.1 845.9 847.4 847.3 850.5 857.2 857.2 852.6 845.9 DAY 28 18 31 17 14 18 11 3 11 2 24 21 MEAN QNH PRESSURE IN HPA 1014.2 1015.5 1014.6 1011.5 1009.2 1006.1 1005.0 1005.6 1011.5 1017.0 1017.1 1016.2 1012.0 MAX. QNH PRESSURE IN HPA 1018.7 1021.4 1018.9 1015.0 1012.8 1011.2 1007.5 1008.5 1015.8 1019.9 1019.5 1023.5 1023.5 DAY 11 10 6 4 3 2 16 29 27 26 29 4 MIN. QNH PRESSURE IN HPA 1009.1 1010.8 1009.2 1007.1 1004.4 1000.7 1002.4 1002.3 1006.0 1013.6 1013.6 1008.4 1000.7 DAY 28 18 31 17 14 18 11 3 11 2 24 21 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 858.6 859.7 858.8 856.0 853.7 851.1 850.2 850.8 856.4 861.3 861.1 860.5 856.5 MAX. QFE PRESSURE IN HPA 863.5 865.0 862.4 859.2 856.7 855.2 852.0 853.6 861.0 863.5 863.0 866.7 866.7 DAY 10 10 6 4 28 2 16 30 26 27 29 3 MIN. QFE PRESSURE IN HPA 854.0 855.9 853.9 851.5 849.1 846.6 847.8 848.3 851.8 858.6 858.5 853.9 846.6 DAY 27 19 31 17 13 18 28 1 11 2 24 21 MEAN QNH PRESSURE IN HPA 1015.3 1016.5 1015.4 1012.3 1009.6 1006.7 1005.6 1006.3 1012.7 1018.3 1018.2 1017.4 1012.9 MAX. QNH PRESSURE IN HPA 1020.9 1022.6 1019.6 1015.9 1013.1 1011.4 1007.7 1009.5 1018.0 1020.9 1020.3 1024.5 1024.5 DAY 10 10 6 4 28 2 16 30 26 27 29 3 MIN. QNH PRESSURE IN HPA 1010.0 1012.1 1009.9 1007.1 1004.4 1001.5 1002.9 1003.4 1007.5 1015.2 1015.1 1009.9 1001.5 DAY 27 19 31 17 13 18 28 1 11 2 24 21 MEAN QFF PRESSURE IN HPA 1013.2 1013.3 1009.0 1003.3 997.6 993.2 992.1 993.4 1002.3 1011.4 1013.3 1015.5 1004.8 MAX. QFF PRESSURE IN HPA 1020.6 1022.3 1014.5 1008.4 1001.6 998.3 995.2 998.0 1008.7 1015.0 1018.7 1024.6 1024.6 DAY 1 10 23 4 3 1 17 31 27 9 30 4 MIN. QFF PRESSURE IN HPA 1006.4 1007.7 1001.4 998.4 992.3 986.9 987.7 989.5 996.8 1006.0 1009.0 1008.1 986.9 DAY 14 16 31 18 13 18 27 1 11 6 24 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.2 11.1 17.4 23.4 26.6 32.2 33.4 31.8 29.4 24.1 16.8 13.0 22.4 MINIMUN AIR TEMPERATURE (C) 2.4 5.7 10.1 13.3 17.6 21.8 23.2 20.6 18.6 13.1 7.4 2.8 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 4 19 27 14 7 0 0 0 72 DAYS WITH MINIMUM TEMP. <=-4 0 3 0 0 0 0 0 0 0 0 0 1 4 DAYS WITH FREEZING MIN.<= 0 12 5 0 0 0 0 0 0 0 0 0 4 21 TEMPERATURE RECORDS LOWEST(C) -3.4 -5.6 5.2 3.0 13.0 16.8 19.6 15.8 13.2 8.0 0.6 -4.0 -5.6 DAY 27 19 5 9 2 13 13 18 30 26 27 12 MAXIMUM AIR TEMPERATURE (C) 13.8 15.0 21.8 28.3 31.0 36.7 38.0 37.1 34.6 29.5 22.3 18.8 27.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 11 24 28 31 31 30 12 0 0 167 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.2 19.4 27.6 33.0 34.5 41.6 40.0 39.0 36.8 33.8 25.8 24.6 41.6 DAY 6 21 12 27 17 24 15 6 8 2 3 7 DIF. BETWEEN (MAX.-MIN.) (C) 11.4 9.3 11.7 15.0 13.4 14.9 14.8 16.5 16.0 16.4 14.9 16.0 14.1 MEAN DAILY TEMP. (MDT) (C) 8.1 10.4 15.9 20.8 24.3 29.2 30.6 28.9 26.6 21.3 14.8 10.8 20.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 43.0 103.5 247.3 297.4 243.6 168.5 37.5 0.0 0.0 1140.9 HEATING DEG. DAYS(BASE 18 0C) 305.7 212.8 79.2 22.0 0.0 0.0 0.0 0.0 0.0 1.4 97.6 222.2 940.8 DEWPOINT (MEAN C) -2.7 -0.8 2.3 -0.6 2.3 3.6 3.2 1.1 -0.3 -1.0 -2.4 -6.2 -0.1 MIXING RATIO (G/KG) 3.91 4.70 5.72 4.53 5.55 6.13 6.02 5.24 4.63 4.28 3.89 3.01 4.80 VAPOUR PRESSURE (HPA) 5.37 6.42 7.81 6.20 7.56 8.31 8.14 7.10 6.31 5.88 5.35 4.14 6.55 SATURATION DEF. (HPA) 6.73 7.29 13.11 24.08 28.02 41.28 44.47 41.21 36.03 25.61 14.76 11.84 24.53 RELATIVE HUMIDITY (MEAN %) 47 49 44 23 23 19 17 16 16 20 29 29 28 RELATIVE HUMIDITY (MAX. %) 74 70 67 40 36 29 27 28 25 33 46 46 43 RELATIVE HUMIDITY (MIN. %) 30 36 30 15 16 12 11 10 10 13 20 19 19 RELATIVE HUMIDITY (MEAN% 03UTC) 71 69 65 40 34 29 26 28 25 33 46 46 43 RELATIVE HUMIDITY (MEAN% 09UTC) 35 40 34 16 17 14 13 11 12 15 22 21 21 RELATIVE HUMIDITY (MEAN% 15UTC) 47 46 40 20 23 16 13 13 15 19 26 27 25 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 23.7 123.5 68.7 0.9 7.2 3.0 0.1 0.0 0.0 0.0 0.0 0.0 227.1 DAYS WITH PRECIPITATION >=10 1 5 2 0 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 5 3 5 3 0 0 0 0 0 0 0 0 0 11 DAYS WITH PRECIPITATION >= 1 4 6 6 0 2 1 0 0 0 0 0 0 19 DAYS WITH PRECIPITATION 6 8 12 3 5 2 2 0 0 0 0 0 38 GREATEST DAILY PRECIPITATION 11.0 63.0 36.0 0.6 4.0 2.4 0.1 0.0 0.0 0.0 0.0 0.0 63.0 DAY 24 14 2 20 27 12 4 ** ** ** ** ** DAY WITH THUNDER STORM 0 1 1 0 3 1 0 1 0 0 0 0 7 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 11 4 4 9 5 9 13 5 2 3 1 68 WIND DIRECTION (PREVAILING) 225 180 225 315 45 45 45 45 45 45 315 315 45 PREVAILING WIND SPEED(KNOTS) 13.6 12.8 11.9 10.7 11.8 11.0 11.0 11.9 11.6 11.5 8.5 8.3 10.9 PREVAILING WIND PERCENT 14.2 22.9 22.6 16.0 23.2 30.7 25.8 31.0 22.7 18.1 17.3 18.1 16.3 CALMS PERCENT OF WIND 31.0 14.3 18.7 19.3 11.6 13.3 15.5 11.6 24.0 36.1 30.7 39.4 22.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 233 209 223 279 357 12 341 351 360 354 271 294 314 VECTOR WIND MAGNITUDE(KNOTS) 3.4 4.6 4.3 2.3 2.4 4.8 4.2 6.4 4.2 2.0 2.2 1.8 1.8 WIND STEADINESES (MEAN %) 45.9 47.9 50.6 26.1 24.5 52.7 43.3 58.7 53.8 33.9 33.3 34.0 21.7 WIND SPEED (MEAN KNOTS) 7.4 9.6 8.5 8.8 9.8 9.1 9.7 10.9 7.8 5.9 6.6 5.3 8.3 FASTEST WIND DIRECTION 180 270 180 300 270 330 300 340 210 40 200 210 270 FASTEST WIND SPEED (KNOTS) 27 29 29 23 23 21 27 29 23 19 25 23 29 DAY 11 14 2 5 1 6 30 10 1 14 9 26 DAYS WITH SKY CLEAR (0-2)/8 20 12 14 25 16 26 24 29 29 31 26 23 275 DAYS WITH P.CLOUDY (3-6)/8 8 9 15 3 13 4 7 2 1 0 3 8 73 DAYS WITH CLOUDY (7-8)/8 3 7 2 2 2 0 0 0 0 0 1 0 17 DAYS WITH VISIBILITY =< 2 KM 2 0 1 1 1 1 1 2 0 0 0 0 9 DURATION OF SUNSHINE HOURS 246.8 188.7 255.6 300.8 289.1 339.8 330.8 353.0 303.6 313.0 272.9 260.6 3454.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.8 857.7 858.1 858.8 856.2 851.7 850.4 851.8 855.4 860.9 861.6 862.0 857.0 MAX. QFE PRESSURE IN HPA 864.7 862.8 863.3 864.0 860.1 857.7 854.6 857.2 859.5 865.5 865.5 866.8 866.8 DAY-HOUR 8- 6 1- 6 10- 6 14- 6 19- 6 6- 6 15- 3 29- 6 28- 6 29- 6 28- 6 28- 6 MIN. QFE PRESSURE IN HPA 854.6 851.2 851.3 850.0 849.6 844.2 845.6 846.1 851.0 855.9 857.5 857.2 844.2 DAY-HOUR 11- 9 6-12 24-12 30-12 6-12 28-12 5-12 7-12 11-12 3-12 9-12 19-12 MEAN QNH PRESSURE IN HPA 1016.6 1014.2 1014.6 1015.4 1012.5 1007.4 1005.9 1007.4 1011.6 1017.8 1018.7 1019.1 1013.4 MAX. QNH PRESSURE IN HPA 1022.2 1020.1 1020.6 1021.4 1017.0 1014.2 1010.7 1013.6 1016.3 1023.1 1023.1 1024.6 1024.6 DAY-HOUR 8- 6 1- 6 10- 6 14- 6 19- 6 6- 6 15- 3 29- 6 28- 6 29- 6 28- 6 28- 6 MIN. QNH PRESSURE IN HPA 1010.7 1006.8 1006.9 1005.4 1004.9 998.7 1000.3 1000.9 1006.5 1012.1 1014.0 1013.6 998.7 DAY-HOUR 11- 9 6-12 24-12 30-12 6-12 28-12 5-12 7-12 11-12 3-12 9-12 19-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.1 857.9 858.5 859.8 857.2 852.9 851.5 852.9 856.4 861.7 862.4 862.5 857.8 MAX. QFE PRESSURE IN HPA 863.7 861.6 862.1 863.2 859.7 857.1 854.6 856.4 858.8 864.6 864.7 865.2 865.2 DAY 22 1 10 14 19 6 15 29 28 29 23 28 MIN. QFE PRESSURE IN HPA 856.2 853.4 852.5 853.0 852.3 847.2 848.2 847.7 853.4 857.7 860.1 858.9 847.2 DAY 24 6 2 30 7 28 5 7 5 4 9 19 MEAN QNH PRESSURE IN HPA 1016.9 1014.5 1015.2 1016.6 1013.7 1008.7 1007.1 1008.7 1012.7 1018.8 1019.6 1019.7 1014.4 MAX. QNH PRESSURE IN HPA 1021.1 1018.7 1019.3 1020.5 1016.5 1013.5 1010.7 1012.7 1015.5 1022.1 1022.2 1022.8 1022.8 DAY 22 1 10 14 19 6 15 29 28 29 23 28 MIN. QNH PRESSURE IN HPA 1012.5 1009.3 1008.3 1008.8 1008.0 1002.2 1003.3 1002.8 1009.3 1014.2 1017.0 1015.6 1002.2 DAY 24 6 2 30 7 28 5 7 5 4 9 19 MEAN QFF PRESSURE IN HPA 1016.6 1012.3 1009.7 1008.3 1003.3 995.3 993.0 995.9 1001.5 1010.8 1015.5 1018.0 1006.7 MAX. QFF PRESSURE IN HPA 1021.5 1021.3 1015.1 1016.6 1007.6 1001.1 996.3 1000.9 1005.8 1016.5 1022.2 1022.9 1022.9 DAY 22 18 10 9 9 1 15 29 30 29 28 30 MIN. QFF PRESSURE IN HPA 1009.5 1004.3 1002.8 997.4 998.1 986.8 988.2 988.7 997.2 1004.6 1008.6 1012.2 986.8 DAY 24 5 25 30 6 28 5 8 5 4 9 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.3 859.1 859.5 860.3 857.5 853.0 851.7 853.2 856.9 862.4 863.2 863.6 858.5 MAX. QFE PRESSURE IN HPA 864.7 862.8 863.3 864.0 860.1 857.7 854.4 857.2 859.5 865.5 865.5 866.8 866.8 DAY 8 1 10 14 19 6 15 29 28 29 28 28 MIN. QFE PRESSURE IN HPA 856.7 854.6 853.9 853.1 853.2 847.0 848.2 848.1 854.2 858.7 860.4 860.3 847.0 DAY 11 6 2 30 7 28 5 7 11 4 9 19 MEAN QNH PRESSURE IN HPA 1018.3 1015.8 1016.2 1017.1 1014.0 1008.8 1007.3 1009.0 1013.3 1019.6 1020.5 1021.0 1015.1 MAX. QNH PRESSURE IN HPA 1022.2 1020.1 1020.6 1021.4 1017.0 1014.2 1010.4 1013.6 1016.3 1023.1 1023.1 1024.6 1024.6 DAY 8 1 10 14 19 6 15 29 28 29 28 28 MIN. QNH PRESSURE IN HPA 1013.1 1010.7 1009.9 1008.9 1009.1 1002.0 1003.3 1003.2 1010.2 1015.4 1017.3 1017.2 1002.0 DAY 11 6 2 30 7 28 5 7 11 4 9 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.5 857.6 858.0 858.9 856.2 851.8 850.4 851.6 855.2 860.5 861.1 861.5 856.9 MAX. QFE PRESSURE IN HPA 863.1 861.4 861.6 862.7 859.0 856.0 853.2 855.9 858.1 863.4 863.5 864.8 864.8 DAY 8 21 10 14 19 5 19 27 30 29 23 28 MIN. QFE PRESSURE IN HPA 854.6 852.5 853.3 851.3 852.1 845.9 847.2 847.0 852.4 857.1 857.7 858.1 845.9 DAY 11 6 2 30 6 28 5 7 11 3 9 19 MEAN QNH PRESSURE IN HPA 1016.3 1014.1 1014.6 1015.5 1012.5 1007.4 1005.9 1007.2 1011.4 1017.4 1018.1 1018.6 1013.2 MAX. QNH PRESSURE IN HPA 1020.4 1018.5 1018.7 1019.9 1015.7 1012.3 1009.1 1012.1 1014.7 1020.7 1020.9 1022.3 1022.3 DAY 8 21 10 14 19 5 19 27 30 29 23 28 MIN. QNH PRESSURE IN HPA 1010.7 1008.3 1009.2 1006.9 1007.8 1000.7 1002.2 1002.0 1008.1 1013.5 1014.2 1014.7 1000.7 DAY 11 6 2 30 6 28 5 7 11 3 9 19 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 858.6 856.5 856.8 857.3 854.9 850.3 849.2 850.3 853.9 859.4 860.2 860.6 855.7 MAX. QFE PRESSURE IN HPA 862.4 859.8 860.2 861.5 857.3 854.7 852.7 854.7 856.8 862.4 862.7 863.7 863.7 DAY 8 1 10 14 13 5 15 27 30 29 23 28 MIN. QFE PRESSURE IN HPA 854.6 851.2 851.3 850.0 849.6 844.2 845.6 846.1 851.0 855.9 857.5 857.2 844.2 DAY 25 6 24 30 6 28 5 7 11 3 9 19 MEAN QNH PRESSURE IN HPA 1015.2 1012.8 1013.2 1013.8 1010.9 1005.8 1004.4 1005.7 1009.9 1016.1 1017.1 1017.6 1011.9 MAX. QNH PRESSURE IN HPA 1019.6 1016.6 1017.1 1018.6 1013.8 1010.8 1008.5 1010.8 1013.2 1019.6 1019.9 1021.1 1021.1 DAY 8 1 10 14 13 5 15 27 30 29 23 28 MIN. QNH PRESSURE IN HPA 1010.7 1006.8 1006.9 1005.4 1004.9 998.7 1000.3 1000.9 1006.5 1012.1 1014.0 1013.6 998.7 DAY 25 6 24 30 6 28 5 7 11 3 9 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 859.6 857.4 857.6 857.8 855.4 850.6 849.5 851.1 854.8 860.4 861.2 861.8 856.4 MAX. QFE PRESSURE IN HPA 863.1 860.6 862.0 862.2 857.9 854.9 853.0 855.4 857.7 863.1 864.1 864.1 864.1 DAY 8 1 10 14 12 5 15 27 30 29 23 7 MIN. QFE PRESSURE IN HPA 855.4 852.3 852.6 850.7 850.6 844.6 845.8 846.7 851.7 856.6 858.0 858.6 844.6 DAY 25 5 24 30 6 28 5 6 16 4 9 18 MEAN QNH PRESSURE IN HPA 1016.4 1013.8 1014.0 1014.3 1011.6 1006.1 1004.8 1006.6 1010.8 1017.3 1018.3 1018.9 1012.7 MAX. QNH PRESSURE IN HPA 1020.4 1017.5 1019.1 1019.4 1014.4 1011.0 1008.8 1011.6 1014.2 1020.4 1021.5 1021.5 1021.5 DAY 8 1 10 14 12 5 15 27 30 29 23 7 MIN. QNH PRESSURE IN HPA 1011.6 1008.0 1008.4 1006.2 1006.1 999.2 1000.6 1001.6 1007.3 1013.0 1014.6 1015.2 999.2 DAY 25 5 24 30 6 28 5 6 16 4 9 18 MEAN QFF PRESSURE IN HPA 1015.9 1011.7 1008.5 1006.1 1001.1 992.7 990.7 993.9 999.5 1009.3 1014.2 1017.3 1005.1 MAX. QFF PRESSURE IN HPA 1020.4 1019.7 1014.2 1015.6 1004.8 998.5 994.7 999.2 1004.5 1014.7 1021.2 1022.7 1022.7 DAY 14 18 5 9 9 11 15 29 29 29 27 30 MIN. QFF PRESSURE IN HPA 1008.5 1002.7 1001.8 995.6 995.0 984.1 985.5 988.4 995.2 1002.7 1006.8 1011.7 984.1 DAY 24 5 24 30 6 28 5 6 4 4 9 26 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.4 11.8 16.1 22.4 27.7 31.2 31.8 30.5 26.9 21.6 15.8 11.5 21.4 MINIMUN AIR TEMPERATURE (C) 2.2 4.6 8.5 13.3 18.1 21.5 22.5 20.5 16.3 11.4 6.4 3.4 12.4 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.1 0.7 5.8 18.3 22.6 13.5 2.2 0.1 0.0 0.0 63.3 DAYS WITH MINIMUM TEMP. <=-4 1.8 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.1 3.5 DAYS WITH FREEZING MIN.<= 0 10.9 5.1 0.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.7 6.7 24.1 TEMPERATURE RECORDS LOWEST(C) -10.0 -7.0 -2.0 2.4 4.4 12.4 16.0 12.5 7.6 0.8 -3.6 -10.0 -10.0 YEAR-DAY 99- 5 0-11 92- 1 94- 7 89- 3 96-18 97-12 97-27 89-25 87-19 95-29 86-13 99- 5 MAXIMUM AIR TEMPERATURE (C) 15.0 17.3 21.5 28.2 33.7 37.2 37.8 36.8 33.7 28.6 22.6 17.8 27.5 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.5 11.4 27.8 29.8 30.9 30.9 28.1 10.4 0.1 0.0 169.9 DAYS WITH MAXIMUM TEMP. <= 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 TEMPERATURE RECORDS HIGHEST(C) 24.8 26.6 32.0 36.0 40.5 42.0 43.4 41.6 40.4 35.2 30.5 27.0 43.4 YEAR-DAY 87-26 0-28 4- 8 0-23 0-10 94-23 98- 8 4-14 1- 1 97- 1 1- 1 98-14 98- 8 DIF. BETWEEN (MAX.-MIN.) (C) 12.8 12.7 13.0 14.9 15.6 15.7 15.3 16.3 17.4 17.2 16.2 14.4 15.1 MEAN DAILY TEMP. (MDT) (C) 8.6 10.9 15.0 20.8 25.9 29.4 30.1 28.6 25.0 20.0 14.5 10.6 20.0 STANDARD DEVIATION OF MDT(C) 1.00 1.29 1.43 1.28 1.49 0.86 0.83 0.73 1.19 1.00 0.96 1.33 1.12 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.3 35.9 154.3 250.6 282.9 236.9 122.0 19.9 0.0 0.0 1103.8 HEATING DEG. DAYS(BASE 18 0C) 291.8 200.4 104.6 12.6 0.7 0.0 0.0 0.0 0.1 11.8 106.9 228.8 957.7 DEWPOINT (MEAN C) -2.9 -2.0 -0.3 0.4 1.6 2.4 4.5 2.1 -0.3 -1.4 -2.8 -3.0 -0.1 MIXING RATIO (G/KG) 3.95 4.23 4.79 4.89 5.32 5.74 6.93 5.63 4.72 4.28 3.96 3.98 4.87 VAPOUR PRESSURE (HPA) 5.42 5.79 6.55 6.68 7.24 7.77 9.33 7.63 6.44 5.88 5.45 5.47 6.64 SATURATION DEF. (HPA) 7.03 8.85 12.86 22.00 31.68 39.38 39.10 37.64 30.88 21.67 13.69 9.10 22.82 RELATIVE HUMIDITY (MEAN %) 48 44 39 27 21 18 21 19 19 24 32 42 29 RELATIVE HUMIDITY (MAX. %) 71 68 60 45 34 29 34 30 30 37 49 62 46 RELATIVE HUMIDITY (MIN. %) 30 27 24 16 13 11 13 11 11 15 20 27 18 RELATIVE HUMIDITY (MEAN% 03UTC) 67 65 57 42 31 26 31 28 28 35 47 60 43 RELATIVE HUMIDITY (MEAN% 09UTC) 35 32 28 19 15 13 15 13 13 16 22 31 21 RELATIVE HUMIDITY (MEAN% 15UTC) 42 37 33 22 17 15 17 15 16 22 28 36 25 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.6 34.0 36.6 5.8 2.9 1.4 2.3 1.0 0.8 2.2 3.9 26.0 150.5 DAYS WITH PRECIPITATION >=10 1.2 1.1 1.1 0.2 0.1 0.0 0.1 0.1 0.0 0.1 0.1 0.6 4.7 DAYS WITH PRECIPITATION >= 5 2.1 1.9 2.0 0.4 0.1 0.0 0.2 0.1 0.1 0.2 0.3 1.1 8.5 DAYS WITH PRECIPITATION >= 1 3.7 3.6 4.3 1.5 0.6 0.6 0.5 0.2 0.3 0.4 0.9 2.1 18.7 DAYS WITH PRECIPITATION 5.3 5.0 6.4 3.4 2.2 1.5 1.7 0.6 0.6 1.4 1.4 3.3 32.8 GREATEST DAILY PRECIPITATION 50.5 63.0 51.0 12.0 20.0 4.0 10.0 10.0 5.5 15.2 17.0 81.0 81.0 YEAR-DAY 94-25 5-14 97-17 97-27 87-31 97-21 99-14 98-24 2-20 92- 6 97-23 4-27 4 DAY WITH THUNDER STORM 0.2 0.7 1.2 1.1 1.5 1.1 1.0 0.5 0.5 1.0 0.4 0.3 9.5 DAYS WITH SNOW OR SLEET 0.2 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.5 DAYS WITH DUST 2.9 5.7 7.7 6.8 8.7 10.2 11.2 9.7 5.2 2.2 1.6 2.7 74.6 WIND DIRECTION (PREVAILING) 180 270 180 270 270 360 360 270 270 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 11.3 11.0 12.3 11.0 10.3 10.3 10.6 10.7 9.2 7.7 7.7 11.1 9.9 PREVAILING WIND PERCENT 13.4 15.9 16.4 15.3 16.1 13.9 13.6 14.5 13.5 13.1 11.9 13.0 13.7 CALMS PERCENT OF WIND 43.4 33.9 32.1 35.5 32.1 34.7 36.4 36.2 42.5 47.3 47.7 44.3 38.8 NO. OF WIND OBSERVATION 201.4 183.7 201.5 195.0 201.5 198.1 201.4 201.4 191.6 201.5 195.0 201.2 2373.3 VECTOR WIND DIRECTION (MEAN) 227 230 230 253 308 357 348 339 349 320 263 224 286 VECTOR WIND MAGNITUDE(KNOTS) 2.2 3.0 3.0 2.5 1.7 2.5 2.7 3.1 2.0 1.3 1.4 1.9 1.4 WIND STEADINESES (MEAN %) 40.0 43.5 41.7 37.9 24.6 36.8 39.7 46.3 38.5 29.5 32.6 37.3 23.3 WIND SPEED (MEAN KNOTS) 5.5 6.9 7.2 6.6 6.9 6.8 6.8 6.7 5.2 4.4 4.3 5.1 6.0 FASTEST WIND DIRECTION 210 150 260 240 70 210 290 280 300 260 280 200 70 FASTEST WIND SPEED (KNOTS) 39 39 39 43 47 39 35 33 31 29 27 33 47 YEAR-DAY 86-20 98-13 98-19 98- 6 97-29 87-13 86-18 86-18 91-18 87- 9 91- 1 92-28 97 DAYS WITH SKY CLEAR (0-2)/8 18.7 15.7 15.4 17.7 23.8 25.5 24.3 26.8 28.6 28.5 23.0 18.9 266.9 DAYS WITH P.CLOUDY (3-6)/8 8.4 8.5 9.7 10.3 6.5 4.3 6.1 3.8 1.4 2.3 6.1 9.5 76.9 DAYS WITH CLOUDY (7-8)/8 3.8 4.0 5.8 1.9 0.7 0.2 0.5 0.3 0.0 0.1 0.9 2.6 20.8 DAYS WITH VISIBILITY =< 2 KM 1.2 1.5 2.5 1.2 2.3 1.9 4.0 2.1 1.1 0.5 0.4 1.1 19.8 DURATION OF SUNSHINE HOURS 229.0 221.0 245.6 288.1 330.5 321.9 325.2 331.1 312.0 299.6 259.7 233.9 3397.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 859.9 858.8 857.8 857.2 855.5 851.9 850.1 851.9 855.9 860.3 861.5 861.5 856.9 MAX. QFE PRESSURE IN HPA 867.8 867.5 866.6 865.2 862.0 863.1 856.8 857.4 863.8 867.0 869.9 869.0 869.9 YEAR-DAY 88- 3 91-15 3- 3 3- 7 97-12 89- 4 87-29 2-30 94-23 86-20 3-25 1-18 3-25 MIN. QFE PRESSURE IN HPA 848.4 847.5 845.6 847.0 847.8 844.2 842.6 845.4 846.9 854.1 853.0 852.6 842.6 YEAR-DAY 97-18 90-16 88-24 2- 4 99-21 5-28 95-16 94- 1 0- 1 96- 4 95-26 4-21 95-16 MEAN QNH PRESSURE IN HPA 1016.8 1015.5 1014.3 1013.6 1011.7 1007.6 1005.5 1007.5 1012.1 1017.2 1018.5 1018.6 1013.2 MAX. QNH PRESSURE IN HPA 1025.8 1025.4 1024.4 1022.8 1019.1 1020.4 1013.2 1013.9 1021.2 1024.9 1028.2 1027.2 1028.2 YEAR-DAY 88- 3 91-15 3- 3 3- 7 97-12 89- 4 87-29 2-30 94-23 86-20 3-25 1-18 3-25 MIN. QNH PRESSURE IN HPA 1003.6 1002.5 1000.3 1002.0 1002.9 998.7 996.9 1000.1 1001.8 1010.1 1008.8 1008.4 996.9 YEAR-DAY 97-18 90-16 88-24 2- 4 99-21 5-28 95-16 94- 1 0- 1 96- 4 95-26 4-21 95-16 MEAN QFF PRESSURE IN HPA 1015.3 1012.1 1008.5 1004.9 1000.7 994.2 991.1 994.3 1001.4 1009.1 1013.4 1016.0 1005.1 MAX. QFF PRESSURE IN HPA 1026.7 1021.5 1023.2 1020.1 1011.2 1005.5 1000.8 1003.1 1014.8 1019.1 1027.7 1029.2 1029.2 YEAR-DAY 92-10 97- 8 92-13 94- 6 97- 8 95- 2 87-28 86-29 94-24 95-30 96-19 87- 2 87- 2 MIN. QFF PRESSURE IN HPA 998.4 997.6 990.0 995.6 989.0 984.0 981.1 985.2 990.2 998.2 1002.8 1005.6 981.1 YEAR-DAY 97-18 98-13 88-24 95-16 93-29 86-21 95-16 94- 2 94- 1 98- 1 95-26 94- 4 95-16 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.7 858.5 857.1 857.0 855.9 852.4 850.1 852.0 856.1 860.2 861.2 861.4 856.8 MAX. QFE PRESSURE IN HPA 865.3 864.1 863.3 863.6 861.0 857.8 855.9 856.0 862.4 865.4 868.0 866.8 868.0 YEAR-DAY 87-20 87- 1 97-11 94- 6 95-27 98- 5 87-29 86-30 94-24 93-17 96-16 98-10 96-16 MIN. QFE PRESSURE IN HPA 848.4 849.5 845.9 852.0 849.6 846.0 845.4 846.5 850.7 855.6 854.8 855.2 845.4 YEAR-DAY 97-18 98-16 88-24 94- 4 95-15 86-21 95-17 94- 3 94- 1 96- 5 95-26 91-23 95-17 MEAN QNH PRESSURE IN HPA 1016.5 1015.1 1013.5 1013.4 1012.1 1008.1 1005.5 1007.7 1012.4 1017.1 1018.3 1018.4 1013.2 MAX. QNH PRESSURE IN HPA 1022.9 1021.5 1020.6 1021.0 1018.0 1014.3 1012.1 1012.3 1019.6 1023.0 1026.0 1024.6 1026.0 YEAR-DAY 87-20 87- 1 97-11 94- 6 95-27 98- 5 87-29 86-30 94-24 93-17 96-16 98-10 96-16 MIN. QNH PRESSURE IN HPA 1003.6 1004.8 1000.7 1007.7 1004.9 1000.8 1000.1 1001.4 1006.2 1011.8 1010.9 1011.4 1000.1 YEAR-DAY 97-18 98-16 88-24 94- 4 95-15 86-21 95-17 94- 3 94- 1 96- 5 95-26 91-23 95-17 MEAN QFF PRESSURE IN HPA 1014.5 1011.4 1007.9 1004.7 1000.7 994.7 991.3 994.4 1001.3 1008.9 1012.9 1015.4 1004.8 MAX. QFF PRESSURE IN HPA 1024.9 1019.1 1019.4 1017.7 1009.0 1004.9 999.5 1001.2 1012.2 1017.1 1025.2 1026.1 1026.1 YEAR-DAY 92-11 88- 8 92-13 94- 6 96- 4 95- 1 87-29 86-30 94-24 93-17 96-19 87- 2 87- 2 MIN. QFF PRESSURE IN HPA 998.4 1001.8 990.0 996.3 990.9 985.0 984.1 986.2 992.2 1000.5 1004.7 1005.6 984.1 YEAR-DAY 97-18 98-16 88-24 94- 3 93-30 88-26 95-17 94- 3 94- 1 92- 6 95-26 87-31 95-17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.3 859.2 858.3 857.9 856.5 853.0 851.1 852.9 856.7 861.0 862.2 862.0 857.6 MAX. QFE PRESSURE IN HPA 866.9 866.2 865.6 864.2 861.8 858.8 856.3 857.3 863.2 865.9 868.4 868.1 868.4 YEAR-DAY 88- 3 2- 2 1- 2 3- 7 95-27 88- 1 87-29 1- 5 94-23 93-17 3-25 1-18 3-25 MIN. QFE PRESSURE IN HPA 850.4 850.7 845.6 851.0 850.7 846.8 845.7 847.7 849.5 855.9 855.2 853.8 845.6 YEAR-DAY 97-18 98-16 88-24 4-18 95-15 97-29 97-11 95- 3 0- 1 96- 4 95-26 4-27 88-24 MEAN QNH PRESSURE IN HPA 1017.1 1015.9 1014.9 1014.4 1012.8 1008.9 1006.7 1008.7 1013.1 1018.0 1019.3 1019.1 1014.1 MAX. QNH PRESSURE IN HPA 1024.8 1024.0 1023.3 1021.7 1018.9 1015.5 1012.6 1013.8 1020.5 1023.6 1026.5 1026.1 1026.5 YEAR-DAY 88- 3 2- 2 1- 2 3- 7 95-27 88- 1 87-29 1- 5 94-23 93-17 3-25 1-18 3-25 MIN. QNH PRESSURE IN HPA 1005.8 1006.2 1000.3 1006.5 1006.2 1001.7 1000.5 1002.8 1004.8 1012.1 1011.4 1009.7 1000.3 YEAR-DAY 97-18 98-16 88-24 4-18 95-15 97-29 97-11 95- 3 0- 1 96- 4 95-26 4-27 88-24 MEAN QFF PRESSURE IN HPA 1016.3 1013.6 1010.0 1006.1 1001.4 995.5 992.9 996.0 1002.8 1010.8 1015.3 1017.3 1006.5 MAX. QFF PRESSURE IN HPA 1026.1 1027.6 1024.7 1020.1 1012.6 1005.4 1000.7 1003.1 1014.8 1019.1 1027.7 1029.2 1029.2 YEAR-DAY 1-30 91-15 3- 3 94- 6 89- 2 95- 2 87-29 86-29 94-24 95-30 96-19 87- 2 87- 2 MIN. QFF PRESSURE IN HPA 1001.2 1002.2 990.9 995.6 992.3 986.5 984.8 988.3 992.3 1002.0 1006.2 1005.0 984.8 YEAR-DAY 97-18 3-17 88-24 4-18 1-26 88-26 95-17 94- 3 0- 2 98- 3 95-26 4-27 95-17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHASH (40870) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 28 13 N LONGITUDE 61 12 E DATA PROCESSING CENTER ELEVATION 1394.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 861.5 860.3 859.2 858.6 856.8 853.1 851.2 853.2 857.3 861.8 863.0 863.1 858.3 MAX. QFE PRESSURE IN HPA 867.8 867.5 866.6 865.2 862.0 858.8 856.8 857.4 863.8 867.0 869.9 869.0 869.9 YEAR-DAY 88- 3 91-15 3- 3 3- 7 97-12 88- 1 87-29 2-30 94-23 86-20 3-25 1-18 3-25 MIN. QFE PRESSURE IN HPA 851.9 851.5 848.0 850.8 850.8 846.7 845.4 847.6 849.9 857.0 855.6 854.3 845.4 YEAR-DAY 86-21 3-17 88-24 2- 4 95-15 97-29 95-17 94- 3 0- 1 96- 4 95-26 4-27 95-17 MEAN QNH PRESSURE IN HPA 1018.5 1017.2 1016.0 1015.2 1013.2 1009.0 1006.8 1009.0 1013.7 1018.9 1020.3 1020.4 1014.9 MAX. QNH PRESSURE IN HPA 1025.8 1025.4 1024.4 1022.8 1019.1 1015.5 1013.2 1013.9 1021.2 1024.9 1028.2 1027.2 1028.2 YEAR-DAY 88- 3 91-15 3- 3 3- 7 97-12 88- 1 87-29 2-30 94-23 86-20 3-25 1-18 3-25 MIN. QNH PRESSURE IN HPA 1007.6 1007.1 1003.1 1006.3 1006.3 1001.6 1000.1 1002.6 1005.3 1013.4 1011.8 1010.3 1000.1 YEAR-DAY 86-21 3-17 88-24 2- 4 95-15 97-29 95-17 94- 3 0- 1 96- 4 95-26 4-27 95-17 MEAN QFF PRESSURE IN HPA 1017.0 1013.7 1009.9 1006.1 1001.7 995.2 992.0 995.2 1002.3 1010.2 1014.7 1017.6 1006.3 MAX. QFF PRESSURE IN HPA 1026.6 1021.5 1023.2 1019.3 1011.2 1005.5 1000.8 1002.0 1013.4 1018.3 1026.6 1027.6 1027.6 YEAR-DAY 92-10 97- 8 92-13 94- 6 97- 8 95- 2 87-28 86-29 94-23 93-17 96-19 87- 2 87- 2 MIN. QFF PRESSURE IN HPA 1006.4 1001.9 994.9 998.1 992.4 986.2 983.5 987.2 993.5 1000.1 1006.0 1008.1 983.5 YEAR-DAY 97-18 98-13 88-24 98-30 93-29 86-24 95-17 94- 3 94- 1 98- 3 95-26 97-11 95-17 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.6 858.8 857.9 857.3 855.6 851.9 850.1 851.7 855.6 859.9 861.1 861.1 856.7 MAX. QFE PRESSURE IN HPA 865.8 866.1 865.5 864.0 860.3 858.1 855.8 856.7 862.2 865.4 868.3 866.9 868.3 YEAR-DAY 88- 3 91-15 3- 3 3- 7 92-13 99- 1 96- 3 93-18 94-23 86-20 96-15 4- 4 96-15 MIN. QFE PRESSURE IN HPA 851.7 849.8 849.0 847.0 849.3 845.7 844.3 846.4 848.3 855.1 853.3 853.3 844.3 YEAR-DAY 98-13 3-17 88-24 2- 4 95-15 97-29 95-17 95- 3 0- 1 95-15 95-26 4-21 95-17 MEAN QNH PRESSURE IN HPA 1016.4 1015.4 1014.4 1013.7 1011.8 1007.6 1005.5 1007.4 1011.9 1016.7 1018.1 1018.1 1013.1 MAX. QNH PRESSURE IN HPA 1023.5 1023.8 1023.1 1021.4 1017.2 1014.7 1012.0 1013.1 1019.4 1023.0 1026.4 1024.8 1026.4 YEAR-DAY 88- 3 91-15 3- 3 3- 7 92-13 99- 1 96- 3 93-18 94-23 86-20 96-15 4- 4 96-15 MIN. QNH PRESSURE IN HPA 1007.3 1005.2 1004.2 1002.0 1004.6 1000.5 998.9 1001.3 1003.4 1011.2 1009.2 1009.2 998.9 YEAR-DAY 98-13 3-17 88-24 2- 4 95-15 97-29 95-17 95- 3 0- 1 95-15 95-26 4-21 95-17 MEAN QFF PRESSURE IN HPA 1014.5 1011.5 1008.2 1004.7 1000.4 993.8 990.6 993.6 1000.5 1008.1 1012.3 1015.0 1004.4 MAX. QFF PRESSURE IN HPA 1023.5 1019.1 1021.3 1015.9 1008.9 1004.1 998.5 1000.1 1010.8 1015.3 1023.8 1024.5 1024.5 YEAR-DAY 92-10 92-13 92-13 94- 6 97- 8 97- 8 87-28 86-29 94-23 93- 9 96-19 87- 1 87- 1 MIN. QFF PRESSURE IN HPA 1004.3 999.7 996.0 996.6 991.0 985.0 982.9 986.4 991.2 999.3 1002.8 1005.6 982.9 YEAR-DAY 98-13 98-13 88-24 98-30 99-21 86-20 95-17 94- 3 94- 1 98- 3 95-26 94- 4 95-17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.7 857.6 856.6 855.8 854.2 850.6 848.8 850.4 854.4 858.8 860.1 860.3 855.5 MAX. QFE PRESSURE IN HPA 864.6 865.3 864.4 862.3 859.6 857.1 853.9 855.5 861.3 864.1 867.6 865.9 867.6 YEAR-DAY 94-28 91-15 3- 3 3- 7 95-26 97- 8 87-29 93-18 94-23 86-20 96-15 96- 7 96-15 MIN. QFE PRESSURE IN HPA 849.0 847.5 848.1 849.0 847.8 844.2 842.6 845.4 846.9 854.1 853.0 852.6 842.6 YEAR-DAY 93-14 90-16 1-26 2- 4 99-21 5-28 95-16 94- 1 0- 1 96- 4 95-26 4-21 95-16 MEAN QNH PRESSURE IN HPA 1015.4 1014.1 1012.9 1012.1 1010.2 1006.1 1004.0 1005.8 1010.4 1015.5 1017.0 1017.2 1011.7 MAX. QNH PRESSURE IN HPA 1022.1 1022.9 1021.9 1019.5 1016.4 1013.5 1009.9 1011.7 1018.3 1021.5 1025.6 1023.6 1025.6 YEAR-DAY 94-28 91-15 3- 3 3- 7 95-26 97- 8 87-29 93-18 94-23 86-20 96-15 96- 7 96-15 MIN. QNH PRESSURE I