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 **