STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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OF WIND OBSERVATION **** **** **** **** 147 180 157 155 150 155 150 155 1249 VECTOR WIND DIRECTION (MEAN) *** *** *** *** 309 287 264 239 231 253 333 146 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** 1.7 7.4 4.3 1.9 1.7 2.1 1.0 0.3 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** 25.4 91.4 70.5 46.3 47.2 41.2 16.4 6.3 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** 6.7 8.1 6.1 4.1 3.6 5.1 6.1 4.8 **** FASTEST WIND DIRECTION *** *** *** *** 10 300 300 300 310 200 170 110 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** 23 23 16 12 16 19 19 23 *** DAY ** ** ** ** 21 30 1 26 29 1 8 27 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** **** 9 27 29 31 29 23 16 19 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** **** 11 3 2 0 1 7 8 8 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** **** 5 0 0 0 0 1 6 4 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** **** 0 0 2 1 0 2 3 7 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** 145.6 331.9 331.3 316.1 303.0 243.1 209.9 196.4 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 ****** ****** ****** ****** 1006.0 998.5 995.8 997.5 1005.2 1010.6 1014.9 1018.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 1012.4 1007.6 998.8 1002.0 1010.5 1015.0 1021.0 1024.2 ****** DAY ** ** ** ** 18 2 27 29 22 20 15 3 MIN. 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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 BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.9 17.0 18.0 25.0 31.9 35.3 37.8 37.5 33.9 26.7 19.9 13.9 25.8 MINIMUN AIR TEMPERATURE (C) 4.8 8.0 12.6 16.4 22.4 22.4 23.7 23.6 19.7 17.4 10.2 7.0 15.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 6 24 23 29 23 8 9 0 0 122 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 2 3 TEMPERATURE RECORDS LOWEST(C) 0.0 3.0 6.0 9.5 18.0 18.0 19.8 16.4 15.0 9.4 4.8 -1.6 -1.6 DAY 2 13 22 22 8 6 11 28 24 29 12 30 MAXIMUM AIR TEMPERATURE (C) 19.6 23.6 22.5 30.7 38.8 42.8 45.7 45.3 42.1 32.7 27.2 19.2 32.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 17 31 30 31 31 30 22 9 0 201 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.4 28.2 28.5 40.5 42.0 49.2 49.2 50.8 45.4 40.4 32.2 25.2 50.8 DAY 31 2 8 30 29 29 25 14 7 3 14 1 DIF. BETWEEN (MAX.-MIN.) (C) 14.8 15.6 9.9 14.3 16.4 20.4 22.0 21.7 22.4 15.3 17.0 12.2 16.8 MEAN DAILY TEMP. (MDT) (C) 12.2 15.8 17.6 23.5 30.6 32.6 34.7 34.5 30.9 25.1 18.7 13.1 24.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.4 94.0 297.6 347.7 424.2 417.7 296.7 125.5 11.0 0.0 2015.9 HEATING DEG. DAYS(BASE 18 0C) 172.5 65.4 38.5 0.3 0.0 0.0 0.0 0.0 0.0 0.1 29.0 154.1 459.8 DEWPOINT (MEAN C) 4.9 6.1 9.4 9.9 16.6 14.5 14.8 18.5 15.0 15.1 7.8 6.3 11.6 MIXING RATIO (G/KG) 5.53 6.05 7.64 7.89 12.54 10.80 11.11 14.48 11.41 11.22 6.80 6.36 9.32 VAPOUR PRESSURE (HPA) 8.98 9.78 12.28 12.67 19.89 17.11 17.52 22.73 18.18 18.03 11.06 10.35 14.88 SATURATION DEF. (HPA) 6.76 10.78 8.96 20.49 29.31 43.63 52.32 46.66 38.99 19.37 13.79 6.43 24.79 RELATIVE HUMIDITY (MEAN %) 63 54 60 41 43 32 29 36 36 53 51 67 47 RELATIVE HUMIDITY (MAX. %) 90 84 81 64 62 49 48 54 58 74 76 87 69 RELATIVE HUMIDITY (MIN. %) 39 31 43 26 27 21 17 25 24 41 31 47 31 RELATIVE HUMIDITY (MEAN% 03UTC) 89 82 80 61 60 48 47 53 58 73 75 85 68 RELATIVE HUMIDITY (MEAN% 09UTC) 50 42 54 31 35 25 23 28 27 45 38 59 38 RELATIVE HUMIDITY (MEAN% 15UTC) 54 47 53 40 43 29 24 34 34 51 51 66 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.2 9.4 37.5 3.7 0.4 0.0 0.0 2.0 0.0 22.0 5.7 31.6 112.5 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH PRECIPITATION >= 5 0 1 3 0 0 0 0 0 0 1 1 3 9 DAYS WITH PRECIPITATION >= 1 0 2 9 2 0 0 0 1 0 7 1 7 29 DAYS WITH PRECIPITATION 2 5 12 6 1 0 0 1 0 8 2 7 44 GREATEST DAILY PRECIPITATION 0.2 7.0 8.0 2.0 0.4 0.0 0.0 2.0 0.0 6.0 5.0 10.0 10.0 DAY 24 9 4 18 12 ** ** 11 ** 20 3 27 DAY WITH THUNDER STORM 0 1 3 1 0 0 0 0 0 6 1 0 12 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 2 6 2 5 10 11 12 6 4 3 1 64 WIND DIRECTION (PREVAILING) 270 270 135 270 270 270 270 270 270 90 270 270 270 PREVAILING WIND SPEED(KNOTS) 6.3 5.5 9.6 7.0 6.3 7.7 8.0 10.5 9.3 11.5 10.4 10.5 8.1 PREVAILING WIND PERCENT 27.7 15.7 20.2 16.4 26.3 40.0 36.8 34.2 28.7 18.7 24.0 19.4 24.8 CALMS PERCENT OF WIND 40.6 39.3 31.0 37.4 34.9 34.0 29.0 27.6 34.0 36.8 30.7 29.0 33.7 NO. OF WIND OBSERVATION 155 140 168 171 175 150 155 152 150 155 150 155 1876 VECTOR WIND DIRECTION (MEAN) 285 160 141 266 280 286 276 281 263 54 305 10 282 VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.6 1.4 1.2 1.7 4.7 4.0 6.3 3.3 2.0 2.8 0.3 1.8 WIND STEADINESES (MEAN %) 22.7 14.3 25.5 22.2 35.4 82.5 69.0 80.8 56.9 31.3 40.6 4.2 31.0 WIND SPEED (MEAN KNOTS) 4.4 4.2 5.5 5.4 4.8 5.7 5.8 7.8 5.8 6.4 6.9 7.2 5.8 FASTEST WIND DIRECTION 80 120 180 130 10 300 120 300 290 130 300 80 120 FASTEST WIND SPEED (KNOTS) 23 19 17 23 19 19 31 29 21 25 31 25 31 DAY 23 8 4 15 4 3 31 26 7 24 11 13 DAYS WITH SKY CLEAR (0-2)/8 19 20 12 15 17 30 30 30 29 14 21 13 250 DAYS WITH P.CLOUDY (3-6)/8 7 7 12 14 11 0 1 1 1 7 8 11 80 DAYS WITH CLOUDY (7-8)/8 5 1 7 1 3 0 0 0 0 10 1 7 35 DAYS WITH VISIBILITY =< 2 KM 3 2 6 0 0 1 2 0 0 2 0 6 22 DURATION OF SUNSHINE HOURS 208.0 187.9 175.1 260.6 256.5 186.3 ****** ****** 279.3 184.7 237.9 151.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1020.1 1017.0 1013.0 1013.4 1008.4 1003.4 999.8 1003.2 1012.5 1019.3 1023.9 1025.5 1013.3 MAX. QFE PRESSURE IN HPA 1025.0 1023.4 1018.8 1021.5 1015.0 1008.2 1004.4 1010.7 1020.0 1025.4 1029.2 1032.1 1032.1 DAY-HOUR 12- 6 6- 9 15- 6 22- 6 12- 6 1- 9 30- 9 31- 9 30- 9 28- 6 30- 9 2- 6 MIN. QFE PRESSURE IN HPA 1008.8 1008.5 1002.7 1006.0 1003.0 998.9 993.0 995.8 1007.0 1011.1 1017.6 1016.5 993.0 DAY-HOUR 6-12 28-15 13-15 19- 3 21-15 8-15 27-15 13-15 11-15 4-12 7-12 27-12 MEAN QNH PRESSURE IN HPA 1020.8 1017.6 1013.7 1014.1 1009.0 1004.1 1000.4 1003.8 1013.1 1020.0 1024.5 1026.2 1013.9 MAX. QNH PRESSURE IN HPA 1025.6 1024.0 1019.4 1022.1 1015.6 1008.8 1005.0 1011.3 1020.6 1026.0 1029.8 1032.7 1032.7 DAY-HOUR 12- 6 6- 9 15- 6 22- 6 12- 6 1- 9 30- 9 31- 9 30- 9 28- 6 30- 9 2- 6 MIN. QNH PRESSURE IN HPA 1009.4 1009.1 1003.3 1006.6 1003.6 999.5 993.6 996.4 1007.6 1011.7 1018.2 1017.1 993.6 DAY-HOUR 6-12 28-15 13-15 19- 3 21-15 8-15 27-15 13-15 11-15 4-12 7-12 27-12 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 1020.0 1016.8 1012.9 1013.6 1008.3 1003.2 999.4 1002.7 1012.0 1019.2 1023.6 1025.6 1013.1 MAX. QFE PRESSURE IN HPA 1023.6 1022.0 1017.3 1020.0 1013.8 1006.6 1002.4 1009.1 1017.2 1024.5 1027.0 1031.7 1031.7 DAY 12 7 15 22 13 1 9 31 30 28 30 2 MIN. QFE PRESSURE IN HPA 1012.2 1008.8 1006.3 1006.0 1004.0 1000.0 995.0 996.2 1007.2 1012.1 1018.2 1018.5 995.0 DAY 6 10 13 19 23 8 27 14 10 4 7 28 MEAN QNH PRESSURE IN HPA 1020.7 1017.4 1013.5 1014.2 1008.9 1003.8 1000.0 1003.3 1012.6 1019.8 1024.3 1026.2 1013.7 MAX. QNH PRESSURE IN HPA 1024.2 1022.6 1017.9 1020.6 1014.4 1007.2 1003.0 1009.7 1017.8 1025.1 1027.6 1032.3 1032.3 DAY 12 7 15 22 13 1 9 31 30 28 30 2 MIN. QNH PRESSURE IN HPA 1012.8 1009.4 1006.9 1006.6 1004.6 1000.6 995.6 996.8 1007.8 1012.7 1018.8 1019.1 995.6 DAY 6 10 13 19 23 8 27 14 10 4 7 28 MEAN QFF PRESSURE IN HPA 1021.0 1017.7 1013.8 1014.5 1009.2 1004.0 1000.2 1003.4 1012.9 1020.1 1024.6 1026.5 1014.0 MAX. QFF PRESSURE IN HPA 1024.6 1022.9 1017.9 1020.9 1014.7 1007.5 1003.3 1010.0 1018.1 1025.4 1027.9 1032.7 1032.7 DAY 12 7 24 22 13 1 9 31 30 28 30 2 MIN. QFF PRESSURE IN HPA 1013.1 1009.7 1007.2 1006.9 1004.9 1000.9 995.9 997.0 1008.1 1013.0 1019.1 1019.4 995.9 DAY 6 10 13 19 30 8 27 14 10 4 7 28 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1021.3 1018.1 1013.9 1014.8 1009.4 1004.3 1000.6 1004.1 1013.4 1020.5 1025.1 1026.8 1014.4 MAX. QFE PRESSURE IN HPA 1025.0 1023.0 1018.8 1021.5 1015.0 1008.0 1004.2 1010.5 1019.3 1025.4 1028.8 1032.1 1032.1 DAY 12 2 15 22 12 1 30 31 30 28 30 2 MIN. QFE PRESSURE IN HPA 1011.8 1009.8 1006.2 1007.8 1005.0 1001.0 995.3 997.5 1008.8 1013.6 1020.0 1019.4 995.3 DAY 6 9 4 19 30 8 27 14 10 4 7 28 MEAN QNH PRESSURE IN HPA 1022.0 1018.8 1014.6 1015.5 1010.1 1004.9 1001.3 1004.7 1014.1 1021.2 1025.8 1027.4 1015.0 MAX. QNH PRESSURE IN HPA 1025.6 1023.6 1019.4 1022.1 1015.6 1008.6 1004.8 1011.1 1019.9 1026.0 1029.4 1032.7 1032.7 DAY 12 2 15 22 12 1 30 31 30 28 30 2 MIN. QNH PRESSURE IN HPA 1012.4 1010.4 1006.8 1008.4 1005.6 1001.6 995.9 998.1 1009.4 1014.2 1020.6 1020.0 995.9 DAY 6 9 4 19 30 8 27 14 10 4 7 28 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1014.9 1010.8 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1022.4 1015.9 ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** 22 12 ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1008.7 1005.9 ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** 19 30 ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1020.7 1017.9 1013.8 1014.3 1009.2 1004.3 1000.7 1004.3 1013.4 1020.0 1024.4 1026.2 1014.1 MAX. QFE PRESSURE IN HPA 1024.9 1023.4 1017.8 1020.8 1014.2 1008.2 1004.4 1010.7 1020.0 1025.0 1029.2 1032.1 1032.1 DAY 28 6 31 7 12 1 30 31 30 31 30 2 MIN. QFE PRESSURE IN HPA 1009.5 1009.6 1006.2 1008.2 1005.2 1000.5 995.8 997.8 1008.8 1013.0 1019.0 1018.5 995.8 DAY 6 9 4 19 23 8 27 13 10 4 7 27 MEAN QNH PRESSURE IN HPA 1021.3 1018.6 1014.4 1014.9 1009.8 1004.9 1001.3 1004.9 1014.0 1020.7 1025.1 1026.9 1014.7 MAX. QNH PRESSURE IN HPA 1025.5 1024.0 1018.4 1021.4 1014.8 1008.8 1005.0 1011.3 1020.6 1025.6 1029.8 1032.7 1032.7 DAY 28 6 31 7 12 1 30 31 30 31 30 2 MIN. QNH PRESSURE IN HPA 1010.1 1010.2 1006.8 1008.8 1005.8 1001.1 996.4 998.4 1009.4 1013.6 1019.6 1019.1 996.4 DAY 6 9 4 19 23 8 27 13 10 4 7 27 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 1019.2 1016.1 1012.2 1012.8 1008.0 1003.2 999.3 1002.8 1012.0 1018.6 1022.9 1024.6 1012.6 MAX. QFE PRESSURE IN HPA 1022.8 1022.0 1016.2 1019.2 1013.8 1007.0 1002.7 1009.6 1017.5 1023.9 1027.4 1029.8 1029.8 DAY 28 6 31 7 13 1 9 31 30 31 30 1 MIN. QFE PRESSURE IN HPA 1008.8 1008.8 1004.3 1007.6 1004.0 1000.0 993.8 996.3 1007.8 1011.1 1017.6 1016.5 993.8 DAY 6 9 13 4 29 8 27 13 10 4 7 27 MEAN QNH PRESSURE IN HPA 1019.8 1016.7 1012.9 1013.4 1008.6 1003.8 999.9 1003.4 1012.6 1019.2 1023.5 1025.2 1013.3 MAX. QNH PRESSURE IN HPA 1023.4 1022.6 1016.8 1019.8 1014.4 1007.6 1003.3 1010.2 1018.1 1024.5 1028.0 1030.4 1030.4 DAY 28 6 31 7 13 1 9 31 30 31 30 1 MIN. QNH PRESSURE IN HPA 1009.4 1009.4 1004.9 1008.2 1004.6 1000.6 994.4 996.9 1008.4 1011.7 1018.2 1017.1 994.4 DAY 6 9 13 4 29 8 27 13 10 4 7 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.5 1016.0 1012.0 1012.4 1007.1 1002.3 998.9 1002.1 1011.6 1018.4 1023.3 1024.5 1012.3 MAX. QFE PRESSURE IN HPA 1023.0 1022.0 1016.2 1019.0 1012.5 1005.6 1003.9 1008.8 1017.5 1023.8 1027.8 1030.2 1030.2 DAY 12 6 31 7 12 1 29 31 30 27 30 1 MIN. QFE PRESSURE IN HPA 1010.4 1008.5 1002.7 1007.2 1003.0 998.9 993.0 995.8 1007.0 1012.0 1018.6 1016.5 993.0 DAY 6 28 13 25 21 8 27 13 11 4 25 27 MEAN QNH PRESSURE IN HPA 1020.1 1016.6 1012.6 1013.0 1007.7 1002.9 999.5 1002.8 1012.3 1019.0 1023.9 1025.1 1013.0 MAX. QNH PRESSURE IN HPA 1023.6 1022.6 1016.8 1019.6 1013.1 1006.2 1004.5 1009.4 1018.1 1024.4 1028.4 1030.8 1030.8 DAY 12 6 31 7 12 1 29 31 30 27 30 1 MIN. QNH PRESSURE IN HPA 1011.0 1009.1 1003.3 1007.8 1003.6 999.5 993.6 996.4 1007.6 1012.6 1019.2 1017.1 993.6 DAY 6 28 13 25 21 8 27 13 11 4 25 27 MEAN QFF PRESSURE IN HPA 1020.4 1016.8 1012.9 1013.3 1008.0 1003.2 999.7 1003.0 1012.5 1019.3 1024.2 1025.4 1013.2 MAX. QFF PRESSURE IN HPA 1024.0 1022.9 1017.1 1019.9 1013.4 1006.5 1004.8 1009.7 1018.4 1024.7 1028.7 1031.1 1031.1 DAY 12 6 31 7 12 1 29 31 30 27 30 1 MIN. QFF PRESSURE IN HPA 1011.3 1009.4 1003.6 1008.1 1003.9 999.8 993.8 996.6 1007.9 1012.9 1019.5 1017.4 993.8 DAY 6 28 13 25 21 8 27 13 11 4 25 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 1012.5 1008.2 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 1019.8 1013.0 ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** 21 12 ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** 1008.0 1005.0 ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** 18 29 ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** 1013.1 1008.9 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1020.4 1013.6 ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** 21 12 ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** 1008.6 1005.6 ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** 18 29 ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** 1013.4 1009.1 ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1020.7 1013.9 ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** 21 12 ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** 1008.9 1005.9 ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** 18 29 ** ** ** ** ** ** ** 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 BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.3 15.4 18.5 25.2 31.4 35.2 37.6 36.7 33.4 28.5 18.9 13.7 25.5 MINIMUN AIR TEMPERATURE (C) 5.5 8.0 11.8 16.7 17.8 18.4 22.9 23.0 18.8 16.4 8.9 6.8 14.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 5 4 2 29 26 5 3 0 0 74 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 4 0 0 0 0 0 0 0 0 0 2 2 8 TEMPERATURE RECORDS LOWEST(C) -0.4 3.2 4.0 8.1 14.0 16.0 20.0 16.6 15.4 11.8 -3.0 -1.5 -3.0 DAY 2 12 6 2 24 4 1 31 12 7 15 29 MAXIMUM AIR TEMPERATURE (C) 15.8 20.3 22.9 30.7 37.6 43.0 44.6 43.5 41.6 36.3 26.8 19.0 31.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 16 31 30 31 30 30 30 9 0 208 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.8 25.0 31.0 38.8 43.0 47.6 50.0 47.8 46.0 39.0 35.4 25.0 50.0 DAY 26 29 30 22 31 15 13 1 9 4 8 7 DIF. BETWEEN (MAX.-MIN.) (C) 10.3 12.3 11.1 14.0 19.8 24.6 21.7 20.5 22.8 19.9 17.9 12.2 17.2 MEAN DAILY TEMP. (MDT) (C) 10.7 14.1 17.3 23.7 27.7 30.7 33.7 33.3 30.2 26.3 17.8 12.9 23.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 2.2 100.5 207.4 291.7 394.5 355.2 275.7 165.2 33.6 0.0 1826.1 HEATING DEG. DAYS(BASE 18 0C) 227.5 112.3 43.5 1.3 0.0 0.0 0.0 0.0 0.0 0.0 78.7 158.9 622.0 DEWPOINT (MEAN C) 6.5 6.7 8.7 12.9 11.5 16.9 17.9 17.3 13.7 12.4 5.1 7.2 11.4 MIXING RATIO (G/KG) 6.12 6.26 7.13 9.64 9.02 12.62 13.96 13.03 10.22 9.39 5.82 6.55 9.15 VAPOUR PRESSURE (HPA) 9.91 10.10 11.47 15.38 14.34 19.87 21.76 20.41 16.19 14.99 9.41 10.59 14.54 SATURATION DEF. (HPA) 3.91 7.99 10.72 18.32 34.19 40.64 47.23 44.88 39.72 26.72 15.08 5.99 24.62 RELATIVE HUMIDITY (MEAN %) 76 60 57 50 35 37 36 36 34 41 44 68 48 RELATIVE HUMIDITY (MAX. %) 95 85 83 75 65 62 58 63 62 67 66 86 72 RELATIVE HUMIDITY (MIN. %) 56 40 39 33 17 25 24 22 20 23 26 50 31 RELATIVE HUMIDITY (MEAN% 03UTC) 93 83 82 75 65 62 58 64 62 67 66 85 72 RELATIVE HUMIDITY (MEAN% 09UTC) 70 50 46 40 22 28 29 25 23 29 33 60 38 RELATIVE HUMIDITY (MEAN% 15UTC) 69 52 51 45 32 31 28 30 32 40 43 66 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 43.6 46.8 30.2 32.8 0.8 0.0 0.0 0.0 0.0 0.0 3.0 22.1 179.3 DAYS WITH PRECIPITATION >=10 1 1 2 2 0 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 5 4 2 3 2 0 0 0 0 0 0 0 1 12 DAYS WITH PRECIPITATION >= 1 8 5 4 3 0 0 0 0 0 0 1 5 26 DAYS WITH PRECIPITATION 11 9 6 7 1 0 0 0 0 0 1 6 41 GREATEST DAILY PRECIPITATION 13.0 32.0 10.0 15.0 0.8 0.0 0.0 0.0 0.0 0.0 3.0 15.0 32.0 DAY 13 23 8 26 2 ** ** ** ** ** 28 17 DAY WITH THUNDER STORM 1 2 2 5 2 0 0 0 0 0 1 0 13 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 3 9 3 8 1 3 3 8 0 0 0 38 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 225 225 *** 270 270 *** PREVAILING WIND SPEED(KNOTS) 7.5 7.1 11.8 11.8 13.5 13.1 11.9 9.2 10.8 **** 10.2 7.5 **** PREVAILING WIND PERCENT 13.5 23.4 29.0 19.3 40.6 37.3 32.7 28.3 25.3 ***** 26.7 20.6 ***** CALMS PERCENT OF WIND 54.8 38.6 23.9 28.0 12.9 13.3 46.0 25.0 38.0 ***** 28.7 40.6 ***** NO. OF WIND OBSERVATION 155 145 155 150 155 150 150 152 150 101 150 155 1768 VECTOR WIND DIRECTION (MEAN) 331 196 289 230 271 265 260 255 263 *** 284 270 *** VECTOR WIND MAGNITUDE(KNOTS) 1.0 0.6 2.8 1.2 7.6 7.9 5.1 5.6 6.2 **** 3.3 1.1 **** WIND STEADINESES (MEAN %) 27.8 10.7 32.6 15.8 72.4 79.8 86.4 73.7 83.8 ***** 47.8 22.4 ***** WIND SPEED (MEAN KNOTS) 3.6 5.6 8.6 7.6 10.5 9.9 5.9 7.6 7.4 **** 6.9 4.9 **** FASTEST WIND DIRECTION 360 120 300 120 60 280 290 290 290 *** 300 120 *** FASTEST WIND SPEED (KNOTS) 23 27 29 27 29 23 29 27 31 *** 23 23 *** DAY 15 1 14 25 2 6 4 1 10 ** 14 25 DAYS WITH SKY CLEAR (0-2)/8 12 13 16 10 25 29 28 31 29 24 20 11 248 DAYS WITH P.CLOUDY (3-6)/8 12 14 9 12 5 1 2 0 1 6 8 10 80 DAYS WITH CLOUDY (7-8)/8 7 2 6 8 1 0 0 0 0 1 2 9 36 DAYS WITH VISIBILITY =< 2 KM 13 2 4 1 0 0 3 1 1 0 0 10 35 DURATION OF SUNSHINE HOURS 173.4 191.0 224.4 188.0 310.9 340.4 320.1 ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.4 1014.7 1012.1 1009.4 1006.2 1000.9 994.8 996.8 1002.7 1009.9 1016.9 1017.3 1008.3 MAX. QFE PRESSURE IN HPA 1025.8 1023.2 1019.0 1016.1 1011.7 1005.4 1000.4 1004.2 1008.5 1016.6 1025.2 1029.0 1029.0 DAY-HOUR 3- 9 20- 6 15- 9 8- 9 8- 6 3- 6 30- 6 31- 6 14- 9 28- 6 15- 6 29- 6 MIN. QFE PRESSURE IN HPA 1010.8 1004.2 1001.0 999.4 1001.0 994.8 988.9 992.0 996.8 1002.8 1009.3 1004.8 988.9 DAY-HOUR 26- 3 23-15 8-15 25-15 17-15 30-15 15-15 11-15 2-15 1-12 10-15 26- 3 MEAN QNH PRESSURE IN HPA 1019.1 1015.3 1012.7 1010.0 1006.8 1001.5 995.4 997.4 1003.3 1010.5 1017.5 1018.0 1009.0 MAX. QNH PRESSURE IN HPA 1026.4 1023.8 1019.6 1016.7 1012.3 1006.0 1001.0 1004.8 1009.1 1017.2 1025.8 1029.6 1029.6 DAY-HOUR 3- 9 20- 6 15- 9 8- 9 8- 6 3- 6 30- 6 31- 6 14- 9 28- 6 15- 6 29- 6 MIN. QNH PRESSURE IN HPA 1011.4 1004.8 1001.6 1000.0 1001.6 995.4 989.5 992.6 997.4 1003.4 1009.9 1005.4 989.5 DAY-HOUR 26- 3 23-15 8-15 25-15 17-15 30-15 15-15 11-15 2-15 1-12 10-15 26- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.2 1014.7 1011.9 1009.3 1006.2 1000.9 994.7 996.7 1002.5 1009.8 1016.9 1017.2 1008.2 MAX. QFE PRESSURE IN HPA 1024.2 1022.0 1017.4 1014.5 1011.0 1004.2 999.2 1002.6 1006.8 1015.0 1024.4 1027.5 1027.5 DAY 4 20 15 8 4 18 30 31 15 28 15 29 MIN. QFE PRESSURE IN HPA 1010.8 1004.5 1006.2 1002.4 1001.2 996.0 990.2 993.2 997.2 1003.2 1011.8 1004.8 990.2 DAY 26 2 21 25 18 28 15 11 17 1 28 26 MEAN QNH PRESSURE IN HPA 1018.8 1015.3 1012.5 1009.9 1006.8 1001.6 995.3 997.4 1003.2 1010.4 1017.6 1017.8 1008.9 MAX. QNH PRESSURE IN HPA 1024.8 1022.6 1018.0 1015.1 1011.6 1004.8 999.8 1003.2 1007.4 1015.6 1025.0 1028.1 1028.1 DAY 4 20 15 8 4 18 30 31 15 28 15 29 MIN. QNH PRESSURE IN HPA 1011.4 1005.1 1006.8 1003.0 1001.8 996.6 990.8 993.8 997.8 1003.8 1012.4 1005.4 990.8 DAY 26 2 21 25 18 28 15 11 17 1 28 26 MEAN QFF PRESSURE IN HPA 1019.1 1015.6 1012.8 1010.2 1007.0 1001.8 995.5 997.6 1003.4 1010.7 1017.9 1018.1 1009.2 MAX. QFF PRESSURE IN HPA 1025.2 1022.9 1018.3 1015.4 1011.9 1005.1 1000.1 1003.5 1007.7 1015.9 1025.4 1028.5 1028.5 DAY 4 20 15 8 4 18 30 31 15 28 15 29 MIN. QFF PRESSURE IN HPA 1011.7 1005.4 1007.1 1003.3 1002.1 996.9 991.0 994.1 998.1 1004.1 1012.7 1005.7 991.0 DAY 26 2 21 25 18 28 15 11 17 1 28 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.4 1016.0 1013.3 1010.6 1007.2 1001.7 995.5 997.8 1003.9 1011.3 1018.5 1018.5 1009.5 MAX. QFE PRESSURE IN HPA 1025.0 1023.2 1018.9 1016.0 1011.7 1005.4 1000.4 1004.2 1008.2 1016.6 1025.2 1029.0 1029.0 DAY 3 20 6 8 8 3 30 31 14 28 15 29 MIN. QFE PRESSURE IN HPA 1012.4 1006.8 1008.2 1002.4 1002.8 996.9 991.0 994.8 999.7 1004.5 1014.2 1005.8 991.0 DAY 26 2 20 25 27 28 15 3 3 1 10 26 MEAN QNH PRESSURE IN HPA 1020.0 1016.6 1013.9 1011.2 1007.8 1002.4 996.2 998.5 1004.5 1011.9 1019.1 1019.2 1010.1 MAX. QNH PRESSURE IN HPA 1025.6 1023.8 1019.5 1016.6 1012.3 1006.0 1001.0 1004.8 1008.8 1017.2 1025.8 1029.6 1029.6 DAY 3 20 6 8 8 3 30 31 14 28 15 29 MIN. QNH PRESSURE IN HPA 1013.0 1007.4 1008.8 1003.0 1003.4 997.5 991.6 995.4 1000.3 1005.1 1014.8 1006.4 991.6 DAY 26 2 20 25 27 28 15 3 3 1 10 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 1019.3 1015.6 1013.0 1010.3 1006.9 1001.7 995.7 997.6 1003.5 1010.3 1017.4 1017.9 1009.1 MAX. QFE PRESSURE IN HPA 1025.8 1022.0 1019.0 1016.1 1011.0 1005.0 1000.1 1003.8 1008.5 1016.0 1024.0 1028.2 1028.2 DAY 3 4 15 8 3 3 12 31 14 28 15 29 MIN. QFE PRESSURE IN HPA 1012.6 1007.4 1007.3 1002.1 1002.8 996.9 991.0 994.5 999.5 1003.5 1012.1 1007.0 991.0 DAY 26 2 20 25 18 28 15 11 17 1 10 26 MEAN QNH PRESSURE IN HPA 1019.9 1016.2 1013.6 1010.9 1007.5 1002.3 996.3 998.2 1004.2 1011.0 1018.1 1018.5 1009.7 MAX. QNH PRESSURE IN HPA 1026.4 1022.6 1019.6 1016.7 1011.6 1005.6 1000.7 1004.4 1009.1 1016.6 1024.6 1028.8 1028.8 DAY 3 4 15 8 3 3 12 31 14 28 15 29 MIN. QNH PRESSURE IN HPA 1013.2 1008.0 1007.9 1002.7 1003.4 997.5 991.6 995.1 1000.1 1004.1 1012.7 1007.6 991.6 DAY 26 2 20 25 18 28 15 11 17 1 10 26 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 1017.6 1013.5 1011.2 1008.6 1005.7 1000.5 994.4 996.3 1001.9 1008.9 1015.7 1016.4 1007.5 MAX. QFE PRESSURE IN HPA 1024.0 1020.5 1017.0 1014.7 1010.9 1004.0 999.3 1002.0 1007.0 1014.6 1022.6 1027.0 1027.0 DAY 3 4 15 12 3 3 2 31 14 28 14 29 MIN. QFE PRESSURE IN HPA 1011.5 1005.2 1004.8 1000.7 1001.8 995.7 990.0 993.0 998.0 1002.8 1009.8 1005.4 990.0 DAY 26 23 20 25 27 28 15 10 2 1 10 25 MEAN QNH PRESSURE IN HPA 1018.2 1014.1 1011.8 1009.2 1006.3 1001.1 995.1 996.9 1002.5 1009.5 1016.4 1017.1 1008.2 MAX. QNH PRESSURE IN HPA 1024.6 1021.1 1017.6 1015.3 1011.5 1004.6 999.9 1002.6 1007.6 1015.2 1023.2 1027.6 1027.6 DAY 3 4 15 12 3 3 2 31 14 28 14 29 MIN. QNH PRESSURE IN HPA 1012.1 1005.8 1005.4 1001.3 1002.4 996.3 990.6 993.6 998.6 1003.4 1010.4 1006.0 990.6 DAY 26 23 20 25 27 28 15 10 2 1 10 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 BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.8 1013.7 1011.0 1008.0 1005.2 999.7 993.6 995.6 1001.5 1009.1 1015.8 1016.7 1007.3 MAX. QFE PRESSURE IN HPA 1024.0 1021.0 1017.0 1014.9 1010.8 1003.0 998.1 1002.0 1005.2 1014.0 1023.0 1026.8 1026.8 DAY 3 4 15 12 3 3 2 31 14 23 14 29 MIN. QFE PRESSURE IN HPA 1011.8 1004.2 1001.0 999.4 1001.0 994.8 988.9 992.0 996.8 1002.8 1009.3 1005.4 988.9 DAY 25 23 8 25 17 30 15 11 2 1 10 25 MEAN QNH PRESSURE IN HPA 1018.4 1014.3 1011.7 1008.7 1005.8 1000.3 994.2 996.2 1002.1 1009.7 1016.5 1017.3 1007.9 MAX. QNH PRESSURE IN HPA 1024.6 1021.6 1017.6 1015.5 1011.4 1003.6 998.7 1002.6 1005.8 1014.6 1023.6 1027.4 1027.4 DAY 3 4 15 12 3 3 2 31 14 23 14 29 MIN. QNH PRESSURE IN HPA 1012.4 1004.8 1001.6 1000.0 1001.6 995.4 989.5 992.6 997.4 1003.4 1009.9 1006.0 989.5 DAY 25 23 8 25 17 30 15 11 2 1 10 25 MEAN QFF PRESSURE IN HPA 1018.7 1014.6 1012.0 1008.9 1006.0 1000.5 994.4 996.5 1002.4 1010.0 1016.8 1017.6 1008.2 MAX. QFF PRESSURE IN HPA 1025.0 1021.9 1017.9 1015.8 1011.7 1003.9 999.0 1002.9 1006.1 1014.9 1024.0 1027.8 1027.8 DAY 3 4 15 12 3 3 2 31 14 31 14 29 MIN. QFF PRESSURE IN HPA 1012.7 1005.1 1001.9 1000.3 1001.9 995.7 989.7 992.8 997.7 1003.7 1010.2 1006.3 989.7 DAY 25 23 8 25 31 30 15 11 2 1 10 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 BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.4 12.8 19.4 27.6 32.8 36.4 39.9 37.9 33.6 28.7 19.8 12.8 25.9 MINIMUN AIR TEMPERATURE (C) 1.4 3.2 ***** ***** ***** 20.1 23.8 23.0 19.0 16.0 10.8 5.6 ***** DAYS WITH MINIMUM TEMP. >=21 0 0 **** **** **** 11 28 28 9 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 1 0 **** **** **** 0 0 0 0 0 0 0 **** DAYS WITH FREEZING MIN.<= 0 13 11 **** **** **** 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS LOWEST(C) -4.0 -2.5 ***** ***** ***** 16.0 20.0 20.0 14.0 7.5 4.0 0.5 ***** DAY 6 3 ** ** ** 17 6 28 30 24 22 8 MAXIMUM AIR TEMPERATURE (C) 15.2 18.8 24.6 33.2 39.3 44.3 47.6 46.0 42.0 36.2 26.0 18.0 32.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 23 30 30 30 31 30 31 3 0 210 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.5 26.6 30.0 37.5 46.0 50.0 50.0 48.4 46.0 42.0 31.0 25.0 50.0 DAY 10 28 7 27 30 27 19 27 5 4 2 1 DIF. BETWEEN (MAX.-MIN.) (C) 13.8 15.6 ***** ***** ***** 24.2 23.8 23.0 23.0 20.2 15.2 12.4 ***** MEAN DAILY TEMP. (MDT) (C) 8.3 11.0 ***** ***** ***** 32.2 35.7 34.5 30.5 26.1 18.4 11.8 ***** COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.6 115.7 311.7 440.1 404.0 285.7 163.1 6.6 1.5 ****** HEATING DEG. DAYS(BASE 18 0C) 300.7 196.2 13.9 3.0 0.0 0.0 0.0 0.0 0.0 0.0 28.8 197.9 ****** DEWPOINT (MEAN C) 1.9 1.8 8.6 8.1 7.8 10.6 14.1 15.5 15.5 10.1 9.0 6.9 9.2 MIXING RATIO (G/KG) 4.45 4.59 7.16 7.09 7.01 8.45 10.58 12.27 12.37 8.10 7.57 6.41 8.00 VAPOUR PRESSURE (HPA) 7.23 7.45 11.49 11.36 11.20 13.39 16.64 19.16 19.46 12.98 12.21 10.37 12.74 SATURATION DEF. (HPA) 5.30 8.32 11.99 27.51 42.13 52.05 61.75 51.83 36.57 29.29 12.23 5.17 28.68 RELATIVE HUMIDITY (MEAN %) 63 55 54 34 27 25 25 31 38 35 55 71 43 RELATIVE HUMIDITY (MAX. %) 88 85 83 63 54 49 44 51 58 56 79 92 67 RELATIVE HUMIDITY (MIN. %) 41 33 35 19 14 13 15 18 24 20 37 51 27 RELATIVE HUMIDITY (MEAN% 03UTC) 86 83 80 63 51 47 43 47 54 53 78 90 65 RELATIVE HUMIDITY (MEAN% 09UTC) 52 42 48 26 18 16 16 24 31 28 47 63 34 RELATIVE HUMIDITY (MEAN% 15UTC) 54 42 43 23 19 19 19 24 32 29 48 61 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 9.7 45.2 27.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 15.0 61.0 158.2 DAYS WITH PRECIPITATION >=10 0 2 1 0 0 0 0 0 0 0 1 2 6 DAYS WITH PRECIPITATION >= 5 0 4 2 0 0 0 0 0 0 0 1 3 10 DAYS WITH PRECIPITATION >= 1 5 4 4 0 0 0 0 0 0 0 4 7 24 DAYS WITH PRECIPITATION 5 8 4 0 2 0 0 0 0 0 4 7 30 GREATEST DAILY PRECIPITATION 4.0 15.0 20.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 10.0 35.0 35.0 DAY 3 19 15 ** 13 ** ** ** ** ** 12 4 DAY WITH THUNDER STORM 0 0 2 0 1 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 0 0 2 0 7 13 15 20 9 6 1 0 73 WIND DIRECTION (PREVAILING) 270 315 135 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 13.1 6.1 11.8 14.5 15.2 16.5 13.8 14.1 14.6 13.6 10.7 11.7 13.8 PREVAILING WIND PERCENT 16.8 17.1 12.3 11.3 33.5 41.3 33.3 31.6 35.3 21.9 16.0 28.4 24.5 CALMS PERCENT OF WIND 40.6 47.9 47.7 38.7 29.0 25.3 33.3 35.5 46.0 60.0 33.3 37.4 39.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 150 155 150 155 150 155 1820 VECTOR WIND DIRECTION (MEAN) 291 277 190 263 273 269 253 263 268 225 27 286 266 VECTOR WIND MAGNITUDE(KNOTS) 2.4 1.2 1.2 2.0 5.8 10.5 5.8 6.9 6.9 1.9 0.6 3.7 3.8 WIND STEADINESES (MEAN %) 39.3 36.4 17.6 25.3 53.2 89.7 63.0 82.1 92.0 37.3 7.9 49.3 49.4 WIND SPEED (MEAN KNOTS) 6.1 3.3 6.8 7.9 10.9 11.7 9.2 8.4 7.5 5.1 7.6 7.5 7.7 FASTEST WIND DIRECTION 250 250 240 190 300 270 230 240 280 120 100 120 300 FASTEST WIND SPEED (KNOTS) 39 21 39 23 43 29 29 29 31 29 29 29 43 DAY 4 11 10 24 14 1 4 3 10 30 14 12 DAYS WITH SKY CLEAR (0-2)/8 18 15 15 18 22 30 30 29 30 21 10 16 254 DAYS WITH P.CLOUDY (3-6)/8 8 8 8 7 4 0 0 2 0 8 11 9 65 DAYS WITH CLOUDY (7-8)/8 5 5 8 5 5 0 0 0 0 2 9 6 45 DAYS WITH VISIBILITY =< 2 KM 9 1 4 0 1 3 0 0 0 3 3 16 40 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.3 1018.8 1010.6 1010.0 1006.0 1000.2 997.1 997.5 1003.8 1011.3 1017.4 1018.2 1009.1 MAX. QFE PRESSURE IN HPA 1028.5 1024.9 1023.0 1022.0 1015.8 1006.2 1002.2 1002.0 1010.2 1018.9 1023.0 1024.0 1028.5 DAY-HOUR 15- 6 4- 6 31- 9 1- 6 8- 9 12- 6 8- 6 31- 6 24- 6 27- 6 22- 6 18- 6 MIN. QFE PRESSURE IN HPA 1005.4 1007.2 997.0 1001.6 1000.0 994.2 993.0 992.2 998.4 1004.2 1013.2 1012.0 992.2 DAY-HOUR 11-12 22-15 10- 6 12-15 30-12 30-15 30-12 27-15 1-15 11-12 14-12 12-15 MEAN QNH PRESSURE IN HPA 1018.9 1019.5 1011.2 1010.6 1006.6 1000.9 997.7 998.2 1004.4 1011.9 1018.0 1018.8 1009.7 MAX. QNH PRESSURE IN HPA 1029.1 1025.5 1023.6 1022.6 1016.4 1006.8 1002.8 1002.6 1010.8 1019.5 1023.6 1024.6 1029.1 DAY-HOUR 15- 6 4- 6 31- 9 1- 6 8- 9 12- 6 8- 6 31- 6 24- 6 27- 6 22- 6 18- 6 MIN. QNH PRESSURE IN HPA 1006.0 1007.8 997.6 1002.2 1000.6 994.8 993.6 992.8 999.0 1004.8 1013.8 1012.6 992.8 DAY-HOUR 11-12 22-15 10- 6 12-15 30-12 30-15 30-12 27-15 1-15 11-12 14-12 12-15 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 1018.1 1019.1 1010.7 1010.1 1005.8 1000.4 997.0 997.2 1003.6 1011.4 1017.3 1018.4 1009.1 MAX. QFE PRESSURE IN HPA 1023.2 1024.0 1020.8 1021.0 1013.8 1005.0 1002.0 1000.0 1009.0 1018.0 1021.4 1023.0 1024.0 DAY 30 8 31 1 8 12 9 31 30 27 22 18 MIN. QFE PRESSURE IN HPA 1013.8 1012.2 1000.0 1004.2 1001.2 996.0 994.0 992.2 1000.0 1006.2 1013.2 1013.6 992.2 DAY 11 22 10 23 30 16 20 28 6 6 15 4 MEAN QNH PRESSURE IN HPA 1018.8 1019.7 1011.3 1010.8 1006.4 1001.0 997.6 997.9 1004.2 1012.1 1017.9 1019.1 1009.7 MAX. QNH PRESSURE IN HPA 1023.8 1024.6 1021.4 1021.6 1014.4 1005.6 1002.6 1000.6 1009.6 1018.6 1022.0 1023.6 1024.6 DAY 30 8 31 1 8 12 9 31 30 27 22 18 MIN. QNH PRESSURE IN HPA 1014.4 1012.8 1000.6 1004.8 1001.8 996.6 994.6 992.8 1000.6 1006.8 1013.8 1014.2 992.8 DAY 11 22 10 23 30 16 20 28 6 6 15 4 MEAN QFF PRESSURE IN HPA 1019.1 1020.0 1011.6 1011.0 1006.7 1001.2 997.9 998.1 1004.6 1012.3 1018.2 1019.4 1010.0 MAX. QFF PRESSURE IN HPA 1024.2 1025.0 1021.8 1021.9 1014.7 1005.9 1002.9 1000.9 1009.9 1018.9 1022.4 1024.0 1025.0 DAY 30 8 31 1 8 12 9 31 30 27 22 18 MIN. QFF PRESSURE IN HPA 1014.7 1013.1 1000.9 1005.1 1002.1 996.8 994.8 993.1 1000.9 1007.1 1014.1 1014.5 993.1 DAY 11 22 10 23 30 29 20 28 9 6 15 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.6 1020.2 1011.4 1011.5 1006.9 1001.1 997.8 998.4 1004.8 1012.4 1018.4 1019.2 1010.1 MAX. QFE PRESSURE IN HPA 1028.5 1024.9 1022.4 1022.0 1014.8 1006.2 1002.2 1002.0 1010.2 1018.9 1023.0 1024.0 1028.5 DAY 15 4 31 1 8 12 8 31 24 27 22 18 MIN. QFE PRESSURE IN HPA 1012.0 1011.8 997.0 1005.2 1002.2 996.0 995.0 993.2 1000.4 1007.2 1014.2 1013.2 993.2 DAY 11 22 10 23 30 30 20 28 6 6 15 4 MEAN QNH PRESSURE IN HPA 1020.3 1020.8 1012.1 1012.1 1007.5 1001.7 998.4 999.1 1005.5 1013.0 1019.0 1019.9 1010.8 MAX. QNH PRESSURE IN HPA 1029.1 1025.5 1023.0 1022.6 1015.4 1006.8 1002.8 1002.6 1010.8 1019.5 1023.6 1024.6 1029.1 DAY 15 4 31 1 8 12 8 31 24 27 22 18 MIN. QNH PRESSURE IN HPA 1012.6 1012.4 997.6 1005.8 1002.8 996.6 995.6 993.8 1001.0 1007.8 1014.8 1013.8 993.8 DAY 11 22 10 23 30 30 20 28 6 6 15 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.2 1019.8 1011.2 1011.1 1006.8 1000.9 997.7 998.6 1004.7 1012.1 1018.1 1018.7 1009.9 MAX. QFE PRESSURE IN HPA 1024.5 1024.6 1023.0 1020.2 1015.8 1006.2 1002.2 1002.0 1010.0 1017.7 1022.8 1024.0 1024.6 DAY 18 8 31 1 8 12 8 31 24 27 22 18 MIN. QFE PRESSURE IN HPA 1009.4 1010.6 998.0 1004.7 1002.0 996.0 995.0 995.0 1000.0 1006.2 1014.0 1012.2 995.0 DAY 11 22 10 23 30 30 20 25 8 11 16 4 MEAN QNH PRESSURE IN HPA 1019.8 1020.4 1011.9 1011.8 1007.4 1001.5 998.3 999.3 1005.3 1012.8 1018.7 1019.3 1010.5 MAX. QNH PRESSURE IN HPA 1025.1 1025.2 1023.6 1020.8 1016.4 1006.8 1002.8 1002.6 1010.6 1018.3 1023.4 1024.6 1025.2 DAY 18 8 31 1 8 12 8 31 24 27 22 18 MIN. QNH PRESSURE IN HPA 1010.0 1011.2 998.6 1005.3 1002.6 996.6 995.6 995.6 1000.6 1006.8 1014.6 1012.8 995.6 DAY 11 22 10 23 30 30 20 25 8 11 16 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1017.6 1009.9 1009.2 1005.6 999.7 996.9 997.0 1003.2 1010.3 1016.7 1017.3 1008.4 MAX. QFE PRESSURE IN HPA 1022.2 1022.5 1021.0 1019.0 1013.8 1004.8 1001.3 999.4 1008.0 1016.6 1021.2 1023.0 1023.0 DAY 18 8 31 1 8 12 8 11 29 26 21 18 MIN. QFE PRESSURE IN HPA 1005.4 1008.2 1001.7 1003.2 1000.0 995.0 993.0 992.8 999.0 1004.2 1013.2 1012.2 992.8 DAY 11 22 10 23 30 30 30 27 8 11 14 4 MEAN QNH PRESSURE IN HPA 1018.0 1018.3 1010.5 1009.8 1006.2 1000.3 997.5 997.7 1003.8 1010.9 1017.3 1018.0 1009.0 MAX. QNH PRESSURE IN HPA 1022.8 1023.1 1021.6 1019.6 1014.4 1005.4 1001.9 1000.0 1008.6 1017.2 1021.8 1023.6 1023.6 DAY 18 8 31 1 8 12 8 11 29 26 21 18 MIN. QNH PRESSURE IN HPA 1006.0 1008.8 1002.3 1003.8 1000.6 995.6 993.6 993.4 999.6 1004.8 1013.8 1012.8 993.4 DAY 11 22 10 23 30 30 30 27 8 11 14 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.3 1017.6 1009.7 1008.2 1005.0 999.1 996.4 996.4 1002.8 1010.1 1016.6 1017.4 1008.1 MAX. QFE PRESSURE IN HPA 1023.0 1022.0 1020.0 1018.0 1012.8 1004.0 1001.0 999.0 1007.7 1016.2 1021.8 1024.0 1024.0 DAY 18 7 31 1 8 12 8 3 29 27 21 18 MIN. QFE PRESSURE IN HPA 1007.2 1007.2 1003.2 1001.6 1000.0 994.2 993.0 992.2 998.4 1004.2 1013.2 1012.0 992.2 DAY 11 22 9 12 30 30 30 27 1 11 14 12 MEAN QNH PRESSURE IN HPA 1018.0 1018.2 1010.3 1008.8 1005.7 999.8 997.0 997.0 1003.4 1010.7 1017.3 1018.1 1008.7 MAX. QNH PRESSURE IN HPA 1023.6 1022.6 1020.6 1018.6 1013.4 1004.6 1001.6 999.6 1008.3 1016.8 1022.4 1024.6 1024.6 DAY 18 7 31 1 8 12 8 3 29 27 21 18 MIN. QNH PRESSURE IN HPA 1007.8 1007.8 1003.8 1002.2 1000.6 994.8 993.6 992.8 999.0 1004.8 1013.8 1012.6 992.8 DAY 11 22 9 12 30 30 30 27 1 11 14 12 MEAN QFF PRESSURE IN HPA 1018.3 1018.5 1010.6 1009.1 1005.9 1000.0 997.2 997.2 1003.8 1011.0 1017.6 1018.4 1009.0 MAX. QFF PRESSURE IN HPA 1024.0 1023.0 1020.9 1018.9 1013.7 1004.9 1001.9 999.9 1008.6 1017.1 1022.7 1025.0 1025.0 DAY 18 8 31 1 8 12 8 3 29 27 21 18 MIN. QFF PRESSURE IN HPA 1008.1 1008.1 1004.1 1002.5 1000.9 995.1 993.9 993.0 999.2 1005.1 1014.1 1012.9 993.0 DAY 11 22 9 12 30 30 30 27 1 11 16 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 BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.6 14.2 19.6 25.5 33.9 36.9 39.5 37.1 34.0 28.1 21.2 14.9 26.3 MINIMUN AIR TEMPERATURE (C) 3.7 6.1 9.2 14.4 20.0 22.3 25.7 22.6 18.0 15.6 10.6 5.8 14.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 12 22 31 19 0 1 0 0 85 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 7 0 0 0 0 0 0 0 0 0 0 4 11 TEMPERATURE RECORDS LOWEST(C) -3.4 1.6 4.2 9.0 14.0 19.0 21.6 19.0 14.0 10.2 4.0 -3.0 -3.4 DAY 11 7 19 6 8 2 3 23 23 18 14 28 MAXIMUM AIR TEMPERATURE (C) 15.3 19.1 25.6 31.4 40.8 44.6 46.6 45.6 43.0 35.7 28.6 21.3 33.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 20 31 30 31 31 30 31 13 0 219 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.0 23.0 32.0 38.0 47.0 49.4 50.0 50.0 46.0 41.2 33.0 26.8 50.0 DAY 6 18 31 28 22 8 21 15 5 8 3 6 DIF. BETWEEN (MAX.-MIN.) (C) 11.6 13.0 16.4 17.0 20.8 22.3 20.9 23.0 25.0 20.1 18.0 15.5 18.6 MEAN DAILY TEMP. (MDT) (C) 9.5 12.6 17.4 22.9 30.4 33.4 36.1 34.1 30.5 25.7 19.6 13.6 23.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 2.4 73.2 291.4 372.7 469.5 405.9 284.0 145.1 16.0 0.0 2060.2 HEATING DEG. DAYS(BASE 18 0C) 263.6 150.5 39.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.9 144.3 609.3 DEWPOINT (MEAN C) 2.9 3.0 2.5 8.3 9.8 11.3 11.2 8.3 4.8 3.9 4.5 4.9 6.3 MIXING RATIO (G/KG) 4.88 4.92 4.84 7.30 8.28 8.80 8.90 7.36 5.60 5.43 5.62 5.62 6.46 VAPOUR PRESSURE (HPA) 7.92 7.94 7.83 11.70 13.15 13.93 14.02 11.66 8.93 8.74 9.07 9.09 10.33 SATURATION DEF. (HPA) 5.46 8.94 16.41 22.93 44.39 52.60 62.40 56.64 49.25 32.04 17.95 9.16 31.51 RELATIVE HUMIDITY (MEAN %) 63 53 38 39 27 25 21 20 19 25 38 55 35 RELATIVE HUMIDITY (MAX. %) 88 82 69 68 46 49 39 33 33 43 59 79 57 RELATIVE HUMIDITY (MIN. %) 43 33 20 23 16 13 12 11 10 13 22 35 21 RELATIVE HUMIDITY (MEAN% 03UTC) 87 81 65 67 45 48 36 32 33 40 58 78 56 RELATIVE HUMIDITY (MEAN% 09UTC) 54 41 27 29 19 16 15 16 14 22 30 44 27 RELATIVE HUMIDITY (MEAN% 15UTC) 55 41 28 32 23 20 16 15 13 19 34 51 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 12.4 21.9 8.8 11.0 2.0 0.0 0.0 0.0 0.0 3.0 15.5 0.6 75.2 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 1 0 1 DAYS WITH PRECIPITATION >= 5 0 1 1 2 0 0 0 0 0 0 1 0 5 DAYS WITH PRECIPITATION >= 1 6 5 3 2 1 0 0 0 0 1 1 0 19 DAYS WITH PRECIPITATION 9 6 4 2 1 0 0 0 0 1 2 1 26 GREATEST DAILY PRECIPITATION 4.0 9.0 6.0 6.0 2.0 0.0 0.0 0.0 0.0 3.0 15.0 0.6 15.0 DAY 16 11 13 2 12 ** ** ** ** 29 28 25 DAY WITH THUNDER STORM 0 1 0 1 1 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 5 11 5 9 11 13 9 5 1 1 1 73 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 11.9 12.7 15.0 14.0 14.7 15.4 13.3 9.9 7.1 9.0 7.5 8.3 11.6 PREVAILING WIND PERCENT 17.4 20.7 23.2 28.7 32.3 49.3 52.3 58.4 25.3 17.4 41.3 31.6 33.2 CALMS PERCENT OF WIND 49.7 37.9 22.6 22.0 36.1 23.3 26.5 11.7 50.7 58.7 42.0 52.9 36.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 154 150 155 150 155 1824 VECTOR WIND DIRECTION (MEAN) 288 282 276 246 275 271 260 268 288 281 259 267 270 VECTOR WIND MAGNITUDE(KNOTS) 2.3 2.8 3.0 3.8 6.8 10.0 7.3 7.6 3.3 0.9 3.0 1.9 4.3 WIND STEADINESES (MEAN %) 40.4 36.8 27.8 32.5 72.3 89.3 76.8 84.4 89.2 25.0 69.8 50.0 57.3 WIND SPEED (MEAN KNOTS) 5.7 7.6 10.8 11.7 9.4 11.2 9.5 9.0 3.7 3.6 4.3 3.8 7.5 FASTEST WIND DIRECTION 280 150 120 160 280 280 240 240 280 270 180 270 160 FASTEST WIND SPEED (KNOTS) 23 29 29 35 27 29 31 29 23 19 19 16 35 DAY 8 2 6 1 26 13 30 25 22 9 27 8 DAYS WITH SKY CLEAR (0-2)/8 12 17 19 13 25 30 31 31 30 24 17 14 263 DAYS WITH P.CLOUDY (3-6)/8 10 6 8 13 5 0 0 0 0 5 12 15 74 DAYS WITH CLOUDY (7-8)/8 9 5 4 4 1 0 0 0 0 2 1 2 28 DAYS WITH VISIBILITY =< 2 KM 4 0 4 1 0 2 1 0 0 0 0 1 13 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.4 1014.3 1014.8 1009.9 1004.6 999.8 995.9 998.5 1001.9 1010.7 1015.1 1016.7 1008.5 MAX. QFE PRESSURE IN HPA 1028.0 1021.0 1023.0 1016.8 1011.2 1007.2 1002.2 1002.2 1007.2 1019.2 1023.0 1023.2 1028.0 DAY-HOUR 12- 6 12- 6 9- 6 4- 9 7- 6 4- 6 15- 6 16- 6 22- 6 30- 6 14- 6 28- 6 MIN. QFE PRESSURE IN HPA 1008.6 1004.2 1008.2 1002.2 997.9 992.2 991.2 993.0 997.2 1005.0 1007.2 1010.8 991.2 DAY-HOUR 4-15 15-12 31-15 29-15 30-15 30-15 5-15 13-15 5-12 13-15 1-15 10-12 MEAN QNH PRESSURE IN HPA 1020.1 1014.9 1015.4 1010.5 1005.2 1000.4 996.5 999.1 1002.5 1011.3 1015.7 1017.3 1009.1 MAX. QNH PRESSURE IN HPA 1028.6 1021.6 1023.6 1017.4 1011.8 1007.8 1002.8 1002.8 1007.8 1019.8 1023.6 1023.8 1028.6 DAY-HOUR 12- 6 12- 6 9- 6 4- 9 7- 6 4- 6 15- 6 16- 6 22- 6 30- 6 14- 6 28- 6 MIN. QNH PRESSURE IN HPA 1009.2 1004.8 1008.8 1002.8 998.5 992.8 991.8 993.6 997.8 1005.6 1007.8 1011.4 991.8 DAY-HOUR 4-15 15-12 31-15 29-15 30-15 30-15 5-15 13-15 5-12 13-15 1-15 10-12 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 1019.4 1014.2 1014.9 1009.9 1004.6 1000.0 996.0 998.6 1002.0 1010.5 1015.1 1016.7 1008.5 MAX. QFE PRESSURE IN HPA 1027.0 1020.0 1021.0 1015.0 1009.8 1005.4 1001.2 1001.0 1006.2 1018.0 1022.0 1022.2 1027.0 DAY 12 13 9 4 8 4 15 4 22 30 14 28 MIN. QFE PRESSURE IN HPA 1013.0 1005.2 1010.2 1004.4 998.2 995.2 993.2 993.2 998.0 1005.0 1009.0 1011.4 993.2 DAY 1 19 31 15 30 27 5 14 5 14 2 10 MEAN QNH PRESSURE IN HPA 1020.0 1014.8 1015.5 1010.6 1005.2 1000.6 996.7 999.2 1002.6 1011.2 1015.7 1017.3 1009.1 MAX. QNH PRESSURE IN HPA 1027.6 1020.6 1021.6 1015.6 1010.4 1006.0 1001.8 1001.6 1006.8 1018.6 1022.6 1022.8 1027.6 DAY 12 13 9 4 8 4 15 4 22 30 14 28 MIN. QNH PRESSURE IN HPA 1013.6 1005.8 1010.8 1005.0 998.8 995.8 993.8 993.8 998.6 1005.6 1009.6 1012.0 993.8 DAY 1 19 31 15 30 27 5 14 5 14 2 10 MEAN QFF PRESSURE IN HPA 1020.3 1015.1 1015.8 1010.8 1005.5 1000.8 996.9 999.5 1002.8 1011.4 1016.0 1017.6 1009.4 MAX. QFF PRESSURE IN HPA 1028.0 1021.0 1021.9 1015.9 1010.7 1006.3 1002.1 1001.9 1007.1 1018.9 1022.9 1023.2 1028.0 DAY 12 13 9 4 8 4 15 4 22 30 14 28 MIN. QFF PRESSURE IN HPA 1013.9 1006.1 1011.1 1005.3 999.1 996.1 994.1 994.1 998.9 1005.9 1009.9 1012.3 994.1 DAY 1 19 31 15 30 27 5 14 5 14 2 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1020.5 1015.4 1015.8 1010.8 1005.7 1000.8 996.9 999.4 1002.8 1011.7 1016.3 1017.8 1009.5 MAX. QFE PRESSURE IN HPA 1028.0 1021.0 1023.0 1016.6 1011.2 1007.2 1002.2 1002.2 1007.2 1019.2 1023.0 1023.2 1028.0 DAY 12 12 9 4 7 4 15 16 22 30 14 28 MIN. QFE PRESSURE IN HPA 1012.2 1005.2 1011.2 1005.4 999.2 996.0 994.0 995.2 998.4 1006.2 1009.8 1012.8 994.0 DAY 4 15 31 15 30 30 5 14 5 1 2 10 MEAN QNH PRESSURE IN HPA 1021.1 1016.0 1016.5 1011.4 1006.3 1001.5 997.5 1000.0 1003.4 1012.3 1016.9 1018.4 1010.1 MAX. QNH PRESSURE IN HPA 1028.6 1021.6 1023.6 1017.2 1011.8 1007.8 1002.8 1002.8 1007.8 1019.8 1023.6 1023.8 1028.6 DAY 12 12 9 4 7 4 15 16 22 30 14 28 MIN. QNH PRESSURE IN HPA 1012.8 1005.8 1011.8 1006.0 999.8 996.6 994.6 995.8 999.0 1006.8 1010.4 1013.4 994.6 DAY 4 15 31 15 30 30 5 14 5 1 2 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1015.1 1015.7 1010.7 1005.5 1000.5 996.5 999.1 1002.5 1011.3 1015.6 1017.2 1009.1 MAX. QFE PRESSURE IN HPA 1028.0 1021.0 1023.0 1016.8 1011.0 1006.8 1002.2 1001.8 1007.2 1018.2 1022.0 1022.8 1028.0 DAY 12 12 9 4 7 4 15 20 22 30 14 28 MIN. QFE PRESSURE IN HPA 1010.2 1005.2 1012.2 1005.4 999.2 995.1 993.5 995.1 998.2 1006.4 1009.0 1012.2 993.5 DAY 4 15 24 15 30 30 5 14 5 1 1 10 MEAN QNH PRESSURE IN HPA 1020.7 1015.7 1016.3 1011.3 1006.1 1001.1 997.1 999.7 1003.1 1012.0 1016.2 1017.9 1009.8 MAX. QNH PRESSURE IN HPA 1028.6 1021.6 1023.6 1017.4 1011.6 1007.4 1002.8 1002.4 1007.8 1018.8 1022.6 1023.4 1028.6 DAY 12 12 9 4 7 4 15 20 22 30 14 28 MIN. QNH PRESSURE IN HPA 1010.8 1005.8 1012.8 1006.0 999.8 995.7 994.1 995.7 998.8 1007.0 1009.6 1012.8 994.1 DAY 4 15 24 15 30 30 5 14 5 1 1 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.6 1013.4 1014.0 1009.1 1004.0 999.2 995.3 997.8 1001.2 1010.0 1014.2 1015.9 1007.7 MAX. QFE PRESSURE IN HPA 1026.2 1019.2 1021.0 1014.8 1009.0 1005.8 1001.2 1001.8 1005.2 1016.0 1020.4 1021.0 1026.2 DAY 11 12 9 4 7 4 15 20 22 30 14 28 MIN. QFE PRESSURE IN HPA 1009.0 1004.2 1009.2 1003.2 998.0 993.2 992.1 993.1 997.2 1005.2 1007.6 1010.8 992.1 DAY 4 15 31 29 30 30 5 14 5 1 1 10 MEAN QNH PRESSURE IN HPA 1019.3 1014.1 1014.6 1009.8 1004.6 999.9 995.9 998.4 1001.8 1010.7 1014.9 1016.5 1008.4 MAX. QNH PRESSURE IN HPA 1026.8 1019.8 1021.6 1015.4 1009.6 1006.4 1001.8 1002.4 1005.8 1016.6 1021.0 1021.6 1026.8 DAY 11 12 9 4 7 4 15 20 22 30 14 28 MIN. QNH PRESSURE IN HPA 1009.6 1004.8 1009.8 1003.8 998.6 993.8 992.7 993.7 997.8 1005.8 1008.2 1011.4 992.7 DAY 4 15 31 29 30 30 5 14 5 1 1 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.7 1013.5 1013.7 1008.9 1003.2 998.5 994.8 997.5 1001.1 1009.8 1014.2 1016.0 1007.5 MAX. QFE PRESSURE IN HPA 1026.2 1019.2 1020.2 1014.2 1008.2 1005.0 1001.2 1001.6 1005.2 1015.4 1021.0 1022.0 1026.2 DAY 11 12 9 4 7 4 15 5 22 30 14 28 MIN. QFE PRESSURE IN HPA 1008.6 1007.0 1008.2 1002.2 997.9 992.2 991.2 993.0 997.2 1005.0 1007.2 1011.2 991.2 DAY 4 15 31 29 30 30 5 13 5 13 1 10 MEAN QNH PRESSURE IN HPA 1019.4 1014.1 1014.3 1009.5 1003.8 999.1 995.4 998.1 1001.7 1010.4 1014.8 1016.7 1008.1 MAX. QNH PRESSURE IN HPA 1026.8 1019.8 1020.8 1014.8 1008.8 1005.6 1001.8 1002.2 1005.8 1016.0 1021.6 1022.6 1026.8 DAY 11 12 9 4 7 4 15 5 22 30 14 28 MIN. QNH PRESSURE IN HPA 1009.2 1007.6 1008.8 1002.8 998.5 992.8 991.8 993.6 997.8 1005.6 1007.8 1011.8 991.8 DAY 4 15 31 29 30 30 5 13 5 13 1 10 MEAN QFF PRESSURE IN HPA 1019.7 1014.4 1014.6 1009.8 1004.0 999.4 995.6 998.3 1002.0 1010.7 1015.1 1017.0 1008.4 MAX. QFF PRESSURE IN HPA 1027.2 1020.1 1021.1 1015.1 1009.1 1005.9 1002.1 1002.4 1006.1 1016.3 1022.0 1023.0 1027.2 DAY 11 12 9 4 7 4 15 5 22 30 14 28 MIN. QFF PRESSURE IN HPA 1009.5 1007.9 1009.1 1003.1 998.8 993.1 992.1 993.9 998.1 1005.9 1008.1 1012.1 992.1 DAY 4 15 31 29 30 30 5 13 5 13 1 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.3 13.1 18.2 25.9 29.7 35.5 36.9 36.0 32.8 27.3 20.8 13.5 25.1 MINIMUN AIR TEMPERATURE (C) 6.1 5.6 11.1 14.9 16.7 21.2 22.9 23.1 19.2 17.1 10.9 8.4 14.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 15 25 27 10 1 0 0 83 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 4 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS LOWEST(C) 0.6 -1.8 4.0 9.4 10.2 15.6 19.4 18.2 12.4 11.4 4.0 0.6 -1.8 DAY 29 10 11 14 12 1 16 30 16 24 27 19 MAXIMUM AIR TEMPERATURE (C) 15.3 18.1 22.9 32.1 36.5 43.0 44.8 43.4 41.0 33.6 27.3 18.0 31.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 20 31 30 31 31 30 27 4 0 205 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.4 21.4 30.2 39.2 40.0 48.0 49.0 47.2 43.6 40.2 34.0 24.2 49.0 DAY 31 15 31 27 9 24 21 9 15 13 1 12 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 12.5 11.8 17.2 19.8 21.8 21.9 20.3 21.8 16.5 16.4 9.6 16.5 MEAN DAILY TEMP. (MDT) (C) 10.7 11.9 17.0 23.5 26.6 32.1 33.8 33.2 30.1 25.4 19.1 13.2 23.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.7 82.0 173.9 332.6 398.0 379.2 272.7 134.9 21.5 0.0 1796.5 HEATING DEG. DAYS(BASE 18 0C) 225.8 171.8 56.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25.9 154.7 634.8 DEWPOINT (MEAN C) 7.6 5.3 10.5 11.1 8.9 16.0 16.5 16.8 15.1 13.1 9.2 8.7 11.6 MIXING RATIO (G/KG) 6.63 5.90 8.10 8.59 7.59 12.37 12.37 12.56 11.81 9.72 7.48 7.28 9.20 VAPOUR PRESSURE (HPA) 10.70 9.53 12.99 13.74 12.11 19.42 19.38 19.73 18.67 15.57 12.05 11.73 14.64 SATURATION DEF. (HPA) 3.15 6.29 8.83 21.72 32.19 42.39 47.54 43.30 34.88 22.82 14.27 4.53 23.49 RELATIVE HUMIDITY (MEAN %) 80 63 64 44 32 36 33 35 39 47 50 74 50 RELATIVE HUMIDITY (MAX. %) 92 86 89 70 58 61 55 58 63 71 74 90 72 RELATIVE HUMIDITY (MIN. %) 65 43 45 27 19 22 21 23 24 30 34 58 34 RELATIVE HUMIDITY (MEAN% 03UTC) 92 84 86 70 57 57 55 56 60 70 74 89 71 RELATIVE HUMIDITY (MEAN% 09UTC) 75 53 55 35 22 28 25 27 33 35 40 67 41 RELATIVE HUMIDITY (MEAN% 15UTC) 78 56 54 38 24 31 27 32 33 44 45 73 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 101.3 75.4 116.3 13.0 0.0 0.0 0.0 0.0 0.0 25.0 0.0 65.7 396.7 DAYS WITH PRECIPITATION >=10 2 2 6 0 0 0 0 0 0 1 0 4 15 DAYS WITH PRECIPITATION >= 5 2 4 7 1 0 0 0 0 0 2 0 4 20 DAYS WITH PRECIPITATION >= 1 5 6 8 4 0 0 0 0 0 4 0 10 37 DAYS WITH PRECIPITATION 7 7 10 4 0 0 0 0 0 6 0 11 45 GREATEST DAILY PRECIPITATION 79.0 44.0 32.0 6.0 0.0 0.0 0.0 0.0 0.0 10.0 0.0 18.0 79.0 DAY 14 21 13 18 ** ** ** ** ** 1 ** 9 DAY WITH THUNDER STORM 1 1 1 1 0 0 0 0 0 2 0 4 10 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 2 0 2 11 8 19 19 8 2 1 0 72 WIND DIRECTION (PREVAILING) 270 270 315 270 270 270 270 270 270 270 90 270 270 PREVAILING WIND SPEED(KNOTS) 7.2 8.6 7.7 7.5 8.2 10.1 10.5 8.4 8.0 6.6 7.3 7.3 8.4 PREVAILING WIND PERCENT 23.2 32.1 16.8 28.0 58.0 41.3 54.8 35.5 30.0 21.9 15.3 16.0 30.8 CALMS PERCENT OF WIND 53.5 46.4 42.6 42.0 32.0 18.7 12.3 18.1 42.7 50.3 50.7 38.7 37.2 NO. OF WIND OBSERVATION 155 140 155 150 150 150 155 155 150 155 150 150 1815 VECTOR WIND DIRECTION (MEAN) 292 265 285 275 266 270 275 264 282 297 116 351 275 VECTOR WIND MAGNITUDE(KNOTS) 1.6 1.8 1.0 1.8 5.3 4.6 8.4 5.7 2.9 1.8 0.2 1.3 2.9 WIND STEADINESES (MEAN %) 43.2 38.3 20.4 38.3 94.6 56.8 92.3 74.0 64.4 51.4 5.4 27.7 53.7 WIND SPEED (MEAN KNOTS) 3.7 4.7 4.9 4.7 5.6 8.1 9.1 7.7 4.5 3.5 3.7 4.7 5.4 FASTEST WIND DIRECTION 90 310 120 100 270 280 280 190 300 280 70 180 300 FASTEST WIND SPEED (KNOTS) 16 16 19 19 19 19 19 19 23 16 19 21 23 DAY 2 4 5 18 17 5 8 9 7 29 30 12 DAYS WITH SKY CLEAR (0-2)/8 3 10 9 8 16 20 31 31 26 16 19 10 199 DAYS WITH P.CLOUDY (3-6)/8 16 11 13 11 10 9 0 0 4 10 9 5 98 DAYS WITH CLOUDY (7-8)/8 12 7 9 11 4 1 0 0 0 5 2 15 66 DAYS WITH VISIBILITY =< 2 KM 16 5 2 0 3 2 2 3 0 0 0 7 40 DURATION OF SUNSHINE HOURS 72.4 101.6 141.5 202.1 267.9 316.6 336.6 318.9 277.9 221.8 222.1 120.4 2599.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.6 1016.3 1011.6 1009.4 1006.0 999.5 995.5 998.1 1005.0 1012.4 1015.6 1016.3 1008.5 MAX. QFE PRESSURE IN HPA 1025.2 1025.2 1019.0 1016.0 1010.0 1007.1 1002.0 1003.4 1011.2 1018.8 1021.0 1023.0 1025.2 DAY-HOUR 28- 6 15- 9 8- 6 14- 6 23- 3 1- 6 2- 6 31- 6 29- 6 18- 6 27- 6 17- 6 MIN. QFE PRESSURE IN HPA 1008.2 1007.6 1003.2 1003.8 1000.0 992.0 990.6 992.6 999.0 1007.2 1007.2 1006.2 990.6 DAY-HOUR 31-12 7-12 6- 3 28-15 16-15 19- 3 13-15 1-15 3-12 14-12 4-12 25-12 MEAN QNH PRESSURE IN HPA 1017.2 1016.9 1012.3 1010.0 1006.6 1000.1 996.2 998.7 1005.6 1013.0 1016.3 1016.9 1009.1 MAX. QNH PRESSURE IN HPA 1025.8 1025.8 1019.6 1016.6 1010.6 1007.7 1002.6 1004.0 1011.8 1019.4 1021.6 1023.6 1025.8 DAY-HOUR 28- 6 15- 9 8- 6 14- 6 23- 3 1- 6 2- 6 31- 6 29- 6 18- 6 27- 6 17- 6 MIN. QNH PRESSURE IN HPA 1008.8 1008.2 1003.8 1004.4 1000.6 992.6 991.2 993.2 999.6 1007.8 1007.8 1006.8 991.2 DAY-HOUR 31-12 7-12 6- 3 28-15 16-15 19- 3 13-15 1-15 3-12 14-12 4-12 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 1016.5 1016.3 1011.6 1009.5 1006.0 999.8 995.8 998.4 1005.2 1012.4 1015.7 1016.4 1008.6 MAX. QFE PRESSURE IN HPA 1024.2 1024.0 1018.2 1015.2 1010.0 1005.6 1001.0 1002.2 1010.0 1018.0 1020.0 1021.8 1024.2 DAY 28 16 8 14 23 1 2 31 29 20 27 17 MIN. QFE PRESSURE IN HPA 1011.0 1010.2 1003.2 1005.0 1003.0 992.0 992.0 994.2 1000.0 1007.8 1010.2 1010.0 992.0 DAY 14 8 6 9 28 19 14 1 3 10 4 9 MEAN QNH PRESSURE IN HPA 1017.2 1017.0 1012.2 1010.1 1006.6 1000.4 996.4 999.0 1005.9 1013.0 1016.4 1017.1 1009.3 MAX. QNH PRESSURE IN HPA 1024.8 1024.6 1018.8 1015.8 1010.6 1006.2 1001.6 1002.8 1010.6 1018.6 1020.6 1022.4 1024.8 DAY 28 16 8 14 23 1 2 31 29 20 27 17 MIN. QNH PRESSURE IN HPA 1011.6 1010.8 1003.8 1005.6 1003.6 992.6 992.6 994.8 1000.6 1008.4 1010.8 1010.6 992.6 DAY 14 8 6 9 28 19 14 1 3 10 4 9 MEAN QFF PRESSURE IN HPA 1017.5 1017.3 1012.5 1010.4 1006.9 1000.5 996.7 999.3 1006.1 1013.3 1016.6 1017.4 1009.5 MAX. QFF PRESSURE IN HPA 1025.2 1024.9 1019.1 1016.1 1010.9 1004.8 1001.9 1003.1 1010.9 1018.9 1021.0 1022.8 1025.2 DAY 28 16 8 14 23 23 2 31 30 20 27 17 MIN. QFF PRESSURE IN HPA 1011.9 1011.1 1004.1 1005.9 1003.9 992.8 992.9 995.1 1000.9 1008.7 1011.1 1010.9 992.8 DAY 14 8 6 29 28 19 14 1 3 10 4 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.5 1017.4 1012.9 1010.5 1006.7 1000.4 996.5 999.3 1006.4 1013.7 1017.0 1017.3 1009.6 MAX. QFE PRESSURE IN HPA 1025.2 1025.0 1019.0 1016.0 1009.8 1007.1 1002.0 1003.4 1011.2 1018.8 1021.0 1023.0 1025.2 DAY 28 15 8 14 24 1 2 31 29 18 27 17 MIN. QFE PRESSURE IN HPA 1011.2 1011.0 1004.2 1005.4 1003.1 993.0 993.0 994.8 1001.3 1009.2 1011.4 1011.0 993.0 DAY 25 3 6 9 27 19 13 1 3 1 4 12 MEAN QNH PRESSURE IN HPA 1018.2 1018.0 1013.5 1011.1 1007.4 1001.0 997.1 999.9 1007.0 1014.3 1017.6 1017.9 1010.3 MAX. QNH PRESSURE IN HPA 1025.8 1025.6 1019.6 1016.6 1010.4 1007.7 1002.6 1004.0 1011.8 1019.4 1021.6 1023.6 1025.8 DAY 28 15 8 14 24 1 2 31 29 18 27 17 MIN. QNH PRESSURE IN HPA 1011.8 1011.6 1004.8 1006.0 1003.7 993.6 993.6 995.4 1001.9 1009.8 1012.0 1011.6 993.6 DAY 25 3 6 9 27 19 13 1 3 1 4 12 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 1017.1 1017.0 1012.6 1010.2 1006.7 1000.0 996.4 998.8 1005.8 1013.0 1016.3 1016.7 1009.2 MAX. QFE PRESSURE IN HPA 1024.2 1025.2 1018.9 1016.0 1009.8 1005.6 1001.4 1002.8 1011.0 1017.2 1020.4 1022.4 1025.2 DAY 28 15 8 14 8 1 2 31 29 20 27 29 MIN. QFE PRESSURE IN HPA 1011.2 1009.0 1006.0 1005.8 1003.4 993.0 993.0 994.2 1000.9 1008.6 1009.9 1007.4 993.0 DAY 25 3 6 4 28 19 13 1 3 14 4 25 MEAN QNH PRESSURE IN HPA 1017.7 1017.6 1013.2 1010.8 1007.3 1000.6 997.0 999.4 1006.4 1013.7 1016.9 1017.3 1009.8 MAX. QNH PRESSURE IN HPA 1024.8 1025.8 1019.5 1016.6 1010.4 1006.2 1002.0 1003.4 1011.6 1017.8 1021.0 1023.0 1025.8 DAY 28 15 8 14 8 1 2 31 29 20 27 29 MIN. QNH PRESSURE IN HPA 1011.8 1009.6 1006.6 1006.4 1004.0 993.6 993.6 994.8 1001.5 1009.2 1010.5 1008.0 993.6 DAY 25 3 6 4 28 19 13 1 3 14 4 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 1015.6 1015.4 1010.8 1008.7 1005.5 998.9 994.9 997.3 1004.0 1011.4 1014.5 1015.4 1007.7 MAX. QFE PRESSURE IN HPA 1023.1 1023.2 1016.8 1015.0 1008.2 1004.0 1000.6 1001.2 1008.9 1015.2 1018.9 1021.0 1023.2 DAY 28 15 8 14 24 1 2 30 29 19 26 29 MIN. QFE PRESSURE IN HPA 1008.2 1007.6 1004.2 1004.2 1001.8 992.0 991.2 992.8 999.0 1007.2 1007.2 1006.2 991.2 DAY 31 7 24 26 16 19 13 1 3 14 4 25 MEAN QNH PRESSURE IN HPA 1016.3 1016.0 1011.4 1009.4 1006.1 999.6 995.6 998.0 1004.6 1012.0 1015.1 1016.0 1008.3 MAX. QNH PRESSURE IN HPA 1023.7 1023.8 1017.4 1015.6 1008.8 1004.6 1001.2 1001.8 1009.5 1015.8 1019.5 1021.6 1023.8 DAY 28 15 8 14 24 1 2 30 29 19 26 29 MIN. QNH PRESSURE IN HPA 1008.8 1008.2 1004.8 1004.8 1002.4 992.6 991.8 993.4 999.6 1007.8 1007.8 1006.8 991.8 DAY 31 7 24 26 16 19 13 1 3 14 4 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 BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.0 1015.3 1010.5 1008.0 1004.9 998.2 994.2 996.8 1003.7 1011.4 1014.7 1015.8 1007.5 MAX. QFE PRESSURE IN HPA 1023.0 1023.0 1016.1 1013.6 1008.0 1002.6 999.0 1001.0 1009.2 1015.6 1019.2 1021.2 1023.0 DAY 28 15 8 13 24 1 2 30 28 20 26 29 MIN. QFE PRESSURE IN HPA 1008.2 1008.0 1004.2 1003.8 1000.0 992.0 990.6 992.6 999.0 1007.2 1007.2 1009.2 990.6 DAY 31 7 23 28 16 19 13 1 3 14 4 25 MEAN QNH PRESSURE IN HPA 1016.7 1016.0 1011.1 1008.6 1005.5 998.9 994.8 997.4 1004.3 1012.0 1015.3 1016.5 1008.1 MAX. QNH PRESSURE IN HPA 1023.6 1023.6 1016.7 1014.2 1008.6 1003.2 999.6 1001.6 1009.8 1016.2 1019.8 1021.8 1023.6 DAY 28 15 8 13 24 1 2 30 28 20 26 29 MIN. QNH PRESSURE IN HPA 1008.8 1008.6 1004.8 1004.4 1000.6 992.6 991.2 993.2 999.6 1007.8 1007.8 1009.8 991.2 DAY 31 7 23 28 16 19 13 1 3 14 4 25 MEAN QFF PRESSURE IN HPA 1017.0 1016.3 1011.4 1008.9 1005.8 999.1 995.0 997.7 1004.5 1012.3 1015.6 1016.8 1008.4 MAX. QFF PRESSURE IN HPA 1024.0 1024.0 1017.0 1014.5 1008.9 1003.5 999.9 1001.9 1010.1 1016.5 1020.1 1022.2 1024.0 DAY 28 15 8 13 24 1 2 30 28 20 26 29 MIN. QFF PRESSURE IN HPA 1009.1 1008.9 1005.1 1004.7 1000.9 992.9 991.5 993.4 999.9 1008.1 1008.1 1010.1 991.5 DAY 31 7 23 28 16 19 13 1 3 14 4 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 BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.3 12.4 15.6 23.3 29.9 35.8 36.1 36.2 33.8 26.7 18.8 12.1 24.2 MINIMUN AIR TEMPERATURE (C) 3.7 6.3 9.1 14.9 20.2 23.5 23.5 23.9 20.2 13.3 11.1 7.6 14.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 13 27 28 30 15 0 0 0 114 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS LOWEST(C) -1.8 1.6 2.4 10.4 16.4 19.6 18.0 19.2 13.4 7.4 1.0 0.6 -1.8 DAY 6 12 12 1 13 6 13 27 30 28 27 29 MAXIMUM AIR TEMPERATURE (C) 14.1 17.0 19.7 28.9 35.2 41.8 43.5 43.3 41.5 34.9 24.3 15.5 30.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 13 29 30 31 31 30 31 5 0 200 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.8 22.4 24.4 37.2 43.4 44.6 49.0 46.0 45.0 40.4 32.8 23.6 49.0 DAY 17 24 29 28 31 16 17 17 2 5 5 1 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 10.7 10.6 14.0 15.0 18.3 20.0 19.4 21.3 21.6 13.2 7.9 15.2 MEAN DAILY TEMP. (MDT) (C) 8.9 11.7 14.4 21.9 27.7 32.7 33.5 33.6 30.9 24.1 17.7 11.5 22.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 48.7 202.5 349.9 387.7 389.7 295.6 97.1 5.1 0.0 1776.3 HEATING DEG. DAYS(BASE 18 0C) 280.7 185.1 111.5 1.6 0.0 0.0 0.0 0.0 0.0 0.0 49.2 200.8 828.9 DEWPOINT (MEAN C) 3.6 4.0 6.3 11.5 11.9 14.1 15.4 17.1 13.1 8.5 11.3 8.7 10.5 MIXING RATIO (G/KG) 5.04 5.19 6.29 8.75 9.02 10.52 11.45 13.00 9.94 7.14 8.81 7.19 8.53 VAPOUR PRESSURE (HPA) 8.18 8.41 10.15 13.99 14.38 16.64 18.01 20.42 15.79 11.47 14.18 11.63 13.60 SATURATION DEF. (HPA) 3.99 6.62 8.15 15.82 29.80 44.67 45.43 42.98 40.94 26.39 8.95 3.01 23.06 RELATIVE HUMIDITY (MEAN %) 70 59 58 50 37 30 32 36 32 36 66 81 49 RELATIVE HUMIDITY (MAX. %) 90 80 81 74 63 51 54 59 55 59 86 94 71 RELATIVE HUMIDITY (MIN. %) 49 41 42 33 22 20 21 22 18 20 48 67 34 RELATIVE HUMIDITY (MEAN% 03UTC) 88 80 80 73 63 50 54 59 55 59 86 92 70 RELATIVE HUMIDITY (MEAN% 09UTC) 60 50 49 39 27 22 25 28 22 26 56 79 40 RELATIVE HUMIDITY (MEAN% 15UTC) 66 54 53 47 33 27 28 31 31 32 63 77 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 23.6 22.0 49.4 8.5 6.0 0.0 0.0 0.0 0.0 0.0 60.0 116.2 285.7 DAYS WITH PRECIPITATION >=10 0 1 2 0 0 0 0 0 0 0 3 5 11 DAYS WITH PRECIPITATION >= 5 2 2 5 1 0 0 0 0 0 0 4 6 20 DAYS WITH PRECIPITATION >= 1 5 6 7 2 2 0 0 0 0 0 7 11 40 DAYS WITH PRECIPITATION 8 6 9 4 2 1 0 0 0 0 8 11 49 GREATEST DAILY PRECIPITATION 7.4 11.0 16.0 7.0 4.0 0.0 0.0 0.0 0.0 0.0 22.6 28.0 28.0 DAY 11 25 15 22 9 ** ** ** ** ** 8 15 DAY WITH THUNDER STORM 0 0 0 3 2 1 0 0 0 0 2 0 8 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 4 10 1 2 8 11 12 6 2 5 2 1 64 WIND DIRECTION (PREVAILING) 270 315 315 270 270 270 270 270 270 270 315 315 270 PREVAILING WIND SPEED(KNOTS) 7.2 6.9 6.5 7.8 8.5 9.6 10.7 9.8 8.3 7.9 9.6 9.5 8.8 PREVAILING WIND PERCENT 13.5 13.1 19.4 16.7 20.6 30.2 41.3 31.0 20.0 22.1 20.0 26.5 20.1 CALMS PERCENT OF WIND 54.8 51.0 37.4 40.7 43.9 28.9 20.6 25.8 35.3 56.5 46.7 45.2 40.5 NO. OF WIND OBSERVATION 155 145 155 150 155 149 155 155 150 154 150 155 1828 VECTOR WIND DIRECTION (MEAN) 299 243 298 224 253 275 272 269 277 274 322 336 275 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.7 1.5 1.4 2.0 4.7 6.4 4.7 2.0 2.8 1.1 1.5 2.3 WIND STEADINESES (MEAN %) 19.4 17.5 34.9 31.1 42.6 72.3 84.2 71.2 35.7 80.0 21.6 27.8 45.1 WIND SPEED (MEAN KNOTS) 3.1 4.0 4.3 4.5 4.7 6.5 7.6 6.6 5.6 3.5 5.1 5.4 5.1 FASTEST WIND DIRECTION 250 180 280 150 70 300 300 270 140 300 240 120 240 FASTEST WIND SPEED (KNOTS) 25 23 19 21 19 23 21 23 17 19 29 21 29 DAY 2 24 9 14 6 20 18 25 10 15 13 15 DAYS WITH SKY CLEAR (0-2)/8 18 14 14 11 14 23 31 31 29 30 13 9 237 DAYS WITH P.CLOUDY (3-6)/8 6 13 13 14 10 3 0 0 1 1 8 14 83 DAYS WITH CLOUDY (7-8)/8 7 2 4 5 6 4 0 0 0 0 9 8 45 DAYS WITH VISIBILITY =< 2 KM 6 6 3 0 2 2 1 2 0 0 3 11 36 DURATION OF SUNSHINE HOURS 171.0 170.3 231.2 223.0 182.8 223.7 295.6 314.8 296.8 290.1 182.9 137.0 2719.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.7 1017.0 1015.6 1010.0 1007.4 1001.5 997.3 999.3 1005.3 1011.1 1017.3 1018.8 1010.0 MAX. QFE PRESSURE IN HPA 1030.0 1026.0 1023.8 1014.8 1015.9 1008.0 1003.2 1002.5 1012.3 1018.1 1024.4 1026.7 1030.0 DAY-HOUR 4- 6 12- 6 12- 6 8- 6 14- 6 11- 6 6- 6 12- 6 29- 6 30- 6 28- 3 28- 6 MIN. QFE PRESSURE IN HPA 1004.0 1005.1 1001.8 1000.6 999.8 993.9 991.6 994.0 998.7 1004.4 1011.2 1011.3 991.6 DAY-HOUR 30-12 24-12 30-15 17-15 8-15 28-15 19-15 18-15 4-15 6-15 22-12 3- 3 MEAN QNH PRESSURE IN HPA 1020.3 1017.6 1016.2 1010.7 1008.0 1002.1 997.9 999.9 1005.9 1011.7 1018.0 1019.4 1010.6 MAX. QNH PRESSURE IN HPA 1030.6 1026.6 1024.4 1015.4 1016.5 1008.6 1003.8 1003.1 1012.9 1018.7 1025.0 1027.3 1030.6 DAY-HOUR 4- 6 12- 6 12- 6 8- 6 14- 6 11- 6 6- 6 12- 6 29- 6 30- 6 28- 3 28- 6 MIN. QNH PRESSURE IN HPA 1004.6 1005.7 1002.4 1001.2 1000.4 994.5 992.2 994.6 999.3 1005.0 1011.8 1011.9 992.2 DAY-HOUR 30-12 24-12 30-15 17-15 8-15 28-15 19-15 18-15 4-15 6-15 22-12 3- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1016.8 1015.5 1010.2 1007.5 1001.5 997.3 999.2 1005.2 1011.1 1017.2 1018.5 1010.0 MAX. QFE PRESSURE IN HPA 1027.6 1024.0 1022.0 1013.2 1014.8 1007.0 1002.8 1001.8 1011.2 1016.1 1024.4 1024.4 1027.6 DAY 4 12 12 12 14 6 6 31 29 29 28 28 MIN. QFE PRESSURE IN HPA 1013.0 1005.8 1003.2 1005.0 1002.6 995.0 992.1 995.6 999.9 1005.8 1013.2 1011.3 992.1 DAY 30 24 31 24 9 28 19 18 4 7 8 3 MEAN QNH PRESSURE IN HPA 1020.3 1017.4 1016.1 1010.8 1008.1 1002.1 997.9 999.9 1005.8 1011.7 1017.9 1019.1 1010.6 MAX. QNH PRESSURE IN HPA 1028.2 1024.6 1022.6 1013.8 1015.4 1007.6 1003.4 1002.4 1011.8 1016.7 1025.0 1025.0 1028.2 DAY 4 12 12 12 14 6 6 31 29 29 28 28 MIN. QNH PRESSURE IN HPA 1013.6 1006.4 1003.8 1005.6 1003.2 995.6 992.7 996.2 1000.5 1006.4 1013.8 1011.9 992.7 DAY 30 24 31 24 9 28 19 18 4 7 8 3 MEAN QFF PRESSURE IN HPA 1020.8 1017.7 1016.4 1011.1 1008.3 1002.4 998.2 1000.1 1006.1 1012.0 1018.2 1019.5 1010.9 MAX. QFF PRESSURE IN HPA 1028.6 1025.0 1023.0 1014.1 1015.7 1007.9 1003.7 1002.7 1012.1 1017.0 1025.4 1025.4 1028.6 DAY 4 12 12 12 14 6 6 31 29 29 28 28 MIN. QFF PRESSURE IN HPA 1013.9 1006.7 1004.1 1005.9 1003.5 995.9 993.0 996.5 1000.8 1006.7 1014.1 1012.2 993.0 DAY 30 24 31 24 9 28 19 18 4 7 8 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1021.0 1018.1 1016.8 1011.4 1008.5 1002.4 998.2 1000.3 1006.5 1012.4 1018.7 1019.9 1011.2 MAX. QFE PRESSURE IN HPA 1030.0 1026.0 1023.8 1014.8 1015.9 1008.0 1003.2 1002.5 1012.3 1018.1 1024.3 1026.7 1030.0 DAY 4 12 12 8 14 11 6 12 29 30 28 28 MIN. QFE PRESSURE IN HPA 1012.0 1006.0 1005.8 1005.4 1004.0 995.8 992.9 996.6 1001.4 1007.2 1014.4 1012.5 992.9 DAY 30 24 30 24 9 28 19 18 4 6 22 3 MEAN QNH PRESSURE IN HPA 1021.6 1018.7 1017.4 1012.0 1009.1 1003.0 998.8 1001.0 1007.1 1013.1 1019.3 1020.5 1011.8 MAX. QNH PRESSURE IN HPA 1030.6 1026.6 1024.4 1015.4 1016.5 1008.6 1003.8 1003.1 1012.9 1018.7 1024.9 1027.3 1030.6 DAY 4 12 12 8 14 11 6 12 29 30 28 28 MIN. QNH PRESSURE IN HPA 1012.6 1006.6 1006.4 1006.0 1004.6 996.4 993.5 997.2 1002.0 1007.8 1015.0 1013.1 993.5 DAY 30 24 30 24 9 28 19 18 4 6 22 3 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 1020.3 1017.8 1016.5 1010.8 1008.1 1002.2 998.0 1000.0 1006.2 1011.7 1018.0 1019.4 1010.7 MAX. QFE PRESSURE IN HPA 1029.9 1025.4 1023.2 1014.2 1015.7 1008.0 1002.9 1002.4 1011.5 1016.9 1023.5 1026.7 1029.9 DAY 4 12 12 8 14 11 6 12 26 29 28 28 MIN. QFE PRESSURE IN HPA 1008.2 1006.2 1005.0 1004.2 1002.6 995.4 993.3 995.5 1001.1 1006.6 1013.0 1013.2 993.3 DAY 30 24 30 17 9 28 19 18 4 6 22 15 MEAN QNH PRESSURE IN HPA 1020.9 1018.4 1017.1 1011.4 1008.7 1002.8 998.7 1000.6 1006.8 1012.4 1018.7 1020.0 1011.4 MAX. QNH PRESSURE IN HPA 1030.5 1026.0 1023.8 1014.8 1016.3 1008.6 1003.5 1003.0 1012.1 1017.5 1024.1 1027.3 1030.5 DAY 4 12 12 8 14 11 6 12 26 29 28 28 MIN. QNH PRESSURE IN HPA 1008.8 1006.8 1005.6 1004.8 1003.2 996.0 993.9 996.1 1001.7 1007.2 1013.6 1013.8 993.9 DAY 30 24 30 17 9 28 19 18 4 6 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 1018.6 1016.0 1014.6 1009.1 1006.7 1001.0 996.7 998.7 1004.6 1010.1 1016.4 1018.0 1009.2 MAX. QFE PRESSURE IN HPA 1028.2 1023.2 1021.4 1013.8 1013.9 1006.8 1002.3 1001.7 1010.2 1015.3 1021.9 1025.5 1028.2 DAY 4 12 12 8 14 10 6 13 26 29 29 28 MIN. QFE PRESSURE IN HPA 1004.0 1005.1 1003.2 1002.9 1000.0 994.2 992.3 994.2 999.3 1004.6 1011.2 1011.8 992.3 DAY 30 24 30 17 9 28 19 18 4 6 22 15 MEAN QNH PRESSURE IN HPA 1019.2 1016.7 1015.3 1009.7 1007.3 1001.6 997.4 999.4 1005.2 1010.7 1017.1 1018.6 1009.8 MAX. QNH PRESSURE IN HPA 1028.8 1023.8 1022.0 1014.4 1014.5 1007.4 1002.9 1002.3 1010.8 1015.9 1022.5 1026.1 1028.8 DAY 4 12 12 8 14 10 6 13 26 29 29 28 MIN. QNH PRESSURE IN HPA 1004.6 1005.7 1003.8 1003.5 1000.6 994.8 992.9 994.8 999.9 1005.2 1011.8 1012.4 992.9 DAY 30 24 30 17 9 28 19 18 4 6 22 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.9 1016.3 1014.6 1008.8 1006.3 1000.3 996.2 998.0 1004.2 1010.0 1016.4 1018.2 1009.0 MAX. QFE PRESSURE IN HPA 1028.0 1023.6 1020.6 1013.2 1013.9 1006.8 1001.8 1001.2 1010.4 1015.4 1021.8 1025.9 1028.0 DAY 5 12 12 8 13 5 6 31 28 29 28 28 MIN. QFE PRESSURE IN HPA 1004.4 1007.0 1001.8 1000.6 999.8 993.9 991.6 994.0 998.7 1004.4 1011.4 1012.7 991.6 DAY 30 24 30 17 8 28 19 18 4 6 22 15 MEAN QNH PRESSURE IN HPA 1019.5 1016.9 1015.2 1009.5 1006.9 1000.9 996.8 998.7 1004.8 1010.7 1017.0 1018.8 1009.6 MAX. QNH PRESSURE IN HPA 1028.6 1024.2 1021.2 1013.8 1014.5 1007.4 1002.4 1001.8 1011.0 1016.0 1022.4 1026.5 1028.6 DAY 5 12 12 8 13 5 6 31 28 29 28 28 MIN. QNH PRESSURE IN HPA 1005.0 1007.6 1002.4 1001.2 1000.4 994.5 992.2 994.6 999.3 1005.0 1012.0 1013.3 992.2 DAY 30 24 30 17 8 28 19 18 4 6 22 15 MEAN QFF PRESSURE IN HPA 1019.8 1017.3 1015.5 1009.7 1007.2 1001.1 997.0 998.9 1005.0 1010.9 1017.3 1019.1 1009.9 MAX. QFF PRESSURE IN HPA 1029.0 1024.6 1021.6 1014.1 1014.8 1007.7 1002.7 1002.1 1011.3 1016.3 1022.8 1026.9 1029.0 DAY 5 12 12 8 13 5 6 31 28 29 28 28 MIN. QFF PRESSURE IN HPA 1005.3 1007.9 1002.7 1001.5 1000.7 994.8 992.5 994.9 999.6 1005.3 1012.3 1013.6 992.5 DAY 30 24 30 17 8 28 19 18 4 6 22 15 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 BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.1 13.5 18.6 24.4 29.9 32.7 34.8 34.5 30.4 25.4 17.0 13.9 23.8 MINIMUN AIR TEMPERATURE (C) 5.7 7.9 12.0 16.5 21.2 22.4 25.3 24.9 20.2 16.6 11.1 7.5 15.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 17 24 29 31 12 1 0 0 114 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS LOWEST(C) 0.6 0.0 5.2 11.0 15.0 18.0 19.4 21.2 15.0 13.6 3.0 3.0 0.0 DAY 19 17 23 14 7 5 5 23 30 27 30 5 MAXIMUM AIR TEMPERATURE (C) 15.3 17.6 23.1 29.6 35.6 41.8 44.6 44.2 41.0 35.1 24.6 21.5 31.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 12 30 30 31 31 30 29 0 0 194 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.8 25.2 31.6 37.6 42.2 46.0 50.0 46.6 44.4 40.0 29.6 25.6 50.0 DAY 29 28 31 19 17 10 22 5 1 2 10 27 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 9.7 11.1 13.1 14.4 19.4 19.3 19.3 20.8 18.5 13.5 14.0 15.3 MEAN DAILY TEMP. (MDT) (C) 10.5 12.8 17.5 23.1 28.4 32.1 35.0 34.5 30.6 25.8 17.9 14.5 23.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.2 66.3 229.0 333.2 432.5 419.5 288.9 150.2 8.8 0.0 1929.6 HEATING DEG. DAYS(BASE 18 0C) 233.8 146.6 43.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 46.1 109.6 579.4 DEWPOINT (MEAN C) 6.6 7.3 9.1 13.2 14.2 13.8 14.9 14.8 11.7 9.9 8.4 6.9 10.9 MIXING RATIO (G/KG) 6.21 6.59 7.59 9.74 10.46 10.31 11.16 11.00 9.06 7.74 7.29 6.30 8.62 VAPOUR PRESSURE (HPA) 10.06 10.65 12.20 15.58 16.64 16.29 17.54 17.35 14.38 12.44 11.74 10.21 13.76 SATURATION DEF. (HPA) 3.49 5.46 10.09 16.36 27.42 36.03 41.41 40.34 32.13 21.92 8.72 6.36 20.81 RELATIVE HUMIDITY (MEAN %) 77 69 58 54 42 36 34 34 36 42 60 66 51 RELATIVE HUMIDITY (MAX. %) 94 88 80 79 67 58 57 56 58 62 81 86 72 RELATIVE HUMIDITY (MIN. %) 59 51 39 37 24 18 16 16 15 21 37 40 31 RELATIVE HUMIDITY (MEAN% 03UTC) 93 86 77 78 66 53 54 52 56 59 75 81 69 RELATIVE HUMIDITY (MEAN% 09UTC) 70 61 48 42 31 22 22 22 22 25 45 52 39 RELATIVE HUMIDITY (MEAN% 15UTC) 72 65 56 54 36 25 23 23 27 35 54 61 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 51.6 80.2 13.0 105.5 2.1 0.0 0.0 0.0 0.0 1.2 10.4 3.1 267.1 DAYS WITH PRECIPITATION >=10 2 3 0 2 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 5 4 4 0 3 0 0 0 0 0 0 1 0 12 DAYS WITH PRECIPITATION >= 1 5 8 5 11 0 0 0 0 0 1 3 2 35 DAYS WITH PRECIPITATION 6 9 5 11 6 0 0 0 0 2 3 4 46 GREATEST DAILY PRECIPITATION 22.0 25.0 4.0 69.0 0.8 0.0 0.0 0.0 0.0 1.0 5.0 1.5 69.0 DAY 8 21 21 26 11 ** ** ** ** 10 1 15 DAY WITH THUNDER STORM 1 2 1 3 0 0 0 0 0 1 6 1 15 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 3 1 10 6 4 9 4 2 2 0 41 WIND DIRECTION (PREVAILING) 315 315 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.5 9.4 9.3 9.8 9.5 10.8 10.1 10.4 9.0 8.8 9.4 7.1 9.5 PREVAILING WIND PERCENT 16.8 19.3 15.5 17.3 29.0 50.4 44.9 54.8 43.3 16.1 35.0 30.2 32.6 CALMS PERCENT OF WIND 58.1 43.6 46.5 36.0 36.6 25.8 30.4 30.2 45.4 63.3 27.9 49.6 40.6 NO. OF WIND OBSERVATION 155 140 155 150 183 240 247 248 240 248 240 248 2494 VECTOR WIND DIRECTION (MEAN) 296 297 265 282 274 268 263 271 266 256 249 274 268 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.1 1.2 0.8 4.0 6.3 4.6 5.6 4.3 1.8 4.8 2.3 3.1 WIND STEADINESES (MEAN %) 45.5 22.0 22.6 14.0 66.7 84.0 69.7 82.4 89.6 58.1 70.6 65.7 57.4 WIND SPEED (MEAN KNOTS) 3.3 5.0 5.3 5.7 6.0 7.5 6.6 6.8 4.8 3.1 6.8 3.5 5.4 FASTEST WIND DIRECTION 110 300 120 120 200 260 260 270 280 260 230 280 120 FASTEST WIND SPEED (KNOTS) 16 23 19 25 25 23 23 23 19 19 23 16 25 DAY 7 15 3 25 2 2 1 12 5 25 25 4 DAYS WITH SKY CLEAR (0-2)/8 12 15 14 11 6 29 26 28 29 21 14 12 217 DAYS WITH P.CLOUDY (3-6)/8 11 4 9 12 16 1 4 3 1 7 13 16 97 DAYS WITH CLOUDY (7-8)/8 8 9 8 7 9 0 1 0 0 3 3 3 51 DAYS WITH VISIBILITY =< 2 KM 9 2 4 0 2 0 0 0 0 0 1 1 19 DURATION OF SUNSHINE HOURS 176.3 178.4 209.9 232.2 218.3 358.9 337.7 348.3 316.3 250.6 209.6 162.3 2998.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.9 1017.7 1014.0 1011.5 1007.2 1000.7 996.1 999.3 1003.2 1012.3 1016.1 1018.8 1009.7 MAX. QFE PRESSURE IN HPA 1026.9 1027.0 1020.3 1017.2 1014.7 1006.8 1000.7 1004.9 1009.9 1019.0 1023.1 1026.1 1027.0 DAY-HOUR 27- 6 7- 9 23- 6 4- 6 15- 6 5- 6 26- 6 18-21 30- 9 30- 6 30- 6 26- 6 MIN. QFE PRESSURE IN HPA 1007.8 1006.3 1004.0 1003.9 998.2 994.5 990.5 994.7 997.4 1005.8 1006.9 1013.7 990.5 DAY-HOUR 8- 3 2-15 5-12 26-12 31- 0 26- 3 10-15 3-15 1-15 3-12 10-15 8-12 MEAN QNH PRESSURE IN HPA 1020.5 1018.3 1014.6 1012.1 1007.8 1001.3 996.8 1000.0 1003.9 1012.9 1016.7 1019.5 1010.4 MAX. QNH PRESSURE IN HPA 1027.5 1027.6 1020.9 1017.8 1015.3 1007.4 1001.3 1005.5 1010.5 1019.6 1023.7 1026.7 1027.6 DAY-HOUR 27- 6 7- 9 23- 6 4- 6 15- 6 5- 6 26- 6 18-21 30- 9 30- 6 30- 6 26- 6 MIN. QNH PRESSURE IN HPA 1008.4 1006.9 1004.6 1004.5 998.8 995.1 991.1 995.3 998.0 1006.4 1007.5 1014.3 991.1 DAY-HOUR 8- 3 2-15 5-12 26-12 31- 0 26- 3 10-15 3-15 1-15 3-12 10-15 8-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.5 997.0 1000.1 1004.1 1013.2 1017.0 1019.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1007.7 1001.5 1005.8 1010.8 1019.9 1024.1 1027.0 ****** DAY-HOUR **-** **-** **-** **-** **-** 5- 6 26- 6 18-21 30- 9 30- 6 30- 6 26- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 995.4 991.4 995.6 998.3 1006.7 1007.8 1014.6 ****** DAY-HOUR **-** **-** **-** **-** **-** 26- 3 10-15 3-15 1-15 3-12 10-15 8-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 1000.3 995.7 998.7 1002.6 1011.8 1015.7 1018.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.1 999.3 1003.4 1006.2 1016.9 1022.2 1023.6 ****** DAY ** ** ** ** ** 5 26 19 30 31 30 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 995.6 991.8 995.2 998.4 1006.7 1007.4 1014.9 ****** DAY ** ** ** ** ** 15 10 4 2 3 11 8 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1000.9 996.3 999.3 1003.3 1012.4 1016.3 1019.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.7 999.9 1004.0 1006.8 1017.5 1022.8 1024.2 ****** DAY ** ** ** ** ** 5 26 19 30 31 30 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 996.2 992.4 995.8 999.0 1007.3 1008.0 1015.5 ****** DAY ** ** ** ** ** 15 10 4 2 3 11 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.2 996.5 999.5 1003.5 1012.7 1016.6 1019.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1006.0 1000.1 1004.2 1007.1 1017.8 1023.2 1024.5 ****** DAY ** ** ** ** ** 5 26 19 30 31 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 996.5 992.6 996.1 999.3 1007.6 1008.3 1015.8 ****** DAY ** ** ** ** ** 15 10 4 2 3 11 8 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1017.7 1013.9 1011.4 1007.5 1000.8 996.2 999.5 1003.3 1012.5 1015.9 1018.8 1009.8 MAX. QFE PRESSURE IN HPA 1025.7 1026.1 1018.8 1014.5 1014.0 1005.8 999.7 1003.7 1007.3 1017.9 1022.0 1024.3 1026.1 DAY 27 8 23 16 15 5 29 19 30 30 30 26 MIN. QFE PRESSURE IN HPA 1007.8 1008.9 1008.1 1006.0 999.4 994.5 992.3 996.6 999.4 1006.7 1008.1 1014.0 992.3 DAY 8 3 8 26 31 26 10 13 3 3 11 8 MEAN QNH PRESSURE IN HPA 1020.4 1018.3 1014.5 1012.0 1008.1 1001.4 996.8 1000.1 1003.9 1013.1 1016.6 1019.4 1010.4 MAX. QNH PRESSURE IN HPA 1026.3 1026.7 1019.4 1015.1 1014.6 1006.4 1000.3 1004.3 1007.9 1018.5 1022.6 1024.9 1026.7 DAY 27 8 23 16 15 5 29 19 30 30 30 26 MIN. QNH PRESSURE IN HPA 1008.4 1009.5 1008.7 1006.6 1000.0 995.1 992.9 997.2 1000.0 1007.3 1008.7 1014.6 992.9 DAY 8 3 8 26 31 26 10 13 3 3 11 8 MEAN QFF PRESSURE IN HPA 1020.7 1018.6 1014.8 1012.3 1008.3 1001.7 997.1 1000.4 1004.1 1013.4 1016.9 1019.7 1010.7 MAX. QFF PRESSURE IN HPA 1026.7 1027.1 1019.7 1015.4 1014.9 1006.7 1000.5 1004.6 1008.2 1018.8 1023.0 1025.2 1027.1 DAY 27 8 23 16 15 5 29 19 30 30 30 26 MIN. QFF PRESSURE IN HPA 1008.7 1009.8 1009.0 1006.9 1000.3 995.4 993.2 997.5 1000.3 1007.6 1009.0 1014.9 993.2 DAY 8 3 8 26 31 26 10 13 3 3 11 8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1021.1 1018.9 1015.2 1012.8 1008.6 1001.8 997.2 1000.7 1004.7 1014.0 1017.6 1020.2 1011.1 MAX. QFE PRESSURE IN HPA 1026.9 1026.8 1020.3 1017.2 1014.7 1006.8 1000.7 1004.5 1009.7 1019.0 1023.1 1026.1 1026.9 DAY 27 7 23 4 15 5 26 18 30 30 30 26 MIN. QFE PRESSURE IN HPA 1009.5 1010.6 1009.5 1006.6 1000.5 996.5 992.9 997.5 1001.0 1007.8 1010.9 1014.9 992.9 DAY 8 3 3 26 31 26 10 3 2 3 11 8 MEAN QNH PRESSURE IN HPA 1021.7 1019.5 1015.8 1013.5 1009.3 1002.4 997.8 1001.3 1005.4 1014.6 1018.2 1020.9 1011.7 MAX. QNH PRESSURE IN HPA 1027.5 1027.4 1020.9 1017.8 1015.3 1007.4 1001.3 1005.1 1010.3 1019.6 1023.7 1026.7 1027.5 DAY 27 7 23 4 15 5 26 18 30 30 30 26 MIN. QNH PRESSURE IN HPA 1010.1 1011.2 1010.1 1007.2 1001.1 997.1 993.5 998.1 1001.6 1008.4 1011.5 1015.5 993.5 DAY 8 3 3 26 31 26 10 3 2 3 11 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.6 998.0 1001.4 1005.6 1014.9 1018.5 1021.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1007.7 1001.5 1005.4 1010.6 1019.9 1024.1 1027.0 ****** DAY ** ** ** ** ** 5 26 18 30 30 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 997.4 993.8 998.4 1001.9 1008.7 1011.8 1015.8 ****** DAY ** ** ** ** ** 26 10 3 2 3 11 8 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1020.6 1018.6 1014.8 1012.2 1008.3 1001.5 997.1 1000.3 1004.3 1013.2 1016.8 1019.7 1010.6 MAX. QFE PRESSURE IN HPA 1026.4 1027.0 1020.0 1016.6 1014.2 1006.3 1000.3 1004.4 1009.9 1017.6 1022.7 1025.2 1027.0 DAY 27 7 23 4 14 5 25 18 30 30 30 26 MIN. QFE PRESSURE IN HPA 1009.5 1010.9 1006.9 1004.9 1000.6 996.2 992.6 996.9 1000.0 1007.0 1010.3 1014.8 992.6 DAY 8 3 5 26 30 26 10 3 1 3 10 8 MEAN QNH PRESSURE IN HPA 1021.2 1019.2 1015.4 1012.9 1008.9 1002.1 997.7 1001.0 1004.9 1013.9 1017.5 1020.3 1011.2 MAX. QNH PRESSURE IN HPA 1027.0 1027.6 1020.6 1017.2 1014.8 1006.9 1000.9 1005.0 1010.5 1018.2 1023.3 1025.8 1027.6 DAY 27 7 23 4 14 5 25 18 30 30 30 26 MIN. QNH PRESSURE IN HPA 1010.1 1011.5 1007.5 1005.5 1001.2 996.8 993.2 997.5 1000.6 1007.6 1010.9 1015.4 993.2 DAY 8 3 5 26 30 26 10 3 1 3 10 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1002.4 998.0 1001.2 1005.2 1014.1 1017.7 1020.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1007.2 1001.1 1005.3 1010.8 1018.5 1023.7 1026.1 ****** DAY ** ** ** ** ** 5 25 18 30 30 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 997.1 993.4 997.7 1000.9 1007.9 1011.2 1015.7 ****** DAY ** ** ** ** ** 26 10 3 1 3 10 8 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1016.6 1013.2 1010.7 1007.2 1000.3 995.9 998.8 1002.5 1011.6 1015.3 1018.0 1009.1 MAX. QFE PRESSURE IN HPA 1024.3 1026.4 1018.5 1014.9 1013.2 1004.9 1000.2 1003.9 1008.3 1016.1 1021.4 1023.8 1026.4 DAY 26 7 23 4 14 5 25 18 30 30 30 26 MIN. QFE PRESSURE IN HPA 1008.8 1007.7 1004.0 1003.9 998.9 995.4 991.7 995.7 997.7 1005.8 1007.4 1013.7 991.7 DAY 8 2 5 26 30 26 10 3 2 3 10 8 MEAN QNH PRESSURE IN HPA 1019.6 1017.2 1013.8 1011.3 1007.8 1001.0 996.5 999.4 1003.2 1012.2 1015.9 1018.7 1009.7 MAX. QNH PRESSURE IN HPA 1024.9 1027.0 1019.1 1015.5 1013.8 1005.5 1000.8 1004.5 1008.9 1016.7 1022.0 1024.4 1027.0 DAY 26 7 23 4 14 5 25 18 30 30 30 26 MIN. QNH PRESSURE IN HPA 1009.4 1008.3 1004.6 1004.5 999.5 996.0 992.3 996.3 998.3 1006.4 1008.0 1014.3 992.3 DAY 8 2 5 26 30 26 10 3 2 3 10 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.2 996.7 999.6 1003.5 1012.5 1016.2 1019.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.8 1001.0 1004.8 1009.2 1017.0 1022.4 1024.7 ****** DAY ** ** ** ** ** 5 25 18 30 30 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 996.3 992.5 996.6 998.6 1006.7 1008.3 1014.6 ****** DAY ** ** ** ** ** 26 10 3 2 3 10 8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.1 1016.7 1013.0 1010.3 1006.4 999.6 995.1 998.3 1002.1 1011.4 1015.3 1018.1 1008.8 MAX. QFE PRESSURE IN HPA 1024.3 1026.4 1018.1 1014.0 1012.3 1004.0 998.3 1003.9 1007.2 1016.4 1021.5 1023.5 1026.4 DAY 26 7 20 5 14 5 25 18 30 30 29 26 MIN. QFE PRESSURE IN HPA 1009.6 1006.3 1004.6 1004.6 998.5 994.6 990.5 994.7 997.4 1005.8 1006.9 1014.2 990.5 DAY 8 2 5 26 30 25 10 3 1 3 10 4 MEAN QNH PRESSURE IN HPA 1019.7 1017.3 1013.6 1011.0 1007.0 1000.2 995.7 998.9 1002.7 1012.0 1015.9 1018.7 1009.4 MAX. QNH PRESSURE IN HPA 1024.9 1027.0 1018.7 1014.6 1012.9 1004.6 998.9 1004.5 1007.8 1017.0 1022.1 1024.1 1027.0 DAY 26 7 20 5 14 5 25 18 30 30 29 26 MIN. QNH PRESSURE IN HPA 1010.2 1006.9 1005.2 1005.2 999.1 995.2 991.1 995.3 998.0 1006.4 1007.5 1014.8 991.1 DAY 8 2 5 26 30 25 10 3 1 3 10 4 MEAN QFF PRESSURE IN HPA 1020.1 1017.6 1013.9 1011.2 1007.3 1000.4 995.9 999.1 1002.9 1012.3 1016.2 1018.9 1009.7 MAX. QFF PRESSURE IN HPA 1025.3 1027.4 1019.0 1014.9 1013.2 1004.9 999.2 1004.8 1008.1 1017.3 1022.5 1024.4 1027.4 DAY 26 7 20 5 14 5 25 18 30 30 29 26 MIN. QFF PRESSURE IN HPA 1010.5 1007.2 1005.5 1005.5 999.4 995.5 991.4 995.6 998.3 1006.7 1007.8 1015.1 991.4 DAY 8 2 5 26 30 25 10 3 1 3 10 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 1000.4 995.9 999.2 1003.2 1012.1 1016.1 1018.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 1004.9 999.6 1004.3 1009.0 1017.4 1022.9 1023.8 ****** DAY ** ** ** ** ** 4 25 18 30 30 29 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 995.5 991.5 995.7 998.2 1006.8 1007.1 1015.3 ****** DAY ** ** ** ** ** 25 10 3 1 3 10 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.1 996.5 999.8 1003.8 1012.8 1016.7 1019.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.5 1000.2 1004.9 1009.6 1018.0 1023.5 1024.4 ****** DAY ** ** ** ** ** 4 25 18 30 30 29 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 996.1 992.1 996.3 998.8 1007.4 1007.7 1015.9 ****** DAY ** ** ** ** ** 25 10 3 1 3 10 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.3 996.7 1000.0 1004.1 1013.0 1017.0 1019.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.8 1000.4 1005.2 1009.9 1018.3 1023.9 1024.8 ****** DAY ** ** ** ** ** 4 25 18 30 30 29 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 996.4 992.4 996.5 999.1 1007.7 1008.0 1016.2 ****** DAY ** ** ** ** ** 25 10 3 1 3 10 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 1000.8 996.2 999.4 1003.3 1012.2 1016.2 1018.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 1005.7 1000.2 1004.9 1009.0 1017.1 1022.4 1024.1 ****** DAY ** ** ** ** ** 4 25 18 30 30 29 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** 995.6 991.9 995.9 998.8 1007.1 1007.1 1015.5 ****** DAY ** ** ** ** ** 25 10 3 1 2 10 2 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.5 996.8 1000.0 1003.9 1012.8 1016.8 1019.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 1006.3 1000.8 1005.5 1009.6 1017.7 1023.0 1024.7 ****** DAY ** ** ** ** ** 4 25 18 30 30 29 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** 996.2 992.5 996.5 999.4 1007.7 1007.7 1016.1 ****** DAY ** ** ** ** ** 25 10 3 1 2 10 2 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1001.8 997.0 1000.2 1004.1 1013.1 1017.1 1019.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 1006.6 1001.0 1005.8 1009.9 1018.0 1023.4 1025.0 ****** DAY ** ** ** ** ** 4 25 18 30 30 29 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** 996.5 992.7 996.7 999.7 1008.0 1008.0 1016.4 ****** DAY ** ** ** ** ** 25 10 3 1 2 10 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.9 14.1 18.6 25.6 29.9 33.1 34.2 34.1 31.6 26.1 19.3 10.6 24.3 MINIMUN AIR TEMPERATURE (C) 9.3 7.7 12.5 18.4 21.1 22.1 24.7 23.4 22.3 18.2 14.7 6.4 16.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 7 16 19 30 28 27 5 0 0 132 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS LOWEST(C) 5.2 4.0 8.6 13.4 15.4 17.6 20.0 20.6 20.0 15.0 6.6 -0.4 -0.4 DAY 11 5 8 5 7 21 1 12 25 30 10 9 MAXIMUM AIR TEMPERATURE (C) 19.6 20.2 24.4 32.5 37.7 42.3 43.2 44.9 41.4 34.8 24.7 15.8 31.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 23 31 30 31 31 30 28 3 0 208 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.0 25.6 31.0 39.6 46.8 46.0 46.4 48.0 44.6 38.8 32.8 24.0 48.0 DAY 2 28 31 29 31 10 25 8 2 9 3 19 DIF. BETWEEN (MAX.-MIN.) (C) 10.3 12.5 11.9 14.1 16.6 20.2 18.5 21.5 19.1 16.6 10.0 9.4 15.1 MEAN DAILY TEMP. (MDT) (C) 14.4 13.9 18.5 25.4 29.4 32.2 34.0 34.2 31.8 26.5 19.7 11.1 24.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 6.6 134.0 261.1 336.8 401.5 407.8 325.3 170.4 26.7 0.0 2070.2 HEATING DEG. DAYS(BASE 18 0C) 116.3 117.0 21.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21.4 213.5 489.2 DEWPOINT (MEAN C) 8.8 4.8 8.3 12.4 11.1 10.9 15.0 11.9 13.9 13.1 12.7 5.5 10.7 MIXING RATIO (G/KG) 7.15 5.45 6.99 9.30 8.65 8.58 11.08 9.21 10.20 9.58 9.39 5.83 8.45 VAPOUR PRESSURE (HPA) 11.54 8.82 11.25 14.85 13.78 13.56 17.39 14.53 16.21 15.35 15.07 9.47 13.48 SATURATION DEF. (HPA) 4.91 7.91 10.85 19.55 30.99 40.09 39.00 42.70 32.92 20.20 8.16 3.69 21.75 RELATIVE HUMIDITY (MEAN %) 74 57 55 48 35 29 34 30 37 48 68 73 49 RELATIVE HUMIDITY (MAX. %) 90 81 76 69 54 48 54 53 61 71 85 89 69 RELATIVE HUMIDITY (MIN. %) 51 33 32 26 17 14 19 13 17 27 47 51 29 RELATIVE HUMIDITY (MEAN% 03UTC) 85 74 71 62 48 44 51 49 56 69 81 86 65 RELATIVE HUMIDITY (MEAN% 09UTC) 62 43 42 36 22 18 24 18 23 32 56 62 37 RELATIVE HUMIDITY (MEAN% 15UTC) 68 47 45 38 29 22 27 19 30 42 63 68 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 48.3 2.4 46.6 11.0 0.2 0.0 0.0 0.0 0.0 6.5 53.4 17.6 186.0 DAYS WITH PRECIPITATION >=10 2 0 1 0 0 0 0 0 0 0 2 0 5 DAYS WITH PRECIPITATION >= 5 3 0 1 1 0 0 0 0 0 0 5 2 12 DAYS WITH PRECIPITATION >= 1 5 1 1 2 0 0 0 0 0 2 7 4 22 DAYS WITH PRECIPITATION 10 2 3 3 1 0 0 0 1 7 8 7 42 GREATEST DAILY PRECIPITATION 23.2 2.4 46.0 8.0 0.2 0.0 0.0 0.0 0.0 3.0 14.0 8.2 46.0 DAY 23 1 11 1 15 ** ** ** ** 19 23 30 DAY WITH THUNDER STORM 2 0 3 2 4 0 0 0 0 8 10 0 29 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 2 4 3 7 6 6 7 3 4 5 0 47 WIND DIRECTION (PREVAILING) 270 270 225 225 225 270 225 270 225 270 45 270 270 PREVAILING WIND SPEED(KNOTS) 7.3 8.3 8.8 8.0 10.4 10.3 10.4 10.1 8.4 7.6 9.2 6.7 8.6 PREVAILING WIND PERCENT 16.9 31.3 16.1 17.9 27.4 40.8 44.0 43.1 19.6 20.2 17.1 36.7 25.7 CALMS PERCENT OF WIND 43.5 33.9 34.7 35.8 23.0 17.5 16.9 17.3 39.2 31.0 29.2 37.5 29.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 28 262 215 240 245 251 240 255 242 291 54 274 253 VECTOR WIND MAGNITUDE(KNOTS) 1.4 2.3 1.3 1.2 3.9 7.0 7.1 6.5 2.2 1.4 1.5 2.4 2.7 WIND STEADINESES (MEAN %) 27.5 42.6 25.5 26.1 52.7 86.4 84.5 83.3 50.0 28.0 23.4 58.5 45.0 WIND SPEED (MEAN KNOTS) 5.1 5.4 5.1 4.6 7.4 8.1 8.4 7.8 4.4 5.0 6.4 4.1 6.0 FASTEST WIND DIRECTION 60 280 120 320 330 270 270 240 270 280 110 280 120 FASTEST WIND SPEED (KNOTS) 21 23 29 23 29 27 23 25 23 27 27 19 29 DAY 4 6 7 26 15 12 12 1 27 30 6 21 DAYS WITH SKY CLEAR (0-2)/8 11 19 14 14 21 27 30 30 22 16 10 17 231 DAYS WITH P.CLOUDY (3-6)/8 13 9 11 11 8 3 1 1 8 12 13 8 98 DAYS WITH CLOUDY (7-8)/8 7 0 6 5 2 0 0 0 0 3 7 6 36 DAYS WITH VISIBILITY =< 2 KM 6 1 4 1 3 3 2 1 1 1 2 3 28 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** 359.1 ****** ****** ****** 244.2 ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.7 1015.8 1013.4 1009.4 1006.1 998.1 994.6 996.7 1005.2 1012.1 1015.2 1021.6 1008.7 MAX. QFE PRESSURE IN HPA 1026.0 1022.9 1020.8 1017.7 1014.2 1003.2 997.4 1001.7 1014.5 1018.3 1023.4 1029.0 1029.0 DAY-HOUR 28- 6 4- 6 18- 6 16- 6 8- 6 5- 6 6- 6 15- 6 24- 6 23- 6 10- 6 7- 0 MIN. QFE PRESSURE IN HPA 1005.2 1005.5 1001.3 1001.4 997.7 994.4 991.1 992.4 995.8 1006.6 1006.9 1006.3 991.1 DAY-HOUR 23-15 1- 0 11-15 26-15 31-15 27-21 2- 0 10-12 1-12 5-15 16-21 3-12 MEAN QNH PRESSURE IN HPA 1017.3 1016.4 1014.1 1010.0 1006.8 998.7 995.3 997.3 1005.8 1012.7 1015.8 1022.2 1009.4 MAX. QNH PRESSURE IN HPA 1026.6 1023.5 1021.4 1018.3 1014.8 1003.8 998.0 1002.3 1015.1 1018.9 1024.0 1029.6 1029.6 DAY-HOUR 28- 6 4- 6 18- 6 16- 6 8- 6 5- 6 6- 6 15- 6 24- 6 23- 6 10- 6 7- 0 MIN. QNH PRESSURE IN HPA 1005.8 1006.1 1001.9 1002.0 998.3 995.0 991.7 993.0 996.4 1007.2 1007.5 1006.9 991.7 DAY-HOUR 23-15 1- 0 11-15 26-15 31-15 27-21 2- 0 10-12 1-12 5-15 16-21 3-12 MEAN QFF PRESSURE IN HPA 1017.6 1016.7 1014.3 1010.3 1007.0 999.0 995.5 997.5 1006.1 1012.9 1016.1 1022.5 1009.6 MAX. QFF PRESSURE IN HPA 1027.0 1023.9 1021.7 1018.6 1015.1 1004.1 998.3 1002.6 1015.4 1019.2 1024.3 1030.0 1030.0 DAY-HOUR 28- 6 4- 6 18- 6 16- 6 8- 6 5- 6 6- 6 15- 6 24- 6 23- 6 10- 6 7- 0 MIN. QFF PRESSURE IN HPA 1006.1 1006.4 1002.2 1002.3 998.5 995.3 991.9 993.2 996.7 1007.5 1007.8 1007.2 991.9 DAY-HOUR 23-15 1- 0 11-15 26-15 31-15 27-21 2- 0 10-12 1-12 5-15 16-21 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.6 1015.5 1013.1 1009.1 1005.8 997.7 994.3 996.2 1004.5 1011.4 1015.2 1021.2 1008.4 MAX. QFE PRESSURE IN HPA 1024.0 1021.9 1018.9 1014.9 1012.5 1001.5 996.5 998.9 1012.2 1015.8 1021.1 1029.0 1029.0 DAY 28 4 18 17 8 5 1 8 24 20 10 7 MIN. QFE PRESSURE IN HPA 1008.3 1005.5 1003.6 1004.5 1000.1 994.7 991.1 993.2 997.0 1007.4 1008.8 1011.7 991.1 DAY 16 1 12 23 31 28 2 1 1 6 17 4 MEAN QNH PRESSURE IN HPA 1017.2 1016.1 1013.7 1009.7 1006.4 998.3 994.9 996.8 1005.1 1012.0 1015.8 1021.9 1009.0 MAX. QNH PRESSURE IN HPA 1024.6 1022.5 1019.5 1015.5 1013.1 1002.1 997.1 999.5 1012.8 1016.4 1021.7 1029.6 1029.6 DAY 28 4 18 17 8 5 1 8 24 20 10 7 MIN. QNH PRESSURE IN HPA 1008.9 1006.1 1004.2 1005.1 1000.7 995.3 991.7 993.8 997.6 1008.0 1009.4 1012.3 991.7 DAY 16 1 12 23 31 28 2 1 1 6 17 4 MEAN QFF PRESSURE IN HPA 1017.5 1016.4 1014.0 1010.0 1006.7 998.5 995.1 997.0 1005.4 1012.3 1016.1 1022.2 1009.3 MAX. QFF PRESSURE IN HPA 1024.9 1022.8 1019.8 1015.8 1013.4 1002.4 997.4 999.8 1013.1 1016.7 1022.0 1030.0 1030.0 DAY 28 4 18 17 8 5 1 8 24 20 10 7 MIN. QFF PRESSURE IN HPA 1009.2 1006.4 1004.5 1005.4 1000.9 995.5 991.9 994.1 997.9 1008.3 1009.7 1012.6 991.9 DAY 16 1 12 23 31 28 2 1 1 6 17 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1015.6 1013.3 1009.8 1006.4 998.3 994.9 996.9 1005.3 1012.2 1015.4 1021.4 1008.9 MAX. QFE PRESSURE IN HPA 1024.3 1021.6 1019.7 1016.7 1012.8 1001.9 996.9 1000.1 1013.9 1017.6 1021.6 1028.0 1028.0 DAY 28 4 18 17 8 6 6 15 24 31 10 7 MIN. QFE PRESSURE IN HPA 1008.5 1007.1 1003.5 1005.1 1000.8 995.3 992.8 993.4 997.0 1007.9 1010.3 1011.0 992.8 DAY 23 12 7 26 31 25 12 10 1 6 25 3 MEAN QNH PRESSURE IN HPA 1017.4 1016.2 1014.0 1010.4 1007.1 998.9 995.5 997.5 1005.9 1012.9 1016.0 1022.0 1009.5 MAX. QNH PRESSURE IN HPA 1024.9 1022.2 1020.3 1017.3 1013.4 1002.5 997.5 1000.7 1014.5 1018.2 1022.2 1028.6 1028.6 DAY 28 4 18 17 8 6 6 15 24 31 10 7 MIN. QNH PRESSURE IN HPA 1009.1 1007.7 1004.1 1005.7 1001.4 995.9 993.4 994.0 997.6 1008.5 1010.9 1011.6 993.4 DAY 23 12 7 26 31 25 12 10 1 6 25 3 MEAN QFF PRESSURE IN HPA 1017.7 1016.5 1014.2 1010.7 1007.3 999.2 995.8 997.7 1006.2 1013.1 1016.3 1022.3 1009.7 MAX. QFF PRESSURE IN HPA 1025.2 1022.6 1020.6 1017.6 1013.7 1002.8 997.8 1000.9 1014.8 1018.5 1022.5 1029.0 1029.0 DAY 28 4 18 17 8 6 6 15 24 31 10 7 MIN. QFF PRESSURE IN HPA 1009.4 1008.0 1004.4 1006.0 1001.7 996.2 993.6 994.3 997.9 1008.8 1011.2 1011.9 993.6 DAY 23 12 7 26 31 25 12 10 1 6 25 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.2 1017.0 1015.0 1010.9 1007.7 999.3 995.7 997.9 1006.7 1013.7 1016.5 1022.7 1010.1 MAX. QFE PRESSURE IN HPA 1026.0 1022.9 1020.8 1017.7 1014.2 1003.2 997.4 1001.7 1014.5 1018.3 1023.4 1028.9 1028.9 DAY 28 4 18 16 8 5 6 15 24 23 10 7 MIN. QFE PRESSURE IN HPA 1008.2 1009.8 1006.2 1005.3 1001.3 997.1 993.6 993.9 998.1 1009.4 1010.3 1009.9 993.6 DAY 23 28 12 30 31 23 22 10 1 6 25 3 MEAN QNH PRESSURE IN HPA 1018.8 1017.6 1015.7 1011.5 1008.3 999.9 996.3 998.5 1007.3 1014.3 1017.2 1023.3 1010.7 MAX. QNH PRESSURE IN HPA 1026.6 1023.5 1021.4 1018.3 1014.8 1003.8 998.0 1002.3 1015.1 1018.9 1024.0 1029.5 1029.5 DAY 28 4 18 16 8 5 6 15 24 23 10 7 MIN. QNH PRESSURE IN HPA 1008.8 1010.4 1006.8 1005.9 1001.9 997.7 994.2 994.5 998.7 1010.0 1010.9 1010.5 994.2 DAY 23 28 12 30 31 23 22 10 1 6 25 3 MEAN QFF PRESSURE IN HPA 1019.1 1017.9 1016.0 1011.8 1008.6 1000.1 996.5 998.7 1007.5 1014.5 1017.4 1023.7 1011.0 MAX. QFF PRESSURE IN HPA 1027.0 1023.9 1021.7 1018.6 1015.1 1004.1 998.3 1002.6 1015.4 1019.2 1024.3 1029.9 1029.9 DAY 28 4 18 16 8 5 6 15 24 23 10 7 MIN. QFF PRESSURE IN HPA 1009.1 1010.7 1007.1 1006.2 1002.1 998.0 994.5 994.7 999.0 1010.3 1011.2 1010.8 994.5 DAY 23 28 12 30 31 23 22 10 1 6 25 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1016.7 1014.6 1010.4 1007.2 999.1 995.4 997.3 1006.1 1012.8 1015.7 1022.2 1009.6 MAX. QFE PRESSURE IN HPA 1026.0 1021.9 1020.8 1016.7 1013.4 1003.2 997.2 1000.9 1013.7 1018.1 1022.4 1028.0 1028.0 DAY 28 3 18 16 8 5 6 15 24 31 10 7 MIN. QFE PRESSURE IN HPA 1007.5 1009.0 1006.2 1003.4 1000.2 996.3 993.7 993.3 998.0 1008.2 1008.4 1006.7 993.3 DAY 23 28 12 30 31 23 2 10 1 6 25 3 MEAN QNH PRESSURE IN HPA 1018.2 1017.4 1015.3 1011.1 1007.8 999.7 996.1 998.0 1006.7 1013.5 1016.3 1022.9 1010.2 MAX. QNH PRESSURE IN HPA 1026.6 1022.5 1021.4 1017.3 1014.0 1003.8 997.8 1001.5 1014.3 1018.7 1023.0 1028.6 1028.6 DAY 28 3 18 16 8 5 6 15 24 31 10 7 MIN. QNH PRESSURE IN HPA 1008.1 1009.6 1006.8 1004.0 1000.8 996.9 994.3 993.9 998.6 1008.8 1009.0 1007.3 993.9 DAY 23 28 12 30 31 23 2 10 1 6 25 3 MEAN QFF PRESSURE IN HPA 1018.5 1017.7 1015.6 1011.3 1008.0 999.9 996.3 998.2 1007.0 1013.7 1016.6 1023.2 1010.5 MAX. QFF PRESSURE IN HPA 1026.9 1022.8 1021.7 1017.6 1014.3 1004.1 998.1 1001.8 1014.6 1019.0 1023.3 1029.0 1029.0 DAY 28 3 18 16 8 5 6 15 24 31 10 7 MIN. QFF PRESSURE IN HPA 1008.4 1009.9 1007.1 1004.3 1001.0 997.2 994.5 994.1 998.9 1009.1 1009.3 1007.6 994.1 DAY 23 28 12 30 31 23 2 10 1 6 25 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.9 1014.8 1012.7 1008.9 1005.5 997.7 994.1 996.0 1004.4 1011.2 1014.2 1020.9 1008.0 MAX. QFE PRESSURE IN HPA 1023.3 1020.4 1018.3 1015.0 1011.4 1001.2 995.9 998.9 1012.4 1017.0 1020.9 1026.9 1026.9 DAY 28 3 18 16 7 5 6 15 24 31 10 6 MIN. QFE PRESSURE IN HPA 1006.8 1006.5 1002.8 1002.7 998.5 995.3 992.2 992.4 995.8 1007.0 1007.3 1006.3 992.2 DAY 23 28 11 26 31 23 2 10 1 5 25 3 MEAN QNH PRESSURE IN HPA 1016.5 1015.5 1013.3 1009.5 1006.2 998.3 994.8 996.6 1005.1 1011.9 1014.9 1021.5 1008.7 MAX. QNH PRESSURE IN HPA 1023.9 1021.0 1018.9 1015.6 1012.0 1001.8 996.5 999.5 1013.0 1017.6 1021.5 1027.5 1027.5 DAY 28 3 18 16 7 5 6 15 24 31 10 6 MIN. QNH PRESSURE IN HPA 1007.4 1007.1 1003.4 1003.3 999.1 995.9 992.8 993.0 996.4 1007.6 1007.9 1006.9 992.8 DAY 23 28 11 26 31 23 2 10 1 5 25 3 MEAN QFF PRESSURE IN HPA 1016.8 1015.8 1013.6 1009.7 1006.4 998.5 995.0 996.8 1005.3 1012.1 1015.2 1021.8 1008.9 MAX. QFF PRESSURE IN HPA 1024.2 1021.3 1019.2 1015.9 1012.3 1002.1 996.8 999.8 1013.3 1017.9 1021.8 1027.9 1027.9 DAY 28 3 18 16 7 5 6 15 24 31 10 6 MIN. QFF PRESSURE IN HPA 1007.7 1007.4 1003.7 1003.6 999.3 996.2 993.0 993.2 996.7 1007.9 1008.2 1007.2 993.0 DAY 23 28 11 26 31 23 2 10 1 5 25 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1015.8 1014.9 1012.2 1008.0 1004.8 997.0 993.5 995.5 1004.1 1011.1 1014.3 1020.9 1007.7 MAX. QFE PRESSURE IN HPA 1023.5 1020.4 1017.6 1013.5 1010.8 1000.2 995.7 998.2 1011.8 1017.1 1020.9 1027.3 1027.3 DAY 27 3 18 16 7 4 5 28 24 31 10 6 MIN. QFE PRESSURE IN HPA 1005.2 1006.1 1001.3 1001.4 997.7 994.7 991.8 992.8 995.8 1006.6 1008.0 1008.3 991.8 DAY 23 11 11 26 31 27 11 10 1 5 6 3 MEAN QNH PRESSURE IN HPA 1016.5 1015.5 1012.9 1008.7 1005.4 997.7 994.1 996.1 1004.7 1011.8 1015.0 1021.5 1008.3 MAX. QNH PRESSURE IN HPA 1024.1 1021.0 1018.2 1014.1 1011.4 1000.8 996.3 998.8 1012.4 1017.7 1021.5 1027.9 1027.9 DAY 27 3 18 16 7 4 5 28 24 31 10 6 MIN. QNH PRESSURE IN HPA 1005.8 1006.7 1001.9 1002.0 998.3 995.3 992.4 993.4 996.4 1007.2 1008.6 1008.9 992.4 DAY 23 11 11 26 31 27 11 10 1 5 6 3 MEAN QFF PRESSURE IN HPA 1016.8 1015.8 1013.2 1008.9 1005.6 997.9 994.3 996.4 1005.0 1012.0 1015.3 1021.9 1008.6 MAX. QFF PRESSURE IN HPA 1024.4 1021.3 1018.5 1014.4 1011.7 1001.1 996.6 999.1 1012.7 1018.0 1021.8 1028.3 1028.3 DAY 27 3 18 16 7 5 5 28 24 31 10 6 MIN. QFF PRESSURE IN HPA 1006.1 1007.0 1002.2 1002.3 998.5 995.6 992.6 993.6 996.7 1007.5 1008.9 1009.2 992.6 DAY 23 11 11 26 31 27 11 10 1 5 6 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1016.4 1015.9 1013.2 1008.9 1005.8 997.9 994.6 996.8 1005.3 1012.1 1015.0 1021.7 1008.6 MAX. QFE PRESSURE IN HPA 1024.6 1021.6 1017.8 1014.9 1012.0 1001.2 996.7 999.2 1012.6 1017.7 1021.6 1028.9 1028.9 DAY 27 3 16 16 7 17 5 28 24 31 10 6 MIN. QFE PRESSURE IN HPA 1006.5 1006.0 1003.8 1004.2 999.0 994.9 992.5 993.7 997.5 1007.4 1007.3 1010.8 992.5 DAY 31 11 11 26 31 27 1 9 1 5 16 3 MEAN QNH PRESSURE IN HPA 1017.1 1016.5 1013.8 1009.6 1006.4 998.5 995.2 997.4 1005.9 1012.7 1015.7 1022.3 1009.3 MAX. QNH PRESSURE IN HPA 1025.2 1022.2 1018.4 1015.5 1012.6 1001.8 997.3 999.8 1013.2 1018.3 1022.2 1029.5 1029.5 DAY 27 3 16 16 7 17 5 28 24 31 10 6 MIN. QNH PRESSURE IN HPA 1007.1 1006.6 1004.4 1004.8 999.6 995.5 993.1 994.3 998.1 1008.0 1007.9 1011.4 993.1 DAY 31 11 11 26 31 27 1 9 1 5 16 3 MEAN QFF PRESSURE IN HPA 1017.4 1016.8 1014.1 1009.8 1006.7 998.8 995.4 997.7 1006.1 1013.0 1016.0 1022.7 1009.5 MAX. QFF PRESSURE IN HPA 1025.5 1022.6 1018.7 1015.8 1012.9 1002.1 997.6 1000.1 1013.5 1018.6 1022.5 1029.9 1029.9 DAY 27 3 16 16 7 17 5 28 24 31 10 6 MIN. QFF PRESSURE IN HPA 1007.4 1006.9 1004.7 1005.1 999.8 995.8 993.4 994.5 998.4 1008.3 1008.2 1011.7 993.4 DAY 31 11 11 26 31 27 1 9 1 5 16 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1016.1 1013.4 1009.2 1006.0 998.1 994.8 996.9 1005.3 1012.0 1015.1 1021.8 1008.8 MAX. QFE PRESSURE IN HPA 1025.4 1021.9 1019.3 1014.9 1012.8 1001.8 997.2 999.3 1012.6 1017.8 1021.1 1028.6 1028.6 DAY 27 3 1 16 7 17 5 7 24 31 9 6 MIN. QFE PRESSURE IN HPA 1007.5 1006.0 1003.8 1004.9 999.0 994.4 992.9 994.0 997.3 1007.4 1006.9 1011.7 992.9 DAY 31 11 11 26 31 27 11 9 1 5 16 3 MEAN QNH PRESSURE IN HPA 1017.3 1016.7 1014.0 1009.8 1006.6 998.7 995.4 997.5 1005.9 1012.6 1015.7 1022.4 1009.4 MAX. QNH PRESSURE IN HPA 1026.0 1022.5 1019.9 1015.5 1013.4 1002.4 997.8 999.9 1013.2 1018.4 1021.7 1029.2 1029.2 DAY 27 3 1 16 7 17 5 7 24 31 9 6 MIN. QNH PRESSURE IN HPA 1008.1 1006.6 1004.4 1005.5 999.6 995.0 993.5 994.6 997.9 1008.0 1007.5 1012.3 993.5 DAY 31 11 11 26 31 27 11 9 1 5 16 3 MEAN QFF PRESSURE IN HPA 1017.6 1017.0 1014.3 1010.1 1006.8 998.9 995.7 997.8 1006.1 1012.9 1016.0 1022.7 1009.7 MAX. QFF PRESSURE IN HPA 1026.3 1022.8 1020.2 1015.8 1013.7 1002.6 998.1 1000.1 1013.5 1018.7 1022.0 1029.6 1029.6 DAY 27 3 1 16 7 17 5 7 24 31 9 6 MIN. QFF PRESSURE IN HPA 1008.4 1006.9 1004.7 1005.8 999.9 995.3 993.7 994.8 998.2 1008.3 1007.8 1012.6 993.7 DAY 31 11 11 26 31 27 11 9 1 5 16 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.0 14.7 18.3 23.1 30.8 34.1 34.6 33.9 29.5 24.2 17.0 11.0 23.6 MINIMUN AIR TEMPERATURE (C) 7.8 9.8 12.4 15.7 22.3 24.2 25.2 23.4 19.7 15.1 9.3 5.0 15.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 21 29 31 30 13 1 1 0 127 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 1 0 1 TEMPERATURE RECORDS LOWEST(C) 2.6 5.0 8.4 9.4 15.4 20.4 23.0 20.6 14.2 9.8 0.0 1.0 0.0 DAY 24 11 27 6 10 14 12 19 24 21 28 21 MAXIMUM AIR TEMPERATURE (C) 17.0 20.1 24.4 29.9 38.7 43.2 44.0 44.5 39.6 34.3 25.8 18.3 31.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 15 31 30 31 31 30 30 7 0 205 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.8 24.4 29.8 35.6 44.4 47.6 49.0 48.0 43.4 39.2 31.6 23.0 49.0 DAY 11 1 31 30 23 21 4 4 5 1 1 10 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 10.3 12.0 14.2 16.4 19.0 18.8 21.1 19.9 19.2 16.5 13.3 15.9 MEAN DAILY TEMP. (MDT) (C) 12.4 15.0 18.4 22.8 30.5 33.7 34.6 34.0 29.7 24.7 17.6 11.6 23.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 2.5 63.7 295.4 380.0 422.3 401.8 260.2 115.3 22.1 0.0 1963.3 HEATING DEG. DAYS(BASE 18 0C) 173.9 85.1 17.2 0.8 0.0 0.0 0.0 0.0 0.0 0.0 68.2 197.0 542.2 DEWPOINT (MEAN C) 8.6 8.9 9.9 12.9 14.7 13.7 15.5 13.5 13.0 8.0 5.1 4.8 10.7 MIXING RATIO (G/KG) 7.08 7.18 7.74 9.60 10.84 10.04 11.44 10.07 9.61 6.97 6.20 5.40 8.51 VAPOUR PRESSURE (HPA) 11.47 11.59 12.45 15.34 17.22 15.87 17.95 15.86 15.26 11.19 9.98 8.77 13.58 SATURATION DEF. (HPA) 2.92 5.53 9.20 13.99 29.46 40.42 39.93 40.41 28.72 21.17 11.12 4.86 20.64 RELATIVE HUMIDITY (MEAN %) 82 71 62 56 41 32 35 32 40 40 50 69 51 RELATIVE HUMIDITY (MAX. %) 94 91 84 79 65 52 53 52 65 64 73 89 72 RELATIVE HUMIDITY (MIN. %) 63 46 38 35 22 16 20 16 20 19 26 43 30 RELATIVE HUMIDITY (MEAN% 03UTC) 92 88 80 74 57 49 51 49 63 62 68 84 68 RELATIVE HUMIDITY (MEAN% 09UTC) 74 58 48 41 28 20 25 22 26 23 37 52 38 RELATIVE HUMIDITY (MEAN% 15UTC) 74 60 49 45 31 22 25 23 30 35 40 61 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.0 28.3 10.5 19.2 4.0 0.0 0.0 0.0 0.0 0.0 4.2 12.4 110.6 DAYS WITH PRECIPITATION >=10 2 1 1 0 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 2 2 1 2 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 1 4 6 1 3 2 0 0 0 0 0 1 4 21 DAYS WITH PRECIPITATION 5 7 3 6 2 0 0 0 0 0 2 6 31 GREATEST DAILY PRECIPITATION 14.0 10.0 10.0 9.0 3.0 0.0 0.0 0.0 0.0 0.0 4.0 4.0 14.0 DAY 13 16 13 22 5 ** ** ** ** ** 2 11 DAY WITH THUNDER STORM 0 4 3 5 5 1 0 0 0 0 1 0 19 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 2 7 5 5 4 1 1 1 2 2 31 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.5 6.3 8.5 9.5 9.2 12.5 12.6 10.5 8.3 8.0 9.2 7.3 9.6 PREVAILING WIND PERCENT 29.4 32.1 22.6 20.8 21.8 45.0 72.2 58.1 45.8 24.6 36.7 33.1 36.9 CALMS PERCENT OF WIND 44.0 35.3 28.6 12.1 4.8 5.0 1.6 6.9 21.3 19.0 15.4 17.7 17.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 261 259 251 308 275 265 271 269 264 271 285 283 270 VECTOR WIND MAGNITUDE(KNOTS) 1.9 1.4 1.2 1.1 1.6 7.3 9.9 7.6 4.9 1.5 2.6 3.4 3.6 WIND STEADINESES (MEAN %) 46.3 35.0 23.5 13.9 19.5 73.7 88.4 86.4 75.4 26.8 37.7 66.7 51.4 WIND SPEED (MEAN KNOTS) 4.1 4.0 5.1 7.9 8.2 9.9 11.2 8.8 6.5 5.6 6.9 5.1 7.0 FASTEST WIND DIRECTION 140 130 40 120 60 270 270 270 280 300 180 30 270 FASTEST WIND SPEED (KNOTS) 17 19 19 27 23 29 29 23 19 29 29 19 29 DAY 12 15 11 3 2 13 12 5 3 4 2 15 DAYS WITH SKY CLEAR (0-2)/8 17 14 16 10 17 28 27 31 29 26 19 14 248 DAYS WITH P.CLOUDY (3-6)/8 6 11 10 14 11 2 4 0 1 5 10 13 87 DAYS WITH CLOUDY (7-8)/8 8 3 5 6 3 0 0 0 0 0 1 4 30 DAYS WITH VISIBILITY =< 2 KM 7 1 0 0 2 0 0 0 0 0 1 4 15 DURATION OF SUNSHINE HOURS ****** ****** 223.3 ****** ****** ****** 361.6 362.8 328.5 302.3 233.5 199.9 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.9 1015.8 1014.0 1010.2 1006.2 1000.0 994.4 997.0 1004.3 1010.8 1015.9 1019.8 1009.0 MAX. QFE PRESSURE IN HPA 1024.5 1022.8 1021.0 1016.9 1013.8 1007.0 998.7 1002.4 1009.5 1018.8 1023.3 1025.7 1025.7 DAY-HOUR 19- 6 10- 6 3- 6 6- 6 7-21 1- 9 7- 6 12- 6 29- 6 25- 6 26- 6 19- 6 MIN. QFE PRESSURE IN HPA 1012.6 1008.1 1008.5 1004.5 1000.5 994.9 988.2 990.2 997.8 1004.4 1008.5 1011.2 988.2 DAY-HOUR 11-15 23-12 17- 3 19- 0 23-21 24-15 20-15 3-15 1-15 11-21 6-12 11-21 MEAN QNH PRESSURE IN HPA 1020.6 1016.4 1014.6 1010.9 1006.8 1000.6 995.0 997.6 1004.9 1011.4 1016.5 1020.5 1009.6 MAX. QNH PRESSURE IN HPA 1025.1 1023.4 1021.6 1017.5 1014.4 1007.6 999.3 1003.0 1010.1 1019.4 1023.9 1026.3 1026.3 DAY-HOUR 19- 6 10- 6 3- 6 6- 6 7-21 1- 9 7- 6 12- 6 29- 6 25- 6 26- 6 19- 6 MIN. QNH PRESSURE IN HPA 1013.2 1008.7 1009.1 1005.1 1001.1 995.5 988.8 990.8 998.4 1005.0 1009.1 1011.8 988.8 DAY-HOUR 11-15 23-12 17- 3 19- 0 23-21 24-15 20-15 3-15 1-15 11-21 6-12 11-21 MEAN QFF PRESSURE IN HPA 1020.9 1016.7 1014.9 1011.1 1007.0 1000.9 995.2 997.8 1005.2 1011.6 1016.8 1020.8 1009.9 MAX. QFF PRESSURE IN HPA 1025.5 1023.7 1021.9 1017.8 1014.7 1007.9 999.6 1003.3 1010.4 1019.7 1024.3 1026.7 1026.7 DAY-HOUR 19- 6 10- 6 3- 6 6- 6 7-21 1- 9 7- 6 12- 6 29- 6 25- 6 26- 6 19- 6 MIN. QFF PRESSURE IN HPA 1013.5 1009.0 1009.4 1005.4 1001.3 995.8 989.0 991.0 998.7 1005.3 1009.4 1012.1 989.0 DAY-HOUR 11-15 23-12 17- 3 19- 0 23-21 24-15 21-15 3-15 1-15 11-21 6-12 11-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1015.5 1013.4 1009.6 1005.7 999.6 994.0 996.4 1003.8 1010.3 1015.5 1019.7 1008.6 MAX. QFE PRESSURE IN HPA 1023.6 1020.4 1018.7 1015.3 1011.1 1004.8 996.7 1000.7 1008.2 1016.6 1021.3 1024.6 1024.6 DAY 20 11 3 6 9 3 4 25 22 25 27 20 MIN. QFE PRESSURE IN HPA 1013.4 1008.2 1009.2 1004.5 1001.5 995.3 990.0 991.6 998.2 1004.9 1009.9 1013.0 990.0 DAY 12 5 17 19 23 19 21 4 2 12 7 12 MEAN QNH PRESSURE IN HPA 1020.3 1016.2 1014.1 1010.2 1006.3 1000.2 994.6 997.0 1004.4 1011.0 1016.1 1020.3 1009.2 MAX. QNH PRESSURE IN HPA 1024.2 1021.0 1019.3 1015.9 1011.7 1005.4 997.3 1001.3 1008.8 1017.2 1021.9 1025.2 1025.2 DAY 20 11 3 6 9 3 4 25 22 25 27 20 MIN. QNH PRESSURE IN HPA 1014.0 1008.8 1009.8 1005.1 1002.1 995.9 990.6 992.2 998.8 1005.5 1010.5 1013.6 990.6 DAY 12 5 17 19 23 19 21 4 2 12 7 12 MEAN QFF PRESSURE IN HPA 1020.6 1016.5 1014.4 1010.5 1006.6 1000.4 994.9 997.2 1004.7 1011.2 1016.4 1020.6 1009.5 MAX. QFF PRESSURE IN HPA 1024.5 1021.3 1019.6 1016.2 1012.0 1005.7 997.5 1001.6 1009.1 1017.5 1022.3 1025.5 1025.5 DAY 20 11 3 6 9 3 4 25 22 25 27 20 MIN. QFF PRESSURE IN HPA 1014.3 1009.1 1010.1 1005.4 1002.4 996.1 990.8 992.4 999.1 1005.8 1010.8 1013.9 990.8 DAY 12 5 17 19 24 19 22 4 2 12 7 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.9 1015.8 1013.9 1010.3 1006.7 1000.4 994.7 997.2 1004.4 1010.9 1015.9 1019.8 1009.1 MAX. QFE PRESSURE IN HPA 1023.2 1020.9 1019.8 1015.7 1012.0 1005.2 997.2 1001.3 1008.6 1017.5 1021.5 1024.6 1024.6 DAY 20 10 3 6 8 1 5 12 22 25 26 19 MIN. QFE PRESSURE IN HPA 1012.8 1008.6 1008.5 1005.1 1002.3 996.3 990.0 993.0 999.0 1004.9 1009.9 1013.7 990.0 DAY 12 5 17 19 23 20 21 4 1 12 7 12 MEAN QNH PRESSURE IN HPA 1020.5 1016.4 1014.6 1010.9 1007.3 1001.0 995.3 997.8 1005.0 1011.5 1016.6 1020.4 1009.8 MAX. QNH PRESSURE IN HPA 1023.8 1021.5 1020.4 1016.3 1012.6 1005.8 997.8 1001.9 1009.2 1018.1 1022.1 1025.2 1025.2 DAY 20 10 3 6 8 1 5 12 22 25 26 19 MIN. QNH PRESSURE IN HPA 1013.4 1009.2 1009.1 1005.7 1002.9 996.9 990.6 993.6 999.6 1005.5 1010.5 1014.3 990.6 DAY 12 5 17 19 23 20 21 4 1 12 7 12 MEAN QFF PRESSURE IN HPA 1020.7 1016.7 1014.8 1011.2 1007.6 1001.3 995.6 998.0 1005.3 1011.8 1016.9 1020.7 1010.0 MAX. QFF PRESSURE IN HPA 1024.2 1021.8 1020.7 1016.6 1012.9 1006.1 998.0 1002.2 1009.5 1018.4 1022.5 1025.6 1025.6 DAY 20 10 3 6 8 1 5 12 22 25 26 19 MIN. QFF PRESSURE IN HPA 1013.7 1009.5 1009.4 1006.0 1003.2 997.2 990.8 993.8 999.9 1005.8 1010.8 1014.6 990.8 DAY 12 5 17 19 23 20 21 4 1 12 7 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1021.2 1017.0 1015.5 1011.4 1007.7 1001.2 995.5 998.3 1005.8 1012.4 1017.5 1021.1 1010.4 MAX. QFE PRESSURE IN HPA 1024.5 1022.8 1021.0 1016.9 1012.3 1006.3 998.7 1002.4 1009.5 1018.8 1023.3 1025.7 1025.7 DAY 19 10 3 6 9 1 7 12 29 25 26 19 MIN. QFE PRESSURE IN HPA 1014.7 1008.7 1010.7 1005.5 1003.4 997.0 990.2 993.9 999.8 1006.8 1011.6 1015.5 990.2 DAY 12 23 17 23 23 20 21 3 1 12 7 11 MEAN QNH PRESSURE IN HPA 1021.8 1017.6 1016.1 1012.1 1008.4 1001.8 996.2 998.9 1006.4 1013.1 1018.2 1021.7 1011.0 MAX. QNH PRESSURE IN HPA 1025.1 1023.4 1021.6 1017.5 1012.9 1006.9 999.3 1003.0 1010.1 1019.4 1023.9 1026.3 1026.3 DAY 19 10 3 6 9 1 7 12 29 25 26 19 MIN. QNH PRESSURE IN HPA 1015.3 1009.3 1011.3 1006.1 1004.0 997.6 990.8 994.5 1000.4 1007.4 1012.2 1016.1 990.8 DAY 12 23 17 23 23 20 21 3 1 12 7 11 MEAN QFF PRESSURE IN HPA 1022.1 1017.9 1016.4 1012.3 1008.6 1002.0 996.4 999.1 1006.6 1013.1 1018.4 1022.0 1011.3 MAX. QFF PRESSURE IN HPA 1025.5 1023.7 1021.9 1017.8 1013.2 1007.2 999.6 1003.3 1010.4 1019.7 1024.3 1026.7 1026.7 DAY 19 10 3 6 9 1 7 12 29 25 26 19 MIN. QFF PRESSURE IN HPA 1015.6 1009.6 1011.6 1006.4 1004.3 997.8 991.1 994.7 1000.7 1007.7 1012.5 1016.4 991.1 DAY 12 23 17 23 23 20 21 3 1 12 7 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1020.7 1016.8 1015.1 1011.1 1007.1 1000.9 995.2 998.0 1005.2 1011.6 1016.5 1020.4 1009.9 MAX. QFE PRESSURE IN HPA 1024.5 1022.8 1021.0 1016.3 1011.4 1007.0 997.8 1002.0 1009.0 1017.5 1023.0 1025.4 1025.4 DAY 19 10 3 6 7 1 5 12 21 24 30 19 MIN. QFE PRESSURE IN HPA 1014.0 1009.1 1010.1 1006.5 1002.4 996.7 990.2 993.3 999.1 1007.0 1010.1 1012.8 990.2 DAY 11 23 17 23 23 20 21 3 1 12 6 11 MEAN QNH PRESSURE IN HPA 1021.3 1017.4 1015.7 1011.8 1007.8 1001.5 995.8 998.6 1005.8 1012.3 1017.1 1021.0 1010.5 MAX. QNH PRESSURE IN HPA 1025.1 1023.4 1021.6 1016.9 1012.0 1007.6 998.4 1002.6 1009.6 1018.1 1023.6 1026.0 1026.0 DAY 19 10 3 6 7 1 5 12 21 24 30 19 MIN. QNH PRESSURE IN HPA 1014.6 1009.7 1010.7 1007.1 1003.0 997.3 990.8 993.9 999.7 1007.6 1010.7 1013.4 990.8 DAY 11 23 17 23 23 20 21 3 1 12 6 11 MEAN QFF PRESSURE IN HPA 1021.6 1017.7 1016.0 1012.0 1008.0 1001.7 996.0 998.8 1006.1 1012.5 1017.4 1021.4 1010.8 MAX. QFF PRESSURE IN HPA 1025.4 1023.7 1021.9 1017.2 1012.3 1007.9 998.6 1002.9 1009.9 1018.4 1023.9 1026.3 1026.3 DAY 19 10 3 6 9 1 5 12 21 24 30 19 MIN. QFF PRESSURE IN HPA 1014.9 1010.0 1011.0 1007.4 1003.3 997.5 991.0 994.1 1000.0 1007.9 1011.0 1013.7 991.0 DAY 11 23 17 23 23 20 21 3 1 12 6 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1019.2 1014.9 1013.2 1009.6 1005.5 999.6 993.8 996.3 1003.5 1010.0 1014.9 1018.8 1008.3 MAX. QFE PRESSURE IN HPA 1023.0 1020.7 1018.8 1015.6 1010.7 1005.2 996.9 1000.4 1007.0 1015.8 1021.0 1022.3 1023.0 DAY 19 10 3 12 7 1 5 12 12 24 30 19 MIN. QFE PRESSURE IN HPA 1012.9 1008.1 1008.7 1006.1 1000.9 995.8 989.0 991.0 998.0 1005.3 1008.5 1011.3 989.0 DAY 11 23 17 24 23 18 20 3 1 11 6 11 MEAN QNH PRESSURE IN HPA 1019.8 1015.6 1013.9 1010.3 1006.1 1000.2 994.4 997.0 1004.1 1010.6 1015.6 1019.4 1008.9 MAX. QNH PRESSURE IN HPA 1023.6 1021.3 1019.4 1016.2 1011.3 1005.8 997.5 1001.0 1007.6 1016.4 1021.6 1022.9 1023.6 DAY 19 10 3 12 7 1 5 12 12 24 30 19 MIN. QNH PRESSURE IN HPA 1013.5 1008.7 1009.3 1006.7 1001.5 996.4 989.6 991.6 998.6 1005.9 1009.1 1011.9 989.6 DAY 11 23 17 24 23 18 20 3 1 11 6 11 MEAN QFF PRESSURE IN HPA 1020.1 1015.8 1014.1 1010.5 1006.3 1000.4 994.6 997.2 1004.4 1010.9 1015.8 1019.7 1009.2 MAX. QFF PRESSURE IN HPA 1023.9 1021.6 1019.7 1016.5 1011.6 1006.1 997.7 1001.3 1007.9 1016.7 1021.9 1023.2 1023.9 DAY 19 10 3 12 7 1 5 12 12 24 30 19 MIN. QFF PRESSURE IN HPA 1013.8 1009.0 1009.6 1007.0 1001.8 996.6 989.8 991.8 998.9 1006.2 1009.4 1012.2 989.8 DAY 11 23 17 24 23 18 20 3 1 11 6 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.2 1014.9 1013.0 1009.2 1004.8 998.9 993.2 995.8 1003.2 1009.8 1015.1 1019.1 1008.0 MAX. QFE PRESSURE IN HPA 1023.2 1020.7 1018.2 1015.2 1011.0 1004.0 996.4 999.8 1007.7 1016.3 1021.7 1023.5 1023.5 DAY 19 10 3 12 7 1 5 24 21 24 30 19 MIN. QFE PRESSURE IN HPA 1012.6 1009.8 1008.6 1005.7 1000.7 994.9 988.2 990.2 997.8 1004.5 1009.4 1012.9 988.2 DAY 11 23 14 18 23 24 20 3 1 11 6 11 MEAN QNH PRESSURE IN HPA 1019.8 1015.6 1013.6 1009.8 1005.5 999.5 993.8 996.5 1003.8 1010.5 1015.7 1019.8 1008.6 MAX. QNH PRESSURE IN HPA 1023.8 1021.3 1018.8 1015.8 1011.6 1004.6 997.0 1000.4 1008.3 1016.9 1022.3 1024.1 1024.1 DAY 19 10 3 12 7 1 5 24 21 24 30 19 MIN. QNH PRESSURE IN HPA 1013.2 1010.4 1009.2 1006.3 1001.3 995.5 988.8 990.8 998.4 1005.1 1010.0 1013.5 988.8 DAY 11 23 14 18 23 24 20 3 1 11 6 11 MEAN QFF PRESSURE IN HPA 1020.1 1015.8 1013.9 1010.1 1005.7 999.8 994.1 996.7 1004.1 1010.7 1016.0 1020.1 1008.9 MAX. QFF PRESSURE IN HPA 1024.1 1021.6 1019.1 1016.1 1011.9 1004.9 997.3 1000.7 1008.6 1017.2 1022.7 1024.5 1024.5 DAY 19 10 3 12 7 1 5 24 21 24 30 19 MIN. QFF PRESSURE IN HPA 1013.5 1010.7 1009.5 1006.6 1001.6 995.8 989.0 991.0 998.7 1005.4 1010.3 1013.8 989.0 DAY 11 23 14 18 23 24 21 3 1 11 6 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1015.8 1013.8 1010.3 1005.8 999.9 994.2 997.0 1004.3 1010.8 1015.8 1020.0 1009.0 MAX. QFE PRESSURE IN HPA 1024.1 1021.5 1018.7 1016.3 1012.3 1005.1 996.6 1001.0 1008.7 1017.2 1022.0 1025.5 1025.5 DAY 19 10 2 12 7 2 4 19 21 24 30 19 MIN. QFE PRESSURE IN HPA 1013.9 1010.3 1008.6 1006.2 1001.5 996.0 989.2 991.2 998.1 1005.0 1009.4 1012.9 989.2 DAY 11 4 14 22 23 20 21 3 1 11 6 11 MEAN QNH PRESSURE IN HPA 1020.7 1016.5 1014.5 1010.9 1006.4 1000.5 994.9 997.6 1004.9 1011.4 1016.5 1020.6 1009.6 MAX. QNH PRESSURE IN HPA 1024.7 1022.1 1019.3 1016.9 1012.9 1005.7 997.2 1001.6 1009.3 1017.8 1022.6 1026.1 1026.1 DAY 19 10 2 12 7 2 4 19 21 24 30 19 MIN. QNH PRESSURE IN HPA 1014.5 1010.9 1009.2 1006.8 1002.1 996.6 989.8 991.8 998.7 1005.6 1010.0 1013.5 989.8 DAY 11 4 14 22 23 20 21 3 1 11 6 11 MEAN QFF PRESSURE IN HPA 1021.0 1016.8 1014.8 1011.2 1006.7 1000.7 995.1 997.9 1005.2 1011.4 1016.8 1020.9 1009.9 MAX. QFF PRESSURE IN HPA 1025.0 1022.5 1019.6 1017.2 1013.2 1006.0 997.5 1001.9 1009.6 1016.8 1023.0 1026.5 1026.5 DAY 19 10 2 12 7 2 5 19 21 25 30 19 MIN. QFF PRESSURE IN HPA 1014.8 1011.2 1009.5 1007.1 1002.3 996.8 990.0 992.0 999.0 1005.9 1010.3 1013.8 990.0 DAY 11 4 14 22 23 20 21 3 1 11 6 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1020.0 1015.7 1014.0 1010.3 1006.0 999.9 994.4 997.1 1004.3 1010.7 1015.9 1019.9 1009.0 MAX. QFE PRESSURE IN HPA 1024.1 1021.5 1018.7 1016.3 1013.8 1006.1 996.9 1001.5 1008.7 1017.0 1021.6 1025.5 1025.5 DAY 19 10 2 12 7 1 3 24 21 24 26 19 MIN. QFE PRESSURE IN HPA 1013.9 1009.3 1009.4 1006.1 1000.5 996.0 990.0 991.6 998.4 1004.4 1009.9 1011.2 990.0 DAY 11 4 14 18 23 19 20 3 1 11 6 11 MEAN QNH PRESSURE IN HPA 1020.6 1016.3 1014.6 1011.0 1006.7 1000.5 995.1 997.7 1004.9 1011.4 1016.6 1020.5 1009.6 MAX. QNH PRESSURE IN HPA 1024.7 1022.1 1019.3 1016.9 1014.4 1006.7 997.5 1002.1 1009.3 1017.6 1022.2 1026.1 1026.1 DAY 19 10 2 12 7 1 3 24 21 24 26 19 MIN. QNH PRESSURE IN HPA 1014.5 1009.9 1010.0 1006.7 1001.1 996.6 990.6 992.2 999.0 1005.0 1010.5 1011.8 990.6 DAY 11 4 14 18 23 19 20 3 1 11 6 11 MEAN QFF PRESSURE IN HPA 1020.9 1016.6 1014.9 1011.2 1006.9 1000.7 995.3 998.0 1005.2 1011.6 1016.8 1020.8 1009.9 MAX. QFF PRESSURE IN HPA 1025.0 1022.4 1019.6 1017.2 1014.7 1007.0 997.7 1002.4 1009.6 1017.9 1022.6 1026.4 1026.4 DAY 19 10 2 12 7 1 3 24 21 24 26 19 MIN. QFF PRESSURE IN HPA 1014.8 1010.2 1010.3 1007.0 1001.3 996.8 990.8 992.4 999.3 1005.3 1010.8 1012.1 990.8 DAY 11 4 14 18 23 20 21 3 1 11 6 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.9 15.3 18.0 23.2 31.7 34.0 37.2 35.3 30.8 24.5 18.4 15.5 24.7 MINIMUN AIR TEMPERATURE (C) 8.8 10.9 12.6 16.5 23.3 23.4 28.3 25.5 20.9 16.0 11.4 10.0 17.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 29 25 31 31 12 4 0 0 134 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 3.4 5.4 7.6 12.6 19.6 19.0 24.6 21.0 17.0 9.4 5.4 4.4 3.4 DAY 27 4 6 11 2 12 30 25 24 31 12 16 MAXIMUM AIR TEMPERATURE (C) 17.9 20.7 23.6 29.7 39.4 43.2 46.4 45.9 41.4 34.2 26.7 22.4 32.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 14 31 30 31 31 30 28 5 0 201 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.8 25.8 30.0 35.6 45.6 46.8 50.0 48.0 46.2 43.6 31.6 26.0 50.0 DAY 31 8 31 30 28 18 25 1 12 2 6 3 DIF. BETWEEN (MAX.-MIN.) (C) 9.1 9.8 11.0 13.2 16.1 19.8 18.1 20.4 20.5 18.2 15.3 12.4 15.3 MEAN DAILY TEMP. (MDT) (C) 13.3 15.8 18.1 23.1 31.4 33.3 37.3 35.7 31.2 25.1 19.1 16.2 25.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.8 71.7 322.3 368.2 505.9 455.0 304.5 132.9 7.8 0.0 2170.2 HEATING DEG. DAYS(BASE 18 0C) 144.8 68.0 25.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13.6 63.0 314.5 DEWPOINT (MEAN C) 8.9 9.9 9.9 12.6 14.2 14.0 17.3 16.5 12.8 9.9 9.1 10.1 12.1 MIXING RATIO (G/KG) 7.22 7.74 7.88 9.32 10.50 10.86 13.25 12.40 9.64 7.88 7.39 7.79 9.32 VAPOUR PRESSURE (HPA) 11.66 12.45 12.63 14.90 16.66 17.08 20.73 19.47 15.29 12.63 11.93 12.59 14.83 SATURATION DEF. (HPA) 3.61 5.42 8.56 14.70 31.98 38.91 45.79 41.00 32.55 20.32 10.41 5.73 21.58 RELATIVE HUMIDITY (MEAN %) 79 73 63 55 38 34 34 36 37 43 58 72 52 RELATIVE HUMIDITY (MAX. %) 94 91 86 77 61 54 54 57 55 66 77 88 72 RELATIVE HUMIDITY (MIN. %) 56 50 39 35 19 17 17 19 20 22 35 49 32 RELATIVE HUMIDITY (MEAN% 03UTC) 89 85 83 72 54 47 45 50 52 62 74 87 67 RELATIVE HUMIDITY (MEAN% 09UTC) 67 57 48 41 23 20 24 23 23 27 41 60 38 RELATIVE HUMIDITY (MEAN% 15UTC) 76 67 49 44 30 27 30 31 32 39 55 67 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 70.8 70.0 27.4 74.3 0.0 0.0 0.0 0.0 0.0 2.0 8.0 11.1 263.6 DAYS WITH PRECIPITATION >=10 3 3 2 2 0 0 0 0 0 0 0 0 10 DAYS WITH PRECIPITATION >= 5 5 4 2 3 0 0 0 0 0 0 1 1 16 DAYS WITH PRECIPITATION >= 1 8 9 4 4 0 0 0 0 0 1 3 2 31 DAYS WITH PRECIPITATION 10 10 8 6 0 0 0 0 0 1 4 4 43 GREATEST DAILY PRECIPITATION 21.0 19.0 13.0 53.0 0.0 0.0 0.0 0.0 0.0 2.0 6.0 7.0 53.0 DAY 11 18 23 14 ** ** ** ** ** 9 28 14 DAY WITH THUNDER STORM 2 3 6 7 4 0 2 0 0 1 0 4 29 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 2 3 2 2 3 2 2 5 1 0 0 23 WIND DIRECTION (PREVAILING) 90 90 270 270 225 270 270 270 270 270 270 90 270 PREVAILING WIND SPEED(KNOTS) 9.1 9.0 9.9 10.2 9.1 12.2 8.5 9.5 9.7 8.9 8.0 8.4 9.5 PREVAILING WIND PERCENT 23.4 24.1 18.5 30.8 20.7 38.3 27.0 29.0 45.0 19.4 31.3 29.4 26.6 CALMS PERCENT OF WIND 10.1 6.9 12.5 5.0 19.9 12.9 12.1 12.1 9.2 23.0 16.3 8.5 12.4 NO. OF WIND OBSERVATION 248 232 248 240 246 240 248 248 240 248 240 248 2926 VECTOR WIND DIRECTION (MEAN) 62 51 110 263 265 270 243 258 271 266 289 46 271 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.0 0.5 1.2 2.4 6.3 2.9 3.9 6.4 1.6 3.6 1.3 2.1 WIND STEADINESES (MEAN %) 14.5 12.2 6.2 12.6 36.4 71.6 37.7 53.4 79.0 26.2 57.1 18.3 27.6 WIND SPEED (MEAN KNOTS) 6.9 8.2 8.1 9.5 6.6 8.8 7.7 7.3 8.1 6.1 6.3 7.1 7.6 FASTEST WIND DIRECTION 90 270 150 180 150 270 150 290 290 80 300 180 270 FASTEST WIND SPEED (KNOTS) 23 25 31 23 31 33 31 31 27 29 19 23 33 DAY 6 5 2 12 11 21 16 24 13 9 9 10 DAYS WITH SKY CLEAR (0-2)/8 7 9 10 16 18 29 22 30 29 29 16 15 230 DAYS WITH P.CLOUDY (3-6)/8 15 11 15 11 10 1 9 1 1 2 7 10 93 DAYS WITH CLOUDY (7-8)/8 9 9 6 3 3 0 0 0 0 0 7 6 43 DAYS WITH VISIBILITY =< 2 KM 4 2 1 1 0 0 0 0 0 0 1 2 11 DURATION OF SUNSHINE HOURS 162.0 178.0 228.5 265.9 309.4 374.7 356.3 358.5 307.0 308.5 201.4 203.4 3253.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.1 1014.0 1011.3 1010.1 1005.1 999.3 996.0 997.7 1002.9 1011.3 1016.6 1019.0 1008.4 MAX. QFE PRESSURE IN HPA 1025.0 1020.7 1020.3 1016.0 1010.1 1006.3 1004.0 1003.2 1012.0 1017.7 1024.1 1023.0 1025.0 DAY-HOUR 26- 6 6- 9 29- 6 15- 9 17- 6 7- 6 3- 9 27- 6 25- 9 31- 6 16- 6 24- 6 MIN. QFE PRESSURE IN HPA 1003.7 1005.4 1000.0 1002.6 997.9 993.7 991.4 992.1 997.3 1004.1 1009.2 1014.7 991.4 DAY-HOUR 12- 3 10-12 12-12 12-12 28-15 16-15 6-15 3-15 15-15 4-12 6-15 22-12 MEAN QNH PRESSURE IN HPA 1017.7 1014.7 1012.0 1010.7 1005.7 999.9 996.6 998.3 1003.5 1012.0 1017.3 1019.6 1009.0 MAX. QNH PRESSURE IN HPA 1025.6 1021.3 1020.9 1016.6 1010.7 1006.9 1004.6 1003.8 1012.6 1018.3 1024.7 1023.6 1025.6 DAY-HOUR 26- 6 6- 9 29- 6 15- 9 17- 6 7- 6 3- 9 27- 6 25- 9 31- 6 16- 6 24- 6 MIN. QNH PRESSURE IN HPA 1004.3 1006.0 1000.6 1003.2 998.5 994.3 992.0 992.7 997.9 1004.7 1009.8 1015.3 992.0 DAY-HOUR 12- 3 10-12 12-12 12-12 28-15 16-15 6-15 3-15 15-15 4-12 6-15 22-12 MEAN QFF PRESSURE IN HPA 1018.0 1015.0 1012.2 1011.0 1006.0 1000.2 996.8 998.5 1003.8 1012.2 1017.6 1019.9 1009.3 MAX. QFF PRESSURE IN HPA 1026.0 1021.6 1021.2 1016.9 1011.0 1007.2 1004.8 1004.1 1012.9 1018.6 1025.0 1023.9 1026.0 DAY-HOUR 26- 6 6- 9 29- 6 15- 9 17- 6 7- 6 3- 9 27- 6 25- 9 31- 6 16- 6 24- 6 MIN. QFF PRESSURE IN HPA 1004.6 1006.3 1000.9 1003.5 998.8 994.6 992.2 992.9 998.2 1005.0 1010.1 1015.6 992.2 DAY-HOUR 12- 3 10-12 12-12 12-12 28-15 16-15 6-15 3-15 15-15 4-12 6-15 22-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1013.7 1011.0 1009.8 1004.3 998.7 995.4 997.0 1002.4 1010.9 1016.4 1018.8 1007.9 MAX. QFE PRESSURE IN HPA 1023.7 1019.0 1019.0 1013.7 1007.9 1003.1 1000.8 1002.0 1009.2 1016.6 1023.2 1021.0 1023.7 DAY 26 6 29 27 17 8 4 28 26 31 16 24 MIN. QFE PRESSURE IN HPA 1004.6 1008.8 1004.7 1005.6 999.5 994.3 991.6 992.9 999.2 1004.2 1010.9 1016.6 991.6 DAY 12 16 7 3 29 18 15 4 15 5 7 22 MEAN QNH PRESSURE IN HPA 1017.4 1014.4 1011.6 1010.4 1005.0 999.4 996.0 997.6 1003.0 1011.6 1017.0 1019.5 1008.6 MAX. QNH PRESSURE IN HPA 1024.3 1019.6 1019.6 1014.3 1008.5 1003.7 1001.4 1002.6 1009.8 1017.2 1023.8 1021.6 1024.3 DAY 26 6 29 27 17 8 4 28 26 31 16 24 MIN. QNH PRESSURE IN HPA 1005.2 1009.4 1005.3 1006.2 1000.1 994.9 992.2 993.5 999.8 1004.8 1011.5 1017.2 992.2 DAY 12 16 7 3 29 18 15 4 15 5 7 22 MEAN QFF PRESSURE IN HPA 1017.7 1014.7 1011.9 1010.7 1005.2 999.7 996.2 997.8 1003.2 1011.9 1017.3 1019.8 1008.8 MAX. QFF PRESSURE IN HPA 1024.6 1019.9 1019.9 1014.6 1008.8 1004.0 1001.7 1002.8 1010.1 1017.5 1024.1 1021.9 1024.6 DAY 26 6 29 27 17 8 4 28 26 31 16 24 MIN. QFF PRESSURE IN HPA 1005.5 1009.7 1005.6 1006.5 1000.4 995.1 992.4 993.7 1000.1 1005.1 1011.8 1017.5 992.4 DAY 12 16 7 3 29 18 15 4 15 5 7 22 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1014.1 1011.5 1010.3 1005.5 999.6 996.4 998.0 1003.0 1011.4 1016.6 1019.0 1008.5 MAX. QFE PRESSURE IN HPA 1023.8 1019.0 1019.7 1014.0 1009.1 1004.9 1002.0 1002.1 1010.2 1016.6 1023.6 1021.5 1023.8 DAY 26 6 29 15 17 7 3 27 25 31 16 28 MIN. QFE PRESSURE IN HPA 1003.7 1009.1 1004.7 1006.2 1000.3 995.3 992.6 993.4 999.2 1004.7 1011.8 1016.6 992.6 DAY 12 10 7 18 29 18 6 3 15 5 6 22 MEAN QNH PRESSURE IN HPA 1017.3 1014.8 1012.2 1010.9 1006.1 1000.3 997.0 998.6 1003.7 1012.0 1017.2 1019.7 1009.1 MAX. QNH PRESSURE IN HPA 1024.4 1019.6 1020.3 1014.6 1009.7 1005.5 1002.6 1002.7 1010.8 1017.2 1024.2 1022.1 1024.4 DAY 26 6 29 15 17 7 3 27 25 31 16 28 MIN. QNH PRESSURE IN HPA 1004.3 1009.7 1005.3 1006.8 1000.9 995.9 993.2 994.0 999.8 1005.3 1012.4 1017.2 993.2 DAY 12 10 7 18 29 18 6 3 15 5 6 22 MEAN QFF PRESSURE IN HPA 1017.6 1015.1 1012.4 1011.2 1006.4 1000.5 997.3 998.9 1003.9 1012.3 1017.5 1020.0 1009.4 MAX. QFF PRESSURE IN HPA 1024.8 1020.0 1020.6 1014.9 1010.0 1005.8 1002.9 1003.0 1011.1 1017.5 1024.5 1022.4 1024.8 DAY 26 6 29 15 17 7 4 27 25 31 16 28 MIN. QFF PRESSURE IN HPA 1004.6 1010.0 1005.6 1007.1 1001.2 996.2 993.4 994.3 1000.1 1005.6 1012.7 1017.5 993.4 DAY 12 10 7 18 29 18 6 3 15 5 6 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.5 1015.4 1012.7 1011.6 1006.5 1000.7 997.4 999.2 1004.2 1012.8 1018.1 1020.6 1009.8 MAX. QFE PRESSURE IN HPA 1025.0 1020.6 1020.3 1015.9 1010.1 1006.3 1003.6 1003.2 1011.7 1017.7 1024.1 1023.0 1025.0 DAY 26 6 29 15 17 7 3 27 25 31 16 24 MIN. QFE PRESSURE IN HPA 1005.6 1009.1 1004.3 1008.0 1002.0 996.6 993.3 994.5 1000.0 1006.0 1013.5 1017.4 993.3 DAY 12 10 7 18 28 17 6 14 15 4 6 22 MEAN QNH PRESSURE IN HPA 1019.1 1016.1 1013.3 1012.2 1007.1 1001.3 998.1 999.8 1004.8 1013.4 1018.7 1021.2 1010.4 MAX. QNH PRESSURE IN HPA 1025.6 1021.2 1020.9 1016.5 1010.7 1006.9 1004.2 1003.8 1012.3 1018.3 1024.7 1023.6 1025.6 DAY 26 6 29 15 17 7 3 27 25 31 16 24 MIN. QNH PRESSURE IN HPA 1006.2 1009.7 1004.9 1008.6 1002.6 997.2 993.9 995.1 1000.6 1006.6 1014.1 1018.0 993.9 DAY 12 10 7 18 28 17 6 14 15 4 6 22 MEAN QFF PRESSURE IN HPA 1019.4 1016.3 1013.6 1012.5 1007.4 1001.6 998.3 1000.0 1005.1 1013.7 1019.0 1021.5 1010.7 MAX. QFF PRESSURE IN HPA 1026.0 1021.6 1021.2 1016.8 1011.0 1007.2 1004.5 1004.1 1012.6 1018.6 1025.0 1023.9 1026.0 DAY 26 6 29 15 17 7 3 27 25 31 16 24 MIN. QFF PRESSURE IN HPA 1006.5 1010.0 1005.2 1008.9 1002.9 997.4 994.1 995.4 1000.9 1006.9 1014.4 1018.3 994.1 DAY 12 10 7 18 28 17 6 14 15 4 6 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.0 1014.8 1012.1 1011.0 1006.1 1000.4 997.1 998.7 1003.7 1012.1 1017.2 1019.8 1009.2 MAX. QFE PRESSURE IN HPA 1025.0 1020.7 1019.3 1016.0 1010.1 1005.9 1004.0 1002.8 1012.0 1016.1 1022.8 1022.8 1025.0 DAY 26 6 29 15 17 7 3 27 25 18 16 11 MIN. QFE PRESSURE IN HPA 1005.6 1006.6 1004.2 1005.6 1001.0 996.4 993.3 994.1 999.2 1005.1 1011.8 1016.6 993.3 DAY 12 10 12 12 28 17 6 14 15 4 6 22 MEAN QNH PRESSURE IN HPA 1018.6 1015.4 1012.8 1011.7 1006.8 1001.0 997.7 999.3 1004.4 1012.7 1017.9 1020.4 1009.9 MAX. QNH PRESSURE IN HPA 1025.6 1021.3 1019.9 1016.6 1010.7 1006.5 1004.6 1003.4 1012.6 1016.7 1023.4 1023.4 1025.6 DAY 26 6 29 15 17 7 3 27 25 18 16 11 MIN. QNH PRESSURE IN HPA 1006.2 1007.2 1004.8 1006.2 1001.6 997.0 993.9 994.7 999.8 1005.7 1012.4 1017.2 993.9 DAY 12 10 12 12 28 17 6 14 15 4 6 22 MEAN QFF PRESSURE IN HPA 1018.9 1015.7 1013.0 1011.9 1007.0 1001.2 997.9 999.5 1004.6 1013.0 1018.1 1020.7 1010.1 MAX. QFF PRESSURE IN HPA 1025.9 1021.6 1020.2 1016.9 1011.0 1006.8 1004.8 1003.7 1012.9 1017.0 1023.7 1023.7 1025.9 DAY 26 6 29 15 17 7 3 27 25 18 16 11 MIN. QFF PRESSURE IN HPA 1006.5 1007.5 1005.1 1006.5 1001.8 997.2 994.1 994.9 1000.1 1006.0 1012.7 1017.5 994.1 DAY 12 10 12 12 28 17 6 14 15 4 6 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.3 1013.1 1010.3 1009.3 1004.7 999.0 995.6 997.2 1002.1 1010.5 1015.8 1018.0 1007.7 MAX. QFE PRESSURE IN HPA 1022.9 1018.2 1017.9 1014.0 1008.0 1004.2 1001.9 1001.6 1010.3 1014.8 1021.8 1020.1 1022.9 DAY 25 6 28 15 5 7 3 28 25 17 16 11 MIN. QFE PRESSURE IN HPA 1006.0 1005.4 1000.0 1002.6 999.0 995.1 992.0 992.8 997.6 1004.1 1009.6 1014.7 992.0 DAY 12 10 12 12 28 16 6 14 15 4 6 22 MEAN QNH PRESSURE IN HPA 1016.9 1013.7 1011.0 1010.0 1005.3 999.7 996.2 997.8 1002.7 1011.2 1016.4 1018.6 1008.3 MAX. QNH PRESSURE IN HPA 1023.5 1018.8 1018.5 1014.6 1008.6 1004.8 1002.5 1002.2 1010.9 1015.4 1022.4 1020.7 1023.5 DAY 25 6 28 15 5 7 3 28 25 17 16 11 MIN. QNH PRESSURE IN HPA 1006.6 1006.0 1000.6 1003.2 999.6 995.7 992.6 993.4 998.2 1004.7 1010.2 1015.3 992.6 DAY 12 10 12 12 28 16 6 14 15 4 6 22 MEAN QFF PRESSURE IN HPA 1017.2 1014.0 1011.2 1010.2 1005.6 999.9 996.4 998.0 1003.0 1011.6 1016.7 1018.9 1008.6 MAX. QFF PRESSURE IN HPA 1023.8 1019.1 1018.8 1014.9 1008.9 1005.1 1002.7 1002.5 1011.2 1015.7 1022.7 1021.0 1023.8 DAY 25 6 28 15 5 7 3 28 25 17 16 11 MIN. QFF PRESSURE IN HPA 1006.9 1006.3 1000.9 1003.5 999.9 995.9 992.8 993.6 998.5 1005.0 1010.5 1015.6 992.8 DAY 12 10 12 12 28 16 6 14 15 4 6 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.5 1013.2 1010.3 1008.8 1004.0 998.3 994.7 996.6 1001.9 1010.4 1015.9 1018.1 1007.4 MAX. QFE PRESSURE IN HPA 1022.9 1017.9 1018.3 1013.6 1007.9 1003.2 1000.7 1000.3 1010.0 1014.8 1023.0 1020.9 1023.0 DAY 25 6 28 15 11 7 3 28 25 30 15 24 MIN. QFE PRESSURE IN HPA 1008.0 1006.3 1002.9 1004.2 997.9 993.7 991.4 992.1 997.3 1004.1 1009.2 1015.3 991.4 DAY 12 10 12 12 28 16 6 3 15 4 6 22 MEAN QNH PRESSURE IN HPA 1017.1 1013.8 1011.0 1009.4 1004.7 998.9 995.4 997.2 1002.5 1011.0 1016.6 1018.7 1008.0 MAX. QNH PRESSURE IN HPA 1023.5 1018.5 1018.9 1014.2 1008.5 1003.8 1001.3 1000.9 1010.6 1015.4 1023.6 1021.5 1023.6 DAY 25 6 28 15 11 7 3 28 25 30 15 24 MIN. QNH PRESSURE IN HPA 1008.6 1006.9 1003.5 1004.8 998.5 994.3 992.0 992.7 997.9 1004.7 1009.8 1015.9 992.0 DAY 12 10 12 12 28 16 6 3 15 4 6 22 MEAN QFF PRESSURE IN HPA 1017.4 1014.1 1011.2 1009.7 1004.9 999.1 995.6 997.4 1002.8 1011.3 1016.9 1019.0 1008.3 MAX. QFF PRESSURE IN HPA 1023.8 1018.8 1019.2 1014.5 1008.8 1004.1 1001.6 1001.2 1010.9 1015.7 1023.9 1021.8 1023.9 DAY 25 6 28 15 11 7 3 28 25 30 15 24 MIN. QFF PRESSURE IN HPA 1008.9 1007.2 1003.8 1005.1 998.8 994.6 992.2 992.9 998.2 1005.0 1010.1 1016.2 992.2 DAY 12 10 12 12 28 16 6 3 15 4 6 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1014.0 1011.3 1009.7 1004.8 999.0 995.7 997.5 1003.1 1011.3 1016.7 1019.0 1008.3 MAX. QFE PRESSURE IN HPA 1024.1 1018.8 1019.9 1013.5 1007.8 1003.7 1001.7 1001.7 1010.5 1016.4 1022.8 1021.2 1024.1 DAY 25 6 28 25 17 7 3 27 25 30 15 24 MIN. QFE PRESSURE IN HPA 1006.1 1007.8 1004.8 1004.9 999.3 994.7 992.4 992.9 999.1 1005.3 1009.4 1016.2 992.4 DAY 11 10 18 2 28 17 5 3 15 4 6 13 MEAN QNH PRESSURE IN HPA 1018.0 1014.7 1011.9 1010.4 1005.4 999.7 996.3 998.1 1003.7 1011.9 1017.3 1019.6 1008.9 MAX. QNH PRESSURE IN HPA 1024.7 1019.4 1020.5 1014.1 1008.4 1004.3 1002.3 1002.3 1011.1 1017.0 1023.4 1021.8 1024.7 DAY 25 6 28 25 17 7 3 27 25 30 15 24 MIN. QNH PRESSURE IN HPA 1006.7 1008.4 1005.4 1005.5 999.9 995.3 993.0 993.5 999.7 1005.9 1010.0 1016.8 993.0 DAY 11 10 18 2 28 17 5 3 15 4 6 13 MEAN QFF PRESSURE IN HPA 1018.3 1015.0 1012.2 1010.6 1005.7 1000.0 996.5 998.3 1004.0 1012.2 1017.6 1019.9 1009.2 MAX. QFF PRESSURE IN HPA 1025.1 1019.7 1020.8 1014.4 1008.7 1004.6 1002.6 1002.6 1011.4 1017.3 1023.7 1022.1 1025.1 DAY 25 6 28 25 17 7 3 27 25 30 15 24 MIN. QFF PRESSURE IN HPA 1007.0 1008.7 1005.7 1005.8 1000.2 995.5 993.2 993.7 1000.0 1006.2 1010.3 1017.1 993.2 DAY 11 10 18 2 28 17 14 3 15 4 6 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1014.2 1011.5 1010.2 1004.9 999.0 995.8 997.5 1003.0 1011.4 1016.6 1018.9 1008.3 MAX. QFE PRESSURE IN HPA 1023.9 1019.0 1020.1 1013.9 1008.4 1002.7 1001.7 1002.0 1010.5 1016.9 1022.8 1021.2 1023.9 DAY 25 5 28 15 11 6 3 27 25 30 15 24 MIN. QFE PRESSURE IN HPA 1004.9 1009.0 1006.3 1006.5 999.8 994.7 991.7 993.2 999.1 1004.7 1009.4 1016.2 991.7 DAY 11 4 18 2 28 17 14 3 15 4 6 21 MEAN QNH PRESSURE IN HPA 1017.7 1014.8 1012.2 1010.8 1005.6 999.6 996.4 998.1 1003.7 1012.0 1017.3 1019.6 1009.0 MAX. QNH PRESSURE IN HPA 1024.5 1019.6 1020.7 1014.5 1009.0 1003.3 1002.3 1002.6 1011.1 1017.5 1023.4 1021.8 1024.5 DAY 25 5 28 15 11 6 3 27 25 30 15 24 MIN. QNH PRESSURE IN HPA 1005.5 1009.6 1006.9 1007.1 1000.4 995.3 992.3 993.8 999.7 1005.3 1010.0 1016.8 992.3 DAY 11 4 18 2 28 17 14 3 15 4 6 21 MEAN QFF PRESSURE IN HPA 1018.0 1015.1 1012.4 1011.1 1005.8 1000.0 996.6 998.4 1003.9 1012.3 1017.5 1019.8 1009.2 MAX. QFF PRESSURE IN HPA 1024.8 1019.9 1021.0 1014.8 1009.3 1003.6 1002.5 1002.8 1011.4 1017.8 1023.7 1022.1 1024.8 DAY 25 5 28 15 11 6 3 27 25 30 15 24 MIN. QFF PRESSURE IN HPA 1005.8 1009.9 1007.2 1007.4 1000.6 995.5 992.5 994.0 1000.0 1005.6 1010.3 1017.1 992.5 DAY 11 4 18 2 28 17 14 3 15 4 6 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.1 10.9 15.3 22.5 30.5 34.7 35.0 34.2 31.1 26.4 18.4 12.3 23.6 MINIMUN AIR TEMPERATURE (C) 6.6 3.5 9.3 15.8 21.5 24.5 24.4 23.3 19.8 18.9 13.4 8.5 15.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 2 17 26 31 29 9 8 0 0 122 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 10 0 0 0 0 0 0 0 0 0 0 10 TEMPERATURE RECORDS LOWEST(C) 0.8 -2.6 0.6 6.2 12.6 17.4 21.0 19.0 14.0 12.0 8.2 4.8 -2.6 DAY 30 7 8 13 6 4 20 30 15 25 29 27 MAXIMUM AIR TEMPERATURE (C) 18.7 19.0 21.6 29.4 38.3 43.8 45.5 44.8 42.1 34.8 24.3 17.0 31.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 18 30 30 31 31 30 25 0 0 195 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 29.6 25.2 35.0 44.4 48.0 48.0 49.0 46.6 40.6 29.2 22.0 49.0 DAY 13 21 23 23 27 27 26 1 2 2 2 8 DIF. BETWEEN (MAX.-MIN.) (C) 12.1 15.5 12.3 13.6 16.8 19.3 21.1 21.5 22.3 15.9 10.9 8.5 15.8 MEAN DAILY TEMP. (MDT) (C) 12.6 11.2 15.5 22.6 29.9 34.1 34.9 34.0 30.9 26.9 18.9 12.8 23.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.5 0.0 77.4 275.8 394.2 431.3 404.1 298.3 183.6 7.9 0.0 2073.1 HEATING DEG. DAYS(BASE 18 0C) 166.4 193.1 83.1 11.7 0.0 0.0 0.0 0.0 0.0 0.0 18.6 162.5 635.4 DEWPOINT (MEAN C) 7.2 0.1 7.1 11.7 12.6 13.5 12.0 12.9 9.9 13.3 13.0 10.1 10.3 MIXING RATIO (G/KG) 6.47 3.98 6.59 9.03 9.37 10.18 9.13 9.57 7.88 9.92 9.54 7.77 8.29 VAPOUR PRESSURE (HPA) 10.47 6.46 10.60 14.43 14.92 16.08 14.38 15.11 12.57 15.86 15.32 12.55 13.23 SATURATION DEF. (HPA) 4.24 7.69 7.42 14.22 31.38 42.66 45.68 42.29 36.43 20.74 6.53 2.06 21.78 RELATIVE HUMIDITY (MEAN %) 75 51 62 54 37 31 28 30 30 49 73 88 51 RELATIVE HUMIDITY (MAX. %) 93 77 83 78 60 49 44 47 46 68 91 97 69 RELATIVE HUMIDITY (MIN. %) 51 25 39 31 18 16 14 15 15 29 49 70 31 RELATIVE HUMIDITY (MEAN% 03UTC) 90 75 80 75 53 45 43 47 45 65 88 95 67 RELATIVE HUMIDITY (MEAN% 09UTC) 64 34 47 38 23 20 18 21 18 37 58 82 38 RELATIVE HUMIDITY (MEAN% 15UTC) 65 38 52 41 26 22 20 20 24 41 68 83 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 26.9 0.0 107.1 15.0 0.0 0.2 0.0 0.0 0.0 18.4 103.8 76.2 347.6 DAYS WITH PRECIPITATION >=10 1 0 3 1 0 0 0 0 0 1 3 2 11 DAYS WITH PRECIPITATION >= 5 3 0 5 1 0 0 0 0 0 1 4 3 17 DAYS WITH PRECIPITATION >= 1 4 0 9 2 0 0 0 0 0 4 6 5 30 DAYS WITH PRECIPITATION 5 0 10 3 0 1 0 0 0 4 7 8 38 GREATEST DAILY PRECIPITATION 14.6 0.0 44.4 11.0 0.0 0.2 0.0 0.0 0.0 10.4 47.0 35.0 47.0 DAY 16 ** 29 18 ** 1 ** ** ** 20 4 20 DAY WITH THUNDER STORM 2 0 6 3 1 0 0 0 0 2 3 1 18 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 2 1 2 3 2 1 0 0 1 0 0 14 WIND DIRECTION (PREVAILING) 270 270 270 225 225 225 270 270 270 270 315 315 270 PREVAILING WIND SPEED(KNOTS) 9.1 9.2 9.4 8.5 7.8 8.5 12.4 12.4 9.0 8.1 8.1 6.7 10.2 PREVAILING WIND PERCENT 32.7 44.2 27.4 26.3 29.4 29.2 59.3 70.6 31.3 21.4 30.4 27.8 31.7 CALMS PERCENT OF WIND 6.0 11.2 15.3 7.9 18.1 23.8 8.9 2.8 27.5 25.0 34.2 21.0 16.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 292 285 242 260 256 262 269 275 281 293 309 296 277 VECTOR WIND MAGNITUDE(KNOTS) 3.1 5.2 1.2 0.7 3.5 4.0 9.3 10.9 4.2 1.8 3.1 2.2 4.0 WIND STEADINESES (MEAN %) 39.2 69.3 15.4 8.4 50.7 53.3 88.6 92.4 68.9 31.0 60.8 38.6 52.6 WIND SPEED (MEAN KNOTS) 7.9 7.5 7.8 8.3 6.9 7.5 10.5 11.8 6.1 5.8 5.1 5.7 7.6 FASTEST WIND DIRECTION 120 280 140 280 210 300 300 270 270 280 300 130 140 FASTEST WIND SPEED (KNOTS) 29 23 49 27 31 27 39 29 29 25 29 23 49 DAY 15 5 28 11 28 2 15 2 5 20 4 9 DAYS WITH SKY CLEAR (0-2)/8 14 24 11 15 20 24 31 28 29 15 15 11 237 DAYS WITH P.CLOUDY (3-6)/8 14 3 13 13 9 6 0 3 1 14 10 13 99 DAYS WITH CLOUDY (7-8)/8 3 1 7 2 2 0 0 0 0 2 5 7 29 DAYS WITH VISIBILITY =< 2 KM 8 0 4 1 1 0 0 0 0 1 4 15 34 DURATION OF SUNSHINE HOURS 190.9 270.5 232.2 274.9 322.6 357.0 377.4 353.1 327.9 253.6 211.9 146.3 3318.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.7 1018.9 1013.3 1010.5 1006.6 999.6 995.2 998.4 1005.5 1011.9 1015.5 1018.2 1009.3 MAX. QFE PRESSURE IN HPA 1023.1 1028.4 1024.1 1021.7 1014.2 1007.2 999.4 1003.7 1012.9 1017.4 1020.1 1025.2 1028.4 DAY-HOUR 19- 6 6- 6 1- 6 12- 6 6- 6 8- 6 26- 6 31- 9 30- 9 31- 6 8- 6 30- 6 MIN. QFE PRESSURE IN HPA 1006.3 1006.9 999.6 1001.9 999.7 991.7 991.5 992.9 998.3 1005.9 1011.3 1008.4 991.5 DAY-HOUR 16- 3 21-15 29- 3 4-15 30-15 29-15 12- 0 1- 0 2-18 6-12 11- 3 9-15 MEAN QNH PRESSURE IN HPA 1018.3 1019.5 1013.9 1011.1 1007.2 1000.3 995.8 999.0 1006.1 1012.5 1016.1 1018.8 1009.9 MAX. QNH PRESSURE IN HPA 1023.7 1029.0 1024.7 1022.3 1014.8 1007.8 1000.0 1004.3 1013.5 1018.0 1020.7 1025.8 1029.0 DAY-HOUR 19- 6 6- 6 1- 6 12- 6 6- 6 8- 6 26- 6 31- 9 30- 9 31- 6 8- 6 30- 6 MIN. QNH PRESSURE IN HPA 1006.9 1007.5 1000.2 1002.5 1000.3 992.3 992.1 993.5 998.9 1006.5 1011.9 1009.0 992.1 DAY-HOUR 16- 3 21-15 29- 3 4-15 30-15 29-15 12- 0 1- 0 2-18 6-12 11- 3 9-15 MEAN QFF PRESSURE IN HPA 1018.6 1019.8 1014.2 1011.4 1007.5 1000.5 996.1 999.2 1006.3 1012.8 1016.4 1019.1 1010.2 MAX. QFF PRESSURE IN HPA 1024.1 1029.4 1025.1 1022.6 1015.1 1008.1 1000.3 1004.6 1013.8 1018.3 1021.0 1026.1 1029.4 DAY-HOUR 19- 6 6- 6 1- 6 12- 6 6- 6 8- 6 26- 6 31- 9 30- 9 31- 6 8- 6 30- 6 MIN. QFF PRESSURE IN HPA 1007.2 1007.8 1000.5 1002.8 1000.6 992.5 992.3 993.7 999.1 1006.8 1012.2 1009.3 992.3 DAY-HOUR 16- 3 21-15 29- 3 4-15 30-15 29-15 12- 0 1- 0 2-21 6-12 11- 3 9-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1018.6 1012.8 1010.1 1006.4 999.2 994.7 997.8 1004.9 1011.4 1015.2 1017.8 1008.9 MAX. QFE PRESSURE IN HPA 1020.8 1025.8 1023.0 1020.3 1012.2 1005.8 997.0 1001.5 1012.0 1015.7 1019.0 1023.8 1025.8 DAY 19 7 1 13 6 8 7 31 30 29 8 30 MIN. QFE PRESSURE IN HPA 1007.4 1011.0 1001.7 1004.4 1000.7 992.1 991.5 992.9 998.3 1007.4 1012.2 1009.0 991.5 DAY 16 19 25 28 31 28 12 1 3 2 11 10 MEAN QNH PRESSURE IN HPA 1018.2 1019.2 1013.5 1010.7 1007.0 999.8 995.3 998.4 1005.5 1012.1 1015.9 1018.4 1009.5 MAX. QNH PRESSURE IN HPA 1021.4 1026.4 1023.6 1020.9 1012.8 1006.4 997.6 1002.1 1012.6 1016.3 1019.6 1024.4 1026.4 DAY 19 7 1 13 6 8 7 31 30 29 8 30 MIN. QNH PRESSURE IN HPA 1008.0 1011.6 1002.3 1005.0 1001.3 992.7 992.1 993.5 998.9 1008.0 1012.8 1009.6 992.1 DAY 16 19 25 28 31 28 12 1 3 2 11 10 MEAN QFF PRESSURE IN HPA 1018.5 1019.5 1013.8 1011.0 1007.2 1000.0 995.6 998.6 1005.8 1012.3 1016.1 1018.7 1009.8 MAX. QFF PRESSURE IN HPA 1021.7 1026.8 1023.9 1021.2 1013.1 1006.7 997.8 1002.4 1012.9 1016.6 1019.9 1024.7 1026.8 DAY 19 7 1 13 6 8 7 31 30 29 8 30 MIN. QFF PRESSURE IN HPA 1008.3 1011.9 1002.6 1005.3 1001.5 992.9 992.3 993.7 999.1 1008.3 1013.1 1009.9 992.3 DAY 16 19 25 28 31 28 12 1 3 2 11 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.7 1018.8 1013.2 1010.8 1007.1 1000.1 995.4 998.6 1005.5 1011.9 1015.3 1017.7 1009.4 MAX. QFE PRESSURE IN HPA 1021.0 1026.4 1022.8 1020.5 1012.9 1006.5 997.9 1002.2 1012.5 1016.1 1019.0 1023.8 1026.4 DAY 19 7 1 12 6 8 7 31 30 31 8 30 MIN. QFE PRESSURE IN HPA 1006.3 1011.0 999.6 1004.9 1002.0 992.9 992.4 993.6 1000.3 1007.2 1011.3 1009.8 992.4 DAY 16 19 29 5 31 28 12 1 3 6 11 10 MEAN QNH PRESSURE IN HPA 1018.4 1019.5 1013.9 1011.4 1007.7 1000.7 996.0 999.2 1006.1 1012.5 1016.0 1018.4 1010.0 MAX. QNH PRESSURE IN HPA 1021.6 1027.0 1023.4 1021.1 1013.5 1007.1 998.5 1002.8 1013.1 1016.7 1019.6 1024.4 1027.0 DAY 19 7 1 12 6 8 7 31 30 31 8 30 MIN. QNH PRESSURE IN HPA 1006.9 1011.6 1000.2 1005.5 1002.6 993.5 993.0 994.2 1000.9 1007.8 1011.9 1010.4 993.0 DAY 16 19 29 5 31 28 12 1 3 6 11 10 MEAN QFF PRESSURE IN HPA 1018.7 1019.8 1014.2 1011.7 1007.9 1001.0 996.2 999.5 1006.4 1012.8 1016.3 1018.7 1010.3 MAX. QFF PRESSURE IN HPA 1022.0 1027.4 1023.8 1021.4 1013.8 1007.4 998.8 1003.1 1013.4 1017.0 1019.9 1024.7 1027.4 DAY 19 7 1 12 6 8 25 31 30 31 29 30 MIN. QFF PRESSURE IN HPA 1007.2 1011.9 1000.5 1005.8 1002.9 993.7 993.3 994.5 1001.2 1008.1 1012.2 1010.7 993.3 DAY 16 19 29 5 31 28 12 1 3 6 11 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.3 1020.5 1014.7 1012.1 1008.2 1000.9 996.3 999.6 1006.9 1013.6 1016.9 1019.5 1010.7 MAX. QFE PRESSURE IN HPA 1023.1 1028.4 1024.1 1021.7 1014.2 1007.2 999.4 1003.4 1012.5 1017.4 1020.1 1025.2 1028.4 DAY 19 6 1 12 6 8 26 31 30 31 8 30 MIN. QFE PRESSURE IN HPA 1009.7 1012.5 1000.9 1006.1 1002.2 993.9 993.1 994.3 1002.1 1008.4 1013.8 1012.7 993.1 DAY 16 21 29 28 31 29 11 1 3 6 11 10 MEAN QNH PRESSURE IN HPA 1019.9 1021.1 1015.3 1012.7 1008.8 1001.6 996.9 1000.2 1007.5 1014.2 1017.6 1020.1 1011.3 MAX. QNH PRESSURE IN HPA 1023.7 1029.0 1024.7 1022.3 1014.8 1007.8 1000.0 1004.0 1013.1 1018.0 1020.7 1025.8 1029.0 DAY 19 6 1 12 6 8 26 31 30 31 8 30 MIN. QNH PRESSURE IN HPA 1010.3 1013.1 1001.5 1006.7 1002.8 994.5 993.7 994.9 1002.7 1009.0 1014.4 1013.3 993.7 DAY 16 21 29 28 31 29 11 1 3 6 11 10 MEAN QFF PRESSURE IN HPA 1020.2 1021.5 1015.6 1013.0 1009.1 1001.8 997.1 1000.5 1007.8 1014.5 1017.8 1020.4 1011.6 MAX. QFF PRESSURE IN HPA 1024.1 1029.4 1025.1 1022.6 1015.1 1008.1 1000.3 1004.3 1013.4 1018.3 1021.0 1026.1 1029.4 DAY 19 6 1 12 6 8 26 31 30 31 8 30 MIN. QFF PRESSURE IN HPA 1010.6 1013.4 1001.8 1007.0 1003.1 994.7 993.9 995.2 1003.0 1009.3 1014.7 1013.6 993.9 DAY 16 21 29 28 31 29 11 1 3 6 11 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1020.0 1014.3 1011.7 1007.6 1000.6 995.9 999.1 1006.4 1012.8 1016.2 1018.6 1010.2 MAX. QFE PRESSURE IN HPA 1022.8 1027.7 1023.5 1021.3 1014.2 1007.0 999.3 1003.7 1012.9 1017.0 1019.7 1023.9 1027.7 DAY 19 7 1 12 6 8 25 31 30 31 29 30 MIN. QFE PRESSURE IN HPA 1009.6 1011.3 1004.2 1006.1 1001.6 993.3 993.0 993.9 1000.8 1007.2 1013.8 1009.6 993.0 DAY 16 21 29 4 31 29 11 1 2 6 19 9 MEAN QNH PRESSURE IN HPA 1019.0 1020.7 1015.0 1012.3 1008.2 1001.2 996.6 999.8 1007.1 1013.5 1016.8 1019.3 1010.8 MAX. QNH PRESSURE IN HPA 1023.4 1028.3 1024.1 1021.9 1014.8 1007.6 999.9 1004.3 1013.5 1017.6 1020.3 1024.5 1028.3 DAY 19 7 1 12 6 8 25 31 30 31 29 30 MIN. QNH PRESSURE IN HPA 1010.2 1011.9 1004.8 1006.7 1002.2 993.9 993.6 994.5 1001.4 1007.8 1014.4 1010.2 993.6 DAY 16 21 29 4 31 29 11 1 2 6 19 9 MEAN QFF PRESSURE IN HPA 1019.3 1021.0 1015.2 1012.6 1008.5 1001.4 996.8 1000.0 1007.3 1013.7 1017.1 1019.6 1011.0 MAX. QFF PRESSURE IN HPA 1023.7 1028.7 1024.4 1022.2 1015.1 1007.9 1000.1 1004.6 1013.8 1017.9 1020.6 1024.8 1028.7 DAY 19 7 1 12 6 8 25 31 30 31 29 30 MIN. QFF PRESSURE IN HPA 1010.5 1012.2 1005.1 1007.0 1002.5 994.1 993.8 994.7 1001.6 1008.1 1014.7 1010.5 993.8 DAY 16 21 29 4 31 29 11 1 2 6 19 9 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.6 1017.9 1012.3 1009.9 1005.9 999.1 994.7 997.6 1004.8 1011.1 1014.7 1017.5 1008.5 MAX. QFE PRESSURE IN HPA 1020.9 1025.8 1020.9 1019.4 1011.9 1005.4 998.0 1002.3 1010.1 1015.2 1017.8 1022.4 1025.8 DAY 19 6 1 12 6 8 25 31 30 31 6 29 MIN. QFE PRESSURE IN HPA 1008.0 1008.0 1003.7 1003.9 1000.7 991.8 991.8 993.1 998.7 1005.9 1012.6 1008.6 991.8 DAY 16 21 29 4 31 29 16 1 2 6 19 9 MEAN QNH PRESSURE IN HPA 1017.2 1018.5 1013.0 1010.5 1006.5 999.8 995.3 998.3 1005.5 1011.7 1015.3 1018.1 1009.1 MAX. QNH PRESSURE IN HPA 1021.5 1026.4 1021.5 1020.0 1012.5 1006.0 998.6 1002.9 1010.7 1015.8 1018.4 1023.0 1026.4 DAY 19 6 1 12 6 8 25 31 30 31 6 29 MIN. QNH PRESSURE IN HPA 1008.6 1008.6 1004.3 1004.5 1001.3 992.4 992.4 993.7 999.3 1006.5 1013.2 1009.2 992.4 DAY 16 21 29 4 31 29 16 1 2 6 19 9 MEAN QFF PRESSURE IN HPA 1017.5 1018.8 1013.3 1010.8 1006.8 1000.0 995.6 998.5 1005.7 1012.0 1015.6 1018.4 1009.4 MAX. QFF PRESSURE IN HPA 1021.8 1026.8 1021.8 1020.3 1012.8 1006.3 998.8 1003.2 1011.0 1016.1 1018.7 1023.3 1026.8 DAY 19 6 1 12 6 8 25 31 30 31 29 29 MIN. QFF PRESSURE IN HPA 1008.9 1008.9 1004.6 1004.8 1001.6 992.6 992.6 993.9 999.5 1006.8 1013.5 1009.5 992.6 DAY 16 21 29 4 31 29 16 1 2 6 19 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.8 1017.7 1012.4 1009.3 1005.2 998.6 994.2 997.3 1004.5 1010.9 1014.8 1018.0 1008.3 MAX. QFE PRESSURE IN HPA 1021.1 1026.0 1020.6 1019.0 1011.4 1004.7 997.1 1001.5 1010.5 1014.8 1017.6 1023.1 1026.0 DAY 19 6 1 12 6 7 25 31 29 31 6 29 MIN. QFE PRESSURE IN HPA 1008.8 1006.9 1003.0 1001.9 999.7 991.7 991.6 993.3 998.4 1006.3 1012.6 1008.4 991.6 DAY 16 21 24 4 30 29 12 1 2 6 11 9 MEAN QNH PRESSURE IN HPA 1017.5 1018.3 1013.0 1009.9 1005.8 999.2 994.9 997.9 1005.1 1011.6 1015.5 1018.6 1008.9 MAX. QNH PRESSURE IN HPA 1021.7 1026.6 1021.2 1019.6 1012.0 1005.3 997.7 1002.1 1011.1 1015.4 1018.2 1023.7 1026.6 DAY 19 6 1 12 6 7 25 31 29 31 6 29 MIN. QNH PRESSURE IN HPA 1009.4 1007.5 1003.6 1002.5 1000.3 992.3 992.2 993.9 999.0 1006.9 1013.2 1009.0 992.2 DAY 16 21 24 4 30 29 12 1 2 6 11 9 MEAN QFF PRESSURE IN HPA 1017.8 1018.6 1013.3 1010.2 1006.1 999.4 995.1 998.2 1005.4 1011.8 1015.8 1018.9 1009.2 MAX. QFF PRESSURE IN HPA 1022.1 1027.0 1021.5 1019.9 1012.3 1005.6 998.0 1002.4 1011.4 1015.7 1018.5 1024.0 1027.0 DAY 19 6 1 12 6 7 25 31 29 31 6 29 MIN. QFF PRESSURE IN HPA 1009.7 1007.8 1003.9 1002.8 1000.6 992.5 992.5 994.2 999.2 1007.2 1013.5 1009.3 992.5 DAY 16 21 24 4 30 29 12 1 2 6 11 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1018.8 1013.2 1010.1 1006.2 999.4 995.3 998.6 1005.4 1011.8 1015.6 1018.4 1009.2 MAX. QFE PRESSURE IN HPA 1021.1 1026.2 1021.0 1019.9 1011.9 1006.2 998.4 1002.6 1012.1 1015.6 1019.3 1023.7 1026.2 DAY 19 6 1 12 6 7 6 31 29 31 7 29 MIN. QFE PRESSURE IN HPA 1008.7 1010.9 1003.4 1003.6 1000.4 992.2 993.0 995.0 998.3 1007.3 1013.5 1009.8 992.2 DAY 15 21 24 27 30 28 16 1 2 15 30 9 MEAN QNH PRESSURE IN HPA 1018.3 1019.4 1013.9 1010.7 1006.8 1000.0 995.9 999.2 1006.0 1012.4 1016.2 1019.1 1009.8 MAX. QNH PRESSURE IN HPA 1021.7 1026.8 1021.6 1020.5 1012.5 1006.8 999.0 1003.2 1012.7 1016.2 1019.9 1024.3 1026.8 DAY 19 6 1 12 6 7 6 31 29 31 7 29 MIN. QNH PRESSURE IN HPA 1009.3 1011.5 1004.0 1004.2 1001.0 992.8 993.6 995.6 998.9 1007.9 1014.1 1010.4 992.8 DAY 15 21 24 27 30 28 16 1 2 15 30 9 MEAN QFF PRESSURE IN HPA 1018.6 1019.8 1014.2 1011.0 1007.1 1000.2 996.1 999.4 1006.3 1012.7 1016.5 1019.4 1010.1 MAX. QFF PRESSURE IN HPA 1022.1 1027.2 1021.9 1020.8 1012.8 1007.1 999.3 1003.5 1013.0 1016.5 1020.2 1024.6 1027.2 DAY 19 6 1 12 6 7 6 31 29 31 7 29 MIN. QFF PRESSURE IN HPA 1009.6 1011.8 1004.3 1004.5 1001.3 993.0 993.9 995.8 999.2 1008.2 1014.4 1010.7 993.0 DAY 15 21 24 27 30 28 16 1 2 15 30 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1017.7 1018.9 1013.3 1010.3 1006.6 999.5 995.4 998.5 1005.3 1011.8 1015.4 1018.3 1009.3 MAX. QFE PRESSURE IN HPA 1021.1 1026.2 1020.8 1020.8 1012.2 1007.0 998.0 1002.3 1012.0 1015.7 1019.3 1024.0 1026.2 DAY 19 6 9 12 5 7 6 31 29 28 7 29 MIN. QFE PRESSURE IN HPA 1007.9 1011.0 1004.1 1003.3 1000.7 992.6 992.4 994.8 998.3 1007.4 1012.9 1009.0 992.4 DAY 15 18 24 27 30 28 11 1 2 1 11 9 MEAN QNH PRESSURE IN HPA 1018.4 1019.6 1013.9 1010.9 1007.2 1000.1 996.0 999.2 1006.0 1012.4 1016.1 1018.9 1009.9 MAX. QNH PRESSURE IN HPA 1021.7 1026.8 1021.4 1021.4 1012.8 1007.6 998.6 1002.9 1012.6 1016.3 1019.9 1024.6 1026.8 DAY 19 6 9 12 5 7 6 31 29 28 7 29 MIN. QNH PRESSURE IN HPA 1008.5 1011.6 1004.7 1003.9 1001.3 993.2 993.0 995.4 998.9 1008.0 1013.5 1009.6 993.0 DAY 15 18 24 27 30 28 11 1 2 1 11 9 MEAN QFF PRESSURE IN HPA 1018.7 1019.9 1014.2 1011.2 1007.4 1000.3 996.2 999.4 1006.2 1012.7 1016.4 1019.2 1010.1 MAX. QFF PRESSURE IN HPA 1022.0 1027.2 1021.8 1021.7 1013.1 1007.9 998.8 1003.2 1012.9 1016.6 1020.2 1024.9 1027.2 DAY 19 6 9 12 5 7 6 31 29 28 7 29 MIN. QFF PRESSURE IN HPA 1008.8 1011.9 1005.0 1004.2 1001.5 993.4 993.2 995.6 999.1 1008.3 1013.8 1009.9 993.2 DAY 15 18 24 27 30 28 11 1 2 1 11 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.2 13.7 17.1 24.1 29.9 35.8 36.6 36.8 32.4 25.7 20.2 15.2 24.8 MINIMUN AIR TEMPERATURE (C) 5.6 7.9 11.5 16.4 20.5 24.5 26.6 26.6 22.3 15.0 11.2 8.4 16.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 3 14 29 31 29 22 2 0 0 130 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 1.4 1.8 6.0 11.0 15.0 19.0 21.4 20.0 19.0 9.2 7.4 4.4 1.4 DAY 17 16 6 25 3 12 10 23 7 23 7 7 MAXIMUM AIR TEMPERATURE (C) 14.9 19.7 22.9 31.8 38.3 45.6 46.2 47.0 43.0 36.6 30.5 24.2 33.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 21 31 30 31 31 30 30 20 0 224 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.4 24.8 29.4 36.6 45.6 49.0 49.0 50.0 46.0 41.0 33.4 29.4 50.0 DAY 31 5 27 12 28 22 15 3 1 5 3 16 DIF. BETWEEN (MAX.-MIN.) (C) 9.3 11.8 11.4 15.4 17.8 21.1 19.6 20.4 20.7 21.6 19.3 15.8 17.0 MEAN DAILY TEMP. (MDT) (C) 10.2 13.8 17.2 24.1 29.4 35.1 36.4 36.8 32.6 25.8 20.8 16.3 24.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 4.5 99.6 261.3 421.7 476.6 488.6 348.7 149.9 17.7 0.0 2268.6 HEATING DEG. DAYS(BASE 18 0C) 240.3 120.2 48.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 56.0 465.1 DEWPOINT (MEAN C) 7.4 7.1 10.2 11.6 12.6 13.7 14.6 16.4 13.0 7.4 7.1 6.0 10.6 MIXING RATIO (G/KG) 6.49 6.40 7.96 8.80 9.48 10.17 10.98 12.33 9.74 6.56 6.47 6.00 8.45 VAPOUR PRESSURE (HPA) 10.51 10.35 12.80 14.07 15.08 16.06 17.23 19.36 15.45 10.53 10.44 9.71 13.47 SATURATION DEF. (HPA) 2.24 6.00 7.35 17.40 29.46 46.69 47.53 46.58 36.59 25.34 14.90 8.48 24.05 RELATIVE HUMIDITY (MEAN %) 84 68 67 50 39 30 30 34 34 35 47 58 48 RELATIVE HUMIDITY (MAX. %) 96 89 89 76 64 53 48 55 53 57 69 79 69 RELATIVE HUMIDITY (MIN. %) 65 42 43 25 19 14 15 16 17 16 23 33 27 RELATIVE HUMIDITY (MEAN% 03UTC) 93 85 84 69 59 48 45 52 53 55 66 76 65 RELATIVE HUMIDITY (MEAN% 09UTC) 77 51 53 29 23 17 19 21 21 20 31 43 34 RELATIVE HUMIDITY (MEAN% 15UTC) 79 58 58 42 28 19 21 24 26 27 39 53 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 70.9 9.4 84.3 0.9 2.2 0.0 0.0 0.0 0.0 0.4 0.0 14.1 182.2 DAYS WITH PRECIPITATION >=10 3 0 4 0 0 0 0 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 5 4 1 5 0 0 0 0 0 0 0 0 1 11 DAYS WITH PRECIPITATION >= 1 6 2 7 0 1 0 0 0 0 0 0 2 18 DAYS WITH PRECIPITATION 9 2 7 2 3 0 0 0 0 1 0 3 27 GREATEST DAILY PRECIPITATION 27.0 8.4 24.0 0.7 1.7 0.0 0.0 0.0 0.0 0.4 0.0 13.0 27.0 DAY 5 15 29 28 13 ** ** ** ** 9 ** 1 DAY WITH THUNDER STORM 1 1 2 3 4 1 0 0 0 1 0 2 15 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 1 0 1 2 1 0 0 1 6 WIND DIRECTION (PREVAILING) 270 270 315 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.3 8.3 7.8 9.4 8.8 12.8 12.3 7.7 8.1 6.8 6.2 6.5 8.5 PREVAILING WIND PERCENT 18.1 30.8 19.8 25.8 31.0 19.2 27.0 29.0 39.2 26.6 22.1 43.1 27.5 CALMS PERCENT OF WIND 39.1 23.2 31.9 31.7 55.2 70.4 51.6 37.9 10.0 28.2 28.3 17.3 35.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 288 293 288 271 272 274 266 260 275 286 295 281 276 VECTOR WIND MAGNITUDE(KNOTS) 0.6 3.3 0.8 2.1 3.6 3.3 3.8 2.6 4.8 2.7 0.6 2.5 2.5 WIND STEADINESES (MEAN %) 12.5 50.8 13.8 35.0 90.0 91.7 77.6 56.5 69.6 61.4 13.0 49.0 49.0 WIND SPEED (MEAN KNOTS) 4.8 6.5 5.8 6.0 4.0 3.6 4.9 4.6 6.9 4.4 4.6 5.1 5.1 FASTEST WIND DIRECTION 300 300 280 230 300 280 270 280 300 300 80 90 270 FASTEST WIND SPEED (KNOTS) 29 27 29 29 27 23 31 29 29 19 17 21 31 DAY 5 7 18 27 16 7 11 3 3 3 11 1 DAYS WITH SKY CLEAR (0-2)/8 14 15 11 18 21 27 24 27 26 30 22 12 247 DAYS WITH P.CLOUDY (3-6)/8 11 10 12 10 8 3 7 4 4 1 7 13 90 DAYS WITH CLOUDY (7-8)/8 6 3 8 2 2 0 0 0 0 0 1 6 28 DAYS WITH VISIBILITY =< 2 KM 11 1 3 0 0 0 0 0 0 0 0 0 15 DURATION OF SUNSHINE HOURS 174.8 219.2 213.2 298.3 337.7 367.9 363.2 349.4 312.7 316.1 252.4 207.7 3412.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.2 1016.5 1014.2 1010.0 1006.0 999.4 995.4 997.6 1002.9 1010.0 1015.0 1017.9 1008.6 MAX. QFE PRESSURE IN HPA 1025.4 1023.1 1021.8 1018.8 1012.8 1005.8 1000.9 1003.7 1008.5 1017.6 1019.2 1024.2 1025.4 DAY-HOUR 22- 6 5- 6 22- 6 2- 6 3- 6 1- 6 22- 6 25- 6 26- 6 25- 6 27- 6 5- 6 MIN. QFE PRESSURE IN HPA 1008.3 1007.8 1004.1 1001.8 999.1 991.7 991.1 992.6 997.7 1003.5 1010.7 1011.8 991.1 DAY-HOUR 29-12 7-15 1-12 22-15 29- 0 30-15 1-15 12-15 1-15 1-15 11-12 21-12 MEAN QNH PRESSURE IN HPA 1018.8 1017.1 1014.8 1010.6 1006.6 1000.0 996.0 998.2 1003.5 1010.6 1015.6 1018.6 1009.2 MAX. QNH PRESSURE IN HPA 1026.0 1023.7 1022.4 1019.4 1013.4 1006.4 1001.5 1004.3 1009.1 1018.2 1019.8 1024.8 1026.0 DAY-HOUR 22- 6 5- 6 22- 6 2- 6 3- 6 1- 6 22- 6 25- 6 26- 6 25- 6 27- 6 5- 6 MIN. QNH PRESSURE IN HPA 1008.9 1008.4 1004.7 1002.4 999.7 992.3 991.7 993.2 998.3 1004.1 1011.3 1012.4 991.7 DAY-HOUR 29-12 7-15 1-12 22-15 29- 0 30-15 1-15 12-15 1-15 1-15 11-12 21-12 MEAN QFF PRESSURE IN HPA 1019.1 1017.4 1015.1 1010.9 1006.9 1000.3 996.3 998.4 1003.8 1010.9 1015.9 1018.9 1009.5 MAX. QFF PRESSURE IN HPA 1026.4 1024.0 1022.7 1019.7 1013.7 1006.7 1001.7 1004.6 1009.4 1018.5 1020.1 1025.1 1026.4 DAY-HOUR 22- 6 5- 6 22- 6 2- 6 3- 6 1- 6 22- 6 25- 6 26- 6 25- 6 27- 6 6- 3 MIN. QFF PRESSURE IN HPA 1009.2 1008.7 1005.0 1002.7 1000.0 992.6 991.9 993.4 998.6 1004.4 1011.6 1012.7 991.9 DAY-HOUR 29-12 7-15 1-12 22-15 29- 0 30-15 2-15 12-15 1-15 1-15 11-12 21-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.8 1016.4 1013.6 1009.4 1005.5 999.1 994.8 997.0 1002.3 1009.4 1014.8 1017.8 1008.2 MAX. QFE PRESSURE IN HPA 1023.8 1020.9 1020.6 1016.5 1010.1 1003.9 998.4 1002.3 1006.8 1015.2 1017.8 1023.5 1023.8 DAY 15 3 22 2 3 5 22 26 26 26 27 6 MIN. QFE PRESSURE IN HPA 1010.1 1009.1 1005.4 1002.9 999.1 992.5 991.6 993.9 997.9 1004.3 1011.9 1013.1 991.6 DAY 13 8 18 21 29 23 2 13 2 2 16 21 MEAN QNH PRESSURE IN HPA 1018.5 1017.1 1014.3 1010.0 1006.1 999.7 995.4 997.6 1002.9 1010.0 1015.4 1018.4 1008.8 MAX. QNH PRESSURE IN HPA 1024.4 1021.5 1021.2 1017.1 1010.7 1004.5 999.0 1002.9 1007.4 1015.8 1018.4 1024.1 1024.4 DAY 15 3 22 2 3 5 22 26 26 26 27 6 MIN. QNH PRESSURE IN HPA 1010.7 1009.7 1006.0 1003.5 999.7 993.1 992.2 994.5 998.5 1004.9 1012.5 1013.7 992.2 DAY 13 8 18 21 29 23 2 13 2 2 16 21 MEAN QFF PRESSURE IN HPA 1018.8 1017.4 1014.6 1010.3 1006.3 999.9 995.6 997.8 1003.2 1010.3 1015.7 1018.7 1009.0 MAX. QFF PRESSURE IN HPA 1024.8 1021.8 1021.5 1017.4 1011.0 1004.8 999.2 1003.1 1007.7 1016.1 1018.7 1024.4 1024.8 DAY 15 3 22 2 3 5 22 26 26 26 27 6 MIN. QFF PRESSURE IN HPA 1011.0 1010.0 1006.3 1003.8 1000.0 993.3 992.4 994.7 998.7 1005.2 1012.8 1014.0 992.4 DAY 13 8 18 21 29 23 2 13 2 2 16 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.8 1016.5 1014.0 1010.1 1006.3 999.8 995.7 998.0 1003.1 1010.1 1015.2 1018.0 1008.7 MAX. QFE PRESSURE IN HPA 1023.9 1021.5 1020.8 1017.2 1011.1 1004.8 999.9 1002.1 1007.5 1016.1 1018.1 1024.2 1024.2 DAY 22 5 22 2 8 1 23 26 26 26 21 6 MIN. QFE PRESSURE IN HPA 1008.7 1009.6 1004.6 1003.2 1000.7 992.5 992.7 994.4 999.3 1004.8 1012.1 1012.9 992.5 DAY 12 8 1 21 29 23 2 13 1 10 10 24 MEAN QNH PRESSURE IN HPA 1018.4 1017.1 1014.6 1010.7 1006.9 1000.4 996.3 998.7 1003.7 1010.7 1015.9 1018.6 1009.3 MAX. QNH PRESSURE IN HPA 1024.5 1022.1 1021.4 1017.8 1011.7 1005.4 1000.5 1002.7 1008.1 1016.7 1018.7 1024.8 1024.8 DAY 22 5 22 2 8 1 23 26 26 26 21 6 MIN. QNH PRESSURE IN HPA 1009.3 1010.2 1005.2 1003.8 1001.3 993.1 993.3 995.0 999.9 1005.4 1012.7 1013.5 993.1 DAY 12 8 1 21 29 23 2 13 1 10 10 24 MEAN QFF PRESSURE IN HPA 1018.7 1017.4 1014.9 1010.9 1007.2 1000.7 996.5 998.9 1004.0 1011.0 1016.1 1018.9 1009.6 MAX. QFF PRESSURE IN HPA 1024.9 1022.4 1021.7 1018.1 1012.0 1005.7 1000.7 1002.9 1008.4 1017.0 1019.0 1025.1 1025.1 DAY 22 5 22 2 8 1 23 26 26 26 27 6 MIN. QFF PRESSURE IN HPA 1009.6 1010.5 1005.5 1004.1 1001.6 993.3 993.5 995.2 1000.2 1005.7 1013.0 1013.8 993.3 DAY 12 8 1 21 29 23 2 13 1 10 10 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.3 1018.0 1015.3 1011.5 1007.6 1000.8 996.7 999.2 1004.4 1011.6 1016.8 1019.5 1010.1 MAX. QFE PRESSURE IN HPA 1025.4 1023.1 1021.8 1018.8 1012.8 1005.8 1000.9 1003.7 1008.5 1017.6 1019.2 1024.2 1025.4 DAY 22 5 22 2 3 1 22 25 26 25 27 5 MIN. QFE PRESSURE IN HPA 1011.2 1011.4 1005.0 1004.3 1002.4 994.3 993.4 995.5 1000.5 1006.4 1015.1 1013.7 993.4 DAY 12 7 1 21 29 30 12 13 1 10 10 21 MEAN QNH PRESSURE IN HPA 1020.0 1018.7 1015.9 1012.1 1008.3 1001.4 997.4 999.8 1005.0 1012.2 1017.4 1020.1 1010.7 MAX. QNH PRESSURE IN HPA 1026.0 1023.7 1022.4 1019.4 1013.4 1006.4 1001.5 1004.3 1009.1 1018.2 1019.8 1024.8 1026.0 DAY 22 5 22 2 3 1 22 25 26 25 27 5 MIN. QNH PRESSURE IN HPA 1011.8 1012.0 1005.6 1004.9 1003.0 994.9 994.0 996.1 1001.1 1007.0 1015.7 1014.3 994.0 DAY 12 7 1 21 29 30 12 13 1 10 10 21 MEAN QFF PRESSURE IN HPA 1020.3 1019.0 1016.2 1012.4 1008.5 1001.6 997.6 1000.0 1005.2 1012.5 1017.7 1020.4 1010.9 MAX. QFF PRESSURE IN HPA 1026.4 1024.0 1022.7 1019.7 1013.7 1006.7 1001.7 1004.6 1009.4 1018.5 1020.1 1025.1 1026.4 DAY 22 5 22 2 3 1 22 25 26 25 27 5 MIN. QFF PRESSURE IN HPA 1012.1 1012.3 1005.9 1005.2 1003.3 995.2 994.3 996.3 1001.4 1007.3 1016.0 1014.6 994.3 DAY 29 7 1 21 29 30 12 13 1 10 16 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1017.4 1014.9 1011.1 1007.2 1000.3 996.3 998.7 1003.8 1010.7 1015.6 1018.5 1009.4 MAX. QFE PRESSURE IN HPA 1024.7 1022.3 1021.6 1018.6 1012.0 1005.3 1000.9 1002.8 1008.0 1016.7 1018.4 1023.1 1024.7 DAY 22 5 21 2 3 5 22 25 27 25 21 5 MIN. QFE PRESSURE IN HPA 1009.8 1009.7 1005.1 1004.5 1002.4 993.8 993.0 994.9 999.7 1005.7 1012.6 1012.6 993.0 DAY 29 7 18 21 29 30 12 13 3 1 11 21 MEAN QNH PRESSURE IN HPA 1019.4 1018.0 1015.6 1011.7 1007.8 1000.9 997.0 999.3 1004.4 1011.4 1016.2 1019.1 1010.1 MAX. QNH PRESSURE IN HPA 1025.3 1022.9 1022.2 1019.2 1012.6 1005.9 1001.5 1003.4 1008.6 1017.3 1019.0 1023.7 1025.3 DAY 22 5 21 2 3 5 22 25 27 25 21 5 MIN. QNH PRESSURE IN HPA 1010.4 1010.3 1005.7 1005.1 1003.0 994.4 993.6 995.5 1000.3 1006.3 1013.2 1013.2 993.6 DAY 29 7 18 21 29 30 12 13 3 1 11 21 MEAN QFF PRESSURE IN HPA 1019.7 1018.3 1015.9 1012.0 1008.0 1001.1 997.2 999.5 1004.6 1011.6 1016.5 1019.4 1010.3 MAX. QFF PRESSURE IN HPA 1025.7 1023.2 1022.5 1019.5 1012.9 1006.2 1001.7 1003.6 1008.9 1017.6 1019.3 1024.0 1025.7 DAY 22 5 21 2 3 5 22 25 27 25 21 5 MIN. QFF PRESSURE IN HPA 1010.7 1010.6 1006.0 1005.4 1003.3 994.6 993.8 995.7 1000.6 1006.6 1013.5 1013.5 993.8 DAY 29 7 18 21 29 30 12 13 3 1 11 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.4 1015.4 1013.3 1009.4 1005.5 998.9 994.8 997.1 1002.2 1009.1 1013.9 1017.1 1007.8 MAX. QFE PRESSURE IN HPA 1023.6 1020.0 1020.0 1016.8 1010.4 1004.5 998.7 1001.2 1006.4 1015.0 1017.1 1021.9 1023.6 DAY 14 2 21 2 3 5 22 25 27 25 21 6 MIN. QFE PRESSURE IN HPA 1008.3 1008.0 1004.1 1003.4 1000.7 992.3 991.8 993.5 997.9 1003.9 1010.7 1011.8 991.8 DAY 29 7 1 22 29 30 2 13 1 1 11 21 MEAN QNH PRESSURE IN HPA 1018.1 1016.1 1013.9 1010.1 1006.1 999.5 995.5 997.7 1002.8 1009.7 1014.6 1017.7 1008.5 MAX. QNH PRESSURE IN HPA 1024.2 1020.6 1020.6 1017.4 1011.0 1005.1 999.3 1001.8 1007.0 1015.6 1017.7 1022.5 1024.2 DAY 14 2 21 2 3 5 22 25 27 25 21 6 MIN. QNH PRESSURE IN HPA 1008.9 1008.6 1004.7 1004.0 1001.3 992.9 992.4 994.1 998.5 1004.5 1011.3 1012.4 992.4 DAY 29 7 1 22 29 30 2 13 1 1 11 21 MEAN QFF PRESSURE IN HPA 1018.4 1016.4 1014.2 1010.3 1006.3 999.7 995.7 997.9 1003.0 1010.0 1014.8 1018.0 1008.7 MAX. QFF PRESSURE IN HPA 1024.6 1020.9 1020.9 1017.7 1011.3 1005.4 999.5 1002.1 1007.3 1015.9 1018.0 1022.8 1024.6 DAY 14 2 21 2 3 5 22 25 27 25 21 6 MIN. QFF PRESSURE IN HPA 1009.2 1008.9 1005.0 1004.3 1001.6 993.1 992.6 994.3 998.7 1004.8 1011.6 1012.7 992.6 DAY 29 7 1 22 29 30 2 13 1 1 11 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.8 1015.4 1013.3 1008.8 1004.7 998.2 994.2 996.4 1001.9 1009.0 1014.0 1017.2 1007.6 MAX. QFE PRESSURE IN HPA 1024.5 1020.6 1020.2 1015.9 1009.9 1003.6 997.5 999.4 1006.6 1014.8 1017.5 1021.9 1024.5 DAY 14 2 21 2 2 5 19 25 25 25 21 6 MIN. QFE PRESSURE IN HPA 1010.0 1007.8 1004.8 1001.8 1000.0 991.7 991.1 992.6 997.7 1003.5 1011.2 1012.5 991.1 DAY 29 7 1 22 29 30 1 12 1 1 10 21 MEAN QNH PRESSURE IN HPA 1018.4 1016.0 1013.9 1009.4 1005.4 998.9 994.8 997.0 1002.5 1009.6 1014.7 1017.8 1008.2 MAX. QNH PRESSURE IN HPA 1025.1 1021.2 1020.8 1016.5 1010.5 1004.2 998.1 1000.0 1007.2 1015.4 1018.1 1022.5 1025.1 DAY 14 2 21 2 2 5 19 25 25 25 21 6 MIN. QNH PRESSURE IN HPA 1010.6 1008.4 1005.4 1002.4 1000.6 992.3 991.7 993.2 998.3 1004.1 1011.8 1013.1 991.7 DAY 29 7 1 22 29 30 1 12 1 1 10 21 MEAN QFF PRESSURE IN HPA 1018.7 1016.3 1014.2 1009.7 1005.6 999.1 995.1 997.2 1002.8 1009.9 1015.0 1018.1 1008.5 MAX. QFF PRESSURE IN HPA 1025.5 1021.5 1021.1 1016.8 1010.8 1004.5 998.4 1000.3 1007.5 1015.7 1018.4 1022.8 1025.5 DAY 14 2 21 2 2 5 19 25 25 25 21 6 MIN. QFF PRESSURE IN HPA 1010.9 1008.7 1005.7 1002.7 1000.9 992.6 991.9 993.4 998.6 1004.4 1012.1 1013.4 991.9 DAY 29 7 1 22 29 30 2 12 1 1 10 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1016.3 1014.4 1009.9 1005.7 999.1 995.3 997.3 1002.9 1010.0 1014.9 1017.8 1008.5 MAX. QFE PRESSURE IN HPA 1025.1 1021.4 1021.3 1016.8 1011.2 1004.2 998.6 1001.5 1007.3 1015.7 1017.5 1022.6 1025.1 DAY 14 2 21 1 2 5 22 25 26 25 21 6 MIN. QFE PRESSURE IN HPA 1011.7 1008.9 1006.4 1003.0 1000.0 992.5 992.1 993.3 998.1 1004.8 1011.5 1012.8 992.1 DAY 29 7 17 22 28 30 1 12 1 1 10 23 MEAN QNH PRESSURE IN HPA 1019.1 1017.0 1015.1 1010.5 1006.4 999.8 996.0 997.9 1003.6 1010.6 1015.5 1018.5 1009.2 MAX. QNH PRESSURE IN HPA 1025.7 1022.0 1021.9 1017.4 1011.8 1004.8 999.2 1002.1 1007.9 1016.3 1018.1 1023.2 1025.7 DAY 14 2 21 1 2 5 22 25 26 25 21 6 MIN. QNH PRESSURE IN HPA 1012.3 1009.5 1007.0 1003.6 1000.6 993.1 992.7 993.9 998.7 1005.4 1012.1 1013.4 992.7 DAY 29 7 17 22 28 30 1 12 1 1 10 23 MEAN QFF PRESSURE IN HPA 1019.4 1017.3 1015.3 1010.8 1006.6 1000.0 996.2 998.2 1003.8 1010.9 1015.8 1018.8 1009.4 MAX. QFF PRESSURE IN HPA 1026.1 1022.3 1022.2 1017.7 1012.1 1005.0 999.4 1002.4 1008.2 1016.6 1018.4 1023.5 1026.1 DAY 14 2 21 1 2 5 22 25 26 25 21 6 MIN. QFF PRESSURE IN HPA 1012.6 1009.8 1007.3 1003.9 1000.9 993.3 992.9 994.1 999.0 1005.7 1012.4 1013.7 992.9 DAY 29 7 17 22 28 30 1 12 1 9 10 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1018.2 1016.4 1014.5 1009.8 1005.8 999.2 995.5 997.4 1002.8 1010.0 1014.9 1017.8 1008.5 MAX. QFE PRESSURE IN HPA 1024.7 1021.2 1021.3 1016.8 1010.8 1003.9 998.4 1002.9 1007.3 1015.7 1017.8 1022.5 1024.7 DAY 14 2 21 1 2 1 19 25 26 25 26 5 MIN. QFE PRESSURE IN HPA 1012.1 1008.1 1006.4 1003.1 1000.0 992.7 992.4 993.3 998.1 1004.8 1011.5 1013.1 992.4 DAY 12 28 17 20 28 30 1 12 1 1 10 20 MEAN QNH PRESSURE IN HPA 1018.9 1017.0 1015.1 1010.5 1006.4 999.9 996.1 998.0 1003.4 1010.6 1015.5 1018.4 1009.2 MAX. QNH PRESSURE IN HPA 1025.3 1021.8 1021.9 1017.4 1011.4 1004.5 999.0 1003.5 1007.9 1016.3 1018.4 1023.1 1025.3 DAY 14 2 21 1 2 1 19 25 26 25 26 5 MIN. QNH PRESSURE IN HPA 1012.7 1008.7 1007.0 1003.7 1000.6 993.3 993.0 993.9 998.7 1005.4 1012.1 1013.7 993.0 DAY 12 28 17 20 28 30 1 12 1 1 10 20 MEAN QFF PRESSURE IN HPA 1019.2 1017.3 1015.4 1010.7 1006.7 1000.1 996.4 998.2 1003.7 1010.9 1015.8 1018.7 1009.4 MAX. QFF PRESSURE IN HPA 1025.7 1022.1 1022.2 1017.7 1011.7 1004.8 999.2 1003.7 1008.2 1016.6 1018.7 1023.4 1025.7 DAY 14 2 21 1 2 1 19 25 26 25 26 6 MIN. QFF PRESSURE IN HPA 1013.0 1009.0 1007.3 1004.0 1000.8 993.5 993.2 994.1 998.9 1005.7 1012.4 1014.0 993.2 DAY 12 28 17 20 28 30 1 12 1 1 10 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.5 14.4 17.7 24.9 31.5 35.8 36.8 37.5 32.8 27.6 17.4 12.2 25.1 MINIMUN AIR TEMPERATURE (C) 8.0 8.8 10.8 16.0 20.0 23.8 26.1 26.8 21.3 18.2 9.5 6.3 16.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 5 11 29 31 31 18 7 1 0 133 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 2 1 3 TEMPERATURE RECORDS LOWEST(C) 3.0 1.0 6.4 10.6 14.0 19.0 22.4 22.0 15.2 12.0 -1.6 0.0 -1.6 DAY 23 22 15 9 2 7 2 1 26 14 30 6 MAXIMUM AIR TEMPERATURE (C) 18.4 20.5 24.7 33.3 41.5 46.0 46.3 47.6 43.7 37.6 26.6 19.4 33.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 25 31 30 31 31 30 30 5 0 215 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 26.0 35.2 40.0 50.2 48.2 50.4 51.0 49.2 43.2 33.0 27.4 51.0 DAY 3 28 31 26 30 3 9 8 3 3 6 9 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 11.7 13.9 17.3 21.5 22.2 20.2 20.8 22.4 19.4 17.1 13.1 17.5 MEAN DAILY TEMP. (MDT) (C) 13.2 14.7 17.7 24.7 30.7 34.9 36.2 37.2 32.5 27.9 18.0 12.8 25.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 5.6 114.2 302.2 416.6 470.3 503.1 346.0 212.6 15.8 0.0 2386.4 HEATING DEG. DAYS(BASE 18 0C) 148.2 95.4 30.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 37.1 160.5 472.1 DEWPOINT (MEAN C) 8.4 9.4 8.2 8.4 8.1 9.8 12.2 13.3 8.5 8.3 5.4 7.5 9.0 MIXING RATIO (G/KG) 7.03 7.45 7.00 7.13 7.01 7.81 9.46 10.11 7.37 6.98 5.85 6.60 7.48 VAPOUR PRESSURE (HPA) 11.35 12.02 11.24 11.43 11.18 12.39 14.87 15.92 11.73 11.19 9.45 10.70 11.96 SATURATION DEF. (HPA) 3.58 4.95 9.93 22.17 39.12 50.63 50.69 52.46 42.34 28.41 12.04 4.16 26.71 RELATIVE HUMIDITY (MEAN %) 79 75 59 40 28 24 26 27 26 33 49 77 45 RELATIVE HUMIDITY (MAX. %) 94 93 82 65 49 42 45 44 44 53 69 93 64 RELATIVE HUMIDITY (MIN. %) 57 49 33 18 12 11 13 13 12 16 27 52 26 RELATIVE HUMIDITY (MEAN% 03UTC) 89 90 77 60 45 39 42 44 43 51 66 91 61 RELATIVE HUMIDITY (MEAN% 09UTC) 70 58 40 23 13 13 16 18 16 22 33 67 32 RELATIVE HUMIDITY (MEAN% 15UTC) 74 67 51 32 19 15 16 19 16 25 39 68 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 55.4 61.5 12.3 2.2 0.2 0.0 0.0 0.0 0.0 1.4 3.1 36.2 172.3 DAYS WITH PRECIPITATION >=10 2 3 0 0 0 0 0 0 0 0 0 1 6 DAYS WITH PRECIPITATION >= 5 4 3 2 0 0 0 0 0 0 0 0 2 11 DAYS WITH PRECIPITATION >= 1 8 6 2 1 0 0 0 0 0 1 2 5 25 DAYS WITH PRECIPITATION 9 6 5 3 1 0 0 0 0 1 4 6 35 GREATEST DAILY PRECIPITATION 15.0 25.0 6.2 2.0 0.2 0.0 0.0 0.0 0.0 1.4 1.2 23.1 25.0 DAY 9 5 4 2 10 ** ** ** ** 27 7 11 DAY WITH THUNDER STORM 3 1 4 3 1 0 0 0 0 1 2 0 15 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 0 2 2 9 5 8 4 6 1 0 0 38 WIND DIRECTION (PREVAILING) 270 270 90 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 6.4 6.7 9.0 8.4 9.7 9.7 9.9 8.2 10.9 8.4 7.6 7.0 8.7 PREVAILING WIND PERCENT 31.9 32.1 19.4 31.3 41.9 40.0 53.2 23.4 47.9 23.4 37.9 33.9 34.6 CALMS PERCENT OF WIND 18.1 12.9 14.1 12.5 5.6 5.4 3.2 12.1 8.3 18.5 16.7 25.8 12.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 295 289 130 274 275 274 260 256 284 294 275 292 275 VECTOR WIND MAGNITUDE(KNOTS) 1.1 0.8 0.4 2.5 5.3 5.8 5.9 2.0 6.2 1.8 3.0 2.5 3.0 WIND STEADINESES (MEAN %) 19.3 12.9 5.5 36.2 67.1 68.2 64.8 30.8 71.3 31.6 50.0 53.2 43.5 WIND SPEED (MEAN KNOTS) 5.7 6.2 7.3 6.9 7.9 8.5 9.1 6.5 8.7 5.7 6.0 4.7 6.9 FASTEST WIND DIRECTION 130 280 130 70 270 300 270 330 270 180 310 90 270 FASTEST WIND SPEED (KNOTS) 23 25 29 23 23 23 29 27 35 25 19 29 35 DAY 9 21 20 1 21 16 10 8 6 30 8 11 DAYS WITH SKY CLEAR (0-2)/8 12 14 14 14 24 30 29 27 30 27 15 15 251 DAYS WITH P.CLOUDY (3-6)/8 13 7 11 13 7 0 1 4 0 3 13 10 82 DAYS WITH CLOUDY (7-8)/8 6 7 6 3 0 0 0 0 0 1 2 6 31 DAYS WITH VISIBILITY =< 2 KM 14 6 0 0 3 1 3 2 1 1 0 13 44 DURATION OF SUNSHINE HOURS 155.8 186.2 230.8 261.6 335.4 363.7 331.6 339.6 327.0 279.2 232.6 171.0 3214.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.8 1016.0 1011.7 1009.6 1004.1 999.1 994.7 996.9 1002.4 1009.4 1015.6 1019.6 1008.0 MAX. QFE PRESSURE IN HPA 1023.5 1022.8 1020.6 1016.6 1013.1 1005.4 1000.4 1004.0 1010.3 1015.0 1023.4 1025.3 1025.3 DAY-HOUR 22- 6 22- 6 18- 6 11- 6 1- 6 6- 6 1- 6 19- 6 30- 6 27- 6 29- 6 3- 6 MIN. QFE PRESSURE IN HPA 1007.1 1005.9 1000.8 1001.4 999.2 992.0 988.2 991.6 997.8 1003.2 1006.0 1014.3 988.2 DAY-HOUR 9- 3 5-18 2- 3 7-21 30-15 24-15 12-15 7-15 6-15 8-15 1- 0 31-12 MEAN QNH PRESSURE IN HPA 1017.5 1016.6 1012.4 1010.2 1004.7 999.7 995.3 997.6 1003.0 1010.0 1016.3 1020.2 1008.6 MAX. QNH PRESSURE IN HPA 1024.1 1023.4 1021.2 1017.2 1013.7 1006.0 1001.0 1004.6 1010.9 1015.6 1024.0 1025.9 1025.9 DAY-HOUR 22- 6 22- 6 18- 6 11- 6 1- 6 6- 6 1- 6 19- 6 30- 6 27- 6 29- 6 3- 6 MIN. QNH PRESSURE IN HPA 1007.7 1006.5 1001.4 1002.0 999.8 992.6 988.8 992.2 998.4 1003.8 1006.6 1014.9 988.8 DAY-HOUR 9- 3 5-18 2- 3 7-21 30-15 24-15 12-15 7-15 6-15 8-15 1- 0 31-12 MEAN QFF PRESSURE IN HPA 1017.8 1016.9 1012.6 1010.5 1004.9 999.9 995.5 997.8 1003.3 1010.3 1016.6 1020.5 1008.9 MAX. QFF PRESSURE IN HPA 1024.5 1023.8 1021.5 1017.5 1014.0 1006.3 1001.3 1004.9 1011.2 1015.9 1024.4 1026.3 1026.3 DAY-HOUR 22- 6 22- 6 18- 6 11- 6 1- 9 6- 6 1- 6 19- 6 30- 6 27- 6 29- 6 3- 6 MIN. QFF PRESSURE IN HPA 1008.0 1006.8 1001.7 1002.3 1000.1 992.8 989.0 992.4 998.7 1004.1 1006.9 1015.2 989.0 DAY-HOUR 9- 3 5-18 2- 3 7-21 30-15 24-15 12-15 7-15 6-15 8-15 1- 0 31-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1016.5 1015.7 1011.2 1009.2 1003.9 998.7 994.4 996.6 1002.0 1008.9 1015.2 1019.4 1007.6 MAX. QFE PRESSURE IN HPA 1022.1 1021.6 1018.0 1014.0 1012.1 1003.9 999.4 1002.2 1008.2 1013.2 1021.1 1022.4 1022.4 DAY 22 22 18 10 2 6 1 19 30 29 29 3 MIN. QFE PRESSURE IN HPA 1008.9 1007.1 1001.3 1002.4 999.6 992.6 988.8 992.0 998.3 1003.9 1006.0 1014.7 988.8 DAY 9 6 2 8 30 24 13 7 7 9 1 27 MEAN QNH PRESSURE IN HPA 1017.1 1016.3 1011.8 1009.8 1004.5 999.3 995.0 997.2 1002.6 1009.5 1015.9 1020.0 1008.3 MAX. QNH PRESSURE IN HPA 1022.7 1022.2 1018.6 1014.6 1012.7 1004.5 1000.0 1002.8 1008.8 1013.8 1021.7 1023.0 1023.0 DAY 22 22 18 10 2 6 1 19 30 29 29 3 MIN. QNH PRESSURE IN HPA 1009.5 1007.7 1001.9 1003.0 1000.2 993.2 989.4 992.6 998.9 1004.5 1006.6 1015.3 989.4 DAY 9 6 2 8 30 24 13 7 7 9 1 27 MEAN QFF PRESSURE IN HPA 1017.4 1016.6 1012.1 1010.0 1004.7 999.6 995.2 997.5 1002.9 1009.8 1016.2 1020.3 1008.5 MAX. QFF PRESSURE IN HPA 1023.1 1022.6 1018.9 1014.9 1013.0 1004.8 1000.3 1003.0 1009.1 1014.1 1022.0 1023.4 1023.4 DAY 22 22 18 10 2 6 1 19 30 29 29 3 MIN. QFF PRESSURE IN HPA 1009.8 1008.0 1002.2 1003.3 1000.5 993.4 989.6 992.8 999.1 1004.8 1006.9 1015.6 989.6 DAY 9 6 2 8 30 24 13 7 7 9 1 27 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1016.7 1016.0 1011.5 1009.9 1004.6 999.6 995.1 997.5 1002.7 1009.7 1015.6 1019.6 1008.2 MAX. QFE PRESSURE IN HPA 1022.4 1021.6 1018.2 1015.7 1012.0 1005.0 999.9 1002.9 1009.1 1013.4 1021.8 1023.6 1023.6 DAY 22 22 18 11 1 6 1 19 30 29 29 3 MIN. QFE PRESSURE IN HPA 1007.1 1009.1 1000.8 1004.5 1000.5 993.1 989.6 993.2 998.8 1005.5 1006.0 1015.4 989.6 DAY 9 6 2 27 30 24 12 7 7 9 1 27 MEAN QNH PRESSURE IN HPA 1017.3 1016.7 1012.2 1010.5 1005.3 1000.3 995.8 998.1 1003.3 1010.3 1016.3 1020.3 1008.9 MAX. QNH PRESSURE IN HPA 1023.0 1022.2 1018.8 1016.3 1012.6 1005.6 1000.5 1003.5 1009.7 1014.0 1022.4 1024.2 1024.2 DAY 22 22 18 11 1 6 1 19 30 29 29 3 MIN. QNH PRESSURE IN HPA 1007.7 1009.7 1001.4 1005.1 1001.1 993.7 990.2 993.8 999.4 1006.1 1006.6 1016.0 990.2 DAY 9 6 2 27 30 24 12 7 7 9 1 27 MEAN QFF PRESSURE IN HPA 1017.6 1017.0 1012.5 1010.8 1005.5 1000.5 996.0 998.3 1003.6 1010.6 1016.5 1020.6 1009.1 MAX. QFF PRESSURE IN HPA 1023.4 1022.6 1019.1 1016.6 1012.9 1005.9 1000.8 1003.8 1010.0 1014.3 1022.8 1024.6 1024.6 DAY 22 22 18 11 1 6 1 19 30 29 29 3 MIN. QFF PRESSURE IN HPA 1008.0 1010.0 1001.7 1005.4 1001.4 993.9 990.4 994.0 999.7 1006.4 1006.9 1016.3 990.4 DAY 9 6 2 27 30 24 12 7 7 9 1 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.1 1017.4 1013.0 1011.0 1005.6 1000.4 995.9 998.5 1003.8 1011.2 1017.2 1021.1 1009.4 MAX. QFE PRESSURE IN HPA 1023.5 1022.8 1020.6 1016.6 1013.1 1005.4 1000.4 1004.0 1010.3 1015.0 1023.4 1025.3 1025.3 DAY 22 22 18 11 1 6 1 19 30 27 29 3 MIN. QFE PRESSURE IN HPA 1009.8 1010.8 1001.7 1005.6 1001.5 994.3 990.8 993.5 1000.0 1006.5 1009.2 1016.7 990.8 DAY 9 20 2 27 20 24 12 7 7 8 1 27 MEAN QNH PRESSURE IN HPA 1018.7 1018.0 1013.6 1011.7 1006.2 1001.0 996.5 999.1 1004.5 1011.8 1017.8 1021.7 1010.1 MAX. QNH PRESSURE IN HPA 1024.1 1023.4 1021.2 1017.2 1013.7 1006.0 1001.0 1004.6 1010.9 1015.6 1024.0 1025.9 1025.9 DAY 22 22 18 11 1 6 1 19 30 27 29 3 MIN. QNH PRESSURE IN HPA 1010.4 1011.4 1002.3 1006.2 1002.1 994.9 991.4 994.1 1000.6 1007.1 1009.8 1017.3 991.4 DAY 9 20 2 27 20 24 12 7 7 8 1 27 MEAN QFF PRESSURE IN HPA 1019.0 1018.3 1013.9 1011.9 1006.4 1001.3 996.8 999.3 1004.7 1012.1 1018.1 1022.0 1010.3 MAX. QFF PRESSURE IN HPA 1024.5 1023.8 1021.5 1017.5 1014.0 1006.3 1001.3 1004.9 1011.2 1015.9 1024.4 1026.3 1026.3 DAY 22 22 18 11 1 6 1 19 30 27 29 3 MIN. QFF PRESSURE IN HPA 1010.7 1011.7 1002.6 1006.5 1002.4 995.1 991.6 994.3 1000.9 1007.4 1010.1 1017.6 991.6 DAY 9 20 2 27 20 24 12 7 7 8 1 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1017.0 1012.6 1010.6 1004.8 999.8 995.4 997.8 1003.0 1010.2 1016.1 1020.1 1008.7 MAX. QFE PRESSURE IN HPA 1022.6 1022.4 1019.7 1016.1 1013.1 1005.4 1000.0 1003.1 1009.8 1014.0 1022.2 1024.6 1024.6 DAY 22 22 18 10 1 6 8 18 30 29 29 3 MIN. QFE PRESSURE IN HPA 1010.3 1011.1 1002.4 1005.7 1001.5 993.6 990.3 993.4 999.3 1005.5 1008.7 1015.5 990.3 DAY 9 28 2 26 20 24 12 7 10 8 1 31 MEAN QNH PRESSURE IN HPA 1018.2 1017.6 1013.2 1011.2 1005.5 1000.4 996.1 998.4 1003.6 1010.8 1016.8 1020.7 1009.4 MAX. QNH PRESSURE IN HPA 1023.2 1023.0 1020.3 1016.7 1013.7 1006.0 1000.6 1003.7 1010.4 1014.6 1022.8 1025.2 1025.2 DAY 22 22 18 10 1 6 8 18 30 29 29 3 MIN. QNH PRESSURE IN HPA 1010.9 1011.7 1003.0 1006.3 1002.1 994.2 990.9 994.0 999.9 1006.1 1009.3 1016.1 990.9 DAY 9 28 2 26 20 24 12 7 10 8 1 31 MEAN QFF PRESSURE IN HPA 1018.5 1017.9 1013.5 1011.5 1005.7 1000.6 996.3 998.6 1003.9 1011.1 1017.1 1021.0 1009.6 MAX. QFF PRESSURE IN HPA 1023.6 1023.4 1020.6 1017.0 1014.0 1006.3 1000.9 1003.9 1010.7 1014.9 1023.2 1025.6 1025.6 DAY 22 22 18 10 1 6 8 18 30 29 29 3 MIN. QFF PRESSURE IN HPA 1011.2 1012.0 1003.3 1006.6 1002.4 994.4 991.1 994.2 1000.1 1006.4 1009.6 1016.4 991.1 DAY 9 28 2 26 20 24 12 7 10 8 1 31 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.9 1015.0 1011.0 1009.0 1003.2 998.5 993.9 996.1 1001.5 1008.6 1014.6 1018.6 1007.2 MAX. QFE PRESSURE IN HPA 1021.1 1020.2 1017.7 1014.9 1011.5 1003.9 998.4 1001.5 1008.1 1013.0 1020.4 1022.9 1022.9 DAY 10 22 18 10 1 6 8 18 30 29 29 3 MIN. QFE PRESSURE IN HPA 1010.0 1008.3 1001.4 1003.7 999.8 992.4 988.6 991.8 998.0 1003.5 1008.2 1014.3 988.6 DAY 7 5 2 7 17 24 12 7 7 8 11 31 MEAN QNH PRESSURE IN HPA 1016.5 1015.6 1011.6 1009.6 1003.9 999.1 994.6 996.7 1002.1 1009.2 1015.2 1019.3 1007.8 MAX. QNH PRESSURE IN HPA 1021.7 1020.8 1018.3 1015.5 1012.1 1004.5 999.0 1002.1 1008.7 1013.6 1021.0 1023.5 1023.5 DAY 10 22 18 10 1 6 8 18 30 29 29 3 MIN. QNH PRESSURE IN HPA 1010.6 1008.9 1002.0 1004.3 1000.4 993.0 989.2 992.4 998.6 1004.1 1008.8 1014.9 989.2 DAY 7 5 2 7 17 24 12 7 7 8 11 31 MEAN QFF PRESSURE IN HPA 1016.8 1015.9 1011.9 1009.9 1004.1 999.4 994.8 996.9 1002.4 1009.5 1015.5 1019.6 1008.0 MAX. QFF PRESSURE IN HPA 1022.0 1021.2 1018.6 1015.8 1012.4 1004.8 999.3 1002.3 1009.0 1013.9 1021.4 1023.9 1023.9 DAY 10 22 18 10 1 6 8 18 30 29 29 3 MIN. QFF PRESSURE IN HPA 1010.9 1009.2 1002.3 1004.6 1000.7 993.2 989.4 992.6 998.8 1004.4 1009.1 1015.2 989.4 DAY 7 5 2 26 17 24 12 7 7 8 11 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.2 1014.9 1010.9 1008.3 1002.7 997.9 993.4 995.6 1001.4 1008.5 1014.9 1018.9 1007.0 MAX. QFE PRESSURE IN HPA 1021.5 1019.7 1017.3 1013.8 1011.0 1003.5 997.3 1000.7 1007.7 1012.7 1021.1 1022.9 1022.9 DAY 10 22 18 10 1 6 8 18 30 29 15 3 MIN. QFE PRESSURE IN HPA 1009.9 1007.7 1003.4 1002.0 999.2 992.0 988.2 991.6 997.8 1003.2 1009.0 1014.7 988.2 DAY 17 5 2 7 30 24 12 7 6 8 11 31 MEAN QNH PRESSURE IN HPA 1016.8 1015.6 1011.6 1008.9 1003.3 998.5 994.0 996.2 1002.0 1009.1 1015.6 1019.6 1007.6 MAX. QNH PRESSURE IN HPA 1022.1 1020.3 1017.9 1014.4 1011.6 1004.1 997.9 1001.3 1008.3 1013.3 1021.7 1023.5 1023.5 DAY 10 22 18 10 1 6 8 18 30 29 15 3 MIN. QNH PRESSURE IN HPA 1010.5 1008.3 1004.0 1002.6 999.8 992.6 988.8 992.2 998.4 1003.8 1009.6 1015.3 988.8 DAY 17 5 2 7 30 24 12 7 6 8 11 31 MEAN QFF PRESSURE IN HPA 1017.1 1015.9 1011.8 1009.2 1003.5 998.7 994.2 996.4 1002.2 1009.4 1015.9 1019.9 1007.8 MAX. QFF PRESSURE IN HPA 1022.4 1020.7 1018.2 1014.7 1011.9 1004.4 998.2 1001.5 1008.6 1013.6 1022.0 1023.9 1023.9 DAY 10 22 18 10 1 6 8 18 30 29 15 3 MIN. QFF PRESSURE IN HPA 1010.8 1008.6 1004.3 1002.9 1000.1 992.8 989.0 992.4 998.7 1004.1 1009.9 1015.6 989.0 DAY 17 5 2 7 30 24 12 7 6 8 11 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1015.9 1011.9 1009.4 1003.8 998.9 994.5 996.8 1002.6 1009.2 1015.8 1019.6 1008.0 MAX. QFE PRESSURE IN HPA 1022.3 1021.7 1018.3 1015.4 1012.1 1004.2 998.3 1002.4 1008.9 1013.2 1021.1 1023.2 1023.2 DAY 10 21 17 10 1 6 8 18 30 28 15 28 MIN. QFE PRESSURE IN HPA 1010.6 1005.9 1005.1 1002.0 1000.2 993.5 988.5 992.6 998.8 1004.1 1010.7 1015.3 988.5 DAY 17 5 1 7 17 23 12 13 6 8 7 31 MEAN QNH PRESSURE IN HPA 1017.7 1016.5 1012.6 1010.0 1004.5 999.6 995.1 997.4 1003.2 1009.9 1016.4 1020.2 1008.6 MAX. QNH PRESSURE IN HPA 1022.9 1022.3 1018.9 1016.0 1012.7 1004.8 998.9 1003.0 1009.5 1013.8 1021.7 1023.8 1023.8 DAY 10 21 17 10 1 6 8 18 30 28 15 28 MIN. QNH PRESSURE IN HPA 1011.2 1006.5 1005.7 1002.6 1000.8 994.1 989.1 993.2 999.4 1004.7 1011.3 1015.9 989.1 DAY 17 5 1 7 17 23 12 13 6 8 7 31 MEAN QFF PRESSURE IN HPA 1018.0 1016.8 1012.8 1010.3 1004.7 999.8 995.3 997.6 1003.5 1010.1 1016.7 1020.6 1008.9 MAX. QFF PRESSURE IN HPA 1023.2 1022.7 1019.2 1016.3 1013.0 1005.1 999.1 1003.2 1009.8 1014.1 1022.0 1024.2 1024.2 DAY 10 21 17 10 1 6 8 18 30 28 15 28 MIN. QFF PRESSURE IN HPA 1011.5 1006.8 1006.0 1002.9 1001.1 994.4 989.3 993.4 999.7 1005.0 1011.6 1016.3 989.3 DAY 17 5 1 7 17 23 12 13 6 8 7 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1016.9 1015.9 1011.9 1009.6 1004.1 999.1 994.7 996.9 1002.5 1009.1 1015.8 1019.4 1008.0 MAX. QFE PRESSURE IN HPA 1022.3 1022.1 1018.3 1015.8 1011.6 1004.2 998.7 1002.6 1008.3 1013.2 1021.1 1022.9 1022.9 DAY 10 21 17 10 1 6 31 18 30 28 15 3 MIN. QFE PRESSURE IN HPA 1009.6 1007.3 1003.1 1001.4 1000.2 993.4 988.5 992.6 998.3 1004.1 1010.0 1014.8 988.5 DAY 17 5 1 7 17 23 12 13 6 8 7 9 MEAN QNH PRESSURE IN HPA 1017.5 1016.5 1012.6 1010.2 1004.7 999.7 995.3 997.5 1003.1 1009.7 1016.5 1020.1 1008.6 MAX. QNH PRESSURE IN HPA 1022.9 1022.7 1018.9 1016.4 1012.2 1004.8 999.3 1003.2 1008.9 1013.8 1021.7 1023.5 1023.5 DAY 10 21 17 10 1 6 31 18 30 28 15 3 MIN. QNH PRESSURE IN HPA 1010.2 1007.9 1003.7 1002.0 1000.8 994.0 989.1 993.2 998.9 1004.7 1010.6 1015.4 989.1 DAY 17 5 1 7 17 23 12 13 6 8 7 9 MEAN QFF PRESSURE IN HPA 1017.8 1016.8 1012.8 1010.5 1004.9 999.9 995.5 997.7 1003.3 1010.0 1016.7 1020.4 1008.9 MAX. QFF PRESSURE IN HPA 1023.3 1023.1 1019.2 1016.7 1012.5 1005.1 999.5 1003.4 1009.2 1014.1 1022.0 1023.9 1023.9 DAY 10 21 17 10 1 6 31 18 30 28 28 3 MIN. QFF PRESSURE IN HPA 1010.5 1008.2 1004.0 1002.3 1001.1 994.2 989.3 993.4 999.1 1005.0 1010.9 1015.7 989.3 DAY 17 5 1 7 17 23 12 13 6 8 7 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.7 12.3 16.8 26.9 31.6 34.6 38.6 38.0 31.4 25.3 17.6 12.5 24.7 MINIMUN AIR TEMPERATURE (C) 5.4 5.4 8.1 18.0 20.7 23.2 28.9 27.0 20.5 16.6 10.9 9.2 16.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 8 14 27 31 30 11 5 0 0 126 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 2 1 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS LOWEST(C) -1.0 0.0 2.0 11.0 14.4 19.0 24.0 20.0 16.4 8.4 5.6 1.4 -1.0 DAY 15 5 1 12 12 15 6 31 3 29 12 29 MAXIMUM AIR TEMPERATURE (C) 17.1 19.8 25.3 35.7 41.0 45.2 47.9 48.6 42.0 34.5 24.8 16.6 33.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 4 30 31 30 31 31 30 30 1 0 218 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 26.0 30.6 39.6 45.6 51.8 51.0 50.6 44.0 39.4 31.6 23.0 51.8 DAY 1 25 20 14 31 30 9 26 8 11 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 14.4 17.2 17.7 20.3 22.0 19.0 21.6 21.5 17.9 13.9 7.4 17.0 MEAN DAILY TEMP. (MDT) (C) 11.2 12.6 16.7 26.8 30.8 34.2 38.4 37.8 31.3 25.5 17.9 12.9 24.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 6.1 174.7 305.2 396.1 538.7 519.6 308.5 144.3 2.8 0.0 2396.0 HEATING DEG. DAYS(BASE 18 0C) 209.3 158.9 71.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22.2 161.0 623.0 DEWPOINT (MEAN C) 6.0 4.5 3.8 8.5 6.3 5.6 11.3 10.8 5.9 5.8 7.0 10.4 7.1 MIXING RATIO (G/KG) 5.93 5.37 5.19 7.24 6.26 5.96 9.03 8.89 6.09 5.99 6.45 7.92 6.69 VAPOUR PRESSURE (HPA) 9.59 8.69 8.38 11.60 10.00 9.47 14.21 14.01 9.72 9.63 10.42 12.79 10.71 SATURATION DEF. (HPA) 3.85 6.42 12.23 25.93 39.69 49.79 57.84 56.86 39.71 24.63 10.50 2.09 27.46 RELATIVE HUMIDITY (MEAN %) 75 63 47 35 24 20 23 23 24 32 54 88 42 RELATIVE HUMIDITY (MAX. %) 93 87 72 58 43 36 37 41 42 52 73 98 61 RELATIVE HUMIDITY (MIN. %) 48 35 21 17 11 8 11 10 10 16 35 72 25 RELATIVE HUMIDITY (MEAN% 03UTC) 88 83 67 52 41 34 35 38 41 47 69 94 57 RELATIVE HUMIDITY (MEAN% 09UTC) 62 47 27 20 12 9 14 15 14 22 41 85 31 RELATIVE HUMIDITY (MEAN% 15UTC) 66 49 35 29 15 11 15 13 13 23 49 85 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 52.7 14.5 1.8 1.0 0.2 0.0 0.0 0.0 0.0 1.0 20.5 114.5 206.2 DAYS WITH PRECIPITATION >=10 3 1 0 0 0 0 0 0 0 0 1 2 7 DAYS WITH PRECIPITATION >= 5 3 1 0 0 0 0 0 0 0 0 1 6 11 DAYS WITH PRECIPITATION >= 1 6 2 1 1 0 0 0 0 0 0 2 10 22 DAYS WITH PRECIPITATION 7 5 2 1 1 0 0 0 0 4 5 14 39 GREATEST DAILY PRECIPITATION 17.0 12.0 1.6 1.0 0.2 0.0 0.0 0.0 0.0 0.6 16.0 64.0 64.0 DAY 28 13 23 28 8 ** ** ** ** 27 19 10 DAY WITH THUNDER STORM 1 1 1 2 0 0 0 0 0 1 4 4 14 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 12 9 13 15 19 3 7 3 0 0 82 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.6 7.6 9.4 9.1 9.4 9.2 8.6 9.1 8.2 7.1 5.7 6.8 8.4 PREVAILING WIND PERCENT 34.7 46.1 41.5 34.6 44.0 57.5 25.4 31.0 35.8 26.6 19.2 25.8 35.1 CALMS PERCENT OF WIND 18.1 10.3 8.9 10.0 30.6 16.3 27.4 30.2 37.5 31.0 43.3 13.3 23.1 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 303 287 270 289 281 274 250 284 278 298 293 344 282 VECTOR WIND MAGNITUDE(KNOTS) 1.8 3.4 3.0 3.6 5.3 6.4 1.8 3.2 3.0 1.6 0.8 0.8 2.8 WIND STEADINESES (MEAN %) 29.0 53.1 37.5 50.0 86.9 92.8 34.6 59.3 68.2 34.8 25.8 13.6 48.3 WIND SPEED (MEAN KNOTS) 6.2 6.4 8.0 7.2 6.1 6.9 5.2 5.4 4.4 4.6 3.1 5.9 5.8 FASTEST WIND DIRECTION 60 70 120 300 280 280 280 300 300 20 130 120 120 FASTEST WIND SPEED (KNOTS) 21 25 33 27 31 27 21 29 29 23 19 21 33 DAY 5 24 24 14 8 24 17 29 1 15 30 9 DAYS WITH SKY CLEAR (0-2)/8 17 18 24 8 24 30 26 30 27 23 13 12 252 DAYS WITH P.CLOUDY (3-6)/8 8 7 4 19 6 0 3 1 3 4 12 9 76 DAYS WITH CLOUDY (7-8)/8 6 4 3 3 1 0 0 0 0 4 5 10 36 DAYS WITH VISIBILITY =< 2 KM 11 4 5 2 5 8 9 2 7 0 2 25 80 DURATION OF SUNSHINE HOURS 208.2 232.8 259.4 185.7 331.7 338.9 263.8 336.9 295.7 263.1 194.5 114.0 3024.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.2 1017.0 1013.7 1008.8 1004.6 998.2 995.1 997.1 1003.3 1010.8 1016.5 1018.0 1008.4 MAX. QFE PRESSURE IN HPA 1028.4 1023.2 1022.1 1016.0 1011.7 1003.4 1001.7 1002.5 1010.9 1018.6 1022.3 1026.3 1028.4 DAY-HOUR 30- 6 29- 6 3- 6 2- 6 2- 6 17- 6 30- 6 14- 6 29- 6 29- 6 27- 6 17- 6 MIN. QFE PRESSURE IN HPA 1004.5 1008.1 1000.8 1002.1 999.0 993.6 987.4 991.5 995.6 1006.0 1010.5 1008.0 987.4 DAY-HOUR 28-12 7- 0 23-12 20-15 25-15 23-15 10-15 11- 0 2-12 1-12 1- 0 10-21 MEAN QNH PRESSURE IN HPA 1017.8 1017.6 1014.3 1009.4 1005.2 998.9 995.7 997.8 1003.9 1011.4 1017.1 1018.7 1009.0 MAX. QNH PRESSURE IN HPA 1029.0 1023.8 1022.7 1016.6 1012.3 1004.0 1002.3 1003.1 1011.5 1019.2 1022.9 1026.9 1029.0 DAY-HOUR 30- 6 29- 6 3- 6 2- 6 2- 6 17- 6 30- 6 14- 6 29- 6 29- 6 27- 6 17- 6 MIN. QNH PRESSURE IN HPA 1005.1 1008.7 1001.4 1002.7 999.6 994.2 988.0 992.1 996.2 1006.6 1011.1 1008.6 988.0 DAY-HOUR 28-12 7- 0 23-12 20-15 25-15 23-15 10-15 11- 0 2-12 1-12 1- 0 10-21 MEAN QFF PRESSURE IN HPA 1018.2 1017.9 1014.6 1009.6 1005.4 999.1 995.9 998.0 1004.2 1011.7 1017.4 1019.0 1009.2 MAX. QFF PRESSURE IN HPA 1029.4 1024.1 1023.1 1016.9 1012.6 1004.3 1002.5 1003.3 1011.8 1019.5 1023.2 1027.3 1029.4 DAY-HOUR 30- 6 29- 6 3- 6 2- 6 2- 6 17- 6 30- 6 14- 6 29- 6 29- 6 27- 6 17- 6 MIN. QFF PRESSURE IN HPA 1005.4 1009.0 1001.7 1003.0 999.9 994.5 988.2 992.3 996.5 1006.9 1011.4 1008.9 988.2 DAY-HOUR 28-12 7- 0 23-12 20-15 25-15 23-15 10-15 11- 0 2-12 1-12 1- 0 10-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1016.7 1013.4 1008.2 1004.1 998.0 994.8 996.7 1002.8 1010.3 1016.1 1017.6 1008.0 MAX. QFE PRESSURE IN HPA 1025.8 1021.2 1019.1 1013.7 1009.3 1001.5 1000.2 1001.4 1007.5 1016.6 1020.1 1024.7 1025.8 DAY 30 29 3 12 2 17 31 14 30 29 27 18 MIN. QFE PRESSURE IN HPA 1006.4 1008.1 1001.7 1003.1 999.5 995.4 989.0 991.5 996.5 1006.5 1010.5 1009.6 989.0 DAY 28 7 24 21 31 23 10 11 2 1 1 11 MEAN QNH PRESSURE IN HPA 1017.8 1017.3 1014.1 1008.9 1004.7 998.6 995.4 997.3 1003.4 1010.9 1016.7 1018.3 1008.6 MAX. QNH PRESSURE IN HPA 1026.4 1021.8 1019.7 1014.3 1009.9 1002.1 1000.8 1002.0 1008.1 1017.2 1020.7 1025.3 1026.4 DAY 30 29 3 12 2 17 31 14 30 29 27 18 MIN. QNH PRESSURE IN HPA 1007.0 1008.7 1002.3 1003.7 1000.1 996.0 989.6 992.1 997.1 1007.1 1011.1 1010.2 989.6 DAY 28 7 24 21 31 23 10 11 2 1 1 11 MEAN QFF PRESSURE IN HPA 1018.1 1017.6 1014.3 1009.1 1004.9 998.9 995.6 997.5 1003.6 1011.2 1017.0 1018.6 1008.9 MAX. QFF PRESSURE IN HPA 1026.8 1022.1 1020.0 1014.6 1010.2 1002.4 1001.0 1002.2 1008.4 1017.5 1021.0 1025.6 1026.8 DAY 30 29 3 12 2 17 31 14 30 29 27 18 MIN. QFF PRESSURE IN HPA 1007.3 1009.0 1002.6 1004.0 1000.4 996.2 989.8 992.3 997.4 1007.4 1011.4 1010.5 989.8 DAY 28 7 24 21 31 24 10 11 2 1 1 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.1 1016.8 1013.9 1008.9 1004.9 998.7 995.6 997.6 1003.4 1011.0 1016.5 1017.9 1008.5 MAX. QFE PRESSURE IN HPA 1026.9 1022.2 1019.9 1014.7 1010.7 1002.5 1000.7 1002.0 1009.0 1017.3 1020.6 1024.8 1026.9 DAY 30 29 3 2 2 17 30 14 29 29 27 17 MIN. QFE PRESSURE IN HPA 1006.3 1009.9 1002.0 1002.3 1000.1 995.1 989.6 993.2 997.2 1006.7 1010.9 1010.8 989.6 DAY 28 7 24 21 30 24 10 11 3 1 1 11 MEAN QNH PRESSURE IN HPA 1017.7 1017.4 1014.5 1009.6 1005.6 999.3 996.2 998.2 1004.1 1011.6 1017.1 1018.5 1009.2 MAX. QNH PRESSURE IN HPA 1027.5 1022.8 1020.5 1015.3 1011.3 1003.1 1001.3 1002.6 1009.6 1017.9 1021.2 1025.4 1027.5 DAY 30 29 3 2 2 17 30 14 29 29 27 17 MIN. QNH PRESSURE IN HPA 1006.9 1010.5 1002.6 1002.9 1000.7 995.7 990.2 993.8 997.8 1007.3 1011.5 1011.4 990.2 DAY 28 7 24 21 30 24 10 11 3 1 1 11 MEAN QFF PRESSURE IN HPA 1018.0 1017.8 1014.8 1009.8 1005.8 999.5 996.4 998.5 1004.3 1011.9 1017.4 1018.8 1009.4 MAX. QFF PRESSURE IN HPA 1027.9 1023.1 1020.8 1015.6 1011.6 1003.4 1001.5 1002.8 1009.9 1018.2 1021.5 1025.8 1027.9 DAY 30 29 3 2 2 17 30 14 29 29 27 17 MIN. QFF PRESSURE IN HPA 1007.2 1010.8 1002.9 1003.2 1001.0 996.0 990.4 994.0 998.1 1007.6 1011.8 1011.7 990.4 DAY 28 7 24 21 30 24 10 11 3 1 1 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.6 1018.4 1015.3 1010.5 1006.1 999.5 996.5 998.8 1004.8 1012.5 1017.9 1019.4 1009.8 MAX. QFE PRESSURE IN HPA 1028.4 1023.2 1022.1 1016.0 1011.7 1003.4 1001.7 1002.5 1010.9 1018.6 1022.3 1026.3 1028.4 DAY 30 29 3 2 2 17 30 14 29 29 27 17 MIN. QFE PRESSURE IN HPA 1007.2 1012.7 1004.0 1004.1 1001.5 996.5 989.8 994.7 998.2 1007.7 1012.3 1012.1 989.8 DAY 28 7 24 21 30 23 10 11 2 1 1 10 MEAN QNH PRESSURE IN HPA 1019.2 1019.1 1015.9 1011.1 1006.7 1000.1 997.1 999.4 1005.4 1013.1 1018.6 1020.1 1010.5 MAX. QNH PRESSURE IN HPA 1029.0 1023.8 1022.7 1016.6 1012.3 1004.0 1002.3 1003.1 1011.5 1019.2 1022.9 1026.9 1029.0 DAY 30 29 3 2 2 17 30 14 29 29 27 17 MIN. QNH PRESSURE IN HPA 1007.8 1013.3 1004.6 1004.7 1002.1 997.1 990.4 995.3 998.8 1008.3 1012.9 1012.7 990.4 DAY 28 7 24 21 30 23 10 11 2 1 1 10 MEAN QFF PRESSURE IN HPA 1019.5 1019.4 1016.2 1011.4 1006.9 1000.3 997.3 999.7 1005.6 1013.4 1018.9 1020.4 1010.7 MAX. QFF PRESSURE IN HPA 1029.4 1024.1 1023.1 1016.9 1012.6 1004.3 1002.5 1003.3 1011.8 1019.5 1023.2 1027.3 1029.4 DAY 30 29 3 2 2 17 30 14 29 29 27 17 MIN. QFF PRESSURE IN HPA 1008.1 1013.6 1004.9 1005.0 1002.4 997.4 990.6 995.5 999.1 1008.6 1013.2 1013.0 990.6 DAY 28 7 24 21 30 23 10 11 2 1 1 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1018.0 1014.5 1009.7 1005.4 998.9 995.9 998.0 1004.1 1011.6 1017.1 1018.5 1009.1 MAX. QFE PRESSURE IN HPA 1028.0 1022.9 1022.1 1015.1 1010.3 1002.8 1000.8 1001.6 1009.5 1017.9 1021.6 1025.7 1028.0 DAY 30 10 3 1 2 16 30 14 29 30 11 17 MIN. QFE PRESSURE IN HPA 1005.9 1013.0 1001.0 1004.6 1000.9 996.2 989.2 994.0 997.3 1007.4 1011.8 1011.5 989.2 DAY 28 7 24 21 30 23 10 11 2 1 1 10 MEAN QNH PRESSURE IN HPA 1018.2 1018.7 1015.1 1010.3 1006.0 999.5 996.5 998.6 1004.7 1012.2 1017.8 1019.2 1009.7 MAX. QNH PRESSURE IN HPA 1028.6 1023.5 1022.7 1015.7 1010.9 1003.4 1001.4 1002.2 1010.1 1018.5 1022.2 1026.3 1028.6 DAY 30 10 3 1 2 16 30 14 29 30 11 17 MIN. QNH PRESSURE IN HPA 1006.5 1013.6 1001.6 1005.2 1001.5 996.8 989.8 994.6 997.9 1008.0 1012.4 1012.1 989.8 DAY 28 7 24 21 30 23 10 11 2 1 1 10 MEAN QFF PRESSURE IN HPA 1018.5 1019.0 1015.4 1010.6 1006.2 999.8 996.7 998.9 1005.0 1012.5 1018.0 1019.5 1010.0 MAX. QFF PRESSURE IN HPA 1029.0 1023.9 1023.0 1016.0 1011.2 1003.7 1001.6 1002.4 1010.4 1018.8 1022.5 1026.7 1029.0 DAY 30 10 3 1 2 16 30 14 29 30 11 17 MIN. QFF PRESSURE IN HPA 1006.8 1013.9 1001.9 1005.5 1001.8 997.1 990.0 994.8 998.2 1008.3 1012.7 1012.4 990.0 DAY 28 7 24 21 30 23 10 11 2 1 1 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1016.0 1016.1 1012.6 1008.1 1003.9 997.6 994.4 996.3 1002.5 1009.9 1015.6 1017.2 1007.5 MAX. QFE PRESSURE IN HPA 1026.0 1021.4 1019.9 1013.4 1008.7 1001.3 999.5 999.1 1007.9 1016.1 1019.2 1024.5 1026.0 DAY 30 10 3 1 9 16 30 14 29 28 27 17 MIN. QFE PRESSURE IN HPA 1004.5 1009.7 1000.8 1003.2 999.9 994.3 987.9 991.9 995.6 1006.0 1010.6 1009.2 987.9 DAY 28 6 23 21 25 23 10 11 2 1 1 10 MEAN QNH PRESSURE IN HPA 1016.7 1016.8 1013.2 1008.7 1004.5 998.2 995.0 996.9 1003.1 1010.5 1016.2 1017.9 1008.1 MAX. QNH PRESSURE IN HPA 1026.6 1022.0 1020.5 1014.0 1009.3 1001.9 1000.1 999.7 1008.5 1016.7 1019.8 1025.1 1026.6 DAY 30 10 3 1 9 16 30 14 29 28 27 17 MIN. QNH PRESSURE IN HPA 1005.1 1010.3 1001.4 1003.8 1000.5 994.9 988.5 992.5 996.2 1006.6 1011.2 1009.8 988.5 DAY 28 6 23 21 25 23 10 11 2 1 1 10 MEAN QFF PRESSURE IN HPA 1017.0 1017.1 1013.5 1009.0 1004.7 998.4 995.3 997.1 1003.4 1010.8 1016.5 1018.2 1008.4 MAX. QFF PRESSURE IN HPA 1027.0 1022.3 1020.8 1014.3 1009.6 1002.2 1000.3 999.9 1008.8 1017.0 1020.1 1025.4 1027.0 DAY 30 10 3 1 10 16 30 14 29 28 27 17 MIN. QFF PRESSURE IN HPA 1005.4 1010.6 1001.7 1004.1 1000.8 995.2 988.7 992.7 996.5 1006.9 1011.5 1010.1 988.7 DAY 28 6 23 21 25 23 10 11 2 1 1 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.5 1015.9 1012.5 1007.6 1003.4 997.0 993.7 995.8 1002.2 1009.9 1015.9 1017.7 1007.3 MAX. QFE PRESSURE IN HPA 1026.4 1021.9 1019.5 1012.6 1008.7 1000.4 998.6 998.7 1007.0 1015.7 1019.4 1024.5 1026.4 DAY 30 10 3 11 10 16 30 13 29 28 26 17 MIN. QFE PRESSURE IN HPA 1005.9 1008.7 1001.9 1002.1 999.0 993.6 987.4 991.9 995.9 1006.0 1010.6 1009.2 987.4 DAY 28 6 23 20 25 23 10 11 2 1 6 10 MEAN QNH PRESSURE IN HPA 1017.2 1016.5 1013.2 1008.2 1004.0 997.6 994.3 996.4 1002.8 1010.5 1016.5 1018.4 1008.0 MAX. QNH PRESSURE IN HPA 1027.0 1022.5 1020.1 1013.2 1009.3 1001.0 999.2 999.3 1007.6 1016.3 1020.0 1025.1 1027.0 DAY 30 10 3 11 10 16 30 13 29 28 26 17 MIN. QNH PRESSURE IN HPA 1006.5 1009.3 1002.5 1002.7 999.6 994.2 988.0 992.5 996.5 1006.6 1011.2 1009.8 988.0 DAY 28 6 23 20 25 23 10 11 2 1 6 10 MEAN QFF PRESSURE IN HPA 1017.5 1016.8 1013.5 1008.5 1004.3 997.8 994.5 996.7 1003.1 1010.8 1016.8 1018.7 1008.2 MAX. QFF PRESSURE IN HPA 1027.4 1022.9 1020.4 1013.5 1009.6 1001.3 999.4 999.5 1007.9 1016.6 1020.3 1025.5 1027.4 DAY 30 10 3 11 10 16 30 13 29 28 26 17 MIN. QFF PRESSURE IN HPA 1006.8 1009.6 1002.8 1003.0 999.9 994.5 988.2 992.7 996.8 1006.9 1011.5 1010.1 988.2 DAY 28 6 23 20 25 23 10 11 2 1 6 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1016.9 1013.6 1008.5 1004.4 998.1 994.7 997.0 1003.4 1010.7 1016.6 1018.1 1008.3 MAX. QFE PRESSURE IN HPA 1027.3 1022.7 1020.4 1014.2 1009.6 1001.9 999.3 1000.6 1008.2 1017.1 1020.1 1025.2 1027.3 DAY 30 10 3 11 1 16 30 13 22 28 26 17 MIN. QFE PRESSURE IN HPA 1008.9 1009.0 1001.7 1002.8 999.7 993.9 989.0 993.0 997.4 1006.5 1011.4 1009.2 989.0 DAY 27 6 23 20 30 30 9 11 2 14 6 10 MEAN QNH PRESSURE IN HPA 1018.1 1017.6 1014.2 1009.1 1005.0 998.7 995.3 997.6 1004.0 1011.3 1017.2 1018.7 1008.9 MAX. QNH PRESSURE IN HPA 1027.9 1023.3 1021.0 1014.8 1010.2 1002.5 999.9 1001.2 1008.8 1017.7 1020.7 1025.8 1027.9 DAY 30 10 3 11 1 16 30 13 22 28 26 17 MIN. QNH PRESSURE IN HPA 1009.5 1009.6 1002.3 1003.4 1000.3 994.5 989.6 993.6 998.0 1007.1 1012.0 1009.8 989.6 DAY 27 6 23 20 30 30 9 11 2 14 6 10 MEAN QFF PRESSURE IN HPA 1018.4 1017.9 1014.5 1009.4 1005.3 998.9 995.5 997.8 1004.3 1011.6 1017.5 1019.0 1009.2 MAX. QFF PRESSURE IN HPA 1028.3 1023.7 1021.4 1015.1 1010.5 1002.8 1000.1 1001.4 1009.1 1018.0 1021.0 1026.2 1028.3 DAY 30 10 3 11 1 16 30 13 22 28 26 17 MIN. QFF PRESSURE IN HPA 1009.8 1009.9 1002.6 1003.7 1000.6 994.7 989.8 993.8 998.3 1007.4 1012.3 1010.1 989.8 DAY 27 6 23 20 30 30 9 11 2 14 6 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1017.1 1013.9 1008.6 1004.5 998.3 995.1 997.1 1003.3 1010.7 1016.5 1017.9 1008.4 MAX. QFE PRESSURE IN HPA 1026.5 1022.3 1019.6 1014.4 1010.0 1001.9 1000.1 1001.4 1008.2 1017.1 1020.1 1024.7 1026.5 DAY 30 10 3 11 1 16 30 13 22 28 26 17 MIN. QFE PRESSURE IN HPA 1007.8 1008.6 1001.7 1002.9 1000.1 993.9 989.2 993.0 997.3 1006.9 1011.4 1008.0 989.2 DAY 27 6 23 14 25 30 9 11 1 14 6 10 MEAN QNH PRESSURE IN HPA 1018.1 1017.8 1014.6 1009.3 1005.1 998.9 995.7 997.7 1004.0 1011.3 1017.2 1018.5 1009.0 MAX. QNH PRESSURE IN HPA 1027.1 1022.9 1020.2 1015.0 1010.6 1002.5 1000.7 1002.0 1008.8 1017.7 1020.7 1025.3 1027.1 DAY 30 10 3 11 1 16 30 13 22 28 26 17 MIN. QNH PRESSURE IN HPA 1008.4 1009.2 1002.3 1003.5 1000.7 994.5 989.8 993.6 997.9 1007.5 1012.0 1008.6 989.8 DAY 27 6 23 14 25 30 9 11 1 14 6 10 MEAN QFF PRESSURE IN HPA 1018.4 1018.1 1014.8 1009.5 1005.4 999.1 995.9 997.9 1004.2 1011.6 1017.5 1018.8 1009.3 MAX. QFF PRESSURE IN HPA 1027.5 1023.3 1020.5 1015.3 1010.9 1002.8 1000.9 1002.2 1009.1 1018.0 1021.0 1025.7 1027.5 DAY 30 10 9 11 1 16 30 13 22 28 26 17 MIN. QFF PRESSURE IN HPA 1008.7 1009.5 1002.6 1003.8 1001.0 994.7 990.0 993.8 998.2 1007.8 1012.3 1008.9 990.0 DAY 27 6 23 14 25 30 9 11 1 14 6 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.1 13.7 19.4 25.2 30.9 34.5 37.0 37.5 32.3 27.1 17.1 15.1 25.1 MINIMUN AIR TEMPERATURE (C) 6.1 7.4 12.1 15.8 20.1 22.5 25.9 27.0 21.6 18.1 9.1 10.9 16.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 10 23 31 31 17 9 0 0 122 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 1 0 1 TEMPERATURE RECORDS LOWEST(C) 1.0 1.6 7.4 10.0 15.4 18.2 21.4 22.0 16.6 13.6 0.0 1.2 0.0 DAY 28 1 5 14 9 2 1 17 13 20 21 23 MAXIMUM AIR TEMPERATURE (C) 16.8 20.4 27.1 34.0 40.2 45.0 46.8 47.8 43.3 36.9 26.2 20.1 33.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 4 28 31 30 31 31 30 31 6 0 222 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.6 25.0 34.4 40.2 46.0 49.0 49.4 51.0 47.2 40.2 35.6 24.0 51.0 DAY 18 26 30 25 15 4 25 4 7 1 5 9 DIF. BETWEEN (MAX.-MIN.) (C) 10.7 13.0 15.0 18.2 20.1 22.5 20.9 20.8 21.7 18.8 17.1 9.2 17.3 MEAN DAILY TEMP. (MDT) (C) 11.4 13.9 19.6 24.9 30.2 33.7 36.3 37.4 32.5 27.5 17.7 15.5 25.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 13.3 117.4 283.9 382.3 475.4 508.8 344.5 201.7 18.1 0.0 2345.4 HEATING DEG. DAYS(BASE 18 0C) 203.8 114.6 3.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 62.0 85.1 468.9 DEWPOINT (MEAN C) 7.8 6.9 10.4 7.9 4.6 6.4 9.5 12.6 7.9 7.2 2.4 11.6 7.9 MIXING RATIO (G/KG) 6.65 6.27 8.01 6.87 5.62 6.24 7.72 10.02 6.96 6.72 4.73 8.80 7.05 VAPOUR PRESSURE (HPA) 10.77 10.14 12.87 11.02 8.97 9.90 12.19 15.79 11.10 10.77 7.65 14.18 11.28 SATURATION DEF. (HPA) 2.81 6.12 10.73 22.98 38.97 48.89 54.65 53.11 40.87 27.29 13.82 3.57 26.98 RELATIVE HUMIDITY (MEAN %) 82 67 60 38 23 20 21 27 26 32 41 81 43 RELATIVE HUMIDITY (MAX. %) 96 88 84 65 45 37 36 47 45 51 63 94 63 RELATIVE HUMIDITY (MIN. %) 59 41 33 16 9 8 11 12 10 16 21 62 25 RELATIVE HUMIDITY (MEAN% 03UTC) 93 85 80 62 40 35 36 45 44 49 58 90 60 RELATIVE HUMIDITY (MEAN% 09UTC) 74 51 42 20 11 10 12 19 15 21 26 69 31 RELATIVE HUMIDITY (MEAN% 15UTC) 75 57 49 28 14 12 13 13 16 26 32 78 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 29.4 8.9 10.1 0.1 7.0 0.0 0.0 0.0 0.0 7.5 0.5 88.0 151.5 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 0 3 4 DAYS WITH PRECIPITATION >= 5 2 1 0 0 0 0 0 0 0 1 0 4 8 DAYS WITH PRECIPITATION >= 1 5 3 5 0 2 0 0 0 0 1 0 8 24 DAYS WITH PRECIPITATION 6 5 6 1 2 0 0 0 0 2 1 10 33 GREATEST DAILY PRECIPITATION 13.0 5.0 3.0 0.1 4.0 0.0 0.0 0.0 0.0 7.1 0.5 33.0 33.0 DAY 8 15 15 9 4 ** ** ** ** 27 30 1 DAY WITH THUNDER STORM 1 1 2 0 2 0 0 0 0 2 1 8 17 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 3 0 2 6 3 0 0 2 3 2 1 22 WIND DIRECTION (PREVAILING) 315 270 270 270 270 270 270 270 270 315 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.0 7.7 8.1 9.5 11.0 11.4 11.5 9.3 7.3 6.3 8.0 8.0 9.3 PREVAILING WIND PERCENT 30.2 25.9 23.4 34.2 39.1 60.0 52.4 27.0 34.2 23.4 32.1 20.6 32.4 CALMS PERCENT OF WIND 10.5 9.4 10.5 6.7 3.6 3.3 2.0 4.0 9.2 13.7 10.8 10.9 7.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 310 297 282 281 290 284 273 277 279 296 292 21 286 VECTOR WIND MAGNITUDE(KNOTS) 2.4 0.8 0.7 4.4 6.1 9.0 6.4 1.9 2.4 1.0 2.5 0.6 3.1 WIND STEADINESES (MEAN %) 42.1 12.5 10.3 56.4 64.9 84.9 64.6 26.4 38.1 17.9 38.5 9.5 41.9 WIND SPEED (MEAN KNOTS) 5.7 6.4 6.8 7.8 9.4 10.6 9.9 7.2 6.3 5.6 6.5 6.3 7.4 FASTEST WIND DIRECTION 100 290 120 320 180 300 300 290 300 270 290 290 300 FASTEST WIND SPEED (KNOTS) 19 27 31 27 31 35 27 23 23 25 31 23 35 DAY 23 21 24 17 2 20 16 31 1 1 18 21 DAYS WITH SKY CLEAR (0-2)/8 21 15 20 13 21 30 30 30 28 21 18 10 257 DAYS WITH P.CLOUDY (3-6)/8 7 11 8 15 8 0 1 1 2 9 10 10 82 DAYS WITH CLOUDY (7-8)/8 3 2 3 2 2 0 0 0 0 1 2 11 26 DAYS WITH VISIBILITY =< 2 KM 15 5 1 0 2 1 0 5 4 1 2 5 41 DURATION OF SUNSHINE HOURS 214.3 220.6 263.7 282.5 322.7 375.3 374.3 347.4 307.7 281.0 228.5 147.2 3365.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.6 1016.5 1012.2 1009.5 1003.5 997.2 995.2 998.3 1004.1 1009.9 1016.1 1018.4 1008.3 MAX. QFE PRESSURE IN HPA 1025.7 1021.6 1020.7 1016.5 1009.3 1004.7 999.5 1003.0 1010.9 1016.4 1025.2 1026.7 1026.7 DAY-HOUR 30- 6 1- 6 1- 6 1- 6 5- 6 1- 6 28- 6 15- 6 23- 6 31-21 20- 6 22- 6 MIN. QFE PRESSURE IN HPA 1010.9 1006.5 1000.0 1002.4 996.0 991.4 991.5 993.9 998.7 1003.0 1004.9 1007.3 991.4 DAY-HOUR 3-15 18-12 24-15 25-15 29-15 11-21 18-15 24-15 2-15 1- 0 18- 0 4-15 MEAN QNH PRESSURE IN HPA 1019.2 1017.1 1012.8 1010.1 1004.1 997.8 995.9 998.9 1004.7 1010.5 1016.8 1019.1 1008.9 MAX. QNH PRESSURE IN HPA 1026.3 1022.2 1021.3 1017.1 1009.9 1005.3 1000.1 1003.6 1011.5 1017.0 1025.8 1027.3 1027.3 DAY-HOUR 30- 6 1- 6 1- 6 1- 6 5- 6 1- 6 28- 6 15- 6 23- 6 31-21 20- 6 22- 6 MIN. QNH PRESSURE IN HPA 1011.5 1007.1 1000.6 1003.0 996.6 992.0 992.1 994.5 999.3 1003.6 1005.5 1007.9 992.0 DAY-HOUR 3-15 18-12 24-15 25-15 29-15 11-21 18-15 24-15 2-15 1- 0 18- 0 4-15 MEAN QFF PRESSURE IN HPA 1019.5 1017.4 1013.1 1010.3 1004.4 998.0 996.1 999.1 1004.9 1010.8 1017.1 1019.3 1009.2 MAX. QFF PRESSURE IN HPA 1026.7 1022.6 1021.6 1017.4 1010.2 1005.6 1000.3 1003.8 1011.8 1017.3 1026.2 1027.7 1027.7 DAY-HOUR 30- 6 1- 6 1- 6 1- 6 5- 6 1- 6 28- 6 15- 6 23- 6 31-21 20- 6 22- 6 MIN. QFF PRESSURE IN HPA 1011.8 1007.4 1000.9 1003.3 996.9 992.3 992.3 994.8 999.6 1003.9 1005.8 1008.2 992.3 DAY-HOUR 3-15 18-12 24-15 25-18 29-15 11-21 18-15 24-15 2-15 1- 0 18- 0 4-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1018.3 1016.3 1011.9 1008.9 1003.2 996.9 995.0 997.8 1003.6 1009.3 1016.1 1018.3 1008.0 MAX. QFE PRESSURE IN HPA 1024.1 1020.1 1018.5 1012.8 1007.3 1003.5 997.3 1001.3 1008.7 1013.4 1024.0 1025.5 1025.5 DAY 30 16 1 1 6 1 2 6 23 31 20 23 MIN. QFE PRESSURE IN HPA 1012.1 1007.3 1000.2 1003.9 997.2 992.4 992.5 994.4 999.4 1003.0 1004.9 1009.4 992.4 DAY 19 21 25 26 29 16 17 24 3 1 18 5 MEAN QNH PRESSURE IN HPA 1018.9 1016.9 1012.5 1009.6 1003.8 997.6 995.6 998.4 1004.2 1009.9 1016.7 1018.9 1008.6 MAX. QNH PRESSURE IN HPA 1024.7 1020.7 1019.1 1013.4 1007.9 1004.1 997.9 1001.9 1009.3 1014.0 1024.6 1026.1 1026.1 DAY 30 16 1 1 6 1 2 6 23 31 20 23 MIN. QNH PRESSURE IN HPA 1012.7 1007.9 1000.8 1004.5 997.8 993.0 993.1 995.0 1000.0 1003.6 1005.5 1010.0 993.0 DAY 19 21 25 26 29 16 17 24 3 1 18 5 MEAN QFF PRESSURE IN HPA 1019.2 1017.2 1012.8 1009.8 1004.0 997.8 995.8 998.6 1004.5 1010.2 1017.0 1019.2 1008.9 MAX. QFF PRESSURE IN HPA 1025.1 1021.0 1019.4 1013.7 1008.2 1004.4 998.2 1002.1 1009.6 1014.3 1025.0 1026.5 1026.5 DAY 30 16 1 1 6 1 2 6 23 31 20 23 MIN. QFF PRESSURE IN HPA 1013.0 1008.2 1001.1 1004.8 998.1 993.2 993.3 995.2 1000.3 1003.9 1005.8 1010.3 993.2 DAY 19 21 25 26 29 16 17 24 3 1 18 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1016.5 1012.4 1009.7 1004.0 997.5 995.5 998.8 1004.4 1010.1 1016.4 1018.4 1008.5 MAX. QFE PRESSURE IN HPA 1024.3 1020.1 1019.4 1014.2 1008.4 1004.0 998.7 1002.0 1009.5 1013.7 1024.0 1025.7 1025.7 DAY 30 1 1 1 5 1 28 6 23 20 20 23 MIN. QFE PRESSURE IN HPA 1013.7 1007.5 1002.0 1005.2 998.3 993.2 992.3 995.1 1000.5 1003.7 1005.4 1010.5 992.3 DAY 19 21 25 26 29 16 4 24 2 1 18 5 MEAN QNH PRESSURE IN HPA 1019.1 1017.1 1013.0 1010.4 1004.6 998.2 996.2 999.4 1005.0 1010.7 1017.1 1019.1 1009.1 MAX. QNH PRESSURE IN HPA 1024.9 1020.7 1020.0 1014.8 1009.0 1004.6 999.3 1002.6 1010.1 1014.3 1024.6 1026.3 1026.3 DAY 30 1 1 1 5 1 28 6 23 20 20 23 MIN. QNH PRESSURE IN HPA 1014.3 1008.1 1002.6 1005.8 998.9 993.8 992.9 995.7 1001.1 1004.3 1006.0 1011.1 992.9 DAY 19 21 25 26 29 16 4 24 2 1 18 5 MEAN QFF PRESSURE IN HPA 1019.4 1017.4 1013.3 1010.6 1004.9 998.4 996.4 999.6 1005.3 1011.0 1017.4 1019.4 1009.4 MAX. QFF PRESSURE IN HPA 1025.3 1021.1 1020.3 1015.1 1009.3 1004.9 999.5 1002.8 1010.4 1014.6 1025.0 1026.7 1026.7 DAY 30 1 1 1 5 1 28 6 23 20 20 23 MIN. QFF PRESSURE IN HPA 1014.6 1008.4 1002.9 1006.1 999.2 994.1 993.1 995.9 1001.4 1004.6 1006.3 1011.4 993.1 DAY 19 21 25 26 29 16 4 24 2 1 18 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.8 1017.9 1013.7 1011.0 1004.9 998.4 996.5 1000.0 1005.6 1011.5 1017.7 1019.8 1009.7 MAX. QFE PRESSURE IN HPA 1025.7 1021.6 1020.7 1016.5 1009.3 1004.7 999.5 1003.0 1010.9 1015.8 1025.2 1026.7 1026.7 DAY 30 1 1 1 5 1 28 15 23 20 20 22 MIN. QFE PRESSURE IN HPA 1013.7 1010.1 1003.0 1006.2 998.6 994.4 993.2 996.4 1001.2 1004.4 1007.0 1012.1 993.2 DAY 19 18 25 26 29 16 18 24 2 1 18 5 MEAN QNH PRESSURE IN HPA 1020.5 1018.5 1014.4 1011.7 1005.5 999.0 997.1 1000.6 1006.2 1012.1 1018.4 1020.4 1010.4 MAX. QNH PRESSURE IN HPA 1026.3 1022.2 1021.3 1017.1 1009.9 1005.3 1000.1 1003.6 1011.5 1016.4 1025.8 1027.3 1027.3 DAY 30 1 1 1 5 1 28 15 23 20 20 22 MIN. QNH PRESSURE IN HPA 1014.3 1010.7 1003.6 1006.8 999.2 995.0 993.8 997.0 1001.8 1005.0 1007.6 1012.7 993.8 DAY 19 18 25 26 29 16 18 24 2 1 18 5 MEAN QFF PRESSURE IN HPA 1020.8 1018.8 1014.7 1011.9 1005.7 999.3 997.3 1000.8 1006.5 1012.4 1018.6 1020.7 1010.6 MAX. QFF PRESSURE IN HPA 1026.7 1022.6 1021.6 1017.4 1010.2 1005.6 1000.3 1003.8 1011.8 1016.7 1026.2 1027.7 1027.7 DAY 30 1 1 1 5 1 28 15 23 20 20 22 MIN. QFF PRESSURE IN HPA 1014.6 1011.0 1003.9 1007.1 999.5 995.3 994.0 997.2 1002.1 1005.3 1007.9 1013.0 994.0 DAY 19 18 25 26 29 16 18 24 2 1 18 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.2 1017.4 1013.2 1010.4 1004.2 997.8 996.0 999.3 1004.9 1010.6 1016.5 1018.8 1009.0 MAX. QFE PRESSURE IN HPA 1025.2 1021.1 1019.6 1016.0 1009.1 1004.0 999.2 1002.0 1010.2 1015.2 1024.0 1025.8 1025.8 DAY 30 10 1 1 5 1 7 31 23 20 20 22 MIN. QFE PRESSURE IN HPA 1013.1 1008.4 1002.5 1006.0 998.0 994.1 993.2 995.5 1000.9 1003.6 1006.8 1011.1 993.2 DAY 3 18 25 25 29 16 18 24 2 1 18 4 MEAN QNH PRESSURE IN HPA 1019.9 1018.0 1013.9 1011.0 1004.9 998.5 996.6 999.9 1005.5 1011.2 1017.1 1019.4 1009.7 MAX. QNH PRESSURE IN HPA 1025.8 1021.7 1020.2 1016.6 1009.7 1004.6 999.8 1002.6 1010.8 1015.8 1024.6 1026.4 1026.4 DAY 30 10 1 1 5 1 7 31 23 20 20 22 MIN. QNH PRESSURE IN HPA 1013.7 1009.0 1003.1 1006.6 998.6 994.7 993.8 996.1 1001.5 1004.2 1007.4 1011.7 993.8 DAY 3 18 25 25 29 16 18 24 2 1 18 4 MEAN QFF PRESSURE IN HPA 1020.2 1018.3 1014.1 1011.3 1005.1 998.7 996.8 1000.1 1005.7 1011.4 1017.4 1019.7 1009.9 MAX. QFF PRESSURE IN HPA 1026.2 1022.0 1020.5 1016.9 1010.0 1004.9 1000.1 1002.9 1011.1 1016.1 1025.0 1026.8 1026.8 DAY 30 24 1 1 5 1 7 31 23 20 20 22 MIN. QFF PRESSURE IN HPA 1014.0 1009.3 1003.4 1006.9 998.9 994.9 994.0 996.3 1001.8 1004.5 1007.7 1012.0 994.0 DAY 3 18 25 25 29 16 18 24 2 1 18 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.8 1015.3 1011.4 1008.7 1002.7 996.5 994.6 997.5 1003.1 1009.0 1015.0 1017.4 1007.4 MAX. QFE PRESSURE IN HPA 1023.5 1019.5 1017.7 1014.1 1006.8 1002.5 997.3 1000.3 1007.8 1014.3 1023.0 1024.4 1024.4 DAY 30 24 3 1 6 1 7 31 23 31 20 22 MIN. QFE PRESSURE IN HPA 1012.0 1006.5 1001.7 1003.4 996.3 992.7 992.1 994.5 999.2 1003.3 1005.3 1009.1 992.1 DAY 19 18 25 25 29 16 4 24 2 1 17 4 MEAN QNH PRESSURE IN HPA 1018.4 1015.9 1012.0 1009.3 1003.4 997.1 995.2 998.2 1003.8 1009.6 1015.6 1018.1 1008.0 MAX. QNH PRESSURE IN HPA 1024.1 1020.1 1018.3 1014.7 1007.4 1003.1 997.9 1000.9 1008.4 1014.9 1023.6 1025.0 1025.0 DAY 30 24 3 1 6 1 7 31 23 31 20 22 MIN. QNH PRESSURE IN HPA 1012.6 1007.1 1002.3 1004.0 996.9 993.3 992.7 995.1 999.8 1003.9 1005.9 1009.7 992.7 DAY 19 18 25 25 29 16 4 24 2 1 17 4 MEAN QFF PRESSURE IN HPA 1018.7 1016.2 1012.3 1009.6 1003.6 997.4 995.4 998.4 1004.0 1009.9 1015.9 1018.4 1008.3 MAX. QFF PRESSURE IN HPA 1024.5 1020.4 1018.6 1015.0 1007.7 1003.4 998.2 1001.2 1008.7 1015.2 1024.0 1025.4 1025.4 DAY 30 24 3 1 6 1 7 31 23 31 20 22 MIN. QFF PRESSURE IN HPA 1012.9 1007.4 1002.6 1004.3 997.2 993.6 992.9 995.3 1000.1 1004.2 1006.2 1010.0 992.9 DAY 19 18 25 25 29 16 4 24 2 1 17 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.0 1015.3 1011.1 1008.3 1002.2 995.9 994.0 996.8 1002.8 1008.9 1015.3 1017.8 1007.2 MAX. QFE PRESSURE IN HPA 1023.5 1019.1 1016.9 1013.8 1005.9 1002.1 996.5 1000.3 1007.3 1015.0 1023.5 1024.9 1024.9 DAY 30 24 1 1 6 1 7 31 23 31 20 22 MIN. QFE PRESSURE IN HPA 1010.9 1008.5 1000.0 1002.4 996.0 992.0 991.5 993.9 998.7 1005.2 1005.4 1007.3 991.5 DAY 3 20 24 25 29 16 18 24 2 1 17 4 MEAN QNH PRESSURE IN HPA 1018.6 1016.0 1011.7 1008.9 1002.8 996.6 994.7 997.5 1003.5 1009.6 1016.0 1018.5 1007.8 MAX. QNH PRESSURE IN HPA 1024.1 1019.7 1017.5 1014.4 1006.5 1002.7 997.1 1000.9 1007.9 1015.6 1024.1 1025.5 1025.5 DAY 30 24 1 1 6 1 7 31 23 31 20 22 MIN. QNH PRESSURE IN HPA 1011.5 1009.1 1000.6 1003.0 996.6 992.6 992.1 994.5 999.3 1005.8 1006.0 1007.9 992.1 DAY 3 20 24 25 29 16 18 24 2 1 17 4 MEAN QFF PRESSURE IN HPA 1018.9 1016.3 1012.0 1009.2 1003.0 996.8 994.9 997.7 1003.7 1009.8 1016.3 1018.8 1008.1 MAX. QFF PRESSURE IN HPA 1024.5 1020.0 1017.8 1014.7 1006.8 1003.0 997.4 1001.2 1008.2 1015.9 1024.5 1025.9 1025.9 DAY 30 24 1 1 6 1 7 31 23 31 20 22 MIN. QFF PRESSURE IN HPA 1011.8 1009.4 1000.9 1003.3 996.9 992.9 992.3 994.8 999.6 1006.1 1006.3 1008.2 992.3 DAY 3 20 24 25 29 16 18 24 2 1 17 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1016.6 1012.0 1009.4 1003.3 997.1 995.2 998.1 1004.1 1010.0 1016.1 1018.5 1008.3 MAX. QFE PRESSURE IN HPA 1024.0 1019.6 1017.8 1014.2 1007.2 1003.2 997.7 1001.7 1008.3 1016.0 1023.5 1025.8 1025.8 DAY 29 15 3 1 5 1 14 31 22 31 20 22 MIN. QFE PRESSURE IN HPA 1013.1 1009.5 1000.3 1002.4 996.4 992.3 992.7 995.3 1000.0 1006.8 1006.2 1009.2 992.3 DAY 3 20 24 25 29 11 17 23 2 3 17 4 MEAN QNH PRESSURE IN HPA 1019.4 1017.2 1012.6 1010.0 1004.0 997.7 995.8 998.8 1004.7 1010.6 1016.7 1019.2 1008.9 MAX. QNH PRESSURE IN HPA 1024.6 1020.2 1018.4 1014.8 1007.8 1003.8 998.3 1002.3 1008.9 1016.6 1024.1 1026.4 1026.4 DAY 29 15 3 1 5 1 14 31 22 31 20 22 MIN. QNH PRESSURE IN HPA 1013.7 1010.1 1000.9 1003.0 997.0 992.9 993.3 995.9 1000.6 1007.4 1006.8 1009.8 992.9 DAY 3 20 24 25 29 11 17 23 2 3 17 4 MEAN QFF PRESSURE IN HPA 1019.7 1017.5 1012.9 1010.3 1004.2 998.0 996.0 999.0 1004.9 1010.9 1017.0 1019.4 1009.2 MAX. QFF PRESSURE IN HPA 1025.0 1020.5 1018.7 1015.1 1008.1 1004.1 998.5 1002.6 1009.2 1016.9 1024.5 1026.8 1026.8 DAY 29 15 4 1 5 1 14 31 22 31 20 22 MIN. QFF PRESSURE IN HPA 1014.0 1010.4 1001.2 1003.3 997.3 993.2 993.5 996.1 1000.9 1007.7 1007.1 1010.1 993.2 DAY 3 20 24 25 29 11 17 23 2 3 17 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1018.6 1016.6 1012.1 1009.3 1003.7 997.1 995.3 998.2 1004.0 1010.0 1016.2 1018.4 1008.3 MAX. QFE PRESSURE IN HPA 1024.3 1020.1 1018.0 1013.7 1008.0 1002.6 998.1 1001.4 1008.9 1016.4 1024.0 1025.6 1025.6 DAY 29 15 3 1 5 1 14 30 22 31 19 22 MIN. QFE PRESSURE IN HPA 1013.2 1008.8 1002.1 1003.7 996.8 991.4 992.2 994.9 1000.2 1006.6 1005.6 1009.4 991.4 DAY 23 20 24 25 28 11 17 23 2 5 17 4 MEAN QNH PRESSURE IN HPA 1019.3 1017.2 1012.8 1010.0 1004.3 997.7 995.9 998.8 1004.7 1010.6 1016.8 1019.1 1008.9 MAX. QNH PRESSURE IN HPA 1024.9 1020.7 1018.6 1014.3 1008.6 1003.2 998.7 1002.0 1009.5 1017.0 1024.6 1026.2 1026.2 DAY 29 15 3 1 5 1 14 30 22 31 19 22 MIN. QNH PRESSURE IN HPA 1013.8 1009.4 1002.7 1004.3 997.4 992.0 992.8 995.5 1000.8 1007.2 1006.2 1010.0 992.0 DAY 23 20 24 25 28 11 17 23 2 5 17 4 MEAN QFF PRESSURE IN HPA 1019.6 1017.5 1013.0 1010.2 1004.6 998.0 996.1 999.1 1004.9 1010.9 1017.1 1019.3 1009.2 MAX. QFF PRESSURE IN HPA 1025.3 1021.0 1018.9 1014.6 1008.9 1003.5 998.9 1002.3 1009.8 1017.3 1025.0 1026.6 1026.6 DAY 29 15 3 1 5 1 14 30 22 31 19 22 MIN. QFF PRESSURE IN HPA 1014.1 1009.7 1003.0 1004.6 997.6 992.3 993.0 995.7 1001.1 1007.5 1006.5 1010.3 992.3 DAY 23 20 24 25 28 11 17 23 2 5 17 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.3 13.8 19.3 23.5 31.2 34.8 37.0 35.9 32.3 28.1 18.4 12.7 24.8 MINIMUN AIR TEMPERATURE (C) 5.1 7.1 12.0 16.7 20.8 23.4 25.3 24.1 21.1 19.3 11.7 7.7 16.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 4 14 26 31 30 16 9 1 0 131 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 1 0 0 0 0 0 0 0 0 0 0 2 3 TEMPERATURE RECORDS LOWEST(C) 0.0 2.2 2.4 11.0 15.4 17.4 22.4 20.6 16.0 10.4 6.0 -1.0 -1.0 DAY 18 2 1 4 17 4 2 20 16 25 26 15 MAXIMUM AIR TEMPERATURE (C) 16.3 21.5 27.2 30.0 40.0 44.8 47.3 46.7 43.8 37.7 26.6 18.8 33.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 6 16 31 30 31 31 30 31 4 0 210 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.6 25.4 33.0 42.0 45.2 47.6 50.0 49.2 48.0 42.0 31.2 24.6 50.0 DAY 7 10 26 28 28 17 22 4 2 4 8 6 DIF. BETWEEN (MAX.-MIN.) (C) 11.2 14.4 15.2 13.3 19.2 21.4 22.0 22.6 22.7 18.4 14.9 11.1 17.2 MEAN DAILY TEMP. (MDT) (C) 10.7 14.3 19.6 23.4 30.4 34.1 36.3 35.4 32.5 28.5 19.2 13.3 24.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 11.6 81.4 291.3 393.1 475.4 446.7 343.9 231.9 12.6 0.0 2287.9 HEATING DEG. DAYS(BASE 18 0C) 226.3 105.5 13.5 0.5 0.0 0.0 0.0 0.0 0.0 0.0 18.8 151.5 516.1 DEWPOINT (MEAN C) 6.5 6.3 8.2 10.6 4.7 4.4 6.6 6.0 6.5 7.4 7.5 7.0 6.8 MIXING RATIO (G/KG) 6.22 6.05 7.07 8.27 5.57 5.57 6.45 6.10 6.38 6.66 6.68 6.56 6.46 VAPOUR PRESSURE (HPA) 10.07 9.80 11.36 13.22 8.90 8.87 10.22 9.68 10.19 10.69 10.77 10.61 10.37 SATURATION DEF. (HPA) 2.97 6.77 12.15 17.24 39.57 50.79 56.95 53.73 42.12 29.91 11.63 4.80 27.39 RELATIVE HUMIDITY (MEAN %) 80 65 54 50 23 19 19 19 24 31 53 70 42 RELATIVE HUMIDITY (MAX. %) 95 87 78 75 44 36 37 37 46 49 76 86 62 RELATIVE HUMIDITY (MIN. %) 54 36 27 29 9 6 6 7 9 14 29 47 23 RELATIVE HUMIDITY (MEAN% 03UTC) 92 83 73 69 41 34 36 36 45 47 73 83 59 RELATIVE HUMIDITY (MEAN% 09UTC) 68 48 35 35 11 9 9 9 14 19 37 57 29 RELATIVE HUMIDITY (MEAN% 15UTC) 73 51 43 38 14 9 9 9 12 22 44 66 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.6 15.1 13.5 21.6 0.2 0.0 0.0 0.0 0.0 0.2 9.6 10.3 109.1 DAYS WITH PRECIPITATION >=10 1 1 1 0 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 4 1 1 1 0 0 0 0 0 0 1 1 9 DAYS WITH PRECIPITATION >= 1 8 4 2 6 0 0 0 0 0 0 2 3 25 DAYS WITH PRECIPITATION 9 5 8 10 1 0 0 0 0 1 4 6 44 GREATEST DAILY PRECIPITATION 11.4 11.0 11.0 9.0 0.2 0.0 0.0 0.0 0.0 0.2 5.0 6.7 11.4 DAY 7 19 18 13 4 ** ** ** ** 31 2 1 DAY WITH THUNDER STORM 6 1 4 7 3 0 0 0 0 1 2 5 29 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 4 2 9 3 4 1 6 5 1 0 1 37 WIND DIRECTION (PREVAILING) 270 270 90 90 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.5 6.7 8.2 7.5 9.4 11.3 11.1 10.8 10.6 6.3 6.5 7.7 9.2 PREVAILING WIND PERCENT 30.6 26.3 22.6 17.9 30.6 36.7 46.8 49.2 38.8 15.7 29.2 29.8 30.1 CALMS PERCENT OF WIND 8.9 20.5 21.4 13.3 11.7 7.9 10.1 4.4 12.9 22.6 17.9 9.7 13.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 296 301 100 54 301 284 275 284 285 350 307 279 290 VECTOR WIND MAGNITUDE(KNOTS) 2.5 0.7 1.9 1.1 4.8 4.9 6.7 8.0 5.1 0.9 1.5 1.8 2.8 WIND STEADINESES (MEAN %) 41.0 11.3 32.2 15.3 58.5 55.1 77.9 85.1 67.1 17.3 27.8 25.7 39.4 WIND SPEED (MEAN KNOTS) 6.1 6.2 5.9 7.2 8.2 8.9 8.6 9.4 7.6 5.2 5.4 7.0 7.1 FASTEST WIND DIRECTION 180 100 120 260 30 270 240 290 280 30 360 300 270 FASTEST WIND SPEED (KNOTS) 23 27 25 27 23 31 25 31 29 19 23 23 31 DAY 7 12 18 3 2 30 19 23 9 20 13 13 DAYS WITH SKY CLEAR (0-2)/8 18 14 16 10 23 29 31 31 30 25 20 10 257 DAYS WITH P.CLOUDY (3-6)/8 8 13 11 9 8 1 0 0 0 4 7 18 79 DAYS WITH CLOUDY (7-8)/8 5 1 4 11 0 0 0 0 0 2 3 3 29 DAYS WITH VISIBILITY =< 2 KM 6 1 1 2 0 0 0 1 4 0 1 8 24 DURATION OF SUNSHINE HOURS 200.0 226.9 244.1 198.7 334.9 373.8 384.5 365.2 323.0 265.8 243.3 174.7 3334.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.4 1018.1 1012.8 1009.2 1004.6 999.2 997.3 997.5 1004.4 1010.0 1015.9 1018.2 1008.9 MAX. QFE PRESSURE IN HPA 1026.8 1028.3 1021.5 1016.3 1010.5 1007.1 1000.9 1004.8 1010.9 1016.1 1022.2 1028.7 1028.7 DAY-HOUR 25- 6 1- 6 12- 6 6- 6 16- 6 7- 6 26- 6 29- 6 21- 6 26- 6 29- 6 14- 6 MIN. QFE PRESSURE IN HPA 1009.1 1007.5 1002.5 1002.5 1000.0 992.9 990.9 991.2 999.9 1004.4 1007.0 1005.5 990.9 DAY-HOUR 7-12 25- 0 26-15 28-15 28-15 18-15 22-15 14-15 7-15 13-15 12-12 21- 3 MEAN QNH PRESSURE IN HPA 1020.1 1018.7 1013.4 1009.9 1005.2 999.9 998.0 998.1 1005.1 1010.6 1016.5 1018.8 1009.5 MAX. QNH PRESSURE IN HPA 1027.4 1028.9 1022.1 1016.9 1011.1 1007.7 1001.5 1005.4 1011.5 1016.7 1022.8 1029.3 1029.3 DAY-HOUR 25- 6 1- 6 12- 6 6- 6 16- 6 7- 6 26- 6 29- 6 21- 6 26- 6 29- 6 14- 6 MIN. QNH PRESSURE IN HPA 1009.7 1008.1 1003.1 1003.1 1000.6 993.5 991.5 991.8 1000.5 1005.0 1007.6 1006.1 991.5 DAY-HOUR 7-12 25- 0 26-15 28-15 28-15 18-15 22-15 14-15 7-15 13-15 12-12 21- 3 MEAN QFF PRESSURE IN HPA 1020.4 1019.0 1013.7 1010.1 1005.5 1000.1 998.2 998.3 1005.3 1010.9 1016.8 1019.1 1009.8 MAX. QFF PRESSURE IN HPA 1027.8 1029.3 1022.4 1017.2 1011.4 1008.0 1001.8 1005.7 1011.8 1017.0 1023.1 1029.7 1029.7 DAY-HOUR 25- 6 1- 6 12- 6 6- 6 16- 6 7- 6 26- 6 29- 6 21- 6 26- 6 29- 6 14- 6 MIN. QFF PRESSURE IN HPA 1010.0 1008.4 1003.4 1003.4 1000.9 993.8 991.7 992.0 1000.8 1005.3 1007.9 1006.4 991.7 DAY-HOUR 7-12 25- 0 26-15 28-15 28-15 18-15 22-15 14-15 7-15 13-15 12-12 21- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1019.2 1017.9 1012.4 1008.9 1004.1 998.9 997.0 997.0 1004.0 1009.6 1015.6 1018.0 1008.6 MAX. QFE PRESSURE IN HPA 1024.8 1026.4 1020.6 1015.5 1009.5 1006.3 999.6 1003.2 1008.9 1013.5 1019.6 1027.3 1027.3 DAY 25 1 12 1 17 7 1 30 21 26 29 14 MIN. QFE PRESSURE IN HPA 1013.6 1007.5 1004.1 1002.9 1000.1 993.6 991.5 992.5 1001.1 1005.1 1008.8 1005.8 991.5 DAY 21 25 27 3 29 17 24 14 7 13 13 21 MEAN QNH PRESSURE IN HPA 1019.8 1018.5 1013.1 1009.6 1004.7 999.5 997.6 997.6 1004.6 1010.2 1016.3 1018.7 1009.2 MAX. QNH PRESSURE IN HPA 1025.4 1027.0 1021.2 1016.1 1010.1 1006.9 1000.2 1003.8 1009.5 1014.1 1020.2 1027.9 1027.9 DAY 25 1 12 1 17 7 1 30 21 26 29 14 MIN. QNH PRESSURE IN HPA 1014.2 1008.1 1004.7 1003.5 1000.7 994.2 992.1 993.1 1001.7 1005.7 1009.4 1006.4 992.1 DAY 21 25 27 3 29 17 24 14 7 13 13 21 MEAN QFF PRESSURE IN HPA 1020.1 1018.8 1013.4 1009.8 1005.0 999.8 997.8 997.9 1004.8 1010.4 1016.5 1019.0 1009.4 MAX. QFF PRESSURE IN HPA 1025.8 1027.4 1021.5 1016.4 1010.4 1007.2 1000.5 1004.1 1009.8 1014.4 1020.5 1028.3 1028.3 DAY 25 1 12 1 17 7 1 30 21 26 29 14 MIN. QFF PRESSURE IN HPA 1014.5 1008.4 1005.0 1003.8 1001.0 994.5 992.3 993.3 1002.0 1006.0 1009.7 1006.7 992.3 DAY 21 25 27 3 29 17 24 14 8 13 13 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.2 1018.1 1013.0 1009.5 1005.0 999.7 997.6 997.8 1004.6 1010.2 1016.0 1018.1 1009.0 MAX. QFE PRESSURE IN HPA 1024.8 1026.9 1020.3 1014.8 1009.7 1006.7 1000.1 1003.6 1009.5 1014.5 1020.8 1028.2 1028.2 DAY 25 1 12 6 17 7 3 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 1012.4 1007.8 1005.6 1004.8 1001.8 994.7 992.1 993.1 1001.2 1005.3 1009.3 1005.5 992.1 DAY 11 25 26 3 29 17 23 14 6 13 13 21 MEAN QNH PRESSURE IN HPA 1019.8 1018.7 1013.6 1010.1 1005.6 1000.3 998.2 998.4 1005.2 1010.8 1016.6 1018.8 1009.7 MAX. QNH PRESSURE IN HPA 1025.4 1027.5 1020.9 1015.4 1010.3 1007.3 1000.7 1004.2 1010.1 1015.1 1021.4 1028.8 1028.8 DAY 25 1 12 6 17 7 3 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1013.0 1008.4 1006.2 1005.4 1002.4 995.3 992.7 993.7 1001.8 1005.9 1009.9 1006.1 992.7 DAY 11 25 26 3 29 17 23 14 6 13 13 21 MEAN QFF PRESSURE IN HPA 1020.1 1019.0 1013.9 1010.4 1005.8 1000.5 998.5 998.6 1005.5 1011.0 1016.9 1019.1 1009.9 MAX. QFF PRESSURE IN HPA 1025.8 1027.9 1021.2 1015.7 1010.6 1007.6 1001.0 1004.5 1010.4 1015.4 1021.7 1029.2 1029.2 DAY 25 1 12 6 17 7 3 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1013.3 1008.7 1006.5 1005.7 1002.7 995.6 992.9 994.0 1002.1 1006.2 1010.2 1006.4 992.9 DAY 11 25 26 3 29 17 23 14 6 13 13 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1020.5 1019.6 1014.3 1010.5 1006.0 1000.5 998.4 998.7 1005.9 1011.6 1017.5 1019.5 1010.3 MAX. QFE PRESSURE IN HPA 1026.8 1028.3 1021.5 1016.3 1010.5 1007.1 1000.9 1004.8 1010.9 1016.1 1022.2 1028.7 1028.7 DAY 25 1 12 6 16 7 26 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 1012.3 1010.0 1004.9 1004.3 1002.5 995.3 993.8 994.1 1002.4 1007.5 1011.7 1007.3 993.8 DAY 11 25 28 19 20 17 23 14 10 13 13 21 MEAN QNH PRESSURE IN HPA 1021.2 1020.2 1014.9 1011.1 1006.6 1001.2 999.1 999.3 1006.5 1012.2 1018.2 1020.1 1010.9 MAX. QNH PRESSURE IN HPA 1027.4 1028.9 1022.1 1016.9 1011.1 1007.7 1001.5 1005.4 1011.5 1016.7 1022.8 1029.3 1029.3 DAY 25 1 12 6 16 7 26 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1012.9 1010.6 1005.5 1004.9 1003.1 995.9 994.4 994.7 1003.0 1008.1 1012.3 1007.9 994.4 DAY 11 25 28 19 20 17 23 14 10 13 13 21 MEAN QFF PRESSURE IN HPA 1021.5 1020.5 1015.2 1011.4 1006.9 1001.4 999.3 999.6 1006.8 1012.5 1018.4 1020.4 1011.1 MAX. QFF PRESSURE IN HPA 1027.8 1029.3 1022.4 1017.2 1011.4 1008.0 1001.8 1005.7 1011.8 1017.0 1023.1 1029.7 1029.7 DAY 25 1 12 6 16 7 26 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1013.2 1010.9 1005.8 1005.2 1003.4 996.1 994.6 994.9 1003.3 1008.4 1012.6 1008.2 994.6 DAY 11 25 28 19 20 17 23 14 10 13 13 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.9 1018.9 1013.7 1010.1 1005.4 1000.0 997.9 998.1 1005.2 1010.7 1016.4 1018.5 1009.6 MAX. QFE PRESSURE IN HPA 1026.4 1028.2 1020.9 1015.3 1010.3 1006.7 1000.4 1004.1 1010.7 1015.2 1021.1 1027.5 1028.2 DAY 25 1 11 6 16 7 3 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 1011.1 1010.7 1004.7 1004.0 1001.4 995.3 993.2 993.8 1001.9 1006.3 1009.5 1006.6 993.2 DAY 21 25 28 19 19 17 22 14 10 13 12 21 MEAN QNH PRESSURE IN HPA 1020.5 1019.6 1014.3 1010.7 1006.0 1000.6 998.5 998.7 1005.8 1011.3 1017.1 1019.2 1010.2 MAX. QNH PRESSURE IN HPA 1027.0 1028.8 1021.5 1015.9 1010.9 1007.3 1001.0 1004.7 1011.3 1015.8 1021.7 1028.1 1028.8 DAY 25 1 11 6 16 7 3 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1011.7 1011.3 1005.3 1004.6 1002.0 995.9 993.8 994.4 1002.5 1006.9 1010.1 1007.2 993.8 DAY 21 25 28 19 19 17 22 14 10 13 12 21 MEAN QFF PRESSURE IN HPA 1020.8 1019.9 1014.6 1011.0 1006.3 1000.9 998.8 999.0 1006.1 1011.5 1017.4 1019.5 1010.5 MAX. QFF PRESSURE IN HPA 1027.4 1029.2 1021.8 1016.2 1011.2 1007.6 1001.3 1005.0 1011.6 1016.1 1022.0 1028.5 1029.2 DAY 25 1 11 6 16 7 3 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1012.0 1011.6 1005.6 1004.9 1002.3 996.1 994.0 994.6 1002.8 1007.2 1010.4 1007.5 994.0 DAY 21 25 28 19 19 17 22 14 10 13 12 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1017.0 1011.8 1008.5 1004.0 998.6 996.7 996.7 1003.5 1009.0 1014.8 1017.1 1008.0 MAX. QFE PRESSURE IN HPA 1024.7 1025.7 1018.9 1013.5 1009.0 1004.8 999.4 1002.6 1008.6 1013.7 1018.9 1025.7 1025.7 DAY 25 1 11 6 16 7 5 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 1009.1 1009.4 1003.0 1002.8 1000.5 993.7 991.7 991.7 1000.3 1004.7 1007.0 1007.3 991.7 DAY 7 13 26 28 19 17 22 14 7 13 12 21 MEAN QNH PRESSURE IN HPA 1019.1 1017.7 1012.5 1009.1 1004.6 999.2 997.3 997.3 1004.1 1009.7 1015.4 1017.7 1008.6 MAX. QNH PRESSURE IN HPA 1025.3 1026.3 1019.5 1014.1 1009.6 1005.4 1000.0 1003.2 1009.2 1014.3 1019.5 1026.3 1026.3 DAY 25 1 11 6 16 7 5 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1009.7 1010.0 1003.6 1003.4 1001.1 994.3 992.3 992.3 1000.9 1005.3 1007.6 1007.9 992.3 DAY 7 13 26 28 19 17 22 14 7 13 12 21 MEAN QFF PRESSURE IN HPA 1019.4 1018.0 1012.8 1009.4 1004.8 999.5 997.5 997.5 1004.4 1009.9 1015.7 1018.0 1008.9 MAX. QFF PRESSURE IN HPA 1025.7 1026.6 1019.8 1014.4 1009.9 1005.7 1000.3 1003.5 1009.5 1014.6 1019.8 1026.7 1026.7 DAY 25 1 11 6 16 7 5 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1010.0 1010.3 1003.9 1003.7 1001.4 994.6 992.5 992.5 1001.2 1005.6 1007.9 1008.2 992.5 DAY 7 13 26 28 19 17 22 14 8 13 12 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.9 1017.1 1011.7 1008.2 1003.5 998.0 996.2 996.5 1003.4 1009.1 1015.1 1017.5 1007.9 MAX. QFE PRESSURE IN HPA 1025.1 1025.7 1019.1 1013.6 1008.4 1004.8 998.7 1002.6 1008.0 1013.7 1018.9 1025.0 1025.7 DAY 31 1 11 23 16 6 2 29 21 26 29 14 MIN. QFE PRESSURE IN HPA 1009.9 1008.8 1002.5 1002.5 1000.0 992.9 990.9 991.2 999.9 1004.4 1008.6 1009.4 990.9 DAY 11 13 26 28 28 18 22 14 7 13 12 21 MEAN QNH PRESSURE IN HPA 1019.6 1017.7 1012.3 1008.8 1004.1 998.6 996.8 997.1 1004.1 1009.7 1015.8 1018.2 1008.6 MAX. QNH PRESSURE IN HPA 1025.7 1026.3 1019.7 1014.2 1009.0 1005.4 999.3 1003.2 1008.6 1014.3 1019.5 1025.6 1026.3 DAY 31 1 11 23 16 6 2 29 21 26 29 14 MIN. QNH PRESSURE IN HPA 1010.5 1009.4 1003.1 1003.1 1000.6 993.5 991.5 991.8 1000.5 1005.0 1009.2 1010.0 991.5 DAY 11 13 26 28 28 18 22 14 7 13 12 21 MEAN QFF PRESSURE IN HPA 1019.9 1018.0 1012.6 1009.1 1004.3 998.9 997.1 997.3 1004.3 1010.0 1016.0 1018.5 1008.8 MAX. QFF PRESSURE IN HPA 1026.1 1026.7 1020.0 1014.5 1009.3 1005.7 999.6 1003.5 1008.9 1014.6 1019.8 1026.0 1026.7 DAY 31 1 11 23 16 6 2 29 21 26 29 14 MIN. QFF PRESSURE IN HPA 1010.8 1009.7 1003.4 1003.4 1000.9 993.8 991.7 992.0 1000.8 1005.3 1009.5 1010.3 991.7 DAY 11 13 26 28 28 18 22 14 7 13 12 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1018.1 1012.7 1009.1 1004.6 999.1 997.5 997.7 1004.6 1010.0 1015.8 1018.3 1008.9 MAX. QFE PRESSURE IN HPA 1025.6 1027.0 1020.2 1015.3 1009.4 1005.9 1000.2 1004.3 1008.9 1014.4 1019.2 1026.9 1027.0 DAY 31 1 11 23 16 6 5 29 20 26 29 13 MIN. QFE PRESSURE IN HPA 1012.1 1009.3 1004.2 1002.9 1000.3 994.1 991.8 992.7 1001.0 1005.2 1008.6 1010.3 991.8 DAY 21 24 26 18 28 17 23 14 7 13 12 20 MEAN QNH PRESSURE IN HPA 1020.4 1018.7 1013.4 1009.8 1005.2 999.7 998.1 998.4 1005.2 1010.6 1016.5 1018.9 1009.6 MAX. QNH PRESSURE IN HPA 1026.2 1027.6 1020.8 1015.9 1010.0 1006.5 1000.8 1004.9 1009.5 1015.0 1019.8 1027.5 1027.6 DAY 31 1 11 23 16 6 5 29 20 26 29 13 MIN. QNH PRESSURE IN HPA 1012.7 1009.9 1004.8 1003.5 1000.9 994.7 992.4 993.3 1001.6 1005.8 1009.2 1010.9 992.4 DAY 21 24 26 18 28 17 23 14 7 13 12 20 MEAN QFF PRESSURE IN HPA 1020.7 1019.0 1013.7 1010.0 1005.4 999.9 998.3 998.6 1005.5 1010.8 1016.7 1019.2 1009.8 MAX. QFF PRESSURE IN HPA 1026.6 1028.0 1021.1 1016.2 1010.3 1006.8 1001.1 1005.2 1009.8 1015.3 1020.1 1027.9 1028.0 DAY 31 1 11 23 16 6 5 29 20 26 29 13 MIN. QFF PRESSURE IN HPA 1013.0 1010.2 1005.1 1003.8 1001.1 994.9 992.6 993.5 1001.9 1006.1 1009.5 1011.2 992.6 DAY 21 24 26 18 28 17 23 14 7 13 12 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1018.0 1012.9 1009.3 1004.7 999.2 997.5 997.7 1004.5 1009.9 1015.8 1018.3 1009.0 MAX. QFE PRESSURE IN HPA 1026.1 1026.6 1020.8 1014.8 1010.5 1006.7 1000.3 1003.8 1009.2 1014.0 1019.5 1027.3 1027.3 DAY 31 1 11 23 16 6 16 29 20 26 28 13 MIN. QFE PRESSURE IN HPA 1012.8 1008.6 1004.8 1004.8 1000.3 994.4 991.9 992.9 1001.3 1005.6 1008.2 1008.8 991.9 DAY 21 24 26 18 28 16 22 13 10 12 12 20 MEAN QNH PRESSURE IN HPA 1020.4 1018.6 1013.5 1009.9 1005.3 999.9 998.1 998.3 1005.1 1010.6 1016.4 1019.0 1009.6 MAX. QNH PRESSURE IN HPA 1026.7 1027.2 1021.4 1015.4 1011.1 1007.3 1000.9 1004.4 1009.8 1014.6 1020.1 1027.9 1027.9 DAY 31 1 11 23 16 6 16 29 20 26 28 13 MIN. QNH PRESSURE IN HPA 1013.4 1009.2 1005.4 1005.4 1000.9 995.0 992.5 993.5 1001.9 1006.2 1008.8 1009.4 992.5 DAY 21 24 26 18 28 16 22 13 10 12 12 20 MEAN QFF PRESSURE IN HPA 1020.7 1018.9 1013.8 1010.1 1005.5 1000.1 998.3 998.5 1005.3 1010.8 1016.7 1019.3 1009.8 MAX. QFF PRESSURE IN HPA 1027.1 1027.6 1021.7 1015.7 1011.4 1007.6 1001.2 1004.7 1010.1 1014.9 1020.4 1028.3 1028.3 DAY 31 1 11 23 16 6 16 29 20 26 28 13 MIN. QFF PRESSURE IN HPA 1013.7 1009.5 1005.7 1005.7 1001.1 995.2 992.7 993.7 1002.2 1006.5 1009.1 1009.7 992.7 DAY 21 24 26 18 28 17 22 13 10 12 12 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 12.1 14.4 17.6 25.2 31.4 35.5 36.4 36.8 31.7 27.8 17.8 13.0 25.0 MINIMUN AIR TEMPERATURE (C) 6.8 8.4 11.1 18.2 22.3 25.0 25.2 25.9 20.4 19.2 10.8 8.7 16.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 8 20 30 31 31 12 11 0 0 143 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 2.2 3.0 2.0 7.2 14.4 21.2 22.2 22.0 15.6 9.8 3.4 2.4 2.0 DAY 18 28 2 2 9 6 25 17 11 31 18 22 MAXIMUM AIR TEMPERATURE (C) 18.6 21.4 24.8 32.9 39.5 44.8 46.4 47.5 42.8 37.2 25.5 18.3 33.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 25 31 30 31 31 30 30 7 0 217 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.4 26.0 31.0 38.2 43.6 47.6 48.6 51.4 47.6 41.4 32.6 22.6 51.4 DAY 8 24 31 5 26 16 6 7 3 1 6 17 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 13.0 13.7 14.7 17.2 19.8 21.2 21.6 22.4 18.0 14.7 9.6 16.5 MEAN DAILY TEMP. (MDT) (C) 12.7 14.9 17.9 25.5 30.9 34.9 35.8 36.7 31.6 28.2 18.2 13.5 25.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 9.4 138.8 307.0 417.0 459.5 486.5 318.0 225.7 11.6 0.0 2373.5 HEATING DEG. DAYS(BASE 18 0C) 163.1 88.4 44.1 0.1 0.0 0.0 0.0 0.0 0.0 0.1 47.4 139.7 482.9 DEWPOINT (MEAN C) 6.4 4.8 5.0 8.8 5.7 5.9 7.5 9.7 5.9 8.8 7.4 9.4 7.1 MIXING RATIO (G/KG) 6.09 5.58 5.65 7.41 5.94 6.11 6.68 8.21 5.98 7.63 6.79 7.50 6.63 VAPOUR PRESSURE (HPA) 9.87 9.01 9.11 11.87 9.52 9.71 10.57 12.97 9.54 12.21 10.95 12.13 10.62 SATURATION DEF. (HPA) 4.75 8.00 12.07 21.76 39.18 51.73 54.03 53.55 41.13 27.54 10.79 3.35 27.32 RELATIVE HUMIDITY (MEAN %) 71 57 48 40 23 19 20 23 23 34 55 81 41 RELATIVE HUMIDITY (MAX. %) 90 82 73 64 42 34 34 43 40 53 72 93 60 RELATIVE HUMIDITY (MIN. %) 45 29 23 20 10 8 8 9 10 16 34 60 23 RELATIVE HUMIDITY (MEAN% 03UTC) 87 74 65 59 39 33 34 41 40 49 70 91 57 RELATIVE HUMIDITY (MEAN% 09UTC) 62 42 31 25 13 9 10 14 14 22 42 74 30 RELATIVE HUMIDITY (MEAN% 15UTC) 62 46 37 29 14 12 11 11 13 25 48 75 32 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.2 6.0 23.6 9.2 1.0 0.0 0.0 0.0 0.0 0.0 98.1 33.5 204.6 DAYS WITH PRECIPITATION >=10 1 0 1 0 0 0 0 0 0 0 3 1 6 DAYS WITH PRECIPITATION >= 5 3 0 2 0 0 0 0 0 0 0 4 2 11 DAYS WITH PRECIPITATION >= 1 3 2 4 4 1 0 0 0 0 0 4 4 22 DAYS WITH PRECIPITATION 5 4 4 8 1 0 0 0 0 0 5 7 34 GREATEST DAILY PRECIPITATION 19.0 4.8 14.0 3.0 1.0 0.0 0.0 0.0 0.0 0.0 63.0 20.0 63.0 DAY 23 13 26 22 8 ** ** ** ** ** 10 6 DAY WITH THUNDER STORM 2 0 3 6 1 0 0 0 0 1 2 4 19 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 6 11 15 18 13 18 8 8 5 4 1 109 WIND DIRECTION (PREVAILING) 90 270 270 90 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.2 9.0 8.4 9.6 10.2 11.3 12.0 9.5 9.7 8.9 8.7 8.6 9.8 PREVAILING WIND PERCENT 28.2 31.3 25.4 18.8 31.9 45.4 67.3 30.6 39.6 24.6 32.9 31.0 33.4 CALMS PERCENT OF WIND 12.1 6.7 6.0 7.9 7.7 7.1 2.8 8.1 11.3 15.7 18.8 7.3 9.3 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 74 273 276 70 288 285 281 275 291 259 303 311 288 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.9 0.5 0.5 4.9 7.5 10.5 2.8 6.4 0.7 2.8 2.9 3.2 WIND STEADINESES (MEAN %) 9.1 10.7 6.1 5.6 61.2 78.9 93.8 36.8 82.1 9.6 40.0 36.7 39.0 WIND SPEED (MEAN KNOTS) 6.6 8.4 8.2 9.0 8.0 9.5 11.2 7.6 7.8 7.3 7.0 7.9 8.2 FASTEST WIND DIRECTION 90 120 160 100 220 270 280 290 280 150 120 270 160 FASTEST WIND SPEED (KNOTS) 23 27 37 29 29 29 27 29 23 29 25 19 37 DAY 28 4 7 7 18 17 10 16 6 28 10 6 DAYS WITH SKY CLEAR (0-2)/8 18 19 14 12 21 26 31 31 30 23 14 15 254 DAYS WITH P.CLOUDY (3-6)/8 9 6 14 11 9 2 0 0 0 6 12 9 78 DAYS WITH CLOUDY (7-8)/8 4 3 3 7 0 2 0 0 0 2 4 7 32 DAYS WITH VISIBILITY =< 2 KM 7 1 7 1 5 3 0 0 1 1 2 15 43 DURATION OF SUNSHINE HOURS 206.7 202.4 181.2 186.2 221.8 307.0 360.4 345.6 322.0 259.8 216.1 161.4 2970.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.5 1014.8 1013.2 1009.5 1006.2 998.7 995.3 997.5 1003.6 1010.2 1016.3 1019.3 1008.6 MAX. QFE PRESSURE IN HPA 1026.1 1023.8 1024.5 1017.5 1013.4 1008.4 1001.6 1003.3 1009.3 1018.6 1023.8 1027.1 1027.1 DAY-HOUR 6- 6 6- 6 2- 6 29- 6 1- 6 2- 9 3- 6 29- 6 20- 6 31- 6 25- 6 30- 6 MIN. QFE PRESSURE IN HPA 1003.7 1004.0 999.7 999.9 998.0 990.9 991.9 994.1 996.7 1003.0 1008.1 1007.1 990.9 DAY-HOUR 28-12 20-12 12-12 27-15 28-15 30-15 7-15 21- 0 4-15 1-15 8-21 6- 0 MEAN QNH PRESSURE IN HPA 1019.1 1015.4 1013.8 1010.1 1006.8 999.3 995.9 998.1 1004.2 1010.8 1017.0 1019.9 1009.2 MAX. QNH PRESSURE IN HPA 1026.7 1024.4 1025.1 1018.1 1014.0 1009.0 1002.2 1003.9 1009.9 1019.2 1024.4 1027.7 1027.7 DAY-HOUR 6- 6 6- 6 2- 6 29- 6 1- 6 2- 9 3- 6 29- 6 20- 6 31- 6 25- 6 30- 6 MIN. QNH PRESSURE IN HPA 1004.3 1004.6 1000.3 1000.5 998.6 991.5 992.5 994.7 997.3 1003.6 1008.7 1007.7 991.5 DAY-HOUR 28-12 20-12 12-12 27-15 28-15 30-15 7-15 21- 0 4-15 1-15 8-21 6- 0 MEAN QFF PRESSURE IN HPA 1019.4 1015.7 1014.1 1010.4 1007.1 999.6 996.2 998.3 1004.4 1011.1 1017.3 1020.2 1009.5 MAX. QFF PRESSURE IN HPA 1027.0 1024.8 1025.5 1018.4 1014.3 1009.3 1002.4 1004.2 1010.2 1019.5 1024.7 1028.1 1028.1 DAY-HOUR 6- 6 6- 6 2- 6 29- 6 1- 6 2- 9 3- 6 29- 6 20- 6 31- 6 25- 6 30- 6 MIN. QFF PRESSURE IN HPA 1004.6 1004.9 1000.6 1000.8 998.9 991.7 992.7 994.9 997.6 1003.9 1009.0 1008.0 991.7 DAY-HOUR 28-12 20-12 12-12 27-15 28-15 30-15 7-15 21- 0 4-15 1-15 8-21 6- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1018.3 1014.7 1013.0 1009.1 1005.9 998.6 994.9 997.0 1003.1 1009.8 1016.0 1019.1 1008.3 MAX. QFE PRESSURE IN HPA 1024.8 1022.2 1022.7 1015.5 1012.0 1006.2 999.6 1001.0 1007.4 1017.0 1021.0 1025.6 1025.6 DAY 7 6 2 30 1 2 3 30 20 31 22 22 MIN. QFE PRESSURE IN HPA 1009.5 1006.6 1001.1 1003.4 999.8 992.3 992.4 994.1 997.8 1004.8 1008.2 1007.1 992.3 DAY 28 20 26 27 29 30 7 21 1 2 9 6 MEAN QNH PRESSURE IN HPA 1018.9 1015.3 1013.6 1009.8 1006.5 999.2 995.5 997.6 1003.7 1010.4 1016.6 1019.7 1008.9 MAX. QNH PRESSURE IN HPA 1025.4 1022.8 1023.3 1016.1 1012.6 1006.8 1000.2 1001.6 1008.0 1017.6 1021.6 1026.2 1026.2 DAY 7 6 2 30 1 2 3 30 20 31 22 22 MIN. QNH PRESSURE IN HPA 1010.1 1007.2 1001.7 1004.0 1000.4 992.9 993.0 994.7 998.4 1005.4 1008.8 1007.7 992.9 DAY 28 20 26 27 29 30 7 21 1 2 9 6 MEAN QFF PRESSURE IN HPA 1019.2 1015.6 1013.9 1010.0 1006.8 999.4 995.8 997.8 1004.0 1010.7 1016.9 1020.0 1009.2 MAX. QFF PRESSURE IN HPA 1025.7 1023.1 1023.6 1016.4 1012.9 1007.1 1000.4 1001.9 1008.3 1017.9 1021.9 1026.6 1026.6 DAY 7 6 2 30 1 2 3 30 20 31 22 22 MIN. QFF PRESSURE IN HPA 1010.4 1007.5 1002.0 1004.3 1000.7 993.1 993.2 994.9 998.7 1005.7 1009.1 1008.0 993.1 DAY 28 20 26 27 29 30 7 21 1 2 9 6 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.3 1014.7 1013.4 1009.7 1006.6 999.2 995.6 998.0 1003.7 1010.4 1016.3 1019.2 1008.8 MAX. QFE PRESSURE IN HPA 1024.8 1022.5 1023.0 1016.1 1012.4 1007.2 1000.9 1002.0 1008.2 1017.1 1022.0 1025.4 1025.4 DAY 7 6 2 29 1 4 3 29 27 31 25 30 MIN. QFE PRESSURE IN HPA 1006.0 1004.9 1003.9 1004.0 1001.2 992.4 992.8 994.8 998.4 1005.6 1009.1 1008.3 992.4 DAY 28 20 26 20 29 30 1 21 1 1 9 6 MEAN QNH PRESSURE IN HPA 1019.0 1015.4 1014.1 1010.4 1007.2 999.8 996.2 998.6 1004.3 1011.0 1017.0 1019.8 1009.4 MAX. QNH PRESSURE IN HPA 1025.4 1023.1 1023.6 1016.7 1013.0 1007.8 1001.5 1002.6 1008.8 1017.7 1022.6 1026.0 1026.0 DAY 7 6 2 29 1 4 3 29 27 31 25 30 MIN. QNH PRESSURE IN HPA 1006.6 1005.5 1004.5 1004.6 1001.8 993.0 993.4 995.4 999.0 1006.2 1009.7 1008.9 993.0 DAY 28 20 26 20 29 30 1 21 1 1 9 6 MEAN QFF PRESSURE IN HPA 1019.3 1015.7 1014.4 1010.6 1007.5 1000.0 996.5 998.9 1004.6 1011.3 1017.2 1020.1 1009.7 MAX. QFF PRESSURE IN HPA 1025.7 1023.4 1024.0 1017.0 1013.3 1008.1 1001.8 1002.9 1009.1 1018.0 1022.9 1026.4 1026.4 DAY 7 6 2 29 1 4 3 29 27 31 25 30 MIN. QFF PRESSURE IN HPA 1006.9 1005.8 1004.8 1004.9 1002.1 993.2 993.7 995.6 999.3 1006.5 1010.0 1009.2 993.2 DAY 28 20 26 20 29 30 1 21 1 1 9 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.8 1016.0 1014.7 1010.9 1007.6 999.9 996.4 999.0 1004.9 1011.8 1017.9 1020.6 1009.9 MAX. QFE PRESSURE IN HPA 1026.1 1023.8 1024.5 1017.5 1013.4 1008.1 1001.6 1003.3 1009.3 1018.6 1023.8 1027.1 1027.1 DAY 6 6 2 29 1 3 3 29 20 31 25 30 MIN. QFE PRESSURE IN HPA 1006.3 1004.1 1004.0 1004.0 1002.5 993.3 993.7 996.5 999.5 1006.8 1011.4 1009.4 993.3 DAY 28 20 12 27 29 30 7 21 6 2 9 6 MEAN QNH PRESSURE IN HPA 1020.4 1016.6 1015.3 1011.6 1008.2 1000.5 997.0 999.6 1005.5 1012.5 1018.5 1021.2 1010.6 MAX. QNH PRESSURE IN HPA 1026.7 1024.4 1025.1 1018.1 1014.0 1008.7 1002.2 1003.9 1009.9 1019.2 1024.4 1027.7 1027.7 DAY 6 6 2 29 1 3 3 29 20 31 25 30 MIN. QNH PRESSURE IN HPA 1006.9 1004.7 1004.6 1004.6 1003.1 993.9 994.3 997.1 1000.1 1007.4 1012.0 1010.0 993.9 DAY 28 20 12 27 29 30 7 21 6 2 9 6 MEAN QFF PRESSURE IN HPA 1020.7 1016.9 1015.6 1011.8 1008.4 1000.8 997.2 999.9 1005.8 1012.7 1018.8 1021.5 1010.8 MAX. QFF PRESSURE IN HPA 1027.0 1024.8 1025.5 1018.4 1014.3 1009.0 1002.4 1004.2 1010.2 1019.5 1024.7 1028.1 1028.1 DAY 6 6 2 29 1 3 3 29 20 31 25 30 MIN. QFF PRESSURE IN HPA 1007.2 1005.0 1004.9 1004.9 1003.4 994.2 994.5 997.3 1000.4 1007.7 1012.3 1010.3 994.2 DAY 28 20 12 27 29 30 7 21 6 2 9 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1015.4 1014.1 1010.2 1007.0 999.4 996.0 998.4 1004.3 1010.9 1017.0 1019.7 1009.3 MAX. QFE PRESSURE IN HPA 1025.2 1023.2 1023.6 1016.9 1012.5 1008.4 1001.1 1002.8 1009.0 1017.9 1023.4 1025.9 1025.9 DAY 7 6 2 29 1 2 3 29 27 31 25 30 MIN. QFE PRESSURE IN HPA 1004.4 1004.1 1001.8 1002.2 1001.6 992.7 993.2 996.1 999.1 1006.3 1010.6 1010.1 992.7 DAY 28 20 12 27 28 30 7 21 4 1 8 6 MEAN QNH PRESSURE IN HPA 1019.6 1016.0 1014.7 1010.9 1007.6 1000.0 996.6 999.0 1004.9 1011.5 1017.7 1020.4 1009.9 MAX. QNH PRESSURE IN HPA 1025.8 1023.8 1024.2 1017.5 1013.1 1009.0 1001.7 1003.4 1009.6 1018.5 1024.0 1026.5 1026.5 DAY 7 6 2 29 1 2 3 29 27 31 25 30 MIN. QNH PRESSURE IN HPA 1005.0 1004.7 1002.4 1002.8 1002.2 993.3 993.8 996.7 999.7 1006.9 1011.2 1010.7 993.3 DAY 28 20 12 27 28 30 7 21 4 1 8 6 MEAN QFF PRESSURE IN HPA 1019.9 1016.3 1015.0 1011.1 1007.9 1000.2 996.8 999.2 1005.1 1011.7 1017.9 1020.6 1010.2 MAX. QFF PRESSURE IN HPA 1026.1 1024.1 1024.5 1017.8 1013.4 1009.3 1001.9 1003.7 1009.9 1018.8 1024.3 1026.8 1026.8 DAY 7 6 2 29 1 2 3 29 27 31 25 30 MIN. QFF PRESSURE IN HPA 1005.3 1005.0 1002.7 1003.1 1002.5 993.5 994.0 996.9 1000.0 1007.2 1011.5 1011.0 993.5 DAY 28 20 12 27 28 30 7 21 4 1 9 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1013.7 1012.2 1008.6 1005.6 998.0 994.7 996.8 1002.8 1009.2 1015.5 1018.4 1007.7 MAX. QFE PRESSURE IN HPA 1023.9 1021.1 1021.4 1014.9 1011.2 1007.8 1000.3 1000.6 1007.2 1016.8 1022.2 1024.6 1024.6 DAY 6 6 2 29 10 2 3 29 27 31 25 30 MIN. QFE PRESSURE IN HPA 1003.7 1004.0 999.7 1000.7 999.0 991.2 992.3 995.0 997.1 1003.8 1008.5 1011.1 991.2 DAY 28 20 12 20 28 30 7 21 4 1 9 6 MEAN QNH PRESSURE IN HPA 1018.2 1014.3 1012.8 1009.2 1006.2 998.6 995.3 997.4 1003.4 1009.8 1016.1 1019.1 1008.4 MAX. QNH PRESSURE IN HPA 1024.5 1021.7 1022.0 1015.5 1011.8 1008.4 1000.9 1001.2 1007.8 1017.4 1022.8 1025.2 1025.2 DAY 6 6 2 29 10 2 3 29 27 31 25 30 MIN. QNH PRESSURE IN HPA 1004.3 1004.6 1000.3 1001.3 999.6 991.8 992.9 995.6 997.7 1004.4 1009.1 1011.7 991.8 DAY 28 20 12 20 28 30 7 21 4 1 9 6 MEAN QFF PRESSURE IN HPA 1018.5 1014.6 1013.1 1009.5 1006.4 998.9 995.6 997.6 1003.6 1010.0 1016.4 1019.4 1008.6 MAX. QFF PRESSURE IN HPA 1024.8 1022.0 1022.3 1015.8 1012.1 1008.7 1001.1 1001.5 1008.1 1017.7 1023.1 1025.5 1025.5 DAY 6 6 2 29 10 2 3 29 27 31 25 30 MIN. QFF PRESSURE IN HPA 1004.6 1004.9 1000.6 1001.6 999.9 992.0 993.1 995.8 998.0 1004.7 1009.4 1012.0 992.0 DAY 28 20 12 20 28 30 7 21 4 1 9 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.8 1013.8 1012.0 1008.2 1005.1 997.6 994.3 996.2 1002.5 1009.3 1015.6 1018.8 1007.6 MAX. QFE PRESSURE IN HPA 1024.0 1020.9 1021.4 1014.2 1011.4 1006.6 999.3 1000.3 1007.2 1016.3 1022.2 1024.7 1024.7 DAY 6 6 1 29 10 2 3 29 19 31 25 29 MIN. QFE PRESSURE IN HPA 1005.9 1005.2 1000.1 999.9 998.0 990.9 991.9 994.2 996.7 1003.0 1008.2 1010.9 990.9 DAY 28 19 12 27 28 30 7 20 4 1 8 5 MEAN QNH PRESSURE IN HPA 1018.5 1014.5 1012.7 1008.9 1005.7 998.2 994.9 996.8 1003.1 1009.9 1016.3 1019.4 1008.2 MAX. QNH PRESSURE IN HPA 1024.6 1021.5 1022.0 1014.8 1012.0 1007.2 999.9 1000.9 1007.8 1016.9 1022.8 1025.3 1025.3 DAY 6 6 1 29 10 2 3 29 19 31 25 29 MIN. QNH PRESSURE IN HPA 1006.5 1005.8 1000.7 1000.5 998.6 991.5 992.5 994.8 997.3 1003.6 1008.8 1011.5 991.5 DAY 28 19 12 27 28 30 7 20 4 1 8 5 MEAN QFF PRESSURE IN HPA 1018.8 1014.8 1013.0 1009.1 1005.9 998.4 995.1 997.0 1003.4 1010.2 1016.6 1019.7 1008.5 MAX. QFF PRESSURE IN HPA 1024.9 1021.8 1022.4 1015.1 1012.3 1007.5 1000.2 1001.2 1008.1 1017.2 1023.1 1025.6 1025.6 DAY 6 6 1 29 10 2 3 29 19 31 25 29 MIN. QFF PRESSURE IN HPA 1006.8 1006.1 1001.0 1000.8 998.9 991.7 992.7 995.1 997.6 1003.9 1009.1 1011.8 991.7 DAY 28 19 12 27 28 30 7 20 4 1 8 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1018.7 1015.0 1013.0 1009.5 1006.0 998.6 995.4 997.3 1003.7 1010.3 1016.3 1019.4 1008.6 MAX. QFE PRESSURE IN HPA 1024.8 1021.7 1022.6 1015.4 1011.8 1007.4 999.7 1001.4 1008.2 1016.9 1022.2 1025.7 1025.7 DAY 6 5 1 29 10 2 3 29 19 31 25 29 MIN. QFE PRESSURE IN HPA 1008.8 1007.1 1003.1 1002.2 998.7 992.6 992.9 995.0 998.0 1004.1 1008.7 1010.2 992.6 DAY 28 19 12 20 28 30 25 20 4 1 8 5 MEAN QNH PRESSURE IN HPA 1019.3 1015.7 1013.7 1010.1 1006.6 999.2 996.1 997.9 1004.4 1010.9 1016.9 1020.0 1009.2 MAX. QNH PRESSURE IN HPA 1025.4 1022.3 1023.2 1016.0 1012.4 1008.0 1000.3 1002.0 1008.8 1017.5 1022.8 1026.3 1026.3 DAY 6 5 1 29 10 2 3 29 19 31 25 29 MIN. QNH PRESSURE IN HPA 1009.4 1007.7 1003.7 1002.8 999.3 993.2 993.5 995.6 998.6 1004.7 1009.3 1010.8 993.2 DAY 28 19 12 20 28 30 25 20 4 1 8 5 MEAN QFF PRESSURE IN HPA 1019.6 1016.0 1014.0 1010.4 1006.8 999.5 996.3 998.2 1004.6 1011.1 1017.2 1020.3 1009.5 MAX. QFF PRESSURE IN HPA 1025.7 1022.6 1023.6 1016.3 1012.7 1008.3 1000.6 1002.3 1009.1 1017.8 1023.1 1026.7 1026.7 DAY 6 5 1 29 10 2 3 29 19 31 25 29 MIN. QFF PRESSURE IN HPA 1009.7 1008.0 1004.0 1003.1 999.6 993.4 993.7 995.8 998.9 1005.0 1009.6 1011.1 993.4 DAY 28 19 12 20 28 30 25 20 4 1 8 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1015.1 1013.4 1009.8 1006.1 998.6 995.5 997.4 1003.6 1010.3 1016.2 1019.2 1008.6 MAX. QFE PRESSURE IN HPA 1024.8 1022.3 1022.4 1016.1 1010.9 1007.3 999.4 1001.4 1008.2 1016.9 1021.3 1025.6 1025.6 DAY 6 5 1 29 10 3 2 29 19 30 21 21 MIN. QFE PRESSURE IN HPA 1009.6 1006.9 1006.0 1004.0 999.8 993.0 993.3 995.2 997.6 1004.6 1008.1 1008.6 993.0 DAY 27 19 12 20 28 30 25 20 3 1 8 5 MEAN QNH PRESSURE IN HPA 1019.0 1015.7 1014.0 1010.4 1006.8 999.3 996.1 998.0 1004.2 1010.9 1016.8 1019.9 1009.3 MAX. QNH PRESSURE IN HPA 1025.4 1022.9 1023.0 1016.7 1011.5 1007.9 1000.0 1002.0 1008.8 1017.5 1021.9 1026.2 1026.2 DAY 6 5 1 29 10 3 2 29 19 30 21 21 MIN. QNH PRESSURE IN HPA 1010.2 1007.5 1006.6 1004.6 1000.4 993.6 993.9 995.8 998.2 1005.2 1008.7 1009.2 993.6 DAY 27 19 12 20 28 30 25 20 3 1 8 5 MEAN QFF PRESSURE IN HPA 1019.3 1016.0 1014.3 1010.7 1007.0 999.5 996.3 998.3 1004.5 1011.2 1017.1 1020.2 1009.5 MAX. QFF PRESSURE IN HPA 1025.7 1023.2 1023.3 1017.0 1011.8 1008.2 1000.2 1002.3 1009.1 1017.8 1022.2 1026.6 1026.6 DAY 6 5 1 29 10 3 2 29 19 31 21 21 MIN. QFF PRESSURE IN HPA 1010.5 1007.8 1006.9 1004.9 1000.7 993.8 994.1 996.0 998.4 1005.5 1009.0 1009.5 993.8 DAY 27 19 12 20 28 30 25 20 3 1 8 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 13.7 14.0 19.9 22.8 30.1 34.8 36.8 35.2 31.7 27.4 19.0 10.0 24.6 MINIMUN AIR TEMPERATURE (C) 9.5 8.0 12.4 15.6 20.8 23.5 26.0 24.0 20.9 18.1 13.1 5.4 16.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 10 25 31 30 14 8 2 0 121 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS LOWEST(C) 5.4 2.4 6.6 4.0 16.0 18.8 21.6 20.6 14.2 10.0 0.8 -1.0 -1.0 DAY 21 24 18 6 24 23 2 31 14 24 30 18 MAXIMUM AIR TEMPERATURE (C) 18.5 20.4 28.0 30.0 38.3 44.4 46.8 46.0 42.8 37.6 25.8 15.9 32.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 12 15 31 30 31 31 30 31 8 0 219 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.8 26.4 33.2 37.6 43.0 48.0 48.6 48.6 49.0 41.8 33.0 20.2 49.0 DAY 25 28 5 28 27 7 26 7 8 9 1 3 DIF. BETWEEN (MAX.-MIN.) (C) 9.0 12.4 15.6 14.4 17.5 20.9 20.8 22.0 21.9 19.5 12.7 10.5 16.5 MEAN DAILY TEMP. (MDT) (C) 14.0 14.2 20.2 22.8 29.5 34.0 36.4 35.0 31.9 27.8 19.5 10.6 24.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 32.9 69.6 264.3 388.9 476.7 434.3 325.9 211.8 39.6 0.0 2244.0 HEATING DEG. DAYS(BASE 18 0C) 123.6 112.0 18.7 3.9 0.0 0.0 0.0 0.0 0.0 0.0 52.8 228.5 539.5 DEWPOINT (MEAN C) 10.5 6.3 7.9 8.7 8.3 6.6 10.1 8.2 7.8 7.2 9.5 5.2 8.0 MIXING RATIO (G/KG) 8.02 6.18 6.91 7.43 7.14 6.34 8.19 7.01 7.10 6.68 7.74 5.68 7.03 VAPOUR PRESSURE (HPA) 12.92 10.01 11.12 11.90 11.40 10.08 12.93 11.12 11.31 10.73 12.46 9.21 11.26 SATURATION DEF. (HPA) 3.08 6.61 13.47 17.32 33.75 49.22 53.18 50.01 39.36 28.57 11.19 3.50 25.77 RELATIVE HUMIDITY (MEAN %) 83 63 50 45 30 21 23 22 27 32 58 75 44 RELATIVE HUMIDITY (MAX. %) 95 85 75 71 53 39 42 41 50 52 78 91 64 RELATIVE HUMIDITY (MIN. %) 60 36 23 23 14 8 9 8 9 13 34 52 24 RELATIVE HUMIDITY (MEAN% 03UTC) 92 80 70 64 50 38 40 40 47 50 74 87 61 RELATIVE HUMIDITY (MEAN% 09UTC) 73 48 31 28 17 10 13 12 15 18 42 63 31 RELATIVE HUMIDITY (MEAN% 15UTC) 77 53 44 34 18 11 13 12 16 23 49 71 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 105.6 8.1 1.9 29.0 2.6 0.0 0.0 0.0 0.0 0.0 32.0 81.5 260.7 DAYS WITH PRECIPITATION >=10 3 0 0 1 0 0 0 0 0 0 1 3 8 DAYS WITH PRECIPITATION >= 5 5 0 0 3 0 0 0 0 0 0 2 4 14 DAYS WITH PRECIPITATION >= 1 7 3 1 4 1 0 0 0 0 0 4 6 26 DAYS WITH PRECIPITATION 12 4 2 5 2 0 0 0 0 0 4 9 38 GREATEST DAILY PRECIPITATION 48.0 4.0 1.4 14.2 2.0 0.0 0.0 0.0 0.0 0.0 20.0 30.7 48.0 DAY 13 15 19 24 1 ** ** ** ** ** 23 8 DAY WITH THUNDER STORM 7 5 1 6 5 0 0 0 0 2 3 4 33 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 1 11 4 12 13 5 1 6 3 2 4 0 62 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 315 315 270 270 PREVAILING WIND SPEED(KNOTS) 7.5 9.1 8.6 10.6 10.3 11.6 9.6 10.9 9.0 7.6 7.7 7.2 9.6 PREVAILING WIND PERCENT 23.8 28.4 23.8 20.4 32.7 52.5 33.1 55.2 27.5 21.8 19.6 33.1 30.6 CALMS PERCENT OF WIND 10.1 12.5 12.9 10.0 10.9 4.6 7.3 6.9 17.1 23.4 15.8 12.5 12.0 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 351 291 279 281 279 283 268 283 288 304 324 306 286 VECTOR WIND MAGNITUDE(KNOTS) 0.6 3.0 2.8 1.4 4.5 9.0 3.7 8.0 2.9 1.6 1.1 3.9 3.4 WIND STEADINESES (MEAN %) 8.6 40.0 40.6 16.9 53.6 85.7 47.4 85.1 43.9 29.1 16.7 58.2 44.7 WIND SPEED (MEAN KNOTS) 7.0 7.5 6.9 8.3 8.4 10.5 7.8 9.4 6.6 5.5 6.6 6.7 7.6 FASTEST WIND DIRECTION 150 290 260 300 280 300 270 300 300 240 270 300 300 FASTEST WIND SPEED (KNOTS) 23 29 21 23 27 29 27 29 31 17 29 21 31 DAY 3 15 22 5 5 12 5 3 12 3 23 13 DAYS WITH SKY CLEAR (0-2)/8 12 19 15 16 24 29 27 31 30 25 13 18 259 DAYS WITH P.CLOUDY (3-6)/8 12 7 13 5 7 1 4 0 0 6 14 6 75 DAYS WITH CLOUDY (7-8)/8 7 3 3 9 0 0 0 0 0 0 3 7 32 DAYS WITH VISIBILITY =< 2 KM 11 4 2 1 3 0 0 0 2 2 2 5 32 DURATION OF SUNSHINE HOURS 174.4 218.9 247.6 235.9 302.8 359.7 357.5 366.6 318.1 274.9 198.6 183.7 3238.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1015.4 1018.1 1013.9 1009.7 1004.7 999.5 996.6 997.9 1004.5 1011.7 1016.0 1018.9 1008.9 MAX. QFE PRESSURE IN HPA 1021.2 1027.1 1019.3 1018.5 1013.5 1008.0 1000.5 1003.7 1011.0 1017.9 1027.6 1029.1 1029.1 DAY-HOUR 1- 6 8- 6 17- 6 6- 6 18- 6 3- 6 6- 6 29- 6 30- 6 24- 6 28- 6 18- 6 MIN. QFE PRESSURE IN HPA 1009.1 1008.7 1001.1 1002.0 997.2 991.7 990.7 992.4 997.6 1006.1 1006.2 1008.4 990.7 DAY-HOUR 13- 6 15- 3 31-15 16-12 13- 0 19-15 10-15 3- 0 1-12 8-12 23- 0 25-12 MEAN QNH PRESSURE IN HPA 1016.1 1018.7 1014.5 1010.3 1005.4 1000.1 997.2 998.6 1005.1 1012.4 1016.7 1019.6 1009.5 MAX. QNH PRESSURE IN HPA 1021.8 1027.7 1019.9 1019.1 1014.1 1008.6 1001.1 1004.3 1011.6 1018.5 1028.2 1029.7 1029.7 DAY-HOUR 1- 6 8- 6 17- 6 6- 6 18- 6 3- 6 6- 6 29- 6 30- 6 24- 6 28- 6 18- 6 MIN. QNH PRESSURE IN HPA 1009.7 1009.3 1001.7 1002.6 997.8 992.3 991.3 993.0 998.2 1006.7 1006.8 1009.0 991.3 DAY-HOUR 13- 6 15- 3 31-15 16-12 13- 0 19-15 10-15 3- 0 1-12 8-12 23- 0 25-12 MEAN QFF PRESSURE IN HPA 1016.3 1019.0 1014.8 1010.6 1005.6 1000.4 997.4 998.8 1005.3 1012.6 1016.9 1019.9 1009.8 MAX. QFF PRESSURE IN HPA 1022.2 1028.1 1020.2 1019.4 1014.4 1008.9 1001.4 1004.6 1011.9 1018.8 1028.6 1030.1 1030.1 DAY-HOUR 1- 6 8- 6 17- 6 6- 6 18- 6 3- 6 6- 6 29- 6 30- 6 24- 6 28- 6 18- 6 MIN. QFF PRESSURE IN HPA 1010.0 1009.6 1002.0 1002.9 998.1 992.6 991.5 993.2 998.5 1007.0 1007.1 1009.3 991.5 DAY-HOUR 13- 6 15- 3 31-15 16-12 13- 0 19-15 10-15 3- 0 1-12 8-12 23- 0 25-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1015.3 1017.9 1013.5 1009.4 1004.3 999.3 996.1 997.4 1003.9 1011.2 1015.6 1018.7 1008.5 MAX. QFE PRESSURE IN HPA 1020.8 1024.8 1018.0 1016.4 1011.7 1006.4 998.6 1000.8 1008.5 1016.0 1025.9 1026.6 1026.6 DAY 1 9 17 6 18 3 27 24 27 24 29 18 MIN. QFE PRESSURE IN HPA 1010.0 1010.3 1005.6 1002.0 997.2 992.7 991.6 992.4 998.9 1006.7 1006.2 1013.1 991.6 DAY 23 15 31 17 13 20 11 3 1 8 23 26 MEAN QNH PRESSURE IN HPA 1015.9 1018.5 1014.2 1010.0 1004.9 999.9 996.7 998.0 1004.5 1011.8 1016.3 1019.4 1009.2 MAX. QNH PRESSURE IN HPA 1021.4 1025.4 1018.6 1017.0 1012.3 1007.0 999.2 1001.4 1009.1 1016.6 1026.5 1027.2 1027.2 DAY 1 9 17 6 18 3 27 24 27 24 29 18 MIN. QNH PRESSURE IN HPA 1010.6 1010.9 1006.2 1002.6 997.8 993.3 992.2 993.0 999.5 1007.3 1006.8 1013.7 992.2 DAY 23 15 31 17 13 20 11 3 1 8 23 26 MEAN QFF PRESSURE IN HPA 1016.2 1018.8 1014.4 1010.2 1005.1 1000.2 997.0 998.2 1004.7 1012.1 1016.6 1019.7 1009.4 MAX. QFF PRESSURE IN HPA 1021.8 1025.7 1018.9 1017.3 1012.6 1007.3 999.4 1001.7 1009.4 1016.9 1026.9 1027.6 1027.6 DAY 1 9 17 6 18 3 27 29 27 24 29 18 MIN. QFF PRESSURE IN HPA 1010.9 1011.2 1006.5 1002.9 998.1 993.5 992.4 993.2 999.8 1007.6 1007.1 1014.0 992.4 DAY 23 15 31 17 13 20 11 3 1 8 23 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1015.3 1017.9 1014.0 1009.8 1005.1 999.9 996.9 998.1 1004.7 1011.9 1016.1 1018.8 1009.0 MAX. QFE PRESSURE IN HPA 1020.1 1025.2 1018.0 1017.1 1012.6 1006.9 999.5 1002.1 1009.3 1016.5 1026.3 1027.6 1027.6 DAY 1 8 9 6 18 3 6 29 27 24 29 18 MIN. QFE PRESSURE IN HPA 1009.2 1008.7 1005.3 1003.4 998.0 993.5 991.9 993.3 999.0 1006.7 1007.8 1012.3 991.9 DAY 13 15 31 23 13 20 11 3 1 8 18 9 MEAN QNH PRESSURE IN HPA 1015.9 1018.5 1014.7 1010.4 1005.7 1000.5 997.5 998.7 1005.3 1012.5 1016.7 1019.4 1009.7 MAX. QNH PRESSURE IN HPA 1020.7 1025.8 1018.6 1017.7 1013.2 1007.5 1000.1 1002.7 1009.9 1017.1 1026.9 1028.2 1028.2 DAY 1 8 9 6 18 3 6 29 27 24 29 18 MIN. QNH PRESSURE IN HPA 1009.8 1009.3 1005.9 1004.0 998.6 994.1 992.5 993.9 999.6 1007.3 1008.4 1012.9 992.5 DAY 13 15 31 23 13 20 11 3 1 8 18 9 MEAN QFF PRESSURE IN HPA 1016.2 1018.8 1014.9 1010.7 1005.9 1000.7 997.7 998.9 1005.6 1012.8 1017.0 1019.8 1009.9 MAX. QFF PRESSURE IN HPA 1021.1 1026.1 1018.9 1018.0 1013.5 1007.8 1000.4 1003.0 1010.2 1017.4 1027.3 1028.6 1028.6 DAY 1 8 17 6 18 3 6 29 27 24 29 18 MIN. QFF PRESSURE IN HPA 1010.1 1009.6 1006.2 1004.3 998.9 994.3 992.7 994.1 999.9 1007.6 1008.7 1013.2 992.7 DAY 13 15 31 23 13 20 11 3 1 8 18 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1016.6 1019.3 1015.5 1011.1 1005.9 1000.7 997.9 999.1 1006.0 1013.4 1017.4 1020.1 1010.3 MAX. QFE PRESSURE IN HPA 1021.2 1027.1 1019.3 1018.5 1013.5 1008.0 1000.5 1003.7 1011.0 1017.9 1027.6 1029.1 1029.1 DAY 1 8 17 6 18 3 6 29 30 24 28 18 MIN. QFE PRESSURE IN HPA 1009.1 1010.9 1005.5 1005.0 1000.1 994.7 992.6 994.2 1000.0 1008.5 1008.5 1012.5 992.6 DAY 13 14 31 20 13 15 11 3 1 8 18 25 MEAN QNH PRESSURE IN HPA 1017.3 1019.9 1016.1 1011.7 1006.6 1001.4 998.5 999.8 1006.6 1014.0 1018.1 1020.8 1010.9 MAX. QNH PRESSURE IN HPA 1021.8 1027.7 1019.9 1019.1 1014.1 1008.6 1001.1 1004.3 1011.6 1018.5 1028.2 1029.7 1029.7 DAY 1 8 17 6 18 3 6 29 30 24 28 18 MIN. QNH PRESSURE IN HPA 1009.7 1011.5 1006.1 1005.6 1000.7 995.3 993.2 994.8 1000.6 1009.1 1009.1 1013.1 993.2 DAY 13 14 31 20 13 15 11 3 1 8 18 25 MEAN QFF PRESSURE IN HPA 1017.6 1020.2 1016.4 1012.0 1006.8 1001.6 998.7 1000.0 1006.9 1014.3 1018.4 1021.1 1011.2 MAX. QFF PRESSURE IN HPA 1022.2 1028.1 1020.2 1019.4 1014.4 1008.9 1001.4 1004.6 1011.9 1018.8 1028.6 1030.1 1030.1 DAY 1 8 17 6 18 3 6 29 30 24 28 18 MIN. QFF PRESSURE IN HPA 1010.0 1011.8 1006.4 1005.9 1001.0 995.6 993.4 995.0 1000.9 1009.4 1009.4 1013.4 993.4 DAY 13 14 31 20 13 15 11 3 1 8 18 25 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1016.1 1019.0 1015.1 1010.7 1005.6 1000.2 997.4 998.7 1005.3 1012.5 1016.4 1019.4 1009.7 MAX. QFE PRESSURE IN HPA 1020.7 1027.0 1019.1 1017.6 1012.9 1007.5 999.8 1003.2 1010.6 1016.9 1026.6 1028.1 1028.1 DAY 16 8 8 6 18 3 6 29 30 23 28 18 MIN. QFE PRESSURE IN HPA 1010.1 1010.3 1004.8 1003.9 1000.4 993.9 992.7 993.8 999.3 1007.7 1007.7 1010.7 992.7 DAY 13 14 31 20 15 19 11 3 1 8 18 25 MEAN QNH PRESSURE IN HPA 1016.7 1019.7 1015.7 1011.3 1006.2 1000.8 998.1 999.3 1005.9 1013.1 1017.1 1020.1 1010.3 MAX. QNH PRESSURE IN HPA 1021.3 1027.6 1019.7 1018.2 1013.5 1008.1 1000.4 1003.8 1011.2 1017.5 1027.2 1028.7 1028.7 DAY 16 8 8 6 18 3 6 29 30 23 28 18 MIN. QNH PRESSURE IN HPA 1010.7 1010.9 1005.4 1004.5 1001.0 994.5 993.3 994.4 999.9 1008.3 1008.3 1011.3 993.3 DAY 13 14 31 20 15 19 11 3 1 8 18 25 MEAN QFF PRESSURE IN HPA 1017.0 1020.0 1016.0 1011.5 1006.5 1001.0 998.3 999.6 1006.2 1013.3 1017.3 1020.4 1010.6 MAX. QFF PRESSURE IN HPA 1021.6 1027.9 1020.0 1018.5 1013.8 1008.4 1000.7 1004.1 1011.5 1017.8 1027.6 1029.1 1029.1 DAY 16 8 8 6 18 3 6 29 30 24 28 18 MIN. QFF PRESSURE IN HPA 1011.0 1011.2 1005.7 1004.8 1001.3 994.7 993.5 994.6 1000.2 1008.6 1008.6 1011.6 993.5 DAY 13 14 31 20 15 19 11 3 1 8 18 25 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1014.6 1017.2 1013.1 1009.0 1004.1 998.8 996.1 997.2 1003.7 1010.8 1015.0 1018.0 1008.1 MAX. QFE PRESSURE IN HPA 1019.6 1025.9 1017.9 1014.9 1011.3 1006.7 998.6 1001.4 1008.4 1015.2 1025.4 1026.9 1026.9 DAY 16 8 8 6 18 2 13 23 30 24 28 18 MIN. QFE PRESSURE IN HPA 1009.1 1008.9 1002.4 1002.0 998.1 992.4 991.4 993.4 997.6 1006.1 1007.2 1008.4 991.4 DAY 23 14 31 16 15 19 11 3 1 8 18 25 MEAN QNH PRESSURE IN HPA 1015.2 1017.9 1013.8 1009.6 1004.7 999.4 996.7 997.9 1004.3 1011.5 1015.7 1018.7 1008.8 MAX. QNH PRESSURE IN HPA 1020.2 1026.5 1018.5 1015.5 1011.9 1007.3 999.2 1002.0 1009.0 1015.8 1026.0 1027.5 1027.5 DAY 16 8 8 6 18 2 13 23 30 24 28 18 MIN. QNH PRESSURE IN HPA 1009.7 1009.5 1003.0 1002.6 998.7 993.0 992.0 994.0 998.2 1006.7 1007.8 1009.0 992.0 DAY 23 14 31 16 15 19 11 3 1 8 18 25 MEAN QFF PRESSURE IN HPA 1015.5 1018.2 1014.0 1009.9 1005.0 999.6 996.9 998.1 1004.6 1011.7 1016.0 1019.0 1009.0 MAX. QFF PRESSURE IN HPA 1020.5 1026.8 1018.8 1015.8 1012.2 1007.6 999.5 1002.3 1009.3 1016.1 1026.3 1027.9 1027.9 DAY 16 8 8 6 18 2 13 23 30 24 28 18 MIN. QFF PRESSURE IN HPA 1010.0 1009.8 1003.3 1002.9 999.0 993.2 992.2 994.2 998.5 1007.0 1008.1 1009.3 992.2 DAY 23 14 31 16 15 19 11 3 1 8 18 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1014.8 1017.1 1012.7 1008.5 1003.5 998.4 995.4 996.9 1003.4 1010.8 1015.4 1018.5 1008.0 MAX. QFE PRESSURE IN HPA 1019.6 1025.0 1017.4 1014.5 1010.7 1005.6 997.4 1001.1 1008.4 1015.7 1025.5 1027.2 1027.2 DAY 16 8 8 5 18 2 23 29 30 23 28 18 MIN. QFE PRESSURE IN HPA 1009.6 1009.1 1001.1 1002.8 997.3 991.7 990.7 992.7 997.6 1006.2 1008.7 1009.2 990.7 DAY 23 14 31 16 12 19 10 2 1 8 18 25 MEAN QNH PRESSURE IN HPA 1015.4 1017.8 1013.4 1009.1 1004.2 999.0 996.0 997.5 1004.1 1011.4 1016.0 1019.1 1008.6 MAX. QNH PRESSURE IN HPA 1020.2 1025.6 1018.0 1015.1 1011.3 1006.2 998.0 1001.7 1009.0 1016.3 1026.1 1027.8 1027.8 DAY 16 8 8 5 18 2 23 29 30 23 28 18 MIN. QNH PRESSURE IN HPA 1010.2 1009.7 1001.7 1003.4 997.9 992.3 991.3 993.3 998.2 1006.8 1009.3 1009.8 991.3 DAY 23 14 31 16 12 19 10 2 1 8 18 25 MEAN QFF PRESSURE IN HPA 1015.7 1018.1 1013.6 1009.4 1004.4 999.2 996.2 997.8 1004.3 1011.7 1016.3 1019.4 1008.9 MAX. QFF PRESSURE IN HPA 1020.5 1025.9 1018.3 1015.4 1011.6 1006.5 998.2 1002.0 1009.3 1016.6 1026.5 1028.2 1028.2 DAY 16 8 8 5 18 2 23 29 30 23 28 18 MIN. QFF PRESSURE IN HPA 1010.5 1010.0 1002.0 1003.7 998.2 992.6 991.5 993.6 998.5 1007.1 1009.6 1010.1 991.5 DAY 23 14 31 16 12 19 10 2 1 8 18 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1015.4 1018.2 1013.6 1009.5 1004.7 999.5 996.4 998.2 1004.4 1011.7 1016.3 1019.1 1008.9 MAX. QFE PRESSURE IN HPA 1019.6 1025.6 1018.3 1016.4 1011.2 1006.7 998.8 1002.3 1009.7 1016.7 1025.8 1026.6 1026.6 DAY 16 8 16 5 18 2 24 23 30 23 28 18 MIN. QFE PRESSURE IN HPA 1010.7 1010.7 1002.7 1004.1 998.6 992.8 991.7 993.2 998.6 1007.2 1010.4 1011.7 991.7 DAY 23 14 31 16 12 19 10 2 1 8 22 25 MEAN QNH PRESSURE IN HPA 1016.1 1018.8 1014.2 1010.1 1005.3 1000.2 997.0 998.8 1005.1 1012.4 1017.0 1019.7 1009.5 MAX. QNH PRESSURE IN HPA 1020.2 1026.2 1018.9 1017.0 1011.8 1007.3 999.4 1002.9 1010.3 1017.3 1026.4 1027.2 1027.2 DAY 16 8 16 5 18 2 24 23 30 23 28 18 MIN. QNH PRESSURE IN HPA 1011.3 1011.3 1003.3 1004.7 999.2 993.4 992.3 993.8 999.2 1007.8 1011.0 1012.3 992.3 DAY 23 14 31 16 12 19 10 2 1 8 22 25 MEAN QFF PRESSURE IN HPA 1016.4 1019.1 1014.5 1010.4 1005.6 1000.4 997.3 999.0 1005.3 1012.6 1017.2 1020.0 1009.8 MAX. QFF PRESSURE IN HPA 1020.5 1026.5 1019.2 1017.3 1012.1 1007.6 999.6 1003.2 1010.6 1017.6 1026.8 1027.6 1027.6 DAY 16 8 16 5 18 2 24 23 30 23 28 18 MIN. QFF PRESSURE IN HPA 1011.6 1011.6 1003.6 1005.0 999.5 993.6 992.5 994.1 999.5 1008.1 1011.3 1012.6 992.5 DAY 23 14 31 29 12 19 10 2 1 8 22 25 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1015.5 1018.2 1013.6 1010.0 1004.8 999.5 996.5 998.1 1004.5 1011.7 1016.1 1019.0 1009.0 MAX. QFE PRESSURE IN HPA 1018.9 1025.6 1018.3 1017.0 1011.4 1006.7 998.7 1001.8 1010.4 1016.7 1025.8 1026.8 1026.8 DAY 28 8 16 5 17 2 1 23 30 23 28 17 MIN. QFE PRESSURE IN HPA 1010.4 1010.7 1003.7 1003.2 997.9 993.0 992.2 993.2 998.6 1006.7 1008.5 1013.1 992.2 DAY 23 14 31 16 12 19 10 2 1 8 22 25 MEAN QNH PRESSURE IN HPA 1016.1 1018.8 1014.3 1010.6 1005.5 1000.1 997.2 998.7 1005.1 1012.3 1016.7 1019.7 1009.6 MAX. QNH PRESSURE IN HPA 1019.5 1026.2 1018.9 1017.6 1012.0 1007.3 999.3 1002.4 1011.0 1017.3 1026.4 1027.4 1027.4 DAY 28 8 16 5 17 2 1 23 30 23 28 17 MIN. QNH PRESSURE IN HPA 1011.0 1011.3 1004.3 1003.8 998.5 993.6 992.8 993.8 999.2 1007.3 1009.1 1013.7 992.8 DAY 23 14 31 16 12 19 10 2 1 8 22 25 MEAN QFF PRESSURE IN HPA 1016.4 1019.1 1014.5 1010.9 1005.7 1000.3 997.4 998.9 1005.3 1012.6 1017.0 1020.0 1009.8 MAX. QFF PRESSURE IN HPA 1019.8 1026.5 1019.2 1017.9 1012.3 1007.6 999.6 1002.6 1011.3 1017.6 1026.8 1027.8 1027.8 DAY 28 8 16 5 17 2 1 23 30 23 28 17 MIN. QFF PRESSURE IN HPA 1011.3 1011.6 1004.6 1004.1 998.8 993.8 993.0 994.0 999.5 1007.6 1009.4 1014.0 993.0 DAY 23 14 31 16 12 19 10 2 1 8 22 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.9 12.9 17.8 24.8 30.8 34.6 37.3 36.0 30.8 25.9 17.5 14.6 24.5 MINIMUN AIR TEMPERATURE (C) 6.2 7.2 11.6 17.2 22.1 23.7 27.4 26.1 20.2 17.2 10.8 8.9 16.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 4 19 28 31 31 7 3 1 0 124 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 2.2 0.4 5.4 10.0 13.4 20.0 22.2 22.4 17.2 6.4 4.4 1.0 0.4 DAY 13 12 25 8 6 8 3 23 7 25 26 28 MAXIMUM AIR TEMPERATURE (C) 16.3 19.4 24.5 32.6 39.0 44.7 47.0 45.7 42.1 36.1 25.9 22.1 33.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 24 29 30 31 31 30 27 5 0 209 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 25.4 32.4 41.0 43.4 49.4 50.4 50.4 46.6 42.4 35.0 28.0 50.4 DAY 31 28 31 23 28 17 17 16 11 11 1 9 DIF. BETWEEN (MAX.-MIN.) (C) 10.1 12.2 12.9 15.4 16.9 21.0 19.6 19.6 21.9 18.9 15.1 13.2 16.5 MEAN DAILY TEMP. (MDT) (C) 11.3 13.3 18.0 24.9 30.5 34.2 37.2 35.9 31.1 26.7 18.4 15.5 24.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 6.5 126.7 296.3 395.7 502.6 461.6 304.1 184.9 18.4 0.0 2296.8 HEATING DEG. DAYS(BASE 18 0C) 208.8 131.3 34.5 0.2 0.0 0.0 0.0 0.0 0.0 0.0 31.9 81.3 488.0 DEWPOINT (MEAN C) 6.9 5.9 7.9 10.1 7.2 5.5 10.8 9.9 7.8 5.7 6.2 7.3 7.6 MIXING RATIO (G/KG) 6.23 5.91 6.91 8.08 6.65 5.95 8.65 7.92 6.80 6.10 6.13 6.54 6.82 VAPOUR PRESSURE (HPA) 10.09 9.55 11.13 12.94 10.62 9.46 13.64 12.54 10.85 9.81 9.90 10.57 10.93 SATURATION DEF. (HPA) 3.29 6.10 10.21 20.30 36.64 49.21 53.61 50.24 37.04 26.53 11.24 6.95 25.95 RELATIVE HUMIDITY (MEAN %) 78 66 57 45 27 20 24 23 28 31 52 65 43 RELATIVE HUMIDITY (MAX. %) 94 88 80 71 50 40 41 40 47 49 71 84 63 RELATIVE HUMIDITY (MIN. %) 54 37 32 20 11 7 11 10 10 13 29 40 23 RELATIVE HUMIDITY (MEAN% 03UTC) 91 85 78 66 45 38 39 39 46 48 68 79 60 RELATIVE HUMIDITY (MEAN% 09UTC) 67 47 40 27 15 9 14 14 15 18 38 50 30 RELATIVE HUMIDITY (MEAN% 15UTC) 70 54 46 34 15 10 15 14 17 24 46 61 34 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 49.8 6.1 51.2 5.7 0.0 0.0 0.0 0.0 0.0 0.0 1.4 44.0 158.2 DAYS WITH PRECIPITATION >=10 1 0 2 0 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 4 0 2 0 0 0 0 0 0 0 0 3 9 DAYS WITH PRECIPITATION >= 1 5 2 3 2 0 0 0 0 0 0 1 5 18 DAYS WITH PRECIPITATION 6 4 5 2 0 0 0 0 0 0 3 6 26 GREATEST DAILY PRECIPITATION 24.4 4.1 28.0 4.3 0.0 0.0 0.0 0.0 0.0 0.0 1.2 23.0 28.0 DAY 22 9 12 26 ** ** ** ** ** ** 16 25 DAY WITH THUNDER STORM 1 0 3 0 2 0 0 0 0 0 2 3 11 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 3 4 6 8 15 17 20 11 8 3 1 1 97 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.1 8.1 9.5 8.8 10.8 11.6 11.7 10.8 9.2 9.5 8.7 7.4 9.8 PREVAILING WIND PERCENT 26.6 18.3 32.3 22.5 23.4 51.3 52.0 49.6 34.6 23.4 26.7 29.0 32.6 CALMS PERCENT OF WIND 8.5 6.3 16.5 12.9 16.1 8.3 4.8 9.7 26.3 25.8 27.1 32.3 16.3 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 297 246 297 255 270 283 274 281 283 285 289 290 281 VECTOR WIND MAGNITUDE(KNOTS) 1.2 0.4 2.0 0.7 2.5 8.4 7.9 6.8 5.1 1.9 2.8 1.7 3.4 WIND STEADINESES (MEAN %) 17.9 5.8 27.4 9.6 32.9 87.5 80.6 80.0 79.7 31.7 51.9 34.7 47.2 WIND SPEED (MEAN KNOTS) 6.7 6.9 7.3 7.3 7.6 9.6 9.8 8.5 6.4 6.0 5.4 4.9 7.2 FASTEST WIND DIRECTION 300 120 280 340 250 280 280 290 290 300 140 120 340 FASTEST WIND SPEED (KNOTS) 19 29 23 31 29 29 29 29 29 25 21 19 31 DAY 19 1 24 15 1 18 1 7 27 21 5 17 DAYS WITH SKY CLEAR (0-2)/8 18 16 18 18 23 30 27 29 30 26 18 15 268 DAYS WITH P.CLOUDY (3-6)/8 9 9 7 8 8 0 2 0 0 5 10 11 69 DAYS WITH CLOUDY (7-8)/8 4 3 6 4 0 0 0 0 0 0 2 5 24 DAYS WITH VISIBILITY =< 2 KM 8 3 1 1 2 4 4 3 0 1 3 6 36 DURATION OF SUNSHINE HOURS 195.6 215.1 247.7 264.0 315.8 354.5 322.2 314.5 323.5 291.9 217.5 183.1 3245.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.9 1015.7 1013.8 1010.7 1005.3 999.2 996.1 997.7 1003.4 1011.8 1016.0 1017.3 1008.8 MAX. QFE PRESSURE IN HPA 1024.5 1023.7 1020.1 1019.4 1010.6 1007.0 1001.4 1002.5 1010.9 1019.2 1023.5 1026.2 1026.2 DAY-HOUR 13- 6 14-21 6- 6 5- 6 6- 6 1- 6 19- 6 29-18 30-21 23- 6 23- 6 27- 6 MIN. QFE PRESSURE IN HPA 1007.3 1008.5 1002.4 1003.3 999.7 992.6 991.5 992.3 997.0 1005.8 1007.8 1008.0 991.5 DAY-HOUR 22-21 28-15 23-18 25-15 3- 0 19-12 5-15 7-15 11-15 4-12 5-12 23-12 MEAN QNH PRESSURE IN HPA 1018.6 1016.4 1014.5 1011.3 1005.9 999.9 996.7 998.4 1004.1 1012.5 1016.7 1018.0 1009.4 MAX. QNH PRESSURE IN HPA 1025.1 1024.3 1020.7 1020.0 1011.2 1007.6 1002.0 1003.1 1011.5 1019.8 1024.1 1026.8 1026.8 DAY-HOUR 13- 6 14-21 6- 6 5- 6 6- 6 1- 6 19- 6 29-18 30-21 23- 6 23- 6 27- 6 MIN. QNH PRESSURE IN HPA 1007.9 1009.1 1003.0 1003.9 1000.3 993.2 992.1 992.9 997.6 1006.4 1008.4 1008.6 992.1 DAY-HOUR 22-21 28-15 23-18 25-15 3- 0 19-12 5-15 7-15 11-15 4-12 5-12 23-12 MEAN QFF PRESSURE IN HPA 1018.9 1016.7 1014.7 1011.6 1006.2 1000.1 996.9 998.6 1004.3 1012.7 1017.0 1018.3 1009.7 MAX. QFF PRESSURE IN HPA 1025.5 1024.7 1021.0 1020.3 1011.5 1007.9 1002.2 1003.4 1011.8 1020.1 1024.4 1027.2 1027.2 DAY-HOUR 13- 6 14-21 6- 6 5- 6 6- 6 1- 6 19- 6 29-18 30-21 23- 6 23- 6 27- 6 MIN. QFF PRESSURE IN HPA 1008.2 1009.4 1003.3 1004.2 1000.6 993.4 992.3 993.1 997.9 1006.7 1008.7 1008.9 992.3 DAY-HOUR 22-21 28-15 23-18 25-15 3- 0 19-12 5-15 7-15 11-15 4-12 5-12 23-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1015.6 1013.5 1010.2 1004.6 999.1 995.6 997.2 1002.7 1011.3 1015.9 1017.2 1008.4 MAX. QFE PRESSURE IN HPA 1023.0 1021.0 1018.0 1018.4 1009.2 1005.4 998.6 1001.2 1007.0 1017.7 1020.4 1025.2 1025.2 DAY 13 15 6 5 7 1 16 30 30 23 23 27 MIN. QFE PRESSURE IN HPA 1008.3 1011.0 1005.8 1004.0 999.7 994.2 992.8 992.8 998.0 1006.1 1010.1 1009.9 992.8 DAY 23 28 24 30 3 20 6 7 12 4 8 24 MEAN QNH PRESSURE IN HPA 1018.5 1016.3 1014.1 1010.8 1005.3 999.7 996.2 997.8 1003.3 1011.9 1016.6 1017.8 1009.0 MAX. QNH PRESSURE IN HPA 1023.6 1021.6 1018.6 1019.0 1009.8 1006.0 999.2 1001.8 1007.6 1018.3 1021.0 1025.8 1025.8 DAY 13 15 6 5 7 1 16 30 30 23 23 27 MIN. QNH PRESSURE IN HPA 1008.9 1011.6 1006.4 1004.6 1000.3 994.8 993.4 993.4 998.6 1006.7 1010.7 1010.5 993.4 DAY 23 28 24 30 3 20 6 7 12 4 8 24 MEAN QFF PRESSURE IN HPA 1018.8 1016.6 1014.4 1011.1 1005.5 999.9 996.4 998.0 1003.6 1012.2 1016.9 1018.1 1009.3 MAX. QFF PRESSURE IN HPA 1024.0 1022.0 1018.9 1019.3 1010.1 1006.3 999.4 1002.1 1007.9 1018.6 1021.3 1026.2 1026.2 DAY 13 15 6 5 7 1 16 30 30 23 23 27 MIN. QFF PRESSURE IN HPA 1009.2 1011.9 1006.7 1004.9 1000.6 995.0 993.6 993.6 998.8 1007.0 1011.0 1010.8 993.6 DAY 23 28 24 30 3 20 6 7 12 20 8 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1015.8 1013.9 1010.9 1005.6 999.7 996.4 997.9 1003.6 1012.1 1016.3 1017.3 1009.0 MAX. QFE PRESSURE IN HPA 1023.2 1021.3 1018.5 1018.4 1009.4 1006.4 1000.0 1001.5 1008.0 1017.9 1021.5 1025.6 1025.6 DAY 13 16 6 5 6 1 19 28 30 23 23 27 MIN. QFE PRESSURE IN HPA 1008.3 1010.6 1006.6 1005.5 1001.5 994.3 993.5 993.0 999.2 1006.3 1009.9 1011.1 993.0 DAY 3 7 24 30 3 19 5 7 11 4 8 24 MEAN QNH PRESSURE IN HPA 1018.6 1016.5 1014.6 1011.5 1006.2 1000.3 997.0 998.5 1004.3 1012.7 1017.0 1017.9 1009.6 MAX. QNH PRESSURE IN HPA 1023.8 1021.9 1019.1 1019.0 1010.0 1007.0 1000.6 1002.1 1008.6 1018.5 1022.1 1026.2 1026.2 DAY 13 16 6 5 6 1 19 28 30 23 23 27 MIN. QNH PRESSURE IN HPA 1008.9 1011.2 1007.2 1006.1 1002.1 994.9 994.1 993.6 999.8 1006.9 1010.5 1011.7 993.6 DAY 3 7 24 30 3 19 5 7 11 4 8 24 MEAN QFF PRESSURE IN HPA 1018.9 1016.8 1014.9 1011.8 1006.5 1000.5 997.3 998.8 1004.5 1013.0 1017.3 1018.2 1009.9 MAX. QFF PRESSURE IN HPA 1024.2 1022.3 1019.4 1019.3 1010.3 1007.3 1000.8 1002.4 1008.9 1018.8 1022.4 1026.6 1026.6 DAY 13 16 6 5 6 1 19 28 30 23 23 27 MIN. QFF PRESSURE IN HPA 1009.2 1011.5 1007.5 1006.4 1002.4 995.2 994.3 993.9 1000.1 1007.2 1010.8 1012.0 993.9 DAY 3 7 24 30 3 19 5 7 11 4 8 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.3 1017.1 1015.3 1012.2 1006.7 1000.4 997.3 999.1 1004.8 1013.5 1017.5 1018.8 1010.2 MAX. QFE PRESSURE IN HPA 1024.5 1023.2 1020.1 1019.4 1010.6 1007.0 1001.4 1002.3 1009.5 1019.2 1023.5 1026.2 1026.2 DAY 13 14 6 5 6 1 19 27 30 23 23 27 MIN. QFE PRESSURE IN HPA 1009.6 1011.9 1009.1 1006.6 1003.6 994.8 993.7 993.7 1000.5 1007.5 1011.8 1011.9 993.7 DAY 3 4 24 30 3 19 5 7 11 4 8 23 MEAN QNH PRESSURE IN HPA 1020.0 1017.7 1015.9 1012.9 1007.3 1001.0 997.9 999.7 1005.5 1014.1 1018.2 1019.5 1010.8 MAX. QNH PRESSURE IN HPA 1025.1 1023.8 1020.7 1020.0 1011.2 1007.6 1002.0 1002.9 1010.1 1019.8 1024.1 1026.8 1026.8 DAY 13 14 6 5 6 1 19 27 30 23 23 27 MIN. QNH PRESSURE IN HPA 1010.2 1012.5 1009.7 1007.2 1004.2 995.4 994.3 994.3 1001.1 1008.1 1012.4 1012.5 994.3 DAY 3 4 24 30 3 19 5 7 11 4 8 23 MEAN QFF PRESSURE IN HPA 1020.3 1018.0 1016.2 1013.1 1007.6 1001.2 998.1 999.9 1005.7 1014.3 1018.5 1019.8 1011.1 MAX. QFF PRESSURE IN HPA 1025.5 1024.2 1021.0 1020.3 1011.5 1007.9 1002.2 1003.2 1010.4 1020.1 1024.4 1027.2 1027.2 DAY 13 14 6 5 6 1 19 27 30 23 23 27 MIN. QFF PRESSURE IN HPA 1010.5 1012.8 1010.0 1007.5 1004.5 995.7 994.5 994.5 1001.4 1008.4 1012.7 1012.8 994.5 DAY 3 4 24 30 3 19 5 7 11 4 8 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.5 1016.4 1014.9 1011.8 1006.2 999.9 996.9 998.6 1004.2 1012.6 1016.5 1017.8 1009.5 MAX. QFE PRESSURE IN HPA 1024.2 1023.4 1019.9 1019.1 1010.6 1006.7 1001.4 1002.0 1009.3 1018.2 1022.3 1024.8 1024.8 DAY 21 14 6 5 6 1 19 27 30 22 23 27 MIN. QFE PRESSURE IN HPA 1009.1 1010.8 1007.7 1005.8 1003.0 993.4 992.9 993.5 999.6 1007.5 1010.1 1010.7 992.9 DAY 3 4 23 29 24 19 5 7 11 4 5 23 MEAN QNH PRESSURE IN HPA 1019.2 1017.0 1015.5 1012.4 1006.8 1000.5 997.6 999.2 1004.8 1013.2 1017.1 1018.4 1010.1 MAX. QNH PRESSURE IN HPA 1024.8 1024.0 1020.5 1019.7 1011.2 1007.3 1002.0 1002.6 1009.9 1018.8 1022.9 1025.4 1025.4 DAY 21 14 6 5 6 1 19 27 30 22 23 27 MIN. QNH PRESSURE IN HPA 1009.7 1011.4 1008.3 1006.4 1003.6 994.0 993.5 994.1 1000.2 1008.1 1010.7 1011.3 993.5 DAY 3 4 23 29 24 19 5 7 11 4 5 23 MEAN QFF PRESSURE IN HPA 1019.5 1017.3 1015.8 1012.7 1007.1 1000.7 997.8 999.4 1005.0 1013.4 1017.4 1018.7 1010.4 MAX. QFF PRESSURE IN HPA 1025.1 1024.4 1020.8 1020.0 1011.5 1007.6 1002.2 1002.8 1010.2 1019.1 1023.2 1025.8 1025.8 DAY 21 14 6 5 6 1 19 27 30 23 23 27 MIN. QFF PRESSURE IN HPA 1010.0 1011.7 1008.6 1006.7 1003.9 994.2 993.7 994.3 1000.5 1008.4 1011.0 1011.6 993.7 DAY 3 4 23 29 24 19 5 7 11 4 5 23 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.0 1014.7 1013.0 1010.0 1004.7 998.6 995.4 997.1 1002.6 1011.0 1014.9 1016.2 1007.9 MAX. QFE PRESSURE IN HPA 1022.0 1022.2 1018.1 1017.2 1009.8 1005.3 999.6 1000.6 1008.1 1016.7 1021.1 1023.3 1023.3 DAY 12 14 6 5 6 1 19 29 30 22 23 27 MIN. QFE PRESSURE IN HPA 1009.4 1008.8 1004.1 1004.0 1001.8 992.6 991.9 992.5 997.4 1005.8 1007.8 1008.0 991.9 DAY 3 4 23 25 18 19 5 7 11 4 5 23 MEAN QNH PRESSURE IN HPA 1017.6 1015.4 1013.6 1010.6 1005.3 999.2 996.0 997.8 1003.2 1011.7 1015.6 1016.9 1008.6 MAX. QNH PRESSURE IN HPA 1022.6 1022.8 1018.7 1017.8 1010.4 1005.9 1000.2 1001.2 1008.7 1017.3 1021.7 1023.9 1023.9 DAY 12 14 6 5 6 1 19 29 30 22 23 27 MIN. QNH PRESSURE IN HPA 1010.0 1009.4 1004.7 1004.6 1002.4 993.2 992.5 993.1 998.0 1006.4 1008.4 1008.6 992.5 DAY 3 4 23 25 18 19 5 7 11 4 5 23 MEAN QFF PRESSURE IN HPA 1017.9 1015.7 1013.9 1010.9 1005.5 999.4 996.2 998.0 1003.5 1011.9 1015.8 1017.2 1008.8 MAX. QFF PRESSURE IN HPA 1023.0 1023.2 1019.0 1018.1 1010.7 1006.2 1000.4 1001.4 1009.0 1017.6 1022.0 1024.3 1024.3 DAY 13 14 6 5 6 1 19 29 30 22 23 27 MIN. QFF PRESSURE IN HPA 1010.3 1009.7 1005.0 1004.9 1002.7 993.4 992.7 993.3 998.3 1006.7 1008.7 1008.9 992.7 DAY 3 4 23 25 18 19 5 7 11 4 5 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1017.2 1014.8 1012.7 1009.5 1004.1 998.1 994.9 996.7 1002.5 1011.0 1015.2 1016.7 1007.8 MAX. QFE PRESSURE IN HPA 1022.9 1021.5 1017.2 1016.3 1009.1 1004.9 998.7 1001.0 1008.7 1017.1 1020.9 1023.8 1023.8 DAY 12 14 6 4 6 1 19 29 30 22 23 27 MIN. QFE PRESSURE IN HPA 1011.7 1008.5 1003.0 1003.3 1000.6 993.1 991.5 992.3 997.0 1005.8 1009.2 1008.8 991.5 DAY 19 28 23 25 24 19 5 7 11 4 5 23 MEAN QNH PRESSURE IN HPA 1017.9 1015.4 1013.3 1010.1 1004.7 998.7 995.5 997.4 1003.1 1011.6 1015.8 1017.3 1008.4 MAX. QNH PRESSURE IN HPA 1023.5 1022.1 1017.8 1016.9 1009.7 1005.5 999.3 1001.6 1009.3 1017.7 1021.5 1024.4 1024.4 DAY 12 14 6 4 6 1 19 29 30 22 23 27 MIN. QNH PRESSURE IN HPA 1012.3 1009.1 1003.6 1003.9 1001.2 993.7 992.1 992.9 997.6 1006.4 1009.8 1009.4 992.1 DAY 19 28 23 25 24 19 5 7 11 4 5 23 MEAN QFF PRESSURE IN HPA 1018.2 1015.7 1013.6 1010.4 1005.0 998.9 995.8 997.6 1003.4 1011.9 1016.1 1017.6 1008.7 MAX. QFF PRESSURE IN HPA 1023.9 1022.5 1018.1 1017.2 1010.0 1005.8 999.5 1001.9 1009.6 1018.0 1021.8 1024.8 1024.8 DAY 12 14 6 5 6 1 19 29 30 22 23 27 MIN. QFF PRESSURE IN HPA 1012.6 1009.4 1003.9 1004.2 1001.5 994.0 992.3 993.1 997.9 1006.7 1010.1 1009.7 992.3 DAY 19 28 23 25 24 19 5 7 11 4 5 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1015.8 1013.7 1010.6 1005.2 999.2 996.1 997.8 1003.7 1011.8 1016.1 1017.4 1008.8 MAX. QFE PRESSURE IN HPA 1023.5 1022.3 1017.8 1018.4 1010.1 1006.2 999.9 1002.5 1010.6 1018.2 1021.3 1024.9 1024.9 DAY 12 14 26 4 6 1 19 29 30 22 23 26 MIN. QFE PRESSURE IN HPA 1010.0 1009.9 1002.4 1004.2 1001.7 994.6 993.1 994.0 999.1 1007.4 1011.3 1010.3 993.1 DAY 22 28 23 25 2 19 5 7 11 4 4 23 MEAN QNH PRESSURE IN HPA 1018.6 1016.4 1014.3 1011.2 1005.9 999.8 996.7 998.4 1004.4 1012.4 1016.7 1018.1 1009.4 MAX. QNH PRESSURE IN HPA 1024.1 1022.9 1018.4 1019.0 1010.7 1006.8 1000.5 1003.1 1011.2 1018.8 1021.9 1025.5 1025.5 DAY 12 14 26 4 6 1 19 29 30 22 23 26 MIN. QNH PRESSURE IN HPA 1010.6 1010.5 1003.0 1004.8 1002.3 995.2 993.7 994.6 999.7 1008.0 1011.9 1010.9 993.7 DAY 22 28 23 25 2 19 5 7 11 4 4 23 MEAN QFF PRESSURE IN HPA 1018.9 1016.7 1014.6 1011.5 1006.1 1000.0 997.0 998.6 1004.6 1012.7 1017.0 1018.4 1009.7 MAX. QFF PRESSURE IN HPA 1024.5 1023.3 1018.7 1019.3 1011.0 1007.1 1000.7 1003.4 1011.5 1019.1 1022.2 1025.9 1025.9 DAY 12 14 26 4 6 1 19 29 30 22 23 26 MIN. QFF PRESSURE IN HPA 1010.9 1010.8 1003.3 1005.1 1002.6 995.5 993.9 994.8 1000.0 1008.3 1012.2 1011.2 993.9 DAY 22 28 23 25 2 19 5 7 11 19 4 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1015.9 1013.8 1010.6 1005.4 999.3 996.0 997.7 1003.4 1011.6 1016.1 1017.3 1008.7 MAX. QFE PRESSURE IN HPA 1023.2 1023.7 1018.0 1018.4 1010.1 1006.2 999.0 1002.2 1010.9 1017.7 1020.7 1025.2 1025.2 DAY 12 14 5 4 6 1 15 29 30 22 23 26 MIN. QFE PRESSURE IN HPA 1007.3 1009.5 1004.8 1004.2 1001.7 994.6 993.4 993.5 998.3 1006.2 1011.3 1009.7 993.4 DAY 22 28 23 29 2 19 5 7 11 19 4 23 MEAN QNH PRESSURE IN HPA 1018.5 1016.5 1014.5 1011.2 1006.0 999.9 996.7 998.3 1004.0 1012.2 1016.7 1018.0 1009.4 MAX. QNH PRESSURE IN HPA 1023.8 1024.3 1018.6 1019.0 1010.7 1006.8 999.6 1002.8 1011.5 1018.3 1021.3 1025.8 1025.8 DAY 12 14 5 4 6 1 15 29 30 22 23 26 MIN. QNH PRESSURE IN HPA 1007.9 1010.1 1005.4 1004.8 1002.3 995.2 994.0 994.1 998.9 1006.8 1011.9 1010.3 994.0 DAY 22 28 23 29 2 19 5 7 11 19 4 23 MEAN QFF PRESSURE IN HPA 1018.8 1016.8 1014.7 1011.5 1006.3 1000.1 996.9 998.6 1004.3 1012.5 1017.0 1018.3 1009.6 MAX. QFF PRESSURE IN HPA 1024.2 1024.7 1018.9 1019.3 1011.0 1007.1 999.8 1003.0 1011.8 1018.6 1021.6 1026.2 1026.2 DAY 12 14 26 4 6 1 15 29 30 22 23 26 MIN. QFF PRESSURE IN HPA 1008.2 1010.4 1005.7 1005.1 1002.6 995.4 994.2 994.3 999.2 1007.1 1012.2 1010.6 994.2 DAY 22 28 23 29 2 19 5 7 11 19 4 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1986-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.5 13.8 18.1 24.7 31.1 34.8 36.8 36.1 32.2 26.9 18.6 13.1 24.8 MINIMUN AIR TEMPERATURE (C) 6.1 7.2 11.2 16.3 20.9 22.9 25.4 24.6 20.4 17.0 11.0 7.5 15.9 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 3.2 15.3 23.3 30.0 28.8 12.5 4.7 0.3 0.0 118.1 DAYS WITH MINIMUM TEMP. <=-4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 DAYS WITH FREEZING MIN.<= 0 1.6 1.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.7 4.0 TEMPERATURE RECORDS LOWEST(C) -4.0 -2.6 0.6 4.0 10.2 15.6 18.0 16.4 12.4 6.4 -3.0 -3.0 -4.0 YEAR-DAY 89- 6 97- 7 97- 8 4- 6 91-12 91- 1 92-13 87-28 91-16 5-25 88-15 90-28 89- 6 MAXIMUM AIR TEMPERATURE (C) 16.9 19.9 24.2 31.5 38.6 43.6 45.6 45.5 42.1 35.7 26.1 19.0 32.4 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 2.2 19.7 30.3 30.0 30.9 30.9 30.0 29.1 5.8 0.0 208.9 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) 27.0 29.6 35.2 42.0 50.2 51.8 51.0 51.4 49.2 43.6 35.6 29.4 51.8 YEAR-DAY 94- 2 97-21 99-31 2-28 99-30 0-30 0- 9 3- 7 99- 3 96- 2 1- 5 98-16 0-30 DIF. BETWEEN (MAX.-MIN.) (C) 10.8 12.7 13.0 15.2 17.7 20.7 20.2 20.9 21.7 18.7 15.1 11.5 16.5 MEAN DAILY TEMP. (MDT) (C) 11.5 13.6 17.7 23.9 29.7 33.3 35.5 35.1 31.2 26.4 18.5 13.2 24.1 STANDARD DEVIATION OF MDT(C) 1.68 1.45 1.38 1.26 1.28 1.26 1.37 1.43 0.87 1.26 0.99 1.65 1.32 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 5.8 91.3 260.4 366.5 449.0 434.7 307.3 167.5 15.8 0.1 2098.4 HEATING DEG. DAYS(BASE 18 0C) 201.5 127.2 39.9 1.2 0.0 0.0 0.0 0.0 0.0 0.0 37.5 150.6 557.9 DEWPOINT (MEAN C) 6.7 5.7 8.0 10.5 10.0 11.3 13.4 13.6 10.8 9.4 7.8 7.6 9.6 MIXING RATIO (G/KG) 6.29 5.95 6.98 8.29 8.26 9.13 10.42 10.65 8.78 7.79 7.01 6.72 8.02 VAPOUR PRESSURE (HPA) 10.17 9.62 11.23 13.26 13.16 14.42 16.37 16.75 13.94 12.49 11.30 10.87 12.80 SATURATION DEF. (HPA) 3.91 6.94 10.49 19.51 34.72 44.90 49.50 47.18 38.04 25.46 11.62 4.93 24.77 RELATIVE HUMIDITY (MEAN %) 75 63 56 46 32 28 29 30 31 38 54 73 46 RELATIVE HUMIDITY (MAX. %) 93 86 80 71 55 48 47 50 52 59 75 90 67 RELATIVE HUMIDITY (MIN. %) 53 38 34 26 17 15 16 16 16 20 33 51 28 RELATIVE HUMIDITY (MEAN% 03UTC) 90 82 77 67 51 45 45 48 50 57 73 87 64 RELATIVE HUMIDITY (MEAN% 09UTC) 66 49 43 32 21 18 20 21 21 26 41 62 35 RELATIVE HUMIDITY (MEAN% 15UTC) 69 53 47 38 25 21 21 23 25 32 49 68 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.1 28.0 35.4 19.1 1.5 0.0 0.0 0.1 0.1 4.4 29.0 44.1 206.8 DAYS WITH PRECIPITATION >=10 1.5 0.9 1.4 0.4 0.0 0.0 0.0 0.0 0.0 0.1 1.0 1.4 6.7 DAYS WITH PRECIPITATION >= 5 2.8 1.6 2.2 1.1 0.0 0.0 0.0 0.0 0.0 0.3 1.5 2.4 11.9 DAYS WITH PRECIPITATION >= 1 5.4 4.0 4.2 2.8 0.5 0.0 0.0 0.1 0.1 1.1 2.7 5.1 26.0 DAYS WITH PRECIPITATION 7.4 5.5 5.9 4.4 1.4 0.1 0.0 0.1 0.1 1.9 3.8 6.8 37.4 GREATEST DAILY PRECIPITATION 79.0 44.0 46.0 69.0 4.0 0.2 0.0 2.0 2.0 10.4 63.0 64.0 79.0 YEAR-DAY 91-14 91-21 94-11 93-26 92- 9 97- 1 **-** 87-11 86- 2 97-20 3-10 0-10 91 DAY WITH THUNDER STORM 1.6 1.3 2.5 3.1 2.0 0.2 0.1 0.0 0.0 1.4 2.2 2.0 16.4 DAYS WITH SNOW OR SLEET 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 DAYS WITH DUST 1.0 3.1 4.2 4.5 7.9 7.1 8.1 6.4 4.5 2.5 1.4 0.6 51.3 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.6 8.2 9.2 9.5 10.0 11.3 11.0 10.2 9.2 8.0 8.1 7.6 9.4 PREVAILING WIND PERCENT 23.8 27.5 21.9 22.2 30.8 41.9 44.8 40.7 34.5 21.2 25.3 27.8 30.4 CALMS PERCENT OF WIND 27.4 23.1 22.7 19.6 21.3 17.8 17.0 16.7 25.8 31.1 26.5 24.9 22.8 NO. OF WIND OBSERVATION 213.7 194.8 214.4 207.9 212.4 209.9 215.0 215.1 208.5 218.6 208.5 215.2 2534.0 VECTOR WIND DIRECTION (MEAN) 301 281 266 269 275 274 267 270 275 283 291 296 275 VECTOR WIND MAGNITUDE(KNOTS) 1.2 1.5 1.0 1.5 4.1 6.7 6.0 5.3 4.1 1.4 1.8 1.6 3.0 WIND STEADINESES (MEAN %) 22.2 25.0 14.7 20.8 55.4 77.9 73.2 69.7 67.2 27.5 31.0 28.6 44.8 WIND SPEED (MEAN KNOTS) 5.4 6.0 6.8 7.2 7.4 8.6 8.2 7.6 6.1 5.1 5.8 5.6 6.7 FASTEST WIND DIRECTION 250 150 140 160 300 300 300 290 270 120 300 120 140 FASTEST WIND SPEED (KNOTS) 39 29 49 35 43 35 39 31 35 29 31 29 49 YEAR-DAY 89- 4 90- 2 97-28 90- 1 89-14 1-20 97-15 96-24 99- 6 89-30 87-11 89-12 97 DAYS WITH SKY CLEAR (0-2)/8 14.4 15.8 14.8 13.2 19.5 27.8 28.5 29.8 28.5 22.9 16.1 13.4 244.7 DAYS WITH P.CLOUDY (3-6)/8 10.3 8.8 10.6 11.7 8.5 1.8 2.0 1.0 1.4 6.1 10.1 10.9 83.2 DAYS WITH CLOUDY (7-8)/8 6.4 3.7 5.6 5.2 2.4 0.4 0.1 0.0 0.0 1.9 3.7 6.6 36.0 DAYS WITH VISIBILITY =< 2 KM 8.8 2.5 2.9 0.6 1.7 1.5 1.4 1.0 1.0 0.8 1.5 8.0 31.7 DURATION OF SUNSHINE HOURS 178.9 200.0 222.1 237.3 282.3 334.7 342.1 342.5 310.4 266.5 218.3 166.3 3101.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1018.2 1016.5 1013.1 1010.0 1005.7 999.7 996.0 998.1 1004.4 1011.4 1016.4 1018.8 1009.0 MAX. QFE PRESSURE IN HPA 1030.0 1028.4 1024.5 1022.0 1015.9 1009.7 1004.4 1010.7 1020.0 1025.4 1029.2 1032.1 1032.1 YEAR-DAY 92- 4 97- 6 3- 2 89- 1 92-14 86- 2 87-30 87-31 87-30 87-28 87-30 87- 2 87- 2 MIN. QFE PRESSURE IN HPA 1003.7 1004.0 997.0 999.4 996.0 990.9 987.4 990.2 995.6 1002.0 1004.9 1004.8 987.4 YEAR-DAY 96-12 3-20 89-10 88-25 1-29 3-30 0-10 95- 3 0- 2 86- 1 1-18 88-26 0-10 MEAN QNH PRESSURE IN HPA 1018.8 1017.1 1013.7 1010.7 1006.3 1000.3 996.6 998.7 1005.0 1012.0 1017.1 1019.5 1009.6 MAX. QNH PRESSURE IN HPA 1030.6 1029.0 1025.1 1022.6 1016.5 1010.3 1005.0 1011.3 1020.6 1026.0 1029.8 1032.7 1032.7 YEAR-DAY 92- 4 97- 6 3- 2 89- 1 92-14 86- 2 87-30 87-31 87-30 87-28 87-30 87- 2 87- 2 MIN. QNH PRESSURE IN HPA 1004.3 1004.6 997.6 1000.0 996.6 991.5 988.0 990.8 996.2 1002.6 1005.5 1005.4 988.0 YEAR-DAY 96-12 3-20 89-10 88-25 1-29 3-30 0-10 95- 3 0- 2 86- 1 1-18 88-26 0-10 MEAN QFF PRESSURE IN HPA 1018.7 1017.3 1014.0 1010.6 1006.1 1000.0 996.4 998.5 1004.7 1011.8 1016.8 1019.8 1009.6 MAX. QFF PRESSURE IN HPA 1029.4 1029.4 1025.5 1022.6 1015.1 1010.6 1004.8 1005.8 1015.4 1020.1 1028.6 1030.1 1030.1 YEAR-DAY 0-30 97- 6 3- 2 97-12 97- 6 86- 2 96- 3 93-18 94-24 5-23 4-28 4-18 4-18 MIN. QFF PRESSURE IN HPA 1004.6 1004.9 1000.5 1000.8 996.9 991.7 988.2 991.0 996.5 1003.9 1005.8 1006.4 988.2 YEAR-DAY 3-28 3-20 97-29 3-27 1-29 3-30 0-10 95- 3 0- 2 1- 1 1-18 2-21 0-10 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 1017.6 1016.2 1012.7 1009.3 1004.8 998.8 995.1 997.1 1003.3 1010.4 1015.6 1018.6 1008.3 MAX. QFE PRESSURE IN HPA 1025.8 1026.4 1023.0 1020.3 1012.5 1006.4 1000.8 1003.4 1012.2 1017.7 1025.9 1029.0 1029.0 YEAR-DAY 0-30 2- 1 97- 1 97-13 94- 8 4- 3 96- 4 93-19 94-24 5-23 4-29 94- 7 94- 7 MIN. QFE PRESSURE IN HPA 1004.6 1005.5 1000.2 1002.0 997.2 992.1 988.8 991.5 996.5 1003.0 1004.9 1005.8 988.8 YEAR-DAY 96-12 94- 1 1-25 4-17 1-29 97-28 99-13 0-11 0- 2 1- 1 1-18 2-21 99-13 MEAN QNH PRESSURE IN HPA 1018.2 1016.8 1013.4 1010.0 1005.4 999.4 995.7 997.7 1003.9 1011.1 1016.3 1019.3 1008.9 MAX. QNH PRESSURE IN HPA 1026.4 1027.0 1023.6 1020.9 1013.1 1007.0 1001.4 1004.0 1012.8 1018.3 1026.5 1029.6 1029.6 YEAR-DAY 0-30 2- 1 97- 1 97-13 94- 8 4- 3 96- 4 93-19 94-24 5-23 4-29 94- 7 94- 7 MIN. QNH PRESSURE IN HPA 1005.2 1006.1 1000.8 1002.6 997.8 992.7 989.4 992.1 997.1 1003.6 1005.5 1006.4 989.4 YEAR-DAY 96-12 94- 1 1-25 4-17 1-29 97-28 99-13 0-11 0- 2 1- 1 1-18 2-21 99-13 MEAN QFF PRESSURE IN HPA 1018.5 1017.1 1013.7 1010.2 1005.7 999.6 996.0 998.0 1004.1 1011.3 1016.5 1019.6 1009.2 MAX. QFF PRESSURE IN HPA 1026.8 1027.4 1023.9 1021.2 1013.4 1007.3 1001.7 1004.2 1013.1 1018.6 1026.9 1030.0 1030.0 YEAR-DAY 0-30 2- 1 97- 1 97-13 94- 8 4- 3 96- 4 93-19 94-24 5-23 4-29 94- 7 94- 7 MIN. QFF PRESSURE IN HPA 1005.5 1006.4 1001.1 1002.9 998.1 992.9 989.6 992.3 997.4 1003.9 1005.8 1006.7 989.6 YEAR-DAY 96-12 94- 1 1-25 4-17 1-29 97-28 99-13 0-11 0- 2 1- 1 1-18 2-21 99-13 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.1 1016.4 1013.1 1010.2 1006.0 999.9 996.2 998.3 1004.4 1011.5 1016.5 1018.8 1009.1 MAX. QFE PRESSURE IN HPA 1027.6 1026.9 1023.0 1021.0 1014.8 1008.7 1002.8 1009.1 1017.2 1024.5 1027.0 1031.7 1031.7 YEAR-DAY 92- 4 2- 1 3- 2 89- 1 92-14 86- 2 92- 6 87-31 87-30 87-28 87-30 87- 2 87- 2 MIN. QFE PRESSURE IN HPA 1003.7 1004.5 999.6 1002.3 998.0 992.0 989.6 992.2 997.0 1003.2 1005.4 1004.8 989.6 YEAR-DAY 96-12 88- 2 97-29 0-21 4-13 91-19 99-12 89-28 94- 1 88- 1 1-18 88-26 99-12 MEAN QNH PRESSURE IN HPA 1018.7 1017.1 1013.8 1010.8 1006.6 1000.5 996.8 998.9 1005.0 1012.1 1017.1 1019.4 1009.7 MAX. QNH PRESSURE IN HPA 1028.2 1027.5 1023.6 1021.6 1015.4 1009.3 1003.4 1009.7 1017.8 1025.1 1027.6 1032.3 1032.3 YEAR-DAY 92- 4 2- 1 3- 2 89- 1 92-14 86- 2 92- 6 87-31 87-30 87-28 87-30 87- 2 87- 2 MIN. QNH PRESSURE IN HPA 1004.3 1005.1 1000.2 1002.9 998.6 992.6 990.2 992.8 997.6 1003.8 1006.0 1005.4 990.2 YEAR-DAY 96-12 88- 2 97-29 0-21 4-13 91-19 99-12 89-28 94- 1 88- 1 1-18 88-26 99-12 MEAN QFF PRESSURE IN HPA 1019.0 1017.4 1014.0 1011.1 1006.9 1000.8 997.0 999.1 1005.3 1012.4 1017.4 1019.7 1010.0 MAX. QFF PRESSURE IN HPA 1028.6 1027.9 1024.0 1021.9 1015.7 1009.6 1003.7 1010.0 1018.1 1025.4 1027.9 1032.7 1032.7 YEAR-DAY 92- 4 2- 1 3- 2 89- 1 92-14 86- 2 92- 6 87-31 87-30 87-28 87-30 87- 2 87- 2 MIN. QFF PRESSURE IN HPA 1004.6 1005.4 1000.5 1003.2 998.9 992.8 990.4 993.1 997.9 1004.1 1006.3 1005.7 990.4 YEAR-DAY 96-12 88- 2 97-29 0-21 4-13 91-19 0-10 89-28 94- 1 88- 1 1-18 88-26 0-10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION BOSTAN (40810) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 31 43 N LONGITUDE 48 0 E DATA PROCESSING CENTER ELEVATION 7.8 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 1019.4 1017.8 1014.4 1011.4 1007.1 1000.8 997.0 999.4 1005.7 1012.9 1017.9 1020.1 1010.3 MAX. QFE PRESSURE IN HPA 1030.0 1028.4 1024.5 1022.0 1015.9 1009.7 1004.2 1010.5 1019.3 1025.4 1028.8 1032.1 1032.1 YEAR-DAY 92- 4 97- 6 3- 2 89- 1 92-14 86- 2 87-30 87-31 87-30 87-28 87-30 87- 2 87- 2 MIN. QFE PRESSURE IN HPA 1005.6 1004.1 997.0 1002.4 998.6 993.0 989.8 993.2 998.1 1004.4 1007.0 1005.8 989.8 YEAR-DAY 96-12 3-20 89-10 88-25 1-29 91-19 0-10 89-28 94- 1 1- 1 1-18 88-26 0-10 MEAN QNH PRESSURE IN HPA 1020.1 1018.4 1015.1 1012.1 1007.7 1001.4 997.7 1000.0 1006.3 1013.6 1018.5 1020.7 1011.0 MAX. QNH PRESSURE IN HPA 1030.6 1029.0 1025.1 1022.6 1016.5 1010.3 1004.8 1011.1 1019.9 1026.0 1029.4 1032.7 1032.7 YEAR-DAY 92- 4 97- 6 3- 2 89- 1 92-14 86- 2 87-30 87-31 87-30 87-28 87-30 87- 2 87- 2 MIN. QNH PRESSURE IN HPA 1006.2 1004.7 997.6 1003.0 999.2 993.6 990.4 993.8 998.7 1005.0 1007.6 1006.4 990.4 YEAR-DAY 96-12 3-20 89-10 88-25 1-29 91-19 0-10 89-28 94- 1 1- 1 1-18 88-26 0-10 MEAN QFF PRESSURE IN HPA 1020.0 1018.7 1015.5 1012.3 1007.9 1001.2 997.6 999.9 1006.1 1013.5 1018.4 1021.2 1011.0 MAX. QFF PRESSURE IN HPA 1029.4 1029.4 1025.5 1022.6 1015.9 1010.6 1004.5 1005.7 1015.4 1020.1 1028.6 1030.1 1030.1 YEAR-DAY 0-30 97- 6 3- 2 97-12 87-12 86- 2 96- 3 2-29 94-24 5-23 4-28 4-18 4-18 MIN. QFF PRESSURE IN HPA 1006.5 1005.0 1001.8 1004.9 999.5 994.2 990.6 994.3 999.0 1005.3 1007.9 1008.2 990.6 YEAR-DAY 96-12 3-20 97-29 3-27 1-29 3-30 0-10 99- 7 94- 1 1- 1 1-18 2-21 0-10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.9 1017.3 1014.0 1011.0 1006.6 1000.4 996.8 999.0 1005.2 1012.2 1017.0 1019.4 1009.8 MAX. QFE PRESSURE IN HPA 1029.9 1028.2 1023.6 1021.3 1015.8 1009.7 1004.4 1010.7 1020.0 1025.0 1029.2 1032.1 1032.1 YEAR-DAY 92- 4 2- 1 3- 2 97-12 89- 8 86- 2 87-30 87-31 87-30 87-31 87-30 87- 2 87- 2 MIN. QFE PRESSURE IN HPA 1004.4 1004.1 998.0 1002.1 998.0 992.7 989.2 993.3 997.3 1003.5 1006.0 1006.6 989.2 YEAR-DAY 3-28 3-20 89-10 88-25 1-29 3-30 0-10 94-10 0- 2 88- 1 86- 8 2-21 0-10 MEAN QNH PRESSURE IN HPA 1019.5 1018.0 1014.7 1011.6 1007.3 1001.0 997.4 999.6 1005.8 1012.8 1017.6 1020.0 1010.4 MAX. QNH PRESSURE IN HPA 1030.5 1028.8 1024.2 1021.9 1016.4 1010.3 1005.0 1011.3 1020.6 1025.6 1029.8 1032.7 1032.7 YEAR-DAY 92- 4 2- 1 3- 2 97-12 89- 8 86- 2 87-30 87-31 87-30 87-31 87-30 87- 2 87- 2 MIN. QNH PRESSURE IN HPA 1005.0 1004.7 998.6 1002.7 998.6 993.3 989.8 993.9 997.9 1004.1 1006.6 1007.2 989.8 YEAR-DAY 3-28 3-20 89-10 88-25 1-29 3-30 0-10 94-10 0- 2 88- 1 86- 8 2-21 0-10 MEAN QFF PRESSURE IN HPA 1019.4 1018.3 1015.0 1011.6 1007.0 1000.8 997.2 999.4 1005.5 1012.6 1017.4 1020.3 1010.4 MAX. QFF PRESSURE IN HPA 1029.0 1029.2 1024.5 1022.2 1015.1 1009.3 1004.8 1005.3 1014.6 1019.1 1027.6 1029.1 1029.2 YEAR-DAY 0-30 2- 1 3- 2 97-12 97- 6 3- 2 96- 3 93-18 94-24 5-23 4-28 4-18 2- 1 MIN. QFF PRESSURE IN HPA 1005.3 1005.0 1001.9 1003.1 998.9 993.5 990.0 994.1 998.2 1004.5 1007.7 1007.5 990.0 YEAR-DAY 3-28 3-20 0-24 3-27 1-29 3-30 0-10 94-10 0- 2 1- 1 1-18 2-21 0-10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.3 1015.5 1012.2 1009.3 1005.2 999.1 995.4 997.4 1003.6 1010.5 1015.5 1017.9 1008.3 MAX. QFE PRESSURE IN HPA 1028.2 1026.4 1021.4 1019.4 1013.9 1008.7 1002.7 1009.6 1017.5 1023.9 1027.4 1029.8 1029.8 YEAR-DAY 92- 4 93- 7 92-12 97-12 92-14 86- 2 87- 9 87-31 87-30 87-31 87-30 87- 1 87- 1 MIN. QFE PRESSURE IN HPA 1003.7 1004.0 999.7 1000.7 996.3 991.2 987.9 991.0 995.6 1002.0 1005.2 1005.4 987.9 YEAR-DAY 3-28 3-20 3-12 88-25 1-29 3-30 0-10 95- 3 0- 2 86- 1 86- 8 88-25 0-10 MEAN QNH PRESSURE IN HPA 1017.9 1016.1 1012.9 1010.0 1005.8 999.8 996.1 998.1 1004.2 1011.2 1016.1 1018.6 1008.9 MAX. QNH PRESSURE IN HPA 1028.8 1027.0 1022.0 1020.0 1014.5 1009.3 1003.3 1010.2 1018.1 1024.5 1028.0 1030.4 1030.4 YEAR-DAY 92- 4 93- 7 92-12 97-12 92-14 86- 2 87- 9 87-31 87-30 87-31 87-30 87- 1 87- 1 MIN. QNH PRESSURE I