STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.6 9.2 11.3 18.0 23.9 28.4 28.9 28.7 26.0 16.7 13.2 8.9 18.3 MINIMUN AIR TEMPERATURE (C) -5.3 -3.2 3.3 6.2 12.0 14.6 16.7 16.6 13.5 5.4 0.1 -3.0 6.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 3 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 23 13 0 0 0 0 0 0 0 0 5 10 51 DAYS WITH FREEZING MIN.<= 0 29 25 7 1 0 0 0 0 0 3 16 24 105 TEMPERATURE RECORDS LOWEST(C) -10.2 -7.5 -1.8 -0.6 5.0 10.0 10.6 11.8 6.4 -1.6 -6.0 -15.2 -15.2 DAY 8 24 22 8 9 2 4 27 30 18 30 3 MAXIMUM AIR TEMPERATURE (C) 14.0 15.8 16.5 24.0 29.9 33.9 34.5 34.2 32.3 23.0 20.0 15.4 24.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 15 29 30 31 27 0 0 0 134 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.6 20.2 20.5 30.6 32.5 37.2 37.4 36.0 35.6 29.0 24.0 22.2 37.4 DAY 20 2 6 27 27 9 10 28 6 3 3 19 DIF. BETWEEN (MAX.-MIN.) (C) 19.3 19.0 13.2 17.8 17.9 19.3 17.8 17.6 18.8 17.6 19.9 18.4 18.1 MEAN DAILY TEMP. (MDT) (C) 4.3 6.3 9.9 15.1 21.0 24.3 25.6 25.4 22.9 14.2 10.0 6.2 15.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 24.5 100.1 142.6 136.7 70.7 0.0 0.0 0.0 474.7 HEATING DEG. DAYS(BASE 18 0C) 423.7 327.2 251.0 98.1 1.8 0.0 0.0 0.0 1.3 123.2 239.0 366.7 1832.0 DEWPOINT (MEAN C) ***** -5.0 -2.1 -1.6 3.2 5.0 8.9 6.1 3.1 -1.0 -4.8 -10.0 ***** MIXING RATIO (G/KG) ****** 3.38 4.30 4.35 6.12 7.03 9.26 7.54 6.11 4.62 3.43 2.39 ****** VAPOUR PRESSURE (HPA) ****** 4.41 5.58 5.66 7.94 9.07 11.90 9.72 7.92 6.03 4.48 3.13 ****** SATURATION DEF. (HPA) ****** 8.19 8.34 16.58 23.07 31.33 29.75 31.14 27.69 14.56 12.16 9.25 ****** RELATIVE HUMIDITY (MEAN %) *** 41 45 32 29 24 31 26 24 34 31 28 *** RELATIVE HUMIDITY (MAX. %) 69 71 73 60 48 37 45 43 39 52 52 45 53 RELATIVE HUMIDITY (MIN. %) 20 25 28 18 19 18 24 18 16 24 21 18 21 RELATIVE HUMIDITY (MEAN% 03UTC) 69 71 71 60 48 36 43 43 39 50 52 44 52 RELATIVE HUMIDITY (MEAN% 09UTC) 27 31 35 22 22 20 26 20 20 29 24 22 25 RELATIVE HUMIDITY (MEAN% 15UTC) 34 32 36 23 23 22 28 22 19 32 27 23 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 1.0 3.0 32.2 14.0 0.6 0.0 3.0 0.0 0.0 6.0 0.0 7.0 66.8 DAYS WITH PRECIPITATION >=10 0 0 1 1 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 0 0 3 1 0 0 0 0 0 1 0 1 6 DAYS WITH PRECIPITATION >= 1 1 1 4 2 0 0 1 0 0 1 0 1 11 DAYS WITH PRECIPITATION 1 1 6 2 1 0 1 0 0 1 0 1 14 GREATEST DAILY PRECIPITATION 1.0 3.0 16.0 11.0 0.6 0.0 3.0 0.0 0.0 6.0 0.0 7.0 16.0 DAY 8 11 30 5 8 ** 28 ** ** 27 ** 29 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 4 8 5 1 0 0 0 2 2 1 0 1 24 WIND DIRECTION (PREVAILING) 180 180 180 180 180 360 360 360 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 6.9 8.3 10.4 8.2 5.6 8.8 10.3 10.1 5.7 5.5 7.3 8.6 6.9 PREVAILING WIND PERCENT 18.7 18.6 34.2 22.0 27.7 19.3 28.4 37.4 28.7 20.6 14.5 16.1 20.7 CALMS PERCENT OF WIND 31.6 22.1 18.7 28.0 20.6 14.0 7.1 5.8 16.7 31.0 51.7 32.3 23.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 145 155 1820 VECTOR WIND DIRECTION (MEAN) 208 209 202 231 196 356 14 6 180 215 211 177 214 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.9 5.7 3.6 0.9 1.6 2.6 3.3 1.9 1.5 0.7 2.5 1.2 WIND STEADINESES (MEAN %) 46.3 45.3 67.9 57.1 18.0 30.8 35.6 48.5 37.3 33.3 17.5 37.9 20.7 WIND SPEED (MEAN KNOTS) 4.1 6.4 8.4 6.3 5.0 5.2 7.3 6.8 5.1 4.5 4.0 6.6 5.8 FASTEST WIND DIRECTION 200 230 270 240 360 360 220 360 210 200 220 350 240 FASTEST WIND SPEED (KNOTS) 23 23 27 29 16 16 17 16 17 19 19 23 29 DAY 26 5 16 4 1 28 4 6 29 25 3 1 DAYS WITH SKY CLEAR (0-2)/8 26 17 13 22 15 29 26 26 28 22 25 21 270 DAYS WITH P.CLOUDY (3-6)/8 5 10 13 7 14 1 5 5 2 8 4 10 84 DAYS WITH CLOUDY (7-8)/8 0 1 5 1 2 0 0 0 0 1 0 0 10 DAYS WITH VISIBILITY =< 2 KM 0 0 2 1 0 0 0 1 0 3 0 0 7 DURATION OF SUNSHINE HOURS 265.8 236.9 205.2 288.6 285.3 350.5 337.9 321.7 298.2 272.3 271.3 262.4 3396.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 ****** 816.4 812.6 816.0 815.6 812.4 812.0 811.9 815.4 818.3 818.9 817.9 ****** MAX. QFE PRESSURE IN HPA ****** 823.4 819.8 820.6 820.0 817.8 816.6 818.0 821.8 822.2 824.1 825.7 ****** DAY-HOUR **-** 1- 6 2- 6 17- 6 5- 6 28- 6 29- 6 7- 6 26- 6 29- 6 30- 6 1- 6 MIN. QFE PRESSURE IN HPA ****** 807.6 806.2 811.0 810.1 806.9 806.4 807.4 811.3 813.0 814.0 807.7 ****** DAY-HOUR **-** 10-15 14-12 5- 9 6-15 12-15 3-12 29-12 2-15 21-15 26-12 31-12 MEAN QNH PRESSURE IN HPA ****** 1018.8 1014.3 1018.4 1017.9 1014.1 1013.6 1013.5 1017.6 1021.1 1021.9 1020.7 ****** MAX. QNH PRESSURE IN HPA ****** 1027.3 1023.0 1023.9 1023.2 1020.6 1019.1 1020.8 1025.4 1025.8 1028.1 1030.0 ****** DAY-HOUR **-** 1- 6 2- 6 17- 6 5- 6 28- 6 29- 6 7- 6 26- 6 29- 6 30- 6 1- 6 MIN. QNH PRESSURE IN HPA ****** 1008.4 1006.7 1012.4 1011.3 1007.5 1006.9 1008.1 1012.8 1014.8 1016.0 1008.5 ****** DAY-HOUR **-** 10-15 14-12 5- 9 6-15 12-15 3-12 29-12 2-15 21-15 26-12 31-12 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 819.0 816.9 813.1 816.4 816.3 813.1 812.7 812.8 816.1 818.8 819.4 818.5 816.1 MAX. QFE PRESSURE IN HPA 823.0 822.4 818.8 819.3 819.6 817.5 815.9 817.1 820.9 821.7 823.2 824.5 824.5 DAY 20 1 4 17 3 29 30 7 26 29 30 1 MIN. QFE PRESSURE IN HPA 817.0 812.8 806.8 811.4 812.2 808.1 808.8 810.0 813.5 815.2 816.3 810.3 806.8 DAY 9 11 14 5 23 13 4 25 11 21 11 31 MEAN QNH PRESSURE IN HPA 1022.0 1019.5 1014.9 1018.9 1018.7 1014.9 1014.5 1014.6 1018.5 1021.8 1022.5 1021.3 1018.5 MAX. QNH PRESSURE IN HPA 1026.8 1026.1 1021.8 1022.4 1022.7 1020.2 1018.3 1019.7 1024.3 1025.2 1027.0 1028.6 1028.6 DAY 20 1 4 17 3 29 30 7 26 29 30 1 MIN. QNH PRESSURE IN HPA 1019.6 1014.6 1007.4 1012.9 1013.9 1008.9 1009.8 1011.2 1015.4 1017.5 1018.8 1011.6 1007.4 DAY 9 11 14 5 23 13 4 25 11 21 11 31 MEAN QFF PRESSURE IN HPA 1022.9 1017.9 1009.9 1010.2 1005.1 998.3 997.0 997.6 1004.0 1014.3 1018.4 1020.5 1009.7 MAX. QFF PRESSURE IN HPA 1028.5 1025.7 1017.8 1015.7 1011.7 1007.8 1003.5 1002.1 1011.7 1021.9 1030.7 1035.8 1035.8 DAY 19 1 2 3 3 1 30 8 26 18 30 2 MIN. QFF PRESSURE IN HPA 1019.2 1010.5 999.6 1004.8 999.7 992.3 990.5 993.0 999.0 1006.6 1013.2 1010.5 990.5 DAY 27 18 14 20 23 11 26 18 2 4 4 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 820.3 818.0 813.7 817.3 817.0 813.7 813.3 813.4 817.0 819.7 820.4 819.5 816.9 MAX. QFE PRESSURE IN HPA 824.1 823.4 819.8 820.6 820.0 817.8 816.6 818.0 821.8 822.2 824.1 825.7 825.7 DAY 19 1 2 17 5 28 29 7 26 29 30 1 MIN. QFE PRESSURE IN HPA 817.8 814.0 807.4 812.4 813.4 808.6 809.4 810.6 814.6 816.0 817.2 811.0 807.4 DAY 9 10 14 5 7 13 4 25 2 21 11 31 MEAN QNH PRESSURE IN HPA 1023.6 1020.8 1015.7 1020.0 1019.6 1015.7 1015.1 1015.3 1019.6 1022.8 1023.7 1022.6 1019.5 MAX. QNH PRESSURE IN HPA 1028.1 1027.3 1023.0 1023.9 1023.2 1020.6 1019.1 1020.8 1025.4 1025.8 1028.1 1030.0 1030.0 DAY 19 1 2 17 5 28 29 7 26 29 30 1 MIN. QNH PRESSURE IN HPA 1020.6 1016.0 1008.1 1014.1 1015.3 1009.5 1010.5 1011.9 1016.7 1018.4 1019.8 1012.4 1008.1 DAY 9 10 14 5 7 13 4 25 2 21 11 31 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 819.6 817.0 812.9 816.4 816.0 812.8 812.3 812.3 815.9 818.7 819.1 817.9 815.9 MAX. QFE PRESSURE IN HPA 823.0 822.5 818.3 819.5 818.8 817.6 815.5 816.6 820.9 822.0 822.8 824.2 824.2 DAY 19 1 2 22 11 28 29 7 26 24 30 1 MIN. QFE PRESSURE IN HPA 816.6 812.5 807.0 811.0 812.5 807.6 807.8 809.6 813.5 814.8 815.6 810.0 807.0 DAY 9 10 14 5 7 13 3 25 2 11 26 31 MEAN QNH PRESSURE IN HPA 1022.8 1019.6 1014.7 1018.9 1018.4 1014.6 1014.0 1014.0 1018.3 1021.6 1022.1 1020.7 1018.3 MAX. QNH PRESSURE IN HPA 1026.8 1026.2 1021.2 1022.6 1021.8 1020.3 1017.8 1019.1 1024.3 1025.6 1026.5 1028.2 1028.2 DAY 19 1 2 22 11 28 29 7 26 24 30 1 MIN. QNH PRESSURE IN HPA 1019.1 1014.2 1007.6 1012.4 1014.2 1008.4 1008.6 1010.7 1015.4 1017.0 1017.9 1011.2 1007.6 DAY 9 10 14 5 7 13 3 25 2 11 26 31 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 818.1 814.9 811.4 814.8 814.5 811.4 810.9 810.7 814.0 817.1 817.7 816.5 814.3 MAX. QFE PRESSURE IN HPA 821.2 821.0 816.6 818.0 818.9 816.5 814.4 816.2 818.9 819.9 821.7 822.3 822.3 DAY 17 1 1 22 2 28 29 7 26 24 30 1 MIN. QFE PRESSURE IN HPA 815.0 809.0 806.2 811.2 810.5 807.0 806.4 807.4 811.4 813.2 814.0 807.7 806.2 DAY 9 10 14 5 6 13 3 29 11 21 26 31 MEAN QNH PRESSURE IN HPA 1020.9 1017.1 1012.9 1017.0 1016.6 1013.0 1012.3 1012.1 1016.0 1019.7 1020.4 1019.0 1016.4 MAX. QNH PRESSURE IN HPA 1024.6 1024.4 1019.1 1020.8 1021.9 1019.0 1016.5 1018.6 1021.9 1023.1 1025.2 1025.9 1025.9 DAY 17 1 1 22 2 28 29 7 26 24 30 1 MIN. QNH PRESSURE IN HPA 1017.2 1010.0 1006.7 1012.7 1011.8 1007.6 1006.9 1008.1 1012.9 1015.1 1016.0 1008.5 1006.7 DAY 9 10 14 5 6 13 3 29 11 21 26 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 818.4 815.1 811.7 815.0 814.2 811.2 810.8 810.6 813.9 817.1 818.0 817.1 814.4 MAX. QFE PRESSURE IN HPA 821.8 821.4 817.8 818.2 817.1 816.5 814.8 815.4 819.0 820.2 822.3 822.5 822.5 DAY 17 1 2 22 11 28 29 7 25 15 30 1 MIN. QFE PRESSURE IN HPA 815.4 807.6 806.2 812.4 810.1 806.9 806.5 807.4 811.3 813.0 814.5 808.2 806.2 DAY 9 10 14 6 6 12 3 29 2 21 26 31 MEAN QNH PRESSURE IN HPA 1021.3 1017.3 1013.3 1017.3 1016.3 1012.6 1012.1 1011.9 1016.0 1019.7 1020.9 1019.8 1016.5 MAX. QNH PRESSURE IN HPA 1025.4 1024.9 1020.6 1021.0 1019.7 1019.0 1017.0 1017.7 1022.0 1023.4 1025.9 1026.2 1026.2 DAY 17 1 2 22 11 28 29 7 25 15 30 1 MIN. QNH PRESSURE IN HPA 1017.7 1008.4 1006.7 1014.1 1011.3 1007.5 1007.0 1008.1 1012.8 1014.8 1016.6 1009.1 1006.7 DAY 9 10 14 6 6 12 3 29 2 21 26 31 MEAN QFF PRESSURE IN HPA 1022.1 1015.6 1008.3 1008.4 1002.7 995.6 994.5 994.9 1001.4 1012.1 1016.8 1018.8 1007.6 MAX. QFF PRESSURE IN HPA 1026.3 1022.8 1014.7 1013.4 1008.8 1004.4 1002.2 1000.0 1010.8 1020.5 1030.0 1032.5 1032.5 DAY 19 1 2 22 3 1 29 7 30 17 30 1 MIN. QFF PRESSURE IN HPA 1017.3 1005.9 999.8 1002.3 998.0 989.4 988.6 990.6 995.4 1004.7 1010.6 1008.6 988.6 DAY 26 10 14 19 29 9 26 28 1 3 3 31 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 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.0 7.0 12.4 17.1 24.5 28.7 31.3 29.1 25.3 19.2 12.4 8.2 18.4 MINIMUN AIR TEMPERATURE (C) -3.6 -0.7 2.8 6.5 10.2 13.5 19.5 17.2 11.4 5.8 -0.9 0.7 6.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 8 3 0 0 0 0 11 DAYS WITH MINIMUM TEMP. <=-4 15 7 1 0 0 0 0 0 0 0 7 2 32 DAYS WITH FREEZING MIN.<= 0 24 16 11 2 0 0 0 0 0 0 12 16 81 TEMPERATURE RECORDS LOWEST(C) -13.0 -7.6 -4.0 -1.0 7.0 10.0 13.0 9.4 6.4 0.2 -9.6 -7.4 -13.0 DAY 4 7 16 3 14 1 1 12 30 30 24 30 MAXIMUM AIR TEMPERATURE (C) 10.3 12.3 18.2 22.8 30.3 34.7 36.5 34.4 31.7 25.8 18.8 13.3 24.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 18 30 31 31 23 0 0 0 133 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.8 16.8 22.6 27.6 34.6 37.0 38.6 37.0 35.0 28.0 23.0 17.0 38.6 DAY 28 29 22 18 28 19 3 7 7 8 4 6 DIF. BETWEEN (MAX.-MIN.) (C) 13.9 13.0 15.4 16.3 20.1 21.2 17.0 17.2 20.3 20.0 19.7 12.6 17.2 MEAN DAILY TEMP. (MDT) (C) 3.4 5.8 10.5 14.7 20.2 24.1 28.0 25.8 21.6 15.8 8.9 7.0 15.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 10.6 92.9 209.7 149.6 38.3 0.0 0.0 0.0 501.1 HEATING DEG. DAYS(BASE 18 0C) 453.7 354.2 232.8 100.3 0.0 0.0 0.0 0.0 1.6 68.5 272.1 340.6 1823.8 DEWPOINT (MEAN C) -9.0 -6.8 -4.9 -1.6 -0.9 0.8 6.4 3.9 1.1 -3.1 -5.4 -4.0 -2.0 MIXING RATIO (G/KG) 2.55 3.00 3.46 4.36 4.56 5.07 7.69 6.47 5.36 3.80 3.28 3.82 4.45 VAPOUR PRESSURE (HPA) 3.32 3.91 4.50 5.67 5.93 6.56 9.87 8.33 6.95 4.96 4.30 4.97 5.77 SATURATION DEF. (HPA) 5.88 6.64 10.72 15.01 26.43 34.90 37.42 33.42 27.56 18.79 11.45 6.43 19.55 RELATIVE HUMIDITY (MEAN %) 40 41 34 32 21 18 23 21 22 24 30 47 29 RELATIVE HUMIDITY (MAX. %) 58 63 55 55 41 28 35 32 31 39 46 69 46 RELATIVE HUMIDITY (MIN. %) 27 26 21 19 12 13 16 16 15 16 21 32 20 RELATIVE HUMIDITY (MEAN% 03UTC) 57 62 54 55 41 27 35 31 31 39 46 66 45 RELATIVE HUMIDITY (MEAN% 09UTC) 33 34 26 24 15 14 20 18 20 18 24 39 24 RELATIVE HUMIDITY (MEAN% 15UTC) 34 33 28 26 14 14 17 16 16 20 27 45 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 69.0 53.0 34.0 21.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 32.1 220.1 DAYS WITH PRECIPITATION >=10 4 3 2 1 0 0 0 0 0 0 1 1 12 DAYS WITH PRECIPITATION >= 5 6 3 2 2 0 0 0 0 0 0 1 3 17 DAYS WITH PRECIPITATION >= 1 6 5 5 4 0 0 0 0 0 0 1 4 25 DAYS WITH PRECIPITATION 6 5 5 4 0 0 0 0 0 0 1 5 26 GREATEST DAILY PRECIPITATION 21.0 27.0 19.0 12.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 17.0 27.0 DAY 8 25 24 26 ** ** ** ** ** ** 30 27 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 1 1 2 1 0 0 0 0 0 0 1 0 6 WIND DIRECTION (PREVAILING) 90 180 225 270 270 180 360 360 180 270 270 180 180 PREVAILING WIND SPEED(KNOTS) 8.9 12.6 14.9 10.0 9.5 8.1 14.4 15.0 6.5 9.2 11.3 12.4 8.8 PREVAILING WIND PERCENT 16.8 22.8 23.2 22.0 32.9 26.0 19.4 14.2 26.8 12.3 12.0 14.8 16.0 CALMS PERCENT OF WIND 32.9 30.3 20.6 22.0 25.2 22.0 27.1 41.3 36.6 32.3 44.0 58.1 32.7 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 142 155 150 155 1822 VECTOR WIND DIRECTION (MEAN) 165 185 228 227 252 228 48 15 186 210 195 188 210 VECTOR WIND MAGNITUDE(KNOTS) 2.5 4.3 4.9 3.5 3.5 2.4 2.5 1.4 1.5 0.6 1.1 2.3 1.7 WIND STEADINESES (MEAN %) 39.1 58.1 55.1 49.3 53.0 35.3 30.1 23.7 33.3 9.7 20.8 57.5 26.2 WIND SPEED (MEAN KNOTS) 6.4 7.4 8.9 7.1 6.6 6.8 8.3 5.9 4.5 6.2 5.3 4.0 6.5 FASTEST WIND DIRECTION 250 180 220 270 280 10 360 360 240 360 240 180 180 FASTEST WIND SPEED (KNOTS) 27 39 33 19 17 23 23 27 14 19 17 23 39 DAY 26 3 9 5 7 7 14 1 4 4 28 27 DAYS WITH SKY CLEAR (0-2)/8 19 14 17 9 27 28 24 25 29 29 19 14 254 DAYS WITH P.CLOUDY (3-6)/8 6 10 10 19 4 2 7 6 0 2 11 10 87 DAYS WITH CLOUDY (7-8)/8 6 5 4 2 0 0 0 0 0 0 0 7 24 DAYS WITH VISIBILITY =< 2 KM 0 2 1 0 0 0 0 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 215.6 203.4 224.0 230.8 360.9 359.8 331.5 338.3 307.8 312.9 261.5 179.7 3326.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.2 814.1 813.2 815.0 814.5 811.6 808.7 810.4 814.2 817.8 818.4 816.2 814.1 MAX. QFE PRESSURE IN HPA 823.2 820.8 818.0 822.0 819.3 817.4 814.2 815.1 819.1 823.0 823.7 822.6 823.7 DAY-HOUR 3- 6 7- 6 17- 6 12- 6 3- 6 1- 6 31- 6 21- 6 14- 6 17- 6 5- 6 3- 6 MIN. QFE PRESSURE IN HPA 808.8 807.8 806.6 810.0 810.0 805.6 804.0 806.5 810.2 812.4 812.8 807.5 804.0 DAY-HOUR 19-12 3-12 23-15 28-12 19-12 30-12 17-15 24-12 1-15 7-12 30-15 26-12 MEAN QNH PRESSURE IN HPA 1017.4 1016.1 1015.1 1017.2 1016.6 1013.1 1009.6 1011.7 1016.2 1020.6 1021.3 1018.6 1016.1 MAX. QNH PRESSURE IN HPA 1027.0 1024.2 1020.8 1025.6 1022.4 1020.1 1016.3 1017.3 1022.1 1026.8 1027.6 1026.3 1027.6 DAY-HOUR 3- 6 7- 6 17- 6 12- 6 3- 6 1- 6 31- 6 21- 6 14- 6 17- 6 5- 6 3- 6 MIN. QNH PRESSURE IN HPA 1009.8 1008.6 1007.2 1011.2 1011.2 1006.0 1004.0 1007.0 1011.5 1014.1 1014.6 1008.2 1004.0 DAY-HOUR 19-12 3-12 23-15 28-12 19-12 30-12 17-15 24-12 1-15 7-12 30-15 26-12 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 815.3 814.4 813.6 815.3 815.1 812.4 809.6 811.2 814.8 818.2 818.9 816.4 814.6 MAX. QFE PRESSURE IN HPA 822.8 819.5 817.0 820.1 818.2 816.7 813.6 814.0 818.2 821.6 822.5 821.6 822.8 DAY 3 7 16 12 4 1 31 21 14 17 6 3 MIN. QFE PRESSURE IN HPA 809.0 810.4 809.0 812.3 812.6 807.8 806.6 809.0 812.0 814.2 815.2 809.9 806.6 DAY 19 17 24 25 1 30 18 25 2 8 29 26 MEAN QNH PRESSURE IN HPA 1017.6 1016.5 1015.5 1017.6 1017.3 1014.1 1010.8 1012.7 1017.0 1021.0 1021.8 1018.9 1016.7 MAX. QNH PRESSURE IN HPA 1026.5 1022.6 1019.6 1023.3 1021.0 1019.2 1015.5 1016.0 1021.0 1025.1 1026.2 1025.1 1026.5 DAY 3 7 16 12 4 1 31 21 14 17 6 3 MIN. QNH PRESSURE IN HPA 1010.0 1011.7 1010.0 1014.0 1014.3 1008.6 1007.2 1010.0 1013.6 1016.3 1017.5 1011.1 1007.2 DAY 19 17 24 25 1 30 18 25 2 8 29 26 MEAN QFF PRESSURE IN HPA 1018.3 1015.3 1010.5 1009.2 1003.7 997.7 991.9 995.5 1003.6 1012.7 1018.8 1017.0 1007.9 MAX. QFF PRESSURE IN HPA 1030.9 1026.8 1019.5 1015.5 1009.0 1004.9 997.0 1001.1 1008.5 1018.1 1025.4 1028.6 1030.9 DAY 3 7 16 4 4 10 31 31 30 28 26 30 MIN. QFF PRESSURE IN HPA 1009.0 1006.4 1002.4 1003.6 999.9 989.7 987.2 992.2 998.6 1006.2 1013.9 1006.4 987.2 DAY 19 17 23 23 19 30 18 23 12 8 20 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.5 815.7 814.7 816.4 815.9 813.1 810.1 811.9 815.8 819.4 820.0 817.6 815.6 MAX. QFE PRESSURE IN HPA 823.2 820.8 818.0 822.0 819.3 817.4 814.2 815.1 819.1 823.0 823.7 822.6 823.7 DAY 3 7 17 12 3 1 31 21 14 17 5 3 MIN. QFE PRESSURE IN HPA 810.8 810.9 809.5 812.7 813.1 808.1 807.1 810.0 812.7 815.3 816.2 810.7 807.1 DAY 19 3 24 25 1 30 18 24 2 7 29 26 MEAN QNH PRESSURE IN HPA 1019.0 1018.0 1016.8 1018.8 1018.3 1014.9 1011.3 1013.5 1018.1 1022.4 1023.2 1020.3 1017.9 MAX. QNH PRESSURE IN HPA 1027.0 1024.2 1020.8 1025.6 1022.4 1020.1 1016.3 1017.3 1022.1 1026.8 1027.6 1026.3 1027.6 DAY 3 7 17 12 3 1 31 21 14 17 5 3 MIN. QNH PRESSURE IN HPA 1012.2 1012.3 1010.6 1014.5 1014.9 1008.9 1007.8 1011.2 1014.5 1017.6 1018.6 1012.1 1007.8 DAY 19 3 24 25 1 30 18 24 2 7 29 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 815.6 814.5 813.6 815.4 814.9 811.9 808.9 810.7 814.4 818.0 818.5 816.4 814.4 MAX. QFE PRESSURE IN HPA 821.7 819.6 817.5 821.4 818.7 816.6 813.0 813.4 817.8 821.3 822.4 821.2 822.4 DAY 3 7 17 12 3 1 30 21 14 28 5 3 MIN. QFE PRESSURE IN HPA 810.1 808.1 810.0 811.9 812.1 807.0 806.0 808.4 811.6 814.1 814.7 809.1 806.0 DAY 19 3 14 25 19 30 18 24 3 7 29 26 MEAN QNH PRESSURE IN HPA 1017.9 1016.7 1015.6 1017.7 1017.1 1013.5 1009.9 1012.0 1016.4 1020.8 1021.4 1018.8 1016.5 MAX. QNH PRESSURE IN HPA 1025.2 1022.7 1020.2 1024.9 1021.6 1019.1 1014.8 1015.3 1020.6 1024.8 1026.1 1024.6 1026.1 DAY 3 7 17 12 3 1 30 21 14 28 5 3 MIN. QNH PRESSURE IN HPA 1011.3 1008.9 1011.2 1013.5 1013.7 1007.6 1006.4 1009.3 1013.1 1016.1 1016.9 1010.2 1006.4 DAY 19 3 14 25 19 30 18 24 3 7 29 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 814.0 812.7 812.0 813.8 813.5 810.5 807.5 809.2 812.9 816.6 817.1 814.9 812.9 MAX. QFE PRESSURE IN HPA 819.8 817.9 815.2 820.0 817.0 814.9 812.0 812.7 816.6 819.9 821.1 820.0 821.1 DAY 3 7 17 12 3 1 30 21 14 28 5 3 MIN. QFE PRESSURE IN HPA 808.8 807.8 807.1 810.0 810.0 805.6 804.5 806.5 810.4 812.4 812.9 807.5 804.5 DAY 19 3 23 28 19 30 17 24 2 7 30 26 MEAN QNH PRESSURE IN HPA 1016.0 1014.5 1013.6 1015.8 1015.4 1011.8 1008.2 1010.3 1014.7 1019.1 1019.7 1017.1 1014.7 MAX. QNH PRESSURE IN HPA 1023.0 1020.7 1017.5 1023.2 1019.6 1017.1 1013.6 1014.5 1019.1 1023.1 1024.5 1023.2 1024.5 DAY 3 7 17 12 3 1 30 21 14 28 5 3 MIN. QNH PRESSURE IN HPA 1009.8 1008.6 1007.8 1011.2 1011.2 1006.0 1004.6 1007.0 1011.7 1014.1 1014.7 1008.2 1004.6 DAY 19 3 23 28 19 30 17 24 2 7 30 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.6 813.2 812.3 814.1 813.3 810.1 807.4 809.2 813.0 817.0 817.6 815.7 813.1 MAX. QFE PRESSURE IN HPA 820.0 818.1 815.9 820.0 817.1 814.3 812.0 813.0 817.0 820.4 821.5 820.3 821.5 DAY 3 7 30 12 3 1 30 21 14 28 5 2 MIN. QFE PRESSURE IN HPA 809.1 808.1 806.6 810.2 810.4 806.0 804.0 806.5 810.2 812.5 812.8 808.9 804.0 DAY 19 3 23 28 19 30 17 24 1 7 30 27 MEAN QNH PRESSURE IN HPA 1016.7 1015.1 1014.0 1016.1 1015.2 1011.3 1008.1 1010.3 1014.9 1019.6 1020.4 1018.0 1015.0 MAX. QNH PRESSURE IN HPA 1023.2 1020.9 1018.3 1023.2 1019.7 1016.4 1013.6 1014.8 1019.6 1023.7 1025.0 1023.6 1025.0 DAY 3 7 30 12 3 1 30 21 14 28 5 2 MIN. QNH PRESSURE IN HPA 1010.2 1008.9 1007.2 1011.5 1011.7 1006.4 1004.0 1007.0 1011.5 1014.2 1014.6 1009.9 1004.0 DAY 19 3 23 28 19 30 17 24 1 7 30 27 MEAN QFF PRESSURE IN HPA 1017.4 1013.8 1008.9 1007.6 1001.6 994.8 989.2 993.1 1001.1 1011.2 1017.3 1016.2 1006.0 MAX. QFF PRESSURE IN HPA 1027.7 1024.5 1015.1 1017.3 1007.3 1001.5 996.5 998.1 1007.1 1016.7 1024.4 1026.5 1027.7 DAY 3 7 15 3 3 1 30 31 30 28 25 29 MIN. QFF PRESSURE IN HPA 1009.4 1005.7 1001.7 1001.7 996.4 987.8 982.8 989.3 995.3 1004.7 1011.5 1006.9 982.8 DAY 26 3 23 30 19 30 17 7 12 8 30 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.5 4.5 10.8 15.7 23.1 26.7 30.2 28.5 24.8 19.8 12.5 6.9 17.3 MINIMUN AIR TEMPERATURE (C) -6.0 -5.7 1.4 5.9 10.8 15.9 20.1 16.6 11.4 6.7 3.2 -1.6 6.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 12 1 0 0 0 0 14 DAYS WITH MINIMUM TEMP. <=-4 25 20 2 0 0 0 0 0 0 0 1 11 59 DAYS WITH FREEZING MIN.<= 0 28 23 14 4 0 0 0 0 0 0 6 21 96 TEMPERATURE RECORDS LOWEST(C) -12.6 -14.0 -4.0 -1.6 1.6 11.6 16.6 12.4 2.4 2.4 -4.8 -7.8 -14.0 DAY 19 15 1 1 3 1 22 31 25 23 26 23 MAXIMUM AIR TEMPERATURE (C) 9.0 10.2 16.0 20.5 28.1 34.4 34.6 33.3 30.6 25.9 17.8 11.9 22.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 30 31 31 19 1 0 0 121 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.8 16.4 21.2 26.8 34.4 37.8 38.0 35.0 33.2 30.0 22.2 17.6 38.0 DAY 22 28 4 19 28 26 9 12 6 10 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 15.0 15.9 14.6 14.6 17.3 18.5 14.5 16.7 19.2 19.2 14.6 13.5 16.1 MEAN DAILY TEMP. (MDT) (C) 1.5 2.2 8.7 13.2 19.5 25.2 27.3 25.0 21.0 16.3 10.5 5.2 14.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 26.4 125.3 196.7 122.7 31.7 0.0 0.0 0.0 502.8 HEATING DEG. DAYS(BASE 18 0C) 511.4 441.6 288.3 143.8 28.4 0.0 0.0 0.0 9.0 56.0 226.0 397.7 2102.2 DEWPOINT (MEAN C) -11.2 -12.0 -5.7 -3.4 -0.8 1.3 5.1 4.4 1.6 0.1 -1.5 -5.3 -2.3 MIXING RATIO (G/KG) 2.14 2.10 3.31 3.87 4.57 5.25 6.96 6.68 5.48 4.86 4.44 3.35 4.42 VAPOUR PRESSURE (HPA) 2.78 2.74 4.29 5.03 5.94 6.80 8.98 8.62 7.11 6.34 5.80 4.37 5.73 SATURATION DEF. (HPA) 5.56 6.44 9.50 13.97 24.23 36.38 35.27 31.61 26.15 18.28 9.43 6.08 18.57 RELATIVE HUMIDITY (MEAN %) 38 33 36 31 22 17 22 22 23 28 42 46 30 RELATIVE HUMIDITY (MAX. %) 63 52 57 57 38 25 30 29 32 38 65 72 47 RELATIVE HUMIDITY (MIN. %) 21 20 23 19 15 12 17 17 18 22 27 30 20 RELATIVE HUMIDITY (MEAN% 03UTC) 62 49 56 55 38 25 29 28 31 38 64 71 46 RELATIVE HUMIDITY (MEAN% 09UTC) 30 27 31 22 18 15 19 20 21 25 33 36 25 RELATIVE HUMIDITY (MEAN% 15UTC) 31 25 27 25 17 14 18 19 19 23 33 37 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.0 0.0 37.2 19.6 0.0 0.0 0.6 0.0 0.0 0.0 17.0 26.0 102.4 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 2 3 DAYS WITH PRECIPITATION >= 5 0 0 4 2 0 0 0 0 0 0 2 2 10 DAYS WITH PRECIPITATION >= 1 2 0 8 6 0 0 0 0 0 0 5 3 24 DAYS WITH PRECIPITATION 2 0 9 7 0 0 1 0 0 0 5 3 27 GREATEST DAILY PRECIPITATION 1.0 0.0 13.0 6.0 0.0 0.0 0.6 0.0 0.0 0.0 5.0 15.0 15.0 DAY 3 ** 19 30 ** ** 17 ** ** ** 8 5 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 4 4 4 0 6 1 2 0 0 0 0 1 22 WIND DIRECTION (PREVAILING) 270 270 270 180 270 270 360 360 360 180 270 180 270 PREVAILING WIND SPEED(KNOTS) 12.7 12.6 12.5 8.3 12.6 9.6 15.4 13.1 10.6 8.6 10.3 9.9 10.8 PREVAILING WIND PERCENT 16.8 18.6 21.9 16.7 22.6 22.7 38.1 29.7 20.0 14.8 22.0 19.4 13.8 CALMS PERCENT OF WIND 45.8 40.0 45.2 40.0 25.2 30.7 21.3 33.5 36.0 52.3 50.7 25.2 37.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 231 238 243 190 254 252 17 12 338 155 241 191 269 VECTOR WIND MAGNITUDE(KNOTS) 3.0 3.5 4.0 0.9 3.1 2.2 7.3 3.6 0.9 0.5 2.0 2.2 1.1 WIND STEADINESES (MEAN %) 50.8 56.5 64.5 16.1 41.3 33.8 69.5 48.6 15.8 11.6 45.5 34.9 17.2 WIND SPEED (MEAN KNOTS) 5.9 6.2 6.2 5.6 7.5 6.5 10.5 7.4 5.7 4.3 4.4 6.3 6.4 FASTEST WIND DIRECTION 260 250 260 360 320 100 360 360 360 360 270 190 260 FASTEST WIND SPEED (KNOTS) 39 39 39 23 35 19 35 23 17 16 19 27 39 DAY 17 23 30 30 6 30 21 6 23 10 21 4 DAYS WITH SKY CLEAR (0-2)/8 21 18 14 7 24 29 27 25 30 27 11 19 252 DAYS WITH P.CLOUDY (3-6)/8 10 7 13 17 5 1 4 6 0 4 15 6 88 DAYS WITH CLOUDY (7-8)/8 0 3 4 6 2 0 0 0 0 0 4 6 25 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 0 1 DURATION OF SUNSHINE HOURS 259.3 229.4 227.9 221.2 324.3 ****** ****** ****** 297.2 287.0 209.8 222.5 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 813.4 814.8 812.6 815.2 814.6 811.7 811.0 811.7 814.0 818.0 818.5 816.1 814.3 MAX. QFE PRESSURE IN HPA 818.7 820.7 818.4 820.3 818.1 815.6 814.5 815.8 822.0 824.3 823.2 821.4 824.3 DAY-HOUR 19- 6 8- 6 1- 6 9- 6 13- 6 3- 6 20- 6 31- 6 24- 6 27- 6 29- 6 1- 6 MIN. QFE PRESSURE IN HPA 807.7 807.7 806.8 810.8 810.3 806.5 806.8 805.6 809.0 813.2 814.7 811.6 805.6 DAY-HOUR 12-12 14- 9 29-12 23-12 31-15 7-12 5-15 1-15 11-15 1-12 24-12 23-12 MEAN QNH PRESSURE IN HPA 1015.3 1016.9 1014.3 1017.5 1016.7 1013.2 1012.4 1013.3 1016.0 1020.8 1021.4 1018.5 1016.4 MAX. QNH PRESSURE IN HPA 1021.6 1024.0 1021.3 1023.6 1020.9 1017.9 1016.6 1018.2 1025.6 1028.3 1027.0 1024.9 1028.3 DAY-HOUR 19- 6 8- 6 1- 6 9- 6 13- 6 3- 6 20- 6 31- 6 24- 6 27- 6 29- 6 1- 6 MIN. QNH PRESSURE IN HPA 1008.5 1008.5 1007.4 1012.2 1011.6 1007.0 1007.4 1006.0 1010.0 1015.1 1016.9 1013.1 1006.0 DAY-HOUR 12-12 14- 9 29-12 23-12 31-15 7-12 5-15 1-15 11-15 1-12 24-12 23-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 813.4 814.9 813.0 815.6 815.2 812.4 811.8 812.5 814.8 818.5 819.0 816.3 814.8 MAX. QFE PRESSURE IN HPA 817.4 819.5 817.5 819.4 817.6 815.0 814.2 814.9 820.8 822.7 822.6 820.4 822.7 DAY 19 26 1 9 13 3 20 31 24 27 29 1 MIN. QFE PRESSURE IN HPA 808.3 808.0 807.8 811.7 813.0 809.6 810.1 808.3 811.4 814.9 816.0 813.2 807.8 DAY 12 23 30 23 31 7 5 2 12 2 25 21 MEAN QNH PRESSURE IN HPA 1015.3 1017.1 1014.8 1017.9 1017.4 1014.2 1013.4 1014.2 1017.0 1021.4 1022.0 1018.7 1017.0 MAX. QNH PRESSURE IN HPA 1020.1 1022.6 1020.2 1022.5 1020.3 1017.2 1016.3 1017.1 1024.2 1026.4 1026.3 1023.7 1026.4 DAY 19 26 1 9 13 3 20 31 24 27 29 1 MIN. QNH PRESSURE IN HPA 1009.2 1008.8 1008.6 1013.3 1014.8 1010.7 1011.3 1009.2 1012.9 1017.1 1018.4 1015.1 1008.6 DAY 12 23 30 23 31 7 5 2 12 2 25 21 MEAN QFF PRESSURE IN HPA 1017.6 1018.8 1010.8 1010.3 1004.7 996.8 994.9 997.6 1003.8 1012.4 1017.5 1018.4 1008.7 MAX. QFF PRESSURE IN HPA 1028.3 1030.3 1018.9 1018.2 1014.1 999.7 999.2 1002.6 1016.2 1018.4 1024.8 1024.4 1030.3 DAY 19 26 1 1 2 3 22 31 24 27 26 19 MIN. QFF PRESSURE IN HPA 1005.7 1003.9 1004.2 1004.7 997.4 993.9 992.1 990.5 997.0 1006.0 1012.5 1010.9 990.5 DAY 12 23 28 23 31 7 14 2 12 2 12 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.9 816.2 814.0 816.5 816.1 813.1 812.2 813.1 815.6 819.6 820.0 817.4 815.7 MAX. QFE PRESSURE IN HPA 818.7 820.7 818.4 820.3 818.1 815.6 814.5 815.8 822.0 824.3 823.2 821.4 824.3 DAY 19 8 1 9 13 3 20 31 24 27 29 1 MIN. QFE PRESSURE IN HPA 809.6 809.5 807.8 812.4 813.8 809.6 810.1 809.0 812.2 816.0 817.4 814.8 807.8 DAY 12 14 30 23 31 7 5 1 12 2 12 15 MEAN QNH PRESSURE IN HPA 1017.1 1018.7 1016.0 1019.0 1018.5 1014.9 1013.9 1015.0 1017.9 1022.8 1023.2 1020.1 1018.1 MAX. QNH PRESSURE IN HPA 1021.6 1024.0 1021.3 1023.6 1020.9 1017.9 1016.6 1018.2 1025.6 1028.3 1027.0 1024.9 1028.3 DAY 19 8 1 9 13 3 20 31 24 27 29 1 MIN. QNH PRESSURE IN HPA 1010.7 1010.6 1008.6 1014.1 1015.8 1010.7 1011.3 1010.0 1013.9 1018.4 1020.1 1017.0 1008.6 DAY 12 14 30 23 31 7 5 1 12 2 12 15 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 813.7 815.1 813.0 815.5 814.9 812.0 811.1 812.0 814.2 818.2 818.5 816.1 814.5 MAX. QFE PRESSURE IN HPA 817.4 819.4 816.9 819.4 816.8 814.6 813.6 814.3 820.0 822.3 821.4 820.2 822.3 DAY 27 20 8 9 13 3 20 26 24 27 29 1 MIN. QFE PRESSURE IN HPA 808.5 807.7 807.7 811.2 812.6 807.9 809.1 808.0 811.0 815.0 816.2 813.1 807.7 DAY 12 14 30 23 31 7 5 1 12 2 12 23 MEAN QNH PRESSURE IN HPA 1015.7 1017.3 1014.8 1017.8 1017.1 1013.6 1012.6 1013.6 1016.2 1021.1 1021.4 1018.5 1016.6 MAX. QNH PRESSURE IN HPA 1020.1 1022.5 1019.5 1022.5 1019.4 1016.7 1015.5 1016.4 1023.2 1025.9 1024.9 1023.4 1025.9 DAY 27 20 8 9 13 3 20 26 24 27 29 1 MIN. QNH PRESSURE IN HPA 1009.4 1008.5 1008.5 1012.7 1014.3 1008.7 1010.2 1008.8 1012.4 1017.2 1018.6 1014.9 1008.5 DAY 12 14 30 23 31 7 5 1 12 2 12 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 812.3 813.6 811.3 814.2 813.5 810.6 809.9 810.6 812.6 816.6 817.3 814.8 813.1 MAX. QFE PRESSURE IN HPA 816.2 817.5 816.2 817.4 815.4 813.0 812.3 813.4 818.0 821.2 820.0 818.7 821.2 DAY 27 20 31 9 13 3 20 31 24 27 28 2 MIN. QFE PRESSURE IN HPA 807.7 808.0 806.8 810.8 810.7 806.5 807.3 806.0 809.3 813.2 814.7 811.6 806.0 DAY 12 14 29 23 31 7 5 1 12 1 24 23 MEAN QNH PRESSURE IN HPA 1014.0 1015.6 1012.8 1016.2 1015.4 1012.0 1011.1 1011.9 1014.3 1019.2 1019.9 1017.0 1014.9 MAX. QNH PRESSURE IN HPA 1018.6 1020.2 1018.6 1020.1 1017.7 1014.8 1014.0 1015.3 1020.8 1024.6 1023.2 1021.6 1024.6 DAY 27 20 31 9 13 3 20 31 24 27 28 2 MIN. QNH PRESSURE IN HPA 1008.5 1008.8 1007.4 1012.2 1012.1 1007.0 1008.0 1006.4 1010.4 1015.1 1016.9 1013.1 1006.4 DAY 12 14 29 23 31 7 5 1 12 1 24 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 812.8 814.1 811.7 814.4 813.5 810.2 809.9 810.6 812.7 817.1 818.0 815.7 813.4 MAX. QFE PRESSURE IN HPA 816.0 818.1 816.7 817.4 815.8 812.7 812.3 813.4 817.7 821.5 821.0 819.4 821.5 DAY 10 20 31 9 13 25 20 31 24 27 28 1 MIN. QFE PRESSURE IN HPA 809.2 808.8 808.0 811.0 810.3 806.5 806.8 805.6 809.0 813.4 815.1 812.5 805.6 DAY 17 12 29 22 31 7 5 1 11 1 5 31 MEAN QNH PRESSURE IN HPA 1014.5 1016.1 1013.2 1016.5 1015.4 1011.5 1011.1 1012.0 1014.4 1019.8 1020.8 1018.1 1015.3 MAX. QNH PRESSURE IN HPA 1018.4 1020.9 1019.2 1020.1 1018.2 1014.5 1014.0 1015.3 1020.4 1025.0 1024.4 1022.5 1025.0 DAY 10 20 31 9 13 25 20 31 24 27 28 1 MIN. QNH PRESSURE IN HPA 1010.3 1009.8 1008.8 1012.4 1011.6 1007.0 1007.4 1006.0 1010.0 1015.3 1017.3 1014.2 1006.0 DAY 17 12 29 22 31 7 5 1 11 1 5 31 MEAN QFF PRESSURE IN HPA 1016.8 1017.7 1009.3 1009.0 1002.5 994.0 992.5 995.2 1001.1 1010.6 1016.4 1017.9 1006.9 MAX. QFF PRESSURE IN HPA 1023.4 1026.6 1019.2 1014.9 1011.8 997.0 996.4 1000.3 1011.8 1016.1 1023.5 1022.7 1026.6 DAY 19 8 31 2 1 2 28 31 24 27 26 18 MIN. QFF PRESSURE IN HPA 1009.6 1007.6 1003.1 1003.6 994.4 990.3 987.7 988.9 993.8 1004.1 1012.3 1012.1 987.7 DAY 12 22 28 22 31 7 5 1 11 1 6 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.4 7.0 12.1 17.0 25.3 29.4 30.3 30.2 26.4 19.1 13.2 8.0 18.5 MINIMUN AIR TEMPERATURE (C) -3.1 -1.3 0.8 5.7 11.8 15.0 20.0 18.3 13.2 6.5 0.6 -4.0 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 10 4 1 0 0 0 16 DAYS WITH MINIMUM TEMP. <=-4 15 10 2 0 0 0 0 0 0 0 1 16 44 DAYS WITH FREEZING MIN.<= 0 26 19 16 1 0 0 0 0 0 1 11 28 102 TEMPERATURE RECORDS LOWEST(C) -10.6 -8.0 -8.0 -0.4 3.4 10.2 15.0 9.4 7.4 -1.4 -4.6 -16.6 -16.6 DAY 31 12 22 7 14 3 14 16 30 31 30 29 MAXIMUM AIR TEMPERATURE (C) 9.1 11.7 18.1 22.3 30.5 34.2 34.8 35.5 32.3 25.3 19.7 14.2 24.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 21 28 31 31 22 0 0 0 133 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.8 15.8 25.8 28.0 34.2 38.5 38.4 37.4 35.8 29.4 23.4 20.0 38.5 DAY 7 17 13 15 24 30 2 21 1 1 11 7 DIF. BETWEEN (MAX.-MIN.) (C) 12.2 13.0 17.3 16.6 18.7 19.2 14.8 17.2 19.1 18.8 19.1 18.2 17.0 MEAN DAILY TEMP. (MDT) (C) 3.0 5.2 9.5 14.0 21.2 24.6 27.4 26.9 22.7 15.9 10.1 5.1 15.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 27.0 113.1 198.0 182.8 67.6 0.0 0.0 0.0 588.5 HEATING DEG. DAYS(BASE 18 0C) 466.3 358.2 264.4 121.2 3.5 0.0 0.0 0.0 0.0 75.2 235.5 400.6 1924.9 DEWPOINT (MEAN C) -6.8 -5.5 -5.5 -1.5 2.9 2.6 6.1 6.8 3.2 1.2 -1.9 -6.6 -0.4 MIXING RATIO (G/KG) 3.03 3.40 3.32 4.42 6.07 5.76 7.50 7.85 6.24 5.36 4.27 3.00 5.02 VAPOUR PRESSURE (HPA) 3.95 4.42 4.33 5.74 7.84 7.44 9.63 10.11 8.07 6.98 5.57 3.91 6.50 SATURATION DEF. (HPA) 4.81 6.07 11.00 15.00 25.99 35.19 34.73 34.31 28.58 16.65 10.77 7.80 19.24 RELATIVE HUMIDITY (MEAN %) 49 46 33 33 25 19 23 24 23 32 38 38 32 RELATIVE HUMIDITY (MAX. %) 75 73 59 62 43 26 31 33 34 50 57 59 50 RELATIVE HUMIDITY (MIN. %) 32 29 20 20 17 15 18 19 17 22 26 25 22 RELATIVE HUMIDITY (MEAN% 03UTC) 73 70 58 60 39 26 30 33 33 49 53 58 49 RELATIVE HUMIDITY (MEAN% 09UTC) 41 38 26 26 20 17 21 21 20 25 33 30 27 RELATIVE HUMIDITY (MEAN% 15UTC) 40 35 25 25 21 16 20 20 20 30 37 36 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.5 32.5 8.0 22.0 0.0 0.0 3.0 0.0 0.0 0.0 1.0 1.0 108.0 DAYS WITH PRECIPITATION >=10 1 2 0 1 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 3 2 1 2 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 8 5 2 3 0 0 1 0 0 0 1 1 21 DAYS WITH PRECIPITATION 8 5 2 3 0 0 1 0 0 0 1 1 21 GREATEST DAILY PRECIPITATION 14.0 15.0 7.0 12.0 0.0 0.0 3.0 0.0 0.0 0.0 1.0 1.0 15.0 DAY 28 6 18 4 ** ** 14 ** ** ** 29 22 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 3 3 4 1 2 0 1 0 0 0 3 17 WIND DIRECTION (PREVAILING) 270 270 270 270 270 360 360 360 360 180 270 270 270 PREVAILING WIND SPEED(KNOTS) 13.0 14.9 14.9 15.3 8.9 15.0 13.9 14.1 10.5 7.4 7.5 12.0 12.1 PREVAILING WIND PERCENT 20.0 22.9 23.9 39.3 27.6 25.3 35.5 22.6 19.3 16.1 10.7 25.2 18.4 CALMS PERCENT OF WIND 26.5 27.1 19.4 20.7 24.4 28.7 14.8 23.9 38.0 39.4 60.7 38.7 30.1 NO. OF WIND OBSERVATION 155 140 155 150 156 150 155 155 150 155 150 155 1826 VECTOR WIND DIRECTION (MEAN) 218 226 255 254 249 331 5 32 324 222 216 242 259 VECTOR WIND MAGNITUDE(KNOTS) 3.3 4.4 3.9 7.1 2.8 3.6 3.5 1.3 1.3 1.8 1.0 4.1 2.2 WIND STEADINESES (MEAN %) 40.2 49.4 41.1 74.7 37.3 43.9 38.0 16.5 24.5 36.0 33.3 65.1 29.7 WIND SPEED (MEAN KNOTS) 8.2 8.9 9.5 9.5 7.5 8.2 9.2 7.9 5.3 5.0 3.0 6.3 7.4 FASTEST WIND DIRECTION 220 190 360 270 220 20 360 360 360 300 130 260 270 FASTEST WIND SPEED (KNOTS) 39 31 43 51 27 31 31 31 19 16 10 39 51 DAY 10 15 3 16 13 23 9 4 23 15 11 25 DAYS WITH SKY CLEAR (0-2)/8 11 16 23 15 26 29 26 24 28 30 26 21 275 DAYS WITH P.CLOUDY (3-6)/8 15 7 6 13 5 1 5 7 2 1 3 9 74 DAYS WITH CLOUDY (7-8)/8 5 5 2 2 0 0 0 0 0 0 1 1 16 DAYS WITH VISIBILITY =< 2 KM 1 0 0 1 0 0 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 210.0 222.2 284.5 276.0 370.1 368.6 340.3 329.4 329.2 317.8 ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.8 812.5 815.3 813.6 813.3 811.3 809.5 811.4 813.7 817.8 818.5 816.4 814.0 MAX. QFE PRESSURE IN HPA 821.3 818.7 822.8 819.0 817.5 816.1 814.9 815.4 818.5 823.6 824.5 824.0 824.5 DAY-HOUR 26- 6 8- 6 10- 6 3- 9 18- 6 4- 6 15- 6 4- 6 26- 6 19- 6 23- 6 5- 6 MIN. QFE PRESSURE IN HPA 808.4 806.0 808.2 807.7 807.7 806.1 803.3 808.4 809.1 811.7 811.1 809.8 803.3 DAY-HOUR 17-12 24-12 27-12 6-12 12-15 26-15 5-15 7-15 3-15 1-12 1-12 25-12 MEAN QNH PRESSURE IN HPA 1017.0 1014.2 1017.6 1015.6 1015.1 1012.8 1010.6 1012.9 1015.6 1020.6 1021.4 1018.9 1016.0 MAX. QNH PRESSURE IN HPA 1024.8 1021.6 1026.5 1022.0 1020.2 1018.5 1017.1 1017.7 1021.4 1027.5 1028.6 1028.0 1028.6 DAY-HOUR 26- 6 8- 6 10- 6 3- 9 18- 6 4- 6 15- 6 4- 6 26- 6 19- 6 23- 6 5- 6 MIN. QNH PRESSURE IN HPA 1009.3 1006.4 1009.1 1008.5 1008.5 1006.6 1003.2 1009.3 1010.2 1013.3 1012.5 1011.0 1003.2 DAY-HOUR 17-12 24-12 27-12 6-12 12-15 26-15 5-15 7-15 3-15 1-12 1-12 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 814.9 812.8 815.8 814.0 814.0 812.2 810.4 812.3 814.5 818.6 819.0 817.0 814.6 MAX. QFE PRESSURE IN HPA 819.4 817.6 821.3 817.2 816.8 815.4 814.4 815.1 817.9 822.5 823.5 822.8 823.5 DAY 20 1 10 24 18 5 15 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 811.0 806.8 811.0 809.1 807.8 808.8 805.4 809.8 811.2 814.6 813.4 810.3 805.4 DAY 17 16 3 10 13 27 5 1 4 1 1 26 MEAN QNH PRESSURE IN HPA 1017.1 1014.5 1018.1 1016.0 1016.0 1013.8 1011.7 1014.0 1016.6 1021.5 1022.0 1019.6 1016.7 MAX. QNH PRESSURE IN HPA 1022.5 1020.3 1024.8 1019.8 1019.4 1017.7 1016.5 1017.3 1020.7 1026.2 1027.4 1026.5 1027.4 DAY 20 1 10 24 18 5 15 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1012.4 1007.4 1012.4 1010.2 1008.6 1009.8 1005.7 1011.0 1012.7 1016.7 1015.3 1011.6 1005.7 DAY 17 16 3 10 13 27 5 1 4 1 1 26 MEAN QFF PRESSURE IN HPA 1018.1 1013.4 1014.1 1007.7 1001.5 996.6 993.0 996.0 1002.3 1012.8 1018.2 1019.5 1007.8 MAX. QFF PRESSURE IN HPA 1028.1 1022.5 1022.8 1013.8 1006.3 1003.3 999.0 1000.9 1009.3 1020.9 1026.3 1034.3 1034.3 DAY 31 1 22 4 16 2 15 16 28 19 23 29 MIN. QFF PRESSURE IN HPA 1010.6 1003.8 1007.8 1001.1 993.6 989.6 985.3 992.2 995.2 1003.9 1009.8 1006.8 985.3 DAY 15 16 25 16 13 30 5 1 4 1 1 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.2 813.9 816.9 815.0 814.7 812.7 810.8 812.8 815.2 819.5 820.0 817.9 815.5 MAX. QFE PRESSURE IN HPA 821.3 818.7 822.8 818.2 817.5 816.1 814.9 815.4 818.5 823.6 824.5 824.0 824.5 DAY 26 8 10 27 18 4 15 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 811.5 807.2 811.6 810.6 808.8 809.3 806.1 810.0 812.0 815.2 814.0 811.9 806.1 DAY 17 16 27 10 13 27 5 1 4 1 1 26 MEAN QNH PRESSURE IN HPA 1018.6 1015.9 1019.4 1017.2 1016.8 1014.4 1012.2 1014.6 1017.5 1022.6 1023.2 1020.7 1017.8 MAX. QNH PRESSURE IN HPA 1024.8 1021.6 1026.5 1021.0 1020.2 1018.5 1017.1 1017.7 1021.4 1027.5 1028.6 1028.0 1028.6 DAY 26 8 10 27 18 4 15 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1013.0 1007.9 1013.1 1011.9 1009.8 1010.4 1006.6 1011.2 1013.6 1017.5 1016.0 1013.5 1006.6 DAY 17 16 27 10 13 27 5 1 4 1 1 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 814.9 812.8 815.7 814.0 813.6 811.7 809.7 811.6 813.9 817.9 818.5 816.5 814.2 MAX. QFE PRESSURE IN HPA 820.6 817.5 821.7 819.0 816.7 815.3 813.9 814.1 817.1 822.1 823.1 822.4 823.1 DAY 26 1 10 3 18 4 15 4 27 19 23 5 MIN. QFE PRESSURE IN HPA 809.8 807.4 810.7 809.4 807.7 808.2 805.4 809.4 810.9 813.7 812.7 811.8 805.4 DAY 16 16 27 16 13 30 5 1 4 1 1 25 MEAN QNH PRESSURE IN HPA 1017.1 1014.6 1018.1 1016.0 1015.5 1013.2 1010.9 1013.2 1015.9 1020.7 1021.5 1019.1 1016.3 MAX. QNH PRESSURE IN HPA 1023.9 1020.2 1025.2 1022.0 1019.2 1017.6 1015.9 1016.1 1019.7 1025.7 1026.9 1026.1 1026.9 DAY 26 1 10 3 18 4 15 4 27 19 23 5 MIN. QNH PRESSURE IN HPA 1011.0 1008.1 1012.1 1010.5 1008.5 1009.1 1005.7 1010.5 1012.3 1015.7 1014.5 1013.4 1005.7 DAY 16 16 27 16 13 30 5 1 4 1 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.7 811.1 813.9 812.5 812.0 810.2 808.4 810.1 812.3 816.4 817.2 815.1 812.7 MAX. QFE PRESSURE IN HPA 819.5 815.9 819.3 816.9 814.8 814.2 812.6 812.7 816.0 820.7 821.6 821.0 821.6 DAY 26 8 10 3 17 4 15 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 808.4 806.0 808.2 807.7 807.9 806.6 803.8 808.4 809.5 811.7 811.1 809.8 803.8 DAY 17 24 27 6 12 30 5 25 4 1 1 25 MEAN QNH PRESSURE IN HPA 1015.6 1012.6 1015.9 1014.3 1013.7 1011.4 1009.3 1011.4 1014.0 1018.9 1019.8 1017.3 1014.5 MAX. QNH PRESSURE IN HPA 1022.6 1018.3 1022.4 1019.5 1017.0 1016.3 1014.3 1014.5 1018.4 1024.0 1025.1 1024.4 1025.1 DAY 26 8 10 3 17 4 15 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1009.3 1006.4 1009.1 1008.5 1008.7 1007.2 1003.8 1009.3 1010.6 1013.3 1012.5 1011.0 1003.8 DAY 17 24 27 6 12 30 5 25 4 1 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.4 811.7 814.4 812.8 812.1 810.0 808.4 810.2 812.5 816.8 817.9 815.7 813.1 MAX. QFE PRESSURE IN HPA 820.1 816.4 819.8 817.0 815.0 814.3 812.3 813.2 816.3 821.3 822.3 821.3 822.3 DAY 26 3 10 3 17 4 15 4 27 19 23 5 MIN. QFE PRESSURE IN HPA 809.5 806.5 808.5 808.1 807.7 806.1 803.3 808.4 809.1 812.5 812.1 810.5 803.3 DAY 17 23 27 6 12 26 5 7 3 1 1 25 MEAN QNH PRESSURE IN HPA 1016.4 1013.3 1016.5 1014.6 1013.7 1011.2 1009.3 1011.4 1014.2 1019.3 1020.6 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1023.3 1018.9 1023.0 1019.6 1017.2 1016.4 1014.0 1015.1 1018.8 1024.8 1025.9 1024.8 1025.9 DAY 26 3 10 3 17 4 15 4 27 19 23 5 MIN. QNH PRESSURE IN HPA 1010.6 1007.0 1009.4 1008.9 1008.5 1006.6 1003.2 1009.3 1010.2 1014.2 1013.7 1011.8 1003.2 DAY 17 23 27 6 12 26 5 7 3 1 1 25 MEAN QFF PRESSURE IN HPA 1017.5 1012.0 1012.3 1006.3 999.1 993.6 990.5 993.3 999.6 1010.4 1016.7 1017.8 1005.8 MAX. QFF PRESSURE IN HPA 1029.4 1019.6 1020.0 1015.9 1003.5 1001.3 996.9 997.6 1007.0 1019.5 1024.9 1029.9 1029.9 DAY 26 8 10 3 16 4 14 15 25 19 23 28 MIN. QFF PRESSURE IN HPA 1010.4 1003.4 1003.9 999.5 992.8 986.0 983.0 990.2 992.1 1001.5 1008.0 1009.4 983.0 DAY 15 23 25 15 28 30 5 7 3 1 1 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.9 6.5 11.2 18.1 23.1 28.6 31.3 27.1 22.2 15.7 9.3 6.4 17.1 MINIMUN AIR TEMPERATURE (C) -1.8 -1.9 3.6 7.5 9.1 14.9 19.1 16.8 11.3 6.8 0.8 1.3 7.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 8 2 0 0 0 0 11 DAYS WITH MINIMUM TEMP. <=-4 11 10 0 0 0 0 0 0 0 0 1 7 29 DAYS WITH FREEZING MIN.<= 0 19 19 8 0 0 0 0 0 0 0 11 12 69 TEMPERATURE RECORDS LOWEST(C) -14.6 -12.6 -3.6 0.6 2.0 9.8 14.4 8.6 4.6 2.4 -4.6 -7.4 -14.6 DAY 7 16 8 12 24 13 29 26 29 31 17 30 MAXIMUM AIR TEMPERATURE (C) 10.6 11.6 16.1 23.4 28.5 33.7 36.8 34.9 31.1 24.1 17.9 12.3 23.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 27 30 31 22 0 0 0 119 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 16.0 17.4 22.8 29.0 33.6 36.4 40.0 37.6 37.4 26.5 23.0 18.4 40.0 DAY 21 27 22 27 31 4 11 11 9 10 1 9 DIF. BETWEEN (MAX.-MIN.) (C) 12.4 13.5 12.5 15.9 19.4 18.8 17.7 18.1 19.8 17.3 17.1 11.0 16.1 MEAN DAILY TEMP. (MDT) (C) 4.4 4.9 9.8 15.4 18.8 24.3 28.0 25.9 21.2 15.4 9.4 6.8 15.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.1 11.0 99.7 207.3 151.3 36.2 0.0 0.0 0.0 507.6 HEATING DEG. DAYS(BASE 18 0C) 422.2 367.5 253.3 89.6 23.2 0.0 0.0 0.0 11.2 79.3 259.4 346.4 1852.0 DEWPOINT (MEAN C) -3.4 -5.4 0.1 1.3 0.8 3.1 5.5 1.8 -5.1 -0.3 -2.6 -0.3 -0.4 MIXING RATIO (G/KG) 4.11 3.47 5.07 5.38 5.15 6.07 7.27 5.86 3.49 4.79 3.98 4.87 4.96 VAPOUR PRESSURE (HPA) 5.34 4.51 6.57 6.99 6.66 7.84 9.34 7.55 4.54 6.25 5.20 6.34 6.43 SATURATION DEF. (HPA) 4.43 5.78 7.42 15.18 23.09 32.91 38.16 30.17 24.38 12.70 7.47 3.85 17.13 RELATIVE HUMIDITY (MEAN %) 56 47 51 37 25 21 22 22 18 37 47 67 38 RELATIVE HUMIDITY (MAX. %) 75 74 80 62 41 30 34 34 32 57 68 88 56 RELATIVE HUMIDITY (MIN. %) 41 30 33 23 17 16 14 13 10 22 29 43 24 RELATIVE HUMIDITY (MEAN% 03UTC) 73 74 79 62 41 30 34 32 29 53 66 84 55 RELATIVE HUMIDITY (MEAN% 09UTC) 48 37 42 29 20 17 18 15 13 27 35 50 29 RELATIVE HUMIDITY (MEAN% 15UTC) 52 41 43 27 19 18 17 16 13 28 37 58 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 50.8 18.4 33.0 8.0 0.0 0.0 0.0 0.0 0.0 8.0 14.0 21.3 153.5 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 1 0 2 DAYS WITH PRECIPITATION >= 5 5 1 3 0 0 0 0 0 0 1 1 1 12 DAYS WITH PRECIPITATION >= 1 9 5 9 3 0 0 0 0 0 1 1 7 35 DAYS WITH PRECIPITATION 9 6 9 3 0 0 0 0 0 1 1 10 39 GREATEST DAILY PRECIPITATION 10.0 9.0 8.0 4.0 0.0 0.0 0.0 0.0 0.0 8.0 14.0 7.0 14.0 DAY 15 22 28 1 ** ** ** ** ** 16 24 19 DAY WITH THUNDER STORM 0 0 2 0 0 0 0 0 0 1 0 1 4 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 2 2 DAYS WITH DUST 0 0 2 2 5 1 1 2 3 4 0 3 23 WIND DIRECTION (PREVAILING) 225 180 180 270 270 360 360 360 360 360 180 180 180 PREVAILING WIND SPEED(KNOTS) 14.0 10.0 11.2 13.4 13.2 14.5 17.3 13.8 13.9 11.7 8.1 10.5 9.1 PREVAILING WIND PERCENT 18.1 24.3 26.5 26.7 30.3 20.7 20.6 34.3 29.2 13.7 10.8 22.6 13.8 CALMS PERCENT OF WIND 36.1 18.6 14.2 19.3 21.3 30.7 23.9 28.6 37.1 50.0 65.4 42.7 34.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 248 240 248 240 248 2284 VECTOR WIND DIRECTION (MEAN) 212 215 230 244 263 323 359 12 355 326 188 190 257 VECTOR WIND MAGNITUDE(KNOTS) 3.4 5.6 4.9 4.6 6.1 1.8 1.5 4.9 4.0 1.6 0.8 3.6 1.8 WIND STEADINESES (MEAN %) 50.7 59.6 47.6 50.5 65.6 25.4 18.3 64.5 59.7 36.4 29.6 59.0 24.7 WIND SPEED (MEAN KNOTS) 6.7 9.4 10.3 9.1 9.3 7.1 8.2 7.6 6.7 4.4 2.7 6.1 7.3 FASTEST WIND DIRECTION 240 250 220 280 230 360 360 360 360 360 180 210 230 FASTEST WIND SPEED (KNOTS) 35 49 39 31 54 35 39 33 43 39 16 39 54 DAY 24 1 15 1 23 18 22 23 26 4 4 15 DAYS WITH SKY CLEAR (0-2)/8 13 8 11 18 23 26 31 31 29 23 25 10 248 DAYS WITH P.CLOUDY (3-6)/8 11 15 10 11 8 4 0 0 1 7 4 15 86 DAYS WITH CLOUDY (7-8)/8 7 5 10 1 0 0 0 0 0 1 1 6 31 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 2 0 0 0 0 1 0 1 5 DURATION OF SUNSHINE HOURS ****** ****** 197.9 270.7 324.5 343.6 354.0 349.0 306.2 264.8 268.6 156.3 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.0 814.5 813.1 814.7 812.1 811.2 809.2 810.8 815.0 817.7 818.0 815.8 813.9 MAX. QFE PRESSURE IN HPA 821.2 822.7 818.4 819.6 816.7 816.0 814.0 815.0 818.6 821.7 822.3 823.2 823.2 DAY-HOUR 12- 6 15- 6 29- 6 18- 6 9- 6 23- 6 1- 3 31-18 17- 6 20- 6 14- 6 7- 6 MIN. QFE PRESSURE IN HPA 806.5 807.3 807.5 808.8 808.0 805.8 803.5 806.3 809.6 814.1 812.7 808.9 803.5 DAY-HOUR 25-12 8-12 7- 9 12-15 28-15 12-12 14-12 11-15 3-12 15-12 8-12 22-12 MEAN QNH PRESSURE IN HPA 1017.2 1016.6 1014.9 1016.8 1013.7 1012.7 1010.2 1012.2 1017.2 1020.4 1020.8 1018.1 1015.9 MAX. QNH PRESSURE IN HPA 1024.6 1026.4 1021.3 1022.7 1019.2 1018.4 1016.0 1017.2 1021.5 1025.2 1025.9 1027.0 1027.0 DAY-HOUR 12- 6 15- 6 29- 6 18- 6 9- 6 23- 6 1- 3 31-18 17- 6 20- 6 14- 6 7- 6 MIN. QNH PRESSURE IN HPA 1007.0 1008.0 1008.2 1009.8 1008.8 1006.2 1003.4 1006.8 1010.7 1016.1 1014.5 1009.9 1003.4 DAY-HOUR 25-12 8-12 7- 9 12-15 28-15 12-12 14-12 11-15 3-12 15-12 8-12 22-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.9 1002.6 1010.4 1015.7 1015.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1001.9 1015.0 1017.5 1023.8 1024.0 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 31- 3 28- 3 28- 3 17- 3 24- 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 986.8 995.4 1005.4 1007.0 1004.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 12-12 3- 9 9-18 6-12 26- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 810.7 814.8 817.5 817.9 815.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.0 817.5 820.2 820.6 821.4 ****** DAY ** ** ** ** ** ** ** 31 28 28 14 8 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.1 811.5 815.2 814.0 809.4 ****** DAY ** ** ** ** ** ** ** 12 4 9 7 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.1 1016.9 1020.2 1020.7 1018.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1014.8 1020.2 1023.4 1023.9 1024.9 ****** DAY ** ** ** ** ** ** ** 31 28 28 14 8 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.9 1013.0 1017.5 1016.0 1010.5 ****** DAY ** ** ** ** ** ** ** 12 4 9 7 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.6 1002.2 1009.8 1015.0 1014.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.1 1011.2 1013.2 1020.3 1022.0 ****** DAY ** ** ** ** ** ** ** 28 28 28 25 8 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 988.0 996.8 1006.3 1007.9 1004.8 ****** DAY ** ** ** ** ** ** ** 12 10 8 7 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.2 814.9 813.4 815.2 812.7 812.1 810.3 811.7 815.6 818.2 818.5 816.0 814.5 MAX. QFE PRESSURE IN HPA 819.8 821.6 817.4 819.3 816.0 815.8 814.0 814.4 818.4 820.8 821.3 821.2 821.6 DAY 13 16 18 19 9 23 1 31 28 20 14 7 MIN. QFE PRESSURE IN HPA 806.7 808.5 808.1 811.1 808.6 808.0 806.1 809.5 812.1 816.0 814.4 811.6 806.1 DAY 26 8 7 12 23 12 14 12 4 4 8 22 MEAN QNH PRESSURE IN HPA 1017.5 1017.1 1015.3 1017.5 1014.5 1013.7 1011.6 1013.2 1018.0 1021.1 1021.5 1018.4 1016.6 MAX. QNH PRESSURE IN HPA 1023.0 1025.1 1020.1 1022.4 1018.4 1018.2 1016.0 1016.5 1021.3 1024.2 1024.8 1024.6 1025.1 DAY 13 16 18 19 9 23 1 31 28 20 14 7 MIN. QNH PRESSURE IN HPA 1007.3 1009.4 1008.9 1012.5 1009.5 1008.8 1006.6 1010.6 1013.7 1018.4 1016.5 1013.1 1006.6 DAY 26 8 7 12 23 12 14 12 4 4 8 22 MEAN QFF PRESSURE IN HPA 1017.1 1016.3 1010.3 1008.1 1001.5 996.9 992.6 996.4 1004.9 1012.8 1018.0 1016.3 1007.6 MAX. QFF PRESSURE IN HPA 1029.7 1031.6 1019.5 1014.5 1007.4 1002.8 998.8 1001.9 1015.0 1017.5 1023.8 1024.0 1031.6 DAY 7 15 18 2 9 23 1 31 28 28 17 24 MIN. QFF PRESSURE IN HPA 1004.6 1006.4 1003.9 1002.0 996.4 991.0 986.1 991.5 998.8 1008.4 1011.6 1010.7 986.1 DAY 26 8 7 28 23 12 15 12 8 4 6 2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.3 815.9 814.4 816.1 813.3 812.5 810.6 812.2 816.5 819.4 819.6 817.1 815.3 MAX. QFE PRESSURE IN HPA 821.2 822.7 818.4 819.6 816.7 816.0 814.0 814.6 818.6 821.7 822.3 823.2 823.2 DAY 12 15 29 18 9 23 1 23 17 20 14 7 MIN. QFE PRESSURE IN HPA 808.9 809.3 808.3 812.2 809.7 808.6 806.5 809.8 813.0 816.7 815.7 811.6 806.5 DAY 26 8 7 12 23 12 14 12 3 15 8 22 MEAN QNH PRESSURE IN HPA 1018.8 1018.3 1016.5 1018.6 1015.2 1014.2 1011.9 1013.9 1019.0 1022.4 1022.7 1019.7 1017.6 MAX. QNH PRESSURE IN HPA 1024.6 1026.4 1021.3 1022.7 1019.2 1018.4 1016.0 1016.7 1021.5 1025.2 1025.9 1027.0 1027.0 DAY 12 15 29 18 9 23 1 23 17 20 14 7 MIN. QNH PRESSURE IN HPA 1009.9 1010.4 1009.2 1013.9 1010.9 1009.5 1007.0 1011.0 1014.8 1019.2 1018.1 1013.1 1007.0 DAY 26 8 7 12 23 12 14 12 3 15 8 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 995.2 1004.0 1011.9 1017.3 1016.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.6 1011.8 1015.5 1021.4 1023.4 ****** DAY ** ** ** ** ** ** ** 24 28 28 17 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 990.5 998.1 1008.8 1010.4 1011.1 ****** DAY ** ** ** ** ** ** ** 12 8 10 6 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.2 814.8 813.5 815.2 812.4 811.5 809.5 811.2 815.3 818.1 818.3 815.8 814.2 MAX. QFE PRESSURE IN HPA 819.8 822.7 817.8 819.0 815.4 815.0 812.7 814.0 818.0 820.6 821.0 822.4 822.7 DAY 12 15 18 18 9 23 1 31 28 20 13 7 MIN. QFE PRESSURE IN HPA 807.7 808.3 807.5 811.1 809.3 807.5 805.5 808.6 811.3 815.6 814.2 810.0 805.5 DAY 26 8 7 11 23 12 14 12 3 15 8 22 MEAN QNH PRESSURE IN HPA 1017.4 1017.0 1015.4 1017.4 1014.1 1013.0 1010.6 1012.7 1017.6 1020.9 1021.2 1018.2 1016.3 MAX. QNH PRESSURE IN HPA 1023.0 1026.4 1020.6 1022.0 1017.7 1017.2 1014.5 1016.0 1020.8 1023.9 1024.4 1026.1 1026.4 DAY 12 15 18 18 9 23 1 31 28 20 13 7 MIN. QNH PRESSURE IN HPA 1008.5 1009.2 1008.2 1012.5 1010.4 1008.2 1005.8 1009.5 1012.8 1017.9 1016.3 1011.2 1005.8 DAY 26 8 7 11 23 12 14 12 3 15 8 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.6 1002.1 1009.9 1015.3 1014.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.9 1010.5 1013.0 1020.4 1021.6 ****** DAY ** ** ** ** ** ** ** 31 28 31 24 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 989.1 995.4 1006.8 1009.2 1006.9 ****** DAY ** ** ** ** ** ** ** 12 3 4 8 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.9 813.2 811.9 813.4 811.0 810.0 807.9 809.6 813.7 816.6 816.8 814.5 812.7 MAX. QFE PRESSURE IN HPA 819.0 821.2 817.0 817.4 814.2 814.0 811.6 812.6 816.7 818.9 819.6 822.0 822.0 DAY 12 15 29 18 25 23 1 31 28 27 13 7 MIN. QFE PRESSURE IN HPA 806.5 807.3 807.8 809.2 808.3 805.8 803.5 806.6 809.6 814.1 812.7 808.9 803.5 DAY 25 8 7 12 28 12 14 12 3 15 8 22 MEAN QNH PRESSURE IN HPA 1015.9 1015.0 1013.5 1015.3 1012.4 1011.3 1008.7 1010.7 1015.6 1019.1 1019.4 1016.6 1014.5 MAX. QNH PRESSURE IN HPA 1022.0 1024.6 1019.6 1020.1 1016.3 1016.0 1013.1 1014.3 1019.2 1021.9 1022.7 1025.6 1025.6 DAY 12 15 29 18 25 23 1 31 28 27 13 7 MIN. QNH PRESSURE IN HPA 1007.0 1008.0 1008.6 1010.3 1009.2 1006.2 1003.4 1007.2 1010.7 1016.1 1014.5 1009.9 1003.4 DAY 25 8 7 12 28 12 14 12 3 15 8 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 992.3 1000.9 1008.6 1013.6 1012.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.2 1009.8 1011.5 1017.8 1021.4 ****** DAY ** ** ** ** ** ** ** 30 28 31 17 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 986.8 995.4 1005.4 1007.0 1006.4 ****** DAY ** ** ** ** ** ** ** 12 8 9 6 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.6 813.7 812.3 813.5 810.9 810.0 807.7 809.6 813.9 816.8 817.2 815.2 813.0 MAX. QFE PRESSURE IN HPA 820.0 821.6 817.2 817.4 814.4 814.1 811.4 813.0 816.7 819.3 820.1 822.0 822.0 DAY 12 15 29 18 8 22 1 31 28 20 13 7 MIN. QFE PRESSURE IN HPA 807.9 808.2 808.6 808.8 808.0 806.0 803.5 806.3 810.0 814.4 813.0 810.2 803.5 DAY 26 8 7 12 28 11 14 11 3 9 8 22 MEAN QNH PRESSURE IN HPA 1016.7 1015.7 1014.0 1015.4 1012.4 1011.2 1008.5 1010.8 1015.9 1019.4 1019.9 1017.5 1014.8 MAX. QNH PRESSURE IN HPA 1023.2 1025.1 1019.8 1020.1 1016.5 1016.1 1012.9 1014.8 1019.2 1022.4 1023.3 1025.6 1025.6 DAY 12 15 29 18 8 22 1 31 28 20 13 7 MIN. QNH PRESSURE IN HPA 1008.7 1009.1 1009.5 1009.8 1008.8 1006.4 1003.4 1006.8 1011.2 1016.5 1014.8 1011.5 1003.4 DAY 26 8 7 12 28 11 14 11 3 9 8 22 MEAN QFF PRESSURE IN HPA 1016.2 1014.9 1009.1 1005.9 999.2 994.1 989.4 993.8 1002.9 1010.9 1016.4 1015.4 1005.7 MAX. QFF PRESSURE IN HPA 1027.4 1030.5 1017.2 1011.4 1005.6 1001.1 995.1 1000.2 1012.1 1015.2 1021.2 1021.7 1030.5 DAY 12 15 17 2 25 23 1 31 28 27 13 7 MIN. QFF PRESSURE IN HPA 1005.8 1006.6 1002.9 997.8 994.0 987.8 983.3 988.0 995.8 1006.7 1009.8 1008.8 983.3 DAY 24 28 6 28 28 11 14 11 8 4 6 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 810.7 815.0 817.7 818.0 816.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 815.0 817.6 820.3 820.7 822.4 ****** DAY ** ** ** ** ** ** ** 31 30 16 24 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 807.4 811.4 815.5 813.8 810.4 ****** DAY ** ** ** ** ** ** ** 11 3 8 8 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.1 1017.2 1020.4 1020.8 1018.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1017.2 1020.3 1023.6 1024.0 1026.1 ****** DAY ** ** ** ** ** ** ** 31 30 16 24 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.1 1012.9 1017.8 1015.8 1011.7 ****** DAY ** ** ** ** ** ** ** 11 3 8 8 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.4 1002.3 1010.0 1015.4 1015.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.6 1011.1 1014.6 1021.4 1022.3 ****** DAY ** ** ** ** ** ** ** 31 28 31 24 23 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 987.1 996.3 1005.4 1008.8 1008.1 ****** DAY ** ** ** ** ** ** ** 11 8 9 5 25 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 810.9 814.9 817.6 817.9 815.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 814.4 817.7 820.2 820.6 822.0 ****** DAY ** ** ** ** ** ** ** 31 27 27 13 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.1 811.0 815.5 813.8 809.7 ****** DAY ** ** ** ** ** ** ** 11 3 8 8 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.3 1017.2 1020.3 1020.7 1018.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1016.5 1020.4 1023.4 1023.9 1025.6 ****** DAY ** ** ** ** ** ** ** 31 27 27 13 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.9 1012.4 1017.8 1015.8 1010.9 ****** DAY ** ** ** ** ** ** ** 11 3 8 8 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.3 1001.8 1009.5 1014.9 1014.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.2 1010.8 1013.9 1020.9 1021.9 ****** DAY ** ** ** ** ** ** ** 31 28 31 24 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 987.4 995.6 1005.4 1008.7 1006.0 ****** DAY ** ** ** ** ** ** ** 11 7 9 8 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.8 3.7 6.7 12.8 18.2 25.0 27.7 25.8 19.9 14.7 10.0 5.0 14.2 MINIMUN AIR TEMPERATURE (C) -3.9 -3.6 -0.5 5.2 10.1 14.8 17.7 16.8 10.3 4.8 0.9 -0.6 6.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 2 3 0 0 0 0 7 DAYS WITH MINIMUM TEMP. <=-4 18 15 8 0 0 0 0 0 0 0 3 7 51 DAYS WITH FREEZING MIN.<= 0 24 22 17 1 0 0 0 0 0 1 12 16 93 TEMPERATURE RECORDS LOWEST(C) -17.8 -11.0 -11.0 -0.6 6.0 11.4 13.6 10.4 4.4 0.0 -6.6 -7.6 -17.8 DAY 29 17 13 8 5 1 23 22 11 26 19 7 MAXIMUM AIR TEMPERATURE (C) 6.3 11.6 13.6 20.2 25.2 33.0 34.7 33.2 28.5 24.3 19.2 11.2 21.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 30 31 29 10 0 0 0 102 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 12.2 16.6 19.4 26.6 30.0 36.6 36.6 36.0 31.0 28.4 22.6 16.0 36.6 DAY 20 23 30 14 20 29 3 2 29 3 14 2 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 15.2 14.1 15.0 15.1 18.2 17.0 16.4 18.2 19.5 18.3 11.8 15.7 MEAN DAILY TEMP. (MDT) (C) 1.2 4.0 6.5 12.7 17.7 23.9 26.2 25.0 19.4 14.5 10.1 5.3 13.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.9 87.8 162.3 123.9 2.2 0.0 0.0 0.0 378.2 HEATING DEG. DAYS(BASE 18 0C) 521.0 406.2 355.0 158.5 43.0 0.0 0.0 0.0 7.2 108.5 238.2 393.4 2231.0 DEWPOINT (MEAN C) -5.0 -9.1 -6.4 -1.1 3.4 1.8 2.7 0.3 -4.9 -5.3 -8.0 -1.8 -2.8 MIXING RATIO (G/KG) 3.48 2.65 3.34 4.62 6.24 5.55 6.01 5.21 3.46 3.26 2.69 4.36 4.24 VAPOUR PRESSURE (HPA) 4.52 3.44 4.34 5.99 8.08 7.17 7.75 6.74 4.50 4.26 3.53 5.67 5.50 SATURATION DEF. (HPA) 2.35 5.23 6.08 9.90 13.93 26.32 30.86 27.91 20.30 14.02 9.85 3.48 14.19 RELATIVE HUMIDITY (MEAN %) 69 45 45 44 43 25 22 21 20 27 31 66 38 RELATIVE HUMIDITY (MAX. %) 88 71 74 75 70 40 33 34 32 41 49 87 58 RELATIVE HUMIDITY (MIN. %) 46 21 23 21 22 13 14 12 11 15 16 42 21 RELATIVE HUMIDITY (MEAN% 03UTC) 83 67 67 68 66 38 31 33 31 41 48 81 55 RELATIVE HUMIDITY (MEAN% 09UTC) 55 28 30 26 28 15 16 13 14 18 19 51 26 RELATIVE HUMIDITY (MEAN% 15UTC) 62 30 30 31 31 17 17 15 15 20 24 58 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 58.8 0.0 31.2 14.9 71.5 0.0 0.0 0.0 0.0 0.0 0.0 103.2 279.6 DAYS WITH PRECIPITATION >=10 2 0 1 0 2 0 0 0 0 0 0 3 8 DAYS WITH PRECIPITATION >= 5 2 0 1 2 4 0 0 0 0 0 0 4 13 DAYS WITH PRECIPITATION >= 1 9 0 3 2 5 0 0 0 0 0 0 10 29 DAYS WITH PRECIPITATION 10 0 6 7 5 0 0 0 0 0 0 12 40 GREATEST DAILY PRECIPITATION 22.0 0.0 22.0 8.0 41.0 0.0 0.0 0.0 0.0 0.0 0.0 34.4 41.0 DAY 21 ** 31 27 11 ** ** ** ** ** ** 22 DAY WITH THUNDER STORM 0 0 0 0 4 0 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 6 0 0 1 0 0 0 0 0 0 0 2 9 DAYS WITH DUST 3 9 6 10 7 7 4 9 0 0 1 0 56 WIND DIRECTION (PREVAILING) 180 180 270 270 270 180 360 360 360 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 9.0 15.7 12.4 13.3 10.2 9.1 12.0 15.6 11.6 7.6 7.6 7.8 9.1 PREVAILING WIND PERCENT 18.1 16.8 21.4 19.2 20.2 16.7 27.0 30.6 30.8 13.3 13.8 17.7 12.4 CALMS PERCENT OF WIND 34.7 29.3 32.3 32.1 39.9 42.9 33.9 26.2 43.3 58.9 43.8 46.8 38.7 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 177 215 231 253 260 222 19 19 353 169 146 157 248 VECTOR WIND MAGNITUDE(KNOTS) 2.7 4.9 4.2 3.1 2.7 1.6 3.7 5.4 3.6 0.8 1.3 2.0 0.8 WIND STEADINESES (MEAN %) 42.9 55.1 58.3 43.7 44.3 30.2 55.2 59.3 61.0 25.0 28.3 47.6 12.9 WIND SPEED (MEAN KNOTS) 6.3 8.9 7.2 7.1 6.1 5.3 6.7 9.1 5.9 3.2 4.6 4.2 6.2 FASTEST WIND DIRECTION 270 180 250 270 250 360 360 360 360 50 240 250 180 FASTEST WIND SPEED (KNOTS) 43 68 39 39 27 31 29 39 27 14 33 27 68 DAY 1 25 10 10 6 13 15 4 4 12 26 28 DAYS WITH SKY CLEAR (0-2)/8 15 22 15 13 15 28 29 25 30 31 20 13 256 DAYS WITH P.CLOUDY (3-6)/8 8 6 10 11 11 2 2 6 0 0 10 9 75 DAYS WITH CLOUDY (7-8)/8 8 1 6 6 5 0 0 0 0 0 0 9 35 DAYS WITH VISIBILITY =< 2 KM 5 1 0 0 0 0 0 0 0 0 1 0 7 DURATION OF SUNSHINE HOURS 167.5 241.9 207.5 219.5 265.5 334.7 351.2 325.8 321.6 310.3 237.2 161.2 3143.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.0 812.7 812.9 813.4 814.6 811.3 810.1 811.9 815.2 816.6 818.5 815.8 813.9 MAX. QFE PRESSURE IN HPA 823.8 818.3 820.5 819.7 818.7 816.8 814.4 816.0 819.5 821.8 823.9 821.2 823.9 DAY-HOUR 10- 6 16- 6 13- 6 26- 6 14- 6 11- 6 6- 6 31-21 21- 6 30- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 807.0 806.2 806.9 806.3 808.7 804.2 805.7 806.7 811.7 810.9 812.0 810.4 804.2 DAY-HOUR 25-12 11-12 24-12 18-12 4-12 27-15 19-12 1-15 5-12 7-12 27-12 4-12 MEAN QNH PRESSURE IN HPA 1016.0 1014.4 1014.7 1015.3 1016.7 1012.8 1011.3 1013.4 1017.5 1019.2 1021.4 1018.2 1015.9 MAX. QNH PRESSURE IN HPA 1027.7 1021.2 1023.8 1022.8 1021.6 1019.4 1016.5 1018.4 1022.6 1025.4 1027.9 1024.6 1027.9 DAY-HOUR 10- 6 16- 6 13- 6 26- 6 14- 6 11- 6 6- 6 31-21 21- 6 30- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 1007.6 1006.7 1007.5 1006.8 1009.7 1004.3 1006.1 1007.3 1013.3 1012.3 1013.6 1011.7 1004.3 DAY-HOUR 25-12 11-12 24-12 18-12 4-12 27-15 19-12 1-15 5-12 7-12 27-12 4-12 MEAN QFF PRESSURE IN HPA 1017.5 1013.5 1011.5 1007.3 1004.6 996.1 992.6 996.1 1004.5 1010.0 1015.9 1016.2 1007.1 MAX. QFF PRESSURE IN HPA 1033.7 1023.9 1027.2 1014.9 1012.3 1004.4 999.4 1003.7 1010.0 1018.8 1023.5 1025.7 1033.7 DAY-HOUR 10- 6 13- 3 13- 3 12- 3 14- 6 7- 3 16- 3 31-18 2- 3 30- 3 19- 3 12- 3 MIN. QFF PRESSURE IN HPA 1005.9 1002.8 1000.5 995.1 999.4 986.0 987.4 989.1 999.6 1001.9 1007.1 1006.0 986.0 DAY-HOUR 2-21 25- 9 31- 0 18-12 31-12 28-12 19-12 1-12 17-21 7-12 15-21 4-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 813.7 812.5 812.6 813.1 814.3 811.3 810.0 811.7 814.9 816.3 818.3 815.7 813.7 MAX. QFE PRESSURE IN HPA 820.7 817.0 818.0 818.1 817.2 815.4 812.9 815.0 817.3 820.1 821.6 819.8 821.6 DAY 10 23 13 26 29 7 16 16 2 30 4 1 MIN. QFE PRESSURE IN HPA 809.7 808.0 807.4 807.6 810.6 805.3 807.1 807.9 812.0 812.2 813.3 812.7 805.3 DAY 25 11 25 19 5 28 19 2 7 7 27 6 MEAN QNH PRESSURE IN HPA 1015.6 1014.2 1014.4 1014.9 1016.3 1012.7 1011.3 1013.2 1017.1 1018.7 1021.1 1018.0 1015.6 MAX. QNH PRESSURE IN HPA 1024.0 1019.6 1020.8 1020.9 1019.8 1017.7 1014.7 1017.2 1020.0 1023.3 1025.1 1023.0 1025.1 DAY 10 23 13 26 29 7 16 16 2 30 4 1 MIN. QNH PRESSURE IN HPA 1010.9 1008.8 1008.1 1008.4 1011.9 1005.6 1007.8 1008.7 1013.6 1013.9 1015.2 1014.5 1005.6 DAY 25 11 25 19 5 28 19 2 7 7 27 6 MEAN QFF PRESSURE IN HPA 1016.5 1012.7 1010.8 1006.9 1004.3 996.3 992.7 995.7 1004.0 1009.2 1014.9 1015.4 1006.6 MAX. QFF PRESSURE IN HPA 1028.8 1021.3 1023.4 1013.5 1009.6 1002.8 996.3 1000.5 1008.8 1015.1 1019.4 1022.5 1028.8 DAY 10 13 13 21 11 7 16 16 2 30 19 12 MIN. QFF PRESSURE IN HPA 1006.7 1005.6 1000.5 998.7 999.4 986.0 988.6 991.4 1000.2 1003.3 1009.3 1007.2 986.0 DAY 1 11 31 18 27 28 26 3 9 7 16 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 814.1 813.1 813.2 813.8 815.1 812.2 810.9 812.6 816.0 817.2 819.0 816.0 814.4 MAX. QFE PRESSURE IN HPA 821.9 816.4 819.2 819.1 818.1 816.0 814.0 815.7 818.2 820.9 822.4 820.1 822.4 DAY 10 16 13 26 29 11 6 16 2 30 4 1 MIN. QFE PRESSURE IN HPA 809.7 808.0 808.1 808.4 811.4 806.7 807.9 809.0 813.5 813.1 814.0 812.0 806.7 DAY 25 11 22 19 5 28 19 2 6 7 27 9 MEAN QNH PRESSURE IN HPA 1016.2 1014.9 1015.1 1015.8 1017.3 1013.8 1012.3 1014.4 1018.4 1019.9 1021.9 1018.4 1016.5 MAX. QNH PRESSURE IN HPA 1025.5 1018.9 1022.2 1022.1 1020.9 1018.4 1016.0 1018.1 1021.0 1024.3 1026.1 1023.3 1026.1 DAY 10 16 13 26 29 11 6 16 2 30 4 1 MIN. QNH PRESSURE IN HPA 1010.9 1008.8 1008.9 1009.3 1012.9 1007.3 1008.7 1010.0 1015.4 1014.9 1016.0 1013.6 1007.3 DAY 25 11 22 19 5 28 19 2 6 7 27 9 MEAN QFF PRESSURE IN HPA 1018.6 1015.1 1012.9 1008.8 1005.9 997.7 994.4 998.1 1006.8 1012.2 1018.3 1017.5 1008.9 MAX. QFF PRESSURE IN HPA 1032.7 1023.9 1027.2 1014.9 1012.2 1004.4 999.4 1003.4 1010.0 1018.8 1023.5 1025.7 1032.7 DAY 10 13 13 12 14 7 16 22 2 30 19 12 MIN. QFF PRESSURE IN HPA 1008.3 1007.5 1000.7 1000.8 1002.1 988.5 991.3 992.8 1002.7 1005.1 1012.0 1008.9 988.5 DAY 1 11 31 18 27 28 19 2 9 7 16 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.3 814.1 814.4 814.7 815.7 812.7 811.3 813.3 816.8 818.4 820.0 817.2 815.3 MAX. QFE PRESSURE IN HPA 823.8 818.3 820.5 819.7 818.7 816.8 814.4 815.9 819.5 821.8 823.9 821.2 823.9 DAY 10 16 13 26 14 11 6 15 21 30 4 1 MIN. QFE PRESSURE IN HPA 810.1 809.4 809.0 809.0 811.9 806.7 808.2 809.3 814.3 814.2 814.6 813.1 806.7 DAY 25 11 31 19 4 27 19 2 6 7 27 4 MEAN QNH PRESSURE IN HPA 1017.6 1016.1 1016.5 1016.8 1018.0 1014.4 1012.8 1015.1 1019.4 1021.2 1023.2 1019.9 1017.6 MAX. QNH PRESSURE IN HPA 1027.7 1021.2 1023.8 1022.8 1021.6 1019.4 1016.5 1018.3 1022.6 1025.4 1027.9 1024.6 1027.9 DAY 10 16 13 26 14 11 6 15 21 30 4 1 MIN. QNH PRESSURE IN HPA 1011.3 1010.5 1010.0 1010.0 1013.5 1007.3 1009.1 1010.4 1016.4 1016.3 1016.7 1014.9 1007.3 DAY 25 11 31 19 4 27 19 2 6 7 27 4 MEAN QFF PRESSURE IN HPA 1019.3 1015.3 1013.3 1008.7 1005.6 997.3 993.6 997.5 1006.2 1011.6 1017.5 1018.0 1008.7 MAX. QFF PRESSURE IN HPA 1033.7 1023.8 1025.6 1013.9 1012.3 1003.6 997.6 1003.2 1009.7 1016.7 1022.7 1024.5 1033.7 DAY 10 13 13 20 14 6 16 31 2 29 29 11 MIN. QFF PRESSURE IN HPA 1009.8 1007.8 1002.7 999.8 1002.2 988.5 990.0 991.5 1003.0 1005.4 1009.9 1009.6 988.5 DAY 3 25 31 18 21 27 19 2 8 6 16 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 814.2 813.0 813.4 813.6 815.1 811.9 810.4 812.2 815.6 817.0 818.7 816.0 814.3 MAX. QFE PRESSURE IN HPA 822.0 817.2 819.0 819.5 818.0 815.8 813.7 815.2 818.4 820.4 822.6 819.7 822.6 DAY 10 16 13 26 29 11 6 15 28 30 4 11 MIN. QFE PRESSURE IN HPA 808.6 807.9 808.6 807.5 810.6 805.6 807.2 808.6 813.0 812.7 813.1 811.4 805.6 DAY 25 11 24 18 4 27 19 1 8 7 26 4 MEAN QNH PRESSURE IN HPA 1016.3 1014.8 1015.3 1015.5 1017.3 1013.5 1011.7 1013.9 1017.9 1019.6 1021.6 1018.4 1016.3 MAX. QNH PRESSURE IN HPA 1025.6 1019.8 1022.0 1022.6 1020.8 1018.2 1015.7 1017.5 1021.3 1023.7 1026.3 1022.8 1026.3 DAY 10 16 13 26 29 11 6 15 28 30 4 11 MIN. QNH PRESSURE IN HPA 1009.5 1008.7 1009.5 1008.2 1011.9 1006.0 1007.9 1009.5 1014.8 1014.5 1014.9 1012.9 1006.0 DAY 25 11 24 18 4 27 19 1 8 7 26 4 MEAN QFF PRESSURE IN HPA 1017.1 1013.3 1011.7 1007.0 1005.0 996.6 992.4 995.8 1004.0 1009.5 1015.1 1015.8 1007.0 MAX. QFF PRESSURE IN HPA 1030.1 1022.1 1023.2 1013.5 1011.5 1002.8 996.7 1001.7 1007.6 1014.7 1020.4 1022.8 1030.1 DAY 10 6 13 26 14 6 16 31 2 29 29 11 MIN. QFF PRESSURE IN HPA 1008.2 1002.8 1004.2 996.4 1000.9 987.8 988.4 989.8 1000.9 1003.5 1008.9 1006.5 987.8 DAY 3 25 31 18 7 27 19 1 8 7 16 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.1 811.3 811.6 812.1 813.6 810.4 809.1 810.7 814.1 815.5 817.2 814.6 812.8 MAX. QFE PRESSURE IN HPA 820.5 815.5 817.1 817.8 816.8 814.3 811.8 814.1 816.8 818.8 821.0 818.4 821.0 DAY 10 16 13 26 28 6 6 15 21 29 4 11 MIN. QFE PRESSURE IN HPA 807.0 806.2 806.9 806.3 808.7 804.5 805.7 806.9 811.7 810.9 812.0 810.4 804.5 DAY 25 11 24 18 4 27 19 1 5 7 27 4 MEAN QNH PRESSURE IN HPA 1014.9 1012.8 1013.2 1013.7 1015.6 1011.7 1010.1 1012.1 1016.1 1017.8 1019.8 1016.7 1014.6 MAX. QNH PRESSURE IN HPA 1023.8 1017.8 1019.7 1020.6 1019.4 1016.4 1013.4 1016.1 1019.4 1021.8 1024.4 1021.3 1024.4 DAY 10 16 13 26 28 6 6 15 21 29 4 11 MIN. QNH PRESSURE IN HPA 1007.6 1006.7 1007.5 1006.8 1009.7 1004.6 1006.1 1007.5 1013.3 1012.3 1013.6 1011.7 1004.6 DAY 25 11 24 18 4 27 19 1 5 7 27 4 MEAN QFF PRESSURE IN HPA 1015.8 1011.3 1009.6 1005.6 1003.6 995.2 991.5 994.6 1003.0 1008.3 1013.6 1014.1 1005.5 MAX. QFF PRESSURE IN HPA 1027.3 1019.7 1020.5 1011.5 1010.8 1001.5 994.3 1000.9 1006.0 1013.3 1018.5 1021.3 1027.3 DAY 10 6 13 20 11 6 15 31 2 30 29 11 MIN. QFF PRESSURE IN HPA 1008.9 1003.4 1002.1 995.1 999.4 986.0 987.4 989.1 999.7 1001.9 1008.1 1006.0 986.0 DAY 2 25 30 18 31 28 19 1 4 7 15 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 813.6 811.8 811.9 812.4 813.7 810.1 808.9 810.7 814.3 815.7 817.8 815.5 813.0 MAX. QFE PRESSURE IN HPA 820.9 816.3 817.5 818.0 816.8 814.3 811.6 814.1 816.5 819.2 821.5 819.0 821.5 DAY 10 16 12 26 28 6 15 15 28 29 4 11 MIN. QFE PRESSURE IN HPA 808.3 806.5 806.9 806.3 808.7 804.2 806.0 806.7 811.8 810.9 812.9 811.3 804.2 DAY 25 11 24 18 4 27 19 1 6 7 26 9 MEAN QNH PRESSURE IN HPA 1015.6 1013.3 1013.5 1014.1 1015.7 1011.3 1009.9 1012.0 1016.3 1018.1 1020.6 1017.8 1014.8 MAX. QNH PRESSURE IN HPA 1024.3 1018.8 1020.2 1020.8 1019.4 1016.4 1013.1 1016.1 1019.0 1022.2 1025.0 1022.0 1025.0 DAY 10 16 12 26 28 6 15 15 28 29 4 11 MIN. QNH PRESSURE IN HPA 1009.2 1007.0 1007.5 1006.8 1009.7 1004.3 1006.4 1007.3 1013.4 1012.3 1014.7 1012.8 1004.3 DAY 25 11 24 18 4 27 19 1 6 7 26 9 MEAN QFF PRESSURE IN HPA 1017.9 1013.5 1011.2 1007.1 1004.3 995.0 992.0 995.8 1004.6 1010.4 1016.9 1016.8 1007.1 MAX. QFF PRESSURE IN HPA 1030.9 1021.7 1022.8 1013.6 1011.3 1002.1 996.3 1002.4 1007.1 1016.8 1021.9 1024.6 1030.9 DAY 10 16 12 8 11 6 16 31 28 30 4 11 MIN. QFF PRESSURE IN HPA 1007.8 1005.9 1003.2 997.5 999.4 986.9 989.1 990.0 1001.0 1002.9 1010.0 1009.1 986.9 DAY 2 25 30 18 31 27 19 1 6 7 15 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 814.2 812.8 813.0 813.6 814.6 811.0 810.0 811.8 815.2 816.6 818.6 816.1 814.0 MAX. QFE PRESSURE IN HPA 820.9 817.6 818.6 818.0 817.6 815.2 813.2 815.4 817.2 820.1 821.8 819.7 821.8 DAY 10 22 12 25 24 6 15 15 21 29 4 11 MIN. QFE PRESSURE IN HPA 809.8 807.8 807.6 807.4 810.3 805.0 807.0 807.2 812.6 812.5 813.6 812.1 805.0 DAY 23 11 24 18 4 27 19 1 17 6 26 9 MEAN QNH PRESSURE IN HPA 1016.3 1014.6 1014.8 1015.6 1016.8 1012.4 1011.2 1013.4 1017.5 1019.1 1021.5 1018.6 1016.0 MAX. QNH PRESSURE IN HPA 1024.3 1020.3 1021.5 1020.8 1020.3 1017.5 1015.1 1017.7 1019.8 1023.3 1025.4 1022.8 1025.4 DAY 10 22 12 25 24 6 15 15 21 29 4 11 MIN. QNH PRESSURE IN HPA 1011.0 1008.6 1008.4 1008.1 1011.6 1005.2 1007.6 1007.9 1014.3 1014.2 1015.5 1013.7 1005.2 DAY 23 11 24 18 4 27 19 1 17 6 26 9 MEAN QFF PRESSURE IN HPA 1018.0 1013.9 1011.4 1007.3 1004.3 995.2 992.2 995.9 1004.3 1009.7 1015.9 1016.7 1007.1 MAX. QFF PRESSURE IN HPA 1030.3 1023.8 1024.0 1014.0 1009.2 1002.0 997.0 1003.7 1006.9 1014.6 1021.0 1023.8 1030.3 DAY 10 12 12 8 13 6 16 31 2 25 18 11 MIN. QFF PRESSURE IN HPA 1006.7 1007.6 1003.3 998.2 999.8 987.1 988.4 990.0 1001.4 1004.1 1007.2 1011.3 987.1 DAY 2 25 30 18 26 28 19 1 17 6 15 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 814.0 812.8 813.1 813.8 814.6 811.1 810.0 812.0 815.1 816.5 818.5 815.8 813.9 MAX. QFE PRESSURE IN HPA 820.7 817.6 819.0 818.7 817.6 815.4 812.9 816.0 817.3 820.1 821.5 819.7 821.5 DAY 9 22 12 25 28 6 15 31 1 29 4 11 MIN. QFE PRESSURE IN HPA 809.7 808.8 807.6 807.4 810.6 805.0 807.0 807.9 812.3 812.5 813.6 812.4 805.0 DAY 2 11 24 18 4 27 19 1 17 6 26 19 MEAN QNH PRESSURE IN HPA 1016.0 1014.6 1014.9 1015.7 1016.7 1012.6 1011.3 1013.6 1017.4 1019.0 1021.4 1018.2 1016.0 MAX. QNH PRESSURE IN HPA 1024.0 1020.3 1022.0 1021.6 1020.3 1017.7 1014.7 1018.4 1020.0 1023.3 1025.0 1022.8 1025.0 DAY 9 22 12 25 28 6 15 31 1 29 4 11 MIN. QNH PRESSURE IN HPA 1010.9 1009.8 1008.4 1008.1 1011.9 1005.2 1007.6 1008.7 1014.0 1014.2 1015.5 1014.1 1005.2 DAY 2 11 24 18 4 27 19 1 17 6 26 19 MEAN QFF PRESSURE IN HPA 1016.9 1013.1 1011.1 1007.0 1004.3 995.4 992.1 995.6 1003.5 1009.1 1015.0 1015.7 1006.6 MAX. QFF PRESSURE IN HPA 1028.5 1022.9 1024.5 1013.7 1010.1 1002.5 997.5 1003.7 1007.1 1014.5 1020.6 1023.0 1028.5 DAY 9 16 12 8 11 6 16 31 1 31 18 11 MIN. QFF PRESSURE IN HPA 1005.9 1006.6 1003.1 997.1 999.9 986.5 987.8 989.8 999.6 1003.2 1007.1 1008.6 986.5 DAY 2 25 30 18 26 28 19 2 17 6 15 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.9 5.9 7.5 14.0 20.1 25.2 27.3 26.0 22.0 14.5 10.0 6.3 15.2 MINIMUN AIR TEMPERATURE (C) -2.9 -0.2 0.1 5.0 10.0 14.1 17.9 16.4 10.6 4.3 0.8 -3.3 6.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 1 0 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 13 7 4 0 0 0 0 0 0 0 5 12 41 DAYS WITH FREEZING MIN.<= 0 23 16 18 1 0 0 0 0 0 2 13 26 99 TEMPERATURE RECORDS LOWEST(C) -12.0 -8.6 -7.5 -3.0 2.4 5.6 12.0 12.0 3.4 0.0 -6.8 -11.6 -12.0 DAY 16 8 23 1 8 5 25 5 30 8 30 13 MAXIMUM AIR TEMPERATURE (C) 8.8 11.9 14.3 21.6 28.1 33.5 34.3 33.5 30.7 23.7 19.1 16.3 23.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 11 29 31 31 20 0 0 0 122 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 15.8 17.2 19.6 27.0 33.6 36.8 37.4 36.0 33.4 28.8 24.4 20.6 37.4 DAY 28 28 19 18 27 20 9 20 3 1 1 21 DIF. BETWEEN (MAX.-MIN.) (C) 11.7 12.1 14.2 16.6 18.1 19.4 16.4 17.1 20.1 19.4 18.3 19.6 16.9 MEAN DAILY TEMP. (MDT) (C) 3.0 5.9 7.2 13.3 19.1 23.8 26.1 24.9 20.7 14.0 10.0 6.5 14.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 11.0 87.4 158.3 122.4 20.3 0.0 0.0 0.0 399.4 HEATING DEG. DAYS(BASE 18 0C) 465.4 339.9 334.9 141.4 22.6 0.2 0.0 0.0 3.4 124.8 241.4 356.8 2030.7 DEWPOINT (MEAN C) -3.7 -2.0 -2.7 -0.6 1.5 -2.1 -1.6 2.7 -4.2 -5.0 -5.1 -8.6 -2.6 MIXING RATIO (G/KG) 3.90 4.40 4.21 4.80 5.39 4.24 4.37 5.95 3.65 3.40 3.49 2.61 4.20 VAPOUR PRESSURE (HPA) 5.07 5.72 5.46 6.24 6.99 5.50 5.65 7.70 4.75 4.44 4.56 3.41 5.46 SATURATION DEF. (HPA) 2.92 4.04 5.48 10.78 18.17 28.65 32.11 27.47 23.61 13.53 8.89 7.12 15.23 RELATIVE HUMIDITY (MEAN %) 67 62 55 42 33 19 16 24 19 29 38 39 37 RELATIVE HUMIDITY (MAX. %) 87 83 83 68 57 34 27 35 31 48 62 63 57 RELATIVE HUMIDITY (MIN. %) 43 36 31 21 16 9 10 15 10 15 20 19 20 RELATIVE HUMIDITY (MEAN% 03UTC) 83 81 75 64 53 31 26 34 29 47 60 59 54 RELATIVE HUMIDITY (MEAN% 09UTC) 52 45 38 27 20 11 11 17 13 18 25 24 25 RELATIVE HUMIDITY (MEAN% 15UTC) 57 52 42 28 20 11 11 18 13 22 28 28 28 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.8 92.4 25.1 12.3 2.0 0.0 0.0 0.2 0.0 0.6 0.4 3.8 179.6 DAYS WITH PRECIPITATION >=10 2 2 0 1 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 3 5 2 1 0 0 0 0 0 0 0 0 11 DAYS WITH PRECIPITATION >= 1 7 6 6 2 1 0 0 0 0 0 0 1 23 DAYS WITH PRECIPITATION 8 7 9 3 1 0 0 1 0 1 1 1 32 GREATEST DAILY PRECIPITATION 14.0 43.0 8.0 11.0 2.0 0.0 0.0 0.2 0.0 0.6 0.4 3.8 43.0 DAY 4 4 7 28 7 ** ** 14 ** 25 25 25 DAY WITH THUNDER STORM 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 1 2 5 3 3 2 4 2 0 0 1 0 23 WIND DIRECTION (PREVAILING) 180 180 270 270 270 180 360 360 360 270 225 225 180 PREVAILING WIND SPEED(KNOTS) 8.4 9.9 11.3 11.0 10.1 8.4 12.8 12.7 10.0 8.0 9.7 7.6 8.5 PREVAILING WIND PERCENT 14.1 24.1 13.7 16.3 19.0 13.6 29.4 22.6 20.4 8.5 10.8 6.0 9.8 CALMS PERCENT OF WIND 50.8 37.5 41.5 38.8 46.0 45.8 26.6 27.4 44.2 64.5 65.0 78.2 47.3 NO. OF WIND OBSERVATION 248 224 248 240 248 236 248 248 240 248 240 248 2916 VECTOR WIND DIRECTION (MEAN) 185 195 224 234 239 256 12 22 14 253 231 191 269 VECTOR WIND MAGNITUDE(KNOTS) 1.7 2.9 2.5 2.7 2.7 0.8 4.8 4.3 2.6 0.5 1.7 0.5 0.6 WIND STEADINESES (MEAN %) 37.8 46.8 42.4 46.6 49.1 16.7 60.0 58.1 52.0 17.9 54.8 31.3 11.8 WIND SPEED (MEAN KNOTS) 4.5 6.2 5.9 5.8 5.5 4.8 8.0 7.4 5.0 2.8 3.1 1.6 5.1 FASTEST WIND DIRECTION 220 260 220 270 250 220 360 20 30 360 240 150 220 FASTEST WIND SPEED (KNOTS) 35 31 35 35 31 29 23 27 19 14 23 14 35 DAY 9 15 3 22 4 19 10 24 16 7 29 23 DAYS WITH SKY CLEAR (0-2)/8 12 13 14 13 19 30 30 27 28 27 19 22 254 DAYS WITH P.CLOUDY (3-6)/8 10 5 11 14 11 0 1 4 2 3 9 8 78 DAYS WITH CLOUDY (7-8)/8 9 10 6 3 1 0 0 0 0 1 2 1 33 DAYS WITH VISIBILITY =< 2 KM 1 0 1 0 0 0 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 165.3 175.7 201.7 240.4 316.2 374.5 352.6 313.8 326.0 294.0 222.2 255.1 3237.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.6 814.9 814.1 814.4 814.2 811.6 810.3 812.4 814.2 818.7 817.2 817.6 814.5 MAX. QFE PRESSURE IN HPA 820.7 819.5 820.6 820.3 817.4 817.1 815.1 816.1 818.3 824.2 822.1 824.1 824.2 DAY-HOUR 27- 6 8- 6 31- 6 1- 6 27- 6 23- 6 27- 6 31- 6 30-18 17- 6 24- 6 26- 6 MIN. QFE PRESSURE IN HPA 806.7 808.2 805.3 807.7 807.5 806.8 805.4 806.6 810.5 813.6 812.2 811.3 805.3 DAY-HOUR 14- 9 4-21 12-12 13-12 29-15 25-15 9-15 12-15 3-12 3-12 14-12 4-12 MEAN QNH PRESSURE IN HPA 1016.8 1017.1 1016.1 1016.5 1016.2 1013.1 1011.6 1014.1 1016.3 1021.6 1019.8 1020.4 1016.6 MAX. QNH PRESSURE IN HPA 1024.0 1022.6 1023.9 1023.6 1020.1 1019.7 1017.3 1018.5 1021.2 1028.2 1025.7 1028.1 1028.2 DAY-HOUR 27- 6 8- 6 31- 6 1- 6 27- 6 23- 6 27- 6 31- 6 30-18 17- 6 24- 6 26- 6 MIN. QNH PRESSURE IN HPA 1007.3 1009.1 1005.6 1008.5 1008.2 1007.4 1005.7 1007.2 1011.8 1015.5 1013.9 1012.8 1005.6 DAY-HOUR 14- 9 4-21 12-12 13-12 29-15 25-15 9-15 12-15 3-12 3-12 14-12 4-12 MEAN QFF PRESSURE IN HPA 1016.5 1014.4 1012.2 1007.6 1002.9 996.3 993.4 996.6 1001.8 1012.7 1014.2 1017.8 1007.2 MAX. QFF PRESSURE IN HPA 1024.6 1026.0 1018.8 1018.2 1010.0 1003.4 1001.1 1003.5 1011.3 1020.5 1023.7 1027.0 1027.0 DAY-HOUR 16- 3 8- 3 24- 3 1- 3 2- 6 23- 3 29- 3 26- 3 30-15 17- 3 30-18 26- 6 MIN. QFF PRESSURE IN HPA 1003.5 1006.4 1001.9 1001.2 993.1 990.4 985.9 989.5 994.8 1003.0 1005.4 1007.4 985.9 DAY-HOUR 9- 0 4-21 10-12 13-12 29- 9 25-21 9-15 12-18 3-21 3-12 14- 9 4-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 814.4 814.6 813.7 814.1 813.9 811.4 810.1 812.1 814.0 818.5 817.0 817.4 814.3 MAX. QFE PRESSURE IN HPA 819.7 818.4 817.9 818.0 815.6 815.4 813.7 814.6 816.7 822.6 819.9 822.3 822.6 DAY 27 8 31 17 3 23 28 31 24 17 1 27 MIN. QFE PRESSURE IN HPA 807.6 808.2 808.6 809.2 810.5 807.8 806.4 807.9 811.2 814.6 813.5 812.2 806.4 DAY 14 5 22 13 30 26 14 13 4 4 14 5 MEAN QNH PRESSURE IN HPA 1016.4 1016.7 1015.6 1016.1 1015.9 1012.9 1011.4 1013.8 1016.0 1021.3 1019.7 1020.1 1016.3 MAX. QNH PRESSURE IN HPA 1022.8 1021.3 1020.7 1020.8 1017.9 1017.7 1015.7 1016.7 1019.2 1026.3 1023.1 1025.9 1026.3 DAY 27 8 31 17 3 23 28 31 24 17 1 27 MIN. QNH PRESSURE IN HPA 1008.4 1009.1 1009.5 1010.3 1011.8 1008.6 1006.9 1008.7 1012.7 1016.7 1015.4 1013.9 1006.9 DAY 14 5 22 13 30 26 14 13 4 4 14 5 MEAN QFF PRESSURE IN HPA 1015.8 1013.7 1011.5 1007.3 1002.8 996.6 993.0 996.3 1001.4 1012.1 1013.5 1016.7 1006.7 MAX. QFF PRESSURE IN HPA 1022.9 1024.1 1017.5 1014.8 1008.5 1000.4 998.6 1001.0 1007.0 1017.5 1018.4 1023.7 1024.1 DAY 27 8 24 1 2 23 28 27 19 9 26 27 MIN. QFF PRESSURE IN HPA 1003.5 1007.2 1003.0 1002.7 996.1 992.1 987.0 991.2 996.3 1004.1 1007.2 1009.0 987.0 DAY 9 5 10 13 30 26 9 13 4 4 14 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 814.7 815.2 814.3 814.9 814.7 812.4 811.2 813.2 815.0 819.3 817.7 818.0 815.1 MAX. QFE PRESSURE IN HPA 819.7 818.7 819.1 819.1 816.3 816.7 814.4 815.7 817.2 823.4 820.7 823.0 823.4 DAY 27 8 31 1 27 23 28 31 23 17 1 27 MIN. QFE PRESSURE IN HPA 807.2 810.2 809.3 810.1 811.6 809.2 807.2 809.3 812.9 815.5 814.2 813.0 807.2 DAY 14 5 22 13 29 26 14 13 4 3 14 5 MEAN QNH PRESSURE IN HPA 1016.9 1017.4 1016.4 1017.0 1016.9 1014.1 1012.6 1015.1 1017.2 1022.4 1020.5 1020.8 1017.3 MAX. QNH PRESSURE IN HPA 1022.8 1021.6 1022.1 1022.1 1018.8 1019.2 1016.5 1018.1 1019.8 1027.3 1024.0 1026.8 1027.3 DAY 27 8 31 1 27 23 28 31 23 17 1 27 MIN. QNH PRESSURE IN HPA 1007.9 1011.5 1010.4 1011.3 1013.1 1010.3 1007.9 1010.4 1014.7 1017.8 1016.3 1014.8 1007.9 DAY 14 5 22 13 29 26 14 13 4 3 14 5 MEAN QFF PRESSURE IN HPA 1017.6 1015.6 1013.3 1009.0 1004.2 997.7 995.2 998.6 1004.4 1015.4 1016.6 1020.2 1009.0 MAX. QFF PRESSURE IN HPA 1024.6 1026.0 1018.8 1018.2 1009.5 1003.4 1001.1 1003.5 1010.9 1020.5 1022.0 1026.3 1026.3 DAY 16 8 24 1 2 23 29 26 30 17 21 27 MIN. QFF PRESSURE IN HPA 1004.2 1008.9 1004.4 1004.0 996.9 992.9 988.7 992.7 999.1 1006.4 1010.5 1012.8 988.7 DAY 9 5 10 28 29 13 14 13 14 4 14 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.8 816.2 815.6 815.8 815.6 813.0 811.7 813.9 815.8 820.5 818.8 819.2 816.0 MAX. QFE PRESSURE IN HPA 820.7 819.5 820.6 820.3 817.4 817.1 815.1 816.1 818.2 824.2 822.1 824.1 824.2 DAY 27 8 31 1 27 23 27 31 23 17 24 26 MIN. QFE PRESSURE IN HPA 807.2 811.2 809.3 810.7 811.8 810.1 807.9 809.8 813.8 816.4 814.8 814.4 807.2 DAY 14 5 12 13 29 26 14 12 29 3 14 5 MEAN QNH PRESSURE IN HPA 1018.1 1018.7 1018.0 1018.2 1017.9 1014.9 1013.3 1015.9 1018.2 1023.7 1021.8 1022.2 1018.4 MAX. QNH PRESSURE IN HPA 1024.0 1022.6 1023.9 1023.6 1020.1 1019.7 1017.3 1018.5 1021.0 1028.2 1025.7 1028.1 1028.2 DAY 27 8 31 1 27 23 27 31 23 17 24 26 MIN. QNH PRESSURE IN HPA 1007.9 1012.7 1010.4 1012.1 1013.4 1011.3 1008.7 1011.0 1015.8 1018.9 1017.0 1016.5 1007.9 DAY 14 5 12 13 29 26 14 12 29 3 14 5 MEAN QFF PRESSURE IN HPA 1018.0 1016.0 1013.9 1008.8 1004.4 997.6 994.8 998.1 1003.1 1014.1 1015.6 1019.4 1008.6 MAX. QFF PRESSURE IN HPA 1023.8 1024.8 1018.1 1016.4 1010.0 1003.4 999.5 1001.4 1009.6 1019.6 1023.0 1027.0 1027.0 DAY 19 8 24 1 2 23 28 29 30 9 30 26 MIN. QFF PRESSURE IN HPA 1006.3 1009.9 1005.9 1003.5 997.8 993.1 988.7 991.7 998.7 1006.5 1007.9 1011.0 988.7 DAY 9 5 10 13 29 13 10 13 4 3 14 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 814.8 815.3 814.5 814.9 814.7 812.1 810.8 812.8 814.6 819.0 817.3 817.8 814.9 MAX. QFE PRESSURE IN HPA 819.5 818.5 819.2 819.2 816.4 815.7 814.3 815.0 817.3 822.6 821.1 822.3 822.6 DAY 26 8 31 17 26 23 27 31 30 17 25 26 MIN. QFE PRESSURE IN HPA 806.7 811.2 807.1 809.6 810.3 809.3 807.0 808.5 812.3 814.8 813.2 812.9 806.7 DAY 14 5 12 13 29 3 14 12 3 3 14 4 MEAN QNH PRESSURE IN HPA 1016.9 1017.6 1016.6 1017.1 1016.8 1013.7 1012.2 1014.6 1016.7 1022.0 1020.0 1020.6 1017.1 MAX. QNH PRESSURE IN HPA 1022.6 1021.4 1022.2 1022.2 1018.9 1018.1 1016.4 1017.2 1020.0 1026.3 1024.5 1025.9 1026.3 DAY 26 8 31 17 26 23 27 31 30 17 25 26 MIN. QNH PRESSURE IN HPA 1007.3 1012.7 1007.8 1010.7 1011.6 1010.4 1007.6 1009.4 1014.0 1017.0 1015.1 1014.7 1007.3 DAY 14 5 12 13 29 3 14 12 3 3 14 4 MEAN QFF PRESSURE IN HPA 1016.1 1014.5 1012.2 1007.8 1003.0 996.5 993.4 996.4 1001.1 1012.1 1013.2 1017.3 1007.0 MAX. QFF PRESSURE IN HPA 1022.4 1022.6 1017.1 1015.6 1008.0 1001.3 998.8 999.9 1007.6 1017.4 1021.1 1023.5 1023.5 DAY 26 8 23 1 2 23 27 7 30 9 30 26 MIN. QFF PRESSURE IN HPA 1005.8 1008.5 1004.3 1001.9 993.1 992.1 987.4 991.4 996.0 1004.0 1005.4 1009.5 987.4 DAY 9 15 22 13 29 26 13 12 4 3 14 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.5 813.8 813.1 813.3 813.3 810.8 809.4 811.5 813.0 817.5 815.9 816.3 813.4 MAX. QFE PRESSURE IN HPA 818.9 817.0 817.5 817.0 815.2 814.5 813.0 814.0 816.3 821.4 819.6 821.0 821.4 DAY 6 8 31 17 2 23 27 31 30 17 25 26 MIN. QFE PRESSURE IN HPA 806.7 810.2 805.3 807.7 808.0 808.1 805.6 806.9 810.5 813.6 812.2 811.3 805.3 DAY 14 23 12 13 29 3 14 12 3 3 14 4 MEAN QNH PRESSURE IN HPA 1015.4 1015.8 1014.9 1015.2 1015.1 1012.1 1010.5 1013.0 1014.8 1020.2 1018.3 1018.8 1015.3 MAX. QNH PRESSURE IN HPA 1021.9 1019.6 1020.2 1019.6 1017.5 1016.6 1014.8 1016.0 1018.8 1024.9 1022.7 1024.4 1024.9 DAY 6 8 31 17 2 23 27 31 30 17 25 26 MIN. QNH PRESSURE IN HPA 1007.3 1011.5 1005.6 1008.5 1008.8 1008.9 1006.0 1007.5 1011.8 1015.5 1013.9 1012.8 1005.6 DAY 14 23 12 13 29 3 14 12 3 3 14 4 MEAN QFF PRESSURE IN HPA 1014.7 1012.7 1010.8 1006.4 1002.1 995.9 992.2 995.4 1000.2 1010.9 1012.1 1015.2 1005.7 MAX. QFF PRESSURE IN HPA 1021.6 1020.7 1017.4 1013.6 1007.9 1000.8 997.6 1000.1 1007.9 1015.5 1019.3 1021.9 1021.9 DAY 3 8 18 1 1 23 27 26 30 9 30 26 MIN. QFF PRESSURE IN HPA 1003.6 1006.9 1001.9 1001.2 993.3 992.2 986.1 989.5 995.5 1003.0 1006.0 1008.7 986.1 DAY 9 15 10 13 29 13 9 12 1 3 14 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.2 814.2 813.3 813.3 813.2 810.4 809.1 811.4 813.2 817.8 816.5 817.0 813.6 MAX. QFE PRESSURE IN HPA 819.5 818.4 817.8 817.1 815.5 814.2 813.0 814.2 816.7 821.4 819.8 821.7 821.7 DAY 6 7 31 16 2 23 27 31 30 17 25 26 MIN. QFE PRESSURE IN HPA 808.8 810.0 805.3 808.1 807.5 806.8 805.4 806.6 810.5 813.9 813.4 811.3 805.3 DAY 14 4 12 13 29 25 9 12 3 3 16 4 MEAN QNH PRESSURE IN HPA 1016.2 1016.3 1015.2 1015.2 1015.0 1011.8 1010.2 1012.9 1015.1 1020.6 1019.0 1019.6 1015.6 MAX. QNH PRESSURE IN HPA 1022.6 1021.3 1020.6 1019.7 1017.8 1016.3 1014.8 1016.3 1019.2 1024.9 1023.0 1025.2 1025.2 DAY 6 7 31 16 2 23 27 31 30 17 25 26 MIN. QNH PRESSURE IN HPA 1009.8 1011.2 1005.6 1008.9 1008.2 1007.4 1005.7 1007.2 1011.8 1015.9 1015.3 1012.8 1005.6 DAY 14 4 12 13 29 25 9 12 3 3 16 4 MEAN QFF PRESSURE IN HPA 1016.9 1014.4 1012.1 1007.2 1002.3 995.4 992.8 996.3 1002.3 1013.5 1015.2 1018.8 1007.2 MAX. QFF PRESSURE IN HPA 1022.8 1023.5 1017.1 1014.2 1008.6 1000.8 998.2 1001.4 1011.3 1017.8 1022.9 1024.2 1024.2 DAY 26 7 23 1 2 23 20 26 30 9 30 7 MIN. QFF PRESSURE IN HPA 1006.8 1008.2 1003.4 1002.6 993.2 990.7 985.9 990.6 996.5 1005.4 1010.2 1010.9 985.9 DAY 9 23 12 20 29 25 9 12 14 4 13 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 815.0 815.2 814.2 814.4 814.2 811.3 810.2 812.2 814.3 818.6 817.3 817.8 814.6 MAX. QFE PRESSURE IN HPA 820.1 819.3 818.8 818.0 817.0 814.2 814.2 815.0 818.3 822.0 820.3 822.3 822.3 DAY 6 7 31 17 2 23 27 30 30 16 1 26 MIN. QFE PRESSURE IN HPA 810.1 809.5 807.5 809.2 808.6 807.7 806.0 807.3 811.2 814.4 814.5 812.2 806.0 DAY 13 4 12 13 29 25 13 12 3 3 16 4 MEAN QNH PRESSURE IN HPA 1017.2 1017.4 1016.3 1016.5 1016.2 1012.8 1011.4 1013.9 1016.4 1021.5 1019.9 1020.6 1016.7 MAX. QNH PRESSURE IN HPA 1023.3 1022.4 1021.8 1020.8 1019.6 1016.3 1016.3 1017.2 1021.2 1025.6 1023.6 1025.9 1025.9 DAY 6 7 31 17 2 23 27 30 30 16 1 26 MIN. QNH PRESSURE IN HPA 1011.3 1010.6 1008.2 1010.3 1009.5 1008.5 1006.4 1008.0 1012.7 1016.5 1016.6 1013.9 1006.4 DAY 13 4 12 13 29 25 13 12 3 3 16 4 MEAN QFF PRESSURE IN HPA 1017.0 1014.7 1012.2 1007.1 1002.7 995.5 993.0 996.1 1001.4 1012.0 1013.9 1017.7 1006.9 MAX. QFF PRESSURE IN HPA 1022.8 1025.1 1018.1 1013.0 1008.7 1000.1 999.1 1000.4 1008.8 1017.3 1023.7 1024.7 1025.1 DAY 2 7 23 1 1 23 27 26 30 8 30 26 MIN. QFF PRESSURE IN HPA 1008.2 1007.9 1004.8 1001.6 994.1 991.1 986.1 989.5 995.1 1003.4 1009.0 1008.1 986.1 DAY 8 4 12 12 29 12 9 12 3 3 13 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 814.8 815.0 814.2 814.3 814.1 811.5 810.3 812.3 814.2 818.6 817.2 817.6 814.5 MAX. QFE PRESSURE IN HPA 819.7 819.3 818.8 818.0 816.3 815.2 814.2 815.0 818.3 822.6 820.4 822.3 822.6 DAY 26 7 31 16 2 22 27 30 30 16 24 26 MIN. QFE PRESSURE IN HPA 808.6 808.2 808.7 809.6 809.7 808.0 806.0 807.5 811.2 814.9 814.3 811.8 806.0 DAY 13 4 12 13 29 25 13 12 3 3 6 4 MEAN QNH PRESSURE IN HPA 1017.0 1017.2 1016.3 1016.4 1016.2 1013.0 1011.6 1014.0 1016.2 1021.5 1019.8 1020.3 1016.6 MAX. QNH PRESSURE IN HPA 1022.8 1022.4 1021.8 1020.8 1018.8 1017.5 1016.3 1017.2 1021.2 1026.3 1023.7 1025.9 1026.3 DAY 26 7 31 16 2 22 27 30 30 16 24 26 MIN. QNH PRESSURE IN HPA 1009.5 1009.1 1009.7 1010.7 1010.9 1008.8 1006.4 1008.2 1012.7 1017.1 1016.4 1013.4 1006.4 DAY 13 4 12 13 29 25 13 12 3 3 6 4 MEAN QFF PRESSURE IN HPA 1016.1 1014.1 1011.9 1007.0 1002.2 995.6 992.9 995.9 1000.9 1011.6 1013.3 1017.0 1006.5 MAX. QFF PRESSURE IN HPA 1022.1 1024.9 1017.8 1011.7 1009.0 999.3 999.4 1000.6 1009.7 1016.5 1021.0 1023.8 1024.9 DAY 26 7 23 15 1 4 27 26 30 9 30 25 MIN. QFF PRESSURE IN HPA 1006.3 1006.4 1005.5 1001.3 994.2 990.4 986.2 990.3 994.8 1004.0 1007.8 1007.4 986.2 DAY 8 4 21 12 28 25 13 12 3 4 13 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.7 4.9 9.3 15.6 19.8 26.2 29.4 28.4 20.3 15.2 11.0 3.9 15.6 MINIMUN AIR TEMPERATURE (C) -4.5 -4.6 2.4 7.1 11.0 15.7 19.8 18.6 11.1 7.1 3.3 -2.8 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 9 6 0 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 17 18 0 0 0 0 0 0 0 0 0 14 49 DAYS WITH FREEZING MIN.<= 0 26 23 8 1 0 0 0 0 0 1 7 23 89 TEMPERATURE RECORDS LOWEST(C) -14.6 -13.0 -3.0 -0.6 3.0 10.4 16.5 13.0 3.0 0.0 -3.4 -12.4 -14.6 DAY 12 21 18 6 3 6 1 21 22 14 12 8 MAXIMUM AIR TEMPERATURE (C) 11.8 14.0 16.0 23.0 27.3 34.1 36.8 36.1 27.9 22.6 18.8 11.2 23.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 10 30 31 31 6 0 0 0 108 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 19.4 22.6 28.6 31.6 37.2 39.4 39.4 35.0 29.0 22.4 17.8 39.4 DAY 1 1 31 26 25 26 21 6 1 1 4 3 DIF. BETWEEN (MAX.-MIN.) (C) 16.3 18.6 13.6 15.9 16.3 18.4 17.0 17.5 16.8 15.5 15.5 14.0 16.3 MEAN DAILY TEMP. (MDT) (C) 3.7 4.7 9.2 15.1 19.2 24.9 28.3 27.3 19.5 14.8 11.0 4.2 15.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 15.6 116.7 225.3 195.6 29.3 0.0 0.0 0.0 582.7 HEATING DEG. DAYS(BASE 18 0C) 444.4 373.2 272.4 95.6 26.1 0.0 0.0 0.0 28.1 102.6 208.8 428.8 1979.9 DEWPOINT (MEAN C) -8.3 -10.8 -1.9 -1.3 1.2 0.9 5.8 5.7 0.4 1.3 -2.2 -6.5 -1.3 MIXING RATIO (G/KG) 2.71 2.26 4.37 4.54 5.41 5.18 7.56 7.65 5.16 5.44 4.24 3.24 4.81 VAPOUR PRESSURE (HPA) 3.53 2.94 5.67 5.89 7.01 6.68 9.69 9.82 6.70 7.09 5.54 4.23 6.23 SATURATION DEF. (HPA) 5.15 6.59 6.64 13.01 17.60 29.20 32.91 30.78 18.63 11.04 8.41 4.54 15.38 RELATIVE HUMIDITY (MEAN %) 46 36 53 36 34 21 25 26 29 43 45 53 37 RELATIVE HUMIDITY (MAX. %) 70 62 79 59 56 32 41 41 44 69 72 78 59 RELATIVE HUMIDITY (MIN. %) 25 16 28 18 18 12 14 15 17 24 23 27 20 RELATIVE HUMIDITY (MEAN% 03UTC) 63 56 75 56 54 31 39 39 43 67 68 71 55 RELATIVE HUMIDITY (MEAN% 09UTC) 35 24 36 23 22 14 17 19 19 30 29 36 25 RELATIVE HUMIDITY (MEAN% 15UTC) 35 22 38 26 24 15 16 18 24 32 34 45 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 14.0 0.0 101.6 3.6 37.0 0.0 1.0 3.0 3.0 8.5 4.0 24.8 200.5 DAYS WITH PRECIPITATION >=10 0 0 6 0 1 0 0 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 5 1 0 8 0 2 0 0 0 0 1 0 1 13 DAYS WITH PRECIPITATION >= 1 3 0 8 2 2 0 1 1 2 2 1 5 27 DAYS WITH PRECIPITATION 3 0 8 3 2 0 1 1 2 3 4 6 33 GREATEST DAILY PRECIPITATION 9.0 0.0 25.0 2.4 32.0 0.0 1.0 3.0 2.0 7.0 2.4 17.0 32.0 DAY 24 ** 1 2 6 ** 3 13 8 8 17 4 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 0 0 3 0 0 4 DAYS WITH SNOW OR SLEET 3 0 0 0 0 0 0 0 0 0 0 1 4 DAYS WITH DUST 0 9 1 5 4 2 1 0 0 1 0 0 23 WIND DIRECTION (PREVAILING) 225 225 225 225 225 225 360 45 360 360 180 225 225 PREVAILING WIND SPEED(KNOTS) 8.6 15.9 10.9 10.2 10.7 8.7 11.0 9.1 10.8 11.0 8.7 9.1 10.3 PREVAILING WIND PERCENT 7.7 15.6 13.7 10.8 19.8 9.6 16.5 11.3 23.8 8.5 10.8 12.5 9.9 CALMS PERCENT OF WIND 75.8 55.8 56.5 52.5 61.3 62.1 52.4 49.2 42.9 61.7 59.6 62.5 57.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 216 257 191 292 240 278 18 39 9 356 197 210 276 VECTOR WIND MAGNITUDE(KNOTS) 0.9 2.6 2.1 1.8 2.9 1.5 2.3 1.2 3.1 1.3 1.7 1.1 0.7 WIND STEADINESES (MEAN %) 40.9 44.8 51.2 36.7 74.4 40.5 51.1 26.7 55.4 34.2 48.6 34.4 17.1 WIND SPEED (MEAN KNOTS) 2.2 5.8 4.1 4.9 3.9 3.7 4.5 4.5 5.6 3.8 3.5 3.2 4.1 FASTEST WIND DIRECTION 270 240 240 270 240 270 360 130 20 300 270 250 240 FASTEST WIND SPEED (KNOTS) 27 39 31 35 35 23 16 19 27 19 23 19 39 DAY 17 3 14 1 1 4 3 13 22 2 26 2 DAYS WITH SKY CLEAR (0-2)/8 20 20 15 15 19 30 26 30 22 18 15 20 250 DAYS WITH P.CLOUDY (3-6)/8 8 7 7 13 10 0 5 1 8 13 12 8 92 DAYS WITH CLOUDY (7-8)/8 3 1 9 2 2 0 0 0 0 0 3 3 23 DAYS WITH VISIBILITY =< 2 KM 0 3 0 0 0 0 0 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 235.0 254.9 227.4 275.1 306.7 366.1 341.8 335.8 279.5 278.5 213.0 224.6 3338.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.2 812.5 814.3 814.7 814.2 809.6 807.9 810.1 815.8 818.3 817.9 816.9 813.9 MAX. QFE PRESSURE IN HPA 821.9 817.6 819.0 820.5 819.7 814.1 811.0 814.2 822.5 823.2 823.5 821.0 823.5 DAY-HOUR 28- 6 21- 6 31- 6 15- 6 15- 6 9- 6 3- 3 15- 6 24- 6 10- 6 2- 6 19- 6 MIN. QFE PRESSURE IN HPA 807.6 806.6 807.8 807.7 810.5 804.7 804.5 804.9 808.5 814.4 811.7 808.0 804.5 DAY-HOUR 25-12 12-12 12-12 3-12 1-12 30-15 8-15 2-12 1-12 16-12 26- 0 4- 3 MEAN QNH PRESSURE IN HPA 1017.5 1014.2 1016.4 1016.9 1016.3 1010.7 1008.7 1011.3 1018.2 1021.2 1020.6 1019.5 1015.9 MAX. QNH PRESSURE IN HPA 1025.5 1020.3 1022.0 1023.8 1022.8 1016.1 1012.4 1016.3 1026.2 1027.0 1027.4 1024.4 1027.4 DAY-HOUR 28- 6 21- 6 31- 6 15- 6 15- 6 9- 6 3- 3 15- 6 24- 6 10- 6 2- 6 19- 6 MIN. QNH PRESSURE IN HPA 1008.4 1007.2 1008.6 1008.5 1011.8 1004.9 1004.6 1005.1 1009.4 1016.5 1013.3 1008.8 1004.6 DAY-HOUR 25-12 12-12 12-12 3-12 1-12 30-15 8-15 2-12 1-12 16-12 26- 0 4- 3 MEAN QFF PRESSURE IN HPA 1016.8 1012.4 1011.1 1006.9 1003.2 993.1 988.7 991.9 1004.7 1011.5 1014.2 1018.6 1006.1 MAX. QFF PRESSURE IN HPA 1028.3 1025.6 1019.0 1018.8 1011.0 999.8 994.6 998.7 1018.3 1020.0 1021.7 1030.8 1030.8 DAY-HOUR 28- 6 21- 3 18- 3 6- 3 6- 9 1- 3 14- 3 22- 3 23- 3 11- 3 21- 3 8- 3 MIN. QFF PRESSURE IN HPA 1006.2 1000.3 1001.4 998.9 996.4 986.9 983.7 983.3 991.0 1003.1 1004.4 999.5 983.3 DAY-HOUR 6- 0 12-12 12-12 3-12 24-12 30-15 21-18 4-12 1-12 1-12 26- 0 4- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 814.8 812.0 813.8 814.5 813.9 809.7 808.4 810.4 815.5 818.0 817.7 816.5 813.8 MAX. QFE PRESSURE IN HPA 819.5 815.6 817.2 818.4 818.4 813.0 810.8 813.0 820.7 821.1 821.2 819.7 821.2 DAY 19 21 31 6 15 1 14 15 24 10 2 21 MIN. QFE PRESSURE IN HPA 808.8 807.8 809.6 808.4 810.8 805.8 806.3 807.0 810.0 814.8 811.7 808.3 805.8 DAY 26 12 13 4 2 29 21 1 1 4 26 4 MEAN QNH PRESSURE IN HPA 1017.0 1013.6 1015.8 1016.6 1015.9 1010.8 1009.3 1011.7 1017.9 1020.8 1020.5 1019.1 1015.7 MAX. QNH PRESSURE IN HPA 1022.6 1017.9 1019.8 1021.3 1021.3 1014.8 1012.2 1014.8 1024.0 1024.5 1024.6 1022.8 1024.6 DAY 19 21 31 6 15 1 14 15 24 10 2 21 MIN. QNH PRESSURE IN HPA 1009.8 1008.6 1010.7 1009.3 1012.2 1006.2 1006.8 1007.6 1011.2 1017.0 1013.3 1009.2 1006.2 DAY 26 12 13 4 2 29 21 1 1 4 26 4 MEAN QFF PRESSURE IN HPA 1015.7 1011.2 1010.3 1006.7 1002.9 993.5 989.5 992.4 1004.2 1010.9 1013.5 1017.4 1005.7 MAX. QFF PRESSURE IN HPA 1023.7 1022.2 1016.8 1016.8 1009.2 998.3 993.6 997.2 1014.2 1016.7 1018.3 1027.5 1027.5 DAY 28 21 18 6 7 12 14 22 24 11 21 8 MIN. QFF PRESSURE IN HPA 1006.2 1001.3 1003.6 1001.3 997.1 989.0 986.2 986.1 992.9 1005.4 1004.4 999.5 986.1 DAY 6 12 13 4 24 28 21 4 1 3 26 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.7 812.8 814.7 815.5 814.7 810.4 808.8 811.0 816.4 818.9 818.4 817.1 814.5 MAX. QFE PRESSURE IN HPA 820.3 816.4 818.3 819.4 819.1 813.7 811.0 813.8 821.9 822.8 821.8 819.6 822.8 DAY 19 26 19 15 15 1 3 15 23 10 1 19 MIN. QFE PRESSURE IN HPA 809.4 807.8 810.0 810.3 811.8 806.4 806.6 807.3 810.4 816.0 812.0 808.0 806.4 DAY 25 12 12 3 2 29 21 1 1 3 26 4 MEAN QNH PRESSURE IN HPA 1018.1 1014.6 1016.9 1017.8 1016.9 1011.7 1009.7 1012.4 1018.9 1021.9 1021.3 1019.8 1016.7 MAX. QNH PRESSURE IN HPA 1023.6 1018.9 1021.2 1022.5 1022.1 1015.7 1012.4 1015.8 1025.5 1026.5 1025.4 1022.7 1026.5 DAY 19 26 19 15 15 1 3 15 23 10 1 19 MIN. QNH PRESSURE IN HPA 1010.5 1008.6 1011.2 1011.6 1013.4 1006.9 1007.2 1008.0 1011.7 1018.4 1013.6 1008.8 1006.9 DAY 25 12 12 3 2 29 21 1 1 3 26 4 MEAN QFF PRESSURE IN HPA 1018.8 1014.3 1012.5 1008.6 1004.1 994.5 990.2 994.0 1007.1 1013.7 1016.4 1020.4 1007.9 MAX. QFF PRESSURE IN HPA 1027.5 1025.6 1019.0 1018.8 1010.0 999.8 994.6 998.7 1018.3 1020.0 1021.7 1030.8 1030.8 DAY 28 21 18 6 15 1 14 22 23 11 21 8 MIN. QFF PRESSURE IN HPA 1009.2 1002.7 1006.2 1003.0 998.6 989.5 986.7 987.8 994.9 1007.3 1006.5 1001.1 986.7 DAY 6 12 12 3 24 29 22 2 1 2 26 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 817.0 814.1 815.8 816.3 815.6 810.9 809.0 811.4 817.3 819.9 819.4 818.3 815.4 MAX. QFE PRESSURE IN HPA 821.9 817.6 819.0 820.5 819.7 814.1 811.0 814.2 822.5 823.2 823.5 821.0 823.5 DAY 28 21 31 15 15 9 3 15 24 10 2 19 MIN. QFE PRESSURE IN HPA 810.5 808.8 811.1 810.8 812.0 806.8 807.0 807.5 811.4 816.6 814.0 809.5 806.8 DAY 25 12 12 3 11 29 21 1 1 3 26 4 MEAN QNH PRESSURE IN HPA 1019.6 1016.2 1018.2 1018.8 1017.9 1012.2 1010.0 1012.9 1019.9 1023.0 1022.5 1021.2 1017.7 MAX. QNH PRESSURE IN HPA 1025.5 1020.3 1022.0 1023.8 1022.8 1016.1 1012.4 1016.3 1026.2 1027.0 1027.4 1024.4 1027.4 DAY 28 21 31 15 15 9 3 15 24 10 2 19 MIN. QNH PRESSURE IN HPA 1011.8 1009.8 1012.5 1012.2 1013.6 1007.4 1007.6 1008.2 1012.9 1019.1 1016.0 1010.6 1007.4 DAY 25 12 12 3 11 29 21 1 1 3 26 4 MEAN QFF PRESSURE IN HPA 1019.0 1014.3 1012.8 1008.4 1004.5 994.3 989.7 993.0 1006.1 1012.9 1015.7 1020.5 1007.6 MAX. QFF PRESSURE IN HPA 1028.3 1023.6 1018.0 1016.2 1009.7 999.1 993.1 997.4 1015.6 1019.2 1020.4 1030.6 1030.6 DAY 28 21 1 6 7 9 14 22 23 10 21 8 MIN. QFF PRESSURE IN HPA 1011.2 1004.3 1006.9 1003.3 998.6 989.9 985.5 986.9 993.7 1005.5 1009.0 1004.9 985.5 DAY 16 12 12 3 24 27 22 1 1 3 26 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.7 812.9 814.8 815.2 814.6 809.8 807.9 810.0 816.0 818.5 817.9 817.1 814.2 MAX. QFE PRESSURE IN HPA 821.4 816.3 817.8 819.5 818.5 813.2 810.0 812.5 821.4 822.2 822.1 820.9 822.2 DAY 28 26 18 15 15 9 13 22 23 10 2 19 MIN. QFE PRESSURE IN HPA 809.2 808.0 809.5 809.6 811.4 806.0 805.7 806.4 810.4 815.5 812.6 809.0 805.7 DAY 25 12 12 3 11 29 21 1 1 3 26 4 MEAN QNH PRESSURE IN HPA 1018.0 1014.6 1017.0 1017.4 1016.8 1011.0 1008.7 1011.3 1018.4 1021.4 1020.6 1019.7 1016.2 MAX. QNH PRESSURE IN HPA 1024.9 1018.8 1020.6 1022.6 1021.4 1015.1 1011.2 1014.2 1024.9 1025.8 1025.7 1024.3 1025.8 DAY 28 26 18 15 15 9 13 22 23 10 2 19 MIN. QNH PRESSURE IN HPA 1010.3 1008.8 1010.6 1010.7 1012.9 1006.4 1006.1 1006.9 1011.7 1017.8 1014.3 1010.0 1006.1 DAY 25 12 12 3 11 29 21 1 1 3 26 4 MEAN QFF PRESSURE IN HPA 1016.7 1012.2 1011.3 1006.9 1003.5 993.0 988.2 991.0 1003.9 1010.7 1013.4 1018.1 1005.7 MAX. QFF PRESSURE IN HPA 1026.2 1021.8 1016.0 1015.9 1011.0 997.2 991.3 996.6 1013.5 1017.2 1018.2 1027.7 1027.7 DAY 28 21 1 5 6 12 13 22 23 11 21 8 MIN. QFF PRESSURE IN HPA 1008.4 1002.0 1004.0 1001.4 997.7 988.7 983.8 985.1 991.9 1004.7 1006.5 1005.0 983.8 DAY 16 12 12 3 24 28 21 3 1 2 26 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 814.1 811.1 813.3 813.6 813.4 808.5 806.6 808.6 814.5 817.1 816.6 815.8 812.8 MAX. QFE PRESSURE IN HPA 820.0 814.4 816.0 818.4 817.1 812.0 809.5 810.7 820.2 820.7 820.2 819.6 820.7 DAY 28 26 18 5 15 9 13 16 23 10 1 19 MIN. QFE PRESSURE IN HPA 807.6 806.6 807.8 807.7 810.5 804.8 804.6 804.9 808.5 814.4 811.8 808.1 804.6 DAY 25 12 12 3 1 29 21 2 1 16 26 4 MEAN QNH PRESSURE IN HPA 1016.1 1012.5 1015.2 1015.6 1015.3 1009.5 1007.2 1009.5 1016.6 1019.7 1019.1 1018.1 1014.5 MAX. QNH PRESSURE IN HPA 1023.2 1016.5 1018.4 1021.3 1019.7 1013.6 1010.6 1012.1 1023.4 1024.0 1023.4 1022.7 1024.0 DAY 28 26 18 5 15 9 13 16 23 10 1 19 MIN. QNH PRESSURE IN HPA 1008.4 1007.2 1008.6 1008.5 1011.8 1005.0 1004.8 1005.1 1009.4 1016.5 1013.4 1008.9 1004.8 DAY 25 12 12 3 1 29 21 2 1 16 26 4 MEAN QFF PRESSURE IN HPA 1014.8 1010.2 1009.7 1005.7 1002.3 992.0 987.4 990.2 1003.0 1009.8 1012.2 1016.5 1004.5 MAX. QFF PRESSURE IN HPA 1024.3 1017.6 1014.6 1015.4 1010.0 996.7 990.8 995.3 1013.3 1016.3 1016.9 1025.7 1025.7 DAY 28 20 18 5 6 12 16 22 23 11 20 8 MIN. QFF PRESSURE IN HPA 1007.2 1000.3 1001.4 998.9 996.4 987.8 983.7 983.3 991.0 1003.1 1006.0 1003.6 983.3 DAY 5 12 12 3 24 28 21 4 1 1 26 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.5 811.7 813.5 813.6 813.4 808.4 806.5 808.7 814.9 817.4 817.2 816.4 813.0 MAX. QFE PRESSURE IN HPA 819.6 815.5 816.2 818.8 817.1 812.0 809.5 811.0 820.5 821.0 820.2 819.6 821.0 DAY 28 7 18 5 15 9 13 15 23 10 1 19 MIN. QFE PRESSURE IN HPA 807.8 807.4 808.4 807.9 810.5 804.7 804.5 805.2 808.5 814.7 813.3 808.1 804.5 DAY 25 12 12 3 1 30 8 1 1 16 25 4 MEAN QNH PRESSURE IN HPA 1016.7 1013.3 1015.4 1015.6 1015.2 1009.3 1007.1 1009.6 1017.1 1020.1 1019.8 1018.9 1014.8 MAX. QNH PRESSURE IN HPA 1022.7 1017.8 1018.6 1021.8 1019.7 1013.6 1010.6 1012.4 1023.8 1024.4 1023.4 1022.7 1024.4 DAY 28 7 18 5 15 9 13 15 23 10 1 19 MIN. QNH PRESSURE IN HPA 1008.6 1008.1 1009.3 1008.7 1011.8 1004.9 1004.6 1005.5 1009.4 1016.9 1015.2 1008.9 1004.6 DAY 25 12 12 3 1 30 8 1 1 16 25 4 MEAN QFF PRESSURE IN HPA 1017.2 1012.9 1010.9 1006.3 1002.6 992.0 987.6 991.3 1005.2 1012.0 1015.0 1019.5 1006.1 MAX. QFF PRESSURE IN HPA 1026.3 1020.9 1016.2 1017.6 1008.6 996.9 991.3 996.8 1016.4 1018.5 1020.4 1029.0 1029.0 DAY 28 20 18 5 14 9 13 24 22 11 20 8 MIN. QFF PRESSURE IN HPA 1009.2 1002.6 1002.6 1000.3 996.6 986.9 984.1 985.1 993.2 1004.9 1010.0 1003.7 984.1 DAY 25 12 12 3 24 30 21 3 1 1 26 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 815.1 812.7 814.4 814.7 814.3 809.4 807.8 810.1 815.9 818.4 817.9 817.1 814.0 MAX. QFE PRESSURE IN HPA 819.6 816.8 817.3 819.7 818.0 812.7 810.9 812.1 821.5 821.5 821.0 820.4 821.5 DAY 28 20 18 5 14 8 13 23 23 9 1 19 MIN. QFE PRESSURE IN HPA 808.2 809.0 808.4 808.8 811.4 806.0 805.8 806.6 809.8 815.2 812.3 808.3 805.8 DAY 25 12 12 3 1 27 21 1 1 3 25 4 MEAN QNH PRESSURE IN HPA 1017.3 1014.4 1016.5 1016.9 1016.3 1010.5 1008.6 1011.3 1018.3 1021.2 1020.7 1019.8 1016.0 MAX. QNH PRESSURE IN HPA 1022.7 1019.4 1020.0 1022.8 1020.8 1014.5 1012.3 1013.7 1025.0 1025.0 1024.4 1023.7 1025.0 DAY 28 20 18 5 14 8 13 23 23 9 1 19 MIN. QNH PRESSURE IN HPA 1009.1 1010.0 1009.3 1009.8 1012.9 1006.4 1006.2 1007.2 1011.0 1017.5 1014.0 1009.2 1006.2 DAY 25 12 12 3 1 27 21 1 1 3 25 4 MEAN QFF PRESSURE IN HPA 1016.6 1012.6 1011.0 1006.5 1002.9 992.6 988.4 991.7 1004.6 1011.2 1013.9 1019.1 1005.9 MAX. QFF PRESSURE IN HPA 1025.0 1023.1 1016.2 1016.4 1008.6 997.9 993.1 996.0 1014.0 1017.5 1019.3 1028.7 1028.7 DAY 28 20 3 5 8 9 13 24 23 9 20 8 MIN. QFF PRESSURE IN HPA 1008.6 1005.3 1002.2 1001.9 997.4 988.0 983.7 986.5 992.0 1004.3 1006.6 1004.3 983.7 DAY 16 12 12 30 23 25 21 3 4 1 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 814.9 812.5 814.4 814.6 814.2 809.5 808.3 810.4 815.9 818.4 817.9 816.9 814.0 MAX. QFE PRESSURE IN HPA 819.1 816.3 817.3 819.7 818.4 812.6 810.6 812.4 821.1 821.5 821.0 820.1 821.5 DAY 28 7 18 5 14 9 13 14 23 9 1 19 MIN. QFE PRESSURE IN HPA 808.8 809.1 809.0 808.8 810.8 805.8 806.1 807.0 810.8 815.2 812.3 808.3 805.8 DAY 25 11 12 3 1 28 20 1 1 3 25 4 MEAN QNH PRESSURE IN HPA 1017.1 1014.2 1016.5 1016.7 1016.3 1010.6 1009.2 1011.7 1018.3 1021.2 1020.6 1019.5 1016.0 MAX. QNH PRESSURE IN HPA 1022.1 1018.8 1020.0 1022.8 1021.3 1014.3 1011.9 1014.1 1024.5 1025.0 1024.4 1023.3 1025.0 DAY 28 7 18 5 14 9 13 14 23 9 1 19 MIN. QNH PRESSURE IN HPA 1009.8 1010.2 1010.0 1009.8 1012.2 1006.2 1006.6 1007.6 1012.2 1017.5 1014.0 1009.2 1006.2 DAY 25 11 12 3 1 28 20 1 1 3 25 4 MEAN QFF PRESSURE IN HPA 1015.7 1011.8 1010.7 1006.1 1002.9 992.7 988.6 991.6 1003.9 1010.7 1013.4 1017.9 1005.5 MAX. QFF PRESSURE IN HPA 1023.9 1022.3 1016.0 1016.8 1009.4 996.9 992.8 996.7 1012.9 1017.0 1018.1 1027.1 1027.1 DAY 18 20 2 5 6 9 13 21 22 10 19 7 MIN. QFF PRESSURE IN HPA 1006.8 1003.2 1002.4 1000.5 996.9 987.8 984.7 986.4 992.9 1004.6 1005.7 1002.9 984.7 DAY 5 11 12 30 23 27 20 3 1 2 25 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.9 5.5 8.7 13.4 18.7 24.9 28.9 26.7 21.9 15.1 9.1 3.6 15.1 MINIMUN AIR TEMPERATURE (C) -2.8 -1.6 1.6 6.0 9.6 14.2 18.0 16.2 12.1 5.6 -0.9 -2.0 6.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 0 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 14 11 3 0 0 0 0 0 0 0 10 10 48 DAYS WITH FREEZING MIN.<= 0 25 20 13 1 0 0 0 0 0 4 17 25 105 TEMPERATURE RECORDS LOWEST(C) -8.0 -9.6 -5.6 -1.0 3.4 10.4 11.0 9.6 6.0 -2.6 -11.0 -6.4 -11.0 DAY 10 26 1 1 11 1 27 9 23 28 28 31 MAXIMUM AIR TEMPERATURE (C) 12.6 12.1 15.5 20.5 26.5 32.5 36.7 34.6 30.5 24.3 19.5 9.6 22.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 24 31 31 15 0 0 0 101 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.4 16.4 21.0 25.4 29.5 36.0 39.0 36.4 33.2 28.8 24.0 14.8 39.0 DAY 17 22 25 19 7 13 14 24 12 2 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 15.4 13.7 13.9 14.5 16.9 18.3 18.7 18.4 18.4 18.7 20.4 11.6 16.6 MEAN DAILY TEMP. (MDT) (C) 4.9 5.3 8.5 13.3 18.0 23.3 27.3 25.4 21.3 14.9 9.3 3.8 14.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 78.7 195.6 136.1 28.2 0.0 0.0 0.0 438.7 HEATING DEG. DAYS(BASE 18 0C) 405.7 356.3 292.9 142.2 19.9 0.9 0.0 0.0 0.8 102.1 261.3 440.8 2023.0 DEWPOINT (MEAN C) -5.4 -4.6 -3.6 0.4 1.3 4.0 3.8 -1.9 -1.6 -2.9 -9.1 -1.5 -1.8 MIXING RATIO (G/KG) 3.31 3.74 4.08 5.13 5.46 6.45 6.52 4.29 4.34 3.99 2.53 4.37 4.52 VAPOUR PRESSURE (HPA) 4.32 4.86 5.29 6.66 7.09 8.33 8.37 5.56 5.64 5.21 3.31 5.69 5.86 SATURATION DEF. (HPA) 4.90 4.68 6.61 9.49 15.64 25.12 33.49 31.33 22.51 13.59 9.74 2.54 14.97 RELATIVE HUMIDITY (MEAN %) 53 54 49 48 36 29 23 17 23 33 30 73 39 RELATIVE HUMIDITY (MAX. %) 80 79 75 74 58 45 37 30 38 53 52 91 59 RELATIVE HUMIDITY (MIN. %) 28 33 27 24 18 17 13 8 13 18 14 47 22 RELATIVE HUMIDITY (MEAN% 03UTC) 76 74 72 70 54 43 35 27 37 50 50 87 56 RELATIVE HUMIDITY (MEAN% 09UTC) 36 40 33 32 21 19 15 11 14 21 17 58 26 RELATIVE HUMIDITY (MEAN% 15UTC) 40 42 35 35 25 20 15 11 15 25 22 66 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 15.5 65.4 51.0 46.2 6.5 2.2 0.0 0.0 0.0 4.7 0.0 72.4 263.9 DAYS WITH PRECIPITATION >=10 0 2 3 2 0 0 0 0 0 0 0 4 11 DAYS WITH PRECIPITATION >= 5 2 3 3 2 0 0 0 0 0 0 0 6 16 DAYS WITH PRECIPITATION >= 1 4 5 6 5 2 1 0 0 0 2 0 7 32 DAYS WITH PRECIPITATION 5 6 6 7 4 2 0 0 0 3 0 7 40 GREATEST DAILY PRECIPITATION 6.0 42.0 19.0 20.0 4.0 2.0 0.0 0.0 0.0 3.2 0.0 18.0 42.0 DAY 13 6 14 23 25 1 ** ** ** 22 ** 6 DAY WITH THUNDER STORM 0 0 0 5 1 1 0 0 1 0 0 0 8 DAYS WITH SNOW OR SLEET 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 0 2 0 2 2 0 2 0 0 0 1 9 WIND DIRECTION (PREVAILING) 225 270 270 270 360 180 360 360 45 45 45 225 45 PREVAILING WIND SPEED(KNOTS) 9.3 9.5 11.1 9.4 11.0 7.8 11.9 11.3 7.8 8.1 7.3 7.8 8.3 PREVAILING WIND PERCENT 9.7 9.8 12.9 12.9 14.1 9.9 18.1 26.2 15.0 10.1 10.4 7.3 9.4 CALMS PERCENT OF WIND 64.9 57.6 44.8 53.8 48.4 57.7 44.4 36.7 47.1 61.7 62.9 69.0 54.0 NO. OF WIND OBSERVATION 248 224 248 240 248 222 248 248 240 248 240 248 2902 VECTOR WIND DIRECTION (MEAN) 230 252 241 248 318 235 12 17 28 11 212 177 335 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.9 1.3 1.3 2.0 0.7 2.5 4.6 1.6 0.1 0.2 0.9 0.6 WIND STEADINESES (MEAN %) 20.7 25.7 27.1 34.2 40.8 18.9 47.2 70.8 32.7 3.2 7.4 40.9 15.0 WIND SPEED (MEAN KNOTS) 2.9 3.5 4.8 3.8 4.9 3.7 5.3 6.5 4.9 3.1 2.7 2.2 4.0 FASTEST WIND DIRECTION 270 240 270 210 320 20 360 20 360 270 30 200 20 FASTEST WIND SPEED (KNOTS) 19 16 27 19 27 35 23 31 23 16 19 19 35 DAY 1 9 17 12 21 18 26 14 2 13 15 5 DAYS WITH SKY CLEAR (0-2)/8 21 15 15 10 23 27 29 31 29 29 28 15 272 DAYS WITH P.CLOUDY (3-6)/8 6 7 9 13 8 3 2 0 1 1 2 7 59 DAYS WITH CLOUDY (7-8)/8 4 6 7 7 0 0 0 0 0 1 0 9 34 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 7 8 DURATION OF SUNSHINE HOURS 239.8 204.4 237.5 183.2 ****** ****** ****** 372.3 312.9 315.3 297.3 158.6 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.7 813.9 813.7 814.1 814.9 811.2 807.7 811.2 814.3 817.1 817.1 816.4 814.0 MAX. QFE PRESSURE IN HPA 821.9 818.9 819.8 820.5 820.0 816.9 812.3 815.3 820.0 823.2 822.3 820.2 823.2 DAY-HOUR 7- 6 1- 6 3- 6 4- 6 26-18 2- 6 4- 6 25- 6 13- 6 27- 6 15- 6 19- 6 MIN. QFE PRESSURE IN HPA 812.1 808.6 808.4 808.6 809.4 806.8 803.1 806.8 810.2 812.4 810.8 810.6 803.1 DAY-HOUR 1-12 24- 0 27-12 25- 0 15-12 17-15 16-15 3-12 4-15 15-12 26-12 25-12 MEAN QNH PRESSURE IN HPA 1019.3 1015.9 1015.7 1016.1 1017.1 1012.6 1008.4 1012.7 1016.4 1019.8 1019.7 1018.8 1016.0 MAX. QNH PRESSURE IN HPA 1025.5 1021.9 1023.0 1023.8 1023.2 1019.5 1014.0 1017.6 1023.2 1027.0 1025.9 1023.4 1027.0 DAY-HOUR 7- 6 1- 6 3- 6 4- 6 26-18 2- 6 4- 6 25- 6 13- 6 27- 6 15- 6 19- 6 MIN. QNH PRESSURE IN HPA 1013.7 1009.5 1009.3 1009.5 1010.5 1007.4 1003.0 1007.4 1011.5 1014.1 1012.2 1011.9 1003.0 DAY-HOUR 1-12 24- 0 27-12 25- 0 15-12 17-15 16-15 3-12 4-15 15-12 26-12 25-12 MEAN QFF PRESSURE IN HPA 1017.6 1013.5 1010.8 1007.7 1004.7 996.2 988.9 994.9 1001.9 1010.3 1014.9 1018.0 1006.6 MAX. QFF PRESSURE IN HPA 1026.4 1021.1 1020.3 1015.1 1012.8 1008.7 996.6 1000.1 1007.9 1021.6 1025.9 1026.4 1026.4 DAY-HOUR 7-15 12- 6 3- 6 4- 6 27- 3 1- 6 27- 3 19- 3 23- 3 28- 3 28- 3 31- 6 MIN. QFF PRESSURE IN HPA 1009.5 1004.0 1002.2 1001.1 998.7 989.0 982.2 988.5 995.6 1003.5 1006.0 1007.6 982.2 DAY-HOUR 1- 9 23-21 26-21 17-12 14-21 18- 0 16-21 8-12 1- 0 12-12 26- 0 25-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 816.4 813.7 813.4 813.6 814.5 811.1 807.6 811.1 814.2 816.9 816.9 816.1 813.8 MAX. QFE PRESSURE IN HPA 819.5 817.8 817.7 817.3 818.8 815.5 810.8 813.6 818.0 821.3 820.1 818.3 821.3 DAY 7 1 3 4 27 2 4 19 13 27 15 31 MIN. QFE PRESSURE IN HPA 812.8 808.6 809.2 808.6 809.8 807.2 804.1 808.4 811.0 812.8 811.0 813.1 804.1 DAY 26 24 14 25 15 18 17 8 5 15 26 6 MEAN QNH PRESSURE IN HPA 1018.9 1015.7 1015.3 1015.6 1016.6 1012.5 1008.4 1012.6 1016.2 1019.4 1019.4 1018.6 1015.8 MAX. QNH PRESSURE IN HPA 1022.6 1020.6 1020.4 1020.0 1021.8 1017.8 1012.2 1015.5 1020.8 1024.8 1023.3 1021.2 1024.8 DAY 7 1 3 4 27 2 4 19 13 27 15 31 MIN. QNH PRESSURE IN HPA 1014.6 1009.5 1010.3 1009.5 1011.0 1007.9 1004.2 1009.3 1012.4 1014.6 1012.4 1014.9 1004.2 DAY 26 24 14 25 15 18 17 8 5 15 26 6 MEAN QFF PRESSURE IN HPA 1016.7 1012.8 1010.1 1006.9 1004.4 996.4 989.2 994.9 1001.5 1009.6 1013.7 1017.0 1006.1 MAX. QFF PRESSURE IN HPA 1022.2 1017.2 1017.9 1011.8 1011.2 1006.0 994.8 998.7 1005.6 1018.4 1021.9 1022.8 1022.8 DAY 8 11 3 1 27 2 4 19 23 28 28 31 MIN. QFF PRESSURE IN HPA 1012.0 1004.6 1002.2 1001.4 998.8 989.0 984.3 989.9 995.6 1004.6 1006.0 1009.0 984.3 DAY 1 24 27 17 15 18 17 8 1 1 26 6 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 817.0 814.2 814.1 814.5 815.5 812.0 808.6 812.0 815.1 817.8 817.6 816.6 814.6 MAX. QFE PRESSURE IN HPA 820.4 817.8 818.5 819.0 819.3 816.3 812.0 815.0 819.1 821.9 820.9 818.7 821.9 DAY 7 1 3 4 27 2 4 25 13 27 15 31 MIN. QFE PRESSURE IN HPA 813.8 809.3 809.2 810.0 810.9 808.9 804.9 809.0 812.3 813.7 811.4 812.6 804.9 DAY 26 24 14 25 15 18 17 3 5 15 26 25 MEAN QNH PRESSURE IN HPA 1019.7 1016.3 1016.1 1016.6 1017.8 1013.6 1009.6 1013.7 1017.3 1020.5 1020.4 1019.1 1016.7 MAX. QNH PRESSURE IN HPA 1023.7 1020.6 1021.4 1022.0 1022.4 1018.8 1013.6 1017.2 1022.1 1025.5 1024.3 1021.6 1025.5 DAY 7 1 3 4 27 2 4 25 13 27 15 31 MIN. QNH PRESSURE IN HPA 1015.8 1010.4 1010.3 1011.2 1012.3 1009.9 1005.1 1010.0 1014.0 1015.7 1012.9 1014.3 1005.1 DAY 26 24 14 25 15 18 17 3 5 15 26 25 MEAN QFF PRESSURE IN HPA 1019.3 1014.9 1012.5 1009.0 1005.9 997.5 990.6 996.7 1004.0 1012.7 1017.7 1019.3 1008.3 MAX. QFF PRESSURE IN HPA 1025.8 1020.5 1019.5 1015.0 1012.8 1008.4 996.6 1000.1 1007.9 1021.6 1025.9 1025.5 1025.9 DAY 8 26 3 1 27 1 27 19 23 28 28 31 MIN. QFF PRESSURE IN HPA 1013.0 1006.8 1004.1 1004.6 1000.6 992.3 984.0 991.8 999.0 1007.8 1009.5 1010.3 984.0 DAY 1 24 14 17 15 18 17 3 1 8 26 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 818.2 815.3 815.1 815.5 816.2 812.6 808.9 812.5 815.9 818.8 818.8 817.7 815.5 MAX. QFE PRESSURE IN HPA 821.9 818.9 819.8 820.5 819.9 816.9 812.3 815.3 820.0 823.2 822.3 820.2 823.2 DAY 7 1 3 4 27 2 4 25 13 27 15 19 MIN. QFE PRESSURE IN HPA 814.8 810.3 810.0 811.0 811.7 809.8 805.4 809.3 812.8 815.1 812.7 813.3 805.4 DAY 1 24 27 25 15 17 17 3 5 15 26 25 MEAN QNH PRESSURE IN HPA 1021.0 1017.5 1017.3 1017.8 1018.6 1014.3 1010.0 1014.3 1018.3 1021.8 1021.7 1020.4 1017.8 MAX. QNH PRESSURE IN HPA 1025.5 1021.9 1023.0 1023.8 1023.1 1019.5 1014.0 1017.6 1023.2 1027.0 1025.9 1023.4 1027.0 DAY 7 1 3 4 27 2 4 25 13 27 15 19 MIN. QNH PRESSURE IN HPA 1017.0 1011.6 1011.2 1012.4 1013.3 1011.0 1005.7 1010.4 1014.6 1017.3 1014.5 1015.2 1005.7 DAY 1 24 27 25 15 17 17 3 5 15 26 25 MEAN QFF PRESSURE IN HPA 1019.3 1015.2 1012.3 1009.2 1006.1 997.9 989.8 995.9 1003.1 1011.8 1016.5 1019.9 1008.1 MAX. QFF PRESSURE IN HPA 1024.7 1021.1 1020.3 1015.1 1011.7 1008.7 995.3 998.9 1007.0 1018.8 1023.2 1026.4 1026.4 DAY 7 12 3 4 27 1 29 18 22 27 30 31 MIN. QFF PRESSURE IN HPA 1013.2 1007.4 1004.6 1004.5 1001.3 992.7 983.9 991.0 996.5 1006.1 1008.6 1012.9 983.9 DAY 1 24 27 17 15 23 17 8 1 13 6 25 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 816.9 814.2 814.1 814.5 815.2 811.6 807.9 811.5 814.6 817.4 817.2 816.5 814.3 MAX. QFE PRESSURE IN HPA 820.5 817.2 818.7 818.8 818.4 815.8 811.0 814.1 818.3 821.3 820.5 818.6 821.3 DAY 7 1 3 4 3 2 4 11 13 27 15 19 MIN. QFE PRESSURE IN HPA 812.3 810.0 809.4 810.2 810.6 808.6 804.3 808.3 811.8 813.7 811.6 812.0 804.3 DAY 1 24 27 25 15 17 17 8 4 20 26 25 MEAN QNH PRESSURE IN HPA 1019.4 1016.2 1016.1 1016.6 1017.4 1013.1 1008.8 1013.0 1016.7 1020.1 1019.8 1019.0 1016.4 MAX. QNH PRESSURE IN HPA 1023.8 1019.8 1021.6 1021.8 1021.3 1018.2 1012.4 1016.1 1021.2 1024.8 1023.8 1021.5 1024.8 DAY 7 1 3 4 3 2 4 11 13 27 15 19 MIN. QNH PRESSURE IN HPA 1014.0 1011.2 1010.5 1011.5 1011.9 1009.5 1004.4 1009.2 1013.4 1015.7 1013.1 1013.6 1004.4 DAY 1 24 27 25 15 17 17 8 4 20 26 25 MEAN QFF PRESSURE IN HPA 1017.0 1013.1 1010.7 1007.8 1004.6 996.6 988.7 994.7 1001.5 1009.8 1013.9 1017.5 1006.3 MAX. QFF PRESSURE IN HPA 1022.0 1017.0 1018.8 1012.6 1009.2 1006.9 993.6 997.5 1005.0 1018.2 1021.7 1022.4 1022.4 DAY 7 12 2 1 26 1 4 19 22 29 30 30 MIN. QFF PRESSURE IN HPA 1009.5 1006.1 1003.5 1002.7 1000.2 991.8 983.1 989.4 996.6 1004.8 1007.8 1010.6 983.1 DAY 1 9 27 15 15 23 17 8 1 13 6 25 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 815.5 812.7 812.6 813.0 813.9 810.2 806.7 810.1 813.1 815.9 815.8 815.3 812.9 MAX. QFE PRESSURE IN HPA 819.5 815.7 816.8 817.2 817.2 814.7 809.6 812.7 817.0 819.7 819.0 817.4 819.7 DAY 7 2 3 4 26 1 4 25 13 24 15 1 MIN. QFE PRESSURE IN HPA 812.1 808.6 808.4 809.2 809.4 807.1 803.9 806.8 810.4 812.4 810.8 810.6 803.9 DAY 1 24 27 16 15 17 16 3 4 15 26 25 MEAN QNH PRESSURE IN HPA 1017.8 1014.4 1014.3 1014.9 1015.9 1011.5 1007.3 1011.3 1014.9 1018.3 1018.2 1017.5 1014.7 MAX. QNH PRESSURE IN HPA 1022.6 1018.1 1019.4 1019.8 1019.8 1016.9 1010.7 1014.5 1019.6 1022.8 1022.0 1020.1 1022.8 DAY 7 2 3 4 26 1 4 25 13 24 15 1 MIN. QNH PRESSURE IN HPA 1013.7 1009.5 1009.3 1010.3 1010.5 1007.8 1003.9 1007.4 1011.7 1014.1 1012.2 1011.9 1003.9 DAY 1 24 27 16 15 17 16 3 4 15 26 25 MEAN QFF PRESSURE IN HPA 1015.5 1011.6 1009.2 1006.2 1003.9 995.5 988.1 993.6 1000.3 1008.4 1012.6 1016.0 1005.1 MAX. QFF PRESSURE IN HPA 1022.2 1017.1 1016.3 1010.8 1008.6 1005.4 993.1 996.3 1003.7 1016.1 1020.0 1020.8 1022.2 DAY 7 15 3 4 26 1 28 19 28 28 30 30 MIN. QFF PRESSURE IN HPA 1010.5 1004.1 1002.4 1001.1 998.8 990.1 983.5 988.5 996.7 1003.5 1006.7 1007.6 983.5 DAY 1 23 27 17 15 13 20 8 9 12 6 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.1 813.2 812.9 813.4 814.2 810.0 806.5 810.2 813.2 816.3 816.4 815.8 813.2 MAX. QFE PRESSURE IN HPA 820.5 816.1 816.8 816.9 818.5 815.2 809.3 813.0 817.2 820.3 819.4 818.1 820.5 DAY 7 2 3 4 26 2 28 25 13 26 14 31 MIN. QFE PRESSURE IN HPA 813.0 809.4 808.7 809.0 809.4 806.8 803.1 807.3 810.2 812.5 811.8 812.1 803.1 DAY 1 27 14 16 15 17 16 8 4 20 26 25 MEAN QNH PRESSURE IN HPA 1018.5 1015.0 1014.7 1015.4 1016.2 1011.2 1007.0 1011.4 1015.1 1018.7 1018.9 1018.1 1015.0 MAX. QNH PRESSURE IN HPA 1023.8 1018.5 1019.4 1019.5 1021.4 1017.5 1010.4 1014.8 1019.8 1023.6 1022.5 1020.9 1023.8 DAY 7 2 3 4 26 2 28 25 13 26 14 31 MIN. QNH PRESSURE IN HPA 1014.8 1010.5 1009.7 1010.0 1010.5 1007.4 1003.0 1008.0 1011.5 1014.2 1013.4 1013.7 1003.0 DAY 1 27 14 16 15 17 16 8 4 20 26 25 MEAN QFF PRESSURE IN HPA 1018.1 1013.7 1010.9 1007.7 1004.4 995.0 988.1 994.6 1001.9 1010.8 1016.3 1018.3 1006.6 MAX. QFF PRESSURE IN HPA 1026.4 1017.7 1017.7 1012.8 1011.1 1006.8 993.5 997.9 1005.1 1019.8 1024.1 1024.0 1026.4 DAY 7 2 3 1 26 1 27 25 23 29 27 31 MIN. QFF PRESSURE IN HPA 1013.5 1006.9 1004.5 1003.3 999.1 990.3 983.0 990.0 998.2 1005.2 1009.0 1010.3 983.0 DAY 12 23 26 17 15 22 16 3 4 12 7 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 817.0 814.2 814.0 814.2 815.0 811.0 807.6 811.4 814.3 817.2 817.2 816.7 814.1 MAX. QFE PRESSURE IN HPA 821.1 816.8 817.6 817.7 820.0 816.2 810.2 813.9 817.7 821.2 820.4 819.1 821.2 DAY 7 21 3 3 26 1 28 25 12 24 14 23 MIN. QFE PRESSURE IN HPA 812.8 809.8 809.7 809.8 810.0 807.6 803.9 808.8 811.2 813.0 812.4 814.4 803.9 DAY 25 23 29 16 14 17 16 3 4 14 25 6 MEAN QNH PRESSURE IN HPA 1019.6 1016.2 1016.0 1016.2 1017.3 1012.4 1008.3 1012.9 1016.4 1019.8 1019.9 1019.2 1016.2 MAX. QNH PRESSURE IN HPA 1024.5 1019.4 1020.3 1020.4 1023.2 1018.6 1011.5 1015.9 1020.4 1024.6 1023.7 1022.1 1024.6 DAY 7 21 3 3 26 1 28 25 12 24 14 23 MIN. QNH PRESSURE IN HPA 1014.6 1011.0 1010.9 1011.0 1011.2 1008.4 1003.9 1009.8 1012.7 1014.8 1014.1 1016.5 1003.9 DAY 25 23 29 16 14 17 16 3 4 14 25 6 MEAN QFF PRESSURE IN HPA 1017.9 1014.0 1010.9 1007.5 1004.7 995.7 988.2 994.5 1001.5 1009.9 1014.8 1018.7 1006.5 MAX. QFF PRESSURE IN HPA 1023.5 1019.0 1018.1 1011.5 1012.0 1007.9 993.6 997.2 1005.5 1018.0 1022.8 1024.6 1024.6 DAY 7 14 2 3 26 1 28 25 22 29 27 30 MIN. QFF PRESSURE IN HPA 1011.5 1005.4 1003.9 1002.9 999.0 989.2 982.9 990.9 997.4 1003.7 1007.8 1012.2 982.9 DAY 25 23 26 16 14 13 16 8 6 14 6 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 816.9 813.9 813.8 814.1 814.9 810.9 807.7 811.2 814.3 817.0 817.1 816.4 814.0 MAX. QFE PRESSURE IN HPA 820.7 816.3 817.7 817.7 819.5 815.9 811.0 813.5 817.6 821.2 820.4 818.6 821.2 DAY 7 1 2 3 26 1 3 25 13 24 14 30 MIN. QFE PRESSURE IN HPA 812.8 809.2 809.9 809.4 810.0 807.2 803.7 808.5 811.2 813.0 811.8 814.1 803.7 DAY 25 23 14 24 14 17 16 3 4 14 25 5 MEAN QNH PRESSURE IN HPA 1019.4 1015.9 1015.8 1016.1 1017.0 1012.3 1008.4 1012.7 1016.4 1019.7 1019.7 1018.9 1016.0 MAX. QNH PRESSURE IN HPA 1024.0 1018.8 1020.4 1020.4 1022.6 1018.3 1012.4 1015.4 1020.3 1024.6 1023.7 1021.5 1024.6 DAY 7 1 2 3 26 1 3 25 13 24 14 30 MIN. QNH PRESSURE IN HPA 1014.6 1010.3 1011.1 1010.5 1011.2 1007.9 1003.7 1009.4 1012.7 1014.8 1013.4 1016.1 1003.7 DAY 25 23 14 24 14 17 16 3 4 14 25 5 MEAN QFF PRESSURE IN HPA 1017.0 1012.9 1010.3 1007.1 1004.1 995.5 988.3 994.3 1001.3 1009.5 1013.9 1017.5 1006.0 MAX. QFF PRESSURE IN HPA 1022.0 1017.7 1017.3 1011.6 1010.7 1006.7 994.1 998.0 1004.6 1018.1 1021.5 1022.9 1022.9 DAY 7 10 2 10 26 1 3 11 28 29 27 30 MIN. QFF PRESSURE IN HPA 1010.5 1004.0 1002.2 1002.0 998.7 989.1 982.2 990.9 996.8 1004.7 1006.7 1010.3 982.2 DAY 25 23 26 16 14 17 16 8 7 14 25 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.4 6.3 9.2 14.3 20.1 26.0 26.5 25.7 24.6 16.0 7.8 5.0 15.2 MINIMUN AIR TEMPERATURE (C) -4.6 -0.7 3.5 5.5 10.1 15.6 18.4 15.9 12.1 4.8 -1.4 -4.5 6.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 0 0 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 17 6 0 0 0 0 0 0 0 2 6 19 50 DAYS WITH FREEZING MIN.<= 0 29 15 5 2 0 0 0 0 0 5 21 29 106 TEMPERATURE RECORDS LOWEST(C) -16.0 -10.0 -2.0 -2.4 4.0 11.2 13.0 10.0 7.0 -6.0 -6.8 -13.0 -16.0 DAY 16 25 1 7 1 19 6 4 30 21 13 4 MAXIMUM AIR TEMPERATURE (C) 7.6 13.5 15.2 22.0 28.1 33.4 32.5 33.1 32.2 24.6 17.2 15.0 22.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 29 30 30 23 0 0 0 121 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 15.2 19.4 20.5 26.4 34.0 35.6 36.2 34.6 35.6 29.5 23.8 19.0 36.2 DAY 29 9 31 23 31 11 12 8 11 1 5 28 DIF. BETWEEN (MAX.-MIN.) (C) 12.2 14.2 11.7 16.5 18.0 17.8 14.1 17.2 20.1 19.8 18.6 19.5 16.7 MEAN DAILY TEMP. (MDT) (C) 1.5 6.4 9.3 13.8 19.1 24.5 25.4 24.5 22.2 14.7 7.9 5.3 14.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 11.9 106.2 137.7 108.7 45.0 0.0 0.0 0.0 409.6 HEATING DEG. DAYS(BASE 18 0C) 511.1 337.2 268.6 126.7 15.0 0.0 0.0 0.0 0.0 108.4 302.8 393.8 2063.6 DEWPOINT (MEAN C) -4.4 -2.3 0.9 -0.4 2.0 1.7 0.9 1.6 0.1 -6.5 -8.1 -9.1 -2.0 MIXING RATIO (G/KG) 3.57 4.24 5.29 4.89 5.60 5.75 5.16 5.47 4.89 3.21 2.72 2.48 4.44 VAPOUR PRESSURE (HPA) 4.64 5.50 6.84 6.35 7.26 7.43 6.68 7.08 6.34 4.20 3.55 3.25 5.76 SATURATION DEF. (HPA) 2.70 4.64 5.24 11.01 17.73 27.71 28.98 27.40 26.77 16.00 8.17 6.39 15.23 RELATIVE HUMIDITY (MEAN %) 70 60 62 43 35 24 20 23 22 24 36 39 38 RELATIVE HUMIDITY (MAX. %) 91 85 89 74 60 41 30 36 36 44 57 60 59 RELATIVE HUMIDITY (MIN. %) 44 34 35 22 16 13 13 14 12 13 19 21 21 RELATIVE HUMIDITY (MEAN% 03UTC) 85 83 85 67 56 37 29 35 36 44 55 56 56 RELATIVE HUMIDITY (MEAN% 09UTC) 56 42 45 28 18 14 14 16 15 17 23 25 26 RELATIVE HUMIDITY (MEAN% 15UTC) 60 46 47 28 23 16 16 16 16 21 29 31 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.6 41.5 59.8 23.5 4.0 0.3 1.0 0.0 0.0 0.0 1.3 1.2 168.2 DAYS WITH PRECIPITATION >=10 1 1 2 1 0 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 3 4 6 2 0 0 0 0 0 0 0 0 15 DAYS WITH PRECIPITATION >= 1 6 6 10 3 3 0 1 0 0 0 1 1 31 DAYS WITH PRECIPITATION 8 8 10 4 3 1 1 0 0 0 2 1 38 GREATEST DAILY PRECIPITATION 13.8 19.0 13.0 14.3 2.0 0.3 1.0 0.0 0.0 0.0 1.0 1.2 19.0 DAY 12 5 4 16 22 13 7 ** ** ** 29 15 DAY WITH THUNDER STORM 0 0 2 2 5 0 0 0 0 0 0 0 9 DAYS WITH SNOW OR SLEET 4 1 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH DUST 0 1 3 2 0 3 4 1 5 1 2 0 22 WIND DIRECTION (PREVAILING) 135 180 225 270 270 360 360 360 45 225 45 45 360 PREVAILING WIND SPEED(KNOTS) 7.1 8.0 9.9 10.3 9.9 14.3 14.2 11.6 7.9 8.7 6.6 6.6 12.8 PREVAILING WIND PERCENT 7.7 15.5 14.9 16.3 13.3 13.8 43.1 30.2 11.2 14.4 8.3 9.3 10.3 CALMS PERCENT OF WIND 62.5 32.8 40.3 51.7 44.0 35.0 14.9 24.2 41.2 47.6 67.5 68.5 44.2 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 187 187 240 248 2814 VECTOR WIND DIRECTION (MEAN) 161 190 206 249 291 10 15 19 359 266 261 149 349 VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.2 2.9 2.2 1.2 1.1 7.8 4.5 0.5 0.9 0.1 0.4 0.7 WIND STEADINESES (MEAN %) 25.0 19.4 51.8 46.8 24.5 17.5 77.2 60.8 10.4 19.1 4.2 17.4 13.5 WIND SPEED (MEAN KNOTS) 2.8 6.2 5.6 4.7 4.9 6.3 10.1 7.4 4.8 4.7 2.4 2.3 5.2 FASTEST WIND DIRECTION 170 240 280 220 300 210 20 30 360 270 340 270 220 FASTEST WIND SPEED (KNOTS) 14 31 29 35 29 27 27 23 17 23 23 19 35 DAY 6 5 14 13 6 12 13 29 1 16 18 15 DAYS WITH SKY CLEAR (0-2)/8 13 11 5 14 17 23 26 29 30 29 19 25 241 DAYS WITH P.CLOUDY (3-6)/8 12 12 16 11 13 7 4 2 0 2 8 5 92 DAYS WITH CLOUDY (7-8)/8 6 6 10 5 1 0 1 0 0 0 3 1 33 DAYS WITH VISIBILITY =< 2 KM 8 0 1 0 0 0 0 0 0 0 0 0 9 DURATION OF SUNSHINE HOURS 181.2 190.7 192.0 265.1 295.5 324.9 343.1 344.0 325.0 315.4 242.7 272.6 3292.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.0 813.6 812.2 814.5 814.5 811.5 811.3 812.3 813.6 817.4 818.1 818.0 814.3 MAX. QFE PRESSURE IN HPA 820.3 819.0 816.9 819.6 819.0 816.0 817.1 817.6 820.5 822.0 825.4 823.1 825.4 DAY-HOUR 2- 6 8- 6 29- 6 8- 6 7-21 1- 6 3- 6 31- 6 25- 6 13- 6 19- 6 8- 6 MIN. QFE PRESSURE IN HPA 806.2 806.1 806.8 810.2 809.6 806.3 806.6 807.9 807.2 811.2 812.7 812.6 806.1 DAY-HOUR 12-12 5- 9 14-12 10-12 29-15 19-15 12-15 8-15 20-12 5-12 28-12 15-12 MEAN QNH PRESSURE IN HPA 1017.2 1015.5 1013.8 1016.7 1016.7 1013.0 1012.8 1013.9 1015.6 1020.0 1020.9 1020.8 1016.4 MAX. QNH PRESSURE IN HPA 1023.6 1022.0 1019.5 1022.7 1022.0 1018.4 1019.7 1020.3 1023.8 1025.6 1029.7 1026.9 1029.7 DAY-HOUR 2- 6 8- 6 29- 6 8- 6 7-21 1- 6 3- 6 31- 6 25- 6 13- 6 19- 6 8- 6 MIN. QNH PRESSURE IN HPA 1006.7 1006.6 1007.4 1011.5 1010.7 1006.8 1007.2 1008.7 1007.9 1012.7 1014.5 1014.3 1006.6 DAY-HOUR 12-12 5- 9 14-12 10-12 29-15 19-15 12-15 8-15 20-12 5-12 28-12 15-12 MEAN QFF PRESSURE IN HPA 1018.2 1012.4 1008.3 1007.6 1003.4 995.5 995.0 996.7 1001.1 ****** 1017.0 1019.3 ****** MAX. QFF PRESSURE IN HPA 1030.5 1021.8 1016.4 1016.9 1012.2 1002.4 1001.5 1005.3 1009.4 ****** 1030.6 1030.9 ****** DAY-HOUR 16- 6 14- 3 30- 3 7- 3 8- 3 1- 6 4- 6 31- 3 25- 3 **-** 19- 3 4- 3 MIN. QFF PRESSURE IN HPA 1007.5 1001.5 1001.2 1001.9 994.2 989.4 988.4 990.8 994.9 ****** 1008.6 1010.2 ****** DAY-HOUR 12-12 5- 9 19-12 10-12 29-15 20- 0 12-12 14-12 20-15 **-** 2-12 15-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 814.6 813.4 811.6 814.1 814.2 811.3 811.0 812.1 ****** ****** 817.9 817.9 ****** MAX. QFE PRESSURE IN HPA 818.5 818.2 815.1 818.0 817.5 815.0 815.7 816.0 ****** ****** 823.4 821.5 ****** DAY 29 9 30 8 8 1 4 31 ** ** 19 8 MIN. QFE PRESSURE IN HPA 807.3 806.9 807.3 811.0 810.6 807.1 808.2 809.2 ****** ****** 813.5 815.0 ****** DAY 12 5 17 11 30 20 12 9 ** ** 29 15 MEAN QNH PRESSURE IN HPA 1016.8 1015.3 1013.1 1016.1 1016.2 1012.8 1012.4 1013.7 ****** ****** 1020.6 1020.7 ****** MAX. QNH PRESSURE IN HPA 1021.4 1021.0 1017.3 1020.8 1020.2 1017.2 1018.1 1018.4 ****** ****** 1027.3 1025.0 ****** DAY 29 9 30 8 8 1 4 31 ** ** 19 8 MIN. QNH PRESSURE IN HPA 1008.0 1007.5 1008.0 1012.4 1011.9 1007.8 1009.1 1010.3 ****** ****** 1015.4 1017.2 ****** DAY 12 5 17 11 30 20 12 9 ** ** 29 15 MEAN QFF PRESSURE IN HPA 1017.2 1011.7 1007.3 1006.9 1003.2 995.6 994.7 996.5 ****** ****** 1016.1 1018.3 ****** MAX. QFF PRESSURE IN HPA 1025.7 1020.1 1013.2 1014.2 1008.4 1000.9 1000.0 1001.9 ****** ****** 1026.1 1026.9 ****** DAY 16 14 1 7 8 1 4 31 ** ** 19 4 MIN. QFF PRESSURE IN HPA 1008.7 1003.3 1002.2 1002.8 994.3 989.4 989.9 992.0 ****** ****** 1009.5 1011.0 ****** DAY 12 5 17 11 30 20 13 14 ** ** 2 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.0 813.8 812.5 815.0 815.3 812.4 812.0 813.2 814.2 817.9 818.6 818.5 814.9 MAX. QFE PRESSURE IN HPA 818.6 818.7 816.1 818.7 819.0 815.6 816.7 817.0 819.1 820.9 824.3 822.4 824.3 DAY 26 9 30 8 8 1 3 31 25 13 19 8 MIN. QFE PRESSURE IN HPA 807.5 808.0 807.7 811.8 812.2 808.7 808.7 810.2 810.1 813.3 813.8 815.3 807.5 DAY 12 5 17 11 30 20 12 14 20 5 29 25 MEAN QNH PRESSURE IN HPA 1017.2 1015.8 1014.2 1017.2 1017.5 1014.1 1013.6 1015.0 1016.3 1020.7 1021.5 1021.4 1017.0 MAX. QNH PRESSURE IN HPA 1021.5 1021.6 1018.5 1021.6 1022.0 1017.9 1019.2 1019.6 1022.1 1024.3 1028.3 1026.1 1028.3 DAY 26 9 30 8 8 1 3 31 25 13 19 8 MIN. QNH PRESSURE IN HPA 1008.2 1008.8 1008.5 1013.4 1013.9 1009.7 1009.7 1011.5 1011.3 1015.2 1015.8 1017.6 1008.2 DAY 12 5 17 11 30 20 12 14 20 5 29 25 MEAN QFF PRESSURE IN HPA 1019.3 1013.9 1009.7 1009.0 1004.9 997.0 996.3 998.8 1002.4 1013.3 1019.5 1021.7 1008.8 MAX. QFF PRESSURE IN HPA 1029.0 1021.8 1016.4 1016.9 1012.2 1001.2 1001.4 1005.3 1009.4 1021.8 1030.6 1030.9 1030.9 DAY 16 14 30 7 8 2 3 31 25 21 19 4 MIN. QFF PRESSURE IN HPA 1010.6 1006.6 1003.7 1004.2 998.2 992.3 991.0 993.3 997.8 1004.4 1011.9 1012.7 991.0 DAY 12 16 17 27 30 20 12 14 21 6 2 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.4 814.9 813.5 815.8 816.0 812.8 812.6 813.7 815.1 818.8 819.7 819.6 815.7 MAX. QFE PRESSURE IN HPA 820.3 819.0 816.9 819.6 818.9 816.0 817.1 817.6 820.5 822.0 825.4 823.1 825.4 DAY 2 8 29 8 17 1 3 31 25 13 19 8 MIN. QFE PRESSURE IN HPA 808.2 808.2 808.9 813.2 812.9 809.4 809.1 810.6 810.9 814.2 814.5 815.6 808.2 DAY 12 5 17 11 29 20 12 14 20 5 29 15 MEAN QNH PRESSURE IN HPA 1018.9 1017.1 1015.4 1018.2 1018.4 1014.6 1014.3 1015.7 1017.3 1021.8 1022.8 1022.7 1018.1 MAX. QNH PRESSURE IN HPA 1023.6 1022.0 1019.5 1022.7 1021.9 1018.4 1019.7 1020.3 1023.8 1025.6 1029.7 1026.9 1029.7 DAY 2 8 29 8 17 1 3 31 25 13 19 8 MIN. QNH PRESSURE IN HPA 1009.1 1009.1 1009.9 1015.1 1014.7 1010.5 1010.2 1011.9 1012.3 1016.3 1016.6 1017.9 1009.1 DAY 12 5 17 11 29 20 12 14 20 5 29 15 MEAN QFF PRESSURE IN HPA 1020.0 1014.0 1010.0 1008.7 1004.7 996.8 996.2 997.9 ****** ****** 1018.6 1021.0 ****** MAX. QFF PRESSURE IN HPA 1030.5 1020.7 1015.6 1015.7 1010.8 1002.4 1001.5 1004.7 ****** ****** 1030.5 1028.4 ****** DAY 16 24 29 7 7 1 4 31 ** ** 19 4 MIN. QFF PRESSURE IN HPA 1010.8 1007.4 1005.0 1004.7 997.8 992.9 990.2 992.9 ****** ****** 1011.3 1014.2 ****** DAY 12 22 17 25 29 23 12 14 ** ** 2 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.2 813.8 812.5 814.9 814.9 811.8 811.5 812.4 813.8 817.4 818.1 818.1 814.5 MAX. QFE PRESSURE IN HPA 819.2 817.7 815.8 818.3 818.1 815.0 816.4 815.8 819.2 820.6 823.7 822.2 823.7 DAY 26 8 30 8 17 1 3 30 25 13 18 8 MIN. QFE PRESSURE IN HPA 806.8 806.1 807.9 812.0 811.6 808.6 808.5 809.8 809.1 812.6 813.3 813.6 806.1 DAY 12 5 17 10 29 19 12 9 20 6 29 15 MEAN QNH PRESSURE IN HPA 1017.5 1015.8 1014.2 1017.1 1017.1 1013.3 1013.1 1014.1 1015.7 1020.1 1021.0 1020.9 1016.7 MAX. QNH PRESSURE IN HPA 1022.2 1020.4 1018.2 1021.2 1020.9 1017.2 1018.9 1018.2 1022.2 1023.9 1027.6 1025.8 1027.6 DAY 26 8 30 8 17 1 3 30 25 13 18 8 MIN. QNH PRESSURE IN HPA 1007.4 1006.6 1008.7 1013.6 1013.1 1009.5 1009.4 1011.0 1010.2 1014.3 1015.2 1015.5 1006.6 DAY 12 5 17 10 29 19 12 9 20 6 29 15 MEAN QFF PRESSURE IN HPA 1018.1 1012.1 1008.3 1007.8 1003.4 995.5 995.0 996.2 ****** ****** 1016.2 1018.4 ****** MAX. QFF PRESSURE IN HPA 1027.1 1017.4 1013.8 1015.0 1008.8 1001.2 1001.4 1002.0 ****** ****** 1028.1 1025.4 ****** DAY 16 14 29 7 7 1 3 31 ** ** 19 4 MIN. QFF PRESSURE IN HPA 1007.9 1001.5 1003.2 1004.3 997.1 991.4 989.9 992.4 ****** ****** 1009.5 1011.9 ****** DAY 12 5 17 27 29 25 12 10 ** ** 2 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.9 812.4 811.1 813.5 813.5 810.5 810.3 811.1 812.2 816.0 816.9 816.8 813.2 MAX. QFE PRESSURE IN HPA 817.7 816.6 814.3 816.8 816.8 813.8 815.5 814.7 817.6 819.4 822.6 820.7 822.6 DAY 28 19 30 7 7 3 3 30 25 13 18 8 MIN. QFE PRESSURE IN HPA 806.2 806.3 806.8 810.2 810.3 807.0 807.0 808.4 807.2 811.2 812.7 812.6 806.2 DAY 12 5 14 10 29 19 12 8 20 5 28 15 MEAN QNH PRESSURE IN HPA 1015.9 1014.0 1012.6 1015.4 1015.4 1011.8 1011.6 1012.6 1013.9 1018.4 1019.5 1019.4 1015.0 MAX. QNH PRESSURE IN HPA 1020.4 1019.1 1016.4 1019.4 1019.4 1015.8 1017.8 1016.9 1020.3 1022.5 1026.3 1024.0 1026.3 DAY 28 19 30 7 7 3 3 30 25 13 18 8 MIN. QNH PRESSURE IN HPA 1006.7 1006.8 1007.4 1011.5 1011.6 1007.6 1007.6 1009.3 1007.9 1012.7 1014.5 1014.3 1006.7 DAY 12 5 14 10 29 19 12 8 20 5 28 15 MEAN QFF PRESSURE IN HPA 1016.2 1010.5 1006.7 1006.3 1002.4 994.6 993.9 995.3 ****** ****** 1015.0 1016.8 ****** MAX. QFF PRESSURE IN HPA 1024.9 1016.5 1012.0 1014.2 1009.1 999.7 1000.3 1000.6 ****** ****** 1024.6 1024.3 ****** DAY 15 23 1 7 7 3 3 31 ** ** 18 4 MIN. QFF PRESSURE IN HPA 1007.5 1002.7 1001.2 1001.9 995.8 989.7 988.4 990.8 ****** ****** 1008.6 1010.2 ****** DAY 12 5 19 10 29 25 12 14 ** ** 2 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.5 812.9 811.5 813.7 813.6 810.3 810.4 811.2 812.4 816.5 817.4 817.4 813.5 MAX. QFE PRESSURE IN HPA 818.5 817.5 814.5 817.0 818.0 813.3 815.7 814.7 817.6 820.1 822.8 820.7 822.8 DAY 26 8 29 7 7 1 3 30 25 2 15 8 MIN. QFE PRESSURE IN HPA 807.0 808.1 807.2 810.8 809.6 806.3 806.6 807.9 807.5 811.5 813.5 813.7 806.3 DAY 12 5 16 10 29 19 12 8 20 5 28 15 MEAN QNH PRESSURE IN HPA 1016.6 1014.7 1013.0 1015.7 1015.5 1011.6 1011.7 1012.7 1014.1 1019.0 1020.1 1020.0 1015.4 MAX. QNH PRESSURE IN HPA 1021.4 1020.2 1016.6 1019.6 1020.8 1015.2 1018.1 1016.9 1020.3 1023.3 1026.5 1024.0 1026.5 DAY 26 8 29 7 7 1 3 30 25 2 15 8 MIN. QNH PRESSURE IN HPA 1007.6 1008.9 1007.9 1012.2 1010.7 1006.8 1007.2 1008.7 1008.2 1013.0 1015.4 1015.7 1006.8 DAY 12 5 16 10 29 19 12 8 20 5 28 15 MEAN QFF PRESSURE IN HPA 1018.5 1012.8 1008.5 1007.5 1002.9 994.7 994.4 996.5 1000.2 1011.7 1018.1 1020.2 1007.2 MAX. QFF PRESSURE IN HPA 1027.5 1019.2 1014.0 1015.9 1011.8 998.3 1000.8 1003.1 1007.8 1019.4 1029.0 1027.9 1029.0 DAY 15 24 1 7 7 2 3 31 25 21 18 4 MIN. QFF PRESSURE IN HPA 1009.2 1007.0 1003.8 1002.4 994.2 990.9 988.5 991.4 994.9 1002.2 1011.9 1012.4 988.5 DAY 12 16 19 27 29 24 12 8 20 5 6 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 815.3 813.9 812.4 814.8 814.6 811.3 811.3 812.2 ****** ****** 818.2 818.2 ****** MAX. QFE PRESSURE IN HPA 819.5 819.0 815.4 817.8 818.0 814.1 816.3 815.6 ****** ****** 824.3 821.5 ****** DAY 2 8 29 7 7 1 3 30 ** ** 18 7 MIN. QFE PRESSURE IN HPA 807.4 809.6 807.9 811.6 810.7 807.1 808.0 808.9 ****** ****** 814.1 814.8 ****** DAY 12 5 16 5 29 19 11 8 ** ** 29 15 MEAN QNH PRESSURE IN HPA 1017.5 1015.9 1014.1 1016.9 1016.7 1012.8 1012.8 1013.9 ****** ****** 1021.0 1021.0 ****** MAX. QNH PRESSURE IN HPA 1022.6 1022.0 1017.7 1020.6 1020.8 1016.1 1018.8 1017.9 ****** ****** 1028.3 1025.0 ****** DAY 2 8 29 7 7 1 3 30 ** ** 18 7 MIN. QNH PRESSURE IN HPA 1008.1 1010.7 1008.7 1013.1 1012.1 1007.8 1008.8 1009.9 ****** ****** 1016.1 1017.0 ****** DAY 12 5 16 5 29 19 11 8 ** ** 29 15 MEAN QFF PRESSURE IN HPA 1018.7 1012.7 1008.6 1007.4 1002.9 994.9 994.7 996.3 ****** ****** 1016.8 1019.4 ****** MAX. QFF PRESSURE IN HPA 1027.6 1019.4 1014.2 1014.5 1009.6 999.2 1000.7 1002.8 ****** ****** 1027.6 1026.4 ****** DAY 15 23 29 7 7 7 3 31 ** ** 18 3 MIN. QFF PRESSURE IN HPA 1009.9 1006.8 1004.1 1002.9 995.8 990.2 988.4 991.8 ****** ****** 1009.8 1013.8 ****** DAY 12 15 20 3 29 24 12 8 ** ** 1 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 814.9 813.7 812.2 814.6 814.5 811.4 811.3 812.3 ****** ****** 818.0 818.0 ****** MAX. QFE PRESSURE IN HPA 818.9 819.0 815.8 817.8 819.0 814.1 816.1 815.3 ****** ****** 824.3 821.5 ****** DAY 28 8 29 7 7 1 3 31 ** ** 18 7 MIN. QFE PRESSURE IN HPA 806.9 808.4 807.9 811.6 810.4 807.1 808.0 808.9 ****** ****** 813.8 814.8 ****** DAY 12 4 16 3 29 19 11 8 ** ** 28 15 MEAN QNH PRESSURE IN HPA 1017.1 1015.7 1013.9 1016.8 1016.6 1012.9 1012.8 1014.0 ****** ****** 1020.8 1020.8 ****** MAX. QNH PRESSURE IN HPA 1021.9 1022.0 1018.2 1020.6 1022.0 1016.1 1018.5 1017.6 ****** ****** 1028.3 1025.0 ****** DAY 28 8 29 7 7 1 3 31 ** ** 18 7 MIN. QNH PRESSURE IN HPA 1007.5 1009.3 1008.7 1013.1 1011.7 1007.8 1008.8 1009.9 ****** ****** 1015.8 1017.0 ****** DAY 12 4 16 3 29 19 11 8 ** ** 28 15 MEAN QFF PRESSURE IN HPA 1017.7 1011.9 1007.8 1007.3 1002.6 994.9 994.7 996.1 ****** ****** 1016.1 1018.5 ****** MAX. QFF PRESSURE IN HPA 1026.5 1018.6 1014.7 1014.0 1009.2 999.8 1000.1 1002.0 ****** ****** 1028.5 1026.5 ****** DAY 15 13 29 6 7 1 3 31 ** ** 18 3 MIN. QFF PRESSURE IN HPA 1007.7 1003.8 1003.5 1002.3 995.5 990.1 989.1 991.5 ****** ****** 1009.1 1012.8 ****** DAY 12 4 16 3 29 24 11 8 ** ** 1 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 4.8 7.9 13.1 19.6 25.2 29.8 27.6 22.6 16.6 8.5 4.5 15.3 MINIMUN AIR TEMPERATURE (C) -4.8 -3.7 1.2 5.4 10.1 16.2 20.6 17.6 12.0 7.8 2.3 -1.6 6.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 15 3 0 0 0 0 22 DAYS WITH MINIMUM TEMP. <=-4 20 17 3 0 0 0 0 0 0 0 1 6 47 DAYS WITH FREEZING MIN.<= 0 27 20 13 4 0 0 0 0 0 0 8 24 96 TEMPERATURE RECORDS LOWEST(C) -10.4 -13.6 -7.0 -3.6 5.0 12.0 15.4 7.4 7.4 1.0 -4.0 -7.2 -13.6 DAY 7 8 1 14 3 8 4 31 29 18 25 29 MAXIMUM AIR TEMPERATURE (C) 10.9 13.2 15.0 20.3 27.2 32.5 37.2 35.4 31.6 24.8 15.0 11.4 22.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 6 27 31 31 27 0 0 0 122 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 20.4 19.6 26.0 32.8 36.4 38.8 38.0 34.4 29.8 20.0 14.2 38.8 DAY 1 21 23 28 27 16 21 15 2 2 6 4 DIF. BETWEEN (MAX.-MIN.) (C) 15.7 16.9 13.8 14.9 17.1 16.3 16.6 17.8 19.6 17.0 12.7 13.0 16.0 MEAN DAILY TEMP. (MDT) (C) 3.1 4.8 8.1 12.9 18.6 24.4 28.9 26.5 21.8 16.3 8.6 4.9 14.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 7.1 100.7 244.2 170.7 34.4 0.1 0.0 0.0 557.2 HEATING DEG. DAYS(BASE 18 0C) 463.0 370.9 306.7 154.2 27.1 0.0 0.0 0.0 0.0 67.1 280.8 405.5 2075.4 DEWPOINT (MEAN C) -7.3 -9.0 -3.6 -0.5 -0.8 2.2 4.1 0.8 -4.2 -1.1 0.8 -2.4 -1.7 MIXING RATIO (G/KG) 2.91 2.68 3.93 5.04 4.57 5.74 6.62 5.37 3.57 4.56 5.11 4.01 4.51 VAPOUR PRESSURE (HPA) 3.79 3.49 5.09 6.53 5.94 7.42 8.51 6.94 4.64 5.95 6.65 5.23 5.85 SATURATION DEF. (HPA) 4.37 6.04 6.10 9.34 18.31 26.20 35.30 31.86 24.61 14.35 5.02 3.63 15.43 RELATIVE HUMIDITY (MEAN %) 53 43 51 47 29 25 22 20 18 34 62 64 39 RELATIVE HUMIDITY (MAX. %) 76 71 81 76 51 40 34 33 29 53 85 89 60 RELATIVE HUMIDITY (MIN. %) 31 18 25 24 14 14 12 10 10 19 38 35 21 RELATIVE HUMIDITY (MEAN% 03UTC) 72 65 76 71 46 37 33 32 28 49 83 84 56 RELATIVE HUMIDITY (MEAN% 09UTC) 38 28 32 29 15 16 14 14 12 25 43 44 26 RELATIVE HUMIDITY (MEAN% 15UTC) 42 29 37 32 19 16 14 13 13 27 52 56 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 37.8 2.1 52.5 33.9 0.4 2.3 0.0 0.0 0.0 19.5 15.7 24.2 188.4 DAYS WITH PRECIPITATION >=10 2 0 2 1 0 0 0 0 0 1 1 1 8 DAYS WITH PRECIPITATION >= 5 2 0 3 3 0 0 0 0 0 1 1 3 13 DAYS WITH PRECIPITATION >= 1 3 1 6 7 0 1 0 0 0 3 3 4 28 DAYS WITH PRECIPITATION 4 2 9 8 1 3 0 0 0 4 8 5 44 GREATEST DAILY PRECIPITATION 19.1 2.0 19.4 10.4 0.4 1.0 0.0 0.0 0.0 17.0 12.0 12.0 19.4 DAY 17 27 25 7 9 23 ** ** ** 31 27 21 DAY WITH THUNDER STORM 0 0 1 4 0 0 0 0 0 2 1 0 8 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 5 0 3 2 2 2 3 0 0 0 0 17 WIND DIRECTION (PREVAILING) 180 225 225 225 225 360 45 360 270 270 135 135 225 PREVAILING WIND SPEED(KNOTS) 8.0 11.0 11.8 11.2 8.5 14.2 9.2 13.2 8.9 8.9 7.6 7.6 9.6 PREVAILING WIND PERCENT 9.7 25.3 19.4 17.5 11.7 12.1 19.8 25.0 14.2 13.7 7.5 8.1 10.5 CALMS PERCENT OF WIND 56.0 46.6 38.7 45.0 47.6 37.9 34.7 26.2 47.9 54.8 63.8 62.9 46.8 NO. OF WIND OBSERVATION 248 221 248 240 248 240 248 248 240 248 240 248 2917 VECTOR WIND DIRECTION (MEAN) 172 237 224 255 306 355 52 21 261 265 155 156 267 VECTOR WIND MAGNITUDE(KNOTS) 1.2 3.7 3.6 2.9 1.1 1.7 2.4 3.9 0.7 1.0 0.6 0.6 0.6 WIND STEADINESES (MEAN %) 34.3 64.9 58.1 51.8 23.4 28.8 40.7 52.7 15.9 27.8 21.4 21.4 12.2 WIND SPEED (MEAN KNOTS) 3.5 5.7 6.2 5.6 4.7 5.9 5.9 7.4 4.4 3.6 2.8 2.8 4.9 FASTEST WIND DIRECTION 250 240 220 240 260 360 360 20 20 300 260 240 360 FASTEST WIND SPEED (KNOTS) 19 35 25 27 27 43 23 23 19 16 17 16 43 DAY 30 23 16 11 5 19 28 24 15 2 11 26 DAYS WITH SKY CLEAR (0-2)/8 19 20 16 13 20 22 18 30 28 21 8 16 231 DAYS WITH P.CLOUDY (3-6)/8 8 6 8 11 10 7 13 1 2 8 18 12 104 DAYS WITH CLOUDY (7-8)/8 4 2 7 6 1 1 0 0 0 2 4 3 30 DAYS WITH VISIBILITY =< 2 KM 0 1 0 0 0 1 0 1 0 0 0 0 3 DURATION OF SUNSHINE HOURS 240.3 252.7 248.7 253.3 312.4 312.4 300.8 358.7 325.1 281.1 190.5 216.5 3292.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.5 814.3 812.0 813.5 814.6 811.4 808.5 811.3 815.2 817.7 816.9 815.6 813.8 MAX. QFE PRESSURE IN HPA 820.5 819.6 820.6 817.8 819.3 816.7 811.7 815.1 820.1 822.0 823.5 821.3 823.5 DAY-HOUR 11- 6 17- 6 11- 6 14- 6 12- 6 8- 6 19- 6 31- 6 19- 6 9- 6 8- 6 28-18 MIN. QFE PRESSURE IN HPA 803.9 808.5 806.1 809.7 809.6 805.0 803.7 807.2 811.0 813.6 812.1 810.0 803.7 DAY-HOUR 17-12 1- 0 30- 0 10-12 5-12 19-15 16-12 5-12 2-12 24-12 20-12 10-12 MEAN QNH PRESSURE IN HPA 1016.7 1016.4 1013.7 1015.4 1016.7 1012.9 1009.4 1012.8 1017.4 1020.5 1019.5 1018.0 1015.8 MAX. QNH PRESSURE IN HPA 1023.8 1022.7 1023.9 1020.6 1022.4 1019.2 1013.3 1017.3 1023.3 1025.6 1027.4 1024.8 1027.4 DAY-HOUR 11- 6 17- 6 11- 6 14- 6 12- 6 8- 6 19- 6 31- 6 19- 6 9- 6 8- 6 28-18 MIN. QNH PRESSURE IN HPA 1003.9 1009.4 1006.6 1010.9 1010.7 1005.2 1003.7 1007.9 1012.4 1015.5 1013.7 1011.2 1003.7 DAY-HOUR 17-12 1- 0 30- 0 10-12 5-12 19-15 16-12 5-12 2-12 24-12 20-12 10-12 MEAN QFF PRESSURE IN HPA 1016.5 1014.9 1009.4 1007.2 1003.8 996.0 989.2 994.2 1002.6 1009.8 1014.7 1016.4 1006.2 MAX. QFF PRESSURE IN HPA 1025.7 1026.1 1023.3 1017.2 1011.2 1003.2 994.6 1003.5 1009.3 1016.8 1023.9 1028.2 1028.2 DAY-HOUR 7- 3 8- 3 1- 3 14- 3 7- 6 8- 6 28- 3 30- 3 29- 3 18- 3 30- 3 29- 3 MIN. QFF PRESSURE IN HPA 1001.9 1003.8 1000.1 1000.1 996.8 987.5 983.2 988.7 995.7 1004.8 1007.8 1005.1 983.2 DAY-HOUR 17-12 23- 0 25-12 28-21 31-21 30-21 16-12 1- 9 5-21 14-12 13-12 10-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 814.6 813.8 811.7 813.0 814.3 811.3 808.4 811.1 814.9 817.6 816.7 815.4 813.5 MAX. QFE PRESSURE IN HPA 818.7 816.9 818.6 816.3 816.9 814.6 810.8 813.6 818.3 820.5 821.7 820.2 821.7 DAY 8 8 11 14 12 8 19 17 19 9 8 29 MIN. QFE PRESSURE IN HPA 804.7 808.5 806.1 810.0 811.4 806.2 804.6 807.8 811.7 814.1 813.0 810.0 804.6 DAY 26 1 30 11 5 20 12 1 3 24 20 11 MEAN QNH PRESSURE IN HPA 1016.7 1015.7 1013.2 1014.8 1016.3 1012.8 1009.3 1012.5 1017.1 1020.3 1019.2 1017.7 1015.5 MAX. QNH PRESSURE IN HPA 1021.6 1019.5 1021.5 1018.8 1019.5 1016.7 1012.2 1015.5 1021.2 1023.8 1025.2 1023.4 1025.2 DAY 8 8 11 14 12 8 19 17 19 9 8 29 MIN. QNH PRESSURE IN HPA 1004.9 1009.4 1006.6 1011.2 1012.9 1006.7 1004.8 1008.6 1013.3 1016.1 1014.8 1011.2 1004.8 DAY 26 1 30 11 5 20 12 1 3 24 20 11 MEAN QFF PRESSURE IN HPA 1016.0 1013.5 1008.5 1006.5 1003.6 996.1 989.4 993.9 1002.0 1009.2 1014.1 1015.4 1005.7 MAX. QFF PRESSURE IN HPA 1022.1 1023.3 1020.3 1014.9 1009.3 1002.0 993.5 1001.7 1006.5 1013.1 1021.2 1026.4 1026.4 DAY 20 8 1 14 7 8 23 31 30 18 30 29 MIN. QFF PRESSURE IN HPA 1005.0 1003.8 1001.7 1000.6 998.8 988.2 984.0 988.7 997.9 1005.7 1009.1 1005.7 984.0 DAY 17 23 30 29 5 20 12 1 3 1 20 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.0 814.3 812.4 814.0 815.3 812.3 809.3 812.1 816.1 818.4 817.3 815.9 814.4 MAX. QFE PRESSURE IN HPA 819.3 817.8 819.0 817.0 818.3 816.0 811.5 814.3 818.9 821.2 822.7 820.2 822.7 DAY 8 17 11 14 12 8 22 10 19 13 8 29 MIN. QFE PRESSURE IN HPA 806.6 810.2 807.0 810.3 811.9 807.2 805.7 809.1 813.2 815.0 813.6 811.6 805.7 DAY 26 1 30 11 5 20 16 1 3 24 20 11 MEAN QNH PRESSURE IN HPA 1017.2 1016.4 1014.0 1016.0 1017.5 1014.0 1010.4 1013.7 1018.5 1021.3 1020.0 1018.3 1016.5 MAX. QNH PRESSURE IN HPA 1022.4 1020.6 1022.0 1019.6 1021.2 1018.4 1013.0 1016.4 1021.9 1024.6 1026.4 1023.4 1026.4 DAY 8 17 11 14 12 8 22 10 19 13 8 29 MIN. QNH PRESSURE IN HPA 1007.2 1011.5 1007.6 1011.6 1013.5 1007.9 1006.1 1010.2 1015.1 1017.2 1015.5 1013.1 1006.1 DAY 26 1 30 11 5 20 16 1 3 24 20 11 MEAN QFF PRESSURE IN HPA 1018.5 1016.2 1010.8 1008.6 1005.5 997.4 990.8 996.1 1004.9 1012.1 1016.6 1018.1 1007.9 MAX. QFF PRESSURE IN HPA 1025.7 1026.1 1023.3 1017.2 1010.8 1003.0 994.6 1003.5 1009.3 1016.8 1023.9 1028.2 1028.2 DAY 7 8 1 14 7 8 28 30 29 18 30 29 MIN. QFF PRESSURE IN HPA 1006.0 1005.9 1003.9 1003.8 1000.1 988.9 985.5 990.7 1000.8 1007.6 1010.5 1008.9 985.5 DAY 17 23 30 11 5 20 12 6 3 23 20 11 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.0 815.7 813.5 814.9 816.0 812.9 809.8 812.7 817.0 819.4 818.4 817.2 815.3 MAX. QFE PRESSURE IN HPA 820.5 819.6 820.6 817.8 819.3 816.7 811.7 815.1 820.1 822.0 823.5 821.3 823.5 DAY 11 17 11 14 12 8 19 31 19 9 8 29 MIN. QFE PRESSURE IN HPA 808.0 811.5 808.1 811.0 811.5 808.2 806.1 809.9 813.8 815.6 814.7 813.1 806.1 DAY 17 10 25 11 5 30 16 5 3 24 20 11 MEAN QNH PRESSURE IN HPA 1018.4 1018.0 1015.4 1017.1 1018.4 1014.7 1010.9 1014.5 1019.6 1022.5 1021.2 1019.9 1017.5 MAX. QNH PRESSURE IN HPA 1023.8 1022.7 1023.9 1020.6 1022.4 1019.2 1013.3 1017.3 1023.3 1025.6 1027.4 1024.8 1027.4 DAY 11 17 11 14 12 8 19 31 19 9 8 29 MIN. QNH PRESSURE IN HPA 1008.8 1013.0 1008.9 1012.4 1013.0 1009.1 1006.6 1011.1 1015.8 1017.9 1016.9 1014.9 1006.6 DAY 17 10 25 11 5 30 16 5 3 24 20 11 MEAN QFF PRESSURE IN HPA 1018.2 1016.3 1011.1 1008.7 1005.2 997.4 990.3 995.7 1004.4 1011.3 1016.2 1018.2 1007.7 MAX. QFF PRESSURE IN HPA 1025.3 1023.3 1022.2 1014.2 1011.2 1003.2 993.6 1003.3 1008.6 1013.8 1022.3 1027.1 1027.1 DAY 19 17 1 14 7 8 4 31 29 30 30 29 MIN. QFF PRESSURE IN HPA 1006.2 1006.8 1003.8 1003.0 999.0 990.9 985.8 991.0 1000.0 1009.0 1009.9 1010.8 985.8 DAY 17 23 25 11 5 20 16 1 2 4 20 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 814.7 814.6 812.3 813.9 814.9 811.9 808.7 811.5 815.6 817.9 817.0 815.6 814.0 MAX. QFE PRESSURE IN HPA 818.8 818.5 819.1 816.6 818.1 815.5 810.8 813.8 818.6 820.9 821.6 819.5 821.6 DAY 7 17 11 14 12 8 22 10 19 9 8 28 MIN. QFE PRESSURE IN HPA 804.8 810.1 807.3 810.5 810.7 807.4 804.8 808.7 812.8 814.6 813.2 811.7 804.8 DAY 17 10 25 11 5 30 16 4 2 24 20 10 MEAN QNH PRESSURE IN HPA 1016.9 1016.7 1014.0 1015.8 1017.0 1013.4 1009.7 1013.0 1018.0 1020.7 1019.5 1017.9 1016.1 MAX. QNH PRESSURE IN HPA 1021.8 1021.4 1022.1 1019.1 1020.9 1017.8 1012.2 1015.8 1021.5 1024.3 1025.1 1022.6 1025.1 DAY 7 17 11 14 12 8 22 10 19 9 8 28 MIN. QNH PRESSURE IN HPA 1005.0 1011.3 1008.0 1011.8 1012.1 1008.1 1005.0 1009.7 1014.6 1016.7 1015.1 1013.3 1005.0 DAY 17 10 25 11 5 30 16 4 2 24 20 10 MEAN QFF PRESSURE IN HPA 1015.9 1014.6 1009.2 1007.3 1003.7 996.2 988.9 993.6 1002.3 1009.3 1014.2 1015.8 1005.9 MAX. QFF PRESSURE IN HPA 1022.4 1020.7 1019.7 1013.1 1010.3 1002.2 993.0 1001.1 1007.0 1013.4 1019.8 1024.8 1024.8 DAY 19 8 1 14 7 8 4 31 30 31 30 29 MIN. QFF PRESSURE IN HPA 1002.3 1005.8 1001.5 1002.5 997.4 989.9 983.9 988.7 997.5 1006.3 1007.8 1008.7 983.9 DAY 17 23 25 10 5 30 16 1 3 14 13 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.3 813.3 810.8 812.3 813.5 810.5 807.4 810.1 814.0 816.3 815.7 814.4 812.6 MAX. QFE PRESSURE IN HPA 817.3 816.9 818.2 815.6 816.5 814.2 809.8 812.5 817.1 819.5 820.5 818.3 820.5 DAY 7 17 11 24 12 8 22 28 18 8 8 28 MIN. QFE PRESSURE IN HPA 803.9 809.3 806.3 809.7 809.6 805.6 803.7 807.2 811.0 813.6 812.1 810.0 803.7 DAY 17 10 17 10 5 19 16 5 2 24 20 10 MEAN QNH PRESSURE IN HPA 1015.1 1015.2 1012.2 1014.0 1015.4 1011.8 1008.1 1011.3 1016.1 1018.8 1018.1 1016.5 1014.4 MAX. QNH PRESSURE IN HPA 1020.0 1019.5 1021.0 1017.9 1019.0 1016.3 1011.0 1014.2 1019.7 1022.6 1023.8 1021.2 1023.8 DAY 7 17 11 24 12 8 22 28 18 8 8 28 MIN. QNH PRESSURE IN HPA 1003.9 1010.4 1006.8 1010.9 1010.7 1006.0 1003.7 1007.9 1012.4 1015.5 1013.7 1011.2 1003.7 DAY 17 10 17 10 5 19 16 5 2 24 20 10 MEAN QFF PRESSURE IN HPA 1014.4 1012.9 1007.4 1005.7 1002.8 995.2 988.2 992.8 1001.0 1007.8 1012.9 1014.2 1004.6 MAX. QFF PRESSURE IN HPA 1021.3 1019.1 1017.3 1012.3 1008.9 1001.6 991.7 1000.5 1005.2 1012.0 1017.6 1023.8 1023.8 DAY 19 17 1 14 11 8 4 31 29 31 30 29 MIN. QFF PRESSURE IN HPA 1001.9 1005.9 1000.1 1000.5 997.3 987.9 983.2 988.7 996.7 1004.8 1007.8 1006.9 983.2 DAY 17 23 25 28 5 30 16 1 2 14 13 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 813.8 813.8 811.3 812.6 813.7 810.2 807.3 810.2 814.1 816.7 816.4 815.2 812.9 MAX. QFE PRESSURE IN HPA 818.3 817.4 819.5 815.6 816.5 813.6 810.0 812.8 817.3 820.0 821.3 819.6 821.3 DAY 7 17 11 24 12 8 22 28 20 8 8 28 MIN. QFE PRESSURE IN HPA 804.8 810.6 807.4 810.2 811.2 805.0 803.7 807.2 811.0 815.0 813.0 811.0 803.7 DAY 17 10 29 10 4 19 16 5 2 23 13 10 MEAN QNH PRESSURE IN HPA 1015.8 1015.8 1012.7 1014.3 1015.6 1011.5 1008.0 1011.5 1016.1 1019.3 1018.8 1017.4 1014.7 MAX. QNH PRESSURE IN HPA 1021.2 1020.1 1022.6 1017.9 1019.0 1015.5 1011.2 1014.6 1020.0 1023.2 1024.8 1022.7 1024.8 DAY 7 17 11 24 12 8 22 28 20 8 8 28 MIN. QNH PRESSURE IN HPA 1005.0 1011.9 1008.1 1011.5 1012.7 1005.2 1003.7 1007.9 1012.4 1017.2 1014.8 1012.4 1003.7 DAY 17 10 29 10 4 19 16 5 2 23 13 10 MEAN QFF PRESSURE IN HPA 1017.0 1015.6 1009.4 1006.9 1003.5 994.9 988.4 994.0 1002.5 1010.1 1015.3 1017.1 1006.2 MAX. QFF PRESSURE IN HPA 1024.5 1025.2 1019.3 1014.0 1009.0 999.8 992.2 1000.8 1007.6 1014.0 1021.1 1026.7 1026.7 DAY 7 7 1 14 6 8 28 30 20 18 8 28 MIN. QFF PRESSURE IN HPA 1004.0 1008.7 1002.8 1001.3 998.5 988.1 983.2 989.1 998.1 1006.4 1010.1 1009.1 983.2 DAY 17 23 29 28 31 19 16 6 2 5 13 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 814.7 814.8 812.4 813.7 814.7 811.3 808.5 811.4 815.0 817.8 817.1 816.0 813.9 MAX. QFE PRESSURE IN HPA 818.7 818.0 819.7 816.8 817.1 814.4 810.9 814.0 817.8 820.8 821.3 821.3 821.3 DAY 7 7 11 14 28 7 22 21 20 8 8 28 MIN. QFE PRESSURE IN HPA 805.7 812.1 807.4 811.4 811.6 805.9 805.3 808.3 812.0 815.3 813.8 811.0 805.3 DAY 17 10 29 10 5 19 16 5 2 23 19 10 MEAN QNH PRESSURE IN HPA 1016.8 1017.0 1014.1 1015.7 1016.9 1012.8 1009.4 1012.9 1017.2 1020.5 1019.7 1018.4 1015.9 MAX. QNH PRESSURE IN HPA 1021.6 1020.8 1022.8 1019.4 1019.7 1016.5 1012.3 1016.0 1020.6 1024.2 1024.8 1024.8 1024.8 DAY 7 7 11 14 28 7 22 21 20 8 8 28 MIN. QNH PRESSURE IN HPA 1006.1 1013.7 1008.1 1012.9 1013.1 1006.3 1005.6 1009.2 1013.6 1017.6 1015.8 1012.4 1005.6 DAY 17 10 29 10 5 19 16 5 2 23 19 10 MEAN QFF PRESSURE IN HPA 1016.6 1015.3 1009.7 1007.0 1003.5 995.5 988.9 994.5 1002.2 1009.5 1014.7 1016.7 1006.2 MAX. QFF PRESSURE IN HPA 1024.4 1023.0 1018.8 1012.7 1009.4 1000.8 992.5 1001.6 1006.8 1013.1 1020.1 1027.8 1027.8 DAY 19 7 1 13 6 7 22 30 29 31 29 28 MIN. QFF PRESSURE IN HPA 1006.0 1008.1 1001.9 1000.9 997.1 987.8 984.1 989.0 998.1 1007.3 1009.4 1007.5 984.1 DAY 17 22 29 28 31 19 16 3 5 10 12 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 814.5 814.6 812.2 813.6 814.5 811.3 808.7 811.3 814.9 817.8 816.9 815.6 813.8 MAX. QFE PRESSURE IN HPA 818.7 817.7 819.2 816.6 816.9 814.6 811.1 813.9 817.9 820.8 821.6 820.6 821.6 DAY 7 7 11 13 11 7 22 16 18 8 8 28 MIN. QFE PRESSURE IN HPA 804.7 811.1 807.4 810.6 811.0 805.7 805.4 808.0 811.7 815.1 813.2 810.0 804.7 DAY 25 27 29 10 5 30 15 5 2 23 19 10 MEAN QNH PRESSURE IN HPA 1016.6 1016.7 1013.8 1015.5 1016.6 1012.7 1009.7 1012.7 1017.1 1020.5 1019.4 1018.0 1015.8 MAX. QNH PRESSURE IN HPA 1021.6 1020.4 1022.2 1019.1 1019.5 1016.7 1012.5 1015.9 1020.7 1024.2 1025.1 1023.9 1025.1 DAY 7 7 11 13 11 7 22 16 18 8 8 28 MIN. QNH PRESSURE IN HPA 1004.9 1012.5 1008.1 1011.9 1012.4 1006.1 1005.7 1008.8 1013.3 1017.3 1015.1 1011.2 1004.9 DAY 25 27 29 10 5 30 15 5 2 23 19 10 MEAN QFF PRESSURE IN HPA 1015.5 1014.7 1008.9 1006.7 1003.1 995.4 988.9 993.5 1001.5 1009.2 1014.1 1015.9 1005.6 MAX. QFF PRESSURE IN HPA 1023.0 1023.0 1017.1 1014.1 1010.0 1001.4 992.3 1001.2 1006.5 1015.3 1020.0 1027.6 1027.6 DAY 19 7 1 13 6 7 22 30 29 31 29 28 MIN. QFF PRESSURE IN HPA 1005.7 1006.7 1002.1 1000.1 996.8 987.5 984.8 988.7 995.7 1006.7 1008.2 1005.1 984.8 DAY 25 23 29 28 31 30 15 3 5 14 12 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.9 5.3 10.3 15.6 20.9 25.5 28.8 27.3 23.0 16.2 10.3 8.2 16.2 MINIMUN AIR TEMPERATURE (C) -3.4 -1.2 3.5 6.5 9.8 15.4 20.2 18.6 12.9 5.8 -0.0 -1.3 7.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 11 4 0 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 14 11 3 0 0 0 0 0 0 0 1 11 40 DAYS WITH FREEZING MIN.<= 0 24 17 10 1 0 0 0 0 0 1 16 20 89 TEMPERATURE RECORDS LOWEST(C) -11.4 -10.2 -6.4 0.0 4.0 9.6 16.0 11.0 7.0 0.0 -4.4 -8.0 -11.4 DAY 14 24 6 8 3 3 25 28 19 29 28 8 MAXIMUM AIR TEMPERATURE (C) 10.1 12.0 17.1 23.2 29.1 32.6 35.8 34.3 31.7 26.1 20.6 19.3 24.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 17 29 31 31 25 2 0 0 135 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.2 16.8 26.4 28.0 33.2 35.0 40.4 37.5 35.5 30.6 23.2 24.4 40.4 DAY 25 11 29 21 29 29 11 22 8 1 19 17 DIF. BETWEEN (MAX.-MIN.) (C) 13.5 13.2 13.6 16.7 19.3 17.2 15.6 15.7 18.8 20.3 20.6 20.6 17.1 MEAN DAILY TEMP. (MDT) (C) 3.4 5.4 10.3 14.8 19.4 24.0 28.0 26.5 22.3 15.9 10.3 9.0 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.1 91.4 216.9 169.1 49.8 2.3 0.0 0.0 537.7 HEATING DEG. DAYS(BASE 18 0C) 453.8 353.1 241.0 98.6 20.3 0.0 0.0 0.0 0.0 77.1 231.4 279.0 1754.3 DEWPOINT (MEAN C) -4.6 -4.2 -1.1 -1.4 -1.9 -2.0 3.7 0.6 -2.5 -6.6 -9.4 -10.8 -3.3 MIXING RATIO (G/KG) 3.56 3.80 4.79 4.62 4.23 4.17 6.32 5.23 4.20 2.99 2.39 2.27 4.05 VAPOUR PRESSURE (HPA) 4.63 4.94 6.22 6.00 5.50 5.41 8.14 6.76 5.46 3.90 3.13 2.98 5.26 SATURATION DEF. (HPA) 3.38 4.54 7.26 12.95 20.98 28.72 33.08 31.00 24.51 16.31 10.73 9.27 16.90 RELATIVE HUMIDITY (MEAN %) 63 56 52 38 25 18 22 20 21 23 27 29 33 RELATIVE HUMIDITY (MAX. %) 88 84 83 64 44 29 34 31 35 38 43 47 52 RELATIVE HUMIDITY (MIN. %) 34 30 27 17 11 10 13 11 11 11 13 14 17 RELATIVE HUMIDITY (MEAN% 03UTC) 84 80 76 60 40 27 31 30 34 37 43 45 49 RELATIVE HUMIDITY (MEAN% 09UTC) 45 37 32 21 13 11 15 13 13 13 15 17 20 RELATIVE HUMIDITY (MEAN% 15UTC) 47 43 37 27 15 12 16 14 13 17 20 23 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.0 47.1 21.8 5.1 0.0 0.0 0.4 1.6 0.0 0.0 0.0 0.0 115.0 DAYS WITH PRECIPITATION >=10 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 3 2 2 0 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 1 4 4 6 2 0 0 0 1 0 0 0 0 17 DAYS WITH PRECIPITATION 6 7 10 2 0 0 1 2 0 0 0 0 28 GREATEST DAILY PRECIPITATION 21.0 33.0 6.4 3.5 0.0 0.0 0.4 1.0 0.0 0.0 0.0 0.0 33.0 DAY 2 12 10 23 ** ** 29 7 ** ** ** ** DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 0 4 2 1 0 1 0 0 0 0 0 8 WIND DIRECTION (PREVAILING) 225 225 225 225 270 360 360 360 360 360 45 45 360 PREVAILING WIND SPEED(KNOTS) 9.8 9.8 11.5 11.3 10.9 10.5 12.2 11.5 9.6 12.2 7.1 6.8 11.5 PREVAILING WIND PERCENT 10.1 17.9 19.8 16.7 17.7 26.7 29.0 30.6 9.2 8.5 6.3 4.8 11.1 CALMS PERCENT OF WIND 49.6 44.2 47.6 41.3 45.2 36.3 29.4 25.0 56.3 70.6 80.8 83.5 50.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 181 244 228 270 288 360 16 18 353 334 33 144 324 VECTOR WIND MAGNITUDE(KNOTS) 1.4 1.4 3.5 2.8 2.5 3.7 3.9 4.2 0.6 0.8 0.3 0.2 0.9 WIND STEADINESES (MEAN %) 33.3 24.6 63.6 47.5 46.3 62.7 55.7 56.8 16.7 30.8 21.4 16.7 19.1 WIND SPEED (MEAN KNOTS) 4.2 5.7 5.5 5.9 5.4 5.9 7.0 7.4 3.6 2.6 1.4 1.2 4.7 FASTEST WIND DIRECTION 220 360 260 220 270 360 360 30 360 360 180 250 220 FASTEST WIND SPEED (KNOTS) 29 29 27 27 29 19 23 23 19 19 14 10 29 DAY 13 22 15 5 15 8 13 30 12 13 1 4 DAYS WITH SKY CLEAR (0-2)/8 18 17 10 15 25 28 25 29 30 31 28 23 279 DAYS WITH P.CLOUDY (3-6)/8 9 6 14 12 6 2 6 2 0 0 2 7 66 DAYS WITH CLOUDY (7-8)/8 4 5 7 3 0 0 0 0 0 0 0 1 20 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS 225.5 218.7 209.2 271.1 356.1 361.4 335.4 335.2 317.6 324.4 289.5 259.5 3503.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 813.7 814.0 814.2 814.7 814.6 812.7 810.0 812.6 814.2 817.2 818.5 819.4 814.7 MAX. QFE PRESSURE IN HPA 821.0 821.0 821.2 822.7 820.5 817.7 815.0 816.7 818.8 821.9 824.0 826.0 826.0 DAY-HOUR 4- 6 24- 6 27- 6 12- 6 8- 6 5- 6 22- 6 29- 6 26- 6 29- 6 21- 6 10- 6 MIN. QFE PRESSURE IN HPA 801.8 804.9 806.0 809.4 808.0 807.9 803.8 808.5 810.2 812.9 814.0 813.7 801.8 DAY-HOUR 13-12 16-12 2- 0 6-12 30-12 29-15 8-15 22-12 16-12 3-12 1-12 21-12 MEAN QNH PRESSURE IN HPA 1015.7 1016.1 1016.3 1016.9 1016.7 1014.5 1011.2 1014.3 1016.3 1019.9 1021.4 1022.5 1016.8 MAX. QNH PRESSURE IN HPA 1024.4 1024.4 1024.6 1026.4 1023.8 1020.4 1017.2 1019.2 1021.8 1025.5 1028.0 1030.4 1030.4 DAY-HOUR 4- 6 24- 6 27- 6 12- 6 8- 6 5- 6 22- 6 29- 6 26- 6 29- 6 21- 6 10- 6 MIN. QNH PRESSURE IN HPA 1001.4 1005.1 1006.4 1010.5 1008.8 1008.7 1003.8 1009.4 1011.5 1014.7 1016.0 1015.7 1001.4 DAY-HOUR 13-12 16-12 2- 0 6-12 30-12 29-15 8-15 22-12 16-12 3-12 1-12 21-12 MEAN QFF PRESSURE IN HPA 1015.3 1014.0 1010.1 1006.9 1003.0 997.5 991.7 995.9 1001.0 1009.7 1015.7 1018.5 1006.6 MAX. QFF PRESSURE IN HPA 1024.7 1029.3 1019.2 1018.1 1012.1 1002.8 1000.6 1003.1 1008.2 1019.8 1023.7 1031.1 1031.1 DAY-HOUR 15- 3 24- 3 6- 3 12- 6 3- 6 20- 3 22- 6 28- 3 26- 3 29- 3 21- 3 9- 3 MIN. QFF PRESSURE IN HPA 1001.5 1001.4 998.6 997.0 993.7 989.2 983.1 988.3 995.1 999.2 1008.3 1009.6 983.1 DAY-HOUR 13-12 16-12 15-12 21-12 30-15 30-12 8-18 22-12 8-12 1-12 1-12 18-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 813.6 813.8 813.7 814.3 814.3 812.4 809.8 812.3 814.0 817.0 818.2 819.3 814.4 MAX. QFE PRESSURE IN HPA 819.7 819.6 819.8 820.3 818.6 815.6 813.6 814.9 816.9 820.2 822.0 824.3 824.3 DAY 5 24 28 12 8 7 22 29 26 26 21 10 MIN. QFE PRESSURE IN HPA 806.6 806.0 806.0 809.6 809.7 808.8 805.3 809.8 811.6 813.6 815.4 814.8 805.3 DAY 13 16 2 6 31 30 9 5 16 4 17 21 MEAN QNH PRESSURE IN HPA 1015.5 1015.8 1015.7 1016.4 1016.4 1014.1 1011.0 1014.0 1016.1 1019.6 1021.0 1022.3 1016.5 MAX. QNH PRESSURE IN HPA 1022.8 1022.7 1023.0 1023.6 1021.5 1017.9 1015.5 1017.1 1019.5 1023.4 1025.6 1028.3 1028.3 DAY 5 24 28 12 8 7 22 29 26 26 21 10 MIN. QNH PRESSURE IN HPA 1007.2 1006.4 1006.4 1010.7 1010.9 1009.8 1005.6 1011.0 1013.1 1015.5 1017.7 1017.0 1005.6 DAY 13 16 2 6 31 30 9 5 16 4 17 21 MEAN QFF PRESSURE IN HPA 1014.4 1013.3 1009.2 1006.4 1003.2 997.5 991.7 995.6 1000.7 1009.0 1014.7 1017.2 1006.1 MAX. QFF PRESSURE IN HPA 1022.4 1027.3 1016.4 1015.4 1009.0 1001.1 998.7 1000.3 1005.1 1015.8 1020.5 1026.2 1027.3 DAY 15 24 12 12 7 20 22 29 19 29 21 10 MIN. QFF PRESSURE IN HPA 1003.8 1003.3 1000.2 997.6 996.3 990.5 985.0 990.1 997.1 1001.0 1009.5 1011.3 985.0 DAY 13 12 2 23 30 30 11 22 5 1 2 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 813.9 814.3 814.5 815.2 815.4 813.6 810.8 813.4 815.1 817.9 819.0 819.8 815.2 MAX. QFE PRESSURE IN HPA 819.3 819.9 819.8 821.2 819.7 816.9 814.5 816.3 818.1 820.7 822.6 825.0 825.0 DAY 4 24 28 12 8 5 22 29 26 26 21 10 MIN. QFE PRESSURE IN HPA 804.6 806.3 808.2 809.6 810.9 810.1 805.9 810.7 812.4 814.5 816.4 815.1 804.6 DAY 13 16 2 6 31 30 8 5 16 4 2 21 MEAN QNH PRESSURE IN HPA 1016.0 1016.4 1016.6 1017.5 1017.7 1015.5 1012.2 1015.3 1017.3 1020.6 1022.0 1023.0 1017.5 MAX. QNH PRESSURE IN HPA 1022.4 1023.1 1023.0 1024.6 1022.8 1019.5 1016.6 1018.8 1020.9 1024.0 1026.3 1029.2 1029.2 DAY 4 24 28 12 8 5 22 29 26 26 21 10 MIN. QNH PRESSURE IN HPA 1004.8 1006.8 1009.1 1010.7 1012.3 1011.3 1006.3 1012.1 1014.1 1016.6 1018.9 1017.3 1004.8 DAY 13 16 2 6 31 30 8 5 16 4 2 21 MEAN QFF PRESSURE IN HPA 1016.6 1015.4 1011.4 1008.5 1004.3 998.9 993.4 997.9 1003.5 1012.3 1018.5 1021.4 1008.5 MAX. QFF PRESSURE IN HPA 1024.7 1029.3 1019.2 1017.4 1011.0 1002.8 1000.5 1003.1 1008.2 1019.8 1023.7 1031.1 1031.1 DAY 15 24 6 12 3 20 22 28 26 29 21 9 MIN. QFF PRESSURE IN HPA 1002.7 1005.8 1001.1 1002.3 997.2 993.2 986.1 992.2 998.0 1003.7 1013.1 1015.3 986.1 DAY 13 16 30 23 30 30 8 22 4 1 2 2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.1 815.4 815.6 816.0 816.1 814.1 811.3 814.0 815.9 818.9 820.1 821.0 816.1 MAX. QFE PRESSURE IN HPA 821.0 821.0 821.2 822.7 820.5 817.7 815.0 816.7 818.8 821.9 824.0 826.0 826.0 DAY 4 24 27 12 8 5 22 29 26 29 21 10 MIN. QFE PRESSURE IN HPA 804.1 807.4 809.1 810.6 810.9 810.3 806.8 811.4 813.1 815.7 817.8 816.3 804.1 DAY 13 13 2 6 30 30 8 13 16 4 17 21 MEAN QNH PRESSURE IN HPA 1017.3 1017.7 1017.9 1018.5 1018.5 1016.1 1012.8 1016.0 1018.2 1021.8 1023.3 1024.4 1018.6 MAX. QNH PRESSURE IN HPA 1024.4 1024.4 1024.6 1026.4 1023.8 1020.4 1017.2 1019.2 1021.8 1025.5 1028.0 1030.4 1030.4 DAY 4 24 27 12 8 5 22 29 26 29 21 10 MIN. QNH PRESSURE IN HPA 1004.2 1008.1 1010.2 1011.9 1012.3 1011.6 1007.4 1012.9 1014.9 1018.1 1020.6 1018.8 1004.2 DAY 13 13 2 6 30 30 8 13 16 4 17 21 MEAN QFF PRESSURE IN HPA 1017.3 1015.7 1011.7 1007.8 1004.3 998.8 993.1 997.4 1002.5 1011.1 1017.1 1020.3 1008.1 MAX. QFF PRESSURE IN HPA 1024.2 1027.0 1017.7 1018.1 1012.1 1002.6 1000.6 1001.3 1007.3 1017.4 1023.5 1029.2 1029.2 DAY 22 24 5 12 3 17 22 28 25 29 21 9 MIN. QFF PRESSURE IN HPA 1003.6 1006.3 1002.7 1001.6 996.1 992.5 985.3 993.1 997.9 1003.0 1013.1 1014.2 985.3 DAY 13 16 15 24 30 30 8 22 11 1 1 2 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 813.8 814.3 814.5 815.0 814.9 813.1 810.2 812.8 814.6 817.4 818.7 819.4 814.9 MAX. QFE PRESSURE IN HPA 820.2 819.7 820.4 821.6 819.6 816.5 814.0 815.1 817.5 820.6 822.4 824.0 824.0 DAY 4 23 27 12 8 5 22 29 13 25 21 10 MIN. QFE PRESSURE IN HPA 802.5 806.1 808.0 810.3 808.9 809.0 805.5 810.3 811.3 814.4 816.0 814.9 802.5 DAY 13 13 2 24 30 30 8 22 3 4 1 21 MEAN QNH PRESSURE IN HPA 1015.7 1016.4 1016.6 1017.2 1017.1 1014.9 1011.5 1014.6 1016.7 1020.1 1021.6 1022.5 1017.1 MAX. QNH PRESSURE IN HPA 1023.4 1022.8 1023.7 1025.1 1022.7 1019.0 1016.0 1017.3 1020.2 1023.9 1026.1 1028.0 1028.0 DAY 4 23 27 12 8 5 22 29 13 25 21 10 MIN. QNH PRESSURE IN HPA 1002.2 1006.6 1008.8 1011.6 1009.9 1010.0 1005.8 1011.6 1012.8 1016.5 1018.4 1017.1 1002.2 DAY 13 13 2 24 30 30 8 22 3 4 1 21 MEAN QFF PRESSURE IN HPA 1014.8 1013.7 1010.0 1006.9 1003.3 997.8 991.6 995.7 1000.5 1008.9 1014.8 1017.2 1006.3 MAX. QFF PRESSURE IN HPA 1021.6 1025.3 1017.4 1016.2 1010.2 1001.7 999.0 999.5 1005.9 1015.6 1020.3 1026.2 1026.2 DAY 22 23 6 12 8 17 22 29 25 29 21 9 MIN. QFF PRESSURE IN HPA 1004.1 1004.1 1000.6 998.6 994.2 991.5 984.2 990.3 995.9 1000.9 1010.6 1011.8 984.2 DAY 13 16 15 21 30 30 11 22 11 1 1 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 812.4 812.7 813.1 813.6 813.5 811.9 808.8 811.4 813.0 815.9 817.3 818.1 813.5 MAX. QFE PRESSURE IN HPA 819.0 818.2 819.6 819.3 818.3 815.8 812.3 813.9 815.5 819.4 821.2 822.7 822.7 DAY 4 23 27 12 8 6 22 19 13 25 21 10 MIN. QFE PRESSURE IN HPA 801.8 804.9 806.4 809.4 808.0 808.0 804.2 808.5 810.2 812.9 814.0 813.7 801.8 DAY 13 16 15 6 30 30 8 22 16 3 1 21 MEAN QNH PRESSURE IN HPA 1014.1 1014.5 1014.9 1015.5 1015.4 1013.5 1009.8 1012.9 1014.8 1018.3 1019.9 1020.9 1015.4 MAX. QNH PRESSURE IN HPA 1022.0 1021.0 1022.7 1022.4 1021.2 1018.2 1014.0 1015.9 1017.8 1022.5 1024.6 1026.4 1026.4 DAY 4 23 27 12 8 6 22 19 13 25 21 10 MIN. QNH PRESSURE IN HPA 1001.4 1005.1 1006.9 1010.5 1008.8 1008.8 1004.3 1009.4 1011.5 1014.7 1016.0 1015.7 1001.4 DAY 13 16 15 6 30 30 8 22 16 3 1 21 MEAN QFF PRESSURE IN HPA 1013.1 1011.9 1008.4 1005.7 1002.3 996.9 990.5 994.6 999.4 1007.7 1013.6 1015.8 1005.0 MAX. QFF PRESSURE IN HPA 1020.9 1023.1 1014.5 1013.9 1008.4 1000.9 997.5 998.8 1003.8 1013.9 1019.6 1024.0 1024.0 DAY 14 23 5 11 3 19 23 29 25 25 21 9 MIN. QFF PRESSURE IN HPA 1001.5 1001.4 998.6 997.0 993.9 989.2 983.5 988.3 995.1 999.2 1008.3 1009.6 983.5 DAY 13 16 15 21 30 30 8 22 8 1 1 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 813.2 813.4 813.4 814.0 813.6 811.7 808.8 811.5 813.1 816.3 817.8 818.8 813.8 MAX. QFE PRESSURE IN HPA 820.1 818.8 819.9 819.3 818.8 815.8 812.6 814.0 816.0 819.6 821.7 823.5 823.5 DAY 4 23 27 12 8 6 21 29 26 25 21 10 MIN. QFE PRESSURE IN HPA 804.7 806.0 806.4 810.0 808.0 807.9 803.8 808.5 810.2 812.9 814.6 814.9 803.8 DAY 13 13 15 21 30 29 8 22 16 3 1 21 MEAN QNH PRESSURE IN HPA 1015.0 1015.3 1015.3 1016.0 1015.5 1013.3 1009.7 1013.0 1015.0 1018.7 1020.6 1021.7 1015.8 MAX. QNH PRESSURE IN HPA 1023.3 1021.8 1023.1 1022.4 1021.8 1018.2 1014.3 1016.0 1018.4 1022.7 1025.2 1027.4 1027.4 DAY 4 23 27 12 8 6 21 29 26 25 21 10 MIN. QNH PRESSURE IN HPA 1004.9 1006.4 1006.9 1011.2 1008.8 1008.7 1003.8 1009.4 1011.5 1014.7 1016.7 1017.1 1003.8 DAY 13 13 15 21 30 29 8 22 16 3 1 21 MEAN QFF PRESSURE IN HPA 1015.7 1014.2 1010.2 1007.0 1002.2 996.7 990.9 995.6 1001.2 1010.4 1017.1 1020.1 1006.8 MAX. QFF PRESSURE IN HPA 1023.3 1025.7 1016.6 1014.7 1009.4 1001.5 998.5 1001.1 1006.6 1016.9 1022.7 1029.4 1029.4 DAY 14 23 5 12 7 19 21 28 19 29 21 9 MIN. QFF PRESSURE IN HPA 1006.5 1004.7 1000.2 999.1 993.7 991.0 983.4 989.5 995.7 1001.6 1012.5 1014.2 983.4 DAY 13 16 15 21 30 29 7 22 8 1 1 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 814.1 814.2 814.6 815.1 814.6 812.6 810.0 812.5 814.2 817.3 818.7 819.6 814.8 MAX. QFE PRESSURE IN HPA 820.5 819.6 820.6 820.3 819.2 816.0 814.2 815.1 817.3 820.2 822.0 824.8 824.8 DAY 4 23 26 11 8 6 22 29 26 25 20 9 MIN. QFE PRESSURE IN HPA 806.7 807.2 807.3 811.4 809.7 808.8 804.9 809.5 811.4 814.0 816.0 815.7 804.9 DAY 13 15 1 8 30 29 8 22 3 3 1 20 MEAN QNH PRESSURE IN HPA 1016.1 1016.3 1016.7 1017.3 1016.8 1014.4 1011.3 1014.3 1016.2 1020.0 1021.6 1022.7 1017.0 MAX. QNH PRESSURE IN HPA 1023.8 1022.7 1023.9 1023.6 1022.2 1018.4 1016.3 1017.3 1020.0 1023.4 1025.6 1028.9 1028.9 DAY 4 23 26 11 8 6 22 29 26 25 20 9 MIN. QNH PRESSURE IN HPA 1007.3 1007.9 1008.0 1012.9 1010.9 1009.8 1005.1 1010.6 1012.9 1016.0 1018.4 1018.1 1005.1 DAY 13 15 1 8 30 29 8 22 3 3 1 20 MEAN QFF PRESSURE IN HPA 1016.1 1014.1 1010.4 1006.5 1002.4 996.9 991.5 995.7 1000.6 1009.4 1015.4 1018.6 1006.5 MAX. QFF PRESSURE IN HPA 1024.0 1025.2 1016.7 1015.0 1009.2 1000.6 999.5 999.7 1005.2 1014.7 1020.4 1028.9 1028.9 DAY 14 23 5 11 3 17 21 31 26 25 20 9 MIN. QFF PRESSURE IN HPA 1009.9 1006.0 1001.7 999.0 994.4 990.5 983.1 990.5 995.5 1001.9 1011.7 1013.7 983.1 DAY 9 12 1 21 30 30 8 22 8 1 16 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 813.8 814.2 814.5 814.7 814.5 812.6 810.0 812.5 814.1 817.2 818.5 819.4 814.7 MAX. QFE PRESSURE IN HPA 820.0 819.6 820.6 820.3 819.0 816.0 813.8 814.9 816.8 820.2 822.0 824.8 824.8 DAY 4 23 27 11 8 6 21 28 26 25 20 9 MIN. QFE PRESSURE IN HPA 807.4 806.3 807.3 811.0 809.7 808.8 805.9 809.5 811.4 813.6 816.0 815.4 805.9 DAY 13 15 1 5 30 29 8 22 3 3 16 20 MEAN QNH PRESSURE IN HPA 1015.8 1016.3 1016.6 1016.9 1016.6 1014.3 1011.2 1014.2 1016.2 1019.8 1021.4 1022.5 1016.8 MAX. QNH PRESSURE IN HPA 1023.2 1022.7 1023.9 1023.6 1022.0 1018.4 1015.8 1017.1 1019.4 1023.4 1025.6 1028.9 1028.9 DAY 4 23 27 11 8 6 21 28 26 25 20 9 MIN. QNH PRESSURE IN HPA 1008.1 1006.8 1008.0 1012.4 1010.9 1009.8 1006.3 1010.6 1012.9 1015.5 1018.4 1017.7 1006.3 DAY 13 15 1 5 30 29 8 22 3 3 16 20 MEAN QFF PRESSURE IN HPA 1014.9 1013.5 1009.8 1006.4 1002.5 997.0 991.3 995.3 1000.1 1008.8 1014.5 1017.3 1005.9 MAX. QFF PRESSURE IN HPA 1023.3 1025.1 1016.9 1015.0 1009.0 1001.0 998.9 999.2 1004.3 1015.3 1020.3 1027.5 1027.5 DAY 14 23 5 11 7 19 21 28 19 28 20 9 MIN. QFF PRESSURE IN HPA 1008.5 1003.9 1000.9 999.0 995.1 990.6 983.9 989.2 995.9 1001.6 1010.7 1012.1 983.9 DAY 12 15 1 21 30 30 11 22 4 3 16 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.9 7.2 9.0 16.0 21.7 27.1 28.2 26.3 23.1 16.4 10.1 4.7 16.1 MINIMUN AIR TEMPERATURE (C) -2.3 1.1 2.1 6.6 10.8 16.3 19.6 16.5 13.1 6.2 1.3 -5.1 7.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 14 0 0 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 10 2 1 0 0 0 0 0 0 0 2 20 35 DAYS WITH FREEZING MIN.<= 0 19 11 11 0 0 0 0 0 0 0 11 28 80 TEMPERATURE RECORDS LOWEST(C) -16.4 -7.6 -5.6 1.0 7.0 11.0 14.0 11.4 7.0 1.4 -6.2 -11.0 -16.4 DAY 5 1 8 16 5 1 22 27 30 24 30 19 MAXIMUM AIR TEMPERATURE (C) 10.8 13.9 15.9 24.0 30.0 35.2 35.2 33.5 31.8 25.9 18.9 15.6 24.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 18 30 31 31 25 0 0 0 135 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.0 18.4 24.2 28.6 33.0 37.4 38.4 35.0 34.6 28.0 22.5 21.0 38.4 DAY 1 8 26 30 31 30 9 15 2 6 8 26 DIF. BETWEEN (MAX.-MIN.) (C) 13.1 12.8 13.8 17.4 19.2 18.9 15.6 17.0 18.7 19.7 17.6 20.7 17.0 MEAN DAILY TEMP. (MDT) (C) 4.2 7.5 9.0 15.3 20.4 25.8 27.4 25.0 22.5 16.1 10.1 5.3 15.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 12.1 143.5 198.8 124.7 55.7 0.0 0.0 0.0 535.0 HEATING DEG. DAYS(BASE 18 0C) 426.6 294.5 279.3 84.8 1.8 0.0 0.0 0.0 1.2 59.5 237.2 394.9 1779.8 DEWPOINT (MEAN C) -5.6 -1.1 -4.4 -2.8 -3.6 -2.7 2.6 -2.4 -2.6 -6.0 -4.9 -11.8 -3.8 MIXING RATIO (G/KG) 3.39 4.70 3.70 4.05 3.70 3.97 5.94 4.06 4.05 3.07 3.45 2.10 3.85 VAPOUR PRESSURE (HPA) 4.41 6.10 4.80 5.27 4.81 5.14 7.64 5.26 5.26 4.01 4.50 2.75 5.00 SATURATION DEF. (HPA) 4.23 4.52 7.53 14.18 22.78 32.68 32.19 30.34 24.94 16.27 8.92 6.94 17.13 RELATIVE HUMIDITY (MEAN %) 56 62 46 32 21 16 21 16 20 23 38 34 32 RELATIVE HUMIDITY (MAX. %) 79 88 74 55 37 27 33 26 34 36 61 53 50 RELATIVE HUMIDITY (MIN. %) 31 35 24 14 10 8 13 9 11 13 20 16 17 RELATIVE HUMIDITY (MEAN% 03UTC) 74 83 71 53 36 26 32 26 34 36 59 50 48 RELATIVE HUMIDITY (MEAN% 09UTC) 42 45 32 17 12 9 15 10 13 14 24 19 21 RELATIVE HUMIDITY (MEAN% 15UTC) 44 48 32 21 12 10 16 12 14 18 29 29 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.2 102.5 40.3 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.4 1.0 175.7 DAYS WITH PRECIPITATION >=10 1 4 2 0 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 5 2 5 2 0 0 0 0 0 0 0 0 0 9 DAYS WITH PRECIPITATION >= 1 2 9 4 0 0 0 0 0 0 0 0 1 16 DAYS WITH PRECIPITATION 7 11 5 0 0 0 0 1 0 0 2 1 27 GREATEST DAILY PRECIPITATION 24.2 33.0 24.0 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.2 1.0 33.0 DAY 18 6 2 ** ** ** ** 17 ** ** 2 12 DAY WITH THUNDER STORM 0 0 0 1 0 0 1 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 1 3 1 0 3 0 0 0 1 0 9 WIND DIRECTION (PREVAILING) 225 180 225 270 360 270 360 360 45 45 225 45 360 PREVAILING WIND SPEED(KNOTS) 9.1 8.6 10.3 10.2 12.0 8.5 15.4 11.3 7.9 7.3 10.4 6.7 11.2 PREVAILING WIND PERCENT 6.0 11.2 15.7 16.7 16.1 15.4 15.3 35.9 15.4 10.9 14.2 8.5 9.7 CALMS PERCENT OF WIND 74.6 59.4 54.0 52.9 52.0 46.3 37.1 30.2 46.3 54.8 56.7 65.7 52.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 247 210 246 260 333 270 20 5 10 317 236 63 306 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.5 1.6 3.2 2.1 1.4 2.3 5.0 0.7 0.9 1.7 0.2 0.9 WIND STEADINESES (MEAN %) 34.8 44.1 34.8 64.0 43.7 32.6 35.4 73.5 16.3 25.7 43.6 8.3 20.9 WIND SPEED (MEAN KNOTS) 2.3 3.4 4.6 5.0 4.8 4.3 6.5 6.8 4.3 3.5 3.9 2.4 4.3 FASTEST WIND DIRECTION 270 220 360 320 20 20 360 10 30 300 220 260 320 FASTEST WIND SPEED (KNOTS) 19 19 23 35 27 19 35 31 23 19 29 16 35 DAY 21 6 5 26 30 8 26 26 28 25 12 3 DAYS WITH SKY CLEAR (0-2)/8 12 13 13 21 29 30 24 29 30 31 20 25 277 DAYS WITH P.CLOUDY (3-6)/8 11 8 13 8 2 0 7 2 0 0 10 5 66 DAYS WITH CLOUDY (7-8)/8 8 7 5 1 0 0 0 0 0 0 0 1 22 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS 175.0 182.8 238.5 283.0 374.1 361.0 320.0 355.5 320.3 322.1 243.5 264.3 3440.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.8 815.2 812.7 814.4 813.1 811.3 809.1 812.0 813.3 817.0 816.8 818.6 814.0 MAX. QFE PRESSURE IN HPA 820.0 820.7 819.0 818.3 818.9 818.2 812.6 818.0 819.5 820.7 822.1 824.6 824.6 DAY-HOUR 12- 6 12- 6 31- 6 4- 6 28- 6 1- 6 19- 6 20- 6 30- 6 11- 6 15- 6 6- 6 MIN. QFE PRESSURE IN HPA 807.6 806.4 806.7 809.6 806.7 804.6 804.0 807.8 809.2 813.7 811.6 813.6 804.0 DAY-HOUR 18-12 6- 0 2-15 9- 0 21-12 24-12 12-12 6-12 16-15 8-12 12-12 15-12 MEAN QNH PRESSURE IN HPA 1017.0 1017.4 1014.4 1016.5 1015.0 1012.7 1010.2 1013.6 1015.2 1019.6 1019.3 1021.5 1016.0 MAX. QNH PRESSURE IN HPA 1023.2 1024.0 1022.0 1021.2 1021.9 1021.0 1014.3 1020.8 1022.6 1024.0 1025.7 1028.7 1028.7 DAY-HOUR 12- 6 12- 6 31- 6 4- 6 28- 6 1- 6 19- 6 20- 6 30- 6 11- 6 15- 6 6- 6 MIN. QNH PRESSURE IN HPA 1008.4 1006.9 1007.3 1010.7 1007.3 1004.8 1004.0 1008.6 1010.3 1015.7 1013.1 1015.5 1004.0 DAY-HOUR 18-12 6- 0 2-15 9- 0 21-12 24-12 12-12 6-12 16-15 8-12 12-12 15-12 MEAN QFF PRESSURE IN HPA 1016.0 1013.7 1009.4 1006.3 1000.7 994.7 991.1 996.2 999.9 1009.3 1013.5 1020.3 1005.9 MAX. QFF PRESSURE IN HPA 1028.6 1020.9 1019.3 1014.2 1006.4 1004.8 997.7 1003.5 1012.5 1015.1 1024.1 1030.5 1030.5 DAY-HOUR 5- 3 7-15 19- 6 11- 3 28- 3 1- 3 31- 3 20- 3 30- 3 17- 3 14-15 6- 3 MIN. QFF PRESSURE IN HPA 1003.9 1002.5 1002.6 996.5 991.9 986.2 984.8 989.6 994.6 1002.4 1003.8 1009.6 984.8 DAY-HOUR 18-12 6- 0 2-15 9- 0 20-15 24-15 12-12 6-12 1-12 8-12 12-12 27-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 814.6 814.8 812.3 814.1 812.8 811.0 809.0 811.8 813.1 816.8 816.5 818.5 813.8 MAX. QFE PRESSURE IN HPA 819.1 818.1 816.7 817.0 817.4 816.0 811.0 815.9 817.5 819.2 820.4 822.5 822.5 DAY 3 13 31 5 28 1 1 19 30 11 15 6 MIN. QFE PRESSURE IN HPA 808.9 806.4 806.8 809.6 808.2 806.4 806.0 808.5 810.5 815.0 813.0 814.7 806.0 DAY 19 6 3 9 21 24 12 7 16 25 12 16 MEAN QNH PRESSURE IN HPA 1016.8 1017.0 1013.9 1016.1 1014.6 1012.4 1010.0 1013.3 1014.9 1019.4 1019.1 1021.4 1015.7 MAX. QNH PRESSURE IN HPA 1022.1 1020.9 1019.2 1019.6 1020.1 1018.4 1012.4 1018.3 1020.2 1022.2 1023.7 1026.2 1026.2 DAY 3 13 31 5 28 1 1 19 30 11 15 6 MIN. QNH PRESSURE IN HPA 1009.9 1006.9 1007.4 1010.7 1009.1 1006.9 1006.4 1009.4 1011.8 1017.2 1014.8 1016.9 1006.4 DAY 19 6 3 9 21 24 12 7 16 25 12 16 MEAN QFF PRESSURE IN HPA 1015.0 1012.8 1008.7 1005.9 1000.7 994.8 991.0 995.8 999.6 1008.8 1012.8 1019.1 1005.4 MAX. QFF PRESSURE IN HPA 1025.0 1017.6 1016.1 1010.7 1005.3 1002.5 996.2 1001.3 1008.5 1011.8 1019.9 1026.5 1026.5 DAY 3 2 8 1 28 1 14 19 30 29 15 6 MIN. QFF PRESSURE IN HPA 1006.8 1002.5 1003.4 996.5 994.2 988.4 986.1 990.7 994.6 1004.7 1006.2 1010.5 986.1 DAY 18 6 2 9 22 24 12 7 1 8 12 27 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 814.9 815.4 813.0 815.0 814.0 812.3 810.0 812.9 814.1 817.7 817.2 819.1 814.6 MAX. QFE PRESSURE IN HPA 818.8 818.9 817.7 817.0 818.6 817.5 811.9 816.9 818.5 820.2 820.6 823.4 823.4 DAY 3 12 31 1 28 1 19 19 30 11 15 6 MIN. QFE PRESSURE IN HPA 809.3 806.4 807.6 811.5 810.2 807.1 806.6 809.7 811.7 815.8 813.0 815.1 806.4 DAY 19 6 3 9 21 24 12 7 16 31 12 16 MEAN QNH PRESSURE IN HPA 1017.1 1017.7 1014.8 1017.2 1016.0 1013.9 1011.2 1014.7 1016.1 1020.5 1019.8 1022.1 1016.8 MAX. QNH PRESSURE IN HPA 1021.8 1021.9 1020.4 1019.6 1021.5 1020.2 1013.5 1019.5 1021.4 1023.4 1023.9 1027.3 1027.3 DAY 3 12 31 1 28 1 19 19 30 11 15 6 MIN. QNH PRESSURE IN HPA 1010.4 1006.9 1008.4 1013.0 1011.5 1007.8 1007.2 1010.9 1013.3 1018.2 1014.8 1017.3 1006.9 DAY 19 6 3 9 21 24 12 7 16 31 12 16 MEAN QFF PRESSURE IN HPA 1017.0 1014.9 1010.9 1008.0 1002.4 996.3 992.8 998.3 1002.1 1012.0 1015.8 1023.2 1007.8 MAX. QFF PRESSURE IN HPA 1028.6 1020.7 1018.2 1014.2 1006.4 1004.8 997.7 1003.5 1012.5 1015.1 1022.7 1030.5 1030.5 DAY 5 1 8 11 28 1 31 20 30 17 15 6 MIN. QFF PRESSURE IN HPA 1006.7 1002.5 1002.8 1001.1 996.0 989.0 988.7 993.1 996.8 1008.6 1007.5 1014.0 988.7 DAY 18 6 2 9 20 24 12 7 1 8 12 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.2 816.7 814.1 816.0 814.7 812.9 810.6 813.5 815.0 818.8 818.3 820.2 815.6 MAX. QFE PRESSURE IN HPA 820.0 820.7 819.0 818.3 818.9 818.2 812.6 818.0 819.5 820.7 822.1 824.6 824.6 DAY 12 12 31 4 28 1 19 20 30 11 15 6 MIN. QFE PRESSURE IN HPA 810.4 808.8 808.5 812.1 810.5 807.8 807.0 810.0 812.3 817.2 814.2 816.3 807.0 DAY 18 6 3 9 21 24 12 7 16 8 12 15 MEAN QNH PRESSURE IN HPA 1018.6 1019.2 1016.1 1018.4 1016.8 1014.7 1011.9 1015.4 1017.2 1021.8 1021.2 1023.4 1017.9 MAX. QNH PRESSURE IN HPA 1023.2 1024.0 1022.0 1021.2 1021.9 1021.0 1014.3 1020.8 1022.6 1024.0 1025.7 1028.7 1028.7 DAY 12 12 31 4 28 1 19 20 30 11 15 6 MIN. QNH PRESSURE IN HPA 1011.7 1009.8 1009.4 1013.7 1011.8 1008.6 1007.6 1011.2 1014.0 1019.8 1016.3 1018.8 1007.6 DAY 18 6 3 9 21 24 12 7 16 8 12 15 MEAN QFF PRESSURE IN HPA 1017.9 1015.6 1010.9 1007.8 1002.2 996.5 992.6 997.6 1001.4 1010.8 1014.8 1022.1 1007.5 MAX. QFF PRESSURE IN HPA 1027.3 1020.8 1019.3 1013.9 1006.3 1004.2 996.0 1003.3 1010.4 1014.1 1021.7 1029.2 1029.2 DAY 5 1 19 11 28 1 29 20 30 29 15 6 MIN. QFF PRESSURE IN HPA 1008.7 1006.4 1003.2 1001.3 996.2 990.2 987.7 992.7 997.7 1007.8 1007.1 1014.2 987.7 DAY 18 6 2 9 21 24 11 7 16 8 12 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.0 815.4 813.2 814.9 813.6 811.9 809.5 812.2 813.6 817.2 816.7 818.5 814.3 MAX. QFE PRESSURE IN HPA 819.0 819.3 818.0 816.9 818.2 817.2 811.6 817.0 818.0 819.4 820.7 823.0 823.0 DAY 12 12 31 4 28 1 19 19 30 11 14 6 MIN. QFE PRESSURE IN HPA 810.0 808.3 808.3 811.6 808.7 807.0 805.8 809.0 811.0 815.2 812.8 814.3 805.8 DAY 18 6 3 8 21 24 12 7 16 8 12 15 MEAN QNH PRESSURE IN HPA 1017.3 1017.7 1015.1 1017.1 1015.5 1013.4 1010.6 1013.9 1015.6 1019.9 1019.2 1021.4 1016.4 MAX. QNH PRESSURE IN HPA 1022.0 1022.4 1020.8 1019.5 1021.0 1019.8 1013.1 1019.6 1020.8 1022.5 1024.0 1026.8 1026.8 DAY 12 12 31 4 28 1 19 19 30 11 14 6 MIN. QNH PRESSURE IN HPA 1011.2 1009.2 1009.2 1013.1 1009.7 1007.6 1006.2 1010.0 1012.4 1017.5 1014.6 1016.4 1006.2 DAY 18 6 3 8 21 24 12 7 16 8 12 15 MEAN QFF PRESSURE IN HPA 1015.8 1013.7 1009.6 1006.3 1000.8 995.2 991.0 995.8 999.3 1008.6 1012.6 1019.0 1005.6 MAX. QFF PRESSURE IN HPA 1024.7 1019.3 1016.5 1011.8 1004.9 1003.1 994.8 1002.8 1007.3 1012.0 1019.1 1026.8 1026.8 DAY 5 7 19 11 6 1 31 19 30 16 15 6 MIN. QFF PRESSURE IN HPA 1008.0 1005.0 1004.9 1001.1 994.0 988.8 986.6 991.2 995.7 1003.8 1004.6 1011.6 986.6 DAY 18 21 3 8 21 24 12 7 7 8 12 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.6 814.0 811.6 813.4 812.1 810.4 808.1 810.9 812.1 815.7 815.5 817.2 812.9 MAX. QFE PRESSURE IN HPA 818.0 817.3 816.0 815.9 816.7 815.6 810.2 815.3 816.4 817.6 819.5 821.3 821.3 DAY 2 12 31 5 28 1 18 19 30 11 14 6 MIN. QFE PRESSURE IN HPA 807.6 807.8 807.5 810.2 806.7 804.6 804.0 807.8 809.4 813.7 811.6 813.6 804.0 DAY 18 6 3 14 21 24 12 6 16 8 12 15 MEAN QNH PRESSURE IN HPA 1015.5 1016.0 1013.1 1015.3 1013.7 1011.8 1008.9 1012.3 1013.8 1018.0 1017.8 1019.9 1014.7 MAX. QNH PRESSURE IN HPA 1020.8 1020.0 1018.4 1018.3 1019.2 1017.9 1011.5 1017.6 1018.9 1020.3 1022.6 1024.8 1024.8 DAY 2 12 31 5 28 1 18 19 30 11 14 6 MIN. QNH PRESSURE IN HPA 1008.4 1008.6 1008.2 1011.5 1007.3 1004.8 1004.0 1008.6 1010.5 1015.7 1013.1 1015.5 1004.0 DAY 18 6 3 14 21 24 12 6 16 8 12 15 MEAN QFF PRESSURE IN HPA 1013.8 1011.8 1007.8 1005.2 999.9 994.1 990.0 994.7 998.6 1007.4 1011.6 1017.5 1004.4 MAX. QFF PRESSURE IN HPA 1022.0 1017.9 1013.9 1009.7 1004.5 1001.6 993.8 1000.9 1007.0 1010.3 1018.5 1025.5 1025.5 DAY 5 7 19 11 1 1 31 19 30 29 14 6 MIN. QFF PRESSURE IN HPA 1003.9 1003.0 1003.8 999.8 992.6 986.6 984.8 989.6 994.6 1002.4 1003.8 1009.6 984.8 DAY 18 6 2 9 20 24 12 6 1 8 12 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.3 814.5 811.8 813.4 812.0 810.0 807.8 811.0 812.2 816.1 816.2 818.0 813.1 MAX. QFE PRESSURE IN HPA 819.0 817.5 816.0 816.2 816.3 815.4 810.1 815.4 817.0 818.2 820.4 821.3 821.3 DAY 2 7 31 4 27 1 19 19 30 16 14 6 MIN. QFE PRESSURE IN HPA 808.1 809.8 806.7 810.2 806.7 804.6 804.3 807.8 809.2 814.1 813.1 814.0 804.3 DAY 18 6 2 14 21 24 11 6 16 8 12 15 MEAN QNH PRESSURE IN HPA 1016.3 1016.6 1013.4 1015.3 1013.6 1011.2 1008.6 1012.4 1013.8 1018.5 1018.6 1020.8 1014.9 MAX. QNH PRESSURE IN HPA 1022.0 1020.2 1018.4 1018.6 1018.8 1017.7 1011.3 1017.7 1019.6 1021.0 1023.7 1024.8 1024.8 DAY 2 7 31 4 27 1 19 19 30 16 14 6 MIN. QNH PRESSURE IN HPA 1008.9 1011.0 1007.3 1011.5 1007.3 1004.8 1004.4 1008.6 1010.3 1016.1 1014.9 1016.0 1004.4 DAY 18 6 2 14 21 24 11 6 16 8 12 15 MEAN QFF PRESSURE IN HPA 1016.2 1013.8 1009.4 1006.1 1000.0 993.5 990.3 996.0 999.9 1009.9 1014.7 1021.7 1006.0 MAX. QFF PRESSURE IN HPA 1026.5 1020.9 1016.4 1010.9 1004.6 1001.4 995.0 1001.7 1010.3 1013.2 1024.1 1028.0 1028.0 DAY 5 7 7 11 1 1 28 20 30 29 14 24 MIN. QFF PRESSURE IN HPA 1005.5 1007.2 1002.6 1001.3 991.9 986.2 985.5 991.5 995.1 1005.7 1008.4 1013.3 985.5 DAY 18 6 2 9 20 24 11 6 12 8 12 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 815.2 815.4 812.9 814.5 813.1 810.8 809.0 812.1 813.2 816.9 816.9 818.9 814.1 MAX. QFE PRESSURE IN HPA 819.7 818.5 817.0 817.4 817.8 816.2 811.4 816.4 817.6 818.8 820.6 822.0 822.0 DAY 2 12 31 4 27 1 8 18 30 11 14 6 MIN. QFE PRESSURE IN HPA 808.9 809.5 807.6 811.4 808.0 806.0 806.0 808.7 810.6 815.0 814.0 815.0 806.0 DAY 18 5 2 9 20 23 11 6 15 8 11 15 MEAN QNH PRESSURE IN HPA 1017.4 1017.7 1014.6 1016.6 1014.9 1012.2 1010.0 1013.7 1015.1 1019.5 1019.5 1021.9 1016.1 MAX. QNH PRESSURE IN HPA 1022.8 1021.4 1019.6 1020.1 1020.6 1018.6 1012.9 1018.9 1020.3 1021.8 1023.9 1025.6 1025.6 DAY 2 12 31 4 27 1 8 18 30 11 14 6 MIN. QNH PRESSURE IN HPA 1009.9 1010.6 1008.4 1012.9 1008.8 1006.4 1006.4 1009.7 1011.9 1017.2 1016.0 1017.2 1006.4 DAY 18 5 2 9 20 23 11 6 15 8 11 15 MEAN QFF PRESSURE IN HPA 1016.7 1014.0 1009.3 1005.9 1000.2 994.0 990.8 995.8 999.5 1008.6 1013.3 1020.6 1005.7 MAX. QFF PRESSURE IN HPA 1025.8 1020.6 1017.2 1011.1 1005.5 1001.3 994.8 1001.2 1007.6 1011.8 1021.1 1027.6 1027.6 DAY 2 7 19 11 27 1 31 18 30 28 30 6 MIN. QFF PRESSURE IN HPA 1008.1 1007.1 1003.6 999.5 992.2 987.4 986.9 991.0 995.7 1004.6 1007.4 1011.9 986.9 DAY 18 5 2 8 20 24 11 6 15 8 11 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 815.0 815.2 812.8 814.4 813.0 810.9 809.1 811.9 813.2 816.8 816.9 818.7 814.0 MAX. QFE PRESSURE IN HPA 819.7 818.5 817.2 817.4 817.8 815.6 811.4 816.2 817.6 818.7 820.6 822.3 822.3 DAY 2 7 31 4 27 1 8 18 30 10 14 5 MIN. QFE PRESSURE IN HPA 808.9 808.2 807.6 810.2 808.2 806.6 806.0 808.5 810.6 815.0 813.4 815.0 806.0 DAY 18 5 2 8 20 23 11 6 15 8 11 15 MEAN QNH PRESSURE IN HPA 1017.2 1017.5 1014.6 1016.5 1014.9 1012.3 1010.2 1013.6 1015.0 1019.4 1019.4 1021.6 1016.0 MAX. QNH PRESSURE IN HPA 1022.8 1021.4 1019.8 1020.1 1020.6 1017.9 1012.9 1018.6 1020.3 1021.6 1023.9 1025.9 1025.9 DAY 2 7 31 4 27 1 8 18 30 10 14 5 MIN. QNH PRESSURE IN HPA 1009.9 1009.1 1008.4 1011.5 1009.1 1007.2 1006.4 1009.4 1011.9 1017.2 1015.3 1017.2 1006.4 DAY 18 5 2 8 20 23 11 6 15 8 11 15 MEAN QFF PRESSURE IN HPA 1015.8 1013.2 1009.0 1005.6 1000.0 993.9 990.6 995.4 998.9 1008.2 1013.0 1019.3 1005.2 MAX. QFF PRESSURE IN HPA 1026.4 1019.6 1016.5 1009.9 1005.2 1000.3 994.4 1001.5 1006.7 1011.3 1020.2 1025.0 1026.4 DAY 2 7 19 16 30 1 31 18 30 29 14 5 MIN. QFF PRESSURE IN HPA 1008.3 1005.0 1004.8 997.4 992.5 988.2 986.2 990.6 995.2 1003.3 1005.4 1012.0 986.2 DAY 18 5 12 8 20 23 11 6 17 8 11 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.8 5.0 9.2 17.7 23.0 25.8 26.9 25.8 23.1 15.5 8.4 5.7 15.8 MINIMUN AIR TEMPERATURE (C) -2.6 -3.4 -0.6 7.7 11.5 15.1 18.6 15.7 13.7 5.7 1.6 -0.9 6.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 9 0 0 0 0 0 10 DAYS WITH MINIMUM TEMP. <=-4 13 18 9 0 0 0 0 0 0 0 1 9 50 DAYS WITH FREEZING MIN.<= 0 20 22 17 0 0 0 0 0 0 0 13 17 89 TEMPERATURE RECORDS LOWEST(C) -9.4 -10.4 -8.6 1.6 7.0 10.0 13.6 11.0 9.4 2.0 -4.6 -8.0 -10.4 DAY 25 10 4 1 14 23 21 14 25 25 26 30 MAXIMUM AIR TEMPERATURE (C) 10.9 13.4 17.8 26.6 32.1 33.7 33.7 33.2 31.4 24.8 15.3 13.0 23.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 28 26 31 30 22 0 0 0 137 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.4 19.4 24.0 29.6 35.5 37.4 38.0 35.6 34.2 29.2 24.0 19.4 38.0 DAY 5 27 24 21 31 29 9 4 1 1 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 13.5 16.8 18.4 18.9 20.6 18.6 15.1 17.5 17.7 19.1 13.7 13.9 17.0 MEAN DAILY TEMP. (MDT) (C) 4.2 5.0 8.6 17.1 21.8 24.4 26.1 24.4 22.5 15.2 8.5 6.0 15.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.9 36.6 103.5 159.2 106.3 57.1 0.0 0.0 0.0 463.8 HEATING DEG. DAYS(BASE 18 0C) 429.1 375.8 291.8 44.0 0.0 0.0 0.0 0.0 0.0 89.4 285.6 371.2 1887.0 DEWPOINT (MEAN C) -5.7 -8.3 -10.1 -5.3 -4.1 -4.1 -2.2 -4.7 -3.1 -4.5 -1.6 -3.5 -4.8 MIXING RATIO (G/KG) 3.45 2.66 2.38 3.32 3.59 3.57 4.17 3.44 3.90 3.55 4.40 3.81 3.52 VAPOUR PRESSURE (HPA) 4.48 3.46 3.10 4.32 4.66 4.62 5.39 4.46 5.07 4.63 5.74 4.96 4.57 SATURATION DEF. (HPA) 4.12 6.12 9.66 17.60 25.71 30.53 31.65 30.27 24.92 14.38 5.95 4.89 17.15 RELATIVE HUMIDITY (MEAN %) 58 43 28 24 18 15 16 14 19 29 56 56 31 RELATIVE HUMIDITY (MAX. %) 80 75 51 42 31 25 23 23 32 47 80 79 49 RELATIVE HUMIDITY (MIN. %) 34 19 12 11 9 8 10 8 10 15 32 32 17 RELATIVE HUMIDITY (MEAN% 03UTC) 75 73 48 41 29 23 22 22 32 46 77 75 47 RELATIVE HUMIDITY (MEAN% 09UTC) 42 25 17 13 10 10 11 9 12 19 38 39 20 RELATIVE HUMIDITY (MEAN% 15UTC) 47 28 17 14 12 11 12 10 13 21 48 47 23 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 72.4 1.0 2.0 1.0 0.0 0.0 0.0 0.0 0.0 2.8 33.0 32.9 145.1 DAYS WITH PRECIPITATION >=10 3 0 0 0 0 0 0 0 0 0 2 2 7 DAYS WITH PRECIPITATION >= 5 7 0 0 0 0 0 0 0 0 0 2 2 11 DAYS WITH PRECIPITATION >= 1 7 1 1 1 0 0 0 0 0 1 5 3 19 DAYS WITH PRECIPITATION 8 1 1 1 0 0 0 0 0 2 7 4 24 GREATEST DAILY PRECIPITATION 21.0 1.0 2.0 1.0 0.0 0.0 0.0 0.0 0.0 2.2 12.4 14.0 21.0 DAY 17 14 26 25 ** ** ** ** ** 4 9 11 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 2 4 5 2 0 2 0 0 0 0 0 0 15 WIND DIRECTION (PREVAILING) 225 225 270 270 270 360 360 360 45 45 45 180 360 PREVAILING WIND SPEED(KNOTS) 8.9 11.2 12.4 10.2 9.0 10.6 11.8 11.5 8.1 6.9 7.1 7.3 11.1 PREVAILING WIND PERCENT 11.3 14.2 16.5 17.1 13.3 14.2 39.9 38.7 15.4 6.9 5.8 10.1 9.8 CALMS PERCENT OF WIND 44.8 52.2 48.0 58.8 58.5 40.4 23.0 25.4 51.3 68.5 73.3 58.5 50.1 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 192 256 262 259 247 20 14 14 24 235 186 181 321 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.1 3.1 2.6 1.7 1.2 6.2 6.1 0.5 0.5 0.5 0.8 0.9 WIND STEADINESES (MEAN %) 40.4 45.7 55.4 68.4 51.5 24.0 77.5 80.3 12.8 20.8 25.0 25.0 20.0 WIND SPEED (MEAN KNOTS) 4.7 4.6 5.6 3.8 3.3 5.0 8.0 7.6 3.9 2.4 2.0 3.2 4.5 FASTEST WIND DIRECTION 210 360 240 260 270 360 20 360 20 240 30 270 240 FASTEST WIND SPEED (KNOTS) 29 23 31 27 16 19 27 27 27 16 16 19 31 DAY 28 3 9 24 1 30 17 28 9 2 16 6 DAYS WITH SKY CLEAR (0-2)/8 20 21 22 21 28 27 25 29 28 27 14 19 281 DAYS WITH P.CLOUDY (3-6)/8 6 8 7 8 3 3 6 2 2 4 12 7 68 DAYS WITH CLOUDY (7-8)/8 5 0 2 1 0 0 0 0 0 0 4 5 17 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 0 0 0 0 0 0 2 0 3 DURATION OF SUNSHINE HOURS 213.8 263.0 274.9 296.1 374.1 347.4 344.8 365.0 305.5 308.3 212.0 217.4 3522.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.1 813.7 813.4 814.6 812.5 810.3 810.8 812.0 813.5 817.1 817.2 816.5 813.8 MAX. QFE PRESSURE IN HPA 821.2 820.3 818.0 818.0 818.1 814.7 816.0 816.2 819.5 821.7 823.5 822.2 823.5 DAY-HOUR 31- 6 11- 6 22- 6 10- 6 6- 6 17- 6 30- 6 23- 6 29- 6 16- 6 17- 6 17- 6 MIN. QFE PRESSURE IN HPA 808.0 805.5 807.7 811.0 807.7 806.0 805.5 806.3 805.5 812.2 810.0 808.7 805.5 DAY-HOUR 17-12 7-12 2-12 6-12 17-15 26-12 9-15 31-15 1-12 2-12 6-12 15-12 MEAN QNH PRESSURE IN HPA 1016.1 1015.7 1015.3 1016.7 1014.2 1011.6 1012.1 1013.6 1015.4 1019.7 1019.9 1019.0 1015.8 MAX. QNH PRESSURE IN HPA 1024.6 1023.6 1020.8 1020.8 1020.9 1016.9 1018.4 1018.6 1022.6 1025.2 1027.4 1025.8 1027.4 DAY-HOUR 31- 6 11- 6 22- 6 10- 6 6- 6 17- 6 30- 6 23- 6 29- 6 16- 6 17- 6 17- 6 MIN. QNH PRESSURE IN HPA 1008.8 1005.8 1008.5 1012.4 1008.5 1006.4 1005.8 1006.8 1005.8 1013.9 1011.2 1009.7 1005.8 DAY-HOUR 17-12 7-12 2-12 6-12 17-15 26-12 9-15 31-15 1-12 2-12 6-12 15-12 MEAN QFF PRESSURE IN HPA 1015.1 1013.9 1010.3 1005.4 999.0 994.5 994.2 996.5 1000.2 1010.0 1015.3 1016.6 1005.9 MAX. QFF PRESSURE IN HPA 1028.7 1026.9 1020.6 1012.4 1006.6 1000.7 1002.6 1003.6 1010.0 1017.6 1024.8 1028.8 1028.8 DAY-HOUR 31- 3 11- 3 4- 3 1- 6 1- 3 17- 6 26- 6 21- 3 29- 3 30- 3 30- 3 17- 6 MIN. QFF PRESSURE IN HPA 1006.1 1002.2 1002.8 998.7 992.2 988.1 984.8 989.9 988.8 998.8 1003.5 1005.5 984.8 DAY-HOUR 10-12 7-12 2-12 21-12 27-15 24-21 9-21 31-12 1-18 1-12 6-12 15-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 813.9 813.3 813.1 814.3 812.2 810.1 810.6 811.9 813.2 816.9 817.0 816.3 813.6 MAX. QFE PRESSURE IN HPA 820.3 818.4 816.3 815.8 815.8 813.0 814.8 814.0 817.2 819.3 821.0 820.6 821.0 DAY 31 11 22 10 7 4 30 14 30 26 30 1 MIN. QFE PRESSURE IN HPA 810.1 806.5 810.3 811.3 809.1 807.7 806.5 808.0 807.0 813.4 811.6 810.1 806.5 DAY 21 8 3 7 17 7 10 31 1 2 22 15 MEAN QNH PRESSURE IN HPA 1015.9 1015.2 1014.9 1016.3 1013.9 1011.3 1011.9 1013.5 1015.1 1019.5 1019.5 1018.8 1015.5 MAX. QNH PRESSURE IN HPA 1023.6 1021.3 1018.8 1018.2 1018.2 1014.8 1017.0 1016.0 1019.8 1022.4 1024.4 1023.9 1024.4 DAY 31 11 22 10 7 4 30 14 30 26 30 1 MIN. QNH PRESSURE IN HPA 1011.3 1007.0 1011.6 1012.8 1010.2 1008.5 1007.0 1008.8 1007.6 1015.3 1013.1 1011.3 1007.0 DAY 21 8 3 7 17 7 10 31 1 2 22 15 MEAN QFF PRESSURE IN HPA 1014.2 1012.8 1009.6 1005.1 999.1 994.7 994.1 996.4 999.6 1009.2 1014.4 1015.6 1005.4 MAX. QFF PRESSURE IN HPA 1026.0 1023.8 1018.2 1010.2 1004.7 998.6 1000.1 1002.3 1006.1 1013.5 1021.1 1024.2 1026.0 DAY 31 11 4 1 1 19 23 14 29 30 30 18 MIN. QFF PRESSURE IN HPA 1007.7 1003.7 1005.4 1001.1 995.0 990.9 985.4 990.9 991.1 1000.6 1005.2 1006.2 985.4 DAY 21 28 25 18 27 7 10 31 2 1 6 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 814.3 813.9 813.9 815.2 813.3 811.3 811.6 812.8 814.3 817.7 817.6 816.8 814.4 MAX. QFE PRESSURE IN HPA 820.6 819.3 817.5 816.8 816.8 814.0 815.4 815.4 818.5 820.5 822.1 820.9 822.1 DAY 31 11 22 10 7 4 30 23 29 26 17 1 MIN. QFE PRESSURE IN HPA 808.4 807.7 811.3 812.6 809.6 808.4 806.9 808.8 808.0 814.3 812.0 809.8 806.9 DAY 17 8 14 6 17 26 12 31 1 2 22 15 MEAN QNH PRESSURE IN HPA 1016.4 1015.9 1015.9 1017.4 1015.2 1012.7 1013.1 1014.6 1016.4 1020.5 1020.3 1019.4 1016.5 MAX. QNH PRESSURE IN HPA 1023.9 1022.4 1020.2 1019.4 1019.4 1016.0 1017.7 1017.7 1021.4 1023.8 1025.7 1024.3 1025.7 DAY 31 11 22 10 7 4 30 23 29 26 17 1 MIN. QNH PRESSURE IN HPA 1009.3 1008.5 1012.8 1014.3 1010.7 1009.3 1007.5 1009.8 1008.8 1016.4 1013.6 1011.0 1007.5 DAY 17 8 14 6 17 26 12 31 1 2 22 15 MEAN QFF PRESSURE IN HPA 1016.5 1015.4 1012.3 1007.2 1000.4 996.1 995.7 998.6 1002.4 1012.5 1017.2 1018.2 1007.7 MAX. QFF PRESSURE IN HPA 1028.7 1026.9 1020.6 1012.2 1006.6 1000.4 1002.4 1003.6 1010.0 1017.6 1024.8 1028.4 1028.7 DAY 31 11 4 2 1 17 26 21 29 30 30 18 MIN. QFF PRESSURE IN HPA 1008.3 1005.8 1007.4 1002.9 995.5 991.5 987.0 992.9 992.6 1005.2 1007.3 1006.6 987.0 DAY 10 7 25 18 27 25 10 31 2 1 6 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.5 815.3 815.0 816.2 814.1 811.9 812.1 813.4 815.2 818.9 818.6 818.1 815.4 MAX. QFE PRESSURE IN HPA 821.2 820.3 818.0 818.0 818.1 814.7 816.0 816.2 819.5 821.7 823.5 822.2 823.5 DAY 31 11 22 10 6 17 30 23 29 16 17 17 MIN. QFE PRESSURE IN HPA 809.2 809.4 811.8 813.7 810.5 809.2 807.8 809.6 808.2 815.0 813.2 811.8 807.8 DAY 17 8 2 6 17 26 12 31 1 2 22 15 MEAN QNH PRESSURE IN HPA 1017.9 1017.5 1017.3 1018.7 1016.2 1013.5 1013.7 1015.3 1017.5 1021.9 1021.6 1020.9 1017.6 MAX. QNH PRESSURE IN HPA 1024.6 1023.6 1020.8 1020.8 1020.9 1016.9 1018.4 1018.6 1022.6 1025.2 1027.4 1025.8 1027.4 DAY 31 11 22 10 6 17 30 23 29 16 17 17 MIN. QNH PRESSURE IN HPA 1010.3 1010.5 1013.4 1015.7 1011.8 1010.3 1008.6 1010.7 1009.1 1017.2 1015.1 1013.4 1008.6 DAY 17 8 2 6 17 26 12 31 1 2 22 15 MEAN QFF PRESSURE IN HPA 1017.0 1015.8 1012.0 1006.8 1000.6 995.9 995.4 997.9 1001.8 1011.7 1016.9 1018.5 1007.5 MAX. QFF PRESSURE IN HPA 1027.5 1026.6 1018.1 1012.4 1005.3 1000.7 1002.6 1002.2 1008.8 1015.2 1024.7 1028.8 1028.8 DAY 31 11 4 1 1 17 26 13 29 30 30 17 MIN. QFF PRESSURE IN HPA 1009.7 1007.0 1006.7 1002.5 996.3 992.2 987.5 992.7 991.2 1003.3 1008.5 1008.8 987.5 DAY 17 7 24 22 31 26 10 31 2 2 6 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 814.1 814.1 813.8 814.9 813.0 810.7 810.8 812.2 813.9 817.3 817.2 816.4 814.0 MAX. QFE PRESSURE IN HPA 819.5 819.0 816.8 816.5 816.6 813.4 814.3 814.9 818.3 820.0 822.3 821.2 822.3 DAY 31 11 22 10 6 17 30 23 29 26 17 17 MIN. QFE PRESSURE IN HPA 808.6 806.2 809.2 812.6 809.3 807.6 806.5 808.2 807.0 813.6 811.4 809.3 806.2 DAY 17 7 2 6 17 26 12 31 1 2 6 15 MEAN QNH PRESSURE IN HPA 1016.2 1016.1 1015.7 1017.1 1014.8 1012.1 1012.2 1013.8 1015.9 1020.0 1019.8 1018.9 1016.1 MAX. QNH PRESSURE IN HPA 1022.6 1022.0 1019.4 1019.0 1019.1 1015.3 1016.4 1017.1 1021.2 1023.2 1025.9 1024.6 1025.9 DAY 31 11 22 10 6 17 30 23 29 26 17 17 MIN. QNH PRESSURE IN HPA 1009.5 1006.7 1010.3 1014.3 1010.4 1008.4 1007.0 1009.1 1007.6 1015.5 1012.9 1010.4 1006.7 DAY 17 7 2 6 17 26 12 31 1 2 6 15 MEAN QFF PRESSURE IN HPA 1014.5 1013.7 1010.0 1005.4 999.4 994.6 993.8 996.0 999.8 1009.3 1014.6 1015.8 1005.6 MAX. QFF PRESSURE IN HPA 1024.6 1024.5 1015.7 1011.3 1005.1 999.6 1000.0 1000.5 1007.7 1012.5 1022.4 1026.2 1026.2 DAY 31 11 1 1 1 17 23 13 29 6 17 17 MIN. QFF PRESSURE IN HPA 1007.7 1002.3 1005.2 1001.0 995.2 989.4 985.7 990.4 990.7 1001.2 1004.9 1006.5 985.7 DAY 21 7 24 21 27 25 12 31 1 2 6 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 812.9 812.6 812.1 813.4 811.4 809.3 809.7 811.0 812.4 815.9 816.0 815.3 812.7 MAX. QFE PRESSURE IN HPA 818.0 817.0 815.2 814.8 814.4 812.2 814.0 813.8 816.8 818.8 820.8 819.7 820.8 DAY 30 11 21 8 5 3 30 13 29 16 17 17 MIN. QFE PRESSURE IN HPA 808.0 805.5 807.7 811.0 808.0 806.0 805.7 807.0 805.5 812.2 810.0 808.7 805.5 DAY 17 7 2 6 17 26 9 31 1 2 6 15 MEAN QNH PRESSURE IN HPA 1014.7 1014.3 1013.7 1015.3 1012.8 1010.4 1010.9 1012.4 1014.1 1018.3 1018.4 1017.6 1014.4 MAX. QNH PRESSURE IN HPA 1020.8 1019.6 1017.5 1017.0 1016.5 1013.9 1016.0 1015.8 1019.4 1021.8 1024.2 1022.8 1024.2 DAY 30 11 21 8 5 3 30 13 29 16 17 17 MIN. QNH PRESSURE IN HPA 1008.8 1005.8 1008.5 1012.4 1008.8 1006.4 1006.1 1007.6 1005.8 1013.9 1011.2 1009.7 1005.8 DAY 17 7 2 6 17 26 9 31 1 2 6 15 MEAN QFF PRESSURE IN HPA 1013.0 1011.8 1008.4 1004.0 998.0 993.7 993.1 995.3 998.7 1008.0 1013.4 1014.4 1004.3 MAX. QFF PRESSURE IN HPA 1020.9 1021.7 1013.4 1009.6 1003.6 998.2 999.0 1000.2 1005.6 1012.0 1021.0 1023.8 1023.8 DAY 31 11 3 1 1 17 29 14 29 25 17 17 MIN. QFF PRESSURE IN HPA 1006.1 1002.2 1002.8 998.7 993.3 989.9 985.2 989.9 989.7 998.8 1003.5 1005.5 985.2 DAY 10 7 2 21 27 6 10 31 2 1 6 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 813.6 813.0 812.3 813.6 811.2 809.0 809.8 811.0 812.3 816.1 816.7 816.0 812.9 MAX. QFE PRESSURE IN HPA 818.8 817.0 815.4 817.0 814.4 812.0 814.4 814.0 816.5 818.8 822.0 820.1 822.0 DAY 30 11 21 24 5 21 30 13 29 16 17 17 MIN. QFE PRESSURE IN HPA 809.0 805.5 807.7 811.0 807.7 806.3 805.5 806.3 805.5 812.7 810.4 810.1 805.5 DAY 17 7 2 6 17 26 9 31 1 1 6 15 MEAN QNH PRESSURE IN HPA 1015.5 1014.8 1014.0 1015.5 1012.6 1010.1 1011.0 1012.4 1014.0 1018.6 1019.2 1018.4 1014.7 MAX. QNH PRESSURE IN HPA 1021.8 1019.6 1017.7 1019.6 1016.5 1013.6 1016.5 1016.0 1019.0 1021.8 1025.6 1023.3 1025.6 DAY 30 11 21 24 5 21 30 13 29 16 17 17 MIN. QNH PRESSURE IN HPA 1010.0 1005.8 1008.5 1012.4 1008.5 1006.8 1005.8 1006.8 1005.8 1014.5 1011.7 1011.3 1005.8 DAY 17 7 2 6 17 26 9 31 1 1 6 15 MEAN QFF PRESSURE IN HPA 1015.7 1014.2 1010.3 1005.2 997.7 993.4 993.6 996.4 1000.1 1010.7 1016.2 1017.3 1005.9 MAX. QFF PRESSURE IN HPA 1023.3 1023.8 1017.4 1010.1 1004.3 997.6 1000.4 1001.9 1007.4 1016.4 1023.5 1028.4 1028.4 DAY 25 10 3 1 1 17 26 23 29 25 17 17 MIN. QFF PRESSURE IN HPA 1009.0 1003.1 1003.2 1000.5 992.2 989.8 985.3 990.4 990.4 1002.3 1005.7 1008.4 985.3 DAY 29 7 2 21 27 9 10 31 1 1 6 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 814.4 813.9 813.4 814.7 812.3 810.0 810.8 812.0 813.4 817.1 817.5 816.9 813.9 MAX. QFE PRESSURE IN HPA 820.4 818.4 816.5 817.3 815.7 813.4 815.0 815.0 817.4 819.4 822.2 820.6 822.2 DAY 30 10 21 24 6 21 29 13 29 16 17 17 MIN. QFE PRESSURE IN HPA 810.6 806.5 809.0 812.0 809.2 807.0 806.0 807.3 806.4 814.0 810.7 810.6 806.0 DAY 10 7 2 6 17 24 9 31 1 1 6 15 MEAN QNH PRESSURE IN HPA 1016.5 1015.9 1015.3 1016.8 1014.0 1011.2 1012.2 1013.6 1015.3 1019.7 1020.2 1019.5 1015.9 MAX. QNH PRESSURE IN HPA 1023.7 1021.3 1019.0 1020.0 1018.1 1015.3 1017.2 1017.2 1020.1 1022.5 1025.8 1023.9 1025.8 DAY 30 10 21 24 6 21 29 13 29 16 17 17 MIN. QNH PRESSURE IN HPA 1011.9 1007.0 1010.0 1013.6 1010.3 1007.6 1006.4 1008.0 1006.9 1016.0 1012.1 1011.9 1006.4 DAY 10 7 2 6 17 24 9 31 1 1 6 15 MEAN QFF PRESSURE IN HPA 1015.7 1014.2 1009.9 1004.8 998.3 993.6 994.0 996.2 999.7 1009.6 1015.5 1017.1 1005.7 MAX. QFF PRESSURE IN HPA 1026.4 1025.0 1017.7 1009.6 1003.0 998.9 1000.7 1001.7 1005.9 1013.4 1023.4 1027.7 1027.7 DAY 30 10 3 1 1 17 26 13 29 29 17 17 MIN. QFF PRESSURE IN HPA 1010.0 1004.3 1004.4 999.7 993.3 988.8 985.9 990.1 988.8 1002.1 1005.8 1009.3 985.9 DAY 9 7 2 21 31 6 9 30 1 1 6 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 814.1 813.9 813.5 814.6 812.4 810.2 810.8 811.8 813.5 817.0 817.3 816.5 813.8 MAX. QFE PRESSURE IN HPA 820.7 818.4 816.3 816.2 815.8 813.4 815.0 815.0 817.4 819.4 821.3 820.6 821.3 DAY 30 10 21 24 6 21 30 23 29 16 29 17 MIN. QFE PRESSURE IN HPA 810.2 806.5 809.7 811.7 809.2 807.0 806.0 807.0 807.4 814.0 811.3 810.9 806.0 DAY 10 7 2 6 17 24 9 31 1 1 6 15 MEAN QNH PRESSURE IN HPA 1016.1 1015.9 1015.4 1016.7 1014.1 1011.5 1012.2 1013.4 1015.4 1019.6 1020.0 1019.0 1015.8 MAX. QNH PRESSURE IN HPA 1024.0 1021.3 1018.8 1018.6 1018.2 1015.3 1017.2 1017.2 1020.1 1022.5 1024.8 1023.9 1024.8 DAY 30 10 21 24 6 21 30 23 29 16 29 17 MIN. QNH PRESSURE IN HPA 1011.5 1007.0 1010.9 1013.3 1010.3 1007.6 1006.4 1007.6 1008.1 1016.0 1012.8 1012.3 1006.4 DAY 10 7 2 6 17 24 9 31 1 1 6 15 MEAN QFF PRESSURE IN HPA 1014.5 1013.4 1009.6 1004.8 998.6 993.9 993.8 995.6 999.3 1009.1 1014.7 1016.0 1005.3 MAX. QFF PRESSURE IN HPA 1026.4 1024.2 1017.3 1009.3 1003.1 998.4 1000.1 1001.1 1005.4 1013.0 1021.7 1026.2 1026.4 DAY 30 10 3 1 3 18 25 13 28 6 17 17 MIN. QFF PRESSURE IN HPA 1008.2 1004.3 1004.4 1000.3 994.6 988.1 984.8 990.2 990.7 1001.7 1006.3 1008.1 984.8 DAY 20 7 24 21 26 24 9 30 1 1 6 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.6 4.9 11.0 17.0 22.7 26.5 29.3 26.6 22.7 16.7 9.3 8.1 16.5 MINIMUN AIR TEMPERATURE (C) -5.4 -4.0 2.6 6.3 12.2 16.9 21.0 17.1 12.9 6.6 -0.2 2.2 7.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 3 20 2 0 0 0 0 25 DAYS WITH MINIMUM TEMP. <=-4 23 20 0 0 0 0 0 0 0 0 6 0 49 DAYS WITH FREEZING MIN.<= 0 28 23 5 0 0 0 0 0 0 0 17 11 84 TEMPERATURE RECORDS LOWEST(C) -14.0 -10.6 -2.6 1.4 3.4 11.2 13.0 11.0 7.0 2.4 -5.6 -3.6 -14.0 DAY 30 1 12 11 7 25 31 16 26 12 26 29 MAXIMUM AIR TEMPERATURE (C) 11.5 13.5 19.1 26.1 31.0 34.1 36.0 34.1 31.2 26.5 18.7 14.7 24.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 21 30 31 31 20 2 0 0 135 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.6 19.2 24.2 29.6 35.4 37.0 39.6 36.0 34.8 30.4 24.4 18.2 39.6 DAY 16 20 31 26 16 28 10 9 3 1 6 7 DIF. BETWEEN (MAX.-MIN.) (C) 16.9 17.5 16.5 19.8 18.8 17.2 15.0 17.0 18.3 19.9 18.9 12.5 17.3 MEAN DAILY TEMP. (MDT) (C) 3.0 4.7 10.9 16.2 21.6 25.5 28.5 25.6 22.0 16.6 9.3 8.4 16.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 43.0 135.3 232.9 143.4 51.2 1.6 0.0 0.0 607.5 HEATING DEG. DAYS(BASE 18 0C) 464.0 371.3 220.9 61.1 3.6 0.0 0.0 0.0 0.5 50.9 261.9 297.0 1731.2 DEWPOINT (MEAN C) -9.5 -10.4 -4.8 -7.1 -4.0 -2.5 0.7 -3.4 -2.9 -6.0 -7.7 0.6 -4.7 MIXING RATIO (G/KG) 2.43 2.37 3.58 2.94 3.67 4.42 5.38 4.01 3.91 3.10 2.83 5.12 3.65 VAPOUR PRESSURE (HPA) 3.17 3.08 4.65 3.83 4.76 5.70 6.93 5.20 5.08 4.05 3.70 6.68 4.74 SATURATION DEF. (HPA) 4.91 6.43 9.44 17.21 24.75 30.53 35.44 31.28 24.32 16.65 9.18 4.61 17.90 RELATIVE HUMIDITY (MEAN %) 47 39 39 22 20 18 18 16 20 23 34 64 30 RELATIVE HUMIDITY (MAX. %) 74 68 67 41 34 30 29 26 32 39 57 85 49 RELATIVE HUMIDITY (MIN. %) 22 17 19 10 9 10 10 8 11 11 16 39 15 RELATIVE HUMIDITY (MEAN% 03UTC) 70 63 63 39 32 28 28 26 31 39 54 82 46 RELATIVE HUMIDITY (MEAN% 09UTC) 28 22 26 11 12 12 12 10 13 14 20 48 19 RELATIVE HUMIDITY (MEAN% 15UTC) 35 27 25 13 13 13 12 11 15 17 26 57 22 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 1.8 11.0 11.8 0.0 2.0 1.2 0.0 0.1 0.0 0.0 0.8 73.4 102.1 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 3 3 DAYS WITH PRECIPITATION >= 5 0 1 1 0 0 0 0 0 0 0 0 4 6 DAYS WITH PRECIPITATION >= 1 1 2 3 0 1 1 0 0 0 0 0 7 15 DAYS WITH PRECIPITATION 2 2 6 0 1 2 0 1 0 0 2 8 24 GREATEST DAILY PRECIPITATION 1.0 7.0 6.0 0.0 2.0 1.0 0.0 0.1 0.0 0.0 0.6 23.0 23.0 DAY 28 11 15 ** 4 14 ** 13 ** ** 18 13 DAY WITH THUNDER STORM 0 0 1 0 0 1 0 0 0 0 0 2 4 DAYS WITH SNOW OR SLEET 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 1 1 2 0 4 0 0 0 0 0 2 0 10 WIND DIRECTION (PREVAILING) 225 225 225 270 270 45 360 360 45 225 225 180 45 PREVAILING WIND SPEED(KNOTS) 9.3 12.3 9.5 9.8 9.5 9.0 12.8 12.2 7.7 8.3 9.1 8.7 8.1 PREVAILING WIND PERCENT 9.3 9.8 13.7 18.3 19.0 11.7 22.6 28.6 12.5 8.9 11.3 9.7 9.2 CALMS PERCENT OF WIND 67.7 52.2 51.2 50.0 49.6 42.9 25.8 28.2 48.8 61.7 59.2 64.9 50.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 186 225 233 266 264 36 36 19 352 310 208 185 312 VECTOR WIND MAGNITUDE(KNOTS) 1.1 1.1 1.2 1.7 2.2 1.0 2.3 4.7 0.4 0.8 1.2 0.9 0.4 WIND STEADINESES (MEAN %) 42.3 24.4 28.6 40.5 45.8 20.4 31.5 66.2 9.8 23.5 34.3 32.1 9.1 WIND SPEED (MEAN KNOTS) 2.6 4.5 4.2 4.2 4.8 4.9 7.3 7.1 4.1 3.4 3.5 2.8 4.4 FASTEST WIND DIRECTION 240 230 240 270 30 30 360 20 30 20 220 180 230 FASTEST WIND SPEED (KNOTS) 23 33 23 19 29 23 27 23 19 23 27 16 33 DAY 27 21 10 26 27 2 24 13 18 9 18 5 DAYS WITH SKY CLEAR (0-2)/8 22 18 18 21 25 25 24 30 26 29 21 14 273 DAYS WITH P.CLOUDY (3-6)/8 7 9 11 9 5 5 7 1 4 2 8 7 75 DAYS WITH CLOUDY (7-8)/8 2 1 2 0 1 0 0 0 0 0 1 10 17 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 0 1 DURATION OF SUNSHINE HOURS 261.1 235.9 281.9 311.9 336.8 347.3 321.9 365.1 290.7 317.8 253.5 183.3 3507.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.2 814.2 814.0 814.3 812.5 809.6 809.4 812.7 814.6 817.4 817.4 818.6 814.2 MAX. QFE PRESSURE IN HPA 820.0 820.0 822.0 821.4 817.6 815.9 815.0 816.9 820.2 822.0 822.7 823.3 823.3 DAY-HOUR 14- 6 10- 6 2- 6 5- 6 13- 6 3- 6 29- 6 15- 6 23- 6 11- 6 5- 6 18- 6 MIN. QFE PRESSURE IN HPA 808.2 806.5 804.5 809.2 805.9 804.8 804.0 808.3 810.0 813.3 811.0 811.9 804.0 DAY-HOUR 27-15 21-12 26- 0 13-12 25-15 11-15 13-12 28-15 5-15 1-12 17-12 5-12 MEAN QNH PRESSURE IN HPA 1017.4 1016.2 1016.0 1016.3 1014.2 1010.7 1010.5 1014.5 1016.7 1020.1 1020.1 1021.5 1016.2 MAX. QNH PRESSURE IN HPA 1023.2 1023.2 1025.6 1024.9 1020.3 1018.3 1017.2 1019.5 1023.4 1025.6 1026.4 1027.1 1027.1 DAY-HOUR 14- 6 10- 6 2- 6 5- 6 13- 6 3- 6 29- 6 15- 6 23- 6 11- 6 5- 6 18- 6 MIN. QNH PRESSURE IN HPA 1009.1 1007.0 1004.6 1010.3 1006.3 1005.0 1004.0 1009.2 1011.2 1015.2 1012.4 1013.5 1004.0 DAY-HOUR 27-15 21-12 26- 0 13-12 25-15 11-15 13-12 28-15 5-15 1-12 17-12 5-12 MEAN QFF PRESSURE IN HPA 1017.6 1014.6 1009.5 1005.5 999.3 993.0 990.7 996.8 1001.8 1009.5 1015.1 1017.2 1005.9 MAX. QFF PRESSURE IN HPA 1030.3 1025.5 1019.7 1014.4 1007.0 1001.5 1000.3 1005.0 1013.0 1017.8 1024.7 1026.2 1030.3 DAY-HOUR 29- 6 13- 3 1- 6 1- 6 5- 3 3- 3 31- 3 15- 3 23- 3 11- 3 21- 3 18- 6 MIN. QFF PRESSURE IN HPA 1006.5 999.1 997.7 999.4 990.3 987.6 983.1 990.9 993.8 999.6 1004.9 1007.3 983.1 DAY-HOUR 27-12 21-12 26- 0 13-12 25-15 29-15 11-12 29-12 1-12 1-12 11-21 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 814.9 813.6 813.9 814.1 812.3 809.4 809.3 812.6 814.4 817.2 817.2 818.4 813.9 MAX. QFE PRESSURE IN HPA 818.1 818.0 820.1 818.8 815.7 813.6 813.0 815.3 818.6 820.0 820.7 821.8 821.8 DAY 15 10 2 5 13 3 28 15 23 10 4 18 MIN. QFE PRESSURE IN HPA 811.0 808.3 804.5 809.9 806.6 805.8 806.0 809.6 811.0 814.4 813.1 814.3 804.5 DAY 27 22 26 18 26 18 11 28 6 1 12 5 MEAN QNH PRESSURE IN HPA 1017.1 1015.6 1015.8 1016.1 1013.9 1010.5 1010.4 1014.4 1016.5 1019.9 1019.9 1021.2 1016.0 MAX. QNH PRESSURE IN HPA 1020.9 1020.8 1023.3 1021.8 1018.1 1015.5 1014.8 1017.6 1021.5 1023.2 1024.0 1025.4 1025.4 DAY 15 10 2 5 13 3 28 15 23 10 4 18 MIN. QNH PRESSURE IN HPA 1012.4 1009.2 1004.6 1011.1 1007.2 1006.2 1006.4 1010.7 1012.4 1016.5 1014.9 1016.4 1004.6 DAY 27 22 26 18 26 18 11 28 6 1 12 5 MEAN QFF PRESSURE IN HPA 1016.3 1013.4 1009.1 1005.4 999.4 993.0 990.7 996.7 1001.5 1008.9 1014.2 1016.4 1005.4 MAX. QFF PRESSURE IN HPA 1026.9 1021.2 1015.9 1011.9 1005.0 998.3 998.0 1001.9 1009.3 1013.1 1019.9 1023.5 1026.9 DAY 30 1 2 3 12 3 27 15 23 12 21 18 MIN. QFF PRESSURE IN HPA 1007.9 1002.1 997.7 999.5 991.1 988.7 984.7 992.1 995.4 1000.7 1007.4 1009.0 984.7 DAY 27 21 26 18 27 18 11 29 1 1 12 6 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.5 814.5 814.6 815.0 813.3 810.6 810.3 813.7 815.4 818.1 817.9 818.8 814.8 MAX. QFE PRESSURE IN HPA 818.9 819.0 821.0 820.0 816.3 815.2 813.9 816.5 819.6 821.0 821.7 822.2 822.2 DAY 15 10 2 5 12 3 29 15 23 10 5 29 MIN. QFE PRESSURE IN HPA 811.0 808.8 805.8 810.8 807.7 807.7 807.0 810.7 812.1 814.9 813.3 814.7 805.8 DAY 27 22 26 10 26 12 11 28 6 1 12 5 MEAN QNH PRESSURE IN HPA 1017.8 1016.6 1016.8 1017.2 1015.2 1011.9 1011.6 1015.7 1017.7 1020.9 1020.7 1021.8 1017.0 MAX. QNH PRESSURE IN HPA 1021.9 1022.0 1024.4 1023.2 1018.8 1017.5 1015.9 1019.0 1022.7 1024.4 1025.2 1025.8 1025.8 DAY 15 10 2 5 12 3 29 15 23 10 5 29 MIN. QNH PRESSURE IN HPA 1012.4 1009.8 1006.2 1012.2 1008.5 1008.5 1007.6 1012.1 1013.7 1017.1 1015.2 1016.9 1006.2 DAY 27 22 26 10 26 12 11 28 6 1 12 5 MEAN QFF PRESSURE IN HPA 1019.4 1016.5 1011.3 1007.5 1000.9 994.8 992.5 999.1 1004.2 1012.0 1017.5 1018.8 1007.9 MAX. QFF PRESSURE IN HPA 1029.6 1025.5 1019.5 1013.6 1007.0 1001.5 1000.3 1005.0 1013.0 1017.8 1024.7 1025.8 1029.6 DAY 30 13 2 1 5 3 31 15 23 11 21 18 MIN. QFF PRESSURE IN HPA 1009.1 1004.5 1000.8 1002.2 993.0 990.2 986.3 994.5 997.6 1003.3 1009.2 1011.3 986.3 DAY 27 21 26 18 26 12 12 29 1 1 12 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.7 815.7 815.7 816.1 814.0 811.1 810.8 814.2 816.3 819.2 819.1 820.0 815.7 MAX. QFE PRESSURE IN HPA 820.0 820.0 822.0 821.4 817.6 815.9 815.0 816.9 820.2 822.0 822.7 823.3 823.3 DAY 14 10 2 5 13 3 29 15 23 11 5 18 MIN. QFE PRESSURE IN HPA 811.4 810.1 806.8 812.0 808.8 808.3 807.3 811.6 813.4 816.2 814.7 815.2 806.8 DAY 27 22 26 10 26 18 12 27 6 1 12 5 MEAN QNH PRESSURE IN HPA 1019.2 1018.1 1018.1 1018.5 1016.1 1012.5 1012.2 1016.3 1018.8 1022.3 1022.1 1023.2 1018.1 MAX. QNH PRESSURE IN HPA 1023.2 1023.2 1025.6 1024.9 1020.3 1018.3 1017.2 1019.5 1023.4 1025.6 1026.4 1027.1 1027.1 DAY 14 10 2 5 13 3 29 15 23 11 5 18 MIN. QNH PRESSURE IN HPA 1012.9 1011.3 1007.4 1013.6 1009.8 1009.2 1008.0 1013.1 1015.3 1018.6 1016.9 1017.5 1007.4 DAY 27 22 26 10 26 18 12 27 6 1 12 5 MEAN QFF PRESSURE IN HPA 1019.8 1016.4 1011.4 1007.1 1000.5 994.6 992.2 998.1 1003.4 1011.3 1016.6 1018.9 1007.5 MAX. QFF PRESSURE IN HPA 1030.3 1023.7 1019.7 1014.4 1006.4 1000.2 1000.3 1003.3 1011.2 1015.7 1022.3 1026.2 1030.3 DAY 29 13 1 1 5 3 29 14 23 11 21 18 MIN. QFF PRESSURE IN HPA 1010.5 1004.6 1001.2 1002.1 993.5 990.5 985.7 994.5 998.6 1003.3 1008.9 1011.7 985.7 DAY 27 21 26 10 26 30 12 27 1 1 12 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.3 814.6 814.4 814.8 813.0 809.9 809.6 813.0 815.0 817.7 817.4 818.6 814.4 MAX. QFE PRESSURE IN HPA 818.9 819.0 820.4 819.8 816.2 814.4 813.6 815.6 818.7 820.8 821.3 821.8 821.8 DAY 15 28 1 5 13 3 29 14 22 10 2 9 MIN. QFE PRESSURE IN HPA 809.8 808.6 805.8 810.8 807.6 807.3 806.2 810.2 812.0 814.8 812.8 813.7 805.8 DAY 27 21 26 10 26 18 12 27 1 1 18 5 MEAN QNH PRESSURE IN HPA 1017.6 1016.7 1016.5 1017.0 1014.8 1011.2 1010.7 1014.8 1017.2 1020.4 1020.1 1021.5 1016.5 MAX. QNH PRESSURE IN HPA 1021.9 1022.0 1023.7 1023.0 1018.6 1016.5 1015.5 1017.9 1021.6 1024.2 1024.8 1025.4 1025.4 DAY 15 28 1 5 13 3 29 14 22 10 2 9 MIN. QNH PRESSURE IN HPA 1011.0 1009.5 1006.2 1012.2 1008.4 1008.0 1006.7 1011.5 1013.6 1017.0 1014.6 1015.7 1006.2 DAY 27 21 26 10 26 18 12 27 1 1 18 5 MEAN QFF PRESSURE IN HPA 1016.9 1014.5 1009.5 1005.6 999.5 993.1 990.6 996.5 1001.3 1008.7 1014.2 1016.5 1005.6 MAX. QFF PRESSURE IN HPA 1026.6 1022.0 1017.8 1011.9 1004.9 998.3 999.2 1001.1 1008.8 1012.0 1020.1 1022.6 1026.6 DAY 29 13 1 1 5 1 29 14 23 16 21 18 MIN. QFF PRESSURE IN HPA 1007.5 1002.8 999.3 1000.2 992.7 988.9 984.4 992.6 995.4 1000.8 1005.6 1008.8 984.4 DAY 27 21 26 13 26 10 12 24 1 1 12 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.9 813.0 812.8 813.1 811.5 808.5 808.1 811.5 813.3 816.1 816.1 817.5 812.9 MAX. QFE PRESSURE IN HPA 817.3 817.5 818.4 818.1 814.5 813.2 812.0 814.4 817.3 819.6 820.0 820.8 820.8 DAY 14 28 1 4 12 3 29 14 22 10 2 8 MIN. QFE PRESSURE IN HPA 808.6 806.5 805.0 809.2 806.3 805.4 804.0 808.7 810.5 813.3 811.0 811.9 804.0 DAY 27 21 26 13 25 17 13 27 5 1 17 5 MEAN QNH PRESSURE IN HPA 1015.9 1014.8 1014.5 1014.9 1013.0 1009.5 1009.0 1013.0 1015.2 1018.5 1018.5 1020.2 1014.8 MAX. QNH PRESSURE IN HPA 1020.0 1020.2 1021.3 1020.9 1016.6 1015.1 1013.6 1016.5 1020.0 1022.7 1023.2 1024.2 1024.2 DAY 14 28 1 4 12 3 29 14 22 10 2 8 MIN. QNH PRESSURE IN HPA 1009.5 1007.0 1005.2 1010.3 1006.8 1005.7 1004.0 1009.7 1011.8 1015.2 1012.4 1013.5 1004.0 DAY 27 21 26 13 25 17 13 27 5 1 17 5 MEAN QFF PRESSURE IN HPA 1015.1 1012.6 1007.7 1004.2 998.4 991.9 989.4 995.4 1000.2 1007.5 1012.9 1015.3 1004.2 MAX. QFF PRESSURE IN HPA 1024.7 1018.5 1014.0 1010.4 1003.5 997.4 996.6 1000.5 1007.8 1012.2 1018.8 1020.8 1024.7 DAY 29 9 1 4 12 3 26 15 22 10 20 18 MIN. QFF PRESSURE IN HPA 1006.5 999.1 998.8 999.4 991.3 988.3 983.1 990.9 993.8 999.6 1006.7 1007.3 983.1 DAY 27 21 26 13 25 17 11 29 1 1 17 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.5 813.4 812.9 813.1 811.3 808.4 808.1 811.6 813.4 816.4 816.8 818.2 813.2 MAX. QFE PRESSURE IN HPA 818.0 818.0 818.4 817.9 814.8 812.9 812.2 815.2 818.9 820.3 820.5 821.2 821.2 DAY 15 9 1 1 12 3 29 14 22 10 5 17 MIN. QFE PRESSURE IN HPA 808.2 807.1 805.7 809.2 805.9 804.8 804.0 808.3 810.0 813.5 812.3 814.1 804.0 DAY 27 21 26 13 25 11 13 28 5 2 17 5 MEAN QNH PRESSURE IN HPA 1016.6 1015.3 1014.7 1014.9 1012.8 1009.3 1008.9 1013.1 1015.3 1018.9 1019.3 1021.0 1015.0 MAX. QNH PRESSURE IN HPA 1020.8 1020.8 1021.3 1020.7 1017.0 1014.7 1013.9 1017.5 1021.9 1023.6 1023.8 1024.6 1024.6 DAY 15 9 1 1 12 3 29 14 22 10 5 17 MIN. QNH PRESSURE IN HPA 1009.1 1007.8 1006.1 1010.3 1006.3 1005.0 1004.0 1009.2 1011.2 1015.4 1014.0 1016.1 1004.0 DAY 27 21 26 13 25 11 13 28 5 2 17 5 MEAN QFF PRESSURE IN HPA 1018.2 1015.0 1009.2 1005.1 998.4 992.2 990.0 996.5 1001.8 1009.9 1016.1 1018.0 1005.9 MAX. QFF PRESSURE IN HPA 1028.6 1021.9 1016.1 1012.0 1003.6 998.7 998.0 1001.9 1011.9 1014.8 1023.5 1024.6 1028.6 DAY 29 9 1 2 5 3 31 14 22 10 21 17 MIN. QFF PRESSURE IN HPA 1007.5 1001.7 1000.6 1000.2 990.3 987.6 983.7 991.5 995.9 1002.6 1008.9 1010.8 983.7 DAY 27 21 25 17 25 29 9 28 6 1 11 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 815.4 814.3 814.0 814.1 812.4 809.3 809.2 812.7 814.5 817.3 817.7 819.0 814.2 MAX. QFE PRESSURE IN HPA 818.7 819.3 819.7 819.0 815.7 813.8 813.4 816.0 819.6 820.9 821.0 822.8 822.8 DAY 14 9 1 4 12 3 27 14 22 10 2 8 MIN. QFE PRESSURE IN HPA 808.6 808.3 806.7 810.3 806.6 806.0 805.2 809.6 811.0 814.6 813.2 814.5 805.2 DAY 27 21 25 13 25 11 11 27 5 1 17 5 MEAN QNH PRESSURE IN HPA 1017.7 1016.4 1016.0 1016.2 1014.1 1010.4 1010.3 1014.4 1016.6 1019.9 1020.5 1021.9 1016.2 MAX. QNH PRESSURE IN HPA 1021.6 1022.4 1022.8 1022.0 1018.1 1015.8 1015.3 1018.4 1022.7 1024.3 1024.4 1026.5 1026.5 DAY 14 9 1 4 12 3 27 14 22 10 2 8 MIN. QNH PRESSURE IN HPA 1009.5 1009.2 1007.3 1011.6 1007.2 1006.4 1005.5 1010.7 1012.4 1016.7 1015.1 1016.6 1005.5 DAY 27 21 25 13 25 11 11 27 5 1 17 5 MEAN QFF PRESSURE IN HPA 1018.3 1014.6 1009.2 1004.7 998.5 992.4 990.3 996.4 1001.3 1009.1 1015.1 1017.6 1005.6 MAX. QFF PRESSURE IN HPA 1030.0 1022.9 1015.8 1011.0 1003.8 998.2 997.8 1002.9 1010.6 1013.2 1021.3 1024.4 1030.0 DAY 29 13 3 4 4 3 28 14 22 10 20 17 MIN. QFF PRESSURE IN HPA 1008.6 1003.4 999.7 1000.3 990.5 987.8 983.4 992.5 996.3 1002.9 1006.7 1009.6 983.4 DAY 27 21 25 17 26 11 11 27 5 2 11 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 815.2 814.1 814.0 814.1 812.4 809.4 809.5 812.7 814.5 817.3 817.5 818.6 814.1 MAX. QFE PRESSURE IN HPA 818.7 819.3 820.1 819.0 815.7 814.0 813.4 816.0 818.9 820.9 820.7 821.8 821.8 DAY 15 9 1 4 12 2 27 14 22 10 14 17 MIN. QFE PRESSURE IN HPA 808.6 808.3 805.4 810.3 806.6 806.0 806.0 809.6 811.0 814.6 813.1 814.4 805.4 DAY 27 21 25 17 25 11 10 27 5 1 11 11 MEAN QNH PRESSURE IN HPA 1017.5 1016.2 1016.0 1016.1 1014.1 1010.5 1010.6 1014.5 1016.6 1019.9 1020.2 1021.6 1016.1 MAX. QNH PRESSURE IN HPA 1021.6 1022.4 1023.3 1022.0 1018.1 1016.0 1015.3 1018.4 1021.9 1024.3 1024.0 1025.4 1025.4 DAY 15 9 1 4 12 2 27 14 22 10 14 17 MIN. QNH PRESSURE IN HPA 1009.5 1009.2 1005.7 1011.6 1007.2 1006.4 1006.4 1010.7 1012.4 1016.7 1014.9 1016.5 1005.7 DAY 27 21 25 17 25 11 10 27 5 1 11 11 MEAN QFF PRESSURE IN HPA 1016.9 1013.7 1008.9 1004.6 998.7 992.3 990.4 996.2 1000.8 1008.3 1014.4 1016.6 1005.1 MAX. QFF PRESSURE IN HPA 1028.0 1022.0 1017.0 1010.9 1004.2 997.7 998.1 1001.9 1009.2 1012.4 1021.6 1023.8 1028.0 DAY 29 13 1 4 4 2 28 14 22 11 20 17 MIN. QFF PRESSURE IN HPA 1008.6 1004.8 998.3 999.4 990.6 988.1 984.2 991.6 995.5 1002.1 1004.9 1008.4 984.2 DAY 27 21 25 12 26 9 10 28 11 2 11 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.5 6.1 10.6 14.9 21.2 25.6 28.4 27.7 23.5 17.1 8.9 5.0 16.0 MINIMUN AIR TEMPERATURE (C) -3.0 -1.3 2.4 6.3 9.6 14.8 19.0 17.9 12.9 6.9 0.4 -2.3 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 8 2 0 0 0 0 11 DAYS WITH MINIMUM TEMP. <=-4 14 12 3 0 0 0 0 0 0 0 5 12 46 DAYS WITH FREEZING MIN.<= 0 22 18 7 1 0 0 0 0 0 0 15 20 83 TEMPERATURE RECORDS LOWEST(C) -10.4 -10.6 -4.0 0.0 3.4 9.6 12.6 13.0 9.0 1.6 -7.0 -15.8 -15.8 DAY 27 2 8 24 7 5 26 6 29 29 23 23 MAXIMUM AIR TEMPERATURE (C) 10.6 13.9 19.0 22.7 30.3 34.1 35.8 35.5 32.4 26.4 17.6 12.7 24.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 18 30 31 31 27 1 0 0 140 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.0 18.2 24.0 30.5 33.4 36.6 38.4 38.0 35.0 30.0 22.4 17.0 38.4 DAY 1 13 14 28 19 6 18 8 6 5 11 11 DIF. BETWEEN (MAX.-MIN.) (C) 13.6 15.2 16.6 16.4 20.7 19.3 16.8 17.6 19.5 19.5 17.2 15.0 17.3 MEAN DAILY TEMP. (MDT) (C) 3.8 6.3 10.7 14.5 20.0 24.4 27.4 26.7 22.7 16.6 9.0 5.2 15.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 14.6 103.2 198.5 176.5 56.2 0.1 0.0 0.0 549.1 HEATING DEG. DAYS(BASE 18 0C) 439.7 328.2 226.0 111.6 8.1 0.0 0.0 0.0 0.0 53.1 270.4 395.8 1832.9 DEWPOINT (MEAN C) -5.2 -6.4 -5.4 -0.3 -4.2 -2.1 0.9 1.4 -2.4 -6.4 -3.6 -5.3 -3.3 MIXING RATIO (G/KG) 3.45 3.26 3.54 4.85 3.63 4.18 5.13 5.43 4.19 2.98 3.80 3.49 3.99 VAPOUR PRESSURE (HPA) 4.49 4.24 4.60 6.28 4.71 5.41 6.64 7.01 5.46 3.90 4.96 4.54 5.19 SATURATION DEF. (HPA) 3.95 5.88 9.11 12.06 22.57 29.31 33.74 31.91 25.50 17.30 7.43 4.90 16.97 RELATIVE HUMIDITY (MEAN %) 58 47 40 42 22 18 18 20 19 21 45 52 34 RELATIVE HUMIDITY (MAX. %) 82 74 70 72 39 30 29 32 31 34 70 76 53 RELATIVE HUMIDITY (MIN. %) 31 22 16 19 9 10 11 12 11 12 26 29 17 RELATIVE HUMIDITY (MEAN% 03UTC) 77 71 64 68 37 27 27 31 31 33 67 74 51 RELATIVE HUMIDITY (MEAN% 09UTC) 38 31 21 24 11 11 13 14 13 14 30 35 21 RELATIVE HUMIDITY (MEAN% 15UTC) 48 32 27 28 12 12 13 14 14 16 36 42 25 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 25.2 22.6 17.3 32.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.6 103.3 DAYS WITH PRECIPITATION >=10 1 0 0 2 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 1 3 1 2 0 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 1 5 4 4 4 0 0 0 0 0 0 1 2 20 DAYS WITH PRECIPITATION 6 6 4 4 0 0 0 0 0 0 2 3 25 GREATEST DAILY PRECIPITATION 17.0 9.0 9.0 19.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 3.4 19.0 DAY 12 20 21 12 ** ** ** ** ** ** 2 2 DAY WITH THUNDER STORM 0 0 0 2 0 1 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 1 3 4 1 1 0 0 0 0 0 1 13 WIND DIRECTION (PREVAILING) 225 225 225 225 270 225 45 45 45 45 270 225 225 PREVAILING WIND SPEED(KNOTS) 8.8 9.5 10.1 9.8 10.5 8.3 9.0 8.8 8.3 7.3 8.8 9.5 8.9 PREVAILING WIND PERCENT 11.7 15.2 14.1 15.8 21.4 12.9 19.8 23.0 16.7 16.9 9.2 16.9 10.9 CALMS PERCENT OF WIND 47.2 40.2 43.1 45.8 50.4 42.5 35.5 21.0 46.7 56.9 60.8 48.0 44.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 198 242 212 256 260 293 42 57 32 5 248 212 266 VECTOR WIND MAGNITUDE(KNOTS) 1.7 1.2 1.2 3.0 3.2 1.1 1.8 2.7 2.1 0.7 0.7 1.6 0.5 WIND STEADINESES (MEAN %) 36.2 22.6 22.6 60.0 66.7 20.0 31.6 38.6 45.7 21.9 24.1 34.8 10.2 WIND SPEED (MEAN KNOTS) 4.7 5.3 5.3 5.0 4.8 5.5 5.7 7.0 4.6 3.2 2.9 4.6 4.9 FASTEST WIND DIRECTION 190 360 30 210 230 30 30 60 360 300 270 240 190 FASTEST WIND SPEED (KNOTS) 31 27 27 27 27 27 19 23 19 23 16 27 31 DAY 11 4 6 3 4 22 7 14 3 16 6 22 DAYS WITH SKY CLEAR (0-2)/8 20 15 16 17 27 27 26 29 30 31 19 18 275 DAYS WITH P.CLOUDY (3-6)/8 7 7 10 10 3 3 5 2 0 0 11 12 70 DAYS WITH CLOUDY (7-8)/8 4 6 5 3 1 0 0 0 0 0 0 1 20 DAYS WITH VISIBILITY =< 2 KM 1 0 0 1 0 0 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 236.0 208.4 266.5 274.9 353.6 353.1 314.9 334.2 324.1 307.9 243.3 225.5 3442.4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.4 815.8 815.0 813.5 813.4 811.3 810.8 811.0 815.5 817.8 817.5 815.5 814.4 MAX. QFE PRESSURE IN HPA 821.3 822.3 824.0 820.0 819.0 815.8 815.1 815.6 820.2 822.7 823.5 822.1 824.0 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 10- 6 5- 6 31- 6 31- 6 21- 6 10- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 808.6 809.3 810.0 805.0 809.0 805.7 807.3 806.2 811.1 814.5 812.9 807.6 805.0 DAY-HOUR 22-12 20-12 22-12 4- 0 13-12 20-12 27-15 17-15 10-12 21-12 26-12 22-12 MEAN QNH PRESSURE IN HPA 1017.7 1018.2 1017.2 1015.4 1015.2 1012.7 1012.2 1012.4 1017.8 1020.5 1020.2 1017.8 1016.4 MAX. QNH PRESSURE IN HPA 1024.8 1025.9 1028.0 1023.2 1022.0 1018.2 1017.3 1017.9 1023.4 1026.4 1027.4 1025.7 1028.0 DAY-HOUR 26- 6 6- 6 11- 6 1- 6 10- 6 5- 6 31- 6 31- 6 21- 6 10- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 1009.5 1010.4 1011.2 1005.2 1010.0 1006.1 1008.0 1006.7 1012.5 1016.6 1014.7 1008.4 1005.2 DAY-HOUR 22-12 20-12 22-12 4- 0 13-12 20-12 27-15 17-15 10-12 21-12 26-12 22-12 MEAN QFF PRESSURE IN HPA 1016.9 1015.6 1011.0 1005.9 1001.3 995.7 993.1 993.8 1002.2 1009.8 1015.4 1016.0 1006.4 MAX. QFF PRESSURE IN HPA 1027.8 1029.1 1025.5 1015.1 1008.0 1003.2 1000.6 1001.3 1011.4 1015.7 1025.6 1027.0 1029.1 DAY-HOUR 26- 6 2- 3 11- 3 1- 3 16- 6 5- 3 31- 6 2- 3 30- 3 26- 3 19- 3 30- 3 MIN. QFF PRESSURE IN HPA 1005.6 1006.3 1003.4 996.1 993.9 988.9 988.5 987.7 993.7 1003.8 1004.8 1002.5 987.7 DAY-HOUR 11-18 20-12 21-21 4- 0 20-12 15-21 22- 9 7-12 5-21 14-21 7- 0 22-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 815.3 815.6 814.6 813.2 813.0 811.0 810.5 810.9 815.2 817.6 817.5 815.3 814.1 MAX. QFE PRESSURE IN HPA 819.5 820.4 821.0 817.6 816.5 813.9 813.4 813.8 818.2 820.5 821.7 820.0 821.7 DAY 28 6 13 2 10 5 31 30 21 11 19 3 MIN. QFE PRESSURE IN HPA 809.4 812.6 811.3 805.0 810.3 806.8 808.0 808.0 812.0 815.7 813.0 808.8 805.0 DAY 22 4 22 4 13 22 23 18 6 29 7 25 MEAN QNH PRESSURE IN HPA 1017.6 1018.0 1016.8 1015.1 1014.8 1012.4 1011.8 1012.3 1017.4 1020.3 1020.2 1017.6 1016.2 MAX. QNH PRESSURE IN HPA 1022.6 1023.7 1024.4 1020.3 1019.0 1015.9 1015.3 1015.8 1021.0 1023.8 1025.2 1023.2 1025.2 DAY 28 6 13 2 10 5 31 30 21 11 19 3 MIN. QNH PRESSURE IN HPA 1010.5 1014.3 1012.8 1005.2 1011.6 1007.4 1008.8 1008.8 1013.6 1018.1 1014.8 1009.8 1005.2 DAY 22 4 22 4 13 22 23 18 6 29 7 25 MEAN QFF PRESSURE IN HPA 1016.0 1014.9 1010.3 1005.5 1001.3 995.7 993.0 993.9 1001.8 1009.4 1014.8 1015.1 1006.0 MAX. QFF PRESSURE IN HPA 1024.9 1025.8 1021.7 1012.4 1006.6 1001.6 998.5 1001.0 1007.4 1012.3 1022.2 1023.2 1025.8 DAY 27 2 12 1 9 5 31 1 30 31 19 30 MIN. QFF PRESSURE IN HPA 1008.9 1006.4 1004.2 996.1 994.5 991.2 989.4 989.0 994.8 1004.8 1004.8 1003.2 989.0 DAY 12 25 28 4 21 20 7 18 6 15 7 22 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.6 816.2 815.5 814.1 814.1 812.2 811.7 811.9 816.3 818.4 818.1 815.8 815.0 MAX. QFE PRESSURE IN HPA 819.8 821.4 822.5 818.6 817.8 815.3 814.5 814.9 819.7 821.8 822.4 820.4 822.5 DAY 28 6 11 1 10 5 31 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 809.4 812.8 812.0 805.4 811.1 807.7 809.2 809.2 813.4 816.1 814.0 809.0 805.4 DAY 22 4 22 4 13 21 23 17 18 30 7 25 MEAN QNH PRESSURE IN HPA 1017.9 1018.6 1017.8 1016.1 1016.2 1013.8 1013.2 1013.5 1018.7 1021.2 1020.9 1018.1 1017.2 MAX. QNH PRESSURE IN HPA 1023.0 1024.9 1026.2 1021.5 1020.6 1017.6 1016.6 1017.1 1022.8 1025.4 1026.1 1023.7 1026.2 DAY 28 6 11 1 10 5 31 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1010.5 1014.6 1013.6 1005.7 1012.5 1008.5 1010.3 1010.3 1015.3 1018.5 1016.0 1010.0 1005.7 DAY 22 4 22 4 13 21 23 17 18 30 7 25 MEAN QFF PRESSURE IN HPA 1018.4 1017.3 1012.9 1007.5 1002.9 997.4 994.8 995.8 1004.8 1012.3 1017.8 1017.7 1008.3 MAX. QFF PRESSURE IN HPA 1027.5 1029.1 1025.5 1015.1 1007.2 1003.2 1000.0 1001.3 1011.4 1015.7 1025.6 1027.0 1029.1 DAY 25 2 11 1 10 5 31 2 30 26 19 30 MIN. QFF PRESSURE IN HPA 1007.1 1008.6 1006.7 1000.7 997.7 992.2 991.1 990.8 997.5 1007.8 1009.7 1004.6 990.8 DAY 12 25 28 21 20 20 7 18 6 15 7 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.9 817.4 816.5 815.0 814.9 812.9 812.4 812.5 817.1 819.5 819.1 817.1 815.9 MAX. QFE PRESSURE IN HPA 821.3 822.3 824.0 820.0 819.0 815.8 815.1 815.6 820.2 822.7 823.5 822.1 824.0 DAY 26 6 11 1 10 5 31 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 811.0 813.6 813.4 805.6 812.0 808.2 809.8 809.5 813.8 817.5 815.6 810.2 805.6 DAY 22 4 29 4 13 21 23 17 10 29 7 22 MEAN QNH PRESSURE IN HPA 1019.5 1020.0 1019.1 1017.2 1017.1 1014.7 1014.1 1014.2 1019.7 1022.6 1022.1 1019.7 1018.3 MAX. QNH PRESSURE IN HPA 1024.8 1025.9 1028.0 1023.2 1022.0 1018.2 1017.3 1017.9 1023.4 1026.4 1027.4 1025.7 1028.0 DAY 26 6 11 1 10 5 31 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1012.4 1015.5 1015.3 1006.0 1013.6 1009.1 1011.0 1010.6 1015.8 1020.2 1017.9 1011.5 1006.0 DAY 22 4 29 4 13 21 23 17 10 29 7 22 MEAN QFF PRESSURE IN HPA 1019.1 1017.7 1012.7 1007.2 1002.5 997.2 994.6 995.1 1003.5 1011.0 1016.9 1017.8 1007.9 MAX. QFF PRESSURE IN HPA 1027.8 1028.1 1025.4 1014.7 1008.0 1002.3 1000.6 1000.3 1009.5 1015.2 1023.9 1026.8 1028.1 DAY 26 5 11 1 16 5 31 1 30 27 18 30 MIN. QFF PRESSURE IN HPA 1009.6 1011.5 1007.1 999.5 997.6 991.3 991.0 991.1 998.0 1007.7 1010.3 1006.0 991.0 DAY 12 28 29 21 21 20 23 18 7 13 13 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.4 816.0 815.2 813.9 813.7 811.8 811.2 811.3 815.7 818.0 817.6 815.5 814.6 MAX. QFE PRESSURE IN HPA 820.0 821.3 822.8 819.6 817.9 815.0 813.7 814.3 819.0 821.2 822.1 821.0 822.8 DAY 25 6 11 1 10 5 31 31 21 10 18 14 MIN. QFE PRESSURE IN HPA 809.6 812.1 811.8 806.6 811.0 807.4 808.9 808.2 812.4 815.9 814.0 808.0 806.6 DAY 22 20 22 4 13 20 22 17 10 29 26 22 MEAN QNH PRESSURE IN HPA 1017.6 1018.4 1017.5 1015.8 1015.7 1013.4 1012.7 1012.8 1018.0 1020.8 1020.3 1017.8 1016.7 MAX. QNH PRESSURE IN HPA 1023.2 1024.8 1026.5 1022.7 1020.7 1017.2 1015.7 1016.4 1022.0 1024.6 1025.7 1024.4 1026.5 DAY 25 6 11 1 10 5 31 31 21 10 18 14 MIN. QNH PRESSURE IN HPA 1010.7 1013.7 1013.4 1007.2 1012.4 1008.1 1009.9 1009.1 1014.1 1018.3 1016.0 1008.8 1007.2 DAY 22 20 22 4 13 20 22 17 10 29 26 22 MEAN QFF PRESSURE IN HPA 1016.3 1015.1 1010.7 1005.9 1001.4 996.0 993.0 993.4 1001.4 1008.9 1014.4 1015.2 1006.0 MAX. QFF PRESSURE IN HPA 1025.3 1025.7 1022.8 1014.8 1007.0 1000.5 998.4 999.4 1006.8 1013.8 1021.3 1025.3 1025.7 DAY 26 6 11 1 9 5 31 1 30 31 18 30 MIN. QFF PRESSURE IN HPA 1007.9 1009.0 1004.5 997.4 995.9 990.7 988.5 989.6 995.5 1004.3 1008.1 1002.5 988.5 DAY 11 26 29 21 21 19 22 7 6 15 13 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 814.1 814.3 813.7 812.3 812.4 810.4 810.0 809.7 814.3 816.6 816.1 814.2 813.2 MAX. QFE PRESSURE IN HPA 818.6 820.0 820.5 818.0 815.4 813.6 812.7 812.8 817.8 819.9 820.7 819.8 820.7 DAY 26 6 11 1 9 5 31 29 23 10 18 14 MIN. QFE PRESSURE IN HPA 808.6 809.3 810.0 805.7 809.0 805.7 807.6 806.8 811.1 814.5 812.9 807.6 805.7 DAY 22 20 22 4 13 20 23 17 10 21 26 22 MEAN QNH PRESSURE IN HPA 1016.1 1016.4 1015.6 1014.0 1014.0 1011.7 1011.2 1010.9 1016.4 1019.1 1018.6 1016.3 1015.0 MAX. QNH PRESSURE IN HPA 1021.5 1023.2 1023.8 1020.8 1017.7 1015.5 1014.5 1014.6 1020.6 1023.1 1024.0 1023.0 1024.0 DAY 26 6 11 1 9 5 31 29 23 10 18 14 MIN. QNH PRESSURE IN HPA 1009.5 1010.4 1011.2 1006.1 1010.0 1006.1 1008.4 1007.4 1012.5 1016.6 1014.7 1008.4 1006.1 DAY 22 20 22 4 13 20 23 17 10 21 26 22 MEAN QFF PRESSURE IN HPA 1014.6 1013.3 1009.2 1004.5 1000.6 995.0 992.4 992.5 1000.7 1008.2 1013.2 1013.8 1004.8 MAX. QFF PRESSURE IN HPA 1022.3 1023.0 1020.5 1012.9 1006.1 1000.6 997.9 999.1 1006.6 1011.8 1021.3 1022.9 1023.0 DAY 26 6 11 1 9 5 31 1 30 31 18 30 MIN. QFF PRESSURE IN HPA 1006.6 1006.3 1003.7 996.6 993.9 989.3 988.8 987.7 995.2 1004.7 1007.0 1002.5 987.7 DAY 11 20 29 3 20 18 23 7 5 15 13 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.9 814.9 814.1 812.6 812.3 810.1 809.7 809.7 814.5 817.0 816.8 814.9 813.5 MAX. QFE PRESSURE IN HPA 819.5 820.3 820.7 818.3 815.1 813.6 813.2 812.8 818.3 820.5 820.7 820.0 820.7 DAY 26 6 11 1 9 5 31 1 23 10 18 14 MIN. QFE PRESSURE IN HPA 809.7 809.6 810.4 806.6 809.7 805.7 807.3 806.2 811.4 814.5 813.7 809.5 805.7 DAY 22 20 22 4 13 20 27 17 25 21 26 22 MEAN QNH PRESSURE IN HPA 1017.1 1017.1 1016.1 1014.3 1014.0 1011.4 1010.9 1010.9 1016.6 1019.6 1019.3 1017.1 1015.4 MAX. QNH PRESSURE IN HPA 1022.6 1023.6 1024.0 1021.2 1017.3 1015.5 1015.1 1014.6 1021.2 1023.8 1024.0 1023.2 1024.0 DAY 26 6 11 1 9 5 31 1 23 10 18 14 MIN. QNH PRESSURE IN HPA 1010.9 1010.7 1011.7 1007.2 1010.9 1006.1 1008.0 1006.7 1012.9 1016.6 1015.7 1010.6 1006.1 DAY 22 20 22 4 13 20 27 17 25 21 26 22 MEAN QFF PRESSURE IN HPA 1017.5 1015.7 1011.2 1005.7 1000.7 994.9 992.6 993.2 1002.6 1010.6 1016.3 1016.7 1006.5 MAX. QFF PRESSURE IN HPA 1026.3 1026.5 1023.1 1014.0 1005.8 1000.2 998.6 998.4 1009.7 1014.6 1023.4 1026.8 1026.8 DAY 26 2 11 1 9 5 31 1 29 26 18 30 MIN. QFF PRESSURE IN HPA 1006.9 1007.5 1004.8 998.6 994.5 989.4 989.5 988.2 995.9 1006.5 1010.0 1007.5 988.2 DAY 11 20 29 21 20 18 23 8 5 15 6 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 815.6 816.2 815.2 813.7 813.4 810.8 810.6 810.9 815.5 817.7 817.7 815.8 814.4 MAX. QFE PRESSURE IN HPA 820.4 821.0 821.5 819.0 816.8 814.2 813.9 813.7 818.8 821.2 822.0 820.4 822.0 DAY 26 6 11 1 9 5 31 30 23 10 18 14 MIN. QFE PRESSURE IN HPA 810.4 812.3 811.6 807.6 810.9 806.5 808.3 808.0 812.3 815.5 814.2 810.5 806.5 DAY 21 20 22 3 12 21 23 16 5 21 6 24 MEAN QNH PRESSURE IN HPA 1017.9 1018.6 1017.5 1015.7 1015.2 1012.2 1012.0 1012.3 1017.8 1020.5 1020.4 1018.1 1016.5 MAX. QNH PRESSURE IN HPA 1023.7 1024.4 1025.0 1022.0 1019.4 1016.3 1015.9 1015.7 1021.8 1024.6 1025.6 1023.7 1025.6 DAY 26 6 11 1 9 5 31 30 23 10 18 14 MIN. QNH PRESSURE IN HPA 1011.7 1014.0 1013.1 1008.4 1012.3 1007.0 1009.2 1008.8 1014.0 1017.8 1016.3 1011.8 1007.0 DAY 21 20 22 3 12 21 23 16 5 21 6 24 MEAN QFF PRESSURE IN HPA 1017.5 1016.2 1011.0 1005.6 1000.6 994.6 992.6 993.3 1001.8 1009.1 1015.3 1016.4 1006.2 MAX. QFF PRESSURE IN HPA 1027.5 1028.7 1024.5 1012.6 1006.3 999.6 999.3 999.2 1008.4 1013.4 1022.3 1026.7 1028.7 DAY 26 5 11 1 15 4 31 1 29 26 18 30 MIN. QFF PRESSURE IN HPA 1005.6 1010.7 1005.2 999.9 995.0 989.0 989.2 989.1 995.8 1005.9 1007.7 1006.8 989.0 DAY 11 13 21 3 20 19 22 17 5 13 6 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 815.4 816.0 815.2 813.6 813.2 811.0 810.7 811.0 815.3 817.6 817.6 815.5 814.3 MAX. QFE PRESSURE IN HPA 820.0 820.7 821.5 819.0 816.8 814.2 813.6 814.3 818.4 820.5 822.0 820.0 822.0 DAY 26 5 11 1 9 5 31 29 20 10 18 2 MIN. QFE PRESSURE IN HPA 809.8 812.8 811.3 805.7 810.9 806.9 808.3 808.0 812.0 815.5 813.6 808.8 805.7 DAY 21 20 21 3 5 20 26 16 5 21 6 24 MEAN QNH PRESSURE IN HPA 1017.7 1018.4 1017.4 1015.6 1015.1 1012.4 1012.0 1012.4 1017.6 1020.4 1020.3 1017.9 1016.4 MAX. QNH PRESSURE IN HPA 1023.2 1024.0 1025.0 1022.0 1019.4 1016.3 1015.5 1016.4 1021.3 1023.8 1025.6 1023.2 1025.6 DAY 26 5 11 1 9 5 31 29 20 10 18 2 MIN. QNH PRESSURE IN HPA 1011.0 1014.6 1012.8 1006.1 1012.3 1007.5 1009.2 1008.8 1013.6 1017.8 1015.5 1009.8 1006.1 DAY 21 20 21 3 5 20 26 16 5 21 6 24 MEAN QFF PRESSURE IN HPA 1016.4 1015.0 1010.5 1005.3 1000.6 995.0 992.3 993.0 1001.2 1008.6 1014.5 1015.4 1005.6 MAX. QFF PRESSURE IN HPA 1026.1 1026.6 1022.7 1012.2 1006.3 999.3 999.9 999.0 1008.5 1012.6 1021.3 1024.9 1026.6 DAY 26 5 11 1 8 4 31 1 30 26 18 30 MIN. QFF PRESSURE IN HPA 1008.3 1008.8 1003.4 996.8 994.7 988.9 988.9 988.6 993.7 1003.8 1005.5 1005.6 988.6 DAY 11 24 21 3 20 15 22 9 5 14 6 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.7 7.2 10.2 16.2 20.1 27.1 29.8 27.0 22.7 16.9 8.3 5.4 16.2 MINIMUN AIR TEMPERATURE (C) -3.4 0.6 2.8 7.8 10.4 16.8 21.0 17.7 12.8 6.8 -1.1 -0.9 7.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 3 19 1 0 0 0 0 23 DAYS WITH MINIMUM TEMP. <=-4 15 6 2 0 0 0 0 0 0 0 10 6 39 DAYS WITH FREEZING MIN.<= 0 25 15 10 0 0 0 0 0 0 0 17 20 87 TEMPERATURE RECORDS LOWEST(C) -11.6 -7.8 -9.4 2.4 3.0 12.0 15.4 14.0 5.8 3.4 -8.6 -11.2 -11.6 DAY 2 1 3 3 3 8 3 15 29 25 24 14 MAXIMUM AIR TEMPERATURE (C) 11.6 14.6 17.7 24.5 28.0 34.9 37.2 34.6 31.3 26.0 17.9 12.9 24.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 30 31 31 24 0 0 0 124 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.0 18.6 22.6 28.8 31.4 37.6 38.4 37.4 33.2 29.0 24.6 18.6 38.4 DAY 13 23 12 28 18 25 25 1 10 2 1 19 DIF. BETWEEN (MAX.-MIN.) (C) 15.0 14.0 14.9 16.7 17.6 18.1 16.2 16.9 18.5 19.2 19.0 13.8 16.7 MEAN DAILY TEMP. (MDT) (C) 4.1 7.6 10.2 16.1 19.2 25.9 29.1 26.2 22.1 16.4 8.4 6.0 15.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.1 145.8 251.0 161.0 42.9 0.0 0.0 0.0 608.9 HEATING DEG. DAYS(BASE 18 0C) 430.9 290.7 240.3 65.1 16.0 0.0 0.0 0.0 0.9 57.5 287.5 371.7 1760.6 DEWPOINT (MEAN C) -6.6 -3.8 -2.4 -0.4 -2.4 -0.7 4.4 -0.5 -3.7 -5.6 -8.7 -3.7 -2.8 MIXING RATIO (G/KG) 3.12 3.85 4.35 4.93 4.14 4.57 6.94 4.78 3.71 3.17 2.60 3.85 4.17 VAPOUR PRESSURE (HPA) 4.06 5.00 5.64 6.41 5.38 5.91 8.90 6.18 4.82 4.15 3.40 5.03 5.41 SATURATION DEF. (HPA) 4.51 5.85 7.62 13.26 19.59 31.71 34.64 31.08 24.54 16.59 8.79 4.62 16.90 RELATIVE HUMIDITY (MEAN %) 55 52 48 41 25 18 23 18 19 23 33 57 34 RELATIVE HUMIDITY (MAX. %) 80 83 80 71 43 30 37 29 31 38 56 81 55 RELATIVE HUMIDITY (MIN. %) 28 25 23 16 12 10 12 10 10 12 14 32 17 RELATIVE HUMIDITY (MEAN% 03UTC) 72 79 74 65 41 28 35 29 30 38 53 78 52 RELATIVE HUMIDITY (MEAN% 09UTC) 38 31 30 23 14 12 14 12 12 14 19 38 21 RELATIVE HUMIDITY (MEAN% 15UTC) 46 36 33 25 17 12 15 13 13 17 24 50 25 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.8 24.1 57.2 35.0 0.0 0.0 0.0 0.6 0.0 0.0 0.0 44.0 193.7 DAYS WITH PRECIPITATION >=10 1 1 3 2 0 0 0 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 5 2 1 5 2 0 0 0 0 0 0 0 1 11 DAYS WITH PRECIPITATION >= 1 8 2 10 5 0 0 0 0 0 0 0 3 28 DAYS WITH PRECIPITATION 8 4 10 5 0 0 0 1 0 0 0 5 33 GREATEST DAILY PRECIPITATION 11.0 20.0 12.0 14.0 0.0 0.0 0.0 0.6 0.0 0.0 0.0 35.0 35.0 DAY 17 5 26 10 ** ** ** 3 ** ** ** 6 DAY WITH THUNDER STORM 0 0 3 2 0 0 0 0 0 0 0 0 5 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 1 2 3 0 3 4 2 0 0 0 0 0 15 WIND DIRECTION (PREVAILING) 270 225 225 225 270 270 90 360 45 45 45 180 270 PREVAILING WIND SPEED(KNOTS) 8.8 10.0 11.6 10.2 10.7 9.4 10.2 12.0 9.2 7.8 7.6 9.9 10.4 PREVAILING WIND PERCENT 9.3 19.2 20.6 16.3 18.1 18.3 20.2 29.8 13.8 10.5 9.6 8.5 9.7 CALMS PERCENT OF WIND 55.6 40.6 42.3 47.1 41.5 47.5 32.3 29.8 54.2 57.7 60.4 61.7 47.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 201 228 227 245 288 269 79 15 7 339 229 184 268 VECTOR WIND MAGNITUDE(KNOTS) 1.3 3.0 3.9 2.3 2.2 1.7 3.8 4.4 1.8 0.9 0.5 1.3 0.6 WIND STEADINESES (MEAN %) 32.5 51.7 63.9 46.0 36.1 35.4 56.7 60.3 41.9 25.0 15.2 36.1 12.0 WIND SPEED (MEAN KNOTS) 4.0 5.8 6.1 5.0 6.1 4.8 6.7 7.3 4.3 3.6 3.3 3.6 5.0 FASTEST WIND DIRECTION 270 250 220 260 270 360 60 30 360 60 260 30 220 FASTEST WIND SPEED (KNOTS) 27 25 47 29 29 27 23 23 23 23 17 27 47 DAY 29 19 13 1 8 25 12 9 3 14 2 11 DAYS WITH SKY CLEAR (0-2)/8 12 13 13 17 23 27 24 30 30 31 21 18 259 DAYS WITH P.CLOUDY (3-6)/8 12 11 13 9 8 3 7 1 0 0 8 10 82 DAYS WITH CLOUDY (7-8)/8 7 4 5 4 0 0 0 0 0 0 1 3 24 DAYS WITH VISIBILITY =< 2 KM 2 0 1 0 0 0 0 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 199.1 208.2 234.1 251.4 315.2 337.3 315.4 347.9 328.3 315.6 255.4 212.9 3320.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.6 813.2 814.1 815.2 814.1 810.5 808.9 811.9 814.2 817.7 817.5 817.7 814.2 MAX. QFE PRESSURE IN HPA 822.9 819.3 821.0 822.4 819.0 817.3 814.9 815.5 819.9 821.9 825.2 822.0 825.2 DAY-HOUR 12- 6 6- 6 3- 6 8- 6 10- 6 1- 6 3- 6 5- 6 27- 6 29- 6 25- 6 22- 6 MIN. QFE PRESSURE IN HPA 808.3 804.8 808.4 810.1 809.3 804.8 803.6 808.3 809.4 813.6 811.2 812.9 803.6 DAY-HOUR 28-21 17-12 13-12 17-15 29-12 30-12 25-15 1-12 7-12 6-12 14-12 4-12 MEAN QNH PRESSURE IN HPA 1018.0 1015.1 1016.1 1017.5 1016.2 1011.8 1009.9 1013.6 1016.2 1020.5 1020.2 1020.4 1016.3 MAX. QNH PRESSURE IN HPA 1026.7 1022.4 1024.4 1026.1 1022.0 1020.0 1017.1 1017.8 1023.1 1025.5 1029.4 1025.6 1029.4 DAY-HOUR 12- 6 6- 6 3- 6 8- 6 10- 6 1- 6 3- 6 5- 6 27- 6 29- 6 25- 6 22- 6 MIN. QNH PRESSURE IN HPA 1009.2 1005.0 1009.3 1011.3 1010.4 1005.0 1003.6 1009.2 1010.5 1015.5 1012.7 1014.7 1003.6 DAY-HOUR 28-21 17-12 13-12 17-15 29-12 30-12 25-15 1-12 7-12 6-12 14-12 4-12 MEAN QFF PRESSURE IN HPA 1017.2 1011.4 1010.2 1007.0 1003.0 993.7 989.6 995.5 1001.2 1009.8 1016.0 1018.3 1006.1 MAX. QFF PRESSURE IN HPA 1027.3 1023.8 1027.9 1014.7 1012.6 1004.4 999.0 1000.7 1011.0 1017.2 1030.2 1031.2 1031.2 DAY-HOUR 12-15 6-18 3- 3 8- 3 3- 3 1- 3 3- 3 5- 3 27- 3 30- 3 25- 3 14- 6 MIN. QFF PRESSURE IN HPA 1004.9 1002.9 999.1 1000.3 996.1 986.3 982.9 988.7 994.8 1001.8 1005.1 1008.2 982.9 DAY-HOUR 28-21 15-12 13- 0 14- 0 29-12 30-18 25-18 1-12 10-12 6-12 14-12 4-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 815.3 813.1 813.5 814.8 813.7 810.4 809.0 811.8 813.9 817.6 817.3 817.5 814.0 MAX. QFE PRESSURE IN HPA 820.9 817.6 819.4 820.9 816.9 815.8 813.2 813.9 817.7 820.3 823.0 820.4 823.0 DAY 13 7 3 8 10 1 3 5 27 15 26 14 MIN. QFE PRESSURE IN HPA 808.7 807.7 809.5 811.1 811.5 806.8 805.8 808.7 810.9 814.2 813.2 814.3 805.8 DAY 29 17 27 18 29 21 26 1 7 1 14 4 MEAN QNH PRESSURE IN HPA 1017.5 1015.0 1015.4 1017.0 1015.7 1011.8 1010.0 1013.4 1015.9 1020.3 1020.0 1020.2 1016.0 MAX. QNH PRESSURE IN HPA 1024.3 1020.3 1022.5 1024.3 1019.5 1018.2 1015.1 1015.9 1020.4 1023.6 1026.8 1023.7 1026.8 DAY 13 7 3 8 10 1 3 5 27 15 26 14 MIN. QNH PRESSURE IN HPA 1009.7 1008.5 1010.6 1012.5 1013.0 1007.4 1006.2 1009.7 1012.3 1016.3 1015.1 1016.4 1006.2 DAY 29 17 27 18 29 21 26 1 7 1 14 4 MEAN QFF PRESSURE IN HPA 1016.0 1010.7 1009.0 1006.6 1002.6 994.0 989.8 995.1 1000.7 1009.3 1015.1 1017.2 1005.5 MAX. QFF PRESSURE IN HPA 1023.3 1021.5 1025.3 1011.8 1012.1 1002.9 997.9 998.7 1007.7 1013.4 1025.7 1029.2 1029.2 DAY 12 7 3 8 3 1 3 6 27 30 25 14 MIN. QFF PRESSURE IN HPA 1005.1 1004.1 999.1 1000.3 998.7 987.7 984.8 988.9 996.5 1002.2 1006.8 1010.2 984.8 DAY 29 27 13 14 25 26 26 1 11 1 2 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.7 813.6 814.3 815.6 814.9 811.6 809.8 812.8 815.0 818.4 818.0 817.9 814.8 MAX. QFE PRESSURE IN HPA 821.1 818.0 820.0 821.8 818.0 817.0 813.8 814.6 818.9 820.9 823.6 820.4 823.6 DAY 12 7 3 8 10 1 3 5 27 15 26 14 MIN. QFE PRESSURE IN HPA 810.3 808.0 810.2 811.5 811.9 807.8 806.8 809.0 811.6 815.4 813.6 814.8 806.8 DAY 29 17 27 14 29 21 26 1 7 1 14 4 MEAN QNH PRESSURE IN HPA 1018.1 1015.6 1016.4 1017.9 1017.1 1013.2 1011.0 1014.5 1017.2 1021.3 1020.8 1020.7 1017.0 MAX. QNH PRESSURE IN HPA 1024.5 1020.8 1023.2 1025.4 1020.8 1019.6 1015.8 1016.7 1021.9 1024.3 1027.5 1023.7 1027.5 DAY 12 7 3 8 10 1 3 5 27 15 26 14 MIN. QNH PRESSURE IN HPA 1011.6 1008.8 1011.5 1013.0 1013.5 1008.6 1007.4 1010.0 1013.1 1017.7 1015.5 1017.0 1007.4 DAY 29 17 27 14 29 21 26 1 7 1 14 4 MEAN QFF PRESSURE IN HPA 1018.4 1012.9 1011.5 1008.5 1004.7 995.6 991.4 997.5 1003.6 1012.4 1018.2 1020.0 1007.9 MAX. QFF PRESSURE IN HPA 1026.3 1023.2 1027.9 1014.7 1012.6 1004.4 999.0 1000.7 1011.0 1017.2 1030.2 1030.9 1030.9 DAY 7 7 3 8 3 1 3 5 27 30 25 14 MIN. QFF PRESSURE IN HPA 1007.8 1006.6 1003.0 1001.7 999.6 990.5 986.3 990.0 998.7 1005.3 1009.5 1012.7 986.3 DAY 29 26 21 14 18 26 26 1 8 1 2 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 817.1 814.9 815.7 816.6 815.7 812.1 810.2 813.4 815.9 819.4 819.2 819.2 815.8 MAX. QFE PRESSURE IN HPA 822.9 819.3 821.0 822.4 819.0 817.3 814.9 815.5 819.9 821.9 825.2 822.0 825.2 DAY 12 6 3 8 10 1 3 5 27 29 25 22 MIN. QFE PRESSURE IN HPA 811.8 808.6 810.6 813.0 812.3 807.5 807.0 810.3 812.4 816.3 814.5 815.8 807.0 DAY 17 17 13 14 29 30 26 1 7 1 14 6 MEAN QNH PRESSURE IN HPA 1019.7 1017.1 1018.1 1019.1 1018.1 1013.8 1011.5 1015.3 1018.2 1022.5 1022.2 1022.2 1018.1 MAX. QNH PRESSURE IN HPA 1026.7 1022.4 1024.4 1026.1 1022.0 1020.0 1017.1 1017.8 1023.1 1025.5 1029.4 1025.6 1029.4 DAY 12 6 3 8 10 1 3 5 27 29 25 22 MIN. QNH PRESSURE IN HPA 1013.4 1009.5 1011.9 1014.8 1014.0 1008.2 1007.6 1011.6 1014.1 1018.8 1016.6 1018.2 1007.6 DAY 17 17 13 14 29 30 26 1 7 1 14 6 MEAN QFF PRESSURE IN HPA 1019.3 1013.5 1012.2 1008.1 1004.5 995.4 990.9 996.8 1002.9 1011.2 1017.5 1020.2 1007.7 MAX. QFF PRESSURE IN HPA 1025.9 1021.8 1025.5 1013.2 1012.4 1003.7 998.0 1000.3 1010.0 1015.5 1029.4 1031.2 1031.2 DAY 12 7 3 8 2 1 3 11 27 30 25 14 MIN. QFF PRESSURE IN HPA 1009.8 1007.4 1002.5 1002.9 998.8 988.8 985.7 991.3 998.7 1004.6 1009.0 1013.0 985.7 DAY 29 15 13 17 18 30 26 1 8 1 2 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.7 813.4 814.6 815.6 814.6 811.0 808.9 812.1 814.5 817.9 817.6 817.6 814.5 MAX. QFE PRESSURE IN HPA 821.7 818.7 819.2 821.2 818.1 816.3 813.9 813.9 818.3 820.4 824.0 820.5 824.0 DAY 12 6 3 7 11 1 3 5 27 15 25 22 MIN. QFE PRESSURE IN HPA 810.3 806.7 809.4 811.4 810.7 806.4 805.8 809.1 810.9 815.0 812.5 814.4 805.8 DAY 17 17 13 17 29 30 25 1 7 6 14 6 MEAN QNH PRESSURE IN HPA 1018.1 1015.3 1016.7 1017.9 1016.7 1012.4 1009.9 1013.8 1016.7 1020.7 1020.3 1020.3 1016.6 MAX. QNH PRESSURE IN HPA 1025.2 1021.6 1022.2 1024.6 1020.9 1018.8 1015.9 1015.9 1021.2 1023.7 1028.0 1023.8 1028.0 DAY 12 6 3 7 11 1 3 5 27 15 25 22 MIN. QNH PRESSURE IN HPA 1011.6 1007.3 1010.5 1012.9 1012.1 1006.9 1006.2 1010.2 1012.3 1017.2 1014.2 1016.5 1006.2 DAY 17 17 13 17 29 30 25 1 7 6 14 6 MEAN QFF PRESSURE IN HPA 1016.9 1011.1 1010.4 1007.0 1003.2 993.8 989.2 994.9 1000.8 1009.0 1015.2 1017.3 1005.7 MAX. QFF PRESSURE IN HPA 1024.4 1020.9 1022.9 1012.5 1009.7 1002.5 997.6 998.3 1007.4 1013.4 1026.3 1028.0 1028.0 DAY 12 6 2 7 11 1 3 12 27 30 25 13 MIN. QFF PRESSURE IN HPA 1007.8 1003.5 1000.1 1002.9 997.5 987.9 984.8 988.9 996.3 1004.0 1006.4 1010.3 984.8 DAY 29 15 13 27 18 30 26 1 1 6 2 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 814.4 812.0 813.0 814.2 813.2 809.5 807.7 810.8 813.0 816.5 816.3 816.5 813.1 MAX. QFE PRESSURE IN HPA 820.4 817.7 818.0 819.1 816.5 815.4 812.2 812.8 816.9 819.4 822.9 819.6 822.9 DAY 12 6 3 7 10 1 3 5 27 15 25 22 MIN. QFE PRESSURE IN HPA 809.1 804.8 808.4 810.5 809.3 804.8 804.0 808.3 809.4 813.6 811.2 812.9 804.0 DAY 17 17 13 17 29 30 25 1 7 6 14 4 MEAN QNH PRESSURE IN HPA 1016.5 1013.6 1014.8 1016.2 1015.1 1010.7 1008.4 1012.2 1014.9 1019.0 1018.7 1019.0 1014.9 MAX. QNH PRESSURE IN HPA 1023.7 1020.4 1020.8 1022.1 1019.0 1017.7 1013.9 1014.6 1019.5 1022.5 1026.7 1022.7 1026.7 DAY 12 6 3 7 10 1 3 5 27 15 25 22 MIN. QNH PRESSURE IN HPA 1010.2 1005.0 1009.3 1011.8 1010.4 1005.0 1004.0 1009.2 1010.5 1015.5 1012.7 1014.7 1004.0 DAY 17 17 13 17 29 30 25 1 7 6 14 4 MEAN QFF PRESSURE IN HPA 1015.0 1009.3 1008.4 1005.9 1002.0 992.9 988.4 994.1 999.7 1008.0 1013.9 1016.0 1004.5 MAX. QFF PRESSURE IN HPA 1022.9 1019.8 1022.0 1011.3 1008.7 1002.7 996.2 997.1 1007.1 1012.2 1025.7 1027.0 1027.0 DAY 12 6 3 22 3 1 3 5 27 15 25 13 MIN. QFF PRESSURE IN HPA 1007.5 1002.9 999.8 1000.7 996.1 987.1 983.1 988.7 994.8 1001.8 1005.1 1008.2 983.1 DAY 29 15 13 28 29 30 25 1 10 6 14 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.2 812.4 813.2 814.4 813.1 809.2 807.5 811.0 813.1 816.8 816.8 817.3 813.3 MAX. QFE PRESSURE IN HPA 821.2 818.3 818.0 819.8 817.3 815.4 811.5 812.9 816.7 820.0 823.1 820.3 823.1 DAY 12 6 2 7 10 1 3 11 27 15 25 22 MIN. QFE PRESSURE IN HPA 809.4 805.4 809.2 810.1 809.6 804.8 803.6 808.4 809.4 813.9 812.0 813.7 803.6 DAY 28 17 27 17 29 30 25 21 7 6 14 4 MEAN QNH PRESSURE IN HPA 1017.4 1014.2 1015.1 1016.5 1015.0 1010.3 1008.2 1012.4 1014.9 1019.4 1019.4 1019.9 1015.2 MAX. QNH PRESSURE IN HPA 1024.6 1021.2 1020.8 1023.0 1020.0 1017.7 1013.0 1014.7 1019.2 1023.2 1026.9 1023.6 1026.9 DAY 12 6 2 7 10 1 3 11 27 15 25 22 MIN. QNH PRESSURE IN HPA 1010.5 1005.7 1010.3 1011.3 1010.7 1005.0 1003.6 1009.3 1010.5 1015.9 1013.6 1015.7 1003.6 DAY 28 17 27 17 29 30 25 21 7 6 14 4 MEAN QFF PRESSURE IN HPA 1017.6 1011.4 1010.1 1007.0 1002.6 992.7 988.8 995.5 1001.2 1010.5 1016.8 1019.3 1006.1 MAX. QFF PRESSURE IN HPA 1027.3 1022.1 1023.4 1012.0 1011.0 1002.9 995.5 998.5 1008.9 1015.7 1029.4 1030.8 1030.8 DAY 12 6 2 3 2 1 3 5 27 15 25 14 MIN. QFF PRESSURE IN HPA 1008.6 1004.9 1001.4 1001.5 996.7 987.2 983.6 990.1 995.6 1004.8 1008.0 1010.4 983.6 DAY 28 26 12 28 29 30 25 1 10 6 2 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 816.0 813.3 814.3 815.5 814.0 810.0 808.8 812.0 813.9 817.7 817.7 818.1 814.3 MAX. QFE PRESSURE IN HPA 821.7 819.3 819.4 821.1 818.1 816.0 812.0 813.9 817.5 820.5 824.2 821.0 824.2 DAY 12 6 2 7 10 1 2 11 26 15 25 22 MIN. QFE PRESSURE IN HPA 809.0 807.0 810.1 811.5 811.1 805.6 804.3 809.7 810.6 815.2 813.2 814.8 804.3 DAY 28 17 13 17 23 30 25 25 7 6 14 4 MEAN QNH PRESSURE IN HPA 1018.4 1015.1 1016.3 1017.8 1016.1 1011.3 1009.8 1013.6 1015.9 1020.4 1020.4 1020.9 1016.3 MAX. QNH PRESSURE IN HPA 1025.2 1022.4 1022.5 1024.5 1020.9 1018.4 1013.6 1015.9 1020.2 1023.8 1028.2 1024.4 1028.2 DAY 12 6 2 7 10 1 2 11 26 15 25 22 MIN. QNH PRESSURE IN HPA 1010.0 1007.6 1011.3 1013.0 1012.5 1006.0 1004.4 1010.9 1011.9 1017.5 1015.1 1017.0 1004.4 DAY 28 17 13 17 23 30 25 25 7 6 14 4 MEAN QFF PRESSURE IN HPA 1017.9 1011.5 1010.4 1006.8 1002.4 992.8 989.3 995.2 1000.7 1009.3 1015.9 1019.1 1005.9 MAX. QFF PRESSURE IN HPA 1025.2 1023.8 1025.0 1011.6 1010.8 1002.6 995.2 999.1 1006.6 1014.2 1028.2 1030.5 1030.5 DAY 12 6 2 7 2 1 2 11 28 16 25 13 MIN. QFF PRESSURE IN HPA 1007.0 1005.4 1001.5 1002.7 996.9 986.3 982.9 991.7 996.1 1004.0 1006.7 1012.2 982.9 DAY 28 26 12 28 29 30 25 21 7 5 2 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 815.8 813.3 814.2 815.4 814.0 810.1 809.1 811.9 814.0 817.7 817.5 817.8 814.2 MAX. QFE PRESSURE IN HPA 820.9 818.5 819.4 821.3 817.6 815.6 813.0 813.6 817.5 820.5 823.9 820.4 823.9 DAY 12 6 2 7 10 1 2 11 26 14 25 13 MIN. QFE PRESSURE IN HPA 808.3 808.1 809.3 811.5 811.7 805.9 805.9 809.7 810.9 815.2 813.2 814.9 805.9 DAY 28 16 13 17 23 30 25 25 6 5 14 3 MEAN QNH PRESSURE IN HPA 1018.1 1015.1 1016.2 1017.6 1016.0 1011.4 1010.2 1013.5 1016.0 1020.4 1020.2 1020.5 1016.3 MAX. QNH PRESSURE IN HPA 1024.3 1021.4 1022.5 1024.8 1020.3 1017.9 1014.8 1015.5 1020.2 1023.8 1027.9 1023.7 1027.9 DAY 12 6 2 7 10 1 2 11 26 14 25 13 MIN. QNH PRESSURE IN HPA 1009.2 1008.9 1010.4 1013.0 1013.3 1006.3 1006.3 1010.9 1012.3 1017.5 1015.1 1017.1 1006.3 DAY 28 16 13 17 23 30 25 25 6 5 14 3 MEAN QFF PRESSURE IN HPA 1016.9 1010.8 1009.6 1006.6 1002.3 992.7 989.4 994.7 1000.3 1008.8 1015.3 1017.7 1005.4 MAX. QFF PRESSURE IN HPA 1023.2 1022.7 1023.8 1012.0 1010.6 1001.2 997.1 997.9 1005.9 1013.5 1026.4 1029.0 1029.0 DAY 11 6 2 7 2 1 2 11 26 29 25 13 MIN. QFF PRESSURE IN HPA 1004.9 1003.8 1001.1 1002.3 996.8 986.3 984.6 991.0 996.4 1003.5 1007.4 1011.5 984.6 DAY 28 15 12 13 18 25 25 1 10 5 1 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.7 6.0 9.8 15.7 21.5 26.6 29.0 27.3 23.2 16.5 10.1 6.1 16.3 MINIMUN AIR TEMPERATURE (C) -3.7 -2.1 1.9 6.3 10.5 15.3 19.2 17.1 12.2 6.1 0.6 -1.7 6.8 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.0 0.0 1.1 9.4 2.1 0.1 0.0 0.0 0.0 12.7 DAYS WITH MINIMUM TEMP. <=-4 16.3 11.9 2.4 0.0 0.0 0.0 0.0 0.0 0.0 0.1 3.8 10.1 44.6 DAYS WITH FREEZING MIN.<= 0 24.6 19.1 11.2 1.2 0.0 0.0 0.0 0.0 0.0 1.1 13.1 21.2 91.5 TEMPERATURE RECORDS LOWEST(C) -17.8 -14.0 -11.0 -3.6 1.6 5.6 10.6 7.4 2.4 -6.0 -11.0 -16.6 -17.8 YEAR-DAY 92-29 89-15 92-13 97-14 89- 3 93- 5 87- 4 97-31 89-25 96-21 95-28 90-29 92-29 MAXIMUM AIR TEMPERATURE (C) 10.4 12.9 16.5 22.8 28.8 33.8 35.5 34.3 31.1 24.9 18.4 13.5 23.6 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.0 0.2 12.9 28.7 30.8 30.8 21.0 0.4 0.0 0.0 124.8 DAYS WITH MAXIMUM TEMP. <= 0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.4 TEMPERATURE RECORDS HIGHEST(C) 19.0 20.4 26.4 30.6 35.5 38.5 40.4 39.4 37.4 30.6 24.6 24.4 40.4 YEAR-DAY 94- 1 97-21 98-29 87-27 0-31 90-30 98-11 94- 6 91- 9 98- 1 3- 1 98-17 98-11 DIF. BETWEEN (MAX.-MIN.) (C) 14.1 15.0 14.6 16.5 18.3 18.5 16.3 17.2 18.9 18.8 17.8 15.2 16.8 MEAN DAILY TEMP. (MDT) (C) 3.3 5.4 9.2 14.6 19.7 24.6 27.4 25.7 21.7 15.5 9.5 5.9 15.2 STANDARD DEVIATION OF MDT(C) 1.08 1.28 1.21 1.28 1.20 0.70 1.11 0.86 1.05 0.85 0.86 1.36 1.07 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.2 15.9 107.7 196.2 146.0 42.2 0.2 0.0 0.0 508.4 HEATING DEG. DAYS(BASE 18 0C) 454.8 355.7 271.8 108.0 15.3 0.1 0.0 0.0 3.8 82.5 255.3 375.4 1922.7 DEWPOINT (MEAN C) -6.4 -6.3 -3.7 -1.6 -0.4 0.4 3.4 1.4 -1.6 -3.4 -4.9 -5.3 -2.4 MIXING RATIO (G/KG) 3.19 3.29 3.94 4.48 4.83 5.12 6.40 5.61 4.45 3.89 3.51 3.48 4.35 VAPOUR PRESSURE (HPA) 4.16 4.28 5.12 5.82 6.27 6.61 8.24 7.24 5.78 5.08 4.58 4.54 5.64 SATURATION DEF. (HPA) 4.26 5.75 7.87 13.33 21.21 30.44 33.51 30.78 24.68 15.35 8.96 5.67 16.82 RELATIVE HUMIDITY (MEAN %) 55 47 45 37 27 20 22 21 21 29 39 50 34 RELATIVE HUMIDITY (MAX. %) 77 74 72 63 47 32 33 32 34 46 61 72 54 RELATIVE HUMIDITY (MIN. %) 32 26 24 19 14 12 14 13 13 17 22 29 20 RELATIVE HUMIDITY (MEAN% 03UTC) 73 71 68 60 44 31 32 31 33 44 59 69 51 RELATIVE HUMIDITY (MEAN% 09UTC) 40 33 31 23 17 14 16 15 15 20 27 36 24 RELATIVE HUMIDITY (MEAN% 15UTC) 44 35 33 26 19 15 16 15 16 23 31 43 26 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.5 30.4 36.2 17.2 7.3 0.4 0.5 0.3 0.2 2.9 5.9 27.8 162.6 DAYS WITH PRECIPITATION >=10 1.2 0.9 1.4 0.7 0.2 0.0 0.0 0.0 0.0 0.1 0.3 1.1 5.9 DAYS WITH PRECIPITATION >= 5 2.5 1.8 2.8 1.2 0.4 0.0 0.0 0.0 0.0 0.2 0.4 1.6 10.9 DAYS WITH PRECIPITATION >= 1 5.0 3.3 5.6 3.0 0.8 0.2 0.2 0.1 0.1 0.6 1.1 3.5 23.5 DAYS WITH PRECIPITATION 5.9 4.2 6.8 3.7 1.1 0.5 0.4 0.4 0.1 0.9 2.1 4.3 30.4 GREATEST DAILY PRECIPITATION 24.2 43.0 25.0 20.0 41.0 2.0 3.0 3.0 2.0 17.0 14.0 35.0 43.0 YEAR-DAY 99-18 93- 4 94- 1 95-23 92-11 95- 1 87-28 94-13 94- 8 97-31 91-24 3- 6 93 DAY WITH THUNDER STORM 0.0 0.0 0.6 0.9 0.6 0.2 0.1 0.0 0.1 0.4 0.1 0.2 3.2 DAYS WITH SNOW OR SLEET 1.6 0.2 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.3 DAYS WITH DUST 1.1 2.9 3.0 2.5 2.4 1.7 1.4 1.3 0.6 0.4 0.5 0.6 18.4 WIND DIRECTION (PREVAILING) 180 225 225 270 270 270 360 360 360 270 225 180 270 PREVAILING WIND SPEED(KNOTS) 8.7 11.5 11.7 11.3 10.2 8.8 13.0 12.3 11.1 8.4 8.7 8.7 10.0 PREVAILING WIND PERCENT 9.5 14.1 14.6 16.6 16.9 11.8 23.5 27.2 14.2 8.0 7.5 9.4 9.5 CALMS PERCENT OF WIND 52.4 41.9 40.6 43.0 43.4 40.6 29.7 28.6 44.4 56.0 61.2 58.7 45.0 NO. OF WIND OBSERVATION 220.6 200.8 220.6 213.5 220.7 212.2 220.6 226.1 215.2 222.5 218.5 226.1 2617.4 VECTOR WIND DIRECTION (MEAN) 199 222 228 250 265 309 22 18 2 278 211 193 270 VECTOR WIND MAGNITUDE(KNOTS) 1.6 2.6 3.1 2.8 2.3 1.0 3.4 3.8 1.1 0.4 0.8 1.3 0.7 WIND STEADINESES (MEAN %) 35.6 42.6 48.4 48.3 41.1 18.2 45.9 53.5 22.4 10.5 24.2 35.1 13.2 WIND SPEED (MEAN KNOTS) 4.5 6.1 6.4 5.8 5.6 5.5 7.4 7.1 4.9 3.8 3.3 3.7 5.3 FASTEST WIND DIRECTION 270 180 220 270 230 360 360 360 360 360 240 260 180 FASTEST WIND SPEED (KNOTS) 43 68 47 51 54 43 39 39 43 39 33 39 68 YEAR-DAY 92- 1 92-25 3-13 90-16 91-23 97-19 91-22 92- 4 91-26 91- 4 92-26 90-25 92 DAYS WITH SKY CLEAR (0-2)/8 17.3 15.9 14.7 15.4 22.6 27.4 25.9 28.2 28.5 27.4 19.9 18.4 261.6 DAYS WITH P.CLOUDY (3-6)/8 8.9 8.3 10.6 11.5 7.4 2.6 5.1 2.8 1.4 3.2 8.6 8.6 79.0 DAYS WITH CLOUDY (7-8)/8 4.8 4.0 5.6 3.1 0.9 0.1 0.1 0.0 0.0 0.4 1.4 3.9 24.3 DAYS WITH VISIBILITY =< 2 KM 1.2 0.4 0.5 0.2 0.1 0.1 0.0 0.1 0.0 0.2 0.2 0.5 3.5 DURATION OF SUNSHINE HOURS 218.1 220.6 232.9 259.5 329.5 349.5 333.7 343.2 312.7 302.7 244.5 217.0 3363.9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 814.8 814.1 813.5 814.5 814.0 811.2 809.7 811.6 814.5 817.6 817.8 817.0 814.2 MAX. QFE PRESSURE IN HPA 823.8 823.4 824.0 822.7 820.5 818.2 817.1 818.0 822.5 824.3 825.4 826.0 826.0 YEAR-DAY 92-10 87- 1 2-11 98-12 98- 8 99- 1 96- 3 87- 7 94-24 89-27 96-19 98-10 98-10 MIN. QFE PRESSURE IN HPA 801.8 804.8 804.5 805.0 805.9 804.2 803.1 804.9 805.5 810.9 810.0 807.5 801.8 YEAR-DAY 98-13 3-17 1-26 2- 4 1-25 92-27 95-16 94- 2 0- 1 92- 7 0- 6 88-26 98-13 MEAN QNH PRESSURE IN HPA 1017.0 1016.2 1015.4 1016.6 1016.0 1012.7 1010.9 1013.2 1016.6 1020.4 1020.6 1019.6 1016.2 MAX. QNH PRESSURE IN HPA 1027.7 1027.3 1028.0 1026.4 1023.8 1021.0 1019.7 1020.8 1026.2 1028.3 1029.7 1030.4 1030.4 YEAR-DAY 92-10 87- 1 2-11 98-12 98- 8 99- 1 96- 3 87- 7 94-24 89-27 96-19 98-10 98-10 MIN. QNH PRESSURE IN HPA 1001.4 1005.0 1004.6 1005.2 1006.3 1004.3 1003.0 1005.1 1005.8 1012.3 1011.2 1008.2 1001.4 YEAR-DAY 98-13 3-17 1-26 2- 4 1-25 92-27 95-16 94- 2 0- 1 92- 7 0- 6 88-26 98-13 MEAN QFF PRESSURE IN HPA 1016.8 1013.7 1010.3 1006.8 1002.4 995.2 991.5 995.3 1002.0 1010.2 1015.2 1017.6 1006.4 MAX. QFF PRESSURE IN HPA 1033.7 1029.3 1027.9 1018.8 1012.8 1008.7 1002.6 1005.3 1018.3 1021.6 1030.6 1031.2 1033.7 YEAR-DAY 92-10 98-24 3- 3 94- 6 95-27 95- 1 0-26 96-31 94-23 95-28 96-19 3-14 92-10 MIN. QFF PRESSURE IN HPA 1001.5 999.1 997.7 995.1 990.3 986.0 982.2 983.3 988.8 998.8 1003.5 999.5 982.2 YEAR-DAY 98-13 1-21 1-26 92-18 1-25 92-28 95-16 94- 4 0- 1 0- 1 0- 6 94- 4 95-16 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 814.7 813.7 813.1 813.9 813.6 810.9 809.5 811.6 814.3 817.3 817.4 816.9 813.9 MAX. QFE PRESSURE IN HPA 820.9 820.4 821.0 820.9 818.8 816.0 815.7 816.0 820.7 822.6 823.4 824.3 824.3 YEAR-DAY 3-13 2- 6 2-13 3- 8 95-27 99- 1 96- 4 96-31 94-24 93-17 96-19 98-10 98-10 MIN. QFE PRESSURE IN HPA 804.7 806.0 804.5 805.0 806.6 805.3 804.1 807.0 807.0 812.2 811.0 808.3 804.1 YEAR-DAY 97-26 98-16 1-26 2- 4 1-26 92-28 95-17 94- 1 0- 1 92- 7 95-26 94- 4 95-17 MEAN QNH PRESSURE IN HPA 1016.8 1015.6 1015.0 1015.9 1015.5 1012.3 1010.6 1013.1 1016.4 1020.0 1020.1 1019.5 1015.9 MAX. QNH PRESSURE IN HPA 1024.3 1023.7 1024.4 1024.3 1021.8 1018.4 1018.1 1018.4 1024.0 1026.3 1027.3 1028.3 1028.3 YEAR-DAY 3-13 2- 6 2-13 3- 8 95-27 99- 1 96- 4 96-31 94-24 93-17 96-19 98-10 98-10 MIN. QNH PRESSURE IN HPA 1004.9 1006.4 1004.6 1005.2 1007.2 1005.6 1004.2 1007.6 1007.6 1013.9 1012.4 1009.2 1004.2 YEAR-DAY 97-26 98-16 1-26 2- 4 1-26 92-28 95-17 94- 1 0- 1 92- 7 95-26 94- 4 95-17 MEAN QFF PRESSURE IN HPA 1015.8 1012.8 1009.5 1006.3 1002.3 995.3 991.6 995.1 1001.6 1009.6 1014.4 1016.5 1005.9 MAX. QFF PRESSURE IN HPA 1028.8 1027.3 1025.3 1016.8 1012.1 1006.0 1000.1 1002.3 1014.2 1018.4 1026.1 1029.2 1029.2 YEAR-DAY 92-10 98-24 3- 3 94- 6 3- 3 95- 2 0-23 0-14 94-24 95-28 96-19 3-14 3-14 MIN. QFF PRESSURE IN HPA 1003.5 1001.3 997.7 996.1 991.1 986.0 984.0 986.1 991.1 1000.6 1004.4 999.5 984.0 YEAR-DAY 93- 9 94-12 1-26 2- 4 1-27 92-28 97-12 94- 4 0- 2 0- 1 94-26 94- 4 97-12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.3 814.4 813.9 815.0 814.6 812.1 810.6 812.5 815.2 818.2 818.3 817.3 814.8 MAX. QFE PRESSURE IN HPA 823.0 822.4 822.5 821.8 819.7 817.5 816.7 817.1 821.9 823.4 824.3 825.0 825.0 YEAR-DAY 87-20 87- 1 2-11 3- 8 98- 8 87-29 96- 3 87- 7 94-23 93-17 96-19 98-10 98-10 MIN. QFE PRESSURE IN HPA 804.6 806.3 805.8 805.4 807.7 806.4 804.9 807.3 808.0 813.1 811.4 808.0 804.6 YEAR-DAY 98-13 98-16 1-26 2- 4 1-26 94-29 95-17 94- 1 0- 1 92- 7 95-26 94- 4 98-13 MEAN QNH PRESSURE IN HPA 1017.5 1016.5 1015.9 1017.2 1016.8 1013.7 1011.9 1014.2 1017.5 1021.1 1021.2 1020.0 1016.9 MAX. QNH PRESSURE IN HPA 1026.8 1026.1 1026.2 1025.4 1022.8 1020.2 1019.2 1019.7 1025.5 1027.3 1028.3 1029.2 1029.2 YEAR-DAY 87-20 87- 1 2-11 3- 8 98- 8 87-29 96- 3 87- 7 94-23 93-17 96-19 98-10 98-10 MIN. QNH PRESSURE IN HPA 1004.8 1006.8 1006.2 1005.7 1008.5 1006.9 1005.1 1008.0 1008.8 1014.9 1012.9 1008.8 1004.8 YEAR-DAY 98-13 98-16 1-26 2- 4 1-26 94-29 95-17 94- 1 0- 1 92- 7 95-26 94- 4 98-13 MEAN QFF PRESSURE IN HPA 1018.4 1015.5 1011.6 1008.6 1003.7 996.9 993.4 997.2 1004.0 1012.8 1017.7 1019.3 1008.3 MAX. QFF PRESSURE IN HPA 1032.7 1031.6 1027.9 1018.8 1014.1 1008.4 1003.5 1005.3 1018.3 1021.9 1030.7 1035.8 1035.8 YEAR-DAY 92-10 91-15 3- 3 94- 6 89- 2 95- 1 87-30 96-31 94-23 87-18 87-30 87- 2 87- 2 MIN. QFF PRESSURE IN HPA 1002.7 1002.5 999.6 1000.7 993.0 988.5 984.0 987.8 992.6 1003.3 1006.5 1001.1 984.0 YEAR-DAY 98-13 99- 6 87-14 2-21 1-26 92-28 95-17 94- 2 0- 2 1- 1 94-26 94- 4 95-17 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 816.5 815.6 815.0 815.9 815.4 812.6 811.0 813.1 816.1 819.3 819.4 818.5 815.7 MAX. QFE PRESSURE IN HPA 824.1 823.4 824.0 822.7 820.5 818.2 817.1 818.0 822.5 824.3 825.4 826.0 826.0 YEAR-DAY 87-19 87- 1 2-11 98-12 98- 8 99- 1 96- 3 87- 7 94-24 89-27 96-19 98-10 98-10 MIN. QFE PRESSURE IN HPA 804.1 807.2 806.8 805.6 808.8 806.7 805.4 807.5 808.2 814.2 812.7 809.5 804.1 YEAR-DAY 98-13 90-16 1-26 2- 4 90-13 92-27 95-17 94- 1 0- 1 92- 7 95-26 94- 4 98-13 MEAN QNH PRESSURE IN HPA 1019.0 1017.9 1017.2 1018.3 1017.7 1014.4 1012.5 1014.9 1018.5 1022.3 1022.5 1021.4 1018.0 MAX. QNH PRESSURE IN HPA 1028.1 1027.3 1028.0 1026.4 1023.8 1021.0 1019.7 1020.8 1026.2 1028.3 1029.7 1030.4 1030.4 YEAR-DAY 87-19 87- 1 2-11 98-12 98- 8 99- 1 96- 3 87- 7 94-24 89-27 96-19 98-10 98-10 MIN. QNH PRESSURE IN HPA 1004.2 1007.9 1007.4 1006.0 1009.8 1007.3 1005.7 1008.2 1009.1 1016.3 1014.5 1010.6 1004.2 YEAR-DAY 98-13 90-16 1-26 2- 4 90-13 92-27 95-17 94- 1 0- 1 92- 7 95-26 94- 4 98-13 MEAN QFF PRESSURE IN HPA 1018.7 1015.5 1012.0 1008.1 1003.8 996.6 992.8 996.6 1003.5 1011.7 1016.7 1019.4 1007.9 MAX. QFF PRESSURE IN HPA 1033.7 1028.1 1025.6 1018.1 1012.4 1008.7 1002.6 1004.7 1015.6 1019.6 1030.5 1031.2 1033.7 YEAR-DAY 92-10 2- 5 92-13 98-12 3- 2 95- 1 0-26 96-31 94-23 93- 9 96-19 3-14 92-10 MIN. QFF PRESSURE IN HPA 1003.6 1004.3 1001.2 999.5 993.5 988.5 983.9 986.9 991.2 1003.0 1007.1 1004.9 983.9 YEAR-DAY 98-13 94-12 1-26 2-21 1-26 92-27 95-17 94- 1 0- 2 98- 1 99-12 94- 4 95-17 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.3 814.5 813.9 814.9 814.4 811.6 809.9 811.9 814.8 817.9 817.9 817.0 814.5 MAX. QFE PRESSURE IN HPA 823.0 822.7 822.8 821.6 819.6 817.6 816.4 817.0 821.4 822.6 824.0 824.2 824.2 YEAR-DAY 87-19 91-15 2-11 98-12 98- 8 87-28 96- 3 99-19 94-23 93-17 3-25 87- 1 87- 1 MIN. QFE PRESSURE IN HPA 802.5 806.1 805.8 806.6 807.6 805.6 804.3 806.4 807.0 812.6 811.4 808.0 802.5 YEAR-DAY 98-13 96- 5 1-26 2- 4 1-26 92-27 95-17 94- 1 0- 1 96- 6 0- 6 2-22 98-13 MEAN QNH PRESSURE IN HPA 1017.5 1016.6 1015.9 1017.0 1016.4 1013.1 1011.2 1013.5 1016.9 1020.6 1020.7 1019.7 1016.6 MAX. QNH PRESSURE IN HPA 1026.8 1026.4 1026.5 1025.1 1022.7 1020.3 1018.9 1019.6 1024.9 1026.3 1028.0 1028.2 1028.2 YEAR-DAY 87-19 91-15 2-11 98-12 98- 8 87-28 96- 3 99-19 94-23 93-17 3-25 87- 1 87- 1 MIN. QNH PRESSURE IN HPA 1002.2 1006.6 1006.2 1007.2 1008.4 1006.0 1004.4 1006.9 1007.6 1014.3 1012.9 1008.8 1002.2 YEAR-DAY 98-13 96- 5 1-26 2- 4 1-26 92-27 95-17 94- 1 0- 1 96- 6 0- 6 2-22 98-13 MEAN QFF PRESSURE IN HPA 1016.3 1013.5 1010.3 1006.8 1002.6 995.4 991.3 994.9 1001.5 1009.5 1014.4 1016.8 1006.1 MAX. QFF PRESSURE IN HPA 1030.1 1025.7 1023.2 1016.2 1011.5 1006.9 1001.4 1002.8 1013.5 1018.2 1028.1 1028.0 1030.1 YEAR-DAY 92-10 2- 6 92-13 98-12 92-14 95- 1 96- 3 99-19 94-23 95-29 96-19 3-13 92-10 MIN. QFF PRESSURE IN HPA 1002.3 1001.5 999.3 996.4 992.7 987.8 983.1 985.1 990.7 1000.8 1004.6 1002.5 983.1 YEAR-DAY 97-17 96- 5 1-26 92-18 1-26 92-27 95-17 94- 3 0- 1 1- 1 99-12 2-22 95-17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.9 812.9 812.3 813.3 812.9 810.2 808.6 810.4 813.2 816.4 816.6 815.7 813.0 MAX. QFE PRESSURE IN HPA 821.2 821.2 820.5 820.0 818.9 816.5 815.5 816.2 820.2 821.4 822.9 822.7 822.9 YEAR-DAY 87-17 91-15 2-11 88-12 87- 2 87-28 96- 3 87- 7 94-23 93-17 3-25 98-10 3-25 MIN. QFE PRESSURE IN HPA 801.8 804.8 805.0 805.7 806.3 804.5 803.5 804.9 805.5 810.9 810.0 807.5 801.8 YEAR-DAY 98-13 3-17 1-26 2- 4 1-25 92-27 91-14 94- 2 0- 1 92- 7 0- 6 88-26 98-13 MEAN QNH PRESSURE IN HPA 1015.9 1014.6 1014.0 1015.2 1014.7 1011.5 1009.6 1011.8 1015.1 1018.8 1019.1 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1024.6 1024.6 1023.8 1023.2 1021.9 1019.0 1017.8 1018.6 1023.4 1024.9 1026.7 1026.4 1026.7 YEAR-DAY 87-17 91-15 2-11 88-12 87- 2 87-28 96- 3 87- 7 94-23 93-17 3-25 98-10 3-25 MIN. QNH PRESSURE IN HPA 1001.4 1005.0 1005.2 1006.1 1006.8 1004.6 1003.4 1005.1 1005.8 1012.3 1011.2 1008.2 1001.4 YEAR-DAY 98-13 3-17 1-26 2- 4 1-25 92-27 91-14 94- 2 0- 1 92- 7 0- 6 88-26 98-13 MEAN QFF PRESSURE IN HPA 1014.7 1011.6 1008.6 1005.4 1001.5 994.4 990.4 993.9 1000.5 1008.4 1013.1 1015.3 1004.8 MAX. QFF PRESSURE IN HPA 1027.3 1023.1 1022.0 1015.4 1010.8 1005.4 1000.3 1000.9 1013.3 1016.3 1025.7 1027.0 1027.3 YEAR-DAY 92-10 98-23 3- 3 94- 5 92-11 95- 1 96- 3 99-19 94-23 94-11 3-25 3-13 92-10 MIN. QFF PRESSURE IN HPA 1001.5 999.1 998.6 995.1 991.3 986.0 983.1 983.3 989.7 998.8 1003.5 1002.5 983.1 YEAR-DAY 98-13 1-21 98-15 92-18 1-25 92-28 3-25 94- 4 0- 2 0- 1 0- 6 2-22 3-25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 814.5 813.4 812.6 813.5 812.9 810.0 808.5 810.5 813.3 816.7 817.1 816.5 813.3 MAX. QFE PRESSURE IN HPA 821.8 821.6 820.7 820.0 818.8 816.5 815.7 815.4 820.5 821.5 823.1 823.5 823.5 YEAR-DAY 87-17 91-15 2-11 88-12 98- 8 87-28 96- 3 87- 7 94-23 89-27 3-25 98-10 98-10 MIN. QFE PRESSURE IN HPA 804.7 805.4 805.3 806.3 805.9 804.2 803.1 805.2 805.5 810.9 810.4 808.1 803.1 YEAR-DAY 98-13 3-17 93-12 92-18 1-25 92-27 95-16 94- 1 0- 1 92- 7 0- 6 94- 4 95-16 MEAN QNH PRESSURE IN HPA 1016.6 1015.2 1014.4 1015.5 1014.7 1011.2 1009.4 1011.8 1015.2 1019.2 1019.8 1019.0 1015.2 MAX. QNH PRESSURE IN HPA 1025.4 1025.1 1024.0 1023.2 1021.8 1019.0 1018.1 1017.7 1023.8 1025.0 1026.9 1027.4 1027.4 YEAR-DAY 87-17 91-15 2-11 88-12 98- 8 87-28 96- 3 87- 7 94-23 89-27 3-25 98-10 98-10 MIN. QNH PRESSURE IN HPA 1004.9 1005.7 1005.6 1006.8 1006.3 1004.3 1003.0 1005.5 1005.8 1012.3 1011.7 1008.9 1003.0 YEAR-DAY 98-13 3-17 93-12 92-18 1-25 92-27 95-16 94- 1 0- 1 92- 7 0- 6 94- 4 95-16 MEAN QFF PRESSURE IN HPA 1017.4 1014.2 1010.1 1006.8 1001.6 994.3 990.9 994.8 1001.7 1010.9 1016.3 1018.2 1006.4 MAX. QFF PRESSURE IN HPA 1030.9 1030.5 1023.4 1017.6 1011.8 1006.8 1002.2 1003.1 1016.4 1020.5 1030.0 1032.5 1032.5 YEAR-DAY 92-10 91-15 3- 2 94- 5 89- 1 95- 1 87-29 96-31 94-22 87-17 87-30 87- 1 87- 1 MIN. QFF PRESSURE IN HPA 1004.0 1001.7 999.8 997.5 990.3 986.0 982.8 985.1 990.4 1001.5 1005.7 1003.7 982.8 YEAR-DAY 97-17 1-21 87-14 92-18 1-25 90-30 88-17 94- 3 0- 1 90- 1 0- 6 94- 4 88-17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 815.2 814.2 813.7 814.4 813.9 810.7 809.5 811.7 814.5 817.5 817.7 817.4 814.2 MAX. QFE PRESSURE IN HPA 821.7 821.0 821.5 821.1 820.0 816.2 816.3 816.4 821.5 822.0 824.3 824.8 824.8 YEAR-DAY 3-12 2- 6 2-11 3- 7 95-26 95- 1 96- 3 99-18 94-23 93-16 96-18 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 805.7 806.5 806.7 807.4 806.6 805.0 803.9 806.6 806.4 812.5 810.7 808.3 803.9 YEAR-DAY 97-17 0- 7 1-25 92-18 1-25 92-27 95-16 94- 1 0- 1 92- 6 0- 6 94- 4 95-16 MEAN QNH PRESSURE IN HPA 1017.4 1016.3 1015.7 1016.5 1015.9 1012.1 1010.6 1013.3 1016.7 1020.2 1020.5 1020.1 1016.3 MAX. QNH PRESSURE IN HPA 1025.2 1024.4 1025.0 1024.5 1023.2 1018.6 1018.8 1018.9 1025.0 1025.6 1028.3 1028.9 1028.9 YEAR-DAY 3-12 2- 6 2-11 3- 7 95-26 95- 1 96- 3 99-18 94-23 93-16 96-18 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 1006.1 1007.0 1007.3 1008.1 1007.2 1005.2 1003.9 1007.2 1006.9 1014.2 1012.1 1009.2 1003.9 YEAR-DAY 97-17 0- 7 1-25 92-18 1-25 92-27 95-16 94- 1 0- 1 92- 6 0- 6 94- 4 95-16 MEAN QFF PRESSURE IN HPA 1017.3 1014.0 1010.3 1006.4 1001.9 994.5 991.2 995.0 1001.7 1009.8 1015.1 1018.0 1006.3 MAX. QFF PRESSURE IN HPA 1030.3 1028.7 1025.0 1016.4 1012.0 1007.9 1000.7 1003.7 1014.0 1018.0 1028.2 1030.5 1030.5 YEAR-DAY 92-10 2- 5 3- 2 94- 5 95-26 95- 1 96- 3 92-31 94-23 95-29 3-25 3-13 3-13 MIN. QFF PRESSURE IN HPA 1005.6 1003.4 999.7 998.2 990.5 986.3 982.9 986.5 988.8 1001.9 1005.8 1004.3 982.9 YEAR-DAY 2-11 1-21 1-25 92-18 1-26 3-30 95-16 94- 3 0- 1 98- 1 0- 6 94- 3 95-16 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 814.9 814.1 813.7 814.3 813.8 810.8 809.6 811.7 814.5 817.5 817.6 817.1 814.1 MAX. QFE PRESSURE IN HPA 820.9 820.7 821.5 821.3 819.5 816.0 816.1 816.2 821.1 822.6 824.3 824.8 824.8 YEAR-DAY 3-12 2- 5 2-11 3- 7 95-26 98- 6 96- 3 99-18 94-23 93-16 96-18 98- 9 98- 9 MIN. QFE PRESSURE IN HPA 804.7 806.3 805.4 805.7 806.6 805.0 803.7 807.0 807.4 812.5 811.3 808.3 803.7 YEAR-DAY 97-25 98-15 1-25 2- 3 1-25 92-27 95-16 94- 1 0- 1 92- 6 0- 6 94- 4 95-16 MEAN QNH PRESSURE IN HPA 1017.1 1016.1 1015.6 1016.4 1015.8 1012.2 1010.8 1013.3 1016.6 1020.1 1020.3 1019.8 1016.2 MAX. QNH PRESSURE IN HPA 1024.3 1024.0 1025.0 1024.8 1022.6 1018.4 1018.5 1018.6 1024.5 1026.3 1028.3 1028.9 1028.9 YEAR-DAY 3-12 2- 5 2-11 3- 7 95-26 98- 6 96- 3 99-18 94-23 93-16 96-18 98- 9 98- 9 MIN. QNH PRESSURE IN HPA 1004.9 1006.8 1005.7 1006.1 1007.2 1005.2 1003.7 1007.6 1008.1 1014.2 1012.8 1009.2 1003.7 YEAR-DAY 97-25 98-15 1-25 2- 3 1-25 92-27 95-16 94- 1 0- 1 92- 6 0- 6 94- 4 95-16 MEAN QFF PRESSURE IN HPA 1016.2 1013.2 1009.8 1006.2 1001.8 994.5 991.1 994.7 1001.1 1009.3 1014.4 1016.9 1005.8 MAX. QFF PRESSURE IN HPA 1028.5 1026.6 1024.5 1016.8 1010.7 1006.7 1000.1 1003.7 1012.9 1018.1 1028.5 1029.0 1029.0 YEAR-DAY 92- 9 2- 5 92-12 94- 5 95-26 95- 1 0-25 92-31 94-22 95-29 96-18 3-13 3-13 MIN. QFF PRESSURE IN HPA 1004.9 1003.2 998.3 996.8 990.6 986.3 982.2 986.4 990.7 1001.6 1004.9 1002.9 982.2 YEAR-DAY 3-28 94-11 1-25 2- 3 1-26 3-25 95-16 94- 3 0- 1 98- 3 1-11 94- 3 95-16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 6.6 9.2 11.3 18.0 23.9 28.4 28.9 28.7 26.0 16.7 13.2 8.9 18.3 1988 5.0 7.0 12.4 17.1 24.5 28.7 31.3 29.1 25.3 19.2 12.4 8.2 18.4 1989 3.5 4.5 10.8 15.7 23.1 26.7 30.2 28.5 24.8 19.8 12.5 6.9 17.3 1990 4.4 7.0 12.1 17.0 25.3 29.4 30.3 30.2 26.4 19.1 13.2 8.0 18.5 1991 5.9 6.5 11.2 18.1 23.1 28.6 31.3 27.1 22.2 15.7 9.3 6.4 17.1 1992 0.8 3.7 6.7 12.8 18.2 25.0 27.7 25.8 19.9 14.7 10.0 5.0 14.2 1993 2.9 5.9 7.5 14.0 20.1 25.2 27.3 26.0 22.0 14.5 10.0 6.3 15.2 1994 3.7 4.9 9.3 15.6 19.8 26.2 29.4 28.4 20.3 15.2 11.0 3.9 15.6 1995 4.9 5.5 8.7 13.4 18.7 24.9 28.9 26.7 21.9 15.1 9.1 3.6 15.1 1996 1.4 6.3 9.2 14.3 20.1 26.0 26.5 25.7 24.6 16.0 7.8 5.0 15.2 1997 3.0 4.8 7.9 13.1 19.6 25.2 29.8 27.6 22.6 16.6 8.5 4.5 15.3 1998 2.9 5.3 10.3 15.6 20.9 25.5 28.8 27.3 23.0 16.2 10.3 8.2 16.2 1999 3.9 7.2 9.0 16.0 21.7 27.1 28.2 26.3 23.1 16.4 10.1 4.7 16.1 2000 3.8 5.0 9.2 17.7 23.0 25.8 26.9 25.8 23.1 15.5 8.4 5.7 15.8 2001 2.6 4.9 11.0 17.0 22.7 26.5 29.3 26.6 22.7 16.7 9.3 8.1 16.5 2002 3.5 6.1 10.6 14.9 21.2 25.6 28.4 27.7 23.5 17.1 8.9 5.0 16.0 2003 3.7 7.2 10.2 16.2 20.1 27.1 29.8 27.0 22.7 16.9 8.3 5.4 16.2 MEAN 3.7 6.0 9.8 15.7 21.5 26.6 29.0 27.3 23.2 16.5 10.1 6.1 16.3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 -5.3 -3.2 3.3 6.2 12.0 14.6 16.7 16.6 13.5 5.4 0.1 -3.0 6.4 1988 -3.6 -0.7 2.8 6.5 10.2 13.5 19.5 17.2 11.4 5.8 -0.9 0.7 6.9 1989 -6.0 -5.7 1.4 5.9 10.8 15.9 20.1 16.6 11.4 6.7 3.2 -1.6 6.6 1990 -3.1 -1.3 0.8 5.7 11.8 15.0 20.0 18.3 13.2 6.5 0.6 -4.0 7.0 1991 -1.8 -1.9 3.6 7.5 9.1 14.9 19.1 16.8 11.3 6.8 0.8 1.3 7.3 1992 -3.9 -3.6 -0.5 5.2 10.1 14.8 17.7 16.8 10.3 4.8 0.9 -0.6 6.0 1993 -2.9 -0.2 0.1 5.0 10.0 14.1 17.9 16.4 10.6 4.3 0.8 -3.3 6.1 1994 -4.5 -4.6 2.4 7.1 11.0 15.7 19.8 18.6 11.1 7.1 3.3 -2.8 7.0 1995 -2.8 -1.6 1.6 6.0 9.6 14.2 18.0 16.2 12.1 5.6 -0.9 -2.0 6.3 1996 -4.6 -0.7 3.5 5.5 10.1 15.6 18.4 15.9 12.1 4.8 -1.4 -4.5 6.2 1997 -4.8 -3.7 1.2 5.4 10.1 16.2 20.6 17.6 12.0 7.8 2.3 -1.6 6.9 1998 -3.4 -1.2 3.5 6.5 9.8 15.4 20.2 18.6 12.9 5.8 -0.0 -1.3 7.2 1999 -2.3 1.1 2.1 6.6 10.8 16.3 19.6 16.5 13.1 6.2 1.3 -5.1 7.2 2000 -2.6 -3.4 -0.6 7.7 11.5 15.1 18.6 15.7 13.7 5.7 1.6 -0.9 6.8 2001 -5.4 -4.0 2.6 6.3 12.2 16.9 21.0 17.1 12.9 6.6 -0.2 2.2 7.4 2002 -3.0 -1.3 2.4 6.3 9.6 14.8 19.0 17.9 12.9 6.9 0.4 -2.3 7.0 2003 -3.4 0.6 2.8 7.8 10.4 16.8 21.0 17.7 12.8 6.8 -1.1 -0.9 7.6 MEAN -3.7 -2.1 1.9 6.3 10.5 15.3 19.2 17.1 12.2 6.1 0.6 -1.7 6.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 14.0 15.8 16.5 24.0 29.9 33.9 34.5 34.2 32.3 23.0 20.0 15.4 24.5 1988 10.3 12.3 18.2 22.8 30.3 34.7 36.5 34.4 31.7 25.8 18.8 13.3 24.1 1989 9.0 10.2 16.0 20.5 28.1 34.4 34.6 33.3 30.6 25.9 17.8 11.9 22.7 1990 9.1 11.7 18.1 22.3 30.5 34.2 34.8 35.5 32.3 25.3 19.7 14.2 24.0 1991 10.6 11.6 16.1 23.4 28.5 33.7 36.8 34.9 31.1 24.1 17.9 12.3 23.4 1992 6.3 11.6 13.6 20.2 25.2 33.0 34.7 33.2 28.5 24.3 19.2 11.2 21.7 1993 8.8 11.9 14.3 21.6 28.1 33.5 34.3 33.5 30.7 23.7 19.1 16.3 23.0 1994 11.8 14.0 16.0 23.0 27.3 34.1 36.8 36.1 27.9 22.6 18.8 11.2 23.3 1995 12.6 12.1 15.5 20.5 26.5 32.5 36.7 34.6 30.5 24.3 19.5 9.6 22.9 1996 7.6 13.5 15.2 22.0 28.1 33.4 32.5 33.1 32.2 24.6 17.2 15.0 22.9 1997 10.9 13.2 15.0 20.3 27.2 32.5 37.2 35.4 31.6 24.8 15.0 11.4 22.9 1998 10.1 12.0 17.1 23.2 29.1 32.6 35.8 34.3 31.7 26.1 20.6 19.3 24.3 1999 10.8 13.9 15.9 24.0 30.0 35.2 35.2 33.5 31.8 25.9 18.9 15.6 24.2 2000 10.9 13.4 17.8 26.6 32.1 33.7 33.7 33.2 31.4 24.8 15.3 13.0 23.8 2001 11.5 13.5 19.1 26.1 31.0 34.1 36.0 34.1 31.2 26.5 18.7 14.7 24.7 2002 10.6 13.9 19.0 22.7 30.3 34.1 35.8 35.5 32.4 26.4 17.6 12.7 24.3 2003 11.6 14.6 17.7 24.5 28.0 34.9 37.2 34.6 31.3 26.0 17.9 12.9 24.3 MEAN 10.4 12.9 16.5 22.8 28.8 33.8 35.5 34.3 31.1 24.9 18.4 13.5 23.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 19.3 19.0 13.2 17.8 17.9 19.3 17.8 17.6 18.8 17.6 19.9 18.4 18.1 1988 13.9 13.0 15.4 16.3 20.1 21.2 17.0 17.2 20.3 20.0 19.7 12.6 17.2 1989 15.0 15.9 14.6 14.6 17.3 18.5 14.5 16.7 19.2 19.2 14.6 13.5 16.1 1990 12.2 13.0 17.3 16.6 18.7 19.2 14.8 17.2 19.1 18.8 19.1 18.2 17.0 1991 12.4 13.5 12.5 15.9 19.4 18.8 17.7 18.1 19.8 17.3 17.1 11.0 16.1 1992 10.2 15.2 14.1 15.0 15.1 18.2 17.0 16.4 18.2 19.5 18.3 11.8 15.7 1993 11.7 12.1 14.2 16.6 18.1 19.4 16.4 17.1 20.1 19.4 18.3 19.6 16.9 1994 16.3 18.6 13.6 15.9 16.3 18.4 17.0 17.5 16.8 15.5 15.5 14.0 16.3 1995 15.4 13.7 13.9 14.5 16.9 18.3 18.7 18.4 18.4 18.7 20.4 11.6 16.6 1996 12.2 14.2 11.7 16.5 18.0 17.8 14.1 17.2 20.1 19.8 18.6 19.5 16.7 1997 15.7 16.9 13.8 14.9 17.1 16.3 16.6 17.8 19.6 17.0 12.7 13.0 16.0 1998 13.5 13.2 13.6 16.7 19.3 17.2 15.6 15.7 18.8 20.3 20.6 20.6 17.1 1999 13.1 12.8 13.8 17.4 19.2 18.9 15.6 17.0 18.7 19.7 17.6 20.7 17.0 2000 13.5 16.8 18.4 18.9 20.6 18.6 15.1 17.5 17.7 19.1 13.7 13.9 17.0 2001 16.9 17.5 16.5 19.8 18.8 17.2 15.0 17.0 18.3 19.9 18.9 12.5 17.3 2002 13.6 15.2 16.6 16.4 20.7 19.3 16.8 17.6 19.5 19.5 17.2 15.0 17.3 2003 15.0 14.0 14.9 16.7 17.6 18.1 16.2 16.9 18.5 19.2 19.0 13.8 16.7 MEAN 14.1 15.0 14.6 16.5 18.3 18.5 16.3 17.2 18.9 18.8 17.8 15.2 16.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 4.3 6.3 9.9 15.1 21.0 24.3 25.6 25.4 22.9 14.2 10.0 6.2 15.4 1988 3.4 5.8 10.5 14.7 20.2 24.1 28.0 25.8 21.6 15.8 8.9 7.0 15.5 1989 1.5 2.2 8.7 13.2 19.5 25.2 27.3 25.0 21.0 16.3 10.5 5.2 14.6 1990 3.0 5.2 9.5 14.0 21.2 24.6 27.4 26.9 22.7 15.9 10.1 5.1 15.5 1991 4.4 4.9 9.8 15.4 18.8 24.3 28.0 25.9 21.2 15.4 9.4 6.8 15.4 1992 1.2 4.0 6.5 12.7 17.7 23.9 26.2 25.0 19.4 14.5 10.1 5.3 13.9 1993 3.0 5.9 7.2 13.3 19.1 23.8 26.1 24.9 20.7 14.0 10.0 6.5 14.5 1994 3.7 4.7 9.2 15.1 19.2 24.9 28.3 27.3 19.5 14.8 11.0 4.2 15.1 1995 4.9 5.3 8.5 13.3 18.0 23.3 27.3 25.4 21.3 14.9 9.3 3.8 14.6 1996 1.5 6.4 9.3 13.8 19.1 24.5 25.4 24.5 22.2 14.7 7.9 5.3 14.6 1997 3.1 4.8 8.1 12.9 18.6 24.4 28.9 26.5 21.8 16.3 8.6 4.9 14.9 1998 3.4 5.4 10.3 14.8 19.4 24.0 28.0 26.5 22.3 15.9 10.3 9.0 15.8 1999 4.2 7.5 9.0 15.3 20.4 25.8 27.4 25.0 22.5 16.1 10.1 5.3 15.7 2000 4.2 5.0 8.6 17.1 21.8 24.4 26.1 24.4 22.5 15.2 8.5 6.0 15.3 2001 3.0 4.7 10.9 16.2 21.6 25.5 28.5 25.6 22.0 16.6 9.3 8.4 16.0 2002 3.8 6.3 10.7 14.5 20.0 24.4 27.4 26.7 22.7 16.6 9.0 5.2 15.6 2003 4.1 7.6 10.2 16.1 19.2 25.9 29.1 26.2 22.1 16.4 8.4 6.0 15.9 MEAN 3.3 5.4 9.2 14.6 19.7 24.6 27.4 25.7 21.7 15.5 9.5 5.9 15.2 SD 1.08 1.28 1.21 1.28 1.20 0.70 1.11 0.86 1.05 0.85 0.86 1.36 1.07 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 -10.2 -7.5 -1.8 -0.6 5.0 10.0 10.6 11.8 6.4 -1.6 -6.0 -15.2 -15.2 DAY 8 24 22 8 9 2 4 27 30 18 30 3 1988 -13.0 -7.6 -4.0 -1.0 7.0 10.0 13.0 9.4 6.4 0.2 -9.6 -7.4 -13.0 DAY 4 7 16 3 14 1 1 12 30 30 24 30 1989 -12.6 -14.0 -4.0 -1.6 1.6 11.6 16.6 12.4 2.4 2.4 -4.8 -7.8 -14.0 DAY 19 15 1 1 3 1 22 31 25 23 26 23 1990 -10.6 -8.0 -8.0 -0.4 3.4 10.2 15.0 9.4 7.4 -1.4 -4.6 -16.6 -16.6 DAY 31 12 22 7 14 3 14 16 30 31 30 29 1991 -14.6 -12.6 -3.6 0.6 2.0 9.8 14.4 8.6 4.6 2.4 -4.6 -7.4 -14.6 DAY 7 16 8 12 24 13 29 26 29 31 17 30 1992 -17.8 -11.0 -11.0 -0.6 6.0 11.4 13.6 10.4 4.4 0.0 -6.6 -7.6 -17.8 DAY 29 17 13 8 5 1 23 22 11 26 19 7 1993 -12.0 -8.6 -7.5 -3.0 2.4 5.6 12.0 12.0 3.4 0.0 -6.8 -11.6 -12.0 DAY 16 8 23 1 8 5 25 5 30 8 30 13 1994 -14.6 -13.0 -3.0 -0.6 3.0 10.4 16.5 13.0 3.0 0.0 -3.4 -12.4 -14.6 DAY 12 21 18 6 3 6 1 21 22 14 12 8 1995 -8.0 -9.6 -5.6 -1.0 3.4 10.4 11.0 9.6 6.0 -2.6 -11.0 -6.4 -11.0 DAY 10 26 1 1 11 1 27 9 23 28 28 31 1996 -16.0 -10.0 -2.0 -2.4 4.0 11.2 13.0 10.0 7.0 -6.0 -6.8 -13.0 -16.0 DAY 16 25 1 7 1 19 6 4 30 21 13 4 1997 -10.4 -13.6 -7.0 -3.6 5.0 12.0 15.4 7.4 7.4 1.0 -4.0 -7.2 -13.6 DAY 7 8 1 14 3 8 4 31 29 18 25 29 1998 -11.4 -10.2 -6.4 0.0 4.0 9.6 16.0 11.0 7.0 0.0 -4.4 -8.0 -11.4 DAY 14 24 6 8 3 3 25 28 19 29 28 8 1999 -16.4 -7.6 -5.6 1.0 7.0 11.0 14.0 11.4 7.0 1.4 -6.2 -11.0 -16.4 DAY 5 1 8 16 5 1 22 27 30 24 30 19 2000 -9.4 -10.4 -8.6 1.6 7.0 10.0 13.6 11.0 9.4 2.0 -4.6 -8.0 -10.4 DAY 25 10 4 1 14 23 21 14 25 25 26 30 2001 -14.0 -10.6 -2.6 1.4 3.4 11.2 13.0 11.0 7.0 2.4 -5.6 -3.6 -14.0 DAY 30 1 12 11 7 25 31 16 26 12 26 29 2002 -10.4 -10.6 -4.0 0.0 3.4 9.6 12.6 13.0 9.0 1.6 -7.0 -15.8 -15.8 DAY 27 2 8 24 7 5 26 6 29 29 23 23 2003 -11.6 -7.8 -9.4 2.4 3.0 12.0 15.4 14.0 5.8 3.4 -8.6 -11.2 -11.6 DAY 2 1 3 3 3 8 3 15 29 25 24 14 1987-2003 -17.8 -14.0 -11.0 -3.6 1.6 5.6 10.6 7.4 2.4 -6.0 -11.0 -16.6 -17.8 YEAR-DAY 92-29 89-15 92-13 97-14 89- 3 93- 5 87- 4 97-31 89-25 96-21 95-28 90-29 92 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M TEMPERATURE RECORDS HIGHEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 18.6 20.2 20.5 30.6 32.5 37.2 37.4 36.0 35.6 29.0 24.0 22.2 37.4 DAY 20 2 6 27 27 9 10 28 6 3 3 19 1988 15.8 16.8 22.6 27.6 34.6 37.0 38.6 37.0 35.0 28.0 23.0 17.0 38.6 DAY 28 29 22 18 28 19 3 7 7 8 4 6 1989 13.8 16.4 21.2 26.8 34.4 37.8 38.0 35.0 33.2 30.0 22.2 17.6 38.0 DAY 22 28 4 19 28 26 9 12 6 10 1 1 1990 13.8 15.8 25.8 28.0 34.2 38.5 38.4 37.4 35.8 29.4 23.4 20.0 38.5 DAY 7 17 13 15 24 30 2 21 1 1 11 7 1991 16.0 17.4 22.8 29.0 33.6 36.4 40.0 37.6 37.4 26.5 23.0 18.4 40.0 DAY 21 27 22 27 31 4 11 11 9 10 1 9 1992 12.2 16.6 19.4 26.6 30.0 36.6 36.6 36.0 31.0 28.4 22.6 16.0 36.6 DAY 20 23 30 14 20 29 3 2 29 3 14 2 1993 15.8 17.2 19.6 27.0 33.6 36.8 37.4 36.0 33.4 28.8 24.4 20.6 37.4 DAY 28 28 19 18 27 20 9 20 3 1 1 21 1994 19.0 19.4 22.6 28.6 31.6 37.2 39.4 39.4 35.0 29.0 22.4 17.8 39.4 DAY 1 1 31 26 25 26 21 6 1 1 4 3 1995 15.4 16.4 21.0 25.4 29.5 36.0 39.0 36.4 33.2 28.8 24.0 14.8 39.0 DAY 17 22 25 19 7 13 14 24 12 2 1 2 1996 15.2 19.4 20.5 26.4 34.0 35.6 36.2 34.6 35.6 29.5 23.8 19.0 36.2 DAY 29 9 31 23 31 11 12 8 11 1 5 28 1997 15.0 20.4 19.6 26.0 32.8 36.4 38.8 38.0 34.4 29.8 20.0 14.2 38.8 DAY 1 21 23 28 27 16 21 15 2 2 6 4 1998 13.2 16.8 26.4 28.0 33.2 35.0 40.4 37.5 35.5 30.6 23.2 24.4 40.4 DAY 25 11 29 21 29 29 11 22 8 1 19 17 1999 17.0 18.4 24.2 28.6 33.0 37.4 38.4 35.0 34.6 28.0 22.5 21.0 38.4 DAY 1 8 26 30 31 30 9 15 2 6 8 26 2000 17.4 19.4 24.0 29.6 35.5 37.4 38.0 35.6 34.2 29.2 24.0 19.4 38.0 DAY 5 27 24 21 31 29 9 4 1 1 1 1 2001 16.6 19.2 24.2 29.6 35.4 37.0 39.6 36.0 34.8 30.4 24.4 18.2 39.6 DAY 16 20 31 26 16 28 10 9 3 1 6 7 2002 17.0 18.2 24.0 30.5 33.4 36.6 38.4 38.0 35.0 30.0 22.4 17.0 38.4 DAY 1 13 14 28 19 6 18 8 6 5 11 11 2003 18.0 18.6 22.6 28.8 31.4 37.6 38.4 37.4 33.2 29.0 24.6 18.6 38.4 DAY 13 23 12 28 18 25 25 1 10 2 1 19 1987-2003 19.0 20.4 26.4 30.6 35.5 38.5 40.4 39.4 37.4 30.6 24.6 24.4 40.4 YEAR-DAY 94- 1 97-21 98-29 87-27 0-31 90-30 98-11 94- 6 91- 9 98- 1 3- 1 98-17 98 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 8 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M 0C COOLING DEGREE DAYS (BASE 21) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 0.0 0.0 0.0 0.0 24.5 100.1 142.6 136.7 70.7 0.0 0.0 0.0 474.7 1988 0.0 0.0 0.0 0.0 10.6 92.9 209.7 149.6 38.3 0.0 0.0 0.0 501.1 1989 0.0 0.0 0.0 0.0 26.4 125.3 196.7 122.7 31.7 0.0 0.0 0.0 502.8 1990 0.0 0.0 0.0 0.0 27.0 113.1 198.0 182.8 67.6 0.0 0.0 0.0 588.5 1991 0.0 0.0 0.0 2.1 11.0 99.7 207.3 151.3 36.2 0.0 0.0 0.0 507.6 1992 0.0 0.0 0.0 0.0 1.9 87.8 162.3 123.9 2.2 0.0 0.0 0.0 378.2 1993 0.0 0.0 0.0 0.0 11.0 87.4 158.3 122.4 20.3 0.0 0.0 0.0 399.4 1994 0.0 0.0 0.0 0.0 15.6 116.7 225.3 195.6 29.3 0.0 0.0 0.0 582.7 1995 0.0 0.0 0.0 0.0 0.0 78.7 195.6 136.1 28.2 0.0 0.0 0.0 438.7 1996 0.0 0.0 0.0 0.0 11.9 106.2 137.7 108.7 45.0 0.0 0.0 0.0 409.6 1997 0.0 0.0 0.0 0.0 7.1 100.7 244.2 170.7 34.4 0.1 0.0 0.0 557.2 1998 0.0 0.0 0.0 0.0 8.1 91.4 216.9 169.1 49.8 2.3 0.0 0.0 537.7 1999 0.0 0.0 0.0 0.0 12.1 143.5 198.8 124.7 55.7 0.0 0.0 0.0 535.0 2000 0.0 0.0 0.0 0.9 36.6 103.5 159.2 106.3 57.1 0.0 0.0 0.0 463.8 2001 0.0 0.0 0.0 0.0 43.0 135.3 232.9 143.4 51.2 1.6 0.0 0.0 607.5 2002 0.0 0.0 0.0 0.0 14.6 103.2 198.5 176.5 56.2 0.1 0.0 0.0 549.1 2003 0.0 0.0 0.0 0.0 8.1 145.8 251.0 161.0 42.9 0.0 0.0 0.0 608.9 MEAN 0.0 0.0 0.0 0.2 15.9 107.7 196.2 146.0 42.2 0.2 0.0 0.0 508.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 9 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M 0C HEATING DEGREE DAYS (BASE 18) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 423.7 327.2 251.0 98.1 1.8 0.0 0.0 0.0 1.3 123.2 239.0 366.7 1832.0 1988 453.7 354.2 232.8 100.3 0.0 0.0 0.0 0.0 1.6 68.5 272.1 340.6 1823.8 1989 511.4 441.6 288.3 143.8 28.4 0.0 0.0 0.0 9.0 56.0 226.0 397.7 2102.2 1990 466.3 358.2 264.4 121.2 3.5 0.0 0.0 0.0 0.0 75.2 235.5 400.6 1924.9 1991 422.2 367.5 253.3 89.6 23.2 0.0 0.0 0.0 11.2 79.3 259.4 346.4 1852.0 1992 521.0 406.2 355.0 158.5 43.0 0.0 0.0 0.0 7.2 108.5 238.2 393.4 2231.0 1993 465.4 339.9 334.9 141.4 22.6 0.2 0.0 0.0 3.4 124.8 241.4 356.8 2030.7 1994 444.4 373.2 272.4 95.6 26.1 0.0 0.0 0.0 28.1 102.6 208.8 428.8 1979.9 1995 405.7 356.3 292.9 142.2 19.9 0.9 0.0 0.0 0.8 102.1 261.3 440.8 2023.0 1996 511.1 337.2 268.6 126.7 15.0 0.0 0.0 0.0 0.0 108.4 302.8 393.8 2063.6 1997 463.0 370.9 306.7 154.2 27.1 0.0 0.0 0.0 0.0 67.1 280.8 405.5 2075.4 1998 453.8 353.1 241.0 98.6 20.3 0.0 0.0 0.0 0.0 77.1 231.4 279.0 1754.3 1999 426.6 294.5 279.3 84.8 1.8 0.0 0.0 0.0 1.2 59.5 237.2 394.9 1779.8 2000 429.1 375.8 291.8 44.0 0.0 0.0 0.0 0.0 0.0 89.4 285.6 371.2 1887.0 2001 464.0 371.3 220.9 61.1 3.6 0.0 0.0 0.0 0.5 50.9 261.9 297.0 1731.2 2002 439.7 328.2 226.0 111.6 8.1 0.0 0.0 0.0 0.0 53.1 270.4 395.8 1832.9 2003 430.9 290.7 240.3 65.1 16.0 0.0 0.0 0.0 0.9 57.5 287.5 371.7 1760.6 MEAN 454.8 355.7 271.8 108.0 15.3 0.1 0.0 0.0 3.8 82.5 255.3 375.4 1922.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 10 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 ***** -5.0 -2.1 -1.6 3.2 5.0 8.9 6.1 3.1 -1.0 -4.8 -10.0 ****** 1988 -9.0 -6.8 -4.9 -1.6 -0.9 0.8 6.4 3.9 1.1 -3.1 -5.4 -4.0 -2.0 1989 -11.2 -12.0 -5.7 -3.4 -0.8 1.3 5.1 4.4 1.6 0.1 -1.5 -5.3 -2.3 1990 -6.8 -5.5 -5.5 -1.5 2.9 2.6 6.1 6.8 3.2 1.2 -1.9 -6.6 -0.4 1991 -3.4 -5.4 0.1 1.3 0.8 3.1 5.5 1.8 -5.1 -0.3 -2.6 -0.3 -0.4 1992 -5.0 -9.1 -6.4 -1.1 3.4 1.8 2.7 0.3 -4.9 -5.3 -8.0 -1.8 -2.8 1993 -3.7 -2.0 -2.7 -0.6 1.5 -2.1 -1.6 2.7 -4.2 -5.0 -5.1 -8.6 -2.6 1994 -8.3 -10.8 -1.9 -1.3 1.2 0.9 5.8 5.7 0.4 1.3 -2.2 -6.5 -1.3 1995 -5.4 -4.6 -3.6 0.4 1.3 4.0 3.8 -1.9 -1.6 -2.9 -9.1 -1.5 -1.8 1996 -4.4 -2.3 0.9 -0.4 2.0 1.7 0.9 1.6 0.1 -6.5 -8.1 -9.1 -2.0 1997 -7.3 -9.0 -3.6 -0.5 -0.8 2.2 4.1 0.8 -4.2 -1.1 0.8 -2.4 -1.7 1998 -4.6 -4.2 -1.1 -1.4 -1.9 -2.0 3.7 0.6 -2.5 -6.6 -9.4 -10.8 -3.3 1999 -5.6 -1.1 -4.4 -2.8 -3.6 -2.7 2.6 -2.4 -2.6 -6.0 -4.9 -11.8 -3.8 2000 -5.7 -8.3 -10.1 -5.3 -4.1 -4.1 -2.2 -4.7 -3.1 -4.5 -1.6 -3.5 -4.8 2001 -9.5 -10.4 -4.8 -7.1 -4.0 -2.5 0.7 -3.4 -2.9 -6.0 -7.7 0.6 -4.7 2002 -5.2 -6.4 -5.4 -0.3 -4.2 -2.1 0.9 1.4 -2.4 -6.4 -3.6 -5.3 -3.3 2003 -6.6 -3.8 -2.4 -0.4 -2.4 -0.7 4.4 -0.5 -3.7 -5.6 -8.7 -3.7 -2.8 MEAN -6.4 -6.3 -3.7 -1.6 -0.4 0.4 3.4 1.4 -1.6 -3.4 -4.9 -5.3 -2.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 11 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 ***** 3.38 4.30 4.35 6.12 7.03 9.26 7.54 6.11 4.62 3.43 2.39 ***** 1988 2.55 3.00 3.46 4.36 4.56 5.07 7.69 6.47 5.36 3.80 3.28 3.82 4.45 1989 2.14 2.10 3.31 3.87 4.57 5.25 6.96 6.68 5.48 4.86 4.44 3.35 4.42 1990 3.03 3.40 3.32 4.42 6.07 5.76 7.50 7.85 6.24 5.36 4.27 3.00 5.02 1991 4.11 3.47 5.07 5.38 5.15 6.07 7.27 5.86 3.49 4.79 3.98 4.87 4.96 1992 3.48 2.65 3.34 4.62 6.24 5.55 6.01 5.21 3.46 3.26 2.69 4.36 4.24 1993 3.90 4.40 4.21 4.80 5.39 4.24 4.37 5.95 3.65 3.40 3.49 2.61 4.20 1994 2.71 2.26 4.37 4.54 5.41 5.18 7.56 7.65 5.16 5.44 4.24 3.24 4.81 1995 3.31 3.74 4.08 5.13 5.46 6.45 6.52 4.29 4.34 3.99 2.53 4.37 4.52 1996 3.57 4.24 5.29 4.89 5.60 5.75 5.16 5.47 4.89 3.21 2.72 2.48 4.44 1997 2.91 2.68 3.93 5.04 4.57 5.74 6.62 5.37 3.57 4.56 5.11 4.01 4.51 1998 3.56 3.80 4.79 4.62 4.23 4.17 6.32 5.23 4.20 2.99 2.39 2.27 4.05 1999 3.39 4.70 3.70 4.05 3.70 3.97 5.94 4.06 4.05 3.07 3.45 2.10 3.85 2000 3.45 2.66 2.38 3.32 3.59 3.57 4.17 3.44 3.90 3.55 4.40 3.81 3.52 2001 2.43 2.37 3.58 2.94 3.67 4.42 5.38 4.01 3.91 3.10 2.83 5.12 3.65 2002 3.45 3.26 3.54 4.85 3.63 4.18 5.13 5.43 4.19 2.98 3.80 3.49 3.99 2003 3.12 3.85 4.35 4.93 4.14 4.57 6.94 4.78 3.71 3.17 2.60 3.85 4.17 MEAN 3.19 3.29 3.94 4.48 4.83 5.12 6.40 5.61 4.45 3.89 3.51 3.48 4.35 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 12 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 ***** 4.41 5.58 5.66 7.94 9.07 11.90 9.72 7.92 6.03 4.48 3.13 ***** 1988 3.32 3.91 4.50 5.67 5.93 6.56 9.87 8.33 6.95 4.96 4.30 4.97 5.77 1989 2.78 2.74 4.29 5.03 5.94 6.80 8.98 8.62 7.11 6.34 5.80 4.37 5.73 1990 3.95 4.42 4.33 5.74 7.84 7.44 9.63 10.11 8.07 6.98 5.57 3.91 6.50 1991 5.34 4.51 6.57 6.99 6.66 7.84 9.34 7.55 4.54 6.25 5.20 6.34 6.43 1992 4.52 3.44 4.34 5.99 8.08 7.17 7.75 6.74 4.50 4.26 3.53 5.67 5.50 1993 5.07 5.72 5.46 6.24 6.99 5.50 5.65 7.70 4.75 4.44 4.56 3.41 5.46 1994 3.53 2.94 5.67 5.89 7.01 6.68 9.69 9.82 6.70 7.09 5.54 4.23 6.23 1995 4.32 4.86 5.29 6.66 7.09 8.33 8.37 5.56 5.64 5.21 3.31 5.69 5.86 1996 4.64 5.50 6.84 6.35 7.26 7.43 6.68 7.08 6.34 4.20 3.55 3.25 5.76 1997 3.79 3.49 5.09 6.53 5.94 7.42 8.51 6.94 4.64 5.95 6.65 5.23 5.85 1998 4.63 4.94 6.22 6.00 5.50 5.41 8.14 6.76 5.46 3.90 3.13 2.98 5.26 1999 4.41 6.10 4.80 5.27 4.81 5.14 7.64 5.26 5.26 4.01 4.50 2.75 5.00 2000 4.48 3.46 3.10 4.32 4.66 4.62 5.39 4.46 5.07 4.63 5.74 4.96 4.57 2001 3.17 3.08 4.65 3.83 4.76 5.70 6.93 5.20 5.08 4.05 3.70 6.68 4.74 2002 4.49 4.24 4.60 6.28 4.71 5.41 6.64 7.01 5.46 3.90 4.96 4.54 5.19 2003 4.06 5.00 5.64 6.41 5.38 5.91 8.90 6.18 4.82 4.15 3.40 5.03 5.41 MEAN 4.16 4.28 5.12 5.82 6.27 6.61 8.24 7.24 5.78 5.08 4.58 4.54 5.64 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 13 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 ***** 8.19 8.34 16.58 23.07 31.33 29.75 31.14 27.69 14.56 12.16 9.25 ***** 1988 5.88 6.64 10.72 15.01 26.43 34.90 37.42 33.42 27.56 18.79 11.45 6.43 19.55 1989 5.56 6.44 9.50 13.97 24.23 36.38 35.27 31.61 26.15 18.28 9.43 6.08 18.57 1990 4.81 6.07 11.00 15.00 25.99 35.19 34.73 34.31 28.58 16.65 10.77 7.80 19.24 1991 4.43 5.78 7.42 15.18 23.09 32.91 38.16 30.17 24.38 12.70 7.47 3.85 17.13 1992 2.35 5.23 6.08 9.90 13.93 26.32 30.86 27.91 20.30 14.02 9.85 3.48 14.19 1993 2.92 4.04 5.48 10.78 18.17 28.65 32.11 27.47 23.61 13.53 8.89 7.12 15.23 1994 5.15 6.59 6.64 13.01 17.60 29.20 32.91 30.78 18.63 11.04 8.41 4.54 15.38 1995 4.90 4.68 6.61 9.49 15.64 25.12 33.49 31.33 22.51 13.59 9.74 2.54 14.97 1996 2.70 4.64 5.24 11.01 17.73 27.71 28.98 27.40 26.77 16.00 8.17 6.39 15.23 1997 4.37 6.04 6.10 9.34 18.31 26.20 35.30 31.86 24.61 14.35 5.02 3.63 15.43 1998 3.38 4.54 7.26 12.95 20.98 28.72 33.08 31.00 24.51 16.31 10.73 9.27 16.90 1999 4.23 4.52 7.53 14.18 22.78 32.68 32.19 30.34 24.94 16.27 8.92 6.94 17.13 2000 4.12 6.12 9.66 17.60 25.71 30.53 31.65 30.27 24.92 14.38 5.95 4.89 17.15 2001 4.91 6.43 9.44 17.21 24.75 30.53 35.44 31.28 24.32 16.65 9.18 4.61 17.90 2002 3.95 5.88 9.11 12.06 22.57 29.31 33.74 31.91 25.50 17.30 7.43 4.90 16.97 2003 4.51 5.85 7.62 13.26 19.59 31.71 34.64 31.08 24.54 16.59 8.79 4.62 16.90 MEAN 4.26 5.75 7.87 13.33 21.21 30.44 33.51 30.78 24.68 15.35 8.96 5.67 16.82 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 14 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 *** 41 45 32 29 24 31 26 24 34 31 28 *** 1988 40 41 34 32 21 18 23 21 22 24 30 47 29 1989 38 33 36 31 22 17 22 22 23 28 42 46 30 1990 49 46 33 33 25 19 23 24 23 32 38 38 32 1991 56 47 51 37 25 21 22 22 18 37 47 67 38 1992 69 45 45 44 43 25 22 21 20 27 31 66 38 1993 67 62 55 42 33 19 16 24 19 29 38 39 37 1994 46 36 53 36 34 21 25 26 29 43 45 53 37 1995 53 54 49 48 36 29 23 17 23 33 30 73 39 1996 70 60 62 43 35 24 20 23 22 24 36 39 38 1997 53 43 51 47 29 25 22 20 18 34 62 64 39 1998 63 56 52 38 25 18 22 20 21 23 27 29 33 1999 56 62 46 32 21 16 21 16 20 23 38 34 32 2000 58 43 28 24 18 15 16 14 19 29 56 56 31 2001 47 39 39 22 20 18 18 16 20 23 34 64 30 2002 58 47 40 42 22 18 18 20 19 21 45 52 34 2003 55 52 48 41 25 18 23 18 19 23 33 57 34 MEAN 55 47 45 37 27 20 22 21 21 29 39 50 34 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 15 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 69 71 73 60 48 37 45 43 39 52 52 45 53 1988 58 63 55 55 41 28 35 32 31 39 46 69 46 1989 63 52 57 57 38 25 30 29 32 38 65 72 47 1990 75 73 59 62 43 26 31 33 34 50 57 59 50 1991 75 74 80 62 41 30 34 34 32 57 68 88 56 1992 88 71 74 75 70 40 33 34 32 41 49 87 58 1993 87 83 83 68 57 34 27 35 31 48 62 63 57 1994 70 62 79 59 56 32 41 41 44 69 72 78 59 1995 80 79 75 74 58 45 37 30 38 53 52 91 59 1996 91 85 89 74 60 41 30 36 36 44 57 60 59 1997 76 71 81 76 51 40 34 33 29 53 85 89 60 1998 88 84 83 64 44 29 34 31 35 38 43 47 52 1999 79 88 74 55 37 27 33 26 34 36 61 53 50 2000 80 75 51 42 31 25 23 23 32 47 80 79 49 2001 74 68 67 41 34 30 29 26 32 39 57 85 49 2002 82 74 70 72 39 30 29 32 31 34 70 76 53 2003 80 83 80 71 43 30 37 29 31 38 56 81 55 MEAN 77 74 72 63 47 32 33 32 34 46 61 72 54 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 16 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 20 25 28 18 19 18 24 18 16 24 21 18 21 1988 27 26 21 19 12 13 16 16 15 16 21 32 20 1989 21 20 23 19 15 12 17 17 18 22 27 30 20 1990 32 29 20 20 17 15 18 19 17 22 26 25 22 1991 41 30 33 23 17 16 14 13 10 22 29 43 24 1992 46 21 23 21 22 13 14 12 11 15 16 42 21 1993 43 36 31 21 16 9 10 15 10 15 20 19 20 1994 25 16 28 18 18 12 14 15 17 24 23 27 20 1995 28 33 27 24 18 17 13 8 13 18 14 47 22 1996 44 34 35 22 16 13 13 14 12 13 19 21 21 1997 31 18 25 24 14 14 12 10 10 19 38 35 21 1998 34 30 27 17 11 10 13 11 11 11 13 14 17 1999 31 35 24 14 10 8 13 9 11 13 20 16 17 2000 34 19 12 11 9 8 10 8 10 15 32 32 17 2001 22 17 19 10 9 10 10 8 11 11 16 39 15 2002 31 22 16 19 9 10 11 12 11 12 26 29 17 2003 28 25 23 16 12 10 12 10 10 12 14 32 17 MEAN 32 26 24 19 14 12 14 13 13 17 22 29 20 RH=0 =====> RELATIVE HUMIDITY < 0.5% =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 17 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF RELATIVE HUMIDITY AT 03 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 69 71 71 60 48 36 43 43 39 50 52 44 52 1988 57 62 54 55 41 27 35 31 31 39 46 66 45 1989 62 49 56 55 38 25 29 28 31 38 64 71 46 1990 73 70 58 60 39 26 30 33 33 49 53 58 49 1991 73 74 79 62 41 30 34 32 29 53 66 84 55 1992 83 67 67 68 66 38 31 33 31 41 48 81 55 1993 83 81 75 64 53 31 26 34 29 47 60 59 54 1994 63 56 75 56 54 31 39 39 43 67 68 71 55 1995 76 74 72 70 54 43 35 27 37 50 50 87 56 1996 85 83 85 67 56 37 29 35 36 44 55 56 56 1997 72 65 76 71 46 37 33 32 28 49 83 84 56 1998 84 80 76 60 40 27 31 30 34 37 43 45 49 1999 74 83 71 53 36 26 32 26 34 36 59 50 48 2000 75 73 48 41 29 23 22 22 32 46 77 75 47 2001 70 63 63 39 32 28 28 26 31 39 54 82 46 2002 77 71 64 68 37 27 27 31 31 33 67 74 51 2003 72 79 74 65 41 28 35 29 30 38 53 78 52 MEAN 73 71 68 60 44 31 32 31 33 44 59 69 51 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 18 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF RELATIVE HUMIDITY AT 09 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 27 31 35 22 22 20 26 20 20 29 24 22 25 1988 33 34 26 24 15 14 20 18 20 18 24 39 24 1989 30 27 31 22 18 15 19 20 21 25 33 36 25 1990 41 38 26 26 20 17 21 21 20 25 33 30 27 1991 48 37 42 29 20 17 18 15 13 27 35 50 29 1992 55 28 30 26 28 15 16 13 14 18 19 51 26 1993 52 45 38 27 20 11 11 17 13 18 25 24 25 1994 35 24 36 23 22 14 17 19 19 30 29 36 25 1995 36 40 33 32 21 19 15 11 14 21 17 58 26 1996 56 42 45 28 18 14 14 16 15 17 23 25 26 1997 38 28 32 29 15 16 14 14 12 25 43 44 26 1998 45 37 32 21 13 11 15 13 13 13 15 17 20 1999 42 45 32 17 12 9 15 10 13 14 24 19 21 2000 42 25 17 13 10 10 11 9 12 19 38 39 20 2001 28 22 26 11 12 12 12 10 13 14 20 48 19 2002 38 31 21 24 11 11 13 14 13 14 30 35 21 2003 38 31 30 23 14 12 14 12 12 14 19 38 21 MEAN 40 33 31 23 17 14 16 15 15 20 27 36 24 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 19 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M AVERAGE OF RELATIVE HUMIDITY AT 15 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 34 32 36 23 23 22 28 22 19 32 27 23 27 1988 34 33 28 26 14 14 17 16 16 20 27 45 24 1989 31 25 27 25 17 14 18 19 19 23 33 37 24 1990 40 35 25 25 21 16 20 20 20 30 37 36 27 1991 52 41 43 27 19 18 17 16 13 28 37 58 31 1992 62 30 30 31 31 17 17 15 15 20 24 58 29 1993 57 52 42 28 20 11 11 18 13 22 28 28 28 1994 35 22 38 26 24 15 16 18 24 32 34 45 27 1995 40 42 35 35 25 20 15 11 15 25 22 66 29 1996 60 46 47 28 23 16 16 16 16 21 29 31 29 1997 42 29 37 32 19 16 14 13 13 27 52 56 29 1998 47 43 37 27 15 12 16 14 13 17 20 23 24 1999 44 48 32 21 12 10 16 12 14 18 29 29 24 2000 47 28 17 14 12 11 12 10 13 21 48 47 23 2001 35 27 25 13 13 13 12 11 15 17 26 57 22 2002 48 32 27 28 12 12 13 14 14 16 36 42 25 2003 46 36 33 25 17 12 15 13 13 17 24 50 25 MEAN 44 35 33 26 19 15 16 15 16 23 31 43 26 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 20 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M NO. OF DAYS WITH MAXIMUM TEMPERATURE EQUAL 30 AND ABOVE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 0 0 0 2 15 29 30 31 27 0 0 0 134 1988 0 0 0 0 18 30 31 31 23 0 0 0 133 1989 0 0 0 0 9 30 31 31 19 1 0 0 121 1990 0 0 0 0 21 28 31 31 22 0 0 0 133 1991 0 0 0 0 9 27 30 31 22 0 0 0 119 1992 0 0 0 0 2 30 31 29 10 0 0 0 102 1993 0 0 0 0 11 29 31 31 20 0 0 0 122 1994 0 0 0 0 10 30 31 31 6 0 0 0 108 1995 0 0 0 0 0 24 31 31 15 0 0 0 101 1996 0 0 0 0 9 29 30 30 23 0 0 0 121 1997 0 0 0 0 6 27 31 31 27 0 0 0 122 1998 0 0 0 0 17 29 31 31 25 2 0 0 135 1999 0 0 0 0 18 30 31 31 25 0 0 0 135 2000 0 0 0 0 28 26 31 30 22 0 0 0 137 2001 0 0 0 0 21 30 31 31 20 2 0 0 135 2002 0 0 0 2 18 30 31 31 27 1 0 0 140 2003 0 0 0 0 8 30 31 31 24 0 0 0 124 MEAN 0.0 0.0 0.0 0.2 12.9 28.7 30.8 30.8 21.0 0.4 0.0 0.0 124.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 21 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M NO. OF DAYS WITH MAXIMUM TEMPERATURE EQUAL 00 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 0 0 0 0 0 0 0 0 0 0 0 0 0 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 1990 0 0 0 0 0 0 0 0 0 0 0 0 0 1991 0 0 0 0 0 0 0 0 0 0 0 1 1 1992 1 0 0 0 0 0 0 0 0 0 0 0 1 1993 1 0 0 0 0 0 0 0 0 0 0 0 1 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 3 0 0 0 0 0 0 0 0 0 0 0 3 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 22 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL 21 AND ABOVE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 0 0 0 0 0 0 1 3 0 0 0 0 4 1988 0 0 0 0 0 0 8 3 0 0 0 0 11 1989 0 0 0 0 0 1 12 1 0 0 0 0 14 1990 0 0 0 0 0 1 10 4 1 0 0 0 16 1991 0 0 0 0 0 1 8 2 0 0 0 0 11 1992 0 0 0 0 0 2 2 3 0 0 0 0 7 1993 0 0 0 0 0 0 4 1 0 0 0 0 5 1994 0 0 0 0 0 0 9 6 0 0 0 0 15 1995 0 0 0 0 0 0 4 0 0 0 0 0 4 1996 0 0 0 0 0 0 5 0 0 0 0 0 5 1997 0 0 0 0 0 4 15 3 0 0 0 0 22 1998 0 0 0 0 0 0 11 4 0 0 0 0 15 1999 0 0 0 0 0 1 14 0 0 0 0 0 15 2000 0 0 0 0 0 1 9 0 0 0 0 0 10 2001 0 0 0 0 0 3 20 2 0 0 0 0 25 2002 0 0 0 0 0 1 8 2 0 0 0 0 11 2003 0 0 0 0 0 3 19 1 0 0 0 0 23 MEAN 0.0 0.0 0.0 0.0 0.0 1.1 9.4 2.1 0.1 0.0 0.0 0.0 12.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 23 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL -4 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 23 13 0 0 0 0 0 0 0 0 5 10 51 1988 15 7 1 0 0 0 0 0 0 0 7 2 32 1989 25 20 2 0 0 0 0 0 0 0 1 11 59 1990 15 10 2 0 0 0 0 0 0 0 1 16 44 1991 11 10 0 0 0 0 0 0 0 0 1 7 29 1992 18 15 8 0 0 0 0 0 0 0 3 7 51 1993 13 7 4 0 0 0 0 0 0 0 5 12 41 1994 17 18 0 0 0 0 0 0 0 0 0 14 49 1995 14 11 3 0 0 0 0 0 0 0 10 10 48 1996 17 6 0 0 0 0 0 0 0 2 6 19 50 1997 20 17 3 0 0 0 0 0 0 0 1 6 47 1998 14 11 3 0 0 0 0 0 0 0 1 11 40 1999 10 2 1 0 0 0 0 0 0 0 2 20 35 2000 13 18 9 0 0 0 0 0 0 0 1 9 50 2001 23 20 0 0 0 0 0 0 0 0 6 0 49 2002 14 12 3 0 0 0 0 0 0 0 5 12 46 2003 15 6 2 0 0 0 0 0 0 0 10 6 39 MEAN 16.3 11.9 2.4 0.0 0.0 0.0 0.0 0.0 0.0 0.1 3.8 10.1 44.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 24 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL 00 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 29 25 7 1 0 0 0 0 0 3 16 24 105 1988 24 16 11 2 0 0 0 0 0 0 12 16 81 1989 28 23 14 4 0 0 0 0 0 0 6 21 96 1990 26 19 16 1 0 0 0 0 0 1 11 28 102 1991 19 19 8 0 0 0 0 0 0 0 11 12 69 1992 24 22 17 1 0 0 0 0 0 1 12 16 93 1993 23 16 18 1 0 0 0 0 0 2 13 26 99 1994 26 23 8 1 0 0 0 0 0 1 7 23 89 1995 25 20 13 1 0 0 0 0 0 4 17 25 105 1996 29 15 5 2 0 0 0 0 0 5 21 29 106 1997 27 20 13 4 0 0 0 0 0 0 8 24 96 1998 24 17 10 1 0 0 0 0 0 1 16 20 89 1999 19 11 11 0 0 0 0 0 0 0 11 28 80 2000 20 22 17 0 0 0 0 0 0 0 13 17 89 2001 28 23 5 0 0 0 0 0 0 0 17 11 84 2002 22 18 7 1 0 0 0 0 0 0 15 20 83 2003 25 15 10 0 0 0 0 0 0 0 17 20 87 MEAN 24.6 19.1 11.2 1.2 0.0 0.0 0.0 0.0 0.0 1.1 13.1 21.2 91.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 25 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MONTHLY TOTAL OF PRECIPITATION IN MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 1.0 3.0 32.2 14.0 0.6 0.0 3.0 0.0 0.0 6.0 0.0 7.0 66.8 1988 69.0 53.0 34.0 21.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 32.1 220.1 1989 2.0 0.0 37.2 19.6 0.0 0.0 0.6 0.0 0.0 0.0 17.0 26.0 102.4 1990 40.5 32.5 8.0 22.0 0.0 0.0 3.0 0.0 0.0 0.0 1.0 1.0 108.0 1991 50.8 18.4 33.0 8.0 0.0 0.0 0.0 0.0 0.0 8.0 14.0 21.3 153.5 1992 58.8 0.0 31.2 14.9 71.5 0.0 0.0 0.0 0.0 0.0 0.0 103.2 279.6 1993 42.8 92.4 25.1 12.3 2.0 0.0 0.0 0.2 0.0 0.6 0.4 3.8 179.6 1994 14.0 0.0 101.6 3.6 37.0 0.0 1.0 3.0 3.0 8.5 4.0 24.8 200.5 1995 15.5 65.4 51.0 46.2 6.5 2.2 0.0 0.0 0.0 4.7 0.0 72.4 263.9 1996 35.6 41.5 59.8 23.5 4.0 0.3 1.0 0.0 0.0 0.0 1.3 1.2 168.2 1997 37.8 2.1 52.5 33.9 0.4 2.3 0.0 0.0 0.0 19.5 15.7 24.2 188.4 1998 39.0 47.1 21.8 5.1 0.0 0.0 0.4 1.6 0.0 0.0 0.0 0.0 115.0 1999 31.2 102.5 40.3 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.4 1.0 175.7 2000 72.4 1.0 2.0 1.0 0.0 0.0 0.0 0.0 0.0 2.8 33.0 32.9 145.1 2001 1.8 11.0 11.8 0.0 2.0 1.2 0.0 0.1 0.0 0.0 0.8 73.4 102.1 2002 25.2 22.6 17.3 32.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.6 103.3 2003 32.8 24.1 57.2 35.0 0.0 0.0 0.0 0.6 0.0 0.0 0.0 44.0 193.7 MEAN 33.5 30.4 36.2 17.2 7.3 0.4 0.5 0.3 0.2 2.9 5.9 27.8 162.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 26 LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M GREATEST DAILY OF PRECIPITATION IN MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 1.0 3.0 16.0 11.0 0.6 0.0 3.0 0.0 0.0 6.0 0.0 7.0 16.0 DAY 8 11 30 5 8 ** 28 ** ** 27 ** 29 1988 21.0 27.0 19.0 12.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 17.0 27.0 DAY 8 25 24 26 ** ** ** ** ** ** 30 27 1989 1.0 0.0 13.0 6.0 0.0 0.0 0.6 0.0 0.0 0.0 5.0 15.0 15.0 DAY 3 ** 19 30 ** ** 17 ** ** ** 8 5 1990 14.0 15.0 7.0 12.0 0.0 0.0 3.0 0.0 0.0 0.0 1.0 1.0 15.0 DAY 28 6 18 4 ** ** 14 ** ** ** 29 22 1991 10.0 9.0 8.0 4.0 0.0 0.0 0.0 0.0 0.0 8.0 14.0 7.0 14.0 DAY 15 22 28 1 ** ** ** ** ** 16 24 19 1992 22.0 0.0 22.0 8.0 41.0 0.0 0.0 0.0 0.0 0.0 0.0 34.4 41.0 DAY 21 ** 31 27 11 ** ** ** ** ** ** 22 1993 14.0 43.0 8.0 11.0 2.0 0.0 0.0 0.2 0.0 0.6 0.4 3.8 43.0 DAY 4 4 7 28 7 ** ** 14 ** 25 25 25 1994 9.0 0.0 25.0 2.4 32.0 0.0 1.0 3.0 2.0 7.0 2.4 17.0 32.0 DAY 24 ** 1 2 6 ** 3 13 8 8 17 4 1995 6.0 42.0 19.0 20.0 4.0 2.0 0.0 0.0 0.0 3.2 0.0 18.0 42.0 DAY 13 6 14 23 25 1 ** ** ** 22 ** 6 1996 13.8 19.0 13.0 14.3 2.0 0.3 1.0 0.0 0.0 0.0 1.0 1.2 19.0 DAY 12 5 4 16 22 13 7 ** ** ** 29 15 1997 19.1 2.0 19.4 10.4 0.4 1.0 0.0 0.0 0.0 17.0 12.0 12.0 19.4 DAY 17 27 25 7 9 23 ** ** ** 31 27 21 1998 21.0 33.0 6.4 3.5 0.0 0.0 0.4 1.0 0.0 0.0 0.0 0.0 33.0 DAY 2 12 10 23 ** ** 29 7 ** ** ** ** 1999 24.2 33.0 24.0 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.2 1.0 33.0 DAY 18 6 2 ** ** ** ** 17 ** ** 2 12 2000 21.0 1.0 2.0 1.0 0.0 0.0 0.0 0.0 0.0 2.2 12.4 14.0 21.0 DAY 17 14 26 25 ** ** ** ** ** 4 9 11 2001 1.0 7.0 6.0 0.0 2.0 1.0 0.0 0.1 0.0 0.0 0.6 23.0 23.0 DAY 28 11 15 ** 4 14 ** 13 ** ** 18 13 2002 17.0 9.0 9.0 19.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 3.4 19.0 DAY 12 20 21 12 ** ** ** ** ** ** 2 2 2003 11.0 20.0 12.0 14.0 0.0 0.0 0.0 0.6 0.0 0.0 0.0 35.0 35.0 DAY 17 5 26 10 ** ** ** 3 ** ** ** 6 1987-2003 24.2 43.0 25.0 20.0 41.0 2.0 3.0 3.0 2.0 17.0 14.0 35.0 43.0 YEAR-DAY 99-18 93- 4 94- 1 95-23 92-11 95- 1 87-28 94-13 94- 8 97-31 91-24 3- 6 93 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IR