STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.1 7.3 6.7 14.7 17.5 23.8 25.4 26.9 20.5 17.7 13.0 7.5 15.8 MINIMUN AIR TEMPERATURE (C) 3.0 3.1 3.7 8.6 10.8 14.1 17.9 19.0 15.6 10.9 6.3 2.7 9.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 12 0 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH FREEZING MIN.<= 0 9 6 5 2 0 0 0 0 0 0 2 6 30 TEMPERATURE RECORDS LOWEST(C) -3.0 -3.0 -1.0 -2.0 6.0 10.0 13.0 13.0 7.0 4.0 0.0 -4.0 -4.0 DAY 20 13 25 2 2 15 1 9 30 30 16 13 MAXIMUM AIR TEMPERATURE (C) 13.2 11.0 8.9 19.1 21.2 27.8 28.9 30.8 23.9 21.8 17.5 10.7 19.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 0 6 15 23 3 0 0 0 51 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 25.0 23.0 32.0 28.0 33.0 35.0 34.0 34.0 27.0 28.0 27.0 35.0 DAY 30 5 4 24 14 25 18 25 14 9 4 5 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 7.9 5.2 10.5 10.4 13.7 11.0 11.8 8.3 10.9 11.2 8.0 10.0 MEAN DAILY TEMP. (MDT) (C) 8.1 7.1 6.3 13.8 16.0 20.9 23.4 24.9 19.7 16.4 11.9 6.7 14.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.5 0.0 16.5 75.0 121.5 23.5 0.5 1.5 0.0 240.0 HEATING DEG. DAYS(BASE 18 0C) 306.0 319.0 363.0 136.5 68.0 0.0 0.0 0.0 22.0 60.5 189.5 350.0 1814.5 DEWPOINT (MEAN C) 4.9 4.4 4.7 10.1 14.1 16.9 19.4 20.9 17.7 14.4 8.9 5.1 11.8 MIXING RATIO (G/KG) 5.46 5.23 5.33 7.86 10.10 12.31 14.31 15.69 12.93 10.37 7.25 5.50 9.36 VAPOUR PRESSURE (HPA) 8.87 8.49 8.65 12.64 16.20 19.62 22.68 24.84 20.64 16.68 11.73 8.96 15.00 SATURATION DEF. (HPA) 3.26 2.22 1.50 5.07 4.34 10.64 10.54 11.40 4.48 4.22 4.09 1.95 5.31 RELATIVE HUMIDITY (MEAN %) 80 86 89 78 82 68 72 72 86 83 80 87 80 RELATIVE HUMIDITY (MAX. %) 92 95 96 94 97 93 93 96 99 99 97 98 96 RELATIVE HUMIDITY (MIN. %) 67 73 81 64 71 51 59 58 73 68 63 76 67 RELATIVE HUMIDITY (MEAN% 03UTC) 91 94 96 92 97 90 93 96 99 99 94 96 95 RELATIVE HUMIDITY (MEAN% 09UTC) 71 80 85 69 74 57 64 60 80 71 67 80 72 RELATIVE HUMIDITY (MEAN% 15UTC) 84 87 90 79 80 64 67 71 86 88 89 91 81 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 125.8 109.9 229.4 85.5 69.9 7.1 20.7 25.3 352.5 72.5 46.7 142.3 1287.6 DAYS WITH PRECIPITATION >=10 5 3 8 3 3 0 1 0 11 1 1 6 42 DAYS WITH PRECIPITATION >= 5 5 9 10 7 5 0 1 3 13 5 4 11 73 DAYS WITH PRECIPITATION >= 1 7 15 21 11 9 2 5 5 18 7 4 13 117 DAYS WITH PRECIPITATION 10 20 24 19 13 3 7 8 22 9 7 18 160 GREATEST DAILY PRECIPITATION 52.0 27.0 33.0 21.0 24.0 4.0 13.0 9.0 129.0 35.0 26.0 25.0 129.0 DAY 14 25 24 17 26 12 28 12 4 19 22 6 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 3 0 0 0 3 DAYS WITH SNOW OR SLEET 0 2 5 0 0 0 0 0 0 0 0 1 8 DAYS WITH DUST 0 0 0 2 1 1 0 0 0 0 1 0 5 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 360 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.6 6.9 8.7 5.5 5.0 3.9 4.9 5.3 8.0 6.9 6.9 8.9 6.9 PREVAILING WIND PERCENT 27.1 49.7 35.5 30.7 24.5 17.3 18.7 23.9 35.3 21.3 26.7 40.6 28.7 CALMS PERCENT OF WIND 2.6 0.0 0.0 0.0 0.0 0.0 0.6 2.6 0.7 0.0 0.0 0.0 0.5 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 242 255 277 298 329 20 325 320 284 271 255 249 274 VECTOR WIND MAGNITUDE(KNOTS) 2.9 4.3 3.6 1.3 1.5 1.2 1.1 1.7 3.3 1.9 2.2 4.8 2.1 WIND STEADINESES (MEAN %) 48.3 67.2 58.1 25.5 31.9 27.3 25.6 38.6 53.2 40.4 41.5 68.6 38.9 WIND SPEED (MEAN KNOTS) 6.0 6.4 6.2 5.1 4.7 4.4 4.3 4.4 6.2 4.7 5.3 7.0 5.4 FASTEST WIND DIRECTION 270 200 290 180 270 310 330 330 280 270 330 180 180 FASTEST WIND SPEED (KNOTS) 26 25 28 25 15 13 13 15 23 20 20 30 30 DAY 13 3 13 11 10 26 15 8 26 18 8 5 DAYS WITH SKY CLEAR (0-2)/8 9 1 2 2 7 13 13 14 8 11 8 4 92 DAYS WITH P.CLOUDY (3-6)/8 5 7 2 12 8 13 8 10 4 9 8 8 94 DAYS WITH CLOUDY (7-8)/8 17 21 27 16 16 4 10 7 18 11 14 19 180 DAYS WITH VISIBILITY =< 2 KM 7 7 13 9 11 1 0 1 10 15 6 1 81 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.7 1018.6 1018.3 1013.8 1013.8 1011.7 1009.1 1010.4 1015.2 1018.6 1019.0 1023.5 1015.9 MAX. QFE PRESSURE IN HPA 1029.8 1029.7 1028.3 1026.6 1020.3 1021.3 1017.1 1019.6 1030.1 1027.4 1039.4 1036.0 1039.4 DAY-HOUR 22- 3 18- 6 13-12 1- 6 15- 6 11- 6 29- 6 8- 9 26- 6 19- 6 12- 6 19- 6 MIN. QFE PRESSURE IN HPA 998.3 1003.3 1004.8 1001.3 1004.4 998.3 998.3 999.8 1001.7 1009.8 999.1 1000.5 998.3 DAY-HOUR 30-12 7-15 4-12 25-12 2-15 25-15 19-12 3-15 14-12 31-12 8- 9 5- 3 MEAN QNH PRESSURE IN HPA 1017.5 1017.5 1017.2 1012.7 1012.6 1010.6 1007.9 1009.3 1014.0 1017.5 1017.9 1022.4 1014.8 MAX. QNH PRESSURE IN HPA 1028.7 1028.6 1027.2 1025.5 1019.2 1020.2 1016.0 1018.5 1029.0 1026.3 1038.3 1034.9 1038.3 DAY-HOUR 22- 3 18- 6 13-12 1- 6 15- 6 11- 6 29- 6 8- 9 26- 6 19- 6 12- 6 19- 6 MIN. QNH PRESSURE IN HPA 997.2 1002.2 1003.7 1000.2 1003.3 997.2 997.2 998.7 1000.6 1008.7 998.0 999.4 997.2 DAY-HOUR 30-12 7-15 4-12 25-12 2-15 25-15 19-12 3-15 14-12 31-12 8- 9 5- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1018.8 1018.7 1018.3 1014.0 1014.3 1012.4 1009.9 1011.1 1015.4 1018.9 1019.4 1023.8 1016.2 MAX. QFE PRESSURE IN HPA 1029.8 1028.7 1027.5 1025.4 1019.7 1020.8 1016.8 1018.7 1027.9 1026.4 1037.7 1035.5 1037.7 DAY 22 18 14 1 15 11 29 8 26 19 12 19 MIN. QFE PRESSURE IN HPA 1001.8 1007.4 1006.7 1002.5 1006.9 1001.4 999.9 1001.2 1002.9 1011.1 1000.5 1000.5 999.9 DAY 30 10 4 26 4 26 19 4 13 15 8 5 MEAN QNH PRESSURE IN HPA 1017.7 1017.6 1017.2 1012.9 1013.2 1011.3 1008.7 1009.9 1014.3 1017.8 1018.3 1022.6 1015.1 MAX. QNH PRESSURE IN HPA 1028.7 1027.6 1026.4 1024.3 1018.6 1019.7 1015.7 1017.6 1026.8 1025.3 1036.6 1034.4 1036.6 DAY 22 18 14 1 15 11 29 8 26 19 12 19 MIN. QNH PRESSURE IN HPA 1000.7 1006.3 1005.6 1001.4 1005.8 1000.3 998.8 1000.1 1001.8 1010.0 999.4 999.4 998.8 DAY 30 10 4 26 4 26 19 4 13 15 8 5 MEAN QFF PRESSURE IN HPA 1017.9 1017.9 1017.4 1013.2 1013.5 1011.6 1009.1 1010.3 1014.6 1018.1 1018.6 1022.9 1015.4 MAX. QFF PRESSURE IN HPA 1028.9 1027.8 1026.6 1024.5 1018.9 1020.0 1016.0 1017.9 1027.1 1025.6 1036.8 1034.6 1036.8 DAY 22 18 14 1 15 11 29 8 26 19 12 19 MIN. QFF PRESSURE IN HPA 1001.0 1006.6 1005.9 1001.7 1006.1 1000.6 999.1 1000.4 1002.1 1010.3 999.7 999.7 999.1 DAY 30 10 4 26 4 26 19 4 13 15 8 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.9 1019.5 1019.1 1014.7 1014.7 1012.7 1010.1 1011.5 1016.2 1019.7 1020.3 1024.7 1016.9 MAX. QFE PRESSURE IN HPA 1028.8 1029.7 1027.4 1026.6 1020.3 1021.3 1017.1 1019.4 1030.1 1027.4 1039.4 1036.0 1039.4 DAY 22 18 19 1 15 11 29 8 26 19 12 19 MIN. QFE PRESSURE IN HPA 1001.7 1008.8 1007.0 1003.4 1007.9 1003.8 1000.3 1002.1 1003.6 1011.3 1001.0 1000.6 1000.3 DAY 30 10 4 26 4 25 19 4 13 15 7 5 MEAN QNH PRESSURE IN HPA 1018.8 1018.3 1018.0 1013.6 1013.6 1011.5 1009.0 1010.4 1015.1 1018.5 1019.2 1023.6 1015.8 MAX. QNH PRESSURE IN HPA 1027.7 1028.6 1026.3 1025.5 1019.2 1020.2 1016.0 1018.3 1029.0 1026.3 1038.3 1034.9 1038.3 DAY 22 18 19 1 15 11 29 8 26 19 12 19 MIN. QNH PRESSURE IN HPA 1000.6 1007.7 1005.9 1002.3 1006.8 1002.7 999.2 1001.0 1002.5 1010.2 999.9 999.5 999.2 DAY 30 10 4 26 4 25 19 4 13 15 7 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1018.7 1018.6 1014.1 1014.0 1012.0 1009.3 1010.7 1015.4 1018.6 1019.0 1023.3 1016.0 MAX. QFE PRESSURE IN HPA 1027.3 1029.0 1027.9 1026.1 1019.7 1020.6 1016.9 1019.6 1029.5 1026.9 1038.4 1034.8 1038.4 DAY 16 26 13 1 21 11 29 8 26 19 12 18 MIN. QFE PRESSURE IN HPA 999.4 1006.3 1005.2 1003.0 1006.6 1002.1 999.0 1001.1 1002.9 1011.1 999.1 1000.7 999.0 DAY 30 10 4 26 2 25 19 25 14 31 8 5 MEAN QNH PRESSURE IN HPA 1017.3 1017.6 1017.4 1013.0 1012.9 1010.8 1008.2 1009.6 1014.3 1017.5 1017.9 1022.2 1014.9 MAX. QNH PRESSURE IN HPA 1026.2 1027.9 1026.8 1025.0 1018.6 1019.5 1015.8 1018.5 1028.4 1025.8 1037.3 1033.7 1037.3 DAY 16 26 13 1 21 11 29 8 26 19 12 18 MIN. QNH PRESSURE IN HPA 998.3 1005.2 1004.1 1001.9 1005.5 1001.0 997.9 1000.0 1001.8 1010.0 998.0 999.6 997.9 DAY 30 10 4 26 2 25 19 25 14 31 8 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.7 1017.7 1017.7 1013.2 1013.0 1011.0 1008.1 1009.5 1014.4 1017.7 1017.9 1022.5 1015.0 MAX. QFE PRESSURE IN HPA 1027.5 1029.0 1028.3 1024.0 1019.2 1019.8 1015.8 1018.8 1028.2 1026.6 1036.7 1034.6 1036.7 DAY 16 26 13 1 21 11 29 8 26 19 12 18 MIN. QFE PRESSURE IN HPA 998.3 1004.5 1004.8 1001.3 1005.1 999.8 998.3 1000.0 1001.7 1009.8 999.1 1000.7 998.3 DAY 30 7 4 25 2 25 19 25 14 31 8 5 MEAN QNH PRESSURE IN HPA 1016.6 1016.6 1016.5 1012.0 1011.8 1009.8 1007.0 1008.4 1013.3 1016.6 1016.7 1021.3 1013.9 MAX. QNH PRESSURE IN HPA 1026.4 1027.9 1027.2 1022.9 1018.1 1018.7 1014.7 1017.7 1027.1 1025.5 1035.6 1033.5 1035.6 DAY 16 26 13 1 21 11 29 8 26 19 12 18 MIN. QNH PRESSURE IN HPA 997.2 1003.4 1003.7 1000.2 1004.0 998.7 997.2 998.9 1000.6 1008.7 998.0 999.6 997.2 DAY 30 7 4 25 2 25 19 25 14 31 8 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1018.6 1018.4 1018.1 1013.3 1012.9 1010.8 1008.0 1009.3 1014.5 1018.1 1018.5 1023.4 1015.3 MAX. QFE PRESSURE IN HPA 1028.5 1029.4 1027.5 1023.7 1019.1 1019.6 1015.4 1018.0 1027.5 1026.6 1036.5 1034.9 1036.5 DAY 16 26 13 15 21 11 29 8 26 19 12 18 MIN. QFE PRESSURE IN HPA 999.6 1003.3 1006.2 1001.4 1004.4 998.3 1000.0 999.8 1002.2 1009.9 1000.5 1003.1 998.3 DAY 30 7 4 25 2 25 18 3 14 10 7 9 MEAN QNH PRESSURE IN HPA 1017.4 1017.3 1017.0 1012.1 1011.8 1009.7 1006.9 1008.1 1013.4 1017.0 1017.4 1022.2 1014.2 MAX. QNH PRESSURE IN HPA 1027.4 1028.3 1026.4 1022.6 1018.0 1018.5 1014.3 1016.9 1026.4 1025.5 1035.4 1033.8 1035.4 DAY 16 26 13 15 21 11 29 8 26 19 12 18 MIN. QNH PRESSURE IN HPA 998.5 1002.2 1005.1 1000.3 1003.3 997.2 998.9 998.7 1001.1 1008.8 999.4 1002.0 997.2 DAY 30 7 4 25 2 25 18 3 14 10 7 9 MEAN QFF PRESSURE IN HPA 1017.7 1017.6 1017.3 1012.4 1012.1 1010.0 1007.2 1008.5 1013.7 1017.3 1017.7 1022.5 1014.5 MAX. QFF PRESSURE IN HPA 1027.6 1028.5 1026.6 1022.9 1018.3 1018.8 1014.6 1017.2 1026.7 1025.8 1035.6 1034.0 1035.6 DAY 16 26 13 15 21 11 29 8 26 19 12 18 MIN. QFF PRESSURE IN HPA 998.8 1002.5 1005.4 1000.6 1003.6 997.5 999.2 999.0 1001.4 1009.1 999.7 1002.3 997.5 DAY 30 7 4 25 2 25 19 3 14 10 7 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.7 7.0 9.0 14.7 21.4 22.9 26.0 26.3 25.8 18.1 11.9 9.7 16.5 MINIMUN AIR TEMPERATURE (C) 0.5 2.4 5.0 8.2 14.0 16.1 17.8 18.1 16.5 11.8 6.1 2.4 9.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 2 4 7 1 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 1 3 1 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 17 5 3 0 0 0 0 0 0 0 5 8 38 TEMPERATURE RECORDS LOWEST(C) -4.0 -5.0 -4.0 1.0 9.0 9.0 12.0 13.0 14.0 6.0 -2.0 -2.0 -5.0 DAY 23 7 30 1 15 8 5 17 3 14 22 24 MAXIMUM AIR TEMPERATURE (C) 7.8 10.2 14.1 19.0 25.6 26.7 29.9 30.7 30.6 23.7 16.7 16.3 20.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 0 3 9 16 22 22 3 0 0 76 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 17.0 30.0 27.0 32.0 33.0 33.0 36.0 32.0 31.0 23.0 25.0 36.0 DAY 15 24 4 19 9 16 25 2 5 5 2 16 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 7.8 9.1 10.8 11.6 10.6 12.1 12.6 14.1 11.9 10.6 13.9 11.0 MEAN DAILY TEMP. (MDT) (C) 4.2 6.3 9.5 13.6 19.8 21.4 23.8 24.4 23.5 17.7 11.4 9.3 15.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 13.0 44.5 88.0 103.5 76.5 8.0 0.0 0.0 333.5 HEATING DEG. DAYS(BASE 18 0C) 428.5 327.0 262.5 132.5 9.0 12.0 0.0 0.0 0.0 43.0 197.5 268.5 1680.5 DEWPOINT (MEAN C) 2.6 5.0 6.6 9.9 15.9 18.1 20.4 21.1 20.4 15.6 10.0 6.5 12.7 MIXING RATIO (G/KG) 4.83 5.46 6.11 7.71 11.47 13.22 15.29 15.98 15.13 11.26 7.90 6.12 10.04 VAPOUR PRESSURE (HPA) 7.84 8.87 9.89 12.44 18.32 21.07 24.22 25.31 24.07 18.12 12.79 9.93 16.07 SATURATION DEF. (HPA) 1.18 1.39 2.25 5.33 7.98 8.09 10.33 10.13 10.15 3.61 1.76 2.81 5.42 RELATIVE HUMIDITY (MEAN %) 88 88 87 75 73 77 73 75 74 87 90 84 81 RELATIVE HUMIDITY (MAX. %) 98 98 99 98 95 97 97 97 98 100 100 99 98 RELATIVE HUMIDITY (MIN. %) 77 78 75 59 58 63 61 63 58 73 79 65 67 RELATIVE HUMIDITY (MEAN% 03UTC) 95 96 98 97 92 97 97 97 98 99 99 99 97 RELATIVE HUMIDITY (MEAN% 09UTC) 83 83 81 64 65 69 64 66 60 78 82 70 72 RELATIVE HUMIDITY (MEAN% 15UTC) 90 88 86 71 74 72 66 72 73 90 95 88 80 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 91.2 74.3 201.6 25.1 55.3 105.7 40.7 108.4 53.2 472.0 437.9 69.2 1734.6 DAYS WITH PRECIPITATION >=10 3 2 8 0 2 4 1 3 1 12 9 2 47 DAYS WITH PRECIPITATION >= 5 8 3 11 1 5 7 2 5 2 13 12 3 72 DAYS WITH PRECIPITATION >= 1 14 6 16 7 9 11 3 7 3 16 14 5 111 DAYS WITH PRECIPITATION 17 11 19 9 14 11 5 7 7 16 17 11 144 GREATEST DAILY PRECIPITATION 14.0 34.3 34.0 8.0 14.0 27.0 30.0 60.0 42.0 99.0 112.0 35.0 112.0 DAY 6 5 26 1 25 4 4 8 21 12 4 21 DAY WITH THUNDER STORM 0 0 0 0 1 0 1 0 2 3 0 0 7 DAYS WITH SNOW OR SLEET 9 2 3 0 0 0 0 0 0 0 1 0 15 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 90 270 45 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.2 5.2 6.9 5.4 4.9 3.2 4.6 3.4 2.9 6.9 5.4 3.5 5.2 PREVAILING WIND PERCENT 43.2 36.4 31.6 22.0 24.5 26.7 24.7 27.5 22.0 33.5 32.7 29.0 27.5 CALMS PERCENT OF WIND 0.0 3.6 5.8 4.7 16.1 19.3 28.0 11.4 27.3 30.3 24.7 25.8 16.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 150 149 150 155 150 155 1814 VECTOR WIND DIRECTION (MEAN) 258 264 295 310 328 330 55 359 30 284 259 267 292 VECTOR WIND MAGNITUDE(KNOTS) 3.7 2.2 2.7 1.6 1.0 0.9 1.5 0.9 1.0 2.1 2.0 0.8 1.2 WIND STEADINESES (MEAN %) 62.7 47.8 49.1 32.0 23.3 33.3 53.6 28.1 41.7 60.0 66.7 32.0 31.6 WIND SPEED (MEAN KNOTS) 5.9 4.6 5.5 5.0 4.3 2.7 2.8 3.2 2.4 3.5 3.0 2.5 3.8 FASTEST WIND DIRECTION 270 270 230 330 270 270 50 310 130 270 270 90 90 FASTEST WIND SPEED (KNOTS) 22 15 18 28 13 10 11 12 12 25 18 30 30 DAY 21 3 17 21 4 5 3 14 21 11 28 28 DAYS WITH SKY CLEAR (0-2)/8 5 4 1 7 4 9 12 18 10 5 6 7 88 DAYS WITH P.CLOUDY (3-6)/8 7 4 8 5 16 8 12 5 17 9 5 12 108 DAYS WITH CLOUDY (7-8)/8 19 20 22 18 11 13 6 8 3 17 19 12 168 DAYS WITH VISIBILITY =< 2 KM 10 11 16 5 3 2 0 2 3 6 4 5 67 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1021.0 1020.5 1018.0 1018.1 1012.2 1014.2 1010.2 1011.5 1014.0 1020.7 1021.4 1020.1 1016.8 MAX. QFE PRESSURE IN HPA 1033.5 1030.9 1033.2 1028.3 1021.2 1023.9 1023.4 1018.4 1019.6 1035.4 1036.2 1034.1 1036.2 DAY-HOUR 4- 6 3- 6 29- 9 5- 6 11- 6 5- 6 5- 6 11-12 10- 3 12-15 23-15 22- 6 MIN. QFE PRESSURE IN HPA 1004.3 1004.7 1002.1 1007.7 1003.5 1005.1 997.8 1004.3 1006.6 1006.4 1010.3 1004.0 997.8 DAY-HOUR 18-15 26-15 17- 9 9-12 8-15 28-15 2-15 7-15 28-12 22-15 28-12 19-12 MEAN QNH PRESSURE IN HPA 1019.8 1019.4 1016.9 1017.0 1011.0 1013.0 1009.0 1010.4 1012.9 1019.5 1020.3 1019.0 1015.7 MAX. QNH PRESSURE IN HPA 1032.4 1029.8 1032.1 1027.2 1020.1 1022.8 1022.3 1017.3 1018.5 1034.3 1035.1 1033.0 1035.1 DAY-HOUR 4- 6 3- 6 29- 9 5- 6 11- 6 5- 6 5- 6 11-12 10- 3 12-15 23-15 22- 6 MIN. QNH PRESSURE IN HPA 1003.2 1003.6 1001.0 1006.6 1002.4 1004.0 996.7 1003.2 1005.5 1005.3 1009.2 1002.9 996.7 DAY-HOUR 18-15 26-15 17- 9 9-12 8-15 28-15 2-15 7-15 28-12 22-15 28-12 19-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1021.4 1020.6 1017.7 1018.3 1012.3 1014.5 1010.8 1012.0 1014.8 1021.1 1021.6 1020.4 1017.1 MAX. QFE PRESSURE IN HPA 1032.4 1030.1 1030.3 1028.0 1020.1 1023.7 1023.1 1017.4 1019.6 1034.4 1033.2 1033.5 1034.4 DAY 4 3 29 5 29 5 5 11 10 12 24 22 MIN. QFE PRESSURE IN HPA 1006.1 1006.4 1003.8 1008.7 1004.8 1006.4 1002.0 1005.4 1008.4 1012.0 1014.1 1006.1 1002.0 DAY 19 27 17 9 26 29 12 7 29 22 14 19 MEAN QNH PRESSURE IN HPA 1020.3 1019.4 1016.6 1017.1 1011.2 1013.3 1009.7 1010.9 1013.7 1020.0 1020.5 1019.3 1016.0 MAX. QNH PRESSURE IN HPA 1031.3 1029.0 1029.2 1026.9 1019.0 1022.6 1022.0 1016.3 1018.5 1033.3 1032.1 1032.4 1033.3 DAY 4 3 29 5 29 5 5 11 10 12 24 22 MIN. QNH PRESSURE IN HPA 1005.0 1005.3 1002.7 1007.6 1003.7 1005.3 1000.9 1004.3 1007.3 1010.9 1013.0 1005.0 1000.9 DAY 19 27 17 9 26 29 12 7 29 22 14 19 MEAN QFF PRESSURE IN HPA 1020.5 1019.7 1016.8 1017.4 1011.5 1013.7 1010.0 1011.2 1014.0 1020.3 1020.8 1019.6 1016.3 MAX. QFF PRESSURE IN HPA 1031.5 1029.2 1029.4 1027.1 1019.3 1022.9 1022.3 1016.6 1018.8 1033.5 1032.3 1032.6 1033.5 DAY 4 3 29 5 29 5 5 11 10 12 24 22 MIN. QFF PRESSURE IN HPA 1005.2 1005.6 1003.0 1007.9 1004.0 1005.6 1001.2 1004.6 1007.6 1011.2 1013.3 1005.3 1001.2 DAY 19 27 17 9 26 29 12 7 29 22 15 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1022.2 1021.2 1019.2 1019.0 1012.9 1014.8 1011.0 1012.4 1014.9 1021.2 1022.3 1021.1 1017.7 MAX. QFE PRESSURE IN HPA 1033.5 1030.9 1032.4 1028.3 1021.2 1023.9 1023.4 1018.2 1019.4 1034.6 1035.4 1034.1 1035.4 DAY 4 3 29 5 11 5 5 11 10 12 21 22 MIN. QFE PRESSURE IN HPA 1006.2 1008.3 1003.8 1009.8 1004.8 1006.9 1002.1 1005.9 1008.4 1010.7 1013.8 1006.3 1002.1 DAY 19 26 17 9 8 28 2 7 28 22 14 19 MEAN QNH PRESSURE IN HPA 1021.1 1020.1 1018.0 1017.9 1011.7 1013.7 1009.9 1011.3 1013.8 1020.1 1021.1 1020.0 1016.6 MAX. QNH PRESSURE IN HPA 1032.4 1029.8 1031.3 1027.2 1020.1 1022.8 1022.3 1017.1 1018.3 1033.5 1034.3 1033.0 1034.3 DAY 4 3 29 5 11 5 5 11 10 12 21 22 MIN. QNH PRESSURE IN HPA 1005.1 1007.2 1002.7 1008.7 1003.7 1005.8 1001.0 1004.8 1007.3 1009.6 1012.7 1005.2 1001.0 DAY 19 26 17 9 8 28 2 7 28 22 14 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1020.9 1020.6 1018.4 1018.3 1012.4 1014.5 1010.4 1011.5 1014.0 1020.7 1021.3 1019.9 1016.9 MAX. QFE PRESSURE IN HPA 1032.2 1029.9 1033.2 1028.0 1021.1 1023.2 1022.3 1018.1 1017.8 1034.7 1035.7 1032.7 1035.7 DAY 4 3 29 22 11 5 5 11 15 12 21 21 MIN. QFE PRESSURE IN HPA 1006.1 1006.6 1002.1 1009.1 1005.0 1006.6 1000.8 1006.0 1007.4 1009.2 1011.3 1005.0 1000.8 DAY 18 26 17 9 7 28 2 7 28 22 28 19 MEAN QNH PRESSURE IN HPA 1019.8 1019.5 1017.3 1017.1 1011.3 1013.4 1009.2 1010.4 1012.8 1019.6 1020.2 1018.8 1015.8 MAX. QNH PRESSURE IN HPA 1031.1 1028.8 1032.1 1026.9 1020.0 1022.1 1021.2 1017.0 1016.7 1033.6 1034.6 1031.6 1034.6 DAY 4 3 29 22 11 5 5 11 15 12 21 21 MIN. QNH PRESSURE IN HPA 1005.0 1005.5 1001.0 1008.0 1003.9 1005.5 999.7 1004.9 1006.3 1008.1 1010.2 1003.9 999.7 DAY 18 26 17 9 7 28 2 7 28 22 28 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1019.8 1017.3 1017.5 1011.7 1013.7 1009.5 1010.9 1013.1 1020.1 1020.7 1019.3 1016.1 MAX. QFE PRESSURE IN HPA 1030.9 1029.3 1031.9 1028.1 1020.4 1021.2 1020.9 1018.4 1017.5 1035.2 1035.5 1032.8 1035.5 DAY 4 3 29 22 11 5 4 11 9 12 21 17 MIN. QFE PRESSURE IN HPA 1004.6 1005.2 1002.4 1007.7 1004.5 1005.7 999.1 1004.9 1006.6 1007.6 1010.3 1004.0 999.1 DAY 18 26 17 9 8 28 2 7 28 22 28 19 MEAN QNH PRESSURE IN HPA 1019.0 1018.6 1016.2 1016.4 1010.6 1012.5 1008.4 1009.8 1012.0 1018.9 1019.6 1018.2 1015.0 MAX. QNH PRESSURE IN HPA 1029.8 1028.2 1030.8 1027.0 1019.3 1020.1 1019.8 1017.3 1016.4 1034.1 1034.4 1031.7 1034.4 DAY 4 3 29 22 11 5 4 11 9 12 21 17 MIN. QNH PRESSURE IN HPA 1003.5 1004.1 1001.3 1006.6 1003.4 1004.6 998.0 1003.8 1005.5 1006.5 1009.2 1002.9 998.0 DAY 18 26 17 9 8 28 2 7 28 22 28 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1020.4 1017.6 1017.7 1011.6 1013.5 1009.2 1011.0 1013.3 1020.4 1021.2 1020.0 1016.3 MAX. QFE PRESSURE IN HPA 1031.1 1029.9 1031.5 1027.5 1019.5 1021.2 1022.0 1017.2 1017.7 1035.4 1036.2 1033.5 1036.2 DAY 23 3 29 22 11 19 4 11 1 12 23 21 MIN. QFE PRESSURE IN HPA 1004.3 1004.7 1003.2 1008.2 1003.5 1005.1 997.8 1004.3 1006.8 1006.4 1010.3 1006.8 997.8 DAY 18 26 17 9 8 28 2 7 28 22 28 19 MEAN QNH PRESSURE IN HPA 1019.0 1019.2 1016.4 1016.6 1010.4 1012.4 1008.1 1009.9 1012.1 1019.2 1020.1 1018.8 1015.2 MAX. QNH PRESSURE IN HPA 1030.0 1028.8 1030.4 1026.4 1018.4 1020.1 1020.9 1016.1 1016.6 1034.3 1035.1 1032.4 1035.1 DAY 23 3 29 22 11 19 4 11 1 12 23 21 MIN. QNH PRESSURE IN HPA 1003.2 1003.6 1002.1 1007.1 1002.4 1004.0 996.7 1003.2 1005.7 1005.3 1009.2 1005.7 996.7 DAY 18 26 17 9 8 28 2 7 28 22 28 19 MEAN QFF PRESSURE IN HPA 1019.3 1019.5 1016.7 1016.9 1010.8 1012.7 1008.4 1010.2 1012.5 1019.5 1020.4 1019.1 1015.5 MAX. QFF PRESSURE IN HPA 1030.2 1029.0 1030.6 1026.7 1018.7 1020.4 1021.2 1016.4 1016.9 1034.5 1035.3 1032.6 1035.3 DAY 23 3 29 22 11 19 4 11 1 12 23 21 MIN. QFF PRESSURE IN HPA 1003.4 1003.9 1002.4 1007.4 1002.7 1004.3 997.0 1003.5 1006.0 1005.6 1009.5 1006.0 997.0 DAY 18 26 17 9 8 28 2 7 28 22 28 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.8 10.6 12.2 14.1 21.6 24.5 25.4 25.7 21.9 17.2 10.5 9.9 16.9 MINIMUN AIR TEMPERATURE (C) 4.7 1.6 5.9 8.4 12.5 16.4 17.6 17.8 16.5 12.1 4.4 4.0 10.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 3 1 0 0 0 8 DAYS WITH MINIMUM TEMP. <=-4 0 2 0 0 0 0 0 0 0 0 2 0 4 DAYS WITH FREEZING MIN.<= 0 5 10 0 0 0 0 0 0 0 0 7 7 29 TEMPERATURE RECORDS LOWEST(C) -2.0 -7.0 1.0 3.0 7.0 13.0 11.0 12.0 10.0 4.0 -4.0 -2.0 -7.0 DAY 1 2 17 14 9 15 14 6 25 29 23 12 MAXIMUM AIR TEMPERATURE (C) 15.1 17.1 17.0 18.3 26.3 28.6 29.3 29.8 25.7 21.3 15.3 13.6 21.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 1 4 12 18 19 4 1 0 0 60 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.0 27.0 32.0 33.0 31.0 35.0 34.0 34.0 31.0 32.0 20.0 27.0 35.0 DAY 9 22 14 11 31 30 1 23 1 17 27 8 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 15.5 11.1 9.9 13.8 12.2 11.7 12.0 9.2 9.2 10.9 9.6 11.2 MEAN DAILY TEMP. (MDT) (C) 9.9 9.3 11.5 13.3 19.4 22.5 23.4 23.8 21.1 16.7 9.8 8.8 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 15.0 53.0 82.0 88.5 28.5 0.0 0.0 0.0 267.0 HEATING DEG. DAYS(BASE 18 0C) 251.0 242.5 203.5 142.5 18.0 0.0 0.0 0.0 2.0 54.5 245.0 285.5 1444.5 DEWPOINT (MEAN C) 6.2 4.5 8.6 10.4 15.5 19.1 19.9 20.6 19.0 14.7 7.5 6.6 12.7 MIXING RATIO (G/KG) 5.99 5.31 6.98 7.95 11.15 14.11 14.80 15.39 13.92 10.51 6.56 6.12 9.90 VAPOUR PRESSURE (HPA) 9.71 8.63 11.25 12.82 17.88 22.40 23.44 24.40 22.19 16.95 10.71 9.93 15.86 SATURATION DEF. (HPA) 2.80 5.22 3.50 3.86 8.95 9.34 9.85 9.52 4.61 3.33 2.54 2.86 5.53 RELATIVE HUMIDITY (MEAN %) 84 73 82 81 70 74 74 75 85 87 84 84 79 RELATIVE HUMIDITY (MAX. %) 96 92 99 97 96 96 97 96 99 99 98 96 97 RELATIVE HUMIDITY (MIN. %) 70 54 66 68 56 62 60 61 73 73 69 72 65 RELATIVE HUMIDITY (MEAN% 03UTC) 92 90 98 97 96 95 97 96 99 98 96 95 96 RELATIVE HUMIDITY (MEAN% 09UTC) 77 59 69 72 59 64 64 66 75 76 74 76 69 RELATIVE HUMIDITY (MEAN% 15UTC) 85 75 84 80 67 73 71 73 88 92 89 84 80 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 54.8 29.0 40.8 33.3 12.3 40.0 75.9 65.1 232.7 293.6 159.6 99.2 1136.3 DAYS WITH PRECIPITATION >=10 2 1 1 1 0 2 2 3 8 9 2 4 35 DAYS WITH PRECIPITATION >= 5 4 2 2 3 1 3 4 4 12 9 8 5 57 DAYS WITH PRECIPITATION >= 1 11 4 12 5 4 7 7 6 16 14 12 10 108 DAYS WITH PRECIPITATION 16 8 19 16 4 10 11 9 19 19 16 14 161 GREATEST DAILY PRECIPITATION 15.0 15.0 12.0 11.0 5.0 16.0 45.0 22.0 54.0 61.0 62.0 28.0 62.0 DAY 31 6 27 5 5 21 12 4 24 1 21 9 DAY WITH THUNDER STORM 1 1 0 0 3 4 0 0 0 0 0 0 9 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 1 0 2 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 270 270 270 90 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 3.3 2.7 2.7 3.0 3.0 2.7 2.9 1.9 2.4 4.4 4.3 4.0 3.2 PREVAILING WIND PERCENT 31.0 22.1 27.1 26.7 29.0 20.7 23.9 32.9 34.7 47.1 35.3 29.7 29.8 CALMS PERCENT OF WIND 21.3 19.3 14.2 22.0 11.6 15.3 16.8 24.5 22.7 12.9 24.7 21.9 18.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 221 209 313 326 327 25 308 259 272 263 241 225 258 VECTOR WIND MAGNITUDE(KNOTS) 1.9 0.6 0.6 0.7 0.8 0.6 0.6 0.5 0.9 2.3 1.8 2.0 0.8 WIND STEADINESES (MEAN %) 54.3 21.4 24.0 31.8 33.3 27.3 33.3 35.7 50.0 71.9 58.1 57.1 32.0 WIND SPEED (MEAN KNOTS) 3.5 2.8 2.5 2.2 2.4 2.2 1.8 1.4 1.8 3.2 3.1 3.5 2.5 FASTEST WIND DIRECTION 180 360 180 360 180 90 270 260 270 180 270 180 180 FASTEST WIND SPEED (KNOTS) 30 22 18 9 15 10 7 12 16 12 30 28 30 DAY 28 3 14 30 12 13 9 3 23 17 20 7 DAYS WITH SKY CLEAR (0-2)/8 2 12 1 1 8 9 9 10 4 1 6 4 67 DAYS WITH P.CLOUDY (3-6)/8 7 7 6 5 18 11 9 9 5 7 10 8 102 DAYS WITH CLOUDY (7-8)/8 22 9 24 24 5 10 13 12 21 23 14 19 196 DAYS WITH VISIBILITY =< 2 KM 5 3 6 2 1 1 0 0 2 2 2 1 25 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.8 1020.2 1015.0 1016.0 1016.8 1010.5 1009.1 1011.3 1014.3 1020.9 1026.9 1019.8 1016.6 MAX. QFE PRESSURE IN HPA 1042.2 1030.8 1030.8 1027.4 1028.2 1019.0 1019.0 1020.8 1024.2 1034.2 1039.2 1035.8 1042.2 DAY-HOUR 5-15 13- 3 27- 3 13-12 22- 9 12-15 14- 6 4- 3 24- 6 31- 6 22- 3 5- 6 MIN. QFE PRESSURE IN HPA 1000.8 1006.3 994.0 998.7 1005.1 998.3 999.8 1003.5 1000.9 1006.0 1010.1 1002.7 994.0 DAY-HOUR 30- 9 22-12 14-12 20- 3 2-15 8-15 2-15 16-15 1-15 17-12 27-12 8-12 MEAN QNH PRESSURE IN HPA 1017.7 1019.0 1013.9 1014.9 1015.6 1009.4 1007.9 1010.1 1013.2 1019.7 1025.7 1018.7 1015.5 MAX. QNH PRESSURE IN HPA 1041.1 1029.7 1029.7 1026.3 1027.1 1017.9 1017.9 1019.7 1023.1 1033.1 1038.1 1034.7 1041.1 DAY-HOUR 5-15 13- 3 27- 3 13-12 22- 9 12-15 14- 6 4- 3 24- 6 31- 6 22- 3 5- 6 MIN. QNH PRESSURE IN HPA 999.7 1005.2 992.9 997.6 1004.0 997.2 998.7 1002.4 999.8 1004.9 1009.0 1001.6 992.9 DAY-HOUR 30- 9 22-12 14-12 20- 3 2-15 8-15 2-15 16-15 1-15 17-12 27-12 8-12 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 1018.8 1021.0 1015.7 1016.4 1017.0 1011.3 1009.9 1012.1 1014.7 1021.1 1027.1 1020.3 1017.1 MAX. QFE PRESSURE IN HPA 1027.4 1030.8 1030.8 1025.6 1026.3 1018.0 1018.8 1020.8 1023.2 1033.0 1039.2 1034.8 1039.2 DAY 13 13 27 27 13 13 14 4 24 31 22 5 MIN. QFE PRESSURE IN HPA 1003.3 1008.5 1002.1 998.7 1008.5 1002.8 1001.9 1006.5 1003.6 1008.0 1011.6 1007.4 998.7 DAY 30 22 14 20 2 30 7 16 1 17 28 8 MEAN QNH PRESSURE IN HPA 1017.7 1019.9 1014.6 1015.3 1015.9 1010.2 1008.7 1010.9 1013.6 1020.0 1026.0 1019.2 1016.0 MAX. QNH PRESSURE IN HPA 1026.3 1029.7 1029.7 1024.5 1025.2 1016.9 1017.7 1019.7 1022.1 1031.9 1038.1 1033.7 1038.1 DAY 13 13 27 27 13 13 14 4 24 31 22 5 MIN. QNH PRESSURE IN HPA 1002.2 1007.4 1001.0 997.6 1007.4 1001.7 1000.8 1005.4 1002.5 1006.9 1010.5 1006.3 997.6 DAY 30 22 14 20 2 30 7 16 1 17 28 8 MEAN QFF PRESSURE IN HPA 1017.9 1020.1 1014.9 1015.6 1016.2 1010.5 1009.1 1011.3 1013.9 1020.3 1026.3 1019.5 1016.3 MAX. QFF PRESSURE IN HPA 1026.5 1029.9 1029.9 1024.8 1025.5 1017.2 1018.0 1020.0 1022.4 1032.1 1038.3 1033.9 1038.3 DAY 13 13 27 27 13 13 14 4 24 31 22 5 MIN. QFF PRESSURE IN HPA 1002.5 1007.7 1001.3 997.9 1007.7 1002.0 1001.1 1005.7 1002.8 1007.2 1010.8 1006.6 997.9 DAY 30 22 14 20 2 30 7 16 1 17 28 8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.8 1021.4 1016.3 1016.8 1017.6 1011.4 1009.9 1012.3 1015.3 1021.9 1028.0 1021.0 1017.6 MAX. QFE PRESSURE IN HPA 1030.4 1030.8 1030.5 1026.0 1027.4 1018.4 1019.0 1020.6 1024.2 1034.2 1038.8 1035.8 1038.8 DAY 14 13 27 6 13 13 14 4 24 31 22 5 MIN. QFE PRESSURE IN HPA 1003.7 1008.8 1001.3 1000.9 1008.2 1002.6 1002.6 1005.5 1003.5 1007.7 1013.6 1008.0 1000.9 DAY 30 22 14 20 2 30 10 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1018.7 1020.3 1015.1 1015.6 1016.4 1010.3 1008.8 1011.1 1014.2 1020.7 1026.9 1019.9 1016.5 MAX. QNH PRESSURE IN HPA 1029.3 1029.7 1029.4 1024.9 1026.3 1017.3 1017.9 1019.5 1023.1 1033.1 1037.7 1034.7 1037.7 DAY 14 13 27 6 13 13 14 4 24 31 22 5 MIN. QNH PRESSURE IN HPA 1002.6 1007.7 1000.2 999.8 1007.1 1001.5 1001.5 1004.4 1002.4 1006.6 1012.5 1006.9 999.8 DAY 30 22 14 20 2 30 10 16 1 17 27 8 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 1018.8 1020.3 1015.2 1015.9 1017.1 1010.4 1009.2 1011.4 1014.3 1021.0 1027.1 1019.8 1016.7 MAX. QFE PRESSURE IN HPA 1030.9 1029.8 1030.4 1025.3 1028.2 1018.2 1018.7 1019.8 1023.6 1033.3 1037.8 1034.2 1037.8 DAY 20 28 27 5 22 13 15 4 19 31 21 5 MIN. QFE PRESSURE IN HPA 1000.8 1008.6 997.9 1000.2 1006.5 1000.9 1002.5 1004.1 1002.2 1007.3 1013.0 1005.6 997.9 DAY 30 22 14 11 2 8 10 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1017.6 1019.2 1014.1 1014.8 1016.0 1009.2 1008.1 1010.3 1013.1 1019.8 1026.0 1018.6 1015.6 MAX. QNH PRESSURE IN HPA 1029.8 1028.7 1029.3 1024.2 1027.1 1017.1 1017.6 1018.7 1022.5 1032.2 1036.7 1033.1 1036.7 DAY 20 28 27 5 22 13 15 4 19 31 21 5 MIN. QNH PRESSURE IN HPA 999.7 1007.5 996.8 999.1 1005.4 999.8 1001.4 1003.0 1001.1 1006.2 1011.9 1004.5 996.8 DAY 30 22 14 11 2 8 10 16 1 17 27 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.7 1018.8 1013.9 1015.5 1016.3 1009.7 1008.2 1010.4 1013.4 1020.0 1025.8 1018.9 1015.7 MAX. QFE PRESSURE IN HPA 1026.7 1029.1 1028.8 1027.4 1025.5 1018.8 1018.2 1018.6 1022.0 1032.9 1037.3 1032.3 1037.3 DAY 14 28 27 13 22 12 13 4 19 31 21 5 MIN. QFE PRESSURE IN HPA 1001.1 1006.3 994.0 1003.2 1005.2 999.9 1000.8 1003.8 1001.0 1006.0 1010.1 1002.7 994.0 DAY 30 22 14 11 2 30 2 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1016.5 1017.7 1012.8 1014.4 1015.1 1008.6 1007.1 1009.2 1012.3 1018.9 1024.7 1017.7 1014.6 MAX. QNH PRESSURE IN HPA 1025.6 1028.0 1027.7 1026.3 1024.4 1017.7 1017.1 1017.5 1020.9 1031.8 1036.2 1031.2 1036.2 DAY 14 28 27 13 22 12 13 4 19 31 21 5 MIN. QNH PRESSURE IN HPA 1000.0 1005.2 992.9 1002.1 1004.1 998.8 999.7 1002.7 999.9 1004.9 1009.0 1001.6 992.9 DAY 30 22 14 11 2 30 2 16 1 17 27 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1019.2 1019.4 1014.2 1015.7 1015.9 1009.6 1008.1 1010.2 1013.8 1020.4 1026.4 1019.2 1016.0 MAX. QFE PRESSURE IN HPA 1042.2 1030.5 1029.0 1025.6 1024.8 1019.0 1018.3 1018.9 1021.9 1033.0 1037.6 1032.1 1042.2 DAY 5 28 27 3 12 12 13 24 19 31 21 5 MIN. QFE PRESSURE IN HPA 1000.8 1007.0 995.3 1001.3 1005.1 998.3 999.8 1003.5 1000.9 1006.6 1010.1 1003.1 995.3 DAY 30 22 14 19 2 8 2 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1018.1 1018.3 1013.0 1014.6 1014.8 1008.5 1006.9 1009.1 1012.7 1019.3 1025.3 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1041.1 1029.4 1027.9 1024.5 1023.7 1017.9 1017.2 1017.8 1020.8 1031.9 1036.5 1031.0 1041.1 DAY 5 28 27 3 12 12 13 24 19 31 21 5 MIN. QNH PRESSURE IN HPA 999.7 1005.9 994.2 1000.2 1004.0 997.2 998.7 1002.4 999.8 1005.5 1009.0 1002.0 994.2 DAY 30 22 14 19 2 8 2 16 1 17 27 8 MEAN QFF PRESSURE IN HPA 1018.4 1018.5 1013.2 1014.8 1015.1 1008.8 1007.3 1009.4 1013.0 1019.6 1025.5 1018.4 1015.2 MAX. QFF PRESSURE IN HPA 1041.3 1029.6 1028.1 1024.7 1024.0 1018.2 1017.5 1018.1 1021.1 1032.1 1036.7 1031.2 1041.3 DAY 5 28 27 3 12 12 13 24 19 31 21 5 MIN. QFF PRESSURE IN HPA 1000.0 1006.2 994.5 1000.5 1004.3 997.5 999.0 1002.7 1000.1 1005.8 1009.3 1002.3 994.5 DAY 30 22 14 19 2 8 2 16 1 17 27 8 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.7 3.3 7.5 15.7 20.7 23.1 26.7 25.2 21.3 16.0 10.4 6.6 15.3 MINIMUN AIR TEMPERATURE (C) 2.2 -1.5 2.9 8.6 13.5 15.9 17.8 18.5 15.6 11.9 5.2 1.9 9.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 6 0 0 0 0 8 DAYS WITH MINIMUM TEMP. <=-4 0 8 0 0 0 0 0 0 0 0 0 3 11 DAYS WITH FREEZING MIN.<= 0 8 22 8 0 0 0 0 0 0 0 2 11 51 TEMPERATURE RECORDS LOWEST(C) -3.0 -7.0 -2.0 3.0 6.0 11.0 14.0 14.0 11.0 6.0 0.0 -5.0 -7.0 DAY 3 19 9 2 3 1 4 28 25 9 26 15 MAXIMUM AIR TEMPERATURE (C) 11.8 7.2 10.9 20.2 24.9 26.6 30.7 28.9 24.8 18.8 13.6 10.0 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 2 5 23 15 2 1 0 0 49 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 17.0 22.0 32.0 31.0 33.0 36.0 34.0 34.0 32.0 20.0 23.0 36.0 DAY 31 24 11 14 19 15 18 3 2 25 4 6 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 8.7 8.0 11.6 11.4 10.7 12.9 10.4 9.2 6.9 8.4 8.1 9.7 MEAN DAILY TEMP. (MDT) (C) 7.0 2.9 6.9 14.4 19.2 21.2 24.3 23.7 20.2 15.4 9.4 5.9 14.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 7.5 34.0 102.0 89.0 13.0 0.5 0.0 0.0 246.0 HEATING DEG. DAYS(BASE 18 0C) 340.5 423.5 343.0 113.5 20.0 5.5 0.0 0.0 3.5 87.5 257.5 374.0 1968.5 DEWPOINT (MEAN C) 6.0 1.1 5.4 11.5 15.7 18.2 19.9 20.2 18.0 14.1 8.5 4.8 11.9 MIXING RATIO (G/KG) 5.83 4.17 5.56 8.55 11.27 13.28 14.75 15.03 13.09 10.03 7.02 5.37 9.50 VAPOUR PRESSURE (HPA) 9.46 6.79 9.05 13.77 18.02 21.15 23.34 23.78 20.86 16.18 11.42 8.77 15.21 SATURATION DEF. (HPA) 1.31 1.27 1.59 4.93 7.06 7.83 12.64 9.30 5.06 2.35 1.69 1.37 4.70 RELATIVE HUMIDITY (MEAN %) 90 88 88 78 75 76 68 76 84 90 90 90 83 RELATIVE HUMIDITY (MAX. %) 100 97 100 98 97 96 94 96 99 99 100 98 98 RELATIVE HUMIDITY (MIN. %) 78 78 77 64 61 64 54 62 70 78 78 79 70 RELATIVE HUMIDITY (MEAN% 03UTC) 100 93 99 98 95 96 93 95 96 98 99 97 97 RELATIVE HUMIDITY (MEAN% 09UTC) 85 82 79 68 64 67 59 67 76 82 83 85 75 RELATIVE HUMIDITY (MEAN% 15UTC) 87 91 88 76 76 73 66 75 86 93 91 90 83 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 110.1 229.3 129.6 23.7 37.0 65.7 4.0 70.3 189.9 228.3 240.9 131.3 1460.1 DAYS WITH PRECIPITATION >=10 5 10 3 0 2 1 0 2 4 10 8 5 50 DAYS WITH PRECIPITATION >= 5 6 13 7 3 2 2 0 6 6 14 14 5 78 DAYS WITH PRECIPITATION >= 1 7 16 17 6 8 6 1 13 13 18 18 10 133 DAYS WITH PRECIPITATION 9 22 22 10 15 12 4 16 14 25 18 14 181 GREATEST DAILY PRECIPITATION 27.0 30.0 33.0 7.0 13.0 49.0 3.0 15.0 56.0 30.0 32.0 35.0 56.0 DAY 1 8 22 3 2 2 22 20 20 6 20 13 DAY WITH THUNDER STORM 0 1 0 0 0 1 0 0 1 0 0 0 3 DAYS WITH SNOW OR SLEET 1 11 1 0 0 0 0 0 0 0 1 2 16 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 1 2 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 3.8 8.5 4.8 5.1 4.9 5.7 5.1 5.5 4.5 6.1 8.4 6.0 6.0 PREVAILING WIND PERCENT 30.3 44.3 31.6 18.0 23.9 22.0 20.0 26.5 22.0 48.4 42.7 47.1 31.3 CALMS PERCENT OF WIND 12.3 9.3 16.8 22.7 10.3 15.3 20.6 25.8 25.3 19.4 26.0 18.1 18.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 256 253 281 331 273 284 277 268 247 277 258 252 266 VECTOR WIND MAGNITUDE(KNOTS) 1.7 4.0 1.8 1.5 0.4 1.0 0.9 1.5 1.3 2.8 4.0 3.4 1.9 WIND STEADINESES (MEAN %) 54.8 61.5 47.4 38.5 9.1 23.3 23.7 37.5 38.2 62.2 72.7 72.3 44.2 WIND SPEED (MEAN KNOTS) 3.1 6.5 3.8 3.9 4.4 4.3 3.8 4.0 3.4 4.5 5.5 4.7 4.3 FASTEST WIND DIRECTION 240 180 310 340 90 270 350 270 230 270 260 180 180 FASTEST WIND SPEED (KNOTS) 13 26 18 26 15 12 9 14 12 18 24 30 30 DAY 21 24 11 14 19 2 25 10 22 18 28 6 DAYS WITH SKY CLEAR (0-2)/8 4 4 2 6 4 7 10 9 4 3 3 6 62 DAYS WITH P.CLOUDY (3-6)/8 11 6 5 6 11 10 12 6 4 4 4 5 84 DAYS WITH CLOUDY (7-8)/8 16 18 24 18 16 13 9 16 22 24 23 20 219 DAYS WITH VISIBILITY =< 2 KM 8 10 1 4 1 0 0 0 8 15 5 5 57 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1019.6 1020.2 1021.6 1016.3 1013.0 1012.6 1008.1 1008.4 1012.4 1019.9 1024.9 1025.2 1016.8 MAX. QFE PRESSURE IN HPA 1034.2 1031.7 1031.3 1027.5 1024.7 1020.7 1013.7 1018.1 1023.6 1034.8 1036.8 1049.0 1049.0 DAY-HOUR 2- 6 13-15 14- 6 3- 3 2-15 8- 6 2- 6 24- 3 28- 3 26- 6 29- 9 14- 6 MIN. QFE PRESSURE IN HPA 1006.1 1008.1 1010.4 1001.7 999.4 1002.7 1002.8 1001.1 1000.5 1003.1 1013.1 1011.9 999.4 DAY-HOUR 31-12 19-15 17-15 24-12 19-12 16-15 25-15 9-12 2-12 12- 9 5-15 5-12 MEAN QNH PRESSURE IN HPA 1018.4 1019.1 1020.5 1015.1 1011.9 1011.4 1006.9 1007.3 1011.3 1018.7 1023.7 1024.1 1015.7 MAX. QNH PRESSURE IN HPA 1033.1 1030.6 1030.2 1026.4 1023.6 1019.6 1012.6 1017.0 1022.5 1033.7 1035.7 1047.8 1047.8 DAY-HOUR 2- 6 13-15 14- 6 3- 3 2-15 8- 6 2- 6 24- 3 28- 3 26- 6 29- 9 14- 6 MIN. QNH PRESSURE IN HPA 1005.0 1007.0 1009.3 1000.6 998.3 1001.6 1001.7 1000.0 999.4 1002.0 1012.0 1010.8 998.3 DAY-HOUR 31-12 19-15 17-15 24-12 19-12 16-15 25-15 9-12 2-12 12- 9 5-15 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.4 1020.2 1021.8 1016.7 1013.6 1013.5 1008.9 1009.0 1013.0 1020.4 1024.9 1025.6 1017.2 MAX. QFE PRESSURE IN HPA 1031.5 1031.0 1029.1 1027.5 1022.1 1020.4 1013.6 1018.1 1023.6 1034.0 1035.2 1041.3 1041.3 DAY 2 14 14 3 3 21 2 24 28 26 29 14 MIN. QFE PRESSURE IN HPA 1010.9 1009.5 1011.2 1008.2 1000.5 1008.1 1005.9 1001.9 1002.8 1005.6 1014.4 1012.9 1000.5 DAY 19 24 1 5 19 16 20 9 2 12 6 6 MEAN QNH PRESSURE IN HPA 1018.3 1019.1 1020.7 1015.5 1012.5 1012.3 1007.8 1007.8 1011.9 1019.3 1023.7 1024.5 1016.1 MAX. QNH PRESSURE IN HPA 1030.4 1029.9 1028.0 1026.4 1021.0 1019.3 1012.5 1017.0 1022.5 1032.9 1034.1 1040.2 1040.2 DAY 2 14 14 3 3 21 2 24 28 26 29 14 MIN. QNH PRESSURE IN HPA 1009.8 1008.4 1010.1 1007.1 999.4 1007.0 1004.8 1000.8 1001.7 1004.5 1013.3 1011.8 999.4 DAY 19 24 1 5 19 16 20 9 2 12 6 6 MEAN QFF PRESSURE IN HPA 1018.6 1019.4 1020.9 1015.8 1012.8 1012.7 1008.1 1008.2 1012.2 1019.6 1024.0 1024.8 1016.4 MAX. QFF PRESSURE IN HPA 1030.6 1030.1 1028.2 1026.6 1021.2 1019.6 1012.8 1017.3 1022.8 1033.2 1034.3 1040.4 1040.4 DAY 2 14 14 3 3 21 2 24 28 26 29 14 MIN. QFF PRESSURE IN HPA 1010.1 1008.7 1010.3 1007.4 999.7 1007.3 1005.1 1001.1 1002.0 1004.8 1013.6 1012.1 999.7 DAY 19 24 1 5 19 16 20 9 2 12 6 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1021.0 1021.2 1022.6 1017.5 1013.9 1013.3 1009.0 1009.4 1013.7 1020.8 1025.6 1026.4 1017.9 MAX. QFE PRESSURE IN HPA 1034.2 1031.0 1031.3 1027.5 1023.0 1020.7 1013.7 1016.9 1023.0 1034.8 1036.3 1049.0 1049.0 DAY 2 14 14 3 3 8 2 25 28 26 29 14 MIN. QFE PRESSURE IN HPA 1012.8 1010.0 1014.0 1007.7 1000.9 1006.7 1004.7 1002.5 1002.8 1004.3 1016.0 1012.9 1000.9 DAY 31 24 1 24 19 1 20 9 2 12 6 6 MEAN QNH PRESSURE IN HPA 1019.9 1020.1 1021.4 1016.3 1012.8 1012.2 1007.9 1008.3 1012.6 1019.6 1024.4 1025.2 1016.7 MAX. QNH PRESSURE IN HPA 1033.1 1029.9 1030.2 1026.4 1021.9 1019.6 1012.6 1015.8 1021.9 1033.7 1035.2 1047.8 1047.8 DAY 2 14 14 3 3 8 2 25 28 26 29 14 MIN. QNH PRESSURE IN HPA 1011.7 1008.9 1012.9 1006.6 999.8 1005.6 1003.6 1001.4 1001.7 1003.2 1014.9 1011.8 999.8 DAY 31 24 1 24 19 1 20 9 2 12 6 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.8 1020.5 1021.9 1016.8 1013.0 1012.6 1008.3 1008.7 1012.7 1019.9 1025.1 1025.1 1017.0 MAX. QFE PRESSURE IN HPA 1032.8 1031.2 1030.0 1026.8 1023.5 1020.3 1013.3 1017.9 1022.0 1034.5 1036.8 1040.6 1040.6 DAY 2 13 20 3 2 7 2 24 28 26 29 14 MIN. QFE PRESSURE IN HPA 1008.1 1008.9 1013.3 1007.4 999.5 1004.5 1004.0 1001.7 1001.5 1003.1 1014.6 1012.5 999.5 DAY 31 19 1 13 19 1 25 9 2 12 5 5 MEAN QNH PRESSURE IN HPA 1018.6 1019.4 1020.8 1015.6 1011.9 1011.4 1007.1 1007.6 1011.6 1018.7 1023.9 1024.0 1015.9 MAX. QNH PRESSURE IN HPA 1031.7 1030.1 1028.9 1025.7 1022.4 1019.2 1012.2 1016.8 1020.9 1033.4 1035.7 1039.5 1039.5 DAY 2 13 20 3 2 7 2 24 28 26 29 14 MIN. QNH PRESSURE IN HPA 1007.0 1007.8 1012.2 1006.3 998.4 1003.4 1002.9 1000.6 1000.4 1002.0 1013.5 1011.4 998.4 DAY 31 19 1 13 19 1 25 9 2 12 5 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.7 1019.4 1020.7 1015.3 1012.3 1011.8 1007.3 1007.7 1011.4 1018.9 1024.3 1024.3 1016.0 MAX. QFE PRESSURE IN HPA 1030.1 1030.7 1029.3 1025.1 1023.5 1019.6 1011.8 1015.7 1021.0 1033.6 1034.6 1037.1 1037.1 DAY 2 10 14 27 2 7 2 24 20 26 29 13 MIN. QFE PRESSURE IN HPA 1006.1 1008.5 1011.2 1001.7 999.4 1003.8 1003.5 1001.1 1000.5 1005.2 1013.2 1011.9 999.4 DAY 31 19 28 24 19 16 25 9 2 12 5 5 MEAN QNH PRESSURE IN HPA 1017.6 1018.2 1019.6 1014.1 1011.2 1010.7 1006.2 1006.6 1010.2 1017.7 1023.1 1023.2 1014.9 MAX. QNH PRESSURE IN HPA 1029.0 1029.6 1028.2 1024.0 1022.4 1018.5 1010.7 1014.6 1019.9 1032.5 1033.5 1036.0 1036.0 DAY 2 10 14 27 2 7 2 24 20 26 29 13 MIN. QNH PRESSURE IN HPA 1005.0 1007.4 1010.1 1000.6 998.3 1002.7 1002.4 1000.0 999.4 1004.1 1012.1 1010.8 998.3 DAY 31 19 28 24 19 16 25 9 2 12 5 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1019.9 1021.1 1015.3 1012.2 1011.7 1007.0 1007.5 1011.4 1019.4 1024.5 1024.7 1016.2 MAX. QFE PRESSURE IN HPA 1030.3 1031.7 1029.9 1025.6 1024.7 1019.3 1011.5 1015.9 1021.3 1032.1 1034.6 1038.5 1038.5 DAY 21 13 14 27 2 7 2 24 23 26 29 13 MIN. QFE PRESSURE IN HPA 1007.8 1008.1 1010.4 1003.6 1001.4 1002.7 1002.8 1001.7 1001.3 1006.0 1013.1 1014.0 1001.3 DAY 31 19 17 24 19 16 25 5 2 13 5 6 MEAN QNH PRESSURE IN HPA 1017.9 1018.8 1020.0 1014.2 1011.1 1010.6 1005.9 1006.4 1010.3 1018.3 1023.4 1023.5 1015.0 MAX. QNH PRESSURE IN HPA 1029.2 1030.6 1028.8 1024.5 1023.6 1018.2 1010.4 1014.8 1020.2 1031.0 1033.5 1037.4 1037.4 DAY 21 13 14 27 2 7 2 24 23 26 29 13 MIN. QNH PRESSURE IN HPA 1006.7 1007.0 1009.3 1002.5 1000.3 1001.6 1001.7 1000.6 1000.2 1004.9 1012.0 1012.9 1000.2 DAY 31 19 17 24 19 16 25 5 2 13 5 6 MEAN QFF PRESSURE IN HPA 1018.2 1019.0 1020.2 1014.5 1011.4 1010.9 1006.2 1006.7 1010.6 1018.6 1023.7 1023.8 1015.3 MAX. QFF PRESSURE IN HPA 1029.4 1030.8 1029.0 1024.8 1023.9 1018.5 1010.7 1015.1 1020.5 1031.3 1033.7 1037.6 1037.6 DAY 21 13 14 27 2 7 2 24 23 26 29 13 MIN. QFF PRESSURE IN HPA 1007.0 1007.2 1009.6 1002.8 1000.6 1001.9 1002.0 1000.9 1000.5 1005.2 1012.3 1013.2 1000.5 DAY 31 19 17 24 19 16 25 9 2 13 5 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.6 8.6 6.9 13.9 20.0 24.4 25.9 25.3 23.1 19.8 14.1 10.6 16.9 MINIMUN AIR TEMPERATURE (C) 3.1 2.6 1.9 8.6 13.3 17.4 18.5 19.6 18.1 12.5 8.6 4.9 10.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 12 5 0 0 0 21 DAYS WITH MINIMUM TEMP. <=-4 0 2 1 0 0 0 0 0 0 0 0 0 3 DAYS WITH FREEZING MIN.<= 0 6 8 11 0 0 0 0 0 0 0 0 0 25 TEMPERATURE RECORDS LOWEST(C) -3.0 -4.0 -6.0 3.0 7.0 10.0 15.0 16.0 12.0 8.0 4.0 1.0 -6.0 DAY 29 11 14 16 19 9 10 1 30 12 11 21 MAXIMUM AIR TEMPERATURE (C) 14.5 13.0 10.7 18.1 24.3 27.9 29.6 28.4 26.2 24.5 18.2 15.0 20.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 1 7 13 18 14 7 0 0 0 61 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 28.0 26.0 30.0 34.0 31.0 33.0 34.0 32.0 31.0 28.0 26.0 22.0 34.0 DAY 20 19 31 25 22 15 31 1 2 1 19 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.4 10.4 8.8 9.5 11.0 10.5 11.1 8.8 8.1 12.0 9.6 10.1 10.1 MEAN DAILY TEMP. (MDT) (C) 8.8 7.8 6.3 13.3 18.8 22.6 24.0 24.0 22.2 18.5 13.4 10.0 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.0 14.0 63.0 95.0 94.0 52.0 0.5 0.0 0.0 322.5 HEATING DEG. DAYS(BASE 18 0C) 286.0 286.0 361.5 152.5 24.0 0.5 0.0 0.0 1.0 9.0 140.5 248.5 1509.5 DEWPOINT (MEAN C) 5.9 5.8 3.9 9.1 15.1 18.4 19.8 20.5 19.5 16.0 11.1 7.9 12.7 MIXING RATIO (G/KG) 5.88 5.78 5.05 7.42 10.81 13.48 14.64 15.28 14.36 11.40 8.33 6.58 9.92 VAPOUR PRESSURE (HPA) 9.53 9.39 8.22 11.96 17.33 21.42 23.20 24.19 22.91 18.35 13.49 10.72 15.89 SATURATION DEF. (HPA) 3.06 2.38 2.32 4.94 6.99 10.19 11.18 8.69 5.98 5.38 3.09 2.34 5.55 RELATIVE HUMIDITY (MEAN %) 83 85 84 76 75 72 71 76 82 80 84 84 79 RELATIVE HUMIDITY (MAX. %) 98 98 98 93 93 95 90 93 96 97 96 98 95 RELATIVE HUMIDITY (MIN. %) 63 71 72 61 62 59 59 63 70 64 72 69 65 RELATIVE HUMIDITY (MEAN% 03UTC) 97 96 97 92 92 95 90 92 95 96 94 98 95 RELATIVE HUMIDITY (MEAN% 09UTC) 71 79 79 68 67 63 62 67 73 68 75 75 71 RELATIVE HUMIDITY (MEAN% 15UTC) 80 86 82 79 72 70 69 76 82 85 89 86 80 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 21.5 49.0 213.9 86.9 56.5 68.0 63.0 64.8 168.6 85.0 153.2 118.0 1148.4 DAYS WITH PRECIPITATION >=10 0 2 8 4 2 2 2 4 6 3 6 4 43 DAYS WITH PRECIPITATION >= 5 1 3 10 6 3 4 4 4 6 3 8 4 56 DAYS WITH PRECIPITATION >= 1 6 7 15 14 5 9 6 8 10 7 11 7 105 DAYS WITH PRECIPITATION 10 8 19 20 10 9 7 12 12 7 12 8 134 GREATEST DAILY PRECIPITATION 8.0 17.0 51.0 18.0 32.0 25.0 26.0 17.0 34.0 34.0 43.0 42.0 51.0 DAY 27 22 12 14 18 21 7 17 19 22 7 19 DAY WITH THUNDER STORM 0 0 1 0 1 0 0 0 0 1 0 1 4 DAYS WITH SNOW OR SLEET 0 1 4 0 0 0 0 0 0 0 0 0 5 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 1 2 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 5.4 5.3 7.2 7.0 4.5 5.1 6.0 5.0 4.5 4.4 5.3 5.0 5.5 PREVAILING WIND PERCENT 34.2 35.0 31.0 32.7 20.0 26.0 21.9 27.7 25.3 25.8 32.0 27.1 28.2 CALMS PERCENT OF WIND 18.1 20.7 18.1 14.7 21.9 28.7 29.0 17.4 18.0 20.6 21.3 25.2 21.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 247 275 280 287 335 287 280 285 303 288 259 264 278 VECTOR WIND MAGNITUDE(KNOTS) 2.3 1.9 2.0 2.1 1.2 1.0 1.3 1.0 0.9 1.1 1.7 1.6 1.4 WIND STEADINESES (MEAN %) 45.1 47.5 39.2 38.2 31.6 27.0 38.2 24.4 25.7 35.5 50.0 51.6 35.0 WIND SPEED (MEAN KNOTS) 5.1 4.0 5.1 5.5 3.8 3.7 3.4 4.1 3.5 3.1 3.4 3.1 4.0 FASTEST WIND DIRECTION 180 180 360 260 300 40 230 360 230 270 350 260 360 FASTEST WIND SPEED (KNOTS) 26 15 35 35 15 15 12 12 12 15 19 15 35 DAY 9 1 8 1 18 22 8 2 16 21 13 1 DAYS WITH SKY CLEAR (0-2)/8 6 4 5 3 6 10 13 8 4 9 6 3 77 DAYS WITH P.CLOUDY (3-6)/8 11 6 4 5 8 10 8 5 8 14 11 13 103 DAYS WITH CLOUDY (7-8)/8 14 18 22 22 17 10 10 18 18 8 13 15 185 DAYS WITH VISIBILITY =< 2 KM 5 6 4 0 1 1 1 0 0 4 3 0 25 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1019.3 1020.3 1020.7 1017.2 1016.3 1011.0 1009.6 1009.0 1015.6 1019.5 1021.5 1024.5 1017.0 MAX. QFE PRESSURE IN HPA 1029.1 1032.5 1037.9 1045.7 1026.8 1022.7 1039.3 1017.6 1023.8 1025.8 1033.0 1031.6 1045.7 DAY-HOUR 27-15 7- 6 19- 6 20-12 5- 6 7- 6 25- 3 14- 6 20- 9 27-15 26- 6 4- 3 MIN. QFE PRESSURE IN HPA 1007.3 1007.7 1001.4 1003.0 1002.6 1000.2 999.9 999.7 1008.1 1009.7 1003.7 1010.3 999.7 DAY-HOUR 20- 9 21-12 2-12 25-15 30-15 20-15 5-15 23-15 13-12 10-12 19- 9 29-12 MEAN QNH PRESSURE IN HPA 1018.2 1019.1 1019.6 1016.1 1015.2 1009.9 1008.5 1007.9 1014.5 1018.3 1020.3 1023.3 1015.9 MAX. QNH PRESSURE IN HPA 1028.0 1031.4 1036.8 1044.5 1025.7 1021.6 1038.2 1016.5 1022.7 1024.7 1031.9 1030.5 1044.5 DAY-HOUR 27-15 7- 6 19- 6 20-12 5- 6 7- 6 25- 3 14- 6 20- 9 27-15 26- 6 4- 3 MIN. QNH PRESSURE IN HPA 1006.2 1006.6 1000.3 1001.9 1001.5 999.1 998.8 998.6 1007.0 1008.6 1002.6 1009.2 998.6 DAY-HOUR 20- 9 21-12 2-12 25-15 30-15 20-15 5-15 23-15 13-12 10-12 19- 9 29-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1020.6 1021.1 1017.0 1017.2 1012.1 1011.0 1009.9 1016.0 1019.8 1022.0 1024.5 1017.6 MAX. QFE PRESSURE IN HPA 1028.5 1031.5 1036.8 1039.9 1026.4 1022.1 1039.3 1017.4 1022.0 1025.8 1032.4 1031.6 1039.9 DAY 28 7 19 7 5 7 25 14 19 31 26 4 MIN. QFE PRESSURE IN HPA 1010.1 1009.5 1006.0 1004.2 1005.5 1004.9 1002.6 1004.0 1009.6 1013.0 1004.4 1013.9 1002.6 DAY 23 21 2 1 30 20 5 23 4 21 19 29 MEAN QNH PRESSURE IN HPA 1018.6 1019.5 1020.0 1015.9 1016.0 1011.0 1009.9 1008.8 1014.9 1018.7 1020.9 1023.3 1016.4 MAX. QNH PRESSURE IN HPA 1027.4 1030.4 1035.7 1038.8 1025.3 1021.0 1038.2 1016.3 1020.9 1024.7 1031.3 1030.5 1038.8 DAY 28 7 19 7 5 7 25 14 19 31 26 4 MIN. QNH PRESSURE IN HPA 1009.0 1008.4 1004.9 1003.1 1004.4 1003.8 1001.5 1002.9 1008.5 1011.9 1003.3 1012.8 1001.5 DAY 23 21 2 1 30 20 5 23 4 21 19 29 MEAN QFF PRESSURE IN HPA 1018.8 1020.0 1020.2 1016.2 1016.3 1011.3 1010.2 1009.1 1015.2 1019.0 1021.2 1023.6 1016.8 MAX. QFF PRESSURE IN HPA 1027.6 1030.6 1035.9 1039.0 1025.6 1021.3 1038.5 1016.6 1021.2 1025.0 1031.5 1030.7 1039.0 DAY 28 7 19 7 5 7 25 14 19 31 26 4 MIN. QFF PRESSURE IN HPA 1009.3 1008.7 1005.2 1003.4 1004.7 1004.1 1001.8 1003.2 1008.8 1012.2 1003.6 1013.1 1001.8 DAY 23 21 2 1 30 20 5 23 4 21 19 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1020.5 1021.3 1021.7 1017.8 1017.3 1012.2 1010.2 1010.1 1016.8 1020.5 1022.6 1025.7 1018.0 MAX. QFE PRESSURE IN HPA 1029.0 1032.5 1037.9 1041.6 1026.8 1022.7 1014.5 1017.6 1023.6 1025.6 1033.0 1031.6 1041.6 DAY 28 7 19 7 5 7 9 14 20 22 26 4 MIN. QFE PRESSURE IN HPA 1010.0 1010.9 1004.4 1004.3 1006.5 1004.0 1002.3 1003.1 1009.5 1013.5 1004.2 1014.0 1002.3 DAY 16 19 2 1 30 30 5 24 4 10 19 29 MEAN QNH PRESSURE IN HPA 1019.3 1020.2 1020.5 1016.6 1016.1 1011.1 1009.0 1008.9 1015.6 1019.4 1021.4 1024.5 1016.9 MAX. QNH PRESSURE IN HPA 1027.9 1031.4 1036.8 1040.5 1025.7 1021.6 1013.4 1016.5 1022.5 1024.5 1031.9 1030.5 1040.5 DAY 28 7 19 7 5 7 9 14 20 22 26 4 MIN. QNH PRESSURE IN HPA 1008.9 1009.8 1003.3 1003.2 1005.4 1002.9 1001.2 1002.0 1008.4 1012.4 1003.1 1012.9 1001.2 DAY 16 19 2 1 30 30 5 24 4 10 19 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1019.3 1020.8 1021.2 1017.2 1016.3 1010.9 1009.5 1009.2 1016.0 1019.7 1021.5 1024.3 1017.2 MAX. QFE PRESSURE IN HPA 1028.6 1032.4 1037.8 1041.4 1026.5 1022.7 1014.1 1016.1 1023.8 1025.6 1031.8 1029.0 1041.4 DAY 27 7 19 7 5 7 9 14 20 22 26 8 MIN. QFE PRESSURE IN HPA 1007.3 1009.3 1002.7 1003.5 1004.9 1002.7 1001.5 1001.4 1009.0 1011.9 1003.7 1011.1 1001.4 DAY 20 29 2 1 30 20 5 23 4 10 19 29 MEAN QNH PRESSURE IN HPA 1018.2 1019.6 1020.1 1016.0 1015.2 1009.8 1008.3 1008.1 1014.8 1018.6 1020.4 1023.2 1016.0 MAX. QNH PRESSURE IN HPA 1027.5 1031.3 1036.7 1040.3 1025.4 1021.6 1013.0 1015.0 1022.7 1024.5 1030.7 1027.9 1040.3 DAY 27 7 19 7 5 7 9 14 20 22 26 8 MIN. QNH PRESSURE IN HPA 1006.2 1008.2 1001.6 1002.4 1003.8 1001.6 1000.4 1000.3 1007.9 1010.8 1002.6 1010.0 1000.3 DAY 20 29 2 1 30 20 5 23 4 10 19 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.3 1019.4 1019.8 1017.5 1015.5 1010.0 1009.2 1008.0 1014.6 1018.6 1020.5 1023.6 1016.3 MAX. QFE PRESSURE IN HPA 1028.7 1032.1 1036.6 1045.7 1024.9 1022.0 1033.1 1015.2 1023.3 1024.7 1031.4 1028.5 1045.7 DAY 27 10 19 20 5 7 21 14 20 22 25 16 MIN. QFE PRESSURE IN HPA 1008.0 1007.7 1001.4 1003.9 1003.0 1001.1 1000.1 1000.3 1008.1 1009.7 1005.6 1010.3 1000.1 DAY 20 21 2 25 30 20 5 23 13 10 19 29 MEAN QNH PRESSURE IN HPA 1017.2 1018.3 1018.6 1016.4 1014.4 1008.9 1008.0 1006.8 1013.5 1017.4 1019.4 1022.5 1015.1 MAX. QNH PRESSURE IN HPA 1027.6 1031.0 1035.5 1044.5 1023.8 1020.9 1032.0 1014.1 1022.2 1023.6 1030.3 1027.4 1044.5 DAY 27 10 19 20 5 7 21 14 20 22 25 16 MIN. QNH PRESSURE IN HPA 1006.9 1006.6 1000.3 1002.8 1001.9 1000.0 999.0 999.2 1007.0 1008.6 1004.5 1009.2 999.0 DAY 20 21 2 25 30 20 5 23 13 10 19 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1019.3 1020.0 1016.6 1015.4 1010.0 1008.4 1008.0 1014.9 1018.8 1020.7 1024.3 1016.3 MAX. QFE PRESSURE IN HPA 1029.1 1032.2 1036.9 1040.8 1024.5 1021.5 1014.2 1015.2 1023.3 1025.8 1032.4 1030.1 1040.8 DAY 27 10 19 7 5 7 8 13 20 27 25 16 MIN. QFE PRESSURE IN HPA 1008.1 1008.3 1003.2 1003.0 1002.6 1000.2 999.9 999.7 1008.5 1010.8 1004.9 1011.0 999.7 DAY 20 21 2 25 30 20 5 23 3 20 19 29 MEAN QNH PRESSURE IN HPA 1017.8 1018.2 1018.8 1015.5 1014.2 1008.8 1007.2 1006.9 1013.8 1017.6 1019.6 1023.2 1015.1 MAX. QNH PRESSURE IN HPA 1028.0 1031.1 1035.8 1039.7 1023.4 1020.4 1013.1 1014.1 1022.2 1024.7 1031.3 1029.0 1039.7 DAY 27 10 19 7 5 7 8 13 20 27 25 16 MIN. QNH PRESSURE IN HPA 1007.0 1007.2 1002.1 1001.9 1001.5 999.1 998.8 998.6 1007.4 1009.7 1003.8 1009.9 998.6 DAY 20 21 2 25 30 20 5 23 3 20 19 29 MEAN QFF PRESSURE IN HPA 1018.1 1018.5 1019.1 1015.7 1014.6 1009.2 1007.6 1007.2 1014.1 1017.9 1019.9 1023.5 1015.4 MAX. QFF PRESSURE IN HPA 1028.2 1031.3 1036.0 1039.9 1023.7 1020.7 1013.4 1014.4 1022.5 1025.0 1031.5 1029.2 1039.9 DAY 27 10 19 7 5 7 8 13 20 27 25 16 MIN. QFF PRESSURE IN HPA 1007.3 1007.5 1002.4 1002.2 1001.8 999.4 999.1 998.9 1007.7 1010.0 1004.1 1010.2 998.9 DAY 20 21 2 25 30 20 5 23 3 20 19 29 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.5 8.4 10.9 15.5 23.1 25.6 26.3 26.2 20.8 17.5 15.0 12.1 17.5 MINIMUN AIR TEMPERATURE (C) 2.2 2.6 4.3 7.9 15.1 16.7 19.5 18.5 17.1 13.1 8.9 5.2 10.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 6 0 0 0 0 11 DAYS WITH MINIMUM TEMP. <=-4 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 11 9 4 0 0 0 0 0 0 0 0 0 24 TEMPERATURE RECORDS LOWEST(C) 0.0 -4.0 -2.0 1.0 11.0 13.0 18.0 15.0 12.0 7.0 1.0 1.0 -4.0 DAY 7 2 4 17 18 8 7 9 20 29 27 25 MAXIMUM AIR TEMPERATURE (C) 12.6 11.7 15.2 20.3 27.6 29.8 30.0 31.0 23.8 21.2 19.9 16.9 21.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 1 7 16 22 23 2 1 0 0 73 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 23.0 30.0 30.0 34.0 35.0 34.0 36.0 31.0 37.0 27.0 23.0 37.0 DAY 26 7 24 21 23 22 20 18 10 15 16 3 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 9.1 10.9 12.4 12.5 13.1 10.5 12.5 6.7 8.1 11.0 11.7 10.8 MEAN DAILY TEMP. (MDT) (C) 7.4 7.1 9.7 14.1 21.4 23.2 24.7 24.7 20.4 17.1 14.4 11.1 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.0 27.0 73.5 115.5 116.0 17.5 5.0 0.0 0.0 355.5 HEATING DEG. DAYS(BASE 18 0C) 329.0 304.5 256.0 126.0 0.0 0.0 0.0 0.0 1.0 47.5 108.0 215.0 1387.0 DEWPOINT (MEAN C) 4.3 4.3 5.2 10.0 17.8 18.7 19.7 19.3 18.2 14.1 11.3 9.4 12.7 MIXING RATIO (G/KG) 5.34 5.28 5.57 7.82 12.96 13.83 14.51 14.31 13.12 10.06 8.51 7.41 9.89 VAPOUR PRESSURE (HPA) 8.68 8.59 9.02 12.59 20.62 21.95 23.01 22.73 20.94 16.25 13.73 11.97 15.84 SATURATION DEF. (HPA) 2.95 2.80 4.85 5.89 8.54 11.89 11.97 12.50 4.06 4.25 3.88 2.59 6.35 RELATIVE HUMIDITY (MEAN %) 79 80 72 73 74 68 69 68 86 82 80 85 76 RELATIVE HUMIDITY (MAX. %) 96 96 94 94 95 91 92 93 96 95 94 97 94 RELATIVE HUMIDITY (MIN. %) 62 63 55 56 60 56 57 55 78 69 65 72 62 RELATIVE HUMIDITY (MEAN% 03UTC) 95 91 94 92 95 91 91 92 95 95 94 96 93 RELATIVE HUMIDITY (MEAN% 09UTC) 71 74 61 64 64 60 61 58 79 74 70 78 68 RELATIVE HUMIDITY (MEAN% 15UTC) 77 77 69 70 71 64 65 65 87 83 81 86 75 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 97.0 119.0 37.6 60.1 29.0 11.0 36.0 27.0 323.6 183.4 83.0 44.0 1050.7 DAYS WITH PRECIPITATION >=10 3 4 1 3 1 1 1 1 10 7 1 2 35 DAYS WITH PRECIPITATION >= 5 6 10 2 5 3 1 2 2 12 10 1 2 56 DAYS WITH PRECIPITATION >= 1 12 10 8 6 5 2 4 5 17 14 4 6 93 DAYS WITH PRECIPITATION 12 10 12 11 6 2 7 6 19 16 5 7 113 GREATEST DAILY PRECIPITATION 24.0 28.0 14.0 23.0 17.0 10.0 25.0 11.0 96.0 48.0 77.0 25.0 96.0 DAY 3 27 10 15 17 6 15 8 2 24 14 16 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 1 2 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 360 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.4 7.9 4.6 3.3 3.7 3.2 2.6 2.7 3.1 3.5 2.6 2.6 4.3 PREVAILING WIND PERCENT 31.0 37.9 12.3 25.3 14.8 14.0 25.2 14.8 37.3 31.0 11.3 16.8 22.3 CALMS PERCENT OF WIND 20.0 17.9 34.2 24.0 39.4 44.0 27.7 43.9 44.7 47.7 57.3 68.4 39.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 232 271 131 331 315 317 295 347 265 266 258 227 269 VECTOR WIND MAGNITUDE(KNOTS) 2.2 3.0 0.1 0.8 0.3 0.4 0.7 0.3 1.1 1.2 0.3 0.6 0.8 WIND STEADINESES (MEAN %) 42.3 60.0 3.4 29.6 15.0 26.7 41.2 23.1 68.7 70.6 27.3 54.5 34.8 WIND SPEED (MEAN KNOTS) 5.2 5.0 2.9 2.7 2.0 1.5 1.7 1.3 1.6 1.7 1.1 1.1 2.3 FASTEST WIND DIRECTION 180 270 170 360 300 340 280 360 120 300 180 180 180 FASTEST WIND SPEED (KNOTS) 38 35 25 20 15 10 6 8 7 18 12 20 38 DAY 26 26 15 22 16 1 2 20 8 15 16 14 DAYS WITH SKY CLEAR (0-2)/8 8 5 9 7 15 21 17 15 4 8 10 9 128 DAYS WITH P.CLOUDY (3-6)/8 9 6 6 7 9 6 6 8 4 8 11 14 94 DAYS WITH CLOUDY (7-8)/8 14 17 16 16 7 3 8 8 22 15 9 8 143 DAYS WITH VISIBILITY =< 2 KM 4 1 2 1 3 0 0 1 0 2 1 2 17 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1022.2 1022.1 1017.9 1016.3 1011.2 1010.3 1009.3 1011.5 1014.1 1022.0 1018.5 1017.2 1016.0 MAX. QFE PRESSURE IN HPA 1032.6 1034.5 1036.1 1029.7 1022.9 1020.0 1016.4 1019.9 1021.7 1035.3 1029.0 1030.5 1036.1 DAY-HOUR 8- 6 21- 6 3- 3 16-12 1- 6 7- 3 24- 6 26- 6 24- 6 24-15 14-15 6- 6 MIN. QFE PRESSURE IN HPA 1004.7 1011.0 1002.5 1002.4 998.3 1000.3 1000.3 1000.9 1003.1 1006.3 1001.3 997.0 997.0 DAY-HOUR 26-15 8-12 24-15 13- 3 27-15 5-15 11-12 19-15 12-12 15-12 22-15 22-15 MEAN QNH PRESSURE IN HPA 1021.0 1020.9 1016.8 1015.1 1010.1 1009.1 1008.1 1010.4 1013.0 1020.9 1017.3 1016.1 1014.9 MAX. QNH PRESSURE IN HPA 1031.5 1033.4 1035.0 1028.6 1021.8 1018.9 1015.3 1018.8 1020.6 1034.2 1027.9 1029.4 1035.0 DAY-HOUR 8- 6 21- 6 3- 3 16-12 1- 6 7- 3 24- 6 26- 6 24- 6 24-15 14-15 6- 6 MIN. QNH PRESSURE IN HPA 1003.6 1009.9 1001.4 1001.3 997.2 999.2 999.2 999.8 1002.0 1005.2 1000.2 995.9 995.9 DAY-HOUR 26-15 8-12 24-15 13- 3 27-15 5-15 11-12 19-15 12-12 15-12 22-15 22-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1022.4 1022.4 1018.7 1016.7 1012.5 1011.4 1010.2 1012.2 1014.6 1022.4 1018.6 1017.7 1016.7 MAX. QFE PRESSURE IN HPA 1032.0 1034.0 1036.1 1028.7 1022.5 1020.0 1016.3 1018.6 1020.3 1034.4 1025.0 1028.3 1036.1 DAY 8 21 3 17 1 7 24 26 7 24 14 6 MIN. QFE PRESSURE IN HPA 1010.5 1013.4 1007.9 1002.4 1003.3 1003.3 1004.0 1001.5 1004.7 1010.2 1003.2 1001.3 1001.3 DAY 17 7 30 13 31 1 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1021.3 1021.3 1017.5 1015.6 1011.4 1010.3 1009.0 1011.1 1013.5 1021.3 1017.5 1016.6 1015.5 MAX. QNH PRESSURE IN HPA 1030.9 1032.9 1035.0 1027.6 1021.4 1018.9 1015.2 1017.5 1019.2 1033.3 1023.9 1027.2 1035.0 DAY 8 21 3 17 1 7 24 26 7 24 14 6 MIN. QNH PRESSURE IN HPA 1009.4 1012.3 1006.8 1001.3 1002.2 1002.2 1002.9 1000.4 1003.6 1009.1 1002.1 1000.2 1000.2 DAY 17 7 30 13 31 1 11 19 12 15 22 22 MEAN QFF PRESSURE IN HPA 1021.6 1021.5 1017.8 1015.9 1011.7 1010.6 1009.4 1011.4 1013.8 1021.6 1017.8 1016.9 1015.8 MAX. QFF PRESSURE IN HPA 1031.1 1033.1 1035.2 1027.8 1021.7 1019.2 1015.5 1017.8 1019.5 1033.6 1024.2 1027.4 1035.2 DAY 8 21 3 17 1 7 24 26 7 24 14 6 MIN. QFF PRESSURE IN HPA 1009.6 1012.6 1007.1 1001.6 1002.5 1002.5 1003.2 1000.7 1003.9 1009.4 1002.4 1000.5 1000.5 DAY 17 7 30 13 31 14 11 19 12 15 22 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1023.2 1023.1 1019.1 1017.1 1012.7 1011.2 1010.3 1012.7 1015.1 1022.9 1019.7 1018.5 1017.1 MAX. QFE PRESSURE IN HPA 1032.6 1034.5 1035.3 1028.2 1022.9 1019.3 1016.4 1019.9 1021.7 1034.8 1026.6 1030.5 1035.3 DAY 8 21 3 17 1 23 24 26 24 24 14 6 MIN. QFE PRESSURE IN HPA 1009.0 1014.6 1007.6 1004.5 1003.8 1003.0 1002.7 1003.4 1005.1 1010.2 1004.2 1001.6 1001.6 DAY 26 8 24 13 31 14 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1022.0 1021.9 1018.0 1016.0 1011.6 1010.0 1009.2 1011.6 1014.0 1021.8 1018.5 1017.3 1016.0 MAX. QNH PRESSURE IN HPA 1031.5 1033.4 1034.2 1027.1 1021.8 1018.2 1015.3 1018.8 1020.6 1033.7 1025.5 1029.4 1034.2 DAY 8 21 3 17 1 23 24 26 24 24 14 6 MIN. QNH PRESSURE IN HPA 1007.9 1013.5 1006.5 1003.4 1002.7 1001.9 1001.6 1002.3 1004.0 1009.1 1003.1 1000.5 1000.5 DAY 26 8 24 13 31 14 11 19 12 15 22 22 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 1022.3 1022.4 1018.2 1016.6 1011.3 1010.3 1009.6 1011.8 1014.3 1022.1 1018.7 1017.4 1016.2 MAX. QFE PRESSURE IN HPA 1031.8 1033.8 1035.7 1029.5 1020.3 1017.9 1015.6 1018.5 1021.6 1034.6 1027.6 1029.6 1035.7 DAY 8 27 3 16 14 23 24 26 24 24 14 6 MIN. QFE PRESSURE IN HPA 1008.0 1013.4 1006.5 1004.0 1001.4 1002.4 1001.1 1002.2 1003.5 1007.9 1003.9 999.9 999.9 DAY 26 7 24 29 31 14 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1021.1 1021.2 1017.1 1015.4 1010.2 1009.2 1008.4 1010.7 1013.2 1021.0 1017.6 1016.2 1015.1 MAX. QNH PRESSURE IN HPA 1030.7 1032.7 1034.6 1028.4 1019.2 1016.8 1014.5 1017.4 1020.5 1033.5 1026.5 1028.5 1034.6 DAY 8 27 3 16 14 23 24 26 24 24 14 6 MIN. QNH PRESSURE IN HPA 1006.9 1012.3 1005.4 1002.9 1000.3 1001.3 1000.0 1001.1 1002.4 1006.8 1002.8 998.8 998.8 DAY 26 7 24 29 31 14 11 19 12 15 22 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1021.3 1021.2 1016.7 1015.4 1009.9 1009.4 1008.4 1010.5 1013.3 1021.2 1017.5 1016.0 1015.1 MAX. QFE PRESSURE IN HPA 1030.1 1032.8 1035.1 1029.7 1020.3 1016.9 1014.4 1017.8 1020.6 1034.4 1027.6 1027.8 1035.1 DAY 8 21 3 16 17 23 12 20 24 24 14 6 MIN. QFE PRESSURE IN HPA 1005.5 1011.0 1005.4 1002.8 998.8 1000.4 1000.3 1001.0 1003.1 1006.3 1001.6 997.5 997.5 DAY 26 8 14 29 31 5 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1020.1 1020.1 1015.6 1014.3 1008.8 1008.3 1007.3 1009.4 1012.1 1020.0 1016.4 1014.9 1013.9 MAX. QNH PRESSURE IN HPA 1029.0 1031.7 1034.0 1028.6 1019.2 1015.8 1013.3 1016.7 1019.5 1033.3 1026.5 1026.7 1034.0 DAY 8 21 3 16 17 23 12 20 24 24 14 6 MIN. QNH PRESSURE IN HPA 1004.4 1009.9 1004.3 1001.7 997.7 999.3 999.2 999.9 1002.0 1005.2 1000.5 996.4 996.4 DAY 26 8 14 29 31 5 11 19 12 15 22 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1021.8 1021.3 1016.8 1015.6 1009.6 1009.1 1008.0 1010.2 1013.4 1021.7 1017.8 1016.5 1015.2 MAX. QFE PRESSURE IN HPA 1031.1 1033.0 1035.5 1029.7 1020.1 1017.2 1014.3 1017.9 1020.6 1035.3 1029.0 1028.3 1035.5 DAY 29 21 3 16 17 6 12 20 24 24 14 6 MIN. QFE PRESSURE IN HPA 1004.7 1012.0 1002.5 1002.8 998.3 1000.3 1000.8 1000.9 1004.3 1012.1 1001.3 997.0 997.0 DAY 26 8 24 29 27 5 11 19 12 14 22 22 MEAN QNH PRESSURE IN HPA 1020.6 1020.2 1015.7 1014.4 1008.5 1008.0 1006.9 1009.1 1012.3 1020.6 1016.7 1015.3 1014.0 MAX. QNH PRESSURE IN HPA 1030.0 1031.9 1034.4 1028.6 1019.0 1016.1 1013.2 1016.8 1019.5 1034.2 1027.9 1027.2 1034.4 DAY 29 21 3 16 17 6 12 20 24 24 14 6 MIN. QNH PRESSURE IN HPA 1003.6 1010.9 1001.4 1001.7 997.2 999.2 999.7 999.8 1003.2 1011.0 1000.2 995.9 995.9 DAY 26 8 24 29 27 5 11 19 12 14 22 22 MEAN QFF PRESSURE IN HPA 1020.9 1020.5 1016.0 1014.7 1008.8 1008.3 1007.2 1009.4 1012.6 1020.9 1017.0 1015.6 1014.3 MAX. QFF PRESSURE IN HPA 1030.2 1032.1 1034.6 1028.8 1019.3 1016.4 1013.5 1017.1 1019.8 1034.4 1028.2 1027.4 1034.6 DAY 29 21 3 16 17 6 12 20 24 24 14 6 MIN. QFF PRESSURE IN HPA 1003.9 1011.2 1001.7 1002.0 997.5 999.5 1000.0 1000.1 1003.5 1011.3 1000.5 996.2 996.2 DAY 26 8 24 29 27 5 11 19 12 14 22 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.2 9.9 12.3 14.6 20.8 23.6 28.2 26.3 22.8 18.1 13.7 11.1 17.5 MINIMUN AIR TEMPERATURE (C) 3.1 4.6 7.1 9.2 14.1 16.3 20.3 19.6 17.1 12.9 9.9 6.0 11.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 14 14 6 0 0 0 34 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 3 2 2 0 0 0 0 0 0 0 1 3 11 TEMPERATURE RECORDS LOWEST(C) -2.0 0.0 0.0 2.0 10.0 8.0 16.0 14.0 12.0 4.0 0.0 0.0 -2.0 DAY 6 14 13 13 12 11 8 11 19 12 30 1 MAXIMUM AIR TEMPERATURE (C) 11.9 14.0 16.6 18.0 25.1 27.6 31.7 30.1 26.8 21.9 17.0 15.4 21.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 11 29 22 5 0 0 0 70 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 21.0 27.0 23.0 26.0 31.0 37.0 35.0 34.0 31.0 29.0 21.0 26.0 37.0 DAY 29 16 3 7 17 7 21 18 1 7 2 20 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 9.4 9.5 8.8 11.0 11.3 11.4 10.5 9.7 9.0 7.1 9.4 9.6 MEAN DAILY TEMP. (MDT) (C) 7.5 9.3 11.9 13.6 19.6 21.9 26.0 24.9 22.0 17.4 13.5 10.7 16.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.5 50.0 155.0 121.5 44.5 2.5 0.0 0.5 382.5 HEATING DEG. DAYS(BASE 18 0C) 325.0 243.5 190.5 133.0 2.0 5.0 0.0 0.0 1.0 51.5 136.0 231.0 1318.5 DEWPOINT (MEAN C) 5.7 6.7 8.5 9.5 15.7 17.8 22.1 21.4 18.9 15.1 10.7 7.4 13.3 MIXING RATIO (G/KG) 5.69 6.12 6.93 7.51 11.22 12.96 17.02 16.16 13.81 10.82 8.06 6.55 10.24 VAPOUR PRESSURE (HPA) 9.26 9.90 11.19 12.12 17.97 20.66 26.87 25.64 22.06 17.42 13.11 10.60 16.40 SATURATION DEF. (HPA) 1.96 2.68 3.44 4.90 7.29 9.40 12.09 9.43 6.34 4.02 2.94 3.39 5.66 RELATIVE HUMIDITY (MEAN %) 86 82 79 75 75 72 71 76 80 84 83 82 79 RELATIVE HUMIDITY (MAX. %) 95 96 93 93 93 91 88 94 96 96 96 94 94 RELATIVE HUMIDITY (MIN. %) 76 69 65 62 61 60 59 65 68 72 70 68 66 RELATIVE HUMIDITY (MEAN% 03UTC) 93 95 90 92 92 90 88 94 95 96 95 89 92 RELATIVE HUMIDITY (MEAN% 09UTC) 83 77 74 66 67 64 63 68 72 76 74 75 72 RELATIVE HUMIDITY (MEAN% 15UTC) 82 77 78 73 72 70 69 75 82 86 85 84 78 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 139.6 37.1 40.1 68.6 27.0 99.2 14.0 112.1 178.6 251.3 137.4 199.2 1304.2 DAYS WITH PRECIPITATION >=10 7 0 1 3 0 3 0 5 3 7 6 5 40 DAYS WITH PRECIPITATION >= 5 8 3 2 6 1 4 2 6 4 8 7 7 58 DAYS WITH PRECIPITATION >= 1 12 9 5 13 10 7 2 9 5 9 12 14 107 DAYS WITH PRECIPITATION 14 13 10 15 10 9 3 11 11 11 14 15 136 GREATEST DAILY PRECIPITATION 33.0 8.0 30.0 16.0 7.0 43.0 9.0 25.0 101.0 60.0 46.0 56.0 101.0 DAY 5 11 11 21 10 17 12 24 17 11 9 14 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 1 0 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 2.8 2.8 2.8 3.6 2.6 2.7 2.4 4.6 4.1 5.8 3.4 5.0 3.5 PREVAILING WIND PERCENT 40.6 37.9 20.0 26.7 21.3 27.3 20.0 23.2 19.3 18.7 26.7 29.7 25.9 CALMS PERCENT OF WIND 45.8 43.6 56.8 46.0 54.8 39.3 49.7 47.7 61.3 69.0 58.0 49.0 51.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 257 274 291 297 267 258 314 291 287 277 268 226 267 VECTOR WIND MAGNITUDE(KNOTS) 1.2 1.1 0.5 0.6 0.4 0.5 0.5 0.9 0.8 1.2 0.9 2.3 0.8 WIND STEADINESES (MEAN %) 75.0 64.7 35.7 31.6 36.4 29.4 38.5 36.0 47.1 75.0 64.3 65.7 44.4 WIND SPEED (MEAN KNOTS) 1.6 1.7 1.4 1.9 1.1 1.7 1.3 2.5 1.7 1.6 1.4 3.5 1.8 FASTEST WIND DIRECTION 360 350 360 270 270 90 50 330 340 270 180 180 180 FASTEST WIND SPEED (KNOTS) 18 10 12 13 8 14 9 20 15 15 15 35 35 DAY 17 5 4 11 5 7 22 23 11 10 14 20 DAYS WITH SKY CLEAR (0-2)/8 6 4 5 8 10 15 23 16 10 4 7 6 114 DAYS WITH P.CLOUDY (3-6)/8 9 10 9 5 9 9 5 4 10 11 7 10 98 DAYS WITH CLOUDY (7-8)/8 16 14 17 17 12 6 3 11 10 16 16 15 153 DAYS WITH VISIBILITY =< 2 KM 1 4 8 0 3 1 0 0 0 2 1 4 24 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1022.6 1017.8 1016.0 1016.7 1014.7 1012.9 1009.7 1012.9 1016.7 1020.0 1026.1 1019.0 1017.1 MAX. QFE PRESSURE IN HPA 1038.5 1034.7 1028.8 1031.8 1026.4 1023.0 1018.7 1023.6 1026.9 1028.6 1036.7 1035.8 1038.5 DAY-HOUR 18- 6 11- 3 15- 9 19- 3 18- 9 17- 9 27- 6 26- 6 25- 6 18-15 23- 6 3-15 MIN. QFE PRESSURE IN HPA 1005.0 995.9 997.0 1007.1 1004.0 997.4 1001.9 999.2 1003.1 1006.4 1016.0 1001.9 995.9 DAY-HOUR 4-12 20-15 27-15 29- 3 9- 9 7-12 4-15 21-15 11-12 9-15 7-12 16-15 MEAN QNH PRESSURE IN HPA 1021.5 1016.6 1014.9 1015.6 1013.6 1011.8 1008.5 1011.7 1015.5 1018.8 1024.9 1017.9 1015.9 MAX. QNH PRESSURE IN HPA 1037.4 1033.6 1027.7 1030.7 1025.3 1021.9 1017.6 1022.5 1025.8 1027.5 1035.6 1034.7 1037.4 DAY-HOUR 18- 6 11- 3 15- 9 19- 3 18- 9 17- 9 27- 6 26- 6 25- 6 18-15 23- 6 3-15 MIN. QNH PRESSURE IN HPA 1003.9 994.8 995.9 1006.0 1002.9 996.3 1000.8 998.1 1002.0 1005.3 1014.9 1000.8 994.8 DAY-HOUR 4-12 20-15 27-15 29- 3 9- 9 7-12 4-15 21-15 11-12 9-15 7-12 16-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1022.3 1018.1 1016.3 1017.0 1015.4 1013.5 1010.4 1014.0 1017.2 1020.6 1026.2 1019.4 1017.5 MAX. QFE PRESSURE IN HPA 1036.5 1034.7 1026.4 1031.8 1024.0 1022.5 1017.8 1023.1 1025.7 1026.2 1035.1 1032.3 1036.5 DAY 18 11 5 19 19 18 27 26 25 19 23 10 MIN. QFE PRESSURE IN HPA 1006.5 998.3 997.7 1007.1 1006.0 1003.8 1003.6 1005.0 1006.2 1009.1 1017.7 1005.6 997.7 DAY 4 18 28 29 9 7 4 21 11 10 7 17 MEAN QNH PRESSURE IN HPA 1021.1 1017.0 1015.2 1015.8 1014.2 1012.4 1009.3 1012.8 1016.1 1019.4 1025.1 1018.3 1016.4 MAX. QNH PRESSURE IN HPA 1035.4 1033.6 1025.3 1030.7 1022.9 1021.4 1016.7 1022.0 1024.6 1025.1 1034.0 1031.2 1035.4 DAY 18 11 5 19 19 18 27 26 25 19 23 10 MIN. QNH PRESSURE IN HPA 1005.4 997.2 996.6 1006.0 1004.9 1002.7 1002.5 1003.9 1005.1 1008.0 1016.6 1004.5 996.6 DAY 4 18 28 29 9 7 4 21 11 10 7 17 MEAN QFF PRESSURE IN HPA 1021.4 1017.2 1015.5 1016.1 1014.6 1012.7 1009.6 1013.2 1016.4 1019.8 1025.4 1018.5 1016.7 MAX. QFF PRESSURE IN HPA 1035.6 1033.8 1025.6 1030.9 1023.2 1021.7 1017.0 1022.3 1024.9 1025.4 1034.2 1031.4 1035.6 DAY 18 11 5 19 19 18 27 26 25 19 23 10 MIN. QFF PRESSURE IN HPA 1005.7 997.5 996.9 1006.3 1005.2 1003.0 1002.8 1004.2 1005.4 1008.3 1016.9 1004.8 996.9 DAY 4 18 28 29 9 7 4 21 11 10 7 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1023.6 1019.0 1017.0 1017.5 1015.4 1013.6 1010.3 1014.0 1017.8 1021.0 1027.0 1019.7 1018.0 MAX. QFE PRESSURE IN HPA 1038.5 1034.5 1027.6 1031.0 1026.2 1022.7 1018.7 1023.6 1026.9 1027.5 1036.7 1032.1 1038.5 DAY 18 11 5 19 18 18 27 26 25 27 23 10 MIN. QFE PRESSURE IN HPA 1006.6 1004.4 999.8 1008.6 1004.4 1002.6 1002.6 1003.1 1006.5 1009.7 1018.5 1006.5 999.8 DAY 4 20 28 29 9 7 4 21 11 9 5 19 MEAN QNH PRESSURE IN HPA 1022.4 1017.9 1015.8 1016.4 1014.3 1012.4 1009.2 1012.9 1016.7 1019.8 1025.9 1018.5 1016.9 MAX. QNH PRESSURE IN HPA 1037.4 1033.4 1026.5 1029.9 1025.1 1021.6 1017.6 1022.5 1025.8 1026.4 1035.6 1031.0 1037.4 DAY 18 11 5 19 18 18 27 26 25 27 23 10 MIN. QNH PRESSURE IN HPA 1005.5 1003.3 998.7 1007.5 1003.3 1001.5 1001.5 1002.0 1005.4 1008.6 1017.4 1005.4 998.7 DAY 4 20 28 29 9 7 4 21 11 9 5 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1023.0 1018.3 1016.7 1016.9 1015.0 1013.3 1010.0 1012.9 1016.8 1019.9 1026.2 1019.2 1017.3 MAX. QFE PRESSURE IN HPA 1037.8 1032.7 1028.8 1029.9 1026.4 1023.0 1018.6 1022.5 1025.6 1028.1 1035.7 1031.8 1037.8 DAY 18 11 15 19 18 17 27 26 25 11 23 10 MIN. QFE PRESSURE IN HPA 1006.2 1002.3 1000.8 1007.7 1004.0 1001.3 1002.0 1002.0 1005.3 1008.2 1017.0 1004.4 1000.8 DAY 4 20 28 29 9 7 4 21 11 9 6 19 MEAN QNH PRESSURE IN HPA 1021.9 1017.2 1015.5 1015.7 1013.8 1012.2 1008.9 1011.8 1015.6 1018.7 1025.1 1018.0 1016.2 MAX. QNH PRESSURE IN HPA 1036.7 1031.6 1027.7 1028.8 1025.3 1021.9 1017.5 1021.4 1024.5 1027.0 1034.6 1030.7 1036.7 DAY 18 11 15 19 18 17 27 26 25 11 23 10 MIN. QNH PRESSURE IN HPA 1005.1 1001.2 999.7 1006.6 1002.9 1000.2 1000.9 1000.9 1004.2 1007.1 1015.9 1003.3 999.7 DAY 4 20 28 29 9 7 4 21 11 9 6 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1021.9 1016.6 1015.2 1016.0 1013.9 1012.3 1009.0 1011.8 1015.9 1019.3 1025.3 1018.3 1016.3 MAX. QFE PRESSURE IN HPA 1035.4 1029.8 1025.9 1028.1 1024.4 1022.7 1017.1 1021.2 1025.5 1028.1 1035.0 1033.9 1035.4 DAY 18 1 5 19 18 17 27 26 25 11 23 3 MIN. QFE PRESSURE IN HPA 1005.0 997.0 998.7 1007.4 1005.0 997.4 1002.0 999.9 1003.1 1006.6 1016.0 1002.8 997.0 DAY 4 20 27 29 9 7 4 21 11 9 7 19 MEAN QNH PRESSURE IN HPA 1020.8 1015.5 1014.0 1014.9 1012.8 1011.2 1007.8 1010.7 1014.7 1018.2 1024.2 1017.1 1015.2 MAX. QNH PRESSURE IN HPA 1034.3 1028.7 1024.8 1027.0 1023.3 1021.6 1016.0 1020.1 1024.4 1027.0 1033.9 1032.8 1034.3 DAY 18 1 5 19 18 17 27 26 25 11 23 3 MIN. QNH PRESSURE IN HPA 1003.9 995.9 997.6 1006.3 1003.9 996.3 1000.9 998.8 1002.0 1005.5 1014.9 1001.7 995.9 DAY 4 20 27 29 9 7 4 21 11 9 7 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1022.4 1016.9 1015.1 1016.2 1013.8 1011.9 1008.7 1011.7 1015.7 1019.2 1025.5 1018.6 1016.3 MAX. QFE PRESSURE IN HPA 1035.6 1031.5 1026.0 1029.2 1024.0 1022.6 1016.2 1020.9 1025.3 1028.6 1034.0 1035.8 1035.8 DAY 18 1 5 18 18 17 27 9 25 18 23 3 MIN. QFE PRESSURE IN HPA 1007.9 995.9 997.0 1007.9 1004.2 997.4 1001.9 999.2 1003.5 1006.4 1016.5 1001.9 995.9 DAY 4 20 27 28 9 7 4 21 11 9 7 16 MEAN QNH PRESSURE IN HPA 1021.2 1015.8 1013.9 1015.1 1012.7 1010.8 1007.5 1010.6 1014.6 1018.1 1024.4 1017.5 1015.2 MAX. QNH PRESSURE IN HPA 1034.5 1030.4 1024.9 1028.1 1022.9 1021.5 1015.1 1019.8 1024.2 1027.5 1032.9 1034.7 1034.7 DAY 18 1 5 18 18 17 27 9 25 18 23 3 MIN. QNH PRESSURE IN HPA 1006.8 994.8 995.9 1006.8 1003.1 996.3 1000.8 998.1 1002.4 1005.3 1015.4 1000.8 994.8 DAY 4 20 27 28 9 7 4 21 11 9 7 16 MEAN QFF PRESSURE IN HPA 1021.5 1016.0 1014.2 1015.4 1013.0 1011.1 1007.9 1010.9 1014.9 1018.4 1024.7 1017.8 1015.5 MAX. QFF PRESSURE IN HPA 1034.7 1030.6 1025.2 1028.3 1023.2 1021.8 1015.4 1020.1 1024.5 1027.8 1033.1 1034.9 1034.9 DAY 18 1 5 18 18 17 27 9 25 18 23 3 MIN. QFF PRESSURE IN HPA 1007.1 995.1 996.2 1007.1 1003.4 996.6 1001.1 998.4 1002.7 1005.6 1015.7 1001.1 995.1 DAY 4 20 27 28 9 7 4 21 11 9 7 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.5 10.3 9.6 14.7 19.4 23.8 26.4 25.6 23.6 19.0 12.8 7.2 16.9 MINIMUN AIR TEMPERATURE (C) 6.2 6.6 5.0 11.0 14.4 18.0 20.9 20.0 17.4 15.3 6.8 2.0 12.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 5 19 12 4 0 0 0 40 DAYS WITH MINIMUM TEMP. <=-4 0 0 1 0 0 0 0 0 0 0 0 3 4 DAYS WITH FREEZING MIN.<= 0 1 0 5 0 0 0 0 0 0 0 0 11 17 TEMPERATURE RECORDS LOWEST(C) 0.0 2.0 -5.0 5.0 9.0 14.0 15.0 16.0 11.0 10.0 1.0 -10.0 -10.0 DAY 1 4 8 1 14 13 1 11 11 11 27 28 MAXIMUM AIR TEMPERATURE (C) 14.4 14.1 14.5 17.7 23.0 27.7 29.6 29.2 27.5 22.4 17.0 11.7 20.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 7 19 15 8 0 0 0 50 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.0 28.0 25.0 26.0 32.0 33.0 35.0 34.0 30.0 28.0 22.0 24.0 35.0 DAY 16 22 18 24 28 19 20 12 5 11 15 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 7.5 9.5 6.7 8.6 9.7 8.7 9.2 10.1 7.1 10.2 9.7 8.7 MEAN DAILY TEMP. (MDT) (C) 10.3 10.4 9.7 14.3 18.7 22.8 25.3 24.6 22.5 18.8 11.9 6.8 16.4 COOLING DEG. DAYS(BASE 21 0C) 1.0 1.0 0.0 0.0 8.0 57.0 132.5 111.5 55.5 3.0 0.0 0.0 369.5 HEATING DEG. DAYS(BASE 18 0C) 243.0 217.5 256.0 113.0 23.5 0.0 0.0 0.0 2.0 16.5 183.5 346.5 1401.5 DEWPOINT (MEAN C) 6.6 6.9 6.4 12.3 15.5 19.3 22.4 23.3 20.5 16.7 10.0 3.6 13.6 MIXING RATIO (G/KG) 6.12 6.21 6.08 9.00 11.13 14.04 17.43 18.34 15.36 11.84 7.67 5.08 10.69 VAPOUR PRESSURE (HPA) 9.92 10.08 9.84 14.42 17.79 22.44 27.54 29.05 24.56 19.16 12.48 8.30 17.13 SATURATION DEF. (HPA) 3.42 3.16 2.73 2.61 5.32 7.63 7.47 4.44 5.21 3.32 2.78 2.61 4.23 RELATIVE HUMIDITY (MEAN %) 82 83 82 87 79 77 80 88 84 87 85 82 83 RELATIVE HUMIDITY (MAX. %) 91 95 97 98 96 94 94 97 97 97 97 94 96 RELATIVE HUMIDITY (MIN. %) 72 70 67 77 66 67 70 80 74 77 71 66 71 RELATIVE HUMIDITY (MEAN% 03UTC) 88 94 94 98 95 94 93 97 97 97 96 91 95 RELATIVE HUMIDITY (MEAN% 09UTC) 79 74 75 78 71 70 74 83 77 81 76 76 76 RELATIVE HUMIDITY (MEAN% 15UTC) 82 83 82 87 79 73 80 89 85 90 87 83 83 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 93.8 105.6 161.9 26.7 125.0 50.4 41.0 110.8 90.4 190.6 197.6 222.0 1415.8 DAYS WITH PRECIPITATION >=10 4 4 5 0 6 3 1 2 2 6 9 9 51 DAYS WITH PRECIPITATION >= 5 7 6 6 2 6 3 3 7 3 8 9 9 69 DAYS WITH PRECIPITATION >= 1 11 13 10 10 14 7 7 12 8 16 11 12 131 DAYS WITH PRECIPITATION 15 16 13 18 16 8 7 14 10 20 13 12 162 GREATEST DAILY PRECIPITATION 23.0 33.0 50.0 5.2 35.0 15.0 16.0 31.4 42.0 42.0 59.0 45.0 59.0 DAY 28 28 7 6 3 21 8 28 22 25 2 25 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 2 0 2 0 0 4 DAYS WITH SNOW OR SLEET 0 0 3 0 0 0 0 0 0 0 0 3 6 DAYS WITH DUST 0 1 1 0 0 0 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 2.9 3.8 3.6 2.8 3.7 3.8 4.0 4.5 3.8 4.6 4.4 6.4 4.1 PREVAILING WIND PERCENT 32.9 32.1 21.9 11.3 9.7 5.3 11.6 29.7 30.0 27.1 24.7 28.4 22.0 CALMS PERCENT OF WIND 52.3 55.0 57.4 74.0 67.7 80.7 72.3 34.8 30.7 54.2 49.3 46.5 56.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 223 245 258 276 291 273 246 268 253 259 262 261 255 VECTOR WIND MAGNITUDE(KNOTS) 1.8 1.5 1.1 0.4 0.4 0.2 0.7 1.4 1.1 1.5 1.2 2.3 1.1 WIND STEADINESES (MEAN %) 69.2 75.0 61.1 57.1 33.3 33.3 58.3 51.9 45.8 78.9 63.2 79.3 61.1 WIND SPEED (MEAN KNOTS) 2.6 2.0 1.8 0.7 1.2 0.6 1.2 2.7 2.4 1.9 1.9 2.9 1.8 FASTEST WIND DIRECTION 160 270 310 270 340 190 270 190 260 270 260 270 160 FASTEST WIND SPEED (KNOTS) 27 15 18 8 15 6 12 10 15 15 14 25 27 DAY 22 25 5 5 28 8 14 25 23 25 1 2 DAYS WITH SKY CLEAR (0-2)/8 1 2 8 2 5 9 10 10 7 4 12 7 77 DAYS WITH P.CLOUDY (3-6)/8 15 9 6 3 11 11 12 5 12 9 6 10 109 DAYS WITH CLOUDY (7-8)/8 15 17 17 25 15 10 9 16 11 18 12 14 179 DAYS WITH VISIBILITY =< 2 KM 6 3 6 6 3 1 0 0 0 2 4 4 35 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.3 1021.0 1017.9 1011.6 1012.7 1016.6 1011.6 1015.7 1020.7 1025.9 1026.0 1026.2 1018.7 MAX. QFE PRESSURE IN HPA 1030.7 1037.0 1035.0 1024.0 1025.2 1026.1 1019.0 1023.2 1037.8 1038.1 1039.5 1047.8 1047.8 DAY-HOUR 5- 6 7- 9 7- 9 2- 6 13- 6 12- 9 9- 6 5- 6 24- 6 18- 3 2- 9 26- 6 MIN. QFE PRESSURE IN HPA 1008.8 1004.0 1002.0 1000.1 1001.4 1004.0 1002.0 1005.8 1011.4 1017.0 1014.1 1008.9 1000.1 DAY-HOUR 15-15 23-12 18- 9 29- 3 4-12 19-15 23-15 12-15 21-15 20-15 16- 3 10- 3 MEAN QNH PRESSURE IN HPA 1017.2 1019.8 1016.8 1010.5 1011.6 1015.4 1010.5 1014.5 1019.6 1024.7 1024.9 1025.1 1017.5 MAX. QNH PRESSURE IN HPA 1029.6 1035.9 1033.9 1022.9 1024.1 1025.0 1017.9 1022.1 1036.7 1037.0 1038.4 1046.6 1046.6 DAY-HOUR 5- 6 7- 9 7- 9 2- 6 13- 6 12- 9 9- 6 5- 6 24- 6 18- 3 2- 9 26- 6 MIN. QNH PRESSURE IN HPA 1007.7 1002.9 1000.9 999.0 1000.3 1002.9 1000.9 1004.7 1010.3 1015.9 1013.0 1007.8 999.0 DAY-HOUR 15-15 23-12 18- 9 29- 3 4-12 19-15 23-15 12-15 21-15 20-15 16- 3 10- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1021.2 1018.3 1012.1 1013.4 1017.8 1012.6 1016.5 1021.7 1026.2 1026.1 1026.3 1019.3 MAX. QFE PRESSURE IN HPA 1030.6 1036.2 1033.0 1022.8 1025.1 1025.1 1018.6 1022.4 1037.1 1038.1 1036.1 1046.4 1046.4 DAY 5 7 7 2 13 13 9 5 24 18 2 26 MIN. QFE PRESSURE IN HPA 1009.8 1005.0 1003.4 1000.1 1006.1 1008.6 1006.1 1009.4 1013.2 1019.5 1014.1 1008.9 1000.1 DAY 26 23 5 29 4 19 23 12 3 21 16 10 MEAN QNH PRESSURE IN HPA 1017.8 1020.0 1017.2 1010.9 1012.3 1016.7 1011.5 1015.4 1020.5 1025.1 1024.9 1025.2 1018.1 MAX. QNH PRESSURE IN HPA 1029.5 1035.1 1031.9 1021.7 1024.0 1024.0 1017.5 1021.3 1036.0 1037.0 1035.0 1045.2 1045.2 DAY 5 7 7 2 13 13 9 5 24 18 2 26 MIN. QNH PRESSURE IN HPA 1008.7 1003.9 1002.3 999.0 1005.0 1007.5 1005.0 1008.3 1012.1 1018.4 1013.0 1007.8 999.0 DAY 26 23 5 29 4 19 23 12 3 21 16 10 MEAN QFF PRESSURE IN HPA 1018.1 1020.3 1017.4 1011.2 1012.6 1017.0 1011.8 1015.7 1020.8 1025.4 1025.2 1025.4 1018.4 MAX. QFF PRESSURE IN HPA 1029.7 1035.3 1032.1 1022.0 1024.3 1024.3 1017.8 1021.6 1036.3 1037.3 1035.2 1045.5 1045.5 DAY 5 7 7 2 13 13 9 5 24 18 2 26 MIN. QFF PRESSURE IN HPA 1009.0 1004.2 1002.6 999.3 1005.3 1007.8 1005.3 1008.6 1012.4 1018.7 1013.3 1008.1 999.3 DAY 26 23 5 29 4 19 23 12 3 21 16 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.7 1021.9 1018.9 1012.5 1013.6 1017.6 1012.6 1016.9 1022.0 1027.1 1027.4 1027.2 1019.8 MAX. QFE PRESSURE IN HPA 1030.7 1036.8 1034.4 1024.0 1025.2 1025.4 1019.0 1023.2 1037.8 1038.0 1039.4 1047.8 1047.8 DAY 5 7 7 2 13 12 9 5 24 18 2 26 MIN. QFE PRESSURE IN HPA 1010.4 1006.1 1002.4 1000.6 1004.4 1008.6 1006.2 1009.2 1012.8 1020.6 1018.2 1010.4 1000.6 DAY 26 23 5 29 4 19 23 12 21 31 24 10 MEAN QNH PRESSURE IN HPA 1018.6 1020.7 1017.8 1011.4 1012.5 1016.4 1011.5 1015.7 1020.9 1026.0 1026.3 1026.1 1018.7 MAX. QNH PRESSURE IN HPA 1029.6 1035.7 1033.3 1022.9 1024.1 1024.3 1017.9 1022.1 1036.7 1036.9 1038.3 1046.6 1046.6 DAY 5 7 7 2 13 12 9 5 24 18 2 26 MIN. QNH PRESSURE IN HPA 1009.3 1005.0 1001.3 999.5 1003.3 1007.5 1005.1 1008.1 1011.7 1019.5 1017.1 1009.3 999.5 DAY 26 23 5 29 4 19 23 12 21 31 24 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1021.1 1018.2 1011.6 1013.0 1016.8 1011.8 1015.7 1020.7 1026.2 1026.3 1026.3 1018.8 MAX. QFE PRESSURE IN HPA 1029.9 1037.0 1035.0 1024.0 1024.8 1026.1 1019.0 1022.4 1035.6 1036.6 1039.5 1047.0 1047.0 DAY 5 7 7 2 13 12 9 5 24 18 2 26 MIN. QFE PRESSURE IN HPA 1010.6 1005.0 1002.0 1000.8 1003.1 1007.0 1005.4 1007.4 1011.8 1019.0 1015.4 1012.0 1000.8 DAY 15 23 18 29 4 19 23 12 21 31 24 10 MEAN QNH PRESSURE IN HPA 1017.2 1019.9 1017.1 1010.5 1011.8 1015.6 1010.7 1014.6 1019.6 1025.0 1025.2 1025.2 1017.7 MAX. QNH PRESSURE IN HPA 1028.8 1035.9 1033.9 1022.9 1023.7 1025.0 1017.9 1021.3 1034.5 1035.5 1038.4 1045.8 1045.8 DAY 5 7 7 2 13 12 9 5 24 18 2 26 MIN. QNH PRESSURE IN HPA 1009.5 1003.9 1000.9 999.7 1002.0 1005.9 1004.3 1006.3 1010.7 1017.9 1014.3 1010.9 999.7 DAY 15 23 18 29 4 19 23 12 21 31 24 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.2 1020.1 1016.9 1010.8 1011.9 1015.6 1010.7 1014.7 1019.5 1024.9 1025.1 1025.4 1017.7 MAX. QFE PRESSURE IN HPA 1028.8 1036.0 1034.3 1022.8 1023.0 1026.0 1018.0 1022.0 1034.2 1034.0 1038.8 1046.2 1046.2 DAY 5 7 7 2 12 12 8 5 24 18 2 25 MIN. QFE PRESSURE IN HPA 1009.0 1004.0 1002.6 1002.3 1001.4 1005.1 1003.4 1006.2 1011.6 1017.8 1014.7 1012.2 1001.4 DAY 14 23 30 28 4 19 23 12 21 20 22 10 MEAN QNH PRESSURE IN HPA 1016.0 1018.9 1015.8 1009.6 1010.8 1014.4 1009.6 1013.6 1018.4 1023.8 1023.9 1024.3 1016.6 MAX. QNH PRESSURE IN HPA 1027.7 1034.9 1033.2 1021.7 1021.9 1024.9 1016.9 1020.9 1033.1 1032.9 1037.7 1045.0 1045.0 DAY 5 7 7 2 12 12 8 5 24 18 2 25 MIN. QNH PRESSURE IN HPA 1007.9 1002.9 1001.5 1001.2 1000.3 1004.0 1002.3 1005.1 1010.5 1016.7 1013.6 1011.1 1000.3 DAY 14 23 30 28 4 19 23 12 21 20 22 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1017.5 1020.7 1017.3 1011.1 1011.9 1015.2 1010.4 1014.6 1019.7 1025.1 1025.2 1025.9 1017.9 MAX. QFE PRESSURE IN HPA 1028.5 1035.2 1033.6 1022.6 1023.1 1026.0 1018.0 1021.6 1035.2 1033.6 1038.7 1046.2 1046.2 DAY 5 7 7 2 13 12 8 5 23 17 2 25 MIN. QFE PRESSURE IN HPA 1008.8 1004.8 1003.0 1002.7 1001.8 1004.0 1002.0 1005.8 1011.4 1017.0 1014.9 1013.4 1001.8 DAY 15 23 30 28 4 19 23 12 21 20 22 9 MEAN QNH PRESSURE IN HPA 1016.4 1019.5 1016.2 1010.0 1010.8 1014.1 1009.2 1013.5 1018.5 1023.9 1024.1 1024.8 1016.7 MAX. QNH PRESSURE IN HPA 1027.4 1034.1 1032.5 1021.5 1022.0 1024.9 1016.9 1020.5 1034.1 1032.5 1037.6 1045.0 1045.0 DAY 5 7 7 2 13 12 8 5 23 17 2 25 MIN. QNH PRESSURE IN HPA 1007.7 1003.7 1001.9 1001.6 1000.7 1002.9 1000.9 1004.7 1010.3 1015.9 1013.8 1012.3 1000.7 DAY 15 23 30 28 4 19 23 12 21 20 22 9 MEAN QFF PRESSURE IN HPA 1016.7 1019.8 1016.5 1010.3 1011.1 1014.4 1009.6 1013.8 1018.9 1024.2 1024.3 1025.0 1017.0 MAX. QFF PRESSURE IN HPA 1027.6 1034.3 1032.7 1021.8 1022.3 1025.2 1017.2 1020.8 1034.4 1032.8 1037.8 1045.3 1045.3 DAY 5 7 7 2 13 12 8 5 23 17 2 25 MIN. QFF PRESSURE IN HPA 1008.0 1004.0 1002.2 1001.9 1001.0 1003.2 1001.2 1005.0 1010.6 1016.2 1014.1 1012.6 1001.0 DAY 15 23 30 28 4 19 23 12 21 20 22 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.2 6.4 9.4 12.9 20.8 25.6 25.6 25.0 22.0 17.6 14.8 7.5 15.8 MINIMUN AIR TEMPERATURE (C) -4.3 2.9 6.8 7.9 14.1 19.5 20.0 19.9 17.2 11.3 8.3 2.5 10.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 8 13 11 3 0 1 0 36 DAYS WITH MINIMUM TEMP. <=-4 16 1 0 0 0 0 0 0 0 0 0 3 20 DAYS WITH FREEZING MIN.<= 0 26 5 0 0 0 0 0 0 0 0 3 11 45 TEMPERATURE RECORDS LOWEST(C) -19.0 -7.0 1.0 1.0 9.0 17.0 17.0 16.0 12.0 8.0 -2.0 -7.0 -19.0 DAY 20 1 8 15 2 1 3 28 28 8 30 27 MAXIMUM AIR TEMPERATURE (C) 6.8 9.3 12.0 16.4 24.8 29.2 29.1 28.8 25.7 22.1 19.5 11.3 19.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 11 15 16 3 0 2 0 47 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 17.0 15.0 24.0 28.0 29.0 33.0 32.0 33.0 30.0 27.0 30.0 19.0 33.0 DAY 16 2 25 26 8 3 15 3 1 1 18 3 DIF. BETWEEN (MAX.-MIN.) (C) 11.1 6.4 5.2 8.5 10.7 9.7 9.1 8.9 8.5 10.8 11.2 8.8 9.1 MEAN DAILY TEMP. (MDT) (C) 1.3 6.1 9.4 12.1 19.5 24.3 24.5 24.4 21.5 16.7 13.9 6.9 15.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 10.0 100.5 110.0 104.0 31.0 0.0 3.5 0.0 359.0 HEATING DEG. DAYS(BASE 18 0C) 519.0 344.5 266.5 175.5 18.0 0.0 0.0 0.0 2.0 49.5 138.5 343.5 1857.0 DEWPOINT (MEAN C) -1.2 4.2 7.0 9.1 15.7 21.3 20.9 20.5 17.9 13.4 9.4 5.1 11.9 MIXING RATIO (G/KG) 3.54 5.13 6.31 7.27 11.40 16.05 15.71 15.22 12.94 9.65 7.62 5.54 9.70 VAPOUR PRESSURE (HPA) 5.82 8.37 10.24 11.72 18.27 25.41 24.98 24.23 20.74 15.66 12.36 9.07 15.57 SATURATION DEF. (HPA) 1.74 1.42 1.78 3.93 7.07 7.92 8.45 8.19 6.30 5.19 5.42 1.77 4.93 RELATIVE HUMIDITY (MEAN %) 81 87 87 80 74 78 77 77 79 79 76 86 80 RELATIVE HUMIDITY (MAX. %) 92 96 96 94 93 96 95 95 95 95 93 97 95 RELATIVE HUMIDITY (MIN. %) 68 78 75 68 61 68 65 66 67 63 61 73 68 RELATIVE HUMIDITY (MEAN% 03UTC) 88 95 96 94 90 96 92 95 92 95 86 96 93 RELATIVE HUMIDITY (MEAN% 09UTC) 73 84 85 74 67 71 69 68 70 69 69 81 73 RELATIVE HUMIDITY (MEAN% 15UTC) 82 84 86 78 72 76 75 75 81 81 79 83 79 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 160.2 100.6 95.8 263.2 11.2 7.6 22.4 48.2 67.6 80.8 85.0 112.8 1055.4 DAYS WITH PRECIPITATION >=10 6 3 3 10 0 0 0 1 1 3 4 3 34 DAYS WITH PRECIPITATION >= 5 8 8 7 11 2 0 1 2 4 3 4 7 57 DAYS WITH PRECIPITATION >= 1 12 12 17 15 2 2 6 9 11 8 6 12 112 DAYS WITH PRECIPITATION 13 14 20 15 2 4 10 12 14 11 6 15 136 GREATEST DAILY PRECIPITATION 37.0 27.0 23.0 47.0 6.0 4.0 8.0 28.0 25.0 35.0 26.0 33.0 47.0 DAY 29 26 7 21 2 21 5 6 12 3 9 18 DAY WITH THUNDER STORM 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 6 1 0 0 0 0 0 0 0 0 0 1 8 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 4.4 3.2 3.4 3.6 3.7 3.5 3.2 2.8 2.4 3.5 4.4 3.8 3.4 PREVAILING WIND PERCENT 23.9 35.2 34.8 25.3 31.6 30.7 39.4 31.6 30.7 21.3 22.7 26.5 29.5 CALMS PERCENT OF WIND 43.2 42.8 45.2 49.3 45.8 32.7 21.9 26.5 46.7 71.0 64.0 70.3 46.6 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 239 259 270 277 270 265 262 264 255 266 230 269 258 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.7 1.4 0.9 0.8 0.9 1.2 0.7 1.0 0.7 1.6 1.0 1.1 WIND STEADINESES (MEAN %) 68.2 89.5 77.8 45.0 42.1 39.1 52.2 35.0 71.4 77.8 72.7 90.9 61.1 WIND SPEED (MEAN KNOTS) 2.2 1.9 1.8 2.0 1.9 2.3 2.3 2.0 1.4 0.9 2.2 1.1 1.8 FASTEST WIND DIRECTION 270 270 240 360 270 290 270 260 90 270 180 270 180 FASTEST WIND SPEED (KNOTS) 12 12 9 10 14 9 9 9 6 15 25 15 25 DAY 18 9 8 6 10 23 22 22 3 3 21 17 DAYS WITH SKY CLEAR (0-2)/8 10 3 0 5 12 12 9 7 8 9 8 9 92 DAYS WITH P.CLOUDY (3-6)/8 12 6 5 5 12 9 9 11 9 13 14 7 112 DAYS WITH CLOUDY (7-8)/8 9 20 26 20 7 9 13 13 13 9 8 15 162 DAYS WITH VISIBILITY =< 2 KM 6 6 4 2 5 1 0 1 3 3 9 3 43 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1029.7 1024.1 1020.3 1015.8 1015.7 1010.7 1014.5 1015.1 1018.1 1025.9 1022.1 1028.6 1020.0 MAX. QFE PRESSURE IN HPA 1041.0 1038.4 1033.0 1024.0 1024.0 1019.1 1024.2 1024.2 1034.0 1038.0 1039.0 1041.7 1041.7 DAY-HOUR 21- 9 27- 6 8- 3 23- 6 13- 9 22- 9 22- 9 21- 3 16- 3 29- 6 11- 3 26- 6 MIN. QFE PRESSURE IN HPA 1014.8 1013.0 1008.0 998.0 1006.8 1000.0 1003.7 1001.4 1006.0 1008.4 1001.0 1011.7 998.0 DAY-HOUR 16- 3 2-12 26-15 6- 9 11- 9 15-12 2-12 13-12 11-12 2-15 27- 3 23-12 MEAN QNH PRESSURE IN HPA 1028.6 1023.0 1019.1 1014.7 1014.5 1009.6 1013.3 1013.9 1017.0 1024.7 1020.9 1027.4 1018.9 MAX. QNH PRESSURE IN HPA 1039.9 1037.3 1031.9 1022.9 1022.9 1018.0 1023.1 1023.1 1032.9 1036.9 1037.9 1040.6 1040.6 DAY-HOUR 21- 9 27- 6 8- 3 23- 6 13- 9 22- 9 22- 9 21- 3 16- 3 29- 6 11- 3 26- 6 MIN. QNH PRESSURE IN HPA 1013.7 1011.9 1006.9 996.9 1005.7 998.9 1002.6 1000.3 1004.9 1007.3 999.9 1010.6 996.9 DAY-HOUR 16- 3 2-12 26-15 6- 9 11- 9 15-12 2-12 13-12 11-12 2-15 27- 3 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 1029.6 1024.2 1020.3 1016.0 1016.6 1011.9 1015.6 1016.3 1019.0 1026.1 1022.3 1028.7 1020.6 MAX. QFE PRESSURE IN HPA 1041.0 1037.2 1033.0 1023.2 1022.2 1018.0 1024.2 1024.2 1034.0 1037.0 1039.0 1040.0 1041.0 DAY 30 27 8 23 14 23 23 21 16 29 11 26 MIN. QFE PRESSURE IN HPA 1014.8 1013.4 1010.0 1001.6 1009.0 1004.2 1008.4 1005.8 1006.9 1014.4 1001.0 1012.8 1001.0 DAY 16 2 3 6 7 15 2 13 11 5 27 23 MEAN QNH PRESSURE IN HPA 1028.5 1023.1 1019.2 1014.9 1015.5 1010.8 1014.5 1015.2 1017.8 1025.0 1021.2 1027.6 1019.4 MAX. QNH PRESSURE IN HPA 1039.9 1036.1 1031.9 1022.1 1021.1 1016.9 1023.1 1023.1 1032.9 1035.9 1037.9 1038.9 1039.9 DAY 30 27 8 23 14 23 23 21 16 29 11 26 MIN. QNH PRESSURE IN HPA 1013.7 1012.3 1008.9 1000.5 1007.9 1003.1 1007.3 1004.7 1005.8 1013.3 999.9 1011.7 999.9 DAY 16 2 3 6 7 15 2 13 11 5 27 23 MEAN QFF PRESSURE IN HPA 1028.7 1023.3 1019.4 1015.2 1015.8 1011.1 1014.8 1015.5 1018.1 1025.3 1021.4 1027.9 1019.7 MAX. QFF PRESSURE IN HPA 1040.1 1036.3 1032.1 1022.3 1021.4 1017.2 1023.4 1023.4 1033.2 1036.1 1038.1 1039.1 1040.1 DAY 30 27 8 23 14 23 23 21 16 29 11 26 MIN. QFF PRESSURE IN HPA 1013.9 1012.5 1009.2 1000.8 1008.2 1003.4 1007.6 1005.0 1006.1 1013.6 1000.2 1012.0 1000.2 DAY 16 2 3 6 7 15 2 13 11 5 27 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1030.7 1025.0 1021.2 1016.6 1016.6 1011.5 1015.5 1016.3 1019.4 1027.0 1023.0 1029.7 1021.0 MAX. QFE PRESSURE IN HPA 1041.0 1038.4 1033.0 1024.0 1023.2 1018.4 1024.0 1023.6 1032.8 1038.0 1038.6 1041.7 1041.7 DAY 30 27 8 23 13 23 22 21 16 29 11 26 MIN. QFE PRESSURE IN HPA 1015.2 1013.8 1011.4 1001.0 1009.0 1003.0 1007.8 1004.9 1007.0 1014.2 1001.0 1013.0 1001.0 DAY 16 2 3 6 7 15 2 13 11 2 27 23 MEAN QNH PRESSURE IN HPA 1029.5 1023.8 1020.1 1015.4 1015.5 1010.3 1014.4 1015.1 1018.2 1025.8 1021.9 1028.5 1019.9 MAX. QNH PRESSURE IN HPA 1039.9 1037.3 1031.9 1022.9 1022.1 1017.3 1022.9 1022.5 1031.7 1036.9 1037.5 1040.6 1040.6 DAY 30 27 8 23 13 23 22 21 16 29 11 26 MIN. QNH PRESSURE IN HPA 1014.1 1012.7 1010.3 999.9 1007.9 1001.9 1006.7 1003.8 1005.9 1013.1 999.9 1011.9 999.9 DAY 16 2 3 6 7 15 2 13 11 2 27 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1030.0 1024.5 1020.6 1016.1 1015.8 1010.9 1014.6 1015.0 1018.3 1026.3 1022.3 1029.0 1020.3 MAX. QFE PRESSURE IN HPA 1041.0 1038.4 1031.9 1023.4 1024.0 1019.1 1024.2 1022.4 1032.0 1037.0 1038.0 1040.4 1041.0 DAY 21 27 8 23 13 22 22 20 16 29 11 26 MIN. QFE PRESSURE IN HPA 1015.3 1013.6 1010.0 998.0 1006.8 1001.0 1005.2 1002.8 1006.6 1011.6 1005.0 1012.0 998.0 DAY 16 2 26 6 11 15 2 13 11 2 27 23 MEAN QNH PRESSURE IN HPA 1028.8 1023.4 1019.5 1015.0 1014.7 1009.7 1013.5 1013.9 1017.2 1025.1 1021.1 1027.8 1019.1 MAX. QNH PRESSURE IN HPA 1039.9 1037.3 1030.8 1022.3 1022.9 1018.0 1023.1 1021.3 1030.9 1035.9 1036.9 1039.3 1039.9 DAY 21 27 8 23 13 22 22 20 16 29 11 26 MIN. QNH PRESSURE IN HPA 1014.2 1012.5 1008.9 996.9 1005.7 999.9 1004.1 1001.7 1005.5 1010.5 1003.9 1010.9 996.9 DAY 16 2 26 6 11 15 2 13 11 2 27 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 1029.1 1023.3 1019.6 1015.2 1014.8 1009.9 1013.5 1013.9 1017.0 1025.0 1021.4 1027.7 1019.2 MAX. QFE PRESSURE IN HPA 1040.0 1036.2 1029.6 1022.8 1023.6 1018.2 1023.8 1022.2 1031.6 1036.0 1037.0 1038.4 1040.0 DAY 21 27 8 15 13 22 22 20 16 29 10 26 MIN. QFE PRESSURE IN HPA 1014.8 1013.0 1009.0 1000.0 1007.4 1000.0 1003.7 1001.4 1006.0 1009.0 1003.6 1011.7 1000.0 DAY 16 2 26 6 7 15 2 13 11 2 26 23 MEAN QNH PRESSURE IN HPA 1027.9 1022.2 1018.5 1014.1 1013.7 1008.8 1012.4 1012.7 1015.9 1023.9 1020.3 1026.5 1018.1 MAX. QNH PRESSURE IN HPA 1038.9 1035.1 1028.5 1021.7 1022.5 1017.1 1022.7 1021.1 1030.5 1034.9 1035.9 1037.3 1038.9 DAY 21 27 8 15 13 22 22 20 16 29 10 26 MIN. QNH PRESSURE IN HPA 1013.7 1011.9 1007.9 998.9 1006.3 998.9 1002.6 1000.3 1004.9 1007.9 1002.5 1010.6 998.9 DAY 16 2 26 6 7 15 2 13 11 2 26 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1029.4 1023.6 1019.6 1015.3 1014.6 1009.6 1013.2 1013.9 1017.1 1025.1 1021.4 1027.8 1019.2 MAX. QFE PRESSURE IN HPA 1040.6 1035.4 1029.6 1023.0 1023.4 1018.0 1023.6 1023.2 1032.0 1036.0 1038.4 1039.4 1040.6 DAY 21 27 8 14 13 22 22 20 15 29 10 25 MIN. QFE PRESSURE IN HPA 1016.2 1013.2 1008.0 1006.4 1007.2 1000.6 1003.8 1001.6 1006.6 1008.4 1002.0 1011.8 1000.6 DAY 16 2 26 5 7 15 2 13 10 2 26 23 MEAN QNH PRESSURE IN HPA 1028.3 1022.4 1018.5 1014.2 1013.4 1008.4 1012.0 1012.8 1016.0 1024.0 1020.3 1026.7 1018.1 MAX. QNH PRESSURE IN HPA 1039.5 1034.3 1028.5 1021.9 1022.3 1016.9 1022.5 1022.1 1030.9 1034.9 1037.3 1038.3 1039.5 DAY 21 27 8 14 13 22 22 20 15 29 10 25 MIN. QNH PRESSURE IN HPA 1015.1 1012.1 1006.9 1005.3 1006.1 999.5 1002.7 1000.5 1005.5 1007.3 1000.9 1010.7 999.5 DAY 16 2 26 5 7 15 2 13 10 2 26 23 MEAN QFF PRESSURE IN HPA 1028.5 1022.7 1018.8 1014.4 1013.7 1008.8 1012.4 1013.1 1016.3 1024.3 1020.6 1026.9 1018.4 MAX. QFF PRESSURE IN HPA 1039.7 1034.5 1028.7 1022.1 1022.6 1017.2 1022.8 1022.4 1031.2 1035.1 1037.5 1038.5 1039.7 DAY 21 27 8 14 13 22 22 20 15 29 10 25 MIN. QFF PRESSURE IN HPA 1015.4 1012.4 1007.2 1005.6 1006.4 999.8 1003.0 1000.8 1005.8 1007.6 1001.2 1011.0 999.8 DAY 16 2 26 6 7 15 2 13 10 2 26 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.4 8.8 9.5 13.1 20.1 24.9 26.2 26.1 22.3 16.2 14.7 12.3 16.6 MINIMUN AIR TEMPERATURE (C) 1.7 2.4 5.9 8.4 13.4 18.1 20.2 20.1 17.0 12.3 7.9 5.4 11.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 5 15 13 2 0 0 0 35 DAYS WITH MINIMUM TEMP. <=-4 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH FREEZING MIN.<= 0 7 8 2 0 0 0 0 0 0 0 0 1 18 TEMPERATURE RECORDS LOWEST(C) -5.0 -6.0 -1.0 3.0 8.0 12.0 16.0 15.0 12.0 7.0 3.0 -1.0 -6.0 DAY 6 1 13 10 8 27 1 28 23 27 30 23 MAXIMUM AIR TEMPERATURE (C) 8.2 13.8 12.3 16.6 24.4 28.9 30.0 30.2 26.1 19.3 19.6 17.0 20.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 2 10 18 21 5 0 1 1 59 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 12.0 23.0 24.0 33.0 30.0 32.0 37.0 35.0 31.0 29.0 30.0 30.0 37.0 DAY 1 12 31 28 15 3 17 13 9 7 16 14 DIF. BETWEEN (MAX.-MIN.) (C) 6.5 11.4 6.4 8.2 11.0 10.8 9.8 10.1 9.1 7.0 11.7 11.6 9.4 MEAN DAILY TEMP. (MDT) (C) 5.0 8.1 9.1 12.5 18.9 23.5 25.1 25.1 21.6 15.8 13.8 11.2 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.0 3.5 74.5 127.5 128.0 36.5 1.5 1.0 0.0 374.5 HEATING DEG. DAYS(BASE 18 0C) 404.5 277.5 276.5 171.0 19.5 0.0 0.0 0.0 2.5 86.5 131.0 213.0 1582.0 DEWPOINT (MEAN C) 3.0 3.9 6.4 9.0 14.4 19.1 20.8 21.4 18.5 13.8 10.5 7.2 12.3 MIXING RATIO (G/KG) 4.68 5.05 5.98 7.26 10.30 13.98 15.61 16.12 13.40 10.07 7.98 6.46 9.74 VAPOUR PRESSURE (HPA) 7.65 8.19 9.73 11.71 16.56 22.32 24.82 25.63 21.51 16.23 12.89 10.48 15.65 SATURATION DEF. (HPA) 1.46 3.74 2.40 4.08 7.82 9.71 10.05 8.95 6.03 2.84 4.58 4.47 5.51 RELATIVE HUMIDITY (MEAN %) 86 75 82 78 72 72 75 77 81 87 79 75 78 RELATIVE HUMIDITY (MAX. %) 95 94 94 94 93 93 93 95 96 97 96 91 94 RELATIVE HUMIDITY (MIN. %) 76 56 71 66 59 58 63 64 71 78 63 59 65 RELATIVE HUMIDITY (MEAN% 03UTC) 95 92 94 94 93 93 93 95 96 96 94 85 93 RELATIVE HUMIDITY (MEAN% 09UTC) 83 69 78 70 64 63 68 68 75 81 72 68 72 RELATIVE HUMIDITY (MEAN% 15UTC) 83 72 78 75 65 70 71 72 79 87 78 75 75 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 143.6 21.0 73.0 59.0 31.2 22.8 84.0 66.0 200.0 360.8 51.0 59.0 1171.4 DAYS WITH PRECIPITATION >=10 7 1 2 1 1 0 5 1 5 12 1 3 39 DAYS WITH PRECIPITATION >= 5 12 2 6 5 2 1 6 2 9 15 2 4 66 DAYS WITH PRECIPITATION >= 1 16 4 11 14 6 8 9 6 15 19 7 5 120 DAYS WITH PRECIPITATION 16 5 15 16 9 12 9 6 16 19 9 6 138 GREATEST DAILY PRECIPITATION 19.0 13.0 26.0 15.0 19.0 9.0 19.0 51.0 71.0 88.0 29.0 20.0 88.0 DAY 30 13 12 20 4 1 23 8 19 22 10 18 DAY WITH THUNDER STORM 0 0 0 0 0 1 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 180 270 PREVAILING WIND SPEED(KNOTS) 3.3 2.7 2.5 2.5 3.5 3.3 3.1 3.6 3.2 4.3 3.7 12.1 3.3 PREVAILING WIND PERCENT 40.0 34.3 34.8 21.3 12.3 13.3 20.0 11.0 34.7 42.6 12.7 10.3 23.9 CALMS PERCENT OF WIND 52.3 52.1 58.7 63.3 78.1 70.7 65.8 73.5 52.0 47.1 76.0 66.5 63.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 265 240 268 297 313 259 268 294 279 266 224 208 258 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.9 0.8 0.4 0.5 0.4 0.5 0.5 1.2 1.9 0.6 1.4 0.8 WIND STEADINESES (MEAN %) 93.8 70.4 72.7 36.4 62.5 44.4 45.5 55.6 70.6 86.4 42.9 63.6 53.3 WIND SPEED (MEAN KNOTS) 1.6 2.7 1.1 1.1 0.8 0.9 1.1 0.9 1.7 2.2 1.4 2.2 1.5 FASTEST WIND DIRECTION 270 240 270 90 360 260 270 270 340 270 180 180 240 FASTEST WIND SPEED (KNOTS) 10 30 8 8 8 8 8 15 10 28 25 25 30 DAY 15 26 12 5 1 10 18 26 4 22 27 27 DAYS WITH SKY CLEAR (0-2)/8 7 9 3 3 10 12 9 7 7 2 10 9 88 DAYS WITH P.CLOUDY (3-6)/8 4 10 5 9 13 8 10 13 5 5 10 12 104 DAYS WITH CLOUDY (7-8)/8 20 9 23 18 8 10 12 11 18 24 10 10 173 DAYS WITH VISIBILITY =< 2 KM 1 5 4 2 2 0 0 0 0 0 4 4 22 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1023.6 1019.0 1023.7 1016.8 1017.8 1016.3 1014.5 1015.6 1020.3 1019.9 1018.2 1020.5 1018.8 MAX. QFE PRESSURE IN HPA 1037.4 1033.1 1040.4 1030.2 1033.0 1024.6 1022.8 1032.4 1030.0 1032.0 1031.0 1039.4 1040.4 DAY-HOUR 29- 9 1- 6 15- 3 9- 9 20- 3 2- 3 24- 6 8- 9 19- 6 4-15 10- 6 22- 3 MIN. QFE PRESSURE IN HPA 1007.0 1000.1 1003.8 1001.8 1006.9 1007.0 1003.4 1003.4 1011.0 1004.4 1001.2 1009.0 1000.1 DAY-HOUR 11-12 9-12 31-15 3-15 16- 3 8-15 29-15 13-15 8-15 25-15 17-15 14-12 MEAN QNH PRESSURE IN HPA 1022.5 1017.9 1022.5 1015.7 1016.7 1015.1 1013.3 1014.5 1019.1 1018.7 1017.0 1019.3 1017.7 MAX. QNH PRESSURE IN HPA 1036.3 1032.0 1039.3 1029.1 1031.9 1023.5 1021.7 1031.3 1028.9 1030.9 1029.9 1038.3 1039.3 DAY-HOUR 29- 9 1- 6 15- 3 9- 9 20- 3 2- 3 24- 6 8- 9 19- 6 4-15 10- 6 22- 3 MIN. QNH PRESSURE IN HPA 1005.9 999.0 1002.7 1000.7 1005.8 1005.9 1002.3 1002.3 1009.9 1003.3 1000.1 1007.9 999.0 DAY-HOUR 11-12 9-12 31-15 3-15 16- 3 8-15 29-15 13-15 8-15 25-15 17-15 14-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1023.5 1019.4 1024.1 1017.2 1018.6 1017.6 1015.5 1016.6 1021.1 1020.3 1018.8 1021.1 1019.5 MAX. QFE PRESSURE IN HPA 1036.1 1032.2 1040.4 1028.8 1033.0 1024.6 1022.2 1031.1 1028.8 1031.7 1029.2 1039.4 1040.4 DAY 31 1 15 9 20 2 24 9 30 5 10 22 MIN. QFE PRESSURE IN HPA 1008.3 1001.0 1014.0 1006.2 1006.9 1010.0 1009.3 1007.2 1013.4 1008.6 1006.7 1010.0 1001.0 DAY 8 23 19 28 16 8 29 31 9 25 27 14 MEAN QNH PRESSURE IN HPA 1022.3 1018.2 1022.9 1016.1 1017.4 1016.5 1014.4 1015.5 1020.0 1019.2 1017.7 1019.9 1018.4 MAX. QNH PRESSURE IN HPA 1035.0 1031.1 1039.3 1027.7 1031.9 1023.5 1021.1 1030.0 1027.7 1030.6 1028.1 1038.3 1039.3 DAY 31 1 15 9 20 2 24 9 30 5 10 22 MIN. QNH PRESSURE IN HPA 1007.2 999.9 1012.9 1005.1 1005.8 1008.9 1008.2 1006.1 1012.3 1007.5 1005.6 1008.9 999.9 DAY 8 23 19 28 16 8 29 31 9 25 27 14 MEAN QFF PRESSURE IN HPA 1022.6 1018.5 1023.2 1016.4 1017.7 1016.8 1014.7 1015.8 1020.3 1019.5 1018.0 1020.2 1018.7 MAX. QFF PRESSURE IN HPA 1035.2 1031.3 1039.5 1027.9 1032.2 1023.8 1021.4 1030.3 1028.0 1030.9 1028.4 1038.5 1039.5 DAY 31 1 15 9 20 2 24 9 30 5 10 22 MIN. QFF PRESSURE IN HPA 1007.5 1000.2 1013.2 1005.4 1006.1 1009.2 1008.5 1006.4 1012.6 1007.8 1005.9 1009.2 1000.2 DAY 8 23 19 28 16 8 29 31 9 25 27 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1024.5 1020.3 1024.7 1017.8 1018.6 1017.2 1015.5 1016.9 1021.6 1021.3 1019.6 1021.9 1020.0 MAX. QFE PRESSURE IN HPA 1037.2 1033.1 1040.4 1030.0 1032.8 1023.8 1022.8 1031.8 1030.0 1031.6 1031.0 1039.3 1040.4 DAY 30 1 15 9 20 20 24 8 19 5 10 22 MIN. QFE PRESSURE IN HPA 1009.7 1001.6 1014.4 1006.0 1007.6 1009.6 1008.6 1007.6 1014.2 1009.0 1008.3 1011.0 1001.6 DAY 11 9 8 28 16 8 29 13 24 25 27 14 MEAN QNH PRESSURE IN HPA 1023.4 1019.1 1023.6 1016.6 1017.5 1016.1 1014.4 1015.7 1020.4 1020.2 1018.5 1020.8 1018.9 MAX. QNH PRESSURE IN HPA 1036.1 1032.0 1039.3 1028.9 1031.7 1022.7 1021.7 1030.7 1028.9 1030.5 1029.9 1038.2 1039.3 DAY 30 1 15 9 20 20 24 8 19 5 10 22 MIN. QNH PRESSURE IN HPA 1008.6 1000.5 1013.3 1004.9 1006.5 1008.5 1007.5 1006.5 1013.1 1007.9 1007.2 1009.9 1000.5 DAY 11 9 8 28 16 8 29 13 24 25 27 14 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 1024.0 1019.6 1024.0 1017.1 1018.1 1016.3 1014.7 1015.9 1020.6 1019.9 1018.3 1020.7 1019.1 MAX. QFE PRESSURE IN HPA 1037.4 1031.6 1040.0 1030.2 1031.8 1023.4 1021.8 1032.4 1030.0 1030.2 1028.4 1038.1 1040.0 DAY 29 16 15 9 20 20 24 8 19 28 10 22 MIN. QFE PRESSURE IN HPA 1008.2 1001.4 1010.0 1005.2 1007.6 1008.0 1005.1 1006.2 1012.7 1007.1 1005.6 1010.2 1001.4 DAY 11 9 31 4 16 15 29 13 24 25 17 14 MEAN QNH PRESSURE IN HPA 1022.9 1018.4 1022.8 1016.0 1017.0 1015.2 1013.6 1014.7 1019.4 1018.8 1017.1 1019.6 1018.0 MAX. QNH PRESSURE IN HPA 1036.3 1030.5 1038.9 1029.1 1030.7 1022.3 1020.7 1031.3 1028.9 1029.1 1027.3 1037.0 1038.9 DAY 29 16 15 9 20 20 24 8 19 28 10 22 MIN. QNH PRESSURE IN HPA 1007.1 1000.3 1008.9 1004.1 1006.5 1006.9 1004.0 1005.1 1011.6 1006.0 1004.5 1009.1 1000.3 DAY 11 9 31 4 16 15 29 13 24 25 17 14 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 1023.0 1018.0 1022.7 1015.9 1017.1 1015.3 1013.5 1014.7 1019.2 1018.9 1017.1 1019.4 1017.9 MAX. QFE PRESSURE IN HPA 1036.2 1030.8 1038.0 1028.0 1031.0 1023.7 1020.4 1031.4 1029.0 1030.4 1027.1 1034.7 1038.0 DAY 29 16 14 9 19 20 23 8 30 16 19 22 MIN. QFE PRESSURE IN HPA 1007.0 1000.1 1005.1 1003.0 1008.1 1007.0 1004.0 1004.0 1011.0 1005.0 1002.4 1009.0 1000.1 DAY 11 9 31 3 16 15 29 13 24 25 17 14 MEAN QNH PRESSURE IN HPA 1021.9 1016.9 1021.6 1014.8 1015.9 1014.2 1012.4 1013.6 1018.1 1017.7 1016.0 1018.3 1016.8 MAX. QNH PRESSURE IN HPA 1035.1 1029.7 1036.9 1026.9 1029.9 1022.6 1019.3 1030.3 1027.9 1029.3 1026.0 1033.6 1036.9 DAY 29 16 14 9 19 20 23 8 30 16 19 22 MIN. QNH PRESSURE IN HPA 1005.9 999.0 1004.0 1001.9 1007.0 1005.9 1002.9 1002.9 1009.9 1003.9 1001.3 1007.9 999.0 DAY 11 9 31 3 16 15 29 13 24 25 17 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1023.2 1018.1 1023.0 1016.0 1016.8 1014.9 1013.1 1014.2 1018.9 1019.0 1017.2 1019.4 1017.8 MAX. QFE PRESSURE IN HPA 1036.2 1031.0 1039.4 1027.8 1031.0 1023.8 1020.6 1031.0 1030.0 1032.0 1027.4 1035.0 1039.4 DAY 29 16 14 14 19 20 23 8 30 4 10 21 MIN. QFE PRESSURE IN HPA 1007.3 1003.4 1003.8 1001.8 1008.0 1007.0 1003.4 1003.4 1011.0 1004.4 1001.2 1009.1 1001.2 DAY 11 22 31 3 15 8 29 13 8 25 17 27 MEAN QNH PRESSURE IN HPA 1022.1 1016.9 1021.9 1014.8 1015.7 1013.8 1012.0 1013.1 1017.8 1017.9 1016.0 1018.3 1016.7 MAX. QNH PRESSURE IN HPA 1035.1 1029.9 1038.3 1026.7 1029.9 1022.7 1019.5 1029.9 1028.9 1030.9 1026.3 1033.9 1038.3 DAY 29 16 14 14 19 20 23 8 30 4 10 21 MIN. QNH PRESSURE IN HPA 1006.2 1002.3 1002.7 1000.7 1006.9 1005.9 1002.3 1002.3 1009.9 1003.3 1000.1 1008.0 1000.1 DAY 11 22 31 3 15 8 29 13 8 25 17 27 MEAN QFF PRESSURE IN HPA 1022.4 1017.2 1022.1 1015.1 1016.0 1014.1 1012.3 1013.4 1018.1 1018.2 1016.3 1018.6 1017.0 MAX. QFF PRESSURE IN HPA 1035.3 1030.1 1038.5 1026.9 1030.2 1023.0 1019.8 1030.2 1029.2 1031.2 1026.5 1034.1 1038.5 DAY 29 16 14 14 19 20 23 8 30 4 10 21 MIN. QFF PRESSURE IN HPA 1006.4 1002.6 1003.0 1001.0 1007.2 1006.2 1002.6 1002.6 1010.2 1003.6 1000.4 1008.3 1000.4 DAY 11 22 31 3 15 8 29 13 8 25 17 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 11.8 10.1 11.9 17.1 19.6 25.1 27.9 27.9 22.5 18.0 15.2 12.4 18.3 MINIMUN AIR TEMPERATURE (C) 5.9 5.1 7.1 11.2 13.4 17.8 19.8 20.8 17.8 13.4 9.5 6.5 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 3 11 16 3 0 0 0 33 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS LOWEST(C) 1.0 1.0 1.0 3.0 8.0 14.0 14.0 18.0 14.0 8.0 2.0 1.0 1.0 DAY 1 8 24 5 19 1 8 25 17 18 27 23 MAXIMUM AIR TEMPERATURE (C) 15.9 14.3 15.2 20.8 23.3 28.6 31.8 31.8 25.8 21.5 19.0 16.8 22.1 DAYS WITH MAXIMUM TEMP. >=30 1 0 1 1 1 10 25 26 5 0 0 0 70 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 30.0 21.0 30.0 30.0 30.0 34.0 36.0 36.0 32.0 28.0 23.0 27.0 36.0 DAY 6 26 12 12 31 5 25 2 6 31 1 17 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 9.2 8.1 9.6 9.9 10.8 12.0 11.0 8.0 8.1 9.5 10.3 9.7 MEAN DAILY TEMP. (MDT) (C) 10.9 9.7 11.1 16.0 18.3 23.2 25.8 26.3 21.8 17.5 14.2 11.6 17.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.5 8.0 67.5 148.5 164.5 38.5 0.5 0.0 0.0 428.0 HEATING DEG. DAYS(BASE 18 0C) 222.0 232.5 214.0 72.5 37.0 0.0 0.0 0.0 0.5 30.5 112.5 199.5 1121.0 DEWPOINT (MEAN C) 7.1 7.1 8.0 12.2 14.5 18.9 20.5 22.1 19.2 15.3 12.4 8.9 13.8 MIXING RATIO (G/KG) 6.29 6.27 6.70 8.93 10.42 13.83 15.42 16.96 14.04 10.88 8.95 7.18 10.49 VAPOUR PRESSURE (HPA) 10.22 10.18 10.87 14.38 16.75 22.00 24.38 26.77 22.40 17.54 14.55 11.61 16.80 SATURATION DEF. (HPA) 4.53 2.52 3.53 5.79 6.98 10.51 14.34 11.89 5.31 3.48 3.06 3.23 6.26 RELATIVE HUMIDITY (MEAN %) 79 83 80 76 74 70 66 73 83 86 84 82 78 RELATIVE HUMIDITY (MAX. %) 90 96 95 94 94 92 91 94 96 97 97 96 94 RELATIVE HUMIDITY (MIN. %) 67 70 68 63 62 58 51 61 73 74 72 67 66 RELATIVE HUMIDITY (MEAN% 03UTC) 90 95 94 92 93 91 91 94 96 97 97 93 94 RELATIVE HUMIDITY (MEAN% 09UTC) 74 76 75 68 66 62 56 64 75 78 76 74 70 RELATIVE HUMIDITY (MEAN% 15UTC) 78 80 76 73 71 66 61 69 83 87 85 84 76 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 72.0 63.0 117.0 95.0 69.6 26.0 19.0 117.0 171.2 371.0 98.6 29.2 1248.6 DAYS WITH PRECIPITATION >=10 2 2 5 2 2 1 0 3 4 11 2 1 35 DAYS WITH PRECIPITATION >= 5 4 4 5 5 5 2 2 3 7 13 3 2 55 DAYS WITH PRECIPITATION >= 1 9 9 11 11 8 4 3 8 16 16 6 7 108 DAYS WITH PRECIPITATION 9 9 11 11 9 4 3 8 17 16 7 7 111 GREATEST DAILY PRECIPITATION 31.0 19.0 34.0 45.0 30.0 18.0 9.0 66.0 52.0 98.0 62.0 13.0 98.0 DAY 31 2 20 24 17 14 7 5 12 1 6 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 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 0 0 0 0 0 1 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 225 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.3 3.5 4.8 2.4 3.0 2.8 3.0 3.2 3.4 3.3 3.4 3.8 3.3 PREVAILING WIND PERCENT 12.9 19.3 16.1 17.3 23.9 30.7 34.8 31.6 42.0 31.0 18.0 16.8 24.5 CALMS PERCENT OF WIND 56.8 62.1 63.2 52.7 41.3 46.0 32.9 45.2 38.0 53.5 70.0 61.3 51.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 234 296 266 296 317 266 284 285 270 277 253 218 269 VECTOR WIND MAGNITUDE(KNOTS) 1.3 0.8 0.8 0.4 0.8 0.7 1.0 1.1 1.5 1.2 0.7 1.1 0.9 WIND STEADINESES (MEAN %) 59.1 57.1 40.0 20.0 42.1 43.8 41.7 57.9 71.4 80.0 70.0 61.1 50.0 WIND SPEED (MEAN KNOTS) 2.2 1.4 2.0 2.0 1.9 1.6 2.4 1.9 2.1 1.5 1.0 1.8 1.8 FASTEST WIND DIRECTION 230 340 180 240 360 180 230 270 260 270 270 180 230 FASTEST WIND SPEED (KNOTS) 25 8 18 12 8 10 12 12 10 10 12 23 25 DAY 5 17 12 12 1 22 1 5 1 8 6 17 DAYS WITH SKY CLEAR (0-2)/8 9 8 5 3 9 14 23 19 3 9 4 7 113 DAYS WITH P.CLOUDY (3-6)/8 7 3 6 9 11 8 3 4 9 3 12 9 84 DAYS WITH CLOUDY (7-8)/8 15 17 20 18 11 8 5 8 18 19 14 15 168 DAYS WITH VISIBILITY =< 2 KM 8 5 4 2 0 2 2 0 0 3 4 1 31 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1022.1 1021.0 1020.9 1017.0 1018.1 1012.2 1008.6 1008.5 1015.4 1020.7 1025.7 1017.6 1017.3 MAX. QFE PRESSURE IN HPA 1032.5 1031.2 1033.0 1031.0 1030.7 1022.5 1017.6 1017.3 1024.1 1032.1 1034.7 1033.1 1034.7 DAY-HOUR 11- 9 23- 6 2- 6 5- 3 18- 3 3- 6 7- 9 31-15 15- 6 9- 6 23- 6 30- 6 MIN. QFE PRESSURE IN HPA 1006.8 1008.8 1003.0 1003.4 1006.6 1001.2 1001.1 1000.2 1005.7 1008.7 1008.6 1003.0 1000.2 DAY-HOUR 27-12 2- 9 28-12 13- 9 25- 9 13- 9 24-15 29- 3 8-15 15-12 30-12 18-12 MEAN QNH PRESSURE IN HPA 1021.0 1019.9 1019.7 1015.8 1017.0 1011.0 1007.5 1007.3 1014.2 1019.6 1024.5 1016.4 1016.2 MAX. QNH PRESSURE IN HPA 1031.4 1030.1 1031.9 1029.9 1029.6 1021.4 1016.5 1016.2 1023.0 1031.0 1033.6 1032.0 1033.6 DAY-HOUR 11- 9 23- 6 2- 6 5- 3 18- 3 3- 6 7- 9 31-15 15- 6 9- 6 23- 6 30- 6 MIN. QNH PRESSURE IN HPA 1005.7 1007.7 1001.9 1002.3 1005.5 1000.1 1000.0 999.1 1004.6 1007.6 1007.5 1001.9 999.1 DAY-HOUR 27-12 2- 9 28-12 13- 9 25- 9 13- 9 24-15 29- 3 8-15 15-12 30-12 18-12 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 1023.1 1021.7 1021.1 1017.7 1018.9 1013.1 1009.5 1009.0 1015.8 1020.8 1026.3 1017.7 1017.9 MAX. QFE PRESSURE IN HPA 1031.8 1031.0 1031.4 1031.0 1030.7 1022.4 1017.3 1014.6 1023.3 1031.4 1034.0 1032.4 1034.0 DAY 12 23 2 5 18 3 8 31 15 9 23 30 MIN. QFE PRESSURE IN HPA 1011.5 1012.2 1004.4 1005.6 1007.8 1003.2 1003.5 1000.2 1006.8 1011.3 1011.2 1004.2 1000.2 DAY 27 3 28 13 25 13 27 29 11 15 30 18 MEAN QNH PRESSURE IN HPA 1021.9 1020.6 1020.0 1016.6 1017.8 1012.0 1008.3 1007.8 1014.7 1019.7 1025.1 1016.5 1016.8 MAX. QNH PRESSURE IN HPA 1030.7 1029.9 1030.3 1029.9 1029.6 1021.3 1016.2 1013.5 1022.2 1030.3 1032.9 1031.3 1032.9 DAY 12 23 2 5 18 3 8 31 15 9 23 30 MIN. QNH PRESSURE IN HPA 1010.4 1011.1 1003.3 1004.5 1006.7 1002.1 1002.4 999.1 1005.7 1010.2 1010.1 1003.1 999.1 DAY 27 3 28 13 25 13 27 29 11 15 30 18 MEAN QFF PRESSURE IN HPA 1022.2 1020.9 1020.3 1016.9 1018.1 1012.3 1008.7 1008.2 1015.0 1020.0 1025.4 1016.8 1017.1 MAX. QFF PRESSURE IN HPA 1030.9 1030.1 1030.5 1030.1 1029.9 1021.6 1016.5 1013.8 1022.5 1030.6 1033.2 1031.5 1033.2 DAY 12 23 2 5 18 3 8 31 15 9 23 30 MIN. QFF PRESSURE IN HPA 1010.7 1011.4 1003.6 1004.8 1007.0 1002.4 1002.7 999.4 1006.0 1010.5 1010.4 1003.4 999.4 DAY 27 3 28 13 25 13 27 29 11 15 30 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1023.3 1022.1 1021.8 1018.0 1018.9 1012.9 1009.6 1009.5 1016.3 1021.7 1026.8 1018.3 1018.3 MAX. QFE PRESSURE IN HPA 1031.4 1031.2 1033.0 1031.0 1030.3 1022.5 1017.5 1016.0 1024.1 1032.1 1034.7 1033.1 1034.7 DAY 11 23 2 5 18 3 7 31 15 9 23 30 MIN. QFE PRESSURE IN HPA 1008.4 1011.6 1004.6 1005.2 1007.0 1002.1 1003.6 1001.4 1008.7 1011.8 1011.5 1005.9 1001.4 DAY 27 2 28 13 25 13 5 29 24 15 30 18 MEAN QNH PRESSURE IN HPA 1022.1 1021.0 1020.7 1016.9 1017.7 1011.8 1008.4 1008.4 1015.2 1020.6 1025.7 1017.2 1017.1 MAX. QNH PRESSURE IN HPA 1030.3 1030.1 1031.9 1029.9 1029.2 1021.4 1016.4 1014.9 1023.0 1031.0 1033.6 1032.0 1033.6 DAY 11 23 2 5 18 3 7 31 15 9 23 30 MIN. QNH PRESSURE IN HPA 1007.3 1010.5 1003.5 1004.1 1005.9 1001.0 1002.5 1000.3 1007.6 1010.7 1010.4 1004.8 1000.3 DAY 27 2 28 13 25 13 5 29 24 15 30 18 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 1022.3 1021.0 1021.1 1017.0 1018.0 1012.4 1009.1 1009.0 1015.6 1021.1 1025.9 1017.7 1017.5 MAX. QFE PRESSURE IN HPA 1032.5 1030.4 1032.0 1030.0 1028.6 1021.6 1017.6 1017.0 1023.6 1031.7 1033.6 1032.5 1033.6 DAY 11 6 2 5 18 7 7 31 15 9 23 30 MIN. QFE PRESSURE IN HPA 1008.2 1008.8 1003.6 1003.4 1006.6 1001.2 1002.7 1001.9 1007.7 1010.2 1010.3 1005.6 1001.2 DAY 27 2 28 13 25 13 24 29 8 15 30 18 MEAN QNH PRESSURE IN HPA 1021.2 1019.9 1020.0 1015.9 1016.8 1011.2 1007.9 1007.8 1014.4 1019.9 1024.8 1016.6 1016.4 MAX. QNH PRESSURE IN HPA 1031.4 1029.3 1030.9 1028.9 1027.5 1020.5 1016.5 1015.9 1022.5 1030.6 1032.5 1031.4 1032.5 DAY 11 6 2 5 18 7 7 31 15 9 23 30 MIN. QNH PRESSURE IN HPA 1007.1 1007.7 1002.5 1002.3 1005.5 1000.1 1001.6 1000.8 1006.6 1009.1 1009.2 1004.5 1000.1 DAY 27 2 28 13 25 13 24 29 8 15 30 18 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 1020.9 1020.1 1020.1 1016.0 1017.6 1011.5 1007.8 1007.6 1014.5 1020.0 1024.7 1017.0 1016.5 MAX. QFE PRESSURE IN HPA 1032.0 1030.2 1031.2 1029.1 1030.0 1020.0 1017.3 1016.5 1021.6 1030.6 1032.5 1031.7 1032.5 DAY 11 6 2 4 17 6 7 31 15 9 23 29 MIN. QFE PRESSURE IN HPA 1006.8 1009.8 1003.0 1004.6 1010.6 1001.6 1001.7 1000.5 1005.8 1008.7 1008.6 1003.0 1000.5 DAY 27 16 28 13 13 13 24 30 8 15 30 18 MEAN QNH PRESSURE IN HPA 1019.8 1018.9 1019.0 1014.9 1016.4 1010.4 1006.6 1006.4 1013.3 1018.8 1023.6 1015.8 1015.3 MAX. QNH PRESSURE IN HPA 1030.9 1029.1 1030.1 1028.0 1028.9 1018.9 1016.2 1015.4 1020.5 1029.5 1031.4 1030.6 1031.4 DAY 11 6 2 4 17 6 7 31 15 9 23 29 MIN. QNH PRESSURE IN HPA 1005.7 1008.7 1001.9 1003.5 1009.5 1000.5 1000.6 999.4 1004.7 1007.6 1007.5 1001.9 999.4 DAY 27 16 28 13 13 13 24 30 8 15 30 18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1021.2 1020.2 1020.2 1016.1 1017.5 1011.0 1007.4 1007.4 1014.6 1020.0 1024.8 1017.2 1016.5 MAX. QFE PRESSURE IN HPA 1032.2 1030.4 1032.6 1029.5 1030.6 1019.8 1017.1 1017.3 1021.7 1030.1 1032.0 1032.2 1032.6 DAY 11 6 2 4 17 2 7 31 2 9 22 29 MIN. QFE PRESSURE IN HPA 1008.2 1009.6 1005.0 1003.8 1010.2 1003.4 1001.1 1001.4 1005.7 1009.2 1009.6 1004.4 1001.1 DAY 27 2 28 13 12 13 24 29 8 15 30 18 MEAN QNH PRESSURE IN HPA 1020.0 1019.1 1019.0 1015.0 1016.3 1009.9 1006.3 1006.2 1013.5 1018.9 1023.6 1016.1 1015.3 MAX. QNH PRESSURE IN HPA 1031.1 1029.3 1031.5 1028.4 1029.5 1018.7 1016.0 1016.2 1020.6 1029.0 1030.9 1031.1 1031.5 DAY 11 6 2 4 17 2 7 31 2 9 22 29 MIN. QNH PRESSURE IN HPA 1007.1 1008.5 1003.9 1002.7 1009.1 1002.3 1000.0 1000.3 1004.6 1008.1 1008.5 1003.3 1000.0 DAY 27 2 28 13 12 13 24 29 8 15 30 18 MEAN QFF PRESSURE IN HPA 1020.3 1019.4 1019.3 1015.3 1016.6 1010.2 1006.6 1006.6 1013.8 1019.2 1023.9 1016.4 1015.6 MAX. QFF PRESSURE IN HPA 1031.3 1029.5 1031.7 1028.6 1029.8 1019.0 1016.3 1016.5 1020.9 1029.3 1031.2 1031.3 1031.7 DAY 11 6 2 4 17 2 7 31 2 9 22 29 MIN. QFF PRESSURE IN HPA 1007.4 1008.8 1004.2 1003.0 1009.4 1002.6 1000.3 1000.6 1004.9 1008.4 1008.8 1003.6 1000.3 DAY 27 2 28 13 12 13 24 29 8 15 30 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.6 5.4 9.1 14.0 21.5 23.3 25.5 26.8 21.8 18.9 14.9 10.6 16.8 MINIMUN AIR TEMPERATURE (C) 2.6 1.6 4.7 8.0 13.2 14.5 18.5 19.5 16.5 13.4 10.8 3.4 10.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 13 1 0 0 0 19 DAYS WITH MINIMUM TEMP. <=-4 0 1 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH FREEZING MIN.<= 0 9 9 3 2 0 0 0 0 0 0 1 10 34 TEMPERATURE RECORDS LOWEST(C) -3.0 -4.0 -1.0 -1.0 9.0 5.0 15.0 15.0 11.0 7.0 0.0 -4.0 -4.0 DAY 23 4 2 1 12 6 6 29 26 23 29 25 MAXIMUM AIR TEMPERATURE (C) 15.2 8.8 12.8 18.1 26.0 27.4 29.0 30.6 25.4 22.5 18.8 16.6 21.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 6 8 15 28 4 0 0 0 62 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 26.0 18.0 20.0 31.0 31.0 32.0 31.0 33.0 32.0 26.0 24.0 24.0 33.0 DAY 15 25 17 20 26 3 3 2 5 9 1 7 DIF. BETWEEN (MAX.-MIN.) (C) 12.6 7.2 8.1 10.1 12.8 12.9 10.5 11.1 8.9 9.1 8.0 13.2 10.5 MEAN DAILY TEMP. (MDT) (C) 8.9 5.2 8.8 13.0 19.6 21.0 23.8 25.0 20.9 18.0 14.8 10.0 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.0 27.0 85.5 125.5 28.5 0.5 0.0 0.0 275.0 HEATING DEG. DAYS(BASE 18 0C) 282.5 359.0 286.5 151.5 4.5 8.0 0.0 0.0 4.0 19.0 106.0 247.0 1468.0 DEWPOINT (MEAN C) 5.1 2.6 6.1 8.6 14.9 15.6 18.4 19.6 17.9 15.7 11.6 5.2 11.8 MIXING RATIO (G/KG) 5.59 4.62 5.90 7.13 10.74 11.36 13.42 14.57 12.91 11.11 8.79 5.66 9.32 VAPOUR PRESSURE (HPA) 9.06 7.52 9.54 11.47 17.21 18.13 21.32 23.10 20.63 17.91 14.18 9.16 14.94 SATURATION DEF. (HPA) 3.54 1.70 2.23 5.25 9.19 11.40 11.88 12.72 6.06 4.30 3.38 4.54 6.35 RELATIVE HUMIDITY (MEAN %) 78 84 83 73 68 64 67 67 81 83 83 74 75 RELATIVE HUMIDITY (MAX. %) 95 94 96 91 90 89 88 90 96 96 95 93 93 RELATIVE HUMIDITY (MIN. %) 60 75 72 58 54 51 55 52 69 71 71 57 62 RELATIVE HUMIDITY (MEAN% 03UTC) 93 94 96 90 90 88 88 88 95 96 95 92 92 RELATIVE HUMIDITY (MEAN% 09UTC) 69 79 76 64 57 55 60 57 71 74 76 65 67 RELATIVE HUMIDITY (MEAN% 15UTC) 76 84 79 68 64 59 63 65 81 82 81 71 73 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 72.0 167.0 230.9 36.2 32.0 52.0 38.0 30.6 224.0 264.0 165.0 110.3 1422.0 DAYS WITH PRECIPITATION >=10 3 7 7 1 1 1 2 1 7 8 7 4 49 DAYS WITH PRECIPITATION >= 5 5 10 9 3 2 1 2 1 11 9 9 4 66 DAYS WITH PRECIPITATION >= 1 8 15 14 9 7 4 3 3 17 10 18 8 116 DAYS WITH PRECIPITATION 8 15 16 10 8 4 3 4 17 10 18 9 122 GREATEST DAILY PRECIPITATION 21.0 32.0 82.0 11.0 15.0 48.0 22.0 27.0 48.0 133.0 26.0 45.0 133.0 DAY 4 14 29 9 18 5 21 13 24 13 19 23 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 1 4 0 0 0 0 0 0 0 0 0 1 6 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 3.8 4.1 4.4 3.0 2.9 3.7 2.7 2.9 3.3 3.9 3.1 6.4 3.5 PREVAILING WIND PERCENT 20.6 45.0 36.8 31.3 36.8 40.7 38.7 38.7 31.3 17.4 37.3 16.8 32.5 CALMS PERCENT OF WIND 61.9 35.0 49.0 44.0 29.7 25.3 29.0 39.4 45.3 66.5 46.7 63.9 44.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 216 257 267 247 241 266 264 282 262 264 253 237 255 VECTOR WIND MAGNITUDE(KNOTS) 1.1 2.1 1.6 0.8 0.8 1.0 1.0 1.3 1.0 0.8 1.5 1.3 1.1 WIND STEADINESES (MEAN %) 55.0 77.8 76.2 40.0 34.8 33.3 45.5 68.4 55.6 61.5 78.9 59.1 52.4 WIND SPEED (MEAN KNOTS) 2.0 2.7 2.1 2.0 2.3 3.0 2.2 1.9 1.8 1.3 1.9 2.2 2.1 FASTEST WIND DIRECTION 180 270 270 180 180 270 180 270 360 360 180 240 240 FASTEST WIND SPEED (KNOTS) 20 18 16 28 10 15 10 12 8 12 12 30 30 DAY 15 24 29 20 19 28 31 23 4 22 22 22 DAYS WITH SKY CLEAR (0-2)/8 11 3 6 5 8 17 9 20 5 7 6 11 108 DAYS WITH P.CLOUDY (3-6)/8 12 6 7 8 13 5 9 5 7 9 7 12 100 DAYS WITH CLOUDY (7-8)/8 8 19 18 17 10 8 13 6 18 15 17 8 157 DAYS WITH VISIBILITY =< 2 KM 4 3 3 2 1 0 0 0 0 1 0 3 17 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1019.4 1021.8 1016.7 1014.7 1014.4 1012.4 1010.1 1009.3 1014.6 1021.9 1019.5 1016.8 1016.0 MAX. QFE PRESSURE IN HPA 1031.0 1037.4 1029.4 1028.2 1024.1 1023.2 1018.7 1015.1 1025.8 1033.5 1031.4 1028.6 1037.4 DAY-HOUR 26- 6 3- 6 1- 3 9- 6 3- 3 5- 9 22- 6 15- 6 24-15 15- 6 30- 6 16- 6 MIN. QFE PRESSURE IN HPA 1004.5 1004.0 1003.9 998.9 1004.2 998.8 1005.1 1003.7 1003.7 1011.6 1007.0 1000.6 998.8 DAY-HOUR 15-15 24- 3 17- 3 25- 3 27- 9 22-15 4-15 20-15 17-15 11- 3 22-15 22-12 MEAN QNH PRESSURE IN HPA 1018.3 1020.7 1015.6 1013.6 1013.2 1011.3 1009.0 1008.1 1013.4 1020.7 1018.4 1015.6 1014.8 MAX. QNH PRESSURE IN HPA 1029.9 1036.3 1028.3 1027.1 1023.0 1022.1 1017.6 1014.0 1024.7 1032.4 1030.3 1027.5 1036.3 DAY-HOUR 26- 6 3- 6 1- 3 9- 6 3- 3 5- 9 22- 6 15- 6 24-15 15- 6 30- 6 16- 6 MIN. QNH PRESSURE IN HPA 1003.4 1002.9 1002.8 997.8 1003.1 997.7 1004.0 1002.6 1002.6 1010.5 1005.9 999.5 997.7 DAY-HOUR 15-15 24- 3 17- 3 25- 3 27- 9 22-15 4-15 20-15 17-15 11- 3 22-15 22-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1020.0 1021.8 1017.0 1015.1 1014.8 1013.3 1010.9 1010.0 1015.2 1022.0 1019.8 1017.5 1016.5 MAX. QFE PRESSURE IN HPA 1030.3 1037.0 1029.4 1027.8 1024.1 1020.6 1018.1 1014.8 1025.4 1032.4 1030.0 1028.0 1037.0 DAY 26 3 1 13 3 5 22 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 1009.2 1004.0 1003.9 998.9 1005.4 1006.4 1006.7 1005.8 1005.5 1011.6 1010.3 1005.6 998.9 DAY 15 24 17 25 27 22 10 20 18 11 22 4 MEAN QNH PRESSURE IN HPA 1018.8 1020.7 1015.9 1014.0 1013.7 1012.2 1009.8 1008.8 1014.1 1020.8 1018.7 1016.4 1015.3 MAX. QNH PRESSURE IN HPA 1029.2 1035.9 1028.3 1026.7 1023.0 1019.5 1017.0 1013.7 1024.3 1031.3 1028.9 1026.9 1035.9 DAY 26 3 1 13 3 5 22 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1008.1 1002.9 1002.8 997.8 1004.3 1005.3 1005.6 1004.7 1004.4 1010.5 1009.2 1004.5 997.8 DAY 15 24 17 25 27 22 10 20 18 11 22 4 MEAN QFF PRESSURE IN HPA 1019.1 1021.0 1016.2 1014.3 1014.0 1012.5 1010.1 1009.2 1014.4 1021.1 1019.0 1016.7 1015.6 MAX. QFF PRESSURE IN HPA 1029.4 1036.1 1028.5 1026.9 1023.3 1019.8 1017.3 1014.0 1024.6 1031.6 1029.1 1027.2 1036.1 DAY 26 3 1 13 3 5 22 15 25 15 30 12 MIN. QFF PRESSURE IN HPA 1008.4 1003.2 1003.1 998.1 1004.6 1005.6 1005.9 1005.0 1004.7 1010.8 1009.5 1004.8 998.1 DAY 15 24 17 25 27 22 10 20 18 11 22 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1020.8 1022.6 1017.8 1015.6 1015.2 1013.2 1010.9 1010.2 1015.6 1022.7 1020.4 1018.0 1016.9 MAX. QFE PRESSURE IN HPA 1031.0 1037.4 1029.2 1028.2 1024.1 1022.5 1018.7 1015.1 1025.4 1033.5 1031.4 1028.6 1037.4 DAY 26 3 1 9 3 5 22 15 25 15 30 16 MIN. QFE PRESSURE IN HPA 1008.5 1004.9 1008.5 999.9 1005.5 1005.6 1006.6 1005.8 1006.9 1011.6 1009.8 1005.8 999.9 DAY 15 24 26 25 27 22 10 20 17 11 22 4 MEAN QNH PRESSURE IN HPA 1019.7 1021.5 1016.7 1014.4 1014.1 1012.1 1009.7 1009.1 1014.4 1021.6 1019.2 1016.8 1015.8 MAX. QNH PRESSURE IN HPA 1029.9 1036.3 1028.1 1027.1 1023.0 1021.4 1017.6 1014.0 1024.3 1032.4 1030.3 1027.5 1036.3 DAY 26 3 1 9 3 5 22 15 25 15 30 16 MIN. QNH PRESSURE IN HPA 1007.4 1003.8 1007.4 998.8 1004.4 1004.5 1005.5 1004.7 1005.8 1010.5 1008.7 1004.7 998.8 DAY 15 24 26 25 27 22 10 20 17 11 22 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1020.0 1022.3 1017.1 1015.1 1014.5 1012.8 1010.3 1009.4 1014.6 1022.1 1019.6 1016.7 1016.2 MAX. QFE PRESSURE IN HPA 1030.5 1037.0 1027.6 1027.8 1023.2 1023.2 1017.9 1014.2 1025.3 1032.7 1030.5 1027.6 1037.0 DAY 26 3 1 9 3 5 22 15 24 22 30 16 MIN. QFE PRESSURE IN HPA 1007.0 1005.4 1007.5 1000.1 1004.2 1003.6 1006.3 1004.8 1005.6 1011.6 1009.0 1004.3 1000.1 DAY 15 24 25 25 27 22 10 20 17 11 22 22 MEAN QNH PRESSURE IN HPA 1018.9 1021.2 1016.0 1013.9 1013.3 1011.6 1009.2 1008.3 1013.5 1021.0 1018.5 1015.6 1015.1 MAX. QNH PRESSURE IN HPA 1029.4 1035.9 1026.5 1026.7 1022.1 1022.1 1016.8 1013.1 1024.2 1031.6 1029.4 1026.5 1035.9 DAY 26 3 1 9 3 5 22 15 24 22 30 16 MIN. QNH PRESSURE IN HPA 1005.9 1004.3 1006.4 999.0 1003.1 1002.5 1005.2 1003.7 1004.5 1010.5 1007.9 1003.2 999.0 DAY 15 24 25 25 27 22 10 20 17 11 22 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.1 1021.0 1015.8 1014.0 1013.6 1011.7 1009.3 1008.5 1013.6 1021.3 1018.8 1015.6 1015.1 MAX. QFE PRESSURE IN HPA 1028.3 1035.2 1026.2 1027.6 1021.4 1021.5 1016.9 1013.2 1025.4 1033.3 1028.9 1026.4 1035.2 DAY 26 3 30 12 3 5 22 15 24 22 30 16 MIN. QFE PRESSURE IN HPA 1004.6 1006.3 1005.3 1000.0 1005.3 999.3 1005.4 1004.1 1003.9 1012.8 1007.3 1000.6 999.3 DAY 15 24 25 20 28 22 4 20 17 11 22 22 MEAN QNH PRESSURE IN HPA 1016.9 1019.8 1014.7 1012.9 1012.5 1010.5 1008.2 1007.4 1012.5 1020.1 1017.6 1014.4 1014.0 MAX. QNH PRESSURE IN HPA 1027.2 1034.1 1025.1 1026.5 1020.3 1020.4 1015.8 1012.1 1024.3 1032.2 1027.8 1025.3 1034.1 DAY 26 3 30 12 3 5 22 15 24 22 30 16 MIN. QNH PRESSURE IN HPA 1003.5 1005.2 1004.2 998.9 1004.2 998.2 1004.3 1003.0 1002.8 1011.7 1006.2 999.5 998.2 DAY 15 24 25 20 28 22 4 20 17 11 22 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1018.3 1021.5 1016.0 1013.8 1013.8 1011.3 1009.2 1008.3 1013.9 1021.4 1019.1 1016.1 1015.2 MAX. QFE PRESSURE IN HPA 1027.7 1035.3 1026.5 1027.2 1021.3 1021.0 1016.5 1013.1 1025.8 1033.4 1029.3 1025.8 1035.3 DAY 1 3 30 12 3 5 22 15 24 22 30 11 MIN. QFE PRESSURE IN HPA 1004.5 1007.4 1005.5 1000.1 1006.1 998.8 1005.1 1003.7 1003.7 1012.3 1007.0 1001.2 998.8 DAY 15 23 25 20 27 22 4 20 17 3 22 22 MEAN QNH PRESSURE IN HPA 1017.2 1020.3 1014.9 1012.7 1012.7 1010.2 1008.1 1007.1 1012.7 1020.2 1017.9 1015.0 1014.1 MAX. QNH PRESSURE IN HPA 1026.6 1034.2 1025.4 1026.1 1020.2 1019.9 1015.4 1012.0 1024.7 1032.3 1028.2 1024.7 1034.2 DAY 1 3 30 12 3 5 22 15 24 22 30 11 MIN. QNH PRESSURE IN HPA 1003.4 1006.3 1004.4 999.0 1005.0 997.7 1004.0 1002.6 1002.6 1011.2 1005.9 1000.1 997.7 DAY 15 23 25 20 27 22 4 20 17 3 22 22 MEAN QFF PRESSURE IN HPA 1017.5 1020.6 1015.2 1013.0 1013.0 1010.5 1008.4 1007.5 1013.0 1020.5 1018.2 1015.3 1014.4 MAX. QFF PRESSURE IN HPA 1026.8 1034.4 1025.6 1026.3 1020.5 1020.2 1015.7 1012.3 1025.0 1032.6 1028.4 1024.9 1034.4 DAY 1 3 30 12 3 5 22 15 24 22 30 11 MIN. QFF PRESSURE IN HPA 1003.7 1006.6 1004.7 999.3 1005.3 998.0 1004.3 1002.9 1002.9 1011.5 1006.2 1000.4 998.0 DAY 15 23 25 20 27 22 4 20 17 3 22 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.2 7.4 9.9 13.9 21.7 22.7 25.8 26.1 24.3 19.3 14.2 9.6 17.1 MINIMUN AIR TEMPERATURE (C) 2.1 2.7 4.6 8.7 14.5 16.3 18.4 20.2 17.0 14.4 10.3 5.8 11.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 3 4 14 3 0 0 0 24 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 13 9 2 0 0 0 0 0 0 0 0 0 24 TEMPERATURE RECORDS LOWEST(C) -3.0 -3.0 -1.0 3.0 9.0 11.0 12.0 17.0 13.0 5.0 4.0 1.0 -3.0 DAY 10 5 24 26 1 9 13 26 8 30 19 10 MAXIMUM AIR TEMPERATURE (C) 15.7 11.1 13.9 17.7 26.3 26.5 29.5 30.0 29.3 23.1 17.6 12.9 21.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 0 5 4 16 23 17 0 0 0 66 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 27.0 23.0 30.0 27.0 33.0 30.0 34.0 34.0 36.0 28.0 24.0 21.0 36.0 DAY 13 27 13 14 24 17 19 15 27 3 20 11 DIF. BETWEEN (MAX.-MIN.) (C) 13.6 8.4 9.3 9.0 11.8 10.2 11.1 9.8 12.3 8.7 7.3 7.1 9.8 MEAN DAILY TEMP. (MDT) (C) 8.9 6.9 9.3 13.2 20.4 21.4 23.9 25.1 23.1 18.8 13.9 9.4 16.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 21.5 38.0 93.5 127.0 66.5 9.0 0.0 0.0 355.5 HEATING DEG. DAYS(BASE 18 0C) 281.5 321.0 272.0 145.5 6.5 7.5 0.0 0.0 0.0 26.5 122.5 268.0 1451.0 DEWPOINT (MEAN C) 2.1 4.2 5.6 9.9 15.2 17.3 19.7 20.7 18.5 16.5 12.1 7.1 12.4 MIXING RATIO (G/KG) 4.58 5.19 5.70 7.57 10.97 12.51 14.63 15.52 13.48 11.81 8.76 6.28 9.75 VAPOUR PRESSURE (HPA) 7.42 8.44 9.24 12.26 17.59 19.95 23.22 24.58 21.49 18.98 14.18 10.19 15.63 SATURATION DEF. (HPA) 6.11 2.18 3.54 4.14 9.19 8.40 10.82 9.72 9.88 3.98 2.18 2.08 6.02 RELATIVE HUMIDITY (MEAN %) 66 83 78 79 69 73 71 74 73 85 88 87 77 RELATIVE HUMIDITY (MAX. %) 84 96 96 95 91 92 92 93 94 97 98 96 94 RELATIVE HUMIDITY (MIN. %) 49 68 63 67 55 61 56 61 57 73 77 75 64 RELATIVE HUMIDITY (MEAN% 03UTC) 82 93 92 95 91 92 91 93 94 97 96 95 93 RELATIVE HUMIDITY (MEAN% 09UTC) 59 74 68 71 59 64 62 64 60 75 80 80 68 RELATIVE HUMIDITY (MEAN% 15UTC) 63 84 76 76 66 72 68 72 73 87 91 87 76 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 67.5 213.2 144.7 136.0 54.0 82.0 73.0 17.0 37.0 185.4 183.6 119.0 1312.4 DAYS WITH PRECIPITATION >=10 2 6 5 7 3 3 1 0 1 5 5 5 43 DAYS WITH PRECIPITATION >= 5 4 6 7 8 4 5 3 1 3 5 9 7 62 DAYS WITH PRECIPITATION >= 1 7 10 13 13 8 6 6 6 9 13 15 13 119 DAYS WITH PRECIPITATION 8 12 14 14 8 6 6 7 9 13 15 14 126 GREATEST DAILY PRECIPITATION 24.0 95.0 68.0 21.0 15.0 43.0 54.0 8.0 15.0 60.0 41.0 26.0 95.0 DAY 26 3 22 25 31 7 12 10 13 27 17 4 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 4.6 4.7 3.8 3.4 3.6 3.1 3.6 3.1 4.0 2.9 3.4 4.2 3.7 PREVAILING WIND PERCENT 25.8 37.2 26.5 24.7 26.5 28.7 28.4 21.9 36.0 32.3 48.7 47.1 31.9 CALMS PERCENT OF WIND 45.2 51.7 54.8 58.7 54.8 50.0 56.8 54.2 46.7 54.8 41.3 36.1 50.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 201 263 247 265 252 264 271 256 272 256 260 247 247 VECTOR WIND MAGNITUDE(KNOTS) 3.6 1.8 1.1 0.9 1.2 0.7 0.9 0.6 1.4 0.9 1.8 2.2 1.3 WIND STEADINESES (MEAN %) 75.0 85.7 50.0 60.0 70.6 38.9 60.0 35.3 58.3 69.2 90.0 75.9 59.1 WIND SPEED (MEAN KNOTS) 4.8 2.1 2.2 1.5 1.7 1.8 1.5 1.7 2.4 1.3 2.0 2.9 2.2 FASTEST WIND DIRECTION 180 270 230 270 270 270 270 190 270 270 260 160 180 FASTEST WIND SPEED (KNOTS) 40 20 25 10 12 10 25 8 12 10 8 20 40 DAY 10 3 13 15 30 7 12 1 6 27 10 27 DAYS WITH SKY CLEAR (0-2)/8 14 6 4 7 6 12 17 11 15 4 4 2 102 DAYS WITH P.CLOUDY (3-6)/8 8 10 10 7 14 11 6 12 6 10 6 8 108 DAYS WITH CLOUDY (7-8)/8 9 13 17 16 11 7 8 8 9 17 20 21 156 DAYS WITH VISIBILITY =< 2 KM 1 4 4 1 0 1 0 0 0 1 1 2 15 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1014.1 1020.9 1019.3 1020.1 1016.4 1012.9 1010.8 1010.1 1013.2 1019.0 1021.5 1019.4 1016.5 MAX. QFE PRESSURE IN HPA 1027.2 1038.2 1033.4 1026.9 1024.7 1023.7 1019.4 1016.8 1021.4 1031.9 1032.8 1030.9 1038.2 DAY-HOUR 1- 6 5- 6 27- 6 19-15 23- 6 8-12 12- 9 19- 6 17- 9 30- 6 21- 6 31- 6 MIN. QFE PRESSURE IN HPA 996.5 1005.0 996.4 1009.0 1004.7 1002.6 1001.4 999.7 1005.0 1007.1 1014.0 1002.6 996.4 DAY-HOUR 10-12 20-12 13- 3 23-15 20-12 18-15 31-15 16-15 27-15 25- 3 28-12 10- 9 MEAN QNH PRESSURE IN HPA 1013.0 1019.7 1018.1 1019.0 1015.3 1011.7 1009.6 1009.0 1012.1 1017.9 1020.3 1018.2 1015.3 MAX. QNH PRESSURE IN HPA 1026.1 1037.1 1032.3 1025.8 1023.6 1022.6 1018.3 1015.7 1020.3 1030.8 1031.7 1029.8 1037.1 DAY-HOUR 1- 6 5- 6 27- 6 19-15 23- 6 8-12 12- 9 19- 6 17- 9 30- 6 21- 6 31- 6 MIN. QNH PRESSURE IN HPA 995.4 1003.9 995.3 1007.9 1003.6 1001.5 1000.3 998.6 1003.9 1006.0 1012.9 1001.5 995.3 DAY-HOUR 10-12 20-12 13- 3 23-15 20-12 18-15 31-15 16-15 27-15 25- 3 28-12 10- 9 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 1014.8 1021.4 1019.5 1020.5 1016.7 1013.7 1011.6 1010.9 1013.7 1019.2 1021.8 1019.6 1016.9 MAX. QFE PRESSURE IN HPA 1027.1 1037.8 1033.2 1025.7 1024.1 1023.3 1016.6 1016.2 1020.2 1030.8 1031.9 1030.0 1037.8 DAY 20 5 27 1 23 8 12 19 18 30 21 31 MIN. QFE PRESSURE IN HPA 1000.3 1007.7 996.4 1010.5 1008.8 1007.1 1005.2 1003.4 1007.7 1007.1 1014.8 1006.6 996.4 DAY 10 20 13 24 20 19 31 16 27 25 27 11 MEAN QNH PRESSURE IN HPA 1013.6 1020.2 1018.3 1019.3 1015.5 1012.6 1010.5 1009.8 1012.6 1018.1 1020.6 1018.4 1015.8 MAX. QNH PRESSURE IN HPA 1026.0 1036.7 1032.1 1024.6 1023.0 1022.2 1015.5 1015.1 1019.1 1029.7 1030.8 1028.9 1036.7 DAY 20 5 27 1 23 8 12 19 18 30 21 31 MIN. QNH PRESSURE IN HPA 999.2 1006.6 995.3 1009.4 1007.7 1006.0 1004.1 1002.3 1006.6 1006.0 1013.7 1005.5 995.3 DAY 10 20 13 24 20 19 31 16 27 25 27 11 MEAN QFF PRESSURE IN HPA 1013.9 1020.5 1018.6 1019.6 1015.9 1012.9 1010.8 1010.1 1012.9 1018.4 1020.9 1018.7 1016.1 MAX. QFF PRESSURE IN HPA 1026.2 1036.9 1032.3 1024.8 1023.3 1022.5 1015.8 1015.4 1019.4 1030.0 1031.1 1029.1 1036.9 DAY 20 5 27 1 23 8 12 19 18 30 21 31 MIN. QFF PRESSURE IN HPA 999.5 1006.9 995.6 1009.7 1008.0 1006.3 1004.4 1002.6 1006.9 1006.3 1014.0 1005.8 995.6 DAY 10 20 13 24 20 19 31 16 27 25 30 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1015.2 1022.0 1020.2 1021.0 1017.0 1013.7 1011.6 1011.3 1014.4 1019.9 1022.4 1020.2 1017.4 MAX. QFE PRESSURE IN HPA 1027.2 1038.2 1033.4 1026.4 1024.7 1023.5 1018.9 1016.8 1021.0 1031.9 1032.8 1030.9 1038.2 DAY 1 5 27 19 23 8 12 19 18 30 21 31 MIN. QFE PRESSURE IN HPA 998.8 1007.7 999.2 1010.6 1007.5 1006.3 1004.9 1004.2 1009.0 1007.9 1015.3 1006.4 998.8 DAY 10 20 13 23 20 19 31 16 27 25 30 27 MEAN QNH PRESSURE IN HPA 1014.0 1020.8 1019.1 1019.9 1015.8 1012.6 1010.5 1010.2 1013.2 1018.8 1021.3 1019.1 1016.3 MAX. QNH PRESSURE IN HPA 1026.1 1037.1 1032.3 1025.3 1023.6 1022.4 1017.8 1015.7 1019.9 1030.8 1031.7 1029.8 1037.1 DAY 1 5 27 19 23 8 12 19 18 30 21 31 MIN. QNH PRESSURE IN HPA 997.7 1006.6 998.1 1009.5 1006.4 1005.2 1003.8 1003.1 1007.9 1006.8 1014.2 1005.3 997.7 DAY 10 20 13 23 20 19 31 16 27 25 30 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1014.3 1021.2 1019.4 1020.3 1016.6 1013.1 1011.1 1010.3 1013.5 1019.3 1021.6 1019.1 1016.7 MAX. QFE PRESSURE IN HPA 1027.1 1038.1 1032.3 1026.7 1024.2 1023.3 1019.4 1016.2 1021.4 1031.4 1032.6 1030.6 1038.1 DAY 1 5 23 19 23 8 12 19 17 30 21 31 MIN. QFE PRESSURE IN HPA 998.5 1007.2 999.0 1010.0 1006.8 1005.1 1004.4 1002.7 1007.5 1008.8 1015.4 1002.6 998.5 DAY 10 20 13 23 20 19 31 16 27 25 27 10 MEAN QNH PRESSURE IN HPA 1013.2 1020.1 1018.3 1019.1 1015.5 1011.9 1010.0 1009.2 1012.3 1018.2 1020.5 1018.0 1015.5 MAX. QNH PRESSURE IN HPA 1026.0 1037.0 1031.2 1025.6 1023.1 1022.2 1018.3 1015.1 1020.3 1030.3 1031.5 1029.5 1037.0 DAY 1 5 23 19 23 8 12 19 17 30 21 31 MIN. QNH PRESSURE IN HPA 997.4 1006.1 997.9 1008.9 1005.7 1004.0 1003.3 1001.6 1006.4 1007.7 1014.3 1001.5 997.4 DAY 10 20 13 23 20 19 31 16 27 25 27 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1013.1 1019.7 1018.5 1019.3 1015.9 1012.1 1010.0 1009.1 1012.3 1018.3 1020.6 1018.7 1015.6 MAX. QFE PRESSURE IN HPA 1026.8 1035.8 1030.5 1026.8 1023.5 1023.7 1017.1 1015.1 1020.7 1030.4 1031.6 1029.9 1035.8 DAY 1 4 27 19 22 8 12 19 17 30 21 31 MIN. QFE PRESSURE IN HPA 996.5 1005.0 1001.2 1009.1 1004.7 1004.4 1003.0 1000.6 1005.3 1009.1 1014.0 1004.1 996.5 DAY 10 20 12 23 20 19 31 16 27 25 28 27 MEAN QNH PRESSURE IN HPA 1012.0 1018.6 1017.3 1018.2 1014.7 1011.0 1008.8 1008.0 1011.1 1017.1 1019.5 1017.6 1014.5 MAX. QNH PRESSURE IN HPA 1025.7 1034.7 1029.4 1025.7 1022.4 1022.6 1016.0 1014.0 1019.6 1029.3 1030.5 1028.8 1034.7 DAY 1 4 27 19 22 8 12 19 17 30 21 31 MIN. QNH PRESSURE IN HPA 995.4 1003.9 1000.1 1008.0 1003.6 1003.3 1001.9 999.5 1004.2 1008.0 1012.9 1003.0 995.4 DAY 10 20 12 23 20 19 31 16 27 25 28 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1013.3 1020.1 1018.8 1019.5 1015.9 1011.7 1009.6 1008.9 1012.3 1018.3 1021.0 1019.3 1015.7 MAX. QFE PRESSURE IN HPA 1026.1 1033.8 1030.1 1026.9 1023.4 1023.6 1017.3 1015.1 1020.3 1031.0 1032.2 1030.3 1033.8 DAY 1 4 27 19 22 8 12 19 18 27 21 31 MIN. QFE PRESSURE IN HPA 998.4 1007.4 1001.0 1009.0 1004.8 1002.6 1001.4 999.7 1005.0 1009.3 1014.0 1005.0 998.4 DAY 10 20 12 23 20 18 31 16 27 24 28 27 MEAN QNH PRESSURE IN HPA 1012.2 1019.0 1017.6 1018.3 1014.7 1010.6 1008.5 1007.8 1011.2 1017.2 1019.9 1018.1 1014.6 MAX. QNH PRESSURE IN HPA 1025.0 1032.7 1029.0 1025.8 1022.3 1022.5 1016.2 1014.0 1019.2 1029.9 1031.1 1029.2 1032.7 DAY 1 4 27 19 22 8 12 19 18 27 21 31 MIN. QNH PRESSURE IN HPA 997.3 1006.3 999.9 1007.9 1003.7 1001.5 1000.3 998.6 1003.9 1008.2 1012.9 1003.9 997.3 DAY 10 20 12 23 20 18 31 16 27 24 28 27 MEAN QFF PRESSURE IN HPA 1012.4 1019.3 1017.9 1018.6 1015.0 1010.9 1008.8 1008.1 1011.5 1017.5 1020.2 1018.4 1014.9 MAX. QFF PRESSURE IN HPA 1025.2 1032.9 1029.2 1026.0 1022.6 1022.8 1016.5 1014.3 1019.5 1030.2 1031.3 1029.4 1032.9 DAY 1 4 27 19 22 8 12 19 18 27 21 31 MIN. QFF PRESSURE IN HPA 997.6 1006.6 1000.2 1008.2 1004.0 1001.8 1000.6 998.9 1004.2 1008.5 1013.2 1004.2 997.6 DAY 10 20 12 23 20 18 31 16 27 24 28 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.1 2.5 6.7 12.7 19.0 24.9 24.3 25.6 21.9 17.5 11.7 11.6 15.1 MINIMUN AIR TEMPERATURE (C) 0.4 -0.6 4.2 7.9 12.8 17.2 17.9 18.6 15.6 11.8 2.3 3.2 9.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 4 4 0 0 0 0 9 DAYS WITH MINIMUM TEMP. <=-4 5 2 0 0 0 0 0 0 0 0 0 0 7 DAYS WITH FREEZING MIN.<= 0 17 22 3 0 0 0 0 0 0 0 10 9 61 TEMPERATURE RECORDS LOWEST(C) -8.0 -6.0 -1.0 3.0 9.0 11.0 13.0 16.0 10.0 2.0 -1.0 -2.0 -8.0 DAY 9 1 5 3 7 1 10 16 14 31 13 11 MAXIMUM AIR TEMPERATURE (C) 5.4 4.9 8.7 16.4 23.3 29.3 28.4 30.0 26.6 21.1 15.3 15.3 18.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 18 12 20 10 0 0 0 62 DAYS WITH MAXIMUM TEMP. <= 0 2 1 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 12.0 11.0 14.0 29.0 32.0 34.0 34.0 34.0 35.0 28.0 23.0 24.0 35.0 DAY 1 2 31 17 23 10 13 29 6 12 5 18 DIF. BETWEEN (MAX.-MIN.) (C) 5.0 5.5 4.5 8.5 10.5 12.1 10.5 11.4 11.0 9.3 13.0 12.1 9.4 MEAN DAILY TEMP. (MDT) (C) 2.9 2.1 6.5 12.2 18.0 23.2 23.1 24.3 21.1 16.5 8.8 9.2 14.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.0 75.0 68.0 102.0 38.5 3.0 0.0 0.0 289.5 HEATING DEG. DAYS(BASE 18 0C) 469.0 445.0 358.0 175.0 30.0 0.0 0.0 0.0 8.5 68.5 276.5 272.5 2103.0 DEWPOINT (MEAN C) 1.8 1.0 5.0 8.5 14.1 18.8 18.6 20.1 17.5 14.9 8.9 7.8 11.4 MIXING RATIO (G/KG) 4.37 4.06 5.44 6.96 10.12 13.85 13.54 14.88 12.66 10.69 7.15 6.66 9.20 VAPOUR PRESSURE (HPA) 7.14 6.64 8.83 11.26 16.25 21.97 21.55 23.65 20.26 17.20 11.62 10.79 14.76 SATURATION DEF. (HPA) 0.69 0.80 1.10 4.12 6.49 10.50 9.54 9.94 7.23 3.18 2.49 3.24 4.94 RELATIVE HUMIDITY (MEAN %) 92 91 90 78 75 71 73 73 79 86 84 81 81 RELATIVE HUMIDITY (MAX. %) 97 98 97 94 92 93 92 95 96 97 96 93 95 RELATIVE HUMIDITY (MIN. %) 85 83 83 65 63 58 61 60 66 76 73 67 70 RELATIVE HUMIDITY (MEAN% 03UTC) 94 97 97 94 92 93 92 95 96 96 96 90 94 RELATIVE HUMIDITY (MEAN% 09UTC) 89 88 86 69 68 62 65 64 68 81 79 75 75 RELATIVE HUMIDITY (MEAN% 15UTC) 93 90 90 76 73 66 68 69 78 87 83 81 80 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 258.0 146.0 190.4 98.0 65.8 92.0 71.4 22.9 246.0 184.3 170.0 50.2 1595.0 DAYS WITH PRECIPITATION >=10 11 5 7 5 2 2 4 0 8 7 6 2 59 DAYS WITH PRECIPITATION >= 5 16 10 11 7 5 3 6 3 8 11 9 4 93 DAYS WITH PRECIPITATION >= 1 22 15 18 13 10 4 7 7 11 18 12 10 147 DAYS WITH PRECIPITATION 22 16 19 15 12 4 8 8 11 21 12 10 158 GREATEST DAILY PRECIPITATION 34.0 27.0 38.0 24.0 20.0 51.0 27.0 6.0 53.0 36.0 53.0 12.0 53.0 DAY 3 14 23 3 27 15 31 15 12 14 9 2 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 1 0 0 1 DAYS WITH SNOW OR SLEET 9 9 2 0 0 0 0 0 0 0 0 0 20 DAYS WITH DUST 0 0 0 0 0 0 0 1 2 0 0 0 3 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 4.9 5.7 3.1 3.3 4.2 3.5 4.2 3.8 3.7 3.6 4.8 3.6 4.1 PREVAILING WIND PERCENT 65.2 62.9 55.5 41.3 36.8 25.3 24.5 35.5 43.3 23.3 11.3 7.7 36.0 CALMS PERCENT OF WIND 29.0 36.4 43.2 43.3 40.6 43.3 38.7 39.4 32.0 37.0 60.0 58.1 41.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 146 150 155 1816 VECTOR WIND DIRECTION (MEAN) 264 269 268 269 261 270 248 263 260 286 283 226 266 VECTOR WIND MAGNITUDE(KNOTS) 3.3 3.6 1.7 1.3 1.3 0.7 0.8 1.2 1.8 0.9 0.8 0.5 1.5 WIND STEADINESES (MEAN %) 94.3 100.0 100.0 65.0 48.1 31.8 36.4 50.0 64.3 33.3 44.4 20.8 60.0 WIND SPEED (MEAN KNOTS) 3.5 3.6 1.7 2.0 2.7 2.2 2.2 2.4 2.8 2.7 1.8 2.4 2.5 FASTEST WIND DIRECTION 270 270 270 160 90 260 270 230 230 350 310 180 270 FASTEST WIND SPEED (KNOTS) 15 25 16 15 12 8 12 12 10 18 11 15 25 DAY 5 10 11 17 25 7 30 8 11 29 1 18 DAYS WITH SKY CLEAR (0-2)/8 2 2 0 6 7 18 12 14 12 3 8 6 90 DAYS WITH P.CLOUDY (3-6)/8 4 4 0 6 8 8 7 8 5 8 10 12 80 DAYS WITH CLOUDY (7-8)/8 25 22 31 18 16 4 12 9 13 19 12 13 194 DAYS WITH VISIBILITY =< 2 KM 11 12 10 2 3 1 0 0 0 3 3 4 49 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 146.7 97.6 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1024.4 1025.5 1019.0 1017.9 1016.0 1009.9 1011.6 1012.8 1016.5 1018.8 1023.8 1019.2 1017.9 MAX. QFE PRESSURE IN HPA 1039.8 1037.3 1033.1 1029.7 1024.3 1019.3 1018.1 1020.8 1029.1 1032.0 1032.7 1028.6 1039.8 DAY-HOUR 6- 6 10- 6 12- 6 4- 6 28- 6 25-12 2- 9 31- 6 13- 6 26- 9 10- 6 6-15 MIN. QFE PRESSURE IN HPA 1010.0 1009.6 1001.6 994.5 1001.8 998.6 999.0 1003.4 1005.1 1004.1 1010.8 1005.4 994.5 DAY-HOUR 19-12 13-12 19-12 17-12 14-15 24- 3 14- 3 3-12 7- 9 29- 3 7-12 31-12 MEAN QNH PRESSURE IN HPA 1023.2 1024.3 1017.8 1016.8 1014.8 1008.8 1010.5 1011.6 1015.3 1017.7 1022.7 1018.0 1016.8 MAX. QNH PRESSURE IN HPA 1038.7 1036.2 1032.0 1028.6 1023.2 1018.2 1017.0 1019.7 1028.0 1030.9 1031.6 1027.5 1038.7 DAY-HOUR 6- 6 10- 6 12- 6 4- 6 28- 6 25-12 2- 9 31- 6 13- 6 26- 9 10- 6 6-15 MIN. QNH PRESSURE IN HPA 1008.9 1008.5 1000.5 993.4 1000.7 997.5 997.9 1002.3 1004.0 1003.0 1009.7 1004.3 993.4 DAY-HOUR 19-12 13-12 19-12 17-12 14-15 24- 3 14- 3 3-12 7- 9 29- 3 7-12 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 1024.5 1025.5 1019.4 1018.0 1016.0 1010.2 1012.2 1013.3 1017.0 1019.1 1023.8 1018.9 1018.2 MAX. QFE PRESSURE IN HPA 1039.1 1036.8 1032.4 1028.4 1024.2 1019.1 1017.2 1020.1 1027.6 1031.0 1031.7 1028.2 1039.1 DAY 6 11 12 4 21 1 26 31 13 26 10 7 MIN. QFE PRESSURE IN HPA 1011.0 1011.1 1006.8 999.8 1004.6 998.6 999.0 1006.7 1006.5 1004.1 1010.9 1005.7 998.6 DAY 19 13 19 17 14 24 14 4 7 29 7 31 MEAN QNH PRESSURE IN HPA 1023.4 1024.4 1018.2 1016.9 1014.9 1009.1 1011.1 1012.2 1015.8 1018.0 1022.7 1017.8 1017.0 MAX. QNH PRESSURE IN HPA 1038.0 1035.7 1031.3 1027.3 1023.1 1018.0 1016.1 1019.0 1026.5 1029.9 1030.6 1027.1 1038.0 DAY 6 11 12 4 21 1 26 31 13 26 10 7 MIN. QNH PRESSURE IN HPA 1009.9 1010.0 1005.7 998.7 1003.5 997.5 997.9 1005.6 1005.4 1003.0 1009.8 1004.6 997.5 DAY 19 13 19 17 14 24 14 4 7 29 7 31 MEAN QFF PRESSURE IN HPA 1023.7 1024.7 1018.5 1017.2 1015.2 1009.4 1011.4 1012.5 1016.1 1018.1 1023.0 1018.1 1017.3 MAX. QFF PRESSURE IN HPA 1038.2 1035.9 1031.5 1027.5 1023.4 1018.3 1016.4 1019.3 1026.8 1030.2 1030.8 1027.3 1038.2 DAY 6 11 12 4 21 1 26 31 13 26 17 7 MIN. QFF PRESSURE IN HPA 1010.2 1010.2 1006.0 999.0 1003.8 997.8 998.2 1005.9 1005.7 1003.3 1010.1 1004.9 997.8 DAY 19 13 20 17 14 24 14 4 7 29 7 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1025.2 1026.2 1019.9 1018.8 1016.4 1010.8 1012.5 1013.8 1017.4 1019.7 1024.6 1019.9 1018.8 MAX. QFE PRESSURE IN HPA 1039.8 1037.3 1033.1 1029.7 1024.3 1019.0 1017.6 1020.8 1029.1 1031.5 1032.7 1028.3 1039.8 DAY 6 10 12 4 28 1 2 31 13 26 10 7 MIN. QFE PRESSURE IN HPA 1010.8 1010.8 1006.7 999.1 1005.6 1002.9 1000.6 1006.6 1005.8 1005.0 1011.6 1006.9 999.1 DAY 19 13 19 17 3 23 14 4 7 29 7 31 MEAN QNH PRESSURE IN HPA 1024.1 1025.1 1018.8 1017.7 1015.3 1009.7 1011.4 1012.7 1016.3 1018.5 1023.5 1018.8 1017.7 MAX. QNH PRESSURE IN HPA 1038.7 1036.2 1032.0 1028.6 1023.2 1017.9 1016.5 1019.7 1028.0 1030.4 1031.6 1027.2 1038.7 DAY 6 10 12 4 28 1 2 31 13 26 10 7 MIN. QNH PRESSURE IN HPA 1009.7 1009.7 1005.6 998.0 1004.5 1001.8 999.5 1005.5 1004.7 1003.9 1010.5 1005.8 998.0 DAY 19 13 19 17 3 23 14 4 7 29 7 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 1024.7 1026.0 1019.3 1018.3 1016.2 1010.3 1011.9 1013.1 1016.6 1019.1 1024.1 1019.7 1018.3 MAX. QFE PRESSURE IN HPA 1038.9 1037.0 1032.0 1028.7 1023.6 1019.0 1018.1 1019.0 1028.6 1032.0 1032.4 1027.5 1038.9 DAY 6 10 12 4 28 1 2 31 13 26 12 7 MIN. QFE PRESSURE IN HPA 1010.3 1010.0 1003.3 996.6 1005.2 1001.8 1003.2 1005.0 1005.1 1005.7 1011.4 1005.7 996.6 DAY 19 13 19 17 14 23 13 3 7 29 7 31 MEAN QNH PRESSURE IN HPA 1023.6 1024.9 1018.1 1017.1 1015.0 1009.1 1010.8 1012.0 1015.4 1017.9 1023.0 1018.6 1017.1 MAX. QNH PRESSURE IN HPA 1037.8 1035.9 1030.9 1027.6 1022.5 1017.9 1017.0 1017.9 1027.5 1030.9 1031.3 1026.4 1037.8 DAY 6 10 12 4 28 1 2 31 13 26 12 7 MIN. QNH PRESSURE IN HPA 1009.2 1008.9 1002.2 995.5 1004.1 1000.7 1002.1 1003.9 1004.0 1004.6 1010.3 1004.6 995.5 DAY 19 13 19 17 14 23 13 3 7 29 7 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 1023.6 1024.7 1018.1 1017.0 1015.6 1009.4 1010.9 1012.0 1015.6 1017.9 1023.1 1018.5 1017.2 MAX. QFE PRESSURE IN HPA 1037.6 1036.6 1031.1 1026.4 1023.6 1019.3 1018.1 1018.7 1027.4 1030.9 1032.1 1026.7 1037.6 DAY 4 10 23 4 20 25 2 31 13 26 17 6 MIN. QFE PRESSURE IN HPA 1010.0 1009.6 1001.6 994.5 1003.3 999.9 1000.6 1003.4 1006.4 1008.7 1010.8 1005.4 994.5 DAY 19 13 19 17 14 23 13 3 19 24 7 31 MEAN QNH PRESSURE IN HPA 1022.5 1023.5 1016.9 1015.9 1014.5 1008.3 1009.8 1010.8 1014.5 1016.8 1022.0 1017.3 1016.1 MAX. QNH PRESSURE IN HPA 1036.5 1035.5 1030.0 1025.3 1022.5 1018.2 1017.0 1017.6 1026.3 1029.8 1031.0 1025.6 1036.5 DAY 4 10 23 4 20 25 2 31 13 26 17 6 MIN. QNH PRESSURE IN HPA 1008.9 1008.5 1000.5 993.4 1002.2 998.8 999.5 1002.3 1005.3 1007.6 1009.7 1004.3 993.4 DAY 19 13 19 17 14 23 13 3 19 24 7 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1023.9 1025.0 1018.4 1017.6 1015.7 1009.0 1010.6 1011.8 1015.8 1018.2 1023.3 1018.9 1017.3 MAX. QFE PRESSURE IN HPA 1037.5 1037.1 1031.3 1027.0 1023.9 1019.0 1018.1 1019.0 1027.4 1030.7 1032.1 1028.6 1037.5 DAY 5 10 23 21 27 25 2 30 13 26 17 6 MIN. QFE PRESSURE IN HPA 1010.8 1011.4 1001.7 998.5 1001.8 999.7 1000.6 1003.4 1006.5 1010.5 1011.8 1007.2 998.5 DAY 19 13 19 17 14 23 13 3 19 19 7 31 MEAN QNH PRESSURE IN HPA 1022.8 1023.9 1017.2 1016.5 1014.5 1007.9 1009.4 1010.6 1014.7 1017.1 1022.2 1017.8 1016.2 MAX. QNH PRESSURE IN HPA 1036.4 1036.0 1030.2 1025.9 1022.8 1017.9 1017.0 1017.9 1026.3 1029.6 1031.0 1027.5 1036.4 DAY 5 10 23 21 27 25 2 30 13 26 17 6 MIN. QNH PRESSURE IN HPA 1009.7 1010.3 1000.6 997.4 1000.7 998.6 999.5 1002.3 1005.4 1009.4 1010.7 1006.1 997.4 DAY 19 13 19 17 14 23 13 3 19 19 7 31 MEAN QFF PRESSURE IN HPA 1023.0 1024.2 1017.5 1016.8 1014.8 1008.2 1009.8 1011.0 1015.0 1017.4 1022.4 1018.1 1016.5 MAX. QFF PRESSURE IN HPA 1036.6 1036.2 1030.4 1026.2 1023.1 1018.2 1017.3 1018.2 1026.6 1029.9 1031.2 1027.7 1036.6 DAY 5 10 23 21 27 25 2 30 13 26 17 6 MIN. QFF PRESSURE IN HPA 1009.9 1010.5 1000.9 997.7 1001.0 998.9 999.8 1002.6 1005.7 1009.7 1011.0 1006.4 997.7 DAY 19 13 19 17 14 23 13 3 19 19 7 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 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.0 10.9 11.3 15.8 21.4 23.7 26.5 25.3 22.1 17.6 14.9 9.0 17.2 MINIMUN AIR TEMPERATURE (C) 0.8 2.5 3.0 7.1 11.6 14.3 16.3 17.3 13.3 9.6 6.3 1.7 8.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 2 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH FREEZING MIN.<= 0 15 9 8 0 0 0 0 0 0 0 0 12 44 TEMPERATURE RECORDS LOWEST(C) -6.0 -2.0 -2.0 3.0 7.0 9.0 13.0 13.0 8.0 3.0 2.0 -3.0 -6.0 DAY 29 8 6 2 8 11 2 31 13 25 1 16 MAXIMUM AIR TEMPERATURE (C) 11.0 15.1 15.6 20.1 25.3 27.3 30.5 28.5 25.8 21.2 19.2 12.3 21.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 0 2 4 23 17 3 0 0 0 51 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.0 27.0 31.0 26.0 32.0 32.0 34.0 33.0 31.0 27.0 28.0 19.0 34.0 DAY 30 18 30 19 6 30 19 13 7 5 3 6 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 12.6 12.6 13.0 13.7 13.0 14.2 11.2 12.5 11.6 12.9 10.6 12.4 MEAN DAILY TEMP. (MDT) (C) 5.9 8.8 9.3 13.6 18.4 20.8 23.4 22.9 19.5 15.4 12.7 7.0 14.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.5 0.0 1.5 19.0 75.5 68.5 9.5 0.5 0.0 0.0 175.0 HEATING DEG. DAYS(BASE 18 0C) 375.0 257.0 273.5 133.5 21.0 5.0 0.0 2.5 9.5 85.0 158.0 341.0 1661.0 DEWPOINT (MEAN C) 5.2 7.3 7.4 10.6 15.5 16.5 19.2 21.3 17.7 14.4 12.4 6.9 12.9 MIXING RATIO (G/KG) 5.57 6.48 6.49 8.03 11.14 11.89 14.13 16.08 12.76 10.31 9.00 6.24 9.84 VAPOUR PRESSURE (HPA) 9.06 10.49 10.52 12.98 17.81 19.00 22.43 25.44 20.40 16.61 14.56 10.15 15.79 SATURATION DEF. (HPA) 1.91 3.12 3.91 5.44 8.19 10.96 12.93 7.39 6.85 3.95 2.72 1.65 5.75 RELATIVE HUMIDITY (MEAN %) 85 82 80 74 71 66 67 80 77 83 87 88 78 RELATIVE HUMIDITY (MAX. %) 94 95 93 93 92 87 90 96 95 96 97 98 94 RELATIVE HUMIDITY (MIN. %) 75 63 67 58 56 53 53 68 65 69 72 77 65 RELATIVE HUMIDITY (MEAN% 03UTC) 93 92 90 92 91 87 89 96 95 96 96 97 93 RELATIVE HUMIDITY (MEAN% 09UTC) 83 80 74 65 60 57 57 75 69 75 82 82 72 RELATIVE HUMIDITY (MEAN% 15UTC) 82 82 79 69 69 60 61 75 73 83 87 88 76 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 219.0 24.6 100.0 31.6 42.0 56.0 52.0 112.0 75.4 123.0 96.0 375.0 1306.6 DAYS WITH PRECIPITATION >=10 7 0 5 1 2 1 2 5 3 4 4 8 42 DAYS WITH PRECIPITATION >= 5 10 1 8 2 3 1 3 7 4 9 6 10 64 DAYS WITH PRECIPITATION >= 1 13 7 14 9 9 2 4 10 6 12 9 13 108 DAYS WITH PRECIPITATION 13 9 14 9 9 2 5 10 8 12 9 13 113 GREATEST DAILY PRECIPITATION 56.0 7.0 19.0 16.0 10.0 55.0 23.4 24.0 33.0 29.0 30.0 120.0 120.0 DAY 28 24 24 21 7 10 24 31 12 2 13 14 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 0 0 0 0 0 0 0 0 0 1 2 0 3 WIND DIRECTION (PREVAILING) 270 270 270 360 45 45 45 270 45 315 270 270 270 PREVAILING WIND SPEED(KNOTS) 6.8 6.8 5.6 5.7 6.4 6.6 6.8 5.0 4.7 7.7 3.5 7.4 5.9 PREVAILING WIND PERCENT 20.6 9.3 9.0 8.0 7.1 12.7 14.8 13.5 6.0 11.0 8.0 18.1 8.5 CALMS PERCENT OF WIND 54.2 59.3 63.2 66.7 63.2 66.0 67.1 61.3 78.0 66.5 76.7 69.7 66.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 281 244 313 48 22 36 20 315 57 312 347 285 333 VECTOR WIND MAGNITUDE(KNOTS) 1.8 0.5 0.5 0.8 1.0 1.2 1.2 0.5 0.4 1.5 0.5 1.6 0.6 WIND STEADINESES (MEAN %) 62.1 16.1 20.0 42.1 45.5 57.1 57.1 26.3 40.0 75.0 45.5 76.2 28.6 WIND SPEED (MEAN KNOTS) 2.9 3.1 2.5 1.9 2.2 2.1 2.1 1.9 1.0 2.0 1.1 2.1 2.1 FASTEST WIND DIRECTION 310 210 180 40 340 40 50 280 210 300 360 260 210 FASTEST WIND SPEED (KNOTS) 18 20 18 15 14 14 10 10 8 16 17 15 20 DAY 11 13 18 11 7 18 3 1 12 17 8 9 DAYS WITH SKY CLEAR (0-2)/8 6 2 4 3 11 17 17 8 8 6 6 5 93 DAYS WITH P.CLOUDY (3-6)/8 3 10 3 9 8 7 8 9 10 6 13 9 95 DAYS WITH CLOUDY (7-8)/8 22 16 24 18 12 6 6 14 12 19 11 17 177 DAYS WITH VISIBILITY =< 2 KM 5 5 2 9 1 0 0 0 0 1 2 1 26 DURATION OF SUNSHINE HOURS 66.6 76.0 48.9 ****** 196.4 215.3 226.0 124.5 124.8 101.8 104.0 73.3 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1021.7 1018.9 1019.9 1019.3 1013.0 1013.6 1010.1 1010.0 1015.7 1020.0 1021.0 1022.9 1017.2 MAX. QFE PRESSURE IN HPA 1031.5 1029.0 1031.2 1033.6 1023.5 1026.5 1016.4 1022.0 1026.3 1031.5 1035.8 1030.9 1035.8 DAY-HOUR 2- 6 16- 6 5- 6 22- 6 9- 9 11- 3 31- 9 29-15 18- 6 31- 6 14- 9 27- 6 MIN. QFE PRESSURE IN HPA 1009.3 1002.4 1001.9 996.8 1002.5 1004.5 1004.3 997.5 1006.4 1005.6 1007.8 1010.4 996.8 DAY-HOUR 30- 3 18-15 18-15 19-15 15-12 20-12 13-15 27- 6 6-12 6- 3 3-15 11- 3 MEAN QNH PRESSURE IN HPA 1020.6 1017.7 1018.8 1018.2 1011.8 1012.5 1009.0 1008.8 1014.6 1018.8 1019.9 1021.7 1016.0 MAX. QNH PRESSURE IN HPA 1030.4 1027.9 1030.1 1032.5 1022.4 1025.4 1015.3 1020.9 1025.2 1030.4 1034.7 1029.8 1034.7 DAY-HOUR 2- 6 16- 6 5- 6 22- 6 9- 9 11- 3 31- 9 29-15 18- 6 31- 6 14- 9 27- 6 MIN. QNH PRESSURE IN HPA 1008.2 1001.3 1000.8 995.7 1001.4 1003.4 1003.2 996.4 1005.3 1004.5 1006.7 1009.3 995.7 DAY-HOUR 30- 3 18-15 18-15 19-15 15-12 20-12 13-15 27- 6 6-12 6- 3 3-15 11- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1021.5 1019.2 1020.1 1019.5 1013.5 1014.3 1010.4 1010.6 1016.3 1020.1 1021.1 1022.9 1017.4 MAX. QFE PRESSURE IN HPA 1029.8 1028.5 1030.3 1033.2 1022.9 1026.5 1014.9 1021.1 1025.0 1029.0 1034.2 1029.7 1034.2 DAY 2 16 5 22 9 11 23 30 18 31 14 27 MIN. QFE PRESSURE IN HPA 1009.3 1008.3 1002.6 1000.9 1005.3 1005.8 1006.1 997.9 1009.4 1005.6 1014.0 1010.4 997.9 DAY 30 18 19 19 26 20 20 27 6 6 12 11 MEAN QNH PRESSURE IN HPA 1020.4 1018.0 1019.0 1018.3 1012.4 1013.1 1009.3 1009.4 1015.1 1018.9 1020.0 1021.8 1016.3 MAX. QNH PRESSURE IN HPA 1028.7 1027.4 1029.2 1032.1 1021.8 1025.4 1013.8 1020.0 1023.9 1027.9 1033.1 1028.6 1033.1 DAY 2 16 5 22 9 11 23 30 18 31 14 27 MIN. QNH PRESSURE IN HPA 1008.2 1007.2 1001.5 999.8 1004.2 1004.7 1005.0 996.8 1008.3 1004.5 1012.9 1009.3 996.8 DAY 30 18 19 19 26 20 20 27 6 6 12 11 MEAN QFF PRESSURE IN HPA 1020.7 1018.3 1019.2 1018.6 1012.7 1013.5 1009.6 1009.8 1015.5 1019.2 1020.3 1022.0 1016.6 MAX. QFF PRESSURE IN HPA 1028.9 1027.6 1029.4 1032.3 1022.1 1025.7 1014.1 1020.3 1024.2 1028.2 1033.3 1028.8 1033.3 DAY 2 16 5 22 9 11 23 30 18 31 14 27 MIN. QFF PRESSURE IN HPA 1008.5 1007.5 1001.8 1000.1 1004.5 1005.0 1005.3 997.1 1008.6 1004.8 1013.2 1009.6 997.1 DAY 30 18 19 19 26 20 20 27 6 6 12 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1022.5 1019.6 1020.6 1020.2 1013.8 1014.6 1011.0 1010.9 1016.7 1020.9 1022.0 1023.7 1018.0 MAX. QFE PRESSURE IN HPA 1031.5 1029.0 1031.2 1033.6 1023.4 1026.5 1016.3 1020.9 1026.3 1031.5 1035.6 1030.9 1035.6 DAY 2 16 5 22 9 11 23 30 18 31 14 27 MIN. QFE PRESSURE IN HPA 1011.0 1006.7 1003.6 1000.3 1003.9 1005.6 1006.0 997.5 1009.0 1007.1 1014.4 1012.3 997.5 DAY 30 18 19 19 15 20 10 27 6 6 3 11 MEAN QNH PRESSURE IN HPA 1021.4 1018.4 1019.5 1019.1 1012.7 1013.4 1009.8 1009.7 1015.6 1019.8 1020.9 1022.6 1016.9 MAX. QNH PRESSURE IN HPA 1030.4 1027.9 1030.1 1032.5 1022.3 1025.4 1015.2 1019.8 1025.2 1030.4 1034.5 1029.8 1034.5 DAY 2 16 5 22 9 11 23 30 18 31 14 27 MIN. QNH PRESSURE IN HPA 1009.9 1005.6 1002.5 999.2 1002.8 1004.5 1004.9 996.4 1007.9 1006.0 1013.3 1011.2 996.4 DAY 30 18 19 19 15 20 10 27 6 6 3 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1022.3 1019.2 1020.4 1019.9 1013.3 1014.0 1010.6 1010.3 1016.1 1020.4 1021.6 1023.5 1017.6 MAX. QFE PRESSURE IN HPA 1030.7 1028.8 1030.4 1032.9 1023.5 1026.3 1016.4 1019.4 1026.1 1031.3 1035.8 1030.7 1035.8 DAY 2 16 5 22 9 11 31 29 18 31 14 26 MIN. QFE PRESSURE IN HPA 1012.5 1005.0 1002.9 998.2 1002.7 1005.3 1005.8 997.8 1008.0 1006.7 1012.2 1013.2 997.8 DAY 30 18 19 19 15 20 10 27 6 14 3 11 MEAN QNH PRESSURE IN HPA 1021.2 1018.1 1019.3 1018.8 1012.1 1012.9 1009.5 1009.2 1015.0 1019.2 1020.5 1022.3 1016.5 MAX. QNH PRESSURE IN HPA 1029.6 1027.7 1029.3 1031.8 1022.4 1025.2 1015.3 1018.3 1025.0 1030.2 1034.7 1029.6 1034.7 DAY 2 16 5 22 9 11 31 29 18 31 14 26 MIN. QNH PRESSURE IN HPA 1011.4 1003.9 1001.8 997.1 1001.6 1004.2 1004.7 996.7 1006.9 1005.6 1011.1 1012.1 996.7 DAY 30 18 19 19 15 20 10 27 6 14 3 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1021.0 1018.2 1019.4 1018.8 1012.3 1012.9 1009.7 1009.2 1014.8 1019.2 1020.0 1021.9 1016.4 MAX. QFE PRESSURE IN HPA 1029.3 1026.8 1029.5 1031.3 1021.9 1024.8 1015.5 1021.3 1024.6 1029.9 1033.4 1029.6 1033.4 DAY 2 16 9 22 9 11 31 29 18 31 14 26 MIN. QFE PRESSURE IN HPA 1010.7 1002.7 1002.3 997.8 1002.5 1004.5 1004.5 999.3 1006.4 1006.9 1009.1 1010.8 997.8 DAY 22 18 18 19 15 20 10 27 6 14 3 10 MEAN QNH PRESSURE IN HPA 1019.9 1017.0 1018.2 1017.6 1011.2 1011.8 1008.5 1008.1 1013.7 1018.0 1018.9 1020.8 1015.3 MAX. QNH PRESSURE IN HPA 1028.2 1025.7 1028.4 1030.2 1020.8 1023.7 1014.4 1020.2 1023.5 1028.8 1032.3 1028.5 1032.3 DAY 2 16 9 22 9 11 31 29 18 31 14 26 MIN. QNH PRESSURE IN HPA 1009.6 1001.6 1001.2 996.7 1001.4 1003.4 1003.4 998.2 1005.3 1005.8 1008.0 1009.7 996.7 DAY 22 18 18 19 15 20 10 27 6 14 3 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1021.4 1018.3 1019.3 1018.3 1012.1 1012.4 1009.2 1008.9 1014.7 1019.4 1020.3 1022.4 1016.4 MAX. QFE PRESSURE IN HPA 1029.4 1026.2 1029.0 1030.8 1021.4 1025.1 1015.5 1022.0 1025.3 1028.2 1033.4 1029.9 1033.4 DAY 2 15 9 21 8 10 31 29 18 31 14 26 MIN. QFE PRESSURE IN HPA 1011.1 1002.4 1001.9 996.8 1003.4 1004.5 1004.3 999.9 1006.7 1007.4 1007.8 1011.0 996.8 DAY 22 18 18 19 26 20 13 26 6 5 3 10 MEAN QNH PRESSURE IN HPA 1020.3 1017.2 1018.2 1017.2 1010.9 1011.3 1008.1 1007.7 1013.6 1018.2 1019.2 1021.3 1015.3 MAX. QNH PRESSURE IN HPA 1028.3 1025.1 1027.9 1029.7 1020.3 1024.0 1014.4 1020.9 1024.2 1027.1 1032.3 1028.8 1032.3 DAY 2 15 9 21 8 10 31 29 18 31 14 26 MIN. QNH PRESSURE IN HPA 1010.0 1001.3 1000.8 995.7 1002.3 1003.4 1003.2 998.8 1005.6 1006.3 1006.7 1009.9 995.7 DAY 22 18 18 19 26 20 13 26 6 5 3 10 MEAN QFF PRESSURE IN HPA 1020.6 1017.4 1018.5 1017.5 1011.3 1011.6 1008.4 1008.1 1013.9 1018.5 1019.5 1021.5 1015.6 MAX. QFF PRESSURE IN HPA 1028.5 1025.4 1028.1 1029.9 1020.6 1024.3 1014.7 1021.2 1024.5 1027.4 1032.5 1029.0 1032.5 DAY 2 16 9 21 8 10 31 29 18 31 14 26 MIN. QFF PRESSURE IN HPA 1010.3 1001.6 1001.1 996.0 1002.6 1003.7 1003.5 999.1 1005.9 1006.6 1007.0 1010.2 996.0 DAY 22 18 18 19 26 20 13 26 6 5 3 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.4 7.5 10.8 13.8 21.4 24.3 28.0 26.5 25.5 18.8 15.1 9.8 17.3 MINIMUN AIR TEMPERATURE (C) -1.4 -0.5 3.1 5.5 12.5 14.2 17.5 16.7 14.3 9.8 5.8 0.8 8.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 8 6 0 0 0 0 0 0 0 0 0 4 18 DAYS WITH FREEZING MIN.<= 0 24 16 5 2 0 0 0 0 0 0 0 15 62 TEMPERATURE RECORDS LOWEST(C) -6.0 -9.0 -1.0 -1.0 9.0 9.0 15.0 15.0 10.0 6.0 1.0 -5.0 -9.0 DAY 25 15 22 3 1 5 1 8 21 10 20 21 MAXIMUM AIR TEMPERATURE (C) 9.9 12.6 15.4 17.8 25.0 28.0 32.1 30.3 30.0 23.1 19.0 14.4 21.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 1 1 8 26 20 23 1 0 0 81 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 24.0 30.0 30.0 30.0 33.0 37.0 34.0 33.0 32.0 25.0 26.0 37.0 DAY 1 27 11 16 4 13 12 17 9 7 13 12 DIF. BETWEEN (MAX.-MIN.) (C) 11.3 13.1 12.3 12.3 12.5 13.8 14.6 13.6 15.7 13.3 13.2 13.6 13.3 MEAN DAILY TEMP. (MDT) (C) 4.3 6.0 9.2 11.6 18.8 21.1 24.8 23.5 22.1 16.5 12.4 7.6 14.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 4.0 23.0 119.0 77.5 39.0 1.5 0.0 0.0 264.0 HEATING DEG. DAYS(BASE 18 0C) 425.5 335.0 271.5 193.5 13.5 1.0 0.0 0.0 0.0 60.0 168.5 323.0 1791.5 DEWPOINT (MEAN C) 4.0 4.1 7.7 9.6 15.8 16.5 19.8 19.3 19.1 14.7 11.7 6.0 12.3 MIXING RATIO (G/KG) 5.06 5.20 6.57 7.59 11.31 11.97 14.83 14.17 13.94 10.45 8.61 5.96 9.64 VAPOUR PRESSURE (HPA) 8.29 8.42 10.64 12.25 18.12 19.07 23.48 22.52 22.27 16.86 13.92 9.66 15.46 SATURATION DEF. (HPA) 1.71 2.48 2.78 4.27 7.87 11.79 14.99 12.82 11.20 5.49 3.60 3.25 6.85 RELATIVE HUMIDITY (MEAN %) 86 82 83 79 72 65 64 67 70 79 82 81 76 RELATIVE HUMIDITY (MAX. %) 98 97 97 94 93 89 91 89 95 95 97 93 94 RELATIVE HUMIDITY (MIN. %) 75 65 69 65 57 49 47 53 55 65 67 69 61 RELATIVE HUMIDITY (MEAN% 03UTC) 97 95 96 92 93 89 90 89 94 94 96 91 93 RELATIVE HUMIDITY (MEAN% 09UTC) 81 78 75 74 63 55 55 57 61 69 74 78 68 RELATIVE HUMIDITY (MEAN% 15UTC) 83 76 78 78 65 57 55 61 62 78 82 79 71 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 166.4 95.0 47.4 122.0 10.0 16.0 0.0 26.0 17.0 152.0 80.0 226.0 957.8 DAYS WITH PRECIPITATION >=10 7 4 2 4 0 1 0 1 1 4 2 8 34 DAYS WITH PRECIPITATION >= 5 9 7 3 7 0 1 0 3 1 6 2 11 50 DAYS WITH PRECIPITATION >= 1 12 11 7 16 6 1 0 5 2 13 5 13 91 DAYS WITH PRECIPITATION 12 11 8 16 6 1 0 5 2 13 5 13 92 GREATEST DAILY PRECIPITATION 38.0 30.0 16.0 35.0 3.0 16.0 0.0 10.0 16.0 45.0 38.0 54.0 54.0 DAY 14 13 15 2 18 19 ** 1 30 3 10 31 DAY WITH THUNDER STORM 0 1 0 0 0 0 0 0 1 0 0 0 2 DAYS WITH SNOW OR SLEET 3 3 0 0 0 0 0 0 0 0 0 0 6 DAYS WITH DUST 1 0 1 0 2 1 0 0 0 0 0 0 5 WIND DIRECTION (PREVAILING) 270 315 90 45 45 45 45 45 45 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 6.0 6.8 6.5 5.5 5.5 6.1 6.2 6.9 6.4 5.5 6.2 7.5 5.8 PREVAILING WIND PERCENT 20.6 12.9 9.7 14.0 13.5 12.0 9.0 8.4 15.3 15.5 7.3 17.4 8.7 CALMS PERCENT OF WIND 61.9 58.6 62.6 48.0 49.7 48.7 71.0 61.3 60.7 56.1 66.0 56.8 58.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 298 263 38 16 9 356 14 10 25 329 273 254 334 VECTOR WIND MAGNITUDE(KNOTS) 1.6 1.0 0.7 0.7 1.4 1.6 0.9 1.0 1.4 1.1 0.6 2.3 0.8 WIND STEADINESES (MEAN %) 66.7 30.3 29.2 20.6 51.9 55.2 56.3 45.5 56.0 40.7 33.3 65.7 30.8 WIND SPEED (MEAN KNOTS) 2.4 3.3 2.4 3.4 2.7 2.9 1.6 2.2 2.5 2.7 1.8 3.5 2.6 FASTEST WIND DIRECTION 350 210 310 190 330 330 310 350 60 330 210 240 240 FASTEST WIND SPEED (KNOTS) 14 18 18 17 12 12 10 15 12 18 18 20 20 DAY 14 9 9 14 11 12 15 7 6 8 18 8 DAYS WITH SKY CLEAR (0-2)/8 6 3 4 5 4 13 19 9 14 8 5 6 96 DAYS WITH P.CLOUDY (3-6)/8 9 10 3 7 16 12 9 14 14 13 10 8 125 DAYS WITH CLOUDY (7-8)/8 16 15 24 18 11 5 3 8 2 10 15 17 144 DAYS WITH VISIBILITY =< 2 KM 5 3 11 6 0 0 0 0 0 0 3 0 28 DURATION OF SUNSHINE HOURS 96.2 53.6 55.7 92.2 193.9 222.4 278.8 200.9 247.9 162.8 94.9 69.4 1768.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1027.8 1017.2 1019.1 1017.1 1015.0 1011.0 1009.5 1011.1 1017.1 1021.0 1020.0 1019.4 1017.1 MAX. QFE PRESSURE IN HPA 1043.4 1032.8 1032.5 1030.7 1023.4 1020.8 1016.4 1017.8 1026.8 1032.3 1031.2 1034.4 1043.4 DAY-HOUR 8-15 1- 9 6- 6 9- 9 2- 3 17- 3 12- 3 7- 6 23- 6 31- 6 20- 9 31- 9 MIN. QFE PRESSURE IN HPA 1012.7 996.4 1004.5 995.6 1007.2 1001.3 1000.2 1005.1 1007.0 1007.6 1006.1 1004.6 995.6 DAY-HOUR 13-12 27-15 11-15 14-15 25-15 21-15 4-15 18-15 7-15 24- 3 18-12 7-15 MEAN QNH PRESSURE IN HPA 1026.6 1016.1 1018.0 1016.0 1013.8 1009.8 1008.4 1010.0 1016.0 1019.8 1018.9 1018.3 1016.0 MAX. QNH PRESSURE IN HPA 1042.3 1031.7 1031.4 1029.6 1022.3 1019.7 1015.3 1016.7 1025.7 1031.2 1030.1 1033.3 1042.3 DAY-HOUR 8-15 1- 9 6- 6 9- 9 2- 3 17- 3 12- 3 7- 6 23- 6 31- 6 20- 9 31- 9 MIN. QNH PRESSURE IN HPA 1011.6 995.3 1003.4 994.5 1006.1 1000.2 999.1 1004.0 1005.9 1006.5 1005.0 1003.5 994.5 DAY-HOUR 13-12 27-15 11-15 14-15 25-15 21-15 4-15 18-15 7-15 24- 3 18-12 7-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1027.6 1017.3 1019.4 1017.2 1015.4 1011.7 1010.1 1011.7 1017.4 1021.1 1020.3 1019.3 1017.4 MAX. QFE PRESSURE IN HPA 1040.0 1027.7 1031.5 1029.6 1023.4 1020.8 1016.4 1017.1 1026.1 1030.9 1029.7 1031.7 1040.0 DAY 9 2 6 9 2 17 12 7 23 31 20 31 MIN. QFE PRESSURE IN HPA 1014.7 1001.8 1009.1 996.6 1007.9 1004.3 1003.1 1006.6 1009.8 1007.6 1007.5 1007.8 996.6 DAY 13 10 28 14 26 21 21 18 7 24 18 13 MEAN QNH PRESSURE IN HPA 1026.5 1016.1 1018.3 1016.0 1014.3 1010.5 1009.0 1010.6 1016.3 1019.9 1019.2 1018.1 1016.2 MAX. QNH PRESSURE IN HPA 1038.9 1026.6 1030.4 1028.5 1022.3 1019.7 1015.3 1016.0 1025.0 1029.8 1028.6 1030.6 1038.9 DAY 9 2 6 9 2 17 12 7 23 31 20 31 MIN. QNH PRESSURE IN HPA 1013.6 1000.7 1008.0 995.5 1006.8 1003.2 1002.0 1005.5 1008.7 1006.5 1006.4 1006.7 995.5 DAY 13 10 28 14 26 21 21 18 7 24 18 13 MEAN QFF PRESSURE IN HPA 1026.7 1016.4 1018.6 1016.3 1014.6 1010.9 1009.3 1010.9 1016.6 1020.2 1019.5 1018.4 1016.5 MAX. QFF PRESSURE IN HPA 1039.1 1026.8 1030.6 1028.7 1022.6 1020.0 1015.6 1016.3 1025.3 1030.1 1028.8 1030.8 1039.1 DAY 9 2 6 9 2 17 12 7 23 31 20 31 MIN. QFF PRESSURE IN HPA 1013.9 1001.0 1008.3 995.8 1007.1 1003.5 1002.3 1005.8 1009.0 1006.8 1006.7 1007.0 995.8 DAY 13 10 28 14 26 21 21 18 8 24 18 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1028.6 1018.1 1020.2 1017.8 1015.8 1011.8 1010.4 1012.1 1018.1 1022.1 1021.1 1020.3 1018.0 MAX. QFE PRESSURE IN HPA 1040.2 1030.7 1032.5 1030.4 1023.2 1020.2 1016.0 1017.8 1026.8 1032.3 1031.1 1033.2 1040.2 DAY 8 1 6 9 2 17 12 7 23 31 20 31 MIN. QFE PRESSURE IN HPA 1015.2 1002.7 1008.8 996.7 1008.6 1004.3 1003.6 1007.9 1010.1 1008.7 1007.5 1008.4 996.7 DAY 13 10 28 14 26 21 21 10 8 7 18 14 MEAN QNH PRESSURE IN HPA 1027.4 1017.0 1019.0 1016.7 1014.7 1010.7 1009.3 1011.0 1017.0 1021.0 1020.0 1019.1 1016.9 MAX. QNH PRESSURE IN HPA 1039.1 1029.6 1031.4 1029.3 1022.1 1019.1 1014.9 1016.7 1025.7 1031.2 1030.0 1032.1 1039.1 DAY 8 1 6 9 2 17 12 7 23 31 20 31 MIN. QNH PRESSURE IN HPA 1014.1 1001.6 1007.7 995.6 1007.5 1003.2 1002.5 1006.8 1009.0 1007.6 1006.4 1007.3 995.6 DAY 13 10 28 14 26 21 21 10 8 7 18 14 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 1028.3 1017.8 1019.6 1017.5 1015.4 1011.3 1010.0 1011.5 1017.5 1021.4 1020.6 1020.1 1017.6 MAX. QFE PRESSURE IN HPA 1041.7 1032.8 1032.0 1030.7 1022.9 1020.4 1015.0 1017.5 1025.9 1031.6 1031.2 1034.4 1041.7 DAY 8 1 6 9 2 16 12 7 23 31 20 31 MIN. QFE PRESSURE IN HPA 1014.0 998.9 1008.5 996.8 1008.2 1002.3 1003.0 1007.4 1009.1 1008.3 1007.3 1008.8 996.8 DAY 13 27 28 14 26 21 21 10 8 8 18 14 MEAN QNH PRESSURE IN HPA 1027.2 1016.6 1018.5 1016.3 1014.3 1010.2 1008.9 1010.3 1016.4 1020.3 1019.4 1019.0 1016.5 MAX. QNH PRESSURE IN HPA 1040.6 1031.7 1030.9 1029.6 1021.8 1019.3 1013.9 1016.4 1024.8 1030.5 1030.1 1033.3 1040.6 DAY 8 1 6 9 2 16 12 7 23 31 20 31 MIN. QNH PRESSURE IN HPA 1012.9 997.8 1007.4 995.7 1007.1 1001.2 1001.9 1006.3 1008.0 1007.2 1006.2 1007.7 995.7 DAY 13 27 28 14 26 21 21 10 8 8 18 14 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 1027.0 1016.4 1018.3 1016.6 1014.2 1010.2 1008.8 1010.2 1016.3 1020.1 1019.0 1018.5 1016.3 MAX. QFE PRESSURE IN HPA 1041.5 1031.2 1031.1 1029.9 1022.0 1019.7 1014.4 1017.1 1025.2 1030.8 1028.1 1033.6 1041.5 DAY 8 1 6 9 1 16 12 7 23 31 20 31 MIN. QFE PRESSURE IN HPA 1012.7 997.3 1005.5 996.1 1007.3 1001.8 1001.4 1005.7 1007.7 1007.9 1006.1 1005.2 996.1 DAY 13 27 11 14 11 21 4 16 7 8 18 7 MEAN QNH PRESSURE IN HPA 1025.8 1015.2 1017.1 1015.5 1013.1 1009.1 1007.7 1009.1 1015.2 1019.0 1017.8 1017.4 1015.2 MAX. QNH PRESSURE IN HPA 1040.4 1030.1 1030.0 1028.8 1020.9 1018.6 1013.3 1016.0 1024.1 1029.7 1027.0 1032.5 1040.4 DAY 8 1 6 9 1 16 12 7 23 31 20 31 MIN. QNH PRESSURE IN HPA 1011.6 996.2 1004.4 995.0 1006.2 1000.7 1000.3 1004.6 1006.6 1006.8 1005.0 1004.1 995.0 DAY 13 27 11 14 11 21 4 16 7 8 18 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1027.5 1016.4 1018.3 1016.6 1014.0 1009.8 1008.3 1010.0 1016.2 1020.2 1019.1 1019.0 1016.3 MAX. QFE PRESSURE IN HPA 1043.4 1031.2 1031.5 1029.5 1023.1 1019.9 1013.8 1017.1 1025.2 1030.3 1027.9 1034.4 1043.4 DAY 8 1 5 9 1 16 11 7 23 31 19 31 MIN. QFE PRESSURE IN HPA 1013.0 996.4 1004.5 995.6 1007.2 1001.3 1000.2 1005.1 1007.0 1008.3 1007.7 1004.6 995.6 DAY 13 27 11 14 25 21 4 18 7 6 18 7 MEAN QNH PRESSURE IN HPA 1026.3 1015.3 1017.1 1015.4 1012.9 1008.7 1007.2 1008.9 1015.1 1019.1 1017.9 1017.8 1015.1 MAX. QNH PRESSURE IN HPA 1042.3 1030.1 1030.4 1028.4 1022.0 1018.8 1012.7 1016.0 1024.1 1029.2 1026.8 1033.3 1042.3 DAY 8 1 5 9 1 16 11 7 23 31 19 31 MIN. QNH PRESSURE IN HPA 1011.9 995.3 1003.4 994.5 1006.1 1000.2 999.1 1004.0 1005.9 1007.2 1006.6 1003.5 994.5 DAY 13 27 11 14 25 21 4 18 7 6 18 7 MEAN QFF PRESSURE IN HPA 1026.6 1015.6 1017.4 1015.7 1013.2 1009.0 1007.5 1009.2 1015.4 1019.4 1018.2 1018.1 1015.5 MAX. QFF PRESSURE IN HPA 1042.5 1030.3 1030.6 1028.6 1022.3 1019.1 1013.0 1016.3 1024.4 1029.5 1027.1 1033.5 1042.5 DAY 8 1 5 9 1 16 11 7 23 31 19 31 MIN. QFF PRESSURE IN HPA 1012.2 995.6 1003.7 994.8 1006.4 1000.5 999.4 1004.3 1006.2 1007.5 1006.9 1003.8 994.8 DAY 13 27 11 14 25 21 4 18 7 6 18 7 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.5 -0.2 5.7 17.2 19.9 26.1 28.4 27.0 23.9 20.9 14.0 5.4 15.9 MINIMUN AIR TEMPERATURE (C) -4.2 -7.2 0.2 5.7 10.3 15.3 17.8 14.5 14.0 11.9 4.0 -1.2 6.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 16 19 0 0 0 0 0 0 0 0 0 8 43 DAYS WITH FREEZING MIN.<= 0 28 27 21 3 0 0 0 0 0 0 2 18 99 TEMPERATURE RECORDS LOWEST(C) -12.0 -18.0 -3.0 0.0 6.0 12.0 14.0 9.0 11.0 7.0 -1.0 -9.0 -18.0 DAY 25 2 10 3 8 18 29 30 19 31 10 26 MAXIMUM AIR TEMPERATURE (C) 5.7 3.8 9.2 22.6 23.5 29.8 32.2 31.5 27.6 24.4 18.5 8.3 19.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 1 20 29 28 9 1 0 0 90 DAYS WITH MAXIMUM TEMP. <= 0 3 4 0 0 0 0 0 0 0 0 0 0 7 TEMPERATURE RECORDS HIGHEST(C) 20.0 10.0 23.0 37.0 30.0 34.0 35.0 34.0 33.0 30.0 29.0 16.0 37.0 DAY 13 25 25 28 31 22 24 18 1 6 7 19 DIF. BETWEEN (MAX.-MIN.) (C) 9.9 11.0 9.0 16.9 13.2 14.5 14.4 17.0 13.6 12.5 14.5 9.5 13.0 MEAN DAILY TEMP. (MDT) (C) 0.7 -1.7 4.7 14.1 16.9 22.5 25.0 23.0 20.8 18.1 11.3 3.6 13.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.0 1.0 51.5 124.5 70.5 20.5 4.5 0.0 0.0 274.5 HEATING DEG. DAYS(BASE 18 0C) 465.0 532.5 413.0 125.5 48.0 0.0 0.0 0.0 1.0 25.5 203.0 447.0 2260.5 DEWPOINT (MEAN C) 0.6 -1.8 3.1 10.8 14.6 20.2 21.8 20.1 20.0 17.8 10.2 3.3 11.7 MIXING RATIO (G/KG) 3.96 3.34 4.73 8.25 10.52 14.99 16.62 14.98 14.74 12.84 7.83 4.85 9.80 VAPOUR PRESSURE (HPA) 6.50 5.50 7.72 13.28 16.87 23.79 26.27 23.81 23.50 20.60 12.68 7.96 15.71 SATURATION DEF. (HPA) 1.15 0.71 1.94 7.52 6.91 10.66 13.01 12.67 6.82 4.52 3.98 1.32 5.93 RELATIVE HUMIDITY (MEAN %) 90 90 86 70 74 72 69 68 80 84 81 88 79 RELATIVE HUMIDITY (MAX. %) 98 97 97 91 91 90 89 91 96 97 94 95 94 RELATIVE HUMIDITY (MIN. %) 82 82 76 54 61 59 55 54 68 72 67 78 67 RELATIVE HUMIDITY (MEAN% 03UTC) 97 95 96 90 90 89 89 91 96 96 92 95 93 RELATIVE HUMIDITY (MEAN% 09UTC) 89 90 83 61 68 65 63 60 74 76 76 86 74 RELATIVE HUMIDITY (MEAN% 15UTC) 86 90 82 65 67 66 62 62 76 82 83 86 76 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 268.0 237.0 181.0 16.0 114.6 19.0 2.0 121.0 120.4 177.0 299.0 412.6 1967.6 DAYS WITH PRECIPITATION >=10 11 8 8 1 3 0 0 1 3 4 10 13 62 DAYS WITH PRECIPITATION >= 5 14 10 12 1 5 1 0 2 4 5 11 15 80 DAYS WITH PRECIPITATION >= 1 17 10 20 1 8 8 2 3 7 9 12 18 115 DAYS WITH PRECIPITATION 17 10 20 1 9 8 2 3 7 9 12 19 117 GREATEST DAILY PRECIPITATION 35.0 60.0 35.0 16.0 70.0 6.0 1.0 110.0 56.0 87.0 106.0 58.0 110.0 DAY 19 8 19 4 7 9 9 1 7 8 5 21 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 7 6 4 0 0 0 0 0 0 0 0 5 22 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 270 45 45 45 270 45 45 45 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.0 8.6 7.3 6.8 5.8 6.3 4.1 6.8 7.4 5.1 6.0 6.9 6.9 PREVAILING WIND PERCENT 36.9 21.5 13.5 12.7 13.5 12.7 5.8 17.4 12.0 9.7 14.7 16.8 12.0 CALMS PERCENT OF WIND 51.1 65.2 61.3 60.0 54.8 57.3 81.3 49.0 63.3 72.3 55.3 59.4 60.9 NO. OF WIND OBSERVATION 141 135 155 150 155 150 155 155 150 155 150 155 1806 VECTOR WIND DIRECTION (MEAN) 274 278 296 19 35 54 313 53 344 332 274 258 309 VECTOR WIND MAGNITUDE(KNOTS) 3.1 2.3 1.0 1.2 1.2 1.1 0.2 1.5 1.1 0.6 1.3 2.1 0.8 WIND STEADINESES (MEAN %) 86.1 85.2 35.7 41.4 44.4 44.0 22.2 48.4 44.0 35.3 40.6 72.4 30.8 WIND SPEED (MEAN KNOTS) 3.6 2.7 2.8 2.9 2.7 2.5 0.9 3.1 2.5 1.7 3.2 2.9 2.6 FASTEST WIND DIRECTION 210 270 210 30 360 60 360 120 290 270 190 320 210 FASTEST WIND SPEED (KNOTS) 20 16 18 15 15 12 10 18 18 15 15 15 20 DAY 13 1 25 13 2 6 13 15 22 29 27 19 DAYS WITH SKY CLEAR (0-2)/8 4 7 4 1 6 13 14 17 7 1 10 4 88 DAYS WITH P.CLOUDY (3-6)/8 4 4 6 19 13 10 13 10 12 15 9 8 123 DAYS WITH CLOUDY (7-8)/8 21 14 21 10 12 7 4 4 11 15 11 19 149 DAYS WITH VISIBILITY =< 2 KM 8 8 8 4 1 2 0 0 1 1 1 3 37 DURATION OF SUNSHINE HOURS 52.0 47.4 64.7 156.4 165.3 210.7 223.4 236.4 159.6 91.4 133.9 55.9 1597.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1027.1 1029.7 1023.2 1015.3 1014.8 1011.4 1009.8 1013.3 1016.1 1019.2 1021.3 1029.2 1019.2 MAX. QFE PRESSURE IN HPA 1040.4 1044.8 1037.7 1030.2 1027.5 1020.3 1015.5 1021.7 1027.2 1026.8 1030.4 1039.4 1044.8 DAY-HOUR 4-15 22- 3 20- 6 1- 6 23- 6 17- 9 16- 6 24-12 17- 9 25-15 11- 6 23- 6 MIN. QFE PRESSURE IN HPA 1009.2 1014.4 1006.9 1002.8 998.6 999.9 1002.7 1006.9 1007.0 1010.9 1005.3 1012.4 998.6 DAY-HOUR 13-12 14-15 25-15 3-15 6-12 21-15 6-12 17-12 13-12 21-15 3-15 16- 3 MEAN QNH PRESSURE IN HPA 1025.9 1028.5 1022.0 1014.1 1013.7 1010.3 1008.6 1012.1 1015.0 1018.1 1020.1 1028.1 1018.1 MAX. QNH PRESSURE IN HPA 1039.3 1043.7 1036.6 1029.1 1026.4 1019.2 1014.4 1020.6 1026.1 1025.7 1029.3 1038.3 1043.7 DAY-HOUR 4-15 22- 3 20- 6 1- 6 23- 6 17- 9 16- 6 24-12 17- 9 25-15 11- 6 23- 6 MIN. QNH PRESSURE IN HPA 1008.1 1013.3 1005.8 1001.7 997.5 998.8 1001.6 1005.8 1005.9 1009.8 1004.2 1011.3 997.5 DAY-HOUR 13-12 14-15 25-15 3-15 6-12 21-15 6-12 17-12 13-12 21-15 3-15 16- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1027.3 1029.6 1023.2 1015.8 1015.0 1012.0 1010.4 1013.7 1016.6 1019.6 1021.7 1029.4 1019.5 MAX. QFE PRESSURE IN HPA 1037.2 1044.8 1035.9 1029.6 1026.6 1019.7 1015.3 1019.5 1026.1 1025.6 1029.9 1039.4 1044.8 DAY 30 22 20 1 23 17 15 25 17 26 9 25 MIN. QFE PRESSURE IN HPA 1013.0 1016.1 1010.6 1008.0 999.8 1002.9 1003.1 1007.3 1009.7 1013.6 1009.9 1012.4 999.8 DAY 13 17 12 3 6 30 6 17 13 21 27 16 MEAN QNH PRESSURE IN HPA 1026.2 1028.4 1022.1 1014.6 1013.9 1010.9 1009.2 1012.6 1015.4 1018.5 1020.6 1028.3 1018.4 MAX. QNH PRESSURE IN HPA 1036.1 1043.7 1034.8 1028.5 1025.5 1018.6 1014.2 1018.4 1025.0 1024.5 1028.8 1038.3 1043.7 DAY 30 22 20 1 23 17 15 25 17 26 9 25 MIN. QNH PRESSURE IN HPA 1011.9 1015.0 1009.5 1006.9 998.7 1001.8 1002.0 1006.2 1008.6 1012.5 1008.8 1011.3 998.7 DAY 13 17 12 3 6 30 6 17 13 21 27 16 MEAN QFF PRESSURE IN HPA 1026.4 1028.3 1022.4 1014.9 1014.2 1011.2 1009.6 1012.9 1015.7 1018.8 1020.9 1028.5 1018.6 MAX. QFF PRESSURE IN HPA 1036.3 1043.9 1035.0 1028.8 1025.8 1018.9 1014.5 1018.7 1025.3 1024.8 1029.0 1038.5 1043.9 DAY 30 22 20 1 23 17 15 25 17 26 9 25 MIN. QFF PRESSURE IN HPA 1012.1 1015.2 1009.8 1007.2 999.0 1002.1 1002.3 1006.5 1008.9 1012.8 1009.1 1011.5 999.0 DAY 13 17 12 3 6 30 6 17 13 21 27 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1028.0 1030.1 1023.9 1016.3 1015.4 1012.0 1010.5 1014.0 1017.0 1020.2 1022.3 1030.0 1020.0 MAX. QFE PRESSURE IN HPA 1038.0 1044.8 1037.7 1030.2 1027.5 1019.7 1015.5 1019.5 1026.9 1026.1 1030.4 1039.4 1044.8 DAY 30 22 20 1 23 17 16 25 17 26 11 23 MIN. QFE PRESSURE IN HPA 1013.2 1015.7 1011.3 1007.5 998.7 1002.9 1003.2 1007.6 1009.3 1014.1 1010.5 1013.0 998.7 DAY 13 17 25 3 6 30 6 17 13 20 3 16 MEAN QNH PRESSURE IN HPA 1026.9 1028.9 1022.7 1015.1 1014.2 1010.9 1009.3 1012.8 1015.9 1019.1 1021.1 1028.9 1018.8 MAX. QNH PRESSURE IN HPA 1036.9 1043.7 1036.6 1029.1 1026.4 1018.6 1014.4 1018.4 1025.8 1025.0 1029.3 1038.3 1043.7 DAY 30 22 20 1 23 17 16 25 17 26 11 23 MIN. QNH PRESSURE IN HPA 1012.1 1014.6 1010.2 1006.4 997.6 1001.8 1002.1 1006.5 1008.2 1013.0 1009.4 1011.9 997.6 DAY 13 17 25 3 6 30 6 17 13 20 3 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1028.0 1030.1 1023.8 1015.9 1015.2 1011.8 1010.1 1013.5 1016.6 1019.9 1021.9 1030.1 1019.7 MAX. QFE PRESSURE IN HPA 1038.5 1044.3 1036.0 1029.6 1027.1 1020.3 1015.3 1019.4 1027.2 1026.4 1030.3 1039.4 1044.3 DAY 4 22 20 1 23 17 15 24 17 8 11 23 MIN. QFE PRESSURE IN HPA 1011.9 1015.8 1010.6 1006.3 998.8 1002.5 1003.4 1007.3 1008.5 1014.0 1009.9 1012.7 998.8 DAY 13 17 25 3 6 30 6 17 13 21 3 16 MEAN QNH PRESSURE IN HPA 1026.8 1029.0 1022.7 1014.8 1014.1 1010.6 1009.0 1012.4 1015.4 1018.7 1020.7 1028.9 1018.6 MAX. QNH PRESSURE IN HPA 1037.4 1043.2 1034.9 1028.5 1026.0 1019.2 1014.2 1018.3 1026.1 1025.3 1029.2 1038.3 1043.2 DAY 4 22 20 1 23 17 15 24 17 8 11 23 MIN. QNH PRESSURE IN HPA 1010.8 1014.7 1009.5 1005.2 997.7 1001.4 1002.3 1006.2 1007.4 1012.9 1008.8 1011.6 997.7 DAY 13 17 25 3 6 30 6 17 13 21 3 16 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 1025.7 1029.1 1022.5 1014.3 1014.3 1010.9 1009.2 1012.8 1015.2 1018.3 1020.2 1028.3 1018.4 MAX. QFE PRESSURE IN HPA 1039.6 1042.9 1034.6 1027.9 1025.4 1019.4 1014.7 1021.7 1026.8 1026.4 1029.3 1038.2 1042.9 DAY 4 22 20 1 22 17 15 24 17 25 11 23 MIN. QFE PRESSURE IN HPA 1009.2 1015.2 1007.5 1003.6 998.6 1001.4 1002.7 1006.9 1007.0 1011.4 1006.3 1013.2 998.6 DAY 13 14 25 3 6 30 6 17 13 21 3 16 MEAN QNH PRESSURE IN HPA 1024.6 1028.0 1021.4 1013.2 1013.2 1009.7 1008.1 1011.6 1014.1 1017.2 1019.1 1027.2 1017.3 MAX. QNH PRESSURE IN HPA 1038.5 1041.8 1033.5 1026.8 1024.3 1018.3 1013.6 1020.6 1025.7 1025.3 1028.2 1037.1 1041.8 DAY 4 22 20 1 22 17 15 24 17 25 11 23 MIN. QNH PRESSURE IN HPA 1008.1 1014.1 1006.4 1002.5 997.5 1000.3 1001.6 1005.8 1005.9 1010.3 1005.2 1012.1 997.5 DAY 13 14 25 3 6 30 6 17 13 21 3 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1026.1 1029.4 1022.5 1014.2 1014.4 1010.4 1008.8 1012.5 1015.1 1018.3 1020.4 1028.5 1018.4 MAX. QFE PRESSURE IN HPA 1040.4 1043.1 1034.2 1028.4 1025.3 1018.9 1014.4 1019.7 1027.0 1026.8 1029.3 1039.0 1043.1 DAY 4 21 15 1 23 17 15 24 17 25 11 23 MIN. QFE PRESSURE IN HPA 1009.2 1014.4 1006.9 1002.8 999.7 999.9 1002.7 1006.9 1007.5 1010.9 1005.3 1015.0 999.7 DAY 13 14 25 3 6 21 6 17 1 21 3 15 MEAN QNH PRESSURE IN HPA 1025.0 1028.3 1021.3 1013.0 1013.2 1009.3 1007.7 1011.4 1014.0 1017.1 1019.2 1027.4 1017.2 MAX. QNH PRESSURE IN HPA 1039.3 1042.0 1033.1 1027.3 1024.2 1017.8 1013.3 1018.6 1025.9 1025.7 1028.2 1037.9 1042.0 DAY 4 21 15 1 23 17 15 24 17 25 11 23 MIN. QNH PRESSURE IN HPA 1008.1 1013.3 1005.8 1001.7 998.6 998.8 1001.6 1005.8 1006.4 1009.8 1004.2 1013.9 998.6 DAY 13 14 25 3 6 21 6 17 1 21 3 15 MEAN QFF PRESSURE IN HPA 1025.2 1028.5 1021.6 1013.3 1013.5 1009.6 1008.0 1011.7 1014.3 1017.5 1019.5 1027.6 1017.5 MAX. QFF PRESSURE IN HPA 1039.5 1042.2 1033.3 1027.5 1024.5 1018.1 1013.6 1018.9 1026.2 1026.0 1028.4 1038.1 1042.2 DAY 4 21 15 1 23 17 15 24 17 25 11 23 MIN. QFF PRESSURE IN HPA 1008.4 1013.5 1006.1 1002.0 998.9 999.1 1001.9 1006.1 1006.7 1010.1 1004.5 1014.1 998.9 DAY 13 14 25 3 6 21 6 17 1 21 3 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.5 8.9 10.2 15.3 20.6 23.1 26.2 26.3 21.2 19.1 12.9 8.5 16.3 MINIMUN AIR TEMPERATURE (C) -2.5 2.9 5.4 10.0 14.5 18.2 20.0 21.5 16.8 13.5 6.3 2.4 10.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 4 10 22 1 0 0 0 37 DAYS WITH MINIMUM TEMP. <=-4 9 0 0 0 0 0 0 0 0 0 0 0 9 DAYS WITH FREEZING MIN.<= 0 19 6 3 0 0 0 0 0 0 0 1 6 35 TEMPERATURE RECORDS LOWEST(C) -6.0 -3.0 -1.0 6.0 9.0 14.0 17.0 17.0 10.0 6.0 0.0 -2.0 -6.0 DAY 1 7 9 12 5 6 3 30 27 31 27 14 MAXIMUM AIR TEMPERATURE (C) 7.2 14.1 14.8 19.0 24.2 26.3 29.9 29.5 24.6 22.8 17.3 13.0 20.2 DAYS WITH MAXIMUM TEMP. >=30 0 1 0 1 2 7 20 22 2 1 1 0 57 DAYS WITH MAXIMUM TEMP. <= 0 2 0 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS HIGHEST(C) 14.0 31.0 28.0 30.0 30.0 32.0 33.0 34.0 30.0 30.0 31.0 24.0 34.0 DAY 12 19 2 17 28 27 21 5 3 19 15 6 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 11.2 9.4 9.0 9.7 8.1 9.9 8.0 7.8 9.3 11.0 10.6 9.5 MEAN DAILY TEMP. (MDT) (C) 2.3 8.5 10.1 14.5 19.3 22.2 25.0 25.5 20.7 18.1 11.8 7.7 15.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.5 12.0 56.0 122.5 142.0 22.0 2.0 0.5 0.0 359.5 HEATING DEG. DAYS(BASE 18 0C) 335.5 190.5 245.0 112.0 22.5 2.5 0.0 0.0 7.5 41.5 192.5 320.5 1470.0 DEWPOINT (MEAN C) 0.7 4.8 5.9 10.2 16.1 18.1 19.8 21.2 17.9 15.8 9.4 5.5 12.1 MIXING RATIO (G/KG) 4.01 5.40 5.81 7.81 11.63 13.22 14.82 15.98 12.86 11.35 7.56 5.65 9.67 VAPOUR PRESSURE (HPA) 6.56 8.75 9.44 12.58 18.60 21.07 23.46 25.34 20.62 18.26 12.23 9.21 15.51 SATURATION DEF. (HPA) 1.57 3.47 3.58 5.45 6.30 7.77 11.12 9.57 5.17 4.67 3.54 2.48 5.39 RELATIVE HUMIDITY (MEAN %) 84 80 78 75 78 76 70 76 83 83 82 84 79 RELATIVE HUMIDITY (MAX. %) 96 94 95 93 96 93 91 92 97 97 95 95 95 RELATIVE HUMIDITY (MIN. %) 73 64 64 62 64 62 58 64 72 70 68 72 66 RELATIVE HUMIDITY (MEAN% 03UTC) 96 94 94 93 96 93 91 91 96 96 94 95 94 RELATIVE HUMIDITY (MEAN% 09UTC) 79 73 71 66 69 68 62 70 77 78 75 78 72 RELATIVE HUMIDITY (MEAN% 15UTC) 81 74 74 70 72 69 63 70 78 78 78 81 74 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 120.2 63.0 106.8 11.4 54.6 55.6 6.0 95.0 234.0 86.0 186.0 196.0 1214.6 DAYS WITH PRECIPITATION >=10 5 2 4 0 3 2 0 5 7 2 7 6 43 DAYS WITH PRECIPITATION >= 5 7 6 7 1 3 4 0 5 8 4 7 6 58 DAYS WITH PRECIPITATION >= 1 9 8 11 3 6 7 3 7 13 7 10 12 96 DAYS WITH PRECIPITATION 11 8 15 4 7 7 3 7 13 7 10 12 104 GREATEST DAILY PRECIPITATION 35.0 19.0 24.0 5.0 20.0 27.0 2.0 39.0 60.0 38.0 78.0 48.0 78.0 DAY 16 22 29 1 4 6 12 29 6 27 6 12 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 4 0 0 0 0 0 0 0 0 0 0 1 5 DAYS WITH DUST 0 1 0 1 0 1 0 0 0 0 0 1 4 WIND DIRECTION (PREVAILING) 270 360 90 45 45 45 45 45 45 270 270 270 45 PREVAILING WIND SPEED(KNOTS) 8.4 6.4 6.0 6.1 6.7 4.8 4.9 5.5 5.5 5.0 8.3 6.8 5.9 PREVAILING WIND PERCENT 18.1 10.0 14.2 18.0 20.6 12.7 20.0 16.8 13.3 15.5 12.0 17.4 11.8 CALMS PERCENT OF WIND 53.5 69.3 42.6 42.0 43.2 58.0 29.7 25.2 32.7 51.0 42.7 39.4 43.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 286 356 23 50 25 7 18 345 355 330 320 273 346 VECTOR WIND MAGNITUDE(KNOTS) 2.6 0.8 0.9 1.4 2.5 0.8 1.2 1.7 1.5 0.8 1.5 1.6 1.1 WIND STEADINESES (MEAN %) 72.2 36.4 22.5 34.1 67.6 38.1 37.5 45.9 41.7 30.8 34.1 38.1 31.4 WIND SPEED (MEAN KNOTS) 3.6 2.2 4.0 4.1 3.7 2.1 3.2 3.7 3.6 2.6 4.4 4.2 3.5 FASTEST WIND DIRECTION 190 180 160 240 330 210 310 320 90 50 300 330 300 FASTEST WIND SPEED (KNOTS) 15 16 15 17 18 10 10 10 15 12 20 16 20 DAY 12 19 2 17 20 4 8 1 10 15 5 4 DAYS WITH SKY CLEAR (0-2)/8 8 7 5 4 9 9 6 7 6 6 8 7 82 DAYS WITH P.CLOUDY (3-6)/8 11 8 9 9 14 9 18 8 6 7 11 12 122 DAYS WITH CLOUDY (7-8)/8 12 13 17 17 8 12 7 16 18 18 11 12 161 DAYS WITH VISIBILITY =< 2 KM 4 5 1 8 4 2 1 1 4 5 0 4 39 DURATION OF SUNSHINE HOURS 81.5 100.6 96.0 105.6 203.5 134.6 195.7 112.4 92.8 91.8 123.5 114.0 1452.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1026.4 1018.1 1020.8 1014.8 1015.2 1013.1 1009.1 1012.6 1018.3 1019.9 1020.2 1024.0 1017.7 MAX. QFE PRESSURE IN HPA 1043.8 1032.1 1034.4 1027.4 1026.5 1022.2 1016.7 1019.9 1031.6 1033.2 1035.0 1035.7 1043.8 DAY-HOUR 25- 6 2- 6 9- 6 11- 3 7- 6 6- 6 22- 9 30- 3 26-12 27- 6 20- 6 21- 6 MIN. QFE PRESSURE IN HPA 1006.1 999.9 1006.6 998.5 1001.7 1003.8 1001.3 1003.5 1009.8 1009.1 1006.4 1004.1 998.5 DAY-HOUR 13- 3 22-12 20-15 18-15 30-15 15-15 29-12 9-15 9- 3 31-15 1- 3 17-15 MEAN QNH PRESSURE IN HPA 1025.2 1016.9 1019.7 1013.6 1014.1 1012.0 1008.0 1011.5 1017.1 1018.8 1019.0 1022.9 1016.6 MAX. QNH PRESSURE IN HPA 1042.7 1031.0 1033.3 1026.3 1025.4 1021.1 1015.6 1018.8 1030.5 1032.1 1033.9 1034.6 1042.7 DAY-HOUR 25- 6 2- 6 9- 6 11- 3 7- 6 6- 6 22- 9 30- 3 26-12 27- 6 20- 6 21- 6 MIN. QNH PRESSURE IN HPA 1005.0 998.8 1005.5 997.4 1000.6 1002.7 1000.2 1002.4 1008.7 1008.0 1005.3 1003.0 997.4 DAY-HOUR 13- 3 22-12 20-15 18-15 30-15 15-15 29-12 9-15 9- 3 31-15 1- 3 17-15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1026.4 1017.8 1021.1 1014.9 1015.7 1013.4 1009.7 1013.4 1018.7 1020.0 1020.4 1023.6 1017.9 MAX. QFE PRESSURE IN HPA 1043.5 1031.6 1033.7 1027.4 1025.6 1021.4 1016.1 1019.9 1028.7 1032.1 1033.5 1034.7 1043.5 DAY 25 2 9 11 7 6 1 30 26 27 20 21 MIN. QFE PRESSURE IN HPA 1006.1 1002.0 1008.1 1004.9 1003.3 1004.3 1001.7 1006.5 1009.8 1011.7 1006.4 1006.3 1001.7 DAY 13 22 2 21 30 27 29 9 9 24 1 17 MEAN QNH PRESSURE IN HPA 1025.3 1016.7 1019.9 1013.8 1014.6 1012.3 1008.6 1012.2 1017.6 1018.9 1019.2 1022.4 1016.8 MAX. QNH PRESSURE IN HPA 1042.4 1030.5 1032.6 1026.3 1024.5 1020.3 1015.0 1018.8 1027.6 1031.0 1032.4 1033.6 1042.4 DAY 25 2 9 11 7 6 1 30 26 27 20 21 MIN. QNH PRESSURE IN HPA 1005.0 1000.9 1007.0 1003.8 1002.2 1003.2 1000.6 1005.4 1008.7 1010.6 1005.3 1005.2 1000.6 DAY 13 22 2 21 30 27 29 9 9 24 1 17 MEAN QFF PRESSURE IN HPA 1025.5 1017.0 1020.2 1014.1 1014.9 1012.6 1008.9 1012.6 1017.9 1019.2 1019.5 1022.7 1017.1 MAX. QFF PRESSURE IN HPA 1042.6 1030.7 1032.8 1026.6 1024.8 1020.6 1015.3 1019.1 1027.9 1031.2 1032.6 1033.8 1042.6 DAY 25 2 9 11 7 6 1 30 26 27 20 21 MIN. QFF PRESSURE IN HPA 1005.3 1001.2 1007.3 1004.1 1002.5 1003.5 1000.9 1005.7 1009.0 1010.9 1005.6 1005.5 1000.9 DAY 13 22 2 21 30 27 29 9 9 24 1 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1027.4 1019.0 1021.8 1015.5 1016.1 1013.7 1009.9 1013.6 1019.2 1021.2 1021.0 1024.8 1018.6 MAX. QFE PRESSURE IN HPA 1043.8 1032.1 1034.4 1027.4 1026.5 1022.2 1016.6 1019.8 1031.5 1033.2 1035.0 1035.7 1043.8 DAY 25 2 9 11 7 6 22 30 26 27 20 21 MIN. QFE PRESSURE IN HPA 1009.5 1001.5 1009.1 1004.8 1004.5 1005.4 1002.3 1006.3 1011.1 1013.1 1007.9 1006.2 1001.5 DAY 13 22 2 18 30 16 29 9 9 24 1 17 MEAN QNH PRESSURE IN HPA 1026.2 1017.8 1020.7 1014.4 1015.0 1012.6 1008.8 1012.5 1018.1 1020.0 1019.9 1023.6 1017.5 MAX. QNH PRESSURE IN HPA 1042.7 1031.0 1033.3 1026.3 1025.4 1021.1 1015.5 1018.7 1030.4 1032.1 1033.9 1034.6 1042.7 DAY 25 2 9 11 7 6 22 30 26 27 20 21 MIN. QNH PRESSURE IN HPA 1008.4 1000.4 1008.0 1003.7 1003.4 1004.3 1001.2 1005.2 1010.0 1012.0 1006.8 1005.1 1000.4 DAY 13 22 2 18 30 16 29 9 9 24 1 17 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 1027.3 1018.8 1021.2 1015.1 1015.4 1013.3 1009.4 1013.0 1018.6 1020.6 1020.6 1024.9 1018.2 MAX. QFE PRESSURE IN HPA 1043.7 1031.9 1033.5 1027.3 1025.9 1021.9 1016.7 1019.3 1031.5 1032.6 1034.4 1035.6 1043.7 DAY 25 2 9 10 7 4 22 30 26 27 20 26 MIN. QFE PRESSURE IN HPA 1010.4 1000.3 1008.8 1003.7 1002.9 1005.4 1002.0 1004.6 1011.1 1013.5 1007.2 1006.0 1000.3 DAY 12 22 2 18 30 16 29 9 9 24 1 17 MEAN QNH PRESSURE IN HPA 1026.2 1017.6 1020.1 1014.0 1014.3 1012.2 1008.3 1011.9 1017.5 1019.5 1019.4 1023.8 1017.1 MAX. QNH PRESSURE IN HPA 1042.6 1030.8 1032.4 1026.2 1024.8 1020.8 1015.6 1018.2 1030.4 1031.5 1033.3 1034.5 1042.6 DAY 25 2 9 10 7 4 22 30 26 27 20 26 MIN. QNH PRESSURE IN HPA 1009.3 999.2 1007.7 1002.6 1001.8 1004.3 1000.9 1003.5 1010.0 1012.4 1006.1 1004.9 999.2 DAY 12 22 2 18 30 16 29 9 9 24 1 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1025.4 1017.3 1020.0 1014.3 1014.6 1012.6 1008.5 1011.8 1017.5 1018.9 1019.1 1023.4 1017.0 MAX. QFE PRESSURE IN HPA 1042.4 1029.2 1032.5 1026.8 1025.9 1021.9 1015.9 1017.3 1031.6 1029.9 1032.7 1034.2 1042.4 DAY 25 2 9 10 7 4 22 6 26 27 6 26 MIN. QFE PRESSURE IN HPA 1007.5 999.9 1007.0 1001.0 1002.4 1004.8 1001.3 1004.1 1011.1 1010.7 1007.8 1004.2 999.9 DAY 12 22 3 18 28 15 29 9 5 31 1 17 MEAN QNH PRESSURE IN HPA 1024.3 1016.2 1018.9 1013.2 1013.5 1011.5 1007.4 1010.6 1016.4 1017.8 1018.0 1022.2 1015.8 MAX. QNH PRESSURE IN HPA 1041.3 1028.1 1031.4 1025.7 1024.8 1020.8 1014.8 1016.2 1030.5 1028.8 1031.6 1033.1 1041.3 DAY 25 2 9 10 7 4 22 6 26 27 6 26 MIN. QNH PRESSURE IN HPA 1006.4 998.8 1005.9 999.9 1001.3 1003.7 1000.2 1003.0 1010.0 1009.6 1006.7 1003.1 998.8 DAY 12 22 3 18 28 15 29 9 5 31 1 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1025.4 1017.5 1020.1 1014.0 1014.5 1012.4 1008.2 1011.4 1017.4 1019.0 1019.8 1023.5 1016.9 MAX. QFE PRESSURE IN HPA 1042.8 1029.6 1032.2 1026.3 1025.9 1021.7 1015.5 1017.3 1031.2 1030.1 1033.2 1033.9 1042.8 DAY 25 2 9 10 7 4 22 6 26 27 6 26 MIN. QFE PRESSURE IN HPA 1007.5 1000.1 1006.6 998.5 1001.7 1003.8 1001.6 1003.5 1010.7 1009.1 1010.1 1004.1 998.5 DAY 12 22 20 18 30 15 29 9 8 31 1 17 MEAN QNH PRESSURE IN HPA 1024.3 1016.4 1018.9 1012.8 1013.3 1011.3 1007.1 1010.3 1016.3 1017.8 1018.7 1022.4 1015.8 MAX. QNH PRESSURE IN HPA 1041.7 1028.5 1031.1 1025.2 1024.8 1020.6 1014.4 1016.2 1030.1 1029.0 1032.1 1032.8 1041.7 DAY 25 2 9 10 7 4 22 6 26 27 6 26 MIN. QNH PRESSURE IN HPA 1006.4 999.0 1005.5 997.4 1000.6 1002.7 1000.5 1002.4 1009.6 1008.0 1009.0 1003.0 997.4 DAY 12 22 20 18 30 15 29 9 8 31 1 17 MEAN QFF PRESSURE IN HPA 1024.6 1016.7 1019.2 1013.1 1013.6 1011.6 1007.4 1010.6 1016.6 1018.2 1019.0 1022.7 1016.1 MAX. QFF PRESSURE IN HPA 1041.9 1028.7 1031.3 1025.5 1025.1 1020.9 1014.7 1016.5 1030.4 1029.2 1032.3 1033.0 1041.9 DAY 25 2 9 10 7 4 22 6 26 27 6 26 MIN. QFF PRESSURE IN HPA 1006.7 999.3 1005.8 997.7 1000.9 1003.0 1000.8 1002.7 1009.9 1008.3 1009.3 1003.3 997.7 DAY 12 22 20 18 30 15 29 9 8 31 1 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.7 4.7 8.4 12.9 21.4 25.4 24.3 24.8 21.6 20.4 15.4 9.6 16.1 MINIMUN AIR TEMPERATURE (C) 1.5 0.9 5.0 7.8 15.6 18.7 19.8 19.4 15.9 10.2 9.7 2.6 10.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 5 10 6 0 0 0 0 21 DAYS WITH MINIMUM TEMP. <=-4 0 5 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 10 11 4 0 0 0 0 0 0 0 0 11 36 TEMPERATURE RECORDS LOWEST(C) -3.0 -7.0 -2.0 3.0 9.0 14.0 16.0 17.0 13.0 5.0 2.0 -3.0 -7.0 DAY 26 4 7 2 2 9 9 25 25 20 28 25 MAXIMUM AIR TEMPERATURE (C) 7.6 7.9 11.5 17.1 25.4 29.3 27.6 28.5 25.2 26.4 19.7 15.0 20.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 2 16 12 17 0 5 2 0 57 DAYS WITH MAXIMUM TEMP. <= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 15.0 17.0 29.0 35.0 30.0 32.0 34.0 34.0 29.0 35.0 36.0 22.0 36.0 DAY 21 9 17 20 13 13 2 21 15 28 3 21 DIF. BETWEEN (MAX.-MIN.) (C) 6.1 7.0 6.5 9.3 9.8 10.6 7.8 9.1 9.3 16.2 10.0 12.4 9.5 MEAN DAILY TEMP. (MDT) (C) 4.5 4.4 8.2 12.5 20.5 24.0 23.7 24.0 20.5 18.3 14.7 8.8 15.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 3.5 18.0 92.5 92.5 96.5 12.5 4.5 6.5 0.0 326.5 HEATING DEG. DAYS(BASE 18 0C) 403.0 380.5 305.0 177.5 7.0 0.0 0.5 0.0 0.0 18.0 114.0 284.0 1689.5 DEWPOINT (MEAN C) 3.0 2.7 5.9 8.8 16.0 18.6 20.6 20.0 17.5 13.6 12.4 6.0 12.1 MIXING RATIO (G/KG) 4.66 4.61 5.83 7.11 11.51 13.57 15.41 14.91 12.53 9.83 9.01 5.90 9.57 VAPOUR PRESSURE (HPA) 7.61 7.54 9.51 11.47 18.40 21.58 24.44 23.67 20.06 15.87 14.58 9.58 15.36 SATURATION DEF. (HPA) 1.12 1.20 2.17 4.39 7.58 11.47 6.63 8.42 6.29 9.18 3.40 2.89 5.39 RELATIVE HUMIDITY (MEAN %) 90 88 86 80 73 68 82 77 79 69 84 81 80 RELATIVE HUMIDITY (MAX. %) 96 97 95 96 91 91 96 95 95 95 97 97 95 RELATIVE HUMIDITY (MIN. %) 83 79 77 66 60 54 70 63 66 49 71 63 67 RELATIVE HUMIDITY (MEAN% 03UTC) 95 96 93 96 91 91 95 95 95 94 97 95 94 RELATIVE HUMIDITY (MEAN% 09UTC) 88 85 84 74 65 59 75 71 72 58 77 77 74 RELATIVE HUMIDITY (MEAN% 15UTC) 88 85 84 75 69 62 77 72 73 62 82 78 76 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 272.0 275.0 159.0 139.4 10.0 18.0 202.0 97.0 95.0 0.0 161.4 119.2 1548.0 DAYS WITH PRECIPITATION >=10 13 8 7 6 0 1 6 4 3 0 3 4 55 DAYS WITH PRECIPITATION >= 5 15 13 12 9 0 1 8 7 7 0 6 6 84 DAYS WITH PRECIPITATION >= 1 20 14 21 13 4 4 11 11 15 0 11 11 135 DAYS WITH PRECIPITATION 20 15 21 14 4 5 11 11 15 0 11 12 139 GREATEST DAILY PRECIPITATION 44.0 56.0 19.0 28.0 3.0 11.0 68.0 25.0 32.0 0.0 103.0 38.0 103.0 DAY 5 19 4 1 4 29 5 30 4 ** 16 23 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 3 1 2 0 0 0 0 0 0 0 0 0 6 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 360 315 45 45 45 45 270 45 45 315 270 45 PREVAILING WIND SPEED(KNOTS) 8.6 8.8 7.2 9.0 7.4 7.5 5.8 6.5 7.1 7.2 7.6 4.9 7.2 PREVAILING WIND PERCENT 45.1 7.1 18.7 16.7 23.9 27.3 15.5 15.5 13.3 16.1 14.7 11.6 12.2 CALMS PERCENT OF WIND 14.4 81.4 58.1 40.0 40.0 42.7 36.8 38.7 42.0 54.2 50.0 61.3 46.4 NO. OF WIND OBSERVATION 153 140 155 150 155 150 155 155 150 155 150 155 1823 VECTOR WIND DIRECTION (MEAN) 276 321 285 7 25 44 352 320 324 37 315 274 328 VECTOR WIND MAGNITUDE(KNOTS) 5.4 1.2 1.5 2.0 2.5 2.5 1.3 1.4 1.5 1.1 1.6 1.4 1.3 WIND STEADINESES (MEAN %) 76.1 85.7 44.1 42.6 62.5 62.5 38.2 35.0 44.1 35.5 53.3 58.3 35.1 WIND SPEED (MEAN KNOTS) 7.1 1.4 3.4 4.7 4.0 4.0 3.4 4.0 3.4 3.1 3.0 2.4 3.7 FASTEST WIND DIRECTION 300 330 180 30 320 30 30 50 90 210 330 320 180 FASTEST WIND SPEED (KNOTS) 20 15 40 25 12 15 12 15 15 15 25 20 40 DAY 4 1 17 20 4 18 18 13 18 29 26 22 DAYS WITH SKY CLEAR (0-2)/8 2 2 2 2 3 16 4 5 3 17 2 9 67 DAYS WITH P.CLOUDY (3-6)/8 5 9 1 6 12 10 9 14 11 12 14 12 115 DAYS WITH CLOUDY (7-8)/8 24 17 28 22 16 4 18 12 16 2 14 10 183 DAYS WITH VISIBILITY =< 2 KM 8 8 4 7 5 1 1 5 0 5 4 4 52 DURATION OF SUNSHINE HOURS 38.0 38.0 14.5 53.3 161.3 240.0 142.3 158.4 124.8 231.3 87.1 111.7 1400.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1024.6 1025.5 1025.8 1015.3 1013.4 1011.2 1011.6 1011.8 1016.5 1020.7 1022.2 1021.2 1018.3 MAX. QFE PRESSURE IN HPA 1040.3 1036.7 1037.1 1028.4 1021.3 1018.7 1018.6 1022.2 1024.1 1027.2 1032.3 1027.9 1040.3 DAY-HOUR 5- 6 20-15 6- 6 25- 6 9- 6 8- 9 15- 6 25- 9 24- 6 12- 6 17- 6 11- 6 MIN. QFE PRESSURE IN HPA 999.5 1012.9 1002.2 998.8 1000.6 1002.3 1001.9 999.4 1004.1 1007.9 1007.7 1008.2 998.8 DAY-HOUR 21-12 12- 3 17- 3 20- 9 22-15 26-15 2-15 15-15 2-15 28-15 3-15 5-12 MEAN QNH PRESSURE IN HPA 1023.5 1024.4 1024.7 1014.1 1012.3 1010.1 1010.5 1010.7 1015.4 1019.6 1021.0 1020.0 1017.2 MAX. QNH PRESSURE IN HPA 1039.2 1035.6 1036.0 1027.3 1020.2 1017.6 1017.5 1021.1 1023.0 1026.1 1031.2 1026.8 1039.2 DAY-HOUR 5- 6 20-15 6- 6 25- 6 9- 6 8- 9 15- 6 25- 9 24- 6 12- 6 17- 6 11- 6 MIN. QNH PRESSURE IN HPA 998.4 1011.8 1001.1 997.7 999.5 1001.2 1000.8 998.3 1003.0 1006.8 1006.6 1007.1 997.7 DAY-HOUR 21-12 12- 3 17- 3 20- 9 22-15 26-15 2-15 15-15 2-15 28-15 3-15 5-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1024.7 1025.3 1025.9 1015.8 1014.2 1012.0 1011.9 1012.3 1016.7 1021.1 1022.2 1021.3 1018.6 MAX. QFE PRESSURE IN HPA 1040.1 1035.8 1036.3 1027.8 1020.9 1018.6 1018.4 1021.2 1023.9 1026.7 1031.0 1027.2 1040.1 DAY 5 3 7 1 9 8 15 25 24 23 17 3 MIN. QFE PRESSURE IN HPA 1003.8 1012.9 1002.2 1000.3 1006.9 1006.0 1003.9 1001.1 1006.7 1010.5 1008.8 1009.9 1000.3 DAY 21 12 17 20 4 24 3 16 2 29 3 6 MEAN QNH PRESSURE IN HPA 1023.6 1024.1 1024.8 1014.7 1013.1 1010.8 1010.8 1011.1 1015.5 1020.0 1021.1 1020.2 1017.5 MAX. QNH PRESSURE IN HPA 1039.0 1034.7 1035.2 1026.7 1019.8 1017.5 1017.3 1020.1 1022.8 1025.6 1029.9 1026.1 1039.0 DAY 5 3 7 1 9 8 15 25 24 23 17 3 MIN. QNH PRESSURE IN HPA 1002.7 1011.8 1001.1 999.2 1005.8 1004.9 1002.8 1000.0 1005.6 1009.4 1007.7 1008.8 999.2 DAY 21 12 17 20 4 24 3 16 2 29 3 6 MEAN QFF PRESSURE IN HPA 1023.9 1024.3 1025.1 1015.0 1013.4 1011.2 1011.1 1011.5 1015.9 1020.3 1021.4 1020.5 1017.8 MAX. QFF PRESSURE IN HPA 1039.2 1034.9 1035.4 1026.9 1020.1 1017.8 1017.6 1020.4 1023.1 1025.9 1030.2 1026.4 1039.2 DAY 5 3 7 1 9 8 15 25 24 23 17 3 MIN. QFF PRESSURE IN HPA 1003.0 1012.0 1001.4 999.5 1006.1 1005.2 1003.1 1000.3 1005.9 1009.7 1008.0 1009.1 999.5 DAY 21 12 17 20 4 24 3 16 2 29 3 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1025.6 1026.4 1026.7 1016.2 1014.5 1012.0 1012.3 1012.5 1017.3 1021.8 1023.1 1022.1 1019.2 MAX. QFE PRESSURE IN HPA 1040.3 1036.0 1037.1 1028.4 1021.3 1018.4 1018.6 1021.8 1024.1 1027.2 1032.3 1027.9 1040.3 DAY 5 3 6 25 9 8 15 25 24 12 17 11 MIN. QFE PRESSURE IN HPA 1003.3 1014.4 1003.0 1000.4 1007.5 1005.6 1004.4 1002.2 1006.7 1011.4 1010.3 1011.7 1000.4 DAY 21 12 17 20 22 24 3 16 2 28 3 6 MEAN QNH PRESSURE IN HPA 1024.4 1025.3 1025.6 1015.0 1013.4 1010.9 1011.1 1011.4 1016.2 1020.6 1022.0 1021.0 1018.1 MAX. QNH PRESSURE IN HPA 1039.2 1034.9 1036.0 1027.3 1020.2 1017.3 1017.5 1020.7 1023.0 1026.1 1031.2 1026.8 1039.2 DAY 5 3 6 25 9 8 15 25 24 12 17 11 MIN. QNH PRESSURE IN HPA 1002.2 1013.3 1001.9 999.3 1006.4 1004.5 1003.3 1001.1 1005.6 1010.3 1009.2 1010.6 999.3 DAY 21 12 17 20 22 24 3 16 2 28 3 6 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 1025.7 1026.2 1026.3 1015.8 1013.8 1011.6 1012.0 1012.3 1017.1 1021.4 1022.8 1022.0 1018.9 MAX. QFE PRESSURE IN HPA 1039.7 1036.4 1037.1 1028.3 1020.8 1018.7 1018.6 1022.2 1023.8 1027.0 1031.3 1027.3 1039.7 DAY 5 20 6 25 9 8 15 25 24 14 16 11 MIN. QFE PRESSURE IN HPA 1002.9 1014.9 1003.0 998.8 1005.6 1005.4 1004.5 1002.6 1006.2 1010.4 1009.8 1011.3 998.8 DAY 21 12 17 20 22 24 4 16 2 28 3 5 MEAN QNH PRESSURE IN HPA 1024.5 1025.1 1025.2 1014.7 1012.6 1010.5 1010.9 1011.2 1016.0 1020.2 1021.7 1020.9 1017.8 MAX. QNH PRESSURE IN HPA 1038.6 1035.3 1036.0 1027.2 1019.7 1017.6 1017.5 1021.1 1022.7 1025.9 1030.2 1026.2 1038.6 DAY 5 20 6 25 9 8 15 25 24 14 16 11 MIN. QNH PRESSURE IN HPA 1001.8 1013.8 1001.9 997.7 1004.5 1004.3 1003.4 1001.5 1005.1 1009.3 1008.7 1010.2 997.7 DAY 21 12 17 20 22 24 4 16 2 28 3 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1023.5 1024.8 1025.1 1014.3 1012.5 1010.6 1011.2 1011.2 1015.9 1019.7 1021.3 1020.1 1017.5 MAX. QFE PRESSURE IN HPA 1037.4 1035.5 1035.2 1027.5 1018.7 1017.6 1016.8 1021.6 1023.6 1025.4 1029.7 1026.4 1037.4 DAY 5 20 6 1 1 8 15 25 23 13 16 2 MIN. QFE PRESSURE IN HPA 999.5 1014.1 1003.0 998.8 1001.1 1003.7 1002.9 999.9 1004.5 1008.6 1008.2 1008.2 998.8 DAY 21 8 17 20 22 26 2 15 2 28 3 5 MEAN QNH PRESSURE IN HPA 1022.3 1023.7 1023.9 1013.2 1011.4 1009.4 1010.0 1010.1 1014.8 1018.6 1020.1 1018.9 1016.4 MAX. QNH PRESSURE IN HPA 1036.3 1034.4 1034.1 1026.4 1017.6 1016.5 1015.7 1020.5 1022.5 1024.3 1028.6 1025.3 1036.3 DAY 5 20 6 1 1 8 15 25 23 13 16 2 MIN. QNH PRESSURE IN HPA 998.4 1013.0 1001.9 997.7 1000.0 1002.6 1001.8 998.8 1003.4 1007.5 1007.1 1007.1 997.7 DAY 21 8 17 20 22 26 2 15 2 28 3 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1023.7 1025.0 1025.2 1014.2 1012.2 1010.1 1010.8 1010.9 1015.8 1019.8 1021.5 1020.4 1017.5 MAX. QFE PRESSURE IN HPA 1037.8 1036.7 1035.6 1027.3 1018.7 1017.5 1016.0 1021.9 1023.6 1025.8 1030.9 1026.4 1037.8 DAY 5 20 6 1 6 7 30 25 23 13 16 2 MIN. QFE PRESSURE IN HPA 1000.3 1014.9 1003.0 1000.5 1000.6 1002.3 1001.9 999.4 1004.1 1007.9 1007.7 1008.4 999.4 DAY 21 8 17 20 22 26 2 15 2 28 3 5 MEAN QNH PRESSURE IN HPA 1022.6 1023.8 1024.1 1013.1 1011.1 1009.0 1009.6 1009.8 1014.6 1018.6 1020.3 1019.2 1016.3 MAX. QNH PRESSURE IN HPA 1036.7 1035.6 1034.5 1026.2 1017.6 1016.4 1014.9 1020.8 1022.5 1024.7 1029.8 1025.3 1036.7 DAY 5 20 6 1 6 7 30 25 23 13 16 2 MIN. QNH PRESSURE IN HPA 999.2 1013.8 1001.9 999.4 999.5 1001.2 1000.8 998.3 1003.0 1006.8 1006.6 1007.3 998.3 DAY 21 8 17 20 22 26 2 15 2 28 3 5 MEAN QFF PRESSURE IN HPA 1022.8 1024.1 1024.4 1013.4 1011.4 1009.3 1010.0 1010.1 1015.0 1019.0 1020.6 1019.5 1016.6 MAX. QFF PRESSURE IN HPA 1036.9 1035.8 1034.7 1026.4 1017.9 1016.7 1015.2 1021.1 1022.8 1025.0 1030.1 1025.6 1036.9 DAY 5 20 6 1 6 7 30 25 23 13 16 2 MIN. QFF PRESSURE IN HPA 999.5 1014.0 1002.2 999.7 999.8 1001.5 1001.1 998.6 1003.3 1007.1 1006.9 1007.6 998.6 DAY 21 8 17 20 22 26 2 15 2 28 3 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.2 7.6 10.9 17.0 21.9 26.1 28.8 26.1 22.6 17.6 11.4 8.4 17.2 MINIMUN AIR TEMPERATURE (C) 2.5 3.7 4.3 8.7 15.6 19.7 20.8 19.4 18.1 12.2 6.2 2.7 11.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 9 14 11 4 0 0 0 38 DAYS WITH MINIMUM TEMP. <=-4 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 9 4 5 0 0 0 0 0 0 0 0 11 29 TEMPERATURE RECORDS LOWEST(C) -4.0 -2.0 -1.0 3.0 11.0 15.0 19.0 15.0 14.0 6.0 1.0 -2.0 -4.0 DAY 14 12 3 5 7 4 15 18 24 31 15 15 MAXIMUM AIR TEMPERATURE (C) 11.9 10.8 16.1 21.5 25.6 29.8 32.9 30.2 25.7 20.4 14.9 12.4 21.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 2 2 4 21 31 24 9 0 1 0 94 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 20.0 33.0 31.0 32.0 33.0 35.0 34.0 33.0 27.0 31.0 25.0 35.0 DAY 8 9 23 28 29 23 4 7 1 8 22 21 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 7.1 11.8 12.8 10.0 10.1 12.1 10.8 7.6 8.2 8.7 9.7 9.8 MEAN DAILY TEMP. (MDT) (C) 7.2 7.2 10.2 15.1 20.6 24.8 26.8 24.8 21.9 16.3 10.5 7.5 16.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.5 25.0 114.5 181.0 126.0 56.5 0.0 0.0 0.0 504.5 HEATING DEG. DAYS(BASE 18 0C) 333.5 301.0 249.0 96.0 4.5 0.0 0.0 1.0 5.0 60.0 224.0 325.0 1599.0 DEWPOINT (MEAN C) 4.3 3.6 5.3 12.3 17.7 19.2 19.4 20.0 19.3 14.8 8.8 4.1 12.4 MIXING RATIO (G/KG) 5.23 4.98 5.64 8.97 12.80 14.17 14.42 14.92 14.22 10.54 7.08 5.15 9.84 VAPOUR PRESSURE (HPA) 8.52 8.10 9.15 14.46 20.43 22.49 22.82 23.65 22.67 16.98 11.52 8.40 15.77 SATURATION DEF. (HPA) 2.86 2.68 5.12 5.71 6.45 12.10 17.57 11.40 5.59 3.57 2.55 3.15 6.56 RELATIVE HUMIDITY (MEAN %) 82 81 75 77 79 68 59 72 84 84 87 79 77 RELATIVE HUMIDITY (MAX. %) 93 95 95 96 96 89 86 93 96 96 97 92 94 RELATIVE HUMIDITY (MIN. %) 69 68 54 59 64 54 44 58 73 73 75 65 63 RELATIVE HUMIDITY (MEAN% 03UTC) 92 94 94 95 96 89 86 93 95 96 96 90 93 RELATIVE HUMIDITY (MEAN% 09UTC) 79 78 70 70 69 59 47 62 78 77 80 74 70 RELATIVE HUMIDITY (MEAN% 15UTC) 78 77 69 69 78 63 54 67 81 84 89 79 74 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 94.0 115.0 84.0 37.0 55.6 25.0 0.0 98.6 263.2 247.0 315.2 265.0 1599.6 DAYS WITH PRECIPITATION >=10 3 5 4 2 1 0 0 2 8 5 6 7 43 DAYS WITH PRECIPITATION >= 5 8 7 6 2 5 4 0 4 9 6 8 10 69 DAYS WITH PRECIPITATION >= 1 13 13 9 6 10 4 0 5 14 13 14 11 112 DAYS WITH PRECIPITATION 13 13 9 6 11 4 0 5 14 13 14 11 113 GREATEST DAILY PRECIPITATION 26.0 30.0 28.0 17.0 20.0 9.0 0.0 61.0 62.0 80.0 76.0 64.0 80.0 DAY 25 3 16 24 6 3 ** 16 27 15 29 3 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 2 2 0 0 0 0 0 0 0 0 0 4 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 315 315 45 45 45 45 45 45 45 270 270 270 45 PREVAILING WIND SPEED(KNOTS) 8.6 10.7 9.5 9.8 8.1 5.8 7.0 7.4 6.2 9.2 6.9 9.7 7.8 PREVAILING WIND PERCENT 9.7 21.4 13.5 21.3 28.4 16.7 17.4 17.4 12.0 11.6 15.3 13.5 12.5 CALMS PERCENT OF WIND 63.9 21.4 31.0 44.7 33.5 40.0 51.0 49.0 41.3 63.2 63.3 65.2 47.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 254 275 315 7 22 350 2 356 331 303 293 247 322 VECTOR WIND MAGNITUDE(KNOTS) 1.2 3.5 0.7 2.0 2.7 1.2 1.8 1.6 1.1 1.1 1.2 1.8 1.1 WIND STEADINESES (MEAN %) 36.4 43.8 10.9 45.5 55.1 37.5 62.1 51.6 32.4 45.8 42.9 52.9 27.5 WIND SPEED (MEAN KNOTS) 3.3 8.0 6.4 4.4 4.9 3.2 2.9 3.1 3.4 2.4 2.8 3.4 4.0 FASTEST WIND DIRECTION 210 180 210 60 30 30 300 50 360 290 120 180 180 FASTEST WIND SPEED (KNOTS) 25 35 25 20 15 20 10 14 12 15 25 20 35 DAY 9 9 24 28 16 1 1 16 13 14 21 21 DAYS WITH SKY CLEAR (0-2)/8 4 5 7 11 9 13 25 16 7 5 4 6 112 DAYS WITH P.CLOUDY (3-6)/8 12 4 11 4 6 9 6 9 5 8 5 8 87 DAYS WITH CLOUDY (7-8)/8 15 19 13 15 16 8 0 6 18 18 21 17 166 DAYS WITH VISIBILITY =< 2 KM 2 2 5 9 3 1 0 1 2 2 9 9 45 DURATION OF SUNSHINE HOURS 89.5 79.0 114.7 135.5 188.5 225.5 298.6 223.5 113.5 83.3 60.2 80.0 1691.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1023.5 1020.8 1019.3 1018.2 1014.2 1010.4 1008.0 1010.9 1015.8 1020.1 1024.6 1022.9 1017.4 MAX. QFE PRESSURE IN HPA 1044.0 1034.3 1031.6 1030.4 1020.9 1020.0 1016.8 1024.3 1029.3 1032.3 1043.4 1037.2 1044.0 DAY-HOUR 14- 6 19- 6 16- 6 3- 3 3- 6 17- 3 14- 3 18- 6 18- 9 23- 6 14- 6 4- 6 MIN. QFE PRESSURE IN HPA 1010.1 1002.9 997.4 1004.8 1008.6 1000.2 999.6 1000.0 1003.5 1003.5 1012.8 1005.9 997.4 DAY-HOUR 8-15 10- 9 27-12 30-15 1- 3 23-15 1-15 10-15 9-12 9-15 26-12 23- 3 MEAN QNH PRESSURE IN HPA 1022.4 1019.7 1018.2 1017.1 1013.0 1009.2 1006.9 1009.8 1014.7 1018.9 1023.5 1021.8 1016.3 MAX. QNH PRESSURE IN HPA 1042.9 1033.2 1030.5 1029.3 1019.8 1018.9 1015.7 1023.2 1028.2 1031.2 1042.3 1036.1 1042.9 DAY-HOUR 14- 6 19- 6 16- 6 3- 3 3- 6 17- 3 14- 3 18- 6 18- 9 23- 6 14- 6 4- 6 MIN. QNH PRESSURE IN HPA 1009.0 1001.8 996.3 1003.7 1007.5 999.1 998.5 998.9 1002.4 1002.4 1011.7 1004.8 996.3 DAY-HOUR 8-15 10- 9 27-12 30-15 1- 3 23-15 1-15 10-15 9-12 9-15 26-12 23- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1023.5 1021.4 1019.8 1018.5 1014.5 1010.8 1008.8 1011.5 1016.2 1020.3 1024.9 1023.0 1017.8 MAX. QFE PRESSURE IN HPA 1042.5 1033.7 1031.3 1030.4 1020.7 1020.0 1016.8 1023.7 1027.5 1030.2 1042.7 1036.7 1042.7 DAY 14 19 16 3 3 17 14 18 18 17 14 4 MIN. QFE PRESSURE IN HPA 1011.0 1003.4 998.8 1007.4 1008.6 1004.2 1001.5 1003.4 1006.9 1008.1 1013.3 1005.9 998.8 DAY 9 10 27 27 1 24 5 15 9 9 26 23 MEAN QNH PRESSURE IN HPA 1022.4 1020.2 1018.7 1017.3 1013.4 1009.7 1007.7 1010.4 1015.1 1019.2 1023.8 1021.8 1016.6 MAX. QNH PRESSURE IN HPA 1041.4 1032.6 1030.2 1029.3 1019.6 1018.9 1015.7 1022.6 1026.4 1029.1 1041.6 1035.6 1041.6 DAY 14 19 16 3 3 17 14 18 18 17 14 4 MIN. QNH PRESSURE IN HPA 1009.9 1002.3 997.7 1006.3 1007.5 1003.1 1000.4 1002.3 1005.8 1007.0 1012.2 1004.8 997.7 DAY 9 10 27 27 1 24 5 15 9 9 26 23 MEAN QFF PRESSURE IN HPA 1022.6 1020.5 1019.0 1017.6 1013.7 1010.1 1008.0 1010.7 1015.4 1019.5 1024.1 1022.1 1016.9 MAX. QFF PRESSURE IN HPA 1041.6 1032.8 1030.4 1029.6 1019.9 1019.2 1016.0 1022.9 1026.7 1029.4 1041.8 1035.8 1041.8 DAY 14 19 16 3 3 17 14 18 18 17 14 4 MIN. QFF PRESSURE IN HPA 1010.2 1002.6 998.0 1006.6 1007.8 1003.4 1000.7 1002.6 1006.1 1007.3 1012.5 1005.1 998.0 DAY 9 10 27 27 1 24 5 15 9 9 26 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1024.5 1022.0 1020.4 1019.2 1014.9 1011.0 1009.0 1012.0 1016.6 1021.2 1025.5 1023.6 1018.3 MAX. QFE PRESSURE IN HPA 1044.0 1034.3 1031.6 1030.0 1020.9 1020.0 1016.8 1024.3 1028.6 1032.3 1043.4 1037.2 1044.0 DAY 14 19 16 1 3 17 14 18 18 23 14 4 MIN. QFE PRESSURE IN HPA 1012.4 1004.0 999.3 1007.6 1010.0 1004.4 1001.1 1003.3 1006.4 1007.8 1014.4 1007.0 999.3 DAY 9 10 27 30 1 24 5 10 9 9 26 23 MEAN QNH PRESSURE IN HPA 1023.4 1020.9 1019.2 1018.0 1013.7 1009.9 1007.9 1010.9 1015.5 1020.0 1024.4 1022.4 1017.2 MAX. QNH PRESSURE IN HPA 1042.9 1033.2 1030.5 1028.9 1019.8 1018.9 1015.7 1023.2 1027.5 1031.2 1042.3 1036.1 1042.9 DAY 14 19 16 1 3 17 14 18 18 23 14 4 MIN. QNH PRESSURE IN HPA 1011.3 1002.9 998.2 1006.5 1008.9 1003.3 1000.0 1002.2 1005.3 1006.7 1013.3 1005.9 998.2 DAY 9 10 27 30 1 24 5 10 9 9 26 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1024.3 1021.5 1019.9 1018.9 1014.6 1010.7 1008.3 1011.3 1016.1 1020.4 1024.7 1023.4 1017.9 MAX. QFE PRESSURE IN HPA 1043.7 1033.7 1031.3 1030.1 1020.8 1019.1 1015.8 1023.4 1029.3 1031.6 1042.9 1036.9 1043.7 DAY 14 17 16 1 3 17 13 18 18 23 14 4 MIN. QFE PRESSURE IN HPA 1012.1 1002.9 998.9 1009.4 1010.2 1004.4 1000.5 1003.3 1004.9 1007.4 1013.4 1008.3 998.9 DAY 9 10 27 27 16 23 5 10 9 9 26 27 MEAN QNH PRESSURE IN HPA 1023.2 1020.4 1018.8 1017.7 1013.5 1009.6 1007.2 1010.2 1014.9 1019.3 1023.6 1022.2 1016.7 MAX. QNH PRESSURE IN HPA 1042.6 1032.6 1030.2 1029.0 1019.7 1018.0 1014.7 1022.3 1028.2 1030.5 1041.8 1035.8 1042.6 DAY 14 17 16 1 3 17 13 18 18 23 14 4 MIN. QNH PRESSURE IN HPA 1011.0 1001.8 997.8 1008.3 1009.1 1003.3 999.4 1002.2 1003.8 1006.3 1012.3 1007.2 997.8 DAY 9 10 27 27 16 23 5 10 9 9 26 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1022.7 1019.6 1018.2 1017.4 1013.6 1009.9 1007.2 1010.1 1015.1 1019.2 1023.8 1022.3 1016.6 MAX. QFE PRESSURE IN HPA 1041.8 1031.6 1030.1 1028.4 1018.3 1018.1 1015.8 1022.8 1028.4 1030.8 1040.6 1035.5 1041.8 DAY 14 24 7 3 19 17 13 17 18 17 14 3 MIN. QFE PRESSURE IN HPA 1010.3 1003.2 997.4 1005.2 1009.3 1001.5 999.8 1001.2 1003.5 1004.1 1012.8 1007.0 997.4 DAY 8 10 27 30 16 23 5 10 9 9 26 27 MEAN QNH PRESSURE IN HPA 1021.5 1018.5 1017.1 1016.3 1012.5 1008.8 1006.1 1009.0 1014.0 1018.1 1022.6 1021.2 1015.5 MAX. QNH PRESSURE IN HPA 1040.7 1030.5 1029.0 1027.3 1017.2 1017.0 1014.7 1021.7 1027.3 1029.7 1039.5 1034.4 1040.7 DAY 14 24 7 3 19 17 13 17 18 17 14 3 MIN. QNH PRESSURE IN HPA 1009.2 1002.1 996.3 1004.1 1008.2 1000.4 998.7 1000.1 1002.4 1003.0 1011.7 1005.9 996.3 DAY 8 10 27 30 16 23 5 10 9 9 26 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1022.7 1019.6 1018.2 1017.1 1013.3 1009.4 1006.7 1009.7 1015.1 1019.3 1024.2 1022.6 1016.5 MAX. QFE PRESSURE IN HPA 1041.8 1031.6 1030.2 1028.1 1017.9 1017.8 1015.6 1023.1 1028.2 1031.7 1040.6 1035.9 1041.8 DAY 14 24 15 3 19 17 13 17 18 17 14 3 MIN. QFE PRESSURE IN HPA 1010.1 1003.2 997.8 1004.8 1008.8 1000.2 999.6 1000.0 1003.5 1003.5 1013.7 1008.1 997.8 DAY 8 10 27 30 16 23 1 10 9 9 22 27 MEAN QNH PRESSURE IN HPA 1021.6 1018.5 1017.1 1016.0 1012.2 1008.3 1005.6 1008.6 1014.0 1018.2 1023.1 1021.4 1015.4 MAX. QNH PRESSURE IN HPA 1040.7 1030.5 1029.1 1027.0 1016.8 1016.7 1014.5 1022.0 1027.1 1030.6 1039.5 1034.8 1040.7 DAY 14 24 15 3 19 17 13 17 18 17 14 3 MIN. QNH PRESSURE IN HPA 1009.0 1002.1 996.7 1003.7 1007.7 999.1 998.5 998.9 1002.4 1002.4 1012.6 1007.0 996.7 DAY 8 10 27 30 16 23 1 10 9 9 22 27 MEAN QFF PRESSURE IN HPA 1021.9 1018.8 1017.4 1016.3 1012.5 1008.6 1005.9 1009.0 1014.3 1018.5 1023.4 1021.7 1015.7 MAX. QFF PRESSURE IN HPA 1040.9 1030.7 1029.3 1027.3 1017.1 1017.0 1014.8 1022.3 1027.4 1030.9 1039.7 1035.0 1040.9 DAY 14 24 15 3 19 17 13 17 18 17 14 3 MIN. QFF PRESSURE IN HPA 1009.3 1002.4 997.0 1004.0 1008.0 999.4 998.8 999.2 1002.7 1002.7 1012.9 1007.3 997.0 DAY 8 10 27 30 16 23 1 10 9 9 22 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.0 3.3 6.2 15.5 18.4 23.5 24.3 26.4 22.5 16.8 13.6 8.9 15.7 MINIMUN AIR TEMPERATURE (C) 3.0 0.7 3.6 10.1 14.9 19.1 19.7 20.9 19.0 12.9 8.4 4.6 11.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 7 13 22 9 0 0 0 51 DAYS WITH MINIMUM TEMP. <=-4 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 8 15 6 0 0 0 0 0 0 0 0 2 31 TEMPERATURE RECORDS LOWEST(C) -3.0 -11.0 -2.0 3.0 10.0 16.0 15.0 17.0 15.0 8.0 2.0 0.0 -11.0 DAY 16 17 2 3 8 2 22 30 26 30 30 25 MAXIMUM AIR TEMPERATURE (C) 13.6 6.9 9.7 21.1 22.5 28.3 29.7 32.4 26.4 20.0 17.2 12.3 20.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 0 9 19 30 7 0 2 0 70 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 13.0 16.0 34.0 28.0 35.0 35.0 35.0 34.0 26.0 30.0 28.0 35.0 DAY 29 8 4 13 18 10 30 8 20 1 25 4 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 6.2 6.1 11.0 7.6 9.2 10.0 11.5 7.4 7.1 8.8 7.7 8.6 MEAN DAILY TEMP. (MDT) (C) 8.3 3.8 6.6 15.6 18.7 23.7 24.7 26.6 22.7 16.4 12.8 8.5 15.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.0 3.0 83.5 119.5 174.5 60.0 1.0 2.0 0.0 445.5 HEATING DEG. DAYS(BASE 18 0C) 301.5 412.5 342.5 87.0 15.0 0.0 0.0 0.0 0.0 70.0 161.0 296.0 1685.5 DEWPOINT (MEAN C) 4.1 1.5 3.6 9.9 14.8 18.4 19.9 21.6 19.6 14.0 9.0 6.6 11.9 MIXING RATIO (G/KG) 5.19 4.25 4.95 7.67 10.60 13.37 14.81 16.36 14.37 10.07 7.20 6.09 9.58 VAPOUR PRESSURE (HPA) 8.41 6.95 8.08 12.37 16.99 21.32 23.44 25.87 22.91 16.22 11.73 9.92 15.35 SATURATION DEF. (HPA) 3.60 1.02 1.60 6.43 4.47 8.09 7.73 9.23 4.75 3.50 4.54 1.87 4.74 RELATIVE HUMIDITY (MEAN %) 76 89 86 73 81 75 78 76 85 85 78 87 81 RELATIVE HUMIDITY (MAX. %) 93 97 96 89 94 91 93 93 96 95 90 95 94 RELATIVE HUMIDITY (MIN. %) 59 76 72 55 64 58 61 57 69 74 67 77 66 RELATIVE HUMIDITY (MEAN% 03UTC) 87 93 93 89 92 90 93 91 94 94 89 94 92 RELATIVE HUMIDITY (MEAN% 09UTC) 73 83 77 61 70 62 67 61 75 80 71 85 72 RELATIVE HUMIDITY (MEAN% 15UTC) 72 86 82 67 76 66 69 66 81 83 79 88 76 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 68.0 156.0 169.2 20.4 77.9 9.0 212.4 0.0 155.6 233.0 279.0 198.8 1579.3 DAYS WITH PRECIPITATION >=10 3 6 6 0 2 0 4 0 4 6 5 5 41 DAYS WITH PRECIPITATION >= 5 5 8 10 1 5 1 4 0 8 11 7 8 68 DAYS WITH PRECIPITATION >= 1 8 14 14 8 8 2 6 0 12 15 9 15 111 DAYS WITH PRECIPITATION 8 15 17 9 10 2 7 0 13 15 9 17 122 GREATEST DAILY PRECIPITATION 22.0 38.0 50.0 7.4 27.0 7.0 98.0 0.0 49.0 56.0 140.0 42.0 140.0 DAY 22 16 2 25 7 12 4 ** 10 30 29 31 DAY WITH THUNDER STORM 0 0 0 0 2 0 0 0 1 0 0 0 3 DAYS WITH SNOW OR SLEET 0 9 4 0 0 0 0 0 0 0 0 0 13 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 315 270 315 45 315 45 45 45 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 9.8 7.7 9.6 7.7 7.1 7.7 5.9 6.5 6.3 7.3 8.4 5.6 7.0 PREVAILING WIND PERCENT 10.8 26.0 17.2 13.6 6.5 5.0 6.9 7.7 11.7 16.7 8.0 20.0 9.4 CALMS PERCENT OF WIND 65.2 46.8 57.4 60.5 74.6 82.5 77.0 73.8 69.6 51.8 72.0 68.4 67.1 NO. OF WIND OBSERVATION 158 231 244 177 248 240 248 248 240 168 150 155 2507 VECTOR WIND DIRECTION (MEAN) 256 291 316 39 350 6 323 344 313 311 259 279 304 VECTOR WIND MAGNITUDE(KNOTS) 1.6 3.5 1.7 1.5 0.4 0.4 0.7 1.0 0.8 1.5 1.6 1.3 1.0 WIND STEADINESES (MEAN %) 48.5 81.4 50.0 46.9 26.7 30.8 46.7 58.8 40.0 45.5 57.1 76.5 40.0 WIND SPEED (MEAN KNOTS) 3.3 4.3 3.4 3.2 1.5 1.3 1.5 1.7 2.0 3.3 2.8 1.7 2.5 FASTEST WIND DIRECTION 210 310 310 210 310 220 320 330 330 50 180 210 210 FASTEST WIND SPEED (KNOTS) 30 20 20 15 16 10 16 15 12 14 30 10 30 DAY 5 29 1 13 21 10 4 1 10 18 25 4 DAYS WITH SKY CLEAR (0-2)/8 13 4 2 2 2 8 12 12 1 2 8 5 71 DAYS WITH P.CLOUDY (3-6)/8 9 3 4 12 12 15 11 15 9 9 7 7 113 DAYS WITH CLOUDY (7-8)/8 9 22 25 16 17 7 8 4 20 20 15 19 182 DAYS WITH VISIBILITY =< 2 KM 9 15 12 3 2 0 5 1 7 12 9 10 85 DURATION OF SUNSHINE HOURS 142.8 49.9 41.6 97.8 92.7 186.1 186.0 221.3 77.0 72.1 ****** 56.9 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1016.6 1025.0 1023.2 1016.8 1015.2 1013.5 1008.9 1009.9 1015.0 1019.6 1025.6 1024.1 1017.8 MAX. QFE PRESSURE IN HPA 1034.8 1039.5 1036.0 1031.2 1024.6 1022.2 1017.0 1016.1 1024.8 1036.5 1036.3 1040.9 1040.9 DAY-HOUR 9- 6 25- 9 8- 9 2-21 3-21 13- 6 6- 6 11- 6 28-18 31- 6 11- 6 18- 9 MIN. QFE PRESSURE IN HPA 1005.7 1009.7 1005.6 1001.0 1001.6 998.3 1000.8 1003.8 1004.4 1008.2 1007.6 1005.5 998.3 DAY-HOUR 6- 6 5- 3 13-15 17- 9 20-12 10-12 11-12 22-15 20-12 15-15 25- 3 10-15 MEAN QNH PRESSURE IN HPA 1015.5 1023.8 1022.1 1015.7 1014.1 1012.4 1007.7 1008.8 1013.9 1018.5 1024.4 1023.0 1016.7 MAX. QNH PRESSURE IN HPA 1033.7 1038.4 1034.9 1030.1 1023.5 1021.1 1015.9 1015.0 1023.7 1035.4 1035.2 1039.8 1039.8 DAY-HOUR 9- 6 25- 9 8- 9 2-21 3-21 13- 6 6- 6 11- 6 28-18 31- 6 11- 6 18- 9 MIN. QNH PRESSURE IN HPA 1004.6 1008.6 1004.5 999.9 1000.5 997.2 999.7 1002.7 1003.3 1007.1 1006.5 1004.4 997.2 DAY-HOUR 6- 6 5- 3 13-15 17- 9 20-12 10-12 11-12 22-15 20-12 15-15 25- 3 10-15 MEAN QFF PRESSURE IN HPA ****** 1024.2 1022.5 ****** 1014.4 1012.7 1008.1 1009.1 1014.2 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1038.6 1035.1 ****** 1023.8 1021.4 1016.2 1015.3 1024.0 ****** ****** ****** ****** DAY-HOUR **-** 25- 9 8- 9 **-** 3-21 13- 6 6- 6 11- 6 28-21 **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** 1008.8 1004.8 ****** 1000.8 997.5 1000.0 1003.0 1003.6 ****** ****** ****** ****** DAY-HOUR **-** 5- 3 13-15 **-** 20-12 10-12 11-12 22-15 20-15 **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** 1025.0 1023.0 ****** 1015.3 1013.6 1009.1 1009.8 1015.0 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** 1037.7 1034.7 ****** 1024.6 1021.7 1015.1 1015.4 1023.6 ****** ****** ****** ****** DAY ** 25 26 ** 4 13 5 12 13 ** ** ** MIN. QFE PRESSURE IN HPA ****** 1010.0 1007.2 ****** 1003.3 1004.4 1001.1 1005.0 1006.8 ****** ****** ****** ****** DAY ** 5 14 ** 21 10 11 22 8 ** ** ** MEAN QNH PRESSURE IN HPA ****** 1023.8 1021.9 ****** 1014.1 1012.5 1008.0 1008.6 1013.8 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** 1036.6 1033.6 ****** 1023.5 1020.6 1014.0 1014.3 1022.5 ****** ****** ****** ****** DAY ** 25 26 ** 4 13 5 12 13 ** ** ** MIN. QNH PRESSURE IN HPA ****** 1008.9 1006.1 ****** 1002.2 1003.3 1000.0 1003.9 1005.7 ****** ****** ****** ****** DAY ** 5 14 ** 21 10 11 22 8 ** ** ** MEAN QFF PRESSURE IN HPA ****** 1024.1 1022.2 ****** 1014.4 1012.8 1008.3 1009.0 1014.1 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1036.8 1033.8 ****** 1023.8 1020.9 1014.3 1014.6 1022.8 ****** ****** ****** ****** DAY ** 25 26 ** 4 13 5 12 13 ** ** ** MIN. QFF PRESSURE IN HPA ****** 1009.2 1006.3 ****** 1002.5 1003.6 1000.3 1004.2 1006.0 ****** ****** ****** ****** DAY ** 5 14 ** 21 10 11 22 8 ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 1017.2 1024.9 1023.4 1016.4 1015.1 1014.2 1009.4 1010.4 1015.1 1019.5 1025.9 1024.0 1018.0 MAX. QFE PRESSURE IN HPA 1033.5 1038.0 1034.2 1029.2 1022.4 1021.7 1016.1 1015.6 1023.6 1035.8 1035.1 1039.4 1039.4 DAY 9 25 26 3 4 13 5 11 13 31 11 18 MIN. QFE PRESSURE IN HPA 1007.5 1009.7 1009.6 1002.0 1002.4 1004.4 1001.4 1004.4 1007.9 1009.5 1007.6 1007.3 1001.4 DAY 6 5 13 17 21 10 11 21 20 16 25 10 MEAN QNH PRESSURE IN HPA 1016.0 1023.7 1022.2 1015.3 1014.0 1013.1 1008.3 1009.3 1014.0 1018.4 1024.7 1022.9 1016.8 MAX. QNH PRESSURE IN HPA 1032.4 1036.9 1033.1 1028.1 1021.3 1020.6 1015.0 1014.5 1022.5 1034.7 1034.0 1038.3 1038.3 DAY 9 25 26 3 4 13 5 11 13 31 11 18 MIN. QNH PRESSURE IN HPA 1006.4 1008.6 1008.5 1000.9 1001.3 1003.3 1000.3 1003.3 1006.8 1008.4 1006.5 1006.2 1000.3 DAY 6 5 13 17 21 10 11 21 20 16 25 10 MEAN QFF PRESSURE IN HPA 1016.3 1024.0 1022.5 1015.6 1014.3 1013.4 1008.6 1009.6 1014.3 1018.7 1025.0 1023.2 1017.1 MAX. QFF PRESSURE IN HPA 1032.6 1037.1 1033.3 1028.3 1021.6 1020.9 1015.3 1014.8 1022.8 1034.9 1034.2 1038.5 1038.5 DAY 9 25 26 3 4 13 5 11 13 31 13 18 MIN. QFF PRESSURE IN HPA 1006.7 1008.8 1008.7 1001.2 1001.6 1003.6 1000.6 1003.6 1007.1 1008.7 1006.8 1006.5 1000.6 DAY 6 5 13 17 21 10 11 21 20 16 25 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1017.9 1025.7 1024.0 1017.1 1015.9 1014.5 1009.8 1011.3 1016.0 1020.4 1026.6 1025.0 1018.7 MAX. QFE PRESSURE IN HPA 1034.8 1039.2 1035.4 1029.8 1023.8 1022.2 1017.0 1016.1 1024.0 1036.5 1036.3 1040.2 1040.2 DAY 9 25 8 2 3 13 6 11 11 31 11 18 MIN. QFE PRESSURE IN HPA 1005.7 1011.4 1009.2 1003.8 1003.6 1002.1 1001.9 1005.1 1008.7 1010.6 1008.0 1007.8 1001.9 DAY 6 5 13 17 21 10 11 22 20 15 25 10 MEAN QNH PRESSURE IN HPA 1016.8 1024.6 1022.9 1015.9 1014.8 1013.3 1008.7 1010.2 1014.8 1019.3 1025.5 1023.8 1017.6 MAX. QNH PRESSURE IN HPA 1033.7 1038.1 1034.3 1028.7 1022.7 1021.1 1015.9 1015.0 1022.9 1035.4 1035.2 1039.1 1039.1 DAY 9 25 8 2 3 13 6 11 11 31 11 18 MIN. QNH PRESSURE IN HPA 1004.6 1010.3 1008.1 1002.7 1002.5 1001.0 1000.8 1004.0 1007.6 1009.5 1006.9 1006.7 1000.8 DAY 6 5 13 17 21 10 11 22 20 15 25 10 MEAN QFF PRESSURE IN HPA ****** 1025.2 1023.4 ****** 1015.1 1013.7 1009.0 1010.5 1015.2 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1038.3 1034.5 ****** 1023.0 1021.4 1016.2 1015.3 1023.2 ****** ****** ****** ****** DAY ** 25 8 ** 3 13 6 11 11 ** ** ** MIN. QFF PRESSURE IN HPA ****** 1010.5 1008.3 ****** 1002.8 1001.3 1001.1 1004.3 1007.9 ****** ****** ****** ****** DAY ** 5 13 ** 21 10 11 22 20 ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1017.3 1025.5 1023.5 1016.3 1015.5 1013.8 1009.2 1010.5 1015.3 1020.0 1025.9 1024.6 1018.1 MAX. QFE PRESSURE IN HPA 1032.9 1039.5 1036.0 1029.4 1023.9 1021.1 1016.6 1014.8 1024.0 1036.5 1036.3 1040.9 1040.9 DAY 9 25 8 2 3 13 6 11 11 31 11 18 MIN. QFE PRESSURE IN HPA 1006.1 1011.8 1007.8 1001.0 1003.6 1000.0 1001.0 1004.5 1006.7 1009.0 1008.9 1007.3 1000.0 DAY 6 8 13 17 20 10 11 23 20 15 25 10 MEAN QNH PRESSURE IN HPA 1016.2 1024.3 1022.4 1015.2 1014.4 1012.7 1008.1 1009.4 1014.2 1018.9 1024.7 1023.5 1017.0 MAX. QNH PRESSURE IN HPA 1031.8 1038.4 1034.9 1028.3 1022.8 1020.0 1015.5 1013.7 1022.9 1035.4 1035.2 1039.8 1039.8 DAY 9 25 8 2 3 13 6 11 11 31 11 18 MIN. QNH PRESSURE IN HPA 1005.0 1010.7 1006.7 999.9 1002.5 998.9 999.9 1003.4 1005.6 1007.9 1007.8 1006.2 998.9 DAY 6 8 13 17 20 10 11 23 20 15 25 10 MEAN QFF PRESSURE IN HPA ****** 1024.9 1022.9 ****** 1014.7 1013.0 1008.4 1009.7 1014.5 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1038.6 1035.1 ****** 1023.1 1020.3 1015.8 1014.0 1023.2 ****** ****** ****** ****** DAY ** 25 8 ** 3 26 6 26 11 ** ** ** MIN. QFF PRESSURE IN HPA ****** 1011.0 1006.9 ****** 1002.8 999.2 1000.2 1003.7 1005.9 ****** ****** ****** ****** DAY ** 8 13 ** 20 10 11 23 20 ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1015.6 1024.0 1022.6 1015.5 1014.8 1012.9 1008.2 1009.3 1014.2 1019.0 1024.7 1023.4 1017.0 MAX. QFE PRESSURE IN HPA 1030.0 1038.1 1035.4 1029.4 1023.6 1020.4 1015.3 1013.8 1023.3 1035.2 1034.8 1038.2 1038.2 DAY 9 25 8 2 3 13 6 11 28 31 11 18 MIN. QFE PRESSURE IN HPA 1006.2 1011.4 1006.1 1002.7 1001.6 998.3 1000.8 1003.9 1004.4 1008.8 1008.3 1007.3 998.3 DAY 3 4 13 17 20 10 11 23 20 16 25 10 MEAN QNH PRESSURE IN HPA 1014.5 1022.9 1021.4 1014.4 1013.7 1011.7 1007.1 1008.2 1013.1 1017.9 1023.5 1022.2 1015.9 MAX. QNH PRESSURE IN HPA 1028.9 1037.0 1034.3 1028.3 1022.5 1019.3 1014.2 1012.7 1022.2 1034.1 1033.7 1037.1 1037.1 DAY 9 25 8 2 3 13 6 11 28 31 11 18 MIN. QNH PRESSURE IN HPA 1005.1 1010.3 1005.0 1001.6 1000.5 997.2 999.7 1002.8 1003.3 1007.7 1007.2 1006.2 997.2 DAY 3 4 13 17 20 10 11 23 20 16 25 10 MEAN QFF PRESSURE IN HPA ****** 1023.4 1022.0 ****** 1014.0 1012.1 1007.4 1008.5 1013.4 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1037.2 1034.5 *****