000 CXUS55 KBOU 011842 CLMDEN CLIMATE REPORT NATIONAL WEATHER SERVICE BOULDER, CO 1145 AM MDT WED OCT 1 2008 ................................... ...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2008... CLIMATE NORMAL PERIOD 1971 TO 2000 CLIMATE RECORD PERIOD 1872 TO 2008 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 97 09/04/1995 09/01/1995 09/05/1899 LOW 17 09/29/1985 HIGHEST 87 09/26 97 -10 91 09/03 09/22 LOWEST 40 09/09 17 23 40 09/27 09/25 AVG. MAXIMUM 76.0 77.4 -1.4 80.1 AVG. MINIMUM 47.5 47.3 0.2 50.0 MEAN 61.8 62.4 -0.6 65.1 DAYS MAX >= 90 0 2.2 -2.2 2 DAYS MAX <= 32 0 0.2 -0.2 0 DAYS MIN <= 32 0 0.8 -0.8 0 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 4.67 1961 MINIMUM T 1892 1944 TOTALS 1.04 1.14 -0.10 0.54 DAILY AVG. 0.03 0.04 -0.01 0.02 DAYS >= .01 5 6.3 -1.3 7 DAYS >= .10 4 MM MM 3 DAYS >= .50 1 MM MM 0 DAYS >= 1.00 0 MM MM 0 GREATEST 24 HR. TOTAL 0.79 09/11 TO 09/12 0.07 09/30/07 TO 09/30/07 SNOWFALL (INCHES) RECORDS TOTAL 17.2 1971 TOTALS 0.0 0.0 DEGREE_DAYS HEATING TOTAL 116 136 -20 76 SINCE 7/1 144 146 -2 76 COOLING TOTAL 26 57 -31 86 SINCE 1/1 825 696 129 961 FREEZE DATES RECORD EARLIEST 09/08/1962 LATEST 06/08/2007 EARLIEST 10/07 LATEST 05/05 ................................................................. WIND (MPH) AVERAGE WIND SPEED 8.8 RESULTANT WIND SPEED/DIRECTION 2/171 HIGHEST WIND SPEED/DIRECTION 38/010 DATE 09/01 HIGHEST GUST SPEED/DIRECTION 44/010 DATE 09/01 SKY COVER POSSIBLE SUNSHINE (PERCENT) 67 NUMBER OF DAYS FAIR 8 NUMBER OF DAYS PC 18 NUMBER OF DAYS CLOUDY 4 AVERAGE RH (PERCENT) 54 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 3 MIXED PRECIP 0 HEAVY RAIN 3 RAIN 3 LIGHT RAIN 8 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 7 FOG W/VIS <= 1/4 MILE 0 HAZE 2 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$ ...SEPTEMBER 2008 WAS JUST A NEAR NORMAL MONTH... SEPTEMBER 2008 TURNED OUT TO BE NEAR NORMAL IN BOTH THE TEMPERATURE AND PRECIPITATION CATEGORIES. IN THE PRECIPITATION CATEGORY...THE MONTH FINISHED WITH A TOTAL OF 1.04 INCHES WHICH WAS 0.10 INCH BELOW NORMAL. THE MONTH DID START OFF KIND OF WET AND BY THE 13TH...THE ENTIRE 1.04 INCHES HAD ALREADY BEEN COLLECTED. FROM THE 14TH THROUGH THE END OF THE MONTH THERE WAS ONLY 1 DAY WITH RAINFALL AND THAT AMOUNT WAS A MERE TRACE. SO WHAT AT FIRST APPEARED TO BE A WELL ABOVE NORMAL PRECIP MONTH ACTUALLY FINISHED JUST SLIGHTLY BELOW NORMAL. MAXIMUM 24 HOUR PRECIPTATION OCCURRED BETWEEN THE 11TH AND 12TH WITH A TOTAL OF 0.79 INCH. THE TOTAL MOISTURE FOR THE MONTH RESULTED FROM 5 DAYS OF RAINFALL. THERE WERE 3 THUNDERSTORM DAYS OF WHICH ONLY ONE PRODUCED RAINFALL. IT WAS THE 8TH YEAR IN ROW IN WHICH SEPTEMBER RECORDED NO SNOW. THE LAST MEASURABLE SNOWFALL OCCURRED IN 2000 (Y2K) WHEN A WHOPPING 0.2 INCH WAS RECORDED NEAR THE FORMER STAPLETON INTERNATIONAL AIRPORT. THE AVERAGE SNOWFALL FOR SEPTEMBER IN DENVER IS 2.1 INCHES. TEMPERATURES DURING THE MONTH WERE VERY MUCH ON THE PLEASANT SIDE. THE AVERAGE TEMPERATURE OF 61.8 DEGREES WAS ONLY 0.6 INCH BELOW NORMAL. THE MERCURY READINGS RANGED BETWEEN A HIGH OF 87 DEGREES DOWN TO A LOW OF 40 DEGREES. TO MOST PEOPLE`S DELIGHT...THERE NO BEASTLY 90S RECORDED AND FOR THE FLOWER AND VEGETABLE ENTHUSIASTS...THERE WERE NO FREEZING TEMPERATURES. SEPTEMBER...THE BEGINNING OF FALL MONTH PROVED TO BE TRUE TO FORM AND WAS VERY PLEASANT WITH WELL APPRECIATED MOISTURE EVEN THOUGH IT WAS SLIGHTLY BELOW NORMAL AND VERY COMFORTABLE TEMPERATURES. THREE THUNDERSTORMS WERE OBSERVED AT THE DENVER INTERNATIONAL AIRPORT (DIA). ONLY 1 STORM PRODUCED PRECIPITATION AND THERE WERE NO REPORTS OF ANY SEVERE WEATHER. THERE WERE NO DAYS WITH DENSE FOG RECORDED AT DIA BUT 7 DAYS ACCOUNTED FOR LIGHT FOG...VISIBILITY GREATER THAN 1/4 MILE. SEPTEMBER 2008 WAS NOT EVEN A VERY WINDY MONTH. THE RECORDED MAXIMUM WIND GUST OF 44 MPH WAS FROM A NORTHERLY DIRECTION (010). THE AVERAGE WIND SPEED FOR THE MONTH WAS ONLY 8.8 MPH. BENTON