000 CXUS51 KLWX 011415 CLMDCA TTAA00 KLWX 010920 CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1008 AM EDT WED OCT 1 2008 ................................... ...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2008... CLIMATE NORMAL PERIOD 1971 TO 2000 CLIMATE RECORD PERIOD 1871 TO 2008 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL ............................................................. TEMPERATURE (F) RECORD HIGH 104 09/07/1881 LOW 36 09/23/1904 HIGHEST 95 09/04 92 3 09/03 LOWEST 56 09/21 48 8 09/20 AVG. MAXIMUM 81.9 79.3 2.6 82.3 AVG. MINIMUM 66.0 61.8 4.2 63.5 MEAN 73.9 70.5 3.4 DAYS MAX >= 90 6 3.3 2.7 DAYS MAX <= 32 0 0.0 0.0 DAYS MIN <= 32 0 0.0 0.0 DAYS MIN <= 0 0 0.0 0.0 PRECIPITATION (INCHES) RECORD MAXIMUM 17.45 1934 MINIMUM 0.11 2005 TOTALS 6.41 3.79 2.62 0.60 DAILY AVG. 0.21 0.13 0.08 DAYS >= .01 9 8.1 0.9 DAYS >= .10 8 5.4 2.6 DAYS >= .50 3 2.4 0.6 DAYS >= 1.00 1 1.1 -0.1 GREATEST 24 HR. TOTAL 3.90 09/05 TO 09/06 DEGREE_DAYS HEATING TOTAL 2 19 -17 10 SINCE 7/1 2 26 -24 10 COOLING TOTAL 280 200 80 254 SINCE 1/1 1669 1499 170 1682 .............................................................. WIND (MPH) AVERAGE WIND SPEED 7.6 HIGHEST WIND SPEED/DIRECTION 29/350 DATE 09/06 HIGHEST GUST SPEED/DIRECTION 41/350 DATE 09/06 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM NUMBER OF DAYS FAIR 6 NUMBER OF DAYS PC 14 NUMBER OF DAYS CLOUDY 9 AVERAGE RH (PERCENT) 63 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 3 MIXED PRECIP 0 HEAVY RAIN 7 RAIN 7 LIGHT RAIN 10 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 9 FOG W/VIS <= 1/4 MILE 0 HAZE 8 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && MONTHLY PRECIPITATION FOR SEPTEMBER 2008 WAS ABOVE NORMAL. OVER HALF THE MONTHLY PRECIPITATION OCCURRED ON SEPTEMBER 6TH AS TROPICAL STORM HANNA PRODUCED A NEW DAILY RECORD OF 3.50 INCHES FOR THE DATE. THIS SURPASSED THE OLD DAILY RECORD ON THE 6TH OF 1.55 INCHES SET IN 1996. SEPTEMBER OF 2008 WAS THE ELEVENTH WARMEST DATING BACK TO 1872. THE HIGH OF 95 ON THE 4TH TIED THE OLD RECORD HIGH SET IN 1985. A RECORD HIGH MIN TEMPERATURE WAS SET ON THE 13TH...74...AND ON THE 14TH...AS 75 TIED THE OLD RECORD FOR THE DATE. WARM NIGHTTIME TEMPERATURES CONTINUED FROM THE EVENING OF THE 14TH TO THE MORNING OF THE 15TH WHEN THE OVERNIGHT MIN WAS 80 DEGREES. $$