CXUS51 KLWX 051939 CLMDCA CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 338 PM EDT WED JUN 5 2013 ................................... ...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF MAY 2013... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2013 WEATHER OBSERVED NORMAL DEPART LAST YEAR'S VALUE DATE(S) VALUE FROM VALUE NORMAL ............................................................. TEMPERATURE (F) RECORD HIGH 99 05/31/1991 LOW 33 05/11/1906 HIGHEST 91 05/31 90 1 LOWEST 42 05/14 44 -2 AVG. MAXIMUM 75.8 75.4 0.4 80.1 AVG. MINIMUM 57.5 56.5 1.0 62.7 MEAN 66.7 66.0 0.7 DAYS MAX >= 90 3 1.1 1.9 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 10.69 1953 MINIMUM 0.41 1939 TOTALS 2.82 3.99 -1.17 3.28 DAILY AVG. 0.09 0.13 -0.04 DAYS >= .01 11 11.1 -0.1 DAYS >= .10 4 7.3 -3.3 DAYS >= .50 2 2.9 -0.9 DAYS >= 1.00 1 0.9 0.1 GREATEST 24 HR. TOTAL 1.34 05/28 DEGREE_DAYS HEATING TOTAL 83 79 4 4 SINCE 7/1 3765 4025 -260 3045 COOLING TOTAL 144 108 36 209 SINCE 1/1 185 134 51 259 .............................................................. WIND (MPH) AVERAGE WIND SPEED 8.7 HIGHEST WIND SPEED/DIRECTION 29/100 DATE 05/28 HIGHEST GUST SPEED/DIRECTION 38/320 DATE 05/24 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.70 NUMBER OF DAYS FAIR 5 NUMBER OF DAYS PC 9 NUMBER OF DAYS CLOUDY 17 AVERAGE RH (PERCENT) 63 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 5 MIXED PRECIP 0 HEAVY RAIN 3 RAIN 5 LIGHT RAIN 16 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 10 FOG W/VIS <= 1/4 MILE 0 HAZE 3 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && THE MONTHLY AVERAGE TEMPERATURE FOR MAY WAS NEAR NORMAL. IT WAS THE FIRST TIME SINCE 2009 THAT THE MAY AVERAGE TEMPERATURE FOR WASHINGTON DC WAS NOT WELL ABOVE NORMAL. THE FIRST 90-DEGREE DAY OF THE MONTH DID NOT OCCUR UNTIL THE 29TH... WHICH IS THE LATEST WITHOUT A 90-DEGREE DAY IN MAY SINCE 2009. THERE WERE NO 90-DEGREE DAYS RECORDED IN MAY 2009. THE MINIMUM TEMPERATURE OF 42F DEGREES ON THE 14TH WAS THE LOWEST TEMPERATURE IN MAY SINCE 3 MAY 2005 WHEN IT WAS 38F DEGREES. NO DAILY TEMPERATURE RECORDS WERE SET THIS MONTH. RAINFALL THIS MONTH WAS BELOW NORMAL. NEARLY HALF OF THE MONTHLY PRECIPITATION FELL ON THE 28TH. THE 1.34 INCHES OF RAIN THAT FELL ON THE 28TH WAS THE HIGHEST DAILY RAINFALL AMOUNT RECORDED IN MAY SINCE 26 MAY 2009 /1.65 INCHES/. $$ JRK