Climatological Report (Monthly)
Issued by NWS Sterling, VA

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000 CXUS51 KLWX 011533 CCA CLMDCA CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1132 AM EDT WED JUN 1 2016 ................................... ...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF MAY 2016... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2016 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 88 05/27 90 -2 05/26 LOWEST 45 05/16 44 1 AVG. MAXIMUM 71.3 75.4 -4.1 82.7 AVG. MINIMUM 56.5 56.5 0.0 63.8 MEAN 63.9 66.0 -2.1 DAYS MAX >= 90 0 1.1 -1.1 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 5.65 3.99 1.66 1.92 DAILY AVG. 0.18 0.13 0.05 DAYS >= .01 19 11.1 7.9 DAYS >= .10 12 7.3 4.7 DAYS >= .50 3 2.9 0.1 DAYS >= 1.00 1 0.9 0.1 GREATEST 24 HR. TOTAL 1.24 05/02 TO 05/02 05/01 TO 05/02 05/02 TO 05/03 DEGREE_DAYS HEATING TOTAL 119 79 40 16 SINCE 7/1 3340 4025 -685 3924 COOLING TOTAL 92 108 -16 278 SINCE 1/1 128 134 -6 298 .............................................................. WIND (MPH) AVERAGE WIND SPEED 7.4 HIGHEST WIND SPEED/DIRECTION 31/250 DATE 05/15 HIGHEST GUST SPEED/DIRECTION 50/340 DATE 05/02 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.80 NUMBER OF DAYS FAIR 0 NUMBER OF DAYS PC 11 NUMBER OF DAYS CLOUDY 20 AVERAGE RH (PERCENT) 72 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 3 MIXED PRECIP 0 HEAVY RAIN 7 RAIN 8 LIGHT RAIN 20 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 1 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 18 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. && WASHINGTON DC...REAGAN NATIONAL AIRPORT... THE MONTHLY AVERAGE TEMPERATURE WAS BELOW NORMAL. MONTHLY PRECIPITATION WAS WELL ABOVE NORMAL...AND RANKED AS THE 19TH HIGHEST ON RECORD. THERE WERE 22 DAYS WHERE RAINFALL WAS OBSERVED...INCLUDING 19 WITH MEASURABLE RAIN AND 11 CONSECUTIVE DAYS WITH ANY RAIN TO START THE MONTH. PRELIMINARILY...THIS WOULD TIE FOR 6TH MOST DAYS WITH ANY RAIN AND RANK AS 2ND FOR MOST DAYS WITH MEASURABLE RAIN DURING MAY. A STRETCH OF 15 CONSECUTIVE DAYS OF MEASURABLE RAINFALL BEGAN ON APRIL 27TH AND ENDED ON MAY 11TH. THIS IS THE LONGEST STRETCH ON RECORD...BREAKING THE OLD MARK OF 10 DAYS SET IN 1938 AND 1873. PRECIPITATION RECORDS IN THE WASHINGTON DC AREA DATE BACK TO 1871. A TOTAL OF 10 DAYS LAST MONTH HAD A HIGH TEMPERATURE BELOW 65 DEGREES. THIS TIES FOR THE 7TH MOST ON RECORD. FOR THE FIRST TIME SINCE 2009...THERE WERE NO DAYS REACHING OR EXCEEDING 90 DEGREES AT REAGAN NATIONAL AIRPORT DURING THE MONTH OF MAY. ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE NATIONAL CENTER FOR ENVIRONMENTAL INFORMATION. $$ ...CORRECTED FOR THUNDERSTORM DAYS... DH/SMZ

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