Climatological Report (Monthly)
Issued by NWS Sterling, VA

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000 CXUS51 KLWX 012122 CLMDCA CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 522 PM EDT FRI SEP 1 2017 ................................... ...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2017... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2017 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL ............................................................. TEMPERATURE (F) RECORD HIGH 106 08/06/1918 LOW 49 08/29/1986 08/31/1934 08/24/1890 HIGHEST 92 08/22 96 -4 LOWEST 62 08/30 59 3 AVG. MAXIMUM 84.6 86.5 -1.9 91.7 AVG. MINIMUM 70.2 69.7 0.5 73.7 MEAN 77.4 78.1 -0.7 DAYS MAX >= 90 9 8.4 0.6 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 14.41 1928 MINIMUM 0.55 1962 TOTALS 4.58 2.93 1.65 2.79 DAILY AVG. 0.15 0.09 0.06 DAYS >= .01 11 8.2 2.8 DAYS >= .10 6 5.2 0.8 DAYS >= .50 5 2.1 2.9 DAYS >= 1.00 1 0.7 0.3 GREATEST 24 HR. TOTAL 1.47 08/07 TO 08/07 DEGREE_DAYS HEATING TOTAL 0 0 0 0 SINCE 7/1 0 0 0 0 COOLING TOTAL 393 406 -13 556 SINCE 1/1 1491 1311 180 1586 .............................................................. WIND (MPH) AVERAGE WIND SPEED 7.1 HIGHEST WIND SPEED/DIRECTION 32/360 DATE 08/12 HIGHEST GUST SPEED/DIRECTION 37/330 DATE 08/12 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.70 NUMBER OF DAYS FAIR 3 NUMBER OF DAYS PC 16 NUMBER OF DAYS CLOUDY 12 AVERAGE RH (PERCENT) 71 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 8 MIXED PRECIP 0 HEAVY RAIN 4 RAIN 5 LIGHT RAIN 12 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 11 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...RONALD REAGAN WASHINGTON NATIONAL AIRPORT... THE MONTHLY AVERAGE TEMPERATURE WAS SLIGHTLY BELOW NORMAL. MONTHLY RAINFALL WAS ABOVE NORMAL. DESPITE THE COOL MONTH OVERALL, THE AVERAGE LOW TEMPERATURE WAS STILL ABOVE NORMAL. THERE WERE ALSO 9 DAYS WITH HIGH TEMPERATURES OF 90 OR HIGHER, WHICH IS 1 ABOVE AVERAGE. NO DAILY TEMPERATURE OR PRECIPITATION RECORDS WERE SET LAST MONTH. CLIMATE RECORDS HAVE BEEN KEPT AT RONALD REAGAN WASHINGTON NATIONAL AIRPORT SINCE AUGUST OF 1941. ADDITIONAL TEMPERATURE RECORDS FOR THE WASHINGTON DC AREA OBSERVED DOWNTOWN EXTEND BACK TO JANUARY OF 1872. PRECIPITATION RECORDS EXTEND BACK TO JANUARY OF 1871. SNOWFALL RECORDS BEGAN IN JANUARY OF 1884. ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION (NCEI). $$ DH/CAS/WOODY!

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