Climatological Report (Monthly)
Issued by NWS Sterling, VA

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950 CXUS51 KLWX 022028 CCA CLMDCA CLIMATE REPORT...CORRECTED NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 428 PM EDT FRI SEP 2 2016 ................................... ...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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 106 08/06/1918 LOW 49 08/29/1986 08/31/1934 08/24/1890 HIGHEST 101 08/13 96 5 LOWEST 67 08/24 59 8 08/23 AVG. MAXIMUM 91.7 86.5 5.2 88.0 AVG. MINIMUM 73.7 69.7 4.0 70.5 MEAN 82.7 78.1 4.6 DAYS MAX >= 90 23 8.4 14.6 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 2.79 2.93 -0.14 1.16 DAILY AVG. 0.09 0.09 0.00 DAYS >= .01 4 8.2 -4.2 DAYS >= .10 3 5.2 -2.2 DAYS >= .50 3 2.1 0.9 DAYS >= 1.00 1 0.7 0.3 GREATEST 24 HR. TOTAL 1.16 08/15 TO 08/15 08/14 TO 08/15 08/15 TO 08/15 DEGREE_DAYS HEATING TOTAL 0 0 0 0 SINCE 7/1 0 0 0 0 COOLING TOTAL 556 406 150 449 SINCE 1/1 1586 1311 275 1674 .............................................................. WIND (MPH) AVERAGE WIND SPEED 7.7 HIGHEST WIND SPEED/DIRECTION 32/300 DATE 08/17 HIGHEST GUST SPEED/DIRECTION 41/300 DATE 08/17 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.60 NUMBER OF DAYS FAIR 5 NUMBER OF DAYS PC 21 NUMBER OF DAYS CLOUDY 5 AVERAGE RH (PERCENT) 65 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 3 MIXED PRECIP 0 HEAVY RAIN 3 RAIN 2 LIGHT RAIN 7 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 4 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. && WASHINGTON DC...REAGAN NATIONAL AIRPORT... THE MONTHLY AVERAGE TEMPERATURE WAS WELL ABOVE NORMAL...AND RANKED AS THE SECOND WARMEST AUGUST ON RECORD. MONTHLY PRECIPITATION WAS NEAR NORMAL. A TEMPERATURE OF 100 DEGREES OR GREATER WAS OBSERVED ON THREE DAYS LAST MONTH. THE ONLY OTHER TIME THIS HAPPENED WAS IN 1930 WHEN IT HAPPENED FIVE TIMES. THREE DAILY HIGH TEMPERATURE RECORDS WERE SET LAST MONTH. A HIGH OF 99 ON THE 12TH TIED THE RECORD PREVIOUSLY SET IN 1926 AND 1900. A HIGH OF 101 ON THE 13TH TIED THE RECORD PREVIOUSLY SET IN 1881. A HIGH OF 100 ON THE 14TH TIED THE RECORD PREVIOUSLY SET IN 1943. FOUR DAILY HIGH MINIMUM TEMPERATURE RECORDS WERE SET LAST MONTH. A LOW OF 81 ON THE 12TH BROKE THE OLD RECORD OF 78 SET IN 2005...1980 AND 1926. A LOW OF 81 ON THE 13TH BROKE THE OLD RECORD OF 79 SET IN 1995. A LOW OF 80 ON THE 14TH TIED THE RECORD PREVIOUSLY SET IN 2002. A LOW TEMPERATURE OF 77 ON THE 26TH TIED THE RECORD PREVIOUSLY SET IN 1993. THE LOW TEMPERATURE OF 81 OBSERVED ON BOTH THE 12TH AND 13TH ALSO TIED FOR THE HIGHEST MINIMUM TEMPERATURE OF ANY DAY IN AUGUST ON RECORD. IT ALSO HAPPENED ON AUGUST 3RD 2006. A DAILY MAXIMUM RAINFALL RECORD OF 1.16 INCHES WAS SET ON THE 15TH...BREAKING THE OLD RECORD OF 1.15 SET IN 1941. RECORDS AT RONALD REAGAN NATIONAL AIRPORT BEGAN IN 1941. ADDITIONAL RECORDS FROM THE OFFICE FORMERLY LOCATED IN DOWNTOWN WASHINGTON DC EXTEND BACK TO 1872. ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION. $$ DH ...CORRECTED FOR TEXT WRAP...

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