Climatological Report (Monthly)
Issued by NWS Sterling, VA

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000 CXUS51 KLWX 071513 CLMDCA CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1013 AM EST WED JAN 7 2015 ................................... ...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2014 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL ............................................................. TEMPERATURE (F) RECORD HIGH 79 12/07/1998 LOW -13 12/31/1880 HIGHEST 70 12/01 66 4 LOWEST 29 12/31 17 12 AVG. MAXIMUM 49.8 46.8 3.0 49.8 AVG. MINIMUM 37.6 32.5 5.1 34.7 MEAN 43.7 39.7 4.0 DAYS MAX >= 90 0 0.0 0.0 DAYS MAX <= 32 0 1.8 -1.8 DAYS MIN <= 32 4 14.5 -10.5 DAYS MIN <= 0 0 0.0 0.0 PRECIPITATION (INCHES) RECORD MAXIMUM 7.56 1901 MINIMUM 0.19 1889 TOTALS 3.50 3.05 0.45 5.53 DAILY AVG. 0.11 0.10 0.01 DAYS >= .01 13 9.7 3.3 DAYS >= .10 8 5.6 2.4 DAYS >= .50 2 2.4 -0.4 DAYS >= 1.00 0 0.5 -0.5 GREATEST 24 HR. TOTAL 0.91 12/23 TO 12/24 SNOWFALL (INCHES) RECORDS TOTAL 16.6 2009 TOTALS T 2.3 -2.3 SINCE 7/1 T 2.8 -2.8 SNOWDEPTH AVG. 0 DAYS >= TRACE 2 1.5 0.5 DAYS >= 1.0 0 0.7 -0.7 GREATEST SNOW DEPTH 0 MM 24 HR TOTAL T DEGREE_DAYS HEATING TOTAL 649 786 -137 696 SINCE 7/1 1256 1481 -225 1404 COOLING TOTAL 0 0 0 0 SINCE 1/1 1712 1549 163 1719 .............................................................. WIND (MPH) AVERAGE WIND SPEED 8.0 HIGHEST WIND SPEED/DIRECTION 28/320 DATE 12/10 HIGHEST GUST SPEED/DIRECTION 43/330 DATE 12/10 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.70 NUMBER OF DAYS FAIR 3 NUMBER OF DAYS PC 15 NUMBER OF DAYS CLOUDY 13 AVERAGE RH (PERCENT) 61 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 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 1 SLEET 0 FOG 11 FOG W/VIS <= 1/4 MILE 2 HAZE 8 - 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. THE MONTHLY PRECIPITATION WAS SLIGHTLY ABOVE NORMAL. AFTER A COLDER THAN NORMAL NOVEMBER...LAST MONTH TIED WITH 1979 AS THE 15TH WARMEST DECEMBER ON RECORD. ONLY A TRACE OF SNOWFALL WAS OBSERVED THE ENTIRE MONTH...THE LOWEST DECEMBER MONTHLY SNOWFALL TOTAL SINCE 2011. $$

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