852 CDUS41 KLWX 080529 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1229 AM EST TUE DEC 08 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 7 2020... CLIMATE NORMAL PERIOD: 1981 TO 2010 CLIMATE RECORD PERIOD: 1960 TO 2020 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 40 2:59 PM 77 1998 49 -9 44 MINIMUM 28 3:22 AM 1 2002 29 -1 24 AVERAGE 34 39 -5 34 PRECIPITATION (IN) YESTERDAY T 2.14 2011 0.11 -0.11 0.00 MONTH TO DATE 0.99 0.77 0.22 0.46 SINCE DEC 1 0.99 0.77 0.22 0.46 SINCE JAN 1 44.64 39.35 5.29 38.30 SNOWFALL (IN) YESTERDAY T 1.6 1969 0.1 -0.1 0.0 MONTH TO DATE T 0.6 -0.6 T SINCE DEC 1 T 0.6 -0.6 T SINCE JUL 1 T 1.1 -1.1 T SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 31 26 5 31 MONTH TO DATE 168 176 -8 181 SINCE DEC 1 168 176 -8 181 SINCE JUL 1 835 1092 -257 1044 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 1406 1178 228 1524 ................................................................... WIND (MPH) HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NW (320) HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION N (340) AVERAGE WIND SPEED 8.7 SKY COVER AVERAGE SKY COVER 0.6 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. LIGHT SNOW RELATIVE HUMIDITY (PERCENT) HIGHEST 78 5:00 AM LOWEST 50 2:00 PM AVERAGE 64 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 48 76 1980 MINIMUM TEMPERATURE (F) 29 13 2002 SUNRISE AND SUNSET DECEMBER 8 2020......SUNRISE 7:16 AM EST SUNSET 4:47 PM EST DECEMBER 9 2020......SUNRISE 7:17 AM EST SUNSET 4:48 PM EST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$