887 CDUS41 KLWX 090531 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1231 AM EST WED DEC 09 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 8 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 45 2:44 PM 76 1980 48 -3 47 MINIMUM 31 6:13 AM 13 2002 29 2 20 AVERAGE 38 38 0 34 PRECIPITATION (IN) YESTERDAY 0.00 1.24 1972 0.10 -0.10 0.00 MONTH TO DATE 0.99 0.87 0.12 0.46 SINCE DEC 1 0.99 0.87 0.12 0.46 SINCE JAN 1 44.64 39.45 5.19 38.30 SNOWFALL (IN) YESTERDAY 0.0 5.0 1989 0.1 -0.1 0.0 MONTH TO DATE T 0.7 -0.7 T SINCE DEC 1 T 0.7 -0.7 T SINCE JUL 1 T 1.2 -1.2 T SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 27 27 0 31 MONTH TO DATE 195 203 -8 212 SINCE DEC 1 195 203 -8 212 SINCE JUL 1 862 1119 -257 1075 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 25 HIGHEST WIND DIRECTION NW (310) HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION NW (320) AVERAGE WIND SPEED 14.1 SKY COVER AVERAGE SKY COVER 0.1 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 63 8:00 PM LOWEST 40 3:00 PM AVERAGE 52 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 48 72 1978 MINIMUM TEMPERATURE (F) 29 11 1989 SUNRISE AND SUNSET DECEMBER 9 2020......SUNRISE 7:17 AM EST SUNSET 4:48 PM EST DECEMBER 10 2020......SUNRISE 7:18 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. $$