499 CDUS41 KLWX 120524 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1224 AM EST SAT DEC 12 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 11 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 62 3:46 PM 71 1979 47 15 41 MINIMUM 32 6:16 AM 3 1968 28 4 30 AVERAGE 47 38 9 36 PRECIPITATION (IN) YESTERDAY 0.00 1.34 2008 0.10 -0.10 0.05 MONTH TO DATE 0.99 1.19 -0.20 1.24 SINCE DEC 1 0.99 1.19 -0.20 1.24 SINCE JAN 1 44.64 39.77 4.87 39.08 SNOWFALL (IN) YESTERDAY 0.0 0.5 1962 0.1 -0.1 0.2 MONTH TO DATE T 1.0 -1.0 0.2 SINCE DEC 1 T 1.0 -1.0 0.2 SINCE JUL 1 T 1.5 -1.5 0.2 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 18 27 -9 29 MONTH TO DATE 269 284 -15 280 SINCE DEC 1 269 284 -15 280 SINCE JUL 1 936 1200 -264 1143 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 13 HIGHEST WIND DIRECTION S (190) HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION S (200) AVERAGE WIND SPEED 6.3 SKY COVER AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. FOG RELATIVE HUMIDITY (PERCENT) HIGHEST 92 6:00 AM LOWEST 44 3:00 PM AVERAGE 68 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 47 72 1979 MINIMUM TEMPERATURE (F) 28 9 1988 SUNRISE AND SUNSET DECEMBER 12 2020......SUNRISE 7:20 AM EST SUNSET 4:48 PM EST DECEMBER 13 2020......SUNRISE 7:20 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. $$