092 CDUS41 KLWX 180529 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1229 AM EST FRI DEC 18 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 17 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 36 3:47 PM 70 1984 45 -9 40 MINIMUM 28 7:29 AM 3 1989 27 1 34 AVERAGE 32 36 -4 37 PRECIPITATION (IN) YESTERDAY 0.01 0.75 2000 0.09 -0.08 0.07 MONTH TO DATE 3.54 1.77 1.77 2.34 SINCE DEC 1 3.54 1.77 1.77 2.34 SINCE JAN 1 47.19 40.35 6.84 40.18 SNOWFALL (IN) YESTERDAY T 4.3 1973 0.1 -0.1 0.0 MONTH TO DATE 2.3 1.7 0.6 0.6 SINCE DEC 1 2.3 1.7 0.6 0.6 SINCE JUL 1 2.3 2.2 0.1 0.6 SNOW DEPTH 1 DEGREE DAYS HEATING YESTERDAY 33 29 4 28 MONTH TO DATE 420 455 -35 443 SINCE DEC 1 420 455 -35 443 SINCE JUL 1 1087 1371 -284 1306 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 N (350) HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (10) AVERAGE WIND SPEED 6.5 SKY COVER AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. LIGHT SNOW FOG RELATIVE HUMIDITY (PERCENT) HIGHEST 92 12:00 AM LOWEST 72 1:00 PM AVERAGE 82 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 45 76 2006 MINIMUM TEMPERATURE (F) 26 3 1989 SUNRISE AND SUNSET DECEMBER 18 2020......SUNRISE 7:24 AM EST SUNSET 4:50 PM EST DECEMBER 19 2020......SUNRISE 7:24 AM EST SUNSET 4:50 PM EST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$