881 CDUS41 KLWX 140522 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1222 AM EST MON DEC 14 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 13 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 65 1:13 PM 73 2015 46 19 38 MINIMUM 39 11:03 PM 7 1988 28 11 33 AVERAGE 52 37 15 36 PRECIPITATION (IN) YESTERDAY 0.00 1.47 1996 0.09 -0.09 0.25 MONTH TO DATE 0.99 1.39 -0.40 1.49 SINCE DEC 1 0.99 1.39 -0.40 1.49 SINCE JAN 1 44.64 39.97 4.67 39.33 SNOWFALL (IN) YESTERDAY 0.0 8.8 1966 0.1 -0.1 0.0 MONTH TO DATE T 1.2 -1.2 0.2 SINCE DEC 1 T 1.2 -1.2 0.2 SINCE JUL 1 T 1.7 -1.7 0.2 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 13 28 -15 29 MONTH TO DATE 296 340 -44 343 SINCE DEC 1 296 340 -44 343 SINCE JUL 1 963 1256 -293 1206 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 15 HIGHEST WIND DIRECTION N (350) HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (340) AVERAGE WIND SPEED 8.1 SKY COVER AVERAGE SKY COVER 0.4 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 86 6:00 AM LOWEST 43 2:00 PM AVERAGE 65 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 46 69 2015 MINIMUM TEMPERATURE (F) 27 3 1989 SUNRISE AND SUNSET DECEMBER 14 2020......SUNRISE 7:21 AM EST SUNSET 4:48 PM EST DECEMBER 15 2020......SUNRISE 7:22 AM EST SUNSET 4:49 PM EST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$