699 CDUS41 KLWX 100531 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1231 AM EST SAT DEC 10 2022 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 9 2022... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1960 TO 2022 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 50 3:35 PM 72 1978 48 2 43 MINIMUM 29 11:42 PM 11 1989 30 -1 23 AVERAGE 40 39 1 33 PRECIPITATION (IN) YESTERDAY 0.00 1.12 1973 0.12 -0.12 0.00 MONTH TO DATE 0.40 1.03 -0.63 T SINCE DEC 1 0.40 1.03 -0.63 T SINCE JAN 1 36.21 40.97 -4.76 34.50 SNOWFALL (IN) YESTERDAY 0.0 4.0 2017 0.1 -0.1 0.0 MONTH TO DATE 0.0 0.7 -0.7 0.0 SINCE DEC 1 0.0 0.7 -0.7 0.0 SINCE JUL 1 T 1.0 -1.0 T SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 25 26 -1 32 MONTH TO DATE 204 224 -20 193 SINCE DEC 1 204 224 -20 193 SINCE JUL 1 1038 1124 -86 919 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 1376 1231 145 1480 ................................................................... WIND (MPH) HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NE (40) HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION N (20) AVERAGE WIND SPEED 4.7 SKY COVER AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 75 11:00 PM LOWEST 42 3:00 PM AVERAGE 59 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 48 70 1966 MINIMUM TEMPERATURE (F) 30 4 1989 SUNRISE AND SUNSET DECEMBER 10 2022......SUNRISE 7:18 AM EST SUNSET 4:48 PM EST DECEMBER 11 2022......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. $$