628 CDUS41 KLWX 180522 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1222 AM EST SUN DEC 18 2022 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 17 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 47 3:12 PM 70 1984 46 1 63 MINIMUM 32 4:43 AM 3 1989 29 3 53 AVERAGE 40 37 3 58 PRECIPITATION (IN) YESTERDAY 0.00 0.75 2000 0.10 -0.10 T MONTH TO DATE 2.34 1.91 0.43 0.05 SINCE DEC 1 2.34 1.91 0.43 0.05 SINCE JAN 1 38.15 41.85 -3.70 34.55 SNOWFALL (IN) YESTERDAY 0.0 4.3 1973 0.1 -0.1 0.0 MONTH TO DATE 0.0 1.4 -1.4 0.0 SINCE DEC 1 0.0 1.4 -1.4 0.0 SINCE JUL 1 T 1.7 -1.7 T SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 25 28 -3 7 MONTH TO DATE 424 439 -15 331 SINCE DEC 1 424 439 -15 331 SINCE JUL 1 1258 1339 -81 1057 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 14 HIGHEST WIND DIRECTION W (270) HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION W (260) AVERAGE WIND SPEED 6.1 SKY COVER AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 82 2:00 AM LOWEST 37 2:00 PM AVERAGE 60 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 46 76 2006 MINIMUM TEMPERATURE (F) 29 3 1989 SUNRISE AND SUNSET DECEMBER 18 2022......SUNRISE 7:23 AM EST SUNSET 4:50 PM EST DECEMBER 19 2022......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. $$