261 CDUS41 KLWX 130521 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1221 AM EST TUE DEC 13 2022 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 12 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 43 4:48 AM 72 1979 47 -4 51 MINIMUM 37 12:25 AM 9 1988 30 7 28 AVERAGE 40 38 2 40 PRECIPITATION (IN) YESTERDAY 0.00 0.95 1964 0.11 -0.11 0.00 MONTH TO DATE 0.40 1.37 -0.97 0.05 SINCE DEC 1 0.40 1.37 -0.97 0.05 SINCE JAN 1 36.21 41.31 -5.10 34.55 SNOWFALL (IN) YESTERDAY 0.0 10.6 1982 0.1 -0.1 0.0 MONTH TO DATE 0.0 0.9 -0.9 0.0 SINCE DEC 1 0.0 0.9 -0.9 0.0 SINCE JUL 1 T 1.2 -1.2 T SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 25 27 -2 25 MONTH TO DATE 283 303 -20 244 SINCE DEC 1 283 303 -20 244 SINCE JUL 1 1117 1203 -86 970 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 18 HIGHEST WIND DIRECTION N (350) HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION N (360) AVERAGE WIND SPEED 10.3 SKY COVER AVERAGE SKY COVER 0.9 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 82 12:00 AM LOWEST 53 7:00 AM AVERAGE 68 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 47 73 2015 MINIMUM TEMPERATURE (F) 29 7 1988 SUNRISE AND SUNSET DECEMBER 13 2022......SUNRISE 7:20 AM EST SUNSET 4:48 PM EST DECEMBER 14 2022......SUNRISE 7:21 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. $$