999 CDUS41 KLWX 190522 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1222 AM EST MON DEC 19 2022 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 18 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 42 2:22 PM 76 2006 46 -4 56 MINIMUM 28 11:48 PM 3 1989 29 -1 45 AVERAGE 35 37 -2 51 PRECIPITATION (IN) YESTERDAY 0.00 2.92 1977 0.11 -0.11 T MONTH TO DATE 2.34 2.02 0.32 0.05 SINCE DEC 1 2.34 2.02 0.32 0.05 SINCE JAN 1 38.15 41.96 -3.81 34.55 SNOWFALL (IN) YESTERDAY 0.0 2.0 2009 0.1 -0.1 0.0 MONTH TO DATE 0.0 1.5 -1.5 0.0 SINCE DEC 1 0.0 1.5 -1.5 0.0 SINCE JUL 1 T 1.8 -1.8 T SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 30 28 2 14 MONTH TO DATE 454 467 -13 345 SINCE DEC 1 454 467 -13 345 SINCE JUL 1 1288 1367 -79 1071 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 23 HIGHEST WIND DIRECTION NW (300) HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION W (290) AVERAGE WIND SPEED 9.7 SKY COVER AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 79 5:00 AM LOWEST 41 1:00 PM AVERAGE 60 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 46 63 1967 MINIMUM TEMPERATURE (F) 28 -2 1989 SUNRISE AND SUNSET DECEMBER 19 2022......SUNRISE 7:24 AM EST SUNSET 4:50 PM EST DECEMBER 20 2022......SUNRISE 7:24 AM EST SUNSET 4:51 PM EST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$