920 CDUS41 KLWX 150521 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1221 AM EST FRI DEC 15 2023 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 14 2023... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1960 TO 2023 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 50 3:27 PM 69 2015 47 3 42 MINIMUM 23 7:38 AM 3 1989 29 -6 20 AVERAGE 37 38 -1 31 PRECIPITATION (IN) YESTERDAY 0.00 1.24 2020 0.11 -0.11 T MONTH TO DATE 2.46 1.59 0.87 0.40 SINCE DEC 1 2.46 1.59 0.87 0.40 SINCE JAN 1 31.49 41.53 -10.04 36.21 SNOWFALL (IN) YESTERDAY 0.0 3.6 2003 0.1 -0.1 0.0 MONTH TO DATE 0.5 1.1 -0.6 0.0 SINCE DEC 1 0.5 1.1 -0.6 0.0 SINCE JUL 1 0.5 1.4 -0.9 T SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 28 27 1 34 MONTH TO DATE 308 357 -49 348 SINCE DEC 1 308 357 -49 348 SINCE JUL 1 1079 1257 -178 1182 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 1380 1231 149 1376 ................................................................... WIND (MPH) HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION W (290) HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION NW (300) AVERAGE WIND SPEED 3.7 SKY COVER AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 78 6:00 AM LOWEST 25 2:00 PM AVERAGE 52 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 47 71 1971 MINIMUM TEMPERATURE (F) 29 5 1989 SUNRISE AND SUNSET DECEMBER 15 2023......SUNRISE 7:21 AM EST SUNSET 4:49 PM EST DECEMBER 16 2023......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. $$