944 CDUS41 KLWX 120626 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 226 AM EDT MON MAY 12 2025 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 11 2025... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1960 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 80 3:54 PM 90 1993 74 6 67 MINIMUM 48 5:15 AM 29 1966 52 -4 45 AVERAGE 64 63 1 56 PRECIPITATION (IN) YESTERDAY 0.00 3.73 2008 0.15 -0.15 0.39 MONTH TO DATE 1.43 1.59 -0.16 1.99 SINCE MAR 1 4.86 8.56 -3.70 7.62 SINCE JAN 1 9.28 14.11 -4.83 15.07 SNOWFALL (IN) YESTERDAY 0.0 MM MM 0.0 0.0 0.0 MONTH TO DATE 0.0 0.0 0.0 0.0 SINCE MAR 1 0.0 4.0 -4.0 T SINCE JUL 1 15.5 21.0 -5.5 11.7 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 1 4 -3 9 MONTH TO DATE 18 57 -39 32 SINCE MAR 1 709 1024 -315 711 SINCE JUL 1 4031 4534 -503 3675 COOLING YESTERDAY 0 2 -2 0 MONTH TO DATE 29 18 11 42 SINCE MAR 1 76 40 36 86 SINCE JAN 1 76 40 36 89 ................................................................... WIND (MPH) HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION S (200) HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (200) AVERAGE WIND SPEED 2.4 SKY COVER AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 90 5:00 AM LOWEST 30 12:00 PM AVERAGE 60 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 74 90 2018 MINIMUM TEMPERATURE (F) 52 34 1969 SUNRISE AND SUNSET MAY 12 2025...........SUNRISE 6:00 AM EDT SUNSET 8:13 PM EDT MAY 13 2025...........SUNRISE 5:59 AM EDT SUNSET 8:14 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$