997 CDUS41 KLWX 190638 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 238 AM EDT MON MAY 19 2025 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 18 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 77 4:55 PM 91 1987 75 2 64 MINIMUM 62 11:59 PM 33 1973 54 8 61 AVERAGE 70 64 6 63 PRECIPITATION (IN) YESTERDAY 0.00 3.13 1988 0.15 -0.15 0.69 MONTH TO DATE 3.34 2.68 0.66 3.16 SINCE MAR 1 6.77 9.65 -2.88 8.79 SINCE JAN 1 11.19 15.20 -4.01 16.24 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 0 3 -3 2 MONTH TO DATE 20 84 -64 47 SINCE MAR 1 711 1051 -340 726 SINCE JUL 1 4033 4561 -528 3690 COOLING YESTERDAY 5 3 2 0 MONTH TO DATE 68 35 33 44 SINCE MAR 1 115 57 58 88 SINCE JAN 1 115 57 58 91 ................................................................... WIND (MPH) HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (310) HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION W (270) AVERAGE WIND SPEED 10.1 SKY COVER AVERAGE SKY COVER 0.6 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 59 10:00 PM LOWEST 40 5:00 PM AVERAGE 50 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 76 92 1996 1997 MINIMUM TEMPERATURE (F) 54 36 2002 SUNRISE AND SUNSET MAY 19 2025...........SUNRISE 5:54 AM EDT SUNSET 8:19 PM EDT MAY 20 2025...........SUNRISE 5:53 AM EDT SUNSET 8:20 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$