738 CDUS41 KLWX 090622 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 222 AM EDT SAT AUG 09 2025 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 8 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 82 4:04 PM 101 2007 87 -5 79 MINIMUM 61 5:08 AM 49 1989 66 -5 74 AVERAGE 72 77 -5 77 PRECIPITATION (IN) YESTERDAY 0.00 1.39 2024 0.12 -0.12 1.39 MONTH TO DATE 0.12 0.96 -0.84 1.72 SINCE JUN 1 9.99 9.41 0.58 5.07 SINCE JAN 1 23.91 26.65 -2.74 22.37 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 JUN 1 0.0 0.0 0.0 0.0 SINCE JUL 1 0.0 0.0 0.0 0.0 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE JUN 1 15 13 2 0 SINCE JUL 1 0 0 0 0 COOLING YESTERDAY 7 12 -5 12 MONTH TO DATE 54 96 -42 147 SINCE JUN 1 852 712 140 1000 SINCE JAN 1 970 818 152 1183 ................................................................... WIND (MPH) HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (90) HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION NE (50) AVERAGE WIND SPEED 3.3 SKY COVER AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. FOG RELATIVE HUMIDITY (PERCENT) HIGHEST 97 4:00 AM LOWEST 44 5:00 PM AVERAGE 71 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 87 97 1980 2001 MINIMUM TEMPERATURE (F) 66 47 1989 SUNRISE AND SUNSET AUGUST 9 2025........SUNRISE 6:18 AM EDT SUNSET 8:12 PM EDT AUGUST 10 2025........SUNRISE 6:19 AM EDT SUNSET 8:11 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$