585
CDUS41 KLWX 180626
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
226 AM EDT MON AUG 18 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 17 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 95 3:50 PM 101 1988 87 8 87
MINIMUM 72 5:46 AM 44 1979 65 7 70
AVERAGE 84 76 8 79
PRECIPITATION (IN)
YESTERDAY 0.15 3.32 1997 0.11 0.04 0.47
MONTH TO DATE 0.82 1.95 -1.13 2.44
SINCE JUN 1 10.69 10.40 0.29 5.79
SINCE JAN 1 24.61 27.64 -3.03 23.09
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 19 11 8 14
MONTH TO DATE 168 197 -29 246
SINCE JUN 1 966 813 153 1099
SINCE JAN 1 1084 919 165 1282
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WIND (MPH)
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 43 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 6.5
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
HEAVY RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 94 6:00 PM
LOWEST 43 4:00 PM
AVERAGE 69
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 86 98 2009
MINIMUM TEMPERATURE (F) 65 45 1981
SUNRISE AND SUNSET
AUGUST 18 2025........SUNRISE 6:26 AM EDT SUNSET 8:00 PM EDT
AUGUST 19 2025........SUNRISE 6:27 AM EDT SUNSET 7:59 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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