768
CDUS41 KLWX 120647
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
247 AM EDT TUE AUG 12 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 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 86 4:46 PM 99 2021 87 -1 84
MINIMUM 61 1:32 AM 47 1972 66 -5 64
AVERAGE 74 76 -2 74
PRECIPITATION (IN)
YESTERDAY 0.00 4.68 1984 0.11 -0.11 0.00
MONTH TO DATE 0.12 1.30 -1.18 1.97
SINCE JUN 1 9.99 9.75 0.24 5.32
SINCE JAN 1 23.91 26.99 -3.08 22.62
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 9 11 -2 9
MONTH TO DATE 74 131 -57 186
SINCE JUN 1 872 747 125 1039
SINCE JAN 1 990 853 137 1222
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WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 4.7
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 3:00 AM
LOWEST 53 2:00 PM
AVERAGE 77
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 100 2021
MINIMUM TEMPERATURE (F) 66 51 1962
SUNRISE AND SUNSET
AUGUST 12 2025........SUNRISE 6:21 AM EDT SUNSET 8:08 PM EDT
AUGUST 13 2025........SUNRISE 6:22 AM EDT SUNSET 8:07 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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