Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CDUS41 KLWX 100622
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
222 AM EDT SUN AUG 10 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 9 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 84 4:24 PM 97 1980 87 -3 86
2001
MINIMUM 58 5:25 AM 47 1989 66 -8 74
AVERAGE 71 77 -6 80
PRECIPITATION (IN)
YESTERDAY 0.00 2.28 1969 0.12 -0.12 0.25
MONTH TO DATE 0.12 1.08 -0.96 1.97
SINCE JUN 1 9.99 9.53 0.46 5.32
SINCE JAN 1 23.91 26.77 -2.86 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 6 12 -6 15
MONTH TO DATE 60 108 -48 162
SINCE JUN 1 858 724 134 1015
SINCE JAN 1 976 830 146 1198
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 1.8
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 2:00 AM
LOWEST 31 4:00 PM
AVERAGE 64
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 97 2009
MINIMUM TEMPERATURE (F) 66 51 1999
SUNRISE AND SUNSET
AUGUST 10 2025........SUNRISE 6:19 AM EDT SUNSET 8:11 PM EDT
AUGUST 11 2025........SUNRISE 6:20 AM EDT SUNSET 8:09 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$