Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CDUS41 KLWX 200626
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
226 AM EDT WED AUG 20 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 19 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 72 4:31 PM 95 2002 86 -14 85
2019
MINIMUM 65 7:25 AM 51 1998 65 0 67
AVERAGE 69 76 -7 76
PRECIPITATION (IN)
YESTERDAY 0.01 1.54 1967 0.11 -0.10 T
MONTH TO DATE 0.83 2.17 -1.34 3.05
SINCE JUN 1 10.70 10.62 0.08 6.40
SINCE JAN 1 24.62 27.86 -3.24 23.70
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 4 11 -7 11
MONTH TO DATE 179 219 -40 272
SINCE JUN 1 977 835 142 1125
SINCE JAN 1 1095 941 154 1308
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 6.1
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 11:00 PM
LOWEST 76 2:00 PM
AVERAGE 87
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 86 104 1983
MINIMUM TEMPERATURE (F) 65 47 1964
1976
1998
SUNRISE AND SUNSET
AUGUST 20 2025........SUNRISE 6:28 AM EDT SUNSET 7:57 PM EDT
AUGUST 21 2025........SUNRISE 6:29 AM EDT SUNSET 7:56 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$