Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CDUS41 KLWX 202131
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
531 PM EDT WED AUG 20 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 20 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 82 2:26 PM 104 1983 86 -4 74
MINIMUM 66 3:00 AM 47 1964 65 1 58
1976
1998
AVERAGE 74 76 -2 66
PRECIPITATION (IN)
TODAY 0.01 2.17 1963 0.11 -0.10 0.00
MONTH TO DATE 0.84 2.28 -1.44 3.05
SINCE JUN 1 10.71 10.73 -0.02 6.40
SINCE JAN 1 24.63 27.97 -3.34 23.70
SNOWFALL (IN)
TODAY 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
TODAY 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
TODAY 9 10 -1 1
MONTH TO DATE 188 229 -41 273
SINCE JUN 1 986 845 141 1126
SINCE JAN 1 1104 951 153 1309
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 7 HIGHEST WIND DIRECTION E (110)
HIGHEST GUST SPEED 9 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 2.8
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 12:00 AM
LOWEST 67 4:00 PM
AVERAGE 82
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 86 96 1962
MINIMUM TEMPERATURE (F) 65 47 1976
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.
$$