887
CDUS41 KLWX 212132
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
532 PM EDT THU AUG 21 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 21 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 73 2:23 PM 96 1962 86 -13 77
MINIMUM 64 9:04 AM 47 1976 65 -1 50
AVERAGE 69 75 -6 64
PRECIPITATION (IN)
TODAY 0.01 2.72 2018 0.10 -0.09 0.00
MONTH TO DATE 0.85 2.38 -1.53 3.05
SINCE JUN 1 10.72 10.83 -0.11 6.40
SINCE JAN 1 24.64 28.07 -3.43 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 1
MONTH TO DATE 0 0 0 1
SINCE JUN 1 15 13 2 1
SINCE JUL 1 0 0 0 1
COOLING
TODAY 4 10 -6 0
MONTH TO DATE 192 239 -47 273
SINCE JUN 1 990 855 135 1126
SINCE JAN 1 1108 961 147 1309
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 10.4
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 3:00 AM
LOWEST 73 2:00 PM
AVERAGE 85
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 86 101 1983
MINIMUM TEMPERATURE (F) 65 49 2024
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 6:29 AM EDT SUNSET 7:56 PM EDT
AUGUST 22 2025........SUNRISE 6:30 AM EDT SUNSET 7:55 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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