902
CDUS41 KLWX 010627
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 AM EDT FRI AUG 01 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 31 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 92 11:58 AM 98 1999 88 4 97
MINIMUM 73 5:03 PM 50 1997 67 6 73
AVERAGE 83 77 6 85
PRECIPITATION (IN)
YESTERDAY 0.29 1.87 1978 0.13 0.16 T
MONTH TO DATE 2.94 4.15 -1.21 2.66
SINCE JUN 1 9.87 8.45 1.42 3.35
SINCE JAN 1 23.79 25.69 -1.90 20.65
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 18 12 6 20
MONTH TO DATE 477 378 99 499
SINCE JUN 1 798 616 182 853
SINCE JAN 1 916 722 194 1036
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WIND (MPH)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 7.5
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 5:00 PM
LOWEST 64 12:00 PM
AVERAGE 80
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 100 1980
MINIMUM TEMPERATURE (F) 67 54 1997
SUNRISE AND SUNSET
AUGUST 1 2025........SUNRISE 6:11 AM EDT SUNSET 8:21 PM EDT
AUGUST 2 2025........SUNRISE 6:12 AM EDT SUNSET 8:20 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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