555
CDUS41 KLWX 110727
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
327 AM EDT TUE AUG 11 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 10 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 92 1:59 PM 97 2009 87 5 86
MINIMUM 69 11:59 PM 51 1999 66 3 54
AVERAGE 81 76 5 70
PRECIPITATION (IN)
YESTERDAY 0.38 2.38 1984 0.11 0.27 0.00
MONTH TO DATE 2.05 1.19 0.86 0.12
SINCE JUN 1 11.68 9.64 2.04 9.99
SINCE JAN 1 26.60 26.88 -0.28 23.91
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 1 13 -12 15
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 16 12 4 5
MONTH TO DATE 148 120 28 65
SINCE JUN 1 861 736 125 863
SINCE JAN 1 1034 842 192 981
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WIND (MPH)
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 48 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 3.9
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
RAIN
LIGHT RAIN
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 5:00 AM
LOWEST 50 1:00 PM
AVERAGE 74
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 99 2021
MINIMUM TEMPERATURE (F) 66 47 1972
SUNRISE AND SUNSET
AUGUST 11 2026........SUNRISE 6:20 AM EDT SUNSET 8:10 PM EDT
AUGUST 12 2026........SUNRISE 6:21 AM EDT SUNSET 8:08 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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