678
CDUS41 KLWX 112129
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
529 PM EDT TUE AUG 11 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 11 2026
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 87 3:22 PM 99 2021 87 0 86
MINIMUM 69 5:46 AM 47 1972 66 3 61
AVERAGE 78 76 2 74
PRECIPITATION (IN)
TODAY 0.12 4.68 1984 0.11 0.01 0.00
MONTH TO DATE 2.17 1.30 0.87 0.12
SINCE JUN 1 11.80 9.75 2.05 9.99
SINCE JAN 1 26.72 26.99 -0.27 23.91
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 1 13 -12 15
SINCE JUL 1 0 0 0 0
COOLING
TODAY 13 11 2 9
MONTH TO DATE 161 131 30 74
SINCE JUN 1 874 747 127 872
SINCE JAN 1 1047 853 194 990
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 4.8
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
THUNDERSTORM
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 12:00 AM
LOWEST 55 2:00 PM
AVERAGE 76
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 100 2021
MINIMUM TEMPERATURE (F) 66 51 1962
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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