421
CDUS41 KLWX 250621
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
221 AM EDT TUE AUG 25 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 24 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 83 4:03 PM 97 1998 86 -3 84
MINIMUM 59 3:33 AM 46 1971 64 -5 66
1987
AVERAGE 71 75 -4 75
PRECIPITATION (IN)
YESTERDAY 0.00 3.88 1967 0.11 -0.11 T
MONTH TO DATE 4.29 2.72 1.57 0.85
SINCE JUN 1 13.92 11.17 2.75 10.72
SINCE JAN 1 28.84 28.41 0.43 24.64
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 6 10 -4 10
MONTH TO DATE 315 269 46 218
SINCE JUN 1 1028 885 143 1016
SINCE JAN 1 1201 991 210 1134
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 3.6
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 3:00 AM
LOWEST 35 6:00 PM
AVERAGE 63
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 85 97 1998
2007
2023
MINIMUM TEMPERATURE (F) 64 47 1971
SUNRISE AND SUNSET
AUGUST 25 2026........SUNRISE 6:32 AM EDT SUNSET 7:51 PM EDT
AUGUST 26 2026........SUNRISE 6:33 AM EDT SUNSET 7:49 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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