524
CDUS41 KLWX 312141
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
541 PM EDT FRI JUL 31 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 31 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 88 3:59 PM 98 1999 88 0 92
MINIMUM 65 4:50 AM 50 1997 67 -2 73
AVERAGE 77 77 0 83
PRECIPITATION (IN)
TODAY 0.00 1.87 1978 0.13 -0.13 0.29
MONTH TO DATE 5.34 4.15 1.19 2.94
SINCE JUN 1 9.63 8.45 1.18 9.87
SINCE JAN 1 24.55 25.69 -1.14 23.79
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 12 12 0 18
MONTH TO DATE 435 378 57 477
SINCE JUN 1 713 616 97 798
SINCE JAN 1 886 722 164 916
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 4.9
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 81 5:00 AM
LOWEST 39 4:00 PM
AVERAGE 60
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 100 1980
MINIMUM TEMPERATURE (F) 67 54 1997
SUNRISE AND SUNSET
JULY 31 2026..........SUNRISE 6:10 AM EDT SUNSET 8:22 PM EDT
AUGUST 1 2026........SUNRISE 6:11 AM EDT SUNSET 8:21 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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