259
CDUS41 KLWX 302151
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
ISSUED BY NATIONAL WEATHER SERVICE STATE COLLEGE PA
550 PM EDT THU JUL 30 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 30 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)
TODAY
MAXIMUM 85 2:55 PM 98 1988 88 -3 94
MINIMUM 68 5:46 AM 48 2014 67 -1 73
AVERAGE 77 77 0 83
PRECIPITATION (IN)
TODAY 0.00 1.29 2018 0.13 -0.13 0.00
MONTH TO DATE 5.34 4.02 1.45 2.65
SINCE JUN 1 9.63 8.32 1.31 9.58
SINCE JAN 1 24.55 25.56 -1.01 23.50
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 7 19
MONTH TO DATE 423 358 65 459
SINCE JUN 1 701 596 105 780
SINCE JAN 1 874 702 172 898
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WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (340)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION N (300)
AVERAGE WIND SPEED MM
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 69 4:00 AM
LOWEST 42 12:00 PM
AVERAGE 56
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 89 103 1954
MINIMUM TEMPERATURE (F) 72 52 1895
SUNRISE AND SUNSET
JULY 31 2026..........SUNRISE 6:09 AM EDT SUNSET 8:22 PM EDT
AUGUST 1 2026..........SUNRISE 6:10 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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