534
CDUS41 KLWX 222125
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
525 PM EDT MON SEP 22 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 22 2025
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 79 3:59 PM 94 1970 77 2 74
1980
2010
MINIMUM 64 7:16 AM 35 1962 56 8 64
AVERAGE 72 66 6 69
PRECIPITATION (IN)
TODAY 0.00 1.57 1982 0.12 -0.12 0.02
MONTH TO DATE 1.05 2.86 -1.81 0.64
SINCE SEP 1 1.05 2.86 -1.81 0.64
SINCE JAN 1 25.69 32.08 -6.39 26.42
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 SEP 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 2 -2 0
MONTH TO DATE 7 18 -11 11
SINCE SEP 1 7 18 -11 11
SINCE JUL 1 9 19 -10 13
COOLING
TODAY 7 3 4 4
MONTH TO DATE 108 131 -23 97
SINCE SEP 1 108 131 -23 97
SINCE JAN 1 1256 1187 69 1511
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 7.0
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 3:00 AM
LOWEST 58 4:00 PM
AVERAGE 71
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 94 2019
MINIMUM TEMPERATURE (F) 55 33 1983
SUNRISE AND SUNSET
SEPTEMBER 22 2025.....SUNRISE 6:58 AM EDT SUNSET 7:06 PM EDT
SEPTEMBER 23 2025.....SUNRISE 6:59 AM EDT SUNSET 7:05 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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