847
CDUS41 KLWX 212124
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
524 PM EDT SUN SEP 21 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 21 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 74 12:04 PM 92 1965 77 -3 83
1998
MINIMUM 66 7:21 AM 33 1962 56 10 65
AVERAGE 70 67 3 74
PRECIPITATION (IN)
TODAY 0.00 2.59 1979 0.13 -0.13 0.01
MONTH TO DATE 1.05 2.74 -1.69 0.62
SINCE SEP 1 1.05 2.74 -1.69 0.62
SINCE JAN 1 25.69 31.96 -6.27 26.40
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 16 -9 11
SINCE SEP 1 7 16 -9 11
SINCE JUL 1 9 17 -8 13
COOLING
TODAY 5 4 1 9
MONTH TO DATE 101 128 -27 93
SINCE SEP 1 101 128 -27 93
SINCE JAN 1 1249 1184 65 1507
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION E (100)
AVERAGE WIND SPEED 6.3
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 3:00 AM
LOWEST 71 12:00 PM
AVERAGE 79
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 94 1970
1980
2010
MINIMUM TEMPERATURE (F) 56 35 1962
SUNRISE AND SUNSET
SEPTEMBER 21 2025.....SUNRISE 6:57 AM EDT SUNSET 7:08 PM EDT
SEPTEMBER 22 2025.....SUNRISE 6:58 AM EDT SUNSET 7:06 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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