688
CDUS41 KLWX 102128
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
428 PM EST WED DEC 10 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 10 2025
VALID TODAY AS OF 0400 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 45 2:48 PM 70 1966 48 -3 55
MINIMUM 29 3:49 AM 4 1989 30 -1 38
AVERAGE 37 39 -2 47
PRECIPITATION (IN)
TODAY T 2.26 1992 0.11 -0.11 0.01
MONTH TO DATE 0.78 1.14 -0.36 0.08
SINCE DEC 1 0.78 1.14 -0.36 0.08
SINCE JAN 1 29.66 41.08 -11.42 31.11
SNOWFALL (IN)
TODAY 0.0 2.6 1992 0.0 0.0 0.0
MONTH TO DATE 1.3 0.7 0.6 T
SINCE DEC 1 1.3 0.7 0.6 T
SINCE JUL 1 1.3 1.0 0.3 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 28 26 2 18
MONTH TO DATE 321 250 71 285
SINCE DEC 1 321 250 71 285
SINCE JUL 1 1114 1150 -36 953
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1330 1231 99 1586
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 11.2
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 85 7:00 AM
LOWEST 56 2:00 PM
AVERAGE 71
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 48 71 1979
MINIMUM TEMPERATURE (F) 30 3 1968
SUNRISE AND SUNSET
DECEMBER 10 2025......SUNRISE 7:18 AM EST SUNSET 4:48 PM EST
DECEMBER 11 2025......SUNRISE 7:19 AM EST SUNSET 4:48 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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