673
CDUS41 KLWX 210734
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
234 AM EST SUN DEC 21 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 20 2025
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)
YESTERDAY
MAXIMUM 46 3:08 PM 64 1988 45 1 40
MINIMUM 23 5:18 AM 8 1991 28 -5 34
AVERAGE 35 37 -2 37
PRECIPITATION (IN)
YESTERDAY 0.00 0.66 1973 0.11 -0.11 T
MONTH TO DATE 1.24 2.23 -0.99 2.35
SINCE DEC 1 1.24 2.23 -0.99 2.35
SINCE JAN 1 30.12 42.17 -12.05 33.38
SNOWFALL (IN)
YESTERDAY 0.0 4.3 1966 0.0 0.0 T
MONTH TO DATE 2.0 1.6 0.4 T
SINCE DEC 1 2.0 1.6 0.4 T
SINCE JUL 1 2.0 1.9 0.1 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 30 28 2 28
MONTH TO DATE 642 523 119 543
SINCE DEC 1 642 523 119 543
SINCE JUL 1 1435 1423 12 1211
COOLING
YESTERDAY 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
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WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 8.1
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 74 5:00 AM
LOWEST 37 3:00 PM
AVERAGE 56
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 45 70 2013
MINIMUM TEMPERATURE (F) 28 4 1989
SUNRISE AND SUNSET
DECEMBER 21 2025......SUNRISE 7:25 AM EST SUNSET 4:51 PM EST
DECEMBER 22 2025......SUNRISE 7:26 AM EST SUNSET 4:52 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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