899
CDUS41 KLWX 170723
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
223 AM EST WED DEC 17 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 16 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 41 3:27 PM 72 1971 46 -5 48
MINIMUM 13 7:46 AM 9 2016 29 -16 35
AVERAGE 27 38 -11 42
PRECIPITATION (IN)
YESTERDAY 0.00 1.30 2020 0.11 -0.11 0.24
MONTH TO DATE 0.87 1.81 -0.94 2.16
SINCE DEC 1 0.87 1.81 -0.94 2.16
SINCE JAN 1 29.75 41.75 -12.00 33.19
SNOWFALL (IN)
YESTERDAY 0.0 5.2 1973 0.1 -0.1 0.0
MONTH TO DATE 2.0 1.3 0.7 T
SINCE DEC 1 2.0 1.3 0.7 T
SINCE JUL 1 2.0 1.6 0.4 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 38 27 11 23
MONTH TO DATE 538 411 127 450
SINCE DEC 1 538 411 127 450
SINCE JUL 1 1331 1311 20 1118
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 10 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 3.0
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 6:00 AM
LOWEST 29 2:00 PM
AVERAGE 57
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 46 70 1984
MINIMUM TEMPERATURE (F) 29 3 1989
SUNRISE AND SUNSET
DECEMBER 17 2025......SUNRISE 7:23 AM EST SUNSET 4:49 PM EST
DECEMBER 18 2025......SUNRISE 7:23 AM EST SUNSET 4:50 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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