718
CDUS41 KLWX 290729
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
229 AM EST MON DEC 29 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 28 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 45 11:59 PM 73 1984 44 1 52
MINIMUM 35 8:28 AM 8 1966 27 8 40
AVERAGE 40 35 5 46
PRECIPITATION (IN)
YESTERDAY 0.00 1.74 1967 0.10 -0.10 0.49
MONTH TO DATE 1.30 3.03 -1.73 2.86
SINCE DEC 1 1.30 3.03 -1.73 2.86
SINCE JAN 1 30.18 42.97 -12.79 33.89
SNOWFALL (IN)
YESTERDAY 0.0 2.3 1993 0.1 -0.1 0.0
MONTH TO DATE 2.0 2.4 -0.4 0.1
SINCE DEC 1 2.0 2.4 -0.4 0.1
SINCE JUL 1 2.0 2.7 -0.7 0.1
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 25 30 -5 19
MONTH TO DATE 839 756 83 786
SINCE DEC 1 839 756 83 786
SINCE JUL 1 1632 1656 -24 1454
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 20 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 7.8
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 11:00 PM
LOWEST 70 11:00 AM
AVERAGE 82
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 44 78 1984
MINIMUM TEMPERATURE (F) 27 7 1977
SUNRISE AND SUNSET
DECEMBER 29 2025......SUNRISE 7:28 AM EST SUNSET 4:56 PM EST
DECEMBER 30 2025......SUNRISE 7:28 AM EST SUNSET 4:57 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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