070
CDUS41 KLWX 130721
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
221 AM EST SAT DEC 13 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 12 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 38 3:57 PM 72 1979 47 -9 45
MINIMUM 20 11:44 PM 9 1988 30 -10 25
AVERAGE 29 38 -9 35
PRECIPITATION (IN)
YESTERDAY 0.00 0.95 1964 0.11 -0.11 0.00
MONTH TO DATE 0.78 1.37 -0.59 1.59
SINCE DEC 1 0.78 1.37 -0.59 1.59
SINCE JAN 1 29.66 41.31 -11.65 32.62
SNOWFALL (IN)
YESTERDAY 0.0 10.6 1982 0.1 -0.1 0.0
MONTH TO DATE 1.3 0.9 0.4 T
SINCE DEC 1 1.3 0.9 0.4 T
SINCE JUL 1 1.3 1.2 0.1 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 36 27 9 30
MONTH TO DATE 385 303 82 332
SINCE DEC 1 385 303 82 332
SINCE JUL 1 1178 1203 -25 1000
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
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 5.0
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 74 11:00 PM
LOWEST 42 3:00 PM
AVERAGE 58
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 47 73 2015
MINIMUM TEMPERATURE (F) 29 7 1988
SUNRISE AND SUNSET
DECEMBER 13 2025......SUNRISE 7:20 AM EST SUNSET 4:48 PM EST
DECEMBER 14 2025......SUNRISE 7:21 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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page