Washington climate

Washington Weather in December

NOAA 1991-2020 normals for Washington Wwtp 4W, 1.9 km from Washington

Average highs run from 59°F on December 1 to 54°F on December 31, and lows from 38°F to 35°F. Normal precipitation for the month is 3.61 in over about 10 wet days.

December day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Washington, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
56°F
Average low
36°F
Precipitation
3.61 in
Snowfall
0.7 in
Record high
86°FDec 7, 1906
Record low
13°FDec 21, 1901
Chance of a freeze
98%
Daylight
9 h 56 min to 9 h 48 min
Cloud cover
59%
Humidity
84%
Dew point
41°F
Wind
8.1 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Dec 159°F38°F76°F 189324°F 190327%0%
Dec 259°F38°F76°F 200629°F 202228%0%
Dec 359°F38°F75°F 189327°F 200828%0%
Dec 458°F38°F74°F 201224°F 202428%0%
Dec 558°F38°F71°F 202120°F 190528%0%
Dec 658°F38°F78°F 201319°F 190529%0%
Dec 758°F38°F86°F 190619°F 190529%0%
Dec 858°F37°F73°F 200420°F 190529%0%
Dec 957°F37°F74°F 200920°F 200629%0%
Dec 1057°F37°F74°F 200720°F 200629%0%
Dec 1157°F37°F79°F 200720°F 190429%0%
Dec 1257°F37°F74°F 201523°F 190330%0%
Dec 1357°F37°F77°F 200725°F 201030%0%
Dec 1456°F37°F76°F 200721°F 201030%0%
Dec 1556°F36°F73°F 200817°F 202530%0%
Dec 1656°F36°F73°F 189320°F 190030%0%
Dec 1756°F36°F74°F 190622°F 190030%0%
Dec 1856°F36°F76°F 190618°F 190330%0%
Dec 1956°F36°F73°F 200621°F 190330%0%
Dec 2055°F36°F68°F 201314°F 190130%0%
Dec 2155°F36°F73°F 201313°F 190130%0%
Dec 2255°F36°F80°F 201320°F 190430%0%
Dec 2355°F35°F77°F 201323°F 200530%0%
Dec 2455°F35°F76°F 201517°F 202230%0%
Dec 2554°F35°F78°F 201516°F 190630%0%
Dec 2654°F35°F74°F 201517°F 190630%0%
Dec 2754°F35°F75°F 201517°F 190330%0%
Dec 2854°F35°F77°F 200819°F 201730%0%
Dec 2954°F35°F78°F 201517°F 201729%0%
Dec 3054°F35°F77°F 200721°F 201729%0%
Dec 3154°F35°F71°F 202420°F 190329%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Washington, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EST).

December 1
sunrise 6:59 AM, sunset 4:55 PM
December 31
sunrise 7:17 AM, sunset 5:05 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00319100 (Washington Wwtp 4W), public domain. Records: NOAA GHCN-Daily, station USC00319100, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.