Washington Weather in December
Average highs run from 37°F on December 1 to 28°F on December 31, and lows from 24°F to 15°F. Normal precipitation for the month is 1.78 in over about 10 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 32°F
- Average low
- 19°F
- Precipitation
- 1.78 in
- Snowfall
- 12.0 in
- Record high
- 58°FDec 6, 2001
- Record low
- -21°FDec 29, 1976
- Chance of a freeze
- 100%
- Daylight
- 8 h 59 min to 8 h 47 min
- Cloud cover
- 73%
- Humidity
- 87%
- Dew point
- 25°F
- Wind
- 14.1 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 37°F | 24°F | 53°F 1970 | 3°F 1966 | 31% | 16% |
| Dec 2 | 36°F | 23°F | 55°F 1982 | 3°F 1966 | 31% | 16% |
| Dec 3 | 36°F | 23°F | 57°F 1998 | -2°F 1976 | 31% | 16% |
| Dec 4 | 36°F | 23°F | 53°F 2012 | 0°F 1976 | 31% | 17% |
| Dec 5 | 35°F | 23°F | 56°F 2001 | 6°F 1958 | 31% | 17% |
| Dec 6 | 35°F | 22°F | 58°F 2001 | 0°F 2007 | 31% | 17% |
| Dec 7 | 35°F | 22°F | 48°F 1979 | -1°F 1972 | 31% | 18% |
| Dec 8 | 34°F | 22°F | 47°F 1963 | 2°F 2013 | 31% | 18% |
| Dec 9 | 34°F | 21°F | 47°F 1952 | -5°F 1995 | 31% | 18% |
| Dec 10 | 34°F | 21°F | 45°F 2015 | 1°F 1995 | 31% | 18% |
| Dec 11 | 33°F | 21°F | 48°F 2015 | -5°F 1977 | 31% | 19% |
| Dec 12 | 33°F | 21°F | 47°F 1949 | 0°F 2013 | 31% | 19% |
| Dec 13 | 33°F | 20°F | 45°F 1968 | -3°F 1976 | 31% | 19% |
| Dec 14 | 32°F | 20°F | 50°F 1998 | -1°F 1989 | 31% | 19% |
| Dec 15 | 32°F | 20°F | 51°F 2015 | 0°F 1972 | 31% | 20% |
| Dec 16 | 32°F | 19°F | 52°F 2021 | -2°F 1951 | 31% | 20% |
| Dec 17 | 31°F | 19°F | 45°F 2015 | -5°F 1945 | 31% | 20% |
| Dec 18 | 31°F | 19°F | 42°F 1949 | -2°F 1945 | 31% | 20% |
| Dec 19 | 31°F | 18°F | 45°F 1957 | -6°F 1983 | 31% | 21% |
| Dec 20 | 31°F | 18°F | 44°F 1994 | -10°F 1989 | 31% | 21% |
| Dec 21 | 30°F | 18°F | 45°F 1967 | -13°F 1989 | 31% | 21% |
| Dec 22 | 30°F | 18°F | 42°F 1957 | -12°F 1989 | 31% | 22% |
| Dec 23 | 30°F | 17°F | 45°F 1957 | -8°F 1983 | 31% | 22% |
| Dec 24 | 30°F | 17°F | 51°F 2015 | -6°F 1983 | 31% | 22% |
| Dec 25 | 29°F | 17°F | 48°F 1982 | -7°F 1983 | 31% | 22% |
| Dec 26 | 29°F | 16°F | 48°F 2023 | -5°F 1990 | 31% | 23% |
| Dec 27 | 29°F | 16°F | 47°F 1994 | -6°F 1967 | 31% | 23% |
| Dec 28 | 29°F | 16°F | 45°F 1984 | -5°F 2000 | 31% | 23% |
| Dec 29 | 28°F | 15°F | 43°F 2024 | -21°F 1976 | 31% | 23% |
| Dec 30 | 28°F | 15°F | 45°F 1979 | -20°F 1976 | 32% | 24% |
| Dec 31 | 28°F | 15°F | 52°F 1965 | -13°F 1968 | 32% | 24% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:07 AM, sunset 4:06 PM
- December 31
- sunrise 7:27 AM, sunset 4:14 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00478905 (Washington Is), public domain. Records: NOAA GHCN-Daily, station USC00478905, 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.