Washington Weather in December
Average highs run from 57°F on December 1 to 52°F on December 31, and lows from 30°F to 27°F. Normal precipitation for the month is 0.86 in over about 5 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
- 53°F
- Average low
- 28°F
- Precipitation
- 0.86 in
- Record high
- 75°FDec 3, 1941
- Record low
- -4°FDec 25, 1909
- Chance of a freeze
- 100%
- Daylight
- 9 h 48 min to 9 h 39 min
- Cloud cover
- 49%
- Humidity
- 51%
- Dew point
- 21°F
- Wind
- 7.6 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 | 57°F | 30°F | 70°F 1973 | 7°F 1911 | 12% | 0% |
| Dec 2 | 56°F | 30°F | 69°F 1941 | 10°F 1911 | 12% | 0% |
| Dec 3 | 56°F | 29°F | 75°F 1941 | 13°F 1894 | 12% | 0% |
| Dec 4 | 55°F | 29°F | 70°F 1977 | 8°F 1898 | 13% | 0% |
| Dec 5 | 55°F | 29°F | 73°F 1977 | 12°F 1896 | 13% | 0% |
| Dec 6 | 55°F | 29°F | 71°F 1901 | 15°F 1895 | 13% | 0% |
| Dec 7 | 54°F | 29°F | 70°F 2023 | 11°F 1898 | 13% | 0% |
| Dec 8 | 54°F | 28°F | 67°F 1938 | 12°F 1895 | 13% | 0% |
| Dec 9 | 54°F | 28°F | 70°F 1893 | 11°F 1895 | 14% | 0% |
| Dec 10 | 54°F | 28°F | 70°F 1950 | 9°F 1899 | 14% | 0% |
| Dec 11 | 53°F | 28°F | 69°F 1939 | 8°F 1898 | 14% | 0% |
| Dec 12 | 53°F | 28°F | 70°F 1950 | 3°F 1898 | 14% | 0% |
| Dec 13 | 53°F | 28°F | 69°F 1958 | 5°F 1898 | 14% | 0% |
| Dec 14 | 53°F | 28°F | 66°F 1942 | 5°F 1899 | 15% | 0% |
| Dec 15 | 53°F | 28°F | 68°F 1950 | 4°F 1940 | 15% | 0% |
| Dec 16 | 52°F | 28°F | 68°F 1977 | 3°F 1940 | 15% | 0% |
| Dec 17 | 52°F | 28°F | 68°F 1980 | 8°F 1895 | 15% | 0% |
| Dec 18 | 52°F | 27°F | 66°F 2025 | 5°F 1895 | 15% | 0% |
| Dec 19 | 52°F | 27°F | 66°F 1901 | 3°F 1897 | 15% | 0% |
| Dec 20 | 52°F | 27°F | 66°F 1893 | 2°F 1897 | 16% | 0% |
| Dec 21 | 52°F | 27°F | 67°F 2023 | 4°F 1897 | 16% | 0% |
| Dec 22 | 52°F | 27°F | 67°F 2023 | 5°F 1898 | 16% | 0% |
| Dec 23 | 52°F | 27°F | 75°F 1955 | 3°F 1990 | 16% | 0% |
| Dec 24 | 52°F | 27°F | 69°F 1955 | 4°F 1895 | 17% | 0% |
| Dec 25 | 52°F | 27°F | 67°F 1955 | -4°F 1909 | 17% | 0% |
| Dec 26 | 52°F | 27°F | 70°F 1980 | -4°F 1909 | 17% | 0% |
| Dec 27 | 52°F | 27°F | 69°F 1955 | -4°F 1909 | 17% | 0% |
| Dec 28 | 52°F | 27°F | 68°F 1917 | 0°F 1909 | 17% | 0% |
| Dec 29 | 52°F | 27°F | 68°F 1980 | 0°F 1895 | 17% | 0% |
| Dec 30 | 52°F | 27°F | 68°F 1917 | 1°F 1895 | 17% | 0% |
| Dec 31 | 52°F | 27°F | 70°F 1995 | 1°F 1898 | 17% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:29 AM, sunset 5:17 PM
- December 31
- sunrise 7:48 AM, sunset 5:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00427516 (St George), public domain. Records: NOAA GHCN-Daily, station USC00427516, 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.