Rainier Weather in December
Average highs run from 49°F on December 1 to 46°F on December 31, and lows from 36°F to 35°F. Normal precipitation for the month is 7.14 in over about 24 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
- 47°F
- Average low
- 35°F
- Precipitation
- 7.14 in
- Snowfall
- 0.8 in
- Record high
- 64°FDec 2, 1934
- Record low
- 4°FDec 8, 1972
- Chance of a freeze
- 100%
- Daylight
- 8 h 54 min to 8 h 42 min
- Cloud cover
- 76%
- Humidity
- 94%
- Dew point
- 36°F
- Wind
- 4.9 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 | 49°F | 36°F | 60°F 1926 | 18°F 1985 | 78% | 1% |
| Dec 2 | 49°F | 36°F | 64°F 1934 | 18°F 1985 | 78% | 1% |
| Dec 3 | 48°F | 36°F | 59°F 1940 | 25°F 1928 | 78% | 1% |
| Dec 4 | 48°F | 36°F | 60°F 1938 | 22°F 1928 | 78% | 1% |
| Dec 5 | 48°F | 36°F | 64°F 1945 | 16°F 1928 | 78% | 1% |
| Dec 6 | 48°F | 35°F | 61°F 2023 | 18°F 1928 | 78% | 2% |
| Dec 7 | 48°F | 35°F | 60°F 2015 | 12°F 1972 | 78% | 2% |
| Dec 8 | 47°F | 35°F | 59°F 2015 | 4°F 1972 | 78% | 2% |
| Dec 9 | 47°F | 35°F | 59°F 2025 | 4°F 1972 | 78% | 2% |
| Dec 10 | 47°F | 35°F | 62°F 1993 | 7°F 1932 | 78% | 2% |
| Dec 11 | 47°F | 35°F | 60°F 2014 | 4°F 1932 | 78% | 2% |
| Dec 12 | 47°F | 35°F | 59°F 2014 | 6°F 1932 | 78% | 2% |
| Dec 13 | 47°F | 35°F | 59°F 1998 | 10°F 1932 | 78% | 2% |
| Dec 14 | 46°F | 35°F | 60°F 1977 | 8°F 1932 | 78% | 2% |
| Dec 15 | 46°F | 35°F | 61°F 2025 | 11°F 1932 | 78% | 2% |
| Dec 16 | 46°F | 35°F | 59°F 2025 | 16°F 1964 | 78% | 2% |
| Dec 17 | 46°F | 34°F | 58°F 1974 | 10°F 1964 | 78% | 2% |
| Dec 18 | 46°F | 34°F | 58°F 1959 | 10°F 1964 | 78% | 2% |
| Dec 19 | 46°F | 34°F | 58°F 2003 | 16°F 1964 | 78% | 2% |
| Dec 20 | 46°F | 34°F | 59°F 1994 | 16°F 1990 | 79% | 3% |
| Dec 21 | 46°F | 34°F | 60°F 1940 | 5°F 1990 | 78% | 3% |
| Dec 22 | 46°F | 34°F | 58°F 1933 | 5°F 1990 | 78% | 3% |
| Dec 23 | 46°F | 34°F | 63°F 1925 | 6°F 1983 | 78% | 3% |
| Dec 24 | 46°F | 34°F | 64°F 1950 | 6°F 1983 | 78% | 3% |
| Dec 25 | 46°F | 34°F | 58°F 1947 | 13°F 1983 | 78% | 3% |
| Dec 26 | 46°F | 34°F | 61°F 1980 | 20°F 1948 | 78% | 3% |
| Dec 27 | 46°F | 35°F | 58°F 1980 | 19°F 1941 | 78% | 3% |
| Dec 28 | 46°F | 35°F | 61°F 1980 | 18°F 1930 | 78% | 3% |
| Dec 29 | 46°F | 35°F | 57°F 1925 | 11°F 1990 | 78% | 3% |
| Dec 30 | 46°F | 35°F | 56°F 2023 | 10°F 1990 | 78% | 3% |
| Dec 31 | 46°F | 35°F | 59°F 1980 | 8°F 1978 | 78% | 3% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:34 AM, sunset 4:28 PM
- December 31
- sunrise 7:54 AM, sunset 4:36 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00454769 (Longview), public domain. Records: NOAA GHCN-Daily, station USC00454769, 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.