Corvallis Weather in December
Average highs run from 37°F on December 1 to 34°F on December 31, and lows from 20°F to 18°F. Normal precipitation for the month is 0.87 in over about 11 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
- 35°F
- Average low
- 18°F
- Precipitation
- 0.87 in
- Snowfall
- 6.8 in
- Record high
- 66°FDec 2, 2021
- Record low
- -31°FDec 9, 1972
- Chance of a freeze
- 100%
- Daylight
- 8 h 53 min to 8 h 40 min
- Cloud cover
- 69%
- Humidity
- 92%
- Dew point
- 17°F
- Wind
- 5.4 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 | 20°F | 60°F 2021 | -10°F 1931 | 36% | 6% |
| Dec 2 | 37°F | 20°F | 66°F 2021 | -11°F 1931 | 36% | 6% |
| Dec 3 | 37°F | 20°F | 62°F 1956 | -4°F 1931 | 36% | 6% |
| Dec 4 | 36°F | 19°F | 60°F 1965 | -20°F 1972 | 36% | 6% |
| Dec 5 | 36°F | 19°F | 60°F 2023 | -24°F 1972 | 36% | 6% |
| Dec 6 | 36°F | 19°F | 62°F 1939 | -18°F 1972 | 36% | 7% |
| Dec 7 | 36°F | 19°F | 57°F 1962 | -10°F 1972 | 36% | 7% |
| Dec 8 | 35°F | 19°F | 59°F 1938 | -27°F 1972 | 36% | 7% |
| Dec 9 | 35°F | 18°F | 66°F 1957 | -31°F 1972 | 36% | 7% |
| Dec 10 | 35°F | 18°F | 63°F 1939 | -28°F 1972 | 36% | 7% |
| Dec 11 | 35°F | 18°F | 60°F 1980 | -22°F 1932 | 36% | 7% |
| Dec 12 | 35°F | 18°F | 59°F 1988 | -14°F 1932 | 36% | 7% |
| Dec 13 | 34°F | 18°F | 54°F 1998 | -15°F 1932 | 36% | 7% |
| Dec 14 | 34°F | 18°F | 57°F 1929 | -15°F 1932 | 35% | 7% |
| Dec 15 | 34°F | 18°F | 64°F 1980 | -17°F 1932 | 35% | 7% |
| Dec 16 | 34°F | 17°F | 62°F 1980 | -21°F 1964 | 35% | 7% |
| Dec 17 | 34°F | 17°F | 62°F 1980 | -31°F 1964 | 35% | 8% |
| Dec 18 | 34°F | 17°F | 60°F 2013 | -21°F 1964 | 35% | 8% |
| Dec 19 | 34°F | 17°F | 57°F 1966 | -16°F 1998 | 34% | 8% |
| Dec 20 | 34°F | 17°F | 57°F 1950 | -23°F 1990 | 34% | 8% |
| Dec 21 | 34°F | 17°F | 57°F 1933 | -23°F 1983 | 34% | 8% |
| Dec 22 | 34°F | 17°F | 57°F 1933 | -27°F 1983 | 34% | 8% |
| Dec 23 | 34°F | 17°F | 54°F 1950 | -30°F 1983 | 34% | 8% |
| Dec 24 | 34°F | 17°F | 56°F 1919 | -28°F 1983 | 33% | 8% |
| Dec 25 | 34°F | 17°F | 56°F 2022 | -21°F 1944 | 33% | 8% |
| Dec 26 | 34°F | 17°F | 60°F 1980 | -19°F 1951 | 33% | 8% |
| Dec 27 | 34°F | 17°F | 61°F 1980 | -20°F 1916 | 33% | 8% |
| Dec 28 | 34°F | 17°F | 53°F 1965 | -16°F 1983 | 33% | 8% |
| Dec 29 | 34°F | 17°F | 62°F 1917 | -27°F 1990 | 33% | 8% |
| Dec 30 | 34°F | 17°F | 59°F 1962 | -27°F 1978 | 32% | 9% |
| Dec 31 | 34°F | 18°F | 58°F 1917 | -26°F 1978 | 32% | 9% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:59 AM, sunset 4:52 PM
- December 31
- sunrise 8:20 AM, sunset 5:00 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00248783 (Western Ag Rsch Ctr), public domain. Records: NOAA GHCN-Daily, station USC00243885, 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.