Benton County Weather in December
Average highs run from 48°F on December 1 to 46°F on December 31, and lows from 29°F to 28°F. Normal precipitation for the month is 13.42 in over about 21 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
- 46°F
- Average low
- 28°F
- Precipitation
- 13.42 in
- Snowfall
- 0.9 in
- Record high
- 65°FDec 1, 2021
- Record low
- 4°FDec 8, 2013
- Chance of a freeze
- 100%
- Daylight
- 9 h 05 min to 8 h 54 min
- Cloud cover
- 77%
- Humidity
- 93%
- Dew point
- 40°F
- Wind
- 6.5 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 | 48°F | 29°F | 65°F 2021 | 27°F 2024 | 71% | 1% |
| Dec 2 | 48°F | 29°F | 56°F 2008 | 26°F 2009 | 71% | 1% |
| Dec 3 | 48°F | 29°F | 58°F 2023 | 24°F 2009 | 71% | 2% |
| Dec 4 | 47°F | 29°F | 62°F 2023 | 21°F 2013 | 71% | 2% |
| Dec 5 | 47°F | 29°F | 62°F 2023 | 16°F 2013 | 71% | 2% |
| Dec 6 | 47°F | 29°F | 57°F 2017 | 22°F 2013 | 71% | 2% |
| Dec 7 | 47°F | 29°F | 62°F 2015 | 9°F 2013 | 70% | 2% |
| Dec 8 | 47°F | 29°F | 61°F 2015 | 4°F 2013 | 70% | 2% |
| Dec 9 | 47°F | 28°F | 61°F 2014 | 6°F 2013 | 70% | 2% |
| Dec 10 | 46°F | 28°F | 63°F 2025 | 9°F 2009 | 70% | 2% |
| Dec 11 | 46°F | 28°F | 62°F 2025 | 12°F 2009 | 70% | 2% |
| Dec 12 | 46°F | 28°F | 60°F 2010 | 15°F 2013 | 70% | 2% |
| Dec 13 | 46°F | 28°F | 58°F 2006 | 22°F 2011 | 70% | 2% |
| Dec 14 | 46°F | 28°F | 59°F 2018 | 24°F 2011 | 70% | 2% |
| Dec 15 | 46°F | 28°F | 61°F 2025 | 19°F 2008 | 70% | 2% |
| Dec 16 | 46°F | 28°F | 60°F 2025 | 11°F 2008 | 70% | 2% |
| Dec 17 | 46°F | 28°F | 60°F 2025 | 10°F 2008 | 70% | 2% |
| Dec 18 | 46°F | 28°F | 59°F 2024 | 27°F 2019 | 70% | 2% |
| Dec 19 | 46°F | 28°F | 58°F 2009 | 27°F 2008 | 70% | 2% |
| Dec 20 | 46°F | 28°F | 58°F 2014 | 29°F 2017 | 70% | 2% |
| Dec 21 | 45°F | 28°F | 59°F 2020 | 26°F 2017 | 70% | 2% |
| Dec 22 | 45°F | 28°F | 56°F 2013 | 23°F 2022 | 70% | 2% |
| Dec 23 | 45°F | 28°F | 57°F 2014 | 23°F 2022 | 70% | 2% |
| Dec 24 | 45°F | 28°F | 54°F 2014 | 28°F 2016 | 70% | 2% |
| Dec 25 | 45°F | 28°F | 61°F 2022 | 23°F 2016 | 70% | 2% |
| Dec 26 | 45°F | 28°F | 59°F 2022 | 24°F 2016 | 70% | 2% |
| Dec 27 | 46°F | 28°F | 55°F 2022 | 25°F 2021 | 69% | 2% |
| Dec 28 | 46°F | 28°F | 56°F 2011 | 25°F 2009 | 69% | 2% |
| Dec 29 | 46°F | 28°F | 54°F 2017 | 26°F 2020 | 69% | 3% |
| Dec 30 | 46°F | 28°F | 53°F 2011 | 21°F 2014 | 69% | 3% |
| Dec 31 | 46°F | 28°F | 53°F 2009 | 18°F 2014 | 69% | 3% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:30 AM, sunset 4:35 PM
- December 31
- sunrise 7:50 AM, sunset 4:44 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00351877 (Corvallis Water Bureau), public domain. Records: NOAA GHCN-Daily, station USW00004236, 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.