Jefferson Weather in January
Average highs run from 46°F on January 1 to 49°F on January 31, and lows from 34°F to 35°F. Normal precipitation for the month is 6.46 in over about 21 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 47°F
- Average low
- 34°F
- Precipitation
- 6.46 in
- Snowfall
- 0.5 in
- Record high
- 66°FJan 19, 2005
- Record low
- -1°FJan 31, 1950
- Chance of a freeze
- 99%
- Daylight
- 8 h 53 min to 9 h 48 min
- Cloud cover
- 74%
- Humidity
- 92%
- Dew point
- 38°F
- Wind
- 6.0 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 |
|---|---|---|---|---|---|---|
| Jan 1 | 46°F | 34°F | 59°F 1940 | 3°F 1924 | 69% | 1% |
| Jan 2 | 46°F | 34°F | 58°F 1981 | 8°F 1924 | 69% | 1% |
| Jan 3 | 46°F | 34°F | 58°F 1902 | 12°F 1950 | 69% | 1% |
| Jan 4 | 46°F | 34°F | 60°F 1914 | 16°F 1924 | 69% | 1% |
| Jan 5 | 46°F | 34°F | 64°F 1914 | 10°F 1924 | 69% | 1% |
| Jan 6 | 46°F | 34°F | 60°F 1914 | 13°F 1924 | 69% | 2% |
| Jan 7 | 46°F | 34°F | 60°F 1945 | 11°F 1937 | 69% | 2% |
| Jan 8 | 47°F | 34°F | 60°F 1962 | 9°F 1974 | 69% | 2% |
| Jan 9 | 47°F | 34°F | 60°F 1996 | 6°F 1909 | 69% | 2% |
| Jan 10 | 47°F | 34°F | 61°F 1895 | 9°F 1974 | 69% | 2% |
| Jan 11 | 47°F | 34°F | 59°F 1928 | 10°F 1993 | 69% | 2% |
| Jan 12 | 47°F | 34°F | 58°F 1900 | 13°F 1963 | 69% | 2% |
| Jan 13 | 47°F | 34°F | 59°F 1991 | 12°F 1909 | 68% | 2% |
| Jan 14 | 47°F | 34°F | 59°F 1991 | 6°F 1911 | 68% | 2% |
| Jan 15 | 47°F | 34°F | 59°F 2011 | 7°F 1907 | 68% | 2% |
| Jan 16 | 47°F | 34°F | 60°F 1958 | 15°F 2024 | 68% | 2% |
| Jan 17 | 47°F | 35°F | 61°F 1900 | 11°F 1907 | 68% | 2% |
| Jan 18 | 48°F | 35°F | 64°F 2018 | 11°F 1950 | 68% | 2% |
| Jan 19 | 48°F | 35°F | 66°F 2005 | 8°F 1916 | 68% | 2% |
| Jan 20 | 48°F | 35°F | 63°F 2005 | 16°F 1962 | 67% | 2% |
| Jan 21 | 48°F | 35°F | 61°F 1968 | 4°F 1930 | 67% | 2% |
| Jan 22 | 48°F | 35°F | 62°F 1931 | 11°F 1927 | 67% | 2% |
| Jan 23 | 48°F | 35°F | 61°F 2016 | 11°F 1962 | 67% | 2% |
| Jan 24 | 48°F | 35°F | 61°F 1931 | 11°F 1902 | 67% | 2% |
| Jan 25 | 48°F | 35°F | 62°F 2015 | 12°F 1902 | 67% | 2% |
| Jan 26 | 49°F | 35°F | 61°F 1924 | 15°F 1957 | 66% | 2% |
| Jan 27 | 49°F | 35°F | 64°F 1931 | 7°F 1957 | 66% | 2% |
| Jan 28 | 49°F | 35°F | 64°F 1931 | 11°F 1957 | 66% | 2% |
| Jan 29 | 49°F | 35°F | 66°F 2024 | 12°F 1957 | 66% | 2% |
| Jan 30 | 49°F | 35°F | 64°F 1940 | 12°F 1957 | 66% | 2% |
| Jan 31 | 49°F | 35°F | 64°F 1971 | -1°F 1950 | 65% | 2% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 7:49 AM, sunset 4:42 PM
- January 31
- sunrise 7:32 AM, sunset 5:20 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00351862 (Corvallis State Univ), public domain. Records: NOAA GHCN-Daily, station USC00351862, 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.