Windsor Weather in January
Average highs run from 57°F on January 1 to 60°F on January 31, and lows from 37°F to 38°F. Normal precipitation for the month is 6.67 in over about 12 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
- 58°F
- Average low
- 38°F
- Precipitation
- 6.67 in
- Record high
- 82°FJan 12, 2009
- Record low
- 20°FJan 15, 2007
- Chance of a freeze
- 84%
- Daylight
- 9 h 32 min to 10 h 15 min
- Cloud cover
- 59%
- Humidity
- 85%
- Dew point
- 44°F
- Wind
- 7.8 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 | 57°F | 37°F | 68°F 2007 | 24°F 2016 | 41% | 0% |
| Jan 2 | 57°F | 37°F | 68°F 2020 | 26°F 2013 | 41% | 0% |
| Jan 3 | 57°F | 37°F | 70°F 2014 | 26°F 2013 | 41% | 0% |
| Jan 4 | 57°F | 37°F | 69°F 2014 | 26°F 2009 | 41% | 0% |
| Jan 5 | 57°F | 37°F | 70°F 2012 | 23°F 2014 | 40% | 0% |
| Jan 6 | 57°F | 37°F | 70°F 2003 | 26°F 2017 | 40% | 0% |
| Jan 7 | 57°F | 37°F | 71°F 2025 | 29°F 2000 | 40% | 0% |
| Jan 8 | 57°F | 37°F | 70°F 2025 | 29°F 1999 | 40% | 0% |
| Jan 9 | 57°F | 37°F | 78°F 2025 | 27°F 2012 | 40% | 0% |
| Jan 10 | 57°F | 37°F | 66°F 2025 | 25°F 2011 | 40% | 0% |
| Jan 11 | 57°F | 37°F | 69°F 2025 | 28°F 1999 | 40% | 0% |
| Jan 12 | 57°F | 37°F | 82°F 2009 | 25°F 2007 | 40% | 0% |
| Jan 13 | 58°F | 37°F | 70°F 2009 | 21°F 2007 | 39% | 0% |
| Jan 14 | 58°F | 37°F | 69°F 2014 | 22°F 2007 | 39% | 0% |
| Jan 15 | 58°F | 37°F | 71°F 2014 | 20°F 2007 | 39% | 0% |
| Jan 16 | 58°F | 38°F | 73°F 2014 | 22°F 2007 | 39% | 0% |
| Jan 17 | 58°F | 38°F | 76°F 2021 | 21°F 2012 | 39% | 0% |
| Jan 18 | 58°F | 38°F | 79°F 2021 | 24°F 2007 | 39% | 0% |
| Jan 19 | 58°F | 38°F | 70°F 2011 | 26°F 2007 | 39% | 0% |
| Jan 20 | 58°F | 38°F | 70°F 2014 | 27°F 2013 | 39% | 0% |
| Jan 21 | 58°F | 38°F | 73°F 2014 | 26°F 2013 | 39% | 0% |
| Jan 22 | 58°F | 38°F | 77°F 2011 | 28°F 2014 | 39% | 0% |
| Jan 23 | 58°F | 38°F | 75°F 2006 | 27°F 2002 | 39% | 0% |
| Jan 24 | 59°F | 38°F | 73°F 2014 | 26°F 2007 | 39% | 0% |
| Jan 25 | 59°F | 38°F | 76°F 2014 | 29°F 2022 | 39% | 0% |
| Jan 26 | 59°F | 38°F | 73°F 2014 | 24°F 2021 | 39% | 0% |
| Jan 27 | 59°F | 38°F | 70°F 2012 | 27°F 2009 | 39% | 0% |
| Jan 28 | 59°F | 38°F | 70°F 2015 | 28°F 2001 | 38% | 0% |
| Jan 29 | 59°F | 38°F | 73°F 2024 | 28°F 1999 | 38% | 0% |
| Jan 30 | 59°F | 38°F | 73°F 2015 | 26°F 2002 | 38% | 0% |
| Jan 31 | 60°F | 38°F | 80°F 2015 | 26°F 2002 | 38% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 7:29 AM, sunset 5:01 PM
- January 31
- sunrise 7:17 AM, sunset 5:32 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00023213 (Santa Rosa Sonoma CO AP), public domain. Records: NOAA GHCN-Daily, station USW00023213, 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.