Santa Rosa Weather in January
Average highs run from 63°F on January 1 to 67°F on January 31, and lows from 33°F to 35°F. Normal precipitation for the month is 0.74 in over about 3 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
- 64°F
- Average low
- 34°F
- Precipitation
- 0.74 in
- Record high
- 85°FJan 15, 2000
- Record low
- 18°FJan 15, 2007
- Chance of a freeze
- 99%
- Daylight
- 10 h 04 min to 10 h 38 min
- Cloud cover
- 41%
- Humidity
- 48%
- Dew point
- 30°F
- Wind
- 7.2 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Jan 1 | 63°F | 33°F | 76°F 2012 | 26°F 2003 | 11% |
| Jan 2 | 63°F | 33°F | 81°F 2006 | 23°F 2011 | 11% |
| Jan 3 | 63°F | 33°F | 81°F 2025 | 21°F 2015 | 11% |
| Jan 4 | 63°F | 33°F | 79°F 2018 | 30°F 1990 | 11% |
| Jan 5 | 63°F | 33°F | 78°F 2012 | 27°F 2004 | 11% |
| Jan 6 | 63°F | 33°F | 81°F 2006 | 30°F 2004 | 11% |
| Jan 7 | 63°F | 34°F | 80°F 2006 | 27°F 2000 | 11% |
| Jan 8 | 63°F | 34°F | 78°F 1996 | 26°F 1989 | 11% |
| Jan 9 | 63°F | 34°F | 79°F 2018 | 27°F 1989 | 11% |
| Jan 10 | 64°F | 34°F | 79°F 2004 | 30°F 1989 | 10% |
| Jan 11 | 64°F | 34°F | 79°F 1990 | 30°F 2024 | 10% |
| Jan 12 | 64°F | 34°F | 80°F 1996 | 28°F 2013 | 10% |
| Jan 13 | 64°F | 34°F | 77°F 1996 | 26°F 2013 | 10% |
| Jan 14 | 64°F | 34°F | 80°F 2000 | 22°F 2007 | 10% |
| Jan 15 | 64°F | 34°F | 85°F 2000 | 18°F 2007 | 10% |
| Jan 16 | 64°F | 34°F | 83°F 2000 | 23°F 2013 | 10% |
| Jan 17 | 65°F | 34°F | 80°F 2000 | 28°F 2006 | 10% |
| Jan 18 | 65°F | 34°F | 83°F 2000 | 27°F 2008 | 11% |
| Jan 19 | 65°F | 34°F | 80°F 1999 | 26°F 2008 | 11% |
| Jan 20 | 65°F | 34°F | 81°F 2009 | 24°F 2006 | 11% |
| Jan 21 | 65°F | 34°F | 81°F 2009 | 27°F 1988 | 11% |
| Jan 22 | 65°F | 35°F | 78°F 1994 | 25°F 2025 | 11% |
| Jan 23 | 65°F | 35°F | 81°F 2013 | 27°F 2006 | 11% |
| Jan 24 | 66°F | 35°F | 82°F 1999 | 28°F 2023 | 11% |
| Jan 25 | 66°F | 35°F | 84°F 2000 | 28°F 2023 | 11% |
| Jan 26 | 66°F | 35°F | 81°F 2000 | 31°F 2017 | 11% |
| Jan 27 | 66°F | 35°F | 80°F 2003 | 30°F 2023 | 12% |
| Jan 28 | 66°F | 35°F | 81°F 2018 | 29°F 1999 | 12% |
| Jan 29 | 66°F | 35°F | 85°F 2018 | 30°F 1989 | 12% |
| Jan 30 | 66°F | 35°F | 84°F 2018 | 30°F 1999 | 12% |
| Jan 31 | 67°F | 35°F | 83°F 2003 | 27°F 1994 | 12% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MST).
- January 1
- sunrise 7:30 AM, sunset 5:34 PM
- January 31
- sunrise 7:23 AM, sunset 6:01 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00020404 (Arizona City), public domain. Records: NOAA GHCN-Daily, station USC00026513, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.