Santa Rosa Weather in January
Average highs run from 54°F on January 1 to 57°F on January 31, and lows from 24°F to 25°F. Normal precipitation for the month is 0.81 in over about 2 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
- 56°F
- Average low
- 25°F
- Precipitation
- 0.81 in
- Snowfall
- 3.1 in
- Record high
- 81°FJan 16, 1974
- Record low
- -25°FJan 13, 1963
- Chance of a freeze
- 100%
- Daylight
- 9 h 51 min to 10 h 29 min
- Cloud cover
- 45%
- Humidity
- 53%
- Dew point
- 20°F
- Wind
- 11.2 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 | 54°F | 24°F | 77°F 1997 | -3°F 1979 | 9% | 5% |
| Jan 2 | 54°F | 24°F | 71°F 1997 | -19°F 1979 | 9% | 5% |
| Jan 3 | 54°F | 24°F | 79°F 1927 | -4°F 1919 | 9% | 5% |
| Jan 4 | 54°F | 24°F | 75°F 1927 | -10°F 1959 | 9% | 5% |
| Jan 5 | 54°F | 24°F | 74°F 1927 | -13°F 1971 | 9% | 5% |
| Jan 6 | 55°F | 24°F | 74°F 1927 | -9°F 1971 | 9% | 5% |
| Jan 7 | 55°F | 24°F | 74°F 2006 | -10°F 1971 | 9% | 5% |
| Jan 8 | 55°F | 24°F | 74°F 2002 | 4°F 1937 | 9% | 5% |
| Jan 9 | 55°F | 24°F | 72°F 1953 | 1°F 1977 | 9% | 5% |
| Jan 10 | 55°F | 24°F | 80°F 1990 | 1°F 1962 | 9% | 5% |
| Jan 11 | 55°F | 25°F | 72°F 1986 | -7°F 1962 | 9% | 5% |
| Jan 12 | 55°F | 25°F | 71°F 1953 | -8°F 1963 | 8% | 4% |
| Jan 13 | 55°F | 25°F | 72°F 1983 | -25°F 1963 | 8% | 4% |
| Jan 14 | 56°F | 25°F | 73°F 1975 | 0°F 1964 | 8% | 4% |
| Jan 15 | 56°F | 25°F | 75°F 1974 | 2°F 1964 | 8% | 4% |
| Jan 16 | 56°F | 25°F | 81°F 1974 | 6°F 1964 | 8% | 4% |
| Jan 17 | 56°F | 25°F | 74°F 1974 | -6°F 1930 | 8% | 4% |
| Jan 18 | 56°F | 25°F | 71°F 1976 | -10°F 1930 | 8% | 4% |
| Jan 19 | 56°F | 25°F | 78°F 1986 | 0°F 1963 | 8% | 4% |
| Jan 20 | 56°F | 25°F | 74°F 1950 | 3°F 1963 | 8% | 4% |
| Jan 21 | 56°F | 25°F | 75°F 1950 | 0°F 1930 | 8% | 4% |
| Jan 22 | 56°F | 25°F | 75°F 1950 | -9°F 1966 | 8% | 4% |
| Jan 23 | 57°F | 25°F | 75°F 1972 | 0°F 1966 | 8% | 4% |
| Jan 24 | 57°F | 25°F | 76°F 1950 | 7°F 1963 | 8% | 4% |
| Jan 25 | 57°F | 25°F | 70°F 1959 | 8°F 1938 | 8% | 4% |
| Jan 26 | 57°F | 25°F | 75°F 1971 | 12°F 1963 | 8% | 4% |
| Jan 27 | 57°F | 25°F | 76°F 2003 | 4°F 1963 | 8% | 4% |
| Jan 28 | 57°F | 25°F | 76°F 1986 | 3°F 1948 | 8% | 4% |
| Jan 29 | 57°F | 25°F | 74°F 1971 | -4°F 1949 | 8% | 4% |
| Jan 30 | 57°F | 25°F | 75°F 1971 | -5°F 1949 | 8% | 4% |
| Jan 31 | 57°F | 25°F | 73°F 1967 | 4°F 1985 | 9% | 4% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- January 1
- sunrise 7:07 AM, sunset 4:58 PM
- January 31
- sunrise 6:58 AM, sunset 5:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00298107 (Santa Rosa), public domain. Records: NOAA GHCN-Daily, station USC00298107, 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.