Fairfield Weather in January
Average highs run from 35°F on January 1 to 39°F on January 31, and lows from 24°F to 25°F. Normal precipitation for the month is 2.03 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
- 37°F
- Average low
- 25°F
- Precipitation
- 2.03 in
- Snowfall
- 6.4 in
- Record high
- 59°FJan 26, 2003
- Record low
- -10°FJan 5, 2004
- Chance of a freeze
- 100%
- Daylight
- 8 h 33 min to 9 h 33 min
- Cloud cover
- 75%
- Humidity
- 95%
- Dew point
- 24°F
- Wind
- 5.8 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 | 35°F | 24°F | 50°F 2020 | -1°F 2011 | 40% | 18% |
| Jan 2 | 35°F | 24°F | 50°F 2003 | 3°F 2016 | 40% | 17% |
| Jan 3 | 35°F | 24°F | 52°F 2020 | 0°F 2009 | 40% | 17% |
| Jan 4 | 35°F | 24°F | 57°F 2012 | -7°F 2004 | 40% | 17% |
| Jan 5 | 35°F | 24°F | 50°F 2006 | -10°F 2004 | 40% | 17% |
| Jan 6 | 36°F | 24°F | 50°F 2002 | -7°F 2004 | 40% | 17% |
| Jan 7 | 36°F | 24°F | 54°F 2002 | 1°F 2017 | 40% | 16% |
| Jan 8 | 36°F | 24°F | 51°F 2002 | 17°F 2005 | 40% | 16% |
| Jan 9 | 36°F | 24°F | 51°F 2007 | 18°F 2022 | 39% | 16% |
| Jan 10 | 36°F | 24°F | 53°F 2006 | 10°F 2011 | 39% | 16% |
| Jan 11 | 36°F | 24°F | 50°F 2014 | 5°F 2007 | 39% | 15% |
| Jan 12 | 36°F | 24°F | 51°F 2026 | -5°F 2024 | 39% | 15% |
| Jan 13 | 36°F | 24°F | 55°F 2026 | -8°F 2024 | 39% | 15% |
| Jan 14 | 36°F | 24°F | 51°F 1999 | -2°F 2024 | 39% | 15% |
| Jan 15 | 37°F | 25°F | 52°F 2010 | -2°F 2005 | 39% | 14% |
| Jan 16 | 37°F | 25°F | 55°F 2011 | 3°F 2017 | 38% | 14% |
| Jan 17 | 37°F | 25°F | 51°F 2011 | 12°F 2017 | 38% | 14% |
| Jan 18 | 37°F | 25°F | 53°F 2010 | 4°F 2024 | 38% | 14% |
| Jan 19 | 37°F | 25°F | 55°F 2005 | 15°F 2013 | 38% | 13% |
| Jan 20 | 37°F | 25°F | 50°F 2005 | 14°F 2025 | 37% | 13% |
| Jan 21 | 37°F | 25°F | 48°F 2005 | 8°F 2008 | 37% | 13% |
| Jan 22 | 37°F | 25°F | 52°F 2016 | 5°F 2008 | 37% | 13% |
| Jan 23 | 38°F | 25°F | 51°F 2005 | 4°F 2008 | 37% | 12% |
| Jan 24 | 38°F | 25°F | 50°F 2020 | 7°F 2008 | 37% | 12% |
| Jan 25 | 38°F | 25°F | 57°F 2015 | 11°F 2008 | 36% | 12% |
| Jan 26 | 38°F | 25°F | 59°F 2003 | 6°F 2009 | 36% | 11% |
| Jan 27 | 38°F | 25°F | 49°F 2018 | 12°F 2009 | 36% | 11% |
| Jan 28 | 38°F | 25°F | 58°F 2024 | 13°F 2008 | 36% | 11% |
| Jan 29 | 38°F | 25°F | 56°F 2018 | 11°F 2023 | 35% | 11% |
| Jan 30 | 39°F | 25°F | 53°F 1999 | 7°F 2023 | 35% | 11% |
| Jan 31 | 39°F | 25°F | 57°F 2020 | 16°F 2011 | 35% | 10% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 7:36 AM, sunset 4:09 PM
- January 31
- sunrise 7:16 AM, sunset 4:49 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00457180 (Rosalia), public domain. Records: NOAA GHCN-Daily, station USW00094176, 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.