January weather in Vacaville, CA
The average temperature in Vacaville in January is 47.7°F (37.7°F–57.6°F). Average precipitation: 5.26 inches.
January is a winter month in Vacaville, and is cooler than the annual average of 62.1°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 36m. For travel, January is a wet month.
Avg High
57.6°F
Avg Low
37.7°F
Precipitation
5.26 in
Daylight
9h 36m
January records in Vacaville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 68.0°F (2007) | 27.1°F (2015) | 2.34 in (2004) |
| January 2 | 68.0°F (2014) | 25.2°F (2013) | 1.24 in (2002) |
| January 3 | 66.0°F (2012) | 24.3°F (2013) | 2.01 in (2017) |
| January 4 | 71.1°F (2014) | 27.0°F (2004) | 2.61 in (2008) |
| January 5 | 71.1°F (2003) | 28.0°F (2001) | 0.94 in (2026) |
| January 6 | 66.0°F (2015) | 28.2°F (2017) | 2.87 in (2019) |
| January 7 | 69.1°F (2015) | 28.2°F (2024) | 1.28 in (2017) |
| January 8 | 70.0°F (2025) | 30.0°F (1999) | 3.11 in (2018) |
| January 9 | 75.0°F (2025) | 29.1°F (2011) | 2.23 in (2023) |
| January 10 | 66.9°F (2012) | 26.2°F (2011) | 3.38 in (2017) |
| January 11 | 70.0°F (2009) | 27.1°F (2013) | 0.98 in (2023) |
| January 12 | 78.1°F (2009) | 26.2°F (2013) | 0.32 in (2010) |
| January 13 | 72.0°F (2009) | 22.1°F (2013) | 1.00 in (2024) |
| January 14 | 70.0°F (2009) | 19.9°F (2007) | 1.52 in (2023) |
| January 15 | 70.0°F (2009) | 24.1°F (2007) | 1.58 in (2019) |
| January 16 | 77.0°F (2021) | 21.9°F (2007) | 2.06 in (2019) |
| January 17 | 73.9°F (2021) | 18.1°F (2012) | 0.79 in (2016) |
| January 18 | 75.9°F (2021) | 24.3°F (2012) | 1.95 in (2017) |
| January 19 | 70.0°F (2009) | 25.2°F (2013) | 1.89 in (2016) |
| January 20 | 72.0°F (2009) | 25.2°F (2013) | 2.15 in (2012) |
| January 21 | 73.0°F (2014) | 27.1°F (2013) | 0.99 in (2010) |
| January 22 | 75.0°F (2011) | 29.1°F (2013) | 1.34 in (2017) |
| January 23 | 72.0°F (2014) | 28.0°F (2004) | 1.73 in (2012) |
| January 24 | 73.0°F (2014) | 27.0°F (1999) | 1.97 in (2000) |
| January 25 | 75.0°F (2014) | 30.0°F (2007) | 1.05 in (2008) |
| January 26 | 68.0°F (2012) | 26.2°F (2021) | 0.76 in (2021) |
| January 27 | 71.1°F (2019) | 31.1°F (2013) | 0.94 in (2021) |
| January 28 | 72.0°F (2024) | 28.2°F (2025) | 0.72 in (2021) |
| January 29 | 71.1°F (2020) | 26.1°F (1999) | 0.22 in (2016) |
| January 30 | 75.0°F (2015) | 28.9°F (2002) | 0.62 in (2011) |
| January 31 | 78.1°F (2015) | 25.0°F (2002) | 1.03 in (2024) |