January weather in Mason, WI
The average temperature in Mason in January is 14.0°F (5.8°F–22.3°F). Average precipitation: 0.64 inches.
January is a winter month in Mason, and is cooler than the annual average of 41.5°F. Daily temperatures swing about 16.5°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 8h 47m. For travel, January is cold.
Avg High
22.3°F
Avg Low
5.8°F
Precipitation
0.64 in
Daylight
8h 47m
January records in Mason
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 34.0°F (2023) | -23.1°F (1999) | 0.34 in (2005) |
| January 2 | 36.0°F (2004) | -20.7°F (2014) | 0.02 in (2004) |
| January 3 | 39.9°F (2007) | -18.8°F (2014) | 0.20 in (2009) |
| January 4 | 42.1°F (2019) | -11.7°F (2015) | 0.24 in (2023) |
| January 5 | 46.0°F (2012) | -16.8°F (2014) | 0.17 in (2024) |
| January 6 | 43.0°F (2012) | -24.9°F (2014) | 0.07 in (2016) |
| January 7 | 48.9°F (2003) | -21.8°F (2014) | 0.04 in (2016) |
| January 8 | 51.1°F (2003) | -15.9°F (2014) | 0.16 in (2016) |
| January 9 | 46.9°F (2012) | -24.9°F (2014) | 0.12 in (2024) |
| January 10 | 52.0°F (2012) | -18.8°F (2022) | 0.24 in (2000) |
| January 11 | 43.0°F (2013) | -14.1°F (1999) | 0.21 in (2025) |
| January 12 | 43.0°F (2013) | -14.1°F (1999) | 0.19 in (2024) |
| January 13 | 39.9°F (2026) | -19.8°F (2009) | 0.04 in (2008) |
| January 14 | 37.0°F (2021) | -18.0°F (2005) | 0.30 in (2004) |
| January 15 | 41.0°F (2023) | -20.7°F (2009) | 0.14 in (2001) |
| January 16 | 42.1°F (1999) | -18.8°F (2009) | 0.73 in (1999) |
| January 17 | 41.0°F (1999) | -20.9°F (2005) | 0.15 in (2023) |
| January 18 | 44.1°F (2017) | -22.0°F (2005) | 0.25 in (1999) |
| January 19 | 48.0°F (2017) | -16.8°F (2008) | 0.21 in (2023) |
| January 20 | 41.0°F (2018) | -18.8°F (2025) | 0.29 in (2017) |
| January 21 | 36.0°F (2017) | -22.9°F (2025) | 0.23 in (2005) |
| January 22 | 37.0°F (2017) | -18.8°F (2013) | 0.11 in (2018) |
| January 23 | 39.0°F (2015) | -25.1°F (2026) | 0.07 in (2012) |
| January 24 | 37.0°F (2010) | -24.0°F (2026) | 0.82 in (2010) |
| January 25 | 45.0°F (2002) | -25.1°F (2026) | 0.25 in (2023) |
| January 26 | 46.9°F (2018) | -20.7°F (2019) | 0.14 in (2001) |
| January 27 | 48.9°F (2006) | -17.9°F (2014) | 0.07 in (2016) |
| January 28 | 44.1°F (2008) | -18.8°F (2014) | 0.16 in (2006) |
| January 29 | 39.0°F (2024) | -22.0°F (2004) | 0.11 in (2016) |
| January 30 | 46.9°F (2016) | -22.9°F (2019) | 0.39 in (2001) |
| January 31 | 44.1°F (2024) | -27.8°F (2019) | 0.03 in (2002) |