January weather in DeForest, WI
The average temperature in DeForest in January is 17.6°F (8.7°F–26.4°F). Average precipitation: 1.24 inches. Average snowfall is 10.7 inches.
January is a winter month in DeForest, and is cooler than the annual average of 46°F. Daily temperatures swing about 17.7°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 8m. For travel, January is cold.
Avg High
26.4°F
Avg Low
8.7°F
Precipitation
1.24 in
Snow
10.7 in
January records in DeForest
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 46.9°F (2011) | -17.0°F (1968) | 0.57 in (1985) |
| January 2 | 48.0°F (2000) | -23.1°F (1979) | 0.57 in (1966) |
| January 3 | 48.9°F (2007) | -18.0°F (1979) | 0.50 in (1986) |
| January 4 | 48.0°F (2007) | -20.0°F (1999) | 0.80 in (1990) |
| January 5 | 46.9°F (2007) | -20.9°F (1979) | 0.35 in (1991) |
| January 6 | 50.0°F (2012) | -23.1°F (2014) | 0.35 in (1995) |
| January 7 | 46.9°F (2012) | -26.0°F (2014) | 0.72 in (2008) |
| January 8 | 51.1°F (2003) | -23.1°F (2014) | 0.47 in (2019) |
| January 9 | 54.0°F (2026) | -24.0°F (1977) | 0.45 in (2026) |
| January 10 | 48.0°F (2020) | -26.0°F (1982) | 0.38 in (2024) |
| January 11 | 51.1°F (2012) | -25.1°F (1979) | 0.49 in (2017) |
| January 12 | 54.0°F (2012) | -20.0°F (1977) | 0.33 in (2005) |
| January 13 | 46.0°F (1996) | -18.9°F (1963) | 0.60 in (2024) |
| January 14 | 48.9°F (2026) | -26.0°F (1994) | 0.20 in (2007) |
| January 15 | 48.0°F (1990) | -31.0°F (1994) | 0.23 in (2014) |
| January 16 | 45.0°F (1974) | -27.0°F (1994) | 0.90 in (2008) |
| January 17 | 48.9°F (1990) | -27.9°F (1982) | 0.57 in (2017) |
| January 18 | 51.1°F (1996) | -36.0°F (1994) | 0.60 in (1996) |
| January 19 | 46.9°F (1973) | -35.0°F (1985) | 0.66 in (1973) |
| January 20 | 45.0°F (1968) | -27.0°F (1994) | 0.93 in (1988) |
| January 21 | 48.0°F (1964) | -23.1°F (1963) | 0.57 in (1993) |
| January 22 | 48.0°F (1964) | -20.0°F (2011) | 0.89 in (2018) |
| January 23 | 45.0°F (1989) | -27.9°F (1963) | 0.69 in (1999) |
| January 24 | 50.0°F (1981) | -20.9°F (2026) | 0.70 in (2010) |
| January 25 | 52.0°F (1973) | -17.0°F (1963) | 0.80 in (2010) |
| January 26 | 53.1°F (1973) | -20.9°F (2019) | 1.30 in (1965) |
| January 27 | 54.0°F (2002) | -20.0°F (1988) | 0.62 in (1974) |
| January 28 | 45.0°F (2008) | -23.1°F (2014) | 0.85 in (2006) |
| January 29 | 48.9°F (2025) | -27.9°F (1965) | 0.70 in (2001) |
| January 30 | 51.1°F (2013) | -27.9°F (2019) | 0.66 in (2013) |
| January 31 | 57.9°F (2025) | -29.9°F (2019) | 0.35 in (2021) |