January weather in Plymouth, WI
The average temperature in Plymouth in January is 18.9°F (11.6°F–26.3°F). Average precipitation: 1.59 inches. Average snowfall is 12.4 inches.
January is a winter month in Plymouth, and is cooler than the annual average of 45.7°F. Daily temperatures swing about 14.7°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 5m. For travel, January is cold.
Avg High
26.3°F
Avg Low
11.6°F
Precipitation
1.59 in
Snow
12.4 in
January records in Plymouth
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 50.0°F (2005) | -18.9°F (1969) | 1.52 in (1942) |
| January 2 | 43.0°F (1933) | -17.0°F (1979) | 0.66 in (2005) |
| January 3 | 51.1°F (1998) | -15.0°F (1979) | 0.68 in (1971) |
| January 4 | 53.1°F (1998) | -18.0°F (1919) | 1.36 in (1982) |
| January 5 | 48.9°F (2007) | -20.0°F (1912) | 1.14 in (1929) |
| January 6 | 51.1°F (1933) | -23.1°F (1912) | 0.82 in (1918) |
| January 7 | 48.9°F (2012) | -23.1°F (1912) | 0.40 in (2016) |
| January 8 | 52.0°F (2003) | -20.0°F (1942) | 1.06 in (1937) |
| January 9 | 55.0°F (2026) | -18.0°F (1977) | 0.95 in (1998) |
| January 10 | 52.0°F (2002) | -29.0°F (1982) | 0.56 in (2024) |
| January 11 | 52.0°F (2018) | -18.9°F (1912) | 0.54 in (2017) |
| January 12 | 52.0°F (2012) | -22.0°F (1912) | 0.72 in (1960) |
| January 13 | 54.0°F (1961) | -24.0°F (1929) | 0.83 in (1950) |
| January 14 | 50.0°F (2026) | -18.9°F (1929) | 1.71 in (1940) |
| January 15 | 52.0°F (1953) | -29.0°F (1972) | 0.38 in (1976) |
| January 16 | 51.1°F (1949) | -24.0°F (1982) | 0.94 in (1980) |
| January 17 | 48.9°F (1990) | -27.9°F (1982) | 0.49 in (1953) |
| January 18 | 51.1°F (1973) | -26.0°F (1994) | 0.55 in (1943) |
| January 19 | 46.9°F (1973) | -27.0°F (1994) | 0.52 in (1920) |
| January 20 | 48.9°F (1968) | -27.9°F (1985) | 1.38 in (1988) |
| January 21 | 54.0°F (1934) | -23.1°F (1924) | 0.57 in (1917) |
| January 22 | 50.0°F (1964) | -22.0°F (1936) | 0.72 in (1999) |
| January 23 | 48.0°F (1989) | -26.0°F (1963) | 0.72 in (2018) |
| January 24 | 51.1°F (1934) | -23.1°F (1936) | 1.97 in (1938) |
| January 25 | 57.9°F (1944) | -15.0°F (2026) | 1.00 in (1950) |
| January 26 | 60.1°F (1944) | -22.0°F (2019) | 0.94 in (1974) |
| January 27 | 52.0°F (1944) | -22.0°F (2019) | 1.33 in (1916) |
| January 28 | 52.0°F (2002) | -23.1°F (1966) | 0.85 in (1918) |
| January 29 | 53.1°F (1914) | -24.0°F (1966) | 1.19 in (2006) |
| January 30 | 54.0°F (2013) | -26.0°F (1951) | 1.50 in (1983) |
| January 31 | 55.0°F (2025) | -25.1°F (2019) | 0.64 in (1915) |