January weather in Mequon, WI
The average temperature in Mequon in January is 19.3°F (11.3°F–27.3°F). Average precipitation: 1.57 inches. Average snowfall is 16.5 inches.
January is a winter month in Mequon, and is cooler than the annual average of 45.8°F. Daily temperatures swing about 16°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 8m. For travel, January is cold.
Avg High
27.3°F
Avg Low
11.3°F
Precipitation
1.57 in
Snow
16.5 in
January records in Mequon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 55.0°F (2005) | -15.0°F (1947) | 0.44 in (1985) |
| January 2 | 45.0°F (1950) | -17.0°F (1979) | 0.90 in (2005) |
| January 3 | 54.0°F (2000) | -17.0°F (1979) | 0.95 in (1999) |
| January 4 | 52.0°F (1998) | -14.1°F (1977) | 0.67 in (1971) |
| January 5 | 50.0°F (2007) | -20.9°F (1979) | 0.89 in (1946) |
| January 6 | 48.9°F (2007) | -20.9°F (1988) | 0.41 in (2026) |
| January 7 | 51.1°F (2008) | -18.9°F (2014) | 0.36 in (1998) |
| January 8 | 55.9°F (2008) | -24.0°F (1971) | 0.73 in (2019) |
| January 9 | 55.9°F (2026) | -20.9°F (1971) | 0.93 in (1998) |
| January 10 | 52.0°F (2002) | -40.0°F (1982) | 0.63 in (1975) |
| January 11 | 53.1°F (2018) | -40.0°F (1982) | 0.47 in (2017) |
| January 12 | 55.0°F (2018) | -23.1°F (1979) | 0.86 in (1960) |
| January 13 | 54.0°F (1961) | -15.0°F (1974) | 1.24 in (2005) |
| January 14 | 53.1°F (2026) | -17.0°F (1994) | 0.69 in (1995) |
| January 15 | 52.0°F (1949) | -24.0°F (1972) | 0.53 in (2002) |
| January 16 | 52.0°F (1949) | -25.1°F (1972) | 0.75 in (1969) |
| January 17 | 52.0°F (1990) | -29.9°F (1982) | 0.40 in (1980) |
| January 18 | 52.0°F (1996) | -27.0°F (1994) | 0.51 in (2020) |
| January 19 | 52.0°F (1973) | -27.9°F (1994) | 0.45 in (1952) |
| January 20 | 52.0°F (1968) | -29.0°F (1985) | 1.58 in (1988) |
| January 21 | 54.0°F (1964) | -27.9°F (1985) | 0.60 in (1993) |
| January 22 | 54.0°F (2017) | -22.0°F (1963) | 1.28 in (1999) |
| January 23 | 50.0°F (1967) | -25.1°F (1963) | 0.69 in (2018) |
| January 24 | 46.9°F (1947) | -18.0°F (1948) | 0.59 in (1999) |
| January 25 | 57.0°F (1950) | -16.1°F (2026) | 1.13 in (1950) |
| January 26 | 55.0°F (1973) | -13.0°F (1946) | 0.35 in (1965) |
| January 27 | 55.9°F (1973) | -22.0°F (2019) | 0.82 in (1974) |
| January 28 | 54.0°F (2002) | -20.0°F (2019) | 0.30 in (1949) |
| January 29 | 46.0°F (1968) | -24.0°F (1966) | 0.98 in (2006) |
| January 30 | 57.9°F (2013) | -29.9°F (1951) | 0.91 in (2013) |
| January 31 | 57.0°F (2025) | -29.0°F (2019) | 0.30 in (2002) |