January weather in Waukesha, WI
The average temperature in Waukesha in January is 19.7°F (11.6°F–27.7°F). Average precipitation: 1.60 inches. Average snowfall is 10.4 inches.
January is a winter month in Waukesha, and is cooler than the annual average of 46.6°F. Daily temperatures swing about 16.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 10m. For travel, January is cold.
Avg High
27.7°F
Avg Low
11.6°F
Precipitation
1.60 in
Snow
10.4 in
January records in Waukesha
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 53.1°F (1897) | -15.0°F (1901) | 1.35 in (1948) |
| January 2 | 54.0°F (1897) | -15.0°F (1920) | 0.83 in (1937) |
| January 3 | 57.0°F (2000) | -16.1°F (1919) | 1.03 in (1999) |
| January 4 | 52.0°F (1998) | -20.9°F (1919) | 1.45 in (1982) |
| January 5 | 57.9°F (1997) | -20.9°F (1924) | 0.88 in (1946) |
| January 6 | 50.0°F (1933) | -23.1°F (1909) | 2.00 in (1918) |
| January 7 | 50.0°F (2008) | -24.0°F (1942) | 0.45 in (1913) |
| January 8 | 57.9°F (2008) | -24.0°F (1942) | 1.03 in (1937) |
| January 9 | 55.9°F (2026) | -18.9°F (1982) | 0.90 in (1930) |
| January 10 | 53.1°F (1939) | -25.1°F (1982) | 1.28 in (1975) |
| January 11 | 48.9°F (1980) | -18.0°F (1912) | 1.50 in (1918) |
| January 12 | 55.0°F (2012) | -20.9°F (1912) | 0.87 in (1966) |
| January 13 | 55.0°F (1961) | -27.9°F (2003) | 1.26 in (2024) |
| January 14 | 51.1°F (1928) | -18.0°F (1929) | 1.32 in (1940) |
| January 15 | 53.1°F (1953) | -24.0°F (2003) | 0.90 in (1906) |
| January 16 | 51.1°F (1949) | -22.0°F (1982) | 0.80 in (1924) |
| January 17 | 50.0°F (1913) | -25.1°F (1982) | 0.71 in (1941) |
| January 18 | 54.0°F (1996) | -27.0°F (1994) | 0.87 in (2020) |
| January 19 | 55.9°F (1996) | -26.0°F (1994) | 1.34 in (1907) |
| January 20 | 50.0°F (1968) | -26.0°F (1985) | 0.98 in (1974) |
| January 21 | 53.1°F (1934) | -20.9°F (1924) | 1.04 in (1906) |
| January 22 | 53.1°F (1964) | -23.1°F (1936) | 0.97 in (1909) |
| January 23 | 52.0°F (1909) | -23.1°F (1936) | 1.11 in (1965) |
| January 24 | 57.9°F (1967) | -24.0°F (1936) | 2.66 in (1938) |
| January 25 | 55.9°F (1973) | -27.0°F (1904) | 1.08 in (1950) |
| January 26 | 62.1°F (1944) | -20.0°F (1930) | 1.17 in (1974) |
| January 27 | 55.0°F (1916) | -17.0°F (1904) | 1.05 in (1916) |
| January 28 | 55.0°F (2002) | -23.1°F (1915) | 0.57 in (1994) |
| January 29 | 53.1°F (1914) | -22.0°F (1966) | 1.00 in (1909) |
| January 30 | 57.0°F (2013) | -27.0°F (1951) | 1.20 in (2013) |
| January 31 | 55.0°F (2025) | -20.0°F (1996) | 0.48 in (2021) |