January weather in West Allis, WI
The average temperature in West Allis in January is 22.8°F (14.7°F–30.8°F). Average precipitation: 2.23 inches. Average snowfall is 13.5 inches.
January is a winter month in West Allis, and is cooler than the annual average of 49.1°F. Daily temperatures swing about 16.1°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 10m. For travel, January is cold.
Avg High
30.8°F
Avg Low
14.7°F
Precipitation
2.23 in
Snow
13.5 in
January records in West Allis
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 52.0°F (2005) | -11.0°F (1968) | 0.40 in (1978) |
| January 2 | 46.0°F (2000) | -11.9°F (1979) | 0.88 in (2005) |
| January 3 | 55.9°F (2000) | -13.0°F (1979) | 0.82 in (1971) |
| January 4 | 51.1°F (2007) | -8.0°F (1959) | 0.57 in (1982) |
| January 5 | 50.0°F (2007) | -13.0°F (1979) | 0.69 in (1955) |
| January 6 | 52.0°F (2007) | -9.0°F (1979) | 0.75 in (2005) |
| January 7 | 52.0°F (2008) | -11.9°F (1968) | 0.19 in (2009) |
| January 8 | 55.9°F (1965) | -11.0°F (1976) | 0.58 in (2010) |
| January 9 | 57.9°F (2026) | -17.0°F (1982) | 0.47 in (2024) |
| January 10 | 55.9°F (2002) | -22.0°F (1982) | 1.14 in (1975) |
| January 11 | 51.1°F (1980) | -13.0°F (1979) | 0.55 in (2008) |
| January 12 | 48.9°F (2002) | -11.9°F (1974) | 1.58 in (1960) |
| January 13 | 55.0°F (2006) | -11.9°F (1963) | 2.27 in (2024) |
| January 14 | 54.0°F (2026) | -16.1°F (1963) | 0.73 in (1952) |
| January 15 | 55.0°F (1953) | -20.9°F (1963) | 0.43 in (2007) |
| January 16 | 50.0°F (1973) | -20.9°F (1982) | 0.43 in (1980) |
| January 17 | 52.0°F (1973) | -23.1°F (1982) | 0.39 in (1953) |
| January 18 | 55.0°F (1973) | -18.9°F (1967) | 1.28 in (1960) |
| January 19 | 48.0°F (1973) | -23.1°F (1985) | 0.73 in (1952) |
| January 20 | 51.1°F (2006) | -26.0°F (1985) | 0.31 in (1954) |
| January 21 | 54.0°F (1957) | -18.9°F (1963) | 0.53 in (1959) |
| January 22 | 55.0°F (1964) | -15.0°F (1963) | 1.12 in (2005) |
| January 23 | 52.0°F (2002) | -24.0°F (1963) | 0.77 in (1965) |
| January 24 | 55.0°F (1967) | -16.1°F (2026) | 1.08 in (1964) |
| January 25 | 57.0°F (1973) | -13.0°F (2026) | 0.32 in (1976) |
| January 26 | 57.0°F (1973) | -6.0°F (1955) | 0.95 in (1974) |
| January 27 | 53.1°F (2002) | -13.0°F (1966) | 0.21 in (2004) |
| January 28 | 57.0°F (2002) | -18.0°F (1966) | 0.30 in (2005) |
| January 29 | 48.0°F (1968) | -23.1°F (1966) | 1.32 in (2006) |
| January 30 | 48.0°F (1974) | -18.0°F (1966) | 0.82 in (2001) |
| January 31 | 57.0°F (2025) | -9.0°F (1963) | 0.81 in (2002) |