January weather in Portage, WI
The average temperature in Portage in January is 18.0°F (9.9°F–26.1°F). Average precipitation: 1.44 inches. Average snowfall is 10.2 inches.
January is a winter month in Portage, and is cooler than the annual average of 46.5°F. Daily temperatures swing about 16.2°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 6m. For travel, January is cold.
Avg High
26.1°F
Avg Low
9.9°F
Precipitation
1.44 in
Snow
10.2 in
January records in Portage
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 52.0°F (1897) | -20.9°F (1947) | 0.39 in (1978) |
| January 2 | 46.0°F (1998) | -20.9°F (1979) | 0.93 in (1941) |
| January 3 | 52.0°F (1897) | -23.1°F (1979) | 0.85 in (1906) |
| January 4 | 53.1°F (1998) | -27.0°F (1919) | 0.60 in (1910) |
| January 5 | 48.9°F (2007) | -27.0°F (1979) | 0.62 in (1922) |
| January 6 | 53.1°F (1933) | -25.1°F (1909) | 0.69 in (1946) |
| January 7 | 52.0°F (1939) | -32.1°F (1910) | 0.67 in (2019) |
| January 8 | 48.0°F (1928) | -26.0°F (1971) | 0.90 in (1937) |
| January 9 | 55.0°F (1939) | -29.9°F (1977) | 0.79 in (1889) |
| January 10 | 57.0°F (1939) | -25.1°F (1982) | 0.41 in (2024) |
| January 11 | 51.1°F (2012) | -31.0°F (1979) | 0.95 in (1890) |
| January 12 | 53.1°F (2012) | -29.9°F (1912) | 1.15 in (1898) |
| January 13 | 52.0°F (1961) | -27.9°F (1916) | 0.74 in (1890) |
| January 14 | 53.1°F (2026) | -24.0°F (1929) | 0.92 in (1940) |
| January 15 | 54.0°F (1953) | -35.0°F (1963) | 0.72 in (1906) |
| January 16 | 51.1°F (1933) | -29.0°F (1979) | 0.67 in (1969) |
| January 17 | 48.9°F (1913) | -27.0°F (1982) | 0.92 in (1915) |
| January 18 | 51.1°F (1973) | -29.9°F (1994) | 0.40 in (1907) |
| January 19 | 51.1°F (1996) | -32.1°F (1994) | 0.89 in (1973) |
| January 20 | 52.0°F (1906) | -31.0°F (1994) | 1.23 in (1988) |
| January 21 | 54.0°F (1964) | -26.0°F (1994) | 0.45 in (1993) |
| January 22 | 53.1°F (1964) | -33.0°F (1930) | 1.23 in (1917) |
| January 23 | 48.0°F (2002) | -27.9°F (1963) | 0.51 in (1965) |
| January 24 | 52.0°F (1981) | -23.1°F (1897) | 1.32 in (1967) |
| January 25 | 55.9°F (1944) | -27.9°F (1904) | 0.69 in (1938) |
| January 26 | 55.0°F (1973) | -31.0°F (1930) | 0.72 in (1950) |
| January 27 | 54.0°F (1973) | -23.1°F (1904) | 1.00 in (1954) |
| January 28 | 55.0°F (2002) | -23.1°F (1915) | 1.04 in (1949) |
| January 29 | 52.0°F (1914) | -26.0°F (1904) | 0.83 in (2006) |
| January 30 | 50.0°F (2013) | -29.9°F (1951) | 0.95 in (2001) |
| January 31 | 57.9°F (2025) | -29.0°F (2019) | 0.53 in (1937) |