December weather in Portage, WI
The average temperature in Portage in December is 24.4°F (17.1°F–31.8°F). Average precipitation: 1.68 inches. Average snowfall is 8.9 inches.
December is a winter month in Portage, and is cooler than the annual average of 46.5°F. Daily temperatures swing about 14.7°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 8h 46m. For travel, December is cold.
Avg High
31.8°F
Avg Low
17.1°F
Precipitation
1.68 in
Snow
8.9 in
December records in Portage
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 62.1°F (1962) | -9.9°F (1976) | 0.84 in (1890) |
| December 2 | 64.9°F (1962) | -11.0°F (1976) | 1.81 in (1921) |
| December 3 | 63.0°F (1982) | -14.1°F (1940) | 0.53 in (1902) |
| December 4 | 64.0°F (1998) | -5.1°F (1977) | 1.28 in (1932) |
| December 5 | 63.0°F (2001) | -2.0°F (2005) | 0.79 in (1973) |
| December 6 | 64.0°F (2001) | -9.0°F (1977) | 0.68 in (1943) |
| December 7 | 60.1°F (1939) | -16.1°F (1972) | 1.42 in (1967) |
| December 8 | 60.1°F (1946) | -11.9°F (1917) | 0.95 in (1950) |
| December 9 | 60.1°F (1946) | -9.9°F (1910) | 1.25 in (1907) |
| December 10 | 57.0°F (1939) | -16.1°F (1919) | 0.95 in (1911) |
| December 11 | 57.0°F (2015) | -20.0°F (1972) | 1.01 in (2021) |
| December 12 | 57.9°F (1949) | -9.9°F (1962) | 1.60 in (1899) |
| December 13 | 57.9°F (1982) | -20.0°F (1903) | 0.56 in (2001) |
| December 14 | 57.9°F (1975) | -20.0°F (1901) | 1.40 in (2015) |
| December 15 | 54.0°F (2006) | -18.0°F (1922) | 1.36 in (2022) |
| December 16 | 66.9°F (2021) | -20.9°F (1932) | 1.01 in (1940) |
| December 17 | 52.0°F (1939) | -15.0°F (1972) | 0.51 in (1961) |
| December 18 | 53.1°F (1923) | -18.0°F (1922) | 0.93 in (1968) |
| December 19 | 53.1°F (2002) | -22.0°F (1983) | 0.63 in (2008) |
| December 20 | 53.1°F (2002) | -20.9°F (1985) | 0.90 in (2012) |
| December 21 | 54.0°F (1967) | -20.9°F (1989) | 0.52 in (1889) |
| December 22 | 50.0°F (1931) | -20.9°F (1989) | 0.52 in (1920) |
| December 23 | 54.0°F (2019) | -18.9°F (1983) | 0.78 in (1979) |
| December 24 | 54.0°F (2015) | -24.0°F (1983) | 0.60 in (2009) |
| December 25 | 57.0°F (1982) | -18.9°F (2000) | 0.95 in (2009) |
| December 26 | 54.0°F (2019) | -22.0°F (1914) | 0.53 in (2016) |
| December 27 | 50.0°F (1936) | -22.0°F (1933) | 1.50 in (1904) |
| December 28 | 60.1°F (1984) | -20.0°F (1924) | 1.37 in (1959) |
| December 29 | 50.0°F (2003) | -18.9°F (1976) | 1.10 in (2015) |
| December 30 | 55.0°F (2019) | -15.0°F (1976) | 1.20 in (1906) |
| December 31 | 57.0°F (1965) | -18.0°F (1967) | 0.57 in (1936) |