December weather in Lake Delton, WI
The average temperature in Lake Delton in December is 23.5°F (15.2°F–31.9°F). Average precipitation: 1.77 inches. Average snowfall is 8.7 inches.
December is a winter month in Lake Delton, and is cooler than the annual average of 45.7°F. Daily temperatures swing about 16.7°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 8h 46m. For travel, December is cold.
Avg High
31.9°F
Avg Low
15.2°F
Precipitation
1.77 in
Snow
8.7 in
December records in Lake Delton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 66.0°F (1998) | -7.1°F (1976) | 1.67 in (2007) |
| December 2 | 63.0°F (1982) | -16.1°F (1985) | 1.24 in (2018) |
| December 3 | 62.1°F (1951) | -24.0°F (1940) | 0.48 in (1955) |
| December 4 | 63.0°F (2012) | -8.0°F (2025) | 0.84 in (1925) |
| December 5 | 62.1°F (2001) | -14.1°F (2007) | 0.86 in (1982) |
| December 6 | 63.0°F (2001) | -13.0°F (2007) | 0.37 in (1943) |
| December 7 | 53.1°F (1946) | -16.1°F (1972) | 1.15 in (1927) |
| December 8 | 61.0°F (1946) | -11.9°F (1927) | 0.78 in (1966) |
| December 9 | 57.9°F (1946) | -14.1°F (1927) | 1.15 in (2009) |
| December 10 | 53.1°F (1979) | -15.0°F (1958) | 0.59 in (1970) |
| December 11 | 59.0°F (1949) | -15.0°F (1972) | 0.93 in (1965) |
| December 12 | 53.1°F (1968) | -15.0°F (1927) | 1.05 in (2010) |
| December 13 | 55.0°F (1975) | -15.0°F (1985) | 0.97 in (2015) |
| December 14 | 57.9°F (1975) | -17.0°F (2010) | 1.90 in (2015) |
| December 15 | 53.1°F (1998) | -18.9°F (2010) | 1.38 in (2022) |
| December 16 | 66.9°F (2021) | -20.9°F (1985) | 0.55 in (2014) |
| December 17 | 54.0°F (1984) | -20.9°F (1985) | 0.37 in (2016) |
| December 18 | 52.0°F (2002) | -22.0°F (1985) | 0.58 in (1957) |
| December 19 | 54.0°F (1923) | -24.0°F (1985) | 0.99 in (1968) |
| December 20 | 48.0°F (1923) | -23.1°F (1985) | 0.81 in (2012) |
| December 21 | 54.0°F (1967) | -22.0°F (1989) | 0.68 in (2006) |
| December 22 | 52.0°F (1957) | -22.0°F (1989) | 0.47 in (1968) |
| December 23 | 54.0°F (2019) | -22.0°F (1989) | 0.65 in (2014) |
| December 24 | 55.0°F (2015) | -24.0°F (1951) | 0.70 in (2009) |
| December 25 | 55.0°F (1982) | -26.0°F (2000) | 1.10 in (2009) |
| December 26 | 51.1°F (2023) | -27.0°F (2000) | 0.73 in (1988) |
| December 27 | 50.0°F (2008) | -23.1°F (1950) | 1.07 in (1959) |
| December 28 | 50.0°F (1984) | -20.9°F (1924) | 1.00 in (1987) |
| December 29 | 61.0°F (1984) | -18.9°F (2000) | 1.34 in (2015) |
| December 30 | 55.0°F (2004) | -18.0°F (2013) | 0.61 in (1971) |
| December 31 | 57.9°F (1965) | -23.1°F (1946) | 0.80 in (1923) |