December weather in Winnebago, IL
The average temperature in Winnebago in December is 27.3°F (20.2°F–34.3°F). Average precipitation: 1.93 inches. Average snowfall is 9.4 inches.
December is a winter month in Winnebago, and is cooler than the annual average of 49.4°F. Daily temperatures swing about 14.1°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 8h 55m. For travel, December is cold.
Avg High
34.3°F
Avg Low
20.2°F
Precipitation
1.93 in
Snow
9.4 in
December records in Winnebago
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 62.1°F (1970) | -2.9°F (1966) | 1.46 in (1985) |
| December 2 | 64.0°F (1982) | -4.0°F (1976) | 2.00 in (1982) |
| December 3 | 69.1°F (2012) | -2.0°F (1966) | 0.73 in (2011) |
| December 4 | 64.9°F (1998) | -4.0°F (1991) | 1.29 in (1973) |
| December 5 | 66.9°F (2001) | -5.1°F (2005) | 0.54 in (1999) |
| December 6 | 60.1°F (1980) | -9.9°F (1964) | 0.83 in (1998) |
| December 7 | 57.9°F (1980) | -11.0°F (1977) | 1.10 in (1980) |
| December 8 | 60.1°F (1991) | -6.0°F (1958) | 0.67 in (2009) |
| December 9 | 55.0°F (2020) | -11.9°F (1958) | 1.04 in (2003) |
| December 10 | 57.0°F (2015) | -17.0°F (1958) | 1.60 in (2003) |
| December 11 | 54.0°F (1965) | -18.0°F (1972) | 0.92 in (1996) |
| December 12 | 60.1°F (1991) | -9.0°F (2000) | 0.70 in (1991) |
| December 13 | 62.1°F (2015) | -14.1°F (1958) | 1.41 in (2015) |
| December 14 | 61.0°F (2015) | -11.0°F (1985) | 1.70 in (2022) |
| December 15 | 69.1°F (2021) | -16.1°F (1989) | 1.71 in (1971) |
| December 16 | 68.0°F (2021) | -11.0°F (1951) | 0.31 in (2008) |
| December 17 | 50.0°F (1977) | -11.0°F (1951) | 0.23 in (1963) |
| December 18 | 54.0°F (1957) | -17.0°F (1983) | 1.04 in (1957) |
| December 19 | 55.9°F (1988) | -20.9°F (1983) | 0.91 in (1987) |
| December 20 | 53.1°F (1967) | -20.0°F (1963) | 1.27 in (2012) |
| December 21 | 55.9°F (1967) | -20.0°F (1963) | 0.63 in (2015) |
| December 22 | 55.0°F (1957) | -18.9°F (1989) | 0.56 in (2013) |
| December 23 | 62.1°F (2020) | -20.9°F (1983) | 0.70 in (2015) |
| December 24 | 55.0°F (1982) | -24.0°F (1983) | 1.77 in (1965) |
| December 25 | 59.0°F (2019) | -22.0°F (2000) | 0.57 in (2023) |
| December 26 | 55.9°F (2019) | -13.0°F (1962) | 0.75 in (1988) |
| December 27 | 55.0°F (1959) | -13.0°F (1951) | 1.49 in (2008) |
| December 28 | 66.0°F (1984) | -9.9°F (1961) | 1.25 in (2015) |
| December 29 | 64.9°F (1984) | -11.0°F (1976) | 0.98 in (1972) |
| December 30 | 57.9°F (2002) | -11.9°F (1963) | 0.71 in (1992) |
| December 31 | 55.9°F (1965) | -17.0°F (1963) | 0.61 in (1978) |