December weather in Hanover, IL
The average temperature in Hanover in December is 25.3°F (16.9°F–33.6°F). Average precipitation: 1.89 inches. Average snowfall is 6.9 inches.
December is a winter month in Hanover, and is cooler than the annual average of 47.5°F. Daily temperatures swing about 16.7°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 8h 55m. For travel, December is cold.
Avg High
33.6°F
Avg Low
16.9°F
Precipitation
1.89 in
Snow
6.9 in
December records in Hanover
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.9°F (1998) | 3.9°F (2025) | 1.12 in (2007) |
| December 2 | 60.1°F (1998) | 3.9°F (1985) | 1.42 in (2018) |
| December 3 | 62.1°F (2012) | -11.0°F (1985) | 0.58 in (2010) |
| December 4 | 66.0°F (2012) | -7.1°F (1991) | 0.76 in (2011) |
| December 5 | 68.0°F (1998) | -8.0°F (2007) | 0.31 in (2016) |
| December 6 | 66.9°F (2001) | -11.0°F (2005) | 0.39 in (2004) |
| December 7 | 55.0°F (1998) | -13.0°F (2005) | 0.43 in (2025) |
| December 8 | 52.0°F (2024) | -7.1°F (2025) | 0.80 in (2009) |
| December 9 | 55.0°F (2023) | -4.0°F (1995) | 0.66 in (2022) |
| December 10 | 54.0°F (2020) | -9.9°F (2013) | 0.54 in (2007) |
| December 11 | 55.0°F (2015) | -4.0°F (1994) | 0.66 in (2021) |
| December 12 | 50.0°F (1987) | -11.9°F (1985) | 1.09 in (2020) |
| December 13 | 61.0°F (2015) | -16.1°F (2000) | 0.55 in (2001) |
| December 14 | 61.0°F (2015) | -18.0°F (1985) | 2.04 in (2015) |
| December 15 | 55.9°F (2021) | -18.0°F (1985) | 0.93 in (2022) |
| December 16 | 71.1°F (2021) | -17.0°F (1989) | 0.97 in (1992) |
| December 17 | 55.0°F (1984) | -17.0°F (1989) | 0.22 in (2023) |
| December 18 | 44.1°F (1997) | -16.1°F (1985) | 2.73 in (2008) |
| December 19 | 48.9°F (1998) | -20.9°F (1985) | 0.18 in (2025) |
| December 20 | 54.0°F (1988) | -20.9°F (1985) | 1.15 in (1987) |
| December 21 | 48.0°F (1988) | -17.0°F (1989) | 0.78 in (2012) |
| December 22 | 46.9°F (1994) | -17.0°F (1989) | 0.73 in (2007) |
| December 23 | 52.0°F (2019) | -26.0°F (1989) | 0.93 in (2009) |
| December 24 | 55.9°F (2015) | -26.0°F (1989) | 1.39 in (2009) |
| December 25 | 54.0°F (2023) | -29.0°F (2000) | 0.80 in (2008) |
| December 26 | 57.9°F (2019) | -29.0°F (2000) | 0.41 in (2016) |
| December 27 | 50.0°F (2008) | -11.0°F (1990) | 1.35 in (1988) |
| December 28 | 54.0°F (1984) | -13.0°F (2000) | 0.66 in (2024) |
| December 29 | 64.9°F (1984) | -13.0°F (2000) | 1.22 in (2015) |
| December 30 | 59.0°F (2022) | -11.0°F (2013) | 0.75 in (2020) |
| December 31 | 55.9°F (2004) | -11.0°F (2013) | 0.25 in (1992) |