December weather in Tolono, IL
The average temperature in Tolono in December is 31.3°F (23.6°F–39.1°F). Average precipitation: 2.14 inches.
December is a winter month in Tolono, and is cooler than the annual average of 52.5°F. Daily temperatures swing about 15.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 10m. For travel, December is cold.
Avg High
39.1°F
Avg Low
23.6°F
Precipitation
2.14 in
Daylight
9h 10m
December records in Tolono
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 63.0°F (2012) | 8.1°F (2002) | 1.01 in (2023) |
| December 2 | 66.9°F (2012) | 9.0°F (2005) | 0.37 in (2007) |
| December 3 | 73.0°F (2012) | 9.1°F (2006) | 0.19 in (2010) |
| December 4 | 71.1°F (1998) | 1.9°F (2025) | 0.40 in (2016) |
| December 5 | 66.0°F (2001) | 0.0°F (2025) | 0.72 in (1999) |
| December 6 | 70.0°F (1998) | 3.2°F (2010) | 0.41 in (1998) |
| December 7 | 55.9°F (2023) | -5.1°F (2005) | 1.04 in (2004) |
| December 8 | 59.0°F (2003) | -0.8°F (2010) | 0.51 in (2009) |
| December 9 | 57.9°F (2023) | 0.1°F (2010) | 0.56 in (2007) |
| December 10 | 64.0°F (2021) | -1.8°F (2013) | 0.62 in (2021) |
| December 11 | 63.0°F (2002) | 3.2°F (2013) | 0.90 in (2010) |
| December 12 | 66.9°F (2015) | -2.7°F (2013) | 0.45 in (2001) |
| December 13 | 64.0°F (2015) | -4.0°F (2025) | 0.64 in (2009) |
| December 14 | 64.0°F (2015) | -14.1°F (2025) | 1.48 in (2022) |
| December 15 | 63.0°F (2021) | -11.0°F (2025) | 0.24 in (2012) |
| December 16 | 63.0°F (2021) | 8.1°F (2000) | 0.92 in (2023) |
| December 17 | 53.1°F (2006) | 1.9°F (2000) | 0.34 in (2001) |
| December 18 | 55.0°F (2002) | -1.8°F (2016) | 0.84 in (2002) |
| December 19 | 55.0°F (1997) | -3.8°F (2016) | 0.72 in (2008) |
| December 20 | 59.0°F (2013) | -2.0°F (2000) | 0.71 in (2012) |
| December 21 | 59.0°F (2015) | 0.0°F (2000) | 0.94 in (2013) |
| December 22 | 53.1°F (2006) | -7.8°F (2022) | 0.70 in (2003) |
| December 23 | 63.0°F (2015) | -8.9°F (2022) | 0.85 in (2008) |
| December 24 | 63.0°F (2023) | -5.1°F (2000) | 0.91 in (2009) |
| December 25 | 61.0°F (2019) | -6.0°F (1999) | 0.30 in (2009) |
| December 26 | 63.0°F (2019) | -6.9°F (2017) | 2.11 in (2015) |
| December 27 | 62.1°F (2008) | -9.8°F (2017) | 1.55 in (2008) |
| December 28 | 68.0°F (2025) | 1.9°F (1999) | 1.87 in (2015) |
| December 29 | 59.0°F (2019) | 2.1°F (2009) | 1.46 in (2024) |
| December 30 | 59.0°F (2002) | 0.1°F (2017) | 0.56 in (2022) |
| December 31 | 64.9°F (2004) | -8.0°F (1998) | 1.92 in (2018) |