December weather in Lerna, IL
The average temperature in Lerna in December is 33.0°F (26.0°F–40.0°F). Average precipitation: 1.84 inches.
December is a winter month in Lerna, and is cooler than the annual average of 53.4°F. Daily temperatures swing about 14°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 14m. For travel, December is cold.
Avg High
40.0°F
Avg Low
26.0°F
Precipitation
1.84 in
Daylight
9h 14m
December records in Lerna
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 61.0°F (2012) | 12.0°F (2002) | 0.49 in (2018) |
| December 2 | 66.0°F (2012) | 12.9°F (2005) | 0.32 in (2007) |
| December 3 | 70.0°F (2012) | 14.2°F (2006) | 0.22 in (2023) |
| December 4 | 71.1°F (1998) | 6.1°F (2025) | 0.67 in (2011) |
| December 5 | 64.9°F (1998) | 3.0°F (2025) | 0.48 in (2014) |
| December 6 | 71.1°F (1998) | 11.1°F (2010) | 0.36 in (2004) |
| December 7 | 59.0°F (2004) | 3.9°F (2005) | 0.90 in (2004) |
| December 8 | 59.0°F (2024) | 6.3°F (2006) | 0.50 in (2009) |
| December 9 | 59.0°F (2023) | 7.0°F (2005) | 1.05 in (2012) |
| December 10 | 66.0°F (2021) | 6.3°F (2013) | 0.79 in (2021) |
| December 11 | 64.0°F (2021) | 3.2°F (2013) | 0.68 in (2000) |
| December 12 | 66.9°F (2015) | 0.1°F (2013) | 0.55 in (2001) |
| December 13 | 66.0°F (2015) | 0.0°F (2025) | 0.52 in (2000) |
| December 14 | 64.9°F (2015) | -9.0°F (2025) | 1.25 in (2022) |
| December 15 | 62.1°F (2021) | -5.1°F (2025) | 0.43 in (2007) |
| December 16 | 64.0°F (2021) | 7.0°F (2000) | 0.98 in (2023) |
| December 17 | 59.0°F (2006) | 1.9°F (2000) | 0.59 in (2001) |
| December 18 | 57.0°F (2002) | 2.1°F (2016) | 0.42 in (2002) |
| December 19 | 55.0°F (2002) | -0.8°F (2016) | 0.50 in (2008) |
| December 20 | 61.0°F (2013) | -2.9°F (2000) | 1.26 in (2012) |
| December 21 | 55.9°F (2015) | 1.2°F (2008) | 1.23 in (2013) |
| December 22 | 54.0°F (2006) | -7.8°F (2022) | 0.72 in (2003) |
| December 23 | 63.0°F (2015) | -8.9°F (2022) | 0.82 in (2008) |
| December 24 | 62.1°F (2021) | -5.1°F (2000) | 0.87 in (2009) |
| December 25 | 63.0°F (2021) | -7.1°F (2000) | 0.54 in (2021) |
| December 26 | 64.0°F (2019) | 1.2°F (2017) | 2.84 in (2015) |
| December 27 | 64.9°F (2008) | -2.7°F (2017) | 1.21 in (2008) |
| December 28 | 59.0°F (2019) | 1.9°F (2000) | 1.69 in (2021) |
| December 29 | 61.0°F (2019) | 8.2°F (2009) | 1.03 in (2019) |
| December 30 | 57.9°F (2002) | 2.1°F (2017) | 1.00 in (2022) |
| December 31 | 64.9°F (2004) | -1.8°F (2017) | 0.90 in (2018) |