December weather in Lockport, IL
The average temperature in Lockport in December is 29.4°F (22.0°F–36.8°F). Average precipitation: 2.15 inches. Average snowfall is 7.5 inches.
December is a winter month in Lockport, and is cooler than the annual average of 50.9°F. Daily temperatures swing about 14.8°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 8h 60m. For travel, December is cold.
Avg High
36.8°F
Avg Low
22.0°F
Precipitation
2.15 in
Snow
7.5 in
December records in Lockport
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 59.0°F (2012) | 10.9°F (2002) | 1.19 in (2006) |
| December 2 | 64.0°F (2012) | 9.0°F (2024) | 0.27 in (2007) |
| December 3 | 71.1°F (2012) | 8.1°F (2006) | 0.46 in (1999) |
| December 4 | 66.9°F (1998) | 1.0°F (2025) | 0.94 in (1999) |
| December 5 | 66.9°F (2001) | 1.0°F (2005) | 0.76 in (1999) |
| December 6 | 60.1°F (1998) | 1.0°F (2007) | 1.19 in (1998) |
| December 7 | 52.0°F (2023) | -5.1°F (2005) | 0.94 in (2004) |
| December 8 | 55.9°F (2024) | 1.9°F (2006) | 0.59 in (2009) |
| December 9 | 54.0°F (1999) | 0.0°F (2013) | 1.03 in (2008) |
| December 10 | 60.1°F (2021) | -4.0°F (2013) | 1.05 in (2021) |
| December 11 | 57.9°F (2021) | -6.0°F (2013) | 0.74 in (2020) |
| December 12 | 60.1°F (2015) | -9.0°F (2013) | 0.76 in (2020) |
| December 13 | 62.1°F (2015) | -8.0°F (2000) | 0.90 in (2015) |
| December 14 | 60.1°F (2015) | -2.9°F (2025) | 1.74 in (2022) |
| December 15 | 64.0°F (2021) | -2.0°F (2016) | 0.31 in (2012) |
| December 16 | 64.0°F (2021) | 5.0°F (2009) | 0.60 in (2023) |
| December 17 | 55.9°F (2006) | -4.0°F (2000) | 0.14 in (2001) |
| December 18 | 55.0°F (2002) | -11.9°F (2016) | 1.02 in (2002) |
| December 19 | 55.0°F (2002) | -11.9°F (2016) | 0.80 in (2008) |
| December 20 | 50.0°F (2012) | -8.0°F (2000) | 1.26 in (2012) |
| December 21 | 53.1°F (2015) | -8.0°F (2000) | 0.75 in (2015) |
| December 22 | 53.1°F (2006) | -11.0°F (2000) | 0.82 in (2006) |
| December 23 | 59.0°F (2015) | -10.8°F (2022) | 0.58 in (2009) |
| December 24 | 55.9°F (2021) | -9.9°F (2000) | 0.89 in (1997) |
| December 25 | 61.0°F (2019) | -11.0°F (2000) | 0.47 in (2023) |
| December 26 | 62.1°F (2019) | -7.1°F (2017) | 0.28 in (2015) |
| December 27 | 61.0°F (2008) | -9.0°F (2017) | 1.71 in (2008) |
| December 28 | 59.0°F (2025) | -2.0°F (2017) | 2.17 in (2015) |
| December 29 | 57.9°F (2022) | 5.0°F (2009) | 0.67 in (2019) |
| December 30 | 60.1°F (2002) | -5.1°F (2017) | 0.43 in (2011) |
| December 31 | 57.9°F (2006) | -4.0°F (2017) | 1.57 in (2010) |