Climate almanac
Lemont
Illinois, United States · 41.67°, -88.00°
What is the weather like in Lemont in December?
In December, Lemont is typically 39°F (4°C) during the day and 26°F (-3°C) at night. The month brings about 2.3 in (59 mm) of precipitation in total. Snowfall averages about 3.5 in (88 mm) over the month.
- Average high39°F (4°C)
- Average low26°F (-3°C)
- Precipitation2.3 in (59 mm)
- Clear or mostly clear days6
- Snowfall3.5 in (88 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)