Climate almanac
Chester
Illinois, United States · 37.91°, -89.82°
What is the weather like in Chester in December?
In December, Chester is typically 49°F (9°C) during the day and 33°F (1°C) at night. The month brings about 3.1 in (78 mm) of precipitation in total. Snowfall averages about 1.0 in (24 mm) over the month.
- Average high49°F (9°C)
- Average low33°F (1°C)
- Precipitation3.1 in (78 mm)
- Clear or mostly clear days8
- Snowfall1.0 in (24 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)