Climate almanac
Greenville
Illinois, United States · 38.89°, -89.41°
What is the weather like in Greenville in December?
In December, Greenville is typically 45°F (7°C) during the day and 31°F (-1°C) at night. The month brings about 2.6 in (66 mm) of precipitation in total. Snowfall averages about 1.7 in (43 mm) over the month.
- Average high45°F (7°C)
- Average low31°F (-1°C)
- Precipitation2.6 in (66 mm)
- Clear or mostly clear days8
- Snowfall1.7 in (43 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)