Climate almanac
Fairfield
Illinois, United States · 42.22°, -88.06°
What is the weather like in Fairfield in December?
In December, Fairfield is typically 38°F (3°C) during the day and 27°F (-3°C) at night. The month brings about 2.4 in (62 mm) of precipitation in total. Snowfall averages about 4.5 in (114 mm) over the month.
- Average high38°F (3°C)
- Average low27°F (-3°C)
- Precipitation2.4 in (62 mm)
- Clear or mostly clear days5
- Snowfall4.5 in (114 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)