Climate almanac
Mattoon
Illinois, United States · 39.48°, -88.37°
What is the weather like in Mattoon in January?
In January, Mattoon is typically 38°F (3°C) during the day and 24°F (-4°C) at night. The month brings about 3.0 in (77 mm) of precipitation in total. Snowfall averages about 4.2 in (108 mm) over the month.
- Average high38°F (3°C)
- Average low24°F (-4°C)
- Precipitation3.0 in (77 mm)
- Clear or mostly clear days7
- Snowfall4.2 in (108 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)