Climate almanac
Mattoon
Illinois, United States · 39.48°, -88.37°
What is the weather like in Mattoon in May?
In May, Mattoon is typically 76°F (24°C) during the day and 57°F (14°C) at night. The month brings about 4.4 in (112 mm) of precipitation in total.
- Average high76°F (24°C)
- Average low57°F (14°C)
- Precipitation4.4 in (112 mm)
- Clear or mostly clear days8
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)