Climate almanac
Decatur
Illinois, United States · 39.84°, -88.95°
What is the weather like in Decatur in June?
In June, Decatur is typically 85°F (29°C) during the day and 66°F (19°C) at night. The month brings about 4.1 in (105 mm) of precipitation in total.
- Average high85°F (29°C)
- Average low66°F (19°C)
- Precipitation4.1 in (105 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)