10-Day Weather Forecasts & Weekend Weather for Decatur, IL | WeatherBug

Partly sunny with a chance of showers and thunderstorms. Near steady temperature in the upper 80s. South winds around 5 mph. Chance of rain 50 percent. Heat index values up to 102. Mostly cloudy. A chance of showers and thunderstorms in the evening then a slight chance of showers after midnight. Humid with lows in the lower 70s.

https://www.weatherbug.com/weather-forecast/10-day-weather/decatur-il-62526