Illiopolis Weather Forecast
- 54
- 70
Increasing Clouds
- 63
- 75
Rain Showers
- 57
- 79
Rain Showers
- 56
- 79
Rain Showers
- 50
- 72
Chance Rain Showers
- 46
- 64
Chance Thunderstorms
Today 5 May Sangamon
Mostly sunny. Cooler with Highs in the lower 70s. Northeast Winds around 5 Mph.
Tonight 5 May Sangamon
Mostly cloudy. A slight chance of Showers after midnight. Lows in the mid 50s. East Winds 5 to 10 Mph. Chance of rain 20 percent.
Illiopolis Temperature Statistics
May Temperature
Decatur Airport (19.3 miles)
Lowest 2 May, 2024
55.9 °FAverage May
68.6 °FHighest 2 May, 2024
84 °F
Climate (2019–Present)
Decatur Airport (19.3 miles)
Take a look at our website widgetsAvailable free! Find Out MoreAverage Low 2019–2024
44.8 °FAverage 2019–2024
54.5 °FAverage High 2019–2024
64 °F