Weather WorldIlliopolis, IL 7-Day Weather Forecast
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Illiopolis Weather Forecast
Illiopolis, IL Weather Forecast Date: 637 AM CDT Sat Oct 10 2026
Weather forecast for Illiopolis, IL
Today Hi: 81°FHi: 27°C Lo: 55°F Lo: 13°C |
Today... Partly sunny this morning, then becoming mostly cloudy. Highs in the lower 80s. Southeast winds 5 to 10 mph. |
Sun Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Sunday... Sunny. Highs in the mid 80s. Light and variable winds, becoming west around 5 mph in the afternoon. |
| Columbus Day Hi: 90°FHi: 32°C Lo: 70°F Lo: 21°C |
Columbus Day... Sunny. Highs around 90. Southwest winds 10 to 15 mph. |
| Tue Hi: 85°FHi: 29°C Lo: 60°F Lo: 16°C |
Tuesday... Mostly clear. Lows around 70. Highs in the mid 80s. |
Wed Hi: 79°FHi: 26°C Lo: 59°F Lo: 15°C |
Wednesday... Showers likely. Highs in the upper 70s. Chance of rain 70%. |
Thu Hi: 75°FHi: 24°C Lo: 51°F Lo: 11°C |
Thursday... Mostly cloudy with a chance of showers in the morning, then partly sunny with a chance of showers in the afternoon. Highs in the mid 70s. Chance of rain 50%. |
| Fri Hi: 69°FHi: 21°C |
Friday... Mostly sunny. Highs in the upper 60s. |
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