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City of Chillicothe, ILChillicothe, IL 7-Day Weather Forecast
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Chillicothe Weather Forecast
Chillicothe, IL Weather Forecast Date: 912 AM CDT Tue Sep 15 2026
Weather forecast for Chillicothe, IL
Today Hi: 89°FHi: 32°C Lo: 65°F Lo: 18°C |
Rest of Today... Mostly sunny. A slight chance of showers late this morning, then a chance of showers and thunderstorms this afternoon. Warmer with highs in the upper 80s. Southwest winds around 10 mph, becoming west this afternoon. Chance of rain 50%. |
| Wed Hi: 81°FHi: 27°C Lo: 69°F Lo: 21°C |
Wednesday... A slight chance of thunderstorms. Showers likely. Highs in the lower 80s. Northeast winds 5 to 10 mph. Chance of rain 70%. |
Thu Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Thursday... Partly sunny. A chance of showers in the morning. Humid with highs in the mid 80s. Southwest winds around 5 mph, becoming northwest in the afternoon. Chance of rain 50%. |
| Fri Hi: 85°FHi: 29°C Lo: 69°F Lo: 21°C |
Friday... Mostly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50%. |
Sat Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Saturday... Mostly sunny with a chance of showers. Highs in the mid 80s. Chance of rain 30%. |
| Sun Hi: 75°FHi: 24°C Lo: 59°F Lo: 15°C |
Sunday... Partly sunny with a chance of showers. Highs in the mid 70s. Chance of rain 40%. |
Mon Hi: 71°FHi: 22°C |
Monday... Mostly sunny. Highs in the lower 70s. |
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