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Village of Caseyville, ILCaseyville, IL 7-Day Weather Forecast
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Caseyville Weather Forecast
Caseyville, IL Weather Forecast Date: 908 AM CDT Tue Sep 15 2026
Weather forecast for Caseyville, IL
Today Hi: 99°FHi: 37°C Lo: 71°F Lo: 22°C |
Rest of Today... Sunny. Isolated showers and thunderstorms this afternoon. Warmer with highs in the upper 90s. Southwest winds 5 to 10 mph. Chance of rain 20%. Heat index values up to 107. |
Wed Hi: 95°FHi: 35°C Lo: 75°F Lo: 24°C |
Wednesday... Partly sunny. A chance of showers and thunderstorms in the morning. Hot with highs in the mid 90s. East winds around 5 mph, becoming south in the afternoon. Chance of rain 40%. Heat index values up to 107. |
Thu Hi: 99°FHi: 37°C Lo: 71°F Lo: 22°C |
Thursday... Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph, becoming northwest around 5 mph in the afternoon. Heat index values up to 106. |
| Fri Hi: 95°FHi: 35°C Lo: 71°F Lo: 22°C |
Friday... Mostly clear. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 100. |
| Fri Hi: 95°FHi: 35°C Lo: 71°F Lo: 22°C |
Friday... Mostly clear. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 100. |
| Sat Hi: 95°FHi: 35°C Lo: 69°F Lo: 21°C |
Saturday... Mostly sunny. Highs in the mid 90s. |
| Sun Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Sunday... Partly sunny with a chance of showers and thunderstorms. Cooler with highs in the mid 80s. Chance of rain 40%. |
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