Weather WorldFort Chartres State Park, IL 7-Day Weather Forecast
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Fort Chartres State Park Weather Forecast
Fort Chartres State Park, IL Weather Forecast Date: 757 AM CDT Thu Aug 27 2026
Weather forecast for Fort Chartres State Park, IL
Today Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Today... Sunny. Highs in the mid 80s. North winds 5 to 10 mph. |
| Fri Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Friday... Sunny. Highs in the mid 80s. North winds around 5 mph. |
| Sat Hi: 89°FHi: 32°C Lo: 65°F Lo: 18°C |
Saturday... Sunny. Highs in the upper 80s. South winds around 5 mph. |
| Sun Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Sunday... Mostly clear. Lows in the mid 60s. Highs in the lower 90s. |
| Mon Hi: 95°FHi: 35°C Lo: 71°F Lo: 22°C |
Monday... Mostly clear. Hot. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 105. |
| Tue Hi: 95°FHi: 35°C Lo: 71°F Lo: 22°C |
Tuesday... Mostly clear. Hot. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 105. |
| Wed Hi: 95°FHi: 35°C Lo: 71°F Lo: 22°C |
Wednesday... Mostly clear. Hot. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 105. |
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