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Cornwall, IL 7-Day Weather Forecast
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Cornwall Weather Forecast
Cornwall, IL Weather Forecast Date: 916 AM CDT Fri Sep 04 2026
Weather forecast for Cornwall, IL
Today Hi: 95°FHi: 35°C Lo: 71°F Lo: 22°C |
Rest of Today... Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. |
| Sat Hi: 91°FHi: 33°C Lo: 69°F Lo: 21°C |
Saturday... Sunny, hot with highs in the lower 90s. North winds 5 to 10 mph. Heat index values up to 102. |
| Sun Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Sunday... Mostly sunny. Humid with highs in the mid 80s. East winds 5 to 10 mph. |
Mon Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Monday... Partly cloudy. Lows in the mid 60s. Highs in the mid 80s. |
| Mon Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Monday... Partly cloudy. Lows in the mid 60s. Highs in the mid 80s. |
| Tue Hi: 91°FHi: 33°C Lo: 75°F Lo: 24°C |
Tuesday... Partly cloudy. Hot. Highs in the lower 90s. Lows in the mid 70s. |
| Wed Hi: 91°FHi: 33°C Lo: 75°F Lo: 24°C |
Wednesday... Partly cloudy. Hot. Highs in the lower 90s. Lows in the mid 70s. |
| Wed Hi: 91°FHi: 33°C Lo: 70°F Lo: 21°C |
Wednesday... Partly cloudy. Hot. Highs in the lower 90s. Lows in the mid 70s. |
Cornwall Radar Loop
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