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Lake Jacksonville, IL 7-Day Weather Forecast
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Lake Jacksonville Weather Forecast
Lake Jacksonville, IL Weather Forecast Date: 507 AM CDT Tue Sep 01 2026
Weather forecast for Lake Jacksonville, IL
Today Hi: 99°FHi: 37°C Lo: 79°F Lo: 26°C |
Today... Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 104. |
| Wed Hi: 99°FHi: 37°C Lo: 79°F Lo: 26°C |
Wednesday... Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 105. |
| Thu Hi: 99°FHi: 37°C Lo: 75°F Lo: 24°C |
Thursday... Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 105. |
| Fri Hi: 99°FHi: 37°C Lo: 75°F Lo: 24°C |
Friday... Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. |
| Fri Hi: 99°FHi: 37°C Lo: 75°F Lo: 24°C |
Friday... Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. |
| Sat Hi: 99°FHi: 37°C Lo: 71°F Lo: 22°C |
Saturday... Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 100. |
Sun Hi: 91°FHi: 33°C Lo: 69°F Lo: 21°C |
Sunday... Partly cloudy. Highs in the lower 90s. Lows in the upper 60s. |
| Mon Hi: 91°FHi: 33°C Lo: 69°F Lo: 21°C |
Monday... Partly cloudy. Highs in the lower 90s. Lows in the upper 60s. |
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