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Roundhouse Lake, IL 7-Day Weather Forecast
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Roundhouse Lake Weather Forecast
Roundhouse Lake, IL Weather Forecast Date: 437 PM CDT Sun Aug 30 2026
Weather forecast for Roundhouse Lake, IL
Tonight Lo: 71°F Lo: 22°C |
Tonight... Partly cloudy. Lows in the lower 70s. South winds 5 to 10 mph with gusts up to 25 mph. |
Mon Hi: 91°FHi: 33°C Lo: 75°F Lo: 24°C |
Monday... Mostly sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph. Heat index values up to 102 in the afternoon. |
| Tue Hi: 95°FHi: 35°C Lo: 75°F Lo: 24°C |
Tuesday... Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107 in the afternoon. |
| Wed Hi: 95°FHi: 35°C Lo: 75°F Lo: 24°C |
Wednesday... Mostly clear. Hot. Highs in the mid 90s. Lows in the mid 70s. |
| Thu Hi: 90°FHi: 32°C Lo: 71°F Lo: 22°C |
Thursday... Mostly sunny. Highs around 90. Heat index values up to 100. |
| Fri Hi: 89°FHi: 32°C Lo: 69°F Lo: 21°C |
Friday... Mostly sunny. Highs in the upper 80s. |
| Sat Hi: 85°FHi: 29°C Lo: 69°F Lo: 21°C |
Saturday... Mostly clear. Lows in the upper 60s. Highs in the mid 80s. |
| Sun Hi: 85°FHi: 29°C Lo: 69°F Lo: 21°C |
Sunday... Mostly clear. Lows in the upper 60s. Highs in the mid 80s. |
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