Weather WorldBoulder Lake, IL 7-Day Weather Forecast
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Boulder Lake Weather Forecast
Boulder Lake, IL Weather Forecast Date: 627 PM CDT Wed Sep 30 2026
Weather forecast for Boulder Lake, IL
Tonight Lo: 71°F Lo: 22°C |
Tonight... Partly cloudy this evening, then becoming mostly cloudy. Lows in the lower 70s. South winds 5 to 10 mph. |
Thu Hi: 90°FHi: 32°C Lo: 65°F Lo: 18°C |
Thursday... Partly sunny in the morning, then becoming mostly cloudy. Highs around 90. Southwest winds 10 to 15 mph. |
Fri Hi: 71°FHi: 22°C Lo: 51°F Lo: 11°C |
Friday... Showers in the morning. Cooler with highs in the lower 70s. North winds 10 to 15 mph. Chance of rain 80%. |
Sat Hi: 71°FHi: 22°C Lo: 50°F Lo: 10°C |
Saturday... Sunny. Highs in the lower 70s. |
Sun Hi: 75°FHi: 24°C Lo: 45°F Lo: 7°C |
Sunday... Partly cloudy. Lows around 50. Highs in the mid 70s. |
| Mon Hi: 71°FHi: 22°C Lo: 49°F Lo: 9°C |
Monday... Clear. Highs in the lower 70s. Lows in the mid 40s. |
| Tue Hi: 70°FHi: 21°C Lo: 49°F Lo: 9°C |
Tuesday... Mostly clear. Highs around 70. Lows in the upper 40s. |
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