Weather WorldRound Lake, IL 7-Day Weather Forecast
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Round Lake Weather Forecast
Round Lake, IL Weather Forecast Date: 946 PM CDT Mon Oct 26 2026
Weather forecast for Round Lake, IL
Tonight Lo: 49°F Lo: 9°C |
Tonight... Mostly cloudy. Lows in the upper 40s. East winds 5 to 10 mph. |
Tue Hi: 69°FHi: 21°C Lo: 51°F Lo: 11°C |
Tuesday... Mostly cloudy. Highs in the upper 60s. Southeast winds 5 to 10 mph. |
Wed Hi: 71°FHi: 22°C Lo: 55°F Lo: 13°C |
Wednesday... Mostly cloudy in the morning, then clearing. Highs in the lower 70s. South winds 5 to 10 mph. |
Thu Hi: 71°FHi: 22°C Lo: 50°F Lo: 10°C |
Thursday... Mostly cloudy. A chance of showers, mainly in the morning. Highs in the lower 70s. Chance of precipitation 30%. |
| Fri Hi: 69°FHi: 21°C Lo: 51°F Lo: 11°C |
Friday... Mostly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the upper 60s inland, but only in the mid 60s near the lake. Chance of precipitation 40%. |
| Sat Hi: 70°FHi: 21°C Lo: 55°F Lo: 13°C |
Saturday... Mostly cloudy. A chance of showers in the morning. Highs around 70 inland, but only in the mid 60s near the lake. Chance of precipitation 30%. |
| Sun Hi: 70°FHi: 21°C Lo: 51°F Lo: 11°C |
Sunday... Mostly cloudy. A chance of showers in the morning. Highs around 70. Chance of precipitation 40%. |
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