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Round Lake, IL Weather Forecast
Round Lake, IL Weather Forecast Date: 336 AM CDT Wed Oct 28 2026
The area/counties/county of: Lake County Il, including the cities of: Waukegan, Buffalo Grove, Mundelein, and Gurnee.or toggle through each period.
Early This Morning... Partly cloudy late then clearing. Temperatures in the lower 50s. Southwest winds around 5 mph.
Today... Mostly sunny. Highs in the lower 70s. Southwest winds 5 to 10 mph, increasing to south 10 to 15 mph in the afternoon.
Tonight... Mostly clear in the evening, then becoming mostly cloudy. A slight chance of showers after midnight. A chance of showers with a slight chance of thunderstorms late. Lows in the upper 50s. South winds 10 to 15 mph. Chance of precipitation 30%.
Thursday... Mostly cloudy in the morning, then clearing. A slight chance of showers early in the morning. Highs in the upper 60s. West winds around 10 mph, becoming northwest in the afternoon. Chance of precipitation 20%.
Thursday Night... Mostly clear. Cooler with lows in the lower 40s. North winds around 5 mph.
Friday... Mostly cloudy. Highs in the lower 60s. East winds around 5 mph.
Friday Night... Cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 40s. Chance of precipitation 30%.
Saturday... Cloudy with a 40% chance of showers. Highs in the lower 60s.
Saturday Night... Cloudy. A chance of showers after midnight. Lows in the upper 40s. Chance of precipitation 30%.
Sunday... Mostly cloudy with a 40% chance of showers. Highs in the mid 60s.
Sunday Night... Mostly cloudy. A chance of showers in the evening. Lows in the lower 50s. Chance of precipitation 40%.
Monday... Mostly cloudy with a 40% chance of showers. Highs in the mid 60s.
Monday Night... Mostly cloudy with a 50% chance of showers. Lows in the lower 50s.
POP = Probability of Precipitation
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