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Site 21 Park, IL 7-Day Night Weather Forecast
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Site 21 Park, IL Weather Forecast
Site 21 Park, IL Weather Forecast Date: 246 PM CDT Tue Aug 04 2026
The area/counties/county of: Lake County Il, including the cities of: Waukegan, Buffalo Grove, Mundelein, and Gurnee.or toggle through each period.
Late This Afternoon... Partly cloudy. Temperatures in the lower 80s. Southwest winds around 10 mph.
Tonight... Mostly cloudy. A slight chance of showers and thunderstorms late in the evening. A chance of showers and thunderstorms after midnight. Lows in the upper 60s. Southwest winds 5 to 10 mph. Chance of precipitation 50%.
Wednesday... Showers and thunderstorms in the morning, then a chance of showers and thunderstorms early in the afternoon. Showers and thunderstorms likely late. Highs in the mid 70s. Southwest winds around 5 mph. Chance of precipitation 80%.
Wednesday Night... Mostly cloudy. Showers and thunderstorms likely, mainly in the evening. Lows in the lower 60s. North winds around 5 mph. Chance of precipitation 70%.
Thursday... Mostly cloudy in the morning, then becoming partly cloudy. A slight chance of showers and thunderstorms in the morning. Highs in the mid 70s. Northeast winds around 5 mph. Chance of precipitation 20%.
Thursday Night... Partly cloudy. Lows in the lower 60s. East winds around 5 mph in the evening, becoming light and variable.
Friday... Partly cloudy. Highs around 80.
Friday Night... Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the mid 60s. Chance of precipitation 20%.
Saturday... Partly cloudy. Highs in the lower 80s.
Saturday Night... Mostly clear in the evening, then becoming partly cloudy. A chance of thunderstorms in the evening. A chance of showers. Lows in the mid 60s. Chance of precipitation 40%.
Sunday... Mostly cloudy. A chance of showers in the afternoon. Highs in the lower 80s. Chance of precipitation 40%.
Sunday Night... Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of precipitation 50%.
Monday... Mostly cloudy. Showers likely in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 60%.
Monday Night... Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Chance of precipitation 50%.
POP = Probability of Precipitation
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