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Lee, IL 7-Day Night Weather Forecast
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Lee, IL Weather Forecast
Lee, IL Weather Forecast Date: 256 AM CDT Thu Sep 03 2026
The area/counties/county of: De Kalb, including the cities of: Dekalb and Sycamore.or toggle through each period.
Early This Morning... Partly cloudy late, then becoming mostly cloudy. A slight chance of showers and thunderstorms. Temperatures in the mid 70s. Southwest winds around 5 mph. Chance of precipitation 20%.
Today... Partly cloudy. A slight chance of showers and thunderstorms early in the afternoon. A chance of showers and thunderstorms late. Hot, humid. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of precipitation 40%. Heat index values up to 104.
Tonight... Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms until early morning, then a chance of showers and thunderstorms late. Humid with lows in the lower 70s. Southeast winds 5 to 10 mph. Chance of precipitation 40%.
Friday... Partly cloudy in the morning, then clearing. A slight chance of showers and thunderstorms early in the morning. Humid with highs around 90. South winds 5 to 10 mph, becoming southwest in the afternoon. Chance of precipitation 20%. Heat index values up to 100.
Friday Night... Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. South winds around 5 mph, becoming east after midnight. Chance of precipitation 50%.
Saturday... Partly cloudy. A slight chance of showers and thunderstorms in the morning. Humid with highs in the mid 80s. Northeast winds 5 to 10 mph. Chance of precipitation 20%.
Saturday Night... Partly cloudy. Lows in the mid 60s.
Sunday... Partly cloudy. Highs in the upper 70s.
Sunday Night... Partly cloudy. Lows in the lower 60s.
Labor Day... Partly cloudy. Highs in the lower 80s.
Monday Night... Partly cloudy. Lows in the mid 60s.
Tuesday... Partly cloudy. Highs in the mid 80s.
Tuesday Night... Partly cloudy. A chance of showers after midnight. Lows around 70. Chance of precipitation 30%.
POP = Probability of Precipitation
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