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Madison, IL 7-Day Night Weather Forecast
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Madison, IL Weather Forecast
Madison, IL Weather Forecast Date: 1227 AM CDT Sat Sep 05 2026
The area/counties/county of: Madison County Il, including the cities of: Alton, Edwardsville, Belleville, Cahokia, Saint Charles, and Saint Louis.or toggle through each period.
Rest of Tonight... Mostly clear. Lows in the mid 70s. Southwest winds around 5 mph.
Saturday... Mostly sunny. Isolated showers and thunderstorms in the afternoon. Hot with highs around 100. Northwest winds around 5 mph. Chance of rain 20%. Heat index values up to 110.
Saturday Night... Partly cloudy with isolated showers in the evening, then mostly clear after midnight. Humid with lows in the lower 70s. Northeast winds around 5 mph. Chance of rain 20%. Heat index values up to 106 early in the evening.
Sunday... Mostly sunny. Highs in the lower 90s. Northeast winds 5 to 10 mph.
Sunday Night... Mostly clear. Lows in the mid 60s. East winds 5 to 10 mph.
Labor Day... Mostly clear. Highs in the upper 80s. Lows in the mid 60s.
Monday Night... Mostly clear. Highs in the upper 80s. Lows in the mid 60s.
Tuesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 105.
Wednesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 105.
Wednesday Night... Mostly clear with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20%. Heat index values up to 105 early in the evening.
Thursday... Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the upper 60s. Chance of rain 20%.
POP = Probability of Precipitation
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