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East St. Louis, IL Weather Forecast
East St. Louis, IL Weather Forecast Date: 548 PM CDT Sun Aug 16 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.
Tonight... Mostly cloudy. Showers and thunderstorms likely, mainly this evening. Lows in the lower 70s. North winds around 5 mph. Gusts up to 20 mph this evening. Chance of rain 70%. Heat index values up to 106 early this evening.
Monday... Partly sunny. Highs in the mid 80s. North winds 5 to 10 mph.
Monday Night... Partly cloudy. Lows in the mid 60s. North winds 5 to 10 mph.
Tuesday... Sunny. Highs in the upper 80s. Southwest winds around 5 mph.
Tuesday Night... Mostly clear in the evening, then partly cloudy with a chance of showers after midnight. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 50%.
Wednesday... Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 80s. Chance of rain 50%.
Wednesday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 60%.
Thursday... Mostly cloudy in the morning, then becoming partly sunny. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the lower 80s. Chance of rain 50%.
Thursday Night... Partly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 20%.
Friday... Partly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 20%.
Friday Night... Mostly clear. Lows in the mid 60s. Highs in the mid 80s.
Saturday... Mostly clear. Lows in the mid 60s. Highs in the mid 80s.
POP = Probability of Precipitation
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