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Cahokia, IL Weather Forecast
Cahokia, IL Weather Forecast Date: 338 AM CDT Mon Sep 21 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.
Today... Patchy fog this morning. Cloudy with a slight chance of thunderstorms. A chance of showers, mainly this morning. Much cooler with highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of rain 40%.
Tonight... Mostly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph.
Tuesday... Partly sunny. Highs in the lower 70s. Northeast winds 5 to 10 mph.
Tuesday Night... Partly cloudy. Lows in the mid 50s. Northeast winds 5 to 10 mph.
Wednesday... Mostly sunny. Highs in the mid 70s. North winds 5 to 10 mph.
Wednesday Night... Partly cloudy. Lows in the mid 50s. Highs in the mid 70s.
Thursday... Partly cloudy. Lows in the mid 50s. Highs in the mid 70s.
Friday... Partly cloudy. Lows in the mid 50s. Highs in the mid 70s.
Saturday... Partly sunny. A slight chance of showers in the morning. Highs in the mid 70s. Chance of rain 20%.
Saturday Night... Mostly cloudy. Lows in the upper 50s.
POP = Probability of Precipitation
Cahokia Radar Loop
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