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St. Clair Park, IL Weather Forecast
St. Clair Park, IL Weather Forecast Date: 1042 PM CDT Thu Oct 01 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.
Overnight... Showers, cooler with lows in the lower 60s. Northwest winds around 5 mph, increasing to north 10 to 15 mph. Chance of rain 90%.
Friday... Cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Much cooler with highs in the upper 60s. North winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50%.
Friday Night... Partly cloudy in the evening, then clearing. Cooler with lows around 50. Northeast winds 5 to 10 mph.
Saturday... Sunny. Highs in the mid 70s. East winds around 5 mph.
Saturday Night... Partly cloudy. Lows in the lower 50s. East winds around 5 mph in the evening, becoming light and variable.
Sunday... Sunny. Highs in the mid 70s.
Sunday Night... Clear. Lows in the lower 50s. Highs in the lower 70s.
Monday... Clear. Lows in the lower 50s. Highs in the lower 70s.
Monday Night... Clear. Lows in the mid 40s. Highs in the lower 70s.
Tuesday... Clear. Lows in the mid 40s. Highs in the lower 70s.
Tuesday Night... Mostly clear. Lows in the upper 40s.
Wednesday... Mostly sunny. Highs in the upper 70s.
Wednesday Night... Mostly clear. Lows in the lower 50s. Highs around 80.
POP = Probability of Precipitation
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