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St. Jacob, IL Weather Forecast
St. Jacob, IL Weather Forecast Date: 454 PM CST Tue Nov 03 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... Rain with a slight chance of thunderstorms this evening, then a chance of rain after midnight. Cooler with lows in the lower 50s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain near 100%.
Wednesday... Mostly cloudy. Cooler with highs in the lower 60s. West winds 10 to 15 mph.
Wednesday Night... Mostly cloudy in the evening, then clearing. Cooler with lows in the lower 40s. Southwest winds around 5 mph.
Thursday... Sunny. Highs in the mid 60s. West winds 5 to 10 mph.
Thursday Night... Mostly cloudy. Lows in the mid 40s. Northwest winds around 5 mph.
Friday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 50s.
Friday Night... Partly cloudy. Lows in the upper 30s.
Saturday... Partly sunny. Highs in the mid 50s.
Saturday Night... Partly cloudy. Lows in the mid 30s.
Sunday... Mostly clear. Highs in the mid 60s. Lows in the mid 30s.
Monday... Mostly clear. Highs in the mid 60s. Lows in the mid 30s.
Monday Night... Mostly clear. Lows in the lower 40s. Highs in the upper 60s.
POP = Probability of Precipitation
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