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St. Jacob, IL 7-Day Night Weather Forecast
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St. Jacob, IL Weather Forecast
St. Jacob, IL Weather Forecast Date: 1028 PM CST Tue Mar 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.
Overnight... Cloudy with a chance of thunderstorms. A chance of showers late this evening, then showers likely. Patchy fog. Not as cool. Near steady temperature around 50. Northeast winds 5 to 10 mph. Chance of rain 70%.
Wednesday... A chance of showers and thunderstorms in the morning, then showers with a slight chance of thunderstorms in the afternoon. Patchy fog. Not as cool with highs in the mid 60s. East winds around 5 mph, becoming south in the afternoon. Chance of rain near 100%.
Wednesday Night... Showers with thunderstorms likely in the evening, then showers with a chance of thunderstorms after midnight. Patchy fog after midnight. Lows in the mid 50s. East winds around 5 mph, becoming south after midnight. Chance of rain near 100%.
Thursday... Cloudy with showers likely in the morning, then partly sunny with a chance of showers in the afternoon. Highs in the upper 60s. West winds 5 to 10 mph. Chance of rain 70%.
Thursday Night... Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Lows in the upper 50s. South winds 5 to 10 mph. Chance of rain 70%.
Friday... Partly sunny. A chance of showers with a slight chance of thunderstorms in the morning, then a slight chance of showers in the afternoon. Not as cool with highs in the upper 70s. Chance of rain 50%.
Friday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers after midnight. Lows in the upper 50s. Chance of rain 90%.
Saturday... Mostly cloudy with a chance of showers in the morning, then partly sunny with a slight chance of showers in the afternoon. Cooler with highs in the upper 60s. Chance of rain 50%.
Saturday Night... Partly cloudy. Much cooler with lows in the lower 40s.
Sunday... Mostly clear. Highs in the upper 60s. Lows in the upper 40s.
Sunday Night... Mostly clear. Highs in the upper 60s. Lows in the upper 40s.
Monday... Sunny. A slight chance of showers in the afternoon. Highs in the mid 70s. Chance of rain 20%.
Monday Night... Mostly clear. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Not as cool with lows in the upper 50s. Chance of rain 30%.
POP = Probability of Precipitation
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