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City of Alton, IllinoisAlton, IL 7-Day Night Weather Forecast
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Alton, IL Weather Forecast
Alton, IL Weather Forecast Date: 228 PM CST Sat Nov 07 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.
This Afternoon... Partly sunny. Near steady temperature in the lower 50s. West winds around 5 mph.
Tonight... Partly cloudy in the evening, then becoming mostly clear. Areas of fog after midnight. Lows in the lower 30s. Light and variable winds, becoming southwest around 5 mph after midnight.
Sunday... Sunny. Highs in the lower 60s. West winds 5 to 10 mph.
Sunday Night... Mostly clear. Lows in the upper 30s. West winds around 5 mph in the evening, becoming light and variable.
Monday... Sunny. Highs in the mid 60s. Southwest winds around 5 mph.
Monday Night... Clear. Lows in the mid 40s. Highs in the upper 60s.
Tuesday... Clear. Lows in the mid 40s. Highs in the upper 60s.
Tuesday Night... Mostly clear. Lows in the mid 40s.
Veterans Day... Partly sunny. A slight chance of rain in the morning, then a chance of rain in the afternoon. Highs in the mid 60s. Chance of rain 30%.
Wednesday Night... Mostly cloudy with a slight chance of rain in the evening, then partly cloudy after midnight. Lows in the lower 40s. Chance of rain 20%.
Thursday... Mostly sunny. A slight chance of rain in the morning. Cooler with highs in the mid 50s. Chance of rain 20%.
Thursday Night... Partly cloudy. Lows in the lower 30s. Highs in the lower 50s.
POP = Probability of Precipitation
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