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Dupo, IL Weather Forecast
Dupo, IL Weather Forecast Date: 338 AM CDT Fri Oct 02 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... Cloudy with a chance of showers this morning, then partly sunny this afternoon. Much cooler with highs in the lower 70s. North winds 10 to 15 mph. Chance of rain 50%.
Tonight... 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 around 50. East winds around 5 mph in the evening, becoming light and variable.
Sunday... Sunny. Highs in the upper 70s. North winds 5 to 10 mph.
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 mid 70s.
Tuesday... Clear. Lows in the mid 40s. Highs in the mid 70s.
Tuesday Night... Mostly clear. Lows in the upper 40s. Highs around 80.
Wednesday... Mostly clear. Lows in the upper 40s. Highs around 80.
Wednesday Night... Mostly clear. Lows in the mid 50s.
POP = Probability of Precipitation
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