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Principia College, MO Weather Forecast
Principia College, MO Weather Forecast Date: 938 PM CDT Tue Aug 25 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... Mostly cloudy. Lows in the upper 60s. Southeast winds around 5 mph.
Wednesday... Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Southwest winds 5 to 10 mph. Chance of rain 20%.
Wednesday Night... Mostly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 60s. Northwest winds around 5 mph. Chance of rain 40%.
Thursday... Sunny. Highs in the mid 80s. North winds 5 to 10 mph.
Thursday Night... Mostly clear. Lows in the mid 60s. North winds around 5 mph.
Friday... Sunny. Highs in the mid 80s.
Friday Night... Mostly clear. Lows in the lower 60s. Highs in the upper 80s.
Saturday... Mostly clear. Lows in the lower 60s. Highs in the upper 80s.
Saturday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 60s.
Sunday... Mostly sunny. Highs in the lower 90s.
Sunday Night... Mostly clear. Lows in the lower 70s.
Monday... Mostly sunny. Highs in the mid 90s. Heat index values up to 100 in the afternoon.
Monday Night... Partly cloudy. A 20% chance of showers. Lows in the mid 70s. Highs in the lower 90s. Heat index values up to 100.
POP = Probability of Precipitation
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