Weather WorldHarmony School, IL 7-Day Night Weather Forecast
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Harmony School, IL Weather Forecast
Harmony School, IL Weather Forecast Date: 127 PM CDT Thu Sep 10 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... Mostly cloudy with a slight chance of showers and thunderstorms. Much cooler. Near steady temperature in the upper 70s. North winds around 5 mph. Chance of rain 20%.
Tonight... Mostly cloudy. Patchy fog after midnight. Lows in the upper 60s. North winds around 5 mph in the evening, becoming light and variable.
Friday... Patchy fog in the morning. Mostly cloudy with a 20% chance of showers. Highs in the lower 80s. Southeast winds around 5 mph.
Friday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 60s. South winds around 5 mph.
Saturday... Mostly sunny. Humid with highs around 90. Southwest winds around 5 mph.
Saturday Night... Partly cloudy. Lows in the upper 60s.
Sunday... Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20%.
Sunday Night... Partly cloudy. Lows in the upper 60s.
Monday... Mostly clear. Highs in the lower 90s. Lows around 70.
Monday Night... Mostly clear. Highs in the lower 90s. Lows around 70.
Tuesday... Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30%. Heat index values up to 100 in the afternoon.
Tuesday Night... A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 40%.
POP = Probability of Precipitation
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