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Chapman, IL 7-Day Night Weather Forecast
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Chapman, IL Weather Forecast
Chapman, IL Weather Forecast Date: 242 PM CDT Thu Sep 03 2026
The area/counties/county of: Montgomery County Il, including the cities of: Litchfield and Vandalia.or toggle through each period.
Tonight... Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 103 early this evening.
Friday... Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 105.
Friday Night... Mostly clear. A slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Southwest winds around 5 mph in the evening, becoming light and variable. Chance of rain 20%. Heat index values up to 103 early in the evening.
Saturday... Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. West winds around 5 mph. Chance of rain 20%. Heat index values up to 105.
Saturday Night... Mostly clear. Lows around 70. Northeast winds around 5 mph. Heat index values up to 100 early in the evening.
Sunday... Mostly clear. Highs in the lower 90s. Lows in the mid 60s.
Monday... Mostly clear. Highs in the lower 90s. Lows in the mid 60s.
Tuesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 100.
Wednesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 100.
Wednesday Night... Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20%.
POP = Probability of Precipitation
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