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Sumner, IL Weather Forecast
Sumner, IL Weather Forecast Date: 737 PM CDT Mon Sep 07 2026
The area/counties/county of: Lawrence, including the city of Lawrenceville.or toggle through each period.
Tonight... Mostly clear. Lows in the lower 60s. Northeast winds around 5 mph.
Tuesday... Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph.
Tuesday Night... Partly cloudy. Lows in the lower 70s. South winds 5 to 10 mph.
Wednesday... Sunny, hot with highs in the upper 90s. Southwest winds 10 to 15 mph. Heat index values up to 104.
Wednesday Night... A chance of thunderstorms. Showers with lows around 70. Southwest winds 5 to 10 mph. Chance of rain 90%.
Thursday... A chance of thunderstorms. Showers, mainly in the morning. Not as warm with highs in the lower 80s. Chance of rain 90%.
Thursday Night... Partly cloudy. Lows in the mid 60s. Highs in the mid 80s.
Friday... Partly cloudy. Lows in the mid 60s. Highs in the mid 80s.
Saturday... Mostly sunny. A chance of showers in the morning. Highs in the lower 90s. Chance of rain 30%.
Saturday Night... Mostly clear. Lows in the mid 60s. Highs in the lower 90s.
Sunday... Mostly clear. Lows in the mid 60s. Highs in the lower 90s.
POP = Probability of Precipitation
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