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City of Chester, ILChester, IL 7-Day Night Weather Forecast
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Chester, IL Weather Forecast
Chester, IL Weather Forecast Date: 202 AM CDT Sat Sep 12 2026
The area/counties/county of: Randolph County Il, including the cities of: Chester and Sparta.or toggle through each period.
Rest of Tonight... Partly cloudy. Patchy fog. Near steady temperature in the upper 60s. Southwest winds around 5 mph.
Saturday... Patchy fog in the morning. Sunny. Highs around 90. West winds around 5 mph.
Saturday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. Light and variable winds.
Sunday... Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. West winds around 5 mph. Chance of rain 20%. Heat index values up to 100 in the afternoon.
Sunday Night... Mostly cloudy with a slight chance of thunderstorms. A chance of showers, mainly in the evening. Lows in the lower 60s. Northeast winds around 5 mph. Chance of rain 30%.
Monday... Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20%.
Monday Night... Mostly clear. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 105.
Tuesday... Mostly clear. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 105.
Wednesday... Mostly clear. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 105.
Thursday... Partly cloudy. A chance of showers with a slight chance of thunderstorms. Highs around 90. Lows in the mid 60s. Chance of rain 40%.
Thursday Night... Partly cloudy. A chance of showers with a slight chance of thunderstorms. Highs around 90. Lows in the mid 60s. Chance of rain 40%.
POP = Probability of Precipitation
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