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Rio, IL 7-Day Night Weather Forecast
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Rio, IL Weather Forecast
Rio, IL Weather Forecast Date: 737 PM CDT Thu Sep 03 2026
The area/counties/county of: Knox, including the city of Galesburg.or toggle through each period.
Tonight... Clear. Lows in the mid 70s. South winds around 5 mph.
Friday... Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107.
Friday Night... Mostly clear. A slight chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. Southwest winds around 5 mph in the evening, becoming light and variable. Chance of rain 20%.
Saturday... Sunny with highs in the lower 90s. Northwest winds around 5 mph. Heat index values up to 104.
Saturday Night... Mostly clear. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph.
Sunday... Mostly sunny. Highs in the mid 80s.
Sunday Night... Mostly clear. Lows in the lower 60s.
Labor Day... Partly cloudy. Highs in the mid 80s. Lows in the mid 60s.
Monday Night... Partly cloudy. Highs in the mid 80s. Lows in the mid 60s.
Tuesday... Mostly sunny. Highs in the lower 90s.
Tuesday Night... Mostly clear. Lows in the lower 70s.
Wednesday... Mostly sunny. Highs in the lower 90s.
Wednesday Night... Partly cloudy. A chance of showers after midnight. Lows around 70. Chance of rain 30%.
POP = Probability of Precipitation
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