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Tri-County, IL 7-Day Night Weather Forecast
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Tri-County, IL Weather Forecast
Tri-County, IL Weather Forecast Date: 127 AM CDT Thu Sep 10 2026
The area/counties/county of: Knox, including the city of Galesburg.or toggle through each period.
Rest of Tonight... Cloudy. Patchy fog. Near steady temperature in the mid 60s. Light and variable winds.
Thursday... Mostly cloudy in the morning, then becoming partly sunny. Patchy fog in the morning. Highs in the upper 70s. Northeast winds around 5 mph.
Thursday Night... Mostly clear. Lows in the upper 50s. Northeast winds around 5 mph.
Friday... Sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph.
Friday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. Southeast winds around 5 mph.
Saturday... Partly cloudy. Highs in the lower 80s. Lows in the lower 60s.
Saturday Night... Partly cloudy. Highs in the lower 80s. Lows in the lower 60s.
Sunday... Mostly cloudy. Highs in the lower 80s. Lows in the mid 60s.
Sunday Night... Mostly cloudy. Highs in the lower 80s. Lows in the mid 60s.
Monday... Mostly sunny. A chance of showers in the afternoon. Highs in the upper 80s. Chance of rain 40%.
Monday Night... Mostly clear with a chance of showers and thunderstorms in the evening, then partly cloudy with showers likely after midnight. Lows in the mid 60s. Chance of rain 60%.
Tuesday... Partly sunny with a 50% chance of showers. Cooler with highs in the mid 70s.
Tuesday Night... Mostly cloudy. A 40% chance of showers. Lows in the upper 50s. Highs in the mid 70s.
POP = Probability of Precipitation
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