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Colchester, IL Weather Forecast
Colchester, IL Weather Forecast Date: 801 PM CDT Sun Sep 27 2026
The area/counties/county of: Mcdonough, including the city of Macomb.or toggle through each period.
Tonight... Mostly cloudy this evening, then becoming partly cloudy. Lows in the lower 50s. North winds around 5 mph this evening, becoming light and variable.
Monday... Sunny. Highs in the lower 70s. Light and variable winds.
Monday Night... Mostly clear. Lows in the mid 50s. Light and variable winds.
Tuesday... Mostly sunny. Highs in the upper 70s. Southeast winds 5 to 10 mph.
Tuesday Night... Mostly cloudy. Not as cool with lows in the mid 60s. Southeast winds around 5 mph.
Wednesday... Mostly cloudy. Highs in the upper 70s.
Wednesday Night... Mostly cloudy. A chance of showers after midnight. Lows in the upper 60s. Chance of rain 50%.
Thursday... Showers. Highs in the mid 70s. Chance of rain 80%.
Thursday Night... Mostly cloudy with a chance of showers. Cooler with lows in the upper 50s. Chance of rain 50%.
Friday... Mostly sunny. Highs in the mid 60s.
Friday Night... Mostly clear. Lows in the lower 50s.
Saturday... Partly cloudy. Highs in the upper 60s. Lows in the lower 50s.
POP = Probability of Precipitation
Colchester Radar Loop
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