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Chain Lake, IL Weather Forecast
Chain Lake, IL Weather Forecast Date: 427 PM CDT Thu Oct 29 2026
The area/counties/county of: Mason, including the city of Havana.or toggle through each period.
Tonight... Mostly clear this evening, then becoming partly cloudy. Cooler with lows in the upper 40s. Northeast winds around 5 mph.
Friday... Partly sunny in the morning, then becoming mostly cloudy. A 50% chance of showers. Cooler with highs in the upper 60s. East winds 5 to 10 mph.
Friday Night... Mostly cloudy with a 20% chance of showers. Lows in the lower 50s. East winds 5 to 10 mph.
Saturday... Cloudy. A chance of showers in the morning. Highs around 70. East winds around 5 mph. Chance of rain 40%.
Saturday Night... Cloudy. Lows in the lower 50s. East winds around 5 mph.
Sunday... Mostly cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Highs in the lower 70s. Chance of rain 30%.
Sunday Night... Mostly cloudy. Lows in the mid 50s.
Monday... Mostly cloudy with a 50% chance of showers. Highs in the lower 70s.
Monday Night... Showers likely. Lows in the upper 50s. Chance of rain 60%.
Tuesday... Showers likely. Highs in the mid 70s. Chance of rain 70%.
Tuesday Night... Showers likely. Lows in the mid 50s. Highs around 70. Chance of rain 70%.
Wednesday... Showers likely. Lows in the mid 50s. Highs around 70. Chance of rain 70%.
Wednesday Night... Mostly cloudy. A chance of showers in the evening. Lows in the upper 40s. Chance of rain 50%.
POP = Probability of Precipitation
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