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Jack Lake, IL 7-Day Night Weather Forecast
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Jack Lake, IL Weather Forecast
Jack Lake, IL Weather Forecast Date: 1227 AM CST Sat Nov 07 2026
The area/counties/county of: Mason, including the city of Havana.or toggle through each period.
Rest of Tonight... Mostly clear. Cooler with lows in the upper 20s. West winds around 5 mph.
Saturday... Mostly sunny. Highs in the lower 50s. West winds around 5 mph.
Saturday Night... Mostly clear. Lows in the lower 30s. Southwest winds around 5 mph.
Sunday... Sunny. Not as cool with highs in the lower 60s. West winds 5 to 10 mph.
Sunday Night... Mostly clear. Lows in the mid 30s. West winds around 5 mph in the evening, becoming light and variable.
Monday... Sunny. Highs in the mid 60s.
Monday Night... Clear. Lows in the mid 40s. Highs in the mid 60s.
Tuesday... Clear. Lows in the mid 40s. Highs in the mid 60s.
Tuesday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s.
Veterans Day... Partly cloudy. Highs in the lower 60s. Lows in the upper 30s.
Wednesday Night... Partly cloudy. Highs in the lower 60s. Lows in the upper 30s.
Thursday... Partly cloudy. Highs in the lower 50s. Lows in the lower 30s.
POP = Probability of Precipitation
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