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Lake Jacksonville, IL Weather Forecast
Lake Jacksonville, IL Weather Forecast Date: 927 AM CDT Sun Aug 30 2026
The area/counties/county of: Morgan, including the city of Jacksonville.or toggle through each period.
Rest of Today... Mostly sunny. Highs in the lower 90s. South winds around 10 mph with gusts up to 20 mph.
Tonight... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. South winds around 10 mph with gusts up to 20 mph.
Monday... Mostly sunny. Hot with highs in the mid 90s. South winds around 10 mph with gusts up to 20 mph.
Monday Night... Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph.
Tuesday... Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 103.
Tuesday Night... Clear. Lows in the upper 70s.
Wednesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s.
Thursday... Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s.
Thursday Night... Partly cloudy. Lows in the lower 70s. Highs in the mid 90s.
Friday... Partly cloudy. Lows in the lower 70s. Highs in the mid 90s.
POP = Probability of Precipitation
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