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Lake Jacksonville, IL 7-Day Night Weather Forecast
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Lake Jacksonville, IL Weather Forecast
Lake Jacksonville, IL Weather Forecast Date: 431 AM CDT Sat Sep 19 2026
The area/counties/county of: Morgan, including the city of Jacksonville.or toggle through each period.
Today... Mostly sunny early in the morning then becoming mostly cloudy. Highs in the lower 90s. Southwest winds 5 to 10 mph.
Tonight... Mostly cloudy in the evening, then partly cloudy with a 20% chance of thunderstorms after midnight. Lows in the upper 60s. South winds up to 5 mph shifting to the southwest after midnight.
Sunday... Not as warm. Mostly cloudy with a 50% chance of thunderstorms. Highs in the lower 80s. North winds up to 10 mph.
Sunday Night... Mostly cloudy. Chance of thunderstorms in the evening, then showers likely and chance of thunderstorms after midnight. Lows in the lower 60s. Northeast winds 5 to 15 mph. Chance of precipitation 70%.
Monday... Cooler. Showers likely in the morning, then chance of showers in the afternoon. Highs around 70. Northeast winds 10 to 15 mph. Chance of showers 70%.
Monday Night... Mostly cloudy. Lows in the mid 50s. Highs in the mid 60s.
Tuesday... Mostly cloudy. Lows in the mid 50s. Highs in the mid 60s.
Tuesday Night... Mostly cloudy in the evening then becoming partly cloudy. Lows around 50.
Wednesday... Partly cloudy. Highs 70 to 75. Lows in the mid 50s.
Thursday... Partly cloudy. Highs 70 to 75. Lows in the mid 50s.
POP = Probability of Precipitation
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