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Jacksonville, IL Weather Forecast
Jacksonville, IL Weather Forecast Date: 409 PM CDT Thu Sep 17 2026
The area/counties/county of: Morgan, including the city of Jacksonville.or toggle through each period.
Tonight... Mostly clear with a slight chance of showers and thunderstorms this evening, then partly cloudy with a chance of showers and thunderstorms after midnight. Lows around 70. Northwest winds around 5 mph, becoming northeast around 5 mph after midnight. Chance of rain 30%.
Friday... Mostly sunny with a slight chance of showers and thunderstorms. Humid with highs around 90. East winds around 5 mph. Chance of rain 20%.
Friday Night... Partly cloudy in the evening, then mostly clear with a slight chance of showers after midnight. Humid with lows around 70. Southeast winds 5 to 10 mph. Chance of rain 20%.
Saturday... Partly sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph.
Saturday Night... Mostly cloudy. A chance of showers after midnight. Lows around 70. South winds around 5 mph, becoming southwest after midnight. Chance of rain 40%.
Sunday... Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50%.
Sunday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 60s. Chance of rain 60%.
Monday... Showers likely, mainly in the morning. Cooler with highs in the mid 70s. Chance of rain 60%.
Monday Night... Mostly cloudy. Lows in the mid 50s. Highs in the upper 60s.
Tuesday... Mostly cloudy. Lows in the mid 50s. Highs in the upper 60s.
Wednesday... Partly cloudy. Highs in the mid 70s. Lows in the mid 50s.
POP = Probability of Precipitation
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