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Sinclair, IL 7-Day Night Weather Forecast
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Sinclair, IL Weather Forecast
Sinclair, IL Weather Forecast Date: 737 PM CDT Thu Sep 03 2026
The area/counties/county of: Morgan, including the city of Jacksonville.or toggle through each period.
Tonight... Clear. Lows in the mid 70s. South winds around 5 mph.
Friday... Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 105.
Friday Night... Mostly clear in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Southwest winds around 5 mph in the evening, becoming light and variable. Chance of rain 20%.
Saturday... Sunny, hot with highs in the mid 90s. West winds around 5 mph, becoming northwest around 5 mph in the afternoon. Heat index values up to 105.
Saturday Night... Mostly clear. Humid with lows in the upper 60s. Northeast winds around 5 mph.
Sunday... Mostly clear. Highs around 90. Lows in the mid 60s.
Monday... Mostly clear. Highs around 90. Lows in the mid 60s.
Tuesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s.
Wednesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s.
POP = Probability of Precipitation
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