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Posey, IL 7-Day Night Weather Forecast
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Posey, IL Weather Forecast
Posey, IL Weather Forecast Date: 348 PM CDT Sat Sep 05 2026
The area/counties/county of: Clinton County Il, including the cities of: Centralia and Salem.or toggle through each period.
Tonight... Partly cloudy with a slight chance of showers and thunderstorms this evening, then mostly clear after midnight. Lows around 70. Northeast winds around 5 mph. Chance of rain 20%. Heat index values up to 105 early this evening.
Sunday... Sunny. Not as warm with highs around 90. Northeast winds 5 to 10 mph.
Sunday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph.
Labor Day... Sunny. Highs in the upper 80s. East winds around 5 mph.
Monday Night... Mostly clear. Lows in the mid 60s. East winds around 5 mph.
Tuesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the lower 70s. Heat index values up to 105.
Wednesday... Mostly clear. Hot. Highs in the upper 90s. Lows in the lower 70s. Heat index values up to 105.
Wednesday Night... Mostly clear in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the lower 70s. Chance of rain 30%. Heat index values up to 100 early in the evening.
Thursday... Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Not as warm with highs in the upper 80s. Chance of rain 50%.
Thursday Night... Partly cloudy with a slight chance of showers. A slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 20%.
Friday... Partly cloudy. A 20% chance of showers. Highs in the upper 80s. Lows in the mid 60s.
Friday Night... Partly cloudy. A 20% chance of showers. Highs in the upper 80s. Lows in the mid 60s.
POP = Probability of Precipitation
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