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Posen, IL 7-Day Night Weather Forecast
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Posen, IL Weather Forecast
Posen, IL Weather Forecast Date: 556 AM CDT Tue Oct 13 2026
The area/counties/county of: Southern Cook, including the cities of: Calumet City, Oak Forest, Lemont, Orland Park, and Park Forest.or toggle through each period.
Today... Mostly sunny. Highs in the lower 80s. West winds 10 to 15 mph, diminishing to 5 to 10 mph in the afternoon.
Tonight... A chance of showers and thunderstorms early in the evening, then showers and thunderstorms likely in the late evening and early morning. A chance of showers and thunderstorms late. Lows in the lower 60s. North winds around 5 mph. Chance of precipitation 70%.
Wednesday... Mostly cloudy. A chance of showers early in the morning, then a slight chance of showers late in the morning. Not as warm with highs in the mid 60s. North winds 5 to 10 mph, increasing to northeast 10 to 15 mph in the afternoon. Chance of precipitation 30%.
Wednesday Night... Mostly cloudy. A chance of rain after midnight. Near steady temperature in the upper 50s. Northeast winds around 10 mph. Chance of precipitation 30%.
Thursday... Rain. A chance of thunderstorms in the afternoon. Highs in the lower 60s. East winds 5 to 10 mph. Chance of precipitation 90%.
Thursday Night... Mostly cloudy. Rain likely in the evening. Breezy with lows in the upper 40s. Chance of precipitation 60%.
Friday... Partly cloudy and breezy. Highs in the mid 50s.
Friday Night... Mostly clear. Lows in the upper 30s.
Saturday... Sunny. Highs in the upper 50s.
Saturday Night... Clear. Lows in the upper 30s.
Sunday... Sunny. Highs in the mid 60s.
Sunday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s.
POP = Probability of Precipitation
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