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Illinois School, IL Weather Forecast
Illinois School, IL Weather Forecast Date: 146 PM CDT Sat Oct 31 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.
This Afternoon... Cloudy. Scattered showers early in the afternoon, then isolated showers late. Nearly steady temperatures in the lower 60s. Southeast winds around 5 mph. Chance of precipitation 30%.
Tonight... Cloudy. A slight chance of showers in the late evening and overnight. Lows in the lower 50s. Southeast winds around 5 mph. Chance of precipitation 20%.
Sunday... Mostly cloudy. A slight chance of showers. Highs in the mid 60s. South winds around 5 mph. Chance of precipitation 20%.
Sunday Night... Mostly cloudy. Lows in the lower 50s. South winds 5 to 10 mph.
Monday... Mostly cloudy. A slight chance of showers in the afternoon. Highs in the upper 60s. South winds 10 to 15 mph. Gusts up to 25 mph in the afternoon. Chance of precipitation 20%.
Monday Night... Cloudy with a 40% chance of showers. Nearly steady temperatures around 60.
Tuesday... Mostly cloudy. A chance of showers in the morning, then showers likely in the afternoon. Breezy with highs in the lower 70s. Chance of precipitation 70%.
Tuesday Night... Mostly cloudy. Showers likely, mainly in the evening. Lows in the mid 50s. Chance of precipitation 70%.
Wednesday... Mostly cloudy with a 50% chance of showers. Highs in the upper 60s.
Wednesday Night... Mostly cloudy. A chance of showers in the evening. Lows in the upper 40s. Chance of precipitation 30%.
Thursday... Mostly cloudy. Highs in the mid 60s.
Thursday Night... Mostly cloudy with a 30% chance of showers. Lows in the upper 40s.
POP = Probability of Precipitation
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