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Thornton, IL Weather Forecast
Thornton, IL Weather Forecast Date: 120 AM CDT Sat Sep 12 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.
Rest of Tonight... Partly cloudy. Lows in the mid 60s. South winds around 5 mph.
Saturday... Partly cloudy. Humid with highs in the upper 80s. Southwest winds 5 to 10 mph.
Saturday Night... Partly cloudy. Lows in the mid 60s. Northwest winds around 5 mph.
Sunday... Partly cloudy in the morning, then becoming mostly cloudy. A chance of showers in the afternoon. Highs in the mid 70s. North winds 5 to 10 mph. Chance of precipitation 40%.
Sunday Night... Partly cloudy in the evening, then clearing. Lows in the mid 50s. Northeast winds around 5 mph.
Monday... Partly cloudy. Highs in the mid 70s.
Monday Night... Mostly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of precipitation 30%.
Tuesday... Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of precipitation 50%.
Tuesday Night... Showers with a chance of thunderstorms. Lows in the mid 60s. Chance of precipitation 80%.
Wednesday... Showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs around 80. Chance of precipitation 80%.
Wednesday 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 precipitation 70%.
Thursday... A chance of showers in the morning. Mostly cloudy. Highs in the upper 70s. Chance of precipitation 40%.
Thursday Night... Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers after midnight. Lows in the lower 60s. Chance of precipitation 30%.
POP = Probability of Precipitation
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