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Thornton, IL Weather Forecast
Thornton, IL Weather Forecast Date: 231 PM CDT Wed Sep 09 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.
Late This Afternoon... Cloudy. Temperatures in the upper 70s. West winds 5 to 10 mph.
Tonight... Mostly cloudy. Humid. Lows in the upper 60s. West winds around 5 mph.
Thursday... Mostly cloudy. Highs in the upper 70s. North winds around 5 mph.
Thursday Night... Clear. Lows in the upper 50s. East winds around 5 mph in the evening, becoming light and variable.
Friday... Sunny. Highs around 80. Southeast winds around 5 mph.
Friday Night... Clear in the evening, then becoming partly cloudy. Lows in the lower 60s. Southeast winds around 5 mph.
Saturday... Partly cloudy. Highs in the mid 80s.
Saturday Night... Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of thunderstorms in the evening. A slight chance of showers. Lows in the mid 60s. Chance of precipitation 20%.
Sunday... Partly cloudy in the morning, then becoming mostly cloudy. Highs in the lower 80s.
Sunday Night... Mostly cloudy. Lows in the mid 60s.
Monday... Mostly cloudy. Highs in the upper 80s.
Monday Night... Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. Breezy with lows in the lower 70s. Chance of precipitation 50%.
Tuesday... Mostly cloudy. A chance of showers in the afternoon. Highs in the lower 80s. Chance of precipitation 50%.
Tuesday Night... Mostly cloudy with a 30% chance of showers. Lows in the lower 60s.
POP = Probability of Precipitation
Thornton Radar Loop
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