South Chicago Heights, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Chicago Heights, a village in Cook County, Illinois.
Today
79°F
Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers and thunderstorms before noon, then showers and thunderstorms likely. Cloudy. High near 79, with temperatures falling to around 76 in the afternoon. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for South Chicago Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph SE | 97% |
| Tonight | 65°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 mph S | 92% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 5 to 15 mph N | 64% |
| Sunday Night | 56°F | Chance Showers And Thunderstorms | 15 mph NE | 40% |
| Monday | 66°F | Chance Rain Showers | 15 mph NE | 41% |
| Monday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 30% |
| Tuesday | 64°F | Slight Chance Rain Showers | 10 to 15 mph NE | 17% |
| Tuesday Night | 53°F | Mostly Cloudy | 10 to 15 mph NE | 12% |
| Wednesday | 66°F | Partly Sunny | 10 mph NE | 11% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NNE | 3% |
| Thursday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 3% |
| Friday | 71°F | Mostly Sunny | 5 to 10 mph NNE | 3% |
| Friday Night | 54°F | Partly Cloudy | 0 to 10 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for South Chicago Heights (41.483, -87.637). Updated through the day.
Growing snapshot for South Chicago Heights
Last spring frost
Apr 23
First fall frost
Oct 20
Growing season
179 days
Hardiness zone
6a
More local growing data for South Chicago Heights: nearby ZIP 60475 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Park Forest, Il (3.1 mi from South Chicago Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.