Chicago Heights, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chicago Heights, a city in Cook County, Illinois.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind 5 to 10 mph.
7-day forecast for Chicago Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 to 10 mph SSW | 1% |
| Tonight | 66°F | Partly Cloudy | 5 mph SSW | 3% |
| Wednesday | 82°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph SW | 44% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph WSW | 88% |
| Thursday | 79°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 88% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 48% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SW | 6% |
| Friday Night | 64°F | Partly Cloudy | 0 to 5 mph SSW | 8% |
| Saturday | 84°F | Mostly Sunny | 5 mph SSW | 9% |
| Saturday Night | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSW | 15% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 15% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 39% |
| Monday | 86°F | Chance Rain Showers | 5 to 10 mph SW | 39% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 45% |
Forecast source: National Weather Service (api.weather.gov) for Chicago Heights (41.511, -87.635). Updated through the day.
Growing snapshot for Chicago Heights
Last spring frost
Apr 23
First fall frost
Oct 20
Growing season
179 days
Hardiness zone
6a
More local growing data for Chicago Heights: nearby ZIP 60475 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
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Calumet City
Calumet Park
Chicago
Chicago Ridge
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Country Club Hills
Countryside
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East Hazel Crest
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Climate data from the nearest NOAA station, Park Forest, Il (3.1 mi from Chicago Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.