Chicago Heights, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chicago Heights, a city in Cook County, Illinois.
Tonight
63°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 63. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Chicago Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph E | 39% |
| Saturday | 79°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 81% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 5 mph SSW | 82% |
| Sunday | 70°F | Showers And Thunderstorms | 5 to 15 mph NNE | 82% |
| Sunday Night | 56°F | Rain Showers Likely | 15 mph NE | 66% |
| Monday | 66°F | Showers And Thunderstorms Likely | 15 mph ENE | 58% |
| Monday Night | 53°F | Chance Rain Showers | 10 to 15 mph ENE | 34% |
| Tuesday | 65°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday Night | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 17% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph NNE | 10% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 69°F | Partly Sunny | 5 to 10 mph NNE | 6% |
| Thursday Night | 55°F | Mostly Cloudy | 0 to 10 mph NNE | 2% |
| Friday | 71°F | Mostly Sunny | 0 to 10 mph NNE | 4% |
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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Brookfield
Burbank
Burnham
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 Sep 19, 2026.