Cook County, Illinois
Local growing conditions for Cook County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 167 ZIP codes in our data.
Hardiness zones in Cook County
Cook County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Cook County for its live forecast, frost dates, and planting calendar:
Wheeling 60090
Streamwood 60107
Burbank 60459
Willow Springs 60480
Arlington Heights 60004
Arlington Heights 60005
Elk Grove Village 60007
Rolling Meadows 60008
Barrington Hills 60010
Des Plaines 60016
Chicago 60018
Glencoe 60022
Glenview 60025
Glenview 60026
Golf 60029
Kenilworth 60043
Morton Grove 60053
Mount Prospect 60056
Northbrook 60062
Palatine 60067
Park Ridge 60068
Prospect Heights 60070
Palatine 60074
Skokie 60076
More for Illinois
- Agriculture in Illinois
- Frost dates across Illinois
- USDA hardiness zones explained
- Planting calendar by ZIP code
County growing conditions are compiled from our ZIP-code database, USDA hardiness-zone data, and NOAA climate normals. Conditions vary within a county by elevation and local microclimate. Page updated Aug 4, 2026.