Cerro Gordo County, Iowa
Local growing conditions for Cerro Gordo County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 9 ZIP codes in our data.
Hardiness zones in Cerro Gordo County
Cerro Gordo County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Cerro Gordo County for its live forecast, frost dates, and planting calendar:
Mason City 50401
Clear Lake 50428
Dougherty 50433
Plymouth 50464
Rock Falls 50467
Rockwell 50469
Swaledale 50477
Thornton 50479
Ventura 50482
More for Iowa
- Agriculture in Iowa
- Frost dates across Iowa
- 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.