Winneshiek County, Iowa
Local growing conditions for Winneshiek County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 7 ZIP codes in our data.
Hardiness zones in Winneshiek County
Winneshiek County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Winneshiek County for its live forecast, frost dates, and planting calendar:
Decorah 52101
Spillville 52132
Castalia 52133
Fort Atkinson 52144
Ossian 52161
Ridgeway 52165
Spillville 52168
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.