Grundy County, Iowa
Local growing conditions for Grundy 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 Grundy County
Grundy County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Grundy County for its live forecast, frost dates, and planting calendar:
Beaman 50609
Conrad 50621
Dike 50624
Grundy Center 50638
Holland 50642
Morrison 50657
Reinbeck 50669
Stout 50673
Wellsburg 50680
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.