Harrison County, Iowa
Local growing conditions for Harrison County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 10 ZIP codes in our data.
Hardiness zones in Harrison County
Harrison County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Harrison County for its live forecast, frost dates, and planting calendar:
Dunlap 51529
Little Sioux 51545
Logan 51546
Magnolia 51550
Missouri Valley 51555
Modale 51556
Mondamin 51557
Persia 51563
Pisgah 51564
Woodbine 51579
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.