Monona County, Iowa
Local growing conditions for Monona 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 Monona County
Monona County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Monona County for its live forecast, frost dates, and planting calendar:
Mapleton 51034
Castana 51010
Onawa 51040
Rodney 51051
Ute 51060
Whiting 51063
Blencoe 51523
Moorhead 51558
Soldier 51572
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.