Delaware County, Iowa
Local growing conditions for Delaware 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 Delaware County
Delaware County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Delaware County for its live forecast, frost dates, and planting calendar:
Delaware 52036
Dundee 52038
Dyersville 52040
Earlville 52041
Greeley 52050
Manchester 52057
Delhi 52223
Hopkinton 52237
Ryan 52330
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.