Sioux County, Iowa
Local growing conditions for Sioux County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 13 ZIP codes in our data.
Hardiness zones in Sioux County
Sioux County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Sioux County for its live forecast, frost dates, and planting calendar:
Sheldon 51201
Alton 51003
Chatsworth 51011
Hawarden 51023
Ireton 51027
Maurice 51036
Orange City 51041
Boyden 51234
Hospers 51238
Hull 51239
Matlock 51244
Rock Valley 51247
Sioux Center 51250
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.