Mahaska County, Iowa
Local growing conditions for Mahaska 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 Mahaska County
Mahaska County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Mahaska County for its live forecast, frost dates, and planting calendar:
Barnes City 50027
Leighton 50143
New Sharon 50207
Beacon 52534
Fremont 52543
Fremont 52561
Oskaloosa 52577
Rose Hill 52586
University Park 52595
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.