Ionia County, Michigan
Local growing conditions for Ionia County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 12 ZIP codes in our data.
Hardiness zones in Ionia County
Ionia County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Ionia County for its live forecast, frost dates, and planting calendar:
Belding 48809
Clarksville 48815
Hubbardston 48845
Ionia 48846
Lake Odessa 48849
Lyons 48851
Muir 48860
Belding 48865
Palo 48870
Pewamo 48873
Portland 48875
Saranac 48881
More for Michigan
- Agriculture in Michigan
- Frost dates across Michigan
- 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.