Alger County, Michigan
Local growing conditions for Alger 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 Alger County
Alger County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Alger County for its live forecast, frost dates, and planting calendar:
Chatham 49806
Chatham 49816
Chatham 49822
Chatham 49825
Chatham 49826
Grand Marais 49839
Munising 49862
Munising 49884
Chatham 49891
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.