St. Joseph County, Michigan
Local growing conditions for St. Joseph County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 10 ZIP codes in our data.
Hardiness zones in St. Joseph County
St. Joseph County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in St. Joseph County for its live forecast, frost dates, and planting calendar:
Burr Oak 49030
Centreville 49032
Colon 49040
Constantine 49042
Colon 49066
Mendon 49072
Centreville 49075
Sturgis 49091
Three Rivers 49093
White Pigeon 49099
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.