Carbon County, Montana
Local growing conditions for Carbon 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 Carbon County
Carbon County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Carbon County for its live forecast, frost dates, and planting calendar:
Bearcreek 59007
Belfry 59008
Boyd 59013
Frannie 59014
Edgar 59026
Fromberg 59029
Joliet 59041
Luther 59068
Roberts 59070
Roscoe 59071
More for Montana
- Agriculture in Montana
- Frost dates across Montana
- 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.