Flathead County, Montana
Local growing conditions for Flathead County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 14 ZIP codes in our data.
Hardiness zones in Flathead County
Flathead County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Flathead County for its live forecast, frost dates, and planting calendar:
Martin City 59926
Polebridge 59928
Kalispell 59901
Columbia Falls 59912
Coram 59913
Essex 59916
Hungry Horse 59919
Lakeside 59922
Marion 59925
Olney 59927
Lakeside 59932
Snowslip 59936
Whitefish 59937
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.