Summit County, Utah
Local growing conditions for Summit 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 Summit County
Summit County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Summit County for its live forecast, frost dates, and planting calendar:
Park City 84060
Coalville 84017
Henefer 84024
Henefer 84033
Samak 84036
Oakley 84055
Peoa 84061
Silver Summit 84098
More for Utah
- Agriculture in Utah
- Frost dates across Utah
- 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.