Iron County, Utah
Local growing conditions for Iron 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 Iron County
Iron County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Iron County for its live forecast, frost dates, and planting calendar:
Modena 84714
Brian Head 84719
Cedar City 84720
Cedar City 84721
Kanarraville 84742
Modena 84753
Newcastle 84756
Paragonah 84760
Parowan 84761
Summit 84772
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.