Malheur County, Idaho
Local growing conditions for Malheur 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 Malheur County
Malheur County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Malheur County for its live forecast, frost dates, and planting calendar:
Adrian 97913
McDermitt 89421
Homedale 97901
Jordan Valley 97902
Brogan 97903
Juntura 97906
Unity 97908
Brogan 97909
Jordan Valley 97910
Juntura 97911
Ontario 97914
Juntura 97917
Vale 97918
Harper 97920
More for Idaho
- Agriculture in Idaho
- Frost dates across Idaho
- 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.