Umatilla County, Oregon
Local growing conditions for Umatilla County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 13 ZIP codes in our data.
Hardiness zones in Umatilla County
Umatilla County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Umatilla County for its live forecast, frost dates, and planting calendar:
Pendleton 97801
Hermiston 97838
Meacham 97859
Cayuse 97810
Athena 97813
Echo 97826
Helix 97835
Milton-Freewater 97862
Pilot Rock 97868
Stanfield 97875
Umatilla 97882
Weston 97886
More for Oregon
- Agriculture in Oregon
- Frost dates across Oregon
- 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.