Grant County, Washington
Local growing conditions for Grant 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 Grant County
Grant County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Grant County for its live forecast, frost dates, and planting calendar:
Ephrata 98823
George 98824
Krupp 98832
Cascade Valley 98837
Quincy 98848
Soap Lake 98851
Wilson Creek 98853
Warden 98857
Wilson Creek 98860
Electric City 99123
Hartline 99135
Beverly 99321
Mattawa 99349
Royal City 99357
More for Washington
- Agriculture in Washington
- Frost dates across Washington
- 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.