Mason County, Washington
Local growing conditions for Mason 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 Mason County
Mason County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Mason County for its live forecast, frost dates, and planting calendar:
Shelton 98584
Allyn 98524
Belfair 98528
Grapeview 98546
Hoodsport 98548
Brinnon 98555
Skokomish 98560
Hoodsport 98588
Union 98592
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.