Humboldt County, California
Local growing conditions for Humboldt County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 35 ZIP codes in our data.
Hardiness zones in Humboldt County
Humboldt County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Humboldt County for its live forecast, frost dates, and planting calendar:
Eureka 95501
Pine Hills 95503
Alderpoint 95511
Phillipsville 95514
McKinleyville 95519
Arcata 95521
Indianola 95524
Willow Creek 95525
Mad River 95526
Redcrest 95528
Rio Dell 95536
Fields Landing 95537
Fortuna 95540
Garberville 95542
Weott 95545
Weitchpec 95546
Hydesville 95547
Arcata 95549
Arcata 95550
Loleta 95551
Miranda 95553
Miranda 95554
Orick 95555
Weitchpec 95556
More for California
- Agriculture in California
- Frost dates across California
- 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.