Trinity County, California
Local growing conditions for Trinity 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 Trinity County
Trinity County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Trinity County for its live forecast, frost dates, and planting calendar:
Trinity Village 95527
Salyer 95563
Ruth 95595
Junction City 96010
Douglas City 96024
Hayfork 96041
Hyampom 96046
Junction City 96048
Lewiston 96052
Platina 96076
Coffee Creek 96091
Weaverville 96093
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.