Alameda County, California
Local growing conditions for Alameda County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 49 ZIP codes in our data.
Hardiness zones in Alameda County
Alameda County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Alameda County for its live forecast, frost dates, and planting calendar:
Berkeley 94709
Berkeley 94720
Alameda 94501
Alameda 94502
Fremont 94536
Fremont 94538
Fremont 94539
Hayward 94541
Hayward 94542
Hayward 94544
Hayward 94545
Oakland 94546
Tracy 94550
Livermore 94551
Castro Valley 94552
Fremont 94555
Newark 94560
Pleasanton 94566
Dublin 94568
San Leandro 94577
Ashland 94578
San Leandro 94579
San Lorenzo 94580
Sunol 94586
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.