San Bernardino County, California
Local growing conditions for San Bernardino County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 91 ZIP codes in our data.
Hardiness zones in San Bernardino County
San Bernardino County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in San Bernardino County for its live forecast, frost dates, and planting calendar:
Rancho Cucamonga 91701
Chino 91708
Chino Hills 91709
Chino 91710
Rancho Cucamonga 91730
Rancho Cucamonga 91737
Rancho Cucamonga 91739
Ontario 91761
Ontario 91762
Montclair 91763
Ontario 91764
Upland 91784
Upland 91786
Bluewater 92242
Joshua Tree 92252
Morongo Valley 92256
Parker Strip 92267
Morongo Valley 92268
Twentynine Palms 92277
Twentynine Palms 92278
Desert Center 92280
Yucca Valley 92284
Homestead Valley 92285
Adelanto 92301
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.