El Sobrante, CA planting zone & frost dates

El Sobrante is in USDA hardiness zone 9b. Frost is rare here: in most years temperatures do not drop to 32°F.

USDA hardiness zone9bavg. extreme winter low 25°F to 30°F

FrostRarein most years the nearest weather station records no 32°F freeze

Useful for zone 9b gardens

Drip irrigation kit — saves water in long, hot seasons
Shade cloth — protects plants from midday sun
Soil moisture meter
Plants for zone 9

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Hardiness zone by ZIP code in El Sobrante

94803 zone 10a
94820 zone 9b

Nearby cities

Pinole zone 9b
Hercules zone 9b, last frost Jan 17
San Pablo zone 10a
El Cerrito zone 10a
Richmond zone 10a
Albany zone 10a
Berkeley zone 10a
Vallejo zone 9b, last frost Jan 17

All cities in California → · Other zone 9b cities →

Questions

What growing zone is El Sobrante, CA?

El Sobrante is in USDA Plant Hardiness Zone 9b (average extreme winter low 25°F to 30°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zone 10a.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Richmond, CA (USC00047414), 9.7 km (6.0 mi) from the city center, elevation 6 m, based on 25 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.