Hayward, CA planting zone & frost dates

Hayward is in USDA hardiness zone 10a. Frost is rare here: in most years temperatures do not drop to 32°F.

USDA hardiness zone10aavg. extreme winter low 30°F to 35°F

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

Useful for zone 10a gardens

Drip irrigation kit — saves water in long, hot seasons
Shade cloth — protects plants from midday sun
Soil moisture meter
Plants for zone 10

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Hardiness zone by ZIP code in Hayward

94540 zone 10a
94541 zone 10a
94542 zone 9b
94543 zone 10a
94544 zone 9b
94545 zone 10a
94557 zone 10a

Nearby cities

Cherryland zone 10a
Castro Valley zone 10a
Fairview zone 9b
Ashland zone 10a
San Lorenzo zone 10a
San Leandro zone 10a, last frost Jan 7
Union City zone 9b, last frost Jan 7
Newark zone 10a

All cities in California → · Other zone 10a cities →

Questions

What growing zone is Hayward, CA?

Hayward is in USDA Plant Hardiness Zone 10a (average extreme winter low 30°F to 35°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zone 9b.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Hayward Air Terminal, CA (USW00093228), 3.4 km (2.1 mi) from the city center, elevation 13 m, based on 21 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.