Alhambra, CA planting zone & frost dates

Alhambra 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 Alhambra

91801 zone 10a
91802 zone 10a
91803 zone 10b
91804 zone 10a
91896 zone 10a
91899 zone 10a

Nearby cities

San Gabriel zone 10a
South Pasadena zone 10a
Monterey Park zone 10b
San Marino zone 10a
Pasadena zone 10b
Rosemead zone 10b
Temple City zone 10a
East Los Angeles zone 10b

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

Questions

What growing zone is Alhambra, CA?

Alhambra 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 10b.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station San Gabriel Fire Dept, CA (USC00047785), 2.8 km (1.7 mi) from the city center, elevation 111 m, based on 18 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.