Arroyo Grande, CA planting zone & frost dates

Arroyo Grande 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 Arroyo Grande

93420 zone 9b

Nearby cities

Grover Beach zone 10a
Nipomo zone 9b, last frost Feb 4
San Luis Obispo zone 10a, last frost Jan 16
Santa Maria zone 9b, last frost Feb 4
Orcutt zone 9b, last frost Feb 4
Los Osos zone 10a
Morro Bay zone 10a
Atascadero zone 9a, last frost Mar 15

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

Questions

What growing zone is Arroyo Grande, CA?

Arroyo Grande 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 Pismo Beach, CA (USC00046943), 9.6 km (6.0 mi) from the city center, elevation 12 m, based on 14 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.