How many chill hours does 91381 get?

91381 averages 841 chill hours per winter, ranging from 467 to 1252 across the last 10 years.

What hardiness zone is 91381?

91381 is in USDA hardiness zone 10a.

Location almanac

The short answer

91381 averages 841 chill hours per winter (467–1,252 across 10 years) in USDA zone 10a.

91381 climate
Average chill hours	841 (467–1,252 across 10 winters)
USDA hardiness zone	10a
Last spring frost	typically January 9 – February 24
First fall frost	typically November 28 – December 22

Computed from 10 winters of ERA5 hourly temperature (Open-Meteo, 2015–2025); zones from USDA PHZM 2023. Data updated July 3, 2026. See methodology.

Every variety in our database, checked against 91381’s chill hours and zone:

Chill and zone requirements are comfortably met in 91381.

Show 44 more good fit varieties

Possible in a good year or a favorable microclimate — click through for the caveats.

Marginal varieties for this location
Variety	Fruit
Cresthaven	Peach

How many chill hours does 91381 get?: 91381 averages 841 chill hours per winter, ranging from 467 to 1252 across the last 10 years.
What hardiness zone is 91381?: 91381 is in USDA hardiness zone 10a.

Growing fruit trees in 91381? Get a care calendar anchored to this exact climate, with email reminders.

[1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
[2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026