How many chill hours does 91306 get?

91306 averages 389 chill hours per winter, ranging from 219 to 709 across the last 10 years.

What hardiness zone is 91306?

91306 is in USDA hardiness zone 10a.

Location almanac

The short answer

91306 averages 389 chill hours per winter (219–709 across 10 years) in USDA zone 10a.

91306 climate
Average chill hours	389 (219–709 across 10 winters)
USDA hardiness zone	10a

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 91306’s chill hours and zone:

Chill and zone requirements are comfortably met in 91306.

Show 13 more good fit varieties

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

How many chill hours does 91306 get?: 91306 averages 389 chill hours per winter, ranging from 219 to 709 across the last 10 years.
What hardiness zone is 91306?: 91306 is in USDA hardiness zone 10a.

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[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