How many chill hours does 91911 get?

91911 averages 84 chill hours per winter, ranging from 33 to 170 across the last 10 years.

What hardiness zone is 91911?

91911 is in USDA hardiness zone 10b.

Location almanac

The short answer

91911 averages 84 chill hours per winter (33–170 across 10 years) in USDA zone 10b.

91911 climate
Average chill hours	84 (33–170 across 10 winters)
USDA hardiness zone	10b

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 91911’s chill hours and zone:

Chill and zone requirements are comfortably met in 91911.

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

How many chill hours does 91911 get?: 91911 averages 84 chill hours per winter, ranging from 33 to 170 across the last 10 years.
What hardiness zone is 91911?: 91911 is in USDA hardiness zone 10b.

Growing fruit trees in 91911? 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