How many chill hours does 91789 get?

91789 averages 359 chill hours per winter, ranging from 186 to 645 across the last 10 years.

What hardiness zone is 91789?

91789 is in USDA hardiness zone 10a.

Location almanac

The short answer

91789 averages 359 chill hours per winter (186–645 across 10 years) in USDA zone 10a.

91789 climate
Average chill hours	359 (186–645 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 91789’s chill hours and zone:

Chill and zone requirements are comfortably met in 91789.

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 91789 get?: 91789 averages 359 chill hours per winter, ranging from 186 to 645 across the last 10 years.
What hardiness zone is 91789?: 91789 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