How many chill hours does 91204 get?

91204 averages 262 chill hours per winter, ranging from 143 to 488 across the last 10 years.

What hardiness zone is 91204?

91204 is in USDA hardiness zone 10a.

Location almanac

The short answer

91204 averages 262 chill hours per winter (143–488 across 10 years) in USDA zone 10a.

91204 climate
Average chill hours	262 (143–488 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 91204’s chill hours and zone:

Chill and zone requirements are comfortably met in 91204.

Show 2 more good fit varieties

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

How many chill hours does 91204 get?: 91204 averages 262 chill hours per winter, ranging from 143 to 488 across the last 10 years.
What hardiness zone is 91204?: 91204 is in USDA hardiness zone 10a.

Growing fruit trees in 91204? 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