How many chill hours does 91905 get?

91905 averages 1345 chill hours per winter, ranging from 741 to 2005 across the last 10 years.

What hardiness zone is 91905?

91905 is in USDA hardiness zone 9a.

Location almanac

The short answer

91905 averages 1,345 chill hours per winter (741–2,005 across 10 years) in USDA zone 9a.

91905 climate
Average chill hours	1,345 (741–2,005 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically February 2 – April 5
First fall frost	typically November 12 – December 16

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 91905’s chill hours and zone:

Chill and zone requirements are comfortably met in 91905.

Show 87 more good fit varieties

How many chill hours does 91905 get?: 91905 averages 1345 chill hours per winter, ranging from 741 to 2005 across the last 10 years.
What hardiness zone is 91905?: 91905 is in USDA hardiness zone 9a.

Growing fruit trees in 91905? 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