How many chill hours does 91916 get?

91916 averages 1109 chill hours per winter, ranging from 635 to 1710 across the last 10 years.

What hardiness zone is 91916?

91916 is in USDA hardiness zone 9b.

Location almanac

The short answer

91916 averages 1,109 chill hours per winter (635–1,710 across 10 years) in USDA zone 9b.

91916 climate
Average chill hours	1,109 (635–1,710 across 10 winters)
USDA hardiness zone	9b
Last spring frost	typically February 2 – April 5
First fall frost	typically December 8 – December 29

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 91916’s chill hours and zone:

Chill and zone requirements are comfortably met in 91916.

Show 87 more good fit varieties

How many chill hours does 91916 get?: 91916 averages 1109 chill hours per winter, ranging from 635 to 1710 across the last 10 years.
What hardiness zone is 91916?: 91916 is in USDA hardiness zone 9b.

Growing fruit trees in 91916? 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