How many chill hours does 91702 get?

91702 averages 1738 chill hours per winter, ranging from 1093 to 2203 across the last 10 years.

What hardiness zone is 91702?

91702 is in USDA hardiness zone 9b.

Location almanac

The short answer

91702 averages 1,738 chill hours per winter (1,093–2,203 across 10 years) in USDA zone 9b.

91702 climate
Average chill hours	1,738 (1,093–2,203 across 10 winters)
USDA hardiness zone	9b
Last spring frost	typically March 25 – May 11
First fall frost	typically November 3 – December 3

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 91702’s chill hours and zone:

Chill and zone requirements are comfortably met in 91702.

Show 87 more good fit varieties

How many chill hours does 91702 get?: 91702 averages 1738 chill hours per winter, ranging from 1093 to 2203 across the last 10 years.
What hardiness zone is 91702?: 91702 is in USDA hardiness zone 9b.

Growing fruit trees in 91702? 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