How many chill hours does 97227 get?

97227 averages 2187 chill hours per winter, ranging from 1872 to 2667 across the last 10 years.

What hardiness zone is 97227?

97227 is in USDA hardiness zone 9a.

Location almanac

The short answer

97227 averages 2,187 chill hours per winter (1,872–2,667 across 10 years) in USDA zone 9a.

97227 climate
Average chill hours	2,187 (1,872–2,667 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically March 9 – April 11
First fall frost	typically November 9 – December 8

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 97227’s chill hours and zone:

Chill and zone requirements are comfortably met in 97227.

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How many chill hours does 97227 get?: 97227 averages 2187 chill hours per winter, ranging from 1872 to 2667 across the last 10 years.
What hardiness zone is 97227?: 97227 is in USDA hardiness zone 9a.

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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