How many chill hours does 97431 get?

97431 averages 2351 chill hours per winter, ranging from 2144 to 2575 across the last 10 years.

What hardiness zone is 97431?

97431 is in USDA hardiness zone 9a.

Location almanac

The short answer

97431 averages 2,351 chill hours per winter (2,144–2,575 across 10 years) in USDA zone 9a.

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 97431’s chill hours and zone:

Chill and zone requirements are comfortably met in 97431.

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How many chill hours does 97431 get?: 97431 averages 2351 chill hours per winter, ranging from 2144 to 2575 across the last 10 years.
What hardiness zone is 97431?: 97431 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