How many chill hours does 97231 get?

97231 averages 2260 chill hours per winter, ranging from 1936 to 2651 across the last 10 years.

What hardiness zone is 97231?

97231 is in USDA hardiness zone 8b.

Location almanac

The short answer

97231 averages 2,260 chill hours per winter (1,936–2,651 across 10 years) in USDA zone 8b.

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 97231’s chill hours and zone:

Chill and zone requirements are comfortably met in 97231.

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How many chill hours does 97231 get?: 97231 averages 2260 chill hours per winter, ranging from 1936 to 2651 across the last 10 years.
What hardiness zone is 97231?: 97231 is in USDA hardiness zone 8b.

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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