How many chill hours does 97331 get?

97331 averages 2091 chill hours per winter, ranging from 1771 to 2497 across the last 10 years.

What hardiness zone is 97331?

97331 is in USDA hardiness zone 8b.

Location almanac

The short answer

97331 averages 2,091 chill hours per winter (1,771–2,497 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 97331’s chill hours and zone:

Chill and zone requirements are comfortably met in 97331.

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How many chill hours does 97331 get?: 97331 averages 2091 chill hours per winter, ranging from 1771 to 2497 across the last 10 years.
What hardiness zone is 97331?: 97331 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