How many chill hours does 97817 get?

97817 averages 872 chill hours per winter, ranging from 497 to 1237 across the last 10 years.

What hardiness zone is 97817?

97817 is in USDA hardiness zone 6b.

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The short answer

97817 averages 872 chill hours per winter (497–1,237 across 10 years) in USDA zone 6b.

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 97817’s chill hours and zone:

Chill and zone requirements are comfortably met in 97817.

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Possible in a good year or a favorable microclimate — click through for the caveats.

How many chill hours does 97817 get?: 97817 averages 872 chill hours per winter, ranging from 497 to 1237 across the last 10 years.
What hardiness zone is 97817?: 97817 is in USDA hardiness zone 6b.

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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