How many chill hours does 98631 get?

98631 averages 1724 chill hours per winter, ranging from 1272 to 2227 across the last 10 years.

What hardiness zone is 98631?

98631 is in USDA hardiness zone 9a.

Location almanac

The short answer

98631 averages 1,724 chill hours per winter (1,272–2,227 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 98631’s chill hours and zone:

Chill and zone requirements are comfortably met in 98631.

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How many chill hours does 98631 get?: 98631 averages 1724 chill hours per winter, ranging from 1272 to 2227 across the last 10 years.
What hardiness zone is 98631?: 98631 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