How many chill hours does 98421 get?

98421 averages 2308 chill hours per winter, ranging from 2076 to 2535 across the last 10 years.

What hardiness zone is 98421?

98421 is in USDA hardiness zone 9a.

Location almanac

The short answer

98421 averages 2,308 chill hours per winter (2,076–2,535 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 98421’s chill hours and zone:

Chill and zone requirements are comfortably met in 98421.

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How many chill hours does 98421 get?: 98421 averages 2308 chill hours per winter, ranging from 2076 to 2535 across the last 10 years.
What hardiness zone is 98421?: 98421 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