How many chill hours does 98020 get?

98020 averages 2402 chill hours per winter, ranging from 2190 to 2754 across the last 10 years.

What hardiness zone is 98020?

98020 is in USDA hardiness zone 9a.

Location almanac

The short answer

98020 averages 2,402 chill hours per winter (2,190–2,754 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 98020’s chill hours and zone:

Chill and zone requirements are comfortably met in 98020.

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How many chill hours does 98020 get?: 98020 averages 2402 chill hours per winter, ranging from 2190 to 2754 across the last 10 years.
What hardiness zone is 98020?: 98020 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