How many chill hours does 98358 get?

98358 averages 2463 chill hours per winter, ranging from 2126 to 2872 across the last 10 years.

What hardiness zone is 98358?

98358 is in USDA hardiness zone 9a.

Location almanac

The short answer

98358 averages 2,463 chill hours per winter (2,126–2,872 across 10 years) in USDA zone 9a.

98358 climate
Average chill hours	2,463 (2,126–2,872 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 2 – March 16
First fall frost	typically November 29 – December 25

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 98358’s chill hours and zone:

Chill and zone requirements are comfortably met in 98358.

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How many chill hours does 98358 get?: 98358 averages 2463 chill hours per winter, ranging from 2126 to 2872 across the last 10 years.
What hardiness zone is 98358?: 98358 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