How many chill hours does 58331 get?

58331 averages 916 chill hours per winter, ranging from 532 to 1214 across the last 10 years.

What hardiness zone is 58331?

58331 is in USDA hardiness zone 3b.

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The short answer

58331 averages 916 chill hours per winter (532–1,214 across 10 years) in USDA zone 3b.

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 58331’s chill hours and zone:

Chill and zone requirements are comfortably met in 58331.

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How many chill hours does 58331 get?: 58331 averages 916 chill hours per winter, ranging from 532 to 1214 across the last 10 years.
What hardiness zone is 58331?: 58331 is in USDA hardiness zone 3b.

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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