How many chill hours does 57421 get?

57421 averages 1062 chill hours per winter, ranging from 635 to 1314 across the last 10 years.

What hardiness zone is 57421?

57421 is in USDA hardiness zone 4a.

Location almanac

The short answer

57421 averages 1,062 chill hours per winter (635–1,314 across 10 years) in USDA zone 4a.

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 57421’s chill hours and zone:

Chill and zone requirements are comfortably met in 57421.

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How many chill hours does 57421 get?: 57421 averages 1062 chill hours per winter, ranging from 635 to 1314 across the last 10 years.
What hardiness zone is 57421?: 57421 is in USDA hardiness zone 4a.

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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