How many chill hours does 55321 get?

55321 averages 1118 chill hours per winter, ranging from 800 to 1398 across the last 10 years.

What hardiness zone is 55321?

55321 is in USDA hardiness zone 4b.

Location almanac

The short answer

55321 averages 1,118 chill hours per winter (800–1,398 across 10 years) in USDA zone 4b.

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 55321’s chill hours and zone:

Chill and zone requirements are comfortably met in 55321.

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How many chill hours does 55321 get?: 55321 averages 1118 chill hours per winter, ranging from 800 to 1398 across the last 10 years.
What hardiness zone is 55321?: 55321 is in USDA hardiness zone 4b.

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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