How many chill hours does 55328 get?

55328 averages 1184 chill hours per winter, ranging from 984 to 1449 across the last 10 years.

What hardiness zone is 55328?

55328 is in USDA hardiness zone 4b.

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The short answer

55328 averages 1,184 chill hours per winter (984–1,449 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 55328’s chill hours and zone:

Chill and zone requirements are comfortably met in 55328.

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How many chill hours does 55328 get?: 55328 averages 1184 chill hours per winter, ranging from 984 to 1449 across the last 10 years.
What hardiness zone is 55328?: 55328 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