How many chill hours does 55901 get?

55901 averages 1252 chill hours per winter, ranging from 1096 to 1479 across the last 10 years.

What hardiness zone is 55901?

55901 is in USDA hardiness zone 4b.

Location almanac

The short answer

55901 averages 1,252 chill hours per winter (1,096–1,479 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 55901’s chill hours and zone:

Chill and zone requirements are comfortably met in 55901.

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How many chill hours does 55901 get?: 55901 averages 1252 chill hours per winter, ranging from 1096 to 1479 across the last 10 years.
What hardiness zone is 55901?: 55901 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