How many chill hours does 55920 get?

55920 averages 1240 chill hours per winter, ranging from 1085 to 1478 across the last 10 years.

What hardiness zone is 55920?

55920 is in USDA hardiness zone 4b.

Location almanac

The short answer

55920 averages 1,240 chill hours per winter (1,085–1,478 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 55920’s chill hours and zone:

Chill and zone requirements are comfortably met in 55920.

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How many chill hours does 55920 get?: 55920 averages 1240 chill hours per winter, ranging from 1085 to 1478 across the last 10 years.
What hardiness zone is 55920?: 55920 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