How many chill hours does 55309 get?

55309 averages 1140 chill hours per winter, ranging from 899 to 1436 across the last 10 years.

What hardiness zone is 55309?

55309 is in USDA hardiness zone 4b.

Location almanac

The short answer

55309 averages 1,140 chill hours per winter (899–1,436 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 55309’s chill hours and zone:

Chill and zone requirements are comfortably met in 55309.

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How many chill hours does 55309 get?: 55309 averages 1140 chill hours per winter, ranging from 899 to 1436 across the last 10 years.
What hardiness zone is 55309?: 55309 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