How many chill hours does 55109 get?

55109 averages 1197 chill hours per winter, ranging from 1021 to 1507 across the last 10 years.

What hardiness zone is 55109?

55109 is in USDA hardiness zone 5a.

Location almanac

The short answer

55109 averages 1,197 chill hours per winter (1,021–1,507 across 10 years) in USDA zone 5a.

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 55109’s chill hours and zone:

Chill and zone requirements are comfortably met in 55109.

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How many chill hours does 55109 get?: 55109 averages 1197 chill hours per winter, ranging from 1021 to 1507 across the last 10 years.
What hardiness zone is 55109?: 55109 is in USDA hardiness zone 5a.

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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