How many chill hours does 51237 get?

51237 averages 1221 chill hours per winter, ranging from 870 to 1421 across the last 10 years.

What hardiness zone is 51237?

51237 is in USDA hardiness zone 5a.

Location almanac

The short answer

51237 averages 1,221 chill hours per winter (870–1,421 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 51237’s chill hours and zone:

Chill and zone requirements are comfortably met in 51237.

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How many chill hours does 51237 get?: 51237 averages 1221 chill hours per winter, ranging from 870 to 1421 across the last 10 years.
What hardiness zone is 51237?: 51237 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