How many chill hours does 51638 get?

51638 averages 1375 chill hours per winter, ranging from 1118 to 1639 across the last 10 years.

What hardiness zone is 51638?

51638 is in USDA hardiness zone 5b.

Location almanac

The short answer

51638 averages 1,375 chill hours per winter (1,118–1,639 across 10 years) in USDA zone 5b.

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 51638’s chill hours and zone:

Chill and zone requirements are comfortably met in 51638.

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How many chill hours does 51638 get?: 51638 averages 1375 chill hours per winter, ranging from 1118 to 1639 across the last 10 years.
What hardiness zone is 51638?: 51638 is in USDA hardiness zone 5b.

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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