How many chill hours does 66503 get?

66503 averages 1400 chill hours per winter, ranging from 1172 to 1742 across the last 10 years.

What hardiness zone is 66503?

66503 is in USDA hardiness zone 6b.

Location almanac

The short answer

66503 averages 1,400 chill hours per winter (1,172–1,742 across 10 years) in USDA zone 6b.

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 66503’s chill hours and zone:

Chill and zone requirements are comfortably met in 66503.

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How many chill hours does 66503 get?: 66503 averages 1400 chill hours per winter, ranging from 1172 to 1742 across the last 10 years.
What hardiness zone is 66503?: 66503 is in USDA hardiness zone 6b.

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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