How many chill hours does 81223 get?

81223 averages 1183 chill hours per winter, ranging from 961 to 1473 across the last 10 years.

What hardiness zone is 81223?

81223 is in USDA hardiness zone 5b.

Location almanac

The short answer

81223 averages 1,183 chill hours per winter (961–1,473 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 81223’s chill hours and zone:

Chill and zone requirements are comfortably met in 81223.

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How many chill hours does 81223 get?: 81223 averages 1183 chill hours per winter, ranging from 961 to 1473 across the last 10 years.
What hardiness zone is 81223?: 81223 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