How many chill hours does 81611 get?

81611 averages 795 chill hours per winter, ranging from 629 to 926 across the last 10 years.

What hardiness zone is 81611?

81611 is in USDA hardiness zone 5a.

Location almanac

The short answer

81611 averages 795 chill hours per winter (629–926 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 81611’s chill hours and zone:

Chill and zone requirements are comfortably met in 81611.

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Possible in a good year or a favorable microclimate — click through for the caveats.

How many chill hours does 81611 get?: 81611 averages 795 chill hours per winter, ranging from 629 to 926 across the last 10 years.
What hardiness zone is 81611?: 81611 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