How many chill hours does 81055 get?

81055 averages 1275 chill hours per winter, ranging from 947 to 1752 across the last 10 years.

What hardiness zone is 81055?

81055 is in USDA hardiness zone 6a.

Location almanac

The short answer

81055 averages 1,275 chill hours per winter (947–1,752 across 10 years) in USDA zone 6a.

81055 climate
Average chill hours	1,275 (947–1,752 across 10 winters)
USDA hardiness zone	6a
Last spring frost	typically May 25 – June 10
First fall frost	typically September 21 – October 17

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 81055’s chill hours and zone:

Chill and zone requirements are comfortably met in 81055.

Show 126 more good fit varieties

How many chill hours does 81055 get?: 81055 averages 1275 chill hours per winter, ranging from 947 to 1752 across the last 10 years.
What hardiness zone is 81055?: 81055 is in USDA hardiness zone 6a.

Growing fruit trees in 81055? Get a care calendar anchored to this exact climate, with email reminders.

[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