How many chill hours does 81228 get?

81228 averages 1055 chill hours per winter, ranging from 818 to 1332 across the last 10 years.

What hardiness zone is 81228?

81228 is in USDA hardiness zone 5a.

Location almanac

The short answer

81228 averages 1,055 chill hours per winter (818–1,332 across 10 years) in USDA zone 5a.

81228 climate
Average chill hours	1,055 (818–1,332 across 10 winters)
USDA hardiness zone	5a
Last spring frost	typically June 4 – June 18
First fall frost	typically September 9 – October 3

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 81228’s chill hours and zone:

Chill and zone requirements are comfortably met in 81228.

Show 122 more good fit varieties

How many chill hours does 81228 get?: 81228 averages 1055 chill hours per winter, ranging from 818 to 1332 across the last 10 years.
What hardiness zone is 81228?: 81228 is in USDA hardiness zone 5a.

Growing fruit trees in 81228? 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