How many chill hours does 81620 get?

81620 averages 1053 chill hours per winter, ranging from 797 to 1384 across the last 10 years.

What hardiness zone is 81620?

81620 is in USDA hardiness zone 6a.

Location almanac

The short answer

81620 averages 1,053 chill hours per winter (797–1,384 across 10 years) in USDA zone 6a.

81620 climate
Average chill hours	1,053 (797–1,384 across 10 winters)
USDA hardiness zone	6a
Last spring frost	typically June 4 – June 21
First fall frost	typically September 11 – September 25

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 81620’s chill hours and zone:

Chill and zone requirements are comfortably met in 81620.

Show 126 more good fit varieties

How many chill hours does 81620 get?: 81620 averages 1053 chill hours per winter, ranging from 797 to 1384 across the last 10 years.
What hardiness zone is 81620?: 81620 is in USDA hardiness zone 6a.

Growing fruit trees in 81620? 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