How many chill hours does 81239 get?

81239 averages 897 chill hours per winter, ranging from 660 to 1190 across the last 10 years.

What hardiness zone is 81239?

81239 is in USDA hardiness zone 4b.

Location almanac

The short answer

81239 averages 897 chill hours per winter (660–1,190 across 10 years) in USDA zone 4b.

81239 climate
Average chill hours	897 (660–1,190 across 10 winters)
USDA hardiness zone	4b
Last spring frost	typically June 1 – June 17
First fall frost	typically September 16 – October 4

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 81239’s chill hours and zone:

Chill and zone requirements are comfortably met in 81239.

Show 87 more good fit varieties

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

How many chill hours does 81239 get?: 81239 averages 897 chill hours per winter, ranging from 660 to 1190 across the last 10 years.
What hardiness zone is 81239?: 81239 is in USDA hardiness zone 4b.

Growing fruit trees in 81239? 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