How many chill hours does 81635 get?

81635 averages 935 chill hours per winter, ranging from 606 to 1385 across the last 10 years.

What hardiness zone is 81635?

81635 is in USDA hardiness zone 6a.

Location almanac

The short answer

81635 averages 935 chill hours per winter (606–1,385 across 10 years) in USDA zone 6a.

81635 climate
Average chill hours	935 (606–1,385 across 10 winters)
USDA hardiness zone	6a
Last spring frost	typically May 16 – June 11
First fall frost	typically September 21 – October 19

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 81635’s chill hours and zone:

Chill and zone requirements are comfortably met in 81635.

Show 124 more good fit varieties

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

Marginal varieties for this location
Variety	Fruit
Rome Beauty	Apple
Reliance	Peach

How many chill hours does 81635 get?: 81635 averages 935 chill hours per winter, ranging from 606 to 1385 across the last 10 years.
What hardiness zone is 81635?: 81635 is in USDA hardiness zone 6a.

Growing fruit trees in 81635? 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