How many chill hours does 81403 get?

81403 averages 1360 chill hours per winter, ranging from 1119 to 1673 across the last 10 years.

What hardiness zone is 81403?

81403 is in USDA hardiness zone 6a.

Location almanac

The short answer

81403 averages 1,360 chill hours per winter (1,119–1,673 across 10 years) in USDA zone 6a.

81403 climate
Average chill hours	1,360 (1,119–1,673 across 10 winters)
USDA hardiness zone	6a
Last spring frost	typically May 4 – June 10
First fall frost	typically September 25 – October 24

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 81403’s chill hours and zone:

Chill and zone requirements are comfortably met in 81403.

Show 126 more good fit varieties

How many chill hours does 81403 get?: 81403 averages 1360 chill hours per winter, ranging from 1119 to 1673 across the last 10 years.
What hardiness zone is 81403?: 81403 is in USDA hardiness zone 6a.

Growing fruit trees in 81403? 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