How many chill hours does 71428 get?

71428 averages 658 chill hours per winter, ranging from 326 to 791 across the last 10 years.

What hardiness zone is 71428?

71428 is in USDA hardiness zone 9a.

Location almanac

The short answer

71428 averages 658 chill hours per winter (326–791 across 10 years) in USDA zone 9a.

71428 climate
Average chill hours	658 (326–791 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 24 – March 13
First fall frost	typically November 15 – December 11

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 71428’s chill hours and zone:

Chill and zone requirements are comfortably met in 71428.

Show 55 more good fit varieties

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

How many chill hours does 71428 get?: 71428 averages 658 chill hours per winter, ranging from 326 to 791 across the last 10 years.
What hardiness zone is 71428?: 71428 is in USDA hardiness zone 9a.

Growing fruit trees in 71428? 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