How many chill hours does 85531 get?

85531 averages 653 chill hours per winter, ranging from 351 to 960 across the last 10 years.

What hardiness zone is 85531?

85531 is in USDA hardiness zone 8b.

Location almanac

The short answer

85531 averages 653 chill hours per winter (351–960 across 10 years) in USDA zone 8b.

85531 climate
Average chill hours	653 (351–960 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically January 28 – February 24
First fall frost	typically December 13 – December 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 85531’s chill hours and zone:

Chill and zone requirements are comfortably met in 85531.

Show 79 more good fit varieties

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

Show 18 more marginal varieties

How many chill hours does 85531 get?: 85531 averages 653 chill hours per winter, ranging from 351 to 960 across the last 10 years.
What hardiness zone is 85531?: 85531 is in USDA hardiness zone 8b.

Growing fruit trees in 85531? 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