How many chill hours does 85730 get?

85730 averages 488 chill hours per winter, ranging from 245 to 806 across the last 10 years.

What hardiness zone is 85730?

85730 is in USDA hardiness zone 9a.

Location almanac

The short answer

85730 averages 488 chill hours per winter (245–806 across 10 years) in USDA zone 9a.

85730 climate
Average chill hours	488 (245–806 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 23 – February 24
First fall frost	typically November 30 – December 29

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 85730’s chill hours and zone:

Chill and zone requirements are comfortably met in 85730.

Show 36 more good fit varieties

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

Show 19 more marginal varieties

How many chill hours does 85730 get?: 85730 averages 488 chill hours per winter, ranging from 245 to 806 across the last 10 years.
What hardiness zone is 85730?: 85730 is in USDA hardiness zone 9a.

Growing fruit trees in 85730? 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