How many chill hours does 85707 get?

85707 averages 588 chill hours per winter, ranging from 286 to 842 across the last 10 years.

What hardiness zone is 85707?

85707 is in USDA hardiness zone 9b.

Location almanac

The short answer

85707 averages 588 chill hours per winter (286–842 across 10 years) in USDA zone 9b.

85707 climate
Average chill hours	588 (286–842 across 10 winters)
USDA hardiness zone	9b
Last spring frost	typically January 22 – February 27
First fall frost	typically December 1 – 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 85707’s chill hours and zone:

Chill and zone requirements are comfortably met in 85707.

Show 48 more good fit varieties

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

Show 7 more marginal varieties

How many chill hours does 85707 get?: 85707 averages 588 chill hours per winter, ranging from 286 to 842 across the last 10 years.
What hardiness zone is 85707?: 85707 is in USDA hardiness zone 9b.

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[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