How many chill hours does 85123 get?

85123 averages 494 chill hours per winter, ranging from 315 to 731 across the last 10 years.

What hardiness zone is 85123?

85123 is in USDA hardiness zone 9a.

Location almanac

The short answer

85123 averages 494 chill hours per winter (315–731 across 10 years) in USDA zone 9a.

85123 climate
Average chill hours	494 (315–731 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 13 – February 17
First fall frost	typically December 15 – 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 85123’s chill hours and zone:

Chill and zone requirements are comfortably met in 85123.

Show 36 more good fit varieties

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

How many chill hours does 85123 get?: 85123 averages 494 chill hours per winter, ranging from 315 to 731 across the last 10 years.
What hardiness zone is 85123?: 85123 is in USDA hardiness zone 9a.

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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