How many chill hours does 85255 get?

85255 averages 668 chill hours per winter, ranging from 307 to 1024 across the last 10 years.

What hardiness zone is 85255?

85255 is in USDA hardiness zone 10a.

Location almanac

The short answer

85255 averages 668 chill hours per winter (307–1,024 across 10 years) in USDA zone 10a.

85255 climate
Average chill hours	668 (307–1,024 across 10 winters)
USDA hardiness zone	10a
Last spring frost	typically January 27 – February 24
First fall frost	typically November 28 – 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 85255’s chill hours and zone:

Chill and zone requirements are comfortably met in 85255.

Show 25 more good fit varieties

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

How many chill hours does 85255 get?: 85255 averages 668 chill hours per winter, ranging from 307 to 1024 across the last 10 years.
What hardiness zone is 85255?: 85255 is in USDA hardiness zone 10a.

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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