How many chill hours does 85742 get?

85742 averages 502 chill hours per winter, ranging from 260 to 708 across the last 10 years.

What hardiness zone is 85742?

85742 is in USDA hardiness zone 9b.

Location almanac

The short answer

85742 averages 502 chill hours per winter (260–708 across 10 years) in USDA zone 9b.

85742 climate
Average chill hours	502 (260–708 across 10 winters)
USDA hardiness zone	9b
Last spring frost	typically January 23 – February 16
First fall frost	typically November 30 – December 22

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 85742’s chill hours and zone:

Chill and zone requirements are comfortably met in 85742.

Show 48 more good fit varieties

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

How many chill hours does 85742 get?: 85742 averages 502 chill hours per winter, ranging from 260 to 708 across the last 10 years.
What hardiness zone is 85742?: 85742 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