How many chill hours does 85203 get?

85203 averages 361 chill hours per winter, ranging from 130 to 647 across the last 10 years.

What hardiness zone is 85203?

85203 is in USDA hardiness zone 9b.

Location almanac

The short answer

85203 averages 361 chill hours per winter (130–647 across 10 years) in USDA zone 9b.

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 85203’s chill hours and zone:

Chill and zone requirements are comfortably met in 85203.

Show 26 more good fit varieties

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

How many chill hours does 85203 get?: 85203 averages 361 chill hours per winter, ranging from 130 to 647 across the last 10 years.
What hardiness zone is 85203?: 85203 is in USDA hardiness zone 9b.

Growing fruit trees in 85203? 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