How many chill hours does 28575 get?

28575 averages 807 chill hours per winter, ranging from 646 to 1025 across the last 10 years.

What hardiness zone is 28575?

28575 is in USDA hardiness zone 9a.

Location almanac

The short answer

28575 averages 807 chill hours per winter (646–1,025 across 10 years) in USDA zone 9a.

28575 climate
Average chill hours	807 (646–1,025 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically February 4 – March 16
First fall frost	typically November 29 – December 13

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 28575’s chill hours and zone:

Chill and zone requirements are comfortably met in 28575.

Show 85 more good fit varieties

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

Marginal varieties for this location
Variety	Fruit
Cresthaven	Peach
Redhaven	Peach

How many chill hours does 28575 get?: 28575 averages 807 chill hours per winter, ranging from 646 to 1025 across the last 10 years.
What hardiness zone is 28575?: 28575 is in USDA hardiness zone 9a.

Growing fruit trees in 28575? 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