How many chill hours does 78225 get?

78225 averages 422 chill hours per winter, ranging from 239 to 535 across the last 10 years.

What hardiness zone is 78225?

78225 is in USDA hardiness zone 9a.

Location almanac

The short answer

78225 averages 422 chill hours per winter (239–535 across 10 years) in USDA zone 9a.

78225 climate
Average chill hours	422 (239–535 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 17 – March 6
First fall frost	typically November 12 – December 19

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 78225’s chill hours and zone:

Chill and zone requirements are comfortably met in 78225.

Show 34 more good fit varieties

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

How many chill hours does 78225 get?: 78225 averages 422 chill hours per winter, ranging from 239 to 535 across the last 10 years.
What hardiness zone is 78225?: 78225 is in USDA hardiness zone 9a.

Growing fruit trees in 78225? 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