How many chill hours does 78230 get?

78230 averages 452 chill hours per winter, ranging from 242 to 572 across the last 10 years.

What hardiness zone is 78230?

78230 is in USDA hardiness zone 9a.

Location almanac

The short answer

78230 averages 452 chill hours per winter (242–572 across 10 years) in USDA zone 9a.

78230 climate
Average chill hours	452 (242–572 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 78230’s chill hours and zone:

Chill and zone requirements are comfortably met in 78230.

Show 36 more good fit varieties

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

How many chill hours does 78230 get?: 78230 averages 452 chill hours per winter, ranging from 242 to 572 across the last 10 years.
What hardiness zone is 78230?: 78230 is in USDA hardiness zone 9a.

Growing fruit trees in 78230? 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