How many chill hours does 78221 get?

78221 averages 396 chill hours per winter, ranging from 218 to 491 across the last 10 years.

What hardiness zone is 78221?

78221 is in USDA hardiness zone 9a.

Location almanac

The short answer

78221 averages 396 chill hours per winter (218–491 across 10 years) in USDA zone 9a.

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 78221’s chill hours and zone:

Chill and zone requirements are comfortably met in 78221.

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 78221 get?: 78221 averages 396 chill hours per winter, ranging from 218 to 491 across the last 10 years.
What hardiness zone is 78221?: 78221 is in USDA hardiness zone 9a.

Growing fruit trees in 78221? 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