How many chill hours does 78012 get?

78012 averages 321 chill hours per winter, ranging from 173 to 405 across the last 10 years.

What hardiness zone is 78012?

78012 is in USDA hardiness zone 9a.

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The short answer

78012 averages 321 chill hours per winter (173–405 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 78012’s chill hours and zone:

Chill and zone requirements are comfortably met in 78012.

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

How many chill hours does 78012 get?: 78012 averages 321 chill hours per winter, ranging from 173 to 405 across the last 10 years.
What hardiness zone is 78012?: 78012 is in USDA hardiness zone 9a.

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[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