How many chill hours does 78102 get?

78102 averages 288 chill hours per winter, ranging from 141 to 401 across the last 10 years.

What hardiness zone is 78102?

78102 is in USDA hardiness zone 9b.

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The short answer

78102 averages 288 chill hours per winter (141–401 across 10 years) in USDA zone 9b.

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 78102’s chill hours and zone:

Chill and zone requirements are comfortably met in 78102.

Show 13 more good fit varieties

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

How many chill hours does 78102 get?: 78102 averages 288 chill hours per winter, ranging from 141 to 401 across the last 10 years.
What hardiness zone is 78102?: 78102 is in USDA hardiness zone 9b.

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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