How many chill hours does 78642 get?

78642 averages 629 chill hours per winter, ranging from 322 to 924 across the last 10 years.

What hardiness zone is 78642?

78642 is in USDA hardiness zone 8b.

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The short answer

78642 averages 629 chill hours per winter (322–924 across 10 years) in USDA zone 8b.

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 78642’s chill hours and zone:

Chill and zone requirements are comfortably met in 78642.

Show 78 more good fit varieties

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

Show 19 more marginal varieties

How many chill hours does 78642 get?: 78642 averages 629 chill hours per winter, ranging from 322 to 924 across the last 10 years.
What hardiness zone is 78642?: 78642 is in USDA hardiness zone 8b.

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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