How many chill hours does 77960 get?

77960 averages 304 chill hours per winter, ranging from 132 to 421 across the last 10 years.

What hardiness zone is 77960?

77960 is in USDA hardiness zone 9b.

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The short answer

77960 averages 304 chill hours per winter (132–421 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 77960’s chill hours and zone:

Chill and zone requirements are comfortably met in 77960.

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

How many chill hours does 77960 get?: 77960 averages 304 chill hours per winter, ranging from 132 to 421 across the last 10 years.
What hardiness zone is 77960?: 77960 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