How many chill hours does 77963 get?

77963 averages 312 chill hours per winter, ranging from 143 to 434 across the last 10 years.

What hardiness zone is 77963?

77963 is in USDA hardiness zone 9a.

Location almanac

The short answer

77963 averages 312 chill hours per winter (143–434 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 77963’s chill hours and zone:

Chill and zone requirements are comfortably met in 77963.

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

How many chill hours does 77963 get?: 77963 averages 312 chill hours per winter, ranging from 143 to 434 across the last 10 years.
What hardiness zone is 77963?: 77963 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