How many chill hours does 77523 get?

77523 averages 326 chill hours per winter, ranging from 147 to 434 across the last 10 years.

What hardiness zone is 77523?

77523 is in USDA hardiness zone 9b.

Location almanac

The short answer

77523 averages 326 chill hours per winter (147–434 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 77523’s chill hours and zone:

Chill and zone requirements are comfortably met in 77523.

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

How many chill hours does 77523 get?: 77523 averages 326 chill hours per winter, ranging from 147 to 434 across the last 10 years.
What hardiness zone is 77523?: 77523 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