How many chill hours does 77546 get?

77546 averages 340 chill hours per winter, ranging from 140 to 453 across the last 10 years.

What hardiness zone is 77546?

77546 is in USDA hardiness zone 9b.

Location almanac

The short answer

77546 averages 340 chill hours per winter (140–453 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 77546’s chill hours and zone:

Chill and zone requirements are comfortably met in 77546.

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

How many chill hours does 77546 get?: 77546 averages 340 chill hours per winter, ranging from 140 to 453 across the last 10 years.
What hardiness zone is 77546?: 77546 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