How many chill hours does 77504 get?

77504 averages 357 chill hours per winter, ranging from 154 to 469 across the last 10 years.

What hardiness zone is 77504?

77504 is in USDA hardiness zone 9b.

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The short answer

77504 averages 357 chill hours per winter (154–469 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 77504’s chill hours and zone:

Chill and zone requirements are comfortably met in 77504.

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

How many chill hours does 77504 get?: 77504 averages 357 chill hours per winter, ranging from 154 to 469 across the last 10 years.
What hardiness zone is 77504?: 77504 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