How many chill hours does 77573 get?

77573 averages 314 chill hours per winter, ranging from 131 to 427 across the last 10 years.

What hardiness zone is 77573?

77573 is in USDA hardiness zone 9b.

Location almanac

The short answer

77573 averages 314 chill hours per winter (131–427 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 77573’s chill hours and zone:

Chill and zone requirements are comfortably met in 77573.

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

How many chill hours does 77573 get?: 77573 averages 314 chill hours per winter, ranging from 131 to 427 across the last 10 years.
What hardiness zone is 77573?: 77573 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