How many chill hours does 77389 get?

77389 averages 459 chill hours per winter, ranging from 195 to 577 across the last 10 years.

What hardiness zone is 77389?

77389 is in USDA hardiness zone 9b.

Location almanac

The short answer

77389 averages 459 chill hours per winter (195–577 across 10 years) in USDA zone 9b.

77389 climate
Average chill hours	459 (195–577 across 10 winters)
USDA hardiness zone	9b
Last spring frost	typically January 18 – February 26
First fall frost	typically November 13 – December 20

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 77389’s chill hours and zone:

Chill and zone requirements are comfortably met in 77389.

Show 36 more good fit varieties

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

How many chill hours does 77389 get?: 77389 averages 459 chill hours per winter, ranging from 195 to 577 across the last 10 years.
What hardiness zone is 77389?: 77389 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