How many chill hours does 77470 get?

77470 averages 409 chill hours per winter, ranging from 155 to 532 across the last 10 years.

What hardiness zone is 77470?

77470 is in USDA hardiness zone 9a.

Location almanac

The short answer

77470 averages 409 chill hours per winter (155–532 across 10 years) in USDA zone 9a.

77470 climate
Average chill hours	409 (155–532 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 8 – February 20
First fall frost	typically November 13 – December 23

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 77470’s chill hours and zone:

Chill and zone requirements are comfortably met in 77470.

Show 34 more good fit varieties

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

How many chill hours does 77470 get?: 77470 averages 409 chill hours per winter, ranging from 155 to 532 across the last 10 years.
What hardiness zone is 77470?: 77470 is in USDA hardiness zone 9a.

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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