How many chill hours does 77454 get?

77454 averages 399 chill hours per winter, ranging from 155 to 518 across the last 10 years.

What hardiness zone is 77454?

77454 is in USDA hardiness zone 9a.

Location almanac

The short answer

77454 averages 399 chill hours per winter (155–518 across 10 years) in USDA zone 9a.

77454 climate
Average chill hours	399 (155–518 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 8 – March 5
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 77454’s chill hours and zone:

Chill and zone requirements are comfortably met in 77454.

Show 26 more good fit varieties

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

How many chill hours does 77454 get?: 77454 averages 399 chill hours per winter, ranging from 155 to 518 across the last 10 years.
What hardiness zone is 77454?: 77454 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