How many chill hours does 77301 get?

77301 averages 492 chill hours per winter, ranging from 193 to 604 across the last 10 years.

What hardiness zone is 77301?

77301 is in USDA hardiness zone 9a.

Location almanac

The short answer

77301 averages 492 chill hours per winter (193–604 across 10 years) in USDA zone 9a.

77301 climate
Average chill hours	492 (193–604 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 18 – February 27
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 77301’s chill hours and zone:

Chill and zone requirements are comfortably met in 77301.

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 77301 get?: 77301 averages 492 chill hours per winter, ranging from 193 to 604 across the last 10 years.
What hardiness zone is 77301?: 77301 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