How many chill hours does 77538 get?

77538 averages 425 chill hours per winter, ranging from 187 to 533 across the last 10 years.

What hardiness zone is 77538?

77538 is in USDA hardiness zone 9a.

Location almanac

The short answer

77538 averages 425 chill hours per winter (187–533 across 10 years) in USDA zone 9a.

77538 climate
Average chill hours	425 (187–533 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 18 – February 27
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 77538’s chill hours and zone:

Chill and zone requirements are comfortably met in 77538.

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 77538 get?: 77538 averages 425 chill hours per winter, ranging from 187 to 533 across the last 10 years.
What hardiness zone is 77538?: 77538 is in USDA hardiness zone 9a.

Growing fruit trees in 77538? Get a care calendar anchored to this exact climate, with email reminders.

[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