How many chill hours does 77615 get?

77615 averages 470 chill hours per winter, ranging from 196 to 597 across the last 10 years.

What hardiness zone is 77615?

77615 is in USDA hardiness zone 9a.

Location almanac

The short answer

77615 averages 470 chill hours per winter (196–597 across 10 years) in USDA zone 9a.

77615 climate
Average chill hours	470 (196–597 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 8 – 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 77615’s chill hours and zone:

Chill and zone requirements are comfortably met in 77615.

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 77615 get?: 77615 averages 470 chill hours per winter, ranging from 196 to 597 across the last 10 years.
What hardiness zone is 77615?: 77615 is in USDA hardiness zone 9a.

Growing fruit trees in 77615? 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