How many chill hours does 77807 get?

77807 averages 549 chill hours per winter, ranging from 233 to 740 across the last 10 years.

What hardiness zone is 77807?

77807 is in USDA hardiness zone 9a.

Location almanac

The short answer

77807 averages 549 chill hours per winter (233–740 across 10 years) in USDA zone 9a.

77807 climate
Average chill hours	549 (233–740 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 20 – March 6
First fall frost	typically November 1 – December 19

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 77807’s chill hours and zone:

Chill and zone requirements are comfortably met in 77807.

Show 48 more good fit varieties

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

How many chill hours does 77807 get?: 77807 averages 549 chill hours per winter, ranging from 233 to 740 across the last 10 years.
What hardiness zone is 77807?: 77807 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