How many chill hours does 77837 get?

77837 averages 594 chill hours per winter, ranging from 265 to 825 across the last 10 years.

What hardiness zone is 77837?

77837 is in USDA hardiness zone 9a.

Location almanac

The short answer

77837 averages 594 chill hours per winter (265–825 across 10 years) in USDA zone 9a.

77837 climate
Average chill hours	594 (265–825 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 28 – March 6
First fall frost	typically November 14 – December 25

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 77837’s chill hours and zone:

Chill and zone requirements are comfortably met in 77837.

Show 48 more good fit varieties

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

Show 7 more marginal varieties

How many chill hours does 77837 get?: 77837 averages 594 chill hours per winter, ranging from 265 to 825 across the last 10 years.
What hardiness zone is 77837?: 77837 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