How many chill hours does 78665 get?

78665 averages 572 chill hours per winter, ranging from 279 to 805 across the last 10 years.

What hardiness zone is 78665?

78665 is in USDA hardiness zone 9a.

Location almanac

The short answer

78665 averages 572 chill hours per winter (279–805 across 10 years) in USDA zone 9a.

78665 climate
Average chill hours	572 (279–805 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 23 – March 6
First fall frost	typically November 1 – December 18

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 78665’s chill hours and zone:

Chill and zone requirements are comfortably met in 78665.

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 78665 get?: 78665 averages 572 chill hours per winter, ranging from 279 to 805 across the last 10 years.
What hardiness zone is 78665?: 78665 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