How many chill hours does 78055 get?

78055 averages 615 chill hours per winter, ranging from 327 to 822 across the last 10 years.

What hardiness zone is 78055?

78055 is in USDA hardiness zone 8b.

Location almanac

The short answer

78055 averages 615 chill hours per winter (327–822 across 10 years) in USDA zone 8b.

78055 climate
Average chill hours	615 (327–822 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically February 7 – March 6
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 78055’s chill hours and zone:

Chill and zone requirements are comfortably met in 78055.

Show 78 more good fit varieties

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

Show 15 more marginal varieties

How many chill hours does 78055 get?: 78055 averages 615 chill hours per winter, ranging from 327 to 822 across the last 10 years.
What hardiness zone is 78055?: 78055 is in USDA hardiness zone 8b.

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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