How many chill hours does 39478 get?

39478 averages 610 chill hours per winter, ranging from 366 to 773 across the last 10 years.

What hardiness zone is 39478?

39478 is in USDA hardiness zone 9a.

Location almanac

The short answer

39478 averages 610 chill hours per winter (366–773 across 10 years) in USDA zone 9a.

39478 climate
Average chill hours	610 (366–773 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 30 – March 13
First fall frost	typically November 15 – December 9

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 39478’s chill hours and zone:

Chill and zone requirements are comfortably met in 39478.

Show 54 more good fit varieties

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

How many chill hours does 39478 get?: 39478 averages 610 chill hours per winter, ranging from 366 to 773 across the last 10 years.
What hardiness zone is 39478?: 39478 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