How many chill hours does 12939 get?

12939 averages 1253 chill hours per winter, ranging from 1008 to 1640 across the last 10 years.

What hardiness zone is 12939?

12939 is in USDA hardiness zone 4a.

Location almanac

The short answer

12939 averages 1,253 chill hours per winter (1,008–1,640 across 10 years) in USDA zone 4a.

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 12939’s chill hours and zone:

Chill and zone requirements are comfortably met in 12939.

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How many chill hours does 12939 get?: 12939 averages 1253 chill hours per winter, ranging from 1008 to 1640 across the last 10 years.
What hardiness zone is 12939?: 12939 is in USDA hardiness zone 4a.

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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