How many chill hours does 13639 get?

13639 averages 1380 chill hours per winter, ranging from 1123 to 1686 across the last 10 years.

What hardiness zone is 13639?

13639 is in USDA hardiness zone 4b.

Location almanac

The short answer

13639 averages 1,380 chill hours per winter (1,123–1,686 across 10 years) in USDA zone 4b.

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 13639’s chill hours and zone:

Chill and zone requirements are comfortably met in 13639.

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How many chill hours does 13639 get?: 13639 averages 1380 chill hours per winter, ranging from 1123 to 1686 across the last 10 years.
What hardiness zone is 13639?: 13639 is in USDA hardiness zone 4b.

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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