How many chill hours does 17921 get?

17921 averages 1627 chill hours per winter, ranging from 1314 to 1945 across the last 10 years.

What hardiness zone is 17921?

17921 is in USDA hardiness zone 6b.

Location almanac

The short answer

17921 averages 1,627 chill hours per winter (1,314–1,945 across 10 years) in USDA zone 6b.

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 17921’s chill hours and zone:

Chill and zone requirements are comfortably met in 17921.

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How many chill hours does 17921 get?: 17921 averages 1627 chill hours per winter, ranging from 1314 to 1945 across the last 10 years.
What hardiness zone is 17921?: 17921 is in USDA hardiness zone 6b.

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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