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Chill hours in 56760

The short answer

56760 averages 937 chill hours per winter (6531,224 across 10 years) in USDA zone 3b.
56760 climate
Average chill hours937 (653–1,224 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically May 1 – May 19
First fall frosttypically October 3 – October 21

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 56760’s chill hours and zone:

How many chill hours does 56760 get?
56760 averages 937 chill hours per winter, ranging from 653 to 1224 across the last 10 years.
What hardiness zone is 56760?
56760 is in USDA hardiness zone 3b.

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Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026