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Chill hours in 56474

The short answer

56474 averages 1,014 chill hours per winter (7331,357 across 10 years) in USDA zone 4a.
56474 climate
Average chill hours1,014 (733–1,357 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 26 – May 13
First fall frosttypically October 5 – November 13

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 56474’s chill hours and zone:

How many chill hours does 56474 get?
56474 averages 1014 chill hours per winter, ranging from 733 to 1357 across the last 10 years.
What hardiness zone is 56474?
56474 is in USDA hardiness zone 4a.

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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