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Chill hours in 56345

The short answer

56345 averages 1,081 chill hours per winter (8471,437 across 10 years) in USDA zone 4a.
56345 climate
Average chill hours1,081 (847–1,437 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 25 – May 11
First fall frosttypically October 5 – October 28

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 56345’s chill hours and zone:

How many chill hours does 56345 get?
56345 averages 1081 chill hours per winter, ranging from 847 to 1437 across the last 10 years.
What hardiness zone is 56345?
56345 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