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Chill hours in 56568

The short answer

56568 averages 1,005 chill hours per winter (6511,283 across 10 years) in USDA zone 4a.
56568 climate
Average chill hours1,005 (651–1,283 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 29 – May 15
First fall frosttypically October 5 – 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 56568’s chill hours and zone:

How many chill hours does 56568 get?
56568 averages 1005 chill hours per winter, ranging from 651 to 1283 across the last 10 years.
What hardiness zone is 56568?
56568 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