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Chill hours in 56659

The short answer

56659 averages 979 chill hours per winter (7011,255 across 10 years) in USDA zone 3b.
56659 climate
Average chill hours979 (701–1,255 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically April 26 – May 13
First fall frosttypically October 16 – November 7

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 56659’s chill hours and zone:

How many chill hours does 56659 get?
56659 averages 979 chill hours per winter, ranging from 701 to 1255 across the last 10 years.
What hardiness zone is 56659?
56659 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