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Chill hours in 56685

The short answer

56685 averages 945 chill hours per winter (7151,221 across 10 years) in USDA zone 3b.
56685 climate
Average chill hours945 (715–1,221 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically April 29 – May 15
First fall frosttypically October 14 – 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 56685’s chill hours and zone:

How many chill hours does 56685 get?
56685 averages 945 chill hours per winter, ranging from 715 to 1221 across the last 10 years.
What hardiness zone is 56685?
56685 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