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Chill hours in 56667

The short answer

56667 averages 961 chill hours per winter (7001,231 across 10 years) in USDA zone 3b.
56667 climate
Average chill hours961 (700–1,231 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically April 25 – May 13
First fall frosttypically October 12 – October 27

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 56667’s chill hours and zone:

How many chill hours does 56667 get?
56667 averages 961 chill hours per winter, ranging from 700 to 1231 across the last 10 years.
What hardiness zone is 56667?
56667 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