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Chill hours in 56634

The short answer

56634 averages 956 chill hours per winter (7011,206 across 10 years) in USDA zone 3b.
56634 climate
Average chill hours956 (701–1,206 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically April 29 – May 15
First fall frosttypically October 7 – 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 56634’s chill hours and zone:

How many chill hours does 56634 get?
56634 averages 956 chill hours per winter, ranging from 701 to 1206 across the last 10 years.
What hardiness zone is 56634?
56634 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