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Chill hours in 56097

The short answer

56097 averages 1,195 chill hours per winter (1,0041,419 across 10 years) in USDA zone 4b.
56097 climate
Average chill hours1,195 (1,004–1,419 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – May 10
First fall frosttypically October 12 – October 28

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 56097’s chill hours and zone:

How many chill hours does 56097 get?
56097 averages 1195 chill hours per winter, ranging from 1004 to 1419 across the last 10 years.
What hardiness zone is 56097?
56097 is in USDA hardiness zone 4b.

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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