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Chill hours in 56117

The short answer

56117 averages 1,159 chill hours per winter (7921,338 across 10 years) in USDA zone 4b.
56117 climate
Average chill hours1,159 (792–1,338 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – April 28
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 56117’s chill hours and zone:

How many chill hours does 56117 get?
56117 averages 1159 chill hours per winter, ranging from 792 to 1338 across the last 10 years.
What hardiness zone is 56117?
56117 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