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Chill hours in 56057

The short answer

56057 averages 1,164 chill hours per winter (9051,429 across 10 years) in USDA zone 4b.
56057 climate
Average chill hours1,164 (905–1,429 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – April 28
First fall frosttypically October 15 – November 19

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 56057’s chill hours and zone:

How many chill hours does 56057 get?
56057 averages 1164 chill hours per winter, ranging from 905 to 1429 across the last 10 years.
What hardiness zone is 56057?
56057 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