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Chill hours in 56270

The short answer

56270 averages 1,127 chill hours per winter (8061,336 across 10 years) in USDA zone 4b.
56270 climate
Average chill hours1,127 (806–1,336 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – April 28
First fall frosttypically October 12 – November 7

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 56270’s chill hours and zone:

How many chill hours does 56270 get?
56270 averages 1127 chill hours per winter, ranging from 806 to 1336 across the last 10 years.
What hardiness zone is 56270?
56270 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