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Chill hours in 56371

The short answer

56371 averages 1,098 chill hours per winter (7941,428 across 10 years) in USDA zone 4b.
56371 climate
Average chill hours1,098 (794–1,428 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – May 11
First fall frosttypically October 11 – 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 56371’s chill hours and zone:

How many chill hours does 56371 get?
56371 averages 1098 chill hours per winter, ranging from 794 to 1428 across the last 10 years.
What hardiness zone is 56371?
56371 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