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Chill hours in 56387

The short answer

56387 averages 1,119 chill hours per winter (8281,445 across 10 years) in USDA zone 4b.
56387 climate
Average chill hours1,119 (828–1,445 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 26 – May 11
First fall frosttypically October 5 – 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 56387’s chill hours and zone:

How many chill hours does 56387 get?
56387 averages 1119 chill hours per winter, ranging from 828 to 1445 across the last 10 years.
What hardiness zone is 56387?
56387 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