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Chill hours in 56278

The short answer

56278 averages 1,110 chill hours per winter (6831,354 across 10 years) in USDA zone 4b.
56278 climate
Average chill hours1,110 (683–1,354 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 21 – May 7
First fall frosttypically October 14 – November 13

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 56278’s chill hours and zone:

How many chill hours does 56278 get?
56278 averages 1110 chill hours per winter, ranging from 683 to 1354 across the last 10 years.
What hardiness zone is 56278?
56278 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