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Chill hours in 54560

The short answer

54560 averages 1,060 chill hours per winter (7571,475 across 10 years) in USDA zone 4b.
54560 climate
Average chill hours1,060 (757–1,475 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 29 – May 16
First fall frosttypically October 12 – November 2

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 54560’s chill hours and zone:

How many chill hours does 54560 get?
54560 averages 1060 chill hours per winter, ranging from 757 to 1475 across the last 10 years.
What hardiness zone is 54560?
54560 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