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Chill hours in 54546

The short answer

54546 averages 1,087 chill hours per winter (8121,538 across 10 years) in USDA zone 4a.
54546 climate
Average chill hours1,087 (812–1,538 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically May 3 – May 19
First fall frosttypically October 5 – October 28

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 54546’s chill hours and zone:

How many chill hours does 54546 get?
54546 averages 1087 chill hours per winter, ranging from 812 to 1538 across the last 10 years.
What hardiness zone is 54546?
54546 is in USDA hardiness zone 4a.

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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