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Chill hours in 54151

The short answer

54151 averages 1,205 chill hours per winter (8661,569 across 10 years) in USDA zone 4b.
54151 climate
Average chill hours1,205 (866–1,569 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 28 – May 14
First fall frosttypically October 13 – 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 54151’s chill hours and zone:

How many chill hours does 54151 get?
54151 averages 1205 chill hours per winter, ranging from 866 to 1569 across the last 10 years.
What hardiness zone is 54151?
54151 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