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Chill hours in 54104

The short answer

54104 averages 1,213 chill hours per winter (8771,597 across 10 years) in USDA zone 4b.
54104 climate
Average chill hours1,213 (877–1,597 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 27 – May 14
First fall frosttypically October 14 – 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 54104’s chill hours and zone:

How many chill hours does 54104 get?
54104 averages 1213 chill hours per winter, ranging from 877 to 1597 across the last 10 years.
What hardiness zone is 54104?
54104 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