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Chill hours in 54611

The short answer

54611 averages 1,257 chill hours per winter (1,0531,553 across 10 years) in USDA zone 4b.
54611 climate
Average chill hours1,257 (1,053–1,553 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 25 – May 13
First fall frosttypically October 13 – November 14

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 54611’s chill hours and zone:

How many chill hours does 54611 get?
54611 averages 1257 chill hours per winter, ranging from 1053 to 1553 across the last 10 years.
What hardiness zone is 54611?
54611 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