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Chill hours in 54612

The short answer

54612 averages 1,306 chill hours per winter (1,1221,585 across 10 years) in USDA zone 4b.
54612 climate
Average chill hours1,306 (1,122–1,585 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 23 – May 11
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 54612’s chill hours and zone:

How many chill hours does 54612 get?
54612 averages 1306 chill hours per winter, ranging from 1122 to 1585 across the last 10 years.
What hardiness zone is 54612?
54612 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