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Chill hours in 54437

The short answer

54437 averages 1,239 chill hours per winter (1,0281,520 across 10 years) in USDA zone 4b.
54437 climate
Average chill hours1,239 (1,028–1,520 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 25 – May 13
First fall frosttypically October 12 – 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 54437’s chill hours and zone:

How many chill hours does 54437 get?
54437 averages 1239 chill hours per winter, ranging from 1028 to 1520 across the last 10 years.
What hardiness zone is 54437?
54437 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