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Chill hours in 54730

The short answer

54730 averages 1,191 chill hours per winter (9761,512 across 10 years) in USDA zone 4b.
54730 climate
Average chill hours1,191 (976–1,512 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 54730’s chill hours and zone:

How many chill hours does 54730 get?
54730 averages 1191 chill hours per winter, ranging from 976 to 1512 across the last 10 years.
What hardiness zone is 54730?
54730 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