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Chill hours in 54733

The short answer

54733 averages 1,160 chill hours per winter (9531,478 across 10 years) in USDA zone 4b.
54733 climate
Average chill hours1,160 (953–1,478 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 25 – May 13
First fall frosttypically October 5 – 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 54733’s chill hours and zone:

How many chill hours does 54733 get?
54733 averages 1160 chill hours per winter, ranging from 953 to 1478 across the last 10 years.
What hardiness zone is 54733?
54733 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