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Chill hours in 55367

The short answer

55367 averages 1,133 chill hours per winter (8611,400 across 10 years) in USDA zone 4b.
55367 climate
Average chill hours1,133 (861–1,400 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 21 – May 3
First fall frosttypically October 15 – November 19

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 55367’s chill hours and zone:

How many chill hours does 55367 get?
55367 averages 1133 chill hours per winter, ranging from 861 to 1400 across the last 10 years.
What hardiness zone is 55367?
55367 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