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Chill hours in 55056

The short answer

55056 averages 1,159 chill hours per winter (9791,459 across 10 years) in USDA zone 4b.
55056 climate
Average chill hours1,159 (979–1,459 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 23 – May 3
First fall frosttypically October 14 – 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 55056’s chill hours and zone:

How many chill hours does 55056 get?
55056 averages 1159 chill hours per winter, ranging from 979 to 1459 across the last 10 years.
What hardiness zone is 55056?
55056 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