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Chill hours in 55089

The short answer

55089 averages 1,234 chill hours per winter (1,0381,501 across 10 years) in USDA zone 4b.
55089 climate
Average chill hours1,234 (1,038–1,501 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 25 – May 13
First fall frosttypically October 15 – 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 55089’s chill hours and zone:

How many chill hours does 55089 get?
55089 averages 1234 chill hours per winter, ranging from 1038 to 1501 across the last 10 years.
What hardiness zone is 55089?
55089 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