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Chill hours in 55069

The short answer

55069 averages 1,140 chill hours per winter (9621,439 across 10 years) in USDA zone 4b.
55069 climate
Average chill hours1,140 (962–1,439 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 25 – May 4
First fall frosttypically October 12 – 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 55069’s chill hours and zone:

How many chill hours does 55069 get?
55069 averages 1140 chill hours per winter, ranging from 962 to 1439 across the last 10 years.
What hardiness zone is 55069?
55069 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