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Chill hours in 55072

The short answer

55072 averages 1,087 chill hours per winter (8611,446 across 10 years) in USDA zone 4a.
55072 climate
Average chill hours1,087 (861–1,446 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 27 – May 13
First fall frosttypically October 11 – 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 55072’s chill hours and zone:

How many chill hours does 55072 get?
55072 averages 1087 chill hours per winter, ranging from 861 to 1446 across the last 10 years.
What hardiness zone is 55072?
55072 is in USDA hardiness zone 4a.

Growing fruit trees in 55072? Get a care calendar anchored to this exact climate, with email reminders.

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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