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Chill hours in 55079

The short answer

55079 averages 1,154 chill hours per winter (9721,445 across 10 years) in USDA zone 4b.
55079 climate
Average chill hours1,154 (972–1,445 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 23 – May 11
First fall frosttypically October 14 – 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 55079’s chill hours and zone:

How many chill hours does 55079 get?
55079 averages 1154 chill hours per winter, ranging from 972 to 1445 across the last 10 years.
What hardiness zone is 55079?
55079 is in USDA hardiness zone 4b.

Growing fruit trees in 55079? 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