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Chill hours in 55030

The short answer

55030 averages 1,127 chill hours per winter (9361,460 across 10 years) in USDA zone 4a.
55030 climate
Average chill hours1,127 (936–1,460 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 25 – 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 55030’s chill hours and zone:

How many chill hours does 55030 get?
55030 averages 1127 chill hours per winter, ranging from 936 to 1460 across the last 10 years.
What hardiness zone is 55030?
55030 is in USDA hardiness zone 4a.

Growing fruit trees in 55030? 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