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Chill hours in 55019

The short answer

55019 averages 1,209 chill hours per winter (1,0331,477 across 10 years) in USDA zone 4b.
55019 climate
Average chill hours1,209 (1,033–1,477 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 21 – April 28
First fall frosttypically October 17 – 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 55019’s chill hours and zone:

How many chill hours does 55019 get?
55019 averages 1209 chill hours per winter, ranging from 1033 to 1477 across the last 10 years.
What hardiness zone is 55019?
55019 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