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Chill hours in 57071

The short answer

57071 averages 1,144 chill hours per winter (7141,302 across 10 years) in USDA zone 4b.
57071 climate
Average chill hours1,144 (714–1,302 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – May 10
First fall frosttypically October 11 – November 7

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 57071’s chill hours and zone:

How many chill hours does 57071 get?
57071 averages 1144 chill hours per winter, ranging from 714 to 1302 across the last 10 years.
What hardiness zone is 57071?
57071 is in USDA hardiness zone 4b.

Growing fruit trees in 57071? 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