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Chill hours in 57266

The short answer

57266 averages 1,068 chill hours per winter (6171,340 across 10 years) in USDA zone 4a.
57266 climate
Average chill hours1,068 (617–1,340 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 25 – May 13
First fall frosttypically October 7 – 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 57266’s chill hours and zone:

How many chill hours does 57266 get?
57266 averages 1068 chill hours per winter, ranging from 617 to 1340 across the last 10 years.
What hardiness zone is 57266?
57266 is in USDA hardiness zone 4a.

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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