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Chill hours in 57552

The short answer

57552 averages 1,302 chill hours per winter (9001,527 across 10 years) in USDA zone 4b.
57552 climate
Average chill hours1,302 (900–1,527 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – May 12
First fall frosttypically October 7 – November 6

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 57552’s chill hours and zone:

How many chill hours does 57552 get?
57552 averages 1302 chill hours per winter, ranging from 900 to 1527 across the last 10 years.
What hardiness zone is 57552?
57552 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