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Chill hours in 57479

The short answer

57479 averages 1,099 chill hours per winter (6111,326 across 10 years) in USDA zone 4a.
57479 climate
Average chill hours1,099 (611–1,326 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 23 – May 10
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 57479’s chill hours and zone:

How many chill hours does 57479 get?
57479 averages 1099 chill hours per winter, ranging from 611 to 1326 across the last 10 years.
What hardiness zone is 57479?
57479 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