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Chill hours in 56553

The short answer

56553 averages 1,072 chill hours per winter (7451,353 across 10 years) in USDA zone 4a.
56553 climate
Average chill hours1,072 (745–1,353 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 23 – May 11
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 56553’s chill hours and zone:

How many chill hours does 56553 get?
56553 averages 1072 chill hours per winter, ranging from 745 to 1353 across the last 10 years.
What hardiness zone is 56553?
56553 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