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Chill hours in 56144

The short answer

56144 averages 1,150 chill hours per winter (7491,279 across 10 years) in USDA zone 4b.
56144 climate
Average chill hours1,150 (749–1,279 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – May 2
First fall frosttypically October 8 – 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 56144’s chill hours and zone:

How many chill hours does 56144 get?
56144 averages 1150 chill hours per winter, ranging from 749 to 1279 across the last 10 years.
What hardiness zone is 56144?
56144 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