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Chill hours in 56325

The short answer

56325 averages 1,069 chill hours per winter (7361,421 across 10 years) in USDA zone 4b.
56325 climate
Average chill hours1,069 (736–1,421 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – May 11
First fall frosttypically October 5 – November 13

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 56325’s chill hours and zone:

How many chill hours does 56325 get?
56325 averages 1069 chill hours per winter, ranging from 736 to 1421 across the last 10 years.
What hardiness zone is 56325?
56325 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