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Chill hours in 56241

The short answer

56241 averages 1,131 chill hours per winter (7831,326 across 10 years) in USDA zone 4b.
56241 climate
Average chill hours1,131 (783–1,326 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 21 – April 28
First fall frosttypically October 12 – 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 56241’s chill hours and zone:

How many chill hours does 56241 get?
56241 averages 1131 chill hours per winter, ranging from 783 to 1326 across the last 10 years.
What hardiness zone is 56241?
56241 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