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Chill hours in 56260

The short answer

56260 averages 1,103 chill hours per winter (7381,320 across 10 years) in USDA zone 4b.
56260 climate
Average chill hours1,103 (738–1,320 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – May 11
First fall frosttypically October 11 – 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 56260’s chill hours and zone:

How many chill hours does 56260 get?
56260 averages 1103 chill hours per winter, ranging from 738 to 1320 across the last 10 years.
What hardiness zone is 56260?
56260 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