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Chill hours in 56729

The short answer

56729 averages 913 chill hours per winter (5981,237 across 10 years) in USDA zone 3b.
56729 climate
Average chill hours913 (598–1,237 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically May 1 – May 19
First fall frosttypically October 3 – October 16

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 56729’s chill hours and zone:

How many chill hours does 56729 get?
56729 averages 913 chill hours per winter, ranging from 598 to 1237 across the last 10 years.
What hardiness zone is 56729?
56729 is in USDA hardiness zone 3b.

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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