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Chill hours in 56535

The short answer

56535 averages 955 chill hours per winter (6621,212 across 10 years) in USDA zone 3b.
56535 climate
Average chill hours955 (662–1,212 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically April 25 – May 19
First fall frosttypically October 10 – October 21

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 56535’s chill hours and zone:

How many chill hours does 56535 get?
56535 averages 955 chill hours per winter, ranging from 662 to 1212 across the last 10 years.
What hardiness zone is 56535?
56535 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