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Chill hours in 56683

The short answer

56683 averages 969 chill hours per winter (7261,229 across 10 years) in USDA zone 3b.
56683 climate
Average chill hours969 (726–1,229 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically April 26 – May 13
First fall frosttypically October 12 – October 27

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 56683’s chill hours and zone:

How many chill hours does 56683 get?
56683 averages 969 chill hours per winter, ranging from 726 to 1229 across the last 10 years.
What hardiness zone is 56683?
56683 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