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Chill hours in 56339

The short answer

56339 averages 1,036 chill hours per winter (6461,338 across 10 years) in USDA zone 4b.
56339 climate
Average chill hours1,036 (646–1,338 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 23 – May 10
First fall frosttypically October 10 – 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 56339’s chill hours and zone:

How many chill hours does 56339 get?
56339 averages 1036 chill hours per winter, ranging from 646 to 1338 across the last 10 years.
What hardiness zone is 56339?
56339 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