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Chill hours in 56358

The short answer

56358 averages 1,103 chill hours per winter (8891,432 across 10 years) in USDA zone 4a.
56358 climate
Average chill hours1,103 (889–1,432 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 25 – May 13
First fall frosttypically October 14 – November 14

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 56358’s chill hours and zone:

How many chill hours does 56358 get?
56358 averages 1103 chill hours per winter, ranging from 889 to 1432 across the last 10 years.
What hardiness zone is 56358?
56358 is in USDA hardiness zone 4a.

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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