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Chill hours in 56210

The short answer

56210 averages 1,109 chill hours per winter (6641,385 across 10 years) in USDA zone 4b.
56210 climate
Average chill hours1,109 (664–1,385 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 21 – May 7
First fall frosttypically October 14 – November 13

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 56210’s chill hours and zone:

How many chill hours does 56210 get?
56210 averages 1109 chill hours per winter, ranging from 664 to 1385 across the last 10 years.
What hardiness zone is 56210?
56210 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