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Chill hours in 55710

The short answer

55710 averages 968 chill hours per winter (6541,311 across 10 years) in USDA zone 3b.
55710 climate
Average chill hours968 (654–1,311 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically April 28 – May 16
First fall frosttypically October 12 – November 2

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 55710’s chill hours and zone:

How many chill hours does 55710 get?
55710 averages 968 chill hours per winter, ranging from 654 to 1311 across the last 10 years.
What hardiness zone is 55710?
55710 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