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Chill hours in 55706

The short answer

55706 averages 972 chill hours per winter (6791,317 across 10 years) in USDA zone 3b.
55706 climate
Average chill hours972 (679–1,317 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically May 3 – May 16
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 55706’s chill hours and zone:

How many chill hours does 55706 get?
55706 averages 972 chill hours per winter, ranging from 679 to 1317 across the last 10 years.
What hardiness zone is 55706?
55706 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