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Chill hours in 55712

The short answer

55712 averages 1,072 chill hours per winter (8261,443 across 10 years) in USDA zone 4a.
55712 climate
Average chill hours1,072 (826–1,443 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 27 – May 13
First fall frosttypically October 10 – October 28

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 55712’s chill hours and zone:

How many chill hours does 55712 get?
55712 averages 1072 chill hours per winter, ranging from 826 to 1443 across the last 10 years.
What hardiness zone is 55712?
55712 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