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Chill hours in 55932

The short answer

55932 averages 1,242 chill hours per winter (1,0651,484 across 10 years) in USDA zone 4b.
55932 climate
Average chill hours1,242 (1,065–1,484 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 26 – May 13
First fall frosttypically October 12 – 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 55932’s chill hours and zone:

How many chill hours does 55932 get?
55932 averages 1242 chill hours per winter, ranging from 1065 to 1484 across the last 10 years.
What hardiness zone is 55932?
55932 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