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Chill hours in 55792

The short answer

55792 averages 962 chill hours per winter (6801,307 across 10 years) in USDA zone 3b.
55792 climate
Average chill hours962 (680–1,307 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically May 3 – May 16
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 55792’s chill hours and zone:

How many chill hours does 55792 get?
55792 averages 962 chill hours per winter, ranging from 680 to 1307 across the last 10 years.
What hardiness zone is 55792?
55792 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