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Chill hours in 58051

The short answer

58051 averages 1,065 chill hours per winter (6881,366 across 10 years) in USDA zone 4a.
58051 climate
Average chill hours1,065 (688–1,366 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 23 – May 10
First fall frosttypically October 7 – 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 58051’s chill hours and zone:

How many chill hours does 58051 get?
58051 averages 1065 chill hours per winter, ranging from 688 to 1366 across the last 10 years.
What hardiness zone is 58051?
58051 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