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Chill hours in 58105

The short answer

58105 averages 1,035 chill hours per winter (6691,305 across 10 years) in USDA zone 4a.
58105 climate
Average chill hours1,035 (669–1,305 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 28 – May 13
First fall frosttypically October 5 – October 17

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 58105’s chill hours and zone:

How many chill hours does 58105 get?
58105 averages 1035 chill hours per winter, ranging from 669 to 1305 across the last 10 years.
What hardiness zone is 58105?
58105 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