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Chill hours in 58573

The short answer

58573 averages 1,099 chill hours per winter (5071,391 across 10 years) in USDA zone 4a.
58573 climate
Average chill hours1,099 (507–1,391 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 22 – May 19
First fall frosttypically October 7 – October 29

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 58573’s chill hours and zone:

How many chill hours does 58573 get?
58573 averages 1099 chill hours per winter, ranging from 507 to 1391 across the last 10 years.
What hardiness zone is 58573?
58573 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