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Chill hours in 58029

The short answer

58029 averages 1,024 chill hours per winter (5931,311 across 10 years) in USDA zone 4a.
58029 climate
Average chill hours1,024 (593–1,311 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 29 – May 15
First fall frosttypically October 7 – October 21

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 58029’s chill hours and zone:

How many chill hours does 58029 get?
58029 averages 1024 chill hours per winter, ranging from 593 to 1311 across the last 10 years.
What hardiness zone is 58029?
58029 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