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Chill hours in 58013

The short answer

58013 averages 1,093 chill hours per winter (6431,389 across 10 years) in USDA zone 4b.
58013 climate
Average chill hours1,093 (643–1,389 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 23 – May 11
First fall frosttypically October 7 – November 7

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 58013’s chill hours and zone:

How many chill hours does 58013 get?
58013 averages 1093 chill hours per winter, ranging from 643 to 1389 across the last 10 years.
What hardiness zone is 58013?
58013 is in USDA hardiness zone 4b.

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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