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Chill hours in 59015

The short answer

59015 averages 1,534 chill hours per winter (1,1181,770 across 10 years) in USDA zone 4b.
59015 climate
Average chill hours1,534 (1,118–1,770 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 24 – May 22
First fall frosttypically October 4 – October 26

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 59015’s chill hours and zone:

How many chill hours does 59015 get?
59015 averages 1534 chill hours per winter, ranging from 1118 to 1770 across the last 10 years.
What hardiness zone is 59015?
59015 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