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Chill hours in K8A

The short answer

K8A averages 1,250 chill hours per winter (9971,608 across 10 years) in USDA zone 4b.
K8A climate
Average chill hours1,250 (997–1,608 across 10 winters)
USDA hardiness zone4b (NRCan zone 4b)
Last spring frosttypically April 27 – May 15
First fall frosttypically October 18 – November 3

Computed from 10 winters of ERA5 hourly temperature (Open-Meteo, 2015–2025); zones from USDA PHZM 2023 / NRCan 1981–2010. Data updated July 3, 2026. See methodology.

Every variety in our database, checked against K8A’s chill hours and zone:

How many chill hours does K8A get?
K8A averages 1250 chill hours per winter, ranging from 997 to 1608 across the last 10 years.
What hardiness zone is K8A?
K8A 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] Natural Resources Canada. Plant Hardiness Zones of Canada — accessed July 2026