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Chill hours in K8H

The short answer

K8H averages 1,249 chill hours per winter (9811,606 across 10 years) in USDA zone 4b.
K8H climate
Average chill hours1,249 (981–1,606 across 10 winters)
USDA hardiness zone4b (NRCan zone 4b)
Last spring frosttypically April 27 – May 15
First fall frosttypically October 18 – November 4

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 K8H’s chill hours and zone:

How many chill hours does K8H get?
K8H averages 1249 chill hours per winter, ranging from 981 to 1606 across the last 10 years.
What hardiness zone is K8H?
K8H 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