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Chill hours in K1E

The short answer

K1E averages 1,295 chill hours per winter (1,0371,660 across 10 years) in USDA zone 4b.
K1E climate
Average chill hours1,295 (1,037–1,660 across 10 winters)
USDA hardiness zone4b (NRCan zone 5a)
Last spring frosttypically April 25 – May 14
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 K1E’s chill hours and zone:

How many chill hours does K1E get?
K1E averages 1295 chill hours per winter, ranging from 1037 to 1660 across the last 10 years.
What hardiness zone is K1E?
K1E 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