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Chill hours in K1J

The short answer

K1J averages 1,309 chill hours per winter (1,0471,658 across 10 years) in USDA zone 4b.
K1J climate
Average chill hours1,309 (1,047–1,658 across 10 winters)
USDA hardiness zone4b (NRCan zone 5a)
Last spring frosttypically April 25 – May 9
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 K1J’s chill hours and zone:

How many chill hours does K1J get?
K1J averages 1309 chill hours per winter, ranging from 1047 to 1658 across the last 10 years.
What hardiness zone is K1J?
K1J 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