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Chill hours in J0K

The short answer

J0K averages 1,020 chill hours per winter (7111,438 across 10 years) in USDA zone 4b.
J0K climate
Average chill hours1,020 (711–1,438 across 10 winters)
USDA hardiness zone4b (NRCan zone 3a)
Last spring frosttypically May 7 – May 23
First fall frosttypically October 10 – October 29

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 J0K’s chill hours and zone:

How many chill hours does J0K get?
J0K averages 1020 chill hours per winter, ranging from 711 to 1438 across the last 10 years.
What hardiness zone is J0K?
J0K 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