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Chill hours in J8G

The short answer

J8G averages 1,166 chill hours per winter (9501,499 across 10 years) in USDA zone 4b.
J8G climate
Average chill hours1,166 (950–1,499 across 10 winters)
USDA hardiness zone4b (NRCan zone 4b)
Last spring frosttypically April 30 – May 18
First fall frosttypically October 18 – November 2

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 J8G’s chill hours and zone:

How many chill hours does J8G get?
J8G averages 1166 chill hours per winter, ranging from 950 to 1499 across the last 10 years.
What hardiness zone is J8G?
J8G 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