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Chill hours in J8E

The short answer

J8E averages 1,131 chill hours per winter (8681,568 across 10 years) in USDA zone 4b.
J8E climate
Average chill hours1,131 (868–1,568 across 10 winters)
USDA hardiness zone4b (NRCan zone 4a)
Last spring frosttypically April 27 – May 17
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 J8E’s chill hours and zone:

How many chill hours does J8E get?
J8E averages 1131 chill hours per winter, ranging from 868 to 1568 across the last 10 years.
What hardiness zone is J8E?
J8E 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