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Chill hours in G8T

The short answer

G8T averages 1,183 chill hours per winter (9601,657 across 10 years) in USDA zone 4b.
G8T climate
Average chill hours1,183 (960–1,657 across 10 winters)
USDA hardiness zone4b (NRCan zone 5a)
Last spring frosttypically April 28 – May 15
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 G8T’s chill hours and zone:

How many chill hours does G8T get?
G8T averages 1183 chill hours per winter, ranging from 960 to 1657 across the last 10 years.
What hardiness zone is G8T?
G8T 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