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Chill hours in G8G

The short answer

G8G averages 1,028 chill hours per winter (7611,474 across 10 years) in USDA zone 4b.
G8G climate
Average chill hours1,028 (761–1,474 across 10 winters)
USDA hardiness zone4b (NRCan zone 3a)
Last spring frosttypically May 2 – 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 G8G’s chill hours and zone:

How many chill hours does G8G get?
G8G averages 1028 chill hours per winter, ranging from 761 to 1474 across the last 10 years.
What hardiness zone is G8G?
G8G 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