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Chill hours in G6G

The short answer

G6G averages 1,100 chill hours per winter (8571,516 across 10 years) in USDA zone 4b.
G6G climate
Average chill hours1,100 (857–1,516 across 10 winters)
USDA hardiness zone4b (NRCan zone 4a)
Last spring frosttypically May 8 – May 23
First fall frosttypically October 10 – October 26

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 G6G’s chill hours and zone:

How many chill hours does G6G get?
G6G averages 1100 chill hours per winter, ranging from 857 to 1516 across the last 10 years.
What hardiness zone is G6G?
G6G 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