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Chill hours in G7N

The short answer

G7N averages 906 chill hours per winter (7091,033 across 10 years) in USDA zone 4b.
G7N climate
Average chill hours906 (709–1,033 across 10 winters)
USDA hardiness zone4b (NRCan zone 2b)
Last spring frosttypically May 20 – May 31
First fall frosttypically September 24 – October 23

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 G7N’s chill hours and zone:

Marginal (1)

Possible in a good year or a favorable microclimate — click through for the caveats.

Marginal varieties for this location
VarietyFruit
ReliancePeach
How many chill hours does G7N get?
G7N averages 906 chill hours per winter, ranging from 709 to 1033 across the last 10 years.
What hardiness zone is G7N?
G7N is in USDA hardiness zone 4b.

Growing fruit trees in G7N? Get a care calendar anchored to this exact climate, with email reminders.

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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