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Chill hours in G8M

The short answer

G8M averages 957 chill hours per winter (7611,278 across 10 years) in USDA zone 4a.
G8M climate
Average chill hours957 (761–1,278 across 10 winters)
USDA hardiness zone4a (NRCan zone 2b)
Last spring frosttypically May 11 – May 28
First fall frosttypically September 24 – October 27

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 G8M’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 G8M get?
G8M averages 957 chill hours per winter, ranging from 761 to 1278 across the last 10 years.
What hardiness zone is G8M?
G8M is in USDA hardiness zone 4a.

Growing fruit trees in G8M? 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