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Chill hours in G8J

The short answer

G8J averages 848 chill hours per winter (6771,086 across 10 years) in USDA zone 4a.
G8J climate
Average chill hours848 (677–1,086 across 10 winters)
USDA hardiness zone4a (NRCan zone 2a)
Last spring frosttypically May 20 – May 31
First fall frosttypically September 24 – October 24

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 G8J’s chill hours and zone:

Marginal (3)

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

Marginal varieties for this location
VarietyFruit
ContenderPeach
CresthavenPeach
ReliancePeach
How many chill hours does G8J get?
G8J averages 848 chill hours per winter, ranging from 677 to 1086 across the last 10 years.
What hardiness zone is G8J?
G8J is in USDA hardiness zone 4a.

Growing fruit trees in G8J? 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