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Chill hours in G3S

The short answer

G3S averages 895 chill hours per winter (6481,045 across 10 years) in USDA zone 4b.
G3S climate
Average chill hours895 (648–1,045 across 10 winters)
USDA hardiness zone4b (NRCan zone 3b)
Last spring frosttypically May 11 – May 29
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 G3S’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 G3S get?
G3S averages 895 chill hours per winter, ranging from 648 to 1045 across the last 10 years.
What hardiness zone is G3S?
G3S is in USDA hardiness zone 4b.

Growing fruit trees in G3S? 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