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Chill hours in R2J

The short answer

R2J averages 879 chill hours per winter (5881,225 across 10 years) in USDA zone 4a.
R2J climate
Average chill hours879 (588–1,225 across 10 winters)
USDA hardiness zone4a (NRCan zone 3b)
Last spring frosttypically May 1 – May 22
First fall frosttypically October 3 – October 16

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 R2J’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 R2J get?
R2J averages 879 chill hours per winter, ranging from 588 to 1225 across the last 10 years.
What hardiness zone is R2J?
R2J is in USDA hardiness zone 4a.

Growing fruit trees in R2J? 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