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Chill hours in J9T

The short answer

J9T averages 971 chill hours per winter (7311,210 across 10 years) in USDA zone 4a.
J9T climate
Average chill hours971 (731–1,210 across 10 winters)
USDA hardiness zone4a (NRCan zone 2a)
Last spring frosttypically May 18 – 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 J9T’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 J9T get?
J9T averages 971 chill hours per winter, ranging from 731 to 1210 across the last 10 years.
What hardiness zone is J9T?
J9T is in USDA hardiness zone 4a.

Growing fruit trees in J9T? 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