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Chill hours in T1J

The short answer

T1J averages 1,631 chill hours per winter (1,3491,903 across 10 years) in USDA zone 4a.
T1J climate
Average chill hours1,631 (1,349–1,903 across 10 winters)
USDA hardiness zone4a (NRCan zone 4b)
Last spring frosttypically April 23 – May 21
First fall frosttypically September 24 – 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 T1J’s chill hours and zone:

How many chill hours does T1J get?
T1J averages 1631 chill hours per winter, ranging from 1349 to 1903 across the last 10 years.
What hardiness zone is T1J?
T1J is in USDA hardiness zone 4a.

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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