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Chill hours in T6C

The short answer

T6C averages 1,102 chill hours per winter (7281,331 across 10 years) in USDA zone 3b.
T6C climate
Average chill hours1,102 (728–1,331 across 10 winters)
USDA hardiness zone3b (NRCan zone 3b)
Last spring frosttypically April 26 – May 21
First fall frosttypically September 28 – October 13

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 T6C’s chill hours and zone:

How many chill hours does T6C get?
T6C averages 1102 chill hours per winter, ranging from 728 to 1331 across the last 10 years.
What hardiness zone is T6C?
T6C is in USDA hardiness zone 3b.

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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