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Chill hours in T0C

The short answer

T0C averages 1,077 chill hours per winter (6441,334 across 10 years) in USDA zone 3b.
T0C climate
Average chill hours1,077 (644–1,334 across 10 winters)
USDA hardiness zone3b (NRCan zone 3b)
Last spring frosttypically April 29 – May 21
First fall frosttypically September 28 – October 14

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 T0C’s chill hours and zone:

How many chill hours does T0C get?
T0C averages 1077 chill hours per winter, ranging from 644 to 1334 across the last 10 years.
What hardiness zone is T0C?
T0C 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