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Chill hours in T1K

The short answer

T1K averages 1,634 chill hours per winter (1,3251,898 across 10 years) in USDA zone 4a.
T1K climate
Average chill hours1,634 (1,325–1,898 across 10 winters)
USDA hardiness zone4a (NRCan zone 4a)
Last spring frosttypically April 26 – 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 T1K’s chill hours and zone:

How many chill hours does T1K get?
T1K averages 1634 chill hours per winter, ranging from 1325 to 1898 across the last 10 years.
What hardiness zone is T1K?
T1K 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