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Chill hours in T1V

The short answer

T1V averages 1,398 chill hours per winter (1,1051,694 across 10 years) in USDA zone 4a.
T1V climate
Average chill hours1,398 (1,105–1,694 across 10 winters)
USDA hardiness zone4a (NRCan zone 4a)
Last spring frosttypically May 2 – May 22
First fall frosttypically September 14 – October 6

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 T1V’s chill hours and zone:

How many chill hours does T1V get?
T1V averages 1398 chill hours per winter, ranging from 1105 to 1694 across the last 10 years.
What hardiness zone is T1V?
T1V 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