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Chill hours in T2H

The short answer

T2H averages 1,328 chill hours per winter (9621,575 across 10 years) in USDA zone 4a.
T2H climate
Average chill hours1,328 (962–1,575 across 10 winters)
USDA hardiness zone4a (NRCan zone 4a)
Last spring frosttypically May 2 – May 22
First fall frosttypically September 13 – 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 T2H’s chill hours and zone:

How many chill hours does T2H get?
T2H averages 1328 chill hours per winter, ranging from 962 to 1575 across the last 10 years.
What hardiness zone is T2H?
T2H 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