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Chill hours in T2S

The short answer

T2S averages 1,361 chill hours per winter (9331,672 across 10 years) in USDA zone 4a.
T2S climate
Average chill hours1,361 (933–1,672 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 T2S’s chill hours and zone:

How many chill hours does T2S get?
T2S averages 1361 chill hours per winter, ranging from 933 to 1672 across the last 10 years.
What hardiness zone is T2S?
T2S 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