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Chill hours in T8S

The short answer

T8S averages 1,021 chill hours per winter (7771,245 across 10 years) in USDA zone 3a.
T8S climate
Average chill hours1,021 (777–1,245 across 10 winters)
USDA hardiness zone3a (NRCan zone 3a)
Last spring frosttypically April 27 – May 21
First fall frosttypically September 17 – October 5

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 T8S’s chill hours and zone:

How many chill hours does T8S get?
T8S averages 1021 chill hours per winter, ranging from 777 to 1245 across the last 10 years.
What hardiness zone is T8S?
T8S is in USDA hardiness zone 3a.

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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