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Chill hours in T0L

The short answer

T0L averages 1,442 chill hours per winter (1,0551,708 across 10 years) in USDA zone 3b.
T0L climate
Average chill hours1,442 (1,055–1,708 across 10 winters)
USDA hardiness zone3b (NRCan zone 3b)
Last spring frosttypically May 12 – June 11
First fall frosttypically September 9 – September 27

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 T0L’s chill hours and zone:

How many chill hours does T0L get?
T0L averages 1442 chill hours per winter, ranging from 1055 to 1708 across the last 10 years.
What hardiness zone is T0L?
T0L is in USDA hardiness zone 3b.

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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