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Chill hours in T2L

The short answer

T2L averages 1,418 chill hours per winter (1,0051,704 across 10 years) in USDA zone 4a.
T2L climate
Average chill hours1,418 (1,005–1,704 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 T2L’s chill hours and zone:

How many chill hours does T2L get?
T2L averages 1418 chill hours per winter, ranging from 1005 to 1704 across the last 10 years.
What hardiness zone is T2L?
T2L 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