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Chill hours in T3E

The short answer

T3E averages 1,369 chill hours per winter (1,0051,615 across 10 years) in USDA zone 4a.
T3E climate
Average chill hours1,369 (1,005–1,615 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 T3E’s chill hours and zone:

How many chill hours does T3E get?
T3E averages 1369 chill hours per winter, ranging from 1005 to 1615 across the last 10 years.
What hardiness zone is T3E?
T3E 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