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Chill hours in T7N

The short answer

T7N averages 1,179 chill hours per winter (8921,390 across 10 years) in USDA zone 3b.
T7N climate
Average chill hours1,179 (892–1,390 across 10 winters)
USDA hardiness zone3b (NRCan zone 3a)
Last spring frosttypically April 26 – May 21
First fall frosttypically September 27 – October 21

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 T7N’s chill hours and zone:

How many chill hours does T7N get?
T7N averages 1179 chill hours per winter, ranging from 892 to 1390 across the last 10 years.
What hardiness zone is T7N?
T7N 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