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Chill hours in T9N

The short answer

T9N averages 965 chill hours per winter (6241,167 across 10 years) in USDA zone 3b.
T9N climate
Average chill hours965 (624–1,167 across 10 winters)
USDA hardiness zone3b (NRCan zone 2b)
Last spring frosttypically April 30 – May 21
First fall frosttypically September 27 – October 13

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 T9N’s chill hours and zone:

How many chill hours does T9N get?
T9N averages 965 chill hours per winter, ranging from 624 to 1167 across the last 10 years.
What hardiness zone is T9N?
T9N 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