Skip to content
EveryOrchard
Menu

Location almanac

Chill hours in T3R

The short answer

T3R averages 1,367 chill hours per winter (9451,632 across 10 years) in USDA zone 4a.
T3R climate
Average chill hours1,367 (945–1,632 across 10 winters)
USDA hardiness zone4a (NRCan zone 3b)
Last spring frosttypically May 2 – May 31
First fall frosttypically September 13 – October 4

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 T3R’s chill hours and zone:

How many chill hours does T3R get?
T3R averages 1367 chill hours per winter, ranging from 945 to 1632 across the last 10 years.
What hardiness zone is T3R?
T3R is in USDA hardiness zone 4a.

Growing fruit trees in T3R? Get a care calendar anchored to this exact climate, with email reminders.

Start My Orchard

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