Skip to content
EveryOrchard
Menu

Location almanac

Chill hours in T8A

The short answer

T8A averages 1,106 chill hours per winter (7321,309 across 10 years) in USDA zone 3b.
T8A climate
Average chill hours1,106 (732–1,309 across 10 winters)
USDA hardiness zone3b (NRCan zone 3b)
Last spring frosttypically April 26 – May 21
First fall frosttypically September 28 – 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 T8A’s chill hours and zone:

How many chill hours does T8A get?
T8A averages 1106 chill hours per winter, ranging from 732 to 1309 across the last 10 years.
What hardiness zone is T8A?
T8A is in USDA hardiness zone 3b.

Growing fruit trees in T8A? 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