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Chill hours in T5P

The short answer

T5P averages 1,110 chill hours per winter (7441,349 across 10 years) in USDA zone 3b.
T5P climate
Average chill hours1,110 (744–1,349 across 10 winters)
USDA hardiness zone3b (NRCan zone 4a)
Last spring frosttypically April 26 – May 21
First fall frosttypically September 28 – October 22

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 T5P’s chill hours and zone:

How many chill hours does T5P get?
T5P averages 1110 chill hours per winter, ranging from 744 to 1349 across the last 10 years.
What hardiness zone is T5P?
T5P 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