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Chill hours in P3N

The short answer

P3N averages 1,153 chill hours per winter (9481,410 across 10 years) in USDA zone 4b.
P3N climate
Average chill hours1,153 (948–1,410 across 10 winters)
USDA hardiness zone4b (NRCan zone 4b)
Last spring frosttypically April 30 – May 17
First fall frosttypically October 16 – October 24

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 P3N’s chill hours and zone:

How many chill hours does P3N get?
P3N averages 1153 chill hours per winter, ranging from 948 to 1410 across the last 10 years.
What hardiness zone is P3N?
P3N is in USDA hardiness zone 4b.

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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