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Chill hours in P3E

The short answer

P3E averages 1,217 chill hours per winter (9981,527 across 10 years) in USDA zone 4b.
P3E climate
Average chill hours1,217 (998–1,527 across 10 winters)
USDA hardiness zone4b (NRCan zone 4b)
Last spring frosttypically April 27 – May 17
First fall frosttypically October 18 – October 31

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 P3E’s chill hours and zone:

How many chill hours does P3E get?
P3E averages 1217 chill hours per winter, ranging from 998 to 1527 across the last 10 years.
What hardiness zone is P3E?
P3E 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