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Chill hours in P0W

The short answer

P0W averages 950 chill hours per winter (6781,241 across 10 years) in USDA zone 4a.
P0W climate
Average chill hours950 (678–1,241 across 10 winters)
USDA hardiness zone4a (NRCan zone 3a)
Last spring frosttypically May 4 – May 17
First fall frosttypically October 13 – November 1

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 P0W’s chill hours and zone:

Marginal (1)

Possible in a good year or a favorable microclimate — click through for the caveats.

Marginal varieties for this location
VarietyFruit
ReliancePeach
How many chill hours does P0W get?
P0W averages 950 chill hours per winter, ranging from 678 to 1241 across the last 10 years.
What hardiness zone is P0W?
P0W is in USDA hardiness zone 4a.

Growing fruit trees in P0W? Get a care calendar anchored to this exact climate, with email reminders.

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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