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Chill hours in P5N

The short answer

P5N averages 951 chill hours per winter (6091,159 across 10 years) in USDA zone 4a.
P5N climate
Average chill hours951 (609–1,159 across 10 winters)
USDA hardiness zone4a (NRCan zone 2a)
Last spring frosttypically May 11 – May 31
First fall frosttypically September 23 – October 17

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 P5N’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 P5N get?
P5N averages 951 chill hours per winter, ranging from 609 to 1159 across the last 10 years.
What hardiness zone is P5N?
P5N is in USDA hardiness zone 4a.

Growing fruit trees in P5N? 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