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Chill hours in J9P

The short answer

J9P averages 999 chill hours per winter (7571,275 across 10 years) in USDA zone 4a.
J9P climate
Average chill hours999 (757–1,275 across 10 winters)
USDA hardiness zone4a (NRCan zone 3a)
Last spring frosttypically May 7 – May 28
First fall frosttypically September 24 – October 25

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 J9P’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 J9P get?
J9P averages 999 chill hours per winter, ranging from 757 to 1275 across the last 10 years.
What hardiness zone is J9P?
J9P is in USDA hardiness zone 4a.

Growing fruit trees in J9P? 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