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Chill hours in P7L

The short answer

P7L averages 944 chill hours per winter (5521,354 across 10 years) in USDA zone 4b.
P7L climate
Average chill hours944 (552–1,354 across 10 winters)
USDA hardiness zone4b (NRCan zone 3b)
Last spring frosttypically May 11 – May 25
First fall frosttypically September 29 – October 21

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 P7L’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 P7L get?
P7L averages 944 chill hours per winter, ranging from 552 to 1354 across the last 10 years.
What hardiness zone is P7L?
P7L is in USDA hardiness zone 4b.

Growing fruit trees in P7L? 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