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Chill hours in S7W

The short answer

S7W averages 875 chill hours per winter (5131,271 across 10 years) in USDA zone 3b.
S7W climate
Average chill hours875 (513–1,271 across 10 winters)
USDA hardiness zone3b (NRCan zone 3a)
Last spring frosttypically April 30 – May 21
First fall frosttypically September 22 – October 12

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 S7W’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
CresthavenPeach
How many chill hours does S7W get?
S7W averages 875 chill hours per winter, ranging from 513 to 1271 across the last 10 years.
What hardiness zone is S7W?
S7W is in USDA hardiness zone 3b.

Growing fruit trees in S7W? 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