Skip to content
EveryOrchard
Menu

Location almanac

Chill hours in S4P

The short answer

S4P averages 1,011 chill hours per winter (6391,324 across 10 years) in USDA zone 4a.
S4P climate
Average chill hours1,011 (639–1,324 across 10 winters)
USDA hardiness zone4a (NRCan zone 3a)
Last spring frosttypically May 1 – May 21
First fall frosttypically September 28 – October 14

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 S4P’s chill hours and zone:

How many chill hours does S4P get?
S4P averages 1011 chill hours per winter, ranging from 639 to 1324 across the last 10 years.
What hardiness zone is S4P?
S4P is in USDA hardiness zone 4a.

Growing fruit trees in S4P? Get a care calendar anchored to this exact climate, with email reminders.

Start My Orchard

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