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Chill hours in R0L

The short answer

R0L averages 860 chill hours per winter (5321,310 across 10 years) in USDA zone 4a.
R0L climate
Average chill hours860 (532–1,310 across 10 winters)
USDA hardiness zone4a (NRCan zone 2b)
Last spring frosttypically May 3 – May 21
First fall frosttypically October 7 – October 23

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 R0L’s chill hours and zone:

Marginal (3)

Possible in a good year or a favorable microclimate — click through for the caveats.

Marginal varieties for this location
VarietyFruit
ContenderPeach
CresthavenPeach
ReliancePeach
How many chill hours does R0L get?
R0L averages 860 chill hours per winter, ranging from 532 to 1310 across the last 10 years.
What hardiness zone is R0L?
R0L is in USDA hardiness zone 4a.

Growing fruit trees in R0L? 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