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Chill hours in G0A

The short answer

G0A averages 857 chill hours per winter (671991 across 10 years) in USDA zone 4a.
G0A climate
Average chill hours857 (671–991 across 10 winters)
USDA hardiness zone4a (NRCan zone 2b)
Last spring frosttypically May 18 – May 31
First fall frosttypically September 24 – 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 G0A’s chill hours and zone:

Marginal (2)

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

Marginal varieties for this location
VarietyFruit
ContenderPeach
CresthavenPeach
How many chill hours does G0A get?
G0A averages 857 chill hours per winter, ranging from 671 to 991 across the last 10 years.
What hardiness zone is G0A?
G0A is in USDA hardiness zone 4a.

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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