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Chill hours in C1A

The short answer

C1A averages 1,346 chill hours per winter (1,206–1,597 across 10 years) in USDA zone 6b.
C1A climate
Average chill hours1,346 (1,206–1,597 across 10 winters)
USDA hardiness zone6b (NRCan zone 5b)
Last spring frosttypically April 23 – May 12
First fall frosttypically October 30 – November 24

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 C1A’s chill hours and zone:

Marginal (16)

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

Marginal varieties for this location
VarietyFruit
TropicSweetApple
FlameprincePeach
FlordacrestPeach
GulfprincePeach
JunegoldPeach
LoringPeach
RedglobePeach
RedskinPeach
TropicBeautyPeach
UFGoldPeach
UFOnePeach
UFSunPeach
MoonglowPear
Green GagePlum
BrooksSweet Cherry
SunburstSweet Cherry
How many chill hours does C1A get?
C1A averages 1346 chill hours per winter, ranging from 1206 to 1597 across the last 10 years.
What hardiness zone is C1A?
C1A is in USDA hardiness zone 6b.

Growing fruit trees in C1A? Save your first tree free and see this month’s care tasks for this climate.

Save your first tree free

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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