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Chill hours in V9A

The short answer

V9A averages 2,516 chill hours per winter (2,2112,809 across 10 years) in USDA zone 9a.
V9A climate
Average chill hours2,516 (2,211–2,809 across 10 winters)
USDA hardiness zone9a (NRCan zone 9a)
Last spring frosttypically January 3 – March 25
First fall frosttypically December 4 – December 13

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 V9A’s chill hours and zone:

How many chill hours does V9A get?
V9A averages 2516 chill hours per winter, ranging from 2211 to 2809 across the last 10 years.
What hardiness zone is V9A?
V9A is in USDA hardiness zone 9a.

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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