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Chill hours in 12810

The short answer

12810 averages 1,364 chill hours per winter (1,0771,786 across 10 years) in USDA zone 4b.
12810 climate
Average chill hours1,364 (1,077–1,786 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 23 – May 17
First fall frosttypically October 17 – October 26

Computed from 10 winters of ERA5 hourly temperature (Open-Meteo, 2015–2025); zones from USDA PHZM 2023. Data updated July 3, 2026. See methodology.

Every variety in our database, checked against 12810’s chill hours and zone:

How many chill hours does 12810 get?
12810 averages 1364 chill hours per winter, ranging from 1077 to 1786 across the last 10 years.
What hardiness zone is 12810?
12810 is in USDA hardiness zone 4b.

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Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026