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Chill hours in 13404

The short answer

13404 averages 1,455 chill hours per winter (1,1501,768 across 10 years) in USDA zone 4b.
13404 climate
Average chill hours1,455 (1,150–1,768 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 26 – May 10
First fall frosttypically October 18 – November 4

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 13404’s chill hours and zone:

How many chill hours does 13404 get?
13404 averages 1455 chill hours per winter, ranging from 1150 to 1768 across the last 10 years.
What hardiness zone is 13404?
13404 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