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Chill hours in 13684

The short answer

13684 averages 1,339 chill hours per winter (1,0751,680 across 10 years) in USDA zone 4b.
13684 climate
Average chill hours1,339 (1,075–1,680 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 26 – May 14
First fall frosttypically October 18 – November 3

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 13684’s chill hours and zone:

How many chill hours does 13684 get?
13684 averages 1339 chill hours per winter, ranging from 1075 to 1680 across the last 10 years.
What hardiness zone is 13684?
13684 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