Skip to content
EveryOrchard
Menu

Location almanac

Chill hours in 55065

The short answer

55065 averages 1,222 chill hours per winter (1,0511,482 across 10 years) in USDA zone 4b.
55065 climate
Average chill hours1,222 (1,051–1,482 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 25 – May 13
First fall frosttypically October 14 – November 13

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 55065’s chill hours and zone:

How many chill hours does 55065 get?
55065 averages 1222 chill hours per winter, ranging from 1051 to 1482 across the last 10 years.
What hardiness zone is 55065?
55065 is in USDA hardiness zone 4b.

Growing fruit trees in 55065? Get a care calendar anchored to this exact climate, with email reminders.

Start My Orchard

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