Skip to content
EveryOrchard
Menu

Location almanac

Chill hours in 55607

The short answer

55607 averages 948 chill hours per winter (6181,319 across 10 years) in USDA zone 3b.
55607 climate
Average chill hours948 (618–1,319 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically May 4 – May 20
First fall frosttypically October 5 – October 17

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 55607’s chill hours and zone:

How many chill hours does 55607 get?
55607 averages 948 chill hours per winter, ranging from 618 to 1319 across the last 10 years.
What hardiness zone is 55607?
55607 is in USDA hardiness zone 3b.

Growing fruit trees in 55607? 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