Skip to content
EveryOrchard
Menu

Location almanac

Chill hours in 55707

The short answer

55707 averages 1,066 chill hours per winter (8021,431 across 10 years) in USDA zone 4a.
55707 climate
Average chill hours1,066 (802–1,431 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 27 – May 13
First fall frosttypically October 11 – November 2

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 55707’s chill hours and zone:

How many chill hours does 55707 get?
55707 averages 1066 chill hours per winter, ranging from 802 to 1431 across the last 10 years.
What hardiness zone is 55707?
55707 is in USDA hardiness zone 4a.

Growing fruit trees in 55707? 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