Ice Dam Prevention in Oregon

In Oregon, local ice dams deadlines run from Oct 16 to Dec 16, with a median around Dec 16 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.

Jump to a city

Notable cities

Bend — earliest deadline in the state
Lake Oswego — latest deadline in the state
Beaverton — near the state median

All Oregon cities

City	Local deadline	Median first 28°F
Bend	Oct 16	Oct 4	View →	Checklist
Gresham	Nov 15	Dec 15	View →	Checklist
Portland	Dec 16	Dec 20	View →	Checklist
Beaverton	Dec 16	Dec 21	View →	Checklist
Medford	Dec 16	Nov 13	View →	Checklist
Tigard	Dec 16	Nov 30	View →	Checklist
Lake Oswego	Dec 16	Dec 8	View →	Checklist

Back to the national Ice Dam Prevention guide, or see the methodology.

Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 11, 2026.