FrostList

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.

Icicles forming along a snowy roof edge — an early warning sign of ice dams backing water under the shingles — Oregon deadlines city by city
Photo: Valeria Boltneva / Pexels

Notable cities

All Oregon cities

CityLocal deadlineMedian first 28°F
BendOct 16Oct 4View →Checklist
GreshamNov 15Dec 15View →Checklist
PortlandDec 16Dec 20View →Checklist
BeavertonDec 16Dec 21View →Checklist
MedfordDec 16Nov 13View →Checklist
TigardDec 16Nov 30View →Checklist
Lake OswegoDec 16Dec 8View →Checklist
NovDecJanBendOct 16GreshamNov 15PortlandDec 16BeavertonDec 16MedfordDec 16TigardDec 16Lake OswegoDec 16

Local ice dam prevention deadlines for Oregon cities — built from each city’s own NOAA station, not one statewide date.

Ice Dam Prevention in Oregon: related searches

Oregon homeowners search for: ice dam removal cost, ice dam steaming, and "ice dam prevention near me" — every city page below answers those with local NOAA dates.

ice dam removal costice dam steamingroof rake for snow removalattic air sealingattic insulation R-valueheat cable for roofcalcium chloride sock ice damice and water shield

Back to the national Ice Dam Prevention guide, or see the methodology. You can also compare how the ice dam prevention window shifts in Oklahoma and Pennsylvania.

Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 25, 2026.