Portland drivers should brace for slick roads and reduced visibility Monday as a storm system pushes steady rain into the metro area. The National Weather Service warns of travel slowdowns along I-5 and I-84, with heaviest showers developing by late morning. Commuters are urged to allow extra time and avoid standing water on highways.
According to the National Weather Service, rainfall chances climb to 80% Monday across northwest Oregon, including Multnomah, Washington, and Clackamas counties. Rain begins late Sunday and continues through Monday evening, dropping a quarter to half an inch across much of the Willamette Valley. Conditions remain damp into Tuesday, with showers likely at 70%.
Localized street flooding is possible in low-lying areas of Portland and Gresham. Drivers should watch for ponding near freeway ramps and slower traffic through bottlenecks. Outdoor events may face cancellations Monday afternoon as rain intensifies. Emergency managers urge residents to clear storm drains and secure outdoor furniture before heavier rain arrives.
By Wednesday, another round of showers is expected, and forecasters note thunder could accompany some cells. Temperatures trend cooler as the calendar turns to October, hovering in the mid-60s for highs and mid-50s for lows. The first days of October look unsettled, keeping the pattern of wet fall weather in place.
Residents should monitor advisories into midweek, as additional rain chances linger. Authorities caution that updates may follow if rainfall totals increase or stronger storms develop.
Five Day Forecast for Portland, Oregon
- Saturday: Increasing clouds, high near 77.
- Sunday: Mostly cloudy, high near 75.
- Monday: Showers likely, high near 67.
- Tuesday: Showers likely, high near 67.
- Wednesday: Showers, chance of thunder, high near 66.
