PORTLAND – Raindrops glisten under early streetlights this morning as Oregon’s gray skies take firm control again. A new storm system is forming offshore — the first in a series of Pacific fronts expected to soak northwestern Oregon through the week.
The National Weather Service in Portland reports that light rain begins spreading inland late Sunday night, followed by a steady soaking through Monday and Tuesday. The most active period arrives Tuesday afternoon into Wednesday morning, when stronger showers and gusty winds will impact much of the metro area and nearby valleys. Local rainfall totals could exceed two inches by midweek, especially along the Coast Range and Cascade foothills.
Winds may gust between 20 and 25 mph, making travel across bridges and higher elevations a bit tricky. Commuters on I-5, Highway 26, and I-84 should expect slower travel times during the Tuesday and Wednesday morning drives, with standing water possible on roads and freeways.
Temperatures remain mild through midweek, hovering in the mid- to upper-50s. But a cooler push of air arrives by late week, signaling a November transition toward early winter conditions. Once the rain clears by Friday, models hint at the potential for frost and valley fog into the weekend — a likely first taste of chilly mornings heading into mid-November.
For now, umbrellas stay essential and gutters need clearing. After a brief calm early next weekend, another round of rain could return before Thanksgiving travel season begins, part of a wetter-than-average pattern favored under the ongoing La Niña setup.
Five-Day Outlook for Portland, OR:
Mon: 55/47 – Rain develops; breezy.
Tue: 60/51 – Heavy rain; windy at times.
Wed: 59/51 – Showers and breeze; tapering late.
Thu: 58/49 – Rain; cool trend continues.
Fri: 57/45 – Clearing; chance of frost early.
