PORTLAND, Ore. – Gray dawn breaks softly over the Willamette River, a thin mist curling between bridges as the city wakes to still, humid air. It’s the calm before a damp, familiar pattern—the Pacific is stirring again, and Portland’s brief run of sunshine won’t last much longer.
According to the National Weather Service in Portland, skies will stay mostly sunny today with highs near 68°F, the warmest part of the week. It’s an ideal window for outdoor errands or pre-Halloween yard prep. By tonight, temperatures cool into the 40s under mostly clear skies, but clouds will begin thickening Thursday as moisture creeps in from offshore.
By Friday, the transition is underway. Light rain could begin by late afternoon, with steadier showers expected after dark—timed perfectly, if inconveniently, for Halloween festivities. Trick-or-treaters across Portland, Vancouver, and Gresham should plan for umbrellas and reflective gear. Showers may cause wet pavement along I-5 and slower local traffic through downtown and East Portland neighborhoods.
Rain becomes more persistent Saturday, with the chance of gusty winds and cooler highs near 58°F. Sunday may bring partial clearing, though scattered showers could linger north of the Columbia.
To be fair, it’s classic late October—sun, then drizzle, then steady Pacific moisture marching inland.
After all, clocks “fall back” at 2 a.m. Sunday, ushering in darker evenings and a chillier start to early November.
Five-Day Outlook for Portland, OR:
Wed: 68/43 – Mostly sunny; calm and mild.
Thu: 58/43 – Clouds increasing; still dry.
Fri: 58/52 – Cloudy; showers developing late; wet Halloween evening.
Sat: 59/46 – Rain likely; breezy and cool.
Sun: 57/44 – Chance of showers; partial clearing late.
