PORTLAND, Ore. – A soft layer of fog clings to the Willamette River this early Tuesday morning, blurring city lights and quieting traffic along I-5. The still air and mild chill feel serene now, but the calm won’t last long. Portland’s streak of sunshine and dry air is on borrowed time — rain is set to return by late Thursday, marking the city’s slide back into its familiar fall rhythm.
According to the National Weather Service in Portland, patchy morning fog will lift by midmorning Tuesday, giving way to sunshine and highs near 66°F. Light north winds and dry conditions make for an ideal day for commutes, errands, or late-season yardwork. But clouds will start thickening Tuesday night, a subtle signal of what’s building offshore.
By Wednesday afternoon, scattered light showers could reach the coast and western valleys, increasing to a 50% chance of rain across Portland by Thursday night. Friday looks decidedly wetter, with steady rain likely and highs falling into the low 60s. While snow levels remain high — well above Cascade passes — cooler air and continuous moisture suggest the first early-winter storm pattern could form by next week.
Drivers should plan for slick roads and reduced visibility late Thursday through Friday morning, especially along I-84 and U.S. 26. For now, take advantage of today’s brief calm and sunshine — the Pacific’s gray curtain is already gathering offshore.
Five-Day Outlook for Portland, OR:
Tue: 66/47 – Fog early, then sunny.
Wed: 66/51 – Clouds increase; chance of showers.
Thu: 65/54 – Mostly cloudy; rain late.
Fri: 60/48 – Showers likely; cooler.
Sat: 55/45 – Rain continues; breezy at times.
