Oregon Weather Alert: Showers Return to Portland by Thursday Morning With Weekend Thunderstorm Risk

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Oregon weather
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Portland, Oregon – Clouds and showers are set to make an extended comeback in Oregon, with Portland bracing for rain beginning Thursday and continuing through the weekend.

According to the National Weather Service in Portland, a 20 percent chance of showers starts midday Thursday, increasing to 40 percent by Thursday night. Skies will stay mostly cloudy, with daytime highs near 62°F and light, variable winds. Friday looks slightly calmer, but showers are likely to return by late Friday night, with a 60 percent chance of rain moving in after 11 p.m.

Saturday could see more impactful weather. Showers and even a thunderstorm are possible, with highs around 64°F. Residents planning weekend travel or outdoor events—especially along the I-5 corridor—should stay weather-aware and prepare for sudden downpours. Drivers are advised to keep headlights on, reduce speed on slick roads, and delay non-essential travel during storm periods.

By Sunday, rain chances decrease slightly, but lingering showers remain possible before tapering off into the new week. Monday and Tuesday appear drier, with highs in the upper 60s and partial sun returning.

Here’s your extended 5-day outlook:

  • Thursday: Mostly cloudy, 20% rain chance, high 62°F
  • Friday: Slight chance daytime, showers likely overnight, high 66°F
  • Saturday: Showers, chance of thunderstorms, high 64°F
  • Sunday: Partly sunny, slight chance of showers, high 64°F
  • Monday: Partly sunny, low 47°F, high near 68°F