Portland/ Weather & Environment

From Drizzle to Sizzle: Portland Labor Day Weekend Heats Up Into Sunny September

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Published on September 04, 2026
From Drizzle to Sizzle: Portland Labor Day Weekend Heats Up Into Sunny SeptemberSource: Google Street View

Portland is starting Friday with light rain, damp streets and temperatures in the mid-50s, but the gray opening is not expected to last all day. Fog should thin by morning, skies should brighten, and the city could reach about 71 degrees before a small afternoon shower or thunderstorm chance arrives. The forecast then turns steadily warmer and drier next week.

Fog, Sun And A Small Storm Chance Friday

Patchy fog is expected before 8 a.m. Friday, followed by mostly sunny skies and light winds. The National Weather Service Portland office puts the chance of showers or thunderstorms between 2 and 4 p.m. at about 20%, with brief heavy rain or gusty winds possible in any stronger cell, according to the National Weather Service.

That is a quieter setup than Thursday's wetter, stormier forecast, making this update a bit of a weather plot twist rather than a full sequel to Hoodline's Thursday forecast. Winds in the city are expected to remain light for most of the day, although any thunderstorm could produce a sudden, erratic gust.

Weekend Plans May Need A Light Jacket

Saturday brings another round of morning fog and a slight chance of rain showers before 10 a.m. The afternoon should stay mostly cloudy with a high near 72 degrees, while Saturday night dips to about 55.

Sunday looks a little brighter and warmer, with partly sunny skies and a high near 75. A slight chance of rain returns after 5 p.m., followed by partly cloudy conditions Sunday night.

Labor Day Starts A Warmer Stretch

Labor Day is forecast to be mostly sunny with a high around 75 degrees, offering a more reliable outdoor window than the earlier part of the weekend. Portland then reaches about 77 on Tuesday before a sunny Wednesday climbs to roughly 82.

Thursday should remain mostly sunny with a high near 78 degrees. The National Weather Service lists no watches, warnings or advisories for the Portland area, but the lingering shower and thunderstorm chances mean weekend plans should still allow for a quick change in conditions.