Seattle/ Weather & Environment

Sun’s Last Stand: Seattle Braces for Early September Soaker

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Published on August 31, 2026
Sun’s Last Stand: Seattle Braces for Early September SoakerSource: Google Street View

Seattle woke Monday, August 31, under clear skies and temperatures near 57 degrees, with one more mostly sunny afternoon ahead. The high should reach about 73 degrees before a much wetter, cooler pattern takes over in early September.

One More Dry Window For Seattle

Monday stays mostly sunny with north winds of 5 to 9 mph and almost no chance of rain. Tuesday should also be mostly sunny and a little warmer, topping out near 74 degrees, according to the National Weather Service.

Rain Arrives Late Tuesday

The forecast turns after 11 p.m. Tuesday, when a 30% chance of rain arrives under increasingly cloudy skies. Wednesday is the main weather pivot, with rain likely throughout the day, a high near 68 degrees and rainfall totals potentially reaching a quarter to half an inch.

Thursday Could Bring Thunderstorms

Showers and cooler temperatures continue Thursday, with rain likely before 11 a.m. and showers or thunderstorms possible from late morning into the afternoon. The high should reach only about 66 degrees, and gusty winds may make the day feel more like fall than the first week of September.

Windy Conditions Expand Beyond The City

The broader Western Washington forecast calls for gusty winds during the midweek system, with some areas potentially seeing gusts of 25 to 35 mph and stronger winds along the coast and islands. No land-based watches or warnings are listed for Seattle, but a gale watch covers several marine zones from Tuesday evening through Wednesday evening.

Cooler Weekend Forecast

Rain chances gradually ease Friday, which should be partly sunny with a high near 66 degrees. Saturday looks mostly sunny near 69 degrees, while Sunday stays partly sunny with a slight chance of rain after 11 a.m.