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Enjoy ‘Perfect Fall Weather’ For The Next Week If You Live In Western Washington

Elaine Thompson / File
AP Photo
A man practices casting off a dock at Seattle's Green Lake park and in view of trees turning brilliant autumnal shades behind, Wednesday, Oct. 25, 2017.

A big ridge of high pressure is setting up that will lock in increasingly sunny and warm days in the week ahead all around Western Washington.   

KNKX weather expert Cliff Mass, who teaches atmospheric sciences at the University of Washington, says if you’re into watching storms or other exciting weather features, you’re not going to find them in the Evergreen state this week.

No Rain, Sun Every Day

“We have a boring forecast,” Mass says. “High pressure has built on us and it’ll build even more during the next few days.”

That means a forecast that most people will look forward to.

“We have at least a week of no rain, sun every day. And it’s going to be extraordinary,” Mass said.

Some Morning Fog

One issue with the ridge of high pressure, Mass says, is that it tends to come with fog in the morning. That was true on Friday morning, which started with lots of low clouds and fog all around the region. He predicts more of that on Saturday.

“But as we get into the weekend, we’ll get more offshore flow as the high pressure at the surface builds inland more. And that’s going to prevent most of the low clouds and fog on Sunday and Monday,” he says.

And temperatures will get into the low 60s on Friday, steadily climbing over the weekend into the mid-60s by Sunday and mid- to upper-60s on Monday and Tuesday.

“It’s amazing. This ridge is going to lock in place and it’s going to stay there at least till the end of next week. So we’re going to have really perfect fall weather – at least through next Friday,” Mass says.

To hear the full conversation, including Cliff’s take on Hurricane Michael and how well it was forecasted, you can click on the 'play' icon at the top of this post.

Weather with Cliff Mass airs at 9:02 a.m. Friday, right after BirdNote, and twice on Friday afternoons during All Things Considered. The feature is hosted by KNKX environment reporter Bellamy Pailthorp. Cliff Mass is a University of Washington professor of atmospheric sciences, a renowned Seattle weather prognosticator, anda popular weather blogger. You can also subscribe to podcasts of Weather with Cliff Mass shows, viaiTunes or Google Play.

Bellamy Pailthorp covers the environment for KNKX with an emphasis on climate justice, human health and food sovereignty. She enjoys reporting about how we will power our future while maintaining healthy cultures and livable cities. Story tips can be sent to