Brace yourself for a hot weekend, a scorching Monday and a couple of wild temperature swings as an upper-level ridge moves into the Puget Sound region, bringing what is likely to be our first 90-degree day of the year.

After a mild summer day on Friday, with high temperatures hitting 72 degrees at Seattle-Tacoma International Airport, things should start to warm up into the mid-80s on Saturday and the mid- to upper 80s on Sunday, according to the National Weather Service in Seattle.

And Monday is likely to be a scorcher, at 90 degrees in the Seattle metropolitan area, weather service meteorologist Steve Reedy said. Our warmest day so far this year was May 10, when we hit 87 degrees.

As the upper-level ridge moves out, it will be followed by an upper-level trough, bringing temperatures down on Tuesday back into our “normal range” of mid-70s, weather service meteorologist Art Gabel said.

“Fortunately, we’ll feel the influence with an onshore flow of cooler marine air,” Reedy said Friday morning.

It will cool down more on Wednesday with a high in the mid- to upper 70s, and on Thursday, we’re back at about 75 degrees, he said.

“It’ll be hot, but thankfully, that doesn’t stick around,” Reedy said. “The next few days will be like the rest of 2020: a roller coaster.”

Seattle Times staff reporter Elise Takahama contributed to this story.

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