El Niño

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Statistically speaking, it generally is the driest time of year in western Washington. Because of this, late July into early August is the most popular time for outdoor weddings and family reunions in the region.

But showers are in the forecast this weekend. If you were thinking of getting outdoors, you’ll have to travel east over the mountain passes, advises KPLU weather expert Cliff Mass. He says there’s a band of precipitation approaching from the west that will definitely dampen the region, pretty much anywhere west of the Cascades.

Tim Durkan Photography

The mid-week warm weather has been replaced by a cool swath of marine air that will linger for the early weekend and then dissipate into warmer temperatures come Sunday and Monday, said KPLU weather expert Cliff Mass.

Expect temperatures in the upper 60s to the low 70s with morning clouds for Saturday and early Sunday, Mass said.  The warmer temperatures -- potentially into low 80s -- will return briefly later Sunday and Monday. Cooler weather then will reassert itself late Monday.

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If beauty is in the eye of the beholder, KPLU weather expert Cliff Mass said he is is staring at a virtual 10.

"The weather will be as close to perfect as you can imagine," Mass said Friday. "No precipitation for anybody. Full sun for virtually everyone."

The temperature on Friday will hit the middle to upper 70s, Mass said.  Saturday will get warmer still with the heat pushing into the low 80s for Western Washington.  Sunday will be more of the same.

While warm, the weather isn't in full-hot mode, Mass said. The high pressure system off-shore will remain stable through the early part of the week with light winds picking up around 3 p.m. 

Northwest weather will return from it's vacation late in the week with some rain and clouds.

Mass said what we are seeing is a strong El Nino effect that will continue through winter.

Tim Durkan

Go ahead and gloat. We’ve got one of those hot, sunny August western Washington weekends ahead that make it worth living here despite the long, dark winters.

Low clouds will melt away, says KPLU weather expert Cliff Mass, as temperatures steadily rise over the weekend, hitting 90 maybe even as early as Sunday and certainly by Monday.  

“A warming period is going to happen,” said Mass. “And that’s because a trough that brought us cooler temperatures this week is moving off and a pretty high-amplitude ridge is building in its place.”

NOAA Climate Prediction Center

This summer in the Pacific Northwest will be warmer than average, according to the National Weather Service.

The supercomputers at the Weather Service's Climate Prediction Center have crunched long-term trends to produce an outlook for June, July and August. For most of the Northwest, the forecast gives a strong probability of above-normal temperatures.