Here’s when the Portland-area heat wave is expected to end

PORTLAND, Ore. — Beginning with the Fourth of July, the Portland metro area entered a period of extreme heat that’s expected to last for days, reaching the triple digits. The high temperatures will persist at least through the weekend, but when will they end?

KGW Chief Meteorologist Matt Zaffino forecasts that this will be a long-duration heat wave. Starting Saturday, temperatures could reach or exceed 100 degrees for four straight days. Nighttime temperatures in the upper 60s and low 70s over the weekend through Tuesday morning may also set records for the warmest overnight lows.

Portland set a record high temperature of 99 degrees Friday. Salem hit 103 and Hillsboro reached 100.

The hottest days will be Monday and Tuesday, Zaffino said, reaching highs around 104 degrees.

Even though triple-digit temperatures should subside after Tuesday, it won’t be the end of heat. High temperatures will likely hover around the low 90s on Wednesday, and are expected to remain between 10 and 15 degrees above average through the week, in the high 80s and low 90s.

KEEPING COOL: Here are the cooling centers open in Portland area during heat wave

That said, the worst should be over by Wednesday. An excessive heat warning from the National Weather Service ends for the Portland area at 10 p.m. on Tuesday, July 9.

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