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 start of the week, but when will they end?
KGW Chief Meteorologist Matt Zaffino forecasts that this will be a long-duration heat wave. For three straight days, Portland hit record high temperatures and reached 100 degrees for the first time on Sunday, according to KGW meteorologist Rod Hill.
Temperatures could reach or exceed 100 degrees through Tuesday. Nighttime temperatures in the upper 60s and low 70s over the weekend through Tuesday morning may also set records for the warmest overnight lows. The hottest days will be Monday and Tuesday, reaching highs around 103 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.
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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