Portland starts Sunday, August 9, near 57 degrees with humid air and a mostly clear sky, offering a cooler reset after five straight days in the 90s. The break is temporary, though: temperatures will climb back toward the upper 80s by Friday.
Sunny Sunday, With Afternoon Winds
Sunday will be sunny with a high near 82 degrees, according to the National Weather Service in Portland. Northwest winds will run 3 to 8 mph during the day and may gust close to 20 mph inland, especially from the afternoon into the evening.
Sunday night should stay mostly clear, with temperatures dipping to around 57 degrees. Winds could gust as high as 18 mph overnight, so patio umbrellas and other lightweight backyard items may want to take the night off.
Warmth Builds Again Later This Week
Monday and Tuesday will remain mostly sunny with highs near 82 degrees, followed by a slightly cooler Wednesday near 80. Rain chances remain close to zero, with only a 2% chance forecast Wednesday and no meaningful precipitation expected through the middle of the week.
The warmup resumes Thursday, when Portland could reach 84 degrees, then peaks near 88 on Friday before easing slightly to around 86 Saturday. Overnight lows will mostly stay in the upper 50s through Wednesday, rising to around 61 Thursday and Friday nights.
