First significant rainfall of summer to bring cooler temps to Portland

PORTLAND, Ore. (KOIN) — After nearly a month of dry weather with only a spattering of rain here and there, the first significant system of the summer is arriving on the Oregon coast Monday morning.

Light rain will push into the Willamette Valley and that will help to keep temperatures cooler across the metro area, along with scattered light rain from time to time. In fact, daytime highs may only top out in the mid-70s locally. That is below normal for what is typically the hottest week of the year in Portland.