Oregon weather is swinging sharply across the southern Willamette Valley this afternoon as dense morning fog rapidly gives way to bright sunshine and rising heat. Headlights glowed through thick fog near Eugene Airport earlier today while visibility briefly dropped to a quarter mile. By midday, however, skies cleared quickly and temperatures surged toward the lower 80s.
According to the National Weather Service, sunny skies dominate this afternoon with highs reaching near 81 degrees across Eugene and Springfield. Calm morning winds gradually shift northwest later today while dry air keeps conditions comfortable for outdoor holiday events. That warm and quiet pattern changes quickly by Memorial Day as Pacific moisture pushes inland.
Rain develops by late Monday morning with breezy southwest winds gusting near 28 mph across portions of the Willamette Valley. Showers continue Monday night and Tuesday while temperatures tumble from the lower 80s today into the lower 60s Tuesday afternoon. Isolated thunderstorms may also develop Tuesday after 2 p.m. as colder air spreads across western Oregon.
Meteorologists are monitoring colder air building into the Cascades Tuesday into Wednesday. While Eugene stays too warm for frozen precipitation, higher elevations could see late-season snow showers near mountain passes as snow levels briefly lower. That sharp temperature reversal may catch travelers off guard after several warm and sunny days.
Drivers should prepare for changing travel conditions along Interstate 5 and Highway 126 beginning Monday afternoon. Wet pavement, gusty crosswinds and reduced visibility may develop quickly during heavier showers. To be fair, widespread flooding concerns remain low for now, though isolated ponding on roads remains possible.
The broader Pacific Northwest becomes increasingly active through midweek as a Pacific low pressure system ends the West’s recent warm streak. Cooler spring air settles into Oregon and Washington before warmer conditions likely return later next week.
Five Day Outlook for Eugene, Oregon
- Memorial Day: Showers and breezy conditions developing. High near 69.
- Tuesday: Showers with isolated thunderstorms possible. High near 63.
- Wednesday: Partly sunny and cooler. High near 68.
- Thursday: Mostly sunny with milder weather returning. High near 74.
- Friday: Mostly cloudy with seasonable temperatures. High near 68.
