A change is in the air, due to arrive at the end of the workweek and into the weekend. Rain is possible, but not a guarantee. Northern locations stand a much higher opportunity for moisture than southern locations. Everyone however, should see a wind shift which will help to clear out the cold morning temperatures and fog much of the state has seen.
The Willamette Valley is heading into mid 40s with mostly sunny skies. The morning may start off with some fog briefly. Temperatures will be cold as well—in the 20s to start the day. On Friday, winds should shift and begin to blow some of the stagnant air away. Highs will warm a degree or two from this wind shift. Reaching the mid to upper 40s. Overnight lows should return to near average and stay just above freezing. Weekend showers are possible, but not likely. Portland stands a decent chance for rain, while Eugene and Springfield may end up missing out.
The Oregon Coast has more sunshine instore for Thursday. Though a brown cloud will exist just offshore from the wildfires burning down in southern California. Some haze is expected all day due to the smoke, as well as a reduction in air quality. High temperatures on Thursday will reach the mid 50s. Come Friday and the weekend, winds shift and help blow the smoke away, but they’ll also send a few extra clouds overhead. Rain is possible each day, though not too likely. Northern places have higher opportunities for rain than southern ones. Temperatures each day should hover around 50 degrees.
The Umpqua Valley will wake up and see more clouds and fog on Wednesday. These gray conditions will persist for another day keeping highs in the 30s. But on Friday, winds shift will blow the fog out and allow some warmer air to move it. High temperatures for Friday and the weekend will range in the mid 40s. Rain is possible on Saturday and Sunday, but the odds are low. Dry weather is more likely for both days.
Updated Wednesday evening by meteorologist Travis Knudsen on December 13, 2017.
Today's Record Temperatures