EUGENE, OR — A cold mist hugs the valley floor this morning as Eugene begins December under a thick blanket of fog and frost. The air feels damp and still, headlights cutting through a silvery haze along I-5 and Route 99. This quiet start to the week marks Oregon’s first strong taste of early winter, and changes are already brewing for midweek.
According to the National Weather Service in Portland, areas of frost and patchy fog will linger through midmorning Tuesday, followed by increasing clouds and a 40% chance of showers by afternoon. Temperatures will reach the low 50s, but cool rapidly after sunset, setting the stage for another foggy Wednesday morning.
Drivers should allow extra time for commutes through Tuesday, especially along low-lying corridors and rural routes near Creswell and Junction City. Frost on bridges and shaded roads may cause slick spots during early hours.
By Thursday, a mild Pacific front will bring steadier rain, signaling the start of a wetter stretch heading into the weekend. Highs will hover in the upper 40s to mid-50s, typical for early December but with that familiar Pacific chill returning each night.
5-Day Outlook (Eugene, OR):
- Monday: Patchy fog, high 48°F.
- Tuesday: Chance showers, high 51°F.
- Wednesday: Fog early, mostly cloudy, high 48°F.
- Thursday: Rain likely, high 49°F.
- Friday: Rain continues, high 55°F.
