Oregon – Frost coats windshields and lawns across the Portland metro this morning, turning quiet neighborhoods silver under clear skies. The cold is sharp enough to sting fingers, and it sets up a familiar winter hazard for early errands and holiday travel.
According to the National Weather Service in Portland, areas of frost are widespread through the morning hours, with temperatures hovering in the mid-30s near sunrise. Calm winds and clear skies are allowing cold air to settle, especially in low-lying areas and along the Willamette River corridor.
Drivers should watch for slick spots on bridges, overpasses, and shaded stretches of I-5, I-84, and Highway 26. Even where pavement looks dry, brief icing can linger until sunshine fully warms the surface. To be fair, conditions improve quickly once the sun gets higher.
By afternoon, temperatures rebound near 50 degrees with sunshine dominating much of the day. The relief is short-lived. Frost redevelops again late tonight and continues into Tuesday morning, repeating a pattern of mild afternoons and cold starts.
Midweek weather brings subtle changes. Clouds increase by Wednesday, but frost remains likely before sunrise. Daytime highs stay in the upper 40s to near 50, keeping winter firmly in place even without rain or snow. Looking farther out, NOAA’s 6–10 day outlook keeps temperatures near normal across the Pacific Northwest, while colder air grips much of the Midwest and East.
Residents should allow extra warm-up time, protect sensitive plants, and slow down on cold mornings. Flash freezing remains a risk where daytime moisture refreezes after dark.
How frosty did it feel where you live this morning? Share what conditions look like in your neighborhood.
Five-Day Weather Outlook for Portland, OR
MLK Day: Morning frost, then sunny, high near 50
Tuesday: Frost early, then sunny, high near 51
Wednesday: Frost early, mostly sunny, high near 49
Thursday: Frost early, partly sunny, high near 47
Friday: Morning frost, partly sunny, high near 48
