Oregon — Windshield wipers thump steadily across Portland this morning as a thick curtain of December rain narrows the view along I-84 and Highway 26. Pavement glistens under low clouds, and headlights reflect sharply off the wet roadway, creating an early-day sense of urgency for anyone heading out.
Rain becomes widespread by late morning as a persistent Pacific plume moves inland. The National Weather Service signals 100% precipitation chances through today and Friday, with rainfall accumulating in several rounds. Light southeast winds shift southwest this afternoon, bringing breezy stretches that push surface water across lanes and increase hydroplaning risks. Drivers should slow down, allow longer following distances, and expect reduced visibility near bridges and river-adjacent corridors.
By Friday, another surge of moisture lifts highs into the upper 50s, keeping the region firmly above freezing—yet standing water, fog pockets, and continuous rainfall will still disrupt regional travel. While Portland will not see snow, meteorologists continue tracking a developing Arctic influence across the northern U.S., where long-range models show lake-effect snow from Dec. 11–17, possibly impacting major travel hubs from Michigan to New York. Early holiday travelers should stay flexible.
For Saturday, showers linger with a 100% chance, though rainfall intensity may ease by afternoon. Streets likely stay wet into Sunday, and intermittent rain continues as temperatures hold near mid-50s. No wintry mix is expected locally, but other Northwest valleys have already seen fog-induced black-ice episodes this week—an early-season reminder that travel can turn dangerous without warning.
Five-Day Outlook (Portland, OR)
• Today: Rain, high 48°F.
• Friday: Rain, high 57°F.
• Saturday: Rain, high 48°F.
• Sunday: Rain, high 56°F.
• Monday: Rain likely, high 57°F.
