Chilly Rain and Mountain Snow: A Damp Tuesday Ahead for Portland

Portland’s Tuesday Outlook: Rain and Chilly Temps

Portland residents are waking up to a brisk and damp Tuesday, March 10, 2026. The Rose City is seeing a significant shift in the atmosphere today, as a moisture-laden system moves through the Pacific Northwest. If you haven't already, now is the time to dig out those heavy coats and reliable umbrellas, as the forecast suggests a day defined by grey skies and fluctuating precipitation.

Morning: A Cold and Cloudy Start

The morning hours are starting off with high humidity, hovering around 90%, creating a thick, damp chill across the metro area. Temperatures early this Tuesday are sitting at a cold 37°F, but with the wind chill, it feels closer to 34°F. While the morning may remain mostly cloudy with only a 20% chance of light rain, the atmosphere is primed for more consistent moisture as the day progresses. Commuters should be wary of slick spots on the roads, especially in higher elevations around the West Hills where the air remains biting.

Afternoon: Light Rain and Peak Temperatures

As we move into the afternoon, Portland will see a modest rise in temperature, reaching a daytime high of approximately 46°F. However, the chance of precipitation increases significantly. Forecasters are predicting light rain throughout the afternoon hours. While the city remains in the mid-40s, there is a statistical 45% chance of a rain-snow mix or light snow flurries during the day, though accumulation is unlikely on the valley floor. Humidity will remain high, near 76%, keeping the air feeling heavy and cold throughout the workday.

Evening and Night: Showers and Cascade Alerts

Heading into the evening, the mercury will drop back toward a low of 35°F. Rain showers are expected to become more consistent tonight, with the probability of precipitation rising to 65%. For those planning to travel through the mountain passes, the National Weather Service has issued winter weather advisories. While Portland stays primarily in the rain, the Cascades are expecting up to 10 inches of snow above 3,000 feet by tomorrow. This mountain activity, coupled with wind gusts in the region reaching up to 35 mph, could make travel over the passes extremely difficult after dark.

Severe Weather Notices

The National Weather Service Portland office has also flagged potential threats for severe thunderstorms and localized flooding throughout Tuesday. Residents in flood-prone areas should remain vigilant, as the steady rain combined with rising snow levels in the Cascades by Wednesday morning could increase runoff into local tributaries. Stay dry, Portland, and keep an eye on the skies as this winter-like system continues to move through the region.