A Mild Start to March: Clouds Gather as Spring Teases the Rose City

Morning: A Chilly but Quiet Introduction to March

As the calendar turns to Sunday, March 1, 2026, Portlanders can expect a calm and predominantly dry start to the new month. The morning hours will be defined by overcast skies and a crisp chill in the air. Temperatures are expected to start in the low 40s, with a localized low of approximately 40°F to 41°F. While the clouds will remain thick throughout the early hours, there is no immediate threat of precipitation for those heading out for early coffee runs or morning walks along the Willamette River. Humidity will be high, hovering around 73%, but the winds will remain light and variable, providing a still, quiet atmosphere to begin the day.

Afternoon: Unseasonable Warmth Before the Clouds Thicken

By the afternoon, Portland will experience a notable warm-up, with temperatures climbing toward a high of 58°F to 60°F. This is slightly milder than the typical early March average, offering a pleasant reprieve for outdoor activities. However, the 'Rose City' will remain under a canopy of clouds. While much of the region north of Salem is expected to stay dry for the majority of the daylight hours, moisture will begin to gather toward the south. Wind conditions will remain manageable, shifting to come from the East-Northeast at roughly 8 to 10 miles per hour. Despite the thickening cloud cover, visibility is expected to remain clear at 10 miles, making it a decent afternoon for travel across the metro area.

Evening: Umbrellas at the Ready for Late Showers

The weather story takes a turn as we approach the evening hours. Forecasters are tracking a 30% to 33% chance of rain, with the highest probability of showers arriving after 4:00 PM and continuing through 10:00 PM. These showers are expected to be light and scattered rather than a heavy downpour. As the sun sets, the temperature will begin its descent back toward a low of 44°F. If you have evening plans downtown, it is advisable to keep a light jacket or umbrella handy, though the rain is not expected to be significant enough to cause travel delays. Looking ahead, the cloud cover will persist into the night, setting the stage for a more active and wetter weather pattern expected later in the week.