Seattle, Washington – St. Patrick’s Day celebrations across Washington could unfold under steady showers as a wetter-than-normal pattern sets up during peak parade season. From Seattle to Tacoma and Spokane, elevated precipitation chances are projected between March 14 and March 27, overlapping with the holiday and the first official day of spring on March 20.
According to the National Oceanic and Atmospheric Administration’s Climate Prediction Center, the three- to four-week precipitation outlook issued February 27 favors above-normal precipitation across all of Washington during that stretch. The broader signal spans the Pacific Northwest and Northern Rockies, reinforcing confidence in an active storm track capable of delivering multiple rounds of rain. Unlike much of the Midwest and Southeast, parts of the Pacific Northwest are favored to see below-normal temperatures during this period, which could keep conditions cool and damp, especially west of the Cascades.
In Seattle, where the St. Patrick’s Day Dash and downtown celebrations draw thousands, wet pavement could slow traffic along I-5 and I-90. Tacoma events near the waterfront may contend with steady showers and slick sidewalks, while Spokane could see periods of rain depending on storm track placement east of the Cascades.
Event organizers should secure tents, protect sound and electrical equipment and prepare for muddy conditions in parks and open gathering spaces. Drivers should allow extra travel time, particularly during heavier showers.
This long-range outlook does not guarantee rain on St. Patrick’s Day itself, but it strengthens the case for a wetter-than-normal stretch across Washington. Additional updates are expected as mid-March approaches.
