Des Moines, Iowa – St. Patrick’s Day celebrations across Iowa could turn soggy as a wetter-than-normal pattern lines up with peak parade season and the arrival of spring. From Des Moines to Cedar Rapids and Sioux City, communities face elevated rain chances 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 rainfall across all of Iowa during that stretch. The broader signal spans much of the Midwest, reinforcing confidence in an active storm track capable of delivering multiple rounds of rain. The temperature outlook also shows a 40 to 50 percent probability of above-average temperatures statewide, increasing the likelihood that precipitation falls as rain instead of late-season snow.
In Des Moines, where the downtown parade and Court Avenue festivities draw large crowds, wet pavement could slow traffic along I-235 and I-80. Cedar Rapids events near the Cedar River may contend with slick sidewalks and muddy staging areas, while Sioux City could see steady rainfall at times if systems track across the Plains.
Event organizers should secure tents, protect electrical equipment and prepare indoor backup options where possible. Drivers should allow extra time on major highways during peak celebration hours.
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 Iowa. Additional updates are expected as mid-March approaches.
