George W. Nims, a student at the Seabury Divinity School in Faribault, attempts to assassinate Bishop Henry B. Whipple. During a church service, Nims rises from the congregation, walks into the chancel, and points his pistol at Whipple. Luckily, he had forgotten to cock the hammer, giving bystanders enough time to tackle and subdue him. Whipple had turned him down for ordainment with his class as he had shown signs of being mentally unbalanced. Judged insane, he is sent to the asylum in St. Peter.

Albert Henry Woolson, described as the last surviving Union veteran of the Civil War, dies in Duluth at age 106. Woolson had enlisted in the First Minnesota Heavy Artillery when he was sixteen, serving as a drummer boy. He was the model for a bronze figure on the Memorial to the Grand Army of the Republic (GAR) at Gettysburg, although he did not fight there. Woolson moved to Duluth in 1905 and remained active in the GAR for decades.

A tornado with 110-mile-per-hour winds blows down St. Paul's High Bridge and kills fourteen in the Twin Cities and Stillwater.

The Reverend William T. Boutwell leaves La Pointe, Wisconsin, to begin his mission to the Pillager Ojibwe at Leech Lake.

A tornado sweeps through Dodge County, killing five, and then lands in Rochester, killing thirty-one. Mother Alfred Moes and the Sisters of St. Francis convert their school into an emergency hospital, with Dr. William Mayo supervising. Realizing the need for a permanent hospital in the city, Moes establishes St. Mary's Hospital on October 1, 1889. This facility would evolve into the Mayo Clinic.

The Beatles perform at Metropolitan Stadium to an estimated crowd of 4,000 teenagers, mostly young women, turning the event into what one writer described as "Shrieksville, USA." With the continued popularity of Beatles's recordings long after their breakup in 1970, the irony of early panning is shown in sharp relief by a Pioneer Press comment on the performance: "The Twin Cities was visited Saturday by some strange citizens from another world.

The Minnesota [Farmers'] Alliance and the Knights of Labor hold a conference to organize the Farm and Labor Party, nominating Ignatius Donnelly as their gubernatorial candidate. Donnelly, however, withdrew from the race, and the nascent party collapsed.

Governor Jesse "The Body" Ventura returns to his roots, refereeing a professional wrestling match at Target Center in Minneapolis.

Joseph R. Brown arrives at the site of Henderson, which he would name for his mother's family. Brown had been involved in various ventures, serving as a soldier, explorer, farmer, lumberman, legislator, and Indian agent in the early years of the territory.

Interurban streetcar service between St. Paul and Stillwater begins. The ride costs thirty cents and lasts about an hour and fifteen minutes.

Colonel Henry Leavenworth and the Fifth Infantry arrive in Mendota to build a fort at the confluence the Dakota call Bdote, where the Mnisota Wakpa (St. Peters/Minnesota River) intersects the Wakpa Tanka (Mississippi River). The following August, Colonel Josiah Snelling takes command of the fort, which is known as Fort St.

Minnesota's first post office is established at Fort Snelling.