Radioactive cooling water from the Monticello Nuclear Power Plant overflows its tank and eventually reaches the Mississippi River.

Super Value Groceries receives Minnesota's first shipment of air freighted vegetables. The cargo includes tomatoes, asparagus, figs, and avocados, and a special basket is given to Minneapolis Mayor Hubert H. Humphrey and Governor Edward J. Thye.

Two masked men rob Anoka's Monte Carlo casino. An article in the Anoka Herald reports that "the whole thing was carried out with good humor," although it was likely not humorous for the attendant who was shot twice by the robbers when he tried to escape.

The singing Hutchinson family of New Hampshire founds the town of Hutchinson in McLeod County. From 1841 until the close of the Civil War, the Hutchinsons toured the United States giving concerts of popular and patriotic songs.

Minnesota's first German-language newspaper, the Minnesota Deutsche Zeitung, is published in St. Paul by editors Friedrich Orthwein and Albert Wolff. It is the second non-English newspaper in Minnesota, the first being Dakota Tawaxitu Kin (Dakota Friend), published in English and Dakota by missionary Gideon H. Pond from 1850 to 1852.

The Frederick R. Weisman Art Museum at the University of Minnesota opens. Sculptor and architect Frank O. Gehry won an award from Progressive Architecture magazine in 1991 for his design of the building.

The Liberian freighter Socrates runs aground on Minnesota Point in Duluth. Excursion buses carry tourists to view the stranded ship, which is later freed by tugs.

The University of Minnesota's Green Hall, named in honor of forester Samuel B. Green, is dedicated.

Pilgrim Baptist Church is formally organized. The African American congregation, granted mission status by the First Baptist Church of St. Paul, met at various residences for a number of years before constructing a church at Thirteenth and Cedar Streets in St. Paul. Robert Hickman was ordained eleven years later and became the congregation's official pastor.

The state's first book-quality paper, manufactured at the Cutter and Secombe paper mill in St. Anthony, is used in the Minnesota Farmer and Gardener, an agricultural magazine.