[2] He attended school at the Cologne Academy of Fine and Applied Arts (also known as Kölner Werkschulen) starting in 1920, where he studied architecture with Martin Elsaesser and Robert Seuffert.
[4][5] In 1923, he attended one semester at Bauhaus in Weimar,[5] where he studied with Paul Klee, Wassily Kandinsky, László Moholy-Nagy, Lyonel Feininger, and Oskar Schlemmer.
[2] After graduation in 1931, Weighardt moved to Paris and married Nelli Bar, an artist he met when he studied in Cologne.
[2] In 1950, he started teaching in the architecture department at the Illinois Institute of Technology (IIT) by invitation of Mies van der Rohe.
[2] His students included Robert Indiana,[2] Fay Peck,[6] Claes Oldenburg,[7] Leon Golub,[8] H. C. Westermann,[2] Richard Hunt,[2] Irving Petlin,[2] Arthur Okamura,[2] Marion Lerner-Levine,[5] Mary Gehr,[5] among others.