Widmer earned a BA from Goshen College, Goshen, Indiana (1967), and an MFA from the School of the Art Institute of Chicago (1973).
She has been assistant professor of art at the University of Northern Iowa, Cedar Falls, since 1976, and previously taught at the University of Illinois, Champaign/Urbana (1972-74). She won an NEA Photographer's Fellowship in 1980 and 1975. Her large hand-colored photographs sometimes include writing and drawing.
A member of SPE.