During the 2009-10 school year, there were a total of 73 students attending classes in Wengi. There was one kindergarten class with a total of 14 students in the municipality. Of the kindergarten students, 14.3% were permanent or temporary residents of Switzerland (not citizens) and 14.3% have a different mother language than the classroom language. The municipality had 3 primary classes and 59 students. Of the primary students, 6.8% were permanent or temporary residents of Switzerland (not citizens) and 3.4% have a different mother language than the classroom language.