Weir along with his wife, Christina, who works as a second-grade teacher at Davidson Day, and their two children plan to move to New England to be closer to family.
"It's been a wonderful opportunity to work with such great people - the students, faculty, staff and parents," said Weir, who also serves as the Patriots' track and field coach, in a school release. "I know Davidson Day will be successful as it continues to grow and move forward in its athletics program."
Weir was hired at Davidson Day last May after a stint as associate dean of students at Leysin American School in Leysin, Switzerland. Weir served as an assistant track coach at UNC Charlotte in the 1990s.
Davidson Day also announced that it will undertake a national search for a new athletic director. Michael Smith, the head of Davidson Day's upper school, will serve as interim athletic director. He served in an AD position at Winston-Salem's Summit School for eight years. Catherine Fulton, a physical education teacher and the Patriots' volleyball coach, will serve as interim assistant athletic director.