The average GPA at University of Dayton is 3.59. This makes University of Dayton Strongly Competitive for GPAs. (Most schools use a weighted GPA out of 4.0, though some report an unweighted GPA. With a GPA of 3.59, University of Dayton requires you to be around average in your high school class. You'll need a mix of A's and B's, and very few C's. If you took some AP or IB classes, this will help boost your weighted GPA and show your ability to take college classes.