The Nittany Lions were the first Big Ten team to defeat Michigan this season.
The Nittany Lions dropped three straight sets in the loss.
The Nittany Lions lost their chance to win the Big Ten regular-season title following the Badgers' 82nd-minute goal.
The drop comes after the Nittany Lions' 20-12 defeat by the Buckeyes in Columbus.
Sophia Gladieux's brace lifted the Nittany Lions over the top-five-ranked Hawkeyes.