The Canadian born keeper has done well for Minnesota United and it will be interesting to see if the 22-year-old can impress Villa during the trial.
The Athletic are claiming that he will train with the Premier League club for two weeks.
Dean Smith has a host of options in the goalkeeping department but Jed Steer is currently out injured and Lovre Kalinic is expected to leave the club in January.
If that happens, Villa might be in the market for a new backup keeper.
St. Clair might prove to be a decent addition for a reasonable price.