If you’re looking for a medium finish, you should pull your steaks off the griddle once they reach 130 - 135 degrees F. While the steaks rest, the internal temperature will rise to 140 - 145 degrees F.  For a medium rare finish, pull the steaks off of the griddle once the internal temperature reaches 120 - 125 degrees F. When checking a steak's internal temp, measure it in the thickest part of the steak.