1. Robert is late as usual. It’s par for the course.
2. I asked for five different kinds of sandwiches at the cafeteria, and they didn’t have any of them. But that’s par for the course; they never have half the items listed on the menu.

Compare to: rule of thumb. The expression originates from the game of golf, in which par is the expected or usual number of strokes a player should take to get the ball from the tee into the hole on that particular course. The expression is usually used in a negative context, i. e. one couldn’t expect anything better.