We all know that celebrities spend much of their public lives going from one chauffeured car to the next. But at times what they turn up wearing on the red carpet makes you wonder if they know where they are or what season it is. A gossamer-thin gown in New York in January? Not OK. Neither is velvet in L.A. in springtime.

Enter the art of site-specific dressing. It’s what separates the expert dressers from the amateurs. And with today’s global swirl of film festivals, premieres and events, it is more important than ever. Here is a selection of geographically appropriate looks from recent months. —Booth Moore