Is this sunburn?

I keep the plant in a bay window so it gets north and east exposure, so not all day sun, but it does then get a few hours of west sun in the evening since the window has sun in all directions but south. I turn it somewhat regularly but the brown spots have just recently appeared on this leaf. Is it a sign I should move it?

I also have sometimes kept the window open which would have it get hit with wind/cold air which could also be an issue.