Holy crap, you keep your indoor temps at 78-80 degrees?
Anyway, I don't know what you mean by "comprismised", but installing storm windows will probably resolve that. You can get either interior or exterior storm windows, since it looks like you don't open that window anyway, it should be easy installing something to use as a storm window (you could even make your own out of Plexiglas).
As a quick fix, you could just put some of that plastic window film on the inside, you can find it in any hardware store or home center.
Anyway, I don't know what you mean by "comprismised", but installing storm windows will probably resolve that. You can get either interior or exterior storm windows, since it looks like you don't open that window anyway, it should be easy installing something to use as a storm window (you could even make your own out of Plexiglas).
As a quick fix, you could just put some of that plastic window film on the inside, you can find it in any hardware store or home center.