Yes - when you look at a yeast package or recipe and it gives the fermentation temperature it is talking about the wort and not the ambient room temperature. Get a stick on thermometer and a regular room thermometer. Place the room thermometer next to your fermentor and see what your difference is. At my house it's about 4-6 degrees - a little higher in the summer. There are simple and easy ways to knock off a few degrees. If your beers are tasting pretty good now maybe lowering the fermentation temps by a few degrees will be the difference between good and great.