It's going to make your beer taste not as good as it could be. Will it taste "bad"? Probably not bad, but there may be something going on in there. High fermentation temp will yield some more fruity flavors and esters than a low and steady fermentation would. If it's really bad you might get some hotter alcohol notes but that tends to happen with the bigger gravity brews.
Overall, you'll be ok. Do some budgeting and think about a fermentation freezer or fridge. If that's not in the cards look up swamp cooler information to help keep fermentation temps in line.