Sept-Dec are my busiest brew months. I try to mix it up, so I have some nice ales ready around the holidays, and some lagers stored in the cold garage most of the winter, to be ready for spring.
You might try Kaiser's Altbier. You can ferment mid 60'S, then lager it for a few weeks if you have a garage or somewhere cold to let it secondary. That's the last brew I did, and I can't wait till its done!
Like others have said, try a swamp cooler setup. Mine is a $4 storage bin from menards, filled with cool water with the fermentor parked inside. Keeps my brew right at 63 deg with no ice, with ambient temp at 68.
Hope this helps!