Try a nice cold hefeweiss-Weihenstephaner, Paulaner or Schneider- w/ or w/o lemon slice (purists say it kills the flavor, I like it on occasion). Ahhhh, now that's refreshment. Unfortunately, been stuck between 10-20 degrees lately, so that day seems a bit far off. Contrary to conventional wisdom, a good dark beer is really enjoyable on a hot day, in my opinion. A dunkel hefeweisse, or a Belgian dubbel.