When it's hot outside, I prefer light-colored teas and tisanes (I drink them both hot and iced!).
I recently brewed a pot of fresh-mint herbal "tea". I picked a handful of mint leaves growing outside my back door, rinsed, and poured boiling water over them. I steeped the brew until I thought it had the right amount of mintiness. It was delicious and oh-so-pretty in the glass teapot.