We get August rain once every couple of decades, so leave the ponchos at home. You shouldn't need a jacket either, unless you're someone who gets cold easily and are out either really early or really late. It might dip down into the sixties overnight, but it's been 80's and 90's around here during the afternoon. We had a friend visiting from out-of-state, so we were there at opening yesterday. Tanks, t's, and shorts were fine at 8am. Didn't stay late, but I doubt a sweater would be necessary before 10 or 11.