Wow troutman, your water temp is much cooler than mine. I am already at 67.6 water temp at 2 foot deep.
My trout did really well last year even though it was a hot summer. I lost 2 foot of water to evaporation during the summer, so I only had 10 foot of water during july and august. I just cut back a bunch on the airating and somehow they made it. good luck.