I was even more amazed when we went out to the patio dining area it was at least 30 degrees cooler than the outside temperature. In fact, the patio dining area was a more comfortable temperature than the inside dining area. About that time, the big box stores started carrying a misting system that was a lot less expensive (also known as cheap). These systems cost less than $200, so we got one for our patio. discount outdoor wicker furniture I hooked the system into my sprinkler system so that I would have a ready water supply and switched it on. It worked, the patio temperature dropped about 10 to 15 degrees, getting the air temperature down to about 80 degrees.