We live in LA and have a mini schnauzer. We bought him from a breeder out near Houma. Great dogs, even better if you train them properly. Make sure to socialize them well with other dogs and people as part of training.
We do not leave him out long in the summer, but he seems fine with the heat all the same. Schnauzers have a different coat than most dogs but do not shed and are not very high maintenance. You'll have to groom them enough to prevent matting though.