I've lived in Tucson for almost 7 years now and I've seen almost every kind of dog here. Summer months can be rough, dogs should be kept indoors and it's best to take walks early in the morning and at around dusk when the weather is much cooler. The nice thing about Tucson is that if you are looking to go hiking or camping with your dog it's just a short drive up the mountain to get to cooler weather which will be more comfortable for both you and your dog.