The Komondor's coat is a thick mass of curly cords that protect it in cold as well as hot, dry, weather. If the weather is humid or the coat gets wet, however, then the coat takes a long time to dry and can cause irritation to the skin. If the coat isn't fully grown in or in bad shape, the combination of heat, humidity, and skin irritation can cause hot spots or lesions on the skin. These will need to be treated and healed. Hot, humid weather can also result in an increase in fleas and ticks that will hide within the deep fur of the dog.
Some owners will shear or trim the underside of a dog to help provide some relief in hot weather. This is not necessary with an adult Komondor unless it has some hot spots that need to be aired out for healing. You may see skin problems during hot, humid weather more than during cold months, but don't take that to mean that this is the cause. Instead, take the dog to your local veterinarian to get a good diagnosis. They may put the dog on antibiotics, shear the underbelly, or hand out ointments or tinctures to put on the hot spots. Since hot spots are itchy, when you bathe the dog you can try using some anti-itch products like Aveeno soap in the bath to help provide some comfort during the hot season.
You have to be very aggressive about treating fleas in hot, humid weather. They will proliferate and can bring disease and parasites to your dog and your family. Don't just treat the dog and the house. You will also need to treat the yard as most Komondorok are outside dogs. Just make sure that whatever products you use, that your dog is not sensitive to them. Otherwise, the combination of the pesticides, the hot and humid weather, and the fleabites can end up giving your dog more skin problems. You might want to seek out natural means of flea yard control like nematodes or cedar chips.
Young puppies can be sensitive to the heat because their coats have not grown in as much. Make sure to keep them hydrated and away from the harsh temperatures of the mid-afternoon sun. If you are traveling, be sure to take this into account. Do not transport Komondorok during hot, humid weather, especially if they are puppies. Try to do that during the early hours of the morning or later at night, when things have cooled down a bit. By keeping the dog clean and pest-free, you can eliminate many of the problems that result from dry humid weather. And always be sure to check with your veterinarian should skin problems become more prevalent during these months.