It is not entirely accurate to say that when a dog sneezes, it means it will rain. Dogs are more sensitive to changes in the weather. When the weather gets cooler, dogs will sneeze. It does not necessarily mean that it will rain. Sneezing, so this statement is unscientific. If your dog sneezes, you need to pay attention to keeping the dog warm to prevent the dog from catching a cold, especially during the change of seasons.