While dressing up a Boxer puppy or dog can make him or her look super adorable, there are some valid reasons to put clothing on a Boxer. And if you're wondering if it normal or common for Boxer dogs to wear clothes, the answer is yes; this is why clothing big enough to fit Boxers and other large breeds is available and popular.
Though, one thing is for sure, a dog's ability to withstand harsh weather is
very overrated. While there are, of course, some arctic breeds that can stay outside for long periods of time, the Boxer -despite being big and strong - can tend to balk at certain weather conditions.
Each dog is very unique in regard to the line in the sand of how long they can stay out in the cold and what temperature they can deal with without losing too much body heat.
Young pups and seniors (age 8 years and up) are especially vulnerable to temps below freezing. And the wind chill factor should be included in this.
This does not mean that you need to spoil your Boxer and throw layers on him every time you head outside on less-than-perfect days.... however, if you assess the temps and weather conditions, you may find that placing a shirt, vest or coat on your Boxer can improve several aspects, from learning house training to keeping up with exercise requirements.