Dogs vary greatly  in their tolerance to cold whether depending on their breed, health, condition, length of coat,  size, age and overall fitness. During typical winter days, we need to use common sense when determining whether it is safe for a dog to be outdoors.  We need to consider more than just temperature and should take into account other factors including wind chill, whether the ground is frozen or if sun is shining. We also need to consider the type of dog breed, its age and health, length of coat, size and overall fitness level. Deciding when and for how long you should have a dog outdoors for exercise and play should be based on the following guidelines and your best professional judgment after considering all pertinent factors.