Often when you put a hand on your dog it feels warm, particularly on a patch of bare skin. This is because the normal body temperature of a dog is higher than that in people. Body temperature is maintained within a fairly narrow range (between 37.8°C (100°F) and 39.3°C (102.7°F)) although it varies slightly during the day, with lowest temperatures recorded in the morning and the highest in the evening. Fever is simply an increase in body temperature and can be seen with many disorders in dogs.