It will vary from child to child. It also can vary depending on what time you take the temperature, and what type of thermometer you use. Also the more physically active your child is, the higher his or her body temperature is likely to be. Fever is merely a symptom of illness. To understand that, first we should look at exactly what happens in the body to make the temperature rise.
Pyrogens act in the brain to reset the body's thermostat to a higher temperature than normal.
The main way the body conserves heat is by constricting the blood vessels in the skin, the body's primary cooling control system. That's why the skin often feels hot and dry. A very common result of this is the chills, which is just another way the body warms itself when it thinks it needs to. Most children's fevers are caused by infection from common viruses. And because children's immune systems haven't had a chance to develop fully, small children are more likely to get infections.