Is a body temp 96.6 okay after a fever?

No. A fever is when the core body temperaturerises above 37.5°C, and in Fahrenheit that is anything over 98.6 degrees Fahrenheit, which is considered normal. However, body temperature naturally varies from person to person. It can also vary according to the time of day and activity of a person. Most doctors don't get concerned about it until it reaches about 100 degrees Fahrenheit.