What is the normal human body tempurature?

The average human body temperature is 98.6º F or 37º C, but it can vary somewhat. Older people average a bit less. These values can also vary with time of day.

This means that illness may be present, especially in older adults, even when the temperature appears to be within the normal range. It is important for some to establish baseline values on an individual basis, since significant variations from the norm can occur in some individuals.
13oC
Average 98.6deg F, 37deg C

Average body temperature is 98.6 F