| | Conditions Treatments | Altitude Sickness What does 97.8 body temperature mean? A body temperature of 97.8 degrees Fahrenheit is considered slightly below average. The average human body temperature is 98.6 degrees Fahrenheit. Altitude Sickness - Related Articles Alzheimer Remedies Healing Power of Color Carbohydrate Specific Diet for Leaky Gut Syndrome What Determines the Chemical Structure of an Atom? Can excessive alcohol intake cause internal bleeding? Help With Severe Depression Symptoms How many people on average die of drownding?