Fever medical second opinion
  • Sep 23,2021
  • By: Second Medic Expert

What is normal human body temperature?

The normal human body temperature range is typically interpreted as being between 36°C-37°C, with both being considered within the "normal" range.

What is normal human body temperature?

Normal human body temperature is usually 98.6 Fahrenheit or 37 Celsius.

Body temperature will be higher when the individual is hotter and lower when the individual is cold.  An infection can also increase a person's temperature. If an infection has been diagnosed it's best to speak with a doctor about any fever that lasts for more than 24 hours, is accompanied by or followed by shaking chills, or if it doesn't respond to home treatments for 48-72 hours in order to prevent complications from occurring.

Measurement of human body temperature is accomplished using a thermometer. There are several methods to do so, all but one of which rely on measuring the radiation that emerges from our bodies. Average normal human body temperature varies somewhat with the time of day and exact location on the Earth's surface. The following list shows average human body temperatures for different regions. The standard range for core (rectal) temperature typically ranges between 36-37 degrees C (97-98 degrees F). Temperatures outside this range should be investigated because they need treatment; fever or hyperthermia can be very harmful to humans because their brain functions slower than normal when these conditions happen, leading to various problems like lethargy, confusion, and sudden death.

The normal human body temperature varies from person to person and increases during puberty, pregnancy and menstruation in females. This increase in temperature is the result of the fluctuation of progesterone levels during these three hormonal changes. The normal heighten average normal body temperature for males is 37 degrees Celsius and for females it's always 0.4 degrees higher than that, at 37.4 degrees Celsius on average overall. “Normal" can also be defined as 98-100% of days when healthy people take their temp and it’s between 36 and 38 °C (97:5:102:10).

To find your body temperature, thoroughly wash and dry your hands, then insert your index or middle finger into the rectum with a light pressure against the anal verge.  You can also check axillary temperature by putting a thermometer under the arm pit and armpit for approximately 15 seconds to measure anything over "98.6."

Healthy humans have a normal body temperature of about 98.6 ?F (37?C). If you are cold, your body responds by increasing heat production with shivering, blood flow to the skin, and cutaneous vasoconstriction. If you are hot, your body cools itself by decreasing heat production with vasodilation of the skin and sweating. Increasing your heart rate is also one way to help increase body temperature in pets or people who are too cold - they use muscle contractions to generate more metabolic heat. What's most important is that if you feel abnormally cold for no good reason during the daytime - especially if it’s accompanied by extra shivering or chilliness.

A person's body temperature varies according to a number of factors, including their age, time of day and illness. Body temperatures from 97 to 100 degrees are generally considered feverish because they're higher than what's normal for that individual at that time of day. In adults, the average body temperature falls somewhere between 96 and 99 degrees at rest or during sleep times--it can slightly fluctuate depending on the person's age and whether their room has been heated by use of a heating pad or other means. But the reasonable range for a healthy adult female is typically 97-99 degrees which would be a normal resting temperature for them say around 8 am in the morning before food consumption or medication.


Normal human body temperature for an average adult lies in the range of 36-37 degrees Celsius, which corresponds to around 97 degrees Fahrenheit. A person's size can affect their body temp, men tend to have broader chests which will affect their core temp by a degree or two either way of the norm while women experience fluctuations due to normal hormonal variation, menstrual cycles and recent pregnancy.  The term "normal" doesn't mean "ideal". It's not okay for anyone to get fevers, but it is okay if people are warmer than usual because that means they are fighting some virus or bacteria. The accepted average normal body temperature is 98.6º F (37º C). A reading of 99.5º F (37.5º C) may indicate fever or virus, at least in adults older than 3 months of age.

A healthy person's temperature during the day is usually close to 37 degrees Celsius (98.6 degrees Fahrenheit).  One that is sick will most likely have a temperature of around 36 degrees Celsius (96.8 degrees Fahrenheit).  Decreased temperature often result in hypothermia, which can bring on death if not properly treated. Increased temperature can be caused by heatstroke or fever and can also lead to death if left untreated long enough.

The normal human body temperature range is typically interpreted as being between 36°C-37°C, with both being considered within the "normal" range. This slight difference is because of the conversion from Celsius to Fahrenheit degrees since 1 °Fahrenheit = 1.82 °Celsius degrees and vice versa. To convert a person's temperature from Celsius to Fahrenheit, use this formula:

Cause Of "Normal" Range For Biological Processes the cause of this measurement variation is quite different for measurements taken in humans and those taken in our cells (in vitro). Most cells we study under laboratory conditions are bathed continuously with mineral oil which keeps them warm and they don't drop.



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