What is normal body temperature range?

Our temperature affects all aspects of our health. It is often referred to as our inner clock that keeps us asleep and keeps us awake. Our temperature rises and fall is the fourth sign in our body to produce feelings of arousal or fatigue. When your body temperature drops, you will begin to feel tired. So, as your body temperature rises, you will feel stronger and more alert.

Remember that your temperature rises and fall throughout the day depending on your activities and environment. It is not surprising that when we place great physical needs in us the body temperature will rise. It happens that when you stop a physical activity your body temperature will drop.

What is Normal Body Temperature for an average human?

You may have heard that the “normal” body temperature is 98.6 ° F (37 ° C). This number is only medium. Your body temperature may rise or lower.

High or low temperature reading does not mean you are sick. There are many factors that can affect your body temperature, including your age, gender, time of day, and level of activity.

Continue reading to find out more about healthy body temperature for babies, adults and adults above 65.

What is healthy body temperature? Is it same for all age persons?

Your body’s ability to regulate temperature changes as you grow older.

In general, older people have more difficulty retaining heat. They are more likely to have low body temperature. Body temperature based on different ages given below-

Babies and children: In babies and children, the average body temperature ranges from 97.9°F (36.6°C) to 99°F (37.2°C).

Adults: In the adults, average body temperature ranges from 97°F (36.1°C) to 99°F (37.2°C).

Adults above 65: In older adults, the average body temperature is lower than 98.6°F (37°C).

Always remember body temperature varies from person to person.

Many factors affecting your body temperature

Researchers have found that our bodies often become warmer during the day. As a result, the early morning fever is likely to occur at a lower temperature than during the day.

The time of day is not the only thing that can affect the temperature. As the above grades show, young people tend to have higher body temperature. This is because our ability to regulate body temperature decreases with age.

The level of physical activity and certain foods or beverages can also affect body temperature.

Women’s body temperature is also influenced by hormones, and can rise or fall in different areas during the menstrual cycle.

Besides, how you take your temperature can affect reading. Armpit reading can be more complete than oral reading.

And readings from the mouth are usually lower than readings from the ear.

What is Body Temperature Chart according to age and reading type?

Type of reading0–2 years3–10 years11–65 yearsOver 65 years
Oral95.9–99.5°F (35.5–37.5°C)95.9–99.5°F (35.5–37.5°C)97.6–99.6°F (36.4–37.6°C)96.4–98.5°F (35.8–36.9°C)
Rectal97.9–100.4°F (36.6–38°C)97.9–100.4°F (36.6–38°C)98.6–100.6°F (37.0–38.1°C)97.1–99.2°F (36.2–37.3°C)
Armpit94.5–99.1°F (34.7–37.3°C)96.6–98.0°F (35.9–36.7°C)95.3–98.4°F (35.2–36.9°C)96.0–97.4°F (35.6–36.3°C)
Ear97.5–100.4°F (36.4–38°C)97.0–100.0°F (36.1–37.8°C)96.6–99.7°F (35.9–37.6°C)96.4–99.5°F (35.8–37.5°C)

What is Fever body temperature?

Doctors consider a fever to be a body temperature that reaches or exceeds 100.4°F.

Symptoms of fever

  • chills
  • a headache
  • bitter taste
  • muscle aches
  • shivering
  • sweating
  • weakness

It is easy to assume that the fever is over 99 °, but temperatures are much lower. There are four levels: hypothermia, general, fever / hyperthermia, and hyperpyrexia.

Hypothermia occurs when the body temperature drops fast than the body can produce heat, resulting in a dangerous drop in temperature.

The average range (97 to 99 F) depends on the person and his or her activities.

Hyperthermia is a low-grade fever, which is typical of low-grade infectious diseases and adverse drug reactions.

Hyperpyrexia manifests itself as a high fever and is usually caused by cerebral hemorrhage, sepsis, or severe infection.

Fever can develop some body health issue

  • Infection: This is the most common cause of the flu. The infection can affect the whole body or one part of the body.
  • Medications: These include antibiotics, opioids, antihistamines, and many more. This is “drug fever.” Medications such as antibiotics increase direct body temperature. Some medicines keep the body from re-setting its temperature while other substances cause the temperature to rise.
  • Severe trauma or injury: These may include heart attack, stroke, fever, or fever.
  • Other medical conditions:  These include arthritis, hyperthyroidism, and even other cancers, such as leukemia and lung cancer.

When to call doctor?

  • You have a temperature over 103°F (39.4°C).
  • You’ve had a fever for more than 3 days straight.
  • If you have fever with –
  • vomiting
  • headache
  • chest pain
  • difficulty breathing

Call doctor if your child has fever and –

  • an unexplained rash
  • repeated vomiting and diarrhea
  • signs of dehydration


The ideal body temperature for adults is about 98.6 ° F, but this varies according to age, gender, physical activity, and health. Body temperature fluctuates throughout the day. Temperatures above 100.4 ° F show fever.

Children may have higher body temperatures than adults, but even a small fever in children can state a serious infection.

A study of the temperature taken from different parts of the body gives different body temperatures that doctors see as normal. Visual reading is higher than oral reading, and armpit reading is often reduced.

If a person has high or low temperature, they should seek medical attention immediately.

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