Is 36.8°C considered a Fever? Normal Body Temperature Explained
Medically Reviewed By
Dr. Mayanka Lodha Seth
Written By Sheena Mehta
on Aug 22, 2025
Last Edit Made By Sheena Mehta
on Aug 25, 2025
Ever looked at your thermometer, seen 36.8°C, and wondered, Is this okay, or am I getting sick?
It's a small number, but when it comes to your health, even a decimal point can make you pause. The truth is, body temperature isn't as fixed as we often think.
What we call "normal" can shift slightly based on how old you are, activity, time of day, and even the method of measurement.
In this blog, we will learn what 36.8°C really means, when you should actually be concerned, and how to understand your temperature reading.
What is the normal body temperature?
Traditionally, the normal human body's "normal" temperature is cited as 37°C (98.6°F). However, modern research has shown that the normal range is approximately 97°F to 99°F (36.1°C to 37.2°C). It can vary depending on several factors, including how the temperature is measured (oral, rectal, ear, or forehead).
This means that 36.8°C (98.2°F) falls within the normal range and is not considered a fever.
When is it considered a fever?
Fever is a body temperature rising above 38°C (100.4°F). Based on medical guidelines:
| Mild Fever | 37.5°C - 38°C (99.5°F -100.4°F) | Minor signs of infection |
| Moderate Fever | 38.1°C - 39°C (100.6°F - 102.2°F) | May signal bacterial infections. |
| High Fever | Above 39.1°C (102.4°F) | This may indicate a serious infection and requires medical supervision. |
Hence, a reading of 36.8°C is normal and is not considered a fever.
What causes variations in body temperature?
Factors that can cause variations in body temperature:
- Time of the day: One of the primary causes. Body temperature is lower in the early morning and higher in the evening.
- Age: Unlike younger adults, older adults have lower body temperatures.
- Physical activity: When you exercise, your muscles generate heat as they move, and internal heat increases your body temperature.
- Hormonal changes: In women, body temperature may increase during ovulation or menstruation.
- Method of measurement: Rectal readings are often higher than oral or underarm readings.
When should you worry?
You should be concerned about fever:
- If your temperature is above 38°C (100.4°F), it is considered a fever. It usually means your body is trying to fight an infection or sickness.
- Persistent fever over 39.5°C, especially with other symptoms, consult a doctor immediately. These may include:
- Chills or body aches
- Sweating
- Severe headache
- Body rashes
- Difficulty breathing
- Unusual fatigue
- Confusion
- Dehydration
Tips for Accurate Temperature Measurement
Below are simple tips to help you take accurate temperature measurements:
- Always take readings from a digital thermometer for better accuracy.
- Stick to one site like the mouth, armpit, ear, or rectum for consistency.
- Don't eat, drink, or work out for half an hour before measurements.
- Relax before checking your temperature.
- Make sure to clean the thermometer well after every use.
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Key Takeaway
36.8°C is not a fever; it is a normal temperature. The body temperature tends to change during the day; a single reading should always be interpreted in the context of other symptoms.
If you feel unwell, but your temperature is normal, check with your doctor for proper evaluation.
If you feel unwell despite having a normal temperature, it's best to consult a healthcare professional for proper evaluation.
FAQs
- Is 36.8°C a normal temperature for adults?
Yes. 36.8°C is considered normal temperature for adults as it falls within the normal range of 36.1°C to 37.2°C.
- Is 36.8°C a normal fever for children?
Yes. A normal body temperature for children falls between 97.7°F (36.5°C) and 99.5°F (37.5°C). They can have a slightly higher body temperature, and 36.8°C is entirely normal.
- Can 36.8°C be considered low?
No, as low body temperature generally starts below 35°C. It is within the healthy range.
- Why does body temperature fluctuate throughout the day?
A body follows a circadian rhythm, meaning temperature naturally lowers in the morning and is slightly higher in the afternoon or evening.
- My temperature is 36.8°C, but I feel unwell. Should I contact a doctor?
Yes. It is because sometimes symptoms appear without a fever. If you feel unwell and have other concerning signs, seek medical attention immediately.
- Why do older adults have lower body temperature?
It is due to slower metabolism, reduced muscle mass, and changes in their body's ability to regulate heat.
