![]() As such, depending on how significantly these assumptions vary from the reality of an individual, heat index estimates may not accurately reflect the perceived temperature. Like the Wind Chill Temperature Index, the heat index used by the National Weather Service (NWS) in the United States is based on many assumptions such as body mass, height, clothing, individual physical activity, blood thickness, and wind speed. This perception of heat is what the heat index seeks to measure, and while it can technically be used indoors, it is most often used in reference to the outside temperature. The lower rate of evaporation subsequently lowers the rate at which the body cools, increasing the perception of heat. The human body cools itself through perspiration, where heat is removed from the body as a result of the evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the rate of evaporation of sweat. The perception of heat is subjective, and can be affected by various factors such as menopause, pregnancy, and the effects of drugs or withdrawal, as well as differences in hydration, body shape, and metabolism. This difference in perceived and actual temperature is the result of a mixture of air temperature, relative humidity, and wind speed. For example, an air temperature of 83☏ with a relative humidity of 70% would result in an estimated 88☏ perceived temperature. Heat index is often referred to as humiture, and is similar to wind chill in its attempt to measure the perceived rather than the actual temperature. Related Wind Chill Calculator | Dew Point Calculator We wish you to stay healthy, and in cases when you do need to take a measurement and the only thermometer you have is not marked in the units you like, here is a chart that should help.Use Dew Point Temperature Air Temperature To summarize, the message we would like you to keep in mind is that the "normal body temperature" is more of a range rather than a well-defined number, and it should be relied on with reasonable flexibility. For example, oral and under the arm readings commonly differ (oral being higher), and fast digital thermometer readings may not always be as accurate as longer liquid column thermometer measurements.ĭigital thermometer Liquid column thermometer ![]() There are also subjective factors, such as the way body temperature is being measured, the instrument (thermometer) type being used, etc. All of these aspects can easily make one's temperature fluctuate within one or two degrees. Some objective factors affecting our body temperature include the time of day (with the lowest temperature in the morning and the highest typically around mid-afternoon), recent exercise (you get hot after a long run for instance), a recent meal, warm and/or alcoholic drinks, etc. At least some of those factors should be taken into account when reaching conclusions about whether one's body temperature is normal. What is "normal" depends on various factors, both objective and subjective. It is important to realize however that the 37 Celsius (or 98.6 Fahrenheit) value is essentially an averaged benchmark. For the Fahrenheit folks, you may know it as 98.6 ☏ (as you can easily verify using our online converter). Indeed, a normal body temperature of a healthy person is in the vicinity of 37 degrees Celsius, which makes this value so special and important. If you are used to the Celsius scale, you recognize it immediately. ![]() 37 Celsius: Body temperature measurement and unit conversions Body temperature in different unitsģ7 ☌ is a value that one encounters probably more often than any other temperature reading. ![]()
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