Apparent Temperature¶
The Apparent Temperature (AT) is defined as the temperature giving the same discomfort as under the current ambient temperature and humidity.
The AT is based on a mathematical model of human body heat balance for an adult, walking outdoors in the shade.
Absolute humidity conforming with a dew point of 14 °C is chosen as a reference. If ambient humidity is:
- higher than the reference humidity level, the apparent temperature will be higher than the ambient temperature.
- lower than the reference humidity level, the apparent temperature will be lower than the ambient temperature.
More information:
- Steadman, R. G. A universal scale of apparent temperature. J Appl Meteorol Climatol 23(12), 1674–1687 (1984). https://doi.org/10.1175/1520-0450(1984)023%3C1674:AUSOAT%3E2.0.CO;2
- Australian Government Bureau of Meteorology. Thermal Comfort observations — About the formula for the apparent temperature. https://www.bom.gov.au/info/thermal_stress/#atapproximation
How to use¶
You need 2 m air temperature in Kelvin, 10 m wind speed in metres per second and relative humidity as a percentage.
It returns the apparent temperature in Kelvin.