Apparent Temperature
Was developed by Steadman,(1984) to describe the thermal comfort/resistance of an average adult walking when they are exposed to certain combination of temperatures, relative humidity’s and wind speed.
The method used here follows the Apparent Temperature method used by the Australian Bureau of Meteorology and Blazejczyk et al. (2011)
Apparent temperature is similar to the Heat Index methods also available to calculate in thermofeel
More Information:
How To Use
You need 2m temperature in Kelvin, 10m wind speed in m/s and, optionally, relative humidity such as water vapour pressure (because this can be calculated from 2m temperature). The wind speed in this method is converted to 2 meters as an approximation of 1.2 meter wind speed.
It returns the apparent temperature in Kelvin
calculate_apparent_temperature(2m_temperature, 10m_wind_speed, relative_humidity)
Interpret the Output
Here is a suggested way for you to interpret apparent temperature outputs, it is by no means the only way to go about defining thermal stress.
Apparent Temperature Range °C |
Effect on Body |
|---|---|
27-32 |
Fatigue possible with prolonged exposure and/or physical activity |
32-39 |
Heat stroke, heat cramps, or heat exhaustion possible with prolonged exposure and/or physical activity |
39-51 |
Heat cramps or heat exhaustion likely, and heat stroke possible with prolonged exposure and/or physical activity |
51< |
Heat stroke highly likely |