A generic term used to cover a range of biometeorological indices that estimate an individual’s perceived temperature, based upon the air temperature and humidity and/or wind speed. It represents how the climate “feels” to the human body (Robinson 2001). The term was put forwards by Steadman (1979). Examples of apparent temperature indices include: the Heat Index (HI), the Heat Stress Index (HSI), Humidex, Wet Bulb Globe Temperature (WBGT), Universal Thermal Climate Index (UTCI), the Steadman Apparent Temperature Index and the New Wind Chill Equivalent Temperature (WCET) index. While the term “apparent temperature” is generic, it should be noted that some studies refer to the Steadman Apparent Temperature Index and the HI as the “apparent temperature”.