apparent temperature means a combination of
Apparent temperature is the general term for the perceived outdoor temperature, caused by the combined effects of air temperature, relative humidity and wind speed.1  The heat index and humidex measure the effect of humidity on the perception of temperature. The heat index and humidex measure the effect of humidity on the perception of temperature. 2  In humid conditions, the air feels hotter than it actually is, because of the reduction in evaporation of perspiration.