"Humidex" Natural Recordings by Native Speakers
The Humidex is a measure of how hot it actually feels outside, taking into account both the temperature and the humidity. It is a scale that combines the effects of heat and humidity to provide a more accurate assessment of how hot it feels to the human body. A high Humidex reading, typically above 30, can make it feel even hotter than the actual temperature, as the air is more saturated with moisture.
The verb "humidifies" means to make something, especially the air or an atmosphere, more humid, or to add moisture to it in a controlled way.