Humidex

The Humidex is an index that describes how hot or humid weather feels to the average person. It is only used when the temperature is over 30 degrees Celsius. The humidex combines the temperature and humidity into one number. A humidex of 40 with a temperature of 30 degrees means that the humidity on that day, combined with the 30 degree temperature, will feel like 40 degrees on a dry day.