Definition of humidex in English:

humidex

noun

Canadian
  • A measure indicating the level of discomfort the average person is thought to experience as a result of the combined effects of the temperature and humidity of the air.

    ‘the humidex in Ottawa was as high as 40 degrees Monday’

Origin

1960s: from humidity + index.

Pronunciation

humidex

/ˈhjuːmɪdɛks/