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revised July 26, 2007

Heat and Humidity

Arrow BulletWhat is the Humidex?

thermometerThe Humidex combines air temperature and relative humidity to tell us how hot it feels. 

It may help to think of the Humidex like you would the wind-chill index in winter.  Wind chill combines the air temperature with the wind speed to determine how cold it feels.

weather reporter

Guide to Summer Comfort

Range of Humidex

Degree of Comfort

Less than 29 Celsius

No discomfort

30 to 39 Celsius

Some discomfort

40 to 45 Celsius

Great discomfort; avoid exertion

Above 45 Celsius


Above 54 Celsius

Heat stroke imminent

Source: National Centre for Environmental Health.


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Revised: July 26, 2007


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