The humidex is Canada answer to the heat index, a single number that describes how hot humid weather actually feels by combining the air temperature with the moisture in the air. It is issued by Environment Canada during summer and is the standard comfort measure across the country. Unlike the American heat index, the humidex is built from the air temperature and the dew point rather than the relative humidity, using the vapor pressure of water to add a humidity dependent bump to the temperature. This calculator applies the official Environment Canada formula, so the results match published advisories. Enter the air temperature and the dew point, choose Celsius or Fahrenheit, and read the humidex value along with the comfort category, which ranges from no discomfort in the twenties to dangerous above forty five. It is handy for anyone north of the border or comparing comfort scales. Everything runs locally in your browser for instant, private results.
The humidex is Canada answer to the heat index, a single number that describes how hot humid weather actually feels by combining the air temperature with the moisture in the air. It is issued by Environment Canada during summer and is the standard comfort measure across the country.
Yes. Humidex Calculator is completely free, with no sign-up and no usage limits.
Yes. Humidex Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Humidex Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.