Sometimes it is cold but the windchill is not on the webpage, the same thing in the summer when the humidex isn on all the time, why not?
Although we use the standard Environment Canada formulas for calculating windchill and humidex, it is a judgment call whether or not to report these values. For instance, if the wind speed is below about 4 km/h the windchill equivalent temperature (WET) is actually higher than the actual temperature. We have decided to report windchill if the WET is less than the actual temperature and the WET is less than zero degrees Celsius. The criterion for humidex is to report it if the humidex is greater than 2 degrees above the actual temperature and the humidex temperature is above 20 degrees Celsius.
