It is a common saying in Buenos Aires region (Argentina). It was especially true during the last days, when temperatures raised 40 Celcius degrees. 

Here, the local forecasts sometimes inform about the real temperature, as well as the thermal sensation. It is referred to the warm or cold people really feel. Humidity changes greatly thermal sensation in respect to real temperature, during hot days as well during the colds. For instance, last days It was informed: real temperature 40 °C, and thermal sensation 47 °C. During winter, cold and heavy wind diminish the thermal sensation as well.