Why is there a huge difference between the weather forecast temperature and the somatosensory temperature?

First of all, we must be clear about the temperature. In meteorology, the physical quantity indicating the degree of air heat and cold is called air temperature, which is referred to as air temperature for short. The temperature reported in the weather forecast was measured on the thermometer in the louver box 1.5 meters above the ground of the observation site. Because the thermometer keeps good ventilation and avoids direct sunlight, it is representative.

Somatosensory temperature refers to the ambient temperature felt by the human body, which is often different from the actual temperature. Somatosensory temperature is actually a kind of feeling that people get physically or mentally when they contact with the external environment through skin, which is influenced by temperature, humidity, wind, solar radiation and other factors.