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[Weather Tips: Why is it colder on a windy day?] When there is no wind or breeze, a transition layer is formed between the person and the surrounding air and acts as a heat insulator, and warm clothes will also lock in the air and reduce the convection to carry away heat. If the cold air is accompanied by strong winds, the air insulation around the human body will be constantly replaced by new cold air, taking away the heat. The higher the wind speed, the faster and more heat is lost by the human body, and the more cold the person feels. Experiments show that when the temperature is greater than 0°C, the perceived temperature decreases by 3~5°C for every 2 levels of wind increase. When the air temperature is less than 0 °C, the temperature will drop by 6~8 °C for every 2 levels of wind increase.

Breaking the code