Why is Mohe Arctic Village coldest in the morning?

It is located at the northern end of Daxing 'anling Mountains, closest to the Siberian cold pole, with the latitude of 53 29 north, which is the highest latitude in China, so it is called "Arctic Village" in China. Can you imagine how cold it will be in winter in Mohe Arctic Village? The historical extreme minimum temperature reached-52.3℃, and below-40℃ was common. If you stay outdoors for 10 minutes, your eyelashes will frost. Walking on the knee-high snow road in the morning, you will find that the snow on the surrounding roofs and eaves glows mysterious pale pink in the morning light. It is in this weather that you are lucky enough to see the ice fog. Ice fog is a unique natural phenomenon in Mohe, and it is a sign for people to identify extreme temperatures in extremely cold areas, which often occurs in extremely cold months. Generally, when the temperature is below minus 45℃, locals often call it "white smoke". Ice fog often appears at 6 ~ 7 in the morning, the air is dry and cold, there is no wind, and the sky in Wan Li is cloudless, and it lasts until noon 1 1. Visibility in the ice fog is extremely low, and no one can be seen beyond 10 meter. When the car is driving in the ice fog in broad daylight, you should turn on the headlights and drive slowly, and people will vomit and the export will turn into ice. Another feature of Mohe is rime, which appears in early winter and early spring. Rime usually forms at night, and the day after it is formed is generally warm and sunny. After sunrise, almost everything was shrouded in fog, and the scene was spectacular. Source: food and life