How cold is the winter in the north?

As far as temperature is concerned, the winter temperature distribution in my country is characterized by "hot in the south and cold in the north, with a large temperature difference between the north and the south". The winter season is generally December, January and February, while January is usually The coldest month of winter. If we look at the average temperature distribution in my country in January, we will find that the "Qinling-Huaihe River Line" in eastern my country is exactly the area where the 0°C isotherm passes, which means that the southern region south of the Qinling-Huaihe River has the coldest monthly average temperature in winter. The temperature is above 0℃, while the average temperature of the coldest month in winter in the northern regions is below 0℃. If we look at the temperature of a region in terms of temperature, the coldest monthly average temperature in the middle and lower reaches of the Yangtze River is about 4℃, the coldest monthly average temperature in Nanling is about 8℃, and the coldest monthly average temperature in the southern coastal areas is more than 12℃. ℃, is quite warm. In contrast, in the northern regions north of the Qinling Mountains and the Huaihe River, the coldest monthly average temperature in North China south of Beijing is within -8°C, while the coldest monthly average temperature in Inner Mongolia and Northeast China is below -12°C. Heilongjiang, the highest latitude, has the coldest monthly temperature in winter. The average temperature is below -20°C. The northernmost Arctic Village has the coldest monthly average temperature of -30.9°C. It can be said to be the coldest place in my country in winter. There are two reasons for the cold winter climate in northern my country. First, the direct sunlight point in winter is in the southern hemisphere. The farther north you go, the shorter the day, the lower the height of the sun at noon, and the less solar radiation you get. In addition, the northern region of my country is close to the "Asian High", the source of cold air in winter, and is very obviously affected by the cold air. The cooling is more severe, and the winter is cold, which further reflects the characteristics of my country's continental monsoon climate. The climate in the north is cold in winter, and many rivers and lakes freeze. The farther north you go, the longer the freezing period of rivers and lakes. For example, Beijing's Kunming Lake can be used for skating activities in winter. From the absolute temperature point of view, the winter temperature in the north is significantly lower than that in the south. However, in terms of life, people may have different feelings. From a natural point of view, the north is dry and cold, while the south is wet and cold; from a humanistic point of view You see, the northern region has central heating in winter, but the southern region does not have central heating in winter. Therefore, if you live in the north, the winter may be "cold outside and warm inside the house"; while if you live in the south, the winter may be "cold outside but cool inside the house."