How many months does the cold air last this year?

April 2023. According to the query of China Meteorological Bureau, there will be cold air in April 2023, and there will be cooling weather in some areas. Cold air reappears from the end of March to the beginning of April. The lowest temperature is about 15℃, and the body feels cool. Cold air refers to the air whose temperature drops. Cold air and warm air are defined by the horizontal difference of temperature. The distant Arctic Ocean and cold Siberia are the cradles of cold air. Most cold air masses are formed in the polar regions and Siberia, with a range of thousands of kilometers and a thickness of several kilometers to dozens of kilometers.