Why does hail appear in hot weather in summer?
Hail is small water droplets in the atmosphere that flow to high altitudes through the atmosphere and condense into small ice crystals.
Due to the up and down disturbance of the atmosphere, small ice crystals sink and turn into water droplets. Different water droplets gather together and then float up to form larger ice crystals. This is how small hailstones grow.
On average, for every 100 meters the atmospheric temperature rises, the temperature drops by 0.6 degrees. In areas where clouds and rain form, the temperature is usually below zero, so often the rain you see is ice crystals in the high-altitude atmosphere. During the falling process, the temperature rises and melts into rain water, and those "grown" ice crystals are still there. Hail falls to the ground before it completely melts.
The air is strongly unstable and is most likely to occur in warm and humid seasons when the sun is strong. At that time, there was plenty of moisture in the air, and the lower atmosphere was heated by the sun-heated ground. A very unstable air column with cold top and hot bottom is formed, causing strong convection. Develops into cumulonimbus clouds that produce hail. Secondly, the strong airflow in this cloud is enough to support the formation of hailstones. This allows the initial hailstones to slowly combine with rain, snow, small water droplets, etc. to increase in size. When it reaches a certain level, it will begin to fall because the airflow cannot support it, forming a hail rain.
The weather in summer is hot and the thermal conditions are good, so thermal convection is easy to occur. When the thermal convection cloud reaches a certain height, the water vapor in the cloud condenses into ice beads when it condenses, forming hail. However, the possibility of frequent hailstorms is not high. Small ice droplets roll up and down in the clouds, constantly absorbing the surrounding water droplets and condensing into ice, becoming heavier and heavier, and finally falling from the sky. This is hail.