When will it hail? Is hail usually in winter or summer? How is it formed?

In summer, the weather is hot and the sun is scorching the earth, which is easy to produce a lot of hot and humid air near the ground. Hot and humid air rises rapidly and the temperature drops sharply, sometimes even as low as -30℃. The water vapor in the hot air condenses into water droplets and quickly freezes to form small ice beads. Small ice beads roll up and down in the clouds, constantly adhering and condensing the surrounding water droplets into ice, getting heavier and heavier, and finally falling from the sky, which is hail. Hail can only be produced when the hot and humid airflow rises strongly. It is estimated that the rising speed of air flow must exceed 20 meters per second. So hail mostly occurs in summer. In winter, the temperature near the ground is very low, so it is impossible to produce strong and rapid updraft, so it is impossible to form hail. Hail is very harmful. It destroys crops and hurts houses.