It is generally colder after a hail-storm than during and before the hail-storm. Give reason.

Hint: There is a large amount of heat present in the atmosphere. A hailstorm is unusual weather where small ice balls fall from the sky. The heat of the surrounding is absorbed by the ice balls that fall from the sky.

Complete answer:
When the hailstorm occurs the small ice balls fall from the sky. The temperature of the surrounding is higher than that of the ice balls. Therefore when the ice balls from the sky it absorbs the heat from the surrounding which causes the temperature to decrease and we feel cold. Ice balls absorb the heat energy from the surrounding which is required to melt the ice from the surrounding.
Evaporation takes away the energy from the atmosphere which results in fall of temperature.

Additional information:
Evaporation is a process of converting water into vapor. It causes the state of liquid to gas. Evaporation provides moisture and helps to keep the air moist. It also helps to keep our body cool. Evaporation has various applications such as ironing clothes, in preparing common salt, in nail paint removers, cooling hot liquids, drying of hair and different water bodies. It plays an important role in distillation.

Note:
Hailstorms don't occur normally. Several conditions are required for a hailstorm to occur. When the thunderstorm reaches a certain height, strong current of air ascends the clouds. This air contains ice particles at low temperature. The last condition will be the clouds need to have high concentration of supercooled liquid water.