Question

Why does a summer rainstorm lower the temperature?

Answer 1

Hint: The movement of air across planet earth is dependent on the air pressure and humidity of different regions and the distance that the air covers during its movement. All these factors together regulate the temperature, humidity and air pressure of other regions. The movement of air is called air current and when these currents increase in velocity, they form winds and storms.

Complete answer:
During the summer season, the temperature of the air rises rapidly. When the temperature of any matter increases, its density and pressure tend to decrease. Similarly, the air in the hot region becomes rarer, rises up and creates a region of low pressure. The air that rises up is also rich in moisture. The cooler or colder air in the neighbouring areas has a relatively higher pressure than the area having a higher temperature. This generates a pressure difference between the air in that region and the air from the neighbouring region.

Therefore, cold air rushes into the low-pressure region at very high speeds. These winds at high speeds take the form of storms. These winds along with them, carry moisture and clouds. These clouds and moisture then add to the humidity that was already in that region. The cold air that rushes in brings down the temperature of the hot region. Due to this sudden change in temperature, the moisture that rises above the hot region condenses rapidly and falls down as rain. This precipitation further drops the temperature and this leads to even more condensation and therefore, more precipitation.

This process of moving cold air into a low-pressure region followed by condensation and precipitation is what gives rise to the rainstorm. This entire process of the formation of a rainstorm is in itself the main cause for the lowering of the temperature of a hot region during the summer season.

Note: When the air moves from a high-pressure region to a low-pressure region that is very close to each other, the path that the air takes is more or less straight. This is due to the short distance. When these regions are farther, the path of the moving air is no longer straight. It is slightly curved. In addition to that, the rotation of the earth starts having a significant effect on it. Thus, in such cases, the rainstorms take the form of a cyclone, twister or tornado.