The temperature drop during rain is not due to rain itself, but rather associated atmospheric conditions. Here are two main reasons why it can feel colder when it rains:
Evaporative Cooling: When it rains, the water droplets in the atmosphere evaporate. Evaporation is a process that requires energy, and it draws heat from the surrounding environment. As the rainwater evaporates, it absorbs heat energy from the air, causing a localized cooling effect. This can make you feel colder, especially if the air is already humid.
Cloud Cover: Rain is often accompanied by clouds. Clouds act as insulators, preventing heat from escaping into the atmosphere. They reflect a portion of the sun's energy back into space, reducing the amount of solar radiation reaching the ground. As a result, less solar heat reaches the surface during rainy conditions, leading to cooler temperatures.
It's important to note that the perception of coldness during rain can also be influenced by factors such as wind, humidity, and personal sensitivity to temperature changes.