I want to know why the rain is cold.
The temperature of rain is generally influenced by the temperature of the surrounding air. Raindrops can become cold if they form in a cool or cold air mass. However, it's important to note that raindrops themselves don't have a specific temperature - they take on the temperature of the air through which they fall.
To understand why rain might feel cold, we need to consider the process of evaporation. When raindrops fall through the atmosphere, they can encounter air of different temperatures. If the air is cooler than the raindrops, the air absorbs the heat from the raindrops through evaporation. As a result, the raindrops may lose some of their heat, making them feel cold when they come into contact with your skin.
Now, to determine the specific temperature of the rain, you would need to measure the air temperature and compare it to the temperature of the raindrops. You can use a thermometer to measure the air temperature by placing it outside in an area where it's not directly influenced by a heat source or sunlight. To measure the temperature of the raindrops themselves, you would need to collect a sample and use a thermometer or temperature probe to measure its temperature.
However, in everyday situations, people usually perceive rain as cold because it often falls from clouds that are higher up in the atmosphere where temperatures are generally cooler than at ground level. This contrast in temperature between the cooler rain and your relatively warmer body is what gives the sensation of rain feeling cold.