Why is it not cold when it snows, but it will be cold when it melts?

When it comes to winter in the north, people always think of heavy snow, which also attracts many tourists from the south. However, the snowy weather is also very cold. Generally speaking, people seldom play outside on snowy days. When the snow stops, people will come out to enjoy the snow scene. Children will make snowmen and have snowball fights, and often have fun. Therefore, although many people don't like the cold wind in winter in the north, they will like the snow scene in winter. Therefore, the snow scene in some places will make many tourists linger, and even go all the way to experience the snow scene there. However, there is an old saying that it is not cold when it snows, but it is cold when it melts. Why on earth is this?

First, let's take a look. Why does it snow?

In fact, the process of snow is similar to that of rain. After the water on the ground evaporates, it becomes steam and rises into the air. When the air gets cold, it turns into rain. If the temperature is low in winter, steam will turn into snowflakes when it is cold. These snowflakes float down one after another, and people see the snow scene. The process of water vapor changing from gas to snowflake is actually an exothermic process, that is, the heat of water vapor will be released into the air when it becomes snowflake.

Second, the process of snow melting is actually an endothermic process.

? When snow melts, it needs to absorb heat in the process of changing from solid to water, and this heat comes from the surrounding air. That is to say, it needs to absorb the heat in the surrounding air in the process of melting snow, which means it will reduce the temperature of the surrounding air. This process is completely opposite to the above-mentioned process of forming snowflakes, which is why people feel that the process of melting snow will be colder than that of snowing. Although it is fun to play with snow after it snows, you should also keep warm and don't let yourself catch a cold because of the cold weather.