Why does the temperature drop when snow melts?

It snowed because of the low temperature. When it snows, the low temperature brought by snow will not have a great impact on the surrounding air, so we will not feel too cold. When melting, snow melts from solid to water, and the original low temperature will enter the air, reducing the temperature of the surrounding air, so we will obviously feel that the surrounding temperature environment is colder.

When it snows, the temperature of the weather is already below 0℃. The temperature is low after snow, because the melting of snow needs to absorb a lot of heat around it to make snow melt into water. Changing from a solid state to a liquid state needs to absorb the surrounding heat, resulting in a drop in the surrounding temperature. There is still a strong wind when the snow melts, so I feel very cold and the temperature is very low. When it snows, the air humidity is low and dry, which makes the air and clothes keep warm better, while when it snows, the air humidity is high and the air heat transfer is strong, which makes people feel cold. So the temperature is very low for several days after it snows.

But it's different after the snow. At this time, the snow is melting, and melting needs to absorb external heat. When people stand in the snow, the surrounding snow will naturally absorb heat from this high-calorie object. The higher the heat, the faster and more heat will be absorbed. At this time, people will feel very cold, and it will be very cold. As far as a snow is concerned, it is, of course, "it is not cold when it snows." If it snows in spring, it will definitely not be as cold as when it snows! Personally, I don't think it will be very cold when it snows, because it snows heavily, and it will only be cold when the wind blows when it stops. After the snow stops, the dust mixed in the snow will be fine if the body is not coordinated.

From junior high school physics, we can know that liquid water will give off heat when it becomes solid (ice or snowflake) under normal pressure, and will absorb heat when ice or snowflake melts, so snow will absorb heat from the environment when it melts. Assuming that the ambient temperature is not affected by other factors when snow melts, people will feel colder than when it snows, because snow melts and absorbs heat.