Why is it warm when it snows and cold when it melts?

Snow, sleet or snow showers are a natural phenomenon, similar to rain but it is a rain of small ice crystals.

Snow often occurs in temperate regions in winter.

Winter is a time of cold everywhere. The cold is caused by cold, dry air currents from the North rushing down to the South. When the front of the cold wind meets the warm, humid air from the South, because the cold air is heavier than the warm air, it often pushes the warm, humid air up, causing the water vapor in the warm air to quickly condense into ice, gradually increasing to snowfall.

Before the cold air arrives, the warm and humid air from the South is generally very strong, so the weather is warm. When the water vapor condenses into snow, it also releases a certain amount of heat, making the weather before and during the snowfall not so cold.

When the center of the cold air current passes, the clouds melt and the snow stops, the weather immediately clears up because the sky loses its cloud cover, the ground will diffuse a large amount of heat to the outside, at that time the temperature drops very low. Based on experiments, 1 gram of ice at 0°C when melted into water at 0°C will absorb 334.4 J of heat (equivalent to 80 calories), so when a lot of snow melts, the amount of heat absorbed will be very large, so people feel the weather is colder .