Which weather is colder, frost, snow or rain?

1, frost is a phenomenon that water vapor (i.e. gaseous water) condenses at a very low temperature, which is very similar to snow. On cold winter mornings, outdoor plants usually frost. This is because plants dissipate heat slowly at night, the ground temperature is particularly low, and the water vapor is not emitted quickly. When it gathers on the surface of plants, it freezes and forms frost. Scientifically speaking, frost is made up of ice crystals, similar to dew. When the relative humidity in the air reaches 100%, water is separated from the air. The only difference between the two is that the dew point (the temperature at which water vapor liquefies into dew) is higher than the freezing point, while the frost point (the temperature at which water vapor condenses into frost) is lower than the freezing point, so frost will only appear when the temperature near the surface is below zero degrees Celsius. (The temperature is about 0 degrees Celsius, and the climate temperature difference is large)

2. Snow is precipitation composed of a large number of white opaque ice crystals (snow crystals) and their polymers (snow masses). 1949 held a special international conference, at which the proposal of "concise classification of atmospheric solid precipitation" was adopted. This concise classification divides atmospheric solid precipitation into ten types: snowflake, star snowflake, columnar snowflake, needle snowflake, multi-branch snowflake, axial snowflake, irregular snowflake, graupel, ice particle and hail. The first seven kinds are collectively called snow. (including hail, it can be any climate temperature in the world, of course, the climate below zero is more common)

Rain is water drops falling from the clouds. Water on land and sea surface evaporates into water vapor. Water vapor rises to a certain height and turns into water droplets when it is cold. These small water droplets form clouds. They collide with each other in the cloud and merge into large water droplets. When it is too big for the air, it will fall from the clouds and form rain. (Climate above 0 degrees Celsius is acceptable)

Therefore, it can be concluded that it is colder in snowy days.