When will the frost and fog appear?

1, first frost usually appears in the first frost in one of 24 solar terms,1October 23rd or 24th, 10;

Frost formation: there is a temperature difference between the air and the surface of the object. When the hot air comes into contact with the surface of a cold object, the air will become cold, and when the water vapor is supersaturated, the excess water vapor will precipitate. If the temperature is below zero, excess water vapor will condense into ice crystals on the surface of the object, which is frost.

2. Dew usually appears in the early morning of summer, from May to June;

Dew formation: Because the flowers, stones and other objects on the ground dissipate heat faster than air and the temperature is lower than air, when hot air comes into contact with these low-temperature objects, it will saturate and condense into small water droplets and stay on these objects, which is dew;

3. Fog usually appears between February and April in spring;

Fog formation: When the air near the ground is cooled to a certain extent under the conditions of sufficient moisture, breeze and stable atmosphere, the moisture in the air will condense into fine water droplets suspended in the air, which will reduce the visibility of the ground. This weather phenomenon is called fog.