Does foggy weather mean cooling down?

Fog is a sign of temperature change in the past, and it has no obvious indication of whether it will cool down in the future.

There are generally two kinds of foggy days, radiation cooling and advection cooling.

Radiation cooling is similar to the process of cooling red-hot iron blocks to room temperature.

When the temperature is high during the day and there is no cloud at night, the air near the ground will gradually release heat and cool down.

When the temperature drops to a certain extent, the water vapor in the air will condense into small water droplets and form fog.

Advection cooling is similar to inhaling fog outdoors in winter.

When cold air moves to warm air area for mixing or warm air moves to cold air area for mixing,

Water vapor in the air will eventually condense into small water droplets and form fog.

The appearance of foggy weather shows that the temperature has changed obviously in the past, but it is not necessarily a strong cooling.

At night, the radiation cools down and there is fog. Under normal circumstances (there are exceptions), it will be sunny after the fog clears the next day.

In addition: in foggy days, the surface wind speed is generally small, close to the static wind;

In most cases, there will be inversion, which is not conducive to the diffusion of pollutants.