What is the foggy weather like in summer?

Warm and humid air from the sea invades the mainland, and suddenly meets a cold current, forming a summer fog, which indicates that it will rain today.

Fog is closely related to future weather changes. The working people in China have known this truth since ancient times, and it is reflected in many folk proverbs. For example, "Huangmei is foggy, rocking the boat doesn't ask for directions." This means that the fog at the turn of spring and summer is a harbinger of rain, so people also have the saying of "summer fog and rain". Another example is: "I can't see anyone in the fog, so I dare to wash my clothes." This means that winter fog is sunny, and so is autumn fog.