What weather does the fog in summer morning indicate?

Most of the fog in spring and summer comes from the warm and humid air current at sea. When it hits the cold ground, the air in the lower layer becomes cold and the water vapor condenses into fog. This fog is called advection fog. It is formed when warm and humid air from the ocean invades the mainland and suddenly encounters cold. When these warm and humid air currents meet the dry and cold air currents in the mainland, it will naturally be rainy. So the fog in spring and summer indicates rainy weather.

In autumn and winter, after the cold air in the north moves south, as the weather turns sunny and sunny, the moisture content in the air gradually increases, which is easy to form radiation fog, so the fog in autumn and winter often indicates sunny days.