Does the fog in the morning mean that it may be sunny?

Fog appears in the morning, and the weather on this day is generally sunny. This is because the sun shines on the ground during the day and the ground accumulates a lot of heat. Because of the evaporation of water, the air with higher temperature can hold more water vapor, so there is more water vapor in the air. After the sun went down, heat began to radiate into the air, and the air temperature near the ground also decreased. By midnight and morning, the temperature of the ground air has dropped very low. At this time, even indoors, we can easily feel much colder than midnight. After the near-surface temperature drops, the water vapor in the air exceeds saturation, and the excess water vapor condenses into tiny water droplets, which are distributed at low altitude. This kind of fog usually appears near the center of high pressure, so when this kind of fog appears, although it is foggy in the morning, it will be sunny as long as the sun comes out and evaporates the fog.

Fog and clouds are caused by temperature drop. Water on the ground evaporates and flies into the air, and then condenses and accumulates into clouds. If the water vapor is cold at low altitude near the ground, it condenses into small water droplets and accumulates into fog, blocking people's sight. So fog can actually be said to be a cloud near the ground.

There are two kinds of common fog: radiation fog and advection fog. Radiation fog mostly occurs in sunny mornings in winter, and "advection fog" (also called sea fog) mostly occurs in spring and summer. Is the fog formed by water vapor in the air when it is cold?

The fog in Mount Emei forms a peculiar landscape: Kirishima. The clouds around the mountainside are as quiet as practice, as moving as smoke, as light as floc, as wide as the sea and as white as cotton. On the top of the mountain, people look at the clouds under their feet, and the mountains and rivers are filled with rain and fog, as if they were in an ethereal fantasy fairyland.