Why is there fog when it rains?

1, fog is the condensation phenomenon of water vapor in the air near the ground.

2. The air near the ground is rich in water vapor.

The ground temperature is very low. There is a lot of water on the ground after the rain, which is evaporated, and the temperature is still low after the rain, so it constitutes the conditions for fog formation.

4. Fog is a small water droplet with too much water vapor in the air and condensation in cold air. On rainy days, fog is more likely to appear in the air with high humidity, high water vapor and low temperature.

5. After the rain, the ground heat is lost and the temperature drops. At this time, the air is quite humid. When the air is cooled to a certain extent, part of the water vapor in the air will condense into tiny water droplets and be suspended in the air layer near the ground. If there is no wind in the mountainous area, the suspended droplets are not easy to spread, and fog is formed.