It was sunny at the foot of the mountain, but it began to rain halfway up the mountain. Why is the weather different at the foot of the mountain?

The weather difference between mountains is mainly influenced by topography and altitude.

1, influence of terrain: the terrain at the foot of the mountain is flat, without obstacles from high mountains, with good air circulation and high air humidity, which is easy to form low clouds, fog and haze. Halfway up the mountain, the mountains began to rise, the terrain was complex, the atmospheric circulation was blocked, the air was thin and the humidity was low, which was easy to form clouds and rainfall.

2. Influence of altitude: With the increase of altitude, the temperature and air pressure decrease, the air is relatively thin and the humidity is relatively low. Such climatic and environmental conditions are very conducive to the formation of clouds and the occurrence of rainfall. The altitude at the foot of the mountain is relatively low, the air pressure and temperature are relatively high, the air is relatively dense, and the humidity is relatively high, which is not conducive to the formation of clouds and the occurrence of rainfall.