Why does the weather in the mountains change as it says?

This is due to the microclimate caused by the complex terrain in mountainous areas and the difficult consistency of wind directions (mainly because the mountains blocked the wind and changed the wind direction). In addition, there are many trees in the mountains, and there will be a forest microclimate (due to the existence and influence of forests, there are microclimate characteristics such as reduced solar radiation, moderate daily temperature difference, increased air humidity and precipitation, and reduced wind speed). In addition, the complex terrain in mountainous areas also makes the rising water vapor on the surface constantly change direction, resulting in erratic clouds. The existence of the above factors makes the weather in mountainous areas changeable.