The up and down direction of the minimum wind frequency is different from the prevailing wind direction all the year round. The wind direction in an area is not fixed. The prevailing wind direction is the local dominant wind direction, and the minimum frequency is divided into the direction with the smallest wind direction in a year!

The rose chart of wind direction can clearly show the minimum wind frequency and dominant wind direction in a certain area.

As shown in the figure, the northeast direction is the minimum wind frequency direction!