What is the main wind blowing in the northern hemisphere in spring?

In fact, there is no fixed wind direction, and the three-circle circulation in middle school geography class is just a purely theoretical thing. The weather system changes every day. For example, today, Shanghai is affected by cold air. The north wind is bound to blow in front of the cold high pressure, but as the cold high pressure moves eastward, Shanghai will run behind the high pressure and the wind direction will turn to a southerly wind. The wind field is annular. When the strength of warm air increases, southeast wind will blow in front of warm and low pressure. . It is meaningless to say what is the main wind. . . Winter is not always north. There is always the influence of low pressure, and there is always a time to run behind high pressure. This is the south wind or the east wind.