How much humidity will produce water south wind?

When the humidity is above 90%, the south wind will be generated.

The southerly wind is a phenomenon of weather resurgence, which generally appears in February and March in spring. The main reason is that after the cold air leaves, the warm and humid airflow quickly counterattacks, resulting in an increase in temperature and air humidity. Some cold objects are easy to produce water droplets when they encounter warm and humid airflow.

The humidity of the water wind in the south is generally above 90%. As soon as the southern wind appears, the walls and the ground will "bubble" and get wet everywhere. This is because it is too wet and the humidity is too high, and the water vapor in the air reaches saturation and condenses into water.

From the meteorological point of view, after a long period of low temperature, the surface of the object is completely cold. When the temperature of an object is less than or equal to zero, the water vapor in the air reaches saturation and begins to condense on the surface of the object, resulting in water droplets and southerly winds.