Why is it so foggy in early spring?

February and March each year is the season with the greatest climate change in South China. For me who grew up in the north, the south in early spring always surprises me. Sometimes it's cold enough to wear cotton-padded clothes, and the next day it will be sultry as summer. In this cold-hot conversion, the sky is foggy most of the time.

You must be from the south.

If the air near the ground is cooled to a certain extent under the conditions of sufficient moisture, breeze and stable atmosphere, the moisture in the air will condense into tiny water droplets suspended in the air, which will reduce the visibility of the ground. This weather phenomenon is called fog. Fog is more common in spring from February to April.