Is it foggy in spring night?

It will be foggy in the evening after beginning of spring. Because the winter after beginning of spring is still cold, it won't start warming immediately after beginning of spring, but after beginning of spring, it won't be foggy until long summer, following the arrival of rain in the solar terms of the lunar calendar.

Advection fog: When the warm and humid air flows horizontally over the cold water surface or land, the warm and humid air flows with the cold to cool and condense into fog. This phenomenon usually occurs in winter and lasts for a long time, sometimes even reaching hundreds of meters thick. The appearance of advection fog is uncertain and often lasts for a long time. Advection fog will not dissipate unless the wind direction changes or stops, usually in spring night.