Why does it rain every day in Guangdong in June?

This is related to geographical and climatic factors.

Guangdong's climate belongs to subtropical monsoon climate, and the rain belt reaches Nanling in May. This rain belt is frontal rain caused by quasi-static front in South China. In summer, the southwest monsoon is entering the inland of China northward, and its front position is often on the trough line, so the trough of low pressure at this time is also called monsoon trough.

Different air currents converge on the monsoon trough, so the air is forced to rise and the water vapor in the air condenses into clouds and rain.

Recently, due to the northward influence of tropical storm "Miller" No.5 this year, the monsoon trough in the southwest of the South China Sea slowly moved northward, and its occupied area will often be affected by newly developed convection activities, with bad weather and heavy rain.