What is the reason for the foggy winter in Lima, the capital of Peru? Why is it winter? Please be more detailed, thank you

First understand the formation of fog.

When there is sufficient moisture, breeze and stable atmosphere, if the air close to the ground cools to a certain extent, the moisture in the air will It will condense into fine water droplets suspended in the air, reducing the visibility at the ground level. This weather phenomenon is called fog.

Therefore, it is not easy to fog during the day, and it is foggy when the temperature drops at night. It is not easy to fog up in the summer half of the year. Fog is easy to form when the temperature drops in the winter half of the year. It is not easy to cause fog in the dry inland areas, and it is easy to cause fog in humid and humid places along the coast and rivers.

There are sources of water vapor along the coast of Lima. In addition, the cold current in Peru cools down the water vapor easily, so water vapor is easy to form. It condenses into fog. In addition, the temperature in winter is low, the ground heat is lost, the temperature drops, and the coastal air is humid, so it is not surprising that it becomes foggy when it cools to a certain extent.