Why we see fog in the lowland in The Early Mornings Of December?

Fog often forms in lowland areas during early mornings in December due to cooler temperatures at night, which cause moisture in the air to condense. As the ground cools, the air near the surface cools as well, leading to increased humidity and the formation of fog, especially when the air is calm. Additionally, lowland areas can trap cooler, denser air, further promoting fog development. This phenomenon is more pronounced in December due to the longer nights and lower temperatures typical of winter.