The rains occur mainly as a result of "strong conventional currents" also known as convectional currents. This process begins with the heating of the Earth's surface by the sun, causing the air to warm and rise. As the warm air rises, it cools and forms clouds through a process called condensation.
When the clouds become heavy with water droplets, the water falls back to the ground as precipitation, which can include rain, snow, sleet, or hail. These strong conventional currents can occur in the afternoon when the sun is at its peak, heating the ground and air to high temperatures.
In contrast, the south-east and north-east trade winds refer to prevailing wind patterns in specific regions of the Earth and can play a role in determining the amount and timing of rainfall. Orographic effects refer to the influence of mountains on weather patterns and can also impact precipitation in certain areas.
