Why are south west monsoon bring less rainfall for tamilnadu?

The southwest monsoon brings less rainfall to Tamil Nadu primarily due to its geographical position and the prevailing wind patterns. The state is situated on the leeward side of the Western Ghats, which block much of the moisture-laden winds from reaching it. As a result, while the Western Ghats receive significant rainfall, Tamil Nadu experiences a rain shadow effect, leading to reduced precipitation during the southwest monsoon season. Additionally, the monsoon winds tend to weaken as they move further south, further contributing to lower rainfall in the region.