Question

why is Delhi and Amritsar hotter than Mumbai and Chennai ?​

Answer 1

Delhi being North of Mumbai gets more Sun during these months. Because of strong sun the environment and the air around Delhi {and other Northern states) because warmer and lighter. Mumbai enjoys Maritime climate being near to sea , and is not impacted by such phenomena.

The distance from the sea also influences the climate of a place. Since Mumbai and Kolkata are closer to the sea they experience a moderate but humid climate in comparison to Delhi and Amritsar.

Answer 2

Answer:

The distance from the sea also influences the climate of a  place. Since Mumbai and Kolkata are closer to the seat they  experience a moderate but humid climate in comparison to  Delhi and Amritsar.