Mumbai is hotter than Kanpur in December since it is arranged close to the 
seashore and close to the equator. Mumbai is hotter than Kanpur in December 
since Mumbai is close to the coastal locale so the temperature becomes 
moderate.

Coastal regions will, for the most part, have more direct temperatures than 
inland zones due to the heat limit of the sea. At the point when the land 
heats up, the air above it heats up also. Then again, the sea warms up and 
cools down generally gradually.