🇮🇳 Kolkata vs 🇮🇳 Mumbai

Kolkata's tropical wet-and-dry climate is dominated by the Bay of Bengal monsoon, the Hooghly River corridor, and the vast deltaic floodplain of the Ganges. The city experiences extreme humidity from May through October, with the river and surrounding wetlands amplifying moisture levels, while winter months bring dry northwesterly winds and brief cool spells. The dense urban core generates a pronounced heat island effect, but the Hooghly riverfront, the East Kolkata Wetlands, and the Maidan parkland create significant cooling corridors that shape neighborhood-level weather.

Tropical monsoon — hot and humid year-round, extreme monsoon season

Mumbai has one of the world's most dramatic monsoon seasons. The southwest monsoon (June–September) dumps enormous rainfall, regularly flooding the city. The dry season (November–February) is the time to visit with warm but manageable conditions.