🇵🇰 Karachi vs 🇮🇳 Mumbai

Karachi's climate is dominated by its position on the Arabian Sea coast along the southern edge of the Sindh plain, creating a hot semi-arid environment moderated by maritime influence. The city experiences extreme heat from April to June before the southwest monsoon brings humid relief, while sea breezes penetrate unevenly across the sprawling metropolitan area depending on distance from the coast and building density. The Lyari and Malir river corridors, mangrove-fringed coastline, and stark contrasts between dense old-city fabric and open peripheral development create significant microclimate variation across the megacity.

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.