🇮🇳 Chennai vs 🇳🇬 Lagos

Chennai's tropical wet-and-dry climate is defined by its long Bay of Bengal coastline, which delivers the northeast monsoon from October to December — the city's primary rainy season, unusual for an Indian metro. The flat coastal plain offers little topographic relief, so microclimates are driven primarily by proximity to the sea, river corridors along the Adyar and Cooum, and dramatic variation in building density and green cover. Summer temperatures routinely exceed 40°C inland while coastal neighborhoods benefit from steady onshore sea breezes that moderate heat by 3–5°C.

Tropical monsoon — hot and humid year-round with distinct wet and dry seasons

Lagos is hot and humid year-round. The wet season (April–October) brings heavy rains and periodic flooding; the dry season (November–March) is the best time to visit. The harmattan wind (December–February) brings dry, hazy air from the Sahara.