🇮🇳 Chennai vs 🇮🇳 New Delhi

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.

Semi-arid — extreme summers, cold winters, brief monsoon, severe air pollution

Delhi has extreme seasonal swings. Winters can frost; summers regularly hit 113°F (45°C). The monsoon (July–September) provides relief but also flooding. The city has severe air quality problems, particularly October–February when pollution peaks.