May in Chennai averages a daily high of 38.6°C with nights around 27.7°C. Expect roughly 3.4 wet days totalling 73.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Chennai is December–February.
Based on MADRAS MINAMBAKKAM, IN (14.2km), 1995–2024. 20 years of May data.