Climate in Chennai, India

Chennai, India has a tropical climate. The annual average temperature is about 26.4°C, with around 1645 hours of sunshine; the national rainfall baseline is roughly 1100 mm across 93 rainy days a year. The warmest month is Jul (highs near 32.5°C) and the coldest is Jan (lows near 20.2°C). These are deterministic planning estimates, not a forecast or measured station data. Temperature and sunshine follow the city's latitude; rainfall and the climate zone come from a country-level baseline that every city in the country shares (refined by region in the United States, Canada and Australia), so they do not show local differences. Check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Chennai is classified as Tropical. The classification combines the city’s own temperature range, which follows its latitude, with a rainfall pattern taken at country level for India — so cities in the same country usually share a zone.

The rainfall baseline for India is about 1100 mm a year over roughly 93 rainy days, with the wettest month Jul and the driest Jan. This figure is not specific to Chennai: every city in India carries the same baseline, so it will not show the difference between, say, a dry inland city and a wet coastal one. Use an official meteorological service for local rainfall.

Chennai sees an estimated 1645 hours of sunshine a year, concentrated in the warmer months around Jul.

By temperature and rainfall, the most comfortable months in Chennai are Jan, Feb, Dec. Conditions vary year to year — verify with a current forecast before booking.

Chennai has a climate comfort score of 70/100, a comfortable year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.

• Climate in Bangalore — Tropical, comfort 70/100
• Climate in Hyderabad — Tropical, comfort 75/100
• Climate in Mumbai — Tropical, comfort 75/100