Weather in Chennai, Tamil Nadu
Located in Tamil Nadu, India, Chennai is a large and bustling city in the tropical monsoon climate zone, at about 13.1°N latitude.
Climate Overview
South India benefits from both the southwest monsoon (June–September) and the northeast monsoon (October–December), ensuring year-round agricultural viability. Temperatures in Chennai range from moderate winters to warm or hot summers, depending on elevation and proximity to the coast. Weather here is dominated by seasonal monsoon patterns, which bring the bulk of annual rainfall.
Weather by season in Chennai
Chennai's year divides into four broad seasons. The southwest monsoon normally arrives around 5 June. Daytime figures below are typical lowland values for this latitude — hill stations sit markedly cooler.
- Winter (Dec–Feb): days around 31°C, nights around 22°C. Mild, dry and one of the most pleasant times to visit.
- Summer / pre-monsoon (Mar–Jun): days around 37°C, nights around 26°C. Warm and humid, building towards the monsoon.
- Monsoon (Jul–Sep): days around 32°C, nights around 24°C. Frequent rain and high humidity; the wettest part of the year.
- Post-monsoon (Oct–Nov): days around 31°C, nights around 23°C. The northeast monsoon brings the main rains to the far south now.
Today's Weather in Chennai
The current weather conditions in Chennai are updated every hour from the ECMWF global model via Open-Meteo. You can see real-time temperature, humidity, wind speed and air quality at the top of this page.
Hourly Forecast
Use the hour-by-hour forecast to spot rain windows, peak heat and overnight lows for Chennai. Each hour shows temperature, wind, humidity and chance of rain.
7-Day Weather Forecast for Chennai
Tomorrow's weather, the day after and the full week ahead for Chennai are summarised in the 7-day outlook. Rain, cloud cover and wind direction are all shown.
Air Quality in Chennai
Air quality in Chennai is measured using the European Air Quality Index, with PM2.5 and PM10 particulate matter readings displayed alongside the live forecast. In larger cities like Chennai, AQI can deteriorate sharply from October to January. A mask and limited outdoor time can help on the worst days.
Quick facts about Chennai
Chennai has a population of about 46,81,087; sits at 13.08°N; and is in India; its monsoon typically arrives in early June.
Common spellings
Local search audiences in Tamil Nadu often type the weather query in Tamil (தமிழ்). The Tamil word for weather is வானிலை, commonly transliterated as vaanilai, vanilai, vaaniilai, vanilaai. The Hindi मौसम (mausam, mosam, mausham) is also widely used across Chennai. All refer to the same thing — current weather, today's temperature and the forecast you'll find on this page.
Nearby Cities in Tamil Nadu
Explore weather forecasts for other cities in Tamil Nadu. See the "More in Tamil Nadu" section above, or browse the full list on our states page.