Weather in Chennai remains moderate all through the year. People need to wear lightweight clothes and carry an umbrella all through the year. Chennai gets 1,300 mm of rainfall annually. Monsoon rains occur with the advent of the Northeast Monsoon Winds.
The city is sometimes affected by the cyclones from the Bay of Bengal. Winters also receive moderate amount of rainfall.
The rainy season appear with the arrival of Northeast monsoon and it lasts till late November. Winter are preferable and remains from November to February and the temperature doesn't go below 20'C.
People of Chennai experiences winter monsoons during the month of October to December. During this time the lowest temperatures swing between 18°C to 20°C in the months of December and January.