As it lies very close to the equator, there is small fluctuation in seasonal temperature. The mercury rises to 40 °C during the summer months but the average temperature in the winters revolves around 24 °C. People of Chennai enjoy monsoon rains from June to September.
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.
In Chennai, the months of April and May are considered to be the the hottest months of the Summer season when the mercury exceeds 40ºC. The coastal regions of the city remain quite warm and humid but the cool sea breeze bring relief to the city. Nights are quiet pleasant that the daytime.
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 18ºC to 20ºC in the months of December and January.
