Chennai
India
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Chennai, India

A staircase to the front entrance of the Ramakrishna Temple in Chennai, India
A staircase to the front entrance of the Ramakrishna Temple in Chennai, India
The best months for a swim in Chennai, India, are January through June, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.

January, like December, in Chennai, India, is a moderately hot winter month, with average temperature fluctuating between 28.8°C (83.8°F) and 20.9°C (69.6°F). The ideal sea water temperature of 26.8°C (80.2°F) and only 1.3 rainfall days, with 22.5mm (0.9") of accumulated rainfall, make January the best time for swimming and other water activities. Weather in January »

February, the last month of the winter, in Chennai, is a hot month, with average temperature fluctuating between 22°C (71.6°F) and 30.5°C (86.9°F). The ideal sea water temperature of 27.2°C (81°F) and only 0.4 rainfall days, with 2.2mm (0.1") of accumulated rainfall, make February the best time for swimming and other water activities. Weather in February »

March, the first month of the pre-monsoon summer, in Chennai, is still a tropical month, with average temperature fluctuating between 23.8°C (74.8°F) and 32.5°C (90.5°F). The ideal sea water temperature of 28.1°C (82.6°F) and only 0.3 rainfall days, with 4mm (0.2") of accumulated rainfall, make March the best time for swimming and other water activities. Weather in March »

April, like March, is another hot pre-monsoon summer month in Chennai, India, with average temperature fluctuating between 26.4°C (79.5°F) and 34.3°C (93.7°F). The ideal sea water temperature of 29.3°C (84.7°F) and only 0.6 rainfall days, with 7.7mm (0.3") of accumulated rainfall, make April the best time for swimming and other water activities. Weather in April »

The last month of the pre-monsoon summer, May, is a very hot month in Chennai, India, with average temperature ranging between min 27.9°C (82.2°F) and max 36.8°C (98.2°F). The ideal sea water temperature of 29.5°C (85.1°F) and only 1.4 rainfall days, with 43.9mm (1.7") of accumulated rainfall, make May the best time for swimming and other water activities. Weather in May »

June, the first month of the rainy (monsoon) season, in Chennai, is still a very hot month, with average temperature fluctuating between 36.9°C (98.4°F) and 27.5°C (81.5°F). The ideal sea water temperature of 29.3°C (84.7°F) and only 4 rainfall days, with 55.9mm (2.2") of accumulated rainfall, make June the best time for swimming and other water activities. Weather in June »

July, like June, in Chennai, India, is another sweltering rainy (monsoon) season month, with average temperature fluctuating between 26.3°C (79.3°F) and 35°C (95°F). In July, the average high-temperature is almost the same as in June - a still torrid 35°C (95°F). Weather in July »

August, like July, is a hot rainy (monsoon) season month in Chennai, India, with average temperature fluctuating between 25.7°C (78.3°F) and 34.3°C (93.7°F). In Chennai, the average high-temperature is almost the same as in July - a hot 34.3°C (93.7°F). Weather in August »

The last month of the rainy (monsoon) season, September, is another tropical month in Chennai, India, with average temperature varying between 25.5°C (77.9°F) and 33.9°C (93°F). In September, the average high-temperature is relatively the same as in August - a still tropical 33.9°C (93°F). Weather in September »

The first month of the post monsoon autumn, October, is still a hot month in Chennai, India, with temperature in the range of an average high of 31.8°C (89.2°F) and an average low of 24.5°C (76.1°F). In October, the average high-temperature is practically the same as in September - a still hot 31.8°C (89.2°F). Weather in October »

The last month of the post monsoon autumn, November, is also a moderately hot month in Chennai, India, with average temperature ranging between min 23°C (73.4°F) and max 29.6°C (85.3°F). In Chennai, the average high-temperature is essentially the same as in October - a warm 29.6°C (85.3°F). Weather in November »

The first month of the winter, December, is still a warm month in Chennai, India, with temperature in the range of an average low of 21.9°C (71.4°F) and an average high of 28.5°C (83.3°F). December is the coldest month, with an average high-temperature of 28.5°C (83.3°F) and an average low-temperature of 21.9°C (71.4°F). In December, the average heat index is calculated to a tropical 32.8°C (91°F). Weather in December »

How much does it rain in Chennai?

Throughout the year, there are 59.1 rainfall days, and 1391.5mm (54.8") of precipitation is accumulated.

What is the month with the coldest sea water in Chennai?

January is the month with the coldest seawater, with an average sea temperature of 26.8°C (80.2°F).

What is the driest month in Chennai?

February is the month with the least rainfall in Chennai, India. Rain falls for 0.4 days and accumulates 2.2mm (0.1") of precipitation.

When is the highest UV index in Chennai?

Months with the highest UV index are February through September, with an average maximum UV index of 12.

What month has the most sunshine in Chennai?

April has the most sunshine of the year in Chennai, with an average of 9.7h of sunshine.

What is the month with the warmest sea water in Chennai?

With an average sea temperature of 29.5°C (85.1°F), May is the month with the warmest seawater.

What is the warmest month in Chennai?

With an average high-temperature of 36.9°C (98.4°F) and an average low-temperature of 27.5°C (81.5°F), June is the warmest month in Chennai.

What is the least humid month in Chennai?

The least humid month is June, with an average relative humidity of 57%.

When are the longest days in Chennai?

June has the longest days of the year in Chennai, India, with an average of 12.9h of daylight.

What is the month with the least sunshine in Chennai?

The month with the least sunshine in Chennai is July, with an average of 6h of sunshine.

What is the most humid month in Chennai?

The most humid month is November, with an average relative humidity of 78%.

What is the wettest month in Chennai?

November is the month with the most rainfall. Rain falls for 11.7 days and accumulates 407.4mm (16") of precipitation.

What is the coldest month in Chennai?

December is the coldest month in Chennai, with an average high-temperature of 28.5°C (83.3°F) and an average low-temperature of 21.9°C (71.4°F).

What is the month with the shortest days in Chennai?

The month with the shortest days in Chennai is December, with an average of 11.4h of daylight.

What is the month with the lowest UV index in Chennai?

December is the month with the lowest UV index, with an average maximum UV index of 9.
Average temperature - Chennai, India
Average rainfall - Chennai, India

The wettest month (with the highest rainfall) is November (407.4mm).
The driest month (with the lowest rainfall) is February (2.2mm).

Average rainfall days - Chennai, India

The month with the highest number of rainy days is November (11.7 days).
The month with the lowest number of rainy days is March (0.3 days).

Average sea temperature - Chennai, India

The best month for swimming (with the highest average sea temperature) is May (29.5°C).
The coldest month (with the lowest average sea temperature) is January (26.8°C).

Average daylight / Average sunshine - Chennai, India
Average UV index - Chennai, India

Months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).