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

December 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
December, the first month of the winter, in Chennai, is still a warm month, with average temperature ranging between min 21.9°C (71.4°F) and max 28.5°C (83.3°F).

Temperature

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

Heat index

The average heat index in December is evaluated at a hot 32.8°C (91°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity.

Humidity

In December, the average relative humidity is 77%.

Rainfall

In Chennai, it is raining for 6.3 days, with typically 191.1mm (7.5") of accumulated precipitation. Throughout the year, there are 59.1 rainfall days, and 1391.5mm (54.8") of precipitation is accumulated.

Sea temperature

In Chennai, in December, the average water temperature is 26.9°C (80.4°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

With an average of 11.4h of daylight, December has the shortest days of the year.

Sunshine

The average sunshine in Chennai is 6.6h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 9. A UV Index estimate of 8 to 10 represents a very high health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 9 transform into the following instructions:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the coldest month in Chennai?

The coldest month in Chennai is December, 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 temperature in December in Chennai?

In December, the average high-temperature is 28.5°C (83.3°F), and the average low-temperature is 21.9°C (71.4°F).

What is the average humidity in December in Chennai?

In December, the average relative humidity is 77%.

How many days does it rain in December in Chennai?

In Chennai, in December, it is raining for 6.3 days, with typically 191.1mm (7.5") of accumulated precipitation.

How warm is the water in December in Chennai?

In Chennai, the average seawater temperature in December is 26.9°C (80.4°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Chennai?

With an average of 11.4h of daylight, December has the shortest days of the year in Chennai, India.

What is the average length of the day in December in Chennai?

The average length of the day in December in Chennai is 11.4h.

How long on average sun shines in December in Chennai?

In Chennai, India, the average sunshine in December is 6.6h.

When is the lowest UV index in Chennai?

With an average maximum UV index of 9, December is the month with the lowest UV index in Chennai.

What is the UV index intensity in December in Chennai?

The average daily maximum UV index in December is 9. A UV Index reading of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Chennai, India
  • Average high temperature in December: 28.5°C

The warmest month (with the highest average high temperature) is June (36.9°C).
The month with the lowest average high temperature is December (28.5°C).

  • Average low temperature in December: 21.9°C

The month with the highest average low temperature is May (27.9°C).
The coldest month (with the lowest average low temperature) is January (20.9°C).

Average humidity in December - Chennai, India
  • Average humidity in December: 77%

The month with the highest relative humidity is November (78%).
The month with the lowest relative humidity is June (57%).

Average rainfall in December - Chennai, India
  • Average rainfall in December: 191.1mm

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 in December - Chennai, India
  • Average rainfall days in December: 6.3 days

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 in December - Chennai, India
  • Average sea temperature in December: 26.9°C

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 in December / Average sunshine in December - Chennai, India
  • Average daylight in December: 11.4h

The month with the longest days is June (Average daylight: 12.9h).
The month with shortest days is December (Average daylight: 11.4h).

  • Average sunshine in December: 6.6h

The month with most sunshine is April (Average sunshine: 9.7h).
The month with least sunshine is July (Average sunshine: 6h).

Average UV index in December - Chennai, India
  • Average UV index in December: 9

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).