December weather forecast
Chennai, India

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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

Weather in December

Closing the year, December in Chennai brings noticeable cooling, with temperatures easing to 27.4°C (81.3°F). The rain showers subdue, marking the lowest rainfall level since February and opening up possibilities for outdoor activities. Short winter days, coupled with significant daylight, make it the best month for tourists to explore Chennai. After the November showers, wind strength picks up once more, bringing a fresh and cooling influence to the city’s air. Keenly felt but gentle in disposition, Chennai's winter finally steps on-stage in December, promising a delightful close to a year of diverse weather.

Temperature

Chennai measures an average high-temperature of a still warm 27.4°C (81.3°F) in December, nearly consistent with the preceding month. In Chennai, the month of December brings a consistent average low-temperature of 24.3°C (75.7°F), slightly cooler than its daytime highs.

Heat index

In December, the heat index is evaluated at a tropical 30°C (86°F). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'real feel' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.

Humidity

In December, the average relative humidity is 75%.

Rainfall

In December, in Chennai, the rain falls for 14.8 days. Throughout December, 102mm (4.02") of precipitation is accumulated. Throughout the year, there are 157.6 rainfall days, and 823mm (32.4") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature is 26.9°C (80.4°F).
Note: Water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm, making water activities enjoyable for prolonged periods without any uncomfortable sensations.

Daylight

With an average of 11h and 24min of daylight, December has the shortest days of the year in Chennai.
On the first day of the month, sunrise is at 6:15 am and sunset at 5:40 pm. On the last day of December, sunrise is at 6:30 am and sunset at 5:53 pm IST.

Sunshine

November and December, with an average of 6.3h of sunshine, are months with the least sunshine in Chennai.

UV index

In Chennai, the average daily maximum UV index in December is 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 7 in December converts into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
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Frequently asked questions

What is the temperature in December in Chennai?

The average high-temperature, in December, in Chennai, is 27.4°C (81.3°F), while the average low-temperature is 24.3°C (75.7°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in December is evaluated at 30°C (86°F).

What is the average humidity in December in Chennai?

In December, the average relative humidity in Chennai is 75%.

How much does it rain in Chennai in December?

In December, the rain falls for 14.8 days. Throughout December, 102mm (4.02") of precipitation is accumulated.

What is the sea water temperature in December in Chennai?

In December, the average sea temperature in Chennai 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 11h and 24min of daylight, December has the shortest days of the year in Chennai, India.

How many hours of daylight does Chennai have in December?

In December, the average day length in Chennai, India, is 11h and 22min.

What time are sunrise and sunset in December in Chennai?

On the first day of December in Chennai, sunrise is at 6:15 am and sunset at 5:40 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 5:53 pm IST.

What is the month with the least sunshine in Chennai?

November and December, with an average of 6.3h of sunshine, are months with the least sunshine in Chennai.

How many hours of sunshine does Chennai have in December?

In December, the average sunshine duration is 6.3h.

How high is the UV index in December in Chennai?

The average daily maximum UV index in December in Chennai is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.

Average temperature in December
Chennai, India

Average temperature in December - Chennai, India
  • Average high temperature in December: 27.4°C

The warmest month (with the highest average high temperature) is May (34.8°C).
The month with the lowest average high temperature is January (27.3°C).

  • Average low temperature in December: 24.3°C

The month with the highest average low temperature is May (29.6°C).
The coldest month (with the lowest average low temperature) is January (23.4°C).

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Average pressure in December
Chennai, India

Average pressure in December - Chennai, India
  • Average pressure in December: 1012.2mbar

The month with the highest atmospheric pressure is January (1013.6mbar).
The month with the lowest atmospheric pressure is June (1004.2mbar).

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Average wind speed in December
Chennai, India

Average wind speed in December - Chennai, India
  • Average wind speed in December: 17.8km/h

The windiest month (with the highest average wind speed) is May (19.2km/h).
The calmest months (with the lowest average wind speed) are February and October (12.8km/h).

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Average humidity in December
Chennai, India

Average humidity in December - Chennai, India
  • Average humidity in December: 75%

The month with the highest relative humidity is November (76%).
The month with the lowest relative humidity is June (63%).

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Average rainfall in December
Chennai, India

Average rainfall in December - Chennai, India
  • Average rainfall in December: 102mm

The wettest month (with the highest rainfall) is November (213mm).
The driest month (with the least rainfall) is February (6mm).

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Average rainfall days in December
Chennai, India

Average rainfall days in December - Chennai, India
  • Average rainfall days in December: 14.8 days

The month with the highest number of rainy days is September (23.1 days).
The month with the least rainy days is February (2.9 days).

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Average sea temperature in December
Chennai, India

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).

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Average daylight in December /
Average sunshine in December
Chennai, India

Average daylight in December / Average sunshine in December - Chennai, India
  • Average daylight in December: 11h and 2min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is May (Average sunshine: 11h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).

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Average sunshine days in December
Chennai, India

Average sunshine days in December - Chennai, India
  • Average sunshine days in December: 11.8 days

The month with the most sunshine days is March (26.5 days).
The month with the least sunshine days is September (6.2 days).

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Average UV index in December
Chennai, India

Average UV index in December - Chennai, India
  • Average UV index in December: 7

The months with the highest UV index are April, May, June and July (UV index 8).
The month with the lowest UV index is October (UV index 6).

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Average cloud cover in December
Chennai, India

Average cloud cover in December - Chennai, India
  • Average cloud cover in December: 38

The months with the most cloud cover are July and August (Cloud cover 40).
The months with the least cloud cover are March and April (Cloud cover 12).

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Average visibility in December
Chennai, India

Average visibility in December - Chennai, India
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Chennai, India

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