December weather forecastChennai, 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.