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

January 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
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.

Temperature

In Chennai, India, the average high-temperature is relatively the same as in December - a still warm 28.8°C (83.8°F). In Chennai, the average low-temperature is 20.9°C (69.6°F).

Heat index

In January, the average heat index is appraised 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 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, wind, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Chennai, the average relative humidity is 73%.

Rainfall

In Chennai, India, during January, the rain falls for 1.3 days and regularly aggregates up to 22.5mm (0.9") of precipitation. In Chennai, during the entire year, the rain falls for 59.1 days and collects up to 1391.5mm (54.8") of precipitation.

Sea temperature

The month with the coldest seawater in Chennai is January, with an average sea temperature of 26.8°C (80.2°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

In January, the average length of the day is 11.5h.

Sunshine

In January, the average sunshine in Chennai is 8.7h.

UV index

In Chennai, the average daily maximum UV index is 10. A UV Index of 8 to 10 symbolizes a very high threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In January, the average maximum UV index of 10 translate into the following recommendations:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in January in Chennai?

The average high-temperature, in January, is 28.8°C (83.8°F), while the average low-temperature is 20.9°C (69.6°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines relative humidity and air temperature, in January is evaluated at 32.8°C (91°F).

What is the average humidity in January in Chennai?

In Chennai, India, the average relative humidity in January is 73%.

How many days does it rain in January in Chennai?

In Chennai, India, in January, it is raining for 1.3 days, with typically 22.5mm (0.9") of accumulated precipitation.

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

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

How warm is the water in January in Chennai?

In Chennai, India, the average seawater temperature in January is 26.8°C (80.2°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Chennai have in January?

In Chennai, India, the average length of the day in January is 11.5h.

How long on average sun shines in January in Chennai?

The average sunshine in January is 8.7h.

What is the UV index intensity in January in Chennai?

In Chennai, India, the average daily maximum UV index in January is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in January - Chennai, India
  • Average high temperature in January: 28.8°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 January: 20.9°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 January - Chennai, India
  • Average humidity in January: 73%

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

Average rainfall in January - Chennai, India
  • Average rainfall in January: 22.5mm

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 January - Chennai, India
  • Average rainfall days in January: 1.3 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 January - Chennai, India
  • Average sea temperature in January: 26.8°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 January / Average sunshine in January - Chennai, India
  • Average daylight in January: 11.5h

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 January: 8.7h

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 January - Chennai, India
  • Average UV index in January: 10

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).