April 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
April, like March, is another hot pre-monsoon summer month in Chennai, India, with temperature in the range of an average high of 32.9°C (91.2°F) and an average low of 27.8°C (82°F).
The perfect water temperature of 29.3°C (84.7°F) with 10mm (0.39") of accumulated rainfall and only 4.3 rainfall days, makes April a great period for swimming and other water activities.

Temperature

In Chennai, the average high-temperature in April is almost the same as in March - a still hot 32.9°C (91.2°F). In April, the average low-temperature is 27.8°C (82°F).

Heat index

The average heat index in April is evaluated at an extremely hot 44°C (111.2°F). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Note that heat index values are valued for light wind and location in the shade. 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 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like metabolic differences, wind, pregnancy, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Chennai, the average relative humidity is 72%.

Rainfall

In Chennai, it is raining for 4.3 days, with typically 10mm (0.39") of accumulated precipitation. In Chennai, India, during the entire year, the rain falls for 157.6 days and collects up to 823mm (32.4") of precipitation.

Sea temperature

In Chennai, the average seawater temperature is 29.3°C (84.7°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 Chennai, the average length of the day is 12.4h.

Sunshine

In Chennai, India, the average sunshine is 11.3h.

UV index

Months with the highest UV index in Chennai are April through July, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 8 interpret into the following advice:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in April in Chennai?

In Chennai, India, in April, the average high-temperature is 32.9°C (91.2°F), and the average low-temperature is 27.8°C (82°F). In April, the average heat index (a.k.a. 'felt air temperature', 'real feel'), that takes the relative humidity and factores it into the air temperature reading, is calculated to 44°C (111.2°F).

What is the average humidity in April in Chennai?

In Chennai, India, the average relative humidity in April is 72%.

How much does it rain in Chennai in April?

In Chennai, in April, during 4.3 rainfall days, 10mm (0.39") of precipitation is typically accumulated.

What is the sea water temperature in April in Chennai?

In Chennai, India, the average seawater temperature in April is 29.3°C (84.7°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 April?

In April, the average length of the day in Chennai is 12.4h.

How long on average sun shines in April in Chennai?

The average sunshine in April is 11.3h.

When is the highest UV index in Chennai?

Months with the highest UV index in Chennai are April through July, with an average maximum UV index of 8.

What is the UV index intensity in April in Chennai?

In Chennai, the average daily maximum UV index in April is 8. A UV Index value of 8 to 10 symbolizes a very high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in April - Chennai, India
  • Average high temperature in April: 32.9°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 April: 27.8°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).

Average pressure in April - Chennai, India
  • Average pressure in April: 1008.4mbar

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

Average wind speed in April - Chennai, India
  • Average wind speed in April: 18.2km/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).

Average humidity in April - Chennai, India
  • Average humidity in April: 72%

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

Average rainfall in April - Chennai, India
  • Average rainfall in April: 10mm

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

Average rainfall days in April - Chennai, India
  • Average rainfall days in April: 4.3 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).

Average sea temperature in April - Chennai, India
  • Average sea temperature in April: 29.3°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 April / Average sunshine in April - Chennai, India
  • Average daylight in April: 12.4h

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

  • Average sunshine in April: 11.3h

The month with the most sunshine is May (Average sunshine: 11.9h).
Months with the least sunshine are November and December (Average sunshine: 6.3).

Average sunshine days in April - Chennai, India
  • Average sunshine days in April: 25.5 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).

Average UV index in April - Chennai, India
  • Average UV index in April: 8

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).

Average cloud cover in April - Chennai, India
  • Average cloud cover in April: 12

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

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

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