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

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 average temperature fluctuating between 26.4°C (79.5°F) and 34.3°C (93.7°F).
The ideal sea water temperature of 29.3°C (84.7°F) and only 0.6 rainfall days, with 7.7mm (0.3") of accumulated rainfall, make April the best time for swimming and other water activities.

Temperature

In April, the average high-temperature is practically the same as in March - a still hot 34.3°C (93.7°F). The average low-temperature, in Chennai, is 26.4°C (79.5°F).

Heat index

In April, the average heat index is evaluated at a life-threatening hot 47.3°C (117.1°F). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like wind, metabolic differences, pregnancy, and activity influence one's weather impression. 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 particularly important for children. 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 cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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 69%.

Rainfall

In Chennai, India, it is raining for 0.6 days, with typically 7.7mm (0.3") of accumulated precipitation. Throughout the year, in Chennai, there are 59.1 rainfall days, and 1391.5mm (54.8") of precipitation is accumulated.

Sea temperature

In Chennai, in April, the average water temperature is 29.3°C (84.7°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in Chennai is 12.4h.

Sunshine

With an average of 9.7h of sunshine, April has the most sunshine of the year.

UV index

February through September, with an average maximum UV index of 12, are months with the highest UV index in Chennai. A UV Index estimate of 11, and higher, represents an extreme health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 12 in April interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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. 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 April, in Chennai, India, the average high-temperature is 34.3°C (93.7°F), and the average low-temperature is 26.4°C (79.5°F). The average heat index (a.k.a. 'real feel', 'feels like'), that combines air temperature and relative humidity, in April is estimated at 47.3°C (117.1°F).

What is the average humidity in April in Chennai?

The average relative humidity in April in Chennai, India, is 69%.

How many days does it rain in April in Chennai?

In Chennai, India, in April, during 0.6 rainfall days, 7.7mm (0.3") of precipitation is typically accumulated.

What is the water temperature in April in Chennai?

In Chennai, in April, the average water temperature is 29.3°C (84.7°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 average length of the day in April in Chennai?

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

What month has the most sunshine in Chennai?

April has the most sunshine of the year in Chennai, India, with an average of 9.7h of sunshine.

How long on average sun shines in April in Chennai?

In April, the average sunshine is 9.7h.

What are the months with the highest UV index in Chennai?

Months with the highest UV index in Chennai, India, are February through September, with an average maximum UV index of 12.

How high is the UV index in April in Chennai?

The average daily maximum UV index in April in Chennai, India, is 12. A UV Index reading of 11, and higher, represents an extreme health vulnerability from the exposure to the Sun's UV rays.
Average temperature in April - Chennai, India
  • Average high temperature in April: 34.3°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 April: 26.4°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 April - Chennai, India
  • Average humidity in April: 69%

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

Average rainfall in April - Chennai, India
  • Average rainfall in April: 7.7mm

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 April - Chennai, India
  • Average rainfall days in April: 0.6 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 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 shortest days is December (Average daylight: 11.4h).

  • Average sunshine in April: 9.7h

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 April - Chennai, India
  • Average UV index in April: 12

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).