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

July 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
July, like June, in Chennai, India, is another sweltering rainy (monsoon) season month, with average temperature fluctuating between 26.3°C (79.3°F) and 35°C (95°F).

Temperature

In July, the average high-temperature is almost the same as in June - a still torrid 35°C (95°F). In July, the average low-temperature is 26.3°C (79.3°F).

Heat index

In July, the average heat index is estimated at a life-threatening hot 47.1°C (116.8°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
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', 'feels like', 'felt air temperature', or 'apparent temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, clothing, differences in body mass, height, and shape). 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 cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. 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 July, the average relative humidity in Chennai is 64%.

Rainfall

In Chennai, India, it is raining for 6.9 days, with typically 100.3mm (3.9") of accumulated precipitation. Throughout the year, in Chennai, India, there are 59.1 rainfall days, and 1391.5mm (54.8") of precipitation is accumulated.

Sea temperature

In July, the average sea temperature is 29°C (84.2°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

In July, the average length of the day in Chennai is 12.8h.

Sunshine

July has the least sunshine of the year, with an average of 6h of sunshine.

UV index

Months with the highest UV index are February through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In July, the average maximum UV index of 12 translate into the following recommendations:
Take all necessary precautions, as unprotected skin can burn in minutes. 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. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in July in Chennai?

The average high-temperature, in July, in Chennai, India, is 35°C (95°F), while the average low-temperature is 26.3°C (79.3°F). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, is estimated at 47.1°C (116.8°F).

What is the average humidity in July in Chennai?

In Chennai, the average relative humidity in July is 64%.

How many days does it rain in July in Chennai?

In Chennai, India, in July, during 6.9 rainfall days, 100.3mm (3.9") of precipitation is typically accumulated.

What is the sea water temperature in July in Chennai?

In Chennai, the average seawater temperature in July is 29°C (84.2°F). 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.

How many hours of daylight does Chennai have in July?

In July, the average length of the day in Chennai, India, is 12.8h.

What is the month with the least sunshine in Chennai?

The month with the least sunshine in Chennai is July, with an average of 6h of sunshine.

How long on average sun shines in July in Chennai?

In Chennai, India, the average sunshine in July is 6h.

What is the month with the highest UV index in Chennai?

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

What is the UV index intensity in July in Chennai?

In Chennai, the average daily maximum UV index in July is 12. A UV Index of 11, and more, symbolizes an extreme health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in July - Chennai, India
  • Average high temperature in July: 35°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 July: 26.3°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 July - Chennai, India
  • Average humidity in July: 64%

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

Average rainfall in July - Chennai, India
  • Average rainfall in July: 100.3mm

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 July - Chennai, India
  • Average rainfall days in July: 6.9 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 July - Chennai, India
  • Average sea temperature in July: 29°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 July / Average sunshine in July - Chennai, India
  • Average daylight in July: 12.8h

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 July: 6h

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 July - Chennai, India
  • Average UV index in July: 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).