September weather forecast and climate
Vandalur, India

The last month of the rainy (monsoon) season, September, is another hot month in Vandalur, India, with average temperature ranging between min 26.9°C (80.4°F) and max 32.9°C (91.2°F).

Temperature

In September, the average high-temperature is relatively the same as in August - a still hot 32.9°C (91.2°F). In September, in Vandalur, the average low-temperature is 26.9°C (80.4°F).

Heat index

The average heat index in September is evaluated at an extremely hot 43.2°C (109.8°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 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, metabolic differences, differences in body mass, height, and shape, and wind affect individual temperature impact. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In September, the average relative humidity is 70%.

Rainfall

In Vandalur, during September, the rain falls for 25 days and regularly aggregates up to 104mm (4.09") of precipitation. Throughout the year, in Vandalur, there are 169.2 rainfall days, and 825mm (32.48") of precipitation is accumulated.

Daylight

In Vandalur, India, the average length of the day is 12.2h.

Sunshine

In September, the average sunshine in Vandalur is 10.5h.

UV index

In September, the average daily maximum UV index in Vandalur is 7. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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.

What is the temperature in September in Vandalur?

In September, the average high-temperature is 32.9°C (91.2°F), and the average low-temperature is 26.9°C (80.4°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, in September is calculated to 43.2°C (109.8°F).

What is the average humidity in September in Vandalur?

In Vandalur, India, the average relative humidity in September is 70%.

How many days does it rain in September in Vandalur?

In Vandalur, India, in September, during 25 rainfall days, 104mm (4.09") of precipitation is typically accumulated.

What is the average length of the day in September in Vandalur?

In September, the average length of the day in Vandalur, India, is 12.2h.

How long on average sun shines in September in Vandalur?

The average sunshine in September is 10.5h.

What is the UV index reading in September in Vandalur?

The average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Vandalur, India
  • Average high temperature in September: 32.9°C

The warmest month (with the highest average high temperature) is May (36.8°C).
The month with the lowest average high temperature is December (27.9°C).

  • Average low temperature in September: 26.9°C

The month with the highest average low temperature is May (29.4°C).
The coldest month (with the lowest average low temperature) is January (22.6°C).

Average pressure in September - Vandalur, India
  • Average pressure in September: 1006.8mbar

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 September - Vandalur, India
  • Average wind speed in September: 12.6km/h

The windiest month (with the highest average wind speed) is May (17.3km/h).
The calmest month (with the lowest average wind speed) is October (11.6km/h).

Average humidity in September - Vandalur, India
  • Average humidity in September: 70%

Months with the highest relative humidity are November and December (76%).
The month with the lowest relative humidity is June (58%).

Average rainfall in September - Vandalur, India
  • Average rainfall in September: 104mm

The wettest month (with the highest rainfall) is November (191mm).
The driest month (with the least rainfall) is February (6mm).

Average rainfall days in September - Vandalur, India
  • Average rainfall days in September: 25 days

The month with the highest number of rainy days is September (25 days).
The month with the least rainy days is February (3.4 days).

Average daylight in September / Average sunshine in September - Vandalur, India
  • Average daylight in September: 12.2h

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 September: 10.5h

The month with the most sunshine is May (Average sunshine: 11.8h).
Months with the least sunshine are November and December (Average sunshine: 6.2).

Average sunshine days in September - Vandalur, India
  • Average sunshine days in September: 3.5 days

The month with the most sunshine days is March (25.8 days).
The month with the least sunshine days is September (3.5 days).

Average UV index in September - Vandalur, India
  • Average UV index in September: 7

Months with the highest UV index are April, May, June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 6).

Average cloud cover in September - Vandalur, India
  • Average cloud cover in September: 38

The month with the most cloud cover is August (Cloud cover 42).
Months with the least cloud cover are March and April (Cloud cover 13).

Average visibility in September - Vandalur, India
  • Average visibility in September: 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).