Bengaluru
India
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Bengaluru, India

September, the last month of the rainy (monsoon) season, in Bengaluru, is also a moderately hot month, with average temperature ranging between max 28.3°C (82.9°F) and min 19.7°C (67.5°F).

Temperature

In Bengaluru, the average high-temperature is almost the same as in August - a still moderately hot 28.3°C (82.9°F). In Bengaluru, the average low-temperature is 19.7°C (67.5°F).

Heat index

In September, the average heat index is calculated to a tropical 32.2°C (90°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy 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 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like wind, differences in body mass, height, and shape, metabolic differences, 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Bengaluru, the average relative humidity in September is 76%.

Rainfall

September is the month with the most rainfall. Rain falls for 10.3 days and accumulates 241mm (9.5") of precipitation.

Daylight

The average length of the day is 12.2h.

Sunshine

In September, the average sunshine in Bengaluru is 4.8h.

UV index

Months with the highest UV index are February through October, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 12 in September transform into the following instructions:
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. 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. Protect yourself by liberally applying a sunscreen of at least 30 SPF. Sunscreen prevents sunburn and decreases the damaging effects of Sun's radiation on the immune system.

What is the temperature in September in Bengaluru?

The average high-temperature, in September, is 28.3°C (82.9°F), while the average low-temperature is 19.7°C (67.5°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines both air temperature and relative humidity, in September is estimated at 32.2°C (90°F).

What is the average humidity in September in Bengaluru?

The average relative humidity in September in Bengaluru is 76%.

How much does it rain in Bengaluru in September?

In Bengaluru, India, in September, it is raining for 10.3 days, with typically 241mm (9.5") of accumulated precipitation.

What is the wettest month in Bengaluru?

September is the month with the most rainfall. Rain falls for 10.3 days and accumulates 241mm (9.5") of precipitation.

How many hours of daylight does Bengaluru have in September?

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

How long on average sun shines in September in Bengaluru?

In Bengaluru, the average sunshine in September is 4.8h.

When is the highest UV index in Bengaluru?

Months with the highest UV index are February through October, with an average maximum UV index of 12.

What is the UV index intensity in September in Bengaluru?

The average daily maximum UV index in September in Bengaluru is 12. A UV Index reading of 11, and higher, represents an excessive health risk from unprotected exposure to the UV radiation.
Average temperature in September - Bengaluru, India
  • Average high temperature in September: 28.3°C

The warmest month (with the highest average high temperature) is April (35.8°C).
The month with the lowest average high temperature is December (26.2°C).

  • Average low temperature in September: 19.7°C

The month with the highest average low temperature is April (21.8°C).
The coldest month (with the lowest average low temperature) is January (15.3°C).

Average humidity in September - Bengaluru, India
  • Average humidity in September: 76%

The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is March (45%).

Average rainfall in September - Bengaluru, India
  • Average rainfall in September: 241mm

The wettest month (with the highest rainfall) is September (241mm).
The driest month (with the lowest rainfall) is January (1.8mm).

Average rainfall days in September - Bengaluru, India
  • Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is September (10.3 days).
The month with the lowest number of rainy days is January (0.2 days).

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

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 September: 4.8h

Months with most sunshine are February and March (Average sunshine: 8.8h).
The month with least sunshine is July (Average sunshine: 3.6h).

Average UV index in September - Bengaluru, India
  • Average UV index in September: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are January, November and December (UV index 10).