September weather forecast and climate
New Delhi, India

The tomb of Mughal Emperor Humayun, in New Delhi, India
The tomb of Mughal Emperor Humayun, in New Delhi, India

Weather in September

The last month of the rainy (monsoon) season, September, is also a sweltering month in New Delhi, India, with temperature in the range of an average low of 26.3°C (79.3°F) and an average high of 35°C (95°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still torrid 35°C (95°F). The average low-temperature, in New Delhi, is 26.3°C (79.3°F).

Heat index

In September, the average heat index is estimated at an extremely hot 43.6°C (110.5°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is a measure that combines 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 (metabolic differences, wind, pregnancy). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index 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. 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. 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 September, the average relative humidity is 57%.

Rainfall

In New Delhi, it is raining for 10.2 days, with typically 49mm (1.93") of accumulated precipitation. In New Delhi, during the entire year, the rain falls for 74.2 days and collects up to 305mm (12.01") of precipitation.

Daylight

In September, the average length of the day in New Delhi is 12.3h.

Sunshine

In New Delhi, the average sunshine in September is 9.1h.

UV index

In September, the average daily maximum UV index in New Delhi, India, is 8. A UV Index estimate of 8 to 10 represents a very high threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 8 in September transform into the following instructions:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 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. 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.
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FAQ

What is the temperature in September in New Delhi?

In New Delhi, in September, the average high-temperature is 35°C (95°F), and the average low-temperature is 26.3°C (79.3°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 43.6°C (110.5°F).

What is the average humidity in September in New Delhi?

In September, the average relative humidity in New Delhi, India, is 57%.

How much does it rain in New Delhi in September?

In September, in New Delhi, India, the rain falls for 10.2 days. Throughout September, 49mm (1.93") of precipitation is accumulated.

How many hours of daylight does New Delhi have in September?

The average length of the day in September is 12.3h.

How long on average sun shines in September in New Delhi?

In New Delhi, India, the average sunshine in September is 9.1h.

How high is the UV index in September in New Delhi?

In New Delhi, India, the average daily maximum UV index in September is 8. A UV Index estimate of 8 to 10 represents a very high health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
New Delhi, India

Average temperature in September - New Delhi, India
  • Average high temperature in September: 35°C

The warmest month (with the highest average high temperature) is June (42.4°C).
The month with the lowest average high temperature is January (20.8°C).

  • Average low temperature in September: 26.3°C

The month with the highest average low temperature is June (32°C).
The coldest month (with the lowest average low temperature) is January (9.2°C).

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Average pressure in September
New Delhi, India

Average pressure in September - New Delhi, India
  • Average pressure in September: 1003.4mbar

The month with the highest atmospheric pressure is January (1017mbar).
The month with the lowest atmospheric pressure is June (996.7mbar).

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Average wind speed in September
New Delhi, India

Average wind speed in September - New Delhi, India
  • Average wind speed in September: 8.3km/h

The windiest month (with the highest average wind speed) is June (10.6km/h).
The calmest month (with the lowest average wind speed) is October (6.7km/h).

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Average humidity in September
New Delhi, India

Average humidity in September - New Delhi, India
  • Average humidity in September: 57%

The month with the highest relative humidity is August (62%).
The month with the lowest relative humidity is May (18%).

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Average rainfall in September
New Delhi, India

Average rainfall in September - New Delhi, India
  • Average rainfall in September: 49mm

The wettest month (with the highest rainfall) is July (86mm).
The driest month (with the least rainfall) is October (2mm).

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Average rainfall days in September
New Delhi, India

Average rainfall days in September - New Delhi, India
  • Average rainfall days in September: 10.2 days

The month with the highest number of rainy days is August (17.2 days).
The month with the least rainy days is November (1.2 days).

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Average daylight in September /
Average sunshine in September
New Delhi, India

Average daylight in September / Average sunshine in September - New Delhi, India
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.9h).
The month with the shortest days is December (Average daylight: 10.3h).

  • Average sunshine in September: 9.1h

The month with the most sunshine is May (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 7.3h).

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Average sunshine days in September
New Delhi, India

Average sunshine days in September - New Delhi, India
  • Average sunshine days in September: 18.3 days

The month with the most sunshine days is December (29.5 days).
The month with the least sunshine days is August (12.3 days).

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Average UV index in September
New Delhi, India

Average UV index in September - New Delhi, India
  • Average UV index in September: 8

Months with the highest UV index are April, May and June (UV index 9).
The month with the lowest UV index is December (UV index 4).

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Average cloud cover in September
New Delhi, India

Average cloud cover in September - New Delhi, India
  • Average cloud cover in September: 23

The month with the most cloud cover is August (Cloud cover 38).
The month with the least cloud cover is October (Cloud cover 5).

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Average visibility in September
New Delhi, India

Average visibility in September - New Delhi, 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).

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