September weather forecast and climate
Chengannur, India

The last month of the rainy (monsoon) season, September, is another warm month in Chengannur, India, with average temperature ranging between max 29.9°C (85.8°F) and min 23.7°C (74.7°F).

Temperature

In Chengannur, the average high-temperature is almost the same as in August - a still warm 29.9°C (85.8°F). The average low-temperature, in September, is 23.7°C (74.7°F).

Heat index

In September, the average heat index is calculated to a torrid 37.6°C (99.7°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, clothing, differences in body mass, height, and shape), and activity. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In September, the average relative humidity in Chengannur is 81%.

Rainfall

In September, in Chengannur, India, the rain falls for 21.5 days. Throughout September, 135mm (5.31") of precipitation is accumulated. Throughout the year, there are 245.5 rainfall days, and 1652mm (65.04") of precipitation is accumulated.

Daylight

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

Sunshine

The average sunshine in Chengannur, India, is 7.6h.

UV index

Months with the highest UV index are January through May, September through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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.

What is the temperature in September in Chengannur?

In Chengannur, in September, the average high-temperature is 29.9°C (85.8°F), and the average low-temperature is 23.7°C (74.7°F). In September, the average heat index (a.k.a. 'feels like', 'real feel'), that combines relative humidity and air temperature, is estimated at 37.6°C (99.7°F).

What is the average humidity in September in Chengannur?

The average relative humidity in September in Chengannur is 81%.

How much does it rain in Chengannur in September?

In September, in Chengannur, the rain falls for 21.5 days. Throughout September, 135mm (5.31") of precipitation is accumulated.

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

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

How long on average sun shines in September in Chengannur?

The average sunshine in September in Chengannur is 7.6h.

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

January through May, September through December, with an average maximum UV index of 7, are months with the highest UV index in Chengannur, India.

What is the UV index intensity in September in Chengannur?

In September, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV rays.
Average temperature in September - Chengannur, India
  • Average high temperature in September: 29.9°C

The warmest months (with the highest average high temperature) are March and April (33.9°C).
The month with the lowest average high temperature is August (29.2°C).

  • Average low temperature in September: 23.7°C

The month with the highest average low temperature is May (26.1°C).
The coldest month (with the lowest average low temperature) is January (21.8°C).

Average pressure in September - Chengannur, India
  • Average pressure in September: 1009.4mbar

The month with the highest atmospheric pressure is January (1012mbar).
The month with the lowest atmospheric pressure is May (1008.1mbar).

Average wind speed in September - Chengannur, India
  • Average wind speed in September: 9.1km/h

The windiest month (with the highest average wind speed) is July (10.1km/h).
The calmest month (with the lowest average wind speed) is November (6.2km/h).

Average humidity in September - Chengannur, India
  • Average humidity in September: 81%

Months with the highest relative humidity are July and August (82%).
The month with the lowest relative humidity is February (69%).

Average rainfall in September - Chengannur, India
  • Average rainfall in September: 135mm

The wettest month (with the highest rainfall) is June (359mm).
The driest month (with the least rainfall) is January (9mm).

Average rainfall days in September - Chengannur, India
  • Average rainfall days in September: 21.5 days

The month with the highest number of rainy days is June (27.8 days).
The month with the least rainy days is January (7.3 days).

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

The month with the longest days is June (Average daylight: 12.7h).
Months with the shortest days are January and December (Average daylight: 11.6h).

  • Average sunshine in September: 7.6h

Months with the most sunshine are January and February (Average sunshine: 9.7h).
The month with the least sunshine is June (Average sunshine: 6.5h).

Average sunshine days in September - Chengannur, India
  • Average sunshine days in September: 5.2 days

The month with the most sunshine days is January (21.5 days).
The month with the least sunshine days is June (0.5 days).

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

Months with the highest UV index are January, February, March, April, May, September, October, November and December (UV index 7).
Months with the lowest UV index are June, July and August (UV index 6).

Average cloud cover in September - Chengannur, India
  • Average cloud cover in September: 53

The month with the most cloud cover is June (Cloud cover 60).
The month with the least cloud cover is February (Cloud cover 17).

Average visibility in September - Chengannur, India
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, November and December (10km).
Months with the lowest visibility are May, June, July, August, September and October (9km).