Coimbatore
India
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Coimbatore, India

The last month of the rainy (monsoon) season, September, is also a hot month in Coimbatore, India, with temperature in the range of an average high of 32.5°C (90.5°F) and an average low of 22.5°C (72.5°F).

Temperature

In Coimbatore, the average high-temperature in September is almost the same as in August - a still tropical 32.5°C (90.5°F). In September, the average low-temperature is 22.5°C (72.5°F).

Heat index

The average heat index in September is estimated at an extremely hot 40.7°C (105.3°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', 'feels like', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, metabolic differences, pregnancy), 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. 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 in Coimbatore is 67%.

Rainfall

In September, in Coimbatore, the rain falls for 11.5 days. Throughout September, 33mm (1.3") of precipitation is accumulated. Throughout the year, in Coimbatore, India, there are 131.5 rainfall days, and 458mm (18.03") of precipitation is accumulated.

Daylight

The average length of the day in Coimbatore, India, is 12.2h.

Sunshine

In Coimbatore, India, the average sunshine is 9.1h.

UV index

The average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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.

What is the temperature in September in Coimbatore?

In September, in Coimbatore, the average high-temperature is 32.5°C (90.5°F), and the average low-temperature is 22.5°C (72.5°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that takes the relative humidity and factores it into the air temperature reading, in September is estimated at 40.7°C (105.3°F).

What is the average humidity in September in Coimbatore?

The average relative humidity in September in Coimbatore, India, is 67%.

How many days does it rain in September in Coimbatore?

In September, in Coimbatore, the rain falls for 11.5 days. Throughout September, 33mm (1.3") of precipitation is accumulated.

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

The average length of the day in September in Coimbatore, India, is 12.2h.

How long on average sun shines in September in Coimbatore?

The average sunshine in September in Coimbatore is 9.1h.

How high is the UV index in September in Coimbatore?

The average daily maximum UV index in September in Coimbatore, India, is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Coimbatore, India
  • Average high temperature in September: 32.5°C

The warmest month (with the highest average high temperature) is April (37.7°C).
The month with the lowest average high temperature is December (28.5°C).

  • Average low temperature in September: 22.5°C

The month with the highest average low temperature is May (24.7°C).
The coldest month (with the lowest average low temperature) is January (18.1°C).

Average humidity in September - Coimbatore, India
  • Average humidity in September: 67%

The month with the highest relative humidity is November (77%).
The month with the lowest relative humidity is March (51%).

Average rainfall in September - Coimbatore, India
  • Average rainfall in September: 33mm

The wettest month (with the highest rainfall) is October (125mm).
The driest month (with the lowest rainfall) is January (8mm).

Average rainfall days in September - Coimbatore, India
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is October (20.1 days).
The month with the lowest number of rainy days is January (4.6 days).

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

The month with the longest days is June (Average daylight: 12.8h).
The month with shortest days is December (Average daylight: 11.5h).

  • Average sunshine in September: 9.1h

The month with most sunshine is May (Average sunshine: 10.6h).
The month with least sunshine is November (Average sunshine: 6.2h).

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

The month with the highest UV index is April (UV index 8).
Months with the lowest UV index are January, October, November and December (UV index 6).