September weather forecast
Coimbatore, India

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

Temperature

Stepping into September, Coimbatore records an average high-temperature of a still hot 32.5°C (90.5°F), almost consistent with August. An average low-temperature of 22.5°C (72.5°F) is anticipated throughout the nights in Coimbatore, India, during September.

Heat index

In September, the heat index is appraised at a blisteringly hot 41°C (105.8°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Records show heat index calculations are tailored for shaded regions and mild winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In Coimbatore, the average relative humidity in September is 67%.

Rainfall

In Coimbatore, India, during September, the rain falls for 11.5 days and regularly aggregates up to 33mm (1.3") of precipitation. In Coimbatore, during the entire year, the rain falls for 131.5 days and collects up to 458mm (18.03") of precipitation.

Daylight

The average length of the day in September in Coimbatore, India, is 12h and 11min.
On the first day of the month, sunrise is at 6:12 am and sunset at 6:31 pm. On the last day of September, sunrise is at 6:10 am and sunset at 6:13 pm IST.

Sunshine

The average sunshine in September is 9.1h.

UV index

The average daily maximum UV index in September in Coimbatore is 7. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.