September weather forecast
Perumanallur, India

The last month of the rainy (monsoon) season, September, is another hot month in Perumanallur, India, with temperature in the range of an average low of 23.5°C (74.3°F) and an average high of 33.3°C (91.9°F).

Temperature

The start of September marks an average high-temperature of a still hot 33.3°C (91.9°F), hardly distinguishable from the conditions in August. An average low-temperature of 23.5°C (74.3°F) marks the nights throughout September.

Heat index

The average heat index in September is evaluated at an extremely hot 42°C (107.6°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. 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. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In Perumanallur, the average relative humidity in September is 64%.

Rainfall

In Perumanallur, during September, the rain falls for 18.7 days and regularly aggregates up to 72mm (2.83") of precipitation. Throughout the year, in Perumanallur, India, there are 176.8 rainfall days, and 769mm (30.28") of precipitation is accumulated.

Daylight

In Perumanallur, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 6:10 am and sunset at 6:30 pm. On the last day of September, sunrise is at 6:09 am and sunset at 6:11 pm IST.

Sunshine

The average sunshine in September is 9.1h.

UV index

In Perumanallur, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 7 during September leads to these advisories:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.