September weather forecast
Vasudevanallur, India

September, the last month of the rainy (monsoon) season in Vasudevanallur, is also a hot month, with an average temperature fluctuating between 23.5°C (74.3°F) and 32.2°C (90°F).

Temperature

The shift into September finds Vasudevanallur at an average high-temperature of a still hot 32.2°C (90°F), closely comparable to August's conditions. Vasudevanallur throughout September, experiences an average nighttime temperature of 23.5°C (74.3°F).

Heat index

The heat index in September is evaluated at a blisteringly hot 40°C (104°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In September, the average relative humidity is 66%.

Rainfall

In Vasudevanallur, in September, it is raining for 17.6 days, with typically 54mm (2.13") of accumulated precipitation. Throughout the year, in Vasudevanallur, there are 208.7 rainfall days, and 796mm (31.34") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 11min.
On the first day of September, sunrise is at 6:11 am and sunset at 6:29 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 6:11 pm IST.

Sunshine

The average sunshine in September in Vasudevanallur, India, is 9h.

UV index

The months with the highest UV index are February through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 7 in September translates into this advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. 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. 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.