September weather forecast
Vettavalam, India

The last month of the rainy (monsoon) season, September, is another hot month in Vettavalam, India, with an average temperature varying between 33.5°C (92.3°F) and 24.3°C (75.7°F).

Temperature

With the onset of September, a modest change to a still tropical 33.5°C (92.3°F) from August's 34.1°C (93.4°F) is noted in high-temperature. Nighttime temperature lowers to an average of 24.3°C (75.7°F) in September.

Heat index

For most parts of September, the heat index is appraised at a blisteringly hot 44°C (111.2°F). Forewarned: Heat cramps and heat exhaustion are anticipated. Ongoing physical activity increases the likelihood of heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. 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 remain especially vital for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

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

Rainfall

In September, the rain falls for 18.2 days. Throughout September, 44mm (1.73") of precipitation is accumulated. Throughout the year, there are 143.1 rainfall days, and 343mm (13.5") of precipitation is accumulated.

Daylight

In September, the average length of the day in Vettavalam is 12h and 12min.
On the first day of September, sunrise is at 6:02 am and sunset at 6:23 pm. On the last day of the month, sunrise is at 6:02 am and sunset at 6:03 pm IST.

Sunshine

The average sunshine in September in Vettavalam is 8.7h.

UV index

The average daily maximum UV index in September in Vettavalam is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Experience reduced UV exposure by about half when donning a wide-brim hat.