September weather forecastChepauk, India

Weather in September

The last month of the rainy (monsoon) season, September, is another tropical month in Chepauk, India, with an average temperature varying between 31.6°C (88.9°F) and 27.3°C (81.1°F).

Temperature

The transition into September is marked with an average high-temperature of a still tropical 31.6°C (88.9°F), showing an insignificant shift from August's 32.3°C (90.1°F). Chepauk notes a consistent average low-temperature of 27.3°C (81.1°F) during September nights.

Heat index

For September, the heat index is estimated at a scorching 40°C (104°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. 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. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In September, the average relative humidity is 72%.

Rainfall

In September, in Chepauk, the rain falls for 23.1 days. Throughout September, 98mm (3.86") of precipitation is accumulated. Throughout the year, in Chepauk, there are 157.6 rainfall days, and 823mm (32.4") of precipitation is accumulated.

Daylight

In September, the average length of the day in Chepauk, India, is 12h and 12min.
On the first day of September, sunrise is at 5:57 am and sunset at 6:19 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 5:59 pm IST.

Sunshine

In Chepauk, the average sunshine in September is 10.7h.

UV index

The average daily maximum UV index in September in Chepauk is 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.