September weather forecast
Periyakulam, India

The last month of the rainy (monsoon) season, September, is another hot month in Periyakulam, India, with an average temperature varying between 31.6°C (88.9°F) and 22.9°C (73.2°F).

Temperature

September's climate reveals an average high-temperature of a still tropical 31.6°C (88.9°F), consistent with August. The low-temperature average for Periyakulam during September stands at a pleasant 22.9°C (73.2°F).

Heat index

The heat index in September is calculated to be a sweltering 37°C (98.6°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', ties air temperature with relative humidity to produce the perceived temperature sensation. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In September, the average relative humidity is 64%.

Rainfall

In Periyakulam, in September, during 18.2 rainfall days, 67mm (2.64") of precipitation is typically accumulated. In Periyakulam, during the entire year, the rain falls for 177.9 days and collects up to 910mm (35.83") of precipitation.

Daylight

In September, the average length of the day in Periyakulam is 12h and 11min.
On the first day of the month, sunrise is at 6:10 am and sunset at 6:29 pm. On the last day of September, sunrise is at 6:08 am and sunset at 6:10 pm IST.

Sunshine

In September, the average sunshine is 9.2h.

UV index

February through September, with an average maximum UV index of 7, are months with the highest UV index in Periyakulam, India. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, a regular UV index of 7 translates into these guidelines:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.