September weather forecast
Karaikal, India

The last month of the rainy (monsoon) season, September, is also a hot month in Karaikal, India, with an average temperature fluctuating between 31.7°C (89.1°F) and 27°C (80.6°F).

Temperature

The average high-temperature in September, at a still tropical 31.7°C (89.1°F), reveals a modest deviation from August's 32.1°C (89.8°F). Karaikal upholds a consistent average temperature of 27°C (80.6°F) throughout the nights of September.

Heat index

For most parts of September, the heat index is calculated to be a scorching 41°C (105.8°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', offers an insight into how hot it feels when we factor in moisture content. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In September, the average relative humidity in Karaikal, India, is 73%.

Rainfall

In September, the rain falls for 21.6 days. Throughout September, 84mm (3.31") of precipitation is accumulated. In Karaikal, during the entire year, the rain falls for 166.7 days and collects up to 891mm (35.08") of precipitation.

Daylight

In September, the average length of the day is 12h and 11min.
On the first day of September in Karaikal, sunrise is at 6:00 am and sunset at 6:20 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 6:01 pm IST.

Sunshine

In September, the average sunshine is 9.2h.

UV index

The average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 during September leads to these advisories:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun.