September weather forecast
Nintavur, Sri Lanka

The first month of the autumn, September, is also a hot month in Nintavur, Sri Lanka, with an average temperature fluctuating between 31.8°C (89.2°F) and 25.7°C (78.3°F).

Temperature

Nintavur measures an average high-temperature of a still tropical 31.8°C (89.2°F) in September, nearly consistent with the preceding month. Nintavur encounters a steady low-temperature average of 25.7°C (78.3°F) throughout the month of September.

Heat index

September's average heat index is estimated at a scorching 41°C (105.8°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In September, the average relative humidity is 72%.

Rainfall

In Nintavur, in September, it is raining for 22 days, with typically 81mm (3.19") of accumulated precipitation. In Nintavur, during the entire year, the rain falls for 237.8 days and collects up to 1259mm (49.57") of precipitation.

Daylight

In Nintavur, Sri Lanka, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 05:54 and sunset at 18:10. On the last day of September, sunrise is at 05:50 and sunset at 17:54 +0530.

Sunshine

The average sunshine in September is 10.7h.

UV index

January through October, with an average maximum UV index of 7, are months with the highest UV index in Nintavur. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Fend off overexposure. Sun protection is vital. 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. 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.