September weather forecastSanthiveli, Sri Lanka

Weather in September

The first month of the autumn, September, is still a tropical month in Santhiveli, Sri Lanka, with temperature in the range of an average low of 25.7°C (78.3°F) and an average high of 31.8°C (89.2°F).

Temperature

The commencement of September notes an average high-temperature of a still tropical 31.8°C (89.2°F), exhibiting little difference from the previous month. Santhiveli, during September nights, observes an average temperature of 25.7°C (78.3°F).

Heat index

September's mean heat index is calculated to be an extremely hot 41°C (105.8°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In Santhiveli, the average relative humidity in September is 72%.

Rainfall

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

Daylight

The average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:11. On the last day of September, sunrise is at 05:51 and sunset at 17:55 +0530.

Sunshine

The average sunshine in September is 10.7h.

UV index

The months with the highest UV index are January through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.