September weather forecast
Lewis Place, Sri Lanka

September, the first month of the autumn in Lewis Place, is also a moderately hot month, with an average temperature varying between 29.5°C (85.1°F) and 25.2°C (77.4°F).

Temperature

The arrival of September denotes a barely perceptible change in the average high-temperatures to a still moderately hot 29.5°C (85.1°F) from August's 29.3°C (84.7°F). With a barely noticeable fluctuation in temperature, Lewis Place reaches an average low of 25.2°C (77.4°F) during the September nights.

Heat index

During September, the heat index is estimated at a torrid 36°C (96.8°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly meaningful for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. 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. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In September, the average relative humidity is 81%.

Rainfall

In September, in Lewis Place, the rain falls for 24.4 days. Throughout September, 153mm (6.02") of precipitation is accumulated. In Lewis Place, during the entire year, the rain falls for 265.4 days and collects up to 1744mm (68.66") of precipitation.

Daylight

The average length of the day in September is 12h and 10min.
On the first day of September in Lewis Place, sunrise is at 06:02 and sunset at 18:18. On the last day of the month, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In September, the average sunshine is 7.7h.

UV index

The months with the highest UV index in Lewis Place, Sri Lanka, are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.