September weather forecast
Ragama, Sri Lanka

September, the first month of the autumn in Ragama, is also a moderately hot month, with temperature in the range of an average high of 29.1°C (84.4°F) and an average low of 24.9°C (76.8°F).

Temperature

The shift from August to September is characterized by an average high-temperature of a still moderately hot 29.1°C (84.4°F), not significantly different from the 28.9°C (84°F) of August. Nighttime temperatures in Ragama, Sri Lanka, during September report a consistent average of 24.9°C (76.8°F).

Heat index

In September, the heat index is appraised at a torrid 35°C (95°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Ragama, Sri Lanka, the average relative humidity in September is 81%.

Rainfall

In Ragama, during September, the rain falls for 26.9 days and regularly aggregates up to 206mm (8.11") of precipitation. Throughout the year, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.

Daylight

In Ragama, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 06:02 and sunset at 18:17. On the last day of September, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In Ragama, the average sunshine in September is 7.4h.

UV index

The months with the highest UV index in Ragama are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 during September translates into the following guidance:
Guard against overexposure. Protection from sun-induced harm is essential. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.