September weather forecastBentota, Sri Lanka

Weather in September

September in Bentota witnesses a considerable regression in rainfall and is a step towards more predictable and dry weather. September brings a shift in weather patterns, leading to a decrease in rainfall, creating more opportunities to indulge in outdoor activities. Towards the end of September, Bentota becomes crowdy as number of visitors tend to increase to experience the upcoming dry period. The weather condition stays mild, offering a nice cooling experience for visitors who aren’t fond of severe heat. Despite slight drops in weather parameters, nothing stands to diminish the attraction and allure of Bentota.

Temperature

The advent of September signifies a minor shift to an average high-temperature of a still moderately hot 28.8°C (83.8°F), aligning closely with August. September's average low-temperature is a still warm 25.2°C (77.4°F), reflecting a minor difference from the day's peak temperatures.

Heat index

The heat index value for September is estimated at a very hot 35°C (95°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. 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 and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The average relative humidity in September in Bentota is 82%.

Rainfall

In Bentota, in September, it is raining for 26.3 days, with typically 201mm (7.91") of accumulated precipitation. Throughout the year, in Bentota, there are 273.8 rainfall days, and 2059mm (81.06") of precipitation is accumulated.

Sea temperature

In Bentota, the average seawater temperature in September is 27.8°C (82°F).
Note: Swimming, diving, and other water endeavors at temperatures between 25°C (77°F) and 29°C (84.2°F) are considered enjoyable and satisfying for extended periods without discomfort.

Daylight

In Bentota, 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 18:16. On the last day of September, in Bentota, sunrise is at 05:57 and sunset at 18:01 +0530.

Sunshine

The average sunshine in September in Bentota is 7.6h.

UV index

The months with the highest UV index are January through April, July, September through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Shield from overexposure. Defense against sun-related harm is required. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Heads up! UV intensity is amplified by reflections from water and sand.