September weather forecast
Puttalam, Sri Lanka

September brings in minimal temperature change in Puttalam, maintaining the same warmth as August. With consistent visibility and increased rainfall experienced across the city, the weather leans towards the tropical monsoon genre. Worthy of mention is the September wind speed, lessening to 26.5km/h (16.5mph) while continuing the decreasing trend observed from the June peak. Despite a climb in rainfall from the preceding month, residents and visitors can still enjoy the city's grandeur given the adequate daylight hours.

Temperature

The commencement of September in Puttalam, Sri Lanka, introduces an average high-temperature of a tropical 30°C (86°F), closely mirroring the preceding month. September records a small disparity from daytime temperatures, marking an average low-temperature of 26.5°C (79.7°F) in Puttalam, Sri Lanka.

Heat index

The heat index for September is computed to be a very hot 37°C (98.6°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is achieved by amalgamating air temperature with the relative humidity readings. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. 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.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In September, the average relative humidity in Puttalam is 77%.

Rainfall

In Puttalam, during September, the rain falls for 17.4 days and regularly aggregates up to 81mm (3.19") of precipitation. In Puttalam, during the entire year, the rain falls for 221.7 days and collects up to 1071mm (42.17") of precipitation.

Daylight

The average length of the day in September in Puttalam, Sri Lanka, is 12h and 10min.
On the first day of September, 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 Puttalam, the average sunshine in September is 8.9h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Puttalam. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Puttalam, Sri Lanka. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 7 suggests this advice:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. 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. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.