September weather forecast
Seeduwa, Sri Lanka

September, the first month of the autumn in Seeduwa, is still a warm month, with an average temperature ranging between max 29.5°C (85.1°F) and min 25.2°C (77.4°F).

Temperature

As Seeduwa transitions into September, the average high-temperature stands at a still warm 29.5°C (85.1°F), offering little variation from the preceding month. Seeduwa registers an average low-temperature of 25.2°C (77.4°F) throughout September, a modest decrease from its daytime highs.

Heat index

In September, the average heat index is evaluated at a fiery hot 36°C (96.8°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. 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 largely significant for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The average relative humidity in September in Seeduwa is 81%.

Rainfall

In Seeduwa, in September, it is raining for 24.4 days, with typically 153mm (6.02") of accumulated precipitation. Throughout the year, there are 265.4 rainfall days, and 1744mm (68.66") of precipitation is accumulated.

Daylight

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

Sunshine

The average sunshine in September is 7.7h.

UV index

The months with the highest UV index 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 unsafe exposure to UV radiation for ordinary individuals.
Note: An average UV index of 7 in September transforms into this advice:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.