September weather forecast
Siddamulla, Sri Lanka

The first month of the autumn, September, is still a warm month in Siddamulla, Sri Lanka, with an average temperature varying between 28.9°C (84°F) and 25.2°C (77.4°F).

Temperature

The transition from August to September sees an average high-temperature of a still warm 28.9°C (84°F), indicating a minor variance from the prior month. During the nights of September, Siddamulla records an average low-temperature of 25.2°C (77.4°F), reflecting a modest decrease from daytime highs.

Heat index

During September, the heat index is appraised at a very hot 35°C (95°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

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

Rainfall

In Siddamulla, in September, during 24.3 rainfall days, 189mm (7.44") of precipitation is typically accumulated. In Siddamulla, during the entire year, the rain falls for 272.3 days and collects up to 2039mm (80.28") of precipitation.

Daylight

In Siddamulla, Sri Lanka, 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

The average sunshine in September is 7.5h.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 7 during September leads to these instructions:
Deflect overexposure. Sun protection is a necessity. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.