September weather forecast
Undugoda, Sri Lanka

The first month of the autumn, September, is also a moderately hot month in Undugoda, Sri Lanka, with an average temperature fluctuating between 21.1°C (70°F) and 29.5°C (85.1°F).

Temperature

The onset of September brings with it an average high-temperature of a still moderately hot 29.5°C (85.1°F), showing a negligible variation from the month before. During September, the temperature in Undugoda, Sri Lanka, tends to dip to an average of 21.1°C (70°F) at night.

Heat index

The heat index value during September is evaluated at a torrid 35°C (95°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In September, the rain falls for 23.4 days. Throughout September, 118mm (4.65") of precipitation is accumulated. Throughout the year, in Undugoda, there are 278.4 rainfall days, and 1466mm (57.72") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 10min.
On the first day of September in Undugoda, sunrise is at 06:00 and sunset at 18:16. On the last day of the month, sunrise is at 05:56 and sunset at 18:00 +0530.

Sunshine

The average sunshine in September is 10.3h.

UV index

January through September, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: A maximum daily UV index of 6 during September morphs into the following directions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.