September weather forecast
Makumbura, Sri Lanka

The first month of the autumn, September, is also a moderately hot month in Makumbura, Sri Lanka, with an average temperature fluctuating between 25.2°C (77.4°F) and 28.9°C (84°F).

Temperature

Entering September, the average high-temperature is recorded at a still warm 28.9°C (84°F), exhibiting a minimal shift from August's 28.6°C (83.5°F). Makumbura's September nights exhibit a subtle drop in temperature, averaging at a still warm 25.2°C (77.4°F), closely aligned with the daytime highs.

Heat index

Throughout September, the heat index is evaluated at a very hot 35°C (95°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

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

Rainfall

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

Daylight

In September, the average length of the day 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, in Makumbura, Sri Lanka, sunrise is at 05:58 and sunset at 18:01 +0530.

Sunshine

In September, the average sunshine is 7.5h.

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 value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: An average UV index of 7 in September transforms into this advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.