September weather forecast
Hulangamuwa, Sri Lanka

The first month of the autumn, September, is still a hot month in Hulangamuwa, Sri Lanka, with temperature in the range of an average high of 31°C (87.8°F) and an average low of 22.2°C (72°F).

Temperature

Hulangamuwa's shift from August to September is accompanied by an average high-temperature of a still tropical 31°C (87.8°F), a slight deviation from 30.8°C (87.4°F). September in Hulangamuwa generally records an average low-temperature of 22.2°C (72°F).

Heat index

September's average heat index is calculated to be a sweltering 39°C (102.2°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In Hulangamuwa, the average relative humidity in September is 73%.

Rainfall

In Hulangamuwa, in September, during 16.3 rainfall days, 82mm (3.23") of precipitation is typically accumulated. In Hulangamuwa, during the entire year, the rain falls for 218.8 days and collects up to 1175mm (46.26") of precipitation.

Daylight

The average length of the day in September is 12h and 10min.
On the first day of September, sunrise is at 05:59 and sunset at 18:15. On the last day of the month, sunrise is at 05:55 and sunset at 17:59 +0530.

Sunshine

In Hulangamuwa, the average sunshine in September is 10.3h.

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.