September weather forecast
Hewagama, Sri Lanka

September, the first month of the autumn in Hewagama, is still a warm month, with an average temperature varying between 29.1°C (84.4°F) and 24.9°C (76.8°F).

Temperature

During September, Hewagama observes a subtle ascent to a still warm 29.1°C (84.4°F) from August's 28.9°C (84°F) in the average high-temperature. During the month of September, Hewagama identifies an average nighttime low-temperature of 24.9°C (76.8°F), slightly lower than its daytime counterpart.

Heat index

In September, the average heat index is computed to be a torrid 35°C (95°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In September, the average relative humidity in Hewagama, Sri Lanka, is 81%.

Rainfall

In Hewagama, in September, it is raining for 26.9 days, with typically 206mm (8.11") of accumulated precipitation. In Hewagama, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

In Hewagama, 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, in Hewagama, sunrise is at 05:58 and sunset at 18:01 +0530.

Sunshine

In Hewagama, the average sunshine in September is 7.4h.

UV index

The months with the highest UV index in Hewagama 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 exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Prevent overexposure. Protection from the sun's harmful effects is needed. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Stay sun-safe with clothing that is both closely woven and worn loosely.