September weather forecast
Gehenuwala, Sri Lanka

September, the first month of the autumn in Gehenuwala, is still a warm month, with temperature in the range of an average high of 29.1°C (84.4°F) and an average low of 24.9°C (76.8°F).

Temperature

September records an average high-temperature of a still warm 29.1°C (84.4°F), indicating a minor variation from the preceding month. An average low-temperature of 24.9°C (76.8°F) is witnessed throughout the month of September, a mere drop from the daytime peak.

Heat index

In September, the average heat index is calculated to be a fiery hot 35°C (95°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
In terms of the heat index, values are set with light wind and shade conditions in mind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In September, the average relative humidity is 81%.

Rainfall

In Gehenuwala, during September, the rain falls for 26.9 days and regularly aggregates up to 206mm (8.11") of precipitation. In Gehenuwala, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

The average length of the day in September in Gehenuwala is 12h and 10min.
On the first day of September in Gehenuwala, Sri Lanka, sunrise is at 06:02 and sunset at 18:17. On the last day of the month, sunrise is at 05:57 and sunset at 18:01 +0530.

Sunshine

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

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 of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. 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. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.