September weather forecast
Pannipitiya, Sri Lanka

The first month of the autumn, September, is still a warm month in Pannipitiya, Sri Lanka, with an average temperature ranging between max 28.9°C (84°F) and min 25.2°C (77.4°F).

Temperature

The shift into September uncovers an average high-temperature of a still warm 28.9°C (84°F), subtly different from the previous month. During the month of September, Pannipitiya's average nighttime temperature closely mirrors its daytime counterpart, at a still warm 25.2°C (77.4°F).

Heat index

Throughout September, the heat index is computed to be a torrid 35°C (95°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Given the heat index, its values are aligned with shaded sites and gentle winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In Pannipitiya, the average relative humidity in September is 82%.

Rainfall

In September, the rain falls for 24.3 days. Throughout September, 189mm (7.44") of precipitation is accumulated. In Pannipitiya, Sri Lanka, 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 in Pannipitiya is 12h and 10min.
On the first day of September in Pannipitiya, sunrise is at 06:02 and sunset at 18:17. On the last day of the month, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In September, the average sunshine in Pannipitiya, Sri Lanka, is 7.5h.

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 in Pannipitiya. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 in September interprets into the following advice:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.