September weather forecast
Tanduvan, Sri Lanka

September, the first month of the autumn in Tanduvan, is still a warm month, with an average temperature fluctuating between 29.9°C (85.8°F) and 27°C (80.6°F).

Temperature

The average high-temperature in September, at a still moderately hot 29.9°C (85.8°F), reveals a modest deviation from August's 29.8°C (85.6°F). Tanduvan notes an average temperature descent to a still moderately hot 27°C (80.6°F) in September, a small shift from its daytime peak.

Heat index

During September, the heat index is estimated at a very hot 37°C (98.6°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Tanduvan, the average relative humidity in September is 77%.

Rainfall

In September, the rain falls for 15.5 days. Throughout September, 45mm (1.77") of precipitation is accumulated. In Tanduvan, during the entire year, the rain falls for 181.2 days and collects up to 849mm (33.43") of precipitation.

Daylight

The average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 05:58 and sunset at 18:15. On the last day of September, sunrise is at 05:55 and sunset at 17:58 +0530.

Sunshine

In September, the average sunshine is 9.7h.

UV index

The months with the highest UV index are January through October and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A typical high UV index of 7 in September suggests the following recommendations:
Fend off overexposure. Sun protection is vital. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.