September weather forecast
Lunuwila, Sri Lanka

September, the first month of the autumn in Lunuwila, is also a moderately hot month, with temperature in the range of an average high of 29.5°C (85.1°F) and an average low of 25.2°C (77.4°F).

Temperature

The average high-temperature for September is a still moderately hot 29.5°C (85.1°F), closely aligning with the temperature of the preceding month. Lunuwila experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 25.2°C (77.4°F) throughout September.

Heat index

September's mean heat index is estimated at a fiery hot 36°C (96.8°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. 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. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In Lunuwila, the average relative humidity in September is 81%.

Rainfall

In Lunuwila, in September, it is raining for 24.4 days, with typically 153mm (6.02") of accumulated precipitation. Throughout the year, there are 265.4 rainfall days, and 1744mm (68.66") of precipitation is accumulated.

Daylight

In Lunuwila, Sri Lanka, 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 18:18. On the last day of September, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In Lunuwila, the average sunshine in September is 7.7h.

UV index

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Inhibit overexposure. Warding off sun damage is of utmost importance. 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. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.