September weather forecast
Lunawa, Sri Lanka

September, the first month of the autumn in Lunawa, is still a warm month, with an average temperature ranging between min 25.2°C (77.4°F) and max 28.8°C (83.8°F).

Temperature

September's onset sees an average high-temperature of a still warm 28.8°C (83.8°F), exhibiting a slight fluctuation from the previous month. Lunawa documents a consistent average low-temperature of 25.2°C (77.4°F) at night during September.

Heat index

The heat index value for September is estimated at a torrid 35°C (95°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Research indicates the heat index considers values in shaded locales and with light winds. 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 a metric representing the sensation of warmth when air temperature and moisture come together. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. 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.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. 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. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In September, the average relative humidity is 82%.

Rainfall

In Lunawa, in September, it is raining for 26.3 days, with typically 201mm (7.91") of accumulated precipitation. Throughout the year, there are 273.8 rainfall days, and 2059mm (81.06") of precipitation is accumulated.

Daylight

In September, the average length of the day in Lunawa is 12h and 10min.
On the first day of the month, sunrise is at 06:03 and sunset at 18:17. On the last day of September, in Lunawa, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In Lunawa, the average sunshine in September is 7.6h.

UV index

January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: An average UV index of 7 in September transforms into this advice:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.