September weather forecast
Gonawala, Sri Lanka

The first month of the autumn, September, is still a warm month in Gonawala, Sri Lanka, with an average temperature varying between 24.9°C (76.8°F) and 29.1°C (84.4°F).

Temperature

Gonawala marks the onset of September with an average high-temperature of a still warm 29.1°C (84.4°F), subtly divergent from August's 28.9°C (84°F). Gonawala notes a steady average temperature of 24.9°C (76.8°F) during the nights of September.

Heat index

The heat index value during September is appraised at a torrid 35°C (95°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Consider that heat index readings are for situations in the shade and light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

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

Rainfall

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

Daylight

In Gonawala, 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 18:17. On the last day of September, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In Gonawala, Sri Lanka, the average sunshine in September is 7.4h.

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 estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.