September weather forecast
Udawalawa, Sri Lanka

The first month of the autumn, September, is still a hot month in Udawalawa, Sri Lanka, with temperature in the range of an average high of 30.1°C (86.2°F) and an average low of 26°C (78.8°F).

Temperature

In the transition from August to September, Udawalawa reports an average high-temperature of a still tropical 30.1°C (86.2°F), indicating a close resemblance to the prior month. Udawalawa's nighttime temperatures in September settle close to daytime highs at an average of 26°C (78.8°F).

Heat index

September's heat index is computed to be a torrid 37°C (98.6°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

The average relative humidity in September is 75%.

Rainfall

In Udawalawa, during September, the rain falls for 14.4 days and regularly aggregates up to 48mm (1.89") of precipitation. In Udawalawa, during the entire year, the rain falls for 192.9 days and collects up to 942mm (37.09") of precipitation.

Daylight

In September, the average length of the day in Udawalawa is 12h and 10min.
On the first day of the month, sunrise is at 05:59 and sunset at 18:13. On the last day of September, sunrise is at 05:54 and sunset at 17:58 +0530.

Sunshine

In Udawalawa, Sri Lanka, the average sunshine in September is 10.7h.

UV index

The months with the highest UV index in Udawalawa are January through September, November and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, an average UV index of 7 transforms into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. 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. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.