September weather forecast
Matara, Sri Lanka

September can be described as a transition period with the high temperature slightly dipping to 29.1°C (84.4°F), compared to 29.3°C (84.7°F) in August. In terms of weather patterns, there are a steady number of sunshine and daylight hours, making it appropriate for long strolls and sightseeing. Light showers accentuate the city's beauty, washing over streets and landscapes, and bringing a fresh feel to the surroundings. As the sea temperature inches back up, water activities remain a popular choice. Despite the winds slowing down, September offers an engaging weather experience to all its inhabitants.

Temperature

September brings the lowest temperatures in Matara, with an average high of 29.1°C (84.4°F) and an average low of 25.3°C (77.5°F).

Heat index

The average heat index in September is estimated at a torrid 35°C (95°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The months with the highest humidity in Matara, Sri Lanka, are May, September and November, with an average relative humidity of 81%.

Rainfall

In Matara, in September, it is raining for 13.2 days, with typically 48mm (1.89") of accumulated precipitation. In Matara, during the entire year, the rain falls for 180 days and collects up to 509mm (20.04") of precipitation.

Sea temperature

In Matara, in September, the average water temperature is 28.3°C (82.9°F).
Note: In water activities such as swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed highly pleasurable for extended periods without any unease.

Daylight

The average length of the day in September in Matara, Sri Lanka, is 12h and 9min.
On the first day of the month, sunrise is at 06:00 and sunset at 18:14. On the last day of September, sunrise is at 05:55 and sunset at 17:59 +0530.

Sunshine

The average sunshine in September is 8.6h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index in Matara, Sri Lanka, are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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 optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Beware! Reflections from sand and water can intensify the Sun's UV radiation.