September weather forecast
Ahungalla, Sri Lanka

Ahungalla in September denotes the end of the monsoon season with the rainfall reducing slightly to 222mm (8.74"), but continues to shower consistently throughout the month. However, the UV index drops to 6, although this does not drastically improve the overall weather conditions. Nevertheless, it gets considerably windier in September with maximum gust speeds reaching 25.7km/h (16mph), a noticeable drop from the previous month's gusting winds. Additionally, cloud cover lingers at 50%, limiting the amount of direct sunlight received during the day. Temperatures maintain a relatively stable profile, signaling the gradual retreat of the rains and the start of the drier season in the upcoming months.

Temperature

Ahungalla witnesses its lowest temperatures during August and September, when the average high-temperature reaches 28.3°C (82.9°F).

Heat index

In September, the heat index is calculated to be a hot 33°C (91.4°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.

Humidity

The months with the highest humidity are June and September, with an average relative humidity of 82%.

Rainfall

In Ahungalla, in September, it is raining for 24.5 days, with typically 222mm (8.74") of accumulated precipitation. In Ahungalla, during the entire year, the rain falls for 286.9 days and collects up to 1974mm (77.72") of precipitation.

Sea temperature

July through September, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater.
Note: For swimming, diving, or other water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) provide the most enjoyable experience for extended periods without discomfort.

Daylight

The average length of the day in September in Ahungalla, Sri Lanka, is 12h and 10min.
On the first day of September, sunrise is at 06:02 and sunset at 18:16. On the last day of the month, sunrise is at 05:57 and sunset at 18:01 +0530.

Sunshine

In September, the average sunshine is 8.5h.

UV index

May and September, with an average maximum UV index of 6, are months with the lowest UV index in Ahungalla, Sri Lanka. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 6 during September translates into these guidelines:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Attention! UV radiation is markedly stronger with water and sand reflections.