Bentota
Sri Lanka
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Bentota, Sri Lanka

September, the first month of the autumn, in Bentota, is still a warm month, with temperature in the range of an average high of 28.8°C (83.8°F) and an average low of 25.2°C (77.4°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still warm 28.8°C (83.8°F). In Bentota, in September, the average low-temperature is 25.2°C (77.4°F).

Heat index

The average heat index in September is calculated to a tropical 34.6°C (94.3°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, clothing). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Bentota, Sri Lanka, the average relative humidity is 82%.

Rainfall

In September, the rain falls for 26.3 days. Throughout September, 201mm (7.91") of precipitation is accumulated. In Bentota, during the entire year, the rain falls for 273.8 days and collects up to 2059mm (81.06") of precipitation.

Sea temperature

In Bentota, the average water temperature is 27.8°C (82°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in September is 12.2h.

Sunshine

In Bentota, Sri Lanka, 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 in Bentota. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in September in Bentota?

In September, in Bentota, the average high-temperature is 28.8°C (83.8°F), and the average low-temperature is 25.2°C (77.4°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that factores the actual air temperature with the relative humidity, in September is evaluated at 34.6°C (94.3°F).

What is the average humidity in September in Bentota?

In Bentota, Sri Lanka, the average relative humidity in September is 82%.

How much does it rain in Bentota in September?

In Bentota, Sri Lanka, during September, the rain falls for 26.3 days and regularly aggregates up to 201mm (7.91") of precipitation.

What is the water temperature in September in Bentota?

In Bentota, in September, the average water temperature is 27.8°C (82°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Bentota have in September?

In September, the average length of the day is 12.2h.

How many hours of sunshine does Bentota have in September?

The average sunshine in September in Bentota, Sri Lanka, is 7.6h.

What is the month with the highest UV index in Bentota?

January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index.

How high is the UV index in September in Bentota?

In Bentota, Sri Lanka, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.
Average temperature in September - Bentota, Sri Lanka
  • Average high temperature in September: 28.8°C

The warmest months (with the highest average high temperature) are March and April (31.3°C).
The month with the lowest average high temperature is August (28.6°C).

  • Average low temperature in September: 25.2°C

The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23.4°C).

Average humidity in September - Bentota, Sri Lanka
  • Average humidity in September: 82%

Months with the highest relative humidity are June, July and August (83%).
Months with the lowest relative humidity are January and February (75%).

Average rainfall in September - Bentota, Sri Lanka
  • Average rainfall in September: 201mm

The wettest month (with the highest rainfall) is June (350mm).
The driest month (with the least rainfall) is January (25mm).

Average rainfall days in September - Bentota, Sri Lanka
  • Average rainfall days in September: 26.3 days

Months with the highest number of rainy days are July and August (29.5 days).
The month with the least rainy days is January (8.9 days).

Average sea temperature in September - Bentota, Sri Lanka
  • Average sea temperature in September: 27.8°C

The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is July (27.3°C).

Average daylight in September / Average sunshine in September - Bentota, Sri Lanka
  • Average daylight in September: 12.2h

Months with the longest days are June and July (Average daylight: 12.5h).
Months with the shortest days are January, November and December (Average daylight: 11.8h).

  • Average sunshine in September: 7.6h

The month with the most sunshine is January (Average sunshine: 9.2h).
The month with the least sunshine is November (Average sunshine: 6.8h).

Average UV index in September - Bentota, Sri Lanka
  • Average UV index in September: 7

Months with the highest UV index are January, February, March, April, July, September, October, November and December (UV index 7).
Months with the lowest UV index are May, June and August (UV index 6).