Colombo
Sri Lanka
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Colombo, Sri Lanka

Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake, and a view of the tall buildings of Colombo
Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake, and a view of the tall buildings of Colombo
Agosto, the last month of the summer, in Colombo, is also a hot month, with average temperature fluctuating between 30°C (86°F) and 25.1°C (77.2°F).

Temperature

The coldest months are Julio, Agosto and Octubre, with an average high-temperature of 30°C (86°F).

Heat index

In Agosto, the average heat index is estimated at a very hot 36.8°C (98.2°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. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in Agosto is 77%.

Rainfall

In Colombo, during 11 rainfall days, 119.5mm (4.7") of precipitation is typically accumulated. In Colombo, during the entire year, the rain falls for 145 days and collects up to 2523.7mm (99.36") of precipitation.

Sea temperature

With an average sea temperature of 27.2°C (81°F), Agosto is the month with the coldest seawater.
Note: 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.

Daylight

In Colombo, the average length of the day is 12.3h.

Sunshine

In Agosto, the average sunshine is 6.5h.

UV index

Months with the highest UV index in Colombo, Sri Lanka, are Febrero through Octubre, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: In Agosto, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the coldest month in Colombo?

Julio, Agosto and Octubre, with an average high-temperature of 30°C (86°F), are the coldest months.

What is the temperature in Agosto in Colombo?

The average high-temperature, in Agosto, in Colombo, is 30°C (86°F), while the average low-temperature is 25.1°C (77.2°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines air temperature and relative humidity, in Agosto is calculated to 36.8°C (98.2°F).

What is the average humidity in Agosto in Colombo?

In Agosto, the average relative humidity is 77%.

How much does it rain in Colombo in Agosto?

In Colombo, Sri Lanka, during Agosto, the rain falls for 11 days and regularly aggregates up to 119.5mm (4.7") of precipitation.

What is the month with the coldest sea water in Colombo?

Agosto is the month with the coldest seawater in Colombo, with an average sea temperature of 27.2°C (81°F).

How warm is the water in Agosto in Colombo?

In Colombo, the average seawater temperature in Agosto is 27.2°C (81°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Colombo have in Agosto?

The average length of the day in Agosto is 12.3h.

How long on average sun shines in Agosto in Colombo?

In Colombo, Sri Lanka, the average sunshine in Agosto is 6.5h.

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

Febrero through Octubre, with an average maximum UV index of 12, are months with the highest UV index in Colombo.

How high is the UV index in Agosto in Colombo?

In Colombo, Sri Lanka, the average daily maximum UV index in Agosto is 12. A UV Index of 11, and more, symbolizes an extreme health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in August - Colombo, Sri Lanka
  • Average high temperature in August: 30°C

The warmest month (with the highest average high temperature) is April (31.8°C).
Months with the lowest average high temperature are July, August and October (30°C).

  • Average low temperature in August: 25.1°C

Months with the highest average low temperature are May and June (25.5°C).
The coldest month (with the lowest average low temperature) is January (22.3°C).

Average humidity in August - Colombo, Sri Lanka
  • Average humidity in August: 77%

The month with the highest relative humidity is June (79%).
Months with the lowest relative humidity are January and February (69%).

Average rainfall in August - Colombo, Sri Lanka
  • Average rainfall in August: 119.5mm

The wettest month (with the highest rainfall) is November (414.4mm).
The driest month (with the lowest rainfall) is January (58.2mm).

Average rainfall days in August - Colombo, Sri Lanka
  • Average rainfall days in August: 11 days

The month with the highest number of rainy days is October (17 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in August - Colombo, Sri Lanka
  • Average sea temperature in August: 27.2°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 August (27.2°C).

Average daylight in August / Average sunshine in August - Colombo, Sri Lanka
  • Average daylight in August: 12.3h

Months with the longest days are June and July (Average daylight: 12.5h).
The month with shortest days is December (Average daylight: 11.7h).

  • Average sunshine in August: 6.5h

The month with most sunshine is March (Average sunshine: 8.9h).
The month with least sunshine is September (Average sunshine: 6.3h).

Average UV index in August - Colombo, Sri Lanka
  • Average UV index in August: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are January, November and December (UV index 11).