August weather forecast and climate
Cotonou, Benin

August, the last month of the summer, in Cotonou, is another warm month, with temperature in the range of an average high of 27.8°C (82°F) and an average low of 23.4°C (74.1°F).
An excellent water temperature of 25°C (77°F) and only 5 rainfall days, with 64.9mm (2.56") of accumulated rainfall, makes August a prime for swimming and other water activities.

Temperature

August is the coldest month in Cotonou, with an average high-temperature of 27.8°C (82°F) and an average low-temperature of 23.4°C (74.1°F).

Heat index

In August, the average heat index is estimated at a hot 31.9°C (89.4°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
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 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, metabolic differences, clothing), and activity. 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. 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.

Humidity

In August, the average relative humidity in Cotonou is 82%.

Rainfall

In Cotonou, in August, it is raining for 5 days, with typically 64.9mm (2.56") of accumulated precipitation. Throughout the year, there are 75 rainfall days, and 1308.3mm (51.51") of precipitation is accumulated.

Sea temperature

August is the month with the coldest seawater, with an average sea temperature of 25°C (77°F).
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

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

Sunshine

In Cotonou, Benin, the average sunshine is 4.8h.

UV index

Months with the highest UV index in Cotonou, Benin, are February through May, August through October, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 12 interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the coldest month in Cotonou?

The coldest month in Cotonou, Benin, is August, with an average high-temperature of 27.8°C (82°F) and an average low-temperature of 23.4°C (74.1°F).

What is the temperature in August in Cotonou?

In August, in Cotonou, Benin, the average high-temperature is 27.8°C (82°F), and the average low-temperature is 23.4°C (74.1°F). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), that combines relative humidity and air temperature, is calculated to 31.9°C (89.4°F).

What is the average humidity in August in Cotonou?

The average relative humidity in August in Cotonou is 82%.

How many days does it rain in August in Cotonou?

In Cotonou, during August, the rain falls for 5 days and regularly aggregates up to 64.9mm (2.56") of precipitation.

When is the sea coldest in Cotonou?

August is the month with the coldest seawater, with an average sea temperature of 25°C (77°F).

What is the sea water temperature in August in Cotonou?

In Cotonou, Benin, in August, the average water temperature is 25°C (77°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.

What is the average length of the day in August in Cotonou?

In Cotonou, Benin, the average length of the day in August is 12.3h.

How many hours of sunshine does Cotonou have in August?

In Cotonou, Benin, the average sunshine in August is 4.8h.

When is the highest UV index in Cotonou?

Months with the highest UV index in Cotonou are February through May, August through October, with an average maximum UV index of 12.

What is the UV index intensity in August in Cotonou?

In August, the average daily maximum UV index is 12. A UV Index estimate of 11, and higher, represents an ultimate hazard to health from the exposure to the Sun's UV radiation.
Average temperature in August - Cotonou, Benin
  • Average high temperature in August: 27.8°C

The warmest month (with the highest average high temperature) is March (31.9°C).
The month with the lowest average high temperature is August (27.8°C).

  • Average low temperature in August: 23.4°C

The month with the highest average low temperature is March (25.9°C).
The coldest month (with the lowest average low temperature) is August (23.4°C).

Average humidity in August - Cotonou, Benin
  • Average humidity in August: 82%

The month with the highest relative humidity is June (84%).
The month with the lowest relative humidity is April (76.5%).

Average rainfall in August - Cotonou, Benin
  • Average rainfall in August: 64.9mm

The wettest month (with the highest rainfall) is June (356mm).
The driest month (with the least rainfall) is January (9.2mm).

Average rainfall days in August - Cotonou, Benin
  • Average rainfall days in August: 5 days

The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is January (1 days).

Average sea temperature in August - Cotonou, Benin
  • Average sea temperature in August: 25°C

The best months for swimming (with the highest average sea temperature) are March, April, May and November (29°C).
The coldest month (with the lowest average sea temperature) is August (25°C).

Average daylight in August / Average sunshine in August - Cotonou, Benin
  • Average daylight in August: 12.3h

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 August: 4.8h

The month with the most sunshine is November (Average sunshine: 8.1h).
The month with the least sunshine is July (Average sunshine: 4.4h).

Average UV index in August - Cotonou, Benin
  • Average UV index in August: 12

Months with the highest UV index are February, March, April, May, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).