Dakar
Senegal
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Dakar, Senegal

A high aerial view of the vast city of Dakar, Senegal, with a beautiful outline of the Atlantic Ocean waterfront
A high aerial view of the vast city of Dakar, Senegal, with a beautiful outline of the Atlantic Ocean waterfront
September, the first month of the autumn, in Dakar, is also a hot month, with average temperature varying between 24.4°C (75.9°F) and 30.4°C (86.7°F).

Temperature

September and October, with an average high-temperature of 30.4°C (86.7°F), are the warmest months.

Heat index

In September, the average heat index is calculated to a sweltering 39.2°C (102.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. 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 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, metabolic differences), 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 especially crucial for babies and toddlers. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

With an average relative humidity of 81%, September is the most humid month.

Rainfall

In Dakar, Senegal, during 8 rainfall days, 156.5mm (6.2") of precipitation is typically accumulated. In Dakar, during the entire year, the rain falls for 24 days and collects up to 494.3mm (19.5") of precipitation.

Sea temperature

September is the month with the warmest seawater, with an average sea temperature of 28.7°C (83.7°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

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

Sunshine

The average sunshine in September is 7.3h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in 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. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the warmest month in Dakar?

September and October, with an average high-temperature of 30.4°C (86.7°F), are warmest months in Dakar, Senegal.

What is the temperature in September in Dakar?

The average high-temperature, in September, is 30.4°C (86.7°F), while the average low-temperature is 24.4°C (75.9°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that combines relative humidity and air temperature, in September is calculated to 39.2°C (102.6°F).

What is the most humid month in Dakar?

September is the most humid month in Dakar, with an average relative humidity of 81%.

What is the average humidity in September in Dakar?

In September, the average relative humidity in Dakar is 81%.

How much does it rain in Dakar in September?

In Dakar, Senegal, in September, during 8 rainfall days, 156.5mm (6.2") of precipitation is typically accumulated.

What month is the sea warmest in Dakar?

The month with the warmest seawater in Dakar, Senegal, is September, with an average sea temperature of 28.7°C (83.7°F).

How warm is the water in September in Dakar?

In Dakar, Senegal, in September, the average water temperature is 28.7°C (83.7°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 September in Dakar?

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

How long on average sun shines in September in Dakar?

In September, the average sunshine is 7.3h.

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

Months with the highest UV index in Dakar, Senegal, are March through September, with an average maximum UV index of 12.

How high is the UV index in September in Dakar?

In September, the average daily maximum UV index in Dakar is 12. A UV Index value of 11, and more, symbolizes an extreme health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Dakar, Senegal
  • Average high temperature in September: 30.4°C

Warmest months (with the highest average high temperature) are September and October (30.4°C).
The month with the lowest average high temperature is February (24.6°C).

  • Average low temperature in September: 24.4°C

The month with the highest average low temperature is August (24.6°C).
The coldest month (with the lowest average low temperature) is February (17°C).

Average humidity in September - Dakar, Senegal
  • Average humidity in September: 81%

The month with the highest relative humidity is September (81%).
The month with the lowest relative humidity is December (66%).

Average rainfall in September - Dakar, Senegal
  • Average rainfall in September: 156.5mm

The wettest month (with the highest rainfall) is August (184mm).
Driest months (with the lowest rainfall) are March, April and May (0mm).

Average rainfall days in September - Dakar, Senegal
  • Average rainfall days in September: 8 days

The month with the highest number of rainy days is August (9 days).
Months with the lowest number of rainy days are January, February, March, April, May, November and December (0 days).

Average sea temperature in September - Dakar, Senegal
  • Average sea temperature in September: 28.7°C

The best month for swimming (with the highest average sea temperature) is September (28.7°C).
The coldest month (with the lowest average sea temperature) is March (19.9°C).

Average daylight in September / Average sunshine in September - Dakar, Senegal
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 13h).
The month with shortest days is December (Average daylight: 11.3h).

  • Average sunshine in September: 7.3h

The month with most sunshine is April (Average sunshine: 9.6h).
The month with least sunshine is August (Average sunshine: 7.2h).

Average UV index in September - Dakar, Senegal
  • Average UV index in September: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 8).