September weather forecast
Banjul, The Gambia

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The cool city of Banjul in the Gambia, with a distant view of the Gambia river
The cool city of Banjul in the Gambia, with a distant view of the Gambia river

Weather in September

As Banjul heads towards the final quarter of the year, the weather takes a turn from the intense monsoon experienced in August. Rainfall levels start to diminish, signaling the gradual retreat of the wet season. The city continues to enjoy long days and abundant sunshine, similar to August. One key highlight during this period is the decelerating wind speeds to 12.8km/h (8mph), resulting in calmer weather conditions. Despite the changes, the sea remains pleasantly warm at 28°C (82.4°F), providing enjoyable beach atmospheres.

Temperature

Banjul, The Gambia, notes an average high-temperature of a still moderately hot 29.5°C (85.1°F) in September, displaying minor variation from August. The temperature in Banjul during September nights demonstrates a small drop from the daytime highs, settling to an average of 26.1°C (79°F).

Heat index

The heat index in September is evaluated at a sweltering 36°C (96.8°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

August and September, with an average relative humidity of 80%, are the most humid months in Banjul.

Rainfall

In Banjul, in September, it is raining for 17.6 days, with typically 121mm (4.76") of accumulated precipitation. Throughout the year, in Banjul, The Gambia, there are 77 rainfall days, and 427mm (16.81") of precipitation is accumulated.

Sea temperature

The months with the warmest seawater in Banjul are July through November, with an average sea temperature of 28°C (82.4°F).
Note: Swimming, diving, and other activities in water temperatures between 25°C (77°F) and 29°C (84.2°F) are thought to be quite enjoyable and satisfying for extended periods, with no discomfort.

Daylight

In September, the average length of the day is 12h and 12min.
On the first day of September, sunrise is at 06:54 and sunset at 19:17. On the last day of the month, sunrise is at 06:55 and sunset at 18:56 GMT.

Sunshine

The average sunshine in September is 8.2h.

UV index

January, April through December, with an average maximum UV index of 7, are months with the highest UV index in Banjul. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 7 during September leads to these instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be wary! Reflections from sand and water make UV radiation more intense.
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Frequently asked questions

How hot does it get in Banjul in September?

The high-temperature, in September, in Banjul, records 29.5°C (85.1°F), while the low-temperature is 26.1°C (79°F). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is evaluated at 36°C (96.8°F).

What are the most humid months in Banjul?

August and September, with an average relative humidity of 80%, are most humid months in Banjul, The Gambia.

What is the average humidity in September in Banjul?

In September, the average relative humidity in Banjul is 80%.

How much does it rain in Banjul in September?

In September, in Banjul, The Gambia, the rain falls for 17.6 days. Throughout September, 121mm (4.76") of precipitation is accumulated.

What months are the sea warmest in Banjul?

The months with the warmest seawater in Banjul, The Gambia, are July through November, with an average sea temperature of 28°C (82.4°F).

How warm is the water in September in Banjul?

In Banjul, the average seawater temperature in September is 28°C (82.4°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.

What is the average length of the day in September in Banjul?

In Banjul, the average day length in September is 12h and 12min.

When is the sunrise / sunset in September in Banjul?

In September, on the first day of the month, sunrise is at 06:54 and sunset at 19:17. On the last day of the month, in Banjul, The Gambia, sunrise is at 06:55 and sunset at 18:56 GMT.

How many hours of sunshine does Banjul have in September?

In Banjul, the average sunshine duration in September is 8.2h.

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

The months with the highest UV index in Banjul, The Gambia, are January, April through December, with an average maximum UV index of 7.

What is the UV index reading in September in Banjul?

In September, the average daily maximum UV index in Banjul is 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.

Average temperature in September
Banjul, The Gambia

Average temperature in September - Banjul, The Gambia
  • Average high temperature in September: 29.5°C

The warmest month (with the highest average high temperature) is November (31.8°C).
The month with the lowest average high temperature is May (28.1°C).

  • Average low temperature in September: 26.1°C

The month with the highest average low temperature is October (26.9°C).
The coldest month (with the lowest average low temperature) is February (21.6°C).

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Average pressure in September
Banjul, The Gambia

Average pressure in September - Banjul, The Gambia
  • Average pressure in September: 1012mbar

The month with the highest atmospheric pressure is July (1012.6mbar).
The month with the lowest atmospheric pressure is April (1010.3mbar).

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Average wind speed in September
Banjul, The Gambia

Average wind speed in September - Banjul, The Gambia
  • Average wind speed in September: 12.8km/h

The windiest month (with the highest average wind speed) is February (18.6km/h).
The calmest month (with the lowest average wind speed) is September (12.8km/h).

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Average humidity in September
Banjul, The Gambia

Average humidity in September - Banjul, The Gambia
  • Average humidity in September: 80%

The months with the highest relative humidity are August and September (80%).
The month with the lowest relative humidity is January (39%).

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Average rainfall in September
Banjul, The Gambia

Average rainfall in September - Banjul, The Gambia
  • Average rainfall in September: 121mm

The wettest month (with the highest rainfall) is August (177mm).
The driest months (with the least rainfall) are January, February and December (0mm).

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Average rainfall days in September
Banjul, The Gambia

Average rainfall days in September - Banjul, The Gambia
  • Average rainfall days in September: 17.6 days

The month with the highest number of rainy days is August (21.6 days).
The month with the least rainy days is February (0.2 days).

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Average sea temperature in September
Banjul, The Gambia

Average sea temperature in September - Banjul, The Gambia
  • Average sea temperature in September: 28°C

The best months for swimming (with the highest average sea temperature) are July, August, September, October and November (28°C).
The coldest months (with the lowest average sea temperature) are February and March (21°C).

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Average daylight in September /
Average sunshine in September
Banjul, The Gambia

Average daylight in September / Average sunshine in September - Banjul, The Gambia
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in September: 8h and 1min

The months with the most sunshine are March, April and May (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 7h and 18min).

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Average sunshine days in September
Banjul, The Gambia

Average sunshine days in September - Banjul, The Gambia
  • Average sunshine days in September: 10.4 days

The months with the most sunshine days are January and December (30.7 days).
The month with the least sunshine days is August (7.3 days).

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Average UV index in September
Banjul, The Gambia

Average UV index in September - Banjul, The Gambia
  • Average UV index in September: 7

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

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Average cloud cover in September
Banjul, The Gambia

Average cloud cover in September - Banjul, The Gambia
  • Average cloud cover in September: 37

The month with the most cloud cover is August (Cloud cover 50).
The month with the least cloud cover is April (Cloud cover 6).

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Average visibility in September
Banjul, The Gambia

Average visibility in September - Banjul, The Gambia
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Banjul, The Gambia

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