September weather forecast and climate
Banjul, The Gambia

A bird
A bird's eye view of the cool city of Banjul in the Gambia, with a distant view of the Gambia River
The first month of the autumn, September, is still a warm month in Banjul, The Gambia, with average temperature ranging between max 29.5°C (85.1°F) and min 26.1°C (79°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still moderately hot 29.5°C (85.1°F). In Banjul, The Gambia, the average low-temperature is 26.1°C (79°F).

Heat index

In September, the average heat index is evaluated at a sweltering 36.2°C (97.2°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. 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', 'apparent temperature', 'real feel', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like differences in body mass, height, and shape, clothing, metabolic differences, and activity influence one's weather impression. 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. 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. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

Months with the highest humidity in Banjul are August and September, with an average relative humidity of 80%.

Rainfall

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

Sea temperature

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

Daylight

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

Sunshine

In September, the average sunshine 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 health hazard from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. 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 Banjul?

In September, in Banjul, The Gambia, the average high-temperature is 29.5°C (85.1°F), and the average low-temperature is 26.1°C (79°F). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that calculates temperature value influenced by the moisture in the air, is estimated at 36.2°C (97.2°F).

What are the most humid months in Banjul?

Months with the highest humidity are August and September, with an average relative humidity of 80%.

What is the average humidity in September in Banjul?

The average relative humidity in September in Banjul is 80%.

How much does it rain in Banjul in September?

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

When is the sea warmest in Banjul?

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

What is the sea water temperature in September in Banjul?

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

How many hours of daylight does Banjul have in September?

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

How many hours of sunshine does Banjul have in September?

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

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

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

How high is the UV index in September in Banjul?

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

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).

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).

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

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

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).

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).

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).

Average daylight in September / Average sunshine in September - Banjul, The Gambia
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 12.9h).
The month with the shortest days is December (Average daylight: 11.3h).

  • Average sunshine in September: 8.2h

Months with the most sunshine are March, April and May (Average sunshine: 9.9h).
The month with the least sunshine is August (Average sunshine: 7.3h).

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

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).

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

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

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

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