September weather forecast and climate
Banjul, The Gambia

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.