September weather forecast
Gambia, Guinea-Bissau

The first month of the autumn, September, is still a tropical month in Gambia, Guinea-Bissau, with an average temperature varying between 23.6°C (74.5°F) and 31.4°C (88.5°F).

Temperature

At the onset of September, Gambia records an average high-temperature of a still tropical 31.4°C (88.5°F), showing little deviation from the preceding month. The low-temperature averages to a moderately hot 23.6°C (74.5°F) during the nights of September.

Heat index

The heat index value for September is appraised at an extremely hot 44°C (111.2°F). Warning: Heat cramps and heat exhaustion are anticipated. Heatstroke is a risk with ongoing activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

The months with the highest humidity are August and September, with an average relative humidity of 84%.

Rainfall

In Gambia, during September, the rain falls for 24.5 days and regularly aggregates up to 153mm (6.02") of precipitation. In Gambia, during the entire year, the rain falls for 111.2 days and collects up to 710mm (27.95") of precipitation.

Daylight

In September, the average length of the day is 12h and 11min.
On the first day of September, sunrise is at 06:51 and sunset at 19:11. On the last day of the month, sunrise is at 06:50 and sunset at 18:52 GMT.

Sunshine

In September, the average sunshine is 7.2h.

UV index

The average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Enhance your sun protection with tightly woven, yet airy clothing.