September weather forecast
Ilhéu do Mancebo, Guinea-Bissau

September, the first month of the autumn in Ilhéu do Mancebo, is a tropical month, with temperature in the range of an average low of 25°C (77°F) and an average high of 30.5°C (86.9°F).

Temperature

Ilhéu do Mancebo's transition from August to September introduces an average high-temperature of a hot 30.5°C (86.9°F), marking an insignificant variation from the 29.6°C (85.3°F). Nighttime temperature experiences an average drop to a warm 25°C (77°F) in September.

Heat index

During September, the heat index is evaluated at a blistering 40°C (104°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

The average relative humidity in September is 81%.

Rainfall

In Ilhéu do Mancebo, in September, during 20.7 rainfall days, 132mm (5.2") of precipitation is typically accumulated. Throughout the year, in Ilhéu do Mancebo, Guinea-Bissau, there are 107.5 rainfall days, and 726mm (28.58") of precipitation is accumulated.

Daylight

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

Sunshine

The average sunshine in September is 7.5h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Ilhéu do Mancebo, Guinea-Bissau. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, an average UV index of 7 transforms into the following instructions:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.